CN114770118A - A kind of battery string welding equipment and welding method - Google Patents

Abstract

The invention provides a battery string welding device and a welding method, wherein the battery string welding device comprises a welding conveying device, a battery piece laying device, a welding strip processing device, a welding strip traction device and a welding device, wherein: the welding conveying device is used for conveying the battery piece and the welding strip group; the battery piece laying device is used for laying the back side of the battery piece upwards on the welding conveying device; the welding strip processing device is used for clamping a plurality of welding strips, driving the welding strips to be switched between a first welding strip group feeding station and a second welding strip group feeding station, and cutting the welding strips to obtain a welding strip group; the welding strip traction device is used for drawing the welding strip group at the first welding strip group feeding station and stacking the welding strip group on the odd-numbered electrode row of the corresponding battery piece, and drawing the welding strip group at the second welding strip group feeding station and stacking the welding strip group on the even-numbered electrode row; and the welding device welds the stacked welding strip group and the battery piece into a string. The battery string welding equipment realizes the welding string of the back contact type battery pieces.

Description

A kind of battery string welding equipment and welding method

technical field

The invention relates to the field of battery production, in particular to a battery string welding device and a welding method.

Background technique

There is no busbar on the front side of the back-contact cell, and both the positive electrode row and the negative electrode row are arranged on the back of the cell, thereby reducing the shading of the cell and improving the light conversion efficiency of the cell.

As shown in FIG. 1 , the back-contact cell 100 is provided with a first electrode (such as a positive electrode) and a second electrode (such as a negative electrode) with opposite polarities, and the first electrodes are arranged in a row and form at least two rows of In one electrode row 101, the second electrodes are arranged in a row to form at least two rows of second electrode rows 102, and the first electrode row 101 and the second electrode row 102 are alternately arranged.

As shown in FIG. 2 and FIG. 3 , the method of welding the back-contact cells into a string is as follows: place the N cells 100 with their backs facing upward in sequence, and make the polarity of the electrode row whose adjacent cells are on the same straight line. on the contrary. N+1 welding ribbon groups are used to weld N cells 100 into a string, wherein: odd-numbered welding ribbon groups (the first, third and fifth welding ribbon groups in the figure), even-numbered welding ribbon groups (The 2nd and 4th ribbon groups in the figure) are staggered.

In the traditional back-contact battery chip welding equipment, in order to realize the staggered laying of the odd-numbered and even-numbered solder ribbon groups, it is necessary to set up two solder ribbon coil groups. The number of solder tape rolls included in each solder tape roll group is half of the number of electrode rows on the battery sheet.

The welding strip pulling device pulls the odd-numbered welding strip set and the even-numbered welding strip set from the two welding strip coil groups in turn, and staggers the odd-numbered welding strip set and the even-numbered welding strip set to the on the battery.

The disadvantage of the traditional back-contact battery chip welding equipment is that it needs to set up a large number of welding strip material rolls, which increases the cost of the welding equipment.

SUMMARY OF THE INVENTION

In order to solve the above technical problems, the present invention provides a battery string welding equipment, which adopts the following technical solutions:

A battery string welding equipment is used for welding battery slices into strings, the back of the battery slices is provided with a first electrode row and a second electrode row arranged in a staggered manner, and the battery string welding equipment includes a welding conveying device and a battery slice laying device. , Ribbon processing device, Ribbon pulling device and welding device, including:

The welding conveying device is used for conveying the battery sheet and the welding belt group along the first horizontal direction;

The battery sheet laying device is used for laying the N battery sheets on the welding conveying device with their backs facing upwards along the first horizontal direction, so that the polarities of the electrode rows on the same straight line between the adjacent battery sheets are opposite;

The welding strip processing device is used to clamp a plurality of welding strips extending along the first horizontal direction, and drive the welding strips to move in the second horizontal direction perpendicular to the first horizontal direction, so as to realize the supply of welding strips in the first welding strip group. Position switching between the feeding station and the second welding ribbon group feeding station, and cutting off the welding ribbons at the first welding ribbon group feeding station and the second welding ribbon group feeding station to obtain the welding ribbon group;

The welding ribbon pulling device is used for pulling the welding ribbon group at the feeding station of the first welding ribbon group and stacking it on the odd-numbered electrode row corresponding to the battery sheet on the welding conveying device, and for pulling the second welding ribbon group for feeding The welding belt group at the station is stacked on the even-numbered electrode row corresponding to the cell on the welding conveying device;

The welding device welds the stacked welding ribbon groups and battery sheets into a string.

Through the cooperation of the welding conveying device, the cell laying device, the welding strip processing device, the welding strip pulling device and the welding device, the battery string welding equipment of the present invention realizes the welding of the back-contact battery cells into strings.

In particular, the welding strip processing device in the present invention can drive the welding strip to move between the first welding strip group feeding station and the second welding strip group feeding station, so as to ensure that the welding strip pulling device can move from the first welding strip group feeding station to the second welding strip group feeding station. The belt group feeding station and the second welding belt group feeding station alternately obtain the odd-numbered welding belt group and the even-numbered welding belt group, and stagger the odd-numbered welding belt group and the even-numbered welding belt group. Place it on the battery sheet. The set quantity of the soldering tape rolls of the present invention is only half of that of the conventional back-contact battery chip soldering equipment, which greatly reduces the cost of the soldering equipment.

