A battery production line

Abstract

The application relates to the technical field of battery manufacturing, and discloses a battery production line which comprises a bending and pressure maintaining device; the bending and pressure maintaining device comprises a supporting seat, a rotating pressure block rotationally connected with the supporting seat, and a limiting block installed on the supporting seat to limit the rotating pressure block; the supporting seat is provided with a positioning groove for supporting a battery cell group, and the side wall of the positioning groove close to the rotating pressure block is open; the rotating pressure block is provided with a limiting groove for accommodating a circuit board assembly; the rotating pressure block is used for driving the circuit board assembly to rotate, so that the connecting sheets respectively connected with the circuit board assembly and the battery cell group are bent into U shapes, and the circuit board assembly is pressed on one end of the battery cell group in the positioning groove; when the circuit board assembly is pressed on one end of the battery cell group, the rotating pressure block abuts against the limiting block. The battery production line can better improve the production quality of the rubber shell type battery and is favorable for reducing the labor intensity of workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery manufacturing, in particular to a battery production line. BACKGROUND

[0002] With the development of the new energy industry, especially the rapid development of the battery manufacturing field, the size precision of the battery is increasingly strict.

[0003] The processing size precision of the gel shell battery, as one of the batteries, is directly related to the overall performance and safety. However, the gel shell battery includes a circuit board assembly, a battery cell group, and a connecting piece, the two ends of the connecting piece are connected to the circuit board assembly and the battery cell group, respectively, and the connecting piece needs to be manually bent by workers, so that the circuit board assembly is as close as possible to the battery cell group, so that the volume of the gel shell battery can be smaller. The existing bending method is manual bending of the connecting piece, which is labor-intensive and not conducive to improving the bending quality, and is prone to produce defective products.

[0004] Therefore, it is necessary to design a battery production line to better improve the production quality of the gel shell battery and reduce the labor intensity of workers.

[0005] The above information is given as background information only to assist with understanding the present disclosure and does not establish or acknowledge any of the above as prior art to the present disclosure. SUMMARY

[0006] The present application provides a battery production line to better improve the production quality of the gel shell battery and reduce the labor intensity of workers.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0008] A battery production line, comprising a bending and pressure maintaining device;

[0009] The bending and pressure maintaining device comprises a supporting seat, a rotating pressure block rotatably connected with the supporting seat, and a limiting block installed on the supporting seat to limit the rotating pressure block; the supporting seat is provided with a positioning groove for supporting the battery cell group, and the side wall of the positioning groove close to the rotating pressure block is provided in an open manner;

[0010] The rotating pressure block is provided with a limiting groove for accommodating the circuit board assembly; the rotating pressure block is used to drive the circuit board assembly to rotate, so that the connecting piece connected to the two ends of the circuit board assembly and the battery cell group is bent into a U shape, and the circuit board assembly is pressed on one end of the battery cell group in the positioning groove; when the circuit board assembly is pressed on one end of the battery cell group, the rotating pressure block abuts against the limiting block.

[0011] Optionally, an adjusting block is mounted on the support base, and a rotating hole is arranged on the adjusting block, and a bearing is mounted in the rotating hole;

[0012] A rotating shaft is arranged on the rotating pressing block, the rotating shaft is inserted into the inner hole of the bearing, and the rotating shaft is perpendicular to the extension direction of the positioning groove.

[0013] Optionally, the mounting positions of the adjusting block and the limiting block are adjustable along the extension direction of the positioning groove.

[0014] Optionally, the battery production line further comprises a sliding supporting plate and an elastic assembly.

[0015] The sliding supporting plate is slidably mounted in the positioning groove to support the bottom end of the battery cell group, and the elastic assembly is mounted between the sliding supporting plate and the groove wall of the positioning groove away from the rotating pressing block.

[0016] Optionally, the support base is provided with a blocking surface, and the rotating pressing block has an extension foot.

[0017] When the rotating pressing block rotates to a set loading angle, the extension foot abuts against the blocking surface, and the limiting groove opening faces upward to support the circuit board assembly.

