Battery string tab replacement method and replacement device

Abstract

The application discloses a battery string replacement method and a replacement device. The battery string comprises a plurality of battery pieces and a welding strip group arranged on the plurality of battery pieces. The welding strip group connects the plurality of battery pieces. A battery piece needing to be replaced in the battery string is defined as a first battery piece. Battery pieces on both sides of the first battery piece along a preset direction are defined as second battery pieces. A battery piece used for replacement is defined as a replacement battery piece. The replacement method comprises the following steps: disconnecting welding strips between the first battery piece and two second battery pieces; moving the replacement battery piece to between the two second battery pieces; connecting a welding strip on one side of the replacement battery piece and a welding strip on one of the second battery pieces through a first connecting piece; and connecting a welding strip on the other side of the replacement battery piece and a welding strip on the other second battery piece through a second connecting piece. The first connecting piece and the second connecting piece are both conductive. Through the above arrangement, the replacement efficiency of the battery string can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic production, in particular to a cell string replacement piece repair method and a repair device. BACKGROUND

[0002] A photovoltaic cell string is a power generation unit formed by connecting multiple photovoltaic cell pieces in series, and is a core component of a photovoltaic system.

[0003] When a cell piece in a cell string has a problem and the cell string cannot work, the cell string needs to be repaired. Since the cell piece and the conductive connecting piece (for example, a solder strip) are usually fixed by welding, the existing cell string repair method is to remove the cell piece that needs to be repaired from the cell string after heat melting, and then weld a new replacement cell piece to the cell string to achieve the repair of the cell string.

[0004] In order to meet the stable connection requirement of the cell piece and the solder strip, the grid line of the cell piece needs to be connected to the solder strip. However, if the above repair method is used, the connection position of the replacement cell piece and the solder strip needs to be adjusted repeatedly, thereby reducing the repair efficiency of the cell string. SUMMARY

[0005] In order to solve the problems of the prior art, the purpose of the present application is to provide a cell string replacement piece repair method and a repair device with high repair efficiency.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0007] A cell string replacement piece repair method, the cell string includes a plurality of cell pieces and a solder strip group arranged on the plurality of cell pieces, the plurality of cell pieces are arranged along a preset direction, the solder strip group extends along the preset direction, the solder strip group connects the plurality of cell pieces, and the solder strip group includes a plurality of solder strips. Define the cell piece that needs to be repaired in the cell string as a first cell piece, define the cell pieces on both sides of the first cell piece along the preset direction as second cell pieces, and define the cell piece used for replacement as a replacement cell piece. The repair method comprises: disconnecting the solder strips between the first cell piece and the two second cell pieces; moving the replacement cell piece to between the two second cell pieces; connecting the solder strip on one side of the replacement cell piece to the solder strip on one of the second cell pieces through a first connecting piece, and connecting the solder strip on the other side of the replacement cell piece to the solder strip on the other second cell piece through a second connecting piece, wherein the first connecting piece and the second connecting piece are both conductive.

[0008] Further, the first connecting piece and the second connecting piece are each provided with one, the solder strips on one side of the replacement battery piece and the solder strips on one of the second battery pieces are connected with the first connecting piece, and the solder strips on the other side of the replacement battery piece and the solder strips on the other of the second battery pieces are connected with the second connecting piece; or, the first connecting piece and the second connecting piece are each provided with multiple, the multiple first connecting pieces are connected with each other, the multiple second connecting pieces are connected with each other, the solder strips on one side of the replacement battery piece and the solder strips on one of the second battery pieces are respectively connected with the multiple first connecting pieces, and the solder strips on the other side of the replacement battery piece and the solder strips on the other of the second battery pieces are respectively connected with the multiple second connecting pieces.

[0009] Further, the repair method comprises: connecting the first connecting piece with the solder strips on one side of the replacement battery piece; connecting the second connecting piece with the solder strips on the other side of the replacement battery piece; moving the replacement battery piece to between the two second battery pieces; connecting the first connecting piece with the solder strips on one of the second battery pieces and connecting the second connecting piece with the solder strips on the other of the second battery pieces. Or, the repair method comprises: connecting the first connecting piece with the solder strips on one of the second battery pieces; connecting the second connecting piece with the solder strips on the other of the second battery pieces; moving the replacement battery piece to between the two second battery pieces; connecting the first connecting piece with the solder strips on one side of the replacement battery piece and connecting the second connecting piece with the solder strips on the other side of the replacement battery piece. Or, the repair method comprises: connecting the first connecting piece with the solder strips on one of the second battery pieces; connecting the second connecting piece with the solder strips on one side of the replacement battery piece; moving the replacement battery piece to between the two second battery pieces; connecting the first connecting piece with the solder strips on the other side of the replacement battery piece and connecting the second connecting piece with the solder strips on the other of the second battery pieces. Or, the first connecting piece and the second connecting piece are each provided with two; the repair method comprises: connecting one of the first connecting pieces with the solder strips on one of the second battery pieces and connecting the other of the first connecting pieces with the solder strips on one side of the replacement battery piece; connecting one of the second connecting pieces with the solder strips on the other of the second battery pieces and connecting the other of the second connecting pieces with the solder strips on the other side of the replacement battery piece; moving the replacement battery piece to between the two second battery pieces; connecting the two first connecting pieces and connecting the two second connecting pieces.

[0010] Further, the repair method comprises: moving the replacement battery piece to between the two second battery pieces, the replacement battery piece being above the first battery piece; connecting the solder strips on one side of the replacement battery piece with the solder strips on one of the second battery pieces through the first connecting piece and connecting the solder strips on the other side of the replacement battery piece with the solder strips on the other of the second battery pieces through the second connecting piece; turning over the battery string, the replacement battery piece being below the first battery piece; disconnecting the solder strips between the first battery piece and the two second battery pieces.

[0011] Further, the welding band between the first battery piece and the two second battery pieces is defined as a pre-breaking section. The repair method comprises: connecting the first connecting piece with the pre-breaking section on one side of the first battery piece; connecting the second connecting piece with the pre-breaking section on the other side of the first battery piece; disconnecting the pre-breaking section from the first battery piece, the first connecting piece and the second connecting piece being connected with one second battery piece through one pre-breaking section respectively; moving the replacement battery piece between the two second battery pieces; connecting the first connecting piece with the welding band on one side of the replacement battery piece, and connecting the second connecting piece with the welding band on the other side of the replacement battery piece.

[0012] Further, the welding band between the first battery piece and the two second battery pieces is defined as a pre-breaking section, one end of the pre-breaking section connected with the first battery piece is defined as a first connecting end, and one end of the pre-breaking section connected with the second battery piece is defined as a second connecting end. The repair method further comprises: disconnecting the first connecting end from the first battery piece, so that the length of the pre-breaking section meets the preset length.

