Battery piece upper voltage crimping mechanism

Abstract

The utility model provides a battery piece up-pressing crimping mechanism, which comprises a front crimping part and a bearing table, and is characterized in that the front crimping part comprises a mounting frame, a plurality of metal wires and a plurality of pressing wires, the plurality of metal wires are arranged on the mounting frame side by side at intervals, and the plurality of pressing wires are arranged on the mounting frame side by side at intervals and press the metal wires; the bearing table is arranged below the front electrifying part and is used for bearing a battery piece, and a grid line on the back surface of the battery piece is tightly attached to a conducting strip of the bearing table; and at least one of the mounting frame and the bearing table is configured to be capable of descending or ascending towards the other one, so that the plurality of metal wires are pressed against and in contact with the front grid lines of the battery pieces, and the pressing wires downwards press the metal wires. According to the battery piece electrifying and crimping mechanism, the electrifying component is composed of the metal wire and the pressing wire, the metal wire can make contact with the multiple grid lines on the front face of the battery piece, so that the electrifying effect on the front face of the battery piece is improved, the pressing wire presses the metal wire from the upper portion, and it is ensured that the middle section of the metal wire is pressed on the battery piece.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell assembly production, and more specifically to a cell chip voltage connection mechanism. Background Art

[0002] After screen printing is performed on the battery cells, the battery cells with formed grid lines need to be optimized and processed to improve efficiency. That is, an external power supply is used to apply voltage to the battery cells and a laser is scanned on the surface of the battery cells to optimize the contact performance between the grid lines and the silicon substrate of the battery cells and improve the power generation efficiency of the battery cells.

[0003] The cell optimization process is to crimp the grid lines on the upper and lower surfaces of the cell through an upper voltage connection mechanism, then power on the cell through a power supply electrically connected to the upper voltage connection mechanism, and then perform laser scanning on the front of the powered-on cell through a laser scanning mechanism.

[0004] In order to prevent the laser from being blocked, the traditional upper voltage connection mechanism only contacts a few grid lines at the edge of the front side of the cell, which ultimately leads to poor efficiency improvement. A feasible solution is to crimp the grid lines on the front side of the cell using a number of metal wires perpendicular to the grid lines on the front side of the cell, thereby ensuring that most of the grid lines on the front side of the cell can be connected.

[0005] However, since the metal wire is long (at least longer than the length / width of the cell), the middle section of the metal wire will inevitably arch upward slightly when it is crimped to the front of the cell, which may eventually lead to a virtual connection between the middle section of the metal wire and the grid line, affecting the final optimization effect. Utility Model Content

[0006] In view of the above problems existing in the existing on-chip voltage connection mechanism of a battery, the present application provides an on-chip voltage connection mechanism of a battery, and its detailed technical solution is as follows:

[0007] A voltage connection mechanism on a battery cell, the voltage connection mechanism on the battery cell comprising a front side crimping portion and a carrier, wherein:

[0008] The front crimping part includes a mounting frame, a plurality of metal wires and a plurality of pressing wires, wherein the plurality of metal wires are arranged side by side and at intervals on the mounting frame, and the plurality of pressing wires are arranged side by side and at intervals on the mounting frame, wherein the pressing wires are located above the metal wires and press the metal wires;

[0009] The carrier is arranged below the front upper electrical part, and is used to carry the battery cell, and the grid lines on the back of the battery cell are closely attached to the conductive sheet of the carrier;

[0010] At least one of the mounting frame and the carrier is configured to be able to descend or ascend toward the other, so that the plurality of metal wires are pressed against and contacted with the front grid lines of the battery cell, and the plurality of pressing wires press the plurality of metal wires downward.

[0011] The voltage connection mechanism on the battery cell provided by the present application has a power-on component of a front pressure connection portion that is a plurality of metal wires that span the battery cell, and the metal wires can contact the majority of grid lines on the front of the battery cell, thereby improving the power-on effect of the power supply on the front of the electric chip. In addition, the back of the battery cell is tightly attached to the conductive sheet on the carrier, so that it can be ensured that the grid lines on the back of the battery cell form a stable contact with the conductive sheet, thereby improving the power-on effect of the power supply on the back of the electric chip. In particular, the voltage connection mechanism on the battery cell of the present application is also provided with a pressing wire, which can press the metal wire from above, thereby ensuring that the middle section of the metal wire is pressed against the front of the battery cell, preventing the middle section of the metal wire from warping up and detaching from the grid line.

[0012] In some embodiments, the pressed wires are all arranged perpendicular to the metal wire; or, at least part of the pressed wires are arranged perpendicular to the metal wire; or, at least two groups of pressed wires symmetrically press the metal wire, and each group of pressed wires includes at least one pressed wire.

