Screw locking device for assembling lithium battery pack

Abstract

The utility model relates to the technical field of lithium battery pack assembly, in particular to a screw locking device for lithium battery pack assembly, which comprises a workbench, a material placing frame, feeding frames and a controller, the material placing frame is positioned between the feeding frames at two ends of the workbench, a feeding mechanism is arranged on one side of the workbench, the feeding mechanism comprises a gantry linear module and a clamp, and the gantry linear module is connected with the controller. Screw locking mechanisms are arranged at the bottoms of the feeding frames, each screw locking mechanism comprises a plurality of connecting screws, a fixing base, a fixing frame, a loading head, a screwdriver rotating rod and a driving motor, a screw positioning piece is arranged between the fixing base and the fixing frame, and a screw pushing piece is arranged between the driving motor and the fixing frame. And screw feeders which are positioned on one side of the fixed seat and are used for supplying connecting screws to the charging head are symmetrically arranged on the working table, so that the problems that the working intensity is high and the production efficiency of lithium battery pack assembly is reduced due to the fact that the screws are manually turned by workers when a fixed block is mounted on the upper cover of a traditional battery pack are solved.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery pack assembly, and specifically discloses a screw locking device for lithium battery pack assembly. Background Art

[0002] A lithium battery pack is composed of multiple battery groups, mainly including battery modules, mechanical systems, electrical systems, thermal management systems and battery management systems. It is widely used in large and medium-sized electric equipment such as electric vehicles and electric bicycles.

[0003] The production and assembly process of lithium battery packs is also called the lithium battery pack PACK process, which mainly includes the assembly process, airtightness testing process, software writing process and electrical performance testing process. Among them, the assembly process is the process of assembling the battery pack into a finished lithium battery pack. The battery pack is sealed, packaged and supported by peripheral structures such as the battery pack cover, tray, various metal brackets, end plates and bolts. After the peripheral structure of the battery pack is installed, it is necessary to finally install the fixing block on the outside of the battery pack cover to complete the installation and sealing of the entire lithium battery pack.

[0004] When installing the fixing block, each fixing block needs to be locked and connected to the side wall of the fixing block and the inner side of the battery pack cover with two fastening screws. The existing fixing block installation is usually done by workers manually tightening the screws. Due to the mass production of lithium battery packs, workers continue to tighten the screws manually on the assembly process production line, which is labor-intensive and has low production efficiency. Therefore, in view of this, the inventor provides a screw locking device for lithium battery pack assembly to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the problem that workers manually tighten screws when installing the fixing block on the upper cover of the traditional battery pack, which has high work intensity and reduces the production efficiency of the lithium battery pack assembly.

[0006] In order to achieve the above-mentioned purpose, the basic scheme of the utility model provides a screw locking device for lithium battery pack assembly, including a workbench, a material rack arranged on the workbench and used to place the lithium battery pack, a loading rack and a controller symmetrically arranged at both ends of the workbench and used to place the fixed block, the material rack is located between the loading racks at both ends of the workbench, and one side of the workbench is provided with a loading mechanism for transferring the fixed block from the loading rack to the top of the lithium battery pack on the loading rack, the loading mechanism includes a gantry linear module electrically controlled by the controller and a clamp that can slide on the gantry linear module and is used to clamp the fixed block, and the bottom of the loading rack is provided with a screw locking mechanism, and the screw locking mechanism includes a screw that can be engaged with the fixed block and the inner cover of the battery pack A plurality of connecting screws connected by side threads, a fixing seat arranged on the workbench and located below the loading rack, a fixing rack slidably connected to the fixing seat, a loading head arranged at one end of the fixing rack close to the material loading rack and used to accommodate the connecting screws, a screwdriver rotating rod rotatably connected to the ends of the fixing rack and the loading head and used to drive the connecting screws in the loading head to be threadedly connected to the fixing block and the inner side of the upper cover of the battery pack, and a driving motor laterally detachably installed on the fixing rack and used to drive the screwdriver rotating rod to rotate, a screw positioning piece is arranged between the fixing seat and the fixing rack, a screw pushing piece is arranged between the driving motor and the fixing rack, and a screw feeder is symmetrically arranged on the workbench and located on one side of the fixing seat and used to supply connecting screws to the loading head.

