Pole piece welding positioning carrier and pole piece welding system

Abstract

The invention provides a pole piece welding positioning carrier and a pole piece welding system. The pole piece welding positioning carrier comprises a bottom plate; adsorption pieces are arranged in the supporting assemblies; the side plate assembly comprises an overturning side plate and a side pressing mechanism, the overturning side plate comprises a welding avoiding hole, and the side pressing mechanism is arranged around the welding avoiding hole so as to press the to-be-welded pole piece on the to-be-welded battery; and the top plate assembly comprises an opening and closing top plate and an upward pressing mechanism, a magnetic part is arranged in the opening and closing top plate and corresponds to the adsorption part, and the upward pressing mechanism is connected to the side, facing the bottom plate, of the opening and closing top plate and abuts against the battery to be welded. According to the invention, the battery can be welded through the welding avoiding hole in the carrier, and the side pressing mechanism ensures that the relative position between the pole piece and the battery to be welded is constant, so that the welding quality is improved. In addition, the top plate assembly and the side plate assembly can be flexibly disassembled and assembled, and therefore the advantages of being high in positioning precision, high in compatibility, convenient to assemble, high in stability, easy and convenient to operate and the like are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery processing, in particular to a pole piece welding positioning carrier and a pole piece welding system. BACKGROUND

[0002] In the battery production and assembly process, after the battery pack is completed, the pole piece needs to be welded to realize the conductive connection between the internal battery cell and the external electrode, which directly affects the electrical performance and safety stability of the battery.

[0003] At present, the pole piece welding process is difficult to accurately position. After the battery pack is completed, due to the small size and thin thickness of the pole piece, the offset is caused by the assembly error, the deformation of the pole piece itself, and the insufficient positioning accuracy of the tooling fixture. This offset will cause the deviation of the welding position and the preset welding area, which will cause insufficient welding strength, increased contact resistance, and affect the conductivity of the battery. In severe cases, it may cause defects such as virtual welding and missed welding, and even cause short circuit, heating and other safety hazards, which seriously restricts the quality stability and production yield of the battery product.

[0004] In addition, the existing positioning method relies on calibration equipment for quality inspection after welding, which focuses on quality control after welding. However, this post-detection mode has obvious limitations: although the calibration equipment can identify unqualified products after welding, it can only screen out the existing defective products and cannot fundamentally avoid the welding defects caused by positioning offset during the welding process. For unqualified products screened out, reprocessing and repair are needed, which not only increases the additional working hours and cost, but also may further damage the pole piece or the shell structure during the secondary welding, resulting in the complete scrap of some products, which seriously affects the production efficiency and cost control.

[0005] Therefore, how to solve the accurate positioning problem of the pole piece after the battery pack is completed, and improve the welding quality from the source, has become one of the key challenges to improve the level of battery production process. SUMMARY

[0006] Therefore, the technical problem to be solved by the present application is to overcome the problem of low stability and precision of the pole piece welding after the battery pack is completed in the prior art, and to provide a pole piece welding positioning carrier and a pole piece welding system.

[0007] To solve the above technical problems, the application provides a pole piece welding positioning carrier, which comprises a bottom plate, two support assemblies arranged at two ends of the length direction of the bottom plate, at least one suction accessory arranged in any of the support assemblies, a side plate assembly comprising two turnover side plates arranged at two ends of the width direction of the bottom plate and capable of being turned around the joint with the bottom plate to open and close the pole piece welding positioning carrier, a plurality of side pressing mechanisms arranged around a plurality of welding avoidance holes of the turnover side plate, a top plate assembly supported on the top of the support assembly, a fixed space formed by the bottom plate, the support assembly and the side plate assembly, an opening and closing top plate and at least one upper pressing mechanism.

[0008] In an embodiment of the application, the side pressing mechanism comprises an assembly block and a side pressing head, the assembly block is detachably connected to the turnover side plate, and the side pressing head is connected to the assembly block and protrudes towards the fixed space.

[0009] In an embodiment of the application, the upper pressing mechanism comprises a mounting seat, an elastic member and an upper pressing head, one end of the mounting seat is detachably connected to the opening and closing top plate, the other end extends towards the fixed space, the elastic member and the upper pressing head are connected to the inside of the mounting seat, wherein the upper pressing head protrudes from the mounting seat towards the fixed space, and the elastic member is arranged between the upper pressing head and the opening and closing top plate.