[0013] Make sure the wire press can press the middle section of the wire tightly against the front side of the battery cell.

[0014] In some embodiments, the front crimping portion also includes a first support row and a second support row, wherein: both ends of the first support row are respectively connected to the first ends of two opposite frames of the installation frame, and both ends of the second support row are respectively connected to the second ends of two opposite frames of the installation frame; the first end of the metal wire is connected to the first support row, and the second end of the metal wire is connected to the second support row.

[0015] The first support row and the second support row are provided to facilitate installation, maintenance and debugging of the metal wire.

[0016] In some embodiments, first fixing frames corresponding to the metal wires are arranged at intervals on the first support row, and second fixing frames corresponding to the metal wires are arranged at intervals on the second support row; the first end of the metal wire is fixed on the corresponding first fixing frame, and the second end of the metal wire is fixed on the corresponding second fixing frame.

[0017] By providing the first fixing frame and the second fixing frame, the connection strength between the two ends of the metal wire and the first supporting row and the second supporting row is ensured, thereby preventing the metal wire from falling off.

[0018] In some embodiments, the first fixing frame and the second fixing frame have the same structure and are symmetrically arranged one by one, and the first fixing frame includes a first upper frame body, a first lower frame body, a first bearing, and a first I-shaped wheel, wherein: the first upper frame body is connected to the first support row, and the first lower frame body is connected to the first upper frame body; the outer ring of the first bearing is fixedly arranged on the lower frame body, the first I-shaped wheel is fixedly connected to the inner ring of the first bearing, and the first end of the metal wire is fixedly connected to the first I-shaped wheel.

[0019] By arranging the first fixing frame and the second fixing frame, it is ensured that both ends of the metal wire can be securely wound around the first fixing frame and the second fixing frame.

[0020] In some embodiments, the first lower frame is rotatably connected to the first upper frame via a rotating shaft; the first fixed frame also includes a first spring arranged in a vertical direction, the first spring is located on the side of the rotating shaft close to the second fixed frame, the upper end of the first spring abuts against the first upper frame, and the lower end of the first spring abuts against the first lower frame.

[0021] By setting the first fixing frame and the second fixing frame, the first fixing frame and the second fixing frame can pull the metal wire in opposite directions after being compressed, and finally make the metal wire tight on the front side of the battery cell, further ensuring that the metal wire can fully contact the corresponding grid line.

[0022] In some utility models, the first fixed frame also includes a roller seat, a roller, a first bolt and a second spring, wherein: the rod body of the first bolt is accommodated in the through hole at the bottom of the first lower frame body, the second spring is sleeved on the first bolt extending in the horizontal direction, the second spring is located on the first side of the first lower frame body, the first end of the second spring abuts against the nut of the second end of the first bolt, and the second end of the second spring abuts against the surface of the first side of the first lower frame body; the roller seat is located on the second side of the first lower frame body opposite to the first side, the roller seat is fixedly connected to the first end of the first bolt, and the roller is installed on the roller seat; the second end of the metal wire passes through the first I-shaped wheel and then passes downward around the roller and is connected to the second fixed frame.

[0023] By screwing the first bolt, the position of the roller seat and the roller can be pre-adjusted, thereby adjusting the slackness of the metal wire, and ultimately ensuring that the metal wire can be tightened on the battery cell.

[0024] In some embodiments, two first insulating blocks and two second insulating blocks are further provided on the mounting frame, wherein: the two first insulating blocks are respectively positionally adjustable mounted on the first ends of two opposite side frames of the mounting frame, and the two second insulating blocks are respectively positionally adjustable mounted on the second ends of two opposite side frames of the mounting frame; the two ends of the first support row are respectively connected to one of the first insulating blocks, and the two ends of the second support row are respectively connected to one of the second insulating blocks.

[0025] By adjusting the installation positions of the two first insulating blocks and the two second insulating blocks, the spacing between the first support row and the second support row can be adjusted, so that the front crimping part can power on the front side of battery cells of different sizes, thereby improving compatibility.

[0026] In some embodiments, the front crimping portion also includes a third support row and a fourth support row, wherein both ends of the third support row are connected to the first ends of the other two opposite frames of the mounting frame, and both ends of the fourth support row are respectively connected to the second ends of the other two opposite frames of the mounting frame; the first end of the pressing wire is connected to the third support row, and the second end of the pressing wire is connected to the fourth support row.

[0027] The third support row and the fourth support row are provided to facilitate the installation of the pressing wire.

[0028] In some embodiments, third fixing frames corresponding to the pressed wires are arranged at intervals on the third support row, and fourth fixing frames corresponding to the pressed wires are arranged at intervals on the fourth support row; the first end of the pressed wire is fixed on the corresponding third fixing frame, and the second end of the pressed wire is fixed on the corresponding fourth fixing frame.

