Lithium battery assembly production line and assembly method

Abstract

The present invention discloses a lithium battery assembly production line and an assembly method, the production line includes a jig conveyor line, a battery jig is provided with a conveying and holding mechanism, the conveying and holding mechanism positions and clamps the battery in the first stroke of the conveying action; a shelling tooling, the middle part of which positions and clamps the battery in the second stroke of the shelling action; a welding tooling, the welding fixing mechanism positions and clamps the battery in the third stroke of the welding action; the first stroke, the second stroke and the third stroke together constitute the assembly processing stroke of the battery on the jig conveyor line. Through the above arrangement, in the assembly process of the lithium battery, whether it is conveying, shelling or welding, different mechanisms are used to limit and constrain the battery, ensuring that the whole process of battery assembly has a high degree of stability and identity, reducing the tedious alignment process after transportation between different workstations, and can also stably maintain various states in the battery assembly, which is conducive to ensuring the quality of the final product.

Description

Technical Field

[0001] The present invention relates to the field of lithium battery technology, and in particular to a lithium battery assembly production line and an assembly method. Background Art

[0002] Lithium battery processing and production is a hot industry in the current new energy sector. Its overall manufacturing process is relatively cumbersome and complicated. It can be divided into three stages: the front stage, the middle stage, and the back stage. The front stage mainly focuses on the preparation of raw materials, the middle stage mainly focuses on the assembly of batteries, and the back stage mainly focuses on battery testing, capacity division, etc., thus forming a complete lithium battery.

[0003] The assembly process also includes many steps. Taking the square battery as an example, after obtaining the three raw materials of the top cover, two battery cells and aluminum shell, it needs to go through a whole set of assembly processes such as feeding, core assembly, gluing, ear processing, shell insertion, pressing, top cover welding, etc. before it can be assembled into a complete battery.

[0004] In the prior art, corresponding equipment is designed for the shelling, press-fitting and welding processes, such as shelling machines, press-fitting machines or top cover welding machines, which can well meet the requirements of each process. However, in the existing lithium battery processing technology, whether the above-mentioned multiple stations are arranged in a dispersed manner or arranged in a whole line, the battery cells, top covers and shells need to be transported. Therefore, the battery cells, top covers and shells at different stations need to be assembled after multiple constraints and positioning, and transported after the constraints are released. Not only is the operation cumbersome and easy to damage the battery, but also in the battery assembly production process, only a few strokes are strictly limited, such as shelling, press-fitting, or welding. Except for these actions, the battery cells, top covers and shells are in a relatively free state.

[0005] This free state will require re-positioning every time the processing is performed, affecting production efficiency. What is more serious is that it is difficult to maintain the quality of products processed at different workstations. For example, after shelling and press-fitting, the aluminum shell and the top cover are only in a state of press-fitting. During the transfer to the welding station, the aluminum shell will rebound, resulting in damage to the press-fitting effect. It is difficult to meet the alignment requirements between the aluminum shell and the top cover during subsequent welding, which will ultimately affect the quality of the product. Summary of the invention

[0006] In order to solve the defects in the prior art, the present invention provides a lithium battery assembly production line and an assembly method.

[0007] As the first object of the present invention, the technical solution adopted by the present invention is that a lithium battery assembly production line comprises:

[0008] A jig conveyor line, on which a battery jig is conveyed, wherein the battery jig is provided with a conveying and holding mechanism, and the conveying and holding mechanism positions and clamps the battery in a first stroke of the conveying action;

[0009] A shell inserting tool, comprising a centering portion, wherein the centering portion positions and clamps the battery during a second stroke of the shell inserting tool performing the shell inserting action;

[0010] A welding tool, comprising a welding fixing mechanism and a welding head mechanism, wherein the welding fixing mechanism positions and clamps the battery in a third stroke of the welding head mechanism performing a welding action;

[0011] The shell inserting tool and the welding tool are both located on the conveying path of the jig conveyor line, and the first stroke, the second stroke and the third stroke together constitute the assembly processing stroke of the battery on the jig conveyor line.

[0012] Preferably, the battery fixture is provided with a mounting seat for placing the top cover, the conveying and holding mechanism includes a clamping and limiting mounting frame and a plurality of clamping and limiting components, the clamping and limiting mounting frame is located on both sides of the mounting seat, and the clamping and limiting components include:

[0013] A clamping and limiting bidirectional screw rod, both ends of which are rotatably arranged on the clamping and limiting mounting frame, and the clamping and limiting bidirectional screw rod is provided with two sections of reverse threads;

[0014] A power mechanism, which is drivingly connected to the clamping and limiting bidirectional screw rod;

[0015] Two clamping limit members are slidably connected to the clamping limit mounting frame along the length direction of the clamping limit bidirectional screw rod, and are respectively threadedly matched with the two ends of the clamping limit bidirectional screw rod. The two clamping limit members are suitable for respectively abutting against the opposite sides of the top cover.

[0016] Preferably, the centering part includes a battery core clamping and aligning mechanism for clamping the battery core; an aluminum shell clamping and aligning mechanism for clamping the aluminum shell and aligning the aluminum shell with the battery core; and the shell inserting tooling also includes:

[0017] A driving mechanism drives the battery core clamping and alignment mechanism and the aluminum shell clamping and alignment mechanism to synchronously perform a clamping action;

[0018] The shell insertion mechanism is used to take the aluminum shell and insert it onto the battery cell.

[0019] Preferably, the shell inserting tool further includes a guiding mechanism.

[0020] The guide mechanism comprises a fixed bracket and a movable bracket, wherein the movable bracket is slidably arranged on the fixed bracket in a direction from the aluminum shell clamping and aligning mechanism to the battery core clamping and aligning mechanism, and the fixed bracket is slidably constrained on the shell feeding conveyor line;

[0021] The shell insertion mechanism is fixed on the fixing bracket;

[0022] The battery core clamping and alignment mechanism, the aluminum shell clamping and alignment mechanism and the driving mechanism are arranged on the movable bracket.

[0023] Preferably, the movable bracket is provided with a pair of slide rails, the aluminum shell clamping alignment mechanism includes a pair of aluminum shell clamping plates, each of the aluminum shell clamping plates is correspondingly matched to one of the slide rails, and the output end of the driving mechanism is connected to the aluminum shell clamping plate;

[0024] The battery cell clamping and alignment mechanism comprises a pair of battery cell clamping members, and each battery cell clamping member is connected to one of the aluminum shell clamping plates.

[0025] Preferably, the welding fixing mechanism includes a protective cover, a supporting claw, and a lifting motor, the supporting claw is located below the battery cell, and a space for accommodating the battery cell is formed between the supporting claw and the protective cover, and the lifting motor drives the protective cover and / or the supporting claw to approach each other to fix the battery cell.

[0026] Preferably, the welding tool comprises a fixed frame and a movable frame, the fixed frame is slidably limited on the welding conveyor line, and the movable frame is slidably connected to the fixed frame;

[0027] The supporting claw is fixed on the movable frame, and when the movable frame slides in a direction close to the battery core, the supporting claw is inserted under the battery core.

[0028] Preferably, it also includes a pressing tool and a clamping tool, which are located between the shell insertion tool and the welding tool and on the conveying path of the jig conveyor line. The clamping tool positions and clamps the battery in the fourth stroke of the pressing tool performing the pressing action.