[0010] In an embodiment of the application, the pole piece welding positioning carrier further comprises at least one mounting bracket connected to the support assembly, a rotating connecting pin arranged on the mounting bracket, and the side plate assembly is rotatably connected to the rotating connecting pin.

[0011] In an embodiment of the application, at least one of the support assemblies is provided with a pressing block connected to the support assembly and protruding towards the fixed space to abut against the side wall of the battery to be welded.

[0012] In an embodiment of the application, at least one of the support assemblies is provided with a guide groove recessed from the top of the support assembly, and the top plate assembly is provided with at least one guide column which can be arranged in the guide groove.

[0013] In one embodiment of the present invention, the support assembly is provided with a plurality of top panel positioning pins and a plurality of side panel positioning pins, the plurality of top panel positioning pins are arranged on the top of the support assembly and protrude toward the top panel assembly to be embedded in the plurality of top panel positioning holes of the opening and closing top panel; the plurality of side panel positioning pins are arranged on the side wall of the support assembly and protrude toward the side panel assembly to be embedded in the plurality of side panel positioning holes of the flip side panel.

[0014] In one embodiment of the present invention, a positioning protrusion is provided on the bottom plate, and the positioning protrusion is protruded toward the fixing space so as to be embedded in the bottom surface of the battery to be welded.

[0015] The present invention also provides a pole piece welding system, which includes the pole piece welding positioning carrier mentioned above.

[0016] In one embodiment of the present invention, the pole piece welding system also includes a material moving component, which is arranged on one side of the pole piece welding positioning carrier, and includes a material moving robot and a clamping mechanism, and the clamping mechanism is arranged at the working end of the material moving robot, and includes a frame, an opening and closing drive, two clamps and a detection sensor, the frame is connected to the material moving robot, the opening and closing drive is connected to the frame, and the two clamps are respectively connected to the two working ends of the opening and closing drive to move relatively close to / away from each other, and the detection sensor is connected to one of the clamps and is arranged toward the other clamp.

[0017] The above technical solution of the present invention has the following advantages over the prior art: The pole piece welding positioning carrier and pole piece welding system described in the present invention enclose a fixed space through a base plate, a support assembly, a side plate assembly and a top plate assembly to accommodate and fix the battery to be welded and the pole piece thereon, wherein the welding avoidance hole on the side plate assembly can accurately expose the connection between the pole piece and the battery, so that the battery can be welded inside the carrier without the need for additional adjustment of the battery position, thereby reducing the error caused by secondary positioning; at the same time, the multiple side pressure mechanisms on the side plate assembly can be pressed in a targeted manner according to the distribution characteristics of the pole piece, ensuring that the relative position between the pole piece and the battery to be welded remains constant, thereby maximizing the relative stability of the position between the pole piece and the battery from the source, effectively avoiding defects such as cold welding, leaking welding, and welding deviation caused by weld point offset during welding, and significantly improving the consistency of welding quality.

[0018] In addition, when loading and unloading batteries, the top plate assembly and side plate assembly adopt a modular detachable design, which can be flexibly disassembled and assembled, completely eliminating scratching, extrusion and other interference and damage to the battery shell or pole pieces during loading and unloading, and reducing material loss.

[0019] Compared with the conventional pole piece welding technology at the present stage, the application has the advantages of high positioning accuracy, strong compatibility, convenient assembly, high stability and simple operation, and has a wide application prospect in the industry. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the content of the application more easily understood, the application will be further described in detail below according to specific embodiments of the application and in conjunction with the drawings.

