A method for connecting a battery pole piece

Abstract

The present invention discloses a method for connecting a battery pole piece, comprising: step S1, cutting the first and second connecting ends of the first battery pole segment and the second battery pole segment to be connected, and the third and fourth connecting ends on both sides of the flexible connecting tape neatly with a blade; step S2, passing the left and right ends of the first battery pole segment around the first roller and the second roller respectively, and passing the right and left ends of the second battery pole segment around the fifth roller and the fourth roller respectively, and passing the flexible connecting tape around the third roller; step S3, placing the first connecting end and the third connecting end, the fourth connecting end and the second connecting end opposite to each other, bonding the first connecting end and the third connecting end together with the first adhesive tape, and bonding the fourth connecting end and the second connecting end together with the second adhesive tape, so that the bonding place is flat, and the connecting operation is completed. The present invention introduces a connecting method of a flexible connecting tape, which can reduce the probability of the pole roll breaking again and improve the efficiency of the pole piece conveying over the roller.

Description

Technical Field

[0001] The invention relates to the technical field of lithium ion batteries, and in particular to a method for connecting battery pole pieces. Background Art

[0002] At present, lithium-ion batteries have been widely promoted and applied, and are indispensable in all walks of life and fields, such as consumer electronics, energy storage, and new energy vehicles.

[0003] The manufacturing process of lithium-ion batteries is complex and involves many steps. In the manufacturing process of lithium-ion batteries, especially in the manufacturing process of pole pieces, the problem of broken belts may occur. Specifically, in the manufacturing process of pole pieces, due to uneven force on the pole pieces and poor quality and performance of the pole pieces, a notch may appear at the edge of the pole piece at first, and then expand in a direction perpendicular to the direction of the pole piece, eventually causing the entire pole piece to break, and finally interrupting the production of the pole piece.

[0004] In order to continue production, the tape splicing operation must be carried out, and the two ends of the broken battery electrode are bonded with tape to complete the splicing. The usual splicing method is to use a knife to cut the broken ends of the two broken battery electrode pieces neatly, and then butt the broken ends of the two broken battery electrode pieces together, and then the staff will manually stick them together, directly using two pieces of tape to bond the two sides of the two battery electrode pieces.

[0005] However, this bonding method has poor bonding effect, and the battery electrode is prone to wrinkles at the bonding site. Therefore, when the electrode is stretched during the process, the wrinkles will form stress concentration points, which are easy to break again. Even if the broken ends of the two broken battery electrode sections are placed on the same horizontal plane or a certain platform during bonding, wrinkles will inevitably appear when the tape is manually pasted. No matter how carefully the operation is done, wrinkles will exist. Summary of the invention

[0006] The purpose of the present invention is to provide a method for connecting battery pole pieces in view of the technical defects in the prior art.

[0007] To this end, the present invention provides a method for connecting a battery electrode, which comprises the following steps:

[0008] Step S1, for the first battery pole segment and the second battery pole segment to be connected, define the break at the right end of the first battery pole segment and the break at the left end of the second battery pole segment as the first connection end and the second connection end, respectively, and define the two side ends of a section of flexible connecting tape as the third connection end and the fourth connection end, and then cut the first connection end and the second connection end and the third connection end and the fourth connection end neatly with a blade;

[0009] Step S2, passing the left and right ends of the first battery pole segment around the first roller and the second roller respectively, passing the right end and the left end of the second battery pole segment around the fifth roller and the fourth roller respectively, and passing the flexible guide belt around the third roller;

[0010] The first roller, the second roller, the third roller, the fifth roller and the fourth roller are rollers that rotate clockwise or counterclockwise, and rotate in the same direction;

[0011] The first roller, the third roller and the fifth roller are spaced from left to right in sequence;

[0012] A second roller shaft is located directly below the gap between the first roller shaft and the third roller shaft;

[0013] a fourth roller, located directly below the gap between the third roller and the fifth roller;

[0014] The flexible connecting belt passing around the third roller is in an inverted U shape as a whole, and the third roller is located on the inner side of the flexible connecting belt;