[0007] The principles and effects of this basic solution are:

[0008] 1. Compared with the prior art, the utility model realizes automatic loading of the fixed block to the top of the battery pack by using a controller to control the displacement adjustment of the gantry linear module and the fixture. It has a simple structure, is easy to use, and improves production efficiency.

[0009] 2. Compared with the prior art, the utility model realizes the operation of electric screwing by arranging a screw pusher to drive the connecting screw to cooperate with the thread on the inner side of the fixing block and the upper cover of the battery pack, and facilitates the automatic installation and push-locking of the connecting screw on the fixing block and the inner side of the upper cover of the battery pack by arranging a screw positioning member. The automatic installation of the connecting screw greatly improves the production efficiency, avoids the error rate of manual installation, improves the assembly quality of the lithium battery pack, and solves the problem that when the traditional battery pack upper cover is installed with the fixing block, the workers manually tighten the screws, which has high work intensity and reduces the production efficiency of the lithium battery pack assembly.

[0010] Furthermore, the loading rack includes a loading support rack arranged on the workbench and a plurality of stacking boxes arranged on the top of the loading support rack and used to accommodate and place the fixed blocks, and the stacking boxes are evenly provided with a plurality of positioning grooves for accommodating the fixed blocks. By providing the loading support rack and the stacking boxes, it is convenient to support and centrally place the fixed blocks, making loading more convenient.

[0011] Furthermore, the bottom of the material rack is detachably connected to the workbench, and the material rack is provided with a plurality of limit blocks for accommodating the lithium battery pack. By setting the connection between the material rack and the workbench and providing the limit blocks on the material rack, it is convenient to support and fix the lithium battery pack to be processed, and the installation quality and accuracy of the fixing blocks and screws on the lithium battery pack are improved.

[0012] Furthermore, the gantry linear module includes a gantry frame across the workbench, a transverse guide rail arranged on the top of the gantry, a vertical guide rail that can slide transversely on the transverse guide rail, a longitudinal slide that can slide vertically on the vertical guide rail, and a sliding seat arranged on the longitudinal slide for longitudinal sliding. The clamp includes an electric clamp arranged at the bottom of the sliding seat and used to clamp the fixed block. The end of the transverse guide rail is provided with a transverse driving member for driving the vertical guide rail to slide transversely, the end of the vertical guide rail is provided with a vertical driving member for driving the longitudinal slide to slide vertically, and the end of the longitudinal slide is provided with a longitudinal driving member for driving the sliding seat to slide longitudinally. The electric clamp, the transverse driving member, the vertical driving member and the longitudinal driving member are all electrically connected to the controller. By setting up a horizontal drive member, a vertical drive member and a longitudinal drive member to respectively drive the sliding adjustment of the vertical guide rail, the longitudinal slide and the sliding seat, the displacement control of the electric gripper in the three-axis direction is realized. By setting up a gantry, the electric gripper can freely clamp the fixed block between the two loading racks and install and tighten the screws, ensuring sufficient supply of the fixed block and improving work efficiency.

[0013] Furthermore, the screw positioning member includes a transverse positioning slide rail disposed on the top of the fixing seat, a transverse positioning slide slidably connected to the transverse positioning slide rail, and a positioning drive member used to drive the transverse positioning slide to slide on the transverse positioning slide rail. The fixing frame is fixed on the transverse positioning slide rail, and the positioning drive member is electrically connected to the controller. By setting the positioning drive member to drive the transverse positioning slide to slide and adjust on the transverse positioning slide rail, the position of the fixing frame and the loading head can be adjusted laterally, thereby achieving the purpose of calibrating the docking position of the connecting screws in the loading head with the fixing block and the inner side of the upper cover of the lithium battery pack.

[0014] Furthermore, the screw pusher includes a longitudinal push rail arranged on a fixed frame, a longitudinal push slide slidably connected to the longitudinal push rail, and a push drive member for driving the longitudinal push slide to slide on the longitudinal push rail, the drive motor is fixed on the longitudinal push slide, and the push drive member is electrically connected to the controller. By setting the push drive member to drive the longitudinal push slide to slide and adjust on the longitudinal push rail, the purpose of driving the screwdriver rotating rod coaxially connected to the drive motor and the connecting screw coaxially placed with the screwdriver rotating rod in the loading head to be pushed longitudinally is achieved through the longitudinal push of the push drive motor, which is simple to use, ingeniously designed, and improves the efficiency of screw locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The overall structural diagram of a screw locking device for lithium battery pack assembly proposed in an embodiment of the present application is shown;