[0029] Preferably, the clamping tool includes: a first clamping assembly, including a first driving member and a first clamping member, the first driving member is used to drive the first clamping member to open and close along a first straight line direction; a second clamping assembly, including a second driving member and a second clamping member, the second driving member is connected to the first clamping member, and is used to drive the second clamping member to open and close along a second straight line direction perpendicular to the first straight line direction; a third clamping assembly, including a third driving member and a third clamping member, the third driving member is connected to the second clamping member, and is used to drive the third clamping member to open and close along a third straight line direction, the third straight line direction, the first straight line and the second straight line direction are perpendicular to each other.

[0030] Preferably, the production line further comprises: a shell entry conveyor line, wherein the shell entry tool has an aluminum shell fixed therein and is driven to move along the shell entry conveyor line; there is a shell entry section parallel to each other between the jig conveyor line and the shell entry conveyor line, and when the battery jig and the shell entry tool enter the shell entry section, they are in relative positions and move at the same speed and in the same direction; and / or,

[0031] A press-fitting conveyor line, the clamping tool is driven to move along the press-fitting conveyor line; there is a press-fitting section parallel to each other between the press-fitting conveyor line and the jig conveyor line, and when the battery jig and the clamping tool enter the press-fitting section, they are in relative positions and move at the same speed and in the same direction; and / or;

[0032] A welding conveyor line, wherein the welding tool is driven to move along the welding conveyor line; there is a welding section parallel to each other between the jig conveyor line and the welding conveyor line, and when the battery jig and the welding tool enter the welding section, they are positioned relative to each other and move at the same speed and in the same direction.

[0033] As a second object of the present invention, the present invention further proposes a lithium battery assembly method, which is applied to a lithium battery assembly production line, wherein the production line includes a jig conveyor line, a shell insertion tool and a welding tool, and the assembly method includes: the battery jig moves along the jig conveyor line for a first conveying stroke to the shell insertion tool, and in the first conveying stroke, the top cover and / or the battery cell on the battery jig are kept positioned and clamped; the shell insertion tool positions and clamps the battery, and then releases the positioning and clamping after the shell insertion action is performed;

[0034] The battery jig moves along the jig conveyor line for a second conveying stroke to the welding tooling, and in the second conveying stroke, the top cover and / or aluminum shell on the battery jig is kept positioned and clamped; the welding tooling positions and clamps the battery, and then releases the positioning and clamping after performing the welding action.

[0035] Preferably, when the shell inserting tool positions and clamps the battery, the battery fixture releases the positioning and clamping of the battery synchronously or with delay; when the shell inserting tool releases the positioning and clamping of the battery, the battery fixture positions and clamps the battery synchronously or in advance; and / or,

[0036] When the welding tool positions and clamps the battery, the battery fixture releases the positioning and clamping of the battery synchronously or with a delay; when the welding tool releases the positioning and clamping of the battery, the battery fixture positions and clamps the battery synchronously or in advance.

[0037] Preferably, the assembly method further includes, after executing the shell insertion action and before entering the welding tooling, that the battery jig moves along the jig conveyor line for a third conveying stroke to the clamping tooling, and maintains the positioning and clamping of the top cover and / or aluminum shell on the battery jig during the third conveying stroke; the clamping tooling positions and clamps the battery, and then the clamping tooling releases the positioning and clamping after the pressing tooling performs the pressing action.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. During the assembly process of lithium batteries, whether it is conveying, shelling or welding, different mechanisms are used to limit the position of the batteries, ensuring that the entire process of battery assembly has a high degree of stability and uniformity, reducing the tedious alignment process after transportation between different workstations, and being able to stably maintain various states in battery assembly, which is conducive to ensuring the quality of the final product;

[0040] 2. The battery jig is constantly circulating on the jig conveyor line, and there is no need to stop when performing processing procedures such as shelling and welding, which ensures a dynamic processing method, greatly improves the overall production efficiency, and also makes the overall rotation smooth and orderly, reducing the various stop, start and coordination control problems caused by intermittent stops;

[0041] 3. The overall design of the shell insertion tooling is ingenious. The driving mechanism can synchronously drive the battery cell clamping alignment mechanism and the aluminum shell clamping alignment mechanism to perform the clamping action, which can not only save a power source, but also facilitate the alignment of the battery cell and the aluminum shell in the vertical direction, ensuring the accuracy of subsequent shell insertion; and the battery cell clamping alignment mechanism and the aluminum shell clamping alignment mechanism can be close to and away from each other in the vertical direction, so that the battery cell and the aluminum shell are initially shelled under the state of limit constraints, ensuring the quality of shell insertion;

[0042] 4. The protective cover set on the welding tool can protect the top cover during welding, reducing the adverse effects of welding on the battery; combined with the supporting claws and the lifting motor, the entire battery can be clamped, which is beneficial to ensure the quality of welding, and the supporting claws lift the entire battery from the battery fixture. At this time, there is no power transmission between the battery and the battery fixture, that is, the transportation of the battery depends entirely on the advancement of the welding tool. Therefore, when the welding head mechanism is welding, it only needs to control the movement between the welding trajectory and the welding tool to keep synchronization, and it is no longer necessary to consider the movement speed of the battery fixture, which greatly simplifies the control difficulty during welding and is beneficial to improving the welding quality;

[0043] 5. When inserting the battery into the shell and welding, the battery fixture will release the limiting effect on the top cover, which is conducive to the centering and welding fixing mechanism to center, position and clamp the battery, thereby avoiding the force interference with the conveying and holding mechanism, and avoiding damage to the battery caused by different forces. Similarly, the smooth connection between the conveying and holding mechanism and the centering and welding fixing mechanism also allows the battery to be in a restricted state throughout the assembly process. Its position, orientation, etc. are all under precise control, which is convenient for performing more operations, with higher coordination and cooperation, and reducing the free state time of the battery, which is also conducive to improving the consistency of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The present invention is described in detail below with reference to the embodiments and accompanying drawings, wherein:

[0045] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0046] Figure 2 This is a schematic diagram of the explosion structure of the battery fixture;

[0047] Figure 3 yes Figure 2 A partial enlarged view of the

[0048] Figure 4 It is a structural diagram of the shell conveying line;

[0049] Figure 5 It is a schematic diagram of the structure of the shell entry tooling and the shell entry guide rail;

[0050] Figure 6 It is an isometric view of the shell entry tooling;

[0051] Figure 7 It is the axial view of the shell entry tooling elevation;

[0052] Figure 8 It is a structural diagram of the welding conveyor line;

[0053] Fig. 9It is a schematic diagram of the structure between the welding tooling and the welding guide rail;

[0054] Fig.10 It is an isometric view of the welding fixture and welding guide rail;

[0055] Fig.11 It is the overall structural diagram of the press-fitting conveyor line;

[0056] Fig.12 It is a partial structural diagram of the press-fitting conveyor line;

[0057] Fig.13 It is a structural schematic diagram of the clamping tooling.

