CN-121985600-A - Battery cell and processing equipment

CN121985600ACN 121985600 ACN121985600 ACN 121985600ACN-121985600-A

Abstract

The utility model provides a battery unit and processing equipment, relate to the battery field, battery unit includes a plurality of back contact battery strings and the subassembly that converges, a plurality of back contact battery strings are arranged in first direction, every back contact battery string has the battery piece and follows the welding strip that first direction extends, the welding strip has main part section and linkage segment, the main part section sets up on the battery piece, the linkage segment is connected with the main part section, the subassembly that converges includes first subassembly that converges and second subassembly that converges, first subassembly that converges is connected with two back contact battery strings that set up adjacently, in the thickness direction of battery unit, the linkage segment of two adjacent back contact battery strings all is connected at the top surface of first subassembly that converges, the battery piece all is located the bottom surface of first subassembly that converges, the second is converged the subassembly and is located the back contact battery string at the edge and is connected, the projection of second subassembly on the thickness direction of battery unit is located the scope of battery piece. Through the technical scheme, the yield of the battery is guaranteed.

Inventors

Shen lv
DAI JIANFANG
ZHANG KANGPING
Shao Feiyang
YUAN BEIHAI
LIU PEIPEI
YAN JIASHAN
LIU YONG
SONG DENGYUAN

Assignees

一道新能源科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260331

Claims (10)

1. A battery cell, comprising: A plurality of back contact battery strings arranged in a first direction, each back contact battery string having a battery plate and a solder strip extending along the first direction, the solder strip having a main body section and a connection section, the main body section being disposed on the battery plate, the connection section being connected with the main body section, and The converging assembly comprises a first converging assembly and a second converging assembly, Wherein the first confluence component is connected with two adjacent back contact battery strings, the connecting sections of the two adjacent back contact battery strings are connected with the top surface of the first confluence component in the thickness direction of the battery unit, the battery pieces are positioned on the bottom surface of the first confluence component, The second confluence component is connected with the back contact battery string positioned at the edge, and the projection of the second confluence component in the thickness direction of the battery unit is positioned in the range of the battery piece.
2. The battery cell according to claim 1, wherein the bus bar assembly includes bus bars and a separator bar that are stacked in a thickness direction of the battery cell, the bus bars being connected to the connection sections, the separator bar being disposed between the battery cells and the bus bars.
3. The battery cell according to claim 1, wherein a spacing L1 between adjacent two of the battery pieces in the first direction satisfies 0.5mm +.l1 +.8 mm.
4. A processing apparatus for producing the battery cell of any one of claims 1 to 3, the bus bar assembly including a bus bar and a separator bar stacked in a thickness direction of the battery cell, the processing apparatus comprising: The first welding device comprises a first welding platform and a first welding fixture, wherein the first welding platform is used for welding the bus bar and the isolation bar, and the first welding fixture is used for fixing the bus bar and the isolation bar; A second welding device including a second welding platform for welding the bus bar and the connection section and a second welding jig for fixing the bus bar assembly and the connection section, and And the third welding fixture is used for fixing the back contact battery string.
5. The processing apparatus of claim 4, wherein the first welding platform comprises: a first welding block, on which the bus assembly is disposed; the first platform body, first welding piece sets up on the first platform body, first embedded first induction coil that is located the both sides of first welding piece of this first platform body, first induction coil is used for heating first welding piece, and The fixed block is arranged at the end part of the first platform body and is provided with a first adsorption hole, and positioning pins used for being abutted to the edge of the converging component are arranged on two sides of the first adsorption hole.
6. The machining apparatus of claim 4, wherein the first welding jig comprises: The end part of the first adsorption rod is provided with a first sucker; The end part of the first compression bar is provided with a compression plate, and the compression plate is provided with an avoidance hole for avoiding the first adsorption bar; a first bracket connected with the first adsorption rod, and A second bracket connected with the first compression bar through a first elastic piece, wherein the first elastic piece is configured to be compressed when the pressing plate is abutted with the confluence component, Wherein, the first support and the second support are both movable in a direction perpendicular to the bus bar assembly.
7. The processing apparatus of claim 4, wherein the second welding platform comprises: a second welding block for welding the bus bar and the connection section, and The second platform body is provided with a second adsorption hole for adsorbing the converging component, the second welding block is arranged on the second platform body, second induction coils positioned on two sides of the second welding block are embedded in the second platform body, and the second induction coils are used for heating the second welding block.
8. The machining apparatus of claim 4, wherein the second welding jig comprises: the end part of the second adsorption rod is provided with a second sucker; the end part of the second compression bar is provided with a pressure head; A third bracket connected with the second adsorption rod, and A fourth bracket connected to the second compression bar through a second elastic member configured to compress when the pressure head abuts the confluence assembly, Wherein the third bracket and the fourth bracket are each movable in a direction perpendicular to the bus bar assembly.
9. The processing apparatus of claim 8, wherein in the first direction, a length L2 of the ram and an extension length L3 of the manifold assembly satisfy L2-L3>4mm.
10. The processing apparatus according to claim 4, wherein the processing apparatus comprises a bending device for bending the connection section such that an angle a between the connection section and the battery piece satisfies 30 ° -a 60 °.