[0013] Further, the welding band on the replacement battery piece is defined as a replacement welding band. The repair method further comprises: placing a plurality of battery pieces to be processed, a plurality of first connecting pieces and a plurality of second connecting pieces on a carrier, one first connecting piece and one second connecting piece being placed between adjacent two battery pieces to be processed; winding the replacement welding band on the carrier, so that the replacement welding band is connected to the plurality of battery pieces to be processed, the plurality of first connecting pieces and the plurality of second connecting pieces; disconnecting the replacement welding band between the first connecting piece and the second connecting piece, to form a combination of the replacement battery piece, the first connecting piece and the second connecting piece. Alternatively, the repair method further comprises: winding the replacement welding band on a carrier; placing a plurality of battery pieces to be processed, a plurality of first connecting pieces and a plurality of second connecting pieces on the carrier, so that the plurality of battery pieces to be processed, the plurality of first connecting pieces and the plurality of second connecting pieces are connected to the replacement welding band; wherein one first connecting piece and one second connecting piece are placed between adjacent two battery pieces to be processed; disconnecting the replacement welding band between the first connecting piece and the second connecting piece, to form a combination of the replacement battery piece, the first connecting piece and the second connecting piece.

[0014] Further, the replacement welding band comprises positive electrode welding bands and negative electrode welding bands, the positive electrode welding bands and the negative electrode welding bands being alternately distributed. Disconnecting the replacement welding band between the first connecting piece and the second connecting piece comprises: disconnecting the positive electrode welding bands and the negative electrode welding bands between the first connecting piece and the second connecting piece. The positive electrode welding band between the first connecting piece and the battery piece to be processed is disconnected, and the negative electrode welding band between the second connecting piece and the battery piece to be processed is disconnected.

[0015] Further, the battery string includes a plurality of battery pieces and a welding strip group arranged on the plurality of battery pieces, the plurality of battery pieces are arranged along a preset direction, the welding strip group extends along the preset direction, the welding strip group connects the plurality of battery pieces, and the welding strip group includes a plurality of welding strips. A battery piece needing to be repaired in the battery string is defined as a first battery piece, the first battery piece is located at a head end and / or a tail end of the battery string, a battery piece connected with the first battery piece is defined as a second battery piece, and a battery piece used for replacement is defined as a replacement battery piece. The repairing method includes: disconnecting the welding strip between the first battery piece and the second battery piece; moving the replacement battery piece to one side of the second battery piece; and connecting the welding strip of the replacement battery piece and the welding strip on the second battery piece through a first connecting piece, wherein the first connecting piece has conductivity.

[0016] To achieve the above object, the application adopts the following technical scheme:

[0017] A battery string replacement repairing device, which is suitable for the above repairing method, includes a repairing platform, a cutting mechanism, a moving mechanism, and a connecting mechanism. The repairing platform is used for placing the battery string, the cutting mechanism is used for disconnecting the welding strip between the first battery piece and the two second battery pieces, the moving mechanism is used for moving the replacement battery piece and the connecting piece, and the connecting mechanism is used for connecting the second battery piece and the replacement battery piece through the connecting piece.

[0018] The above battery string replacement repairing method and the repairing device cut the welding strip to separate the first battery piece needing to be repaired and the second battery piece, and then connect the replacement battery piece and the second battery piece through the first connecting piece and the second connecting piece to realize the repairing of the battery string, without repeatedly adjusting the connection position of the replacement battery piece and the welding strip, which is beneficial to improving the repairing efficiency of the battery string. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the battery string in the embodiment of the application.

[0020] Figure 2 It is a flowchart of the battery string replacement repairing method in the embodiment of the application.

[0021] Figure 3 It is another structural schematic diagram of the battery string in the embodiment of the application.

[0022] Figure 4 It is a specific flowchart of the battery string replacement repairing method in the embodiment of the application.

[0023] Figure 5 It is a second specific flowchart of the battery string replacement repairing method in the embodiment of the application.

[0024] Figure 6 It is a third specific flowchart of the battery string replacement repairing method in the embodiment of the application.

[0025] Figure 7 A fourth specific flowchart of the battery string replacement repair method in the embodiments of the present application.

[0026] Figure 8 A fifth specific flowchart of the battery string replacement repair method in the embodiments of the present application.

[0027] Figure 9 A sixth specific flowchart of the battery string replacement repair method in the embodiments of the present application.

[0028] Figure 10 A flowchart of step S111 in the battery string replacement repair method in the embodiments of the present application.

[0029] Figure 11 A flowchart of the manufacturing method of the replacement battery piece in the battery string replacement repair method in the embodiments of the present application.

[0030] Figure 12 Another flowchart of the manufacturing method of the replacement battery piece in the battery string replacement repair method in the embodiments of the present application.

[0031] Figure 13 A specific flowchart of step Q3 in the embodiments of the present application.

[0032] Figure 14 A flowchart of another battery string replacement repair method in the embodiments of the present application.

[0033] Figure 15 A structural schematic diagram of the battery string replacement repair device in the embodiments of the present application.

[0034] Figure 16 A structural schematic diagram of the fixing mechanism of the battery string replacement repair device in the embodiments of the present application. DETAILED DESCRIPTION

[0035] In order to make the personnel in the art better understand the present application, the technical solutions in the specific embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application.

[0036] It should be noted that the terms "first", "second", and similar terms used in the specification and claims of the present application do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not denote a quantity limitation, but indicate the presence of at least one. "Multiple" or "several" means at least two. Unless otherwise indicated, the terms "front", "back", "left", "right", "lower", and / or "upper" and similar terms are used for convenience and are not limited to one position or spatial orientation. The terms "include" or "contain" or similar terms mean that the elements or objects appearing before the terms "include" or "contain" cover the elements or objects listed after the terms "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "connected" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0037] The singular forms "a", "said", and "the" used in the specification and claims of the present application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0038] In order to clearly illustrate the technical solutions of the present application, the terms "left" and "right" are defined as shown in Figure 1 .

[0039] As shown in Figure 1 , the present application provides a battery string 100, which includes a plurality of battery pieces 11 and a welding strip group 12 arranged on the battery pieces 11. The plurality of battery pieces 11 are arranged along a predetermined direction 101, and the welding strip group 12 extends along the predetermined direction 101. The predetermined direction 101 is the length direction of the battery string 100 of the present application. In the present application, the length direction of the battery string 100 is the left-right direction in Figure 1 .

[0040] Specifically, the welding strip group 12 connects the plurality of battery pieces 11, and the welding strip group 12 includes a plurality of welding strips. The plurality of battery pieces 11 are connected in conduction by the welding strips to form the battery string 100.

[0041] It should be noted that the welding strip group 12 of the present application can be a normal welding strip group or a dense welding strip group. The normal welding strip group refers to a welding strip group 12 with less than 50 welding strips, and the dense welding strip group refers to a welding strip group 12 with 50 or more welding strips.

[0042] More specifically, the battery piece 11 needing to be repaired in the battery string 100 is defined as the first battery piece 111, the battery piece 11 on both sides of the first battery piece 111 along the preset direction 101 is defined as the second battery piece 112, and the battery piece 11 used for replacement is defined as the replacement battery piece 113.

