Fool-proof welding secondary battery top cover

Abstract

The invention belongs to the technical field of secondary battery top covers, and discloses a fool-proof welding secondary battery top cover which comprises a top cover assembly, a positioning assembly is arranged at the top end of the top cover assembly, a rack is arranged in the middle position between the top cover assembly and the positioning assembly, and longitudinal guide rails are symmetrically installed on the front side and the rear side of the middle of the top end of the rack correspondingly; and transverse guide rails are symmetrically mounted on the left side and the right side of the top end of the rack. The positioning groove is formed in the positioning assembly, the corresponding positioning points are arranged on the top cover body, and the positioning assembly can move downwards in the preset direction through the clamping effect of the auxiliary positioning assembly and the longitudinal guide rail, so that the positive electrode and the negative electrode can be rapidly determined during welding, and if the direction of the positioning assembly is wrong, the positioning assembly can be rapidly welded. The positioning grooves cannot correspond to the positioning points, welding cannot be completed at the moment, fool-proof welding is completed, it is guaranteed that errors do not occur during welding, battery scrapping caused by welding dislocation is avoided, and the machining quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of secondary battery top covers, in particular to a secondary battery top cover with fool-proof welding. Background Art

[0002] Secondary batteries, also known as rechargeable batteries or storage batteries, are batteries that can be used again after being discharged by recharging the active material. Their working principle is based on the reversibility of electrochemical reactions, that is, after a chemical reaction is converted into electrical energy, the chemical system can be repaired with electrical energy, and then converted into electrical energy by chemical reaction. During the processing of secondary batteries, the top cover part needs to be welded, that is, the battery plate and the top cover of the battery need to be welded.

[0003] When welding the battery top cover, the prior art generally welds the positive plate and the negative plate of the battery to the positive and negative poles on the battery top cover respectively. The welding methods currently used all require distinguishing the positive and negative poles before welding, and no fool-proof design is used between the plate and the top cover, resulting in the plate having to repeatedly confirm the positive and negative poles before welding to ensure that there will be no mistakes in welding, otherwise the secondary battery will be scrapped and its processing quality will be affected.

[0004] At the same time, when welding the top cover of the secondary battery, the plate part needs to distinguish the positive and negative poles, and the battery plate part needs to be positioned. In the prior art, it is necessary to repeatedly move the plate to achieve the positioning between the plate and the pole. The whole positioning welding process is relatively complicated, which seriously affects its welding efficiency. Summary of the invention

[0005] The object of the present invention is to provide a secondary battery top cover with fool-proof welding to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a secondary battery top cover for fool-proof welding, comprising a top cover assembly, a positioning assembly is provided at the top of the top cover assembly, a frame is provided at the middle position between the top cover assembly and the positioning assembly, longitudinal guide rails are symmetrically installed on the front and rear sides of the middle of the top of the frame, transverse guide rails are symmetrically installed on the left and right sides of the top of the frame, ear plates are installed on the bottom end of the frame, auxiliary positioning assemblies are movably connected inside the longitudinal guide rails, the auxiliary positioning assemblies are located above the positioning assemblies, the auxiliary positioning assemblies are displaced up and down relative to the longitudinal guide rails, reset assemblies are installed on the relatively distant sides of the two frames, the top of the reset assembly is connected to the bottom end of the auxiliary positioning assembly, battery plates are provided on the left and right sides between the top cover assembly and the positioning assembly, auxiliary welding assemblies are installed on the bottom end of the auxiliary positioning assemblies, and the left and right sides of the two auxiliary welding assemblies are movably connected with the two battery plates respectively; The top cover assembly comprises a top cover body, pole plates are installed on both the left and right sides of the top of the top cover body, positioning points located between the two pole plates are installed on both the left and right sides of the top of the top cover body, the two positioning points are in the same direction, and grooves are provided at the relatively close ends of the two pole plates; The two battery plates are fixedly connected with a positioning protrusion on one side that is relatively far away from each other. The positioning protrusion is adapted to the groove. When the battery plate and the pole plate are welded in place, the positioning protrusion and the groove are mutually clamped. Positioning columns are installed on the front and rear sides of the two battery plates that are relatively close to one end. The battery plates are movably clamped with the auxiliary welding assembly through the positioning columns.