In some embodiments, the welding strip processing device includes a welding strip clamping mechanism and a welding strip cutting mechanism, wherein: the welding strip clamping mechanism is used for clamping the welding strip and driving the welding strip to move in the second horizontal direction, so as to realize The position of the welding strip is switched between the feeding station of the first welding strip group and the feeding station of the second welding strip group; The ribbon group feeding station, the ribbon at the second ribbon group feeding station to obtain the ribbon group.

Through the cooperation of the welding strip clamping mechanism and the welding strip cutting mechanism, the welding strip processing device realizes that the odd-numbered welding strip group and the even-numbered welding strip group are alternately supplied to the first welding strip group feeding station and the second welding strip group. At the feeding station of the welding strip group.

In some embodiments, the welding ribbon cutting mechanism is connected to the welding ribbon clamping mechanism, and the welding ribbon cutting mechanism moves with the welding ribbon clamping mechanism in the second horizontal direction; or, the welding ribbon cutting mechanism includes a first cutting execution part and The second cutting execution part, the first cutting execution part is arranged at the feeding station of the first welding strip group, and is used for cutting the welding strip at the feeding station of the first welding strip group; the second cutting execution part is arranged at the first welding strip group feeding station The second welding ribbon group feeding station is used for cutting the welding ribbon at the second welding ribbon group feeding station; The second welding strip group feeding station, the cutting execution part of the welding strip cutting mechanism is not only used to cut the welding strip at the feeding station of the first welding strip group, but also used to cut off the welding strip at the feeding station of the second welding strip group. Ribbon.

Three implementation manners of the welding ribbon cutting mechanism with simple structure are provided, all of which can realize the cutting of the welding ribbon at the feeding station of the first welding ribbon group and the feeding station of the second welding ribbon group.

In some embodiments, the ribbon pulling device includes a first ribbon pulling mechanism and a second ribbon pulling mechanism, wherein: the first ribbon pulling mechanism is used for pulling the wire moving to the feeding station of the first ribbon group. Welding belt, and laying the welding belt group at the feeding station of the first welding belt group on the welding conveying device; the second welding belt pulling mechanism is used for pulling and moving to the feeding station of the second welding belt group welding strips, and laying the welding strip sets at the second welding strip set feeding station onto the welding conveyor.

The first welding belt pulling mechanism and the second welding belt pulling mechanism alternately pull the welding belt, and implement the laying of the first welding belt group and the second welding belt group, which greatly improves the welding belt laying efficiency.

In some embodiments, the ribbon pulling device includes a mounting bracket and a plurality of first clips and a plurality of second clips staggered on the mounting bracket, wherein: the first clips are used for pulling the first welding ribbon The welding strip at the group feeding station, and the welding belt group at the first welding belt group feeding station is laid on the welding conveying device; the second chuck is used for pulling the second welding belt group feeding worker welding strip at the position, and laying the welding strip group at the feeding station of the second welding strip group onto the welding conveying device.

By arranging the welding strip pulling device, the welding strip pulling device can not only pull the first welding strip group located at the feeding station of the first welding strip group, but also can carry out the supplying of the second welding strip group. Pulling of the second ribbon group at the material station.

In some embodiments, the battery string welding equipment further includes a welding ribbon unwinding device and a flux coating device, wherein: the welding ribbon unwinding device includes a mounting plate and a plurality of discharging trays arranged on the mounting plate, each discharging The coils respectively support a roll of soldering tape and release a soldering tape; the soldering tape released from the material reel passes through the flux coating device, and then penetrates into the welding tape processing device. The flux coating device is used to Flux is applied to the ribbon.

By setting the welding strip unwinding device, the feeding of the welding strip is realized. And by providing the flux coating device, the flux can be automatically applied to the welding tape, which improves the welding efficiency.

In some embodiments, the device for placing battery slices includes a battery slice feeding mechanism, a battery slice conveying mechanism, a battery slice positioning platform and a conveying mechanism, wherein the battery slice feeding mechanism is used for feeding the battery slices in the battery box to the battery slice conveying mechanism. In terms of mechanism, the battery slice conveying mechanism is used to transport the battery slices to the battery slice positioning platform, the battery slice positioning platform is used to implement the positioning of the battery slices, and the transport mechanism is used to pick up the battery slices from the battery slice positioning platform and place the battery slices. The sheet is placed on the welding conveying device; the cell positioning platform is provided with a regularization mechanism, and the regularization mechanism is used to implement the regularization of the cell on the cell positioning platform.

Through the cooperation of the cell feeding mechanism, the cell conveying mechanism, the cell positioning platform and the conveying mechanism, the cell placement device realizes the automatic feeding, conveying, positioning and laying of the cell. By arranging a regularization mechanism on the cell positioning platform, the regularization of the cell is realized.

In some embodiments, the handling mechanism is configured to simultaneously pick up a cell and a tool, place the picked cell on the welding conveyor, and place the picked tool on the welding conveyor or the corresponding battery On the chip to compress the corresponding welding strip group.

Simultaneous laying of cells and tooling is realized, and while the laying of one cell is completed, the laying of one tooling is completed. On the one hand, the laying efficiency is improved, and on the other hand, it is ensured that the laid ribbon group can be pressed on the corresponding cell in time to prevent the ribbon group from deviating from the electrode row.