Description

Battery cell and processing equipment Technical Field The present disclosure relates to the field of batteries, and in particular, to a battery cell and a processing apparatus. Background The back contact battery piece is a battery piece which is formed by placing metal contacts of positive and negative poles of the battery piece on the back of the battery piece, and is widely used in the field of photovoltaics. The back contact battery pieces may be connected to each other using a solder ribbon to form a back contact battery string, and the edges of the back contact battery string may have a bus bar assembly welded to the solder ribbon to form a lead-out terminal of the positive or negative electrode of the back contact battery string. In the related art, the welding effect between the welding strip below the converging component and the converging component can not be detected, the reliability of the converging component and the welding strip after welding can not be ensured, and the yield of products is reduced. Meanwhile, in order to avoid occupation of the bus bar assembly to the space, if the back contact battery strings are not connected with other back contact battery strings through the bus bar assembly, the bus bar assembly needs to be folded and placed on the battery piece, and the battery strings are formed with double-layer welding strips in the area of the bus bar assembly. In the process of turning over the collection flow component and in the battery piece of the area of collection flow component, the hidden crack easily has reduced the yields of product. Disclosure of Invention It is an object of the present disclosure to provide a battery cell and a processing apparatus to at least partially solve the problems existing in the related art. In order to achieve the above object, the present disclosure provides a battery cell including: A plurality of back contact battery strings arranged in a first direction, each back contact battery string having a battery plate and a solder strip extending along the first direction, the solder strip having a main body section and a connection section, the main body section being disposed on the battery plate, the connection section being connected with the main body section, and The converging assembly comprises a first converging assembly and a second converging assembly, Wherein the first confluence component is connected with two adjacent back contact battery strings, the connecting sections of the two adjacent back contact battery strings are connected with the top surface of the first confluence component in the thickness direction of the battery unit, the battery pieces are positioned on the bottom surface of the first confluence component, The second confluence component is connected with the back contact battery string positioned at the edge, and the projection of the second confluence component in the thickness direction of the battery unit is positioned in the range of the battery piece. In some possible embodiments, the bus bar assembly includes bus bars and a separator bar stacked in a thickness direction of the battery cells, the bus bars being connected with the connection sections, the separator bar being disposed between the battery cells and the bus bars. In some possible embodiments, the spacing L1 between two adjacent battery pieces in the first direction is 0.5 mm≤L1≤8 mm. In another aspect, the present disclosure also provides a processing apparatus for preparing the battery cell of any one of the above, the bus bar assembly including bus bars and separator bars stacked in a thickness direction of the battery cell, the processing apparatus comprising: The first welding device comprises a first welding platform and a first welding fixture, wherein the first welding platform is used for welding the bus bar and the isolation bar, and the first welding fixture is used for fixing the bus bar and the isolation bar; A second welding device including a second welding platform for welding the bus bar and the connection section and a second welding jig for fixing the bus bar assembly and the connection section, and And the third welding fixture is used for fixing the back contact battery string. In some possible embodiments, the first welding platform comprises: a first welding block, on which the bus assembly is disposed; the first platform body, first welding piece sets up on the first platform body, first embedded first induction coil that is located the both sides of first welding piece of this first platform body, first induction coil is used for heating first welding piece, and The fixed block is arranged at the end part of the first platform body and is provided with a first adsorption hole, and positioning pins used for being abutted to the edge of the converging component are arranged on two sides of the first adsorption hole. In some possible embodiments, the first welding fixture comprises: The end part of the first adsorption rod is