[0021] Figure 1 is a perspective structural schematic diagram of the pole piece welding positioning carrier in the preferred embodiment of the application; Figure 2 is Figure 1 a schematic diagram of the internal structure of the pole piece welding positioning carrier shown in the figure; Figure 3 is Figure 1 a schematic diagram of the internal structure of the pole piece welding positioning carrier shown in the figure; Figure 4 is Figure 1 a perspective structural schematic diagram of one side pressing mechanism in the pole piece welding positioning carrier shown in the figure; Figure 5 is Figure 1 a perspective structural schematic diagram of the top plate assembly in the pole piece welding positioning carrier shown in the figure; Figure 6 is Figure 1 a perspective structural schematic diagram of one upper pressing mechanism in the pole piece welding positioning carrier shown in the figure; Figure 7 is Figure 6 a schematic diagram of the internal structure of the upper pressing mechanism shown in the figure; Figure 8 is Figure 1 a perspective structural schematic diagram of the opening and closing top plate in the pole piece welding positioning carrier shown in the figure; Figure 9 is a perspective structural schematic diagram of the material moving assembly in the pole piece welding system according to another embodiment of the application; Figure 10 is Figure 9 an enlarged structural diagram at A in the figure.

[0022] The description of the drawings is as follows: 100, bottom plate; 110, positioning bump; 200, support assembly; 210, guide groove; 220, suction accessory; 230, compression block; 240, top plate positioning pin; 250, side plate positioning pin; 300, side plate assembly; 310, turnover side plate; 311, welding avoidance hole; 320, side compression mechanism; 321, assembly block; 322, side compression head; 400, top plate assembly; 410, opening and closing top plate; 411, magnetic piece; 420, upper compression mechanism; 421, mounting seat; 422, elastic piece; 423, upper compression head; 430, guide column; 500, mounting rack; 510, rotary connection pin; 600, material moving assembly; 610, material moving robot; 620, clamping mechanism; 621, rack body; 622, opening and closing driver; 623, clamping plate; 624, detection sensor. DETAILED DESCRIPTION

[0023] The present application will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it. The embodiments are not intended to limit the present application.

[0024] Embodiment one:

[0025] Referring to Figure 1 As shown, the present embodiment provides a pole piece welding positioning carrier, which comprises a bottom plate 100, two support assemblies 200, the two support assemblies 200 are arranged at both ends in the length direction of the bottom plate 100, and at least one suction accessory 220 is arranged inside any of the support assemblies; a side plate assembly 300, the side plate assembly 300 comprises two turnover side plates 310 and a plurality of side compression mechanisms 320, the two turnover side plates 310 are arranged at both ends in the width direction of the bottom plate 100 respectively, and the turnover side plates 310 can be turned around the joint with the bottom plate 100 to open and close the pole piece welding positioning carrier, one of the turnover side plates 310 comprises a plurality of welding avoidance holes 311, and a plurality of side compression mechanisms 320 are arranged around the welding avoidance holes 311 respectively to compress the to-be-welded pole piece on the to-be-welded battery; a top plate assembly 400, the top plate assembly 400 is supported on the top of the support assembly 200, and it, the bottom plate 100, the support assembly 200 and the side plate assembly 300 together enclose a fixed space, which comprises an opening and closing top plate 410 and at least one upper compression mechanism 420, the opening and closing top plate 410 is internally provided with at least one magnetic piece 411, the magnetic piece 411 is arranged corresponding to the suction accessory 220, the upper compression mechanism 420 is connected to the side of the opening and closing top plate 410 facing the bottom plate 100, and abuts against the to-be-welded battery.

[0026] The pole piece welding positioning carrier described in the embodiment encloses a fixing space through the bottom plate 100, the support assembly 200, the side plate assembly 300 and the top plate assembly 400 to accommodate and fix the battery and the pole piece thereon, wherein the welding avoidance hole 311 on the side plate assembly 300 can accurately expose the connection between the pole piece and the battery, so that the welding process can be completed inside the carrier without the need for additional adjustment of the battery position, reducing the error caused by secondary positioning; at the same time, the plurality of side pressing mechanisms 320 on the side plate assembly 300 can be pressed according to the distribution characteristics of the pole piece to ensure that the relative position between the pole piece and the battery to be welded remains constant, thereby maximizing the relative stability of the position between the pole piece and the battery from the source, effectively avoiding defects such as virtual welding, missed welding and welding deviation caused by welding point deviation during the welding process, and significantly improving the consistency of the welding quality. In addition, when the battery is loaded and unloaded, the top plate assembly 400 and the side plate assembly 300 adopt a modular and detachable design, which can be flexibly disassembled and assembled, completely eliminating the interference and damage to the battery shell or pole piece during the loading and unloading process, and reducing material loss.