[0029] By providing the third fixing frame and the fourth fixing frame, the connection strength between the two ends of the pressed wire and the third supporting row and the fourth supporting row is ensured, thereby preventing the pressed wire from falling off.

[0030] In some embodiments, the third fixing frame has the same structure as the fourth fixing frame and is symmetrically arranged one by one, the third fixing frame includes a second upper frame body, a second lower frame body, a second bolt, a guide rod, a third spring, a second bearing and a second I-shaped wheel, wherein: the second upper frame body is connected to the third support row, the second upper frame body includes a vertical plate and a first mounting plate and a second mounting plate arranged parallel to the vertical plate vertically, and the second mounting plate is provided with a vertical through hole; the first end of the second bolt passes through the vertical through hole of the second mounting plate and is screwed to the upper end part of the second lower frame body, and the nut on the second end of the second bolt is located on the lower end surface of the second mounting plate; the upper and lower ends of the guide rod are fixed to the first mounting plate and the second mounting plate respectively; the third spring is sleeved on the guide rod, the upper end of the third spring abuts against the upper end part of the second lower frame body, and the lower end of the third spring abuts against the second mounting plate; the outer ring of the second bearing is fixedly arranged at the lower end part of the second lower frame body, the second I-shaped wheel is fixedly installed on the inner ring of the second bearing, and the first end of the pressing thread is fixed on the second I-shaped wheel.

[0031] By screwing the second bolt, the height of the second lower frame can be adjusted, thereby adjusting the height of the pressing wire, and finally ensuring that the pressing wire can press the metal wire against the front of the battery cell. When the second lower frame is lifted or lowered relative to the second upper frame under the push of the second bolt, the third spring adaptively expands and contracts and keeps pressing the upper end of the second lower frame and the second mounting plate of the second upper frame, thereby ensuring the connection stability between the second lower frame and the second upper frame and preventing the second lower frame from loosening.

[0032] In some embodiments, the material of the pressed wire is the same as the material of the metal wire.

[0033] The pressing wire can also be used to power up the grid lines on the front side of the battery cell pressed by it, thereby further improving the power-up effect of the present application on the front side of the battery cell.

[0034] In some embodiments, the support platform includes a mounting seat and an insulating plate, wherein: the insulating plate is arranged on the mounting seat, a hollow area is arranged in the middle of the insulating plate, the conductive sheet is embedded in the hollow area, the upper surface of the insulating plate and the upper surface of the conductive sheet are located on the same horizontal plane to constitute the support surface of the support platform; an exhaust pipeline connected to the exhaust device is arranged in the mounting seat, and an adsorption hole connected to the exhaust pipeline is arranged on the conductive sheet, and the exhaust device exhausts air from the adsorption hole through the exhaust pipeline so that the adsorption hole generates adsorption force.

[0035] By embedding the conductive sheet in the hollow area in the middle of the insulating plate, it is ensured that the conductive sheet only applies electricity to the lower surface of the battery cell, preventing leakage of the conductive sheet. By providing an exhaust pipeline and adsorption holes, the supporting platform can adsorb and fix the battery cell, ensuring that the conductive sheet is in full contact with the lower surface of the battery cell.

[0036] In some embodiments, a heating component is further disposed in the mounting base, and the heating component is used to heat the insulating plate and the conductive sheet.

[0037] By arranging a heating component in the mounting base, the insulating plate and the conductive sheet are heated, thereby further improving the optimization processing effect on the battery sheet.

[0038] In some embodiments, the insulation board is provided with downwardly inclined tightening slopes at both side edges close to both ends of the metal wire.

[0039] Make sure the metal wire is close to the upper surface of the battery cell to prevent it from curling up or arching. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the voltage connection mechanism on the battery cell in the embodiment of the present application;

[0041] Figure 2 It is a structural schematic diagram of the carrying platform in the embodiment of the present application;

[0042] Figure 3 It is a schematic diagram of the partial structure of the carrier platform in the embodiment of the present application;

[0043] Figure 4 is a schematic structural diagram of the first fixing frame in an embodiment of the present application at a first viewing angle;

[0044] Figure 5 is a schematic structural diagram of the first fixing frame in the embodiment of the present application at a second viewing angle;

[0045] Figure 6 for Figure 5 AA section view;

[0046] Figure 7 This is a schematic structural diagram of a first bearing and a first spool in an embodiment of the present application;

[0047] Figure 8 is a schematic structural diagram of a third fixing bracket in an embodiment of the present application at a first viewing angle;

[0048] Fig. 9 is a schematic structural diagram of a third fixing bracket in an embodiment of the present application at a second viewing angle;

[0049] Fig.10 This is a schematic diagram of the structure of the second bearing and the second spool in the embodiment of the present application;

[0050] Figures 1 to 10 Included:

