Battery module assembly production line

Abstract

The invention belongs to the technical field of battery production, and discloses a battery module assembly production line. The battery module assembly production line comprises a conveying line, a first transplanting device, a stacking device, a second transplanting device and a shaping device, the conveying line can convey battery cells, the first transplanting device is arranged on one side of the conveying line, and the first transplanting device, the stacking device, the second transplanting device and the shaping device are sequentially arranged; the stacking device can receive the battery cells transplanted by the first transplanting device and can push the battery cell group along the arrangement direction of the plurality of battery cells in the battery cell group, so that all the battery cells in the battery cell group are tightly attached; and the shaping device can receive the battery cell group picked up by the second transplanting device and extrude and shape the battery cell group. The waiting time of the first transplanting device can be greatly shortened, the battery module assembling rhythm is accelerated, meanwhile, the battery module assembling production line can be freely switched between a single-group battery cell assembling mode and a multi-group battery cell assembling mode, and the adaptability of the production line is improved.

Description

Technical Field

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

[0002] The battery module is a key intermediate-level structure in the battery system. The battery module is assembled from multiple battery cells (single cells) in series or parallel, aiming to provide higher voltage and capacity to meet the power requirements of specific applications.

[0003] Existing battery module assembly equipment includes a conveyor line, a stacking robot and an assembly table. The completed single battery cells are first transported one by one to one side of the assembly table through the conveyor line, and the stacking robot picks up the battery cells on the conveyor line one by one and places them on the assembly table in sequence, so that multiple battery cells are neatly arranged in a group. Then, auxiliary tools such as push plates on the assembly table push the multiple battery cells together, so that a group of battery cells are tightly attached together to form the prototype of a battery module. Then, steel belts or binding straps are put on the outside of a group of battery cells, and finally a group of battery cells are welded together to form a battery module.

[0004] In the actual production process, the above-mentioned assembly equipment is relatively time-consuming to shape the battery modules. In addition, some battery modules are assembled from multiple groups of parallel battery cells, which makes the stacking and shaping operations even more time-consuming, resulting in a slower battery module assembly cycle and lower efficiency. Summary of the invention

[0005] The object of the present invention is to provide a battery module assembly production line to adapt to the assembly operations of single-row battery cells and multi-row battery cells, reduce the time consumption of palletizing and shaping operations, and improve the efficiency of battery module assembly.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A battery module assembly production line, the battery module assembly production line comprising a conveyor line and a first transplanting device, the conveyor line can transport battery cells, the first transplanting device is arranged on one side of the conveyor line, the first transplanting device can transplant a plurality of the battery cells at a time, and the battery module assembly production line further comprises:

[0008] A palletizing device, the palletizing device comprising a first palletizing platform, a plurality of palletizing stations being arranged on the first palletizing platform, each of the palletizing stations being capable of receiving a group of the battery cells transplanted by the first transplanting device, a pushing mechanism being arranged on the first palletizing platform, the pushing mechanism being capable of pushing the battery cell group along the arrangement direction of the plurality of battery cells in the battery cell group so that all the battery cells in the battery cell group are closely attached;

[0009] a second transplanting device, which can pick up a plurality of battery cell groups at a time and push the battery cell groups along the distribution direction of the plurality of battery cell groups so that the plurality of battery cell groups are closely attached to each other; and

[0010] A shaping device, wherein the shaping device can receive the battery cell group picked up by the second transplanting device and extrude and shape the battery cell group so that a fixing belt can be sleeved on the outside of the battery cell group.

[0011] Preferably, the palletizing device further comprises:

[0012] A base, the first stacking platform is slidably arranged on the base, a support frame is slidably arranged on the base, and the sliding direction of the support frame is parallel to the sliding direction of the first stacking platform; and

[0013] A second stacking platform, wherein the second stacking platform is disposed on the support frame, and the first stacking platform can slide to the bottom of the second stacking platform;

[0014] The second transplanting device is located at a side of the base away from the second transplanting device, and the first stacking platform and the second stacking platform can dock with the first transplanting device and the second transplanting device respectively.

[0015] Preferably, the pushing mechanism comprises:

[0016] a positioning plate; and

[0017] A push plate is slidably arranged on the first stacking platform, the arrangement direction of the push plate and the positioning plate is parallel to the arrangement direction of the multiple battery cells in the battery cell group, and the sliding direction of the push plate is parallel to the arrangement direction of the push plate and the positioning plate.

[0018] Preferably, the second transplanting device comprises a transplanting mechanism and a clamp, and the clamp comprises:

[0019] a bottom plate connected to the transplanting mechanism; and

[0020] A clamping plate, wherein two clamping plates are arranged on the bottom plate at intervals, and the distance between the two clamping plates can be adjusted along the arrangement direction of the multiple groups of battery cell groups.

[0021] Preferably, the base plate is rotatably connected to the transplanting mechanism, and the rotation axis is perpendicular to the base plate.