[0027] Referring to Figure 2 and Figure 3 As shown, in the embodiment, the bottom plate 100 serves as the basic support structure of the entire carrier, provides an installation reference and a stable bearing platform for other assemblies, and is the base of the entire device. In the embodiment, the bottom plate 100 is provided with a positioning protrusion 110, which is protrudingly arranged towards the fixing space to be embedded in the bottom surface of the battery to be welded. The positioning protrusion 110 can accurately position and fix the battery to be welded from the bottom: when the battery to be welded is placed on the bottom plate 100, the positioning protrusion 110 protruding towards the fixing space on the bottom plate 100 can be embedded in the pre-designed positioning groove or corresponding position of the bottom surface of the battery, forming a concave-convex fitting structure. This design can limit the displacement of the battery in the horizontal plane from the bottom, so as to form a three-dimensional positioning system with the side pressing mechanism 320 of the side plate assembly 300 and the upper pressing mechanism 420 of the top plate assembly 400, further improving the positioning accuracy and stability of the battery in the carrier.

[0028] The two support assemblies 200 in the embodiment are used to detachably connect the top plate assembly 400 and the side plate assembly to improve the stability of the fixed space. The suction accessories 220 inside can cooperate with the magnetic parts 411 in the top plate assembly 400 to achieve stable connection of the top plate assembly 400 and the support assembly 200 through magnetic suction, thereby ensuring the stability of the fixed space. Specifically, the suction accessories 220 in the embodiment are preferably magnets, and in different embodiments, the suction accessories 220 can be set in different numbers or installed at different positions according to actual use requirements, and the present application does not make specific limitations thereon. Specifically, the support assembly 200 in the embodiment is provided with a plurality of top plate positioning pins 240 and a plurality of side plate positioning pins 250. The plurality of top plate positioning pins 240 are arranged on the top of the support assembly 200 and protrude towards the top plate assembly 400 to be embedded in a plurality of top plate positioning holes of the opening and closing top plate 410. The plurality of side plate positioning pins 250 are arranged on the side wall of the support assembly 200 and protrude towards the side plate assembly 300 to be embedded in a plurality of side plate positioning holes of the turnover side plate. In this way, the docking accuracy of the support assembly 200 between the top plate assembly 400 and the side plate assembly 300 is improved.

[0029] Further, at least one support assembly 200 in the embodiment is provided with a pressing block 230 connected to the support assembly 200 and protruding towards the fixed space to abut against the side wall of the battery to be welded. In the embodiment, the pressing block 230 arranged on the support assembly 200 mainly plays a role in strengthening the positioning stability of the battery to be welded from the side direction. When the battery to be welded is placed in the fixed space of the carrier, the pressing block 230 connected to the support assembly 200 and protruding towards the fixed space will directly abut against the side wall of the battery. This design can form stable lateral constraint on the battery from the horizontal direction, and through the close abutment of the pressing block 230 and the side wall of the battery, the horizontal shaking or displacement of the battery can be effectively limited, thereby ensuring that the battery always maintains the preset position and posture during welding. This design further improves the relative positioning accuracy of the battery and the tab, provides a more stable basis for welding operation, and helps to ensure the consistency and reliability of the welding quality.

[0030] Specifically, at least one support assembly 200 in the embodiment is provided with a guide groove 210 recessed downward from the top of the support assembly 200, and the top plate assembly 400 is provided with at least one guide column 430 which can be inserted into the guide groove 210. When the top plate assembly 400 is closed on the top of the support assembly 200, the cooperation of the guide column 430 and the guide groove 210 can provide accurate motion trajectory guidance for the closing process of the top plate assembly 400, thereby ensuring that the top plate assembly 400 can be accurately buckled along the preset direction and avoiding deviation or misplacement during closing.