In some embodiments, the cell placement device further includes a cell rotation mechanism disposed on the cell conveying mechanism, and the cell rotation mechanism is configured to rotate the conveyed subsequent cell relative to the preceding cell by 180° .

By arranging a cell rotation mechanism on the cell conveying mechanism, 180° rotation of the subsequent cell is achieved, so that the polarity of the electrode rows on the same straight line between adjacent cells can be ensured to be opposite.

In some embodiments, the battery string welding equipment further includes a pressing device, and the pressing device is used for pressing the stacked welding ribbon group and the battery sheets.

By setting the pressing device, it can be ensured that the welding ribbon group is pressed on the corresponding battery sheet, thereby ensuring the welding effect and preventing virtual welding.

In some embodiments, the pressing device includes a tooling conveying mechanism, a tooling stacking mechanism, a tooling and a tooling removing mechanism, wherein: the tooling conveying mechanism is arranged on the side of the welding conveying device, and the tooling conveying mechanism is used for circulating conveying the tooling; The stacking mechanism is used to transport the tooling on the tooling conveying mechanism to the welding conveying device to compress the stacked welding belt groups and battery sheets; the tooling removal mechanism is used to transport the tooling from the welding conveying device back to the tooling conveying mechanism. .

Through the cooperation of the tooling conveying mechanism, the tooling stacking mechanism and the tooling removing mechanism, the tooling is automatically placed on the welding conveying device to realize the pressing of the welding belt group and the battery sheet, and the tooling is automatically placed after the welding is completed. Carry it back to the tooling conveying mechanism to realize the recycling of the tooling.

The present invention also provides a battery string welding method, which is used for welding the battery sheets into strings, the back of the battery sheet is provided with a first electrode row and a second electrode row arranged in a staggered manner, and the battery string welding method includes:

The N battery sheets are laid on the welding conveying device conveyed along the first horizontal direction with their backs facing upwards, and the polarities of the electrode rows on the same straight line of the adjacent battery sheets are reversed.

Clamping a plurality of welding strips extending along the first horizontal direction, and driving the welding strips to move in a second horizontal direction perpendicular to the first horizontal direction, so as to realize the welding strips in the first welding strip group feeding station and the second welding strip group. The positions between the welding ribbon group feeding stations are switched, and the welding ribbons at the first welding ribbon group feeding station and the second welding ribbon group feeding station are cut to obtain the welding ribbon group.

Pull the welding ribbon group at the feeding station of the first welding ribbon group and stack it on the odd-numbered electrode row corresponding to the cell on the welding conveying device, and pull the welding ribbon group at the feeding station of the second welding ribbon group and put it on the welding conveyor. Stacked on the even-numbered electrode row corresponding to the battery sheet on the welding conveying device.

Weld the stacked ribbon packs and cells into strings.

The battery string welding method of the present invention realizes the welding of back-contact battery sheets into strings. In particular, the present invention can drive the welding strip to move between the first welding strip group feeding station and the second welding strip group feeding station, so as to ensure that the welding strip pulling device can move from the first welding strip group feeding station , The second welding ribbon group feeding station alternately obtains the odd-numbered welding ribbon group and the even-numbered welding ribbon group, and alternately lays the odd-numbered welding ribbon group and the even-numbered welding ribbon group on the battery sheet.

In some embodiments, the battery string welding method further includes:

Place N+1 tooling on the welding conveyor or the corresponding cell to compress the corresponding welding belt group, wherein:

While placing the second cell on the welding conveyor, place the first tool on the welding conveyor to compress the first half of the first welding ribbon group.

While placing the i-th cell on the welding conveyor, place the i-1-th tool on the i-2-th cell to compress the i-th cell stacked on the i-2-th cell The second half of the two ribbon groups and the first half of the i-1 th ribbon group, where i is any natural number from 3 to N.

Place the N th tooling on the N-1 th battery sheet to compress the second half of the N-1 th welding ribbon group and the first half of the N th welding ribbon group on the N-1 th battery sheet.

Place the N+1 th tooling on the N th cell sheet to compress the second half of the N th welding ribbon group and the first half of the N+1 th welding ribbon group on the N cell sheets.

In the process of completely laying the cells, the laying of the welding belt group and the tooling is completed simultaneously, which can improve the laying efficiency on the one hand, and ensure that the laid welding belt group can be pressed in time in the corresponding position on the other hand. on the battery sheet, to prevent the ribbon group from deviating from the electrode row.

Description of drawings

Figure 1 is a structural diagram of a back-connected cell;

FIG. 2 is a schematic structural diagram of four back-connected cells after being welded into a string by a ribbon group;

FIG. 3 is a schematic structural diagram of a battery string welding device provided in an embodiment of the present invention from a first perspective;

FIG. 4 is a schematic structural diagram of a battery string welding device provided in an embodiment of the present invention from a second viewing angle;

FIG. 5 is a schematic structural diagram of a battery string welding device provided in an embodiment of the present invention from a third viewing angle;

6 to 12 are schematic diagrams of the laying process of the battery sheet, the welding ribbon group and the tooling in the embodiment of the present invention;

Included in Figures 1 to 12 are:

The battery sheet 100, the first electrode row 101, the second electrode row 102;

Welding conveying device 10, cell placement device 20, ribbon processing device 30, ribbon pulling device 40, ribbon clamping mechanism 31, ribbon cutting mechanism 32, first ribbon pulling mechanism 41, second ribbon pulling Mechanism 42 , welding device 50 .