[0051] Front crimping part 1:

[0052] Installation frame 11, metal wire 12, first support row 13, second support row 14, first fixing frame 15, first upper frame body 151, first lower frame body 152, first bearing 153, first I-shaped wheel 154, rotating shaft 155, first spring 156, roller seat 157, roller 159, first bolt 160, second spring 161, pressing wire 17, third support row 18, fourth support row 19, third fixing frame 110, fourth fixing frame 120, second upper frame body 111, second lower frame body 112, guide rod 113, third spring 114, second bearing 115, second I-shaped wheel 116, vertical plate 1111, first mounting plate 1112, second mounting plate 1113, vertical through hole 1114, first insulating block 130, second insulating block 140;

[0053] Loading platform 2:

[0054] Conductive sheet 21 , mounting seat 22 , insulating plate 23 , pressing inclined surface 24 . DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0056] like Figure 1 to Figure 2 As shown, the voltage connection mechanism on the battery cell in the embodiment of the present application includes a front pressure connection portion 1 and a support platform 2, wherein:

[0057] The front crimping portion 1 includes a mounting frame 11 , a plurality of metal wires 12 and a plurality of pressing wires 17 , wherein the plurality of metal wires 12 are arranged side by side and spaced apart on the mounting frame 11 , and the plurality of pressing wires 17 are arranged side by side and spaced apart on the mounting frame 11 , wherein the pressing wires 17 are located above the metal wires 12 and press the metal wires 12 .

[0058] The carrying platform 2 is disposed below the front crimping portion 1 . The carrying platform 2 is used to carry the battery cell. The grid lines on the back of the battery cell are closely attached to the conductive sheet 21 of the carrying platform 2 .

[0059] At least one of the mounting frame 11 and the carrier 2 is configured to be able to descend or ascend toward the other, so that the plurality of metal wires 12 are pressed against the front grid lines of the cell and the plurality of pressing wires 17 press the plurality of metal wires 12 downward.

[0060] For example, the mounting frame 11 remains stationary in the vertical direction, and the carrier 2 is mounted on the lifting drive module. The lifting drive module drives the carrier 2 to rise toward the mounting frame 11, so that a number of metal wires 12 can be pressed against the front grid lines of the battery cell, and the pressing wire 17 presses the metal wire 12 downward to prevent the middle section of the metal wire 12 from tilting upward. The "middle section" of the metal wire 12 refers to the portion located on the upper surface of the battery cell when the metal wire 12 is pressed downward toward the battery cell.

[0061] After the metal wire 12 is pressed against the front grid line of the cell, the power module powers the cell from the upper and lower surfaces through the metal wire 12 and the conductive sheet 21, so that a predetermined voltage is generated on the cell. Subsequently, the laser scanning mechanism performs a laser scan on the front of the powered cell to perform an optimization process on the cell.

[0062] The voltage connection mechanism on the battery cell provided in the embodiment of the present application has a power-on component of the front crimping portion 1 that is a plurality of metal wires 12 that span the battery cell, and the metal wires 12 can contact the majority of grid lines on the front of the battery cell, thereby improving the power-on effect of the power supply on the front of the power chip. In addition, the back of the battery cell is closely attached to the conductive sheet on the carrier, so that the grid lines on the back of the battery cell can be ensured to form a stable contact with the conductive sheet, thereby improving the power-on effect of the power supply on the back of the battery cell.

[0063] In particular, the voltage connection mechanism on the battery cell of the present application is also provided with a pressing wire 17, which can press the metal wire 12 from above, thereby ensuring that the middle section of the metal wire 12 is pressed tightly against the front side of the battery cell, preventing the middle section of the metal wire 12 from warping up and detaching from the grid line.

[0064] The “power-on” mentioned in the present application refers to the formation of an electrical connection between the two, for example, an electrical connection is formed between the metal wire 12 and the grid line on the front side of the battery cell, and an electrical connection is formed between the conductive sheet 22 and the grid line on the back side of the battery cell, so that the power module can apply voltage to the battery cell through the metal wire 12 and the conductive sheet 22.

[0065] There are at least fine grid lines (or called secondary grid lines) on the front of the battery cell, and there may also be main grid lines on the front of the battery cell. The metal wire 12 at least needs to be vertically crimped onto the fine grid lines on the front of the battery cell.

[0066] Optionally, the pressing wires 12 are arranged perpendicular to the metal wires 17. When the mounting frame 11 and the supporting platform 2 are close to each other, the metal wires 12 and the pressing wires 17 are successively tightened on the front side of the battery cell, and the middle sections of all the metal wires 12 are pressed by the pressing wires 12 on the corresponding grid lines on the front side of the battery cell.