[0018] Optionally, a support base is mounted at the bottom of the support base, and the top of the support base is fixedly connected with the support base.

[0019] A plurality of suction cups are arranged at the bottom of the support base.

[0020] Optionally, the battery production line further comprises a circuit board welding device located upstream of the bending and pressure maintaining device, and the circuit board welding device comprises a positioning welding jig and an automatic welding module.

[0021] The positioning welding jig comprises a jig body and a pressing plate, the jig body is provided with a first positioning groove for positioning the battery cell group and a second positioning groove for positioning the circuit board assembly, and the pressing plate is used for pressing the battery cell group in the first positioning groove, and the first positioning groove is communicated with the second positioning groove through a connecting groove.

[0022] The connecting piece has a connecting body part for connecting the battery cell group and an extension connecting part which is overlapped on the welding part of the circuit board assembly through the connecting groove.

[0023] Optionally, the shape of the first positioning groove is matched with the shape of the battery cell group, and the shape of the second positioning groove is matched with the shape of the circuit board assembly.

[0024] Optionally, the automatic welding module is a laser welding device.

[0025] Optionally, the battery production line further comprises a cell group welding forming device for welding the connecting sheet and the cell group;

[0026] The cell group welding forming device, the circuit board welding device and the bending pressure maintaining device are sequentially arranged along a process direction.

[0027] Optionally, the cell group welding forming device comprises a spot welding jig and a welding manipulator.

[0028] The spot welding jig comprises a first bottom plate, a second top plate, and a width fixing plate connected to the first bottom plate and the second top plate at two ends.

[0029] The first bottom plate is provided with a first positioning slot for inserting a cell, and the second top plate is provided with a second positioning slot corresponding to the first positioning slot.

[0030] The bottom wall of the second positioning slot is provided with a limiting placement slot for accommodating the connecting sheet, and the limiting placement slot is connected with a through slot for accommodating an extension connecting part of the connecting sheet.

[0031] The first bottom plate is provided with a first welding through hole corresponding to the first positioning slot, and the second top plate is provided with a second welding through hole corresponding to the second positioning slot.

[0032] Optionally, the second top plate is provided with an identification slot, and the welding manipulator is provided with a visual detection device for identifying the identification slot.

[0033] The welding manipulator identifies different types of electric welding jigs based on the shape of the identification slot to perform different electric welding processes.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The battery production line provided by the present application is provided with a bending pressure maintaining device, which can carry and position the circuit board assembly through the limiting grooves on the rotating pressure block, carry and position the cell group through the positioning slots on the supporting seat, then make the rotating pressure block rotate to drive the circuit board assembly to rotate relative to the cell group, and make the connecting sheet bend to form a U shape under stress during the rotation of the rotating pressure block, so as to bend the connecting sheet. In addition, the limiting block limits the rotating pressure block, which can avoid the excessive pressure of the circuit board assembly on the top end of the cell to produce defective products. The battery production line in the embodiment can effectively improve the bending quality of the gel shell type battery through ingenious structural design, make the bending more easy to operate and more accurately control the bending size, and effectively improve the bending quality.

[0036] The present application has other characteristics and advantages that will be apparent from the drawings and detailed description incorporated herein, or will be described in detail in the drawings and detailed description incorporated herein, which are collectively used to explain the specific principles of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 is a structural schematic diagram of the bending pressure maintaining device provided by the embodiment of the present application when pressure maintaining;

[0039] Figure 2 is a three-dimensional structural schematic diagram of the bending pressure maintaining device provided by the embodiment of the present application;

[0040] Figure 3 is a top view schematic diagram of the bending pressure maintaining device provided by the embodiment of the present application;

[0041] Figure 4 is a three-dimensional structural schematic diagram of the bending pressure maintaining device provided by the embodiment of the present application from another viewing direction;

[0042] Figure 5 is a side view schematic diagram of the bending pressure maintaining device provided by the embodiment of the present application when pressure maintaining;

