Battery stringing device and stringing method

Abstract

The invention provides a battery stringing device and a stringing method. 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 more specifically to a cell stringing device and a cell stringing method. Background Art

[0002] In order to avoid the soldering tape 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 may be arranged between two adjacent battery cells during the production of the battery string to buffer the stress of the soldering tape on the battery cell.

[0003] The existing battery stringing process with film strips first connects the battery cells and the welding strips in series, and then inserts the film strips between the cells in the battery string. Since the battery cells and the welding strips are already connected in series, one of the two adjacent battery cells needs to be lifted to form a gap for film insertion before the film strip can be inserted. The existing battery stringing process with film strips is not only cumbersome to operate, but also easy to damage the battery 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 unit supply mechanism, a battery unit laying mechanism, a welding strip 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 the battery cells from the battery cell supply mechanism, and is configured to cooperate with the welding tape laying mechanism to lay the battery cells and welding tape groups on 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 slice.

[0010] The battery stringing device provided by the present application is a battery unit supply mechanism that supplies battery units formed by stacking battery cells and film strips. The battery unit laying mechanism and the welding strip laying mechanism cooperate with each other to lay the battery cells and welding strip groups on the stringing conveyor line according to a predetermined stringing rule, thereby achieving the laying of battery cells and welding strip groups in a string, and making the film strips all enter the corresponding inter-sheet positions.

[0011] Compared with the existing battery stringing method, the battery stringing device of the present application is used to implement the battery stringing operation, which saves 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 the film strips on the carrying surface of the pre-bonding mechanism to form a battery cell, wherein the battery cells in the battery cell are bonded to the film strips; the transfer mechanism is configured to transfer the battery cell to the conveying mechanism, and the conveying mechanism is configured to convey the battery cell toward the battery cell laying mechanism; the battery cell laying mechanism is configured to pick up the battery cell 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 the 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 in the battery cells have been pre-bonded with the film strips, the conveying mechanism can avoid displacement between the film strips and the battery cells when the battery cell laying mechanism conveys the battery cells to the battery cell laying mechanism, the battery cell laying mechanism lays the battery cells on the serial connection conveyor line, and the serial connection conveyor line conveys the laid battery cells and the welding strip 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 sticky, 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] Since the first side of the film strip is sticky, when the battery cell and the film strip are stacked on the supporting surface of the pre-bonding mechanism, the first side of the film strip can be bonded to the battery cell by itself. Therefore, there is no need to set up an additional heating element to heat the film strip to release the stickiness of the film strip, thereby reducing the cost of battery stringing.

[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, and 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, and is configured to heat the battery cell, and the film strip is heated by the battery cell so that the film strip releases its stickiness and adheres to the battery cell; or, a third heating element is provided on the pre-bonding mechanism, and 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.

[0017] Three heating methods for non-sticky film strips 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 arranged 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 arranged 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] The third heating element is arranged inside the bearing surface, which can save installation space and avoid interference between the third heating element and the battery cell feeding mechanism and the film strip feeding mechanism. The third heating element is arranged above the bearing surface, which facilitates the installation and maintenance of the third heating element.

[0020] In some embodiments, a first adsorption hole for adsorbing the film strip and the battery cell is disposed on the bearing surface of the pre-bonding mechanism.

[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 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 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 the film strips on a 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 feeding mechanism and the membrane strip feeding mechanism, the battery cells and membrane strips are automatically stacked on the conveying mechanism to form battery cells, and the conveying mechanism directly transports the battery cells to the battery cell laying mechanism, thereby improving the feeding efficiency of the battery cell supply mechanism.

[0024] In some embodiments, the first surface of the film strip is sticky, and 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.

[0025] Since the first side of the film strip is sticky, when the battery cell and the film strip are stacked on the conveying mechanism, the first side of the film strip adheres to the battery cell by itself. Since the film strip is adhered to the battery cell, the conveying mechanism can avoid displacement between the film strip and the battery cell when the battery cell is conveyed to the battery cell laying mechanism, when the battery cell laying mechanism lays the battery cell on the serial connection conveyor line, and when the serial connection conveyor line conveys the laid battery cell and the welding ribbon group to the serial connection station. In addition, since the film strip is adhered to the battery cell, the battery cell laying mechanism only needs to absorb the battery cell to lay the battery cell on the serial connection conveyor line, thereby reducing the structural complexity and cost of the battery cell laying 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, and 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, and is configured to heat the battery cell, and the film strip is heated by 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, and 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 non-sticky film strips 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 conveying mechanism can save installation space and avoid interference between the fourth heating element and the battery unit laying mechanism, the welding strip laying mechanism, etc. Placing the fourth heating element above the conveying surface of the conveying mechanism facilitates the 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 the battery sheets.

[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] In the case where the battery cell and the film strip are not pre-bonded, the battery cell laying mechanism is configured to include a driving part, a battery cell suction part and a film strip suction part, so that the battery cell laying mechanism can simultaneously absorb the battery cell and the film strip in the battery cell, thereby laying the battery cell on the serial conveyor line. In the case where the battery cell and the film strip are pre-bonded, the battery cell laying mechanism only needs to absorb the battery cell through the battery cell suction part to lay the battery cell on the serial conveyor line, thereby reducing the structural complexity and equipment cost of the battery cell laying 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 the cells in series only by welding ribbons, a heating mechanism is used to heat the cells and welding ribbons, so that the solder on the surface of the welding ribbons can be melted, so that the welding ribbons and the corresponding cells are metallized and connected, so as to complete the welding of the cells into a string. In addition, if the cells and the film strips are not pre-bonded, the heating mechanism can also heat the film strips simultaneously, so that the film strips release their viscosity after heating, so as to be bonded between adjacent cells.

