Welding device and battery piece series welding machine
By designing multiple independent power welding lamp modules and cooling components, combining lenses and temperature measurement components, the problem of uneven temperature in cell string welding is solved, and the uniform distribution of welding temperature and high consistency of welding effect is achieved.
Patent Information
- Application Number
- CN202420556853.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-21
AI Technical Summary
During the welding of existing battery cells, the temperature is uneven due to parallel arrangement of infrared lamps, resulting in dummy or over-welding, and the welding adhesion effect is uneven and the deviation is large.
Design a welding device, including multiple independent power welding lamp modules, each module is evenly arranged, and the heat distribution is adjusted through the distribution of different density and wavelengths, combining lenses and cooling components to ensure uniform welding temperature, and use Real-time control of temperature measurement components and adjustment structures.
The uniform distribution of welding temperature is achieved, the welding consistency is improved, the dummy or over-welding is avoided, and the high consistency of welding effect is ensured.
Smart Images
Figure CN222176246U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of solar cells, especially the field of cell string manufacturing. In particular, the present application relates to a welding device and a cell string welding machine for cell string welding. Background Art
[0002] The photovoltaic cell string is formed by stacking the welding ribbons and the cells in a predetermined order, and welding the welding ribbons to the main grid lines of the cells.
[0003] At present, parallel infrared lamps are generally used to heat and weld the cells. However, the temperature around the parallel lamps is uneven, which will lead to uneven surface temperature of the cells, resulting in cold welding or over welding when the cells are welded in series. In addition, the uneven heat and large temperature difference will lead to uneven welding and adhesion between the cells and the welding strips, with large deviations. Utility Model Content
[0004] The example of the present application provides a welding device and a battery cell string welding machine for battery cell string welding, which can achieve uniform heating and improve welding consistency.
[0005] On the one hand, an example of the present application provides a welding device, including: a welding light board arranged in a battery string welding area, the welding light board including a plurality of welding light modules with independent welding power, each welding light module being arranged with lamp beads.
[0006] The welding lamp board is composed of multiple welding lamp modules with independent welding power, which makes it easy to flexibly adjust the welding power of each welding lamp module according to the distribution of welding temperature, helping to ensure the even distribution of heat generated by the welding device, thereby improving the welding consistency of the battery cell.
[0007] According to some examples of the present application, the arrangement of the lamp beads includes: the lamp beads are distributed at a first density in the central area of the welding lamp module, and are distributed at a second density at the periphery of the central area of the welding lamp module; and / or, the lamp beads in the central area of the welding lamp module have emitted light of a first wavelength, and the lamp beads at the periphery of the central area of the welding lamp module have emitted light of a second wavelength.
[0008] By distributing lamp beads at different densities in the central area and the periphery of the central area of the welding lamp module, the difference in heat generated in the two areas can be adjusted, thereby ensuring that the welding temperature of the welding device is evenly distributed, thereby improving the welding consistency when the battery cell string is welded. In addition, by distributing lamp beads with different emission wavelengths in the central area and the periphery of the central area of the welding lamp module, the difference in heat generated in the two areas can also be adjusted, thereby ensuring that the welding temperature of the welding device is evenly distributed.
[0009] According to some examples of the present application, the second density is greater than the first density, and the second wavelength is greater than the first wavelength.
[0010] The lamp beads on the welding lamp module are set to have a greater distribution density of lamp beads on the periphery of the central area than on the central area, to prevent the situation where the central area generates too much heat while the periphery generates too little heat, which helps to narrow the temperature gap between the central area and the periphery of the central area, and ensure a more uniform distribution of welding temperature. The wavelength of light emitted by the lamp beads on the periphery of the central area is greater than the wavelength of light emitted by the infrared lamp beads in the central area. This method also improves the situation where the central area of the welding lamp module generates too much heat while the periphery generates too little heat, narrows the gap between the two, and ensures that the heat generated by the welding lamp module is more uniform, thereby ensuring a more uniform distribution of welding temperature. This avoids false soldering or over-soldering, and makes the welding effect of the grid line have a higher degree of consistency.