[0058] 10. fixture conveyor line; 11. battery fixture; 111. mounting seat; 12. top cover; 13. aluminum shell; 14. battery cell; 15. conveying and holding mechanism; 16. clamping and limiting mounting frame; 17. clamping and limiting assembly; 171. clamping and limiting bidirectional screw rod; 172. power mechanism; 173. clamping and limiting member; 1731. clamping claw; 1732. matching sleeve; 1733. limiting groove; 174. limiting sleeve; 1741. limiting strip;

[0059] 20. Shell feeding conveyor line; 201. Shell feeding guide rail; 202. First horizontal section; 203. Second horizontal section; 204. First transition section; 2041. First downward inclined section; 2042. Third horizontal section; 2043. Second downward inclined section; 205. Second transition section; 21. Shell feeding tooling; 22. Cell clamping and alignment mechanism; 23. Aluminum shell clamping and alignment mechanism; 24. Driving mechanism; 25. Guide mechanism; 251. Fixed bracket; 252. Movable bracket; 253. First guide assembly; 254. Second guide assembly; 26. Shell feeding mechanism; 261. Shell feeding motor; 262. Suction nozzle; 27. Shell feeding pulley; 28. Sleeve; 29. ​​Pull rod; 291. Support wheel;

[0060] 30. Press-fitting conveyor line; 31. Press-fitting tool; 32. Clamping tool; 321. Lifting motor; 322. Mounting frame; 33. Synchronous driving member; 34. Press-fitting member; 35. Lifting assembly; 36. First clamping assembly; 361. First driving member; 362. First clamping member; 37. Second clamping assembly; 371. Second driving member; 372. Second clamping member; 38. Third clamping assembly; 381. Third driving member; 382. Third clamping member; 39. Flipping motor;

[0061] 40. Welding conveyor line; 41. Welding tooling; 42. Protective cover; 43. Lifting motor; 44. Support claw; 45. Fixed frame; 46. Movable frame; 47. Welding guide rail; 471. First welding horizontal section; 472. Second welding horizontal section; 473. First welding inclined section; 48. Welding head mechanism;

[0062] 50. Shell entry section; 51. Press-fitting section; 52. Welding section; 53. Battery. DETAILED DESCRIPTION

[0063] Lithium battery assembly production line, such as Figure 1 As shown, it includes a jig conveyor line 10, a shell entry conveyor line 20 and a welding conveyor line 40.

[0064] Among them, Figure 1 As shown, a battery jig 11 is provided on the jig conveyor line 10, and the battery jig 11 is driven to move along the jig conveyor line 10; a shell inserting tool 21 is provided on the shell inserting tool 20, an aluminum shell 13 is fixed in the shell inserting tool 21, and the shell inserting tool 21 is driven to move along the shell inserting conveyor line 20; Figure 8 As shown, a welding tool 41 is provided on the welding conveyor line 40 , and the welding tool 41 is driven to move along the welding conveyor line 40 .

[0065] Since in the prior art, the battery is mostly in a free state during the assembly process, it is necessary to go through complicated positioning and clamping steps at each station, which seriously restricts the production efficiency and easily damages the battery. Therefore, in this embodiment, a conveying and holding mechanism 15 is provided on the battery fixture 11, and the conveying and holding mechanism 15 positions and clamps the battery in the first stroke of performing the conveying action; the shell insertion tool 21 includes a centering part, and the centering part positions and clamps the battery in the second stroke of the shell insertion tool 21 performing the shell insertion action; the welding tool 41 includes a welding fixing mechanism and a welding head mechanism 48, and the welding fixing mechanism positions and clamps the battery in the third stroke of the welding head mechanism 48 performing the welding action;

[0066] The shell inserting tool 21 and the welding tool 41 are both located on the conveying path of the jig conveyor line 10 , and the first stroke, the second stroke and the third stroke together constitute the assembly processing stroke of the battery on the jig conveyor line 10 .

[0067] Since the conveying and holding mechanism 15, the centering part and the welding fixing mechanism are provided, the restricted state can be maintained in the entire battery assembly process, reducing the free state of the battery, making the position and angle of the battery within a controllable range, reducing the time required for operations such as positioning and clamping in each process, and improving the production efficiency of the entire line.

[0068] In one embodiment, Figure 2-3As shown, the battery fixture 11 is provided with a mounting seat 111 for placing the top cover 12, and the conveying and holding mechanism 15 includes a clamping and limiting mounting frame 16 and a plurality of clamping and limiting components 17, wherein the clamping and limiting mounting frame 16 is located on both sides of the mounting seat 111, and the clamping and limiting components 17 include:

[0069] A clamping and limiting bidirectional screw rod 171, both ends of which are rotatably arranged on the clamping and limiting mounting frame 16, and the clamping and limiting bidirectional screw rod 171 is provided with two sections of opposite threads;

[0070] A power mechanism 172, which is drivingly connected to the clamping and limiting bidirectional screw rod 171;

[0071] Two clamping limit members 173 are slidably connected to the clamping limit mounting frame 16 along the length direction of the clamping limit bidirectional screw rod 171, and are respectively threadedly matched with the two ends of the clamping limit bidirectional screw rod 171. The two clamping limit members 173 are suitable for respectively abutting against the opposite sides of the top cover 12.

[0072] In one embodiment, the clamping and limiting mounting frame 16 is fixed on the battery fixture 11, and the clamping and limiting assembly 17 is provided with two groups, which are used to fix the two ends of the top cover 12 respectively, so as to improve the fixing effect of the top cover 12. Among them, the clamping and limiting assembly 17 also includes a plurality of limiting sleeves 174, and the limiting sleeves 174 are fixed to the clamping and limiting mounting frame 16. The clamping and limiting member 173 includes a clamping claw 1731 and a matching sleeve 1732, and the clamping claw 1731 and the matching sleeve 1732 are integrally formed. The matching sleeve 1732 is sleeved on the clamping and limiting bidirectional screw rod 171, and the matching sleeve 1732 is inserted into the limiting sleeve 174. The outer side of the matching sleeve 1732 is provided with a plurality of limiting grooves 1733, and the inner side of the limiting sleeve 174 is formed with a plurality of limiting strips 1741, which are slidably arranged in the limiting grooves 1733. Therefore, under the cooperation of the limiting strips 1741 and the limiting grooves 1733, the matching sleeve 1732 and the clamping jaws 1731 can only slide along the length direction of the clamping limiting bidirectional screw rod 171. When the clamping limiting bidirectional screw rod 171 rotates, the matching sleeve 1732 can be driven to clamp and move, so as to clamp the top cover 12 through the two clamping jaws 1731, and limit the movement of the top cover 12 relative to the mounting seat 111, so as to facilitate the processing of the semi-finished batteries on the battery fixture 11 at different stations.

[0073] The conveying and holding mechanism 15 also includes a necessary transmission mechanism, which is used to transmit and connect multiple clamping and limiting bidirectional screw rods 171 to ensure that multiple locations of the top cover 12 are synchronously clamped. In one embodiment, the transmission mechanism includes a driving wheel, multiple driven wheels, a transmission belt, a guide wheel and other structures. The power mechanism 172 uses a motor and is connected to the driving wheel power, so that the power is distributed to multiple driven wheels, thereby driving multiple groups of clamping and limiting members 173 to produce action. The specific installation position is not repeated.

[0074] In one embodiment, Figure 1 and 4 -7, the centering part includes a battery core clamping and aligning mechanism 22 for clamping the battery core 14; an aluminum shell clamping and aligning mechanism 23 for clamping the aluminum shell 13 and aligning the aluminum shell 13 with the battery core 14. The shell inserting tool 21 also includes:

[0075] A driving mechanism 24 drives the battery cell clamping and alignment mechanism 22 and the aluminum shell clamping and alignment mechanism 23 to synchronously perform the clamping action; a guiding mechanism 25, the guiding mechanism 25 is used to guide the battery cell clamping and alignment mechanism 22 and the aluminum shell clamping and alignment mechanism 23 to slide so as to drive the battery cell 14 and the aluminum shell 13 to move toward each other; a shell insertion mechanism 26 is used to take the aluminum shell 13 and insert it onto the battery cell 14.