[0036] In the case where a photocuring adhesive (such as UV adhesive) is applied to the surface of the battery cell, a photocuring mechanism is used to irradiate the battery cell and the soldering strip, so that the photocuring adhesive can be cured and the soldering strip 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 have been pre-bonded, a heating mechanism can be selectively set up, and the photocuring adhesive bonds the soldering strip to the corresponding battery cell. The solder on the surface of the soldering strip is heated and melted by the heating mechanism, thereby welding the soldering strip to the corresponding battery cell. This can further improve the connection strength between the soldering strip 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 set up. 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.

[0037] In the case where a heat-curing adhesive is applied on the surface of the battery cell, a heating mechanism is used to heat the battery cell and the soldering tape, so that the heat-curing adhesive can be cured and the soldering tape can be bonded to the corresponding battery cell. In addition, the heating mechanism can also heat the soldering tape and the film strip, so that the solder on the surface of the soldering tape is melted by heat and the soldering tape is welded to the corresponding battery cell, and the film strip is heated to release its viscosity so that it can be bonded between adjacent battery cells.

[0038] The present application also provides a battery stringing method, which comprises:

[0039] Stacking the battery cell and the film strip 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;

[0040] Lay the battery cells and the welding ribbon groups in strings according to a predetermined stringing rule;

[0041] The battery cells and welding ribbon groups laid out in a string are heated or illuminated so that the welding ribbon groups are connected to the battery sheets of the corresponding battery cells.

[0042] The battery stringing method provided by the present application first stacks the battery sheets and the film strips to form a battery unit. Then the battery units and the welding strip groups are laid into a string according to a predetermined stringing rule, so that the film strips enter the corresponding inter-sheet positions during the laying process of the battery string. Compared with the existing battery stringing method, the battery stringing device of the present application improves the stringing efficiency and stringing quality of the battery string.

[0043] In some embodiments, in the battery cell, the first end of the battery sheet is stacked on the upper side of the film strip; the stringing rules include:

[0044] The battery cell of the first battery unit is stacked on the rear section of the first welding ribbon group, and the first end of the battery cell of the first battery unit faces forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit;

[0045] 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-th battery cell is at least partially located on the upper side of the second end of the battery cell of the i-1-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.

[0046] A method for laying battery cells in a string is provided, which realizes laying battery cells and welding strips in a string and enables the film strips of the battery unit to be located at the inter-cell position between two adjacent battery cells.

[0047] In some embodiments, the first end of the battery cell of the i-th battery cell overlaps the upper side of the second end of the battery cell of the i-1-th battery cell; or, there is a gap between the first end of the battery cell of the i-th battery cell and the second end of the battery cell of the i-1-th battery cell, and the membrane strip of the i-th battery cell extends forward from the battery cell of the i-th battery cell and overlaps the upper side of the second end of the battery cell of the i-1-th battery cell.

[0048] By overlapping the first end of the cell of the i-th cell unit on the upper side of the second end of the cell of the i-1-th cell unit, the shingled cell string with a negative cell spacing is laid in a string, so that each film strip is clamped at the overlapping part of two adjacent cell sheets, preventing the overlapping part of two adjacent cell sheets from being damaged during the subsequent lamination process. For a cell string with a gap between adjacent cell sheets (i.e., the cell spacing is positive), the film strip of the rear cell unit extends forward and overlaps the upper side of the second end of the cell of the front cell unit, ensuring that the film strips can be bonded to the corresponding inter-cell positions.

[0049] In some embodiments, in the battery cell, the film strip is stacked on the upper side of the second end of the battery sheet;

[0050] The chaining rules include:

[0051] The battery cell of the first battery unit is stacked on the rear section of the first welding ribbon group, and the first end of the battery cell of the first battery unit faces forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit;

[0052] 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.

[0053] Another method of laying battery cells in a string is provided, which realizes laying battery cells and welding strips in a string and makes the film strips of the battery unit all located at the inter-cell position between two adjacent battery cells.

[0054] In some embodiments, the first end of the battery cell of the i-th battery cell overlaps the upper side of the second end of the battery cell of the i-1th battery cell; or, there is a gap between the first end of the battery cell of the i-th battery cell and the second end of the battery cell of the i-1th battery cell, and the membrane strip of the i-1th battery cell extends backward from the battery cell of the i-1th battery cell and extends to the lower side of the first end of the battery cell of the i-1th battery cell.

[0055] By overlapping the first end of the cell of the i-th cell unit on the upper side of the second end of the cell of the i-1-th cell unit, the shingled cell string with a negative cell spacing is laid in a string, so that each film strip is clamped at the overlapping part of two adjacent cell sheets, preventing the overlapping part of two adjacent cell sheets from being damaged during the subsequent lamination process. For a cell string with a gap between adjacent cell sheets (i.e., the cell spacing is positive), the film strip of the front cell unit extends backward and extends to the lower side of the first end of the cell of the rear cell unit, ensuring that the film strips can be bonded to the corresponding inter-cell positions.

[0056] In some embodiments, before stacking the battery sheets and the film strips into battery units, the battery stringing method further includes: heating the film strips and / or the battery sheets to release the stickiness of the film strips.