[0011] According to some examples of the present application, the lamp beads on each welding lamp module are evenly arranged, and the switching time of each welding lamp module is controlled independently of each other.
[0012] The welding lamp module with independently controlled on and off times can adjust the accumulated heat in each area according to the welding duration, thus improving the previous problem of uneven heat.
[0013] According to some examples of the present application, the lamp beads are infrared lamp beads, and the infrared lamp beads are integrated with lenses, and the divergence angles of the lenses of all infrared lamp beads cover the battery string welding area.
[0014] By using a lens to disperse the light emitted by the lamp beads to cover the battery string welding area, it is possible to avoid excessive concentration of heat and cause local excessive temperature.
[0015] According to some examples of the present application, the lamp beads are infrared lamp beads, and the infrared lamp beads are integrated with lenses with a divergence angle of 5-120 degrees.
[0016] The lens can be configured to disperse the emitted light and avoid excessive local temperature.
[0017] According to some examples of the present application, the welding device further includes a temperature measuring component, which is disposed on the welding lamp board and is used to detect the temperature of the welding lamp module.
[0018] The temperature of the welding lamp module can be monitored by the temperature measuring component, which is convenient for timely regulation.
[0019] According to some examples of the present application, the welding device further includes a cooling component, which is disposed on a surface of the welding lamp board facing away from the infrared lamp beads.
[0020] The cooling components are used to dissipate the heat of the welding lamp board to prevent heat accumulation and excessive temperature from affecting welding.
[0021] According to some examples of the present application, the cooling component includes a body, an inlet and an outlet arranged on the body, and a plurality of cooling channels arranged inside the body and connected to the inlet and the outlet, wherein the plurality of cooling channels are distributed inside the body in parallel with each other.
[0022] Multiple cooling channels distributed parallel to each other inside the body can ensure that the cooling medium flows quickly to achieve efficient heat dissipation.
[0023] According to some examples of the present application, a heat conductive material is filled between the cooling component and the welding lamp board.
[0024] The heat conductive material can promote heat conduction, and the welding light board has a good heat dissipation effect.
[0025] According to some examples of the present application, the cooling component further includes an adjusting structure, and the adjusting structure is used to adjust the flow rate of the cooling medium in the cooling component.
[0026] The regulating structure can adjust the flow rate of the cooling medium so that the cooling components have different heat dissipation efficiencies, thereby regulating the flow rate of the cooling medium according to the real-time temperature of the welding lamp board, controlling the temperature in the box, and ensuring the welding effect.
[0027] According to some examples of the present application, the welding device also includes a box body, the welding light boards are all arranged in the box body, and a shading plate for blocking the emitted light is arranged in the box body along the outer periphery of the welding light board.
[0028] By arranging the welding lamp panel in the box and arranging a shading plate on the periphery of the welding lamp panel, heat loss can be prevented and heat utilization efficiency can be improved.
[0029] According to some examples of the present application, the box body includes an upper box body located above the battery string welding area and provided with a welding light board, and a lower box body located below the battery string welding area and provided with a shading plate. The upper box body and the lower box body cooperate to form a closed space, and the closed space has an inlet and an outlet for the passage of the parts to be welded.
[0030] A highly enclosed space is formed by the cooperation of the upper box and the lower box, the welding light board is arranged in the upper box, and a shading plate is arranged under the battery string welding area. This can more effectively prevent the light emitted by the lamp beads from diffusing and affecting the battery cells to be welded or the battery cells that have been welded. At the same time, it can also avoid heat loss and improve heat utilization efficiency.
[0031] According to some examples of the present application, a protective glass is provided under the welding light panel.
[0032] The protective glass helps to protect the welding lamp module from mechanical damage.
[0033] According to some examples of the present application, the welding device further includes a ventilation component, which is connected to the space between the welding lamp board and the protective glass.
[0034] The ventilation components can remove the waste gas, tiny particles, etc. generated during the welding process from the space between the welding lamp panel and the protective glass to avoid affecting the welding effect.
[0035] On the other hand, the present application also provides a battery cell string welding machine, which includes the above-mentioned welding device, as well as a battery cell loading device, a solder strip loading device, and a conveying device; the battery cell loading device and the solder strip loading device stack the battery cells and the solder strips on the conveying device, the conveying device conveys the stacked solder strips and battery cells to the welding device, and the welding device welds the solder strips and battery cells into a battery string.
