Lamp tube structure for welding battery piece

Abstract

The utility model discloses a lamp tube structure for battery piece welding, and belongs to the technical field of battery piece welding. A lamp tube structure for welding a battery piece comprises a lamp box located at the upper end of the battery piece, and an infrared lamp tube is connected in the lamp box in a coupling mode. The irradiation direction of the infrared lamp tube faces the battery piece all the time, and the infrared lamp tube is used for condensing light and irradiating the welded battery piece; a light reflecting coating is arranged on the inner wall of the infrared lamp tube, the perimeter of the light reflecting coating is smaller than that of the inner wall of the infrared lamp tube, and the perimeter of the light reflecting coating is larger than half of that of the inner wall of the infrared lamp tube. The head end and the tail end of the reflective coating are provided with light condensation ports which are always arranged towards the direction of the battery piece. Small welding spots can be formed, the retraction of the welding strip is reduced, and the bending degree of a battery piece is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery piece welding technical field, more specifically, relate to a lamp tube structure for battery piece welding. BACKGROUND

[0002] The welding strip is the important structure of the photovoltaic module, and the photovoltaic module is connected in series through the welding strip, and the welding strip plays the role of collecting current. In the traditional technology, laser welding or tunnel type lamp box is generally used for welding, and the welding strip is welded to the soldering pad point of the battery piece.

[0003] In the prior art, the light collecting form of the infrared lamp tube is mostly the light reflector arranged on the outside, the light reflecting plate or the light reflecting coating half-enclosed in the inner layer of the infrared lamp tube. The light collecting part of the above welding method is relatively wide, so as to perform large-area welding on the welding strip. The overall welding strip is expanded due to heat, and after the welding is completed, the welding strip is cooled and retracted with the decrease of temperature, which is easy to cause the bending deformation of the battery piece, and increases the risk of the battery piece cracking during the subsequent processing. UTILITY MODEL CONTENTS

[0004] The utility model wants to solve the technical problem in providing a lamp tube structure for battery piece welding, which can form small welding points, reduce the retraction of the welding strip, and reduce the bending degree of the battery piece.

[0005] The lamp tube structure for battery piece welding of the utility model, including the lamp box at the upper end of the battery piece, the infrared lamp tube is coupled in the lamp box, the irradiation direction of the infrared lamp tube is always arranged towards the battery piece, and the infrared lamp tube is used for light collecting and irradiating the battery piece for welding, the inner wall of the lamp tube of the infrared lamp tube is provided with the light reflecting coating, the setting circumference of the light reflecting coating is less than the circumference of the inner wall of the infrared lamp tube, and the setting circumference of the light reflecting coating is more than half of the circumference of the inner wall of the infrared lamp tube, the light collecting port is formed at the two ends of the light reflecting coating, and the light collecting port is always arranged towards the direction of the battery piece.

[0006] As a further improvement of the utility model, the upper end of the battery piece is further provided with a welding strip, and the welding strip is in abutment with the battery piece, the upper end of the welding strip is provided with a pressing needle tool, a plurality of through holes are uniformly arranged on the surface of the pressing needle tool, the pressing needle tool is suspended on the upper end of the welding strip, and the direction of the light collecting port of the infrared lamp tube is aligned with the plurality of through holes of the pressing needle tool.

[0007] As a further improvement of the utility model, the lamp box comprises lamp tube fixing pieces uniformly arranged on the upper end of the pressing needle tool, the lamp tube fixing pieces are correspondingly arranged at the plurality of through holes of the pressing needle tool, the infrared lamp tube is arranged in the lamp tube fixing piece, and the infrared lamp tube is in abutment with the inner wall of the lamp tube fixing piece.

[0008] As a further improvement of the present application, the lower end of the solder strip is provided with a plurality of tin paste, the plurality of tin paste is located between the solder strip and the battery piece or the upper end surface of the solder strip; the light collecting port of the plurality of infrared lamp tubes corresponds to the plurality of tin paste in the irradiation direction, so as to form welding points on the solder strip.

[0009] As a further improvement of the present application, the tin paste is in a semi-solid or liquid state, and the shape of the tin paste is raised; the tin paste is placed in the middle of the plurality of adjacent welding points or on the plurality of welding points.

