Stack shaper and stack shaping method

Abstract

The application discloses a stack shaping device and a stack shaping method. The stack shaping device comprises a rack with a bearing position, four groups of horizontal pushing and pressing modules arranged on the rack and comprising horizontal driving units and elastic pushing and pressing mechanisms capable of moving in the horizontal direction, a vertical pushing and pressing module arranged on the rack and comprising a first vertical driving unit, a second vertical driving unit, a first pressing plate capable of moving in the vertical direction and a second pressing plate capable of moving in the vertical direction, and a control unit for controlling the horizontal pushing and pressing modules and the vertical pushing and pressing module to work. The four groups of horizontal pushing and pressing modules are respectively used for pressing four corner portions of the stack through the elastic pushing and pressing mechanisms. The first pressing plate is used for pressing a top plate in the stack, and the second pressing plate is used for pressing a screw rod with a compression spring in the stack. The application can correct the layer misalignment problem caused by the pressing process through the horizontal pushing and pressing modules, and better stack shaping quality can be obtained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage battery manufacturing, in particular to a stack shaping device and a stack shaping method. BACKGROUND

[0002] All-vanadium redox flow battery is a new type of energy storage battery, which realizes the storage and release of electric energy through the oxidation and reduction reaction of vanadium ions in different valence states between the positive and negative electrodes. The all-vanadium flow battery is connected by a plurality of all-vanadium flow battery monomers in a certain way to form a battery pack system with higher voltage, larger capacity and stronger output capacity to meet the demand for electric energy in different application scenarios. The all-vanadium flow battery has high safety, long service life, environmental friendliness and other unique advantages, and has broad market prospects and industry growth.

[0003] In the actual production process of the all-vanadium flow battery, the produced stack needs to be pressed and assembled to ensure that the electrodes, diaphragms and other components between the monomers are in close contact, and the overall mechanical strength of the stack is enhanced. However, the unique multi-layer stacking structure of the stack leads to quality defects such as interlayer misalignment, edge damage of graphite paper (board), sealing gasket leakage, S-shaped bending of the stack, and uneven tension of the long screw rod, which further affects the durability, insulation and sealing of the stack.

[0004] At present, the existing technology mainly controls the press by manual operation when pressing and assembling the stack, and the deformation of the stack is observed visually during pressing and assembling, which has low production efficiency, poor control precision, and poor stack shaping quality. SUMMARY

[0005] The present application aims to solve one of the technical problems in the related art to some extent. To this end, the present application provides a stack shaping device and a stack shaping method.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a stack shaping device, comprising:

[0007] a rack having a bearing position for placing a stack;

[0008] four groups of horizontal pushing and pressing modules arranged on the rack, each group of the horizontal pushing and pressing modules comprising a horizontal driving unit and an elastic pushing and pressing mechanism driven by the horizontal driving unit and capable of moving in the horizontal direction;

[0009] a vertical pushing and pressing module arranged on the rack, the vertical pushing and pressing module comprising a first vertical driving unit, a second vertical driving unit, a first pressing plate driven by the first vertical driving unit and capable of moving in the vertical direction, and a second pressing plate driven by the second vertical driving unit and capable of moving in the vertical direction; and

[0010] a control unit for controlling the horizontal and vertical push modules to work;

[0011] The four horizontal push modules are respectively used to press the four corners of the stack placed in the bearing position through the elastic push mechanism, so that the sheet structures arranged in the stack are aligned.

[0012] The first pressing plate is used to press the top plate in the stack, and the second pressing plate is used to press the screw rod with a compression spring in the stack.

[0013] The application has the following beneficial effects: the stack shaping device can realize automatic shaping and assembling operation of the stack, has high production efficiency and good product consistency. The control unit is used to automatically control the horizontal and vertical push modules, so that higher control precision is realized. Meanwhile, the control unit is used to control the horizontal and vertical push modules to act, so that the horizontal and vertical push modules are pressed multiple times in stages, and the horizontal push module is used to push the corners after pressing, so that the stack is realigned. The misalignment between the layers caused by the pressing process can be corrected by pushing the corners of the stack by the horizontal push module, so that better stack shaping quality is obtained. In addition, the four horizontal push modules are used to push from the four corners, so that higher alignment precision is achieved.