[0076] Among them, the guiding mechanism 25 includes a fixed bracket 251 and a movable bracket 252, and the movable bracket 252 is slidably arranged on the fixed bracket 251 in the direction from the aluminum shell clamping and alignment mechanism 23 to the battery cell clamping and alignment mechanism 22, and the fixed bracket 251 is slidably constrained on the shell entry conveyor line 20; the shell entry mechanism 26 is fixed on the fixed bracket 251; the battery cell clamping and alignment mechanism 22, the aluminum shell clamping and alignment mechanism 23 and the driving mechanism 24 are arranged on the movable bracket 252.

[0077] The movable bracket 252 synchronously drives the aluminum shell clamping and alignment mechanism 23 to slide, and the guide mechanism 25 also includes a first guide component 253 connected to the battery cell clamping and alignment mechanism 22 and a second guide component 254 connected to the aluminum shell clamping and alignment mechanism 23, and the first guide component 253 and the second guide component 254 are slidably connected to cooperate with the battery cell 14 and the aluminum shell 13 to approach each other.

[0078] Therefore, when the aluminum shell clamping alignment mechanism 23 and the battery cell clamping alignment mechanism 22 respectively align and clamp the aluminum shell 13 and the battery cell 14, the aluminum shell 13 is now directly above the battery cell 14, and then the movable bracket 252 synchronously drives the aluminum shell clamping alignment mechanism 23 to slide downward, while the battery cell clamping alignment mechanism 22 maintains the clamping state and does not move, thereby completing the insertion between the aluminum shell 13 and the battery cell 14 and completing the shell insertion action.

[0079] In one embodiment, the lifting drive mechanism 24 of the movable bracket 252 of the shell insertion tool 21 is a cylinder or a motor fixed on the fixed bracket 251 .

[0080] In another embodiment, Figure 1-7 As shown, the shell entry conveyor line 20 is a magnetic drive annular line, which includes a magnetic drive stator, a magnetic driver and an annular shell entry guide rail 201, the shell entry guide rail 201 includes a first horizontal section 202, a second horizontal section 203 and a first transition section 204 connecting the first horizontal section 202 to the second horizontal section 203, the first horizontal section 202 has a higher level than the second horizontal section 203; the shell entry tooling 21 includes a shell entry pulley 27 installed on the shell entry guide rail 201, the shell entry pulley 27 is connected to the movable bracket 252, and the battery cell 14 is located below the shell entry conveyor line 20 when entering the shell entry section 50, and the battery cell 14 is delivered into the aluminum shell 13 in the second horizontal section 203.

[0081] The first transition section 204 is stepped, and the first transition section 204 includes a first downward sloping section 2041, a third horizontal section 2042 and a second downward sloping section 2043 connected in sequence. In the first downward sloping section 2041, the aluminum shell 13 and the battery cell 14 are aligned vertically. In the third horizontal section 2042, the battery cell clamping alignment mechanism 22 and the aluminum shell clamping alignment mechanism 23 simultaneously clamp and position the aluminum shell 13 and the battery cell 14. In the second downward sloping section 2043, the aluminum shell 13 is inserted into the battery cell 14.

[0082] In one embodiment, the fixed bracket 251 is fixedly connected to the magnetic driver, and the movable bracket 252 is vertically slidably connected to the fixed bracket 251, and the movable bracket 252 is rollingly fitted in the shell entry guide rail 201 through the shell entry pulley 27. In this way, under the magnetic drive of the magnetic drive stator, the magnetic driver is driven to slide and flow along the bottom of the annular shell entry guide rail 201, and drives the movable bracket to also make a circular motion.

[0083] Among them, when the shell entering tooling 21 moves to the shell entering section 50, that is, a section parallel to the jig conveyor line 10, at this time, the battery jig 11 is located directly below the shell entering tooling 21, and the aluminum shell 13 is pre-adsorbed on the shell entering mechanism 26, and the shell entering mechanism 26 includes a shell entering motor 261 and a suction nozzle 262 fixed on the fixed bracket 251, that is, the aluminum shell 13 is adsorbed on one or more groups of suction nozzles 262, and at this time, the shell entering pulley 27 of the movable bracket 252 is located in the first horizontal section 202.

[0084] As the magnetic driver continues to move, the shell entry pulley 27 enters the first transition section 204 and first enters the first downward inclined section 2041. At this time, the entire movable bracket 252 descends the first displacement, and then the shell entry pulley 27 enters the third horizontal section 2042. In this first displacement, the aluminum shell clamping alignment mechanism 23 and the battery cell clamping alignment mechanism 22 are synchronously descended with the movable bracket 252, and are respectively located on both sides of the aluminum shell 13 and the battery cell 14. In the third horizontal section 2042, the driving mechanism 24 is started, driving the aluminum shell clamping alignment mechanism 23 and the battery cell clamping alignment mechanism 22 to move horizontally synchronously, aligning and clamping the aluminum shell 13 and the battery cell 14, and preparing for precise alignment for subsequent shell entry.

[0085] The magnetic driver drives the shell entry pulley 27 to move from the third horizontal section 2042 to the second lower inclined section 2043. At this time, the movable bracket 252 moves downward by the second displacement, and the shell entry motor 261 also drives the suction nozzle 262 to move downward by the second displacement. However, since there is a sliding fit between the first guide component 253 and the second guide component 254 between the aluminum shell clamping alignment mechanism 23 and the battery cell clamping alignment mechanism 22, the descent of the movable bracket 252 will only drive the aluminum shell clamping alignment mechanism 23 to descend synchronously, while the battery cell clamping alignment mechanism 22 maintains the clamping state of the battery cell 14 without movement. In the second displacement, a part of the aluminum shell 13 is inserted into the battery cell 14, that is, between the aluminum shell 13 and the battery cell 14, and the pre-shelling operation is completed. The position between the two is relatively clear, meeting the requirements of subsequent shell entry and press-fitting.

[0086] After the shell entry pulley 27 is separated from the second downward inclined section 2043, it will enter the second horizontal section 203. At this time, the driving mechanism 24 releases the power to the aluminum shell clamping alignment mechanism 23 and the battery core clamping alignment mechanism 22, so that the aluminum shell clamping alignment mechanism 23 and the battery core clamping alignment mechanism 22 are reset and the aluminum shell 13 and the battery core 14 are released. At this time, the shell entry motor 261 is started, and the suction nozzle 262 pushes the aluminum shell 13 to continue to descend until the aluminum shell 13 and the battery core 14 are completely shelled. Subsequently, the shell entry pulley 27 enters the second transition section 205 that is inclined upward, that is, it drives the entire movable bracket 252 from the second horizontal section 203 to the other end of the first horizontal section 202, and in the second transition section 205, the entire movable bracket 252 is continuously lifted, so that the aluminum shell clamping alignment mechanism 23 and the battery core clamping alignment mechanism 22 are finally separated from the battery core 14 and the aluminum shell 13 in the vertical direction. Until this time, the shell inserting tool 21 and the battery jig 11 have both moved to the end point of the shell inserting section 50 , and then the shell inserting tool 21 circulates back in the first horizontal section 202 , while the battery jig continues to flow forward along the jig conveying line 10 .