[0067] Of course, only some of the pressing wires 17 may be arranged perpendicular to the metal wire 12, as long as the pressing wires 17 perpendicular to the metal wire 12 can press the middle section of the metal wire 12. Alternatively, among the plurality of pressing wires 17, at least two groups of pressing wires 17 can symmetrically press the metal wire 12, wherein each group of pressing wires includes at least one pressing wire.

[0068] Continue to refer Figure 1 As shown, optionally, the front crimping portion 1 further includes a first support row 13 and a second support row 14, wherein: the two ends of the first support row 13 are respectively connected to two opposite frames of the installation frame 11 (such as Figure 1 The first end of the left and right frames of the mounting frame 11 is connected to the first end of the second support row 14, and the two ends of the second support row 14 are respectively connected to the second ends of the two opposite frames of the mounting frame 11. The first end of the metal wire 12 is connected to the first support row 13, and the second end of the metal wire 12 is connected to the second support row 14. By providing the first support row 13 and the second support row 14, the installation of the metal wire 12 is facilitated, so that a plurality of metal wires 12 are arranged side by side on the mounting frame 11.

[0069] The first support row 13 and the second support row 14 can be made of metal conductive material. The power module is electrically connected to at least one of the first support row 13 and the second support row 14 , thereby achieving conduction with all the metal wires 12 .

[0070] In order to ensure the connection strength between the two ends of the metal wire 12 and the first support row 13 and the second support row 14, the metal wire 12 is prevented from falling off when it is pressed. Figure 1As shown, optionally, first fixing frames 15 corresponding to the metal wires 12 are arranged at intervals on the first support row 13, and second fixing frames corresponding to the metal wires 12 are arranged at intervals on the second support row 14. The first end of the metal wire 12 is fixed to the corresponding first fixing frame 15, and the second end of the metal wire 12 is fixed to the corresponding second fixing frame.

[0071] Optionally, the first fixing frame 15 and the second fixing frame have the same structure and are symmetrically arranged one by one. Figures 4 to 7 As shown, it includes a first upper frame 151, a first lower frame 152, a first bearing 153, and a first spool 154, wherein: the first upper frame 151 is connected to the first support row 13, and the first lower frame 152 is connected to the first upper frame 151. The outer ring of the first bearing 153 is fixedly arranged on the lower frame 152, the first spool 154 is fixedly connected to the inner ring of the first bearing 153, and the first end of the metal wire 12 is fixedly connected to the first spool 154. By arranging the first fixing frame 15 and the second fixing frame in this way, it can be ensured that the two ends of the metal wire 12 can be firmly connected to the first fixing frame 15 and the second fixing frame.

[0072] Still taking the first fixing frame 15 as an example, optionally, the first lower frame body 152 is rotatably connected to the first upper frame body 151 via the rotating shaft 155. The first fixing frame 15 further includes a first spring 156 arranged in the vertical direction, the first spring 156 is located on the side of the rotating shaft 155 close to the second fixing frame, the upper end of the first spring 156 abuts against the first upper frame body 151, and the lower end of the first spring 156 abuts against the first lower frame body 152.

[0073] With such arrangement, the first lower frame 152 of the first fixing frame 15 has a tendency to rotate around the rotation axis 155 away from the second fixing frame under the pressure of the first spring 156. Similarly, the first lower frame 152 of the second fixing frame has a tendency to rotate around the rotation axis 155 away from the first fixing frame 15 under the pressure of the first spring 156. In this way, when the metal wire 12 is pressed against the front surface of the battery cell, the first fixing frame 15 and the second fixing frame can pull the metal wire 12 in opposite directions at both ends after being pressed, and finally the metal wire 12 can be tightened on the front surface of the battery cell, further ensuring that the metal wire 12 can fully contact with the corresponding grid line.

[0074] Still taking the first fixing frame 15 as an example, the first fixing frame 15 may further include a roller seat 157, a roller 159, a first bolt 160 and a second spring 161, wherein: the rod of the first bolt 160 is accommodated in the through hole at the bottom of the first lower frame 152, the second spring 161 is sleeved on the first bolt 160 extending in the horizontal direction, the second spring 161 is located on the first side of the first lower frame 152, the first end of the second spring 161 abuts against the nut of the second end of the first bolt 160, and the second end of the second spring 161 abuts against the surface of the first side of the first lower frame 152. The roller seat 157 is located on the second side of the first lower frame 152 opposite to the first side, the roller seat 157 is fixedly connected to the first end of the first bolt 160, and the roller 159 is installed on the roller seat 157. The second end of the metal wire 12 passes through the I-shaped wheel 154 and goes around the roller 159 downward and is connected to the second fixing frame.

[0075] By screwing the first bolt 160 , the positions of the roller seat 157 and the roller 159 can be pre-adjusted, thereby adjusting the tightness of the metal wire 12 , and ultimately ensuring that the metal wire 12 can be tightened on the battery cell.