[0014] Optionally, the elastic push mechanism comprises a mounting seat connected with the output end of the horizontal driving unit, an air spring arranged on the mounting seat, and a push block driven by the air spring and capable of moving in the horizontal direction, wherein the push block is provided with a corner groove adapted to the corner of the stack.

[0015] Optionally, the horizontal push module further comprises an elastic member and a linear guide rail, wherein the linear guide rail comprises a track fixedly arranged on the output end of the horizontal driving unit in the vertical direction, and a sliding block slidingly arranged on the track, the mounting seat is fixedly connected with the sliding block, and the elastic member is arranged between the mounting seat and the track to support the elastic push mechanism.

[0016] Optionally, the elastic push mechanism further comprises a first connecting shaft and a second connecting shaft, the first connecting shaft is arranged on the push block and slidingly arranged relative to the second connecting shaft, and the second connecting shaft is connected with the mounting seat through a ball joint.

[0017] Optionally, each of the horizontal push modules comprises at least two groups of elastic push mechanisms distributed in the vertical direction.

[0018] Optionally, the stack shaping device further comprises a third vertical driving unit arranged on the rack, the third vertical driving unit is connected with the four horizontal push modules and used to drive the horizontal push modules to move in the vertical direction, so that the position of the horizontal push modules is adjusted to be adapted to the stack.

[0019] Optionally, the first pressing plate and the second pressing plate are arranged in a spaced manner, and the second pressing plate is provided with a through hole for the first pressing plate to pass through.

[0020] Optionally, the rack comprises a base, a support seat arranged above the base, and a guide column arranged between the base and the support seat, the base has the carrying position, the first vertical driving unit and the second vertical driving unit are arranged on the support seat, and the first pressing plate and the second pressing plate are both slidingly arranged on the guide column.

[0021] Optionally, the stack shaping device further comprises a conveying table arranged through the rack, and the conveying table is used to move the stack relative to the carrying position.

[0022] Optionally, the stack shaping device further comprises a first detection unit and a second detection unit, the first detection unit is used to detect the moving stroke information of each group of horizontal pressing modules and the pressing force information on the stack, the second detection unit is used to detect the moving stroke information of the vertical pressing module and the pressing force information on the stack, and the first detection unit and the second detection unit are both electrically connected or signal connected with the control unit.

[0023] In addition, the application also provides a stack shaping method, which is applied to the control unit in the stack shaping device as described in any one of the above technical solutions, and the stack shaping method comprises the following steps:

[0024] S100: controlling four groups of the horizontal driving units to drive the corresponding elastic pressing mechanisms to move to the corresponding initial shaping positions;

[0025] S200: controlling the first vertical driving unit to drive the first pressing plate to move downward to exert a vertical action force on the stack until a first predetermined pressure value is reached;

[0026] S300: controlling the corresponding horizontal driving unit to drive the elastic pressing mechanism deviating from the initial shaping position in the four groups of elastic pressing mechanisms to move to the initial shaping position again;

[0027] S400: controlling the first vertical driving unit to drive the first pressing plate to continue to move downward to exert a vertical action force on the stack until a second predetermined pressure value is reached, the second predetermined pressure value being greater than the first predetermined pressure value;

[0028] S500: controlling the four groups of horizontal driving units to drive the corresponding elastic pressing mechanisms to move to be separated from the stack, and judging whether the height of the stack reaches a specified height, when the height of the stack reaches the specified height, executing step S600, and when the height of the stack does not reach the specified height, executing step S700 and step S800;

[0029] S600: controlling the second vertical driving unit to drive the second pressing plate to move downward to exert a vertical force on the screw rod of the stack until a specified pressure value is reached;

[0030] S700: controlling the first vertical driving unit to drive the first pressing plate to continue to move downward to exert a vertical force on the stack until the height of the stack reaches a specified height, and recording a corresponding vertical pressure value as a third predetermined pressure value, which is greater than the second predetermined pressure value;

[0031] S800: controlling the four sets of horizontal driving units to drive the corresponding elastic pressing mechanisms to move to the corresponding initial shaping positions, and then repeating step S500.