[0043] More specifically, the replacement battery piece 113 is connected with a welding strip, and the battery string 100 further comprises a first connecting piece 13 and a second connecting piece 14. The first connecting piece 13 and the second connecting piece 14 are used to connect the welding strip on the replacement battery piece 113 to the welding strip group 12 between the first battery piece 111 and the second battery piece 112.

[0044] In this way, through the connection of the first connecting piece 13 and the second connecting piece 14, the replacement battery piece 113 can replace the first battery piece 111 in the battery string 100, so that the repair of the battery string 100 can be realized, thereby eliminating the need to peel the first battery piece 111 from the welding strip group 12 and eliminating the need to connect the replacement battery piece 113 grid line with the welding strip group 12, thereby facilitating the improvement of the repair efficiency of the battery string 100.

[0045] It should be noted that the extension direction of the welding strip on the replacement battery piece 113 is consistent with the extension direction of the welding strip on the battery string 100.

[0046] It should be noted that the first connecting piece 13 and the second connecting piece 14 are both conductive, so that the welding strip on the replacement battery piece 113 and the welding strip on the second battery piece 112 are connected and conductive through the first connecting piece 13 and the second connecting piece 14.

[0047] For example, the first connecting piece 13 and the second connecting piece 14 can be bus bars, which are used to connect and conduct the welding strip on the second battery piece 112 and the welding strip on the replacement battery piece 113, so as to realize the conduction of the battery string 100.

[0048] It should be noted that the first connecting piece 13 and the second connecting piece 14 can also be other components with conductivity, such as metal strips, and the present application does not limit this. In addition, the materials of the first connecting piece 13 and the second connecting piece 14 can be consistent or inconsistent.

[0049] It should be noted that the first battery piece 111 of the present application can be a single battery piece or a plurality of continuous battery pieces, and therefore the present application does not limit the number of battery pieces of the first battery piece 111. Secondly, the replacement battery piece 113 of the present application can be at least one battery piece. In addition, the number of battery pieces in the replacement battery piece 113 and the number of battery pieces in the first battery piece 111 can be consistent or inconsistent, as long as the repaired battery string 100 can meet the working requirements.

[0050] In addition, the number of the welding strips on the replacement battery piece 113 can be consistent with or inconsistent with the number of the welding strips in the welding strip group 12, and the application does not make any limitation thereon, as long as the battery string 100 can work after the replacement battery piece 113 is connected with the second battery piece 112.

[0051] As shown in Figure 2 the application provides a battery string 100 replacement repair method, which comprises the following steps:

[0052] S1: disconnect the welding strips between the first battery piece 111 and the two second battery pieces 112;

[0053] In step S1, the first battery piece 111 that needs to be repaired can be taken out of the battery string 100 after the welding strips are disconnected.

[0054] S2: move the replacement battery piece 113 to between the two second battery pieces 112;

[0055] In step S2, the replacement battery piece 113 can fill the vacancy of the first battery piece 111 in the battery string 100, so as to facilitate the formation of a complete battery string 100 through subsequent steps.

[0056] S3: connect the welding strips on one side of the replacement battery piece 113 with the welding strips on one of the second battery pieces 112 through the first connecting piece 13, and connect the welding strips on the other side of the replacement battery piece 113 with the welding strips on the other second battery piece 112 through the second connecting piece 14.

[0057] In step S3, the first connecting piece 13 and the second connecting piece 14 can respectively connect the welding strips on both sides of the replacement battery piece 113 with the welding strips on the two second battery pieces 112, so as to realize the conduction between the replacement battery piece 113 and the two second battery pieces 112.

[0058] Through the above steps, the first battery piece 111 does not need to be hot-melted and peeled off from the welding strip group 12, which is conducive to improving the separation efficiency of the first battery piece 111 on the battery string 100, thereby improving the repair efficiency of the battery string 100. In addition, the conduction between the replacement battery piece 113 and the second battery piece 112 is realized through the first connecting piece 13 and the second connecting piece 14, so that the grid lines on the replacement battery piece 113 do not need to be connected with the welding strip group 12, thereby further improving the repair efficiency of the battery string 100.

[0059] It should be noted that in the above process or the flowchart of the accompanying drawings, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in an order different from that here. For example, step S1 can be performed after step S2, or step S1 can be performed after step S3, and the application does not make any limitation thereon.

[0060] As an implementation, the first connecting piece 13 and the second connecting piece 14 are each provided with one, the solder strips on the one side of the replacement battery piece 113 are connected with the solder strips on one of the second battery pieces 112 through the first connecting piece 13, and the solder strips on the other side of the replacement battery piece 113 are connected with the solder strips on the other of the second battery pieces 112 through the second connecting piece 14. In this way, since the number of the first connecting piece 13 and the second connecting piece 14 is only one, the connecting process of the first connecting piece 13 and the solder strips can be simplified, and the connecting process of the second connecting piece 14 and the solder strips can be simplified, which is beneficial to improve the connecting efficiency of the replacement battery piece 113 and the second battery piece 112.

[0061] As another implementation, as shown in Figure 3 the first connecting piece 13 and the second connecting piece 14 are each provided with multiple, the multiple first connecting pieces 13 are connected with each other, the multiple second connecting pieces 14 are connected with each other, the solder strips on the one side of the replacement battery piece 113 are respectively connected with the solder strips on one of the second battery pieces 112 through the multiple first connecting pieces 13, and the solder strips on the other side of the replacement battery piece 113 are respectively connected with the solder strips on the other of the second battery pieces 112 through the multiple second connecting pieces 14. In this way, the multiple first connecting pieces 13 and the multiple second connecting pieces 14 can improve the connecting stability of the replacement battery piece 113 and the second battery piece 112, so as to avoid that the single first connecting piece 13 and the single second connecting piece 14 are separated from the solder strips, and the replacement battery piece 113 and the two second battery pieces 112 are separated, which is beneficial to improve the use stability of the battery string 100.

[0062] For example, the first connecting piece 13 and the second connecting piece 14 are connected with the solder strips through bonding or welding, so as to realize the connection and conduction of the replacement battery piece 113 and the second battery piece 112. It should be noted that the application does not limit the connecting mode of the first connecting piece 13 and the solder strips, and the connecting mode of the second connecting piece 14 and the solder strips, as long as the first connecting piece 13 and the second connecting piece 14 can realize the connection and conduction of the replacement battery piece 113 and the two second battery pieces 112.

[0063] As shown in Figure 4 , as an implementation, the first connecting piece 13 and the second connecting piece 14 are first connected with the solder strips on the two sides of the replacement battery piece 113, respectively, and then the first connecting piece 13 and the second connecting piece 14 are connected with the two second battery pieces 112, respectively.

[0064] Specifically, the step S3 includes the following steps:

[0065] S31: connecting the first connecting piece 13 with the solder strips on the one side of the replacement battery piece 113;

[0066] S32: Connect the second connector 14 to the solder strip on the other side of the replacement battery cell 113;

[0067] S33: Connect the first connector 13 to the solder strip on one of the second battery cells 112, and connect the second connector 14 to the solder strip on the other second battery cell 112.

