A battery piece interconnection piece forming device

Abstract

The application belongs to the technical field of satellite solar cell assembly, and provides a cell interconnection sheet forming device, which comprises an upper die, a lower die and a supporting assembly. The application designs a special cell interconnection sheet stamping device for the cell of a solar cell array, and designs a special groove module and a convex groove module to finely stamp the interconnection sheet. Considering the accurate positioning of the cell, the application designs a cell positioning rod to accurately position the cell. However, the interconnection sheet has a stretching force during forming. In order to avoid the stress on the root of the interconnection sheet, the application designs a top rod. During forming, the top rod is pressed downward, the positioning rod is moved downward, the movement of the cell is released, the interconnection sheet is accurately formed, and deformation is avoided. When the forming is completed, the positioning rod is lifted, the edge of the cell is lifted, the mold is separated, and the cell is smoothly removed. The whole process achieves the purposes of accurate positioning, accurate forming and convenient operation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of satellite solar cell assembly, and particularly relates to a cell interconnection sheet forming device. BACKGROUND

[0002] Satellites need energy supply for long-term on-orbit operation. At present, satellites at home and abroad are all supplied with energy by solar cell arrays receiving sunlight conversion into electrons to ensure normal operation of the satellites.

[0003] The solar cell array is a core component of the satellite, and its reliability is related to the service life of the satellite. The solar cell array is composed of several solar wings, each of which is formed by bonding a plurality of solar cell sheets in series to a substrate. Each cell sheet has the function of receiving photons and converting them into electric energy. The quality of the cell sheet is related to the overall performance.

[0004] The cell sheet body material is silicon or gallium arsenide, which has the characteristics of high temperature resistance and aging resistance. The surface is covered with grid lines, which have the function of receiving photons. The cell sheet is welded with a pure silver interconnection sheet of about 0.03mm on one side, which is welded with adjacent cell sheets to form a whole string. Since the surface temperature of the solar cell array in outer space is cyclically converted between +100 and -100 degrees under the action of sunlight, the interconnection sheet is damaged very much, and it is easy to break if not handled properly.

[0005] The interconnection sheet is made of pure silver, which has good flexibility and can bend and stretch with the change of the environment. In order to resist temperature changes, the interconnection sheet usually has a stress release bend.

[0006] The stress release bend is usually designed in the shape of omega bend, which can avoid stretching stress when overheating expands. However, for a cell sheet with a thickness of only 0.5mm, the forming height cannot exceed 0.5mm. The distance between the cell sheets is only 1mm, and the omega has two radii and a diameter in the 1mm space.

[0007] The interconnection sheet is made of pure silver with a thickness of 0.03mm, which is relatively soft and suitable for bending, but the bending angle must be circularly transitioned. Through calculation, the circular arc radius cannot be less than 0.1mm, so several bends must be formed in the 1mm space.

[0008] The traditional stamping forming die basically cannot realize the above requirements, and a special forming device needs to be designed. SUMMARY

[0009] In order to solve the problems in the background art, the application provides a cell interconnection sheet forming device, which comprises an upper die, a lower die, a support assembly, a cell sheet with an interconnection sheet installed on one side, and a guide rod. The upper die comprises a detachably connected S upper substrate and an S lower substrate. The S lower substrate is provided with a groove module, and the bottom side of the groove module is provided with a groove.

[0010] The lower mold comprises detachably connected X upper substrate and X lower substrate; a convex groove module is installed on the X upper substrate, and a convex die matching the shape of the concave groove is arranged on the top side of the convex groove module; and the battery piece is installed on the convex groove module;

[0011] The support assembly comprises a base and a gas cylinder installed on the base; and the lower mold is fixedly connected to the base;

[0012] The guide rod is fixedly connected to the upper mold at the top, is slidingly connected to the lower mold at the middle, and is connected to the gas cylinder at the bottom; the gas cylinder drives the upper mold to move downward through the guide rod, and the stamping and forming of the interconnection piece is completed by the cooperation of the concave groove and the convex die.

[0013] A top rod is installed in the upper mold, the S upper substrate is provided with a blind hole, a through top rod hole is arranged on the side of the concave groove module close to the concave groove, the top rod is installed in the blind hole at the top and passes out of the top rod hole at the bottom; a positioning rod guide hole corresponding to the position of the top rod hole is arranged on the side of the convex groove module close to the convex die, and a battery piece positioning rod is installed in the positioning rod guide hole; a limiting spring is arranged at the bottom of the battery piece positioning rod, and the limiting spring is fixed in the positioning rod guide hole through a spring plug; the top of the battery piece positioning rod is higher than the upper surface of the convex groove module, and when the concave groove module is stamped downward, the top rod presses the battery piece positioning rod downward, so that the top of the battery piece positioning rod is flush with the upper surface of the convex groove module.