[0032] The stack shaping method provided in the present application has similar beneficial effects to the reasoning process of the aforementioned stack shaping device, and will not be described here again.

[0033] Optionally, controlling any elastic pressing mechanism in the four sets of horizontal pressing modules to move to an initial shaping position comprises:

[0034] dividing the entire movement process into at least two stages;

[0035] In each stage, the elastic pressing mechanism is controlled to move at a preset speed; wherein the preset speed gradually decreases with the increase of the stage number;

[0036] During the movement of the elastic pressing mechanism, the pressing force value and the movement stroke of the elastic pressing mechanism are obtained;

[0037] When the pressing force value reaches a preset horizontal pressure value or the movement stroke reaches a preset stroke, it is determined that the elastic pressing mechanism moves to the initial shaping position.

[0038] Optionally, the control of the first vertical driving unit to drive the first pressing plate to move downward to exert a vertical force on the stack in step S200 comprises: controlling the first vertical driving unit to drive the first pressing plate to exert a vertical force on the stack in a manner that the vertical force increases according to a 1 / 4 sine curve.

[0039] The control of the first vertical driving unit to drive the first pressing plate to continue to move downward to exert a vertical force on the stack in step S400 and step S700 comprises: controlling the first vertical driving unit to drive the first pressing plate to exert a vertical force on the stack in a manner that the vertical force increases according to a 1 / 2 cosine curve.

[0040] Optionally, the control of the second vertical driving unit to drive the second pressing plate to move downward to exert a vertical force on the stack in step S600 comprises:

[0041] The second vertical driving unit is controlled to drive the second pressing plate to apply the vertical force to the screw rod of the stack in a 1 / 4 sinusoidal curve increasing manner.

[0042] The features and advantages of the present application will be more apparent from the following detailed description in conjunction with the accompanying drawings. The best mode or means for carrying out the present application will be described in detail in conjunction with the accompanying drawings, but the present application is not limited thereto. In addition, the features, elements and components appearing in each of the following and the accompanying drawings are multiple, and are marked with different symbols or numbers for the convenience of representation, but all represent the same or similar structures or functions. BRIEF DESCRIPTION OF DRAWINGS

[0043] The present application will be further described in conjunction with the accompanying drawings:

[0044] Figure 1 A structural schematic diagram of a stack shaping device provided for the present embodiment;

[0045] Figure 2 A top view schematic diagram before stack shaping;

[0046] Figure 3 A structural schematic diagram after stack shaping;

[0047] Figure 4 A top view schematic diagram after stack shaping;

[0048] Figure 5 A schematic diagram of four groups of horizontal pushing and pressing modules pressing the stack from four corner portions of the stack;

[0049] Figure 6 A structural schematic diagram of the elastic pushing and pressing mechanism;

[0050] Figure 7 A side view of the elastic pushing and pressing mechanism;

[0051] Figure 8 A structural schematic diagram of the vertical pushing and pressing module;

[0052] Figure 9 A side view of the vertical pushing and pressing module;

[0053] Figure 10 A timing relationship diagram between the horizontal displacement amount S of the stack, the stack height H, the pressing force F of the first pressing plate on the stack and the pressing force f of the second pressing plate on the stack during one shaping operation.

