Battery production line

Abstract

The invention relates to the technical field of battery manufacturing, and discloses a battery production line which comprises a bending and pressure maintaining device, the bending pressure maintaining device comprises a supporting base, a rotary pressing block rotationally connected with the supporting base and a limiting block installed on the supporting base to limit the rotary pressing block. The supporting seat is provided with a positioning groove for supporting the battery cell group, and the side wall, close to the rotary pressing block, of the positioning groove is opened; the rotary pressing block is provided with a limiting groove used for containing the circuit board assembly. The rotary pressing block is used for driving the circuit board assembly to rotate, so that the connecting sheet of which the two ends are respectively connected with the circuit board assembly and the battery cell group is bent into a U shape, and the circuit board assembly is pressed against one end of the battery cell group in the positioning groove; and when the circuit board assembly is pressed against one end of the battery cell group, the rotary pressing block is pressed against the limiting block. The battery production line provided by the invention can better improve the production quality of rubber shell batteries, and is beneficial to reducing the labor intensity of workers.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a battery production line. Background Art

[0002] With the development of the new energy industry, especially the rapid development of battery manufacturing, the requirements for battery dimensional accuracy are becoming increasingly stringent.

[0003] As a type of battery, the accuracy of the processing size of the gel-shell battery 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. Workers need to manually bend the connecting piece to bring the circuit board assembly as close to the battery cell group as possible, so that the volume of the gel-shell battery can be smaller. The existing bending method is to manually bend the connecting piece, which is labor-intensive and not conducive to improving the bending quality, and is prone to defective products.

[0004] In view of this, it is necessary to design a battery production line to better improve the production quality of gel-shell batteries and help reduce the labor intensity of workers.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0006] The present invention provides a battery production line, which can better improve the production quality of gel-shell batteries and help reduce the labor intensity of workers.

[0007] To achieve the above object, the present invention 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 support seat, a rotating pressing block rotatably connected to the support seat, and a limiting block installed on the support seat to limit the rotating pressing block; the support seat is provided with a positioning groove for supporting the battery cell group, and the positioning groove is openly arranged near the side wall of the rotating pressing block;

[0010] The rotating pressing block is provided with a limiting groove for accommodating the circuit board assembly; the rotating pressing block is used to drive the circuit board assembly to rotate, so that the connecting pieces at both ends respectively connecting the circuit board assembly and the battery cell group are bent into a U shape, and the circuit board assembly is pressed against one end of the battery cell group in the positioning groove; when the circuit board assembly is pressed against one end of the battery cell group, the rotating pressing block contacts the limiting block.

[0011] Optionally, an adjusting block is installed on the support seat, a rotating hole is provided on the adjusting block, and a bearing is installed in the rotating hole;

[0012] The rotating pressing block is provided with a rotating shaft, the rotating shaft is inserted into the inner hole of the bearing, and the rotating shaft is perpendicular to the extending direction of the positioning groove.

[0013] Optionally, along the extension direction of the positioning groove, the installation positions of the adjustment block and the limit block are adjustable.

[0014] Optionally, the battery production line further comprises a sliding pallet and an elastic component;

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

[0016] Optionally, the support seat is provided with a blocking surface, and the rotating pressing block has an extending foot;

[0017] When the rotating pressing block rotates to a set loading angle, the extending leg contacts the blocking surface, and the notch of the limiting groove faces upward to support the circuit board assembly.

[0018] Optionally, a support base is installed at the bottom of the support seat, and the top of the support base is fixedly connected to the support seat;

[0019] The bottom array of the support base is provided with a plurality of suction cups.

[0020] Optionally, the battery production line further comprises a circuit board welding device located upstream of the bending and pressure maintaining device, wherein the circuit board welding device comprises a positioning welding fixture 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, the pressing plate is used to press the battery cell group in the first positioning groove, and the first positioning groove is connected to the second positioning groove through a connecting groove;

[0022] The connecting piece comprises a connecting body portion for connecting the battery cell group and an extending connecting portion passing through the connecting groove and overlapping the welding portion of the circuit board assembly.