[0043] Figure 6 is a side view schematic diagram of the bending pressure maintaining device provided by the embodiment of the present application before bending;

[0044] Figure 7 is a three-dimensional structural schematic diagram of the positioning welding jig provided by the embodiment of the present application;

[0045] Figure 8 is an exploded schematic diagram of the positioning welding jig provided by the embodiment of the present application;

[0046] Figure 9 is Figure 8 is an enlarged schematic diagram of the positioning welding jig in position A in the middle;

[0047] Figure 10 is a three-dimensional structural schematic diagram of the spot welding jig provided by the embodiment of the present application;

[0048] Figure 11 is a top view schematic diagram of the spot welding jig provided by the embodiment of the present application;

[0049] Figure 12 is Figure 11 A-A cross-sectional structure diagram of the spot welding jig in

[0050] Fig. 1 is a bending pressure maintaining device; 11 is a supporting seat; 1101 is a positioning groove; 1102 is a blocking surface; 12 is a rotating pressing block; 1201 is a limiting groove; 1202 is a rotating shaft; 1203 is an extension foot; 13 is a limiting block; 14 is an adjusting block; 15 is a sliding supporting plate; 16 is an elastic assembly; 17 is a supporting base; 18 is a suction cup; 2 is a positioning welding jig; 201 is a welding part; 2001 is a connecting groove; 21 is a first positioning groove; 22 is a second positioning groove; 23 is a jig body; 24 is a pressing plate; 3 is a spot welding jig; 31 is a first bottom plate; 311 is a first positioning slot; 32 is a second top plate; 321 is a second positioning slot; 322 is a through groove; 33 is a width limiting plate; 301 is a connecting body part; 302 is an extension connecting part; 3001 is an identification groove; 3111 is a first welding through hole; 3211 is a second welding through hole; 100 is an electric core group; 200 is a circuit board assembly; 300 is a connecting sheet. DETAILED DESCRIPTION

[0051] To make the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects achieved in the present application clear, the following will be described in detail in combination with the specific embodiments listed and the accompanying drawings. The embodiments described in this paper are only used to more clearly illustrate the technical solutions of the present application, and therefore cannot limit the protection scope of the present application.

[0052] In this paper, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0053] Unless otherwise defined, the meaning of the technical terms used in this paper is the same as that generally understood by those skilled in the art to which the present application belongs; the use of related terms in this paper is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0054] In the description of the present application, the phrase "and / or" is a description of a logical relationship between objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " herein generally represents that the associated objects before and after are an "or" logical relationship.

[0055] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary, or order relationship between the entities or operations.

[0056] In the present application, the phrases "include", "contain", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion, and these phrases do not exclude the presence of other elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0057] As the same understanding as in the "Guidelines for Examination", in the present application, the expressions such as "greater than", "less than", "exceed" are understood as not including the number; the expressions such as "above", "below", "within" are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.

[0058] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0059] Unless otherwise clearly indicated or implied to the contrary by context, as used herein the terms "mount", "connected", "connecting", "fixed", "set", and the like are to be construed in a broad sense, and can encompass fixed or detachable connections, or an integral setting; mechanical or electrical connections, or communication connections; direct or indirect connections through an intermediate medium; or a relationship of intercommunication or interaction between two elements. Those skilled in the art will understand the specific meaning of the above terms in the embodiments of the present application according to the specific circumstances.

[0060] In view of the defects of the existing manual assembly of the gel shell battery, the applicant, based on years of rich practical experience and professional knowledge in designing and manufacturing such products, actively researches and innovates to create a technology that can solve the defects in the prior art, making the battery production line more practical. After continuous research, design, and repeated trial and improvement of samples, the present invention is finally created.

[0061] Please refer to Figures 1 to 12 The embodiment of the present application provides a battery production line, which comprises a bending and pressure maintaining device 1; the specific structure of the bending and pressure maintaining device 1 is described in Figures 1 to 6 .