[0054] 1, rack; 10, base; 11, guide column; 12, support seat; 2, horizontal pushing and pressing module; 20, horizontal driving unit; 200, servo motor; 201, fixed seat; 202, sliding rail structure; 21, elastic pushing and pressing mechanism; 210, mounting seat; 211, gas spring; 212, pushing block; 213, first connecting shaft; 214, second connecting shaft; 215, ball joint; 22, elastic member; 23, linear guide rail; 230, track; 231, sliding block; 24, connecting seat; 3, vertical pushing and pressing module; 30, first vertical driving unit; 31, first pressing plate; 32, second vertical driving unit; 33, second pressing plate; 330, perforation; 4, third vertical driving unit; 5, conveying table; 6, electric pile; 60, sheet body; 61, screw rod. DETAILED DESCRIPTION

[0055] Embodiments of the present application are described below in detail with reference to examples shown in the accompanying drawings, wherein the same or similar notations are used to represent the same or similar elements or elements having the same or similar functions throughout. Based on the embodiments in the embodiments, it is intended to explain the present application, and cannot be understood as a limitation of the present application.

[0056] In the present specification, "one embodiment" or "an embodiment" or "example" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. The appearance of the phrase "in one embodiment" in various places in the specification is not necessarily all referring to the same embodiment.

[0057] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified and limited.

[0058] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood broadly, for example, it can be fixedly connected, or connected through an intermediate medium, or the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] The present embodiment provides an electric pile shaping device, such as Figures 1 to 9As shown, the stack shaping device comprises a rack 1, four sets of horizontal pushing and pressing modules 2, a vertical pushing and pressing module 3 and a control unit. The rack 1 has a bearing position for placing a stack 6, and the four sets of horizontal pushing and pressing modules 2 and the vertical pushing and pressing module 3 are arranged on the rack 1. Each set of horizontal pushing and pressing modules 2 comprises a horizontal driving unit 20 and an elastic pushing mechanism 21 driven by the horizontal driving unit 20 and capable of moving in a horizontal direction. The vertical pushing and pressing module 3 comprises a first vertical driving unit 30, a second vertical driving unit 32, a first pressing plate 31 driven by the first vertical driving unit 30 and capable of moving in a vertical direction, and a second pressing plate 33 driven by the second vertical driving unit 32 and capable of moving in a vertical direction. The control unit is used to control the working of the horizontal pushing and pressing modules 2 and the vertical pushing and pressing module 3.

[0060] The four sets of horizontal pushing and pressing modules 2 in the embodiment are respectively used to press the four corner portions of the stack 6 placed on the bearing position through the elastic pushing mechanism 21, so as to align the structure of the sheet bodies 60 arranged in stack in the stack 6. The first pressing plate 31 is used to press the top plate in the stack 6, and the second pressing plate 33 is used to press the screw rod 61 with a compression spring in the stack 6. The stack shaping device provided by the embodiment can realize automatic shaping and assembling operation of the stack 6, has high production efficiency and good product consistency. Through automatic control of the horizontal pushing and pressing modules 2 and the vertical pushing and pressing module 3 by the control unit, higher control precision is realized. Meanwhile, the horizontal pushing and pressing modules 2 and the vertical pushing and pressing module 3 can be controlled respectively by the control unit, and the horizontal pushing and pressing modules 2 can push the corner portions after multiple times of pressing in stages, so as to realign the stack 6. The problem of layer misalignment caused by the pressing process can be corrected by pushing the corner portions of the stack 6 through the horizontal pushing and pressing modules 2, so as to achieve realignment, thereby obtaining better stack shaping quality. In addition, through the cooperation of the four sets of horizontal pushing and pressing modules 2 for pushing from the four corner portions, higher alignment precision can be achieved.

[0061] As shown in Figure 2 Before the shaping operation, the sheet bodies 60 in the stack 6 are arranged in stack and have the problem of layer misalignment. As shown in Figure 1 The stack shaping device further comprises a conveying table 5 arranged through the rack 1, and the conveying table 5 is used to move the stack 6 into and out of the bearing position. The stack 6 can be moved into the bearing position by the conveying table 5 before the shaping operation, so as to subsequently perform the shaping operation. For the convenience of description, the conveying table 5 is shown in Figure 3 and Figure 4As shown, in this embodiment, the pressure applied to the fuel cell stack 6 by two sets of horizontal pressing modules 2 is denoted as direction D and the opposite direction of direction D, and the pressure applied to the fuel cell stack 6 by the other two sets of horizontal pressing modules 2 is denoted as direction P and the opposite direction of direction P. Meanwhile, in this embodiment, the pressure applied to the fuel cell stack 6 by the vertical pressing module 3 is denoted as direction G. Furthermore, the length direction of the fuel cell stack 6 is denoted as the Y direction, the width direction as the X direction, and the height direction as the Z direction.