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Hereinafter, the battery string welding device and the battery string welding method provided by the present invention will be exemplarily introduced respectively through two embodiments.

In the traditional back-contact battery chip welding equipment, in order to realize the staggered laying of the odd-numbered and even-numbered solder ribbon groups, it is necessary to set up two solder ribbon coil groups. The number of solder tape rolls included in each solder tape roll group is half of the number of electrode rows on the battery sheet.

The welding strip pulling device pulls the odd-numbered welding strip set and the even-numbered welding strip set from the two welding strip coil groups in turn, and staggers the odd-numbered welding strip set and the even-numbered welding strip set to the on the battery.

The disadvantage of the traditional back-contact battery chip welding equipment is that it needs to set up a large number of welding strip material rolls, which increases the cost of the welding equipment.

The disadvantage of the traditional back-contact battery chip welding equipment is that it needs to set up a large number of welding strip material rolls, which increases the cost of the welding equipment.

In view of this, the present invention provides a battery string welding equipment and a welding method, in order to weld back-contact battery sheets (hereinafter referred to as "battery sheets") into strings with only one set of welding tape coils. Hereinafter, the battery string welding equipment and the welding method of the present invention will be exemplarily described respectively through two embodiments.

first embodiment

As shown in FIG. 3 to FIG. 5 , the battery string welding equipment provided in this embodiment includes a welding conveying device 10 , a battery slice laying device 20 , a welding ribbon processing device 30 , a welding ribbon pulling device 40 and a welding device 50 , wherein:

The welding conveying device 10 is used for conveying the battery sheets and the welding ribbon group along a first horizontal direction (the X-axis direction in FIG. 1 ).

The battery sheet laying device 20 is used for laying the N battery sheets on the welding conveying device 10 along the first horizontal direction with their backs facing upwards, so that the polarities of the electrode rows with adjacent battery sheets on the same straight line are opposite.

The welding strip processing device 30 is used for clamping a plurality of welding strips extending along the first horizontal direction, and driving the welding strips to move in a second horizontal direction (the Y-axis direction in FIG. 1 ) perpendicular to the first horizontal direction, In order to realize the position switching of the welding strip between the first welding strip group feeding station and the second welding strip group feeding station, and cutting off the first welding strip group feeding station and the second welding strip group feeding station Ribbon in place to obtain a Ribbon Set. For example, the ribbon cut at the feeding station of the first ribbon group is the odd-numbered ribbon group, and the ribbon cut at the feeding station of the second ribbon group is the even-numbered ribbon Ribbon set.

The welding ribbon pulling device 40 is used for pulling the welding ribbon group at the feeding station of the first welding ribbon group and stacking it on the odd-numbered electrode row corresponding to the battery sheet on the welding conveying device, and for pulling the second welding ribbon group for supplying. The welding belt group at the material station is stacked on the even-numbered electrode row corresponding to the battery sheet on the welding conveying device. That is, the ribbon pulling device 40 alternately obtains the odd-numbered ribbon group and the even-numbered ribbon group that have been cut from the first ribbon group supply station and the second ribbon group supply station, and Complete the lay-up of the welding tape set.

The welding device 50 is used for welding the stacked welding ribbon groups and battery sheets into a string.

It can be seen that through the cooperation of the welding conveying device 10 , the cell laying device 20 , the welding strip processing device 30 , the welding strip pulling device 40 and the welding device 50 , the battery string welding device in this embodiment realizes the back-contact type of battery cells. of welded strings.

In particular, the ribbon processing device 30 in this embodiment can drive the ribbon to move between the feeding station of the first ribbon group and the feeding station of the second ribbon group, so as to ensure that the ribbon pulling device 40 can move from The first welding ribbon group feeding station and the second welding ribbon group feeding station alternately obtain the odd-numbered welding ribbon group and the even-numbered welding ribbon group, and combine the odd-numbered welding ribbon group and the even-numbered welding ribbon group. The strips are staggered and laid on the cell sheets.

In this way, it is only necessary to set up one ribbon material group and release the number of ribbons that is half of the number of electrode rows on the cell, so as to complete the alternate feeding of the odd-numbered ribbon group and the even-numbered ribbon group. Thereby greatly reducing the cost of welding equipment.

As shown in FIG. 3 and FIG. 4 , optionally, the welding strip processing device 30 includes a welding strip clamping mechanism 31 and a welding strip cutting mechanism 32 , wherein: the welding strip clamping mechanism 31 is used for clamping the welding strip and driving the welding strip. The belt moves in the second horizontal direction, so as to realize the position switching of the welding belt between the feeding station of the first welding strip group and the feeding station of the second welding belt group. The welding strip cutting mechanism 32 is located at the rear station of the welding strip clamping mechanism 32, which is used for cutting the welding strips at the feeding station of the first welding strip group and the feeding station of the second welding strip group to obtain the corresponding first welding strip. Odd-numbered ribbon groups, even-numbered ribbon groups.

Optionally, the ribbon cutting mechanism 32 can choose from the following three setting modes.