[0007] Before actual use, the frame needs to be placed in the middle position of the bottom end of the top cover assembly, and the positioning assembly needs to be placed above the top cover assembly. At the same time, the two battery plates need to be placed between the top cover assembly and the positioning assembly and on the left and right sides, and the two battery plates need to be clamped with the auxiliary welding assembly. At the same time, the two auxiliary positioning assemblies need to be placed above the positioning assembly to complete the preparations before welding.

[0008] As a further technical solution of the present invention, the positioning assembly includes a cover plate, which is located directly above the top cover body. The left and right sides of the cover plate are provided with through grooves located directly above the pole plate and matched with the pole plate.

[0009] As a further technical solution of the present invention, positioning grooves matching the positioning points are provided at the bottom of the cover plate near the left and right sides, and the direction of the positioning grooves is consistent with the direction of the positioning points. Limiting grooves are provided on the front and rear sides of the middle part of the cover plate, and the limiting grooves are movably connected with the auxiliary positioning components.

[0010] When welding, the two positioning grooves at the bottom end of the cover plate can be made correspondent with the two positioning points at the top end of the top cover body to ensure that the direction of the positioning groove is consistent with the direction of the positioning point. After ensuring consistency, the limit columns and the limit grooves at the bottom ends of the two positioning frames can be made correspondent to each other, that is, the limit columns and the limit grooves can be movably connected to complete the assembly between the cover plate and the positioning frame. After the assembly is completed, the two longitudinal guide blocks can be connected to the longitudinal guide rails. At this time, the assembly of the longitudinal guide blocks and the longitudinal guide rails can be completed. After the assembly is completed, the two auxiliary positioning components can be pressed downward at the same time. At this time, the positioning frame can be moved downward relative to the longitudinal guide rail until the positioning grooves and the positioning points correspond to each other, and the positioning process of the positive and negative poles can be completed.

[0011] By providing a positioning component, a positioning groove on the positioning component, and a corresponding positioning point on the top cover body, and through the clamping action of the auxiliary positioning component and the longitudinal guide rail, it is ensured that the positioning component can move downward in a predetermined direction, so that the positive and negative poles can be quickly determined during welding, and if the direction of the positioning component is wrong, the positioning groove cannot correspond to the positioning point, and the welding cannot be completed at this time, so the fool-proof welding is completed, ensuring that no mistakes will be made during welding, avoiding welding misalignment that causes the battery to be scrapped, and improving the processing quality.

[0012] As a further technical solution of the present invention, the auxiliary positioning assembly includes a positioning frame, which is located directly above the cover plate. The two relatively distant sides of the positioning frames are fixedly connected with longitudinal guide blocks. The positioning frames are movably connected to the longitudinal guide blocks and the longitudinal guide rails, and the positioning frames move up and down relative to the longitudinal guide rails.

[0013] As a further technical solution of the present invention, the bottom end of the positioning frame is fixedly connected with a limiting column located above the limiting groove. When the bottom end of the positioning frame contacts the top end of the cover plate, the limiting column and the limiting groove are movably engaged.

[0014] As a further technical solution of the present invention, the auxiliary welding assembly includes two first fixed seats, which are symmetrically installed at the bottom end of the longitudinal guide block, and the ends of the two first fixed seats away from the longitudinal guide block are movably connected to connecting rods through a rotating shaft, and the ends of the connecting rods away from the first fixed seats are movably connected to the second fixed seats through a rotating shaft.

[0015] As a further technical solution of the present invention, an auxiliary mounting block is installed at the bottom end of the second fixing seat, and a transverse guide block is installed on one side of the auxiliary mounting block. The auxiliary mounting block is movably connected with the transverse guide rail through the transverse guide block, and the transverse guide block is displaced left and right relative to the transverse guide rail. Positioning holes are provided on the relatively distant sides of the two auxiliary mounting blocks, and the positioning holes are movably connected with the positioning columns.