[0015] Step S3, the first connecting tape end at the right end of the first battery pole segment and the third connecting tape end at the left end of the flexible connecting tape are placed opposite each other, and the fourth connecting tape end at the right end of the flexible connecting tape and the second connecting tape end at the left end of the second battery pole segment are placed opposite each other, and then the first connecting tape end at the right end of the first battery pole segment and the third connecting tape end at the left end of the flexible connecting tape are bonded together with the first adhesive tape, so that the bonding point between the first adhesive tape and the flexible connecting tape is flat, and the fourth connecting tape end at the right end of the flexible connecting tape and the second connecting tape end at the left end of the second battery pole segment are bonded together with the second adhesive tape, so that the bonding point between the second adhesive tape and the flexible connecting tape is flat, thereby completing the tape connection operation.

[0016] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a method for connecting battery pole pieces, which is scientifically designed. The present invention introduces a connecting method of a flexible connecting tape, and bonds a section of the flexible connecting tape to the corresponding fractures of the two disconnected battery pole pieces through adhesive tape. Because the flexible connecting tape is flexible, the flexible connecting tape will not form wrinkles after being bonded with the adhesive tape, and will not form stress concentration points at the bonding site. Therefore, the probability of the pole roll breaking again can be reduced, and the efficiency of conveying the pole piece over the roller can be improved, thereby improving the success rate of the connection, which has great practical significance.

[0017] For the present invention, when the tape is broken or the lead tape is changed during the battery manufacturing process, the broken ends of the two broken battery pole pieces (i.e., the first connecting tape end and the second connecting tape end) are not directly glued with adhesive tape, but a flexible connecting tape is introduced, and its two ends are defined as the third connecting tape end and the fourth connecting tape end, respectively. The first connecting tape end of the flexible connecting tape and the broken end of a battery pole piece (i.e., the third connecting tape end) are glued together with adhesive tape, and the second connecting tape end of the flexible connecting tape and the broken end of another battery pole piece (i.e., the fourth connecting tape end) are glued together with adhesive tape to complete the tape splicing. The present invention uses a flexible connecting tape, which effectively improves the success rate of tape splicing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A flow chart of a method for connecting a battery electrode provided by the present invention;

[0019] Figure 2 A schematic diagram of the positional relationship between a flexible connecting belt and two disconnected sections of battery pole pieces and a plurality of rollers for rotating and transmitting the battery pole pieces and the flexible connecting belt in a method for connecting battery pole pieces provided by the present invention;

[0020] Figure 3 A schematic structural diagram of a winding device for a flexible connecting tape in a method for connecting battery pole pieces provided by the present invention. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0022] See also Figures 1 to 3 The present invention provides a method for connecting a battery electrode, comprising the following steps:

[0023] Step S1, for the first battery electrode segment 101 and the second battery electrode segment 102 that need to be connected, define the break at the right end of the first battery electrode segment 101 and the break at the left end of the second battery electrode segment 102 as the first connecting end 13 and the second connecting end 14, respectively, and define the two side ends of a section of flexible connecting tape 11 as the third connecting end 15 and the fourth connecting end 16, respectively, and then use a blade to cut the first connecting end 13 and the second connecting end 14 as well as the third connecting end 15 and the fourth connecting end 16 neatly (i.e., trim them evenly);

[0024] See also Figure 2 As shown, the break at the right end of the first pole segment 101 and the break at the left end of the second pole segment 102 are breaks at opposite sides of the first pole segment 101 and the second pole segment 102 .

[0025] Step S2, the left and right ends of the first battery pole segment 101 are respectively passed around the first roller 1701 and the second roller 1702 which are arranged vertically, and the right end and the left end of the second battery pole segment 102 are respectively passed around the fifth roller 1705 and the fourth roller 1704 which are arranged vertically, and the flexible connecting belt 11 is passed around the third roller 1703;

[0026] The first roller 1701, the second roller 1702, the third roller 1703, the fifth roller 1705 and the fourth roller 1704 are rollers that rotate clockwise or counterclockwise, and rotate in the same direction;

[0027] It should be noted that the driving rotation structure of the first roller 1701, the second roller 1702, the third roller 1703, the fifth roller 1705 and the fourth roller 1704 is a common structure known in existing battery electrode production equipment. For example, the first roller 1701, the second roller 1702, the third roller 1703, the fifth roller 1705 and the fourth roller 1704 are respectively connected to the output shaft of a motor to achieve rotational drive.