[0023] Optionally, the shape of the first positioning groove is adapted to the shape of the battery cell group, and the shape of the second positioning groove is adapted to 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 piece and the cell group;

[0026] The battery cell group welding and forming equipment, the circuit board welding device and the bending and pressure maintaining device are arranged in sequence along the process direction.

[0027] Optionally, the battery cell group welding forming equipment includes a spot welding jig and a welding manipulator;

[0028] The spot welding fixture comprises a first bottom plate, a second top plate, and fixed width plates at both ends respectively used to connect the first bottom plate and the second top plate;

[0029] The first bottom plate is provided with a first positioning slot for inserting a battery 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 piece, and the limiting placement slot is connected to a through slot for accommodating the extended connecting portion of the connecting piece;

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

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

[0033] The welding robot recognizes different types of welding jigs based on the shape of the recognition groove to perform different welding processes.

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

[0035] The battery production line provided by the present invention is provided with a bending pressure-maintaining device, which can carry and position the circuit board assembly through the limiting groove on the rotating pressure block, carry and position the battery cell group through the positioning groove on the support seat, and then rotate the rotating pressure block to drive the circuit board assembly to rotate relative to the battery cell group. During the rotation of the rotating pressure block, the connecting piece is bent by force to form a U shape, thereby bending the connecting piece; in addition, the limiting block limits the rotating pressure block, which can prevent the circuit board assembly from exerting excessive pressure on the top of the battery cell and causing defective products. The battery production line in this embodiment can effectively improve the bending quality of the gel-shell battery through ingenious structural design, making bending easier to operate and more accurately controlling the bending size, which can effectively improve the bending quality.

[0036] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 It is a schematic structural diagram of the bending and pressure-maintaining device provided by an embodiment of the present invention during pressure-maintaining;

[0039] Figure 2 is a schematic diagram of the three-dimensional structure of a bending and pressure-maintaining device provided in an embodiment of the present invention;

[0040] Figure 3 is a schematic top view of a bending and pressure-maintaining device provided in an embodiment of the present invention;

[0041] Figure 4 is a schematic diagram of the three-dimensional structure of the bending and pressure-maintaining device provided by an embodiment of the present invention when viewed from another perspective;

[0042] Figure 5 is a schematic side view of the bending and pressure-maintaining device provided by an embodiment of the present invention during pressure maintenance;

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

[0044] Figure 7 It is a schematic diagram of the three-dimensional structure of the positioning welding fixture provided by an embodiment of the present invention;

[0045] Figure 8 is an exploded schematic diagram of a positioning welding fixture provided by an embodiment of the present invention;

[0046] Fig. 9 yes Figure 8 The enlarged schematic diagram of the positioning welding fixture at position A;

[0047] Fig.10 Schematic diagram of the three-dimensional structure of the spot welding fixture provided by an embodiment of the present invention;

[0048] Fig.11 is a schematic top view of a spot welding jig provided in an embodiment of the present invention;

[0049] Fig.12 yes Fig.11 Schematic diagram of the AA cross-section structure of the spot welding fixture.

[0050] Figure numerals: 1, bending pressure-maintaining device; 11, support seat; 1101, positioning groove; 1102, blocking surface; 12, rotating pressure block; 1201, limiting groove; 1202, rotating shaft; 1203, extension foot; 13, limiting block; 14, adjusting block; 15, sliding support plate; 16, elastic component; 17, supporting base; 18, suction cup; 2, positioning welding fixture; 201, welding part; 2001, connecting groove; 21, first positioning groove; 22, first Two positioning grooves; 23, a clamping plate; 24, a fixture body; 3, a spot welding fixture; 31, a first bottom plate; 311, a first positioning slot; 32, a second top plate; 321, a second positioning slot; 322, a through slot; 33, a width-fixing plate; 301, a connecting body portion; 302, an extended connecting portion; 3001, an identification slot; 3111, a first welding through hole; 3211, a second welding through hole; 100, a battery cell group; 200, a circuit board assembly; 300, a connecting sheet. DETAILED DESCRIPTION

[0051] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it 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 various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0053] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0054] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0055] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0056] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0057] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0058] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred 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 expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] In view of the defects of the existing manual assembly of plastic shell batteries, the applicant, based on many years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the battery production line more practical. After continuous research and design, and after repeated trial production and improvement, the present invention with real practical value was finally created.