[0057] Before stacking the battery cells and the film strips into a battery unit, the film strips are heated to release their viscosity, so that when the battery cells and the film strips are stacked into a battery unit, the film strips can be bonded to the battery cells, which can prevent the battery cells and the film strips from shifting during the subsequent laying and transportation process. The heating method can be selected to heat only the battery cells so that the battery cells are heated and heated. In this way, when the battery cells and the film strips are stacked into a battery unit, the film strips are heated by the battery cells and release their viscosity, so that they are bonded to the battery cells; it can also be selected to heat only the film strips so that the film strips are heated and release their viscosity in advance, so that when the battery cells and the film strips are stacked into a battery unit, the film strips can be quickly bonded to the battery cells; of course, it is also possible to heat both the battery cells and the film strips, so that when the battery cells and the film strips are stacked into a battery unit, the film strips can be more quickly bonded to the battery cells.

[0058] In some embodiments, after stacking the battery cells and film strips into battery cells, the battery stringing method further includes: heating the film strips and / or battery cells in the battery cells so that the film strips in the battery cells release their viscosity and adhere to the battery cells in the battery cells.

[0059] After the battery cells and film strips are stacked into battery units, the film strips and / or battery cells can be heated to release the stickiness of the film strips, thereby bonding them to the battery cells, thereby preventing the battery cells and film strips from shifting during subsequent laying and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Figure 1 This is a schematic diagram of the structure of a battery string device in the first embodiment of the present application;

[0061] Figure 2 This is a schematic diagram of the structure of a battery string device in a second embodiment of the present application;

[0062] Figure 3 This is a schematic diagram of the structure of a battery string device in the third embodiment of the present application;

[0063] Figure 4 This is a schematic diagram of the structure of a battery unit in one embodiment of the present application;

[0064] Figure 5 This is a schematic structural diagram of a battery unit in another embodiment of the present application;

[0065] Figure 6 This is a schematic diagram of the structure of the first type of battery string laid out in this application;

[0066] Figure 7 A schematic diagram of the series connection of two adjacent battery cells in the second battery string formed by laying in this application;

[0067] Figure 8 This is a schematic diagram of the structure of the third type of battery string formed in this application;

[0068] Fig. 9 It is a schematic diagram of the series connection of two adjacent battery cells in the fourth type of battery string laid out in this application.

[0069] Figures 1 to 9 Included:

[0070] 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 part 111, battery cell loading part 112, film strip conveying part 121, film strip loading part 122;

[0071] Battery cell laying mechanism 2: driving part 21, battery cell suction part 22, film strip suction part 23;

[0072] Welding tape laying mechanism 3;

[0073] Connect conveyor line 4 in series;

[0074] Series connection mechanism 5;

[0075] Heating the bottom plate 6;

[0076] Heating light box 7;

[0077] Battery unit 100: battery cell 101, membrane strip 102;

[0078] Welding ribbon set 200. DETAILED DESCRIPTION

[0079] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0080] The existing battery stringing process with film strips first connects the battery cells and the welding strips in series, and then inserts the film strips between the cells in the battery string. Since the battery cells and the welding strips are already connected in series, one of the two adjacent battery cells needs to be lifted to form a gap for film insertion before the film strip can be inserted. The existing battery stringing process with film strips is not only cumbersome to operate, but also easy to damage the battery cells.

[0081] In view of this, the present application provides a battery stringing device, which can realize automatic series connection of battery cells and welding ribbon groups, and during the series connection process, it can make the membrane strips all 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 battery string device in the second embodiment of the present application is shown. Figure 3 A battery string device in the third embodiment of the present application is shown.

[0082] 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 tape laying mechanism 3, a stringing conveyor line 4 and a stringing mechanism 5.

[0083] 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 implementation, as Figure 5 As shown, the film strip 102 is stacked on the second end of the battery cell 101 (eg Figure 5 The 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.

[0084] The battery cell laying mechanism 2 is configured to pick up the battery cell 100 from the battery cell supply mechanism 1, and is configured to cooperate with the welding tape laying mechanism 3 to lay the battery cell 100 and the welding tape group 200 on the stringing conveyor line 4 according to a predetermined stringing rule.

[0085] The serial connection conveyor line 4 is configured to convey the laid-out battery cells 100 and the welding ribbon group 200 to the serial connection station.

[0086] The serial connection mechanism 5 is located at the serial connection station, and the serial connection mechanism 5 is configured to connect the welding ribbon group 200 to the corresponding battery cell 101 .

[0087] The battery stringing device provided in the embodiment of the present application is composed of a battery cell supply mechanism 1 that supplies a battery cell 100 formed by stacking battery cells 101 and film strips 102. The battery cell laying mechanism 2 cooperates with the welding strip laying mechanism 3 to lay the battery cell 100 and the welding strip group 200 on the stringing conveyor line 4 according to the predetermined stringing rules of the battery cell and the welding strip group, thereby realizing the laying of the battery cell 101 and the welding strip 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 battery cell laying process, thereby eliminating the subsequent film insertion operation and improving the stringing efficiency and stringing quality of the battery string.

[0088] 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:

[0089] 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 , and a first end of the battery cell 101 is stacked on the upper side of the film strip 102 .

[0090] 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 connection conveyor line 4 according to the following stringing rules to obtain Figure 6 The battery string shown.

[0091] First, the solder tape laying mechanism 3 lays the first solder tape group 200 onto the serial conveyor line 4 .