[0076] Continue to refer Figure 1 As shown, optionally, two first insulating blocks 130 and two second insulating blocks 140 are further provided on the installation frame 11, wherein: the two first insulating blocks 130 are respectively and positionally adjustable mounted on two opposite frames (e.g. Figure 1 The first end of the front and rear frames of the mounting frame 11 is provided with two second insulating blocks 140 which are respectively and adjustably mounted on the second ends of the two opposite frames of the mounting frame 11. The two ends of the first support row 13 are respectively connected to one of the first insulating blocks 130, and the two ends of the second support row 14 are respectively connected to one of the second insulating blocks 140.

[0077] By adjusting the installation positions of the two first insulating blocks 130 and the two second insulating blocks 140, the spacing between the first support row 13 and the second support row 14 can be adjusted, so that the front crimping portion 1 can implement front-side power-on for battery cells of different sizes, thereby improving the compatibility of the present application.

[0078] Optionally, the first insulating block 130 and the second insulating block 140 are made of polyetheretherketone, which has the advantages of high mechanical strength, high temperature resistance, impact resistance, flame retardancy, acid and alkali resistance, wear resistance, fatigue resistance, and excellent electrical insulation performance.

[0079] Continue to refer Figure 1 As shown, optionally, the front crimping portion 1 further includes a third support row 18 and a fourth support row 19, and the two ends of the third support row 18 are connected to the other two opposite frames of the installation frame 11 (such as Figure 1The first end of the pressing wire 17 is connected to the third supporting row 18, and the second end of the pressing wire 17 is connected to the fourth supporting row 19.

[0080] In order to ensure the connection strength between the two ends of the pressing wire 17 and the third support row 18 and the fourth support row 19, the pressing wire 17 is prevented from falling off when being pressed. Figure 1 As shown, optionally, third fixing frames 110 corresponding to the pressed wires 17 are arranged at intervals on the third support row 18, and fourth fixing frames 120 corresponding to the pressed wires 17 are arranged at intervals on the fourth support row 19. The first end of the pressed wire 17 is fixed to the corresponding third fixing frame 110, and the second end of the pressed wire 17 is fixed to the corresponding fourth fixing frame 120.

[0081] Optionally, the third fixing frame 110 and the fourth fixing frame 120 have the same structure and are symmetrically arranged one by one. Taking the third fixing frame 110 as an example, it includes a second upper frame body 111, a second lower frame body 112, a second bolt (not shown in the figure), a guide rod 113, a third spring 114, a second bearing 115 and a second I-shaped wheel 116, wherein: the second upper frame body 111 is connected to the third support row 18, the second upper frame body 111 includes a vertical plate 1111 and a first mounting plate 1112 and a second mounting plate 1113 vertically arranged in parallel with the vertical plate 1111, and the second mounting plate 1113 is provided with a vertical through hole 1114.

[0082] The first end of the second bolt 113 passes through the vertical through hole 1114 of the second mounting plate 1113 and is screwed to the upper end of the second lower frame 112. The nut on the second end of the second bolt 113 is located on the lower end surface of the second mounting plate 1113. The upper and lower ends of the guide rod 113 are fixed to the first mounting plate 1112 and the second mounting plate 1113, respectively. The third spring 114 is sleeved on the guide rod 113, the upper end of the third spring 114 abuts against the upper end of the second lower frame 112, and the lower end of the third spring 114 abuts against the second mounting plate 113. The outer ring of the second bearing 115 is fixedly arranged at the lower end of the second lower frame 112, the second I-shaped wheel 116 is fixedly installed on the inner ring of the second bearing, and the first end of the pressing thread is fixed to the second I-shaped wheel.

[0083] By screwing the second bolt 113, the height of the second lower frame 112 can be adjusted, thereby implementing the height adjustment of the pressing wire 117, and finally ensuring that the pressing wire 17 can press the metal wire 12 against the front of the battery cell. In addition, when the second lower frame 112 is lifted and lowered relative to the second upper frame 111 under the push of the second bolt 113, the third spring 114 adaptively expands and contracts, and keeps pressing the upper end of the second lower frame 112 and the second mounting plate 1113 of the second upper frame 111, thereby ensuring the connection stability between the second lower frame 112 and the second upper frame 111, and preventing the second lower frame 112 from loosening.

[0084] Optionally, the material of the pressing wire 17 is the same as that of the metal wire, and it also has conductivity. In this way, the pressing wire 17 can also power up the grid line on the front side of the cell pressed by it, thereby further improving the power-up effect of the present application on the front side of the cell.