[0031] Referring to Figure 3 and Figure 4 As shown in the drawings, the side plate assembly 300 in the embodiment is used to fix the battery welding surface, wherein the turnover side plates 310 are respectively arranged at both ends of the bottom plate 100 in the width direction and can be turned over at the connection with the bottom plate 100 to realize the opening and closing of the carrier, facilitating the placement and removal of the to-be-welded pole piece and battery. Specifically, the pole piece welding positioning carrier further comprises at least one mounting frame 500 connected to the support assembly 200, wherein a rotating connection pin 510 is arranged on the mounting frame 500, and the side plate assembly 300 is rotatably connected to the rotating connection pin 510. The mounting frame 500 serves as an intermediate carrier connecting the support assembly 200 and the side plate assembly 300, and is fixedly connected to the support assembly 200 to provide a stable mounting basis for the rotating connection pin 510. Through the arrangement of the mounting frame 500, the rotating support point of the side plate assembly 300 can be accurately positioned at the preset position, ensuring that the turning track of the turnover side plate 310 meets the design requirements, and enhancing the overall strength of the connecting structure. The rotating connection pin 510 is arranged on the mounting frame 500 and is a core component for realizing the rotation of the side plate assembly 300. The side plate assembly 300 is rotatably connected to the mounting frame 500 through the rotating connection pin 510, so that the turnover side plate 310 can be flexibly turned around the connection pin, thereby realizing the opening and closing operation of the pole piece welding positioning carrier. The arrangement of the rotating connection pin 510 ensures the smoothness and stability of the turning action, avoids the occurrence of jamming or deviation of the side plate assembly 300 during the turning process, ensures the accuracy of the carrier opening and closing, and further guarantees the convenience and positioning accuracy of the placement and removal of the to-be-welded pole piece and battery.

[0032] Further, the plurality of welding avoidance holes 311 on the turnover side plate 310 are spaces reserved for welding operation, ensuring that the welding tool can smoothly contact the to-be-welded part. The specific position and number of the welding avoidance holes 311 are not limited in the present application.

[0033] Further, a plurality of side pressing mechanisms 320 are arranged around the welding avoidance hole 311, which can press the to-be-welded tab tightly on the to-be-welded battery from the side when the carrier is closed, preventing the tab from moving relative to the battery during welding to ensure the accuracy of the welding position. Specifically, the plurality of side pressing mechanisms 320 in the embodiment are arranged on one side of the welding avoidance hole 311 to press and fix the to-be-welded tab. In this way, the space required for welding operation is avoided, the welding of the battery and the tab inside the carrier is realized, and stable pressure can be applied to the position adjacent to the welding area to make the tab tightly adhere to the surface of the battery. During welding, the contact surface of the tab and the battery will not have a small gap or relative sliding due to welding heat or external vibration. The restraining force formed by the side pressing mechanism 320 directly acts on the periphery of the to-be-welded area, which can minimize the deviation error of the welding position and ensure that the preset welding track of the tab and the battery completely coincides, thereby improving the accuracy and yield of welding.

[0034] Specifically, the side pressing mechanism 320 includes an assembly block 321 and a side pressing head 322, the assembly block 321 is detachably connected to the turnover side plate 310, and the side pressing head 322 is connected to the assembly block 321 and protrudes towards the fixed space. Wherein, the assembly block 321 is the installation basis of the side pressing mechanism 320, which is detachably connected to the turnover side plate 310, so that the whole side pressing mechanism 320 can be conveniently disassembled, replaced or position adjusted. This detachable design facilitates quick replacement of the appropriate side pressing assembly according to different models of tabs or battery specifications, improving the versatility and adaptability of the carrier. The side pressing head is connected to the assembly block 321 and protrudes towards the fixed space, which is the component directly contacting the to-be-welded tab. Its protruding length and end shape can be designed according to the thickness, material and pressing requirement of the tab to ensure that the tab can be pressed tightly on the surface of the battery with appropriate force and contact area.

[0035] Referring to Figures 5 to 8 As shown, the top plate assembly 400 is supported on the top of the support assembly 200, and cooperates with the bottom plate 100, the support assembly 200 and the side plate assembly 300 to form a fixed space for accommodating and positioning the to-be-welded tab and battery. The magnetic member 411 arranged thereon is arranged correspondingly with the suction member 220 of the support assembly 200, and the opening and closing and fixing of the top plate can be realized by magnetic suction. When the top plate is closed, the upper pressing mechanism 420 abuts against the to-be-welded battery to apply pressure to the battery from above, further fixing the battery and the tab in the carrier to ensure the stability of the overall structure during welding.

