A press-fitting shell device and a press-fitting shell method

Abstract

The present invention relates to the technical field of battery production equipment, and more particularly to a press-fitting shell device and a press-fitting shell method. The press-fitting shell device includes a workbench, a cover plate positioning module, a shell positioning module and a downward pressing module. The positioning platform of the cover plate positioning module is used to support and carry the battery cell pre-shell assembly, and the cover plate positioning mechanism of the cover plate positioning module is used to position the four sides of the cover plate; the shell positioning mechanism of the shell positioning module is used to position the four sides of the shell; and then the downward pressing module is used to drive the shell to move downward and fit onto the cover plate, thereby improving the press-fitting accuracy of the shell and the cover plate, which is beneficial to improving the welding quality between the two. The press-fitting shell method uses the above-mentioned press-fitting shell device to position and press-fit the battery cell pre-shell assembly, and can accurately position the shell and the cover plate to improve the press-fitting accuracy, facilitate the subsequent welding of the shell and the cover plate, and is beneficial to improving the welding quality.

Description

Technical Field

[0001] The present invention relates to the technical field of battery production equipment, and in particular to a press-fitting shell device and a press-fitting shell method. Background Art

[0002] The battery assembly process usually includes the following steps: 1) Fixing the cell cover: The cell and the cover are fixed by welding through the connecting piece to form a cell assembly; 2) Pre-shelling the cell: A part of the cell of the cell assembly is loaded into the shell to form a pre-shelled cell assembly; 3) Completely shelling the cell: The cell in the pre-shelled cell assembly is completely pressed into the shell to form a fully shelled cell assembly; 4) Fixing the shell cover: Position welding the shell and the cover in the fully shelled cell assembly to complete the battery assembly. Since the accuracy of the cell shelling process directly affects the quality and safety of the battery, the assembly accuracy of the cell shelling process is required to be high.

[0003] In the existing steps of completely inserting the battery cell into the shell, most of them adopt upright shell insertion or sideways shell insertion, wherein upright shell insertion is to prevent the shell opening from facing upward and clamping it, and then the battery cell is loaded into the shell from top to bottom; sideways shell insertion is to place the shell opening horizontally and position it, and then push the battery cell into the shell horizontally. However, the above two methods have the following disadvantages: since the shell is usually a stamping part, its thickness is relatively thin, and the whole body is prone to micro-deformation, and the battery cell is heavy, when it is upright or sideways into the shell, the cover plate is difficult to position, and it is easy to deviate after positioning, resulting in low positioning accuracy of the shell and the cover plate, and prone to problems such as full welding explosion points and explosion points.

[0004] Therefore, there is an urgent need for a press-fit shell device to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a press-fitting shell device and a press-fitting shell method for positioning and press-fitting a battery cell pre-shell assembly, which can accurately position the shell and the cover plate to improve the press-fitting accuracy, facilitate the subsequent welding of the shell and the cover plate, and help improve the welding quality.

[0006] In order to achieve the above objectives, the following technical solutions are provided:

[0007] In a first aspect, a press-fit shell device is provided, which is used for positioning and press-fitting a battery cell pre-shell assembly, wherein the battery cell pre-shell assembly comprises a cover plate, a battery cell and a shell, one end of the battery cell is fixedly connected to the cover plate, and the other end of the battery cell is partially pressed into the shell, and the press-fit shell device comprises:

[0008] Workbench;

[0009] A cover plate positioning module, comprising a positioning platform and a plurality of cover plate positioning mechanisms, wherein the positioning platform is mounted on the workbench and is used to carry the battery cell pre-shell assembly, and a plurality of cover plate positioning mechanisms are mounted on the positioning platform, and output ends of the plurality of cover plate positioning mechanisms are capable of positioning at least two opposite sides of the cover plate;

[0010] A shell positioning module, comprising a mounting member and a shell positioning mechanism, wherein the mounting member is mounted on the workbench and is located above the positioning platform, the mounting member is provided with an escape opening for the shell to pass through, and a plurality of the shell positioning mechanisms are arranged around the escape opening and are used to position at least two opposite sides of the shell;

[0011] The downward pressing module is used to drive the shell to move downward.

[0012] As an optional solution for the press-fitting shell device, the cover plate positioning module also includes a translation drive mechanism, and the positioning platform is movably installed on the workbench in a horizontal direction. The translation drive mechanism is used to drive the positioning platform to move in a horizontal direction so that the positioning platform has a press-fitting position corresponding to the shell positioning module and avoids the upper material position and / or lower material position of the shell positioning module.

[0013] As an optional scheme for the press-fitting shell device, a pad is provided on the positioning platform, and the pad is used to support the battery cell pre-shell assembly. The cover positioning mechanism is provided with two, and the two cover positioning mechanisms are symmetrically installed on opposite sides of the pad, and the two cover positioning mechanisms are used to position at least two opposite sides of the cover.

[0014] As an optional solution for the press-fit shell device, the cover positioning mechanism includes a cover positioning driver and a cover positioning piece, the cover positioning driver is used to drive the cover positioning piece to move in a horizontal direction, the cover positioning piece is provided with a positioning groove, and the positioning grooves of the two cover positioning mechanisms are spliced ​​to form a positioning cavity for positioning the cover.

[0015] As an optional scheme for the press-fit shell device, the cover plate positioning member includes a fixing part, a first positioning part and a second positioning part, the fixing part is connected to the output end of the cover plate positioning driver, a plurality of the first positioning parts are arranged on the fixing part at intervals, two of the second positioning parts are arranged on both sides of the plurality of first positioning parts, and the second positioning part protrudes from the first positioning part; the end face of the first positioning part can abut against the first edge of the cover plate, and the side face of the second positioning part can abut against the second edge of the cover plate, wherein the first edge of the cover plate is perpendicular to the second edge of the cover plate.

[0016] As an optional scheme for the press-fitting into shell device, the press-fitting into shell device also includes a first sensor and a second sensor, the first sensor and the second sensor are both located on the peripheral side of the battery cell pre-shell assembly, and the detection surface of the first sensor is not lower than the upper surface of the cover plate or the upper surface of the cover plate positioning piece, and the detection surface of the second sensor is not higher than the lower surface of the cover plate or the upper surface of the pad.

[0017] As an optional solution for the press-fitting shell device, the shell positioning module also includes a lifting drive mechanism, and the mounting part can be lifted and lowered on the workbench. The lifting drive mechanism is used to drive the mounting part to rise and fall in the height direction so that the mounting part has a press-fitting lower limit position arranged around the shell side and an avoidance position to avoid the shell.

[0018] As an optional solution for the press-fit shell device, the shell positioning module also includes a negative pressure dust removal mechanism, which includes a negative pressure part and an air duct. The negative pressure part is installed below the mounting part, and the negative pressure part is surrounded by a avoidance cavity corresponding to the avoidance port of the mounting part. The negative pressure part is provided with an air suction port connected to the avoidance cavity, and the air duct is connected to the negative pressure part and communicated with the air suction port.

[0019] As an optional solution for the press-fit shell device, the shell positioning mechanism includes a shell positioning driver, a fixing frame and a shell positioning plate, the fixing frame is movably mounted on the mounting member in a horizontal direction, the shell positioning plate is liftably mounted on the fixing frame, and the shell positioning driver is mounted on the mounting member and is used to drive the fixing frame to drive the shell positioning plate to move toward or away from the shell.

[0020] As an optional solution for the press-fit shell device, the shell positioning mechanism also includes a downward moving component and a reset component, the downward moving component is used to enable the shell positioning plate to be lifted and lowered on the fixing frame, and the reset component is used to restore the shell positioning plate to its original position.