[0092] 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.

[0093] Next, the solder tape laying mechanism 3 overlaps the front section of the second solder tape group 200 on the battery cell 101 of the first battery unit 100 .

[0094] Subsequently, the battery unit laying mechanism 2 and the welding tape laying mechanism 3 continue to cooperate to complete the laying of the remaining welding tape groups 200 and the battery cell units 100 in sequence, as follows:

[0095] 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 section 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.

[0096] Next, the welding tape laying mechanism 3 overlaps the front section of the i+1th welding tape group 200 on the battery cell 101 of the i-th battery unit 100, wherein i is any natural number from 2 to N, and N is the number of battery cells included in the target battery string, for example Figure 6 In the embodiment shown, N is 4.

[0097] 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:

[0098] 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 , and the film strip 102 is stacked on the upper side of the second end of the battery cell 101 .

[0099] 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 connection conveyor line 4 according to the following stringing rules to obtain Figure 7 The battery string shown.

[0100] First, the solder tape laying mechanism 3 lays the first solder tape group 200 onto the serial conveyor line 4 .

[0101] 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.

[0102] Next, the solder tape laying mechanism 3 overlaps the front section of the second solder tape group 200 on the battery cell 101 of the first battery unit 100 .

[0103] Subsequently, the battery cell laying mechanism 2 and the welding tape laying mechanism 3 continue to cooperate to complete the laying of the remaining welding tape groups 200 and the battery cells 100 in sequence, as follows:

[0104] 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 section 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 film strip 102 of the i-1-th battery cell 100 is at least partially located at the lower side of the first end of the battery cell 101 of the i-th battery cell 100. Subsequently, the welding ribbon laying mechanism 3 stacks the front section 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 battery cells included in the target battery string, for example Figure 7 In the embodiment shown, N is 4.

[0105] 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 .

[0106] The cell loading mechanism 11 and the film strip loading mechanism 12 are configured to stack the cell 101 and the film strip 102 on the carrying 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, and the conveying mechanism 15 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.

[0107] The cell feeding mechanism 11 may be composed of, for example, a cell conveying portion 111 and a cell feeding portion 112, wherein the cell conveying portion 111 is used to convey the cell 101 one by one toward the cell feeding portion 112, and the cell feeding 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 feeding mechanism 12 may be composed of, for example, a film strip conveying portion 121 and a film strip feeding portion 122, wherein the film strip conveying portion 121 is used to convey the film strips 102 one by one toward the film strip feeding portion 122, and the film strip feeding 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.

[0108] It can be seen that, through the cooperation of the cell feeding mechanism 11, the film strip feeding mechanism 12 and the pre-bonding mechanism 13, the cell feeding mechanism 11 automatically stacks the cell 101 and the film strip 102 into the battery cell 100, and makes the film strip 102 bonded to the cell 101. Through the transfer mechanism 13, the position switching of the battery cell 100 from the pre-bonding mechanism 13 to the conveying mechanism 15 is realized. Since the cell 101 and the film strip 102 of the battery cell 100 are pre-bonded, the conveying mechanism 15 can avoid the displacement between the film strip 102 in the battery cell 100 and the cell 101 in the process of conveying the battery cell 100 to the battery cell laying mechanism 2, the battery cell laying mechanism 2 lays the battery cell 100 on the serial connection conveyor line 4, and the serial connection conveyor line 4 conveys the laid battery cell 100 and the welding ribbon group 200 to the serial connection station.

[0109] In addition, since the film strip 102 of the battery cell 100 has been pre-bonded on the battery cell 101, the battery cell laying mechanism 2 only needs to absorb the battery cell to lay the battery cell 100 on the serial conveyor line, thereby reducing the structural complexity and cost of the battery cell laying mechanism 100. For example, the battery cell laying mechanism 2 includes a driving unit 21 and a battery cell suction unit 22, wherein the driving unit 21 is configured to drive the battery cell suction unit 22 to move, so as to drive the battery cell suction unit 22 to absorb the battery cell 101 of the battery cell 100, and lay the battery cell 100 on the serial conveyor line 4.

[0110] The driving part 21 can adopt various existing driving mechanisms that can drive the cell suction part 22 to translate and elevate, for example, it includes a translation driving module and a lifting driving module, wherein the lifting driving module is connected to the movable part of the translation driving module, the cell suction part 22 is connected to the movable part of the lifting driving module, the translation driving module is used to drive the cell suction part 22 to translate, and the lifting driving module is used to drive the cell suction part 22 to elevate. For another example, the driving part 21 is a multi-axis robot arm, the cell suction part 22 is connected to the end of the multi-axis robot arm, and the multi-axis robot arm drives the cell suction part 22 to translate and elevate. The cell suction part 22 can, for example, adopt a suction cup assembly.

[0111] Similarly, since the film strip 102 of the battery cell 100 has 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.

[0112] In some application examples, the first surface of the film strip 102 is sticky. Since the first surface of the film strip 102 is sticky, when the battery cell 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 be self-bonded to the battery cell 101. Therefore, there is no need to set up an additional heating element to heat the film strip 102 to release the stickiness of the film strip 102, thereby reducing the cost of battery stringing.

[0113] 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 bond it to the battery cell 101, the following three implementation methods can be used:

[0114] The first implementation method: the film strip feeding mechanism 12 is provided with a first heating element, so that the film strip feeding mechanism 12 can heat the film strip 102 when stacking the film strip 102 on the pre-bonding mechanism 13, so that the film strip 102 releases its stickiness and then bonds 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.