[0068] In steps S31 and S32, the first connector 13 and the second connector 14 can constrain the solder strips on both sides of the replacement battery cell 113 to prevent the solder strips on both sides of the replacement battery cell 113 from becoming scattered, thereby improving the connection efficiency between the replacement battery cell 113 and the second battery cell 112.

[0069] Therefore, in this embodiment, the rework method includes the following steps:

[0070] S1: Disconnect the solder strip between the first battery cell 111 and the two second battery cells 112;

[0071] S2: Move the replacement battery cell 113 between the two second battery cells 112;

[0072] S31: The solder strip connecting the first connector 13 to one side of the replacement battery cell 113;

[0073] S32: Connect the second connector 14 to the solder strip on the other side of the replacement battery cell 113;

[0074] S33: Connect the first connector 13 to the solder strip on one of the second battery cells 112, and connect the second connector 14 to the solder strip on the other second battery cell 112.

[0075] Through the above steps, the solder strip on the replacement battery cell 113 can be connected and made conductive with the solder strip on the two second battery cells 112 through the first connector 13 and the second connector 14, thereby realizing the repair of the battery string 100.

[0076] It should be noted that although the logical order is shown in the flowchart above or in the accompanying drawings, in some cases, the steps shown or described may be performed in a different order than that shown here. For example, steps S31 and S32 can be interchanged. Alternatively, step S2 may be performed after step S31, or after step S32, or after step S33; this application does not impose any restrictions.

[0077] like Figure 5 As shown, in another embodiment, the first connector 13 and the second connector 14 are first connected to the solder strips on the second battery cell 112 on both sides of the first battery cell 111, and then the first connector 13 and the second connector 14 are connected to the solder strips on both sides of the replacement battery cell 113.

[0078] Specifically, the step S3 comprises the following steps:

[0079] S31: connecting the first connecting piece 13 with the solder strip on one of the second battery pieces 112;

[0080] S32: connecting the second connecting piece 14 with the solder strip on the other second battery piece 112;

[0081] S33: connecting the first connecting piece 13 with the solder strip on one side of the replacement battery piece 113, and connecting the second connecting piece 14 with the solder strip on the other side of the replacement battery piece 113.

[0082] In the step S31 and the step S32, the solder strips of the two second battery pieces 112 can be respectively constrained by the first connecting piece 13 and the second connecting piece 14, so as to avoid the solder strips of the two second battery pieces 112 from being scattered, thereby improving the connecting efficiency of the replacement battery piece 113 and the second battery pieces 112, and further improving the repair efficiency of the battery string 100.

[0083] Therefore, in the embodiment, the repair method comprises the following steps:

[0084] S1: disconnecting the solder strip between the first battery piece 111 and the two second battery pieces 112;

[0085] S2: moving the replacement battery piece 113 to between the two second battery pieces 112;

[0086] S31: connecting the first connecting piece 13 with the solder strip on one of the second battery pieces 112;

[0087] S32: connecting the second connecting piece 14 with the solder strip on the other second battery piece 112;

[0088] S33: connecting the first connecting piece 13 with the solder strip on one side of the replacement battery piece 113, and connecting the second connecting piece 14 with the solder strip on the other side of the replacement battery piece 113.

[0089] Through the above steps, the solder strips on the replacement battery piece 113 and the solder strips on the two second battery pieces 112 can be connected and conducted through the first connecting piece 13 and the second connecting piece 14, thereby realizing the repair of the battery string 100.

[0090] It should be noted that in the above process or the flowchart of the accompanying drawings, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in an order different from that here. For example, the step S31 and the step S32 can be interchanged, or the above step S2 can be performed after the step S31, or the step S2 can be performed after the step S32, or the step S2 can be performed after the step S33, which is not limited by the present application.

[0091] like Figure 6 As shown, in another embodiment, the first connector 13 first connects to the solder strip on one of the second battery cells 112, the second connector 14 first connects to the solder strip on one side of the replacement battery cell 113, then the first connector 13 connects to the solder strip on the other side of the replacement battery cell 113, and the second connector 14 connects to the solder strip on the other second battery cell 112.

[0092] Specifically, step S3 includes the following steps:

[0093] S31: Connecting the first connector 13 to the solder strip on one of the second battery cells 112;

[0094] S32: The solder strip connecting the second connector 14 to the side of the replacement battery cell 113;

[0095] S33: Connect the first connector 13 to the solder strip on the other side of the replacement battery cell 113, and connect the second connector 14 to the solder strip on another second battery cell 112.

[0096] In step S31, the solder ribbon on a second battery cell 112 can be fixed by the first connector 13 to prevent the solder ribbon on the second battery cell 112 from becoming scattered, which is beneficial for replacing the connection between the battery cell 113 and the second battery cell 112.

[0097] In step S32, the solder strip on one side of the replacement cell 113 can be fixed by the second connector 14 to prevent the solder strip on that side from becoming scattered, which is beneficial for the connection between the replacement cell 113 and the second cell 112.

[0098] Therefore, in this embodiment, the rework method includes the following steps:

[0099] S1: Disconnect the solder strip between the first battery cell 111 and the two second battery cells 112;

[0100] S2: Move the replacement battery cell 113 between the two second battery cells 112;

[0101] S31: Connecting the first connector 13 to the solder strip on one of the second battery cells 112;

[0102] S32: The solder strip connecting the second connector 14 to the side of the replacement battery cell 113;

[0103] S33: Connect the first connector 13 to the solder strip on the other side of the replacement battery cell 113, and connect the second connector 14 to the solder strip on another second battery cell 112.

[0104] Through the above steps, the welding strips on the replacement battery piece 113 and the welding strips on the two second battery pieces 112 connected and conducted through the first connecting piece 13 and the second connecting piece 14, so as to realize the repair of the battery string 100.

[0105] It should be noted that in the above flow or the flowchart of the accompanying drawings, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in an order different from here. For example, step S31 and step S32 can be interchanged. Or the above step S2 can be executed after step S31, or step S2 can be executed after step S32, or step S2 can be executed after step S33, which is not limited by the present application.

[0106] As shown in Figure 7 As another embodiment, the first connecting piece 13 and the second connecting piece 14 are both two. Among them, the two first connecting pieces 13 are connected with the welding strip on one of the second battery pieces 112 and the welding strip on one side of the replacement battery piece 113, and the two second connecting pieces 14 are connected with the welding strip on the other second battery piece 112 and the welding strip on the other side of the replacement battery piece 113.

[0107] Specifically, step S3 includes the following steps:

[0108] S31: Connect one of the first connecting pieces 13 with the welding strip on one of the second battery pieces 112, and connect the other first connecting piece 13 with the welding strip on one side of the replacement battery piece 113;

[0109] S32: Connect one of the second connecting pieces 14 with the welding strip on the other second battery piece 112, and connect the other second connecting piece 14 with the welding strip on the other side of the replacement battery piece 113;

[0110] S33: Connect the two first connecting pieces 13, and connect the two second connecting pieces 14.