[0021] As an optional solution for the press-fitting shell device, the press-fitting module includes a press-fitting drive and a press-fitting mechanism. The press-fitting mechanism can be installed on the workbench in a liftable manner and is located above the mounting part. The press-fitting drive is used to drive the press-fitting mechanism to move downward and press the shell to move downward.

[0022] In a second aspect, a press-fitting method is provided. Based on the press-fitting device as described in any of the above schemes, the press-fitting method comprises the following steps:

[0023] Placing the battery cell pre-shell assembly with the cover facing downward on the positioning platform of the cover positioning module;

[0024] Using the cover plate positioning mechanism of the cover plate positioning module to clamp and position the four sides of the cover plate of the battery pre-shell assembly;

[0025] Using the shell positioning mechanism of the shell positioning module to clamp and position the four sides of the shell of the battery pre-shell assembly;

[0026] The housing is driven downward by the downward pressing module until the battery cell is completely inserted into the housing, and then the cover plate positioning mechanism is removed to release the clamping and positioning of the cover plate;

[0027] Using the downward pressing module to drive the shell to continue to move downward until the cover plate is completely inserted into the shell and then stops;

[0028] The shell positioning module and the downward pressing module are reset, and the battery cell is taken out and completely inserted into the shell assembly.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The press-fitting shell device provided by the present invention comprises a workbench, a cover plate positioning module, a shell positioning module and a downward pressing and fitting module. The positioning platform of the cover plate positioning module is used to support and bear the battery cell pre-shell assembly, and the cover plate positioning mechanism of the cover plate positioning module is used to position the four sides of the cover plate; the shell positioning mechanism of the shell positioning module is used to position the four sides of the shell; and then the downward pressing and fitting module is used to drive the shell to move downward and be fitted onto the cover plate, thereby improving the press-fitting accuracy of the shell and the cover plate, which is beneficial to improving the welding quality between the two.

[0031] The press-fitting shell method provided by the present invention, by applying the above-mentioned press-fitting shell device, is used for positioning and press-fitting the battery cell pre-shell assembly, and can accurately position the shell and the cover plate to improve the press-fitting accuracy, facilitate the subsequent welding of the shell and the cover plate, and help improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of the structure of a battery cell pre-shell assembly provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of the structure of a press-fit shell device provided in an embodiment of the present invention;

[0035] Figure 3 A schematic structural diagram of a cover plate positioning module provided in an embodiment of the present invention;

[0036] Figure 4 A partial enlarged view of the cover plate positioning mechanism provided in an embodiment of the present invention;

[0037] Figure 5 A schematic diagram of the structure of a housing positioning module provided by an embodiment of the present invention;

[0038] Figure 6 A schematic diagram of the structure of a housing positioning mechanism provided by an embodiment of the present invention;

[0039] Figure 7 for Figure 5 The enlarged view of point A in the middle;

[0040] Figure 8 A schematic diagram of the structure of a negative pressure dust removal mechanism provided in an embodiment of the present invention;

[0041] Fig. 9 A schematic structural diagram of a downward pressing module provided in an embodiment of the present invention.

[0042] Reference numerals:

[0043] 100, cover plate; 200, battery cell; 300, housing;

[0044] 1. Workbench; 11. Bottom plate; 12. Guide column; 13. Top plate;

[0045] 2. Cover plate positioning module; 21. Positioning platform; 22. Translation drive mechanism; 221. Translation driver; 222. Lead screw nut assembly; 223. Translation guide assembly; 2231. First guide rail; 224. Drag chain; 23. Cover plate positioning mechanism; 231. Pad; 2311. Flange; 232. Cover plate positioning driver; 233. Cover plate positioning member; 2331. Fixing part; 2332. First positioning part; 2333. Second positioning part; 2330. Inclined groove; 234. Second guide rail;

[0046] 3. Shell positioning module; 31. Mounting member; 311. Avoidance; 32. Lifting drive mechanism; 321. Lifting drive; 322. Limiting member; 33. Shell positioning mechanism; 331. Shell positioning drive; 332. Fixing frame; 3321. Limiting groove; 333. Shell positioning plate; 3331. First positioning plate; 3332. Second positioning plate; 3333. Linear guide bearing; 334. Reset assembly; 3341. Fixing member; 3342. Connecting member; 3343. Elastic reset member; 335. Third guide rail; 336. Fourth guide rail; 34. Negative pressure dust removal mechanism; 341. Negative pressure member; 3410. Avoidance chamber; 3411. Air inlet; 342. Air duct;

[0047] 4. Pressing and pressing module; 41. Pressing driver; 42. Pressing and pressing mechanism; 421. Pressing platform; 422. Pressing plate; 4221. First pressing plate; 4222. Second pressing plate; 423. Elastic component; 4231. Guide rod; 4232. Elastic member; 4233. Blocking member; 424. Pressure sensor;

[0048] 51. First sensor; 52. Second sensor. DETAILED DESCRIPTION

[0049] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0050] 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.

[0051] 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.

[0052] In the description of the present invention, the terms "upper", "lower", "left", "right" and other 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 simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate 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.

[0053] Figure 1 The schematic diagram of the structure of the battery pre-shell assembly provided in this embodiment is shown. Figure 1 As shown, the battery cell pre-shell assembly includes a cover plate 100 , a battery cell 200 and a shell 300 , one end of the battery cell 200 is fixedly connected to the cover plate 100 , and the other end of the battery cell 200 is partially pressed into the shell 300 . The battery assembly process generally includes the following steps: 1) fixing the cell cover: the cell 200 and the cover 100 are fixed by welding through a connecting piece to form a cell assembly; 2) pre-shelling the cell: partially loading the cell 200 of the cell assembly into the shell 300 to form a pre-shelled cell assembly; 3) fully shelling the cell: fully pressing the cell 200 in the pre-shelled cell assembly into the shell 300 to form a fully shelled cell assembly, that is, the cell 200 of the fully shelled cell assembly is completely located in the shell 300, and the shell 300 is surrounded by the cover 100; 4) fixing the shell cover: the shell 300 and the cover 100 of the fully shelled cell assembly are positioned and welded to complete the battery assembly.

[0054] In the prior art, the pre-shelling step and the complete shelling step of the battery cell mostly adopt upright shelling or sideways shelling. No matter upright shelling or sideways shelling, the cover plate 100 and the shell 300 cannot be accurately positioned. In addition, during the press-fitting process, the shell 300 is prone to deformation, which further affects the accurate positioning of the shell 300 and the cover plate 100, and is not conducive to the welding and fixation of the shell 300 and the cover plate 100.

[0055] The present embodiment provides a press-fitting shell device, which is used for positioning and press-fitting of a battery cell pre-shell assembly in the step of fully shelling the battery cell. During the press-fitting process, the deformation of the shell 300 can be reduced, so that the cover plate 100 of the battery cell pre-shell assembly can be completely pressed into the shell 300 and accurately matched with the shell 300, thereby facilitating the subsequent welding and fixation between the shell 300 and the cover plate 100 and improving the welding quality between the shell 300 and the cover plate 100.

[0056] For the convenience of description, in this embodiment, the first direction is defined as the width direction of the battery, and the second direction is defined as the length direction of the battery, and the second direction is perpendicular to the first direction. It can be understood that in other embodiments, the first direction can also be the length direction of the battery, and the second direction can be the width direction of the battery.