[0022] Preferably, the shaping device comprises:

[0023] A shaping platform, the shaping platform being capable of receiving the battery cell group; and

[0024] A shaping mechanism, the shaping mechanism includes a first shaping plate and a second shaping plate, two first shaping plates are arranged on the shaping table at intervals, and the distance between the two first shaping plates is adjustable; two second shaping plates are arranged on the shaping table at intervals, the distribution direction of the two second shaping plates is perpendicular to the distribution direction of the two first shaping plates, and the distance between the two second shaping plates is adjustable, so that the two first shaping plates and the two second shaping plates enclose a space for limiting multiple groups of battery cells.

[0025] Preferably, the shaping device further comprises:

[0026] A conveying mechanism, wherein the conveying mechanism is arranged on the shaping table, and a conveying tray is arranged on the conveying mechanism, and the conveying tray can receive a plurality of groups of the battery cell groups;

[0027] The two first shaping plates are arranged along a conveying direction parallel to the conveying mechanism, and one of the first shaping plates is arranged on the conveying tray.

[0028] Preferably, the battery module assembly production line further comprises a polarity adjustment device, and the polarity adjustment device comprises:

[0029] Base;

[0030] A material taking seat, which is slidably or rotatably arranged on the base, and can be close to or away from the battery core;

[0031] A material picking member, wherein at least one group of the material picking members is arranged on the material picking seat, and at least two of the material picking members are arranged in one group, and the material picking member is rotatably connected to the material picking seat via a rotating shaft, and the axis of the rotating shaft is perpendicular to the plane on which the electrodes are arranged on the battery cell, and the material picking member can pick up the battery cell; and

[0032] A driving mechanism is arranged on the material picking seat, and the driving mechanism can drive some or all of the material picking members in a group of the material picking members to rotate.

[0033] Preferably, the driving mechanism comprises:

[0034] A driving rack, wherein the driving rack is slidably arranged on the material picking seat, the sliding direction of the driving rack is perpendicular to the axial direction of the rotating shaft, the length direction of the driving rack is perpendicular to the axial direction of the rotating shaft, and at least two driving racks are arranged in parallel;

[0035] A first driving member, the first driving member is arranged on the material picking seat, and the first driving member can drive all the driving racks to slide simultaneously;

[0036] A driving gear is provided on the outside of each of the rotating shafts in a sliding sleeve, the driving gear can rotate synchronously with the rotating shaft, and the driving rack is arranged in a one-to-one correspondence with the driving gear; and

[0037] A second driving member is provided for each of the driving gears, and the second driving member is used to drive the driving gear to slide axially along the rotating shaft, so that the driving gear has a first working state of meshing with the driving rack and a second working state of exiting meshing with the driving rack.

[0038] Preferably, the battery module assembly production line further comprises:

[0039] A welding device is configured to weld a plurality of the battery cells to form a battery module.

[0040] Beneficial effects of the present invention:

[0041] The battery module assembly production line of the present invention transplants multiple battery cells at a time through the first transplanting device during operation, and then the multiple groups of battery cells transplanted by the first transplanting device are pushed by the pushing mechanism on the first stacking platform, so that all battery cells in the same battery cell group are close to each other, and then the multiple groups of battery cells are pushed together when the second transplanting device picks up the battery cell group, so that the multiple groups of battery cells are abutted against each other, completing the preliminary shaping of the battery module before welding, and then the multiple groups of battery cells after the preliminary shaping are transferred to the shaping device for extrusion shaping, and are covered with fixing belts to wait for welding.

[0042] Through the above process analysis, it can be seen that the battery module assembly production line of the present invention has the following effects:

[0043] 1. Improve production efficiency: The first transplanting device can transplant multiple battery cells at a time, which improves the efficiency of palletizing. The battery cells can be taken away after being pushed by the pushing mechanism in one direction on the first palletizing platform, which greatly shortens the waiting time of the first transplanting device. The first transplanting device can continue to work in a very short time, speeds up the rhythm of battery module assembly, and improves the efficiency of the operation;

[0044] 2. Improve adaptability: Since the second transplanting device can pick up multiple battery cell groups at a time and push and shape them, the battery module assembly production line can switch freely between single-group battery cell assembly mode and multi-group battery cell assembly mode, which improves the adaptability of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a layout diagram of a battery module assembly production line of the present invention;

[0046] Figure 2 It is one of the structural schematic diagrams of the polarity adjustment device of the present invention;

[0047] Figure 3 This is the second structural schematic diagram of the polarity adjustment device of the present invention;

[0048] Figure 4 It is a structural schematic diagram of the driving mechanism of the present invention;

[0049] Figure 5 is a schematic structural diagram of a first transplanting device of the present invention;

[0050] Figure 6 It is a structural schematic diagram of the palletizing device of the present invention;

[0051] Figure 7 Schematic diagram of the structure of the second transplanting device of the present invention

[0052] Figure 8 It is a structural schematic diagram of the shaping device of the present invention

[0053] Fig. 9 It is a structural schematic diagram of the pole addressing mechanism of the present invention.

