Battery stringing device

Abstract

The utility model provides a battery stringing device. The battery stringing device comprises a battery unit supply mechanism, a battery unit laying mechanism, a welding strip laying mechanism, a series connection conveying line and a series connection mechanism. The battery unit supply mechanism is configured to supply a battery unit, and the battery unit comprises a battery piece and a film strip. And the battery unit laying mechanism is configured to pick up the battery units from the battery unit supply mechanism, and is configured to be matched with the welding strip laying mechanism to lay the battery units and the welding strip groups on the serial connection conveying line according to a serial connection rule. And the serial connection conveying line is configured to convey the laid battery units and solder strip groups to a serial connection station. And the series connection mechanism is located at the series connection station, and the series connection mechanism is configured to enable the welding strip group to be connected to the corresponding battery piece. According to the battery stringing device, the battery units and the welding strip groups are laid on the stringing conveying line according to the preset stringing rule, so that the film strips enter the positions among the pieces in the battery stringing laying process, and the stringing efficiency and the stringing quality are improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic cell assembly production equipment, and specifically to a cell stringing device. Background Art

[0002] In order to avoid the soldering ribbon causing local stress on the edge of the battery cell during the lamination of the battery string components, which may lead to hidden cracks in the battery cell, a film strip can be set between two adjacent battery cells during the production of the battery string to buffer the stress of the soldering ribbon on the battery cell.

[0003] The existing process for stringing cells with membrane strips involves first stringing the cells together with the soldering ribbons, then inserting the membrane strips between the cells in the string. Because the cells and soldering ribbons are already connected, inserting the membrane strips requires lifting one of the two adjacent cells to create a gap for insertion. This process is not only cumbersome to operate but also prone to damaging the cells. Summary of the Invention

[0004] In order to solve the above technical problems, the present application provides a battery string device, which adopts the following technical solutions:

[0005] A battery stringing device includes a battery cell supply mechanism, a battery cell laying mechanism, a welding ribbon laying mechanism, a stringing conveyor line, and a stringing mechanism, wherein:

[0006] The battery cell supply mechanism is configured to supply battery cells, wherein the battery cells include battery cells and film strips, wherein the first end of the battery cell is stacked on the upper side of the film strip, or the film strip is stacked on the upper side of the second end of the battery cell, and the second end of the battery cell and the first end of the battery cell are two opposite ends of the battery cell;

[0007] The battery cell laying mechanism is configured to pick up battery cells from the battery cell supply mechanism, and is configured to cooperate with the solder ribbon laying mechanism to lay the battery cells and solder ribbon groups onto the stringing conveyor line according to a predetermined stringing rule;

[0008] The stringing conveyor line is configured to convey the laid-out battery cells and welding ribbon groups to the stringing station;

[0009] The serial connection mechanism is located at the serial connection station, and is configured to connect the welding ribbon group to the corresponding battery slices.

[0010] The battery stringing device provided in this application uses a battery cell supply mechanism to supply battery cells formed by stacking battery cells and film strips. The battery cell laying mechanism cooperates with the welding ribbon laying mechanism to lay the battery cells and welding ribbon groups onto the stringing conveyor line according to a predetermined stringing rule, thereby achieving the laying of battery cells and welding ribbon groups in a string and ensuring that the film strips are placed in the corresponding positions between the cells.

[0011] Compared with the existing battery stringing method, the battery stringing device of the present application is used to implement the battery cell stringing operation, eliminating the subsequent film insertion operation, thereby improving the battery stringing efficiency and stringing quality.

[0012] In some embodiments, the battery cell supply mechanism includes a battery cell loading mechanism, a film strip loading mechanism, a pre-bonding mechanism, a transfer mechanism and a conveying mechanism; the battery cell loading mechanism and the film strip loading mechanism are configured to stack the battery cells and film strips on the carrying surface of the pre-bonding mechanism to form battery cells, wherein the battery cells in the battery cells are bonded to the film strips; the transfer mechanism is configured to transfer the battery cells to the conveying mechanism, and the conveying mechanism is configured to convey the battery cells toward the battery cell laying mechanism; the battery cell laying mechanism is configured to pick up the battery cells from the conveying mechanism.

[0013] Through the cooperation of the battery cell feeding mechanism, the film strip feeding mechanism and the pre-bonding mechanism, the battery cells and film strips are automatically stacked into battery cells, and the film strips are bonded to the battery cells. By setting up a transfer mechanism, the automatic transfer of the battery cells from the pre-bonding mechanism to the conveying mechanism is realized. Since the battery cells and the film strips in the battery cells have been pre-bonded, the conveying mechanism can avoid displacement between the film strips and the battery cells when conveying the battery cells to the battery cell laying mechanism, when the battery cell laying mechanism lays the battery cells on the serial connection conveyor line, and when the serial connection conveyor line conveys the laid battery cells and the welding ribbon group to the serial connection station. In addition, since the film strips are bonded to the battery cells, the battery cell laying mechanism only needs to absorb the battery cells to lay the battery cells on the serial connection conveyor line, thereby reducing the structural complexity and cost of the battery cell laying mechanism.

[0014] In some embodiments, the first surface of the film strip is adhesive, and when the battery cell and the film strip are stacked on the supporting surface of the pre-bonding mechanism, the first surface of the film strip is bonded to the battery cell.

[0015] Because the first side of the film strip is adhesive, when the battery cells and film strip are stacked on the supporting surface of the pre-bonding mechanism, the first side of the film strip will automatically adhere to the battery cells. Therefore, there is no need to set up an additional heating element to heat the film strip to release the adhesive, thereby reducing the cost of battery string assembly.

[0016] In some embodiments, the surface of the film strip is non-sticky at room temperature; a first heating element is provided on the film strip feeding mechanism, which is configured to heat the film strip so that the film strip releases its stickiness and then adheres to the battery cell; or, a second heating element is provided on the battery cell feeding mechanism, which is configured to heat the battery cell, and heats the film strip through the battery cell so that the film strip releases its stickiness and then adheres to the battery cell; or, a third heating element is provided on the pre-bonding mechanism, which is configured to heat the film strip and / or the battery cell so that the film strip releases its stickiness and then adheres to the battery cell.

[0017] Three heating methods for film strips that are non-sticky at room temperature are provided, all of which can heat the film strips so that the film strips release their stickiness and adhere to the battery cells.

[0018] In some embodiments, a third heating element is provided inside the carrying surface of the pre-bonding mechanism, and the carrying surface of the pre-bonding mechanism is used to heat the film strips and / or battery cells; or, a third heating element is provided above the carrying surface of the pre-bonding mechanism, and the third heating element is configured to move to the top of the battery cell and heat the film strips and / or battery cells after the battery cells and film strips are stacked on the carrying surface of the pre-bonding mechanism.

[0019] Placing the third heating element inside the support surface saves installation space and prevents interference between the third heating element and the cell and film strip loading mechanisms. Placing the third heating element above the support surface facilitates installation and maintenance of the third heating element.

[0020] In some embodiments, the supporting surface of the pre-bonding mechanism is provided with first adsorption holes for adsorbing the film strips and the battery cells.

[0021] When the first end of the battery cell is stacked on the upper side of the film strip, the battery cell can be adsorbed through the first adsorption hole, so that the first end of the battery cell is pressed tightly against the film strip, thereby ensuring that the film strip and the first end of the battery cell are firmly bonded.

[0022] In some embodiments, the battery cell supply mechanism includes a battery cell loading mechanism, a membrane strip loading mechanism and a conveying mechanism; the battery cell loading mechanism and the membrane strip loading mechanism are configured to stack the battery cells and membrane strips onto the conveying surface of the conveying mechanism to form battery cells; the conveying mechanism is also configured to convey the battery cells to the battery cell laying mechanism; the battery cell laying mechanism picks up the battery cells from the conveying mechanism.