[0087] It should be noted that, in the above embodiment, when sliding occurs between the aluminum shell clamping alignment mechanism 23 and the battery cell clamping alignment mechanism 22, the battery cell clamping alignment mechanism 22 remains stationary, that is, only the aluminum shell clamping alignment mechanism 23 is driven by the movable bracket 252 to move downward to complete the pre-shelling operation. In this embodiment, the battery cell clamping alignment mechanism 22 will not be driven downward synchronously, so that no wear will be caused on the outer surface of the battery cell 14, which is beneficial to maintaining the quality of the battery cell 14.

[0088] As for how the battery cell clamping and aligning mechanism 22 is kept fixed, in one embodiment, it can rely solely on the static friction generated by its clamping of the battery cell 14; in another embodiment, a fixed sleeve 28 can be provided on the fixed bracket 251, and a pull rod 29 is provided in the sleeve 28 for sliding limit, and a support wheel 291 is provided at the bottom of the pull rod 29, and the end of the battery cell clamping and aligning mechanism 22 away from the battery cell 14 is slidably supported on the support wheel 291. The pull rod 29 and the support wheel 291 are provided so that the battery cell clamping and aligning mechanism 22 can be relatively stable when opening and closing in the horizontal direction, and at the same time, after the battery cell clamping and aligning mechanism 22 has undergone the first displacement, the pull rod 29 will pull the battery cell clamping and aligning mechanism 22 so that it can no longer descend, so that in the subsequent second displacement of the movable bracket 252, the battery cell clamping and aligning mechanism 22 will not continue to descend.

[0089] In one embodiment, the aluminum shell clamping and alignment mechanism 23 includes a pair of aluminum shell clamping plates; the battery cell clamping and alignment mechanism 22 includes a pair of battery cell clamping parts. The specific shapes, materials and even specific structures of the two can be designed and modified according to the actual requirements of the battery cell 14 and the aluminum shell 13, as long as the effect of clamping and positioning the battery cell and the aluminum shell can be achieved.

[0090] In one embodiment, Figure 4-7 As shown, the shell inserting tooling 21 is provided with two pairs of aluminum shell clamping and alignment mechanisms 23 and two pairs of battery cell clamping and alignment mechanisms 22, a total of four pairs of clamping and alignment mechanisms, which are respectively located around the battery cell 14 and the aluminum shell 13, so that the battery cell 14 and the aluminum shell 13 can be centered not only left to right but also front to back. Of course, in this embodiment, four driving mechanisms 24 need to be provided, that is, each driving mechanism 24 separately drives an aluminum shell clamping and alignment mechanism 23 and a battery cell clamping and alignment mechanism 22 on the same side and distributed up and down.

[0091] In one embodiment, Figure 1 and 8-10, the welding tool 41 includes a welding fixing mechanism, which includes a protective cover 42, a supporting claw 44, and a lifting motor 43. The supporting claw is located below the battery cell, and a space for accommodating the battery cell is formed between the supporting claw and the protective cover. The protective cover 42 is used to cover the non-welding area on the top cover 12, and the lifting motor 43 brings the protective cover 42 and the top cover 12 on the battery cell 14 closer to each other.

[0092] In one embodiment, the lifting motor 43 is connected to the supporting claw 44. When the lifting motor 43 drives the supporting claw 44 to rise, the supporting claw 44 lifts the battery cell 14 until it is tightly pressed against the protective cover 42. At this time, the protective cover 42 covers the top cover 12 on the battery cell 14, leaving only a circle of gap between the top cover 12 and the aluminum shell 13.

[0093] Specifically, in this embodiment, the welding tool 41 includes a fixed frame 45 and a movable frame 46, the fixed frame 45 is slidably limited on the welding conveyor line 40, and the movable frame 46 is slidably connected to the fixed frame 45, and when the movable frame 46 slides in the direction close to the battery cell 14, the supporting claw 44 is inserted under the battery cell 14.

[0094] The welding conveyor line 40 is a magnetic drive ring line, such as Figure 1 and 8 -10, it includes a magnetic drive stator, a magnetic driver and an annular welding guide rail 47, and the fixed frame 45 is fixedly connected to the magnetic driver and performs an annular rotational motion under the drive of the magnetic drive stator. The welding guide rail 47 includes a first welding horizontal section 471, a second welding horizontal section 472, and a first welding inclined section 473 connecting the first welding horizontal section 471 and the second welding horizontal section 472. The movable frame 46 slides toward the battery cell 14 in the first welding inclined section 473, that is, the first welding horizontal section 471 and the second welding horizontal section 472 are two sections of guide rails on the same horizontal plane, and the second welding horizontal section 472 is closer to the jig conveyor line 10, and the second welding horizontal section 472 is also in the welding section 52. The movable frame 46 rolls in the welding guide rail 47 through the guide wheel, and when the guide wheel is located in the first welding horizontal section 471, the movable frame 46 and the supporting claw 44 are in a state away from the jig conveyor line 10, and when the guide wheel is located in the second welding horizontal section 472, the movable frame 46 and the supporting claw 44 are in a state close to the jig conveyor line 10, and the supporting claw 44 extends into the bottom of the battery 53.

[0095] In this embodiment, a welding head mechanism 48 is also fixed on the welding section 52 of the jig conveyor line 10. The welding head mechanism 48 is opposite to the welding section 52. When the battery jig 11 transports the battery 53 passing through the welding head mechanism 48, the welding head mechanism 48 performs a welding action to weld and fix the top cover 12 and the aluminum shell 13.

[0096] In one embodiment, the welding head mechanism 48 uses a laser welding head and a laser flying welding technology, so as to improve the accuracy of welding in the moving state of the battery 53 and ensure that the welding quality meets the requirements. Moreover, in one embodiment, the welding head mechanism 48 has multiple groups, such as two welding head lasers distributed front and back for welding the long sides, that is, respectively welding the long sides of the left and right sides of the battery 53, and a pair of welding head mechanisms 48 for welding the short sides are installed at the downstream station, and the two short sides on both sides of the battery 53 are welded at the same time, so as to complete the welding between the battery cell 14 and the top cover 12.

[0097] In this embodiment, the protective cover 42 cooperates with the supporting claws 44 and the lifting motor 43 to clamp the entire battery 53, which is beneficial to ensuring the quality of welding, and the supporting claws 44 lift the entire battery 53 from the battery fixture 11. At this time, there is no longer any power transmission influence between the battery 53 and the battery fixture 11, that is, the transportation of the battery 53 completely depends on the advancement of the welding tool 41. Therefore, when the welding head mechanism 48 performs welding, it only needs to control the movement between the welding trajectory and the welding tool 41 to keep it synchronized, and there is no need to consider the movement speed of the battery fixture 11. This greatly simplifies the control difficulty during welding and is beneficial to improving the welding quality.

[0098] In one embodiment, the welding head mechanism 48 also includes a welding head conveyor line, which also adopts a magnetic drive ring line. The welding head mechanism 48 is fixedly mounted on the magnetic drive of the welding head conveyor line and can flow along the ring guide rail. When the welding head mechanism 48 enters the welding section 52, the movement speed of the welding head mechanism 48 is also the same as that of the transport fixture, so that the welding head mechanism 48 and the battery 53 also maintain a relatively static state, which is convenient for welding.