[0057] Figure 2 FIG. 2 shows a schematic diagram of the structure of the press-fit shell device provided in this embodiment. Figure 2 As shown, the press-fitting shell device includes a workbench 1, a cover plate positioning module 2, a shell positioning module 3, a downward pressing module 4 and a control system. The cover plate positioning module 2, the shell positioning module 3 and the downward pressing module 4 are all installed on the workbench 1. The cover plate positioning module 2 is used to carry the battery cell pre-shell assembly and position the cover plate 100 of the battery cell pre-shell assembly; the shell positioning module 3 is used to position the shell 300 of the battery cell pre-shell assembly; the downward pressing module 4 is used to drive the shell 300 to move downward so that the cover plate 100 can be accurately inserted into the shell, which is convenient for the subsequent welding and fixing of the shell 300 and the cover plate 100, and improves the welding quality of the shell 300 and the cover plate 100; the control system is communicated with the cover plate positioning module 2, the shell positioning module 3 and the downward pressing module 4 to realize automated press-fitting shell operation and improve battery assembly efficiency.

[0058] During the press-fitting process, the pre-shelled battery cell assembly is placed on the cover plate positioning module 2 with the cover plate 100 facing downward. The cover plate positioning module 2 positions the cover plate 100, and the shell positioning module 3 positions the shell 300. The downward pressing module 4 is used to drive the shell 300 to move downward until the shell 300 is completely fitted on the battery cell 200 and accurately matches the cover plate 100 to form a fully shelled battery cell assembly. Finally, the fully shelled battery cell assembly is taken away by a human or robot and transferred to the welding station to weld and fix the shell 300 and the cover plate 100.

[0059] In this embodiment, the workbench 1 includes a bottom plate 11, a guide column 12 and a top plate 13. The bottom plate 11 and the top plate 13 are arranged in parallel and spaced apart. The space between the bottom plate 11 and the top plate 13 is a press-fitting space, and the guide column 12 is used to connect the bottom plate 11 and the top plate 13. Such an arrangement can not only ensure the structural strength of the workbench 1, but also facilitate the installation of the cover plate positioning module 2, the shell positioning module 3 and the downward pressing module 4 on the workbench 1. In other embodiments, the bottom plate 11 and the top plate 13 can also be arranged non-parallel, which can be specifically designed according to needs and is not limited here.

[0060] Figure 3 FIG. 2 shows a schematic diagram of the structure of the cover plate positioning module 2 provided in this embodiment. Figure 3 Combination Figure 2As shown, the cover plate positioning module 2 includes a positioning platform 21, a translation drive mechanism 22 and a plurality of cover plate positioning mechanisms 23. The positioning platform 21 is used to carry the battery cell pre-shell assembly. Specifically, the battery cell pre-shell assembly is placed on the positioning platform 21 with the cover plate 100 facing downward. The positioning platform 21 is movably mounted on the bottom plate 11 of the workbench 1 in the horizontal direction; the translation drive mechanism 22 is used to drive the positioning platform 21 to move in the horizontal direction, so that the positioning platform 21 has a press-fitting position corresponding to the shell positioning module 3 and avoids the upper and / or lower material positions of the shell positioning module 3. In this embodiment, the positioning platform 21 has an upper and lower material positions respectively located on both sides of the press-fitting position. A plurality of cover plate positioning mechanisms 23 are installed on the positioning platform 21, and the output ends of the plurality of cover plate positioning mechanisms 23 can position the four sides of the cover plate 100. When loading is required, the translation drive mechanism 22 drives the positioning platform 21 to move to the loading position, and the battery cell pre-shell assembly is placed on the positioning platform 21 with the cover plate 100 facing downward manually or by a robot; then the cover plate positioning mechanism 23 positions the four sides of the cover plate 100; finally, the translation drive mechanism 22 drives the positioning platform 21 to move to the pressing position, waiting for the subsequent battery cell complete shelling process.

[0061] It can be understood that when the positioning platform 21 is in the loading position, the space above the positioning platform 21 should be in an unobstructed state, so that manual or robotic arms can place the battery cell pre-shell assembly on the positioning platform 21; when the positioning platform 21 is in the pressing position, the battery cell pre-shell assembly on the positioning platform 21 should correspond to the shell positioning module 3, so that the shell positioning module 3 can position the shell 300.

[0062] Continue as Figure 3 As shown, the translation drive mechanism 22 includes a translation drive 221 and a screw nut assembly 222. The translation drive 221 is used to drive the screw in the screw nut assembly 222 to rotate so that the nut in the screw nut assembly 222 moves along the screw, and the positioning platform 21 is fixedly connected to the nut of the screw nut assembly 222, so that the positioning platform 21 moves with the nut of the screw nut assembly 222. The translation drive 221 can be a servo motor. Of course, in other embodiments, the translation drive mechanism 22 can also use other linear drive mechanisms, such as a linear cylinder, a linear hydraulic cylinder, etc.

[0063] Since the positioning platform 21 equipped with several cover plate positioning mechanisms 23 has a large weight, the weight will be even greater after the battery cell pre-shell assembly is placed. In order to avoid the translation drive mechanism 22 being damaged due to excessive force in the height direction during the movement of the positioning platform 21, the translation drive mechanism 22 also includes a translation guide assembly 223, which can not only make the positioning platform 21 stably move in a directional manner, but also stably support the positioning platform 21. In this embodiment, the translation guide assembly 223 includes a first guide rail 2231 and a first guide block that are slidably matched. The first guide rail 2231 is fixed on the bottom plate 11 of the workbench 1, and the first guide block is fixedly connected to the positioning platform 21. Two groups of translation guide assemblies 223 are respectively arranged on both sides of the screw nut assembly 222, and the translation guide assembly 223 is used to make the positioning platform 21 translate stably. Of course, in other embodiments, the number of translation guide assemblies 223 can also be increased or decreased as needed, which is not limited here.

[0064] In order to prevent the positioning platform 21 from damaging the internal electrical components such as the gas circuits and circuits during movement, the translation drive mechanism 22 also includes a drag chain 224, and the electrical components such as the gas circuits and circuits can be installed in the drag chain 224, thereby protecting the electrical components and ensuring that the base plate 11 is clean and orderly.

[0065] Figure 4 FIG. 2 shows a partial enlarged view of the cover plate positioning mechanism 23 provided in this embodiment. Figure 4 Combination Figure 3 As shown, the positioning platform 21 is provided with a pad 231, the pad 231 is installed on the positioning platform 21, two cover positioning mechanisms 23 are symmetrically installed on both sides of the pad 231, the battery cell pre-shell assembly is placed on the pad 231, and the output ends of the two cover positioning mechanisms 23 are used to position the four sides of the cover 100 of the battery cell pre-shell assembly. It can be understood that by providing the pad 231, the cover plate 100 of the battery pre-shell assembly can be raised to a certain distance from the surface of the positioning platform 21, so that there is a certain distance between the output end of the cover plate positioning mechanism 23 and the surface of the positioning platform 21, which can reduce the friction between the output end of the cover plate positioning mechanism 23 and the positioning platform 21, and also facilitate the design and assembly of the cover plate positioning mechanism 23; at the same time, the height of the pad 231, that is, the distance between the cover plate 100 and the surface of the positioning platform 21 ≥ the distance between the output end of the cover plate positioning mechanism 23 and the surface of the positioning platform 21, so that the output end of the cover plate positioning mechanism 23 only abuts and positions the cover plate 100 but not the battery cell 200, thereby preventing the cover plate positioning mechanism 23 from obstructing the process of pressing the battery cell 200 into the shell. Of course, in other embodiments, the cover plate positioning mechanism 23 is any number of two or more, which is not limited here.

[0066] The length direction of the battery is the same as the length direction of the pad 231, and the width direction of the battery is the same as the width direction of the pad 231, so that the pad 231 can support the battery pre-shell assembly. The two cover plate positioning mechanisms 23 are located on both sides of the length direction (referring to the second direction) of the pad 231, that is, the two cover plate positioning mechanisms 23 are arranged at intervals along the first direction, and the pad 231 is located between the two cover plate positioning mechanisms 23, so that the two cover plate positioning mechanisms 23 can position the cover 100.