[0028] The first roller 1701, the third roller 1703 and the fifth roller 1705 are arranged in sequence from left to right;

[0029] The second roller 1702 is located directly below the gap between the first roller 1701 and the third roller 1703;

[0030] The fourth roller 1704 is located directly below the gap between the third roller 1703 and the fifth roller 1705;

[0031] The flexible connecting belt 11 passing around the third roller 1703 is in an inverted U shape as a whole, and the third roller 1703 is located on the inner side of the flexible connecting belt 11;

[0032] Step S3, the first connecting tape end 13 at the right end of the first battery pole segment 101 and the third connecting tape end 15 at the left end of the flexible connecting tape 11 are placed opposite (i.e. aligned), and the fourth connecting tape end 16 at the right end of the flexible connecting tape 11 and the second connecting tape end 14 at the left end of the second battery pole segment 102 are placed opposite, and then the first connecting tape end 13 at the right end of the first battery pole segment 101 and the third connecting tape end 15 at the left end of the flexible connecting tape 11 are bonded together with the first adhesive tape 121, so that the bonding point between the first adhesive tape 121 and the flexible connecting tape 11 is flat (i.e. without wrinkles), and the fourth connecting tape end 16 at the right end of the flexible connecting tape 11 and the second connecting tape end 14 at the left end of the second battery pole segment 102 are bonded together with the second adhesive tape 122, so that the bonding point between the second adhesive tape 122 and the flexible connecting tape 11 is flat (i.e. without wrinkles), thereby completing the tape connection operation.

[0033] In the present invention, in step S1, the first battery pole segment 101 and the second battery pole segment 102 to be connected specifically include: two battery pole segments formed due to a battery pole piece break problem during the battery manufacturing process;

[0034] Or, specifically, it includes a section of battery electrode that is about to be used up and a new section of battery electrode that is about to be connected (i.e., two sections of battery electrode when performing a reel-changing lead tape operation) during the battery manufacturing process.

[0035] In the present invention, in step S1, the first connecting belt end and the second connecting belt end are the broken ends of the pole pieces, and the third connecting belt end and the fourth connecting belt end are the two side ports of the flexible connecting belt.

[0036] In step S1, in specific implementation, the width of the flexible connecting belt 11 matches the pole pieces (i.e., the first battery pole segment 101 and the second battery pole segment 102);

[0037] The width (i.e., longitudinal width, i.e., width in the front-to-back direction perpendicular to the electrode sheet conveying direction) of the flexible guide belt 11 is in the range of 0.5-1.2 times of the electrode sheet width, i.e., 0.5-1.2 times of the width of the first battery electrode segment 101 or the second battery electrode segment 102;

[0038] The first pole segment 101 and the second pole segment 102 have the same width.

[0039] In step S1, in a specific implementation, the thickness of the flexible connecting tape 11 is in the range of 1 to 100 microns.

[0040] In step S1 , in a specific implementation, the color of the flexible connecting tape 11 is different from the color (black or grayish black) of the first battery pole segment 101 and the second battery pole segment 102 , and can be used to identify the connecting tape interval.

[0041] In step S1, in specific implementation, the flexible guide belt includes any one of white, light brown or silver-grey, or a combination of at least two of them.

[0042] In the present invention, in step S1, in specific implementation, the flexible guide belt 11 is a flexible belt-like object that can be bent arbitrarily, including but not limited to a diaphragm, a plastic film, a fiber film, a glass film, a metal film, that is, including any one of a diaphragm, a plastic film, a fiber film, a glass film and a metal film;

[0043] In specific implementation, the diaphragm includes but is not limited to porous organic membranes, non-woven membranes and inorganic composite membranes, that is, any one of porous organic membranes, non-woven membranes and inorganic composite membranes. The surface of the diaphragm can be single-sided or double-sided, coated or not coated with ceramic, glue and other substances.