[0036] The battery cell string welding machine provided in the present application completes the loading of soldering ribbons and battery cells through soldering ribbon feeding devices and battery cell feeding devices, completes the conveying of battery cells and soldering ribbons through a conveying device, completes the welding of battery strings through a welding device, and the welding device ensures that the soldering ribbons and battery cells are heated evenly and stably during string welding, thereby improving the consistency of welding between battery strings and soldering ribbons. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] For a clearer explanation, the following briefly introduces the drawings required for the description.
[0038] Figure 1 This is a structural schematic diagram of a welding lamp board in the first embodiment of the present application;
[0039] Figure 2 For assembly Figure 1 A schematic diagram of the structure of the welding lamp module of the welding lamp board;
[0040] Figure 3 This is a structural schematic diagram of a welding lamp board in the second embodiment of the present application;
[0041] Figure 4 For assembly Figure 3 A schematic diagram of the structure of the welding lamp module of the welding lamp board;
[0042] Figure 5 This is a schematic diagram of the structure of the welding lamp board in the third embodiment of the present application;
[0043] Figure 6 This is a schematic diagram of the structure of the cooling component in the embodiment of the present application;
[0044] Figure 7 It is a structural schematic diagram of the AA section of the cooling component in the embodiment of the present application.
[0045] Description of reference numerals:
[0046] 100-welding lamp board; 110-welding lamp module; 111-lamp beads;
[0047] 200 - cooling component; 210 - first inlet; 220 - first outlet; 230 - cooling channel. DETAILED DESCRIPTION
[0048] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.
[0049] The strip-shaped welding ribbon is stacked with the battery cell, and the welding ribbon is aligned with the main grid line of the battery cell, and a battery string is formed by string welding. During string welding, the welding ribbon and the main grid line of the battery cell are heated and welded by the welding device in the battery string welding area to form a fixed connection. Current heating welding generally relies on parallel arranged lamps, which are used to heat the welding ribbon and the battery cell in the battery string welding area. However, heat will be dissipated around the lamp tubes, and the heating temperature is uneven, which leads to uneven welding temperature in the battery string welding area, which is easy to cause cold welding or over-welding during string welding, which seriously affects the quality of the battery string.
[0050] In view of this, an embodiment of the present application provides a welding device, which generates uniform heat, thereby ensuring uniform welding temperature in the battery string welding area, thereby ensuring uniform welding effect of the entire grid line of the battery cell.
[0051] Combination Figures 1 to 4 As shown, the welding device includes a welding lamp board 100, which is arranged in the battery string welding area so that the light generated by the welding lamp board 100 can be radiated to the battery cells located in the battery string welding area, so that the battery cells are heated by the light, and the welding lamp board 100 includes a plurality of welding lamp modules 110 with independent welding power, and each welding lamp module 110 is arranged with lamp beads 111. As shown in the accompanying drawings, a plurality of lamp beads 111 are arranged on each welding lamp module 110, and the welding lamp board 100 includes a plurality of such welding lamp modules 110, and the number of lamp beads 111 on each welding lamp module 110 can be the same or different.
[0052] In one implementation, the welding device can be arranged above or below the battery string welding area to perform light heating on the battery cells in the welding area; of course, in order to ensure faster heating or to heat both sides of the battery cells, the welding device can also be arranged above and below the welding area at the same time. When the welding device is located below the welding area, the supporting component of the welding area needs to be light-transmissive. The specific welding area can use a light-transmissive belt or a light-transmissive tray.
[0053] In one implementation, the lamp beads 111 on each welding lamp module 110 are evenly arranged.
[0054] In one implementation, the lamp beads 111 of each welding lamp module 110 emit light with the same wavelength, and the wavelength is greater than 800 nm.
[0055] The embodiment of the present application forms a welding lamp board 100 through a plurality of welding lamp modules 110 with independent welding powers. When implementing welding heating, it is convenient to flexibly adjust the welding power of each welding lamp module 110 according to the distribution of welding temperature, thereby ensuring that the light generated by the welding device is evenly distributed, thereby making the temperature of the battery string welding area uniform and consistent, and having good consistency when the battery cell group string is welded.