[0062] like Figure 5 As shown, when the fuel cell stack forming equipment is used to form the fuel cell stack 6 located in the bearing position, the fuel cell stack 6 is first formed horizontally by the horizontal pushing module 2. Specifically, the control unit first controls four sets of horizontal drive units 20 to drive the corresponding elastic pushing mechanism 21 to the corresponding initial forming position. The initial forming position refers to the position where the edges of the misaligned sheets 60 can be aligned after the elastic pushing mechanism 21 moves to that position.

[0063] Combination Figure 6 and Figure 7 As shown, the elastic pushing mechanism 21 in this embodiment includes a mounting base 210 connected to the output end of the horizontal drive unit 20, a gas spring 211 disposed on the mounting base 210, and a push block 212 that is driven by the gas spring 211 and can move horizontally. The push block 212 is provided with a corner groove for fitting with the corner of the fuel cell stack 6. The elastic pushing mechanism 21 contacts and applies pressure to the corner of the fuel cell stack 6 through the corner groove on the push block 212. In this way, the two sets of opposing elastic pushing mechanisms 21 can cooperate to play a "clamping" effect during the pushing process of the fuel cell stack 6, which facilitates the reshaping and alignment of the misaligned sheets 60. In addition, by providing the gas spring 211, after the push block 212 contacts and applies pressure to the corner of the fuel cell stack 6, the buffering function of the gas spring 211 can prevent the push block 212 from rigidly impacting the fuel cell stack 6, thus preventing damage to the fuel cell stack 6. Similarly, in this embodiment, an elastic structure is also provided on the inner wall of the corner groove of the push block 212 to further reduce the impact force between the push block 212 and the fuel cell stack 6. The elastic structure can be a rubber pad, silicone pad, etc. Before starting the shaping operation, the output pressure value of the gas spring 211 is preset according to the model of the fuel cell stack 6.

[0064] Afterwards, the first vertical driving unit 30 is controlled by the control unit to drive the first pressing plate 31 to move downwards to exert a vertical force on the stack 6 until a first predetermined pressure value is reached. The pressing of the stack 6 is a necessary step to ensure that the components such as electrodes and separators between the single cells in the stack 6 are in close contact, which can enhance the overall mechanical strength of the stack 6. It is easy to understand that the height dimension of the stack 6 as a whole will decrease after the stack 6 is pressed downwards by the first pressing plate 31. In order to avoid damage caused by the corner of the stack 6 rubbing against the inner wall of the corner groove of the push block 212, the horizontal pushing module 2 in the embodiment is also designed so that the elastic pushing mechanism 21 can move downwards along with the stack 6 during the pressing process of the stack 6, thereby avoiding relative friction between the push block 212 and the stack 6 in the vertical direction. Specifically, the horizontal pushing module 2 in the embodiment further includes an elastic member 22 and a linear guide rail 23, the linear guide rail 23 includes a track 230 fixedly arranged on the output end of the horizontal driving unit 20 in the vertical direction and a sliding block 231 slidingly arranged on the track 230, the mounting seat 210 is fixedly connected to the sliding block 231, and the elastic member 22 is arranged between the mounting seat 210 and the track 230 to support the elastic pushing mechanism 21. Through the above structural design, when the stack 6 is pressed to be thinned, the elastic pushing mechanism 21 and the sliding block 231 can be driven to slide along the track 230 by the static friction of the push block 212, thereby avoiding sliding friction between the stack 6 and the elastic pushing mechanism 21. The elastic member 22 in the embodiment is a compression spring, that is, when not subjected to pressure in the vertical direction, the elastic pushing mechanism 21 is fixed relative to the track 230 by the supporting action of the compression spring; when the stack 6 is pressed to be thinned, the elastic pushing mechanism 21 is pressed on the compression spring by the static friction of the stack 6 to slide relative to the track 230.