[0062] The bending and pressure maintaining device 1 comprises a supporting seat 11, a rotating pressing block 12 rotatably connected with the supporting seat 11, and a limiting block 13 installed on the supporting seat 11 to limit the rotating pressing block 12; the supporting seat 11 is provided with a positioning groove 1101 for supporting the battery cell group 100, and the positioning groove 1101 can accommodate and position the battery cell group 100; the side wall of the positioning groove 1101 close to the rotating pressing block 12 is open, and the side wall of the positioning groove 1101 close to the rotating pressing block 12 is open, so that the rotating pressing block 12 can press the circuit board assembly 200 towards the battery cell group 100 from the open part. It should be noted that the workpiece to be bent is the assembly of the battery cell group 100, the circuit board assembly 200 and the connecting piece 300, and the connecting piece 300 needs to be bent to make the overall volume smaller.

[0063] The rotating pressing block 12 is provided with a limiting groove 1201 for accommodating the circuit board assembly 200, and the limiting groove 1201 can accommodate and position the circuit board assembly 200; the rotating pressing block 12 is used to drive the circuit board assembly 200 to rotate, so that the connecting piece 300 connected to the circuit board assembly 200 and the battery cell group 100 at both ends is bent into a U shape, and the circuit board assembly 200 is pressed on one end of the battery cell group 100 in the positioning groove 1101; when the circuit board assembly 200 is pressed on one end of the battery cell group 100, the rotating pressing block 12 abuts against the limiting block 13.

[0064] The actual bending process is as follows:

[0065] ① Put the workpiece to be bent, that is, position the battery cell group 100 in the positioning groove 1101, position the circuit board assembly 200 in the limiting groove 1201, and at this time, the connecting sheet 300 is connected between the battery cell group 100 and the circuit board assembly 200, wherein, Figure 2 The position of the bent connecting sheet 300 is particularly reserved to facilitate understanding of the bending step;

[0066] ② Rotate the rotating pressing block 12 to drive the circuit board assembly 200 to rotate relative to the battery cell group 100, so that the circuit board assembly 200 is pressed to the battery cell group 100 at the open end of the positioning groove 1101;

[0067] ③ When the rotating pressing block 12 abuts against the limiting block 13, at this time, the position between the circuit board assembly 200 and the battery cell group 100 is relatively fixed, and the circuit board assembly 200 is attached to the end of the battery cell group 100; the rotating pressing block 12 is kept for a certain period of time, so that the circuit board assembly 200 can maintain the state of being attached to the end of the battery cell group 100, and the pressure maintaining is completed;

[0068] ④ Reverse rotate the rotating pressing block 12 to take out the workpiece after bending and pressure maintaining, and start processing another workpiece to be bent.

[0069] In the above process, through the bending and pressure maintaining device 1, the size consistency of the workpiece to be bent after each bending is improved, and the setting of the bending and pressure maintaining device 1 can make the operation of workers more standardized and convenient, and avoid the occurrence of a twisted structure like a twisted dough in the manual bending process of the connecting sheet 300. It should be noted that the limiting block 13 is provided, which can make the rotating pressing block 12 rotate to the appropriate angle each time, and can effectively avoid the pressure of the circuit board assembly 200 on the rotating pressing block 12 on the battery cell group 100 being too large, thereby comprehensively improving the bending quality and yield of the workpiece to be bent.

[0070] Preferably, the connecting sheet 300 is thin in the middle and thick at both ends, so that it can be bent to form a U-shaped structure more easily.

[0071] Optionally, the supporting seat 11 is provided with an adjusting block 14, the adjusting block 14 is provided with a rotating hole, and a bearing is installed in the rotating hole; the rotating pressing block 12 is connected with a rotating shaft 1202 for rotating connection with the bearing, the rotating shaft 1202 is inserted into the inner hole of the bearing, and the rotating shaft 1202 is perpendicular to the extension direction of the positioning groove 1101.