[0023] Through the cooperation of the battery cell loading mechanism and the membrane strip loading mechanism, the battery cells and membrane strips are automatically stacked on the conveying mechanism to form battery cells. The conveying mechanism directly transports the battery cells to the battery cell laying mechanism, thereby improving the loading efficiency of the battery cell supply mechanism.

[0024] In some embodiments, the first surface of the film strip is sticky, and when the battery cells and the film strip are stacked on the conveying surface of the conveying mechanism, the first surface of the film strip is adhered to the battery cells.

[0025] Because the first side of the film strip is sticky, when the battery cells and film strip are stacked on the conveyor mechanism, the first side of the film strip automatically adheres to the battery cells. Since the film strip adheres to the battery cells, displacement between the film strip and the battery cells can be avoided when the conveyor mechanism conveys the battery cells to the battery cell placement mechanism, when the battery cell placement mechanism places the battery cells on the stringing conveyor line, and when the stringing conveyor line conveys the laid-out battery cells and welding ribbon assembly to the stringing station. Furthermore, because the film strip adheres to the battery cells, the battery cell placement mechanism only needs to absorb the battery cells to place the battery cells on the stringing conveyor line, thereby reducing the structural complexity and cost of the battery cell placement mechanism.

[0026] In some embodiments, the surface of the film strip is non-sticky at room temperature; a first heating element is provided on the film strip feeding mechanism, which is configured to heat the film strip so that the film strip releases its stickiness and adheres to the battery cell; or, a second heating element is provided on the battery cell feeding mechanism, which is configured to heat the battery cell, and heats the film strip through the battery cell so that the film strip releases its stickiness and adheres to the battery cell; or, a fourth heating element is provided on the conveying mechanism, which is configured to heat the film strip and / or the battery cell so that the film strip releases its stickiness and adheres to the battery cell.

[0027] Three heating methods for film strips that are non-sticky at room temperature are provided, all of which can heat the film strips so that the film strips release their stickiness and adhere to the battery cells.

[0028] In some embodiments, the fourth heating element is a heating base plate arranged below the conveying surface of the conveying mechanism, and the heating base plate is used to heat the film strips and / or battery cells located on the conveying surface; or, the fourth heating element is any one of a heating lamp box, a hot pressing assembly and a hot air assembly arranged above the conveying surface of the conveying mechanism, and the fourth heating element is configured to heat the film strips and / or battery cells.

[0029] Placing the fourth heating element below the conveying surface of the conveyor mechanism saves installation space and prevents interference between the fourth heating element and the battery cell laying mechanism, welding ribbon laying mechanism, etc. Placing the fourth heating element above the conveying surface of the conveyor mechanism facilitates installation and maintenance of the fourth heating element.

[0030] In some embodiments, the conveying surface of the conveying mechanism is provided with second adsorption holes for adsorbing the film strips and battery cells.

[0031] When the first end of the battery cell is stacked on the upper side of the film strip, the battery cell can be adsorbed through the second adsorption hole, so that the first end of the battery cell is pressed against the film strip, thereby ensuring that the film strip and the first end of the battery cell are firmly bonded; at the same time, the second adsorption hole can also ensure the relative position of the battery cell and the film strip during transportation to prevent deviation.

[0032] In some embodiments, the battery cell laying mechanism includes a driving part, a battery cell suction part and a film strip suction part; the driving part is configured to drive the battery cell suction part and the film strip suction part to move synchronously, so as to drive the battery cell suction part and the film strip suction part to respectively absorb the battery cells and film strips of the battery cells, and lay the battery cells on the serial conveyor line; or, the battery cell laying mechanism includes a driving part and a battery cell suction part; the driving part is configured to drive the battery cell suction part to move, so as to drive the battery cell suction part to absorb the battery cells of the battery cells, and lay the battery cells on the serial conveyor line.

[0033] For situations where the cell and film strips haven't been pre-bonded, the battery cell placement mechanism, which includes a drive unit, a cell suction unit, and a film strip suction unit, ensures that the mechanism can simultaneously absorb the cell and film strips in the cell, thereby placing the cell on the serial conveyor line. For situations where the cell and film strips have been pre-bonded, the mechanism only needs to absorb the cell using the cell suction unit to place the cell on the serial conveyor line, thereby reducing the structural complexity and equipment cost of the mechanism.

[0034] In some embodiments, the serial connection mechanism is at least one of a heating mechanism and a light curing mechanism.

[0035] In the conventional case of connecting cells in series using only solder ribbons, a heating mechanism is used to heat the cells and solder ribbons, melting the solder on the ribbon surface, thereby creating a metallized connection between the ribbon and the corresponding cell, completing the soldering of the cells into a string. In addition, if the cell and film strips are not pre-bonded, the heating mechanism can also simultaneously heat the film strips, releasing their stickiness after heating, allowing them to bond between adjacent cells.

[0036] In the case where a light-curing adhesive (such as UV adhesive) is applied to the surface of the battery cell, a light-curing mechanism is used to irradiate the battery cell and the soldering ribbon. After the light-curing adhesive is cured, the soldering ribbon can be bonded to the corresponding battery cell to complete the battery cell series connection. If the battery cell and the film strip have been pre-bonded, a heating mechanism can be optionally set up. The light-curing adhesive bonds the soldering ribbon to the corresponding battery cell. The solder on the surface of the soldering ribbon is heated and melted by the heating mechanism, thereby welding the soldering ribbon to the corresponding battery cell. This can further improve the connection strength between the soldering ribbon and the battery cell, and ultimately improve the quality of the battery string. If the battery cell and the film strip are not pre-bonded, a heating mechanism must be set up. The heating mechanism must at least heat the film strip so that the film strip releases its viscosity after heating so that it can be bonded between adjacent battery cells.

[0037] In the case of a cell surface coated with thermosetting adhesive, a heating mechanism is used to heat the cell and solder ribbon, allowing the thermosetting adhesive to cure and then bond the ribbon to the corresponding cell. Furthermore, the heating mechanism can also heat the solder ribbon and film strip, melting the solder on the ribbon surface and then welding the ribbon to the corresponding cell. The film strip is also heated to release its stickiness, allowing it to bond between adjacent cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic structural diagram of a battery string device in the first embodiment of the present application;

[0039] Figure 2 This is a schematic structural diagram of a battery string device in a second embodiment of the present application;

[0040] Figure 3 Schematic diagram of the structure of a battery string device in the third embodiment of the present application;

[0041] Figure 4 This is a schematic structural diagram of a battery unit in one embodiment of the present application;

[0042] Figure 5 This is a schematic structural diagram of a battery unit in another embodiment of the present application;

[0043] Figure 6 This is a schematic structural diagram of the first type of battery string laid out in this application;

[0044] Figure 7 A schematic diagram of the series connection of two adjacent battery cells in the second type of battery string formed in this application;

[0045] Figure 8 This is a schematic diagram of the structure of the third type of battery string laid out in this application;

[0046] Figure 9 This is a schematic diagram of the series connection of two adjacent battery cells in the fourth type of battery string formed in this application.

[0047] Figures 1 to 9 Included are:

[0048] Battery cell supply mechanism 1: battery cell loading mechanism 11, film strip loading mechanism 12, pre-bonding mechanism 13, transfer mechanism 14, conveying mechanism 15, battery cell conveying unit 111, battery cell loading unit 112, film strip conveying unit 121, film strip loading unit 122;

[0049] Battery cell laying mechanism 2: driving part 21, battery cell suction part 22, film strip suction part 23;

[0050] Welding tape laying mechanism 3;

[0051] Connect conveyor line 4 in series;

[0052] Series connection mechanism 5;

[0053] Heating base plate 6;

[0054] Heating light box 7;

[0055] Battery unit 100: battery cell 101, membrane strip 102;

[0056] Welding ribbon set 200. DETAILED DESCRIPTION

[0057] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0058] The existing process for stringing cells with membrane strips involves first stringing the cells together with the soldering ribbons, then inserting the membrane strips between the cells in the string. Because the cells and soldering ribbons are already connected, inserting the membrane strips requires lifting one of the two adjacent cells to create a gap for insertion. This process is not only cumbersome to operate but also prone to damaging the cells.