[0061] Please refer to Figures 1 to 12 The embodiment of the present invention provides a battery production line, including a bending and pressure-maintaining device 1; the specific structure of the bending and pressure-maintaining device 1 can be found in Figures 1 to 6 .

[0062] The bending and pressure-maintaining device 1 includes a support seat 11, a rotating pressing block 12 rotatably connected to the support seat 11, and a limiting block 13 installed on the support seat 11 to limit the rotating pressing block 12; the support 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 positioning groove 1101 is openly arranged near the side wall of the rotating pressing block 12, and the positioning groove 1101 is openly arranged near the side wall of the rotating pressing block 12, so that the rotating pressing block 12 can press the circuit board assembly 200 toward the battery cell group 100 from the open position. It should be noted that the workpiece to be bent is a composition 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 whose two ends are respectively connected to the circuit board assembly 200 and the battery cell group 100 is bent into a U shape, and the circuit board assembly 200 is pressed against one end of the battery cell group 100 in the positioning groove 1101; when the circuit board assembly 200 is pressed against one end of the battery cell group 100, the rotating pressing block 12 contacts the limiting block 13.

[0064] The actual bending process is as follows:

[0065] ① Place the workpiece to be bent, that is, position the battery cell group 100 into the positioning groove 1101, and position the circuit board assembly 200 into the limiting groove 1201. At this time, a connecting piece 300 is connected between the battery cell group 100 and the circuit board assembly 200, wherein: Figure 2 The position of the bent connecting piece 300 is particularly reserved in order to facilitate understanding of the bending steps;

[0066] ② Rotate the rotary 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 against the battery cell group 100 at the opening of the positioning groove 1101;

[0067] ③ When the rotating pressing block 12 contacts the limiting block 13, 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 is maintained;

[0068] ④ Rotate the rotary pressing block 12 in the reverse direction, take out the workpiece after the bending and pressure holding, and restart the processing of another workpiece to be bent.

[0069] In the above process, the bending pressure-maintaining device 1 can improve the dimensional consistency of the workpiece to be bent after each bending, and the setting of the bending pressure-maintaining device 1 can make the worker's operation more standardized and convenient, avoiding the appearance of a twisted structure of the connecting piece 300 during the manual bending process. It should also be noted that the setting of the limit block 13 can not only enable the rotating pressing block 12 to rotate to a suitable angle each time, but also effectively avoid the circuit board assembly 200 on the rotating pressing block 12 from exerting too much pressure on the battery cell group 100, thereby comprehensively improving the bending quality and bending yield of the workpiece to be bent.

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

[0071] Optionally, an adjustment block 14 is installed on the support seat 11, and the adjustment block 14 is provided with a rotating hole, in which a bearing is installed; the rotating pressure block 12 is connected to a rotating shaft 1202 for rotationally connecting to the bearing, and 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 provided to reduce friction, improve the rotation stability and rotation accuracy of the rotating shaft 1202, and thus help improve the bending yield. The rotating shaft 1202 is perpendicular to the extension direction of the positioning groove 1101, so that the circuit board assembly 200 can press the ends of multiple single cells at the same time. It should be noted here that the cell group includes multiple single cells.

[0073] Preferably, the installation positions of the adjustment block 14 and the limit block 13 are adjustable along the extension direction of the positioning groove 1101, so that the positions of the adjustment block 14 and the limit block 13 can be adjusted to adapt to the bending requirements between battery cell groups 100 of different sizes and circuit board assemblies 200 of different sizes, thereby improving the scope of application.