The first setting method:

The ribbon cutting mechanism 32 is connected to the ribbon clamping mechanism 31 , and the ribbon cutting mechanism 32 moves synchronously with the ribbon clamping mechanism 31 in the second horizontal direction. In this way, when the ribbon clamping mechanism 31 moves the ribbon to the feeding station of the first ribbon group or the feeding station of the second ribbon group, the ribbon cutting mechanism 32 immediately performs the cutting action, thereby obtaining the odd number Ribbon group or even-numbered ribbon group.

The second setting method:

The ribbon cutting mechanism 32 includes a first cutting execution part and a second cutting execution part, wherein the first cutting execution part is arranged at the first welding ribbon group feeding station, and is used for cutting the first welding ribbon group feeding station The welding strip at the second welding strip group is provided at the feeding station of the second welding strip group, and the second cutting execution part is used for cutting the welding strip at the feeding station of the second welding strip group.

That is, when the ribbon clamping mechanism 31 moves the ribbon to the first ribbon group feeding station, the first cutting execution unit performs a cutting operation, thereby obtaining an odd-numbered ribbon group. When the ribbon clamping mechanism 31 moves the ribbon to the feeding station of the second ribbon group, the second cutting execution unit performs the cutting action, thereby obtaining the even-numbered ribbon group.

The third setting method:

The cutting execution part of the ribbon cutting mechanism 32 straddles the feeding station of the first ribbon group and the feeding station of the second ribbon group, and the cutting execution part of the ribbon cutting mechanism is used to cut off the feeding of the first ribbon group The welding strip at the station is also used to cut the welding strip at the feeding station of the second welding strip group.

That is, a wider cutting execution part is provided to ensure that the cutting execution part spans the first welding strip group feeding station and the second welding strip group feeding station. In this way, when the ribbon clamping mechanism 31 moves the ribbon to the feeding station of the first ribbon group, the cutting execution part executes the cutting action, and the cutting execution part cuts off the welding at the position of the feeding station of the first ribbon group. The strip thus obtains the odd-numbered welding strip group, and the part of the cutting execution part located at the feeding station of the second welding strip group is cut empty. When the ribbon clamping mechanism 31 moves the ribbon to the feeding station of the second ribbon group, the cutting execution part executes the cutting action, and the cutting execution part cuts the ribbon at the position at the feeding station of the second ribbon group Thereby, the even-numbered welding strip group is obtained, and the part of the cutting execution part located at the feeding station of the first welding strip group is empty-cut.

3 and 4, optionally, the ribbon pulling device 40 in this embodiment includes a first ribbon pulling mechanism 41 and a second ribbon pulling mechanism 42, wherein:

The first welding ribbon pulling mechanism 41 is used for pulling the welding ribbon moved to the feeding station of the first welding ribbon group, and laying the welding ribbon group at the feeding station of the first welding ribbon group to the welding conveying device 10 superior.

The second welding ribbon pulling mechanism 42 is used for pulling the welding ribbon moved to the second welding ribbon group feeding station, and laying the welding ribbon group at the second welding ribbon group feeding station to the welding conveying device 10 on.

The first welding strip pulling mechanism 41 and the second welding strip pulling mechanism 42 alternately pull the welding strip, and implement the laying of the first welding strip group and the second welding strip group, thereby greatly improving the welding strip laying. efficiency.

In some other embodiments, the ribbon pulling device 40 is an integral structure, which includes a mounting bracket and a plurality of first chucks and a plurality of second chucks staggered on the mounting bracket, wherein: the first chuck It is used for pulling the welding strip at the feeding station of the first welding strip group, and laying the welding strip group at the feeding station of the first welding strip group on the welding conveying device. The second chuck is used for pulling the welding ribbon at the feeding station of the second welding ribbon group, and laying the welding ribbon group at the feeding station of the second welding ribbon group on the welding conveying device 10 .

Optionally, the battery string welding equipment in this embodiment further includes a welding ribbon unwinding device and a flux coating device, wherein: the welding ribbon unwinding device includes a mounting plate and a plurality of discharging trays arranged on the mounting plate, each Each unwinding tray supports a roll of soldering tape and unloads a soldering tape. After the solder ribbon discharged from the material tray passes through the flux coating device, it then penetrates into the solder ribbon processing device 30, and the flux coating device is used to apply the flux to the solder ribbon.

The automatic feeding of the welding strip is realized by setting the welding strip unwinding device. In this embodiment, the total number of unwinding trays in the ribbon unwinding device is half of the number of electrode rows on the battery sheet. For example, the cell shown in Figure 1 is provided with 18 electrode rows. Correspondingly, the ribbon unwinding device in this embodiment is provided with 9 material coils. In this way, the ribbon unwinding device can simultaneously unwind 9 ribbons, and each odd number obtained after being processed by the ribbon processing device 30 is obtained. The welding strip group and the even-numbered welding strip group each include 9 welding strip segments.

Optionally, the battery chip laying device in this embodiment includes a battery chip feeding mechanism, a battery chip conveying mechanism, a battery chip positioning platform and a transport mechanism, wherein the battery chip feeding mechanism is used for feeding the battery chips in the battery box to the battery. On the battery slice conveying mechanism, the battery slice conveying mechanism is used to transport the battery slices to the battery slice positioning platform, the battery slice positioning platform is used to implement the positioning of the battery slices, and the transport mechanism is used to pick up the battery slices from the battery slice positioning platform. And place the cells on the welding conveyor.