[0059] In view of this, the present application provides a battery stringing device, which can realize the automatic stringing of battery cells and welding ribbon groups, and during the stringing process, it can make the membrane strips enter the corresponding inter-sheet positions, eliminating the subsequent film insertion operation, thereby improving the stringing efficiency and stringing quality of the battery strings. Figure 1 The battery string device in the first embodiment of the present application is shown. Figure 2 The figure shows a battery string device in the second embodiment of the present application. Figure 3 A battery string device in the third embodiment of the present application is shown.

[0060] like Figures 1 to 3 As shown, the battery stringing device in the embodiment of the present application includes a battery cell supply mechanism 1, a battery cell laying mechanism 2, a welding ribbon laying mechanism 3, a stringing conveyor line 4 and a stringing mechanism 5.

[0061] The battery cell supply mechanism 1 is configured to supply battery cells 100. The battery cell 100 includes a battery sheet and a film strip. In one implementation, Figure 4 As shown, the first end of the battery cell 101 (eg Figure 4 The right end of the film strip 102 is stacked on the upper side of the film strip 102. In another embodiment, as Figure 5 As shown, the film strip 102 is stacked on the second end of the battery cell 101 (eg Figure 5The second end of the battery cell 101 and the first end of the battery cell 101 are two opposite ends of the battery cell 101.

[0062] The battery cell laying mechanism 2 is configured to pick up the battery cells 100 from the battery cell supply mechanism 1, and is configured to cooperate with the welding tape laying mechanism 3 to lay the battery cells 100 and the welding tape group 200 on the stringing conveyor line 4 according to a predetermined stringing rule.

[0063] The stringing conveyor line 4 is configured to convey the laid-out battery cells 100 and the welding ribbon group 200 to the stringing station.

[0064] The serial connection mechanism 5 is located at the serial connection station, and is configured to connect the solder ribbon group 200 to the corresponding battery cell 101 .

[0065] The battery stringing device provided in the embodiment of the present application is composed of a battery cell supply mechanism 1 that supplies battery cells 100 formed by stacking battery cells 101 and film strips 102. The battery cell laying mechanism 2 and the welding tape laying mechanism 3 cooperate with each other to lay the battery cells 100 and the welding tape group 200 onto the stringing conveyor line 4 according to the predetermined stringing rules of the battery cells and the welding tape group, thereby realizing the laying of the battery cells 101 and the welding tape group 200 in a string, and making the film strips 102 enter the corresponding inter-sheet positions. In other words, using the battery stringing device provided in the embodiment of the present application, the film strips 102 enter the corresponding inter-sheet positions during the process of laying the battery cells in a string, thereby eliminating the subsequent film insertion operation and improving the stringing efficiency and stringing quality of the battery strings.

[0066] like Figure 4 and Figure 6 As shown, an optional working process of the battery string device provided in the embodiment of the present application is as follows:

[0067] The battery cell supply mechanism 1 supplies battery cells 100, such as Figure 4 As shown, the battery unit 100 includes a battery cell 101 and a film strip 102 , wherein a first end of the battery cell 101 is stacked on an upper side of the film strip 102 .

[0068] The battery cell laying mechanism 2 cooperates with the solder tape laying mechanism 3 to lay the battery cell 100 and the solder tape group 200 onto the serial conveyor line 4 according to the following stringing rules to obtain Figure 6 Battery string shown.

[0069] First, the welding tape laying mechanism 3 lays the first welding tape group 200 onto the serial conveyor line 4 .

[0070] Next, the battery cell laying mechanism 2 picks up the first battery cell 100 from the battery cell supply mechanism 1 and stacks the battery cell 101 of the first battery cell 100 on the rear section of the first welding ribbon group 200 with the first end of the battery cell 101 of the first battery cell 100 facing forward.

[0071] Next, the solder ribbon laying mechanism 3 overlaps the front portion of the second solder ribbon assembly 200 on the battery cell 101 of the first battery unit 100 .

[0072] Subsequently, the battery cell laying mechanism 2 and the welding ribbon laying mechanism 3 continue to cooperate to complete the laying of the remaining welding ribbon groups 200 and the battery cell units 100 in sequence, as follows:

[0073] The battery cell laying mechanism 2 picks up the i-th battery cell 100 from the battery cell supply mechanism 1, and stacks the battery cell 101 of the i-th battery cell 100 on the rear portion of the i-th welding ribbon group 200, with the first end of the battery cell 101 of the i-th battery cell 100 facing forward, and the membrane strip 102 of the i-th battery cell 100 is at least partially located on the upper side of the second end of the battery cell 101 of the i-1-th battery cell 100.

[0074] Next, the ribbon laying mechanism 3 overlaps the front portion of the i+1th ribbon group 200 on the cell 101 of the i-th battery unit 100, where i is any natural number from 2 to N, and N is the number of cells included in the target battery string, for example Figure 6 In the embodiment shown, N is 4.

[0075] like Figure 5 and Figure 7 As shown, another optional working process of the battery string device provided in the embodiment of the present application is as follows:

[0076] The battery cell supply mechanism 1 supplies battery cells 100, such as Figure 5 As shown, the battery unit 100 includes a battery cell 101 and a film strip 102 , wherein the film strip 102 is stacked on the upper side of the second end of the battery cell 101 .

[0077] The battery cell laying mechanism 2 cooperates with the solder tape laying mechanism 3 to lay the battery cell 100 and the solder tape group 200 onto the serial conveyor line 4 according to the following stringing rules to obtain Figure 7 Battery string shown.

[0078] First, the welding tape laying mechanism 3 lays the first welding tape group 200 onto the serial conveyor line 4 .

[0079] Next, the battery cell laying mechanism 2 picks up the first battery cell 100 from the battery cell supply mechanism 1 and stacks the battery cell 101 of the first battery cell 100 on the rear section of the first welding ribbon group 200 with the first end of the battery cell 101 facing forward.

[0080] Next, the solder ribbon laying mechanism 3 overlaps the front portion of the second solder ribbon assembly 200 on the battery cell 101 of the first battery unit 100 .

[0081] Subsequently, the battery cell laying mechanism 2 and the welding ribbon laying mechanism 3 continue to cooperate to complete the laying of the remaining welding ribbon groups 200 and battery cells 100 in sequence, as follows:

[0082] The battery cell laying mechanism 2 picks up the i-th battery cell 100 from the battery cell supply mechanism 1 and stacks the cell 101 of the i-th battery cell 100 on the rear portion of the i-th welding ribbon group 200, with the first end of the cell 101 of the i-th battery cell 100 facing forward and the film strip 102 of the i-1-th battery cell 100 at least partially located below the first end of the cell 101 of the i-th battery cell 100. Subsequently, the welding ribbon laying mechanism 3 stacks the front portion of the i+1-th welding ribbon group 200 on the i-th battery cell 100. Wherein, i is any natural number from 2 to N, and N is the number of cells included in the target battery string, for example Figure 7 In the embodiment shown, N is 4.

[0083] like Figure 1 As shown, optionally, the battery cell supply mechanism 1 includes a battery cell loading mechanism 11 , a film strip loading mechanism 12 , a pre-bonding mechanism 13 , a transfer mechanism 14 and a conveying mechanism 15 .

[0084] The cell loading mechanism 11 and the film strip loading mechanism 12 are configured to stack the cell 101 and the film strip 102 onto the supporting surface of the pre-bonding mechanism 13 to form a battery cell 100, wherein the cell 101 in the battery cell 100 is bonded to the film strip 102. The transfer mechanism 14 is configured to transfer the battery cell 100 to the conveying mechanism 15, which is configured to convey the battery cell 100 toward the battery cell laying mechanism 2. The battery cell laying mechanism 2 is configured to pick up the battery cell 100 from the conveying mechanism 15.