[0099] In one embodiment, Figure 1 As shown, there is a shell entry section 50 parallel to each other between the jig conveyor line 10 and the shell entry conveyor line 20, and the battery jig 11 and the shell entry tool 21 are positioned relative to each other and move at the same speed and in the same direction when entering the shell entry section 50; there is a welding section 52 parallel to each other between the jig conveyor line 10 and the welding conveyor line 40, and the battery jig 11 and the welding tool 41 are positioned relative to each other and move at the same speed and in the same direction when entering the welding section 52.

[0100] Since in the shell entry section 50, the battery cell 14 fixed in the battery fixture 11 and the shell entry tooling 21 have the same speed and move in the same direction, a relatively static state is formed between the two. At this time, the shell entry tooling 21 performs the shell entry action on the aluminum shell 13 and the battery cell 14, which will not be affected by the continuous movement of the battery fixture 11. The aluminum shell 13 and the battery cell 14 can be smoothly fitted together, and no serious wear will occur between the two. Similarly, since in the welding section 52, the battery 53 fixed in the distance and the welding tooling 41 have the same speed and move in the same direction, a relatively static state is also formed between the two. At this time, the welding tooling 41 clamps and positions the battery 53, which is convenient for the welding head mechanism 48 to perform welding operations, and will not be affected by the continuous movement of the battery fixture 11.

[0101] In one embodiment, Figure 1 and 11 -13, the dynamic assembly system of the power battery 53 also includes a press-fitting conveyor line 30 and a press-fitting tool 31. The press-fitting conveyor line 30 is provided with a clamping tool 32. The clamping tool 32 is driven to slide on the press-fitting conveyor line 30, and there are press-fitting sections 51 parallel to each other between the press-fitting conveyor line 30 and the jig conveyor line 10. When the battery jig 11 and the clamping tool 32 enter the press-fitting section 51, they are in relative positions and move at the same speed and in the same direction.

[0102] The press-fitting conveyor line 30 and the press-fitting tool 31 are located downstream of the shell-entering conveyor line 20 and upstream of the welding conveyor line 40, that is, the battery cell 14 and the aluminum shell 13 have only completed the shell-entering action at the shell-entering conveyor line 20, and the aluminum shell 13, the battery cell 14 and the top cover 12 have not been completely fastened, and are still in a relatively loose state, so it is necessary to complete the fastening and pressing between the aluminum shell 13 and the battery cell 14 at the press-fitting conveyor line 30 to provide the operating premise for subsequent welding. It is located between the shell-entering tool and the welding tool, and is located on the conveying path of the jig conveyor line. The clamping tool positions and clamps the battery in the fourth stroke of the press-fitting tool performing the press-fitting action, that is, the first stroke, the second stroke, the third stroke and the fourth stroke together constitute the assembly processing stroke of the battery on the jig conveyor line 10.

[0103] The pressing tool 31 includes a synchronous driving part 33 and a pressing part 34, wherein the pressing part 34 has a pressing surface for pressing the aluminum shell 13, and the synchronous driving part 33 is used to drive the pressing part 34 to move so that the pressing surface moves at the conveying speed of the battery fixture 11; and the pressing tool 31 also includes a lifting component 35, which is used to drive the synchronous component to reciprocate in a direction perpendicular to the direction of the processing speed, that is, to allow the pressing part 34 to be lifted and lowered.

[0104] In one embodiment, Figure 11-13As shown, the pressing part 34 adopts multiple rotating rollers and synchronous belts, and the synchronous driving part 33 adopts a motor and is connected to one of the rotating rollers, thereby driving the synchronous belt to rotate at the flow speed of the battery fixture 11, and the outer surface of the synchronous belt is the pressing surface. Since the pressing surface has the same transportation speed as the battery cell 14 and the aluminum shell 13, a relatively static state is formed between the two. At this time, the lifting component 35 drives the pressing part 34 to press down until the aluminum shell 13 is completely buckled into the battery cell 14 and the bottom of the top cover 12 to complete the pressing action. During the whole process, the battery 53 does not need to stop, and no wear will be caused to the upper surface of the aluminum shell 13.

[0105] In one embodiment, the pressing member 34 may also be a roller structure with a larger diameter, which rotates under the drive of the synchronous driving member 33 and performs a downward pressing action under the drive of the lifting assembly 35 .

[0106] The lifting assembly 35 may be a pneumatic cylinder, an electric cylinder, a linear motor, a cam mechanism, or the like.

[0107] Since the battery cell 14 and the aluminum shell 13 have completed the shelling action in the shelling conveyor line 20, the clamping tool 32 plays the role of clamping the battery cell 14 and the aluminum shell 13 to position and maintain the relative position, which can not only ensure the direct pressing down of the pressing tool 31 and avoid misalignment during pressing down, but also continue to maintain the positional relationship between the battery cell 14 and the aluminum shell 13 after the pressing is completed, prevent the aluminum shell 13 from rebounding, and ensure the quality of subsequent welding.

[0108] In one embodiment, Figure 11-13 As shown, the clamping fixture 32 includes:

[0109] The first clamping assembly 36 comprises a first driving member 361 and a first clamping member 362, wherein the first driving member 361 is used to drive the first clamping member 362 to open and close along a first straight line direction;

[0110] The second clamping assembly 37 includes a second driving member 371, namely a second clamping member 372, which is connected to the first clamping member and is used to drive the second clamping member 372 to open and close along a second straight line direction perpendicular to the first straight line direction;

[0111] The third clamping assembly 38 includes a third driving member 381 and a third clamping member 382. The third driving member 381 is connected to the second clamping member 372 and is used to drive the third clamping member 382 to open and close along a third straight line direction. The third straight line direction, the first straight line direction and the second straight line direction are perpendicular to each other.

[0112] In one embodiment, the first driving member 361, the second driving member 371 and the third driving member 381 are all clamping cylinders; the first clamping member 362, the second clamping member 372 and the third clamping member 382 are all a pair of clamping jaws. In this way, the clamping directions of the three pairs of clamping jaws are perpendicular to each other, and the battery cell 14 and the aluminum shell 13 can be centered and clamped in three dimensions, and further contracted after the press-fitting is completed to maintain the press-fitting state.

[0113] In one embodiment, the third clamping member 382 is a pair of vertically arranged claws, which are used to clamp the battery cell 14, the top cover 12 and the aluminum shell 13 in the vertical direction, which can facilitate press-fitting and continue to maintain the pressed state after the press-fitting is completed; the second clamping member 372 is a pair of claws arranged along the conveying direction perpendicular to the battery fixture 11, which can center and clamp the battery 53 as a whole in the short side direction of the battery cell 14; the first clamping member 362 is a pair of claws arranged along the conveying direction of the battery fixture 11, which can center and clamp the battery 53 as a whole in the long side direction of the battery cell 14. Through the arrangement of these three pairs of clamping members, the battery 53 as a whole can ensure the accuracy of the position after entering the press-fitting station from the shell entry station. At the same time, the three driving members can also control the opening and closing of the three clamping members respectively, which is convenient for the connection and separation between the clamping fixture 32 and the battery 53.