[0044] In the present invention, in step S2, in specific implementation, the first battery pole segment 101 includes a first portion that is connected together (for example, integrally formed) and is wound around the first roller 1701 and a second portion that is wound around the second roller 1702;

[0045] The first part bypassing the first roller 1701 is in an inverted U shape as a whole, and the first roller 1701 is located in the inner side of the first part bypassing the first roller 1701;

[0046] The second portion bypassing the second roller 1702 is U-shaped as a whole, and the second roller 1702 is located at the inner side of the second portion bypassing the second roller 1702 .

[0047] In step S2, in a specific implementation, the second battery pole segment 102 includes a third portion that is connected together (for example, integrally formed) and is wound around the fourth roller 1704 and a fourth portion that is wound around the fifth roller 1705;

[0048] The third portion bypassing the fourth roller 1704 is U-shaped as a whole, and the fourth roller 1704 is located on the inner side of the third portion bypassing the fourth roller 1704 .

[0049] The fourth portion bypassing the fifth roller 1705 is in an inverted U shape as a whole, and the fifth roller 1705 is located in the inner side of the fourth portion bypassing the fifth roller 1705 .

[0050] In the present invention, it should be noted that, see Figure 2 As shown, the portion of the first battery pole segment 101 located on the left side of the first roller 1701 and the portion of the second battery pole segment 102 located on the right side of the fifth roller 1705 are both in the normal conveying process of the pole piece production equipment.

[0051] In the present invention, in step S3, in a specific implementation, the colors of the first tape 121 and the second tape 122 are different from the colors of the first battery pole segment 101 and the second battery pole segment 102 (the color of the pole piece is black or grayish black), that is, they are identifiable colors. For example, the identifiable colors include any one of red, green or blue, or a combination of at least two of them.

[0052] It should be noted that since the colors of the flexible connecting tape 11, the first adhesive tape 121 and the second adhesive tape 122 are obviously different from the colors of the first battery pole segment 101 and the second battery pole segment 102, a double insurance is formed, which can be used to reliably identify the connecting parts and the connecting intervals, and prevent the flexible connecting tape from being mistaken for the pole piece and the erroneous production operation.

[0053] In the present invention, in step S3, in specific implementation, a docking device is used to place the first connecting tape end 13 at the right end of the first battery pole segment 101 and the third connecting tape end 15 at the left end of the flexible connecting tape 11 opposite (i.e. aligned), and the fourth connecting tape end 16 at the right end of the flexible connecting tape 11 and the second connecting tape end 14 at the left end of the second battery pole segment 102 opposite, and cooperate to complete the bonding operation of the first adhesive tape 121 and the second adhesive tape 122;

[0054] See also Figure 3 As shown, the docking device includes a belt connection platform 1101;

[0055] A flexible tape reel receiving notch 1102 is provided in the tape connection platform 1101;

[0056] A screw rod 1103 is provided through the belt connection platform 1101;

[0057] The screw 1103 transversely penetrates through the middle of the flexible connecting belt reel receiving notch 1102;

[0058] One end of the screw rod 1103 is exposed outside the belt connection platform 1101 and is equipped with a suction cup 1104;

[0059] Suction cup 1104, used for adsorbing on existing battery pole piece production equipment;

[0060] The screw 1103 is located in the flexible guide belt reel receiving notch 1102, and is sleeved with a cylindrical flexible guide belt reel 1105;

[0061] The surface of the flexible connecting tape reel 1105 is used to place the first connecting tape end 13 at the right end of the first battery pole segment 101 and the third connecting tape end 15 at the left end of the flexible connecting tape 11 in close contact with each other so that the two are aligned, so that the staff can further use the first adhesive tape 121 to bond the first connecting tape end 13 at the right end of the first battery pole segment 101 and the third connecting tape end 15 at the left end of the flexible connecting tape 11 together, so that the bonding part between the first adhesive tape 121 and the flexible connecting tape 11 is flat (i.e., without wrinkles);

[0062] The surface of the flexible connecting tape reel 1105 is also used to place the fourth connecting tape end 16 at the right end of the flexible connecting tape 11 and the second connecting tape end 14 at the left end of the second battery pole segment 102 in close contact so that the two are aligned, allowing the staff to further use the second adhesive tape 122 to bond the fourth connecting tape end 16 at the right end of the flexible connecting tape 11 and the second connecting tape end 14 at the left end of the second battery pole segment 102 together, so that the bonding point between the second adhesive tape 122 and the flexible connecting tape 11 is flat (i.e., there is no wrinkle).