[0054] In the figure:

[0055] 100, battery cell; 200, battery cell group;

[0056] 1. Conveyor line; 11. Carrier;

[0057] 2. A first transplanting device;

[0058] 3. Palletizing device; 31. Base; 32. First palletizing platform; 33. Second palletizing platform; 34. Support frame; 35. Pushing mechanism; 351. Positioning plate; 352. Pushing plate; 353. Extrusion plate;

[0059] 4. Second transplanting device; 41. Transplanting mechanism; 42. Clamp; 421. Bottom plate; 422. Clamping plate;

[0060] 5. Shaping device; 51. Shaping table; 52. Shaping mechanism; 521. First shaping plate; 522. Second shaping plate; 53. Conveying mechanism; 531. Conveying tray;

[0061] 6. Welding device; 61. Welding table; 62. Welding mechanism; 63. Pole addressing mechanism; 631. Three-axis motion mechanism; 632. Addressing camera;

[0062] 7. Polarity adjustment device; 71. Base; 72. Material pick-up seat; 721. Mounting plate; 722. Connecting plate; 73. Material pick-up member; 731. Double-head cylinder; 732. Clamping plate; 7321. Positioning groove; 74. Driving mechanism; 741. Driving rack; 7411. Connecting member; 742. First driving member; 743. Driving gear; 744. Second driving member. DETAILED DESCRIPTION

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0064] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0066] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0067] Refer to the following Figures 1 to 9 The battery module assembly production line provided by the present invention is described.

[0068] Reference Figure 1 The battery module assembly production line includes a conveyor line 1, a first transplanting device 2, a stacking device 3, a second transplanting device 4, a shaping device 5 and a welding device 6. The conveyor line 1 can transport the battery cell 100. The first transplanting device 2 is arranged on one side of the conveyor line 1. The stacking device 3, the second transplanting device 4, the shaping device 5 and the welding device 6 are arranged in sequence.

[0069] Reference Figure 2 , exemplarily, the conveyor line 1 in this embodiment is any conveying equipment capable of conveying the battery cells 100, such as a belt conveyor line, a chain conveyor line or a roller conveyor line, etc. The conveyor line 1 in this embodiment is a double-layer belt conveyor line, and the conveyor line 1 has a carrier 11 for positioning the battery cells 100, and the carrier 11 can circulate on the conveyor line 1, that is, when the carrier 11 with the battery cells 100 reaches the loading position of the first transplanting device 2, after waiting for the first transplanting device 2 to transplant the battery cells 100, the carrier 11 can flow back to the loading end of the conveyor line 1 to continue loading the battery cells 100.

[0070] It should be noted that in this embodiment, the battery cells 100 on the carrier 11 are placed horizontally, and the poles of the battery cells 100 are located on a plane facing the conveying line 1 .

[0071] Reference Figure 3 and Figure 4 In order to facilitate the subsequent assembly operations, the multiple battery cells 100 in the battery module are connected in series or in parallel in sequence, and the polarity of the battery cells 100 needs to be detected and adjusted, so that the polarity of the poles of the battery cells 100 on the conveyor line 1 is arranged in a certain order, and can be directly picked up and stacked later. Therefore, a polarity detection device and a polarity adjustment device 7 are sequentially arranged on one side of the conveyor line 1. The polarity adjustment device 7 is located on the downstream side of the polarity detection device. The polarity detection device is used to detect the polarity of the battery cells 100 on the conveyor line 1. The polarity detection device is any device in the prior art that can detect the polarity of the battery cells 100. The specific structure is a prior art and is not the invention point of the present application, so it will not be repeated here.

[0072] Furthermore, the polarity adjustment device 7 includes a base 71, a material picking seat 72, a material picking piece 73 and a driving mechanism 74, the base 71 is connected to one side of the conveyor line 1, the material picking seat 72 is arranged on the base 71, and can be close to the battery cell 100 and away from the battery cell 100; at least one group of material picking pieces 73 are arranged on the material picking seat 72, each material picking piece 73 is rotatably connected to the material picking seat 72 through a rotating shaft, and the material picking piece 73 can pick up the battery cell 100; the driving mechanism 74 is arranged on the material picking seat 72, and the driving mechanism 74 can drive some of the material picking pieces 73 in a group of material picking pieces 73 to rotate or all of the material picking pieces 73 to rotate.

[0073] Exemplarily, the material picking seat 72 is slidably or rotatably arranged on the base 71. The material picking seat 72 in this embodiment is slidably connected to the base 71 in the vertical direction. The material picking seat 72 is located above the conveyor line 1. The sliding of the material picking seat 72 is driven by a linear drive member such as a cylinder, an oil cylinder or an electric cylinder. In this embodiment, a cylinder is used as an example, and a linear guide rail is used to guide and limit the base 71 and the material picking seat 72. When the material picking seat 72 slides downward in the vertical direction, it is convenient for the material picking member 73 to pick up the battery cell 100 on the conveyor line 1.

[0074] It should be noted that, in some other embodiments, the sliding direction of the material picking seat 72 can also be changed to a direction that forms a certain angle with the horizontal plane, such as a direction that forms a 60° angle between the horizontal planes; or, the material picking seat 72 is rotatably connected to the base 71, and the axis of rotation is parallel to the conveying direction of the battery cell 100, so that the material picking seat 72 can be close to the battery cell 100 and away from the battery cell 100.