[0114] Since the press-fitting conveyor line 30 is also set up with a magnetic drive annular line, the clamping tool 32 includes a mounting frame 322, and the mounting frame 322 is fixed to the magnetic drive of the magnetic drive annular line. Under the drive of the magnetic drive stator, the magnetic drive drives the mounting frame 322 to slide and flow along the annular guide rail. A lifting motor 321 is also fixed on the mounting frame 322, and the first driving member 361 and the first clamping member 362 are fixedly connected, and the first driving member 361 is vertically slidably matched on the mounting frame 322, and the movable end of the lifting motor 321 is fixedly connected to the first driving member 361, so that under the drive of the lifting motor 321, the first driving member 361 and the first clamping member 362 can be lifted and slid in the vertical direction.

[0115] The second driving member 371 is fixedly connected to the second clamping member 372, and the second driving member 371 is fixedly installed on a clamping claw of the first clamping member 362, that is, a pair of second clamping members 372 are installed on the first clamping member 362, and as the first clamping member 362 opens and closes, the pair of second clamping members 372 approach or move away from each other; in addition, the third driving member 381 is fixedly connected to the third clamping member 382, ​​and the third driving member 381 is fixedly installed on a clamping claw of the second clamping member 372, that is, a pair of third clamping members 382 are installed on each second clamping member 372. Therefore, in this embodiment, the number of the first clamping member 362 is one, which specifically includes one clamping claw cylinder and a pair of clamping claws; the number of the second clamping members 372 is two, which specifically includes two clamping claw cylinders and two pairs of clamping claws; the number of the third clamping members 382 is four, which specifically includes four clamping claw cylinders and four pairs of clamping claws. Driven by the lifting motor 321, all driving parts and all clamping parts are lifted and lowered synchronously, so that the clamping tool 32 can be inserted into the aluminum shell 13 of the battery 53 from top to bottom for subsequent multi-dimensional clamping and limiting.

[0116] In one embodiment, since the top cover 12 is located at the bottom during shell insertion and press assembly, the battery cell 14 is fixed on the top cover 12, and the aluminum shell 13 is inserted into the battery cell 14 and the top cover 12 from above, the entire battery 53 needs to be flipped over during subsequent welding, otherwise the welding head mechanism 48 will find it difficult to weld the joint between the top cover 12 and the aluminum shell 13, and therefore a flipping mechanism is also provided on the clamping tool 32.

[0117] In one embodiment, the pair of second driving members 371 are both rotatably connected to the two clamping claws of the first clamping member 362 and are arranged opposite to each other, and the flipping mechanism includes a flipping motor 39, which is connected to one of the pair of second driving members 371 to drive the second driving member 371 to drive the second clamping member 372 fixed thereon to rotate. Of course, the flipping motor 39 can be connected to the second driving member 371 through a synchronous belt or in a direct drive form.

[0118] Since the two second clamping members 372 are respectively clamped at the two ends of the battery 53 and maintain a clamped state, and the two second clamping members 372 are rotatably connected to the clamping claws of the first clamping member 362 through the second driving member 371, when the flipping motor 39 is started, driving one of the second clamping members 372 to rotate, the battery cell 14 flips accordingly and drives the other second clamping member 372 to rotate synchronously, and after the flipping is completed, the flipping motor 39 stops, and the top cover 12 is located at the upper end, which is convenient for subsequent welding operations.

[0119] In one embodiment, considering that only one second driving member 371 is connected to the flip motor 39, and the other second driving member 371 is in a free state and can rotate to any angle relative to the first clamping member 362, it is necessary to constrain the second driving member 371 in the rotation direction to ensure that the two second driving members 371 can be synchronously flipped and positioned to avoid misalignment and ensure that the clamping tool 32 can be smoothly inserted into the aluminum shell 13 of the battery 53. Therefore, a braking structure is also provided on a clamping claw of the first clamping member 362, which limits the second driving member 371 in the free state in the circumferential direction, and contacts the limit constraint in time when the flipping action needs to be performed.

[0120] Specifically, the braking structure can be a clutch brake, which realizes the tightening or loosening of the second driving member 371 by disconnecting or connecting the power of the clutch; the braking structure can also be a tongue and pin structure, which is equipped with multiple pins according to the multiple positions of the second driving member 371, and the tongue is fixed on the first clamping member 362, so as to restrict the free rotation of the second driving member 371 by plug-in fixation; of course, the braking structure can also be more structures that can brake the second driving member 371, and similar settings in the prior art can be referred to.

[0121] In one embodiment, a lithium battery assembly method is disclosed, which is applied to a lithium battery assembly production line, wherein the production line includes a jig conveyor line 10, a shell insertion tool 21, and a welding tool 41. The assembly method includes: conveying the battery jig 11 along the jig conveyor line 10 to move the first conveying stroke to the shell insertion tool 21, and maintaining the positioning and clamping of the top cover and / or the battery cell on the battery jig during the first conveying stroke; the shell insertion tool 21 positions and clamps the battery, and then releases the positioning and clamping after performing the shell insertion action;

[0122] The battery jig 11 moves along the jig conveyor line 10 through a second conveying stroke to the welding tool 41, and maintains the positioning and clamping of the top cover and / or aluminum shell on the battery jig during the second conveying stroke; the welding tool 41 positions and clamps the battery, and then releases the positioning and clamping after performing the welding action.

[0123] When the shell inserting tool 21 positions and clamps the battery, the battery fixture 11 releases the positioning and clamping of the battery synchronously or with delay; when the shell inserting tool 21 releases the positioning and clamping of the battery, the battery fixture 11 positions and clamps the battery synchronously or in advance; and / or,

[0124] When the welding tool 41 positions and clamps the battery, the battery fixture 11 releases the positioning and clamping of the battery synchronously or with delay; when the welding tool 41 releases the positioning and clamping of the battery, the battery fixture 11 positions and clamps the battery synchronously or in advance.

[0125] The assembly method further includes, after executing the shell insertion action and before entering the welding tool, that the battery jig 11 moves along the jig conveyor line 10 for a third conveying stroke to the clamping tool 32, and maintains the positioning and clamping of the top cover and / or aluminum shell on the battery jig during the third conveying stroke; the clamping tool 32 positions and clamps the battery, and then the clamping tool releases the positioning and clamping after the pressing tool 31 performs the pressing action.

[0126] Through the above-mentioned system or method, during the assembly process of lithium batteries, whether it is transportation, shelling or welding, different mechanisms are used to limit the batteries, ensuring that the entire battery assembly process has a high degree of stability and uniformity, reducing the tedious alignment process after transportation between different workstations, and being able to stably maintain various states in the battery assembly, which is conducive to ensuring the quality of the final product.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention. Moreover, in other embodiments, the battery assembly system may also include more stations and related equipment, such as a feeding station, a core assembly station, a glue sticking station, a tab folding station, and a pre-welding station, which can be set on a jig conveyor line or an additional line according to actual process and product requirements, and should be included in the concept of dynamic assembly of the present invention.