It can be seen that through the cooperation of the cell feeding mechanism, the cell conveying mechanism, the cell positioning platform and the handling mechanism, the cell placement device realizes the automatic feeding, conveying, positioning and laying of the cell.

Optionally, the cell positioning platform is further provided with a regularization mechanism, and the regularization mechanism is used to implement regularization of the cells on the cell positioning platform.

Optionally, the cell placement device further includes a cell rotation mechanism disposed on the cell conveying mechanism, and the cell rotation mechanism is used to rotate the conveyed subsequent cell relative to the preceding cell by 180°. In this way, it can be ensured that the polarities of the electrode rows on the same straight line are opposite to each other.

Optionally, in this embodiment, the conveying mechanism is configured to be able to pick up a battery slice and a tool at the same time, place the picked-up battery slice on the welding conveying device 10 , and place the picked-up tool on the welding conveying device 10 . on or on the corresponding battery sheet to compress the corresponding welding ribbon group.

In this way, the conveying mechanism realizes the synchronous laying of the cell and the tool, and it completes the laying of one tool while completing the laying of one cell. On the one hand, the laying efficiency is improved, and on the other hand, it is ensured that the laid ribbon group can be pressed on the corresponding cell in time to prevent the ribbon group from deviating from the electrode row.

Of course, in other embodiments, a separate pressing device may be additionally provided to compress the stacked ribbon packs and battery sheets, so as to ensure that the ribbon packs are pressed against the corresponding battery sheets, thereby ensuring the welding effect , to prevent virtual welding. Optionally, in these embodiments, the pressing device includes a tooling conveying mechanism, a tooling stacking mechanism, a tooling and a tooling removing mechanism, wherein: the tooling conveying mechanism is arranged on the side of the welding conveying device 10, and the tooling conveying mechanism 10 uses For circulating conveying tooling. The tool stacking mechanism is used to transport the tooling on the tooling conveying mechanism to the welding conveying device 10 to compress the stacked welding belt groups and battery sheets, and the tooling removal mechanism is used to transport the tooling from the welding conveying device 10 back. on the tooling conveying mechanism.

Through the cooperation of the tooling conveying mechanism, the tooling stacking mechanism, and the tooling removal mechanism, the tooling is automatically placed on the welding conveying device 10 to realize the pressing of the welding belt group and the battery sheet, and after the welding is completed, the tooling is automatically The tooling is transported back to the tooling conveying mechanism to realize the recycling of the tooling.

Second Embodiment

The battery string welding method provided in this embodiment can be implemented by the battery string welding arrangement in the foregoing first embodiment. Specifically, the battery string welding method includes:

Along the first horizontal direction (such as the X-axis direction), place the N battery sheets with their backs facing upwards on the welding conveying device conveyed along the first horizontal direction, and make the polarity of the electrode row with the adjacent battery sheets on the same straight line. on the contrary.

Clamp a plurality of welding strips extending along the first horizontal direction, and drive the welding strips to move in the second horizontal direction (such as the Y-axis direction) perpendicular to the first horizontal direction, so as to realize the welding strips in the first welding strip group. The positions between the feeding station and the second welding ribbon group feeding station are switched, and the welding ribbons at the first welding ribbon group feeding station and the second welding ribbon group feeding station are cut to obtain the welding ribbon group.

Pull the welding ribbon group at the feeding station of the first welding ribbon group and stack it on the odd-numbered electrode row corresponding to the cell on the welding conveying device, and pull the welding ribbon group at the feeding station of the second welding ribbon group and put it on the welding conveyor. Stacked on the even-numbered electrode row corresponding to the battery sheet on the welding conveying device.

Weld the stacked ribbon packs and cells into strings.

The battery string finally obtained by the present invention is formed by welding N pieces of battery pieces through N+1 welding strip groups, wherein: the first welding strip group is the head only welded on the first battery piece (head battery piece) The N+1 welding strip set is the tail welding strip set only welded on the Nth cell (the tail cell), and the remaining N-1 welding strip sets are used to connect the adjacent two Cell.

In order to ensure that the laid ribbon group can be pressed on the corresponding cell in a timely manner and prevent the ribbon group from deviating from the electrode row, optionally, N cells and N+1 ribbon groups are laid. During the process, the laying of N+1 tooling is completed. specific:

While placing the second cell on the welding conveyor, place the first tool on the welding conveyor to compress the first half of the first welding ribbon group.

While laying the i-th cell sheet to the welding conveying mechanism, place the i-1th tooling on the i-2th cell sheet to compress the i-th cell sheet stacked on the i-2th cell sheet The second half of the two ribbon groups and the first half of the i-1 th ribbon group, where i is any natural number from 3 to N.

Place the N th tooling on the N-1 th battery sheet to compress the second half of the N-1 th welding ribbon group and the first half of the N th welding ribbon group on the N-1 th battery sheet.

Place the N+1 th tooling on the N th cell sheet to compress the second half of the N th welding ribbon group and the first half of the N+1 th welding ribbon group on the N cell sheets.