[0056] Combine the following Figures 1 to 5 When further describing the specific implementation, the arrangement and distribution of the lamp beads 111 on the welding lamp module 110 can adopt one of the following methods.
[0057] In one implementation, combining Figures 1 to 4 As shown, the distribution surface of the lamp beads 111 of the welding lamp module 110 has a central area and a periphery surrounding the central area. The lamp beads 111 are distributed at a first density in the central area of the welding lamp module 110, and are distributed at a second density at the periphery of the central area of the welding lamp module 110. The central area and the periphery of the central area are distributed with different densities of the lamp beads 111, which can adjust the difference in heat generated by the periphery of the central area and the central area, which helps to ensure that the welding lamp module 110 is heated evenly, and then ensures that the welding temperature of the battery string welding area is evenly distributed, so that the consistency of the battery cell string welding is better.
[0058] Furthermore, in one example, the second density is greater than the first density, which can prevent the welding lamp module 110 from having a situation where the central area generates too much heat while the peripheral area generates too little heat, and helps to reduce the temperature difference between the central area and the peripheral area, ensuring a more uniform welding temperature distribution.
[0059] In one implementation, combining Figures 1 to 4As shown, the lamp bead distribution surface of the welding lamp module 110 has a central area and a periphery surrounding the central area. The lamp beads 111 in the central area of the welding lamp module 110 have a first wavelength of emitted light, and the lamp beads 111 in the periphery of the central area of the welding lamp module 110 have a second wavelength of emitted light. In this embodiment, by distributing lamp beads 111 with different emission wavelengths in the central area and the periphery of the central area of the welding lamp module 110, the difference in heat generated between the periphery of the central area and the central area can be adjusted, which helps to ensure that the welding lamp module 110 generates heat evenly, and further ensures that the welding temperature distribution of the battery string welding area is even, so that the consistency of the welding adhesion between the battery cell and the welding ribbon is better.
[0060] Furthermore, in one example, the second wavelength is greater than the first wavelength, and the longer the wavelength of the emitted light, the easier it is to be absorbed by the workpiece to be welded. This method can avoid the situation where the central area of the welding lamp module 110 generates too much heat while the periphery generates less heat, thereby narrowing the gap between the two and ensuring that the heat generated by the welding lamp module 110 is relatively uniform, thereby ensuring that the temperature of the battery string welding area is uniform, avoiding cold soldering or over-soldering when the battery cells are soldered in series, and the welding effect of the grid line has a high degree of consistency.
[0061] In one implementation, combining Figures 1 to 4 As shown, the distribution surface of the lamp beads 111 of the welding lamp module 110 has a central area and a periphery surrounding the central area. In this embodiment, the lamp beads 111 distributed at a first density in the central area of the welding lamp module 110 are configured to emit light with a first wavelength, and the lamp beads 111 distributed at a second density at the periphery of the central area are configured to emit light with a second wavelength. It can be understood that this embodiment comprehensively considers the distribution density and the wavelength of the emitted light of the lamp beads 111, and therefore has the benefits of the aforementioned embodiment.
[0062] As an example of this implementation, the second density is greater than the first density. As another example of this implementation, the second wavelength is greater than the first wavelength. In specific implementation, an implementation method in which the second density is greater than the first density and the second wavelength is greater than the first wavelength may also be selected. These implementations can avoid and improve the situation in which the central area of the welding lamp module 110 generates too much heat while the peripheral area generates less heat, narrow the gap between the two, and ensure that the heat generated by the welding lamp module 110 is relatively uniform, thereby ensuring that the surface temperature of the battery cells in the battery string welding area is uniform, avoiding cold welding or over-welding during battery cell string welding, and the welding effect of the grid line has a high degree of consistency.