[0065] Further, as shown in Figure 6 the elastic pushing mechanism 21 in the embodiment further includes a first connecting shaft 213 and a second connecting shaft 214, the first connecting shaft 213 is arranged on the push block 212 and slidingly arranged relative to the second connecting shaft 214, and the second connecting shaft 214 is connected to the mounting seat 210 through a ball joint 215. Through the above structural design, the flexibility of the push block 212 can be enhanced, and the push block 212 can move or sway relative to the mounting seat 210 through the first connecting shaft 213 and the second connecting shaft 214 which can slide relative to each other and the ball joint 215 which can move in all directions. In this way, the adaptability of the push block 212 in the shaping process of the stack can be improved, and the risk of rubbing between the push block 212 and the corner of the stack 6 can be further reduced.

[0066] Each of the horizontal pushing and pressing mold groups 2 in the embodiment comprises two groups of elastic pushing and pressing mechanisms 21 arranged in the vertical direction. It is easily understood that in other alternative embodiments, one group or three or more groups of elastic pushing and pressing mechanisms 21 can also be arranged in each of the horizontal pushing and pressing mold groups 2. The number of groups of the elastic pushing and pressing mechanisms 21 can be designed according to the specific structure of the electric pile 6. When the outer part of the sheet material in the electric pile 6 is provided with one or more groups of outer frames in the height direction, in order to avoid the above-mentioned outer frames, it is necessary to arrange multiple groups of elastic pushing and pressing mechanisms 21 arranged at intervals.

[0067] In addition, as shown in Figure 1 and Figure 6 , the electric pile shaping device provided in the embodiment further comprises a third vertical driving unit 4 arranged on the rack 1, the third vertical driving unit 4 is connected with the four groups of horizontal pushing and pressing mold groups 2 and is used to drive the horizontal pushing and pressing mold groups 2 to move in the vertical direction, so as to adjust the position of the horizontal pushing and pressing mold groups 2 to be adapted to the electric pile 6. By arranging the third vertical driving unit 4, the height position of the horizontal pushing and pressing mold groups 2 can be adaptively adjusted according to the shaping requirements of the electric pile 6 with different height dimensions, so that the elastic pushing and pressing mechanisms 21 in the horizontal pushing and pressing mold groups 2 are located at the approximate middle position relative to the electric pile 6. The third vertical driving unit 4 can drive the horizontal pushing and pressing mold groups 2 to move up and down according to the overall height value of the electric pile 6 before the shaping operation starts, so that the horizontal pushing and pressing mold groups 2 are in the appropriate position before the shaping operation starts. Of course, after the shaping operation is performed, if the height dimension of the electric pile 6 changes greatly due to pressing and assembling, the third vertical driving unit 4 can also be used to drive the horizontal pushing and pressing mold groups 2 to move downward for adaptive adjustment as needed.

[0068] Specifically, the horizontal pushing and pressing mold groups 2 in the embodiment further comprise a connecting seat 24 arranged on the rack 1. The output end of the third vertical driving unit 4 is connected with the connecting seat 24, and the horizontal driving unit 20 is arranged on the connecting seat 24 as a whole, so that the third vertical driving unit 4 can drive the horizontal pushing and pressing mold groups 2 to move up and down as a whole. In the embodiment, the horizontal driving unit 20 comprises a servo motor 200, a fixed seat 201 and a sliding rail structure 202. The fixed seat 201 is mounted to the connecting seat 24, the sliding rail structure 202 and the servo motor 200 are mounted to the fixed seat 201, the elastic pushing and pressing mechanisms 21 are slidably arranged on the fixed seat 201 through the sliding rail structure 202, and the output end of the servo motor 200 is connected with the top end of the track 230 in the elastic pushing and pressing mechanism 21.