[0075] Exemplarily, in this embodiment, two groups of material picking members 73 are arranged along the conveying direction of the battery cell 100, and each group of material picking members 73 is provided with two. A mounting plate 721 is arranged on one side of the material picking seat 72, and one mounting plate 721 is arranged corresponding to each group of material picking members 73, that is, in this embodiment, two mounting plates 721 are arranged, and in this embodiment, the mounting plate 721 is arranged parallel to the material picking seat 72, and a connecting plate 722 is connected between the mounting plate 721 and the material picking seat 72, and a plurality of connecting plates 722 are arranged in parallel.

[0076] Each material-retrieving member 73 is rotatably connected to the mounting plate 721 via a rotating shaft (not shown in the figure). Specifically, each material-retrieving member 73 in this embodiment includes a double-headed cylinder 731 and a clamping plate 732. The double-headed cylinder 731 is connected to the rotating shaft, and the rotating shaft rotatably penetrates the mounting plate 721. The axis of the rotating shaft is horizontally arranged and perpendicular to the conveying direction of the battery cell 100, that is, the axis of the rotating shaft is perpendicular to the plane where the electrodes are arranged on the battery cell 100. One clamping plate 732 is connected to each of the two piston rods of the double-headed cylinder 731. The two clamping plates 732 in this embodiment are distributed along a direction parallel to the conveying direction of the battery cell 100, and a positioning groove 7321 is provided on the side where the two clamping plates 732 are close to each other. The positioning groove 7321 can allow the battery cell 100 to be partially embedded.

[0077] Based on the above, when the material picking member 73 clamps the battery cell 100 and rises to a certain height, if the rotating shaft is driven to rotate, the battery cell 100 can be driven to rotate along the axial direction of the rotating shaft. Since the axial direction of the rotating shaft is perpendicular to the plane where the electrodes are located, that is, after the battery cell 100 rotates 180°, the positions of the positive and negative electrodes on the battery cell 100 are interchanged, thereby completing the adjustment of the polarity of the battery cell 100.

[0078] Optionally, in some other embodiments, the picking member 73 may also be a suction cup or a pneumatic clamp, etc., which can pick up the battery cell 100 , without limitation.

[0079] Reference Figure 3 and Figure 4 The driving mechanism 74 includes a driving rack 741, a first driving member 742, a driving gear 743 and a second driving member 744. The driving rack 741 is slidably arranged on the material picking seat 72. The sliding direction of the driving rack 741 is perpendicular to the axial direction of the rotating shaft. The length direction of the driving rack 741 is perpendicular to the axial direction of the rotating shaft. There are at least two driving racks 741 arranged in parallel. This embodiment takes two as an example, and the driving rack 741 in this embodiment slides in the vertical direction.

[0080] Furthermore, the first driving member 742 is arranged on the material picking seat 72, and the first driving member 742 can drive all the driving racks 741 to slide simultaneously. Exemplarily, all the driving racks 741 in this embodiment are connected by a connecting member 7411, and the connecting member 7411 is arranged in a plate shape. The connecting member 7411 is slidably connected to the material picking seat 72, and the connecting member 7411 and the material picking seat 72 are guided and limited by a linear guide rail. The opposite sides of the two driving racks 741 are connected to the connecting member 7411, so that the driving racks 741 are fixedly connected to the connecting plate 722; the first driving member 742 is a cylinder, and the output shaft of the first driving member 742 is connected to the connecting member 7411, that is, the piston rod of the cylinder is connected to the connecting member 7411. When the piston rod of the cylinder is extended or retracted, all the driving racks 741 can be synchronously driven to rotate through the connecting member 7411.

[0081] In some other embodiments, the first driving member 742 may also be a linear driving member such as an oil cylinder or an electric cylinder; and the connecting member 7411 may also be arranged in a strip shape and placed on the top of the driving rack 741. This structure facilitates increasing the number of driving racks 741.

[0082] In addition, a driving gear 743 is provided with a sliding sleeve on the outside of each rotating shaft, and two driving racks 741 are arranged one by one corresponding to the two driving gears 743. The driving gear 743 can rotate synchronously with the rotating shaft. Specifically in this embodiment, the driving gear 743 and the rotating shaft are circumferentially limited by a key, such as a flat key, a spline, etc., so that the driving gear 743 and the rotating shaft can rotate synchronously.

[0083] One second driving member 744 is provided for each driving gear 743, and the second driving member 744 is used to drive the driving gear 743 to slide along the axial direction of the rotating shaft, so that the driving gear 743 has a first working state of meshing with the driving rack 741 and a second working state of exiting the meshing with the driving rack 741. Specifically, in this embodiment, the second driving member 744 is a cylinder, and the output shaft of the second driving member 744 slides through the material taking seat 72 and is rotatably connected to the driving gear 743, that is, the piston rod of the cylinder slides through the material taking seat 72 and is rotatably connected to the driving gear 743.