[0063] In a specific implementation, the screw rod 1103 is pivotally connected to the belt connection platform 1101 (ie, rotatably connected).

[0064] It should be noted that the flexible connecting tape reel 1105 serves as a lead-out reel of the flexible connecting tape. When connecting the tape, it is led out from the flexible connecting tape reel 1105 and then a section of the flexible connecting tape 11 is cut.

[0065] In a specific implementation, the screw 1103 is a retractable screw, including a wide screw segment and a narrow screw segment;

[0066] One end of the wide screw section is open;

[0067] One end of the narrow screw end is inserted into the hollow wide screw segment;

[0068] The other end of the wide screw section is fixedly connected to the suction cup 1104 .

[0069] The screw rod 1103 can be adjusted to a length inserted into the tape connection platform 1101. The flexible tape connection reel 1105 provided on the screw rod 1103 can align the flexible tape connection with the pole piece cutout to be connected, so as to facilitate tape connection.

[0070] In specific implementation, the belt connecting platform is connected to the screw rod, and its position can be adjusted along with the screw rod. The flexible connecting belt reel is in the middle part of the belt connecting platform, and a gap is left between the two to ensure that the reel can rotate.

[0071] In specific implementation, the two ends of the connecting belt platform and the screw rod can be connected respectively with a buckle 1106 (one end of the buckle is fixedly connected to the connecting belt platform, and the other end of the buckle has a limiting hole for passing the screw rod), which can be freely disassembled for loading and unloading the flexible connecting belt reel.

[0072] In a specific implementation, the flexible connecting belt reel is sleeved on a retractable screw rod and can roll freely along with the flexible connecting belt.

[0073] In order to more clearly understand the technical solution of the present invention, the technical solution of the present invention is described below through specific embodiments.

[0074] Example 1.

[0075] First, when the tape is broken or the lead tape is replaced during the battery manufacturing process, the first and second connecting tape ends of the first and second battery pole segments 101 and 102, as well as the third and fourth connecting tape ends of the flexible lead tape are cut neatly with a blade;

[0076] Then, take a certain length of single-sided ceramic diaphragm, for example, 1.5 m in length, and thread it through a roller (i.e., the third roller 1703), and place the first and third connecting ends opposite to each other, and the second and fourth connecting ends opposite to each other;

[0077] Next, the first and third tape ends are glued together with a piece of adhesive tape (ie, the first adhesive tape), and the second and fourth tape ends are glued together with an adhesive tape (ie, the second adhesive tape), thereby completing the tape splicing.

[0078] Figure 2 It is a schematic diagram of the tape connection state of Example 1.

[0079] The tape splicing method of Example 1 is a tape splicing method designed by the present invention, which is a tape splicing method that introduces a flexible splicing tape. Because the flexible splicing tape is flexible, no wrinkles will be formed after bonding, and no stress concentration points will be formed at the bonding position, thereby reducing the probability of the pole roll breaking again, improving the roller passing efficiency, and thus improving the success rate of tape splicing.

[0080] Comparative example 1.

[0081] First, when the tape is broken or the lead tape is changed during the battery manufacturing process, the first tape end and the second tape end are cut neatly with a blade;

[0082] Then, the first belt connecting end and the second belt connecting end are placed opposite to each other;

[0083] Next, the first tape end and the second tape end are directly adhered together with adhesive tape to complete the tape splicing.

[0084] The method of comparative example 1 is the conventional tape connection method. This bonding method has poor bonding effect, and the battery pole piece is prone to wrinkles at the bonding position. When the pole piece is stretched during the process, the wrinkles will form stress concentration points, which are easy to break again. Even if the broken ends of the two broken battery pole pieces are placed on the same horizontal plane or a certain platform during bonding, wrinkles will inevitably appear when the tape is manually attached. No matter how carefully the operation is done, wrinkles will exist.