[0072] Specifically, the bearing and the rotating shaft 1202 are arranged, so that the friction can be reduced, the rotating stability and the rotating precision of the rotating shaft 1202 are improved, and the bending yield is improved. The rotating shaft 1202 is perpendicular to the extending direction of the positioning groove 1101, and the circuit board assembly 200 can simultaneously press the end portions of the plurality of single battery cells. It should be noted that the battery cell group includes the plurality of single battery cells.

[0073] Preferably, the mounting positions of the adjusting block 14 and the limiting block 13 are adjustable along the extending direction of the positioning groove 1101, so that the positions of the adjusting block 14 and the limiting block 13 can be adjusted to adapt to the bending requirement between the battery cell group 100 and the circuit board assembly 200 with different sizes, and the application range is improved.

[0074] Optionally, the battery production line further includes a sliding support plate 15 and an elastic assembly 16. The sliding support plate 15 is slidably arranged in the positioning groove 1101 to support the bottom end of the battery cell group 100, and the elastic assembly 16 is arranged between the sliding support plate 15 and the groove wall of the positioning groove 1101 away from the rotating pressing block 12.

[0075] Specifically, when the battery cell group 100 is pressed by the circuit board assembly 200, the sliding support plate 15 can slide away from the circuit board assembly 200 to avoid that the circuit board assembly 200 generates too large impact force on the battery cell group 100, and the possibility of collision and damage of the battery cell group 100 and the circuit board assembly 200 is reduced.

[0076] Optionally, the supporting seat 11 is provided with a blocking surface 1102, and the rotating pressing block 12 is provided with an extending foot 1203. When the rotating pressing block 12 rotates to a set loading angle, the extending foot 1203 abuts against the blocking surface 1102, and the limiting recess 1201 has an upward opening to support the circuit board assembly 200. Specifically, when the rotating pressing block 12 abuts against the blocking surface 1102, the limiting recess 1201 can be more conveniently put into and support the circuit board assembly 200, that is, the circuit board assembly 200 can be more easily put in, and the worker or the feeding manipulator can more easily and accurately put in the circuit board assembly 200.

[0077] Optionally, the bottom of the supporting seat 11 is provided with a supporting base 17, and the top of the supporting base 17 is fixedly connected with the supporting seat 11. The bottom of the supporting base 17 is provided with a plurality of suction cups 18. The supporting base 17 supports the supporting seat 11 and raises the position of the supporting seat 11, so that the worker can conveniently operate. In addition, the suction cups 18 adsorb the supporting base 17 to the supporting table, so that the fixing stability of the supporting base 17 is improved, and the supporting base 17 is prevented from shaking or toppling.

[0078] Optionally, the battery production line further comprises a circuit board welding device located upstream of the bending and pressure maintaining device 1, the circuit board welding device comprising a positioning and welding jig 2 and an automatic welding module; the positioning and welding jig 2 comprises a jig body 23 and a pressing plate 24; the jig body 23 is provided with a first positioning groove 21 for positioning the battery cell group 100 and a second positioning groove 22 for positioning the circuit board assembly 200, and the pressing plate 24 is used to press the battery cell group in the first positioning groove 21, and the first positioning groove 21 is communicated with the second positioning groove 22 through a connecting groove 2001; the connecting piece 300 has a connecting body part 301 for connecting the battery cell group 100 and an extended connecting part 302 which is lapped on the welding part 201 of the circuit board assembly 200 through the connecting groove 2001. The connecting body part 301 is welded to the end of the battery cell group 100, and the extended connecting part 302 is welded to the welding part 201 of the circuit board assembly 200. Figure 9 To weld the extended connecting part 302 to the welding part 201, the first positioning groove 21 precisely positions the battery cell group 100, and the second positioning groove 22 precisely positions the circuit board assembly 200, which improves the precision of positioning the battery cell group 100 and the circuit board assembly 200, effectively improves the consistency of the connecting piece 300 welded to the circuit board assembly 200, and is beneficial to improving the production yield.