[0069] In combination with Figure 1 , Figure 8 and Figure 9As shown, the rack 1 in the embodiment includes a base 10, a support seat 12 arranged above the base 10, and a guide column 11 arranged between the base 10 and the support seat 12. The base 10 has a bearing position, the first vertical driving unit 30, the second vertical driving unit 32, and the third vertical driving unit 4 are all arranged on the support seat 12, and the first pressing plate 31, the second pressing plate 33, and the connecting seat 24 are all slidingly arranged on the guide column 11. The first vertical driving unit 30, the second vertical driving unit 32, and the third vertical driving unit 4 in the embodiment are all air cylinders, and the arrangement mode and working principle of the three are all common technologies, which will not be described here.

[0070] In order to save layout space and facilitate the pressing action of the first pressing plate 31 and the second pressing plate 33, the first pressing plate 31 and the second pressing plate 33 in the embodiment are arranged at intervals, and the second pressing plate 33 is provided with a perforation 330 for the first pressing plate 31 to pass through.

[0071] The stack shaping device in the embodiment further includes a first detection unit and a second detection unit, the first detection unit is used for detecting the moving stroke information of each group of horizontal pressing module 2 and the pressing force information on the stack 6, and the second detection unit is used for detecting the moving stroke information of the vertical pressing module 3 and the pressing force information on the stack 6, and the first detection unit and the second detection unit are electrically connected or signal connected with the control unit. By arranging the first detection unit and the second detection unit, the control unit can collect feedback parameter information and control the horizontal pressing module 2 and the vertical pressing module 3 according to the parameter information. The moving stroke information of the horizontal pressing module 2 refers to the moving distance value of the push block 212 in the horizontal pressing module 2, and the pressing force information of the horizontal pressing module 2 on the stack 6 refers to the pressure value applied by the push block 212 in the horizontal pressing module 2 on the stack 6. Similarly, the moving stroke information of the vertical pressing module 3 includes the moving distance value of the first pressing plate 31 and the second pressing plate 33 in the vertical pressing module 3, and the pressing force information of the vertical pressing module 3 on the stack includes the applied pressure value of the first pressing plate 31 on the stack 6 and the applied pressure value of the second pressing plate 33 on the stack 6. Each of the above moving distance values and applied pressure values can be detected by a distance measuring sensor and a pressure sensor, which will not be described here.

[0072] In combination Figure 10 As shown, the stack shaping method for performing the stack shaping operation on the stack 6 by using the stack shaping device provided in the embodiment is described as follows:

[0073] The stack shaping method is applied to the control unit in the stack shaping device, and the control unit performs the following control steps on the horizontal pressing module 2 and the vertical pressing module 3 according to the stack shaping method:

[0074] Step S100: control the four sets of horizontal driving units 20 to drive the corresponding elastic pushing mechanisms 21 to move to the corresponding initial shaping positions; as previously described, the initial shaping position refers to a position where the elastic pushing mechanism 21 can move to the position and align the edges of the interlaminar misaligned sheet body 60, and this step completes the first shaping in the horizontal direction. Referring to Figure 10 As shown in the figure, the step corresponds to the period from 0 to T1, the height H of the stack 6, the pressing force F of the first pressing plate 31 on the stack 6, and the pressing force f of the second pressing plate 33 on the stack 6 do not change, and the horizontal displacement S of the stack 6 gradually increases from 0.

[0075] Step S200: control the first vertical driving unit 30 to drive the first pressing plate 31 to move downward to apply a vertical force to the stack 6 until a first predetermined pressure value is reached; this step corresponds to the period from T1 to T2, the horizontal displacement S of the stack 6 and the pressing force f of the second pressing plate 33 on the stack 6 do not change, the height H of the stack 6 gradually decreases due to the pressing, and the pressing force F of the first pressing plate 31 on the stack 6 gradually increases. In addition, in this embodiment, the first vertical driving unit 30 is controlled to drive the first pressing plate 31 to apply a vertical force to the stack 6 in a 1 / 4 sine curve increasing manner. In this way, gradually increasing the pressure and slowing down the pressure increasing speed as the pressure increases can reduce the probability of the stack 6 sliding against the elastic pushing mechanism 21. During this process, the four