[0010] As a further improvement of the present application, at least one end side of the lamp box is provided with a plurality of uniformly arranged fans, and the wind direction of the fan is always directed towards the infrared lamp tube and the solder strip.

[0011] As a further improvement of the present application, the corresponding welding points on the plurality of solder strips are located in the same direction, and the welding points in the same direction correspond to the infrared lamp tubes in the same direction in sequence; at least one column or one row of the plurality of infrared lamp tubes is a group.

[0012] Compared with the prior art, the present application has the following advantages:

[0013] Compared with the prior art, the present application changes the placement mode and solid-liquid form of the tin paste. Compared with the prior art, the placement mode of the tin paste is from the middle to the two sides, and the tin paste is in a semi-solid state. The advantages of this setting are that the extension is effectively improved, and the solder strip is not easy to retract. Moreover, the present application improves the light collecting form in the infrared lamp tube. The original infrared lamp tube reflection coating half section and the reflection cover / reflection plate type light collecting form are adjusted. The present application maintains the setting circumference of the reflection coating to be greater than half of the inner wall circumference, so as to reduce the size of the light collecting port, concentrate the heat generated by the infrared lamp tube, and accurately correspond to the tin paste position, so as to realize the heating of the tin paste to form welding points. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic diagram of the plane structure of the overall tooling of the present application;

[0015] Figure 2 It is a schematic diagram of the plane structure of the infrared lamp tube of the present application;

[0016] Figure 3 It is a schematic diagram of the structure of the tin paste in the unwelded state of the present application;

[0017] Figure 4 It is a schematic diagram of the structure of the tin paste in the welded state of the present application;

[0018] Figure 5 It is a schematic diagram of the battery piece welding method of the present application;

[0019] Figure 6 It is the structure diagram of fan position in the second scheme of the utility model.

[0020] Mark explanation in the drawing:

[0021] Battery piece 1, solder strip 2, tin paste 21, solder joint 22 pressing needle tooling 3, light box 4, lamp tube fixing part 41, infrared lamp tube 42, reflective coating 421, fan 5. Specific implementation

[0022] Specific embodiment one: please refer to Figures 1-5 A kind of lamp tube structure for battery piece welding, including the battery piece 1 of setting in tooling bottom, the upper end of the battery piece 1 is provided with solder strip 2, solder strip 2 and battery piece 1 are mutually abutted.

[0023] Multiple tin pastes 21 are clamped between solder strip 2 and battery piece 1, the tin paste 21 is semi-solid, the shape of tin paste 21 is raised, so that solder joint 22 is formed after welding is completed.As shown in Figure 3 Solder strip 2 is pressed on tin paste 21, tin paste 21 is placed from middle to both sides, solder strip 2 is raised with the contour of tin paste 21.As shown in Figure 4 When welding is completed, tin paste 21 is dissolved from middle to both sides, tin paste 21 is dissolved in the middle and both sides of solder strip 2, so that solder strip 2 is straightened and extends to both sides.

[0024] The upper end of solder strip 2 is provided with pressing needle tooling 3, the surface of pressing needle tooling 3 is uniformly provided with multiple through holes penetrating wall body.The pressing needle tooling 3 is suspended on the upper end of solder strip 2, the upper end of pressing needle tooling 3 is provided with light box 4, and light box 4 and pressing needle tooling 3 are mutually abutted.The light box 4 includes lamp tube fixing part 41 uniformly placed on the upper end of pressing needle tooling 3, and the lamp tube fixing part 41 is correspondingly provided with multiple through holes of pressing needle tooling 3.

[0025] The lamp tube fixing part 41 is provided with infrared lamp tube 42, the infrared lamp tube 42 is abutted to the inner wall of lamp tube fixing part 41, and the light condensing irradiation direction of infrared lamp tube 42 is aligned with multiple through holes of pressing needle tooling 3, so that infrared lamp tube 42 condenses and irradiates on tin paste 21 and solder strip 2 to form solder joint 22.The inner side of lamp wall of infrared lamp tube 42 is provided with reflective coating 421, the setting circumference of reflective coating 421 is less than the circumference of inner wall of infrared lamp tube 42, and the setting circumference of reflective coating 421 is greater than half of the circumference of inner wall of infrared lamp tube 42.Reflection coating 421 forms light condensing port between two ends, and the direction of light condensing port is always towards the through hole of pressing needle tooling 3, so that the direction of light condensing port is always irradiated through the through hole and irradiated on the tin paste 21 part.