[0084] Based on the above, when the output shaft of the second driving member 744 is extended or retracted, the gear can be directly driven to slide along the axial direction of the rotating shaft. When the driving gear 743 slides to mesh with the driving rack 741, the driving gear 743 is in the first working state. At this time, when the driving rack 741 slides, the driving gear 743 can be driven to rotate, thereby realizing the flipping of the battery cell 100 and swapping the positions of the positive and negative electrodes on the battery cell 100. When the driving gear 743 slides to exit the meshing with the driving rack 741, the driving gear 743 is in the second working state. At this time, when the driving rack 741 slides, the driving gear 743 does not rotate, and the battery cell 100 maintains the current state, that is, the positions of the positive and negative electrodes on the battery cell 100 remain unchanged.

[0085] It should be noted that the friction force of the rotational connection between the output shaft of the second driving member 744 and the driving gear 743 can overcome the gravity of the battery cell 100 itself, that is, after the driving gear 743 exits the engagement, the rotating shaft will not rotate under the action of the gravity of the battery cell 100, so as to change the posture of the battery cell 100.

[0086] Reference Figure 5 The first transplanting device 2 can transplant multiple battery cells 100 at a time. In this embodiment, the first transplanting device 2 is a manipulator with multiple grippers. In this embodiment, four grippers are used as an example, and the distance between two adjacent clamping plates 732 is adapted to the distance between two adjacent battery cells 100 on the conveyor line 1, that is, the first transplanting device 2 can pick up four battery cells 100 from the conveyor line 1 at a time to improve the efficiency of palletizing. In other embodiments, the manipulator can also be replaced by a multi-axis module.

[0087] Reference Figure 6The stacking device 3 includes a base 31, a first stacking platform 32 and a second stacking platform 33. The base 31 is located on one side of the first transplanting device 2, and the second transplanting device 4 is located on the side of the base 71 away from the second transplanting device 4, that is, the base 31 is located between the first transplanting device 2 and the second transplanting device 4. The first stacking platform 32 is slidably arranged on the base 31, and the sliding direction of the first stacking platform 32 is parallel to the distribution direction of the first transplanting device 2 and the second transplanting device 4. A plurality of stacking stations are arranged on the first stacking platform 32. In this embodiment, four are taken as an example, and the distribution direction of the four stacking stations is perpendicular to the sliding direction of the first stacking platform 32. Each stacking station can receive a group of battery cells 100 transplanted by the first transplanting device 2. The arrangement direction of the plurality of battery cells 100 in the battery cell group 200 is consistent with the length direction of the stacking station. The distance between two adjacent stacking stations is adapted to the distance between two adjacent clamps, so that the first transplanting device 2 can perform stacking operations of four groups of battery cells 100 at the same time.

[0088] In addition, a support frame 34 is slidably arranged on the base 31, and the sliding direction of the support frame 34 is parallel to the sliding direction of the first stacking platform 32. The second stacking platform 33 is arranged on the support frame 34, and the first stacking platform 32 can slide to the bottom of the second stacking platform 33. The structure of the second stacking platform 33 is consistent with that of the first stacking platform 32, which will not be repeated here.

[0089] Specifically, the first stacking platform 32 and the support frame 34 are both guided and limited by guide rail sliders with respect to the base 31, and racks are connected to the first stacking platform 32 and the support frame 34, and the tooth surfaces of the two racks are arranged oppositely. A gear is connected to the base 31, and the gear is meshed between the two racks. The rotation of the gear is driven by a motor.

[0090] When the motor drives the gear 743 to rotate, the two racks can slide at the same time, thereby driving the first stacking platform 32 and the support frame 34 to exchange positions, so that the first stacking platform 32 and the second stacking platform 33 are respectively connected to the first transplanting device 2 and the second transplanting device 4. After the first transplanting device 2 transplants the battery cells 100 to the first stacking platform 32, the first stacking platform 32 filled with battery cells 100 moves to the position of connecting with the second transplanting device 4 for unloading, and the empty second stacking platform 33 is connected to the first transplanting device 2 for continuous loading, thereby shortening the time when the first transplanting device 2 stops working and improving work efficiency.

[0091] Optionally, in some other embodiments, the sliding of the first stacking platform 32 and the support frame 34 may also be driven by driving members such as cylinders or screw rods.

[0092] Preferably, the first stacking platform 32 and the second stacking platform 33 are both provided with a pushing mechanism 35 which can push the cell group 200 along the arrangement direction of the multiple cells 100 in the cell group 200 so that all the cells 100 in the cell group 200 are tightly attached. The present embodiment will be illustrated by taking the pushing mechanism 35 arranged on the first stacking platform 32 as an example. The pushing mechanism 35 specifically includes a positioning plate 351 and a pushing plate 352. The positioning plate 351 is fixedly connected to the first stacking platform 32, and one positioning plate 351 is arranged corresponding to each stacking station. The pushing plate 352 is slidably arranged on the first stacking platform 32. The arrangement direction of the pushing plate 352 and the positioning plate 351 is parallel to the length direction of the stacking station, and the sliding direction of the pushing plate 352 is parallel to the length direction of the stacking station, that is, the sliding direction of the pushing plate 352 in the present embodiment is parallel to the sliding direction of the first stacking platform 32. The sliding of the pushing plate 352 in the present embodiment is driven by a lead screw, and is guided and limited by a guide rail slider. In some other embodiments, other driving methods such as rack and pinion driving and cylinder driving can also be adopted.