[0111] In steps S31 and S32, the welding strips on the two second battery pieces 112 and the welding strips on the two sides of the replacement battery piece 113 can be fixed through the two first connecting pieces 13 and the two second connecting pieces 14, so as to avoid the above welding strips from being scattered, thereby facilitating the connection of the replacement battery piece 113 and the second battery piece 112, and further facilitating the improvement of the repair efficiency of the battery string 100.

[0112] Therefore, in the present embodiment, the repair method comprises the following steps:

[0113] S1: disconnect the welding strips between the first battery piece 111 and the two second battery pieces 112;

[0114] S2: Move the replacement battery cell 113 between the two second battery cells 112;

[0115] S31: Connect one of the first connectors 13 to the solder strip on one of the second cell 112, and connect the other first connector 13 to the solder strip on the side of the replacement cell 113;

[0116] S32: Connect one of the second connectors 14 to the solder strip on the other second cell 112, and connect the other second connector 14 to the solder strip on the other side of the replacement cell 113;

[0117] S33: Connect two first connectors 13 and connect two second connectors 14.

[0118] Through the above steps, the solder strips on the replacement battery cell 113 and the solder strips on the two second battery cells 112 can be connected and made conductive through the first connector 13 and the second connector 14, thereby realizing the repair of the battery string 100.

[0119] It should be noted that although the logical order is shown in the flowchart above or in the accompanying drawings, in some cases, the steps shown or described may be performed in a different order than that shown here. For example, steps S31 and S32 can be interchanged. Alternatively, step S2 may be performed after step S31, or after step S32, or after step S33; this application does not impose any restrictions.

[0120] like Figure 8 As shown, in one embodiment, this application can first connect the replacement battery cell 113 between the two second battery cells 112, and then remove the first battery cell 111. At this time, in step S2, when the replacement battery cell 113 is moved between the two second battery cells 112, the replacement battery cell 113 is located above the first battery cell 111.

[0121] Therefore, in this embodiment, the rework method includes the following steps:

[0122] S2: Move the replacement battery cell 113 between the two second battery cells 112, at which point the replacement battery cell 113 is located above the first battery cell 111.

[0123] In this embodiment, step S2 allows the replacement battery cell 113 to cover the first battery cell 111, which is beneficial for filling the gap in the first battery cell 111 later.

[0124] S3: connecting the welding band on the side of the replacement battery piece 113 to the welding band on one of the second battery pieces 112 through the first connecting piece 13, and connecting the welding band on the other side of the replacement battery piece 113 to the welding band on the other second battery piece 112 through the second connecting piece 14;

[0125] In step S3, the replacement battery piece 113 is connected and conducted through the first connecting piece 13 and the second connecting piece 14.

[0126] Since the first battery piece 111 needs to be removed at this time, the repair method further includes the following steps:

[0127] S4: Turn over the battery string 100, and the replacement battery piece 113 is located below the first battery piece 111.

[0128] Through the above setting, the replacement battery piece 113 will not be damaged and will not interfere with the removal of the first battery piece 111 during the subsequent removal process of the first battery piece 111.

[0129] In addition, in the present application, step S1 is the final step, that is, at this time, step S1 is performed after step S4, and the first battery piece 111 that needs to be repaired can be taken out from the battery string 100 after the welding band is disconnected.

[0130] Through the above steps, the welding band on the replacement battery piece 113 can be connected and conducted with the welding band on the two second battery pieces 112 through the first connecting piece 13 and the second connecting piece 14, thereby realizing the repair of the battery string 100.

[0131] As shown in FIG. 1, as an embodiment, the welding band between the first battery piece 111 and the two second battery pieces 112 is defined as a pre-disconnection section. Then step S3 includes the following steps: Figure 9

[0132] S31: connecting the first connecting piece 13 to the pre-disconnection section on one side of the first battery piece 111;

[0133] S32: connecting the second connecting piece 14 to the pre-disconnection section on the other side of the first battery piece 111;

[0134] S33: connecting the first connecting piece 13 to the welding band on one side of the replacement battery piece 113, and connecting the second connecting piece 14 to the welding band on the other side of the replacement battery piece 113.

[0135] ​In step S31 and step S32, the welding band on one side of the first battery piece 111 can be constrained by the first connecting piece 13, and the welding band on the other side of the first battery piece 111 can be constrained by the second connecting piece 14, so as to avoid the scattering of the welding band on both sides of the first battery piece 111 after the welding band is cut off, and facilitate the replacement of the connection between the replacement battery piece 113 and the first battery piece 111.

[0136] Secondly, in the present embodiment, step S1 comprises the following steps:

[0137] S11: disconnect the pre-disconnection section from the first battery piece 111;

[0138] That is, in the present embodiment, the first battery piece 111 is separated from the two second battery pieces 112 by disconnecting the pre-disconnection section, so as to take out the first battery piece 111 from the battery string 100.

[0139] Therefore, in the present embodiment, the repair method comprises:

[0140] S11: disconnect the pre-disconnection section from the first battery piece 111;

[0141] S2: move the replacement battery piece 113 between the two second battery pieces 112;

[0142] S31: connect the first connecting piece 13 with the pre-disconnection section on one side of the first battery piece 111;

[0143] S32: connect the second connecting piece 14 with the pre-disconnection section on the other side of the first battery piece 111;

[0144] S33: connect the first connecting piece 13 with the welding band on one side of the replacement battery piece 113, and connect the second connecting piece 14 with the welding band on the other side of the replacement battery piece 113.

[0145] Through the above steps, the welding band on the replacement battery piece 113 can be connected and conducted with the welding band on the two second battery pieces 112 through the first connecting piece 13 and the second connecting piece 14, so as to realize the repair of the battery string 100.

[0146] It should be noted that in the above flow or the flowchart of the accompanying drawings, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in an order different from that here. For example, step S2 can be performed after step S31, or step S2 can be performed after step S32, step S11 can be performed after step S2, step S11 can be performed after step S31, step S11 can be performed after step S32, step S11 can be performed after step S33, and the present application is not limited.

[0147] Secondly, when step S11 is executed after step S32, and step S11 is executed after step S33, the first connecting piece 13 and the second connecting piece 14 are respectively connected to one second battery piece 112 through one pre-breaking section, so that the first connecting piece 13 and the second connecting piece 14 can constrain the solder strips of the two second battery pieces 112, to avoid the solder strips of the second battery pieces 112 from being scattered when the pre-breaking section is broken, and thus facilitate the connection of the replacement battery piece 113 and the second battery piece 112.

[0148] As shown in Figure 10 , as an embodiment, one end of the pre-breaking section connected to the first battery piece 111 is defined as a first connecting end, and one end of the pre-breaking section connected to the second battery piece 112 is defined as a second connecting end. The first connecting end can be located at the edge of the first battery piece 111, or the distance between the first connecting end and the edge of the first battery piece 111 is less than the distance between the first connecting end and the second connecting end.

[0149] Then, the above step S11 includes the following steps:

[0150] S111: breaking the first connecting end and the first battery piece 111, so that the length of the pre-breaking section meets the preset length.

[0151] In step S111, the preset length is the length of the solder strip on the second battery piece 112 that can be connected to the replacement battery piece 113, so that after the first battery piece 111 and the second battery piece 112 are broken, the length of the solder strip on the second battery piece 112 can meet the connection requirement of the second battery piece 112 and the replacement battery piece 113.