[0079] Optionally, the shape of the first positioning groove 21 is matched with the shape of the battery cell group 100, and the shape of the second positioning groove 22 is matched with the shape of the circuit board assembly 200, so that the battery cell group 100 and the circuit board assembly 200 can be better positioned.

[0080] In this embodiment, the automatic welding module is a laser welding device.

[0081] Optionally, the battery production line further comprises a welding forming device for welding the connecting piece 300 and the battery cell group 100; the battery cell group welding forming device, the circuit board welding device and the bending and pressure maintaining device 1 are sequentially arranged along the process direction. Specifically, the battery cell group welding forming device welds a plurality of single battery cells and the connecting piece 300, and the circuit board welding device realizes the welding connection of the circuit board assembly 200 and the connecting piece 300, so that the combination of the battery cell group 100, the circuit board assembly 200 and the connecting piece 300 forms a bending workpiece, and then the bending and pressure maintaining device 1 bends and forms the bending workpiece.

[0082] Optionally, the battery cell group welding forming device comprises a spot welding jig 3 and a welding manipulator; the spot welding jig 3 comprises a first bottom plate 31, a second top plate 32, and a fixed-width plate 33 connected to the first bottom plate 31 and the second top plate 32 at both ends; the fixed-width plate 33 actually defines the position of the battery cell group 100. The first bottom plate 31 is provided with a first positioning slot 311 for inserting a battery cell, and the second top plate 32 is provided with a second positioning slot 321 corresponding to the first positioning slot 311; the bottom wall of the second positioning slot 321 is provided with a limiting placement slot for accommodating the connecting sheet 300, and the limiting placement slot is connected with a through slot 322 for accommodating the extension connecting part 302 of the connecting sheet 300; the first bottom plate 31 is provided with a first welding through hole 3111 corresponding to the first positioning slot 311, and the second top plate 32 is provided with a second welding through hole 3211 corresponding to the second positioning slot 321.

[0083] In the embodiment, by providing the limiting placement slot and the through slot 322, the relative position between the battery cell group 100 and the connecting sheet 300 can be well guaranteed, so that the connecting sheet 300 can be accurately spot welded at the end of the battery cell group 100.

[0084] Optionally, the second top plate 32 is provided with an identification slot 3001, and the welding manipulator is provided with a visual detection device for identifying the identification slot 3001; the welding manipulator identifies different types of welding jigs based on the shape of the identification slot 3001 to perform different welding processes, so as to improve the automation and intelligentization of processing.

[0085] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of the present application, they should not limit the patent protection scope of the present application. Any equivalent structure or equivalent process substitution or modification based on the essential concept of the present application, using the content described in the specification and drawings, and directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A battery production line, characterized by, The application relates to a bending and pressure maintaining device (1). The bending and pressure maintaining device (1) comprises a supporting base (11), a rotating pressure block (12) rotationally connected with the supporting base (11) and a limiting block (13) installed on the supporting base (11) to limit the rotating pressure block (12); the supporting base (11) is provided with a positioning groove (1101) for supporting a battery cell group (100), and the positioning groove (1101) is open on the side wall close to the rotating pressure block (12). The rotating pressure block (12) is provided with a limiting groove (1201) for accommodating a circuit board assembly (200); the rotating pressure block (12) is used for driving the circuit board assembly (200) to rotate, so that connecting pieces (300) connected with the circuit board assembly (200) and the battery cell group (100) at two ends are bent into U shapes, and the circuit board assembly (200) is pressed on one end of the battery cell group (100) in the positioning groove (1101); when the circuit board assembly (200) is pressed on one end of the battery cell group (100), the rotating pressure block (12) abuts against the limiting block (13).

2. The battery production line according to claim 1, characterized in that, The supporting base (11) is provided with an adjusting block (14), the adjusting block (14) is provided with a rotating hole, and a bearing is installed in the rotating hole. The rotating pressure block (12) is provided with a rotating shaft (1202), the rotating shaft (1202) is inserted into the inner hole of the bearing, and the rotating shaft (1202) is perpendicular to the extension direction of the positioning groove (1101).