[0085] The cell loading mechanism 11 may, for example, be composed of a cell conveying portion 111 and a cell loading portion 112, wherein the cell conveying portion 111 is used to convey the cell 101 one by one toward the cell loading portion 112, and the cell loading portion 112 sucks the cell 101 from the cell conveying portion 111 and stacks the sucked cell 101 onto the pre-bonding mechanism 13. The film strip loading mechanism 12 may, for example, be composed of a film strip conveying portion 121 and a film strip loading portion 122, wherein the film strip conveying portion 121 is used to convey the film strips 102 one by one toward the film strip loading portion 122, and the film strip loading portion 122 sucks the film strips 102 from the film strip conveying portion 121 and stacks the sucked film strips 102 onto the pre-bonding mechanism 13.

[0086] It can be seen that through the cooperation of the cell loading mechanism 11, the film strip loading mechanism 12, and the pre-bonding mechanism 13, the cell loading mechanism 11 automatically stacks the cell 101 and the film strip 102 into the battery cell 100, and makes the film strip 102 adhere to the cell 101. The transfer mechanism 13 realizes the position switching of the battery cell 100 from the pre-bonding mechanism 13 to the conveying mechanism 15. Because the cell 101 and the film strip 102 of the battery cell 100 are pre-bonded, the conveying mechanism 15 can prevent the film strip 102 in the battery cell 100 from shifting with the cell 101 when conveying the battery cell 100 to the cell laying mechanism 2, when the cell laying mechanism 2 lays the battery cell 100 on the stringing conveyor line 4, and when the stringing conveyor line 4 conveys the laid battery cell 100 and the welding ribbon group 200 to the stringing station.

[0087] Furthermore, because the film strips 102 of the battery cells 100 are pre-bonded to the battery cells 101, the battery cell placement mechanism 2 only needs to absorb the battery cells to place the battery cells 100 on the serial conveyor line, thereby reducing the structural complexity and cost of the battery cell placement mechanism 100. For example, the battery cell placement mechanism 2 includes a driving unit 21 and a battery cell absorption unit 22, wherein the driving unit 21 is configured to drive the battery cell absorption unit 22 to move, thereby causing the battery cell absorption unit 22 to absorb the battery cell 101 of the battery cell 100 and place the battery cell 100 on the serial conveyor line 4.

[0088] The drive unit 21 can employ various existing drive mechanisms capable of driving the cell suction unit 22 to translate and elevate. For example, it may include a translation drive module and a lift drive module, wherein the lift drive module is connected to the movable component of the translation drive module, and the cell suction unit 22 is connected to the movable component of the lift drive module. The translation drive module is used to drive the cell suction unit 22 to translate, and the lift drive module is used to drive the cell suction unit 22 to elevate. In another example, the drive unit 21 may be a multi-axis robotic arm, and the cell suction unit 22 is connected to the end of the multi-axis robotic arm, which drives the cell suction unit 22 to translate and elevate. The cell suction unit 22 may, for example, employ a suction cup assembly.

[0089] Similarly, since the film strips 102 of the battery cell 100 have been pre-bonded to the battery sheet 101, the transfer mechanism 14 only needs to absorb the battery sheet to transfer the battery cell 100 from the pre-bonding mechanism 13 to the conveying mechanism. Optionally, the transfer mechanism 14 has the same structure as the battery cell laying mechanism 2.

[0090] In some application examples, the first surface of the film strip 102 is adhesive. Because the first surface of the film strip 102 is adhesive, when the battery cells 101 and the film strip 102 are stacked on the supporting surface of the pre-bonding mechanism 13 to form the battery unit 100, the first surface of the film strip 102 can adhere to the battery cells 101 on its own. Therefore, there is no need to provide an additional heating element to heat the film strip 102 to release its adhesiveness, thereby reducing the cost of battery string assembly.

[0091] In some other application examples, the surface of the film strip 102 is non-sticky at room temperature. In order to release the stickiness of the film strip 102 and then adhere it to the battery cell 101, the following three implementation methods can be used:

[0092] First implementation: The film strip feeding mechanism 12 is provided with a first heating element. In this way, the film strip feeding mechanism 12 can heat the film strips 102 while stacking the film strips 102 on the pre-bonding mechanism 13, thereby releasing the adhesiveness of the film strips 102 and bonding them to the battery cell 101. Optionally, when the film strip feeding mechanism 12 is composed of a film strip conveying portion 121 and a film strip feeding portion 122, the first heating element is provided on the film strip feeding portion 122 and / or the film strip conveying portion 121.

[0093] Second implementation: A second heating element is provided on the cell loading mechanism 11. This allows the cell loading mechanism 11 to heat the cell 101 as it is stacked on the pre-bonding mechanism 13. After the cell 101 and film strip 102 are stacked on the pre-bonding mechanism 13, the cell 101 heats the film strip 102, releasing its adhesiveness and adhering it to the cell 101. Optionally, when the cell loading mechanism 11 consists of a cell conveying unit 111 and a cell loading unit 112, the second heating element is provided on the cell loading unit 112 and / or the cell conveying unit 111.

[0094] The third implementation method: A third heating element is provided on the pre-bonding mechanism 13. When the battery cell 101 and the film strip 102 are stacked on the pre-bonding mechanism 13, the pre-bonding mechanism 13 heats the film strip 102 and / or the battery cell 101 so that the film strip 102 releases its viscosity and is bonded to the battery cell 101.

[0095] Regarding the third implementation, in an optional embodiment, a third heating element is disposed within the support surface of the pre-bonding mechanism 13. The third heating element can be, for example, a heating rod or heating wire. Placing the third heating element within the support surface of the pre-bonding mechanism 13 saves installation space and prevents interference between the third heating element and the cell loading mechanism 11 and the film strip loading mechanism 12.

[0096] In another optional embodiment, the third heating element is arranged above the carrying surface of the pre-bonding mechanism 13, and the third heating element is configured to move to the top of the stacked battery cell 100 after the battery cell 101 and the film strip 102 are stacked on the carrying surface of the pre-bonding mechanism 13, and heat the film strip 102 and / or the battery cell 101 of the battery cell 100. Providing the third heating element above the carrying surface of the pre-bonding mechanism 13 facilitates the installation and maintenance of the third heating element. The third heating element can be, for example, a heating light box connected to a mobile module, and the mobile module translates the heating light box to the top of the battery cell 100, thereby heating the film strip 102 and / or the battery cell 101 of the battery cell 100. The third heating element can be, for example, a hot pressing plate connected to a movable module. The movable module first moves the hot pressing plate horizontally to the top of the battery cell 100, and then drives the hot pressing plate downward to contact the battery cell 100, thereby performing hot pressing on the film strip 102 and / or battery cell 101 of the battery cell 100.

[0097] Optionally, the supporting surface of the pre-bonding mechanism 13 is provided with first adsorption holes for adsorbing the film strip 102 and the battery cell 101 .

[0098] The setting of the first adsorption hole can ensure the position accuracy of the film strip 102 and the battery cell 101 of the battery unit 100 when they are stacked. At the same time, in the case where the first end of the battery cell 101 is stacked on the upper side of the film strip 102, the battery cell 101 can be adsorbed through the first adsorption hole, so that the first end of the battery cell 101 is pressed tightly against the film strip 102, thereby ensuring that the film strip 102 is firmly bonded to the first end of the battery cell after releasing its viscosity.

[0099] Optionally, the supporting surface of the pre-bonding mechanism 13 can accommodate multiple battery cells 100. The transfer mechanism 14 can each absorb at least two battery cells 100 from the pre-bonding mechanism 13 and transfer at least two battery cells 100 to the conveying mechanism 15, thereby improving the loading efficiency of the battery cells 100.

[0100] like Figure 2 As shown, optionally, the battery cell supply mechanism 1 includes a battery cell loading mechanism 11 , a film strip loading mechanism 12 and a conveying mechanism 15 .