[0026] The upper end of the lamp box 4 is also provided with a plurality of uniformly arranged fans 5, the wind direction of the fan 5 is always towards the infrared lamp tube 42 and the solder strip 2, and the fan 5 is detachably connected with the upper end of the lamp box 4. The fan 5 is connected with an external driving member, so that the fan 5 has the ability of rotation.

[0027] In this embodiment 2, a plurality of solder strips 2 are included on the battery piece 1, and at least 7 solder points 22 are provided on each of the plurality of solder strips 2. Here, the solder point 22 refers to a to-be-welded point between the solder strip 2 and the battery piece 1, and the to-be-welded point can be a pad point pre-provided on the battery piece 1. Generally, the number of to-be-welded points between each of the plurality of solder strips 2 and the battery piece 1 is the same.

[0028] The welding sequence of the solder points 22 of the solder strip 2 on the battery piece 1 is illustrated as follows. The serial numbers of the solder points 22 are sequentially 1, 2, 3, 4, 5, 6, and 7 along the length direction of the solder strip 2. At the beginning of welding, the first and last ends represented as 1 and 7 are welded first; when the welding of 1 and 7 is completed at the same time, 2 and 6 are welded again, then 3 and 5 are welded, and finally 4 is welded. The welding is performed from the outermost ends of the two ends first, and then the adjacent inner sides are welded in this direction, and the welding of the adjacent inner sides is sequentially performed until the middle is completed. It is represented that from the two ends to the middle, the two solder points are welded at the same time, and this welding method is a bidirectional relative aggregation welding method. When the first welding method is used, the same column solder points need to be welded at the same time, and the first welding is represented as A1, B1, C1,..., S1, A7, B7, C7,..., S7; the second welding is completed by using the welding from the two ends to the middle, and is represented as A2, B2, C2,..., S2, A6, B6, C6,..., S6; the third welding is represented as A3, B3, C3,..., S3, A5, B5, C5,..., S5; and the last welding is represented as A4, B4, C4,..., S4; which represents the welding from the two ends to the middle in the same column unit.

[0029] When the above-mentioned various welding methods are used, in order to improve the welding speed, segmented welding is adopted, the corresponding solder points 22 on the plurality of solder strips 2 are located in the same direction, the solder points 22 in the same direction correspond to the infrared lamp tubes 42 in the same direction in sequence; at least one column of the plurality of infrared lamp tubes 42 is a group; one group is one row or column of the plurality of infrared lamp tubes 42, and the remaining groups are each two rows or columns of the plurality of infrared lamp tubes 42.

[0030] In the welding process, the welding form includes separately welding the soldering points 22 and the soldering strip 2, or separately welding the soldering filler, or directly welding the soldering points 22 on the soldering strip 2 and setting the soldering filler on the soldering points 22. Preferably, the soldering points 22 adopt the soldering paste as the soldering filler. When the form of separately welding the soldering filler is adopted, the soldering paste is located between the two spaced apart soldering points 22, the soldering paste is not semi-solid in this form, and the shape of the soldering paste is raised; after the soldering strip is heated, the soldering paste on the soldering strip is subjected to tin dissolution, the dissolved tin flows to the two soldering points 22, and after cooling and solidification, tin beads are formed to wrap the soldering strip 2 and cover the soldering points 22. When the form of directly welding the soldering points 22 on the soldering strip 2 and setting the soldering filler on the soldering points 22 is adopted, the soldering paste is located on the corresponding soldering points 22, and in this form, the soldering paste is liquid soldering paste to directly wrap the soldering strip 2 and cover the soldering points 22.