[0017] Figure 2 A structural schematic diagram of a screw locking mechanism of a screw locking device for assembling a lithium battery pack proposed in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0018] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0019] The figure marks in the drawings of the specification include: workbench 1, lithium battery pack 2, material rack 3, loading support frame 4, stacking box 5, positioning slot 6, gantry 7, transverse guide rail 8, vertical guide rail 9, longitudinal slide 10, sliding seat 11, electric clamp 12, transverse drive member 13, vertical drive member 14, fixed seat 15, fixed frame 16, loading head 17, screwdriver rotating rod 18, driving motor 19, transverse positioning slide 20, transverse positioning slide 21, positioning drive member 22, longitudinal propulsion slide 23, longitudinal propulsion slide 24, propulsion drive member 25, screw feeder 26, fixed block 27, feed slot 28.

[0020] A screw locking device for lithium battery pack assembly, for example Figure 1 As shown: it includes a workbench 1, a material rack 3 arranged on the workbench 1 and used to place a lithium battery pack 2, a loading rack and a controller symmetrically arranged at both ends of the workbench 1 and used to place a fixed block 27, the controller includes but is not limited to a PLC controller, the material rack 3 is located between the loading racks at both ends of the workbench 1, the bottom of the material rack 3 is detachably connected to the workbench 1, the material rack 3 is provided with four limit blocks for accommodating the four bottom corners of the lithium battery pack 2, the loading rack includes a loading support frame 4 arranged on the workbench 1 and a plurality of stacking boxes 5 arranged on the top of the loading support frame 4 and used to accommodate and place the fixed block 27, and the stacking box 5 is evenly provided with a plurality of positioning grooves 6 for accommodating the fixed block 27.

[0021] A loading mechanism is provided on one side of the workbench 1 for transferring the fixed block 27 from the stacking box 5 of the loading rack to the top of the lithium battery pack 2 on the storage rack 3. The loading mechanism includes a gantry linear module electrically controlled by a controller and a clamp that can slide on the gantry linear module and is used to clamp the fixed block 27. The gantry linear module includes a gantry 7 across the workbench 1, a transverse guide rail 8 provided on the top of the gantry 7, a vertical guide rail 9 that can slide transversely on the transverse guide rail 8, a longitudinal slide 10 that can slide vertically on the vertical guide rail 9, and a sliding seat 11 provided on the longitudinal slide 10 for longitudinal sliding. The clamp includes an electric clamp 12 provided at the bottom of the sliding seat 11 and used to clamp the fixed block 27. The end of the transverse guide rail 8 is provided with a transverse driving member 13 for driving the vertical guide rail 9 to slide transversely. The end of the vertical guide rail 9 is provided with a vertical driving member 14 for driving the longitudinal slide 10 to slide vertically. The end of the longitudinal slide 10 is provided with a longitudinal driving member for driving the sliding seat 11 to slide longitudinally. The electric clamp 12, the transverse driving member 13, the vertical driving member 14 and the longitudinal driving member are all electrically connected to the controller. The transverse driving member 13, the vertical driving member 14 and the longitudinal driving member include but are not limited to being driven by a servo.

[0022] like Figure 2 As shown, a screw locking mechanism is provided at the bottom of the loading rack, and the screw locking mechanism includes a large number of connecting screws that can be threadedly connected to the fixing block 27 and the inner side of the upper cover of the battery pack, a fixing seat 15 provided on the workbench 1 and located below the loading rack, a fixing frame 16 slidably connected to the fixing seat 15, a loading head 17 provided at one end of the fixing frame 16 close to the material rack 3 and used to accommodate the connecting screws, a screwdriver rod 18 that is rotatably connected to the ends of the fixing frame 16 and the loading head 17 and is used to drive the connecting screws in the loading head 17 to be threadedly connected to the fixing block 27 and the inner side of the upper cover of the battery pack, and a driving motor 19 that is detachably installed on the fixing frame 16 in a transverse direction and is used to drive the screwdriver rod 18 to rotate, wherein two connecting screws need to be installed between each fixing block 27 and the side of the upper cover of the battery pack to complete the installation and fixation. As shown Figure 2 As shown, the loading head 17 includes a loading shell detachably connected to the fixing frame 16, a loading slot provided in the loading shell and capable of accommodating the passing of the connecting screws and the screwdriver shaft 18, and a feeding slot 28 provided at the top of the loading shell and used for inserting the connecting screws into the loading slot, the feeding slot 28 capable of accommodating the passing of the connecting screws and being connected to the loading slot, and the driving motor 19 is electrically connected to the controller.