[0016] When welding the battery plates, the two positioning columns and the positioning holes on one side of the battery plates can be engaged with each other. At this time, the connection between the auxiliary mounting block and the battery plate can be completed. When the auxiliary positioning assembly moves downward, the connecting rod at the bottom is deflected toward the outer side, that is, the angle between the two connecting rods increases, and a force is applied to the two auxiliary mounting blocks. At this time, the two auxiliary mounting blocks move away from each other. When the two auxiliary mounting blocks move away from each other, the two battery plates can be synchronously driven to move away from each other until the positioning protrusion and the groove on one side of the battery plate are engaged with each other. The positioning before welding can be completed. After the positioning is completed, the battery plate and the column plate can be welded.

[0017] By utilizing the downward movement of the auxiliary positioning assembly during the positive and negative electrode positioning process and connecting the battery plate with the auxiliary welding assembly, the battery plate can be automatically displaced left and right during the positioning of the positive and negative electrodes, and the automatic positioning process before welding can be completed. The whole process can be completed quickly without the need for traditional welding methods that require repeated position adjustments before welding to complete the positioning problem. The positioning time is significantly shortened, the welding accuracy is ensured, and the welding efficiency is improved.

[0018] As a further technical solution of the present invention, the reset assembly includes a movable rod, the top end of the movable rod is connected to the bottom end of the auxiliary positioning assembly, and the reset assembly also includes a fixed sleeve, which is connected to one side of the frame.

[0019] As a further technical solution of the present invention, the bottom end of the movable rod passes through the top of the fixed sleeve and is fixedly connected to a movable plate located inside the fixed sleeve, the bottom end of the movable plate is fixedly connected to a reset spring located inside the fixed sleeve, and the bottom end of the reset spring is connected to the bottom end of the inner cavity of the fixed sleeve.

[0020] When performing positive and negative pole positioning and positioning before welding, due to the downward displacement of the auxiliary positioning assembly, the longitudinal guide block moves downward accordingly, and drives the movable rod to move downward. At this time, the movable plate moves downward accordingly, and the reset spring is compressed. When the positioning before welding is completed and the welding between the battery plate and the top cover assembly is completed, the auxiliary positioning assembly is no longer subjected to downward pressure. At this time, the reset spring automatically resets, and the movable rod can be driven to rise. At this time, the auxiliary positioning assembly and the positioning assembly rise accordingly and leave the top of the top cover assembly. At this time, the entire welding process is completed and the positioning assistance is automatically released.

[0021] By utilizing the positive and negative electrode positioning and the positioning process before welding, the energy storage process of the reset assembly is completed, and after the welding is completed, the separation process between the device and the top cover assembly can be automatically realized by releasing the downward pressure. The whole process can be completed automatically, which can significantly improve the welding efficiency during batch welding of top cover assemblies and battery plates, improve the overall welding efficiency, and improve the degree of automation and practicability.

[0022] The beneficial effects of the present invention are as follows: 1. The present invention is provided with a positioning component, a positioning groove is provided on the positioning component, and a corresponding positioning point is provided on the top cover body. The auxiliary positioning component and the longitudinal guide rail are engaged to ensure that the positioning component can move downward in a predetermined direction, so that the positive and negative poles can be quickly determined during welding. If the direction of the positioning component is wrong, the positioning groove cannot correspond to the positioning point, and welding cannot be completed at this time. The fool-proof welding is completed to ensure that no mistakes will be made during welding, avoid welding misalignment that leads to battery scrapping, and improve processing quality.

[0023] 2. The present invention utilizes the downward movement process of the auxiliary positioning assembly during the positive and negative electrode positioning process, and connects the battery plate with the auxiliary welding assembly, so that during the positioning process of the positive and negative electrodes, the battery plate can be automatically displaced left and right, and the automatic positioning process before welding can be completed. The whole process can be completed quickly, and there is no need for the traditional welding method to repeatedly adjust the position before welding to complete the positioning problem. The positioning time is significantly shortened, the welding accuracy is ensured, and the welding efficiency is improved.