[0074] Optionally, the battery production line also includes a sliding pallet 15 and an elastic component 16; the sliding pallet 15 can be slidably installed in the positioning groove 1101 to support the bottom end of the battery cell group 100, and the elastic component 16 is installed between the sliding pallet 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 subjected to pressure from the circuit board assembly 200, the sliding tray 15 can slide appropriately in a direction away from the circuit board assembly 200, thereby preventing the circuit board assembly 200 from exerting excessive impact force on the battery cell group 100 and reducing the possibility of collision damage between the battery cell group 100 and the circuit board assembly 200.

[0076] Optionally, the support base 11 is provided with a blocking surface 1102, and the rotating pressing block 12 has an extension foot 1203; when the rotating pressing block 12 rotates to a set loading angle, the extension foot 1203 contacts the blocking surface 1102, and the notch of the limiting groove 1201 faces upward to support the circuit board assembly 200. Specifically, when the rotating pressing block 12 contacts the blocking surface 1102, the limiting groove 1201 can more conveniently place the circuit board assembly 200 and support the circuit board assembly 200, that is, it is equivalent to being able to more easily place the circuit board assembly 200, so that workers or feeding robots can more easily and accurately place the circuit board assembly 200.

[0077] Optionally, a support base 17 is installed at the bottom of the support base 11, and the top of the support base 17 is fixedly connected to the support base 11; a plurality of suction cups 18 are arranged in an array at the bottom of the support base 17. The support base 17 provides support for the support base 11 and raises the position of the support base 11 to facilitate the operation of workers. In addition, the suction cup 18 adsorbs the support base 17 on the support table, thereby improving the fixing stability of the support base 17 and preventing the support base 17 from shaking or tipping over.

[0078] Optionally, the battery production line further includes a circuit board welding device located upstream of the bending and pressure-maintaining device 1, the circuit board welding device including a positioning welding jig 2 and an automatic welding module; the positioning welding jig 2 includes a jig body 24 and a clamping plate 23; the jig body 24 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, the clamping plate 23 is used to press the battery cell group in the first positioning groove 21, and the first positioning groove 21 is connected to the second positioning groove 22 through the connecting groove 2001; the connecting sheet 300 has a connecting body part 301 for connecting the battery cell group 100 and an extending connecting part 302 that passes through the connecting groove 2001 and overlaps the welding part 201 of the circuit board assembly 200. The connecting body part 301 is welded to the end of the battery cell group 100, and the extending connecting part 302 is welded to the welding part 201 of the circuit board assembly 200. Fig. 9 In the schematic diagram of welding the extended connecting portion 302 to the welding portion 201, the first positioning groove 21 accurately positions the battery cell group 100, and the second positioning groove 22 accurately positions the circuit board assembly 200, thereby improving the precision of positioning the battery cell group 100 and the circuit board assembly 200, and can effectively improve the consistency of welding the connecting piece 300 on the circuit board assembly 200, which is beneficial to improving the production yield.

[0079] Optionally, the shape of the first positioning groove 21 matches the shape of the battery cell group 100 , and the shape of the second positioning groove 22 matches 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 includes a welding and forming device for welding the connecting piece 300 and the battery cell group 100; the battery cell group welding and 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 and forming device welds and connects a plurality of single battery cells and the connecting piece 300, and the circuit board welding device realizes the welding connection between 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 workpiece to be bent, and then the bending and pressure-maintaining device 1 bends and forms the workpiece to be bent.

[0082] Optionally, the battery cell group welding forming equipment includes a spot welding fixture 3 and a welding manipulator; the spot welding fixture 3 includes a first bottom plate 31, a second top plate 32, and a width fixing plate 33 at both ends for connecting the first bottom plate 31 and the second top plate 32 respectively; the width fixing 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 the 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 piece 300, and the limiting placement slot is connected with a through slot 322 for accommodating the extended connecting portion 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.

[0083] In this embodiment, by providing the limited placement groove and the through groove 322 , the relative position between the battery cell group 100 and the connecting piece 300 can be well guaranteed, so that the connecting piece 300 can be accurately spot welded to the end of the battery cell group 100 .

[0084] Optionally, the second top plate 32 is provided with an identification groove 3001, and the welding robot is provided with a visual detection device for identifying the identification groove 3001; the welding robot identifies different types of welding fixtures based on the shape of the identification groove 3001 to perform different welding processes, thereby improving the automation and intelligence of the processing.