[0023] like Figure 2As shown, a screw positioning member is provided between the fixing seat 15 and the fixing frame 16, and the screw positioning member includes a transverse positioning slide rail 20 provided on the top of the fixing seat 15, a transverse positioning slide table 21 slidably connected to the transverse positioning slide rail 20, and a positioning driving member 22 for driving the transverse positioning slide table 21 to slide on the transverse positioning slide rail 20, the fixing frame 16 is fixed on the transverse positioning slide table 21, and the positioning driving member 22 is electrically connected to the controller. Figure 2 As shown, a screw propulsion member is provided between the drive motor 19 and the fixed frame 16, and the screw propulsion member includes a longitudinal propulsion slide rail 23 provided on the fixed frame 16, a longitudinal propulsion slide table 24 slidably connected to the longitudinal propulsion slide rail 23, and a propulsion driving member 25 for driving the longitudinal propulsion slide table 24 to slide on the longitudinal propulsion slide rail 23. The drive motor 19 is fixed on the longitudinal propulsion slide table 24, and the propulsion driving member 25 is electrically connected to the controller. Figure 1 As shown, the workbench 1 is symmetrically provided with a screw feeder 26 located in front of the fixing seat 15 and used to supply connecting screws to the loading head 17. The screw feeder 26 adopts an existing commonly used structure. The screw feeder 26 includes but is not limited to a one-outlet two-air blowing screw feeder 26. The screw feeder 26 is connected to the feeding slot 28 and is used to supply connecting screws to the feeding slot 28. The positioning drive 22 and the propulsion drive 25 are driven by a steering gear, but are not limited to.

[0024] In the specific implementation process of the present invention, the lithium battery pack 2 to be assembled is firstly placed, and then a large number of connecting screws are placed in advance in the screw feeder 26 for use in the subsequent installation of the fixing block 27 . When the fixed block 27 is installed and fixed on the inner side of the upper cover of the battery pack, the controller first controls the transverse driving member 13, the vertical driving member 14 and the longitudinal driving member to respectively drive the vertical guide rail 9, the longitudinal slide 10 and the sliding seat 11 to slide, thereby adjusting the electric clamp 12 to move to the top of any stacking box 5, and the controller controls the lifting and opening and closing of the electric clamp 12, so that the electric clamp 12 clamps a fixed block 27 from any positioning groove 6, and the controller controls the transverse driving member 13, the vertical driving member 14, the longitudinal driving member and the electric clamp 12 again, and moves the electric clamp 12 to the upper cover side of the battery pack of the lithium battery pack 2 placed on the material rack 3, the electric clamp 12 clamps the two ends of the fixed block 27 and places the fixed block 27 at the fixed installation position of the fixed block 27 on the inner side of the upper cover, and then needs to continue to clamp the fixed block 27 until the connecting screws thread the fixed block 27 and the upper cover to lock it, and then the controller can control the electric clamp 12 to move and leave the fixed block 27. Among them, in the process of threading and locking the connecting screw with the fixing block 27 and the upper cover, the controller controls the screw feeder 26 to drive the connecting screw into the feeding slot 28, and makes the connecting screw fall into the loading slot coaxial with the screwdriver rod 18. The screwdriver rod 18 rotates under the drive of the driving motor 19 and then cooperates with the head of the connecting screw to drive the connecting screw to rotate coaxially. Then, the controller controls the positioning drive 22 to drive the screwdriver rod 18 on the horizontal positioning slide to slide to a position colinear with the installation position of the fixing block 27, and then the controller controls the propulsion drive 25 to drive the longitudinal propulsion slide 24 to slide forward, thereby driving the screwdriver rod 18 and the connecting screw to move forward along the loading slot and then threadedly cooperate with the side of the upper cover of the battery pack and the fixing block 27 to lock the first connecting screw on the battery pack upper cover and the fixing block 27. Similarly, the second connecting screw is then locked on the battery pack upper cover and the fixing block 27.