[0115] Second implementation: A second heating element is provided on the cell feeding mechanism 11, so that the cell feeding mechanism 11 heats the cell 101 during the process of stacking the cell 101 on the pre-bonding mechanism 13. After the cell 101 and the film strip 102 are stacked on the pre-bonding mechanism 13, the cell 101 heats the film strip 102, so that the film strip 102 releases its stickiness and adheres to the cell 101. Optionally, when the cell feeding mechanism 11 is composed of a cell conveying part 111 and a cell feeding part 112, the second heating element is provided on the cell feeding part 112 and / or the cell conveying part 111.

[0116] 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 then bonds to the battery cell 101.

[0117] For the third implementation, in an optional embodiment, the third heating element is arranged inside the bearing surface of the pre-bonding mechanism 13. The third heating element may be, for example, a heating rod or a heating wire. The third heating element is arranged inside the bearing surface of the pre-bonding mechanism 13 to save installation space and avoid contact interference between the third heating element and the cell feeding mechanism 11 and the film strip feeding mechanism 12.

[0118] In another optional embodiment, the third heating element is arranged above the bearing 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 bearing surface of the pre-bonding mechanism 13, and heat the film strip 102 and / or the battery cell 101 of the battery cell 100. The third heating element is arranged above the bearing surface of the pre-bonding mechanism 13, which 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 may be, for example, a hot pressing plate connected to a movable module. The movable module first translates the hot pressing plate 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 .

[0119] Optionally, a first adsorption hole for adsorbing the film strip 102 and the battery cell 101 is provided on the bearing surface of the pre-bonding mechanism 13 .

[0120] 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 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.

[0121] Optionally, the carrying surface of the pre-bonding mechanism 13 can accommodate multiple battery cells 100. The transfer mechanism 14 can absorb at least two battery cells 100 from the pre-bonding mechanism 13 each time, and transfer at least two battery cells 100 to the conveying mechanism 15, thereby improving the loading efficiency of the battery cells 100.

[0122] 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 .

[0123] 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 conveying mechanism 15 to form a battery cell 100. The conveying 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 conveying mechanism 15.

[0124] 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.

[0125] The cell feeding mechanism 11 and the film strip feeding mechanism 12 can both be used in the same manner as Figure 1 The same mechanisms in the embodiments are not described again here for the sake of brevity.

[0126] In some application examples, the first side of the film strip 102 is sticky. Since the first side of the film strip 102 is sticky, when the battery cell 101 and the film strip 102 are stacked on the conveying mechanism 15 to form the battery unit 100, the first side of the film strip 102 can be self-adhered to the battery cell 101. Therefore, there is no need to set up an additional heating element to heat the film strip 102 to release the stickiness of the film strip 102, thereby reducing the cost of battery stringing.

[0127] Since the film strip 102 is bonded to the battery cell 101. In this way, when the conveying mechanism 15 conveys the battery cell 100 to the battery cell laying mechanism 2, when the battery cell laying mechanism 2 lays the battery cell 100 on the serial conveyor line 4, and when the serial conveyor line 4 conveys the laid battery cell 100 and the welding tape group 200 to the serial connection station, displacement between the film strip 102 of the battery cell 100 and the battery cell 101 can be avoided. In addition, since the film strip 102 is bonded to the battery cell 101, the battery cell laying mechanism 2 only needs to absorb the battery cell 101 to lay the battery cell 100 on the serial conveyor line 4, thereby reducing the structural complexity and cost of the battery cell laying mechanism 2.

[0128] 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 bond it to the battery cell 101, the following three implementation methods can be used:

[0129] The first implementation method: the film strip feeding mechanism 12 is provided with a first heating element, so that the film strip feeding mechanism 12 can heat the film strip 102 when stacking the film strip 102 on the conveying mechanism 15, so that the film strip 102 releases its stickiness and adheres 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 second heating element is provided on the film strip feeding portion 122 and / or the film strip conveying portion 121.

[0130] Second implementation: A second heating element is provided on the cell feeding mechanism 11, so that the cell feeding mechanism 11 can heat the cell 101 when stacking the cell 101 on the conveying mechanism 15. After the cell 101 and the film strip 102 are stacked on the conveying mechanism 15, the cell 101 heats the film strip 102, so that the film strip 102 releases its stickiness and adheres to the cell 101. Optionally, when the cell feeding mechanism 11 is composed of a cell conveying part 111 and a cell feeding part 112, the second heating element is provided on the cell feeding part 112 and / or the cell conveying part 111.

[0131] 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.

[0132] For the third implementation, in an optional embodiment, the fourth heating element is a heating base plate 6 disposed below the conveying surface of the conveying mechanism 15, and the heating base plate 6 is used to heat the film strip 102 and / or the battery cell 101 on the conveying surface. The fourth heating element is disposed below the conveying surface of the conveying mechanism 15, which can save installation space and avoid contact interference between the fourth heating element and the battery unit laying mechanism 2, the welding strip laying mechanism 3, etc.

[0133] 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 strip 102 and / or the battery cell 101 after the battery cell 101 and the film strip 102 are stacked on the conveying surface of the conveying mechanism 15, so that the film strip 102 releases the stickiness and adheres to the battery cell 101. The fourth heating element is arranged above the conveying surface of the conveying mechanism 15, which facilitates the installation and maintenance of the fourth heating element.

[0134] 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 .