[0101] The cell loading mechanism 11 and the film strip loading mechanism 12 are configured to stack the cell 101 and the film strip 102 onto the conveying surface of the conveyor mechanism 15 to form the battery cell 100. The conveyor mechanism 15 is also configured to convey the battery cell 100 to the battery cell laying mechanism 2. The battery cell laying mechanism 2 picks up the battery cell 100 from the conveyor mechanism 15.

[0102] It can be seen that through the cooperation of the battery cell loading mechanism 11 and the film strip loading mechanism 12, the battery cell supply mechanism 1 automatically stacks the battery cells 101 and the film strips 102 onto the conveying mechanism 15 to form battery cells 100, and the conveying mechanism 15 directly conveys the battery cells 100 to the battery cell laying mechanism 2, thereby improving the loading efficiency of the battery cell supply mechanism 1.

[0103] The cell feeding mechanism 11 and the film strip feeding mechanism 12 can both adopt the same Figure 1 For the sake of brevity, the same mechanisms in the embodiments will not be repeated here.

[0104] In some application examples, the first surface of the film strip 102 is adhesive. Because the first surface of the film strip 102 is adhesive, when the battery cells 101 and the film strip 102 are stacked on the conveyor mechanism 15 to form the battery unit 100, the first surface of the film strip 102 can adhere to the battery cells 101. Therefore, there is no need to provide an additional heating element to heat the film strip 102 to release the adhesive, thereby reducing the cost of battery string assembly.

[0105] Because the film strips 102 are bonded to the battery cells 101, displacement between the film strips 102 of the battery cells 100 and the battery cells 101 can be avoided during the process of the conveying mechanism 15 conveying the battery cells 100 to the battery cell laying mechanism 2, the process of the battery cell laying mechanism 2 laying the battery cells 100 on the serial connection conveyor line 4, and the process of the serial connection conveyor line 4 conveying the laid battery cells 100 and the welding ribbon group 200 to the serial connection station. In addition, because the film strips 102 are bonded to the battery cells 101, the battery cell laying mechanism 2 only needs to absorb the battery cells 101 to lay the battery cells 100 on the serial connection conveyor line 4, thereby reducing the structural complexity and cost of the battery cell laying mechanism 2.

[0106] In some other application examples, the surface of the film strip 102 is non-sticky at room temperature. In order to release the stickiness of the film strip 102 and then adhere it to the battery cell 101, the following three implementation methods can be used:

[0107] First implementation: The film strip feeding mechanism 12 is provided with a first heating element. In this way, the film strip feeding mechanism 12 can heat the film strips 102 while stacking the film strips 102 on the conveying mechanism 15, thereby releasing the adhesiveness of the film strips 102 and adhering them to the battery cells 101. Optionally, when the film strip feeding mechanism 12 is composed of a film strip conveying portion 121 and a film strip feeding portion 122, a second heating element is provided on the film strip feeding portion 122 and / or the film strip conveying portion 121.

[0108] Second implementation: A second heating element is provided on the cell loading mechanism 11. This allows the cell loading mechanism 11 to heat the cell 101 while stacking the cell 101 onto the conveyor mechanism 15. After the cell 101 and film strip 102 are stacked onto the conveyor mechanism 15, the cell 101 heats the film strip 102, releasing its adhesiveness and adhering it to the cell 101. Alternatively, when the cell loading mechanism 11 consists of a cell conveyor 111 and a cell loading section 112, the second heating element is provided on the cell loading section 112 and / or the cell conveyor 111.

[0109] The third implementation method: A fourth heating element is provided on the conveying mechanism 15. When the battery cell 101 and the film strip 102 are stacked on the conveying mechanism 15, the conveying mechanism 15 heats the film strip 102 and / or the battery cell 101 through the fourth heating element, so that the film strip 102 releases its viscosity and adheres to the battery cell 101. The fourth heating element can be set at any position on the conveying path of the conveying mechanism 15 according to actual needs.

[0110] Regarding the third implementation, in an optional embodiment, the fourth heating element is a heating base plate 6 disposed below the conveying surface of the conveyor mechanism 15. The heating base plate 6 is used to heat the film strips 102 and / or battery cells 101 located on the conveying surface. Placing the fourth heating element below the conveying surface of the conveyor mechanism 15 saves installation space and prevents interference between the fourth heating element and the battery cell laying mechanism 2, the solder ribbon laying mechanism 3, and the like.

[0111] In another optional embodiment, the fourth heating element is a heating lamp box 7 arranged above the conveying surface of the conveying mechanism 15. Of course, the fourth heating element can also be a hot pressing component or a hot air component. The fourth heating element is used to heat the film strips 102 and / or the battery cells 101 after the battery cells 101 and the film strips 102 are stacked on the conveying surface of the conveying mechanism 15, so that the film strips 102 release their stickiness and adhere to the battery cells 101. Placing the fourth heating element above the conveying surface of the conveying mechanism 15 facilitates the installation and maintenance of the fourth heating element.

[0112] Optionally, the conveying surface of the conveying mechanism 15 is provided with second adsorption holes for adsorbing the film strips 102 and the battery cells 101 .

[0113] In the case where the first end of the battery cell 101 is stacked on the upper side of the film strip 102, the battery cell 101 can be adsorbed through the second adsorption hole, so that the first end of the battery cell 101 is pressed tightly against the film strip 102, ultimately ensuring that the film strip 102 is firmly bonded to the first end of the battery cell 101 after releasing its viscosity; at the same time, the second adsorption hole can also ensure the relative position of the battery cell and the film strip during transportation to prevent deviation.

[0114] Of course, in the case where the surface of the film strip 102 is non-sticky at room temperature, the film strip 102 may not be heated. The battery cell loading mechanism 11 and the film strip loading mechanism 12 stack the battery cells 101 and the film strip 102 onto the conveying surface of the conveying mechanism 15. After the battery cell 100 is formed, the conveying mechanism 15 directly conveys the battery cell 100 to the battery cell laying mechanism 2.

[0115] Since the battery cells 101 and film strips 102 of the battery cell 100 are not pre-bonded, the battery cell laying mechanism 2 must simultaneously absorb the battery cells 101 and film strips 102 of the battery cell 100 in order to smoothly lay the battery cell 100 onto the serial conveyor line 4 .

[0116] like Figure 3As shown, in order to be able to simultaneously absorb the battery cell 101 and the film strip 102 of the battery cell 100, optionally, the battery cell laying mechanism 2 includes a driving part 21, a battery cell suction part 22 and a film strip suction part 23, wherein the driving part 21 is configured to drive the battery cell suction part 21 and the film strip suction part 22 to move synchronously, so as to drive the battery cell suction part 21 and the film strip suction part 22 to respectively absorb the battery cell 101 and the film strip 102 of the battery cell 100, and lay the battery cell 100 onto the serial conveyor line 4.

[0117] The cell suction portion 22 may be, for example, a first suction cup group, and the film strip suction portion 23 may be, for example, a second suction cup group disposed to the side of the first suction cup group. Before sucking the battery cell 100, the driving portion 21 drives the first suction cup group and the second suction cup group to move synchronously, so that the first suction cup group and the second suction cup group move to directly above the cell 101 and the film strip 102 of the battery cell 100, respectively. Subsequently, the driving portion 21 drives the first suction cup group and the second suction cup group to descend, so that the first suction cup group and the second suction cup group respectively suck the cell 101 and the film strip 102 of the battery cell 100. Optionally, the second suction cup group includes a columnar suction cup disposed along the extension direction of the film strip 102. The columnar suction cup has a smaller suction end, which can smoothly suck the film strip 102.

[0118] Continue to refer Figures 1 to 3 As shown, the welding tape laying mechanism 3 in the embodiment of the present application can adopt various existing mechanisms that can implement the clamping and transportation of the welding tape. For example, the welding tape laying mechanism 3 includes a moving module, a mounting plate, a clamping drive module and a plurality of clamps, wherein the mounting plate is connected to the driving end of the moving module, the moving module is used to drive the mounting plate to move horizontally and lift, and a plurality of clamps are arranged side by side on the mounting plate, each clamp is used to clamp and release a welding tape in the welding tape group, and the clamping drive module is used to drive a plurality of clamps to synchronously perform clamping and releasing actions.