[0085] To sum up, compared with the prior art, the method for connecting battery pole pieces provided by the present invention is scientifically designed. The present invention introduces a connecting method of a flexible connecting tape, and bonds a section of the flexible connecting tape to the corresponding fracture ends of the two disconnected battery pole pieces through adhesive tape. Because the flexible connecting tape is flexible, the flexible connecting tape will not form wrinkles after being bonded with the adhesive tape, and no stress concentration points will be formed at the bonding position. Therefore, the probability of the pole roll breaking again can be reduced, and the efficiency of conveying the pole piece over the roller can be improved, thereby improving the success rate of the connection, which has great practical significance.

[0086] For the present invention, when the tape is broken or the lead tape is changed during the battery manufacturing process, the broken ends of the two broken battery pole pieces (i.e., the first connecting tape end and the second connecting tape end) are not directly glued with adhesive tape, but a flexible connecting tape is introduced, and its two ends are defined as the third connecting tape end and the fourth connecting tape end, respectively. The first connecting tape end of the flexible connecting tape and the broken end of a battery pole piece (i.e., the third connecting tape end) are glued together with adhesive tape, and the second connecting tape end of the flexible connecting tape and the broken end of another battery pole piece (i.e., the fourth connecting tape end) are glued together with adhesive tape to complete the tape splicing. The present invention uses a flexible connecting tape, which effectively improves the success rate of tape splicing.

[0087] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for connecting a battery pole piece, characterized in that: The following steps are involved: Step S1, for a first battery electrode segment (101) and a second battery electrode segment (102) that need to be connected, the fracture at the right end of the first battery electrode segment (101) and the fracture at the left end of the second battery electrode segment (102) are defined as a first connecting end (13) and a second connecting end (14), and the two side ends of a section of flexible connecting tape (11) are defined as a third connecting end (15) and a fourth connecting end (16), and then the first connecting end (13) and the second connecting end (14) as well as the third connecting end (15) and the fourth connecting end (16) are cut neatly with a blade; Step S2, the left and right ends of the first battery pole segment (101) are respectively passed around the first roller (1701) and the second roller (1702) which are arranged vertically, and the right end and the left end of the second battery pole segment (102) are respectively passed around the fifth roller (1705) and the fourth roller (1704) which are arranged vertically, and the flexible connecting belt (11) is passed around the third roller (1703); The first roller (1701), the second roller (1702), the third roller (1703), the fifth roller (1705) and the fourth roller (1704) are all rollers that rotate clockwise or counterclockwise, and rotate in the same direction; The first roller (1701), the third roller (1703) and the fifth roller (1705) are sequentially spaced from left to right; The second roller (1702) is located directly below the gap between the first roller (1701) and the third roller (1703); The fourth roller (1704) is located directly below the gap between the third roller (1703) and the fifth roller (1705); The flexible connecting belt (11) passing around the third roller (1703) is in an inverted U shape as a whole, and the third roller (1703) is located on the inner side of the flexible connecting belt (11); Step S3, placing the first connecting end (13) at the right end of the first battery electrode segment (101) and the third connecting end (15) at the left end of the flexible connecting tape (11) opposite to each other, and placing the fourth connecting end (16) at the right end of the flexible connecting tape (11) and the second connecting end (14) at the left end of the second battery electrode segment (102) opposite to each other, and then using the first adhesive tape (121) to connect the first connecting end (13) at the right end of the first battery electrode segment (101) and the flexible connecting tape (11) to each other. The third connecting tape end (15) at the left end of the tape (11) is bonded together so that the bonding point between the first adhesive tape (121) and the flexible connecting tape (11) is flat, and the fourth connecting tape end (16) at the right end of the flexible connecting tape (11) and the second connecting tape end (14) at the left end of the second battery electrode segment (102) are bonded together with the second adhesive tape (122) so that the bonding point between the second adhesive tape (122) and the flexible connecting tape (11) is flat, thereby completing the tape connection operation.

2. The method for connecting a battery pole piece according to claim 1, characterized in that: The first battery pole segment (101) and the second battery pole segment (102) to be connected specifically include: two battery pole segments formed due to a battery pole segment breakage problem during the battery manufacturing process; Or, specifically, it includes a section of battery electrode that is about to be used up and a new section of battery electrode that is about to be connected during the battery manufacturing process.