[0135] 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 against the film strip 102, and finally ensures 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.

[0136] 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.

[0137] Since the battery cells 101 and the film strips 102 of the battery cells 100 are not pre-bonded, the battery cell laying mechanism 2 must simultaneously absorb the battery cells 101 and the film strips 102 of the battery cells 100 in order to smoothly lay the battery cells 100 on the serial conveyor line 4 .

[0138] like Figure 3 As shown, in order 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 unit 21, a battery cell suction unit 22 and a film strip suction unit 23, wherein the driving unit 21 is configured to drive the battery cell suction unit 21 and the film strip suction unit 22 to move synchronously, so as to drive the battery cell suction unit 21 and the film strip suction unit 22 to respectively absorb the battery cell 101 and the film strip 102 of the battery cell 100, and lay the battery cell 100 on the serial conveyor line 4.

[0139] The cell suction part 22 may be, for example, a first suction cup group, and the film strip suction part 23 may be, for example, a second suction cup group arranged at the side of the first suction cup group. Before sucking the battery cell 100, the driving part 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 the top of the cell 101 and the film strip 102 of the battery cell 100, respectively. Subsequently, the driving part 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 arranged along the extension direction of the film strip 102, and the suction end of the columnar suction cup is small, so that the film strip 102 can be sucked smoothly.

[0140] Continue to refer Figures 1 to 3 As shown, the solder 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 solder tape. For example, the solder 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 translate 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 solder tape in the solder tape group, and the clamping drive module is used to drive a plurality of clamps to synchronously perform clamping and releasing actions.

[0141] 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.

[0142] In the conventional case of connecting the battery cells in series only through the welding strip, it is only necessary to use a heating mechanism as the series connection mechanism 7. The heating mechanism can melt the solder on the surface of the welding strip by heating the battery cells and the welding strip, so that the welding strip and the corresponding battery cells are metallized and connected to complete the welding of the battery cells into a series. In addition, if the battery cells and the film strip are not pre-bonded, the heating mechanism can also heat the film strip simultaneously, so that the film strip releases its viscosity after heating, so as to be bonded between adjacent battery cells.

[0143] In the case where a photocuring adhesive (such as UV adhesive) is applied to the surface of the battery cell, a photocuring mechanism is used to irradiate the battery cell and the soldering strip, so that the soldering strip can be bonded to the corresponding battery cell after the photocuring adhesive is cured, so as 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 selectively set up. On the basis of the photocuring adhesive bonding the soldering strip to the corresponding battery cell, the solder on the surface of the soldering strip can be heated and melted by the heating mechanism, so as to weld the soldering strip to the corresponding battery cell, which can further improve the connection strength between the soldering strip 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 set up. The heating mechanism needs to at least heat the film strip so that the film strip releases its viscosity after heating so as to be bonded between adjacent battery cells.

[0144] In the case where a heat-curing adhesive is applied on the surface of the battery cell, it is only necessary to use a heating mechanism as the series connection mechanism 7. The heating mechanism heats the battery cell and the soldering tape, so that the heat-curing adhesive is cured and the soldering tape is bonded to the corresponding battery cell. In addition, the heating mechanism can also heat the soldering tape and the film strip, so that the solder on the surface of the soldering tape is melted by heat and the soldering tape is welded to the corresponding battery cell, and the film strip is heated to release its viscosity so as to be bonded between adjacent battery cells.

[0145] Based on the same inventive concept, the present application also provides a battery stringing method, which can realize the automatic series connection of battery cells and welding ribbon groups, and in the series connection 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.

[0146] The battery stringing method in the embodiment of the present application comprises the following steps:

[0147] S1. Stacking battery cells and 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.

[0148] Figure 4A first type of battery cell 100 formed by stacking in an embodiment of the present application is shown, wherein a first end of a battery cell 101 is stacked on an upper side of a film strip 102 .

[0149] 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 .

[0150] S2. Lay the battery cells and the welding ribbon groups in strings according to a predetermined stringing rule.

[0151] S3, heating or irradiating the battery cells and welding ribbon groups laid in a string, so that the welding ribbon groups are connected to the battery sheets of the corresponding battery cells.

[0152] The battery stringing method provided in the embodiment of the present application first stacks the battery sheets and the film strips to form a battery unit. Then the battery units and the welding ribbon groups are laid in a string according to a predetermined stringing rule, so that the film strips enter the corresponding inter-sheet positions during the laying process of the battery string. Compared with the existing battery stringing method, the battery stringing device in the embodiment of the present application improves the stringing efficiency and stringing quality of the battery string.

[0153] 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 group 200. In this case, the step S2 of laying out the battery cells 100 and the welding ribbon group 200 in a string according to a predetermined stringing rule specifically includes:

[0154] The battery cell of the first battery unit 100 is stacked on the rear section of the first welding ribbon group, and the first end of the battery cell 101 of the first battery unit 100 faces forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit 100.

[0155] 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.

[0156] 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.

[0157] 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:

[0158] After laying out the first welding ribbon group 200 , the battery cell 101 of the first battery cell 100 is then stacked 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, so that the film 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 .

[0159] The front section of the second welding ribbon group 200 is overlapped on the battery cell of the first battery unit 100 .

[0160] The battery cell 101 of the second battery cell 100 is stacked on the rear section 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.

[0161] The front section of the third welding ribbon group 200 is overlapped on the battery cell of the second battery unit 100 .

[0162] The battery cell 101 of the third battery cell 100 is stacked on the rear section 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.