[0067] In this embodiment, the backing plate 231 can be made of an insulating PEEK plate, which is a high-performance, high-temperature-resistant, semi-crystalline thermoplastic plastic with excellent wear resistance and very good mechanical properties. The PEEK plate can not only extend the service life, but also reduce the wear on the cover plate 100.

[0068] Continue as Figure 4 As shown, the cover plate positioning mechanism 23 includes a cover plate positioning driver 232 and a cover plate positioning member 233, and the cover plate positioning driver 232 can drive the cover plate positioning member 233 to move along the first direction. The cover plate positioning member 233 is provided with a positioning groove, and the positioning grooves of the cover plate positioning members 233 of the two cover plate positioning mechanisms 23 form a positioning cavity, and the inner wall of the positioning cavity abuts against the four sides of the cover plate 100 to achieve positioning of the four sides of the cover plate 100. For the convenience of description, the two cover plate positioning members 233 are respectively recorded as a first cover plate positioning member and a second cover plate positioning member, wherein the first cover plate positioning member is provided with a first positioning groove, and the second cover plate positioning member is provided with a second positioning groove. When the first cover plate positioning member and the second cover plate positioning member move toward each other, the inner wall of the first positioning groove can abut against the long side of one side of the cover plate 100 and a part of the two opposite short sides, and the inner wall of the second positioning groove can abut against the long side of the other side of the cover plate 100 and another part of the two opposite short sides, thereby achieving positioning of the four sides of the cover plate 100. Of course, in other embodiments, the two cover plate positioning mechanisms 23 can also be located on both sides of the pad 231 in the width direction. In this case, the first positioning groove of the first cover plate positioning member abuts against the short side of one side of the cover plate 100 and a part of the two opposite long sides, and the second positioning groove of the second cover plate positioning member abuts against the short side of the other side of the cover plate 100 and another part of the two opposite long sides. Those skilled in the art can choose any scheme to lay out the cover plate positioning mechanism 23 according to the above description of the cover plate positioning mechanism 23, as long as it can achieve positioning of the four sides of the cover plate 100, and there is no limitation here.

[0069] The cover plate positioning mechanism 23 further includes a second guide rail 234 and a second guide block that are slidably matched, the second guide rail 234 is fixed on the positioning platform 21 along the first direction, and the second guide block is fixedly connected to the cover plate positioning member 233, so as to enable the cover plate positioning member 233 to move smoothly and directionally along the second guide rail 234. In this embodiment, each cover plate positioning member 233 is equipped with at least two sets of guide rail and guide block structures to ensure that the cover plate positioning member 233 can move smoothly.

[0070] Continue to see Figure 4The cover plate positioning member 233 includes a fixing portion 2331, a first positioning portion 2332 and a second positioning portion 2333. The fixing portion 2331 is connected to the cover plate positioning driver 232. The plurality of first positioning portions 2332 are all located on a side of the fixing portion 2331 close to the pad 231 and are arranged at intervals along the second direction. The end surface of the first positioning portion 2332 is used to abut against the long side of the cover plate 100. The two second positioning portions 2333 are respectively located at both ends of the fixing portion 2331 in the second direction, and the end surface of the second positioning portion 2333 protrudes from the end surface of the first positioning portion 2332. The distance between the two second positioning portions 2333 is equal to the length of the cover plate 100, so that the opposite side walls of the two second positioning portions 2333 are respectively abutted against at least part of the short side of the cover plate 100. In other words, the two second positioning portions 2333 and the plurality of first positioning portions 2332 cooperate to form a positioning groove to position the peripheral side of the cover plate 100 and the pad 231. The pad 231 has a plurality of flanges 2311 spaced apart along the second direction and / or along the first direction, the upper surface of the flange 2311 is flush with the lower surface of the cover plate 100, and the end surface of the flange 2311 protrudes from the end surface of the shell 300 along the second direction and / or the first direction, so that when the shell 300 is completely sheathed on the circumference of the cover plate 100, the flange 2311 can block and support the shell 300 to prevent the shell 300 from being overly pressed downward. On this basis, in order to prevent the pad 231 from hindering the movement of the cover plate positioning member 233, the flange 2311 and the first positioning portion 2332 are staggered, a first air-avoiding groove is formed between two adjacent first positioning portions 2332 and between the first positioning portion 2332 and the second positioning portion 2333, a second air-avoiding groove is formed between two adjacent flanges 2311, and the distance between the end face of the first positioning portion 2332 and the end face of the cover plate 100 is ≤ the distance between the groove wall of the first air-avoiding groove and the end face of the flange 2311, so that the end face of the first positioning portion 2332 can abut against the end face of the cover plate 100. Furthermore, an oblique groove 2330 is provided at the connection between the fixing portion 2331 and the first positioning portion 2332, which plays a role in avoiding air during the process of pressing the battery cell 200 into the shell. When positioning the cover plate 100, the cover plate positioning driver 232 drives the cover plate positioning member 233 to move along the first direction toward the direction close to the battery cell pre-shell assembly until the end surface of the first positioning portion 2332 abuts against the long side of the cover plate 100. At this time, the side walls of the two second positioning portions 2333 respectively abut against the two short sides of the cover plate 100. In other embodiments, the end surface of the first positioning portion 2332 can abut against the short side of the cover plate 100, and the side surface of the second positioning portion 2333 abuts against the long side of the cover plate 100, which can also achieve the above effect, and is not limited here.

[0071] The press-fitting shell device further includes a first sensor 51 and a second sensor 52, both of which are located on the peripheral side of the battery cell pre-shell assembly, and the detection surface of the first sensor 51 is not lower than the upper surface of the cover plate 100 or the upper surface of the cover plate positioning member 233, and the detection surface of the second sensor 52 is not higher than the lower surface of the cover plate 100 or the upper surface of the pad 231. The first sensor 51 is used to detect whether the battery cell 200 is completely pressed into the shell 300 and to prevent the shell 300 from hitting the cover plate positioning member 233 when pressed down, and the second sensor 52 is used to detect whether the cover plate 100 is completely pressed into the shell 300. When pressing down the shell 300, when the shell 300 is pressed down until the battery cell is completely inserted into the shell and the shell 300 is about to contact the upper surface of the cover positioning piece 233, the first sensor 51 can sense the shell 300 and send a signal that "the battery cell 200 is completely inserted into the shell", and control the cover positioning pieces 233 on both sides of the cover 100 to retract and withdraw, and release the cover 100 to prevent the shell 300 from continuing to press down and hit the cover positioning pieces 233; continue to press down the shell 300, and when the shell 300 is pressed down until the cover 100 is completely inserted into the shell, the shell 300 can contact the upper surface of the pad 231, and the second sensor 52 senses the shell 300 and sends a signal that "the cover 100 is completely inserted into the shell", and controls to stop pressing down the shell 300 to prevent the shell 300 from being over-pressed and damaging the battery cell 200, thereby completing the process of completely inserting the battery cell into the shell. Afterwards, the battery cell fully-shelled assembly can be moved to a welding platform by a robot or manually to complete the welding of the shell 300 and the cover plate 100 .

[0072] The first sensor 51 can be a proximity switch, and the first sensor 51 is mounted on the positioning platform 21 through a first fixing bracket, and the upper surface of the first sensor 51 is higher than the upper surface of the cover 100. The first fixing bracket is detachably fixed to the outer side of one of the cover positioning members 233, and the first sensor 51 on the first fixing bracket is arranged opposite to the second positioning portion 2333 of the cover positioning member 233.