[0093] When a group of battery cells 100 are stacked on each of the four stacking stations of the first stacking platform 32, the first stacking platform 32 is moved toward the second transfer device 4, and the pushing plate 352 can be slid to push the battery cell 100 in the battery cell group 200 closest to the pushing plate 352, so that the battery cell group 200 slides toward the positioning plate 351 as a whole until all the battery cells 100 in the battery cell group 200 are in close contact with each other, thereby completing the pushing and shaping of the battery cell group 200.

[0094] In addition, a squeezing plate 353 is provided on the pushing plate 352 corresponding to each stacking station. Each squeezing plate 353 is slidably connected to the pushing plate 352, and the sliding direction is parallel to the sliding direction of the pushing plate 352. Therefore, when the pushing mechanism 35 is working, it can compensate for the length error between each battery cell group 200, so that all battery cells 100 in each battery cell group 200 are close to each other, so as to adapt to the situation where the total length of some battery cell groups 200 is different after pushing and shaping.

[0095] Reference Figure 7The second transplanting device 4 includes a transplanting mechanism 41 and a clamp 42. The transplanting mechanism 41 can be a manipulator or a three-axis module. In this embodiment, the manipulator is taken as an example. The clamp 42 includes a bottom plate 421 and a clamping plate 422. The bottom plate 421 is rotatably connected to the transplanting mechanism 41, and the rotation axis is perpendicular to the bottom plate 421, so that the clamp 42 can be rotated relative to the manipulator to facilitate picking up and placing the battery cell group 200. Two clamping plates 422 are arranged on the bottom plate 421 at intervals, and the spacing between the two clamping plates 422 can be adjusted along the arrangement direction of the multiple battery cell groups 200. Specifically, the two clamping plates 422 are both slidably connected to the clamping plate 422, and the sliding direction of the clamping plate 422 coincides with the distribution direction of the two clamping plates 422. The sliding method can adopt any of the above, which will not be repeated here.

[0096] When the first stacking platform 32 filled with four groups of battery cells 100 moves to the position of docking with the second transplanting device 4, the transplanting mechanism 41 drives the clamp 42 to clamp the battery cell group 200. The number of battery cell groups 200 clamped by the clamp 42 at a time is the number that the clamp 42 can grab in the battery module. In this embodiment, two groups are taken as an example. In the process of clamping the battery cell group 200, the two groups of battery cells 100 are squeezed, so that the two groups of battery cells 100 are close to each other to form the prototype of the battery module, and then the two groups of battery cells 100 are placed on the shaping device 5 for the next step of processing. That is, after the first stacking platform 32 reaches the unloading position, only two material-taking actions are required to empty the battery cells 100 on the first stacking platform 32, thereby completing the rapid unloading of the first stacking platform 32, so that the first stacking platform 32 can be reloaded, which greatly speeds up the operation rhythm.

[0097] Reference Figure 8 The shaping device 5 includes a shaping table 51, a conveying mechanism 53 and a shaping mechanism 52. The conveying mechanism 53 is arranged on the shaping table 51. A conveying tray 531 is arranged on the conveying mechanism 53. The conveying tray 531 can receive the battery cell group 200. In this embodiment, two conveying mechanisms 53 are arranged. A single conveying tray 531 receives two groups of battery cells 100 transplanted by the second transplanting device 4, thereby leaving space for receiving four groups of battery cells 100, so that the second transplanting device 4 can quickly empty the battery cells 100 on the first stacking platform 32 or the second stacking platform 33 to speed up the production cycle. The specific structure of the conveying mechanism 53 is the prior art and will not be repeated here.

[0098] A shaping mechanism 52 is provided corresponding to each conveying mechanism 53, and each shaping mechanism 52 includes a first shaping plate 521 and a second shaping plate 522. Two first shaping plates 521 are arranged at intervals on the shaping table 51, and the distance between the two first shaping plates 521 is adjustable; two second shaping plates 522 are arranged at intervals on the shaping table 51, and the distribution direction of the two second shaping plates 522 is perpendicular to the distribution direction of the two first shaping plates 521, and the distance between the two second shaping plates 522 is adjustable, so that the two first shaping plates 521 and the two second shaping plates 522 enclose a space for limiting the battery cell group 200.