3. The battery production line according to claim 2, characterized in that, The installation positions of the adjusting block (14) and the limiting block (13) can be adjusted along the extension direction of the positioning groove (1101).

4. The battery production line of claim 1, wherein, The bending and pressure maintaining device (1) further comprises a sliding supporting plate (15) and an elastic assembly (16). The sliding supporting plate (15) is slidably installed in the positioning groove (1101) to support the bottom end of the battery cell group (100), and the elastic assembly (16) is installed between the sliding supporting plate (15) and the groove wall of the positioning groove (1101) away from the rotating pressure block (12).

5. The battery production line of claim 1, wherein, The supporting base (11) is provided with a blocking surface (1102), and the rotating pressure block (12) has an extension foot (1203). When the rotating pressure block (12) rotates to a set loading angle, the extension foot (1203) abuts against the blocking surface (1102), and the limiting groove (1201) is upwardly open to support the circuit board assembly (200).

6. The battery production line of claim 1, wherein, The bottom of the supporting base (11) is provided with a supporting base (17), and the top of the supporting base (17) is fixedly connected with the supporting base (11). The bottom of the supporting base (17) is provided with a plurality of suction cups (18).

7. The battery production line of claim 1, wherein, The bending and pressure maintaining device (1) further comprises a circuit board welding device located upstream of the bending and pressure maintaining device (1), and the circuit board welding device comprises a positioning welding jig (2) and an automatic welding module. The positioning welding jig (2) comprises a jig body (23) and a pressing plate (24); the jig body (23) is provided with a first positioning groove (21) for positioning a battery cell group (100) and a second positioning groove (22) for positioning a circuit board assembly (200), and the pressing plate (24) is used for pressing the battery cell group in the first positioning groove (21), and the first positioning groove (21) is communicated with the second positioning groove (22) through a connecting groove (2001); The connecting piece (300) has a connecting body part (301) for connecting the battery cell group (100) and an extended connecting part (302) which is overlapped on the circuit board assembly (200) through the connecting groove (2001); the circuit board assembly (200) is provided with a welding part (201) for connecting the extended connecting part (302).

8. The battery production line according to claim 7, characterized in that, The shape of the first positioning groove (21) is matched with the shape of the battery cell group (100), and the shape of the second positioning groove (22) is matched with the shape of the circuit board assembly (200).

9. The battery production line of claim 7, wherein, The automatic welding module is a laser welding device.

10. The battery production line of claim 7, wherein, Further comprising a battery cell group welding forming device for welding and connecting the connecting piece (300) and the battery cell group (100); The battery cell group welding forming device, the circuit board welding device and the bending and pressure maintaining device (1) are sequentially arranged along a process direction.

11. The battery production line according to claim 10, characterized in that, The battery cell group welding forming device comprises a spot welding jig (3) and a welding manipulator; The spot welding jig (3) comprises a first bottom plate (31), a second top plate (32) and a fixed-width plate (33) connected to the first bottom plate (31) and the second top plate (32) at two ends; The first bottom plate (31) is provided with a first positioning slot (311) for inserting a battery cell, and the second top plate (32) is provided with a second positioning slot (321) corresponding to the first positioning slot (311); The bottom wall of the second positioning slot (321) is provided with a limiting placement groove for accommodating the connecting piece (300), and the limiting placement groove is connected with a through groove (322) for accommodating the extended connecting part (302) of the connecting piece (300); The first bottom plate (31) is provided with a first welding through hole (3111) corresponding to the first positioning slot (311), and the second top plate (32) is provided with a second welding through hole (3211) corresponding to the second positioning slot (321).

12. The battery production line of claim 11, wherein, The second top plate (32) is provided with an identification groove (3001), and the welding manipulator is provided with a visual detection device for identifying the identification groove (3001); The welding manipulator identifies different types of electric welding jigs based on the shape of the identification groove (3001) to perform different electric welding processes.

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