[0073] The second sensor 52 may also be a proximity switch. The second sensor 52 is mounted on the positioning platform 21 through a second fixing bracket. The upper surface of the second sensor 52 is slightly lower than or flush with the lower surface of the cover plate 100 or the upper surface of the pad 231. Thus, when the housing 300 is completely sheathed around the cover plate 100, i.e., in contact with the upper surface of the pad 231, the housing 300 can trigger the second sensor 52. The second fixing bracket is provided with a groove for accommodating the second sensor 52, so that the second sensor 52 is embedded in the second fixing bracket, so as to avoid the housing 300 directly pressing on the second sensor 52, which affects the service life of the second sensor 52. At the same time, the second fixing bracket can also provide stable support for the housing 300. In this embodiment, the second fixing bracket is an integral structure with the flange 2311 and the pad 231. The second fixing bracket protrudes in the length direction of the pad 231, and the width of the second fixing bracket is smaller than the width of the pad 231. While being able to block and support the shell 300 to prevent the shell 300 from being overly pressed downward, it can also avoid the second positioning portion 2333 of the cover plate positioning member 233.

[0074] Figure 5 FIG. 2 shows a schematic diagram of the structure of the housing positioning module 3 provided in this embodiment. Figure 5 Combination Figure 2 As shown, the housing positioning module 3 includes a mounting member 31, a lifting drive mechanism 32 and a plurality of housing positioning mechanisms 33. The mounting member 31 is installed on the guide column 12 of the workbench 1 in a liftable manner and is located above the positioning platform 21. The lifting drive mechanism 32 is used to drive the mounting member 31 to move up and down in the height direction, so that the mounting member 31 has a press-fit lower limit position arranged around the housing 300 and an escape position to escape the housing 300. The mounting member 31 is provided with an escape opening 311 for the housing 300 to pass through. Four housing positioning mechanisms 33 are arranged around the escape opening 311 to position the housing 300 on all sides. When the battery cell pre-shell assembly is loaded, the lifting drive mechanism 32 drives the mounting member 31 to rise to the avoidance position to avoid the shell 300, and the positioning platform 21 extends along the first direction to the loading position. When the battery cell pre-shell assembly is placed on the positioning platform 21, the positioning platform 21 retracts along the first direction to the press-fitting position, and then the lifting drive mechanism 32 drives the mounting member 31 to descend to the press-fitting lower limit position. The shell positioning mechanism 33 is arranged around the shell 300 and positions the shell 300. Of course, in other embodiments, in order to facilitate the loading of the battery cell pre-shell assembly, the bottom plate 11 of the workbench 1 can also be lifted and lowered relative to the top plate 13, which can also achieve the above-mentioned effect, which will not be repeated here. Of course, in other embodiments, the shell positioning mechanism 33 is any number of two or more, which is not limited here.

[0075] The lifting drive mechanism 32 includes a lifting drive 321, which is mounted on the bottom plate 11 of the workbench 1. The output end of the lifting drive 321 is connected to the mounting member 31 and is used to drive the mounting member 31 to rise and fall along the guide column 12. Exemplarily, the lifting drive 321 is a linear cylinder or a linear hydraulic cylinder.

[0076] In order to limit the lower limit position of the press-fitting of the mounting member 31, the lifting drive mechanism 32 includes a limit member 322 (see Figure 2 ), one end of the limiter 322 is mounted on the bottom plate 11 of the workbench 1, and the other end of the limiter 322 can abut against the mounting member 31. In other embodiments, the height of the limiter 322 is adjustable, so that the limiter 322 can be used for press-fitting operations of batteries of different heights. Of course, in other embodiments, the lower limit of the press-fitting of the mounting member 31 can be limited by other methods, which are not limited here.

[0077] Continue to see Figure 5 , the four shell positioning mechanisms 33 correspond to the four side surfaces of the shell 300 respectively, that is, two shell positioning mechanisms 33 are symmetrically arranged along the first direction, and two shell positioning mechanisms 33 are symmetrically arranged along the second direction. The structures of the four shell positioning mechanisms 33 can be the same or different, as long as they can position the four sides of the shell 300. In this embodiment, the structural working principles of the four shell positioning mechanisms 33 are the same, and the only difference is that the structural dimensions of the four shell positioning mechanisms 33 are different. For the convenience of understanding, the shell positioning mechanism 33 corresponding to the side surface where the long side of the shell 300 is located is taken as an example to illustrate the technical solution of the shell positioning mechanism 33.

[0078] Figure 6 FIG. 2 shows a schematic diagram of the structure of the housing positioning mechanism 33 provided in this embodiment. Figure 6 Combination Figure 5 As shown, the housing positioning mechanism 33 includes a housing positioning driver 331, a fixing frame 332 and a housing positioning plate 333. The housing positioning driver 331 is mounted on the mounting member 31, the fixing frame 332 is movably mounted on the mounting member 31 along a first direction, and the housing positioning plate 333 is mounted on the fixing frame 332. When the housing 300 is positioned, the housing positioning driver 331 drives the fixing frame 332 to move along the first direction toward the housing 300, so that the housing positioning plate 333 clamps and positions the housing 300.

[0079] Furthermore, the shell positioning mechanism 33 includes a translation guide assembly, which includes a fourth guide rail 336 and a fourth guide block. The fourth guide rail 336 is arranged on the mounting member 31, and the fourth guide block is slidably connected to the fourth guide rail 336, and the fourth guide block is connected to the fixed frame 332. In this way, when the shell positioning driver 331 drives the fixed frame 332 to move along the first direction toward or away from the shell 300, it plays a guiding role, thereby improving the movement stability and accuracy.

[0080] Furthermore, the housing positioning plate 333 includes a first positioning plate 3331 and a second positioning plate 3332. The first positioning plate 3331 is installed on the fixing frame 332 in a height direction so as to be liftable. The second positioning plate 3332 is detachably fixedly connected to the first positioning plate 3331. With such a configuration, when the second positioning plate 3332 is worn, the second positioning plate 3332 can be replaced to avoid scratching or wearing the surface of the housing 300 due to the uneven surface of the second positioning plate 3332. Furthermore, in order to ensure that the first positioning plate 3331 can be stably lifted and lowered, the first positioning plate 3331 and the fixing frame 332 are matched by a linear guide rail.

[0081] In this embodiment, the first positioning plate 3331 is made of a metal plate, which has good structural strength and can increase the service life of the first positioning plate 3331. The second positioning plate 3332 is made of a PEEK plate (polyetheretherketone plate), which is a high-performance, high-temperature-resistant, semi-crystalline thermoplastic plastic with excellent wear resistance and very good mechanical properties. The PEEK plate can not only extend the service life, but also reduce the wear on the housing 300.

[0082] In order to prevent the shell positioning plate 333 from clamping the shell 300, the shell positioning plate 333 also includes a number of clamping elastic members (not shown in the figure), and six clamping elastic members are arranged between the first positioning plate 3331 and the second positioning plate 3332 to prevent the shell 300 from being damaged due to a hard collision between the shell positioning plate 333 and the shell 300, or the shell 300 from being deformed due to excessive clamping of the shell positioning plate 333. Furthermore, the housing positioning plate 333 also includes a plurality of linear guide bearings 3333, and four linear guide bearings 3333 are further provided between the first positioning plate 3331 and the second positioning plate 3332, and the four linear guide bearings 3333 are respectively arranged at the four corners of the first positioning plate 3331. With such a configuration, the housing positioning plate 333 can provide linear flexible clamping positioning to the housing 300 through the clamping elastic member in conjunction with the linear guide bearings 3333, thereby preventing the housing positioning plate 333 from causing damage to the housing 300 due to a hard collision between the housing positioning plate 333 and the housing 300, and ensuring the stability of the telescopic movement of the second positioning plate 3332 relative to the first positioning plate 3331 and the stability of maintaining the position of the second positioning plate 3332 relative to the first positioning plate 3331. Of course, in other embodiments, the number of the clamping elastic members can be any other number, and the number of the linear guide bearings 3333 can be any other number, which is not limited here.