[0085] like Figure 2 As shown, optionally, the supporting platform 2 includes a mounting seat 22 and an insulating plate 23, wherein: the insulating plate 23 is arranged on the mounting seat 22, a hollow area is arranged in the middle of the insulating plate 23, the conductive sheet 21 is embedded in the hollow area, and the upper surface of the insulating plate 23 and the upper surface of the conductive sheet 21 are located on the same horizontal plane to constitute the supporting surface of the supporting platform 2.

[0086] By embedding the conductive sheet 21 in the hollow area in the middle of the insulating plate 23 , it is ensured that the conductive sheet 21 only powers the lower surface of the battery cell, preventing the conductive sheet 21 from leaking electricity and causing the edge of the supporting platform 2 to be charged.

[0087] The insulating plate 23 may be a polyetheretherketone plate, which has the advantages of high mechanical strength, high temperature resistance, impact resistance, flame retardancy, acid and alkali resistance, wear resistance, fatigue resistance, and excellent electrical insulation performance.

[0088] Optionally, the mounting seat 22 is further provided with an exhaust pipeline connected to the exhaust device, and the conductive sheet 21 is further provided with an adsorption hole connected to the exhaust pipeline, and the exhaust device exhausts air from the adsorption hole through the exhaust pipeline to make the adsorption hole generate adsorption force. With such a configuration, the supporting platform 2 can implement adsorption and fixation of the battery sheet, ensure that the conductive sheet 21 is in full contact with the lower surface of the battery sheet, and prevent the battery sheet from accidentally sliding during the processing process.

[0089] like Figure 3 As shown, optionally, the insulating plate 23 is provided with downwardly inclined pressing inclined surfaces 24 at both side edges near both ends of the metal wire 12. Such a configuration can prevent the metal wire 12 from being raised by the two side edges of the insulating plate 23, resulting in the phenomenon that the middle section is warped or arched upward, thereby further ensuring that the metal wire 12 is closely attached to the upper surface of the battery cell.

[0090] Optionally, a heating component is further disposed in the mounting seat 22 , and the heating component is used to heat the insulating plate 23 and the conductive sheet 21 .

[0091] The present application is described in sufficient detail above with certain particularity. It should be understood by those skilled in the art that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, rather than by the above description in the embodiments.

Claims

1. A voltage connection mechanism on a battery cell, characterized in that: The voltage connection mechanism on the battery cell includes a front side crimping portion and a supporting platform, wherein: The front crimping portion includes a mounting frame, a plurality of metal wires and a plurality of pressing wires, wherein the plurality of metal wires are arranged side by side and at intervals on the mounting frame, and the plurality of pressing wires are arranged side by side and at intervals on the mounting frame, wherein the pressing wires are located above the metal wires and press the metal wires; The carrying platform is arranged below the front upper electrical part, and the carrying platform is used to carry the battery cell, and the grid lines on the back of the battery cell are closely attached to the conductive sheet of the carrying platform; At least one of the mounting frame and the carrier is configured to be able to descend or ascend toward the other, so that the plurality of metal wires are pressed against and contacted with the front grid lines of the battery cell, and the plurality of pressing wires press the plurality of metal wires downward.

2. The voltage connection mechanism on a battery cell according to claim 1, characterized in that: All the pressed wires are arranged perpendicular to the metal wire; or, at least part of the pressed wires are arranged perpendicular to the metal wire; or, at least two groups of pressed wires among the pressed wires symmetrically press the metal wire, and each group of pressed wires includes at least one pressed wire.

3. The voltage connection mechanism on a battery cell according to claim 1, characterized in that: The front crimping portion further comprises a first support row and a second support row, wherein: Two ends of the first support row are respectively connected to first ends of two opposite frames of the installation frame, and two ends of the second support row are respectively connected to second ends of two opposite frames of the installation frame; The first end of the metal wire is connected to the first support row, and the second end of the metal wire is connected to the second support row.

4. The voltage connection mechanism on a battery cell as claimed in claim 3, characterized in that: The first support row is provided with first fixing frames corresponding to the metal wires at intervals, and the second support row is provided with second fixing frames corresponding to the metal wires at intervals; The first end of the metal wire is fixed on the corresponding first fixing frame, and the second end of the metal wire is fixed on the corresponding second fixing frame.

5. The voltage connection mechanism on a battery cell as claimed in claim 4, characterized in that: The first fixing frame and the second fixing frame have the same structure and are symmetrically arranged one by one. The first fixing frame includes a first upper frame body, a first lower frame body, a first bearing, and a first spool, wherein: The first upper frame is connected to the first support row, and the first lower frame is connected to the first upper frame; The outer ring of the first bearing is fixedly arranged on the lower frame body, the first spool is fixedly connected to the inner ring of the first bearing, and the first end of the metal wire is fixedly connected to the first spool.