[0014] In the preferred scheme, the thickness of the battery piece is 0.5 mm, and the thickness of the interconnection piece is 0.03 mm.

[0015] In the preferred scheme, the S upper substrate is in the shape of 8, and guide holes are arranged at four corners; a stepped through hole is arranged on the S upper substrate, used for installing and fixing the S lower substrate; a center through hole is arranged at the center position, and the guide rod is fixedly connected to the center through hole;

[0016] The S lower substrate is in the same shape as the S upper substrate, bearing guide sleeves are installed at four corner portions, and the top of the bearing guide sleeve is installed in the guide hole; an upper die square groove hole is arranged in the S lower substrate, and the concave groove module is transitionally and fitly installed in the upper die square groove hole; a stepped hole is arranged at the side, and the stepped hole and the stepped through hole of the S upper substrate are connected through a bolt, so as to realize the fastening connection of the S upper substrate and the S lower substrate.

[0017] In the preferred scheme, the X upper substrate is in the same shape as the upper mold, bearing inverted rod holes are arranged at four corners; a lower die square groove hole is arranged at the middle position, and the convex groove module is transitionally and fitly installed in the lower die square groove hole; a gas cylinder guide rod hole is arranged at the center position, and the guide rod is slidingly connected to the gas cylinder guide rod hole; a fixed stepped hole is arranged on the X upper substrate, and the fixed stepped hole and the X lower substrate are connected and fixed through a bolt;

[0018] Bearing guide rods are installed at four corners of the X lower substrate, and the top of the bearing guide rod is connected to the bearing inverted rod hole of the X upper substrate.

[0019] In the preferred scheme, the base is further provided with an operation platform electrically connected with the cylinder.

[0020] The present application has the following advantages:

[0021] The present application designs a special cell interconnection sheet stamping device for the cell sheet of the solar cell array, and designs a special groove module and a convex groove module to finely stamp the interconnection sheet.

[0022] However, the interconnection sheet has a stretching force during forming, in order to avoid stress on the root of the interconnection sheet, the present application designs a top rod, which is pressed down during forming, so that the positioning rod moves downward and removes the movement restriction of the cell sheet, so that the interconnection sheet is accurately formed and deformation is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is an overall structure explosion diagram of the present application;

[0024] Figure 2 is a schematic diagram of the cell sheet structure;

[0025] Figure 3 is a schematic diagram of the interconnection sheet structure;

[0026] Figure 4 is a schematic diagram of the overall structure of the present application;

[0027] Figure 5 is an upper mold structure explosion diagram;

[0028] Figure 6 is a schematic diagram of the upper mold structure;

[0029] Figure 7 is a schematic diagram of the S upper substrate structure;

[0030] Figure 8 is a schematic diagram of the S lower substrate structure;

[0031] Figure 9 is a schematic diagram of the groove module structure;

[0032] Figure 10 is a lower mold structure explosion diagram;

[0033] Figure 11 is a schematic diagram of the X upper substrate structure;

[0034] Figure 12 is a schematic diagram of the convex groove module structure;

[0035] Figure 13 is the sectional view of the substrate and the convex groove module structure on X.

[0036] Reference numerals in the drawings:

[0037] 1, upper mold; 11, S upper substrate; 12, S lower substrate; 13, guide sleeve; 14, ejector rod; 15, groove module; 16, bolt; 111, guide hole; 112, stepped through hole; 113, blind hole; 114, center through hole; 121, upper mold square groove hole; 151, ejector rod hole; 152, groove; 2, lower mold; 21, X upper substrate; 22, X lower substrate; 23, battery piece positioning rod; 24, convex groove module; 25, limiting spring; 26, spring plug; 27, bearing guide rod; 211, bearing inverted rod hole; 212, lower mold square groove hole; 213, cylinder guide rod hole; 241, positioning rod guide hole; 242, convex mold; 3, support assembly; 31, base; 32, operation table; 33, cylinder; 4, battery piece; 41, interconnection sheet; 5, guide rod. DETAILED DESCRIPTION