[0036] Specifically, the pressing mechanism 420 in this embodiment includes a mounting seat 421, an elastic member 422 and an upper pressing head 423, one end of the mounting seat 421 is detachably connected to the opening and closing top plate 410, and the other end extends toward the fixed space, the elastic member 422 and the upper pressing head 423 are both connected to the inside of the mounting seat 421, wherein the upper pressing head 423 protrudes from the mounting seat 421 toward the fixed space, and the elastic member 422 is arranged between the upper pressing head 423 and the opening and closing top plate 410. Among them, the mounting seat 421 provides a mounting carrier for the elastic member 422 and the upper pressing head 423. The structural design of the mounting seat 421 can ensure that it can accurately act on the preset pressing point of the battery to be welded. The elastic member 422 is preferably a spring, which is arranged between the upper pressing head 423 and the opening and closing top plate 410 and is the core component for achieving flexible compression. When the opening and closing top plate 410 is closed, the upper pressure head 423 first contacts the battery surface. As the top plate continues to press down, the elastic member 422 is compressed and generates a reverse elastic force, causing the upper pressure head 423 to act on the battery with a constant pressure. This elastic buffer design can not only avoid deformation or damage to the battery caused by rigid compression, but also adapt to the compression requirements of batteries of different thicknesses, ensuring uniform and stable pressure. The upper pressure head 423 protrudes from the mounting seat 421 toward the fixed space and is a component that directly contacts the battery surface. Under the action of the elastic member 422, the upper pressure head 423 can always fit tightly to the battery surface, limit the vertical displacement of the battery from the top, and cooperate with other positioning structures to achieve three-dimensional fixation of the battery.

[0037] In summary, the various components in this application cooperate with each other to achieve precise positioning and firm fixation of the electrode and battery to be welded by applying pressure to the battery and electrode from different directions, providing a reliable operating platform for electrode welding and ensuring welding quality.

[0038] Example 2:

[0039] See also Figure 9 and Figure 10 As shown, this embodiment provides a pole piece welding system, which includes the pole piece welding positioning carrier described in Example 1. Furthermore, the pole piece welding system also includes a material moving component 600, which is arranged on one side of the pole piece welding positioning carrier, and includes a material moving robot 610 and a clamping mechanism 620, and the clamping mechanism 620 is arranged at the working end of the material moving robot 610, and includes a frame 621, an opening and closing driver 622, two clamping plates 623 and a detection sensor 624, the frame 621 is connected to the material moving robot 610, the opening and closing driver 622 is connected to the frame 621, and the two clamping plates 623 are respectively connected to the two working ends of the opening and closing driver 622 to move relatively close to / away from each other, and the detection sensor 624 is connected to one of the clamping plates 623 and is arranged toward the other clamping plate 623.

[0040] In summary, the pole piece welding positioning carrier and the pole piece welding system can accommodate and fix the battery and the pole piece on the battery to be welded by the bottom plate 100, the support assembly 200, the side plate assembly 300 and the top plate assembly 400. The welding avoidance hole 311 on the side plate assembly 300 can accurately expose the connection between the pole piece and the battery, so that the welding process can be completed inside the carrier without additional adjustment of the battery position, reducing the error caused by secondary positioning. At the same time, the multiple side pressing mechanisms 320 on the side plate assembly 300 can be pressed according to the distribution characteristics of the pole piece, ensuring that the relative position between the pole piece and the battery to be welded remains constant, maximizing the relative stability of the position between the pole piece and the battery from the source, effectively avoiding defects such as virtual welding, missed welding and welding deviation caused by welding point deviation during the welding process, and significantly improving the consistency of the welding quality. In addition, when the battery is loaded and unloaded, the top plate assembly 400 and the side plate assembly 300 adopt a modular and detachable design, which can be flexibly disassembled and assembled, completely eliminating the interference and damage to the battery shell or the pole piece during the loading and unloading process, and reducing material loss. Compared with the conventional pole piece welding technology at the present stage, the application has the advantages of high positioning accuracy, strong compatibility, easy assembly, high stability and simple operation, and has a wide application prospect in the industry.