[0024] 3. The present invention completes the energy storage process of the reset assembly by utilizing the positive and negative electrode positioning and the positioning process before welding, and after the welding is completed, the separation process between the device and the top cover assembly can be automatically realized by releasing the downward pressure. The whole process can be completed automatically, which can significantly improve the welding efficiency during batch welding of top cover assemblies and battery plates, improve the overall welding efficiency, and improve the degree of automation and practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the bottom structure of the present invention; Figure 3 It is an exploded schematic diagram of the top cover assembly and the positioning assembly structure of the present invention; Figure 4 It is an exploded schematic diagram of the positioning assembly and the auxiliary positioning assembly structure of the present invention; Figure 5 This is a schematic diagram of the present invention in a state where the top cover component and the positioning component are hidden; Figure 6 is a separate schematic diagram of a battery plate of the present invention; Figure 7 It is an exploded schematic diagram of the auxiliary positioning assembly, the frame and the auxiliary welding assembly structure of the present invention; Figure 8 It is a cross-sectional schematic diagram of the internal structure of the reset assembly of the present invention; Fig. 9 for Figure 4 A magnified schematic diagram of the structure in the middle.

[0026] In the figure: 1. top cover assembly; 101. top cover body; 102. pole plate; 103. positioning point; 104. groove; 2. positioning assembly; 201. cover plate; 202. through groove; 203. limit groove; 204. positioning groove; 3. auxiliary positioning assembly; 301. positioning frame; 302. limit column; 303. longitudinal guide block; 4. frame; 5. ear plate; 6. transverse guide rail; 7. longitudinal guide rail; 8. auxiliary welding assembly; 801. first fixing seat; 802. second fixing seat; 803. connecting rod; 804. auxiliary mounting block; 805. transverse guide block; 806. positioning hole; 9. reset assembly; 901. movable rod; 902. fixing sleeve; 903. movable plate; 904. reset spring; 10. battery plate; 11. positioning column; 12. positioning protrusion. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 8 As shown, in the embodiment of the present invention, a fool-proof welded secondary battery top cover comprises a top cover assembly 1, a positioning assembly 2 is provided at the top end of the top cover assembly 1, a frame 4 is provided at the middle position between the top cover assembly 1 and the positioning assembly 2, longitudinal guide rails 7 are symmetrically installed on the front and rear sides of the middle of the top end of the frame 4, transverse guide rails 6 are symmetrically installed on the left and right sides of the top end of the frame 4, and ear plates 5 are installed at the bottom end of the frame 4, and auxiliary positioning assemblies 3 are movably connected inside the longitudinal guide rails 7, the auxiliary positioning assemblies 3 are located above the positioning assembly 2, and the auxiliary positioning assemblies 3 are displaced up and down relative to the longitudinal guide rails 7, and reset assemblies 9 are installed on the relatively far sides of the two frames 4, and the top of the reset assembly 9 is connected to the bottom end of the auxiliary positioning assembly 3, battery plates 10 are provided on the left and right sides between the top cover assembly 1 and the positioning assembly 2, and auxiliary welding assemblies 8 are installed at the bottom end of the auxiliary positioning assembly 3, and the left and right sides of the two auxiliary welding assemblies 8 are movably connected with the two battery plates 10 respectively; The top cover assembly 1 includes a top cover body 101, and pole plates 102 are installed on both sides of the top of the top cover body 101. Positioning points 103 located between the two pole plates 102 are installed on both sides of the top of the top cover body 101. The two positioning points 103 are in the same direction, and the ends of the two pole plates 102 that are relatively close to each other are provided with grooves 104. The two battery plates 10 are fixedly connected to one side relatively far away from each other with a positioning protrusion 12, and the positioning protrusion 12 is adapted to the groove 104. When the battery plates 10 and the pole plate 102 are welded in place, the positioning protrusion 12 and the groove 104 are mutually clamped. Positioning columns 11 are installed on the front and rear sides of the two battery plates 10 relatively close to one end, and the battery plates 10 are movably clamped with the auxiliary welding assembly 8 through the positioning columns 11.