[0099] Specifically in this embodiment, the two first shaping plates 521 are distributed along the conveying direction of the conveying mechanism 53, and one of the first shaping plates 521 is fixed to the side of the conveying tray 531 away from the second transplanting device 4, and the other first shaping plate 521 is slidably connected to the side of the shaping table 51 close to the second transplanting device 4, and the first shaping plate 521 slides along the conveying direction of the conveying mechanism 53. The two second shaping plates 522 are distributed along the conveying direction perpendicular to the conveying mechanism 53, that is, the conveying tray 531 is located between the two second shaping plates 522, and the two second shaping plates 522 are both slidably connected to the shaping table 51, and the sliding direction of the second shaping plates 522 is perpendicular to the conveying direction of the conveying mechanism 53. The sliding of the first shaping plate 521 and the second shaping plate 522 is driven by a cylinder.

[0100] When two groups of battery cells 100 are placed on the conveying tray 531, the two first shaping plates 521 are brought close to each other to squeeze the battery cell group 200 in a conveying direction parallel to the conveying mechanism 53, and the two second shaping plates 522 are brought close to each other to squeeze the battery cell group 200 in a conveying direction perpendicular to the conveying mechanism 53, so that the two groups of battery cells 100 are compressed and shaped into the prototype of the battery module, so that the outside of the two groups of battery cells 100 can be covered with fixing belts, such as steel belts or hoop belts. Then, the conveying tray 531 with the battery cells 100 is conveyed by the conveying mechanism 53, so that the battery cells 100 covered with the fixing belts flow to the welding device 6.

[0101] In some other embodiments, the first shaping plate 521 and the second shaping plate 522 may also be driven by a driving member such as an electric cylinder or an oil cylinder; the two second shaping plates 522 may also be slidably disposed on the conveying tray 531 .

[0102] Reference Figure 1 and Fig. 9The welding device 6 is configured to weld a plurality of the battery cells 100 to form a battery module. Specifically, the welding device 6 includes a welding table 61, a welding mechanism 62 and a pole addressing mechanism 63. The conveying mechanism 53 extends to the welding table 61. The welding mechanism 62 and the pole addressing mechanism 63 are both arranged on the welding table 61. The pole addressing mechanism 63 includes a three-axis motion mechanism 631 and an addressing camera 632. The addressing camera 632 is connected to the three-axis motion mechanism 631. The welding mechanism 62 is any mechanism in the prior art that can weld poles. The specific structure is the prior art and will not be repeated here.

[0103] In the actual production process, in order to prevent the two adjacent battery cells 100 from being squeezed and deformed against each other, a flexible buffer such as a diaphragm or foam is arranged between the two adjacent battery cells 100, and the buffer is attached to the surface of the battery cell 100 to protect the battery cell 100 from damage. When the battery cell group 200 is shaped, the deformation degree of each buffer is inconsistent, resulting in different spacings between two adjacent battery cells 100 in the same battery cell group 200, so that the position of the pole cannot be determined according to the predetermined size of the battery cell 100. Before welding the battery cell 100, the addressing camera 632 is driven by the three-axis motion mechanism 631 to move above the battery cell group 200, so as to locate the precise position of each pole through the image, and transmit the position information of each pole to the welding mechanism 62, and then the position information of the pole is received by the welding mechanism 62, and the conductive element is welded at the pole, so that the multiple battery cells 100 in the battery module are connected in series or in parallel.

[0104] In some other embodiments, the welding device 6 may also be directly disposed on the shaping table 51 and located at the discharge end of the conveying mechanism 53 .

[0105] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. 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 claims of the present invention.

Claims

1. A battery module assembly production line, the battery module assembly production line comprising a conveyor line (1) and a first transplanting device (2), the conveyor line (1) being capable of transporting battery cells (100), the first transplanting device (2) being arranged on one side of the conveyor line (1), characterized in that: The first transplanting device (2) is capable of transplanting a plurality of the battery cells (100) at a time, and the battery module assembly production line further comprises: A palletizing device (3), the palletizing device (3) comprising a first palletizing platform (32), a plurality of palletizing stations being arranged on the first palletizing platform (32), each of the palletizing stations being capable of receiving a group of the battery cells (100) transplanted by the first transplanting device (2), a pushing mechanism (35) being arranged on the first palletizing platform (32), the pushing mechanism (35) being capable of pushing the battery cell group (200) along the arrangement direction of the plurality of battery cells (100) in the battery cell group (200), so that all the battery cells (100) in the battery cell group (200) are closely attached; A second transplanting device (4), the second transplanting device (4) being capable of picking up a plurality of battery cell groups (200) at a time, and pushing the battery cell groups (200) along a distribution direction of the plurality of battery cell groups (200) so that the plurality of battery cell groups (200) are closely attached to each other; and A shaping device (5), wherein the shaping device (5) is capable of receiving the battery cell group (200) picked up by the second transplanting device (4), and performing extrusion shaping on the battery cell group (200) so that a fixing belt can be sleeved on the outside of the battery cell group (200).

2. The battery module assembly production line according to claim 1, characterized in that: The palletizing device (3) further comprises: A base (31), the first stacking platform (32) is slidably arranged on the base (31), a support frame (34) is slidably arranged on the base (31), and the sliding direction of the support frame (34) is parallel to the sliding direction of the first stacking platform (32); and A second stacking platform (33), wherein the second stacking platform (33) is arranged on the support frame (34), and the first stacking platform (32) can slide to the bottom of the second stacking platform (33); The second transplanting device (4) is located on a side of the base (31) away from the second transplanting device (4), and the first stacking platform (32) and the second stacking platform (33) are capable of docking with the first transplanting device (2) and the second transplanting device (4) respectively.