[0152] As shown in Figure 11 , as an embodiment, the solder strip on the replacement battery piece 113 is defined as a replacement solder strip. In order to obtain the replacement battery piece 113, the repair method further includes a manufacturing method of the replacement battery piece 113, which includes the following steps:

[0153] Q1: placing a plurality of battery pieces to be processed, a plurality of first connecting pieces 13 and a plurality of second connecting pieces 14 on a carrier, and placing one first connecting piece 13 and one second connecting piece 14 between adjacent two battery pieces to be processed;

[0154] In step Q1, the carrier can be a flat plate structure or a roller structure, as long as it can place the battery pieces to be processed, the first connecting pieces 13 and the second connecting pieces 14, and the form of the carrier is not limited in the present application. In addition, the carrier is taken as a roller structure for illustration in the present application.

[0155] Q2: winding the replacement ribbon on the carrier so that the replacement ribbon is connected to the plurality of battery pieces to be processed, the plurality of first connecting pieces 13 and the plurality of second connecting pieces 14;

[0156] In step Q2, the replacement ribbon can be connected to the battery pieces to be processed, the first connecting pieces 13 and the second connecting pieces 14 by means of adhesion or welding. It should be noted that the present application does not limit the connection mode of the replacement ribbon to the above-mentioned components, as long as the replacement ribbon can be fixed to the above-mentioned components.

[0157] Q3: disconnecting the replacement ribbon between the first connecting pieces 13 and the second connecting pieces 14 to form the combination of the replacement battery pieces 113, the first connecting pieces 13 and the second connecting pieces 14.

[0158] In step Q3, the replacement ribbon between the first connecting pieces 13 and the second connecting pieces 14 is cut by a grinding wheel or a laser to facilitate the formation of the combination of the replacement battery pieces 113, the first connecting pieces 13 and the second connecting pieces 14. It should be noted that the present application does not limit the cutting mode of the replacement ribbon between the first connecting pieces 13 and the second connecting pieces 14.

[0159] As shown in FIG. 1, as another embodiment, the present application can first wind the replacement ribbon on the carrier, and then place the plurality of battery pieces to be processed, the plurality of first connecting pieces 13 and the plurality of second connecting pieces 14 on the carrier. Figure 12

[0160] Therefore, in the present embodiment, the manufacturing method comprises the following steps:

[0161] Q1: winding the replacement ribbon on a carrier;

[0162] Q2: placing the plurality of battery pieces to be processed, the plurality of first connecting pieces 13 and the plurality of second connecting pieces 14 on the carrier so that the plurality of battery pieces to be processed, the plurality of first connecting pieces 13 and the plurality of second connecting pieces 14 are connected to the replacement ribbon; wherein one first connecting piece 13 and one second connecting piece 14 are placed between two adjacent battery pieces to be processed;

[0163] Q3: disconnecting the replacement ribbon between the first connecting pieces 13 and the second connecting pieces 14 to form the combination of the replacement battery pieces 113, the first connecting pieces 13 and the second connecting pieces 14.

[0164] From the above, it can be seen that the present application does not limit whether the replacement ribbon is wound on the carrier first or the battery pieces to be processed, the first connecting pieces 13 and the second connecting pieces 14 are placed on the carrier first.

[0165] As shown in FIG. 1, as another embodiment, the present application can first wind the replacement ribbon on the carrier, and then place the plurality of battery pieces to be processed, the plurality of first connecting pieces 13 and the plurality of second connecting pieces 14 on the carrier. Figure 13 ​As shown, in one embodiment, the battery string 100 includes a BC battery (Back Contact) or a TOPCon battery (Tunnel Oxide Passivated Contact). Specifically, the replacement solder strips include positive electrode solder strips and negative electrode solder strips. The positive electrode solder strips and negative electrode solder strips are alternately distributed.

[0166] Because the positive and negative electrode solder strips of the BC battery cells need to be broken alternately, step Q3 above includes the following steps to obtain a replacement BC battery cell 113:

[0167] Q31: Disconnect the positive and negative electrode solder strips between the first connector 13 and the second connector 14;

[0168] In step Q31, after disconnecting the positive electrode solder strip and the negative electrode solder strip, a combination of replacement battery cell 113, first connector 13 and second connector 14 can be obtained.

[0169] Q32: Disconnect the positive electrode solder strip between the first connector 13 and the battery cell to be processed, and disconnect the negative electrode solder strip between the second connector 14 and the battery cell to be processed.

[0170] In step Q31, the positive electrode solder strip and the negative electrode solder strip are disconnected respectively to obtain an assembly of a replacement battery cell 113, a first connector 13 and a second connector 14 that can be adapted to the BC battery.

[0171] It should be noted that since the positive and negative electrode solder strips of the TOPCon battery cells do not need to be broken at intervals, when obtaining the replacement battery cell 113 of the TOPCon battery, it is not necessary to break the positive and negative electrode solder strips separately in the above steps Q31 and Q32.

[0172] like Figure 14 As shown, in another embodiment, the first battery cell 111 is located at the beginning and / or end of the battery string 100. In this case, there is only one second battery cell 112 connected to the first battery cell 111. The rework method then includes the following steps:

[0173] U1: Disconnect the solder strip between the first battery cell 111 and the second battery cell 112;

[0174] In step U1, since the first battery cell 111 is located at the beginning and / or end of the battery string 100, it is only necessary to disconnect the solder strip on one side of the first battery cell 111 to separate the first battery cell 111 from the second battery cell 112.

[0175] U2: Move the replacement battery cell 113 to one side of the second battery cell 112;

[0176] In step U1, the replacement cell tab 113 can fill the vacancy of the first cell tab 111 in the battery string 100 to form a complete battery string 100.

[0177] U3: connecting the solder tape of the replacement cell tab 113 with the solder tape on the second cell tab 112 through the first connecting piece 13, wherein the first connecting piece 13 has electrical conductivity.

[0178] In step U3, the replacement cell tab 113 can be connected with the second cell tab 112 through the first connecting piece 13.

[0179] Through the above steps, the first cell tab 111 at the head end and / or tail end of the battery string 100 can be replaced by the replacement cell tab 113, so as to realize the repair of the battery string 100.

[0180] It should be noted that in the above process or the flowchart of the accompanying drawings, although the logical order is shown in the flowchart, in some cases, the steps shown or described can be performed in an order different from that here. For example, step U1 can be performed after step U2, or step U1 can be performed after step U3, which is not limited by the present application.

[0181] As shown in Figure 15 The present application provides a battery string 100 replacement repair device 200, which includes a repair platform 21, a cutting mechanism 22, a moving mechanism (not shown in the figure) and a connecting mechanism (not shown in the figure). Wherein, the repair platform 21 is used for placing the battery string 100; the cutting mechanism 22 is used for cutting the solder tape between the first cell tab 111 and the two second cell tabs 112; the moving mechanism is used for moving the replacement cell tab 113 and the connecting piece; the connecting mechanism is used for connecting the second cell tab 112 with the replacement cell tab 113 through the connecting piece.