[0029] Before actual use, the frame 4 needs to be placed in the middle position of the bottom end of the top cover assembly 1, and the positioning assembly 2 needs to be placed above the top cover assembly 1. At the same time, the two battery plates 10 need to be placed between the top cover assembly 1 and the positioning assembly 2 and on the left and right sides, and the two battery plates 10 need to be clamped with the auxiliary welding assembly 8. At the same time, the two auxiliary positioning assemblies 3 need to be placed above the positioning assembly 2 to complete the preparations before welding.

[0030] like Figure 2 and Figure 3 as well as Figure 4 and Fig. 9 As shown, the positioning assembly 2 includes a cover plate 201, which is located directly above the top cover body 101. The left and right sides of the cover plate 201 are provided with through grooves 202 located directly above the pole plate 102 and adapted to the pole plate 102. Positioning grooves 204 adapted to the positioning point 103 are provided at the bottom of the cover plate 201 near the left and right sides. The direction of the positioning groove 204 is consistent with the direction of the positioning point 103. The front and rear sides of the middle part of the cover plate 201 are provided with limiting grooves 203. The limiting grooves 203 are movably connected with the auxiliary positioning assembly 3, and the auxiliary The auxiliary positioning component 3 includes a positioning frame 301, which is located directly above the cover plate 201. The two positioning frames 301 are fixedly connected to the longitudinal guide block 303 on the relatively distant side. The positioning frames 301 are movably connected to the longitudinal guide rail 7 through the longitudinal guide block 303. The positioning frames 301 move up and down relative to the longitudinal guide rail 7. The bottom ends of the positioning frames 301 are fixedly connected to the limiting columns 302 located above the limiting grooves 203. When the bottom ends of the positioning frames 301 contact the top ends of the cover plate 201, the limiting columns 302 are movably connected to the limiting grooves 203.

[0031] Embodiment: During welding, the two positioning grooves 204 at the bottom of the cover plate 201 can be made to correspond to the two positioning points 103 at the top of the top cover body 101 to ensure that the direction of the positioning groove 204 is consistent with the direction of the positioning point 103. After ensuring consistency, the limiting columns 302 at the bottom of the two positioning frames 301 can be made to correspond to the limiting grooves 203, that is, the limiting columns 302 and the limiting grooves 203 can be movably connected to complete the assembly between the cover plate 201 and the positioning frame 301. After the assembly is completed, the two longitudinal guide blocks 303 can be connected to the longitudinal guide rail 7. At this time, the assembly of the longitudinal guide blocks 303 and the longitudinal guide rail 7 can be completed. After the assembly is completed, the two auxiliary positioning components 3 can be pressed downward at the same time. At this time, the positioning frame 301 can be moved downward relative to the longitudinal guide rail 7 until the positioning grooves 204 and the positioning points 103 correspond to each other, and the positioning process of the positive and negative poles can be completed.

[0032] By providing a positioning component 2, a positioning groove 204 is provided on the positioning component 2, and a corresponding positioning point 103 is provided on the top cover body 101, and the clamping action of the auxiliary positioning component 3 and the longitudinal guide rail 7, it is ensured that the positioning component 2 can move downward in a predetermined direction, so that the positive and negative poles can be quickly determined during welding, and if the direction of the positioning component 2 is wrong, the positioning groove 204 cannot correspond to the positioning point 103, and the welding cannot be completed at this time, so the fool-proof welding is completed, ensuring that no mistakes will be made during welding, avoiding welding misalignment that leads to battery scrapping, and improving the processing quality.

[0033] like Figure 2 and Figure 5 as well as Figure 7 As shown, the auxiliary welding assembly 8 includes two first fixed seats 801, and the two first fixed seats 801 are symmetrically installed at the bottom end of the longitudinal guide block 303. The ends of the two first fixed seats 801 away from the longitudinal guide block 303 are movably connected with the connecting rod 803 through a rotating shaft, and the ends of the connecting rod 803 away from the first fixed seat 801 are movably connected with the second fixed seat 802 through a rotating shaft, and the bottom end of the second fixed seat 802 is installed with an auxiliary mounting block 804, and one side of the auxiliary mounting block 804 is installed with a transverse guide block 805. The auxiliary mounting block 804 is movably connected with the transverse guide rail 6 through the transverse guide block 805, and the transverse guide block 805 is displaced left and right relative to the transverse guide rail 6. A positioning hole 806 is opened on the relatively distant side of the two auxiliary mounting blocks 804, and the positioning hole 806 is movably connected with the positioning column 11.