[0119] The serial connection mechanism 7 in the embodiment of the present application is at least one of a heating mechanism and a light curing mechanism.

[0120] In the conventional case of connecting cells in series only via solder ribbons, a heating mechanism is sufficient as the connecting mechanism 7. The heating mechanism heats the cells and solder ribbons to melt the solder on the ribbon surface, thereby creating a metallized connection between the ribbon and the corresponding cell, thus completing the welding of the cells into a string. In addition, if the cell and film strips are not pre-bonded, the heating mechanism can also simultaneously heat the film strips, so that the film strips release their viscosity after heating, allowing them to be bonded between adjacent cells.

[0121] In the case where a light-curing adhesive (such as UV adhesive) is applied to the surface of the battery cell, a light-curing mechanism is used to irradiate the battery cell and the soldering ribbon. After the light-curing adhesive is cured, the soldering ribbon can be bonded to the corresponding battery cell to complete the series connection of the battery cells. If the battery cell and the film strip in the battery unit have been pre-bonded, a heating mechanism can be optionally provided. On the basis of the light-curing adhesive bonding the soldering ribbon to the corresponding battery cell, the solder on the surface of the soldering ribbon can be heated and melted by the heating mechanism, thereby welding the soldering ribbon to the corresponding battery cell. This can further improve the connection strength between the soldering ribbon and the battery cell, and ultimately improve the quality of the battery string. If the battery cell and the film strip are not pre-bonded, a heating mechanism needs to be provided. The heating mechanism needs to at least heat the film strip so that the film strip releases its viscosity after heating so that it can be bonded between adjacent battery cells.

[0122] In the case where a heat-curing adhesive is applied to the surface of the cell, a heating mechanism is only required as the serial connection mechanism 7. The heating mechanism heats the cell and the solder ribbon, curing the heat-curing adhesive and bonding the ribbon to the corresponding cell. In addition, the heating mechanism can also heat the solder ribbon and the film strip, melting the solder on the surface of the solder ribbon and welding the ribbon to the corresponding cell, and releasing the adhesiveness of the film strip after heating, so that it can be bonded between adjacent cell cells.

[0123] Based on the same inventive concept, the present application also provides a battery stringing method, which can realize the automatic stringing of battery cells and welding ribbon groups, and during the stringing process, the membrane strips are all placed in the corresponding positions between the cells, thereby improving the stringing efficiency and stringing quality of the battery strings.

[0124] The battery stringing method in the embodiment of the present application includes the following steps:

[0125] S1. Stack the battery cells and the film strips into a battery unit, wherein in the battery unit, the first end of the battery cell is stacked on the upper side of the film strip, or the film strip is stacked on the upper side of the second end of the battery cell, and the first end of the battery cell and the second end of the battery cell are two opposite ends of the battery cell.

[0126] Figure 4 A first type of battery cell 100 formed by stacking according to an embodiment of the present application is shown, wherein the first end of the battery cell 101 is stacked on the upper side of the film strip 102 .

[0127] Figure 5 A second type of battery cell 100 formed by stacking according to an embodiment of the present application is shown, wherein the film strip 102 is stacked on the upper side of the second end of the battery cell 101 .

[0128] S2. Lay the battery cells and the welding ribbon groups in strings according to a predetermined stringing rule.

[0129] S3. Heating or irradiating the battery cells and welding ribbon groups laid out in a string so that the welding ribbon groups are connected to the battery cells of the corresponding battery cells.

[0130] The battery stringing method provided in the embodiments of this application first stacks the battery cells and film strips to form battery units. The battery cells and ribbons are then laid out in a string according to a predetermined stringing rule, ensuring that the film strips are positioned appropriately between the cells during the stringing process. Compared to existing battery stringing methods, the battery stringing device of the embodiments of this application improves both stringing efficiency and quality.

[0131] In some optional embodiments, it is necessary to Figure 4 The first type of battery cells 100 shown are connected in series to form a battery string via a welding ribbon assembly 200. In this case, step S2 of laying out the battery cells 100 and the welding ribbon assembly 200 in a string according to a predetermined stringing rule specifically includes:

[0132] The cell of the first battery unit 100 is stacked on the rear portion of the first welding ribbon group, with the first end of the cell 101 of the first battery unit 100 facing forward, and the front portion of the second welding ribbon group is stacked on the cell of the first battery unit 100.

[0133] The battery cell 101 of the i-th battery cell 100 is stacked on the rear section of the i-th welding ribbon group, and the first end of the battery cell 101 of the i-th battery cell 100 faces forward, the membrane strip 102 of the i-th battery cell 100 is at least partially located on the upper side of the second end of the battery cell 101 of the i-1-th battery cell 100, and the front section of the i+1-th welding ribbon group is stacked on the battery cell 101 of the i-th battery cell 100, where i is any natural number greater than 1.

[0134] In order to enable those skilled in the art to more clearly understand the specific stringing process of battery cells and welding ribbon groups, the following will be combined with Figure 6 , the specific stringing process of the battery cell 100 and the welding ribbon group is described in more detail.

[0135] like Figure 6 As shown, the target battery string consists of 4 Figure 4 The battery cell 100 and the five welding ribbon groups 200 are shown from front to back (as shown in FIG. Figure 6 The specific stringing process is as follows:

[0136] After laying out the first welding ribbon group 200, the battery cell 101 of the first battery cell 100 is stacked on the rear portion of the first welding ribbon group 200, with the first end of the battery cell 101 of the first battery cell 100 facing forward. In this way, the membrane strip 102 of the first battery cell 100 can be clamped between the battery cell 101 of the first battery cell 100 and the first welding ribbon group 200.

[0137] The front portion of the second welding ribbon assembly 200 is stacked on the battery cell of the first battery unit 100 .

[0138] The battery cell 101 of the second battery cell 100 is stacked on the rear portion of the second welding ribbon group 200, with the first end of the battery cell 101 of the second battery cell 100 facing forward, and the membrane strip 102 of the second battery cell is at least partially located on the upper side of the second end of the battery cell of the first battery cell. In this way, the membrane strip 102 of the second battery cell 100 can be clamped between the battery cell 101 of the second battery cell 100 and the second welding ribbon group 200.

[0139] The front portion of the third welding ribbon assembly 200 is stacked on the battery cell of the second battery unit 100 .

[0140] The battery cell 101 of the third battery cell 100 is stacked on the rear portion of the third welding ribbon group 200, with the first end of the battery cell 101 of the third battery cell 100 facing forward, and the membrane strip 102 of the third battery cell is at least partially located on the upper side of the second end of the battery cell of the second battery cell. In this way, the membrane strip 102 of the third battery cell 100 can be clamped between the battery cell 101 of the third battery cell 100 and the third welding ribbon group 200.

[0141] The front portion of the fourth welding ribbon assembly 200 is stacked on the battery cell of the third battery unit 100 .

[0142] The battery cell 101 of the fourth battery cell 100 is stacked on the rear portion of the fourth welding ribbon group 200, with the first end of the battery cell 101 of the fourth battery cell 100 facing forward, and the membrane strip 102 of the fourth battery cell is at least partially located on the upper side of the second end of the battery cell of the third battery cell. In this way, the membrane strip 102 of the fourth battery cell 100 can be clamped between the battery cell 101 of the fourth battery cell 100 and the fourth welding ribbon group 200.

[0143] The front portion of the fifth welding ribbon group is stacked on the battery cell of the fourth battery unit 100 .

[0144] So far, the Figure 6 The battery strings in the illustrated embodiment are laid out in strings.

[0145] It can be seen that after the battery cells 100 and the welding ribbon groups 200 are laid out in a string according to the above stringing rule, the film strips 102 of each battery cell 100 are all located at the inter-cell position between two adjacent battery cells.