In order to make the above-mentioned laying process more clearly understood by those skilled in the art, the following will exemplarily describe the laying process of the battery sheet, the welding ribbon group and the tooling in a specific embodiment with reference to FIG. 6 to FIG. 12 . The battery string in includes 10 battery slices, that is, N=10.

First, as shown in Figure 6, the first cell is placed on the welding conveyor.

Next, as shown in Figure 7, the first welding ribbon group is laid, so that the second half of the first welding ribbon group is located on the first electrode row of the first cell, and the first half is located on the welding conveyor. .

Next, as shown in FIG. 8 , while the second cell is placed on the welding conveying mechanism, the first tool is placed on the welding conveying device to compress the first half of the first welding belt group.

Next, as shown in Figure 9, the second welding ribbon group is laid so that the first half and the second half of the second welding ribbon group are located in the second electrode row of the first cell and the second cell, respectively. superior.

Next, as shown in Figure 10, while placing the third cell on the welding conveying mechanism, place the second tool on the first cell to compress the first cell stacked on the first cell. The second half of 1 ribbon group and the first half of 2 ribbon groups.

Next, as shown in Figure 11, lay the third welding ribbon group, and make the first half and the second half of the third welding ribbon group respectively located in the first electrode row of the second cell and the third cell. superior.

According to the above rules, the 4th to 10th cell sheets and the 3rd to 9th tooling should be laid at the same time, and the 4th to 11th ribbon sets should be laid.

Finally, as shown in Figure 12, place the 10th tooling on the 9th cell to compress the second half of the 9th ribbon group and the first half of the 10th ribbon group on the 9th cell , place the 11th tooling on the 10th cell to compress the second half of the 10th welding strip group and the first half of the 11th welding strip group on the 10 cells.

At this point, the laying of all cells, tooling and ribbon groups has been completed. The welding conveying mechanism conveys the laid cells, tooling and welding belt group to the welding station for welding.

The invention has been described above in sufficient detail with certain particularities. Those of ordinary skill in the art should understand that the descriptions in the embodiments are only exemplary, and all changes made without departing from the true spirit and scope of the present invention should belong to the protection scope of the present invention. The claimed scope of the present invention is defined by the claims, rather than by the above description in the embodiments.

Claims (13)

1. The utility model provides a battery cluster welding equipment for weld the battery piece into the cluster, the back of battery piece is equipped with first electrode row and the second electrode row of crisscross arrangement, its characterized in that, battery cluster welding equipment is including welding conveyor, battery piece shop device, welding and take processing apparatus, welding and take draw gear and welding set, wherein:

the welding conveying device is used for conveying the battery piece and the welding strip group along a first horizontal direction;

the battery piece laying device is used for laying N battery pieces on the welding conveying device with the back surfaces facing upwards along the first horizontal direction, and the polarities of the electrode rows of the adjacent battery pieces on the same straight line are opposite;

the welding strip processing device is used for clamping a plurality of welding strips extending along the first horizontal direction, driving the welding strips to move in a second horizontal direction perpendicular to the first horizontal direction, so that position switching of the welding strips between a first welding strip group feeding station and a second welding strip group feeding station is realized, and the welding strips at the first welding strip group feeding station and the second welding strip group feeding station are cut off to obtain welding strip groups;

the welding strip traction device is used for drawing the welding strip group at the first welding strip group feeding station and stacking the welding strip group on the odd electrode rows of the corresponding battery piece on the welding conveying device, and is used for drawing the welding strip group at the second welding strip group feeding station and stacking the welding strip group on the even electrode rows of the corresponding battery piece on the welding conveying device;

the welding device welds the stacked welding strip group and the battery piece into a string.

2. The battery string welding apparatus according to claim 1, wherein the solder strip processing device includes a solder strip clamping mechanism and a solder strip cutting mechanism, wherein:

the welding strip clamping mechanism is used for clamping a welding strip and driving the welding strip to move in the second horizontal direction so as to realize position switching of the welding strip between the first welding strip group feeding station and the second welding strip group feeding station;

the welding strip cutting mechanism is located at a subsequent station of the welding strip clamping mechanism and used for cutting off the welding strips at the feeding station of the first welding strip group and the feeding station of the second welding strip group to obtain a welding strip group.

3. The battery string welding apparatus according to claim 2, wherein the solder ribbon cut-off mechanism is connected to the solder ribbon clamping mechanism, the solder ribbon cut-off mechanism moving in the second horizontal direction with the solder ribbon clamping mechanism; or,

the welding strip cutting mechanism comprises a first cutting execution part and a second cutting execution part, the first cutting execution part is arranged at the first welding strip group feeding station and used for cutting off the welding strip at the first welding strip group feeding station, and the second cutting execution part is arranged at the second welding strip group feeding station and used for cutting off the welding strip at the second welding strip group feeding station; or,

the cutting execution part of the solder strip cutting mechanism crosses the first solder strip group feeding station and the second solder strip group feeding station, and the cutting execution part of the solder strip cutting mechanism is configured to be used for cutting off the solder strip at the first solder strip group feeding station and is configured to cut off the solder strip at the second solder strip group feeding station.