[0034] Embodiment: When welding the battery plate 10, the two positioning columns 11 on one side of the battery plate 10 can be engaged with the positioning holes 806. At this time, the connection between the auxiliary mounting block 804 and the battery plate 10 can be completed. When the auxiliary positioning assembly 3 moves downward, the connecting rod 803 at the bottom is deflected toward the outer side, that is, the angle between the two connecting rods 803 increases, and a force is applied to the two auxiliary mounting blocks 804. At this time, the two auxiliary mounting blocks 804 move away from each other. When the two auxiliary mounting blocks 804 move away from each other, the two battery plates 10 can be synchronously driven to move away from each other until the positioning protrusion 12 on one side of the battery plate 10 is engaged with the groove 104. The positioning before welding can be completed. After the positioning is completed, the battery plate 10 and the column plate 102 can be welded.

[0035] By utilizing the downward movement of the auxiliary positioning component 3 during the positive and negative electrode positioning process, and connecting the battery plate 10 with the auxiliary welding component 8, the battery plate 10 can be automatically displaced left and right during the positioning of the positive and negative electrodes, and the automatic positioning process before welding can be completed. The whole process can be completed quickly without the need for traditional welding methods that require repeated position adjustments before welding to complete the positioning problem. The positioning time is significantly shortened, the welding accuracy is ensured, and the welding efficiency is improved.

[0036] like Figure 1 and Figure 2 as well as Figure 5 and Figure 8 As shown, the reset component 9 includes a movable rod 901, the top of which is connected to the bottom end of the auxiliary positioning component 3, and the reset component 9 also includes a fixed sleeve 902, which is connected to one side of the frame 4, the bottom end of the movable rod 901 passes through the top of the fixed sleeve 902 and is fixedly connected to a movable plate 903 located inside the fixed sleeve 902, the bottom end of the movable plate 903 is fixedly connected to a reset spring 904 located inside the fixed sleeve 902, and the bottom end of the reset spring 904 is connected to the bottom end of the inner cavity of the fixed sleeve 902.

[0037] When performing positive and negative pole positioning and positioning before welding, due to the downward displacement of the auxiliary positioning assembly 3, the longitudinal guide block 303 moves downward accordingly, and drives the movable rod 901 to move downward. At this time, the movable plate 903 moves downward accordingly, and the reset spring 904 is compressed. When the positioning before welding is completed and the welding between the battery plate 10 and the top cover assembly 1 is completed, the downward pressure on the auxiliary positioning assembly 3 is no longer applied. At this time, the reset spring 904 automatically resets, and the movable rod 901 can be driven to rise. At this time, the auxiliary positioning assembly 3 and the positioning assembly 2 rise accordingly and leave the top of the top cover assembly 1. At this time, the entire welding process is completed and the positioning assistance is automatically released.

[0038] By utilizing the positive and negative pole positioning and the positioning process before welding, the energy storage process of the reset component 9 is completed, and after the welding is completed, the separation process between the device and the top cover component 1 can be automatically realized by releasing the downward pressure. The whole process can be completed automatically, which can significantly improve the welding efficiency during batch welding of the top cover component 1 and the battery plate 10, improve the overall welding efficiency, and improve the degree of automation and practicability.