[0163] The front section of the fourth welding ribbon group 200 is stacked on the battery cell of the third battery unit 100 .

[0164] The battery cell 101 of the fourth battery cell 100 is stacked on the rear section 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.

[0165] The front section of the fifth welding ribbon group is stacked on the battery cell of the fourth battery unit 100 .

[0166] So far, the Figure 6 The battery strings in the illustrated embodiment are laid out in strings.

[0167] 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.

[0168] Optionally, in order to make the membrane strip 102 of the i-th battery cell 100 at least partially located on the upper side of the second end of the battery sheet of the (i-1)-th battery cell, it can be achieved according to the following two laying methods.

[0169] like Figure 6 As shown, the first laying method is that when laying the battery cell of the i-th battery cell, 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 battery string has a negative inter-cell spacing, and each film strip 102 is clamped at the overlapping portion of two adjacent battery cells 101 , thereby preventing the overlapping portion of two adjacent battery cells 101 from being damaged during the subsequent lamination process.

[0170] 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.

[0171] 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).

[0172] In some other optional embodiments, it is necessary to Figure 5The second type of battery cells 100 shown are connected in series to form a battery string via a welding ribbon group 200. In this case, the battery cells 100 and the welding ribbon group are laid out in a string according to a predetermined stringing rule in step S2, specifically including:

[0173] 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 of the first battery unit facing forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit.

[0174] 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.

[0175] 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.

[0176] 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:

[0177] After the first welding ribbon group 200 is laid, the battery cell 101 of the first battery unit 100 is then stacked on the rear section of the first welding ribbon group 200 with the first end of the battery cell 101 of the first battery unit 100 facing forward.

[0178] 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 can be clamped between the battery cell 101 of the first battery unit 100 and the second welding ribbon group 200 .

[0179] The battery cell 101 of the second battery cell 100 is stacked on the rear section of the second welding strip 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 at the lower side of the first end of the battery cell 101 of the second battery cell.

[0180] 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 can be clamped between the battery cell 101 of the second battery unit 100 and the third welding ribbon group 200 .

[0181] The battery cell 101 of the third battery cell 100 is stacked on the rear section of the third welding strip 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 at the lower side of the first end of the battery cell 101 of the third battery cell 100.

[0182] 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 .

[0183] The battery cell 101 of the fourth battery cell 100 is stacked on the rear section of the fourth welding strip 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 at the lower side of the first end of the battery cell 101 of the fourth battery cell 100.

[0184] The front section of the fifth welding ribbon group 200 is overlapped on the battery cell 101 of the fourth battery unit 100 , so that the film strip 102 of the fourth battery unit 100 can be clamped between the battery cell 101 of the fourth battery unit 100 and the fifth welding ribbon group 200 .

[0185] So far, the Figure 8 The battery strings in the illustrated embodiment are laid out in strings.

[0186] 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-mentioned stringing rule, the film strips 102 of each battery cell 100 are all located at the inter-cell position between two adjacent battery cells 101 .

[0187] Optionally, in order to make the membrane strip of the (i-1)th battery cell at least partially located on the lower side of the first end of the battery sheet of the (i)th battery cell, it can be achieved according to the following two laying methods.

[0188] 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 battery string has a negative inter-cell spacing, and each film strip 102 is clamped at the overlapping portion of two adjacent battery cells 101 to prevent the overlapping portion of two adjacent battery cells 101 from being damaged during the subsequent lamination process.

[0189] like Fig. 9 As shown in FIG. 1 , 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-1th battery cell 100, and the film strip 102 of the i-1th battery cell 100 extends backward from the battery cell 101 of the i-1th battery cell 100 and extends to the lower side of the first end of the battery cell 101 of the i-1th battery cell 100. The battery string obtained by this laying method is Fig. 9 The battery string shown has gaps between adjacent battery cells 101 (ie, the cell spacing is positive).

[0190] Optionally, before executing step S1 of "stacking the battery cells and the 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.

[0191] 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.

[0192] In one embodiment, before stacking the battery cell 101 and the film strip 102 into the battery unit 100, the heating method can be selected to heat only the battery cell 101, so that the battery cell 101 is heated and heated. In this way, when the battery cell 101 and the film strip 102 are stacked into the battery unit 100, the film strip 102 is heated by the battery cell 101 and releases its viscosity, thereby bonding to the battery cell 101. In another embodiment, it is also possible to heat only the film strip 102, so that the film strip 102 releases its viscosity in advance after being heated. In this way, when the battery cell 101 and the film strip 102 are stacked into the battery unit 100, the film strip 102 can be quickly bonded to the battery cell 101. Of course, it is also possible to heat both the battery cell 101 and the film strip 102, so that when the battery cell 101 and the film strip 102 are stacked into the battery unit 100, the film strip 101 can be bonded to the battery cell 101 more quickly.

[0193] 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.

[0194] After the battery cells 101 and the film strips 102 are stacked into the battery unit 100, the film strips 102 and / or the battery cells 101 can be heated to release the viscosity 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 the subsequent laying and transportation process.

[0195] In one embodiment, after the battery cell 101 and the film strip 102 are stacked into the battery unit 100, only the battery cell 101 may be heated so that the battery cell 101 is heated and heated. Thus, when the battery cell 101 and the film strip 102 are stacked into the battery unit 100, the film strip 102 is heated by the battery cell 101 and releases its viscosity, thereby being bonded to the battery cell 101. 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 viscosity 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 heat the overlapping position of the battery cell 101 and the film strip 102, or heat the battery cell 100 as a whole, so that the film strip 102 can be more quickly adhered to the battery cell 101.