[0083] In order to avoid the shell 300 being blocked by the clamping force of the shell positioning plate 333 during the pressing process, resulting in the inability to complete the press-fitting into the shell, the shell positioning plate 333 is installed on the fixing frame 332 in a liftable manner along the height direction. The shell positioning mechanism 33 also includes a downward moving component, which includes a third guide rail 335 and a third guide block that are slidably matched, the third guide rail 335 is fixed on the fixing frame 332, and the third guide block is fixedly connected to the shell positioning plate 333. In this way, when the shell 300 is positioned on all sides and is ready to be pressed down, the shell positioning plate 333 moves linearly downward with the shell 300, realizing the synchronous movement of the shell positioning plate 333 and the shell 300, thereby avoiding the shell being blocked by the clamping force of the shell positioning plate 333 during the pressing process, resulting in the inability to complete the press-fitting into the shell, reducing the friction between the shell 300 and the shell positioning mechanism 33, avoiding the deformation of the shell 300 due to the friction, and improving the shell insertion accuracy during the press-fitting into the shell.

[0084] Figure 7 Shows Figure 5 The enlarged view of A in the figure. Figure 7 Combination Figure 5As shown, the shell positioning mechanism 33 also includes a reset component 334, which includes a fixing member 3341, a connecting member 3342 and an elastic reset member 3343. The fixing frame 332 is provided with a limiting groove 3321 extending along the height direction. The fixing member 3341 is fixed on the fixing frame 332 and is located above the limiting groove 3321. The first end of the connecting member 3342 can be slidably inserted into the limiting groove 3321. The second end of the connecting member 3342 is fixedly connected to the shell positioning plate 333. One end of the elastic reset member 3343 is connected to the fixing member 3341, and the other end thereof is connected to the connecting member 3342 to ensure that the shell positioning plate 333 can automatically reset after the shell 300 is pressed downward. When the pressing and fitting module 4 drives the shell 300 to move downward, the shell positioning plate 333 can move linearly downward with the shell 300, and the connecting member 3342 moves in the limiting groove 3321, and then the elastic reset member 3343 is pulled to extend through the connecting member 3342. When the pressure of the pressing and fitting module 4 is removed, the shell positioning plate 333 can return to its original position under the elastic force of the elastic reset member 3343. In this way, the reset component 334 cooperates with the downward moving component to make the shell positioning plate 333 move linearly downward with the shell 300, which can prevent hard friction between the shell 300 and the shell positioning mechanism 33, avoid deformation of the shell 300 due to hard friction, and improve the accuracy of the shell 300 during the press-fitting process. It can also improve the accuracy of the reset of the shell positioning plate 333.

[0085] The factors affecting the welding quality between the shell 300 and the cover plate 100 include not only the press-fitting accuracy of the shell 300 and the cover plate 100, i.e. the consistency of the welds between the two, but also the cleanliness of the welds between the two. If there is dust in the welds between the two, it will lead to welding explosion points and high explosion point defect rate. Figure 8 FIG. 2 shows a schematic diagram of the structure of the negative pressure dust removal mechanism 34 provided in this embodiment. Figure 8 Combination Figure 5As shown, the shell positioning module 3 also includes a negative pressure dust removal mechanism 34, which includes a negative pressure member 341 and an air duct 342 connected to the negative pressure member 341. The negative pressure member 341 is fixed below the mounting member 31, and the negative pressure member 341 is arranged to form a avoidance cavity 3410 corresponding to the avoidance port 311 of the mounting member 31. A negative pressure cavity is provided in the negative pressure member 341, and the negative pressure cavity has a slit-shaped air intake port 3411 and an air outlet. The air intake port 3411 is communicated with the avoidance cavity 3410, one end of the air duct 342 is connected to the air outlet, and the other end of the air duct 342 is connected to the compressor. In this embodiment, the avoidance cavity 3410 is rectangular, and the inner wall of the avoidance cavity 3410 and the shell 300 are clearance-matched, which can not only ensure that the shell 300 descends relative to the negative pressure piece 341, but also facilitate the exhaust of the avoidance cavity 3410 and the shell 300, thereby preventing dust from entering the shell 300, and also solves the problems of welding explosion points and high explosion point defect rate caused by dust in the weld between the cover plate 100 and the shell 300, thereby ensuring the welding quality of the cover plate 100 and the shell 300 and improving the safety of the battery.

[0086] When the mounting member 31 is lowered to the lower limit position of the press fitting, the lower surface of the negative pressure member 341 is slightly higher than the upper surface of the cover plate 100, or the lower surface of the negative pressure member 341 just contacts the upper surface of the cover plate 100. In this way, a relatively closed air extraction chamber can be formed in the entire downward pressure space of the housing 300 to improve the negative pressure dust removal efficiency.

[0087] In this embodiment, four air ducts 342 are symmetrically connected to the negative pressure member 341 in pairs, and the four air ducts 342 can perform negative pressure dust removal around the negative pressure member 341. Of course, in other embodiments, the number of air ducts 342 can also be any number of one or more, which is not limited here.

[0088] Fig. 9 FIG. 4 shows a schematic diagram of the structure of the downward pressing module 4 provided in this embodiment. Fig. 9 Combination Figure 2 As shown, the pressing module 4 includes a pressing driver 41 and a pressing mechanism 42. The pressing mechanism 42 is installed on the guide column 12 of the workbench 1 in a manner that it can be raised and lowered and is located above the mounting member 31. The pressing driver 41 is fixed on the top plate 13, and the output end of the pressing driver 41 is connected to the pressing mechanism 42 and is used to drive the pressing mechanism 42 to rise and fall relative to the guide column 12. When the pressing driver 41 drives the pressing mechanism 42 to move downward, the pressing mechanism 42 can abut against the housing 300 and cause the housing 300 to move downward. In this embodiment, the pressing driver 41 can use a servo electric cylinder.

[0089] Continue as Fig. 9As shown, the pressing mechanism 42 includes a pressing platform 421 and a pressing plate 422. The pressing platform 421 can be installed on the guide column 12 in a lifting manner, and the output end of the pressing driver 41 is connected to the pressing platform 421. When the pressing driver 41 drives the pressing platform 421 to move downward, the pressing plate 422 can abut against the top surface of the shell 300, thereby driving the shell 300 to move downward, and completing the process of completely inserting the battery into the shell. In this embodiment, the output end of the pressing driver 41 is connected to the pressing platform 421 by a ball joint, which can not only adapt to the assembly error of the connection position of the pressing driver 41 and the pressing platform 421, but also avoid the wear of the connection part between the output end of the pressing driver 41 and the pressing platform 421 caused by the misalignment of the connection part between the pressing driver 41 and the pressing platform 421.

[0090] The pressing mechanism 42 further includes an elastic component 423, through which the pressing plate 422 can be elastically lifted and lowered and installed below the pressing platform 421, thereby preventing the pressing plate 422 from having a hard collision with the top surface of the housing 300. In this embodiment, four groups of elastic components 423 are respectively arranged at the four corners of the pressing plate 422 to prevent the pressing speed from being too fast during the pressing process, causing the pressing plate 422 to have a hard collision with the housing 300 and damage the battery cell 200, while also ensuring the straightness of the pressing process of the pressing plate 422. Of course, in other embodiments, the number of elastic components 423 can be any other number, which is not limited here.