[0025] Compared with the prior art, the utility model realizes the operation of electric screwing by setting a screw pusher to drive the connecting screw to cooperate with the thread of the fixing block 27 and the inner side of the upper cover of the battery pack, and facilitates the automatic installation and push-locking of the connecting screw between the fixing block 27 and the inner side of the upper cover of the battery pack by setting a screw positioning member. The utility model also solves the problem that when the traditional battery pack upper cover is installed with the fixing block, the worker manually screws the screws, which has high work intensity and reduces the production efficiency of the lithium battery pack assembly.

[0026] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A screw locking device for lithium battery pack assembly, characterized in that: The utility model comprises a workbench, a material rack arranged on the workbench and used for placing lithium battery packs, a loading rack symmetrically arranged at both ends of the workbench and used for placing fixed blocks, and a controller. The material rack is located between the loading racks at both ends of the workbench. One side of the workbench is provided with a loading mechanism for transferring the fixed block from the loading rack to the top of the lithium battery pack on the loading rack. The loading mechanism comprises a gantry linear module electrically controlled by the controller and a clamp that can slide on the gantry linear module and is used to clamp the fixed block. The bottom of the loading rack is provided with a screw locking mechanism, which comprises a plurality of connecting screws that can be threadedly connected to the inner side of the upper cover of the fixed block and the battery pack, and a controller arranged on the workbench. A fixing seat is located below the loading rack, a fixing rack is slidably connected to the fixing seat, a loading head is arranged at one end of the fixing rack close to the material placing rack and is used to accommodate connecting screws, a screwdriver rotating rod is rotatably connected to the ends of the fixing rack and the loading head and is used to drive the connecting screws in the loading head and is threadedly connected to the fixing block and the inner side of the upper cover of the battery pack, and a driving motor is transversely detachably installed on the fixing rack and is used to drive the screwdriver rotating rod to rotate, a screw positioning piece is arranged between the fixing seat and the fixing rack, a screw pushing piece is arranged between the driving motor and the fixing rack, and a screw feeder is symmetrically arranged on the workbench and is located on one side of the fixing seat and is used to supply connecting screws to the loading head.

2. A screw locking device for lithium battery pack assembly according to claim 1, characterized in that: The loading rack comprises a loading support frame arranged on the workbench and a plurality of stacking boxes arranged on the top of the loading support frame and used for accommodating and placing the fixing blocks, and a plurality of positioning grooves for accommodating the fixing blocks are evenly arranged on the stacking boxes.

3. A screw locking device for lithium battery pack assembly according to claim 2, characterized in that: The bottom of the material rack is detachably connected to the workbench, and the material rack is provided with a plurality of limit blocks for accommodating lithium battery packs.

4. A screw locking device for lithium battery pack assembly according to claim 3, characterized in that: The gantry linear module includes a gantry frame across the workbench, a transverse guide rail arranged on the top of the gantry, a vertical guide rail that can slide transversely on the transverse guide rail, a longitudinal slide that can slide vertically on the vertical guide rail, and a sliding seat arranged on the longitudinal slide for longitudinal sliding. The clamp includes an electric clamp arranged at the bottom of the sliding seat and used to clamp the fixed block. The end of the transverse guide rail is provided with a transverse driving member for driving the vertical guide rail to slide transversely, the end of the vertical guide rail is provided with a vertical driving member for driving the longitudinal slide to slide vertically, and the end of the longitudinal slide is provided with a longitudinal driving member for driving the sliding seat to slide longitudinally. The electric clamp, the transverse driving member, the vertical driving member and the longitudinal driving member are all electrically connected to the controller.

5. A screw locking device for lithium battery pack assembly according to claim 4, characterized in that: The screw positioning member includes a transverse positioning slide rail arranged on the top of the fixing seat, a transverse positioning slide table slidably connected to the transverse positioning slide rail, and a positioning driving member for driving the transverse positioning slide table to slide on the transverse positioning slide rail. The fixing frame is fixed on the transverse positioning slide table, and the positioning driving member is electrically connected to the controller.

6. A screw locking device for lithium battery pack assembly according to claim 5, characterized in that: The screw propulsion member includes a longitudinal propulsion rail arranged on a fixed frame, a longitudinal propulsion slide slidably connected to the longitudinal propulsion rail, and a propulsion driving member for driving the longitudinal propulsion slide to slide on the longitudinal propulsion rail. The driving motor is fixed on the longitudinal propulsion slide, and the propulsion driving member is electrically connected to the controller.

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