4. The battery string welding apparatus of claim 1, wherein the solder ribbon pulling device comprises a first solder ribbon pulling mechanism and a second solder ribbon pulling mechanism, wherein:

the first welding strip traction mechanism is used for drawing the welding strips moving to the first welding strip group feeding station and laying the welding strip groups at the first welding strip group feeding station on the welding conveying device;

the second welding strip traction mechanism is used for drawing the welding strips moving to the second welding strip group feeding station and laying the welding strip groups at the second welding strip group feeding station onto the welding conveying device.

5. The battery string welding apparatus of claim 1, wherein the solder ribbon pulling device comprises a mounting bracket and a plurality of first clips and a plurality of second clips disposed alternately on the mounting bracket, wherein:

the first chuck is used for drawing the welding strips at the first welding strip group feeding station and laying the welding strip groups at the first welding strip group feeding station on the welding conveying device;

the second chuck is used for drawing the welding strips at the second welding strip group feeding station and laying the welding strip groups at the second welding strip group feeding station onto the welding conveying device.

6. The battery string welding apparatus of claim 1, further comprising a solder ribbon unwinding device and a flux coating device, wherein:

the solder strip unwinding device comprises an installation plate and a plurality of unwinding disks arranged on the installation plate, wherein each unwinding disk supports a coil of solder strip and discharges a solder strip;

and the soldering flux coating device is used for coating soldering flux on the soldering strip.

7. The battery string welding device according to claim 1, wherein the battery piece placement device comprises a battery piece feeding mechanism, a battery piece conveying mechanism, a battery piece positioning platform and a carrying mechanism, wherein:

the battery piece feeding mechanism is used for feeding battery pieces in a battery box onto the battery piece conveying mechanism, the battery piece conveying mechanism is used for conveying the battery pieces onto a battery piece positioning platform, the battery piece positioning platform is used for positioning the battery pieces, and the carrying mechanism is used for picking up the battery pieces from the battery piece positioning platform and laying the battery pieces onto the welding conveying device;

the battery piece positioning platform is provided with a regulating mechanism, and the regulating mechanism is used for regulating the battery pieces on the battery piece positioning platform.

8. The battery string welding apparatus of claim 7, wherein the handling mechanism is configured to simultaneously pick up one battery piece and one tooling, lay the picked up battery piece onto the welding conveyor, and place the picked up tooling onto the welding conveyor or a corresponding battery piece to compress a corresponding set of solder ribbons.

9. The battery string welding apparatus according to claim 1, wherein the battery sheet placement device further comprises a battery sheet rotating mechanism provided on the battery sheet conveying mechanism, the battery sheet rotating mechanism being configured to rotate a conveyed succeeding battery sheet by 180 ° with respect to a preceding battery sheet.

10. The battery string welding apparatus according to claim 1, further comprising a pressing device for pressing the stacked ribbon assembly and the battery sheet.

11. The battery string welding device according to claim 10, wherein the pressing device includes a tool conveying mechanism, a tool stacking mechanism, a tool, and a tool removing mechanism, wherein:

the tool conveying mechanism is arranged on the side of the welding conveying device and used for circularly conveying the tool;

the tool stacking mechanism is used for conveying the tools on the tool conveying mechanism to the welding conveying device so as to compress the stacked welding strip group and the stacked battery piece;

the tool carrying-away mechanism is used for carrying the tool from the welding conveying device back to the tool conveying mechanism.

12. A cell string welding method is used for welding cell pieces into a string, and a first electrode row and a second electrode row which are arranged in a staggered mode are arranged on the back of each cell piece, and is characterized by comprising the following steps:

laying N battery pieces on a welding conveying device conveyed along a first horizontal direction with the back surfaces facing upwards, and enabling the polarities of electrode rows of adjacent battery pieces on the same line to be opposite;

clamping a plurality of welding strips extending along the first horizontal direction, driving the welding strips to move in a second horizontal direction perpendicular to the first horizontal direction, so as to realize position switching of the welding strips between a first welding strip group feeding station and a second welding strip group feeding station, and cutting off the welding strips at the first welding strip group feeding station and the second welding strip group feeding station to obtain a welding strip group;

drawing the welding strip group at the first welding strip group feeding station and stacking the welding strip group on the odd-numbered electrode row of the corresponding battery piece on the welding and conveying device, and drawing the welding strip group at the second welding strip group feeding station and stacking the welding strip group on the even-numbered electrode row of the corresponding battery piece on the welding and conveying device;

and welding the stacked welding strip group and the battery plate into a string.

13. The battery string welding method of claim 12, further comprising:

place N +1 frock to weld conveyor goes up or on the battery piece that corresponds with compressing tightly corresponding solder strip group, wherein:

placing a 1 st tool on the welding conveying device while laying the 2 nd cell piece to the welding conveying device so as to compress the front half section of the 1 st welding strip group;

when the ith battery piece is laid on the welding conveying device, an (i-1) th tool is placed on an (i-2) th battery piece to press the rear half section of an (i-2) th welding strip group and the front half section of an (i-1) th welding strip group which are stacked on the (i-2) th battery piece, wherein i is any natural number from 3 to N;

placing the Nth tool on the (N-1) th battery plate to tightly press the back half section of the (N-1) th welding strip group and the front half section of the Nth welding strip group on the (N-1) th battery plate;

place N +1 a frock on the nth battery piece to compress tightly the first half section of the first welding band group of nth and the first half section of the first welding band group of (N + 1) th on the nth battery piece.

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