[0146] Optionally, in order to ensure that the membrane strip 102 of the i-th battery cell 100 is at least partially located on the upper side of the second end of the battery cell of the (i-1)-th battery cell, this can be achieved by the following two laying methods.

[0147] like Figure 6 As shown, the first laying method is to lay the battery cells of the i-th battery cell so that the first end of the battery cell 101 of the i-th battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the i-1-th battery cell 100. Specifically, the first end of the battery cell 101 of the second battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the first battery cell 100. The first end of the battery cell 101 of the third battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the second battery cell 100. The first end of the battery cell 101 of the fourth battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the third battery cell 100. The battery string obtained by this laying method is Figure 6 The illustrated shingled cell string has a negative inter-cell spacing, and each film strip 102 is clamped at the overlapping portion of two adjacent cell sheets 101 , thereby preventing the overlapping portion of the two adjacent cell sheets 101 from being damaged during the subsequent lamination process.

[0148] like Figure 7 As shown, the second laying method is that there is a gap between the first end of the battery cell 101 of the i-th battery cell 100 and the second end of the battery cell 101 of the i-1-th battery cell 100, and the membrane strip 102 of the i-th battery cell 100 extends forward from the battery cell 101 of the i-th battery cell 100 and overlaps the upper side of the second end of the battery cell 101 of the i-1-th battery cell 100.

[0149] The battery string obtained by this laying method is Figure 7 The battery string shown has gaps between adjacent battery cells 101 (ie, the cell spacing is positive).

[0150] In some other optional embodiments, it is necessary to Figure 5 The second type of battery cells 100 shown are connected in series to form a battery string via a welding ribbon assembly 200. In this case, step S2 of laying out the battery cells 100 and the welding ribbon assembly into a string according to a predetermined stringing rule specifically includes:

[0151] The battery cell of the first battery unit is stacked on the rear section of the first welding ribbon group with the first end of the battery cell facing forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit.

[0152] The battery cell of the i-th battery cell is stacked on the rear section of the i-th welding ribbon group, and the first end of the battery cell of the i-th battery cell faces forward, the membrane strip of the i-1-th battery cell is at least partially located on the lower side of the first end of the battery cell of the i-th battery cell, and the front section of the i+1-th welding ribbon group is stacked on the battery cell of the i-th battery cell, where i is any natural number greater than 1.

[0153] In order to enable those skilled in the art to more clearly understand the specific stringing process of battery cells and welding ribbon groups, the following will be combined with Figure 8 , the specific stringing process of the battery cell 100 and the welding ribbon group is described in more detail.

[0154] like Figure 8 As shown, the target battery string consists of 4 Figure 5 The battery cell 100 and the five welding ribbon groups 200 are shown from front to back (as shown in FIG. Figure 8 The specific stringing process is as follows:

[0155] After the first welding ribbon assembly 200 is laid, the battery cell 101 of the first battery unit 100 is stacked on the rear portion of the first welding ribbon assembly 200 with the first end of the battery cell 101 of the first battery unit 100 facing forward.

[0156] The front section of the second welding ribbon group 200 is overlapped on the battery cell of the first battery unit 100 , so that the film strip 102 of the first battery unit 100 is clamped between the battery cell 101 of the first battery unit 100 and the second welding ribbon group 200 .

[0157] The battery cell 101 of the second battery cell 100 is stacked on the rear portion of the second welding ribbon group 200, with the first end of the battery cell 101 of the second battery cell 100 facing forward, and the membrane strip 102 of the first battery cell 100 is at least partially located on the lower side of the first end of the battery cell 101 of the second battery cell.

[0158] The front section of the third welding ribbon group 200 is overlapped on the battery cell 101 of the second battery unit 100 , so that the film strip 102 of the second battery unit 100 is clamped between the battery cell 101 of the second battery unit 100 and the third welding ribbon group 200 .

[0159] The battery cell 101 of the third battery cell 100 is stacked on the rear portion of the third welding ribbon group 200, with the first end of the battery cell 101 of the third battery cell 100 facing forward, and the membrane strip 102 of the second battery cell 100 is at least partially located on the lower side of the first end of the battery cell 101 of the third battery cell 100.

[0160] The front section of the fourth welding ribbon group 200 is overlapped on the battery cell 101 of the third battery cell 100 , so that the film strip 102 of the third battery cell 100 is clamped between the battery cell 101 of the third battery cell 100 and the fourth welding ribbon group 200 .

[0161] The battery cell 101 of the fourth battery cell 100 is stacked on the rear portion of the fourth welding ribbon group 200, with the first end of the battery cell 101 of the fourth battery cell 100 facing forward, and the membrane strip 102 of the third battery cell 100 is at least partially located on the lower side of the first end of the battery cell 101 of the fourth battery cell 100.

[0162] The front section of the fifth welding ribbon group 200 is overlapped on the battery cell 101 of the fourth battery cell 100 , so that the film strip 102 of the fourth battery cell 100 is clamped between the battery cell 101 of the fourth battery cell 100 and the fifth welding ribbon group 200 .

[0163] So far, the Figure 8 The battery strings in the illustrated embodiment are laid out in strings.

[0164] It can be seen that after the battery cells 100 and the welding ribbon groups 200 are laid out in a string according to the above stringing rule, the film strips 102 of each battery cell 100 are all located at the inter-sheet position between two adjacent battery sheets 101 .

[0165] Optionally, in order to ensure that the membrane strip of the (i-1)th battery cell is at least partially located on the lower side of the first end of the battery cell of the (i)th battery cell, this can be achieved by the following two laying methods.

[0166] like Figure 8As shown, the first laying method is that when laying the i-th battery cell 100, the first end of the battery cell 101 of the i-th battery cell 10 is overlapped on the upper side of the second end of the battery cell 101 of the i-1-th battery cell 100. Specifically, the first end of the battery cell 101 of the second battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the first battery cell 100. The first end of the battery cell 101 of the third battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the second battery cell 100. The first end of the battery cell 101 of the fourth battery cell 100 is overlapped on the upper side of the second end of the battery cell 101 of the third battery cell 100. The battery string obtained by this laying method is Figure 8 The illustrated shingled cell string has a negative inter-cell spacing, and each film strip 102 is clamped at the overlapping portion of two adjacent cell sheets 101 to prevent the overlapping portion of the two adjacent cell sheets 101 from being damaged during the subsequent lamination process.

[0167] like Figure 9 As shown, the second laying method is that when laying the i-th battery cell 100, there is a gap between the first end of the battery cell 101 of the i-th battery cell 100 and the second end of the battery cell 101 of the i-1-th battery cell 100, and the film strip 102 of the i-1-th battery cell 100 extends backward from the battery cell 101 of the i-1-th battery cell 100 and extends to the lower side of the first end of the battery cell 101 of the i-th battery cell 100. The battery string obtained by this laying method is Figure 9 The battery string shown has gaps between adjacent battery cells 101 (ie, the cell spacing is positive).

[0168] Optionally, before executing step S1 of "stacking the battery cells and film strips into battery units", the battery stringing method in the embodiment of the present application further includes: heating the film strips and / or the battery cells to release the viscosity of the film strips.

[0169] Before stacking the battery cells 101 and the membrane strips 102 into a battery unit, the membrane strips 102 are heated to release their stickiness, so that when the battery cells 101 and the membrane strips 102 are stacked into a battery unit 100, the membrane strips 102 can be adhered to the battery cells 101, thereby preventing the battery cells 101 and the membrane strips 102 from shifting during the subsequent laying and transportation process.

[0170] In one embodiment, before stacking the battery cells 101 and the film strips 102 into the battery unit 100, the heating method may be to heat only the battery cells 101 so that the battery cells 101 are heated and the temperature of the battery cells 101 is increased. In this way, when the battery cells 101 and the film strips 102 are stacked into the battery unit 100, the film strips 102 are heated by the battery cells 101, releasing their adhesiveness and thereby adhering to the battery cells 101. In another embodiment, it is also possible to heat only the film strips 102 so that the film strips 102 release their adhesiveness in advance after being heated. In this way, when the battery cells 101 and the film strips 102 are stacked into the battery unit 100, the film strips 102 can be quickly adhered to the battery cells 101. Of course, it is also possible to heat both the battery cells 101 and the film strips 102. In this way, when the battery cells 101 and the film strips 102 are stacked into the battery unit 100, the film strips 101 can be more quickly adhered to the battery cells 101.