[0063] In one implementation, combining Figure 5As shown, when this method is implemented, the lamp beads 111 on each welding lamp module 110 are evenly arranged, and the switching time of each welding lamp module 110 is independently controlled. Exemplarily, the power supply circuit of each welding lamp module 110 is independent, and the working time of each welding lamp module 110 can be independently controlled by turning on and off the power supply circuit. The accumulated heat generated by the lamp beads 111 on the welding lamp module 110 is different for different working times. Therefore, this method can adjust the accumulated heat generation of each area by the welding duration, thereby improving the problem of uneven heat.
[0064] The above mainly discusses the setting and arrangement of the lamp beads 111 on the welding lamp module 110. Now, the description of the structural form of the lamp beads 111 will be turned to.
[0065] Combination Figures 1 to 5 As shown, in some embodiments, the lamp bead 111 is an infrared lamp bead, which can emit infrared light.
[0066] In one implementation, the infrared lamp bead has the function of emitting light with a wavelength of 800nm. The battery cell absorbs the light emitted by the infrared lamp bead and is heated. Therefore, the infrared lamp bead can complete the welding of the battery cell and the welding strip. In addition, the infrared lamp bead is integrated with a lens, which is directly encapsulated (or bonded) on the infrared lamp bead and becomes a whole with the infrared lamp bead. The lens improves the light output efficiency of the infrared lamp bead and changes the light field distribution of the emitted light. The divergence angle of the lens of all infrared lamp beads covers the battery string welding area. The emitted light of the lamp bead 111 is diverged to cover the battery string welding area with the help of the lens, which can avoid excessive heat concentration and cause excessive local temperature.
[0067] Combination Figures 1 to 5 As shown, in other embodiments, the lamp bead 111 is the infrared lamp bead described above, and the infrared lamp bead is integrated with a lens with a divergence angle of 5-120 degrees. The lens can be configured to diverge the emitted light and then radiate it to the battery string welding area to avoid excessive local temperature. In addition, during the specific implementation, the lamp bead 111 that is close to the battery string welding area is configured with a lens with a larger divergence angle, for example, a lens with a divergence angle of 100 degrees, 108 degrees, 110 degrees, 116 degrees, and 120 degrees, while the lamp bead 111 that is far from the battery string welding area is configured with a lens with a smaller divergence angle, for example, a lens with a divergence angle of 5 degrees, 18 degrees, 20 degrees, 26 degrees, 32 degrees, 36 degrees, and 45 degrees, so as to avoid the heat generated by the emitted light from being too concentrated in the battery string welding area.
[0068] In one implementation, a suitable lamp bead 111 can also be selected according to the distance between the welding device and the workpiece to be welded. If the welding device is relatively close to the workpiece to be welded when working, a lens with a divergence angle of 100 degrees, 108 degrees, 110 degrees, 116 degrees, or 120 degrees can be selected. If the welding device is far away from the workpiece to be welded when working, a lens with a divergence angle of 5 degrees, 18 degrees, 20 degrees, 26 degrees, 32 degrees, 36 degrees, or 45 degrees can be selected.
[0069] Next, we turn to the description of other structural components of the welding device.
[0070] In some embodiments, the welding device may further include a temperature measuring component, which is disposed on the welding lamp board 100 and is used to detect the temperature of the welding lamp module 110. The temperature of the welding lamp module 110 can be monitored by the temperature measuring component to facilitate timely regulation. In specific implementation, the temperature measuring component may be a thermistor, a thermocouple, or an infrared probe.
[0071] See also Figure 6 and Figure 7 As shown, in some embodiments, the welding device may further include a cooling component 200, which is disposed on the surface of the welding lamp board 100 facing away from the infrared lamp beads and forms face-to-face contact with the surface. The welding lamp board 100 dissipates heat through the contact with the cooling component 200 to prevent heat accumulation from causing the temperature of the welding lamp board 100 to be too high, thereby affecting the battery string welding.
[0072] Exemplarily, the cooling component 200 includes a body, a first inlet 210 and a first outlet 220 disposed on the body, and a plurality of cooling channels 230 disposed inside the body and connected to the first inlet 210 and the first outlet 220, wherein the plurality of cooling channels 230 are distributed in parallel with each other inside the body. The cooling medium can flow more quickly in the plurality of cooling channels 230 distributed in parallel with each other inside the body, thereby achieving efficient heat dissipation.