[0182] In this way, the battery string 100 that needs to be repaired is placed on the repair platform 21. The first cell tab 111 and the second cell tab 112 are cut by the cutting mechanism 22, so that the first cell tab 111 is separated from the battery string 100. The replacement cell tab 113 is moved to the position where the first cell tab 111 is originally placed by the moving mechanism, so that the replacement cell tab 113 can fill the vacancy of the first cell tab 111. The connecting mechanism connects the replacement cell tab 113 with the second cell tab 112 through the connecting piece.

[0183] It should be noted that when the first cell tab 111 is located in the middle part of the battery string 100, the above connecting piece is the first connecting piece 13 and the second connecting piece 14. When the first cell tab 111 is located at the head end or tail end of the battery string 100, the above connecting piece is the first connecting piece 13.

[0184] Exemplarily, the cutting mechanism 22 can be a grinding wheel or a laser cutting machine, so that the welding band between the first battery piece 111 and the second battery piece 112 can be cut off by the cutting mechanism 22, to facilitate the separation of the first battery piece 111 from the battery string 100.

[0185] Exemplarily, the moving mechanism is a mechanical arm, so that the replacement battery piece 113 and the connecting piece can be moved by the moving mechanism, to facilitate the automatic repair of the battery string 100.

[0186] It should be noted that the number of moving mechanisms can be one, and one moving mechanism can move the replacement battery piece 113 and the connecting piece at the same time. Or the number of moving mechanisms can be two, and two moving mechanisms can move the replacement battery piece 113 and the connecting piece respectively. Or the number of moving mechanisms can be three, and three moving mechanisms can move the replacement battery piece 113, the first connecting piece 13 and the second connecting piece 14 respectively.

[0187] It should be noted that when the connecting piece is arranged on the welding band of the replacement battery piece 113, the moving mechanism is used to move the connecting piece to the carrier. When the connecting piece is arranged on the welding band of the second battery piece 112, the moving mechanism is used to move the connecting piece to the battery string 100 of the repair platform 21.

[0188] Exemplarily, the connecting mechanism can be an electric heating lamp, and the welding bands on the replacement battery piece 113 and the second battery piece 112 are heated by the connecting mechanism, so that the welding bands on the replacement battery piece 113 and the second battery piece 112 are connected and conducted with the connecting piece, so that the welding bands on the replacement battery piece 113 and the second battery piece 112 can be welded and conducted.

[0189] As shown in Figure 15 and Figure 16 As an embodiment, after the cutting mechanism 22 disconnects the welding band between the first battery piece 111 and the two second battery pieces 112, the welding band connected with the second battery piece 112 is defined as a reserved section. The repair device 200 further comprises a fixing mechanism 23, and the fixing mechanism 23 is used to fix the reserved section. In this way, the reserved section can be restrained by the fixing mechanism 23 to avoid the reserved section from being scattered and causing the second battery piece 112 to fail to form a connection with the connecting piece, which is conducive to improving the repair efficiency of the battery string 100.

[0190] Specifically, the fixing mechanism 23 includes a first fixing member 231 and a second fixing member 232. A fixing region for fixing the retained section is formed between the first fixing member 231 and the second fixing member 232. At least one of the first fixing member 231 and the second fixing member 232 has a fixing notch 233 located in the fixing region. The fixing notch 233 is used to limit the position of the retained section. With this configuration, while the fixing mechanism 23 limits the position of the retained section, the fixing notch 233 allows the solder strips of the retained section to be separated from each other, thereby improving the neatness of the solder strips of the retained section. This facilitates the connection between the second battery cell 112 and the connector, and further facilitates the connection between the second battery cell 112 and the replacement battery cell 113.

[0191] More specifically, the fixing notch 233 is one of a fixing groove, a fixing hole, or a fixing tooth. The number of retained segments is 50 to 500 (i.e., the welding strip group 12 in this application is a dense welding strip group). When the retained segments are within the fixing area, each retained segment is fixed in a fixing groove, a fixing hole, or a fixing tooth. This arrangement can improve the neatness of the retained segments, thereby improving the connection efficiency between the second battery cell 112 and the connector.

[0192] It should be noted that the fixing notch 233 can also be other shapes, as long as the welding strip can be fixed through the fixing notch 233. This application does not impose any restrictions on this.

[0193] In one implementation, after the retaining segment is fixed by the fixing mechanism 23, the retaining segment is connected to the first connecting member 13, and / or, the retaining segment is connected to the second connecting member 14. Specifically, after the retaining segment is fixed by the fixing mechanism 23, the fixing mechanism 23 can be moved to a position close to the first connecting member 13 or the second connecting member 14 by the moving mechanism, thereby facilitating the connection of the retaining segment to the first connecting member 13 or the second connecting member 14. This arrangement prevents the retaining segment from becoming scattered, facilitating the connection between the retaining segment and the first connecting member 13, and also facilitating the connection between the retaining segment and the second connecting member 14, thereby improving the connection efficiency between the retaining segment and the first connecting member 13, and the connection efficiency between the retaining segment and the second connecting member 14.

[0194] like Figure 15 As shown, in one embodiment, the battery string 100 replacement and repair device 200 further includes a detection camera 24 and a power supply assembly (not shown). The detection camera 24 is used to detect whether there is a first battery cell 111 that needs to be repaired on the battery string 100. When the battery string 100 is placed on the repair platform 21, the power supply assembly powers the battery string 100 so that the detection camera 24 can detect whether there is a first battery cell 111 on the battery string 100.

[0195] It should be noted that when there is a battery piece 11 on the battery string 100 that needs to be repaired, the brightness of the first battery piece 111 after being powered on is different from that of other battery pieces 11, so that the detection camera 24 can determine whether the battery piece 11 needs to be repaired according to the brightness of the battery piece 11.

[0196] As an embodiment, a plurality of groups of adsorption holes 211 are arranged on the repair platform 21, each battery piece 11 in the battery string 100 is located on a group of adsorption holes 211, and a negative pressure can be formed in the adsorption hole 211, so that the adsorption hole 211 can adsorb the battery string 100, thereby facilitating the fixation of the battery string 100 on the repair platform 21. When the first battery piece 111 and the second battery piece 112 are disconnected, the adsorption hole 211 adsorbing the first battery piece 111 no longer forms a negative pressure, so that the first battery piece 111 can be separated from the battery string 100. When the replacement battery piece 113 moves to the position where the first battery piece 111 is originally placed, the adsorption hole 211 at this position forms a negative pressure, so that the repair platform 21 can fix the replacement battery piece 113, thereby facilitating the connection of the replacement battery piece 113 and the second battery piece 112.