[0038] The technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. In addition, the forms of each structure described in the following embodiments are only examples, and the present application is not limited to each structure described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] With reference to Figures 1-13 , the battery piece interconnection sheet forming device of the present application comprises an upper mold 1, a lower mold 2, a support assembly 3, a battery piece 4 having an interconnection sheet 41 installed on one side, and a guide rod 5. The upper mold 1 comprises detachably connected S upper and lower substrates 11 and 12. The S lower substrate 12 is provided with a groove module 15 installed thereon, and the bottom side of the groove module 15 is provided with a groove 152. In a preferred embodiment, the S upper substrate is in the shape of an 8, and the four corners are provided with guide holes 111. The S upper substrate is provided with a stepped through hole 112 for mounting and fixing the S lower substrate 12, and a center through hole 114 is provided at the center position, and the guide rod 5 is fixedly connected in the center through hole 114.

[0040] The S lower substrate 12 is in the same shape as the S upper substrate, and bearing guide sleeves 13 are installed at the four corners, and the top of the bearing guide sleeve 13 is installed in the guide hole 111. The S lower substrate 12 is provided with an upper mold square groove hole 121, and the groove module 15 is transitionally fitted and installed in the upper mold square groove hole 121. The side is provided with a stepped hole, and the stepped hole and the stepped through hole 112 of the S upper substrate are connected by a bolt 16 to realize the fastening connection of the S upper and lower substrates 12.

[0041] The lower mold 2 comprises detachably connected X upper base plate 21 and X lower base plate 22; the X upper base plate 21 is provided with a convex groove module 24, and the top side of the convex groove module 24 is provided with a convex die 242 matched with the shape of the concave groove 152; the battery piece 4 is installed on the convex groove module 24; in the preferred scheme, the shape of the X upper base plate 21 is consistent with the upper mold 1, and bearing inverted rod holes 211 are arranged at four corners; a lower mold square groove hole 212 is arranged at the middle position, and the convex groove module 24 is transitionally and fitly installed in the lower mold square groove hole 212; a cylinder guide rod hole 213 is arranged at the center position, and the guide rod 5 is slidingly connected in the cylinder guide rod hole 213; a fixed stepped hole is arranged on the X upper base plate 21, and the X lower base plate 22 is connected and fixed through the fixed stepped hole and the bolt 16; bearing guide rods 27 are arranged at four corners of the X lower base plate 22, and the top of the bearing guide rod 27 is connected in the bearing inverted rod hole 211 of the X upper base plate 21.

[0042] The support assembly 3 comprises a base 31 and a cylinder 33 installed on the base 31; the lower mold 2 is fixedly connected on the base 31; the base 31 is further provided with an operation table 32 electrically connected with the cylinder 33 and used for controlling the action of the cylinder 33.

[0043] The upper mold 1 is provided with a top rod 14, the S upper base plate is provided with a blind hole 113, a through top rod hole 151 is arranged on one side of the convex groove module 15 close to the concave groove 152, the top rod 14 is installed in the blind hole 113 and passes out from the bottom of the top rod hole 151; a positioning rod guide hole 241 corresponding to the position of the top rod hole 151 is arranged on one side of the convex groove module 24 close to the convex die 242, and a battery piece positioning rod 23 is installed in the positioning rod guide hole 241; a limiting spring 25 is arranged at the bottom of the battery piece positioning rod 23, and the limiting spring 25 is fixed in the positioning rod guide hole 241 through a spring plug 26; the top position of the battery piece positioning rod 23 is higher than the upper surface of the convex groove module 24, when the concave groove module 15 is downwardly stamped, the top rod 14 presses down the battery piece positioning rod 23, so that the top position of the battery piece positioning rod 23 is flush with the upper surface of the convex groove module 24.

[0044] The guide rod 5 is fixedly connected at the top to the upper mold 1, slidingly connected at the middle to the lower mold 2, and connected at the bottom to the cylinder 33; the cylinder 33 drives the upper mold 1 downwardly through the guide rod 5, and the stamping and forming of the interconnection piece 41 is completed through the cooperation of the concave groove 152 and the convex die 242.

[0045] The battery piece 4 is made of silicon or gallium arsenide, and has the characteristics of high temperature resistance and aging resistance. The surface is covered with grid lines, and has the function of receiving photons. One end of the battery piece 4 is welded with a 0.03mm pure silver interconnection piece 41, which is welded with adjacent battery pieces 4 to form a whole string. Since the surface temperature is cyclically converted between +100 to -100 degrees under the sunlight in outer space, the interconnection piece 41 is damaged very much, and is easy to be broken if not handled properly.