3. The method for connecting a battery pole piece according to claim 1, characterized in that: The width of the flexible connecting belt (11) is in the range of 0.5-1.2 times the width of the first battery electrode segment (101) or the second battery electrode segment (102); The first cell pole segment (101) and the second cell pole segment (102) have the same width.

4. The method for connecting a battery pole piece according to claim 1, characterized in that: The thickness of the flexible connecting tape (11) is in the range of 1 to 100 microns.

5. The method for connecting a battery pole piece according to claim 1, characterized in that: The flexible connecting belt (11) is a flexible belt-shaped object, including any one of a diaphragm, a plastic film, a fiber film, a glass film and a metal film.

6. The method for connecting a battery pole piece according to claim 5, characterized in that: The separator includes any one of a porous organic membrane, a non-woven fabric separator and an inorganic composite membrane.

7. The method for connecting a battery pole piece according to claim 1, characterized in that: In step S2, the first battery pole segment (101) includes a first portion connected together and wound around a first roller (1701) and a second portion wound around a second roller (1702); The first part bypassing the first roller (1701) is in an inverted U shape as a whole, and the first roller (1701) is located in the inner side of the first part bypassing the first roller (1701); The second portion that passes around the second roller (1702) is U-shaped as a whole, and the second roller (1702) is located on the inner side of the second portion that passes around the second roller (1702).

8. The method for connecting a battery pole piece according to claim 1, characterized in that: In step S2, the second battery pole segment (102) includes a third portion that is connected together and passes around a fourth roller (1704) and a fourth portion that passes around a fifth roller (1705); The third portion bypassing the fourth roller (1704) is in a U-shape as a whole, and the fourth roller (1704) is located in the inner side of the third portion bypassing the fourth roller (1704); The fourth portion bypassing the fifth roller (1705) is in an inverted U-shape as a whole, and the fifth roller (1705) is located in the inner side of the fourth portion bypassing the fifth roller (1705).

9. The method for connecting a battery pole piece according to any one of claims 1 to 8, characterized in that: In step S3, a first connecting tape end (13) at the right end of the first battery electrode segment (101) and a third connecting tape end (15) at the left end of the flexible connecting tape (11) are placed opposite (i.e. aligned) by a docking device, and a fourth connecting tape end (16) at the right end of the flexible connecting tape (11) and a second connecting tape end (14) at the left end of the second battery electrode segment (102) are placed opposite, and the first adhesive tape (121) and the second adhesive tape (122) are bonded together; The docking device comprises a belt connection platform (1101); A flexible connecting belt reel receiving notch (1102) is provided in the connecting belt platform (1101); A screw rod (1103) is provided through the belt connection platform (1101); The screw (1103) passes transversely through the middle of the flexible connecting belt reel receiving notch (1102); One end of the screw rod (1103) is exposed outside the belt connection platform (1101) and is provided with a suction cup (1104); A suction cup (1104) is used to be attached to an existing battery electrode production device; The screw rod (1103) is located in the flexible connecting belt reel accommodating notch (1102), and is sleeved with a cylindrical flexible connecting belt reel (1105).

10. The method for connecting a battery pole piece according to claim 9, characterized in that: The surface of the flexible connecting tape reel (1105) is used to place the first connecting tape end (13) at the right end of the first battery pole segment (101) and the third connecting tape end (15) at the left end of the flexible connecting tape (11) in close contact with each other so that the two are aligned, so that the staff can further use the first adhesive tape (121) to bond the first connecting tape end (13) at the right end of the first battery pole segment (101) and the third connecting tape end (15) at the left end of the flexible connecting tape (11) together, so that the bonding portion between the first adhesive tape (121) and the flexible connecting tape (11) is flat; The surface of the flexible connecting tape reel (1105) is also used to place the fourth connecting tape end (16) at the right end of the flexible connecting tape (11) and the second connecting tape end (14) at the left end of the second battery pole segment (102) in close contact, so that the two are aligned, so that the staff can further use the second adhesive tape (122) to bond the fourth connecting tape end (16) at the right end of the flexible connecting tape (11) and the second connecting tape end (14) at the left end of the second battery pole segment (102) together, so that the bonding point between the second adhesive tape (122) and the flexible connecting tape (11) is flat.

Images