[0091] The elastic assembly 423 includes a guide rod 4231, an elastic member 4232 and a blocking member 4233. The first end of the guide rod 4231 is fixed to the lower pressing plate 422. The elastic member 4232 is sleeved on the guide rod 4231. One end of the elastic member 4232 abuts against the lower surface of the lower pressing platform 421, and the other end abuts against the upper surface of the lower pressing plate 422. The second end of the guide rod 4231 can slide through the lower pressing platform 421 and is fixedly connected to the blocking member 4233. The blocking member 4233 is used to prevent the guide rod 4231 from being separated from the lower pressing platform 421. Optionally, the blocking member 4233 is detachably connected to the guide rod 4231 through a thread.

[0092] The pressing mechanism 42 also includes a pressure sensor 424, which is installed on the lower surface of the pressing platform 421. The upper surface of the pressing plate 422 can abut against the pressure sensor 424. The pressure sensor 424 is used to detect the pressure it is subjected to and feed back the pressure value to the control system so that the control system can determine whether the battery cell is completely shelled. During the pressing process, the pressing plate 422 first makes linear flexible contact with the shell 300. As the pressing platform 421 continues to press down, the shell 300 reacts on the pressing plate 422, and the elastic member 4232 rebounds under force. The upper surface of the pressing plate 422 can contact the pressure sensor 424. At this time, the pressure sensor 424 detects the pressure of the pressing shell and feeds it back to the control system. During the pressing process, the pressing pressure parameters fed back by the pressure sensor 424 and the pressing stroke parameters pushed downward by the pressing driver 41 can be continuously seen. When the shell 300 is pressed down until the cover plate 100 is completely inserted into the shell, even if the pressing driver 41 continues to drive the pressing platform 421 to move downward, the pressing plate 422 will not continue to move downward. At this time, the blocking force of the pad 231 on the shell 300 causes the pressure detected by the pressure sensor 424 to increase to the set value. In conjunction with the second sensor 52 detecting the signal that "the cover plate 100 is completely inserted into the shell", the control system can determine that the process of the battery cell being completely inserted into the shell is completed, so that the entire pressing process of the battery cell pre-insertion into the shell assembly is safe, stable and precise.

[0093] During each press-fitting process, the stroke parameters of the press-down platform 421 are recorded. Since the size of the same batch of batteries is consistent, the stroke parameters of the press-down platform 421 for the complete shelling process of any battery cell should also be consistent in theory. Considering that there is a certain error in the size of each battery, it is possible to determine whether the equipment and the shelling process of the battery cell are normal by analyzing the stroke parameters of the press-down platform 421. For example, when the stroke parameters of the press-down platform 421 change greatly, the control system can issue a warning notification to remind the staff to check the situation at the press-fitting site in time.

[0094] In the present embodiment, the lower pressing plate 422 includes a first lower pressing plate 4221 and a second lower pressing plate 4222, the first lower pressing plate 4221 is fixedly connected to the guide rod 4231, and the second lower pressing plate 4222 is detachably fixedly connected to the first lower pressing plate 4221. In this way, when the second lower pressing plate 4222 is worn, the second lower pressing plate 4222 can be replaced. In the present embodiment, the first lower pressing plate 4221 is selected from a metal plate, and the metal plate has good structural strength and can increase the service life of the first lower pressing plate 4221. The second lower pressing plate 4222 is selected from a PEEK plate (polyetheretherketone plate), and the PEEK plate is a high-performance, high-temperature resistant, semi-crystalline thermoplastic plastic with excellent wear resistance and very good mechanical properties. The PEEK plate can not only extend the service life of the second lower pressing plate 4222, but also reduce the wear on the housing 300. In other embodiments, the lower pressure plate 422 may further include a spring, and a plurality of springs are arranged between the first lower pressure plate 4221 and the second lower pressure plate 4222 to achieve elastic abutment between the lower pressure plate 422 and the top surface of the shell 300 to prevent the lower pressure plate 422 from damaging the shell 300.

[0095] For ease of understanding, combined Figures 1 to 9 The working process of the press-fit shell device provided in this embodiment is described as follows:

[0096] In the initial state: the positioning platform 21 of the cover positioning module 2 is located at the press-fitting position, the mounting member 31 of the housing positioning module 3 is located at the avoidance position, and the pressing mechanism 42 of the pressing module 4 is located at the initial position.

[0097] Cover plate positioning: the translation drive mechanism 22 drives the positioning platform 21 to extend along the first direction to the loading position, and the battery cell pre-shell assembly is placed on the positioning platform 21 with the cover plate 100 facing downward manually or by a robot; the cover plate positioning mechanism 23 positions the four sides of the cover plate 100; the translation drive mechanism 22 drives the positioning platform 21 to retract along the first direction to the pressing position.

[0098] Shell positioning: The lifting drive mechanism 32 drives the mounting member 31 to move downward. When the mounting member 31 abuts against the limit member, it indicates that the mounting member 31 has moved to the lower limit position of the press-fitting. The shell positioning plates 333 of the shell positioning mechanisms 33 clamp and position the four sides of the shell 300.

[0099] The negative pressure dust removal mechanism 34 is started.

[0100] Pressing into the shell: the downward pressure driver 41 drives the lower pressure plate 422 to move downward, and the lower pressure plate 422 abuts against the shell 300 and makes the shell 300 move downward until it is completely fitted on the battery cell 200. At this time, the first sensor 51 detects the signal that the battery cell is completely entered into the shell, and after controlling the cover positioning mechanism 23 to remove the cover positioning member 233, the downward pressure driver 41 continues to drive the lower pressure plate 422 to move downward until the shell 300 is completely fitted on the cover 100. At this time, the second sensor 52 detects the signal that the cover 100 is completely entered into the shell, and the blocking force of the pad 231 on the shell 300 causes the pressure sensor 424 to detect that the pressure increases to the set value, and the downward pressure driver 41 stops driving and records the pressure value detected by the pressure sensor 424 and the stroke parameters of the lower pressure plate 422 at this time.

[0101] Close the negative pressure dust removal mechanism 34.

[0102] Material removal: the downward pressure driver 41 drives the downward pressure plate 422 to move upward to the initial position, and the shell positioning mechanism 33 removes the clamping of the shell positioning plate 333 on the shell 300; the lifting drive mechanism 32 drives the mounting part 31 to move upward to the avoidance position; the translation drive mechanism 22 drives the positioning platform 21 to extend to the material removal position, and the battery cell fully shelled assembly is removed manually or by a robot, and the next battery cell pre-shelled assembly is installed.

[0103] Compared with the upright press-fitting or sideways press-fitting shell equipment in the prior art, the press-fitting shell device provided in the present embodiment has the following beneficial effects: the cover plate 100 is placed downward in an inverted press-fitting shell mode, which is convenient for carrying and positioning the battery cell 200 and the cover plate 100, and the shell 300 is pushed to be mounted on the battery cell 200 and the cover plate 100, which can avoid the problems of the cover plate being difficult to position during the press-fitting shell process due to the gravity of the battery cell 200, the cover plate being easily displaced and deviated after positioning, and the shell 300 being easily deformed by force during the upright or sideways press-fitting shell process, reduce the probability of deformation of the shell 300 by force, improve the accuracy of battery cell shell insertion, and improve the positioning accuracy of the shell 300 and the cover plate 100, and solve the problem caused by the gravity of the battery cell 200. The poor consistency of the weld between the cover plate and the shell causes welding explosion points and a high rate of explosion point defects, thereby ensuring the consistency of subsequent welding; during the inverted press-fitting process into the shell, large particles of dust on the surface of the battery cell 200 will fall due to gravity, and at the same time, the negative pressure dust removal mechanism 34 that moves with the shell during the press-fitting process is activated, which can effectively prevent dust from entering the shell 300, effectively solving the dust problem during the shelling process of the battery cell 200, not only reducing the risk of short circuits caused by dust inside the battery, but also solving the problems of welding explosion points and a high rate of explosion point defects caused by dust in the weld between the cover plate and the shell, thereby ensuring the welding quality of the cover plate and the shell and improving battery safety.