[0046] The interconnecting sheet 41 is made of pure silver and has good flexibility, and can be bent and stretched with the change of environment. In order to resist temperature change, the interconnecting sheet 41 usually has a stress release bend.

[0047] The stress release bend is usually designed in the shape of Ω bend, which can avoid tension stress in the case of overheat expansion. However, for the battery sheet 4 with a thickness of only 0.5 mm, the forming height cannot exceed 0.5 mm. The distance between the battery sheet 4 and the battery sheet 4 is only 1 mm, and the Ω forming between 1 mm has two radii and a diameter, as shown in the following figure.

[0048] The interconnecting sheet 41 is made of pure silver and has a thickness of 0.03 mm, which is relatively soft and suitable for bending, but the bending angle must be circularly arc transition. Through calculation, the circular arc radius cannot be less than 0.1 mm, so several bends are formed between 1 mm.

[0049] At present, the interconnecting sheet 41 on the battery sheet 4 has been welded, and the extension length is a certain value, which is important for the safety of forming at the edge of the fragile battery sheet 4.

[0050] The thickness of the battery sheet 4 is only 0.5 mm, and the distance between the battery sheet 4 and the sheet is 1 mm. Due to the small stress bend and the soft silver sheet, the tooling is designed by using upper and lower dies for stamping; the alignment accuracy is high, the error is small, and the transmission guide sleeve 13 is imported. However, the overall structure needs to meet the forming mode of the battery sheet 4, so the overall structure is a multi-layer block to ensure stability.

[0051] Example 1,

[0052] This embodiment focuses on the important structure of the battery sheet 4 interconnecting sheet 41 forming device: the groove module 15 is an important component of the battery sheet 4 interconnecting sheet 41 forming device. Since the distance from the edge of the battery sheet 4 is 1 mm, the Ω bend is formed, so the groove 152 is made at the appropriate position of the die edge, and the shape and surface roughness meet the requirements. In addition, two top rod holes 151 are designed at the appropriate position of the groove 152 edge, which is convenient for installing the top rod 14.

[0053] The top rod 14: the function of the top rod 14 is to move away the positioning rod, so the top rod 14 is fixed and stable. The shape of the top rod 14 is a stepped rod, the thick end is stretched in the upper base plate blind hole 113, and the thin end is exposed through the through hole of the groove module 15.

[0054] The convex groove module 24: the convex groove module 24 corresponds to the groove module 15, and the centering accuracy is high, which is not allowed to have deviation, and all guides must meet the centering of the groove and convex module 242 blocks.

[0055] Cell positioning rod 23: The cell positioning rod 23 is a movable part. Considering the tensile force during the molding of the interconnect piece 41 on the cell 4, to avoid stress on the root of the interconnect piece 41, the positioning rod is moved downwards during molding, giving the cell 4 a natural tendency to move. After molding is complete, the positioning rod is raised, which pushes up the edge of the cell 4, allowing it to disengage from the mold and move out smoothly. A spring and screw plug are provided at the bottom of the cell positioning rod 23 to achieve reset.

[0056] In use, the first step is to inspect the appearance of the battery cell 4 to ensure that the interconnecting sheet 41 is not bent. It is then placed onto the protrusion module 24 of the lower mold 2 of the battery cell 4 interconnecting sheet 41 forming device. Considering the accurate positioning of the battery cell 4, this invention incorporates a battery cell positioning rod 23. The battery cell 4 is gently pushed to the position of the positioning rod 23. The positioning rod 23 and the interconnecting sheet 41 are staggered, with the interconnecting sheet 41 extending beyond the positioning rod 23 into the stamping area. During forming, the interconnecting sheet 41 experiences tensile force; to avoid tension during the forming process... The base of the battery cell 41 is subjected to force. This invention incorporates a push rod 14. During stamping, the cylinder 33 is controlled by the operating table 32 to press down the push rod 14. The battery cell positioning rod 23 moves downward under the push of the push rod 14, releasing the movement restriction of the battery cell 4. This allows the top of the positioning rod 23 to align with the upper surface of the protrusion module 24. Under the combined action of the groove 152 and the punch 242, the interconnecting piece 41 is accurately formed into an approximately Ω shape. During stamping, the release of the movement restriction of the battery cell 4 prevents deformation of both the battery cell 4 and the interconnecting piece 41. After forming, the positioning rod 23 lifts up, precisely lifting the edge of the battery cell 4, allowing it to disengage from the mold and be removed using special tweezers. The entire process is precise, accurate, and easy to operate.