[0085] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concept of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A battery production line, characterized in that: It comprises a bending and pressure-maintaining device (1); The bending and pressure-maintaining device (1) comprises a support seat (11), a rotating pressing block (12) rotatably connected to the support seat (11), and a limiting block (13) installed on the support seat (11) to limit the rotating pressing block (12); the support seat (11) is provided with a positioning groove (1101) for supporting the battery cell group (100), and the positioning groove (1101) is openly arranged near the side wall of the rotating pressing block (12); The rotating pressing block (12) is provided with a limiting groove (1201) for accommodating 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) whose two ends respectively connect the circuit board assembly (200) and the battery cell group (100) is bent into a U shape, and the circuit board assembly (200) is pressed against one end of the battery cell group (100) in the positioning groove (1101); when the circuit board assembly (200) is pressed against one end of the battery cell group (100), the rotating pressing block (12) contacts the limiting block (13).

2. The battery production line according to claim 1, characterized in that: An adjusting block (14) is installed on the support seat (11), a rotating hole is provided on the adjusting block (14), and a bearing is installed in the rotating hole; The rotating pressing 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: Along the extension direction of the positioning groove (1101), the installation positions of the adjustment block (14) and the limiting block (13) are adjustable.

4. The battery production line according to claim 1, characterized in that: It also includes a sliding support plate (15) and an elastic component (16); The sliding support plate (15) can be slidably installed in the positioning groove (1101) to support the bottom end of the battery cell group (100), and the elastic component (16) is installed between the sliding support plate (15) and the groove wall of the positioning groove (1101) away from the rotating pressing block (12).

5. The battery production line according to claim 1, characterized in that: The support seat (11) is provided with a blocking surface (1102), and the rotating pressing block (12) has an extension foot (1203); When the rotating pressing block (12) rotates to a set loading angle, the extending leg (1203) contacts the blocking surface (1102), and the notch of the limiting groove (1201) faces upward to support the circuit board assembly (200).

6. The battery production line according to claim 1, characterized in that: A support base (17) is installed at the bottom of the support seat (11), and the top of the support base (17) is fixedly connected to the support seat (11); A plurality of suction cups (18) are arranged in an array at the bottom of the support base (17).

7. The battery production line according to claim 1, characterized in that: It also includes a circuit board welding device located upstream of the bending and pressure-maintaining device (1), and the circuit board welding device includes a positioning welding fixture (2) and an automatic welding module; The positioning welding jig (2) comprises a jig body (24) and a pressing plate (23); the jig body (24) 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); the pressing plate (23) is used to press the battery cell group into the first positioning groove (21), and the first positioning groove (21) is connected to the second positioning groove (22) via a connecting groove (2001); The connecting piece (300) comprises a connecting body portion (301) for connecting to a battery cell group (100) and an extending connecting portion (302) passing through the connecting groove (2001) and overlapping the circuit board assembly (200); the circuit board assembly (200) is provided with a welding portion (201) for connecting to the extending connecting portion (302).

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

9. The battery production line according to claim 7, characterized in that: The automatic welding module is a laser welding device.

10. The battery production line according to claim 7, characterized in that: Also included is a cell group welding and forming device for welding and connecting the connecting sheet (300) and the cell group (100); The battery cell assembly welding and forming equipment, the circuit board welding device and the bending and pressure maintaining device (1) are arranged in sequence along the process direction.

11. The battery production line according to claim 10, characterized in that: The battery cell assembly welding and forming equipment 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 width-fixing plates (33) at two ends respectively used to connect the first bottom plate (31) and the second top plate (32); 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 piece (300), and the limiting placement slot is connected to a through slot (322) for accommodating the extended connecting portion (302) of the connecting piece (300); A first welding through hole (3111) is provided on the first bottom plate (31) corresponding to the first positioning slot (311), and a second welding through hole (3211) is provided on the second top plate (32) corresponding to the second positioning slot (321).

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

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