6. The voltage connection mechanism on a battery cell as claimed in claim 5, characterized in that: The first lower frame is rotatably connected to the first upper frame via a rotating shaft; The first fixing frame also includes a first spring arranged in the vertical direction. The first spring is located on a side of the rotating shaft close to the second fixing frame. The upper end of the first spring abuts against the first upper frame body, and the lower end of the first spring abuts against the first lower frame body.

7. The voltage connection mechanism on a battery cell according to claim 5, characterized in that: The first fixing frame further comprises a roller seat, a roller, a first bolt and a second spring, wherein: The rod of the first bolt is accommodated in the through hole at the bottom of the first lower frame body, the second spring is sleeved on the first bolt extending in the horizontal direction, the second spring is located on the first side of the first lower frame body, the first end of the second spring abuts against the nut at the second end of the first bolt, and the second end of the second spring abuts against the surface of the first side of the first lower frame body; The roller seat is located at a second side of the first lower frame body opposite to the first side, the roller seat is fixedly connected to the first end of the first bolt, and the roller is mounted on the roller seat; The second end of the metal wire passes through the first spool downward around the roller and is connected to the second fixing frame.

8. The voltage connection mechanism on a battery cell as claimed in claim 3, characterized in that: The installation frame is also provided with two first insulating blocks and two second insulating blocks, wherein: The two first insulating blocks are respectively and positionally mounted on the first ends of the two opposite frames of the installation frame, and the two second insulating blocks are respectively and positionally mounted on the second ends of the two opposite frames of the installation frame; Two ends of the first support row are respectively connected to one of the first insulating blocks, and two ends of the second support row are respectively connected to one of the second insulating blocks.

9. The voltage connection mechanism on a battery cell according to claim 1, characterized in that: The front crimping portion further includes a third support row and a fourth support row, wherein two ends of the third support row are connected to the first ends of the other two opposite frames of the installation frame, and two ends of the fourth support row are respectively connected to the second ends of the other two opposite frames of the installation frame; The first end of the pressing wire is connected to the third support row, and the second end of the pressing wire is connected to the fourth support row.

10. The voltage connection mechanism on a battery cell according to claim 9, characterized in that: The third support row is provided with third fixing frames corresponding to the pressing wires one by one at intervals, and the fourth support row is provided with fourth fixing frames corresponding to the pressing wires one by one at intervals; The first end of the pressing wire is fixed on the corresponding third fixing frame, and the second end of the pressing wire is fixed on the corresponding fourth fixing frame.

11. The voltage connection mechanism on a battery cell according to claim 10, characterized in that: The third fixing frame has the same structure as the fourth fixing frame and is symmetrically arranged one by one. The third fixing frame includes a second upper frame body, a second lower frame body, a second bolt, a guide rod, a third spring, a second bearing and a second I-shaped wheel, wherein: The second upper frame is connected to the third support row, and the second upper frame includes a vertical plate and a first mounting plate and a second mounting plate vertically and parallelly arranged in the vertical plate, and the second mounting plate is provided with a vertical through hole; The first end of the second bolt passes through the vertical through hole of the second mounting plate and is screwed to the upper end of the second lower frame body, and the nut on the second end of the second bolt is located on the lower end surface of the second mounting plate; The upper end and the lower end of the guide rod are respectively fixed to the first mounting plate and the second mounting plate; The third spring is sleeved on the guide rod, the upper end of the third spring abuts against the upper end of the second lower frame, and the lower end of the third spring abuts against the second mounting plate; The outer ring of the second bearing is fixedly arranged at the lower end of the second lower frame, the second spool is fixedly installed on the inner ring of the second bearing, and the first end of the pressing thread is fixed on the second spool.

12. The voltage connection mechanism on a battery cell according to claim 1, characterized in that: The material of the pressed wire is the same as that of the metal wire.

13. The voltage connection mechanism on a battery cell according to claim 1, characterized in that: The bearing platform includes a mounting seat and an insulating plate, wherein: The insulating plate is arranged on the mounting seat, a hollow area is arranged in the middle of the insulating plate, the conductive sheet is embedded in the hollow area, and the upper surface of the insulating plate and the upper surface of the conductive sheet are located on the same horizontal plane to form a bearing surface of the bearing platform; An exhaust pipeline connected to an exhaust device is provided in the mounting seat, and an adsorption hole connected to the exhaust pipeline is provided on the conductive sheet. The exhaust device exhausts air from the adsorption hole through the exhaust pipeline so that the adsorption hole generates an adsorption force.

14. The voltage connection mechanism on a battery cell according to claim 13, characterized in that: A heating component is also arranged in the mounting seat, and the heating component is used to heat the insulating plate and the conductive sheet.

15. The voltage connection mechanism on a battery cell according to claim 13, characterized in that: The insulation plate is provided with downwardly inclined tightening slopes at both side edges close to the two ends of the metal wire.

Images