[0057] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0058] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0059] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery cell interconnect forming apparatus, characterized in that, It includes an upper mold (1), a lower mold (2), a support assembly (3), a battery cell (4) with an interconnecting piece (41) mounted on one side, and a guide rod (5), wherein: The upper mold (1) includes an S upper substrate (11) and an S lower substrate (12) that can be detachably connected; a groove module (15) is installed on the S lower substrate (12), and a groove (152) is provided on one side of the bottom of the groove module (15); The lower mold (2) includes an X upper substrate (21) and an X lower substrate (22) that can be detachably connected; a groove module (24) is installed on the X upper substrate (21), and a punch (242) matching the shape of the groove (152) is provided on one side of the top of the groove module (24); the battery cell (4) is installed on the groove module (24); The support assembly (3) includes a base (31) and a cylinder (33) mounted on the base (31); the lower mold (2) is fixedly connected to the base (31); The top of the guide rod (5) is fixedly connected to the upper mold (1), the middle part is slidably connected to the lower mold (2), and the bottom is connected to the cylinder (33). The cylinder (33) drives the upper mold (1) to move downward through the guide rod (5). The groove (152) and the punch (242) cooperate to complete the stamping of the interconnect piece (41). The upper mold (1) is equipped with a push rod (14), the upper substrate (11) of S is provided with a blind hole (113), the groove module (15) is provided with a through push rod hole (151) on the side near the groove (152), the top of the push rod (14) is installed in the blind hole (113), and the bottom protrudes from the push rod hole (151); the punch module (24) is provided with a positioning rod guide hole (241) on the side near the punch (242) corresponding to the position of the push rod hole (151), the positioning rod guide hole (241) is provided with a through push rod hole (151) on the side near the punch (242). 41) A battery cell positioning rod (23) is installed in the middle; a limit spring (25) is provided at the bottom of the battery cell positioning rod (23), and the limit spring (25) is fixed in the positioning rod guide hole (241) through the spring plug (26); the top position of the battery cell positioning rod (23) is higher than the upper surface of the groove module (24). When the groove module (15) presses down, the top rod (14) presses down the battery cell positioning rod (23) so that the top position of the battery cell positioning rod (23) is flush with the upper surface of the groove module (24).

2. The battery cell interconnect forming apparatus according to claim 1, characterized in that: The thickness of the battery cell (4) is 0.5 mm, and the thickness of the interconnecting sheet (41) is 0.03 mm.

3. The battery cell interconnect forming apparatus according to claim 1, characterized in that: The upper substrate (11) of S is in the shape of an 8, with guide holes (111) at the four corners; a stepped through hole (112) is opened on the upper substrate (11) of S for mounting and fixing the lower substrate (12) of S; a central through hole (114) is opened at the center position, and the guide rod (5) is fixedly connected in the central through hole (114). The shape of the lower substrate (12) is the same as that of the upper substrate (11). Bearing guide sleeves (13) are installed at the four corners, and the top of the bearing guide sleeves (13) is installed in the guide hole (111). The lower substrate (12) has an upper mold square slot hole (121) and the groove module (15) is fitted into the upper mold square slot hole (121). The side has a stepped hole, and the stepped hole is connected to the stepped through hole (112) of the upper substrate (11) by bolts (16) to realize the fast connection between the upper substrate (11) and the lower substrate (12).

4. The battery cell interconnect forming apparatus according to claim 3, characterized in that: The upper substrate (21) of X has the same shape as the upper mold (1), and bearing rod holes (211) are provided at the four corners; the middle part has a square slot hole (212) for installing the lower mold, and the protruding module (24) is fitted with the square slot hole (212) of the lower mold; there is a cylinder guide rod hole (213) at the center, and the guide rod (5) is slidably connected in the cylinder guide rod hole (213); a fixed stepped hole is provided on the upper substrate (21), and it is connected and fixed to the lower substrate (22) of X through the fixed stepped hole and bolts; Bearing guide rods (27) are installed at the four corners of the X-bottom substrate (22), and the top of the bearing guide rods (27) is connected to the bearing rod hole (211) of the X-top substrate (21).

5. The battery cell interconnect forming apparatus according to claim 3, characterized in that: An operating table (32) electrically connected to the cylinder (33) is also installed on the base (31).

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