3. The battery module assembly production line according to claim 1, characterized in that: The pushing mechanism (35) comprises: A positioning plate (351); and A push plate (352), the push plate (352) being slidably disposed on the first stacking platform (32), the arrangement direction of the push plate (352) and the positioning plate (351) being parallel to the arrangement direction of the plurality of battery cells (100) in the battery cell group (200), and the sliding direction of the push plate (352) being parallel to the arrangement direction of the push plate (352) and the positioning plate (351).

4. The battery module assembly production line according to claim 1, characterized in that: The second transplanting device (4) comprises a transplanting mechanism (41) and a clamp (42), wherein the clamp (42) comprises: a bottom plate (421), the bottom plate (421) being connected to the transplanting mechanism (41); and A clamping plate (422), wherein two clamping plates (422) are arranged at intervals on the bottom plate (421), and the distance between the two clamping plates (422) can be adjusted along the arrangement direction of the multiple groups of battery cell groups (200).

5. The battery module assembly production line according to claim 4, characterized in that: The bottom plate (421) is rotatably connected to the transplanting mechanism (41), and the rotation axis is perpendicular to the bottom plate (421).

6. The battery module assembly production line according to claim 1, characterized in that: The shaping device (5) comprises: a shaping platform (51), the shaping platform (51) being capable of receiving the battery cell group (200); and A shaping mechanism (52), the shaping mechanism (52) comprising a first shaping plate (521) and a second shaping plate (522), wherein two first shaping plates (521) are arranged at intervals on the shaping platform (51), and the distance between the two first shaping plates (521) is adjustable; and two second shaping plates (522) are arranged at intervals on the shaping platform (51), the distribution direction of the two second shaping plates (522) is perpendicular to the distribution direction of the two first shaping plates (521), and the distance between the two second shaping plates (522) is adjustable, so that the two first shaping plates (521) and the two second shaping plates (522) enclose a space for limiting the plurality of battery cell groups (200).

7. The battery module assembly production line according to claim 6, characterized in that: The shaping device (5) further comprises: A conveying mechanism (53), the conveying mechanism (53) being arranged on the shaping platform (51), the conveying mechanism (53) being provided with a conveying tray (531), the conveying tray (531) being capable of receiving a plurality of groups of the battery cell groups (200); The two first shaping plates (521) are arranged along a conveying direction parallel to the conveying mechanism (53), and one of the first shaping plates (521) is arranged on the conveying tray (531).

8. The battery module assembly production line according to claim 1, characterized in that: The battery module assembly production line further comprises a polarity adjustment device (7), wherein the polarity adjustment device (7) comprises: Base (71); A material taking seat (72), wherein the material taking seat (72) is slidably arranged or rotatably arranged on the base (71), and the material taking seat (72) can be close to the battery core (100) or away from the battery core (100); A material picking member (73), wherein at least one group of the material picking members (73) is arranged on the material picking seat (72), and at least two of the material picking members (73) are arranged in one group, and the material picking member (73) is rotatably connected to the material picking seat (72) via a rotating shaft, and the axis of the rotating shaft is perpendicular to the plane on which the electrodes of the battery cell (100) are arranged, and the material picking member (73) can pick up the battery cell (100); and A driving mechanism (74), wherein the driving mechanism (74) is arranged on the material picking seat (72), and the driving mechanism (74) can drive some of the material picking members (73) in a group of the material picking members (73) to rotate or all of the material picking members (73) to rotate.

9. The battery module assembly production line according to claim 8, characterized in that: The driving mechanism (74) comprises: A driving rack (741), wherein the driving rack (741) is slidably arranged on the material picking seat (72), the sliding direction of the driving rack (741) is perpendicular to the axial direction of the rotating shaft, the length direction of the driving rack (741) is perpendicular to the axial direction of the rotating shaft, and at least two driving racks (741) are arranged in parallel; A first driving member (742), wherein the first driving member (742) is disposed on the material taking seat (72), and the first driving member (742) is capable of driving all the driving racks (741) to slide simultaneously; A driving gear (743), wherein the driving gear (743) is slidably sleeved on the outside of each of the rotating shafts, the driving gear (743) can rotate synchronously with the rotating shaft, and the driving rack (741) and the driving gear (743) are arranged in a one-to-one correspondence; and A second driving member (744), one of the second driving members (744) is provided for each of the driving gears (743), and the second driving member (744) is used to drive the driving gear (743) to slide axially along the rotating shaft, so that the driving gear (743) has a first working state of meshing with the driving rack (741) and a second working state of exiting meshing with the driving rack (741).

10. The battery module assembly production line according to claim 1, characterized in that: The battery module assembly production line also includes: A welding device (6) is configured to weld a plurality of the battery cells (100) to form a battery module.

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