[0171] Optionally, after executing step S1 of "stacking the battery cells and membrane strips into battery cells", the battery stringing method in the embodiment of the present application also includes: heating the membrane strips and / or battery cells in the battery cells so that the membrane strips in the battery cells release their viscosity and adhere to the battery cells in the battery cells.

[0172] After the battery cells 101 and the film strips 102 are stacked into a battery unit 100, the film strips 102 and / or the battery cells 101 are heated to release the stickiness of the film strips 102 so that they adhere to the battery cells 101, thereby preventing the battery cells 101 and the film strips 102 from shifting during subsequent laying and transportation.

[0173] In one embodiment, after the battery cells 101 and the film strips 102 are stacked to form the battery unit 100, only the battery cells 101 may be heated to increase the temperature of the battery cells 101. In this way, when the battery cells 101 and the film strips 102 are stacked to form the battery unit 100, the film strips 102 release their adhesiveness after being heated by the battery cells 101, thereby adhering to the battery cells 101. For example, Figure 5 In the second type of battery cell 100 shown, i.e., the film strip 102 is stacked on the upper side of the second end of the battery cell 101, the battery cell 101 of the battery cell 100 is heated by the supporting surface of the battery cell 100. In another embodiment, it is also possible to choose to heat only the film strip 102, so that the film strip 102 of the battery cell 100 releases its adhesiveness after being heated and adheres to the battery cell 101 of the battery cell 100. Of course, it is also possible to choose to heat both the battery cell 101 and the film strip 102 of the battery cell 100, for example, locally heating the overlapping position of the battery cell 101 and the film strip 102, or heating the battery cell 100 as a whole, so that the film strip 102 can be more quickly adhered to the battery cell 101.

[0174] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and that 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, not by the above description in the embodiments. Furthermore, the embodiments mentioned in the present application are not limited to being implemented individually, and some embodiments can also be implemented in combination.

Claims

1. A battery string device, characterized in that: The battery stringing device includes a battery cell supply mechanism, a battery cell laying mechanism, a welding ribbon laying mechanism, a stringing conveyor line and a stringing mechanism, wherein: The battery cell supply mechanism is configured to supply battery cells, wherein the battery cells include battery cells and film strips, wherein the first end of the battery cell is stacked on the upper side of the film strip, or the film strip is stacked on the upper side of the second end of the battery cell, and the second end of the battery cell and the first end of the battery cell are two opposite ends of the battery cell; The battery cell laying mechanism is configured to pick up the battery cells from the battery cell supply mechanism, and is configured to cooperate with the welding ribbon laying mechanism to lay the battery cells and welding ribbon groups on the stringing conveyor line according to a predetermined stringing rule; The stringing conveyor line is configured to convey the laid-out battery cells and the welding ribbon group to the stringing station; The serial connection mechanism is located at the serial connection station, and is configured to connect the welding ribbon group to the corresponding battery cell.

2. The battery string device according to claim 1, wherein: The battery cell supply mechanism includes a battery cell loading mechanism, a film strip loading mechanism, a pre-bonding mechanism, a transfer mechanism and a conveying mechanism; The battery cell loading mechanism and the film strip loading mechanism are configured to stack the battery cells and the film strips onto the carrying surface of the pre-bonding mechanism to form the battery unit, wherein the battery cells in the battery unit are bonded to the film strips; The transfer mechanism is configured to transfer the battery cells to the conveying mechanism, and the conveying mechanism is configured to convey the battery cells toward the battery cell laying mechanism; The battery cell laying mechanism is configured to pick up the battery cells from the conveying mechanism.

3. The battery string device according to claim 2, wherein: The first surface of the film strip is adhesive. When the battery cell and the film strip are stacked on the supporting surface of the pre-bonding mechanism, the first surface of the film strip is bonded to the battery cell.

4. The battery string device according to claim 2, wherein: The surface of the film strip is non-sticky at room temperature; The film strip feeding mechanism is provided with a first heating element, which is configured to heat the film strip so that the film strip releases its stickiness and adheres to the battery cell; or, The battery cell feeding mechanism is provided with a second heating element, which is configured to heat the battery cell, and heat the film strip through the battery cell so that the film strip releases its stickiness and then adheres to the battery cell; or, The pre-bonding mechanism is provided with a third heating element, which is configured to heat the film strip and / or the battery cell, so that the film strip releases its stickiness and then bonds to the battery cell.

5. The battery string device according to claim 4, characterized in that: The third heating element is provided inside the bearing surface of the pre-bonding mechanism, and the bearing surface of the pre-bonding mechanism is used to heat the film strip and / or the battery cell; or, The third heating element is arranged above the carrying surface of the pre-bonding mechanism, and is configured to move above the battery cell and heat the film strip and / or the battery cell after the battery cell and the film strip are stacked on the carrying surface of the pre-bonding mechanism.

6. The battery string device according to claim 2, wherein: A first adsorption hole for adsorbing the film strip and the battery cell is provided on the bearing surface of the pre-bonding mechanism.

7. The battery string device according to claim 1, wherein: The battery cell supply mechanism includes a battery cell loading mechanism, a film strip loading mechanism and a conveying mechanism; The battery cell loading mechanism and the film strip loading mechanism are configured to stack the battery cells and film strips onto the conveying surface of the conveying mechanism to form the battery units; The conveying mechanism is further configured to convey the battery cells to the battery cell laying mechanism; The battery cell laying mechanism picks up the battery cells from the conveying mechanism.

8. The battery string device according to claim 7, wherein: The first surface of the film strip is sticky. When the battery cell and the film strip are stacked on the conveying surface of the conveying mechanism, the first surface of the film strip is adhered to the battery cell.

9. The battery string device according to claim 7, wherein: The surface of the film strip is non-sticky at room temperature; The film strip feeding mechanism is provided with a first heating element, which is configured to heat the film strip so that the film strip releases its stickiness and adheres to the battery cell; or, The battery cell feeding mechanism is provided with a second heating element, which is configured to heat the battery cell, and heat the film strip through the battery cell so that the film strip releases its stickiness and then adheres to the battery cell; or, The conveying mechanism is provided with a fourth heating element, which is configured to heat the film strip and / or the battery cell, so that the film strip releases its viscosity and adheres to the battery cell.

10. The battery string device according to claim 9, wherein: The fourth heating element is a heating base plate provided below the conveying surface of the conveying mechanism, and the heating base plate is used to heat the film strips and / or the battery cells on the conveying surface; or, The fourth heating element is any one of a heating lamp box, a hot pressing assembly and a hot air assembly arranged above the conveying surface of the conveying mechanism, and the fourth heating element is configured to heat the film strip and / or the battery cell.

11. The battery string device according to claim 7, wherein: The conveying surface of the conveying mechanism is provided with second adsorption holes for adsorbing the film strips and the battery cells.

12. The battery string device according to claim 1, wherein: The battery cell laying mechanism includes a driving part, a battery cell suction part and a film strip suction part; The driving unit is configured to drive the cell suction unit and the film strip suction unit to move synchronously, so as to drive the cell suction unit and the film strip suction unit to respectively absorb the cell and the film strip of the battery unit, and lay the battery unit on the serial conveyor line; or, The battery cell laying mechanism includes a driving part and a battery cell suction part; The driving part is configured to drive the battery cell suction part to move, so as to drive the battery cell suction part to absorb the battery cell of the battery unit and place the battery unit on the string conveyor line.

13. The battery string device according to claim 1, wherein: The serial connection mechanism is at least one of a heating mechanism and a light curing mechanism.

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