[0039] Working principle and usage process: Before actual use, the frame 4 needs to be placed in the middle of the bottom end of the top cover assembly 1, and the positioning assembly 2 needs to be placed above the top cover assembly 1. At the same time, the two battery plates 10 need to be placed between the top cover assembly 1 and the positioning assembly 2 and at the left and right sides, and the two battery plates 10 need to be clamped with the auxiliary welding assembly 8. At the same time, the two auxiliary positioning assemblies 3 need to be placed above the positioning assembly 2 to complete the preparation before welding; When welding, the two positioning grooves 204 at the bottom of the cover plate 201 can be made to correspond to the two positioning points 103 at the top of the top cover body 101, ensuring that the direction of the positioning groove 204 is consistent with the direction of the positioning point 103. After ensuring consistency, the limiting posts 302 at the bottom ends of the two positioning frames 301 can be made to correspond to each other with the limiting grooves 203, that is, the limiting posts 302 and the limiting grooves 203 can be movably connected to complete the assembly between the cover plate 201 and the positioning frame 301. After the assembly is completed, the two longitudinal guide blocks 303 can be connected to the longitudinal guide rail 7. At this time, the assembly of the longitudinal guide blocks 303 and the longitudinal guide rail 7 can be completed. After the assembly is completed, the two auxiliary positioning components 3 can be pressed downward at the same time. At this time, the positioning frame 301 can be moved downward relative to the longitudinal guide rail 7 until the positioning grooves 204 and the positioning points 103 correspond to each other, and the positioning process of the positive and negative electrodes can be completed. When welding the battery plate 10, the two positioning columns 11 on one side of the battery plate 10 can be engaged with the positioning holes 806, and the connection between the auxiliary mounting block 804 and the battery plate 10 can be completed. When the auxiliary positioning assembly 3 moves downward, the connecting rod 803 at the bottom is deflected toward the outer side, that is, the angle between the two connecting rods 803 increases, and a force is applied to the two auxiliary mounting blocks 804. At this time, the two auxiliary mounting blocks 804 move away from each other. When the two auxiliary mounting blocks 804 move away from each other, the two battery plates 10 can be synchronously driven to move away from each other until the positioning protrusion 12 on one side of the battery plate 10 is engaged with the groove 104, and the positioning before welding is completed. After the positioning is completed, the battery plate 10 and the column plate 102 can be welded; When performing positive and negative pole positioning and positioning before welding, due to the downward displacement of the auxiliary positioning assembly 3, the longitudinal guide block 303 moves downward accordingly, and drives the movable rod 901 to move downward. At this time, the movable plate 903 moves downward accordingly, and the reset spring 904 is compressed. When the positioning before welding is completed and the welding between the battery plate 10 and the top cover assembly 1 is completed, the downward pressure on the auxiliary positioning assembly 3 is no longer applied. At this time, the reset spring 904 automatically resets, and the movable rod 901 can be driven to rise. At this time, the auxiliary positioning assembly 3 and the positioning assembly 2 rise accordingly and leave the top of the top cover assembly 1. At this time, the entire welding process is completed and the positioning assistance is automatically released.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A foolproof welded secondary battery top cover, comprising a top cover assembly (1), characterized in that: A positioning assembly (2) is provided at the top of the top cover assembly (1); a frame (4) is provided at a middle position between the top cover assembly (1) and the positioning assembly (2); longitudinal guide rails (7) are symmetrically installed on both front and rear sides of the middle of the top of the frame (4); transverse guide rails (6) are symmetrically installed on both left and right sides of the top of the frame (4); ear plates (5) are installed at the bottom of the frame (4); auxiliary positioning assemblies (3) are movably connected inside the longitudinal guide rails (7); and the auxiliary positioning assemblies (3) are located above the positioning assembly (2). The auxiliary positioning assembly (3) is displaced up and down relative to the longitudinal guide rail (7); a reset assembly (9) is installed on the relatively distant sides of the two frames (4); the top end of the reset assembly (9) is connected to the bottom end of the auxiliary positioning assembly (3); battery plates (10) are provided on the left and right sides between the top cover assembly (1) and the positioning assembly (2); auxiliary welding assemblies (8) are installed on the bottom end of the auxiliary positioning assembly (3); and the left and right sides of the two auxiliary welding assemblies (8) are movably connected to the two battery plates (10) respectively; The top cover assembly (1) comprises a top cover body (101), pole plates (102) are installed on both left and right sides of the top of the top cover body (101), positioning points (103) located between the two pole plates (102) are installed on both left and right sides of the top of the top cover body (101), the two positioning points (103) are in the same direction, and grooves (104) are provided at relatively close ends of the two pole plates (102); A positioning protrusion (12) is fixedly connected to the side of the two battery plates (10) that is relatively far away from each other. The positioning protrusion (12) and the groove (104) are adapted to each other. When the battery plates (10) and the pole plate (102) are welded in place, the positioning protrusion (12) and the groove (104) are mutually engaged. Positioning columns (11) are installed on both the front and rear sides of the two battery plates (10) that are relatively close to one end. The battery plates (10) are movably engaged with the auxiliary welding assembly (8) via the positioning columns (11).