[0104] Note that in the description of this specification, the description with reference to the terms "one embodiment", "in other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0105] The above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A press-fitting shell device, used for positioning and press-fitting a battery cell pre-shell assembly, the battery cell pre-shell assembly comprising a cover plate (100), a battery cell (200) and a shell (300), one end of the battery cell (200) being fixedly connected to the cover plate (100), and the other end of the battery cell (200) being partially pressed into the shell (300), characterized in that: The press-fit shell device comprises: Workbench (1); A cover plate positioning module (2), comprising a positioning platform (21) and a plurality of cover plate positioning mechanisms (23), wherein the positioning platform (21) is mounted on the workbench (1), and the positioning platform (21) is used to carry the battery cell pre-shelling assembly, and the plurality of cover plate positioning mechanisms (23) are mounted on the positioning platform (21), and the output ends of the plurality of cover plate positioning mechanisms (23) are capable of positioning at least two opposite sides of the cover plate (100), and when the battery cell (200) is completely shelled, the output ends of the cover plate positioning mechanisms (23) stop positioning the cover plate (100); A shell positioning module (3) comprises a mounting member (31) and a plurality of shell positioning mechanisms (33), wherein the mounting member (31) is mounted on the workbench (1) and is located above the positioning platform (21), wherein the mounting member (31) is provided with an escape opening (311) for the shell (300) to pass through, wherein the plurality of shell positioning mechanisms (33) are arranged around the escape opening (311) and are used to position at least two opposite sides of the shell (300), wherein the shell positioning mechanism (33) comprises a shell positioning driver (331), a fixing frame (332) and a shell positioning plate (333), wherein the fixing frame (332) is movable in a horizontal direction. The housing positioning plate (333) is mounted on the mounting member (31) in a manner such that the housing positioning plate (333) can be mounted on the fixing frame (332) in a manner such that the housing positioning plate (333) can be lifted; the housing positioning driver (331) is mounted on the mounting member (31) and is used to drive the fixing frame (332) to drive the housing positioning plate (333) to move in a direction close to or away from the housing (300); the housing positioning mechanism (33) further comprises a downward moving component and a resetting component (334); the downward moving component is used to enable the housing positioning plate (333) to be mounted on the fixing frame (332) in a manner such that the housing positioning plate (333) can be lifted; and the resetting component (334) is used to restore the housing positioning plate (333) to its original position; The downward pressing mold assembly (4) is used to drive the housing (300) to move downward.

2. The press-fit shell device according to claim 1, characterized in that: The cover plate positioning module (2) further comprises a translation drive mechanism (22); the positioning platform (21) is movably mounted on the workbench (1) in a horizontal direction; the translation drive mechanism (22) is used to drive the positioning platform (21) to move in a horizontal direction, so that the positioning platform (21) has a press-fitting position corresponding to the shell positioning module (3) and avoids an upper material position and / or a lower material position of the shell positioning module (3).

3. The press-fit shell device according to claim 1, characterized in that: The positioning platform (21) is provided with a pad (231), the pad (231) being used to carry the battery cell pre-shell assembly, the cover plate positioning mechanisms (23) being provided with two, the two cover plate positioning mechanisms (23) being symmetrically mounted on opposite sides of the pad (231), the two cover plate positioning mechanisms (23) being used to position at least two opposite sides of the cover plate (100); The cover plate positioning mechanism (23) comprises a cover plate positioning driver (232) and a cover plate positioning member (233); the cover plate positioning driver (232) is used to drive the cover plate positioning member (233) to move in a horizontal direction; the cover plate positioning member (233) is provided with a positioning groove; the positioning grooves of the two cover plate positioning mechanisms (23) are combined to form a positioning cavity for positioning the cover plate (100).

4. The press-fit shell device according to claim 3, characterized in that: The press-fitting shell device further comprises a first sensor (51) and a second sensor (52), wherein the first sensor (51) and the second sensor (52) are both located on the peripheral side of the battery cell pre-shell assembly, and the detection surface of the first sensor (51) is not lower than the upper surface of the cover plate (100) or the upper surface of the cover plate positioning member (233), and the detection surface of the second sensor (52) is not higher than the lower surface of the cover plate (100) or the upper surface of the pad (231).

5. The press-fitting shell device according to any one of claims 1 to 4, characterized in that: The shell positioning module (3) further comprises a lifting drive mechanism (32); the mounting member (31) is mounted on the workbench (1) in a liftable manner; the lifting drive mechanism (32) is used to drive the mounting member (31) to be lifted and lowered in a height direction, so that the mounting member (31) has a press-fit lower limit position arranged around the shell (300) and an escape position for avoiding the shell (300).

6. The press-fitting shell device according to any one of claims 1 to 4, characterized in that: The shell positioning module (3) also includes a negative pressure dust removal mechanism (34), the negative pressure dust removal mechanism (34) includes a negative pressure piece (341) and an air duct (342), the negative pressure piece (341) is installed below the mounting piece (31), and the negative pressure piece (341) is surrounded by a avoidance cavity (3410) corresponding to the avoidance opening (311) of the mounting piece (31), the negative pressure piece (341) is provided with an air suction opening (3411) connected to the avoidance cavity (3410), and the air duct (342) is connected to the negative pressure piece (341) and is connected to the air suction opening (3411).

7. The press-fitting shell device according to any one of claims 1 to 4, characterized in that: The downward moving assembly comprises a third guide rail (335) and a third guide block which are slidably matched, the third guide rail (335) is fixed on the fixing frame (332), and the third guide block is fixedly connected to the housing positioning plate (333).

8. The press-fit shell device according to claim 7, characterized in that: The reset component (334) comprises a fixing member (3341), a connecting member (3342) and an elastic reset member (3343); the fixing frame (332) is provided with a limiting groove (3321) extending in the height direction; the fixing member (3341) is fixed to the fixing frame (332) and is located above the limiting groove (3321); the first end of the connecting member (3342) is slidably inserted into the limiting groove (3321); the second end of the connecting member (3342) is fixedly connected to the shell positioning plate (333); one end of the elastic reset member (3343) is connected to the fixing member (3341), and the other end thereof is connected to the connecting member (3342).

9. The press-fitting shell device according to any one of claims 1 to 4, characterized in that: The downward pressing mold assembly (4) comprises a downward pressing driver (41) and a downward pressing mechanism (42). The downward pressing mechanism (42) is installed on the workbench (1) in a liftable manner and is located above the mounting member (31). The downward pressing driver (41) is used to drive the downward pressing mechanism (42) to move downward and press the housing (300) to move downward.

10. A method for press-fitting into a shell, characterized in that: Based on the press-fitting shell device according to any one of claims 1 to 9, the press-fitting shell method comprises the following steps: Placing the battery cell pre-shell assembly on the positioning platform (21) of the cover plate positioning module (2) with the cover plate (100) facing downward; Using the cover plate positioning mechanism (23) of the cover plate positioning module (2) to clamp and position the four sides of the cover plate (100) of the battery cell pre-shell assembly; Using the shell positioning mechanism (33) of the shell positioning module (3) to clamp and position the four sides of the shell (300) of the battery cell pre-shell assembly; Using the downward pressing module (4) to drive the housing (300) to move downward until the battery core is completely inserted into the housing, and then removing the cover plate positioning mechanism (23) to release the clamping and positioning of the cover plate (100); Using the downward pressing mold assembly (4) to drive the housing (300) to continue to move downward until the cover plate (100) is completely inserted into the housing and then stops; The shell positioning module (3) and the downward pressing module (4) are reset, and the battery core is taken out and completely inserted into the shell assembly.

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