[0031] Working principle:

[0032] The utility model discloses a total length of the reflective coating in the inside of infrared lamp tube is increased, so that the light collecting port formed between the two ends of the reflective coating is reduced, and the light collecting effect is increased. The light collecting reflection of the infrared lamp tube is directed to the direction of the soldering strip and the soldering paste, the soldering paste is dissolved to form soldering points after heating, so that the soldering points formed on the soldering strip are welded with the battery piece. The welding mode of the battery piece is represented as welding from the two sides of the soldering strip to the middle part of the soldering strip.

[0033] Specific embodiment two: please refer to Figure 6 A lamp structure for welding a battery piece, which is different from the specific embodiment one, a plurality of uniformly arranged fans 5 are arranged on the lower end tool of the battery piece 1, the wind direction of the fan 5 is always directed to the infrared lamp tube 42 and the soldering strip 2, and the fan 5 and the lower end tool of the battery piece 1 are detachably connected. The fan 5 is connected with an external driving member, so that the fan 5 has the ability of rotation.

[0034] Working principle:

[0035] The fan is arranged at the lower end of the battery piece, and the infrared lamp tube and the soldering strip are cooled from bottom to top, so as to reduce the problems of welding breakage of the soldering points of the soldering strip welded by the infrared lamp tube.

Claims

1. A lamp structure for battery tab welding, characterized by: The lamp box (4) is arranged at the upper end of the battery piece, and the infrared lamp tube (42) is coupled and connected in the lamp box (4); the irradiation direction of the infrared lamp tube (42) is always directed to the battery piece, and the infrared lamp tube (42) is used for spotlighting and irradiating the welded battery piece; the inner wall of the lamp tube of the infrared lamp tube (42) is provided with a reflective coating (421), the setting circumference of the reflective coating (421) is smaller than the circumference of the inner wall of the infrared lamp tube (42), and the setting circumference of the reflective coating (421) is greater than half of the circumference of the inner wall of the infrared lamp tube (42); the reflective coating (421) is formed with a spotlighting opening at the two ends, and the spotlighting opening is always arranged in the direction of the battery piece.

2. The lamp structure for soldering a battery cell according to claim 1, wherein: The upper end of the battery piece is further provided with a welding strip (2), and the welding strip (2) is in abutment with the battery piece; the upper end of the welding strip (2) is provided with a pressing needle tool (3), a plurality of through holes are uniformly arranged on the surface of the pressing needle tool (3); the pressing needle tool (3) is suspended on the upper end of the welding strip (2); the direction of the spotlighting opening of the infrared lamp tube (42) is aligned with the plurality of through holes of the pressing needle tool (3).

3. The lamp structure for soldering a cell according to claim 2, wherein: The lamp box (4) comprises a lamp tube fixing piece (41) arranged at the upper end of the pressing needle tool (3), and the lamp tube fixing piece (41) is correspondingly arranged at the plurality of through holes of the pressing needle tool (3); the infrared lamp tube (42) is arranged in the lamp tube fixing piece (41), and the infrared lamp tube (42) is in abutment with the inner wall of the lamp tube fixing piece (41).

4. The lamp structure for soldering a cell according to claim 2, wherein: The lower end of the welding strip (2) is provided with a plurality of tin pastes (21), and the plurality of tin pastes (21) are arranged between the welding strip (2) and the battery piece or on the upper end surface of the welding strip (2); the spotlighting opening of the plurality of infrared lamp tubes (42) corresponds to the plurality of tin pastes (21), so as to form a plurality of welding spots (22) on the welding strip (2).

5. The lamp structure for soldering a cell according to claim 4, wherein: The tin paste (21) is in a semi-solid or liquid state, and the shape of the tin paste (21) is raised; the tin paste (21) is arranged in the middle of the plurality of adjacent welding spots (22) or on the plurality of welding spots (22).

6. The lamp structure for soldering a cell according to claim 1, wherein: At least one end side of the lamp box (4) is provided with a plurality of uniformly arranged fans (5), and the wind direction of the fan (5) is always directed to the infrared lamp tube (42) and the welding strip (2).

7. The lamp structure for soldering a cell according to claim 2, wherein: The corresponding welding spots (22) on the plurality of welding strips (2) are in the same direction, and the welding spots (22) in the same direction correspond to the infrared lamp tubes (42) in the same direction in sequence; at least one column or one row of the plurality of infrared lamp tubes (42) is a group.

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