[0073] In order to promote heat conduction and ensure good heat dissipation effect of the welding lamp board 100, a heat conductive material is filled between the cooling component 200 and the welding lamp board 100. For example, the heat conductive material can be thermal conductive silicone grease, or a thermal conductive pad formed after the thermal conductive silicone grease is cured. The provision of the heat conductive material ensures full contact between the welding lamp board 100 and the cooling component 200, thereby improving the heat dissipation effect.
[0074] According to some examples of the present application, the cooling component 200 may further include an adjusting structure, and the adjusting structure is used to adjust the flow rate of the cooling medium in the cooling component 200. The adjusting structure may be a pump, or a solenoid valve.
[0075] The adjustment structure can adjust the flow rate of the cooling medium so that the cooling component 200 has different heat dissipation efficiencies, thereby adjusting the flow rate of the cooling medium according to the real-time temperature of the welding lamp board 100, controlling the temperature of the welding lamp board 100, and then adjusting the welding temperature of the battery string welding area to ensure the welding effect.
[0076] According to some examples of the present application, the welding device further includes a box body, the welding lamp board 100 is disposed in the box body, and a shading plate for shielding the emitted light is disposed in the box body along the periphery of the welding lamp board 100, the shading plate is perpendicular to the distribution surface of the lamp beads of the welding lamp module 110, and the shading plate disposed along the periphery of the welding lamp board 100 encloses and separates the welding lamp board 100 from the space on the other side of the shading plate. By disposing the welding lamp board 100 in the box body and the shading plate disposed on the periphery of the welding lamp board 100, the light emitted by the lamp beads 111 can be prevented from diffusing and affecting the battery cells to be welded or the battery cells that have been welded, and heat loss can also be avoided, thereby improving heat utilization efficiency.
[0077] According to some examples of the present application, the box body includes an upper box body and a lower box body, wherein the upper box body is located above the battery string welding area and is provided with a welding light board 100, and the lower box body is located below the battery string welding area and is provided with a shading plate. The shading plate can be set below the battery string welding area, and the upper box body and the lower box body cooperate to form a relatively high enclosed space, and the enclosed space has a second inlet and a second outlet for the parts to be welded to pass through. With the help of the upper box body and the lower box body, a relatively high enclosed space is formed, and the welding light board 100 is set in the upper box body, and a shading plate is set below the battery string welding area. This can more effectively prevent the light emitted by the lamp beads 111 from diffusing and affecting the battery cells to be welded or the battery cells that have been welded. At the same time, it can also avoid heat loss and improve heat utilization efficiency.
[0078] According to some examples of the present application, in order to prevent the welding lamp module 110 from being mechanically damaged, a protective glass is provided under the welding lamp board 100. Exemplarily, the protective glass is quartz glass.
[0079] According to some examples of the present application, the welding device further includes a ventilation component, which is connected to the space between the welding lamp board 100 and the protective glass. The ventilation component includes an exhaust component or a blowing component. The ventilation component can remove waste gas, tiny particles, etc. generated during welding from the space between the welding lamp board 100 and the protective glass to avoid affecting the welding effect.
[0080] On the other hand, an embodiment of the present application also provides a battery cell string welding machine, which includes the above-mentioned welding device, as well as a battery cell loading device, a solder strip loading device and a conveying device; the battery cell loading device and the solder strip loading device stack the battery cells and the solder strips on the conveying device, the conveying device conveys the stacked solder strips and battery cells to the welding device, and the welding device welds the solder strips and battery cells into a battery string.
[0081] In one implementation, the battery cell loading device includes a robot arm on which a suction cup for adsorbing the battery cells is installed; the solder strip loading device includes a mobile servo module on which a chuck for clamping the solder strip is installed, and the mobile module drives the chuck to move to place the solder strip on the conveying device; the welding device welds the solder strip and the battery cell into a battery string.
[0082] In one implementation, the mobile servo module is driven by a motor, and the chuck is driven by a cylinder.