[0041] Obviously, the above embodiments are only examples for clearly illustrating, and are not limited to the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A pole piece welding positioning carrier, characterized by: include: base plate; Two support assemblies, the two support assemblies are arranged at both ends of the bottom plate in the length direction, and at least one adsorption member is provided inside any of the support assemblies; A side plate assembly, the side plate assembly comprising two flip side plates and a plurality of side pressure mechanisms, the two flip side plates being respectively disposed at both ends of the bottom plate in the width direction, and the flip side plates being capable of flipping around their connection with the bottom plate to open and close the electrode piece welding positioning carrier, one flip side plate comprising a plurality of welding avoidance holes, and the plurality of side pressure mechanisms being respectively disposed around the plurality of welding avoidance holes to press the electrode piece to be welded onto the battery to be welded; A top plate assembly is supported on the top of the support assembly, and together with the bottom plate, the support assembly and the side plate assembly, a fixed space is enclosed. The top plate assembly includes an opening and closing top plate and at least one pressing mechanism. At least one magnetic member is provided inside the opening and closing top plate, and the magnetic member is provided corresponding to the adsorption member. The pressing mechanism is connected to the side of the opening and closing top plate facing the bottom plate, and abuts against the battery to be welded.

2. The electrode piece welding positioning carrier according to claim 1, characterized in that: The side pressure mechanism includes an assembly block and a side pressure head. The assembly block is detachably connected to the flip side plate. The side pressure head is connected to the assembly block and protrudes toward the fixed space.

3. The electrode piece welding positioning carrier according to claim 1, characterized in that: The upper pressing mechanism includes a mounting seat, an elastic member and an upper pressing head, one end of the mounting seat is detachably connected to the opening and closing top plate, and the other end extends toward the fixed space, the elastic member and the upper pressing head are both connected to the inside of the mounting seat, wherein the upper pressing head protrudes from the mounting seat toward the fixed space, and the elastic member is arranged between the upper pressing head and the opening and closing top plate.

4. The pole piece welding positioning carrier according to claim 1, characterized in that: The pole piece welding positioning carrier further comprises at least one mounting bracket, which is connected to the support assembly and is provided with a rotating connecting pin, and the side plate assembly is rotatably connected to the rotating connecting pin.

5. The pole piece welding positioning carrier according to claim 1, characterized in that: At least one of the support components is provided with a pressing block, which is connected to the support component and protrudes toward the fixed space to abut against the side wall of the battery to be welded.

6. The pole piece welding positioning carrier according to claim 1, characterized in that: At least one of the support components is provided with a guide groove, which is recessed downward from the top of the support component; at least one guide column is provided on the top plate component, and the guide column can be inserted into the guide groove.

7. The electrode piece welding positioning carrier according to claim 1, characterized in that: The support assembly is provided with a plurality of top plate positioning pins and a plurality of side plate positioning pins. The plurality of top plate positioning pins are arranged on the top of the support assembly and protrude toward the top plate assembly to be embedded in the plurality of top plate positioning holes of the opening and closing top plate; the plurality of side plate positioning pins are arranged on the side wall of the support assembly and protrude toward the side plate assembly to be embedded in the plurality of side plate positioning holes of the flip side panel.

8. The pole piece welding positioning carrier according to claim 1, characterized in that: The bottom plate is provided with a positioning protrusion, and the positioning protrusion is protruded toward the fixing space so as to be embedded in the bottom surface of the battery to be welded.

9. A pole piece welding system, characterized in that: The pole piece welding positioning carrier comprises the pole piece welding positioning carrier according to any one of claims 1 to 8.

10. The electrode welding system according to claim 9, characterized in that: The pole piece welding system also includes a material moving component, which is arranged on one side of the pole piece welding positioning carrier, and includes a material moving robot and a clamping mechanism. The clamping mechanism is arranged at the working end of the material moving robot, and includes a frame, an opening and closing drive, two clamping plates and a detection sensor. The frame is connected to the material moving robot, the opening and closing drive is connected to the frame, and the two clamping plates are respectively connected to the two working ends of the opening and closing drive to move relatively close to / away from each other. The detection sensor is connected to one of the clamping plates and is arranged toward the other clamping plate.

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