Claims

1. Lithium battery assembly production line, characterized in that: include, A jig conveyor line, on which a battery jig is conveyed, wherein the battery jig is provided with a conveying and holding mechanism, and the conveying and holding mechanism positions and clamps the battery in a first stroke of the conveying action; A shell inserting tool, comprising a centering part, a driving mechanism, a shell inserting pulley, a guiding mechanism including a fixed bracket and a movable bracket, and a shell inserting mechanism for taking the aluminum shell and inserting it onto the battery core, wherein the centering part positions and clamps the battery in the second stroke of the shell inserting tool performing the shell inserting action, and the centering part comprises a battery core clamping and aligning mechanism for clamping the battery core, and an aluminum shell clamping and aligning mechanism for clamping the aluminum shell and aligning the aluminum shell with the battery core; the driving mechanism drives the battery core clamping and aligning mechanism and the aluminum shell clamping and aligning mechanism to synchronously perform the clamping action; the movable bracket is slidably arranged on the fixed bracket in the direction from the aluminum shell clamping and aligning mechanism to the battery core clamping and aligning mechanism, and the fixed bracket is slidably constrained on the shell inserting conveyor line; the shell inserting mechanism is fixed on the fixed bracket; the battery core clamping and aligning mechanism, the aluminum shell clamping and aligning mechanism and the driving mechanism are arranged on the movable bracket; A welding tool, comprising a welding fixing mechanism, a welding head mechanism, a fixed frame and a movable frame, wherein the welding fixing mechanism positions and clamps the battery in the third stroke when the welding head mechanism performs the welding action, the welding fixing mechanism comprises a protective cover, a supporting claw and a lifting motor, the supporting claw is located below the battery cell, and a space for accommodating the battery cell is formed between the supporting claw and the protective cover, and the lifting motor drives the protective cover and / or the supporting claw to approach each other to fix the battery cell; the sliding limit of the fixed frame is located on the welding conveyor line, and the movable frame is slidably connected to the fixed frame; the supporting claw is fixed to the movable frame, and when the movable frame slides in a direction close to the battery cell, the supporting claw is inserted under the battery cell; the shell insertion tool and the welding tool are both located on the conveying path of the jig conveyor line, and the first stroke, the second stroke and the third stroke together constitute the assembly processing stroke of the battery on the jig conveyor line; A shell entry conveyor line, comprising a shell entry guide rail, wherein the shell entry guide rail comprises a first horizontal section, a first transition section, a second horizontal section, and a second transition section connected in sequence, wherein the first transition section comprises a first downwardly inclined section, a third horizontal section, and a second downwardly inclined section connected in sequence; A welding conveyor line comprises a welding guide rail, wherein the welding guide rail comprises a first welding horizontal section, a first welding inclined section, and a second welding horizontal section which are connected in sequence.

2. The lithium battery assembly production line according to claim 1, characterized in that: The battery fixture is provided with a mounting seat for placing the top cover, the conveying and holding mechanism includes a clamping and limiting mounting frame and a plurality of clamping and limiting components, the clamping and limiting mounting frame is located on both sides of the mounting seat, and the clamping and limiting components include: A clamping and limiting bidirectional screw rod, both ends of which are rotatably arranged on the clamping and limiting mounting frame, and the clamping and limiting bidirectional screw rod is provided with two sections of reverse threads; A power mechanism, which is drivingly connected to the clamping and limiting bidirectional screw rod; Two clamping limit members are slidably connected to the clamping limit mounting frame along the length direction of the clamping limit bidirectional screw rod, and are respectively threadedly matched with the two ends of the clamping limit bidirectional screw rod. The two clamping limit members are suitable for respectively abutting against the opposite sides of the top cover.

3. The lithium battery assembly production line according to claim 1, characterized in that: The movable bracket is provided with a pair of slide rails, the aluminum shell clamping alignment mechanism includes a pair of aluminum shell clamping plates, each of the aluminum shell clamping plates is correspondingly matched on one of the slide rails, and the output end of the driving mechanism is connected to the aluminum shell clamping plate; The battery cell clamping and alignment mechanism comprises a pair of battery cell clamping members, and each battery cell clamping member is connected to one of the aluminum shell clamping plates.

4. The lithium battery assembly production line according to claim 1, characterized in that: It also includes a pressing tool and a clamping tool, which are located between the shell insertion tool and the welding tool and on the conveying path of the jig conveyor line. The clamping tool positions and clamps the battery in the fourth stroke of the pressing tool performing the pressing action.

5. The lithium battery assembly production line according to claim 4, characterized in that: The clamping tool includes: a first clamping assembly, including a first driving member and a first clamping member, the first driving member is used to drive the first clamping member to open and close along a first straight line direction; a second clamping assembly, including a second driving member and a second clamping member, the second driving member is connected to the first clamping member, and is used to drive the second clamping member to open and close along a second straight line direction perpendicular to the first straight line direction; a third clamping assembly, including a third driving member and a third clamping member, the third driving member is connected to the second clamping member, and is used to drive the third clamping member to open and close along a third straight line direction, and the third straight line direction, the first straight line and the second straight line direction are perpendicular to each other.

6. The lithium battery assembly production line according to claim 4, characterized in that: An aluminum shell is fixed in the shell entry tooling and is driven to move along the shell entry conveyor line; there is a shell entry section parallel to each other between the jig conveyor line and the shell entry conveyor line, and when the battery jig and the shell entry tooling enter the shell entry section, they are positioned relative to each other and move at the same speed and in the same direction; the welding tooling is driven to move along the welding conveyor line; there is a welding section parallel to each other between the jig conveyor line and the welding conveyor line, and when the battery jig and the welding tooling enter the welding section, they are positioned relative to each other and move at the same speed and in the same direction; and / or, The production line also includes a press-fitting conveyor line, and the clamping tool is driven to move along the press-fitting conveyor line; there is a press-fitting section parallel to each other between the press-fitting conveyor line and the jig conveyor line, and when the battery jig and the clamping tool enter the press-fitting section, they are positioned relative to each other and move at the same speed and in the same direction.

7. A lithium battery assembly method, applied to a lithium battery assembly production line as claimed in any one of claims 1 to 6, wherein the production line comprises a jig conveyor line, a shell inserting tool and a welding tool, characterized in that: The assembly method comprises: the battery jig moves along the jig conveying line for a first conveying stroke to a shell inserting tool, and in the first conveying stroke, the top cover and / or the battery cell on the battery jig are kept positioned and clamped; the shell inserting tool positions and clamps the battery, and then releases the positioning and clamping after the shell inserting action is performed; The battery jig moves along the jig conveyor line for a second conveying stroke to the welding tooling, and in the second conveying stroke, the top cover and / or aluminum shell on the battery jig is kept positioned and clamped; the welding tooling positions and clamps the battery, and then releases the positioning and clamping after performing the welding action.

8. The lithium battery assembly method according to claim 7, characterized in that: When the shell inserting tool positions and clamps the battery, the battery fixture releases the positioning and clamping of the battery synchronously or with delay; when the shell inserting tool releases the positioning and clamping of the battery, the battery fixture positions and clamps the battery synchronously or in advance; and / or, When the welding tool positions and clamps the battery, the battery fixture releases the positioning and clamping of the battery synchronously or with a delay; when the welding tool releases the positioning and clamping of the battery, the battery fixture positions and clamps the battery synchronously or in advance.

9. The lithium battery assembly method according to claim 7, characterized in that: The assembly method further includes, after executing the shell insertion action and before entering the welding tool, that the battery jig moves along the jig conveyor line for a third conveying stroke to the clamping tool, and maintains the positioning and clamping of the top cover and / or aluminum shell on the battery jig during the third conveying stroke; the clamping tool positions and clamps the battery, and then the clamping tool releases the positioning and clamping after the pressing tool performs the pressing action.

Images