2. The foolproof welded secondary battery top cover according to claim 1, characterized in that: The positioning assembly (2) comprises a cover plate (201), the cover plate (201) being located directly above the top cover body (101), and the left and right sides of the cover plate (201) are provided with through grooves (202) located directly above the pole plate (102) and adapted to the pole plate (102).

3. The foolproof welded secondary battery top cover according to claim 2, characterized in that: Positioning grooves (204) adapted to the positioning points (103) are provided at positions near the left and right sides of the bottom end of the cover plate (201); the direction of the positioning grooves (204) is consistent with the direction of the positioning points (103); and limiting grooves (203) are provided at the front and rear sides of the middle of the cover plate (201); the limiting grooves (203) are movably engaged with the auxiliary positioning assembly (3).

4. The foolproof welded secondary battery top cover according to claim 3, characterized in that: The auxiliary positioning assembly (3) comprises a positioning frame (301), the positioning frame (301) being located directly above the cover plate (201), and the two positioning frames (301) are fixedly connected to a longitudinal guide block (303) on one side that is relatively far away from the other. The positioning frames (301) are movably connected to the longitudinal guide rail (7) through the longitudinal guide block (303), and the positioning frames (301) are displaced up and down relative to the longitudinal guide rail (7).

5. The foolproof welded secondary battery top cover according to claim 4, characterized in that: The bottom end of the positioning frame (301) is fixedly connected to a limiting column (302) located above the limiting groove (203); when the bottom end of the positioning frame (301) contacts the top end of the cover plate (201), the limiting column (302) and the limiting groove (203) are movably engaged.

6. The foolproof welded secondary battery top cover according to claim 5, characterized in that: The auxiliary welding assembly (8) comprises two first fixing seats (801), the two first fixing seats (801) are symmetrically mounted at the bottom end of the longitudinal guide block (303), one end of the two first fixing seats (801) away from the longitudinal guide block (303) is movably connected to a connecting rod (803) via a rotating shaft, and one end of the connecting rod (803) away from the first fixing seat (801) is movably connected to a second fixing seat (802) via a rotating shaft.

7. The foolproof welded secondary battery top cover according to claim 6, characterized in that: An auxiliary mounting block (804) is installed at the bottom end of each of the second fixing seats (802); a transverse guide block (805) is installed on one side of each of the auxiliary mounting blocks (804); the auxiliary mounting blocks (804) are movably connected to the transverse guide rail (6) through the transverse guide block (805); the transverse guide block (805) is displaced left and right relative to the transverse guide rail (6); positioning holes (806) are provided on the relatively distant sides of the two auxiliary mounting blocks (804); the positioning holes (806) are movably connected to the positioning posts (11).

8. The foolproof welded secondary battery top cover according to claim 7, characterized in that: The reset assembly (9) comprises a movable rod (901), the top end of the movable rod (901) being connected to the bottom end of the auxiliary positioning assembly (3), and the reset assembly (9) further comprises a fixing sleeve (902), and the fixing sleeve (902) is connected to one side of the frame (4).

9. The foolproof welded secondary battery top cover according to claim 8, characterized in that: The bottom end of the movable rod (901) passes through the top end of the fixed sleeve (902) and is fixedly connected to a movable plate (903) located inside the fixed sleeve (902); the bottom end of the movable plate (903) is fixedly connected to a return spring (904) located inside the fixed sleeve (902); the bottom end of the return spring (904) is connected to the bottom end of the inner cavity of the fixed sleeve (902).

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