[0197] Taking the case of first disconnecting the welding band between the first battery piece 111 and the two second battery pieces 112, then moving the replacement battery piece 113 between the two battery pieces 11, and the first connecting piece 13 and the second connecting piece 14 being located on the replacement battery piece 113 as an example, the working process of the battery string 100 replacement repair device 200 of the present application is as follows:

[0198] First, place the battery string 100 on the repair platform 21, fix the battery string 100 on the repair platform 21 through the adsorption hole 211, then power on the battery string 100 through the power-on assembly, and detect whether there is a first battery piece 111 on the battery string 100 through the detection camera 24. If there is a first battery piece 111, cut the welding band between the first battery piece 111 and the second battery pieces 112 on both sides through the cutting mechanism 22, at this time, the adsorption hole 211 at the first battery piece 111 no longer forms a negative pressure, thereby facilitating the separation of the first battery piece 111 from the battery string 100. Then remove the first battery piece 111 through the moving mechanism, and move the replacement battery piece 113 between the two second battery pieces 112, at this time, the adsorption hole 211 at the replacement battery piece 113 forms a negative pressure, so that the replacement battery piece 113 can be fixed on the repair platform 21. Then connect the first connecting piece 13 and the second connecting piece 14 to the two second battery pieces 112 respectively through the connecting mechanism, to complete the preliminary repair of the battery piece 11. Finally, detect whether there is a first battery piece 111 that needs to be repaired in the repaired battery string 100 through the power-on assembly and the detection camera 24, if there is a first battery piece 111, repeat the above steps, if there is no first battery piece 111, the repair of the battery string 100 is completed.

[0199] It is to be understood that all the improvements and changes that can be made to the above-described embodiments are to be considered as falling within the scope of the present application as defined in the appended claims.

Claims

1. A method for replacing a defective cell in a battery string, the battery string comprising a plurality of cells and a plurality of bus bars arranged on the plurality of cells, the plurality of cells being arranged along a predetermined direction, the plurality of bus bars extending along the predetermined direction, the plurality of bus bars connecting the plurality of cells, the plurality of bus bars comprising a plurality of bus bars, the method comprising: defining a defective cell in the battery string as a first cell, defining cells on both sides of the first cell along the predetermined direction as second cells, defining a replacement cell for replacing the defective cell, and defining bus bars between the first cell and the second cells as pre-disconnection sections; connecting a first connecting member to the pre-disconnection section on one side of the first cell; connecting a second connecting member to the pre-disconnection section on the other side of the first cell; disconnecting the pre-disconnection sections from the first cell, the first connecting member and the second connecting member being connected to one of the second cells through one of the pre-disconnection sections; moving the replacement cell between the second cells; and connecting the first connecting member to a bus bar on one side of the replacement cell and connecting the second connecting member to a bus bar on the other side of the replacement cell, the first connecting member and the second connecting member each having electrical conductivity. 2.The method according to claim 1, wherein: the first connecting member and the second connecting member are each provided as one, the bus bar on one side of the replacement cell and the bus bar on one of the second cells are each connected to the first connecting member, and the bus bar on the other side of the replacement cell and the bus bar on the other of the second cells are each connected to the second connecting member; or the first connecting member and the second connecting member are each provided as a plurality of members, the plurality of first connecting members are connected to each other, the plurality of second connecting members are connected to each other, the bus bar on one side of the replacement cell and the bus bar on one of the second cells are each connected to the plurality of first connecting members, and the bus bar on the other side of the replacement cell and the bus bar on the other of the second cells are each connected to the plurality of second connecting members. 3.The method according to claim 1, wherein: the first connecting member and the second connecting member are each provided as two, the method further comprises: connecting one of the first connecting members to the bus bar on one of the second cells and connecting the other of the first connecting members to the bus bar on one side of the replacement cell; connecting one of the second connecting members to the bus bar on the other of the second cells and connecting the other of the second connecting members to the bus bar on the other side of the replacement cell; moving the replacement cell between the second cells; and connecting the two first connecting members and connecting the two second connecting members. 4.The method according to any one of claims 1 to 3, wherein: one end of the pre-disconnection section connected to the first cell is defined as a first connecting end, and one end of the pre-disconnection section connected to the second cell is defined as a second connecting end; and the method further comprises: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ disconnecting the first connecting end and the first battery piece, so that the length of the pre-disconnection section meets a preset length.

5. The battery string piece replacement method of claim 1, wherein the welding strip on the replacement battery piece is defined as a replacement welding strip; and the replacement method further comprises: winding the replacement welding strip on a carrier; placing a plurality of battery pieces to be processed, a plurality of the first connecting members, and a plurality of the second connecting members on the carrier, with one of the first connecting members and one of the second connecting members being placed between two adjacent battery pieces to be processed; winding the replacement welding strip on the carrier so that the replacement welding strip is connected to a plurality of the battery pieces to be processed, a plurality of the first connecting members, and a plurality of the second connecting members; and disconnecting the replacement welding strip between the first connecting member and the second connecting member to form a combination of the replacement battery piece, the first connecting member, and the second connecting member.

6. The battery string piece replacement method of claim 1, wherein the welding strip on the replacement battery piece is defined as a replacement welding strip; and the replacement method further comprises: winding the replacement welding strip on a carrier; placing a plurality of battery pieces to be processed, a plurality of the first connecting members, and a plurality of the second connecting members on the carrier so that a plurality of the battery pieces to be processed, a plurality of the first connecting members, and a plurality of the second connecting members are connected to the replacement welding strip; wherein one of the first connecting members and one of the second connecting members are placed between two adjacent battery pieces to be processed; and disconnecting the replacement welding strip between the first connecting member and the second connecting member to form a combination of the replacement battery piece, the first connecting member, and the second connecting member.

7. The battery string piece replacement method of claim 5 or 6, wherein the replacement welding strip comprises positive electrode welding strips and negative electrode welding strips, and the positive electrode welding strips and the negative electrode welding strips are alternately distributed; and the disconnecting the replacement welding strip between the first connecting member and the second connecting member comprises: disconnecting the positive electrode welding strips and the negative electrode welding strips between the first connecting member and the second connecting member; disconnecting the positive electrode welding strips between the first connecting member and the battery piece to be processed; and disconnecting the negative electrode welding strips between the second connecting member and the battery piece to be processed.

8. A battery string piece replacement method, comprising: defining a battery piece to be replaced in a battery string as a first battery piece, and the first battery piece being located at a head end and / or a tail end of the battery string; defining a battery piece connected to the first battery piece as a second battery piece; defining a battery piece to be replaced as a replacement battery piece; defining a welding strip between the first battery piece and the second battery piece as a pre-disconnection section; and connecting a first connecting member to the pre-disconnection section on one side of the first battery piece. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ disconnecting the pre-disconnection section from the first battery piece, the first connecting piece connecting the second battery piece through the pre-disconnection section; moving the replacement battery piece to one side of the second battery piece; connecting a solder strip of the first connecting piece and the replacement battery piece, wherein the first connecting piece has electrical conductivity.

9. A battery string tab repair device adapted for use in the repair method of any one of claims 1 to 8, characterized in that, The repair device comprises: a repair platform for placing the battery string; a cutting mechanism for disconnecting a solder strip between a first battery piece and two second battery pieces; a moving mechanism for moving a replacement battery piece and a connecting piece; a connecting mechanism for connecting the second battery piece to the replacement battery piece through the connecting piece.

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