[0196] The above description of the present application is sufficiently detailed and has certain particularities. Those skilled in the art should understand that the description in the embodiments is merely exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the scope of protection of the present application. The scope of protection claimed in the present application is defined by the claims, not by the above description in the embodiments. Moreover, 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 unit supply mechanism, a battery unit laying mechanism, a welding strip 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 cell from the battery cell supply mechanism, and is configured to cooperate with the welding tape laying mechanism to lay the battery cell and the welding tape group on the stringing conveyor line according to a predetermined stringing rule; The serial connection conveyor line is configured to convey the laid-out battery cells and the welding ribbon group to the serial connection station; The serial connection mechanism is located at the serial connection station, and the serial connection mechanism is configured to connect the welding ribbon group to the corresponding battery cell.

2. The battery string device according to claim 1, characterized in that: The battery unit supply mechanism includes a battery sheet feeding mechanism, a film strip feeding mechanism, a pre-bonding mechanism, a transfer mechanism and a conveying mechanism; The battery cell feeding mechanism and the film strip feeding mechanism are configured to stack the battery cells and the film strips on 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 cell to the conveying mechanism, and the conveying mechanism is configured to convey the battery cell 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, characterized in that: The first surface of the film strip is sticky. When the battery cell and the film strip are stacked on the carrying 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, characterized in that: 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 then 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 viscosity 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 arranged 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 unit 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, characterized in that: The bearing surface of the pre-bonding mechanism is provided with a first adsorption hole for adsorbing the film strip and the battery cell.

7. The battery stringing device according to claim 1, characterized in that: The battery cell supply mechanism includes a battery cell feeding mechanism, a film strip feeding 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 conveying surface of the conveying mechanism to form the battery unit; The conveying mechanism is also configured to convey the battery cell 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, characterized in that: 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, characterized in that: 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 then 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 viscosity 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 then adheres to the battery cell.

10. The battery string device according to claim 9, characterized in that: The fourth heating element is a heating bottom plate arranged below the conveying surface of the conveying mechanism, and the heating bottom plate is used to heat the film strip and / or the battery cell 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 strip and / or the battery cell.

11. The battery string device according to claim 7, characterized in that: The conveying surface of the conveying mechanism is provided with second adsorption holes for adsorbing the film strip and the battery sheet.

12. The battery string device according to claim 1, characterized in that: The battery unit 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 battery cell suction unit and the film strip suction unit to move synchronously, so as to drive the battery cell suction unit and the film strip suction unit to respectively absorb the battery 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 serial conveying line.

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

14. A battery stringing method, characterized in that: The battery stringing method comprises: Stacking the battery sheet and the film strip into a battery unit, wherein in the battery unit, the first end of the battery sheet 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 sheet, and the first end of the battery sheet and the second end of the battery sheet are two opposite ends of the battery sheet; Lay the battery cells and the welding ribbon groups in strings according to a predetermined stringing rule; The battery cells and welding ribbon groups laid out in a string are heated or illuminated so that the welding ribbon groups are connected to the battery sheets of the corresponding battery cells.

15. The battery stringing method according to claim 14, characterized in that: In the battery unit, the first end of the battery sheet is stacked on the upper side of the film strip; The stringing rules include: The battery cell of the first battery unit is stacked on the rear section of the first welding ribbon group, and the first end of the battery cell of the first battery unit faces forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit; 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-th battery cell is at least partially located on the upper side of the second end of the battery cell of the i-1-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.

16. The battery stringing method according to claim 15, characterized in that: The first end of the battery cell of the i-th battery unit is overlapped on the upper side of the second end of the battery cell of the (i-1)-th battery unit; or, There is a gap between the first end of the battery cell of the i-th battery cell and the second end of the battery cell of the i-1-th battery cell, and the membrane strip of the i-th battery cell extends forward from the battery cell of the i-th battery cell and overlaps the upper side of the second end of the battery cell of the i-1-th battery cell.

17. The battery stringing method according to claim 14, characterized in that: In the battery unit, the film strip is stacked on the upper side of the second end of the battery sheet; The stringing rules include: The battery cell of the first battery unit is stacked on the rear section of the first welding ribbon group, and the first end of the battery cell of the first battery unit faces forward, and the front section of the second welding ribbon group is stacked on the battery cell of the first battery unit; 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.

18. The battery stringing method according to claim 17, characterized in that: The first end of the battery cell of the i-th battery unit is overlapped on the upper side of the second end of the battery cell of the (i-1)-th battery unit; or, There is a gap between the first end of the battery cell of the i-th battery cell and the second end of the battery cell of the i-1-th battery cell, and the membrane strip of the i-1-th battery cell extends backward from the battery cell of the i-1-th battery cell and extends to the lower side of the first end of the battery cell of the i-th battery cell.

19. The battery stringing method according to claim 14, characterized in that: Before stacking the battery sheets and the film strips into battery units, the battery stringing method further includes: The film strip and / or the battery sheet are heated to release the stickiness of the film strip.

20. The battery stringing method according to claim 14, characterized in that: After stacking the battery sheets and the film strips into battery units, the battery stringing method further includes: The film strips and / or battery cells in the battery cell are heated so that the film strips in the battery cell release their stickiness and then adhere to the battery cells in the battery cell.

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