[0083] The battery cell string welding machine provided in the embodiment of the present application completes the loading of soldering ribbons and battery cells through soldering ribbon feeding devices and battery cell feeding devices, completes the conveying of battery cells and soldering ribbons through a conveying device, completes the welding of battery strings through a welding device, and the welding device ensures that the soldering ribbons and battery cells are heated uniformly and stably during string welding, thereby improving the consistency of welding between battery strings and soldering ribbons.
[0084] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present utility model according to the specific circumstances.
[0085] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "upper", "lower", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the present utility model.
[0086] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.
[0087] Although multiple embodiments of the utility model have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may think of many changes, modifications and alternatives without departing from the idea and spirit of the utility model. It should be understood that in the process of practicing the utility model, various alternatives to the embodiments of the utility model described herein may be adopted. The attached claims are intended to define the scope of protection of the utility model, and therefore cover equivalents or alternatives within the scope of these claims.
Claims
1. A welding device, characterized in that: include: A welding lamp board is arranged in the battery string welding area, wherein the welding lamp board comprises a plurality of welding lamp modules with independent welding powers, and each welding lamp module is arranged with lamp beads.
2. The welding device according to claim 1, characterized in that: The arrangement of the lamp beads includes: The lamp beads are distributed at a first density in the central area of the welding lamp module, and are distributed at a second density at the periphery of the central area of the welding lamp module; and / or, the lamp beads in the central area of the welding lamp module have emitted light of a first wavelength, and the lamp beads at the periphery of the central area of the welding lamp module have emitted light of a second wavelength.
3. The welding device according to claim 2, characterized in that: The second density is greater than the first density, and the second wavelength is greater than the first wavelength.
4. The welding device according to claim 1, characterized in that: The lamp beads on each welding lamp module are evenly arranged, and the switching time of each welding lamp module is controlled independently of each other.
5. The welding device according to claim 1, characterized in that: The lamp beads are infrared lamp beads, and the infrared lamp beads are integrated with lenses. The divergence angles of the lenses of all infrared lamp beads cover the battery string welding area.
6. The welding device according to claim 1, characterized in that: The lamp beads are infrared lamp beads, and the infrared lamp beads are integrated with lenses with a divergence angle of 5-120 degrees.
7. The welding device according to claim 1, characterized in that: The welding device further comprises a temperature measuring component, which is arranged on the welding lamp board and is used to detect the temperature of the welding lamp module.
8. The welding device according to claim 1, characterized in that: The welding device further comprises a cooling component, and the cooling component is arranged on a surface of the welding lamp board away from the lamp beads.
9. The welding device according to claim 8, characterized in that: The cooling component includes a body, a first inlet and a first outlet arranged on the body, and a plurality of cooling channels arranged inside the body and connected to the first inlet and the first outlet, wherein the plurality of cooling channels are distributed in parallel inside the body.
10. The welding device according to claim 8, characterized in that A heat conductive material is filled between the cooling component and the welding lamp board.
11. The welding device according to claim 8, characterized in that: The cooling component further includes an adjusting structure, and the adjusting structure is used to adjust the flow rate of the cooling medium in the cooling component.
12. The welding device according to claim 1, characterized in that: The welding device further comprises a box body, the welding lamp panels are all arranged in the box body, and a shading plate for shielding the emitted light of the lamp beads is arranged in the box body along the outer circumference of the welding lamp panels.
13. The welding device according to claim 12, characterized in that: The box body includes an upper box body located above the battery string welding area and provided with the welding light board, and a lower box body located below the battery string welding area and provided with the shading plate. The upper box body and the lower box body cooperate to form a closed space, and the closed space has a second inlet and a second outlet for the passage of the parts to be welded.
14. The welding device according to claim 1, characterized in that A protective glass is provided below the welding lamp panel.
15. The welding device according to claim 14, characterized in that The welding device further comprises a ventilation component, wherein the ventilation component is communicated with the space between the welding lamp board and the protective glass.
16. A battery cell string welding machine, characterized in that: The cell string welding machine comprises a welding device as described in any one of claims 1 to 15, a cell feeding device, a welding strip feeding device, and a conveying device; The battery cell loading device and the solder strip loading device stack the battery cells and solder strips onto the conveying device, the conveying device conveys the stacked solder strips and battery cells to the welding device, and the welding device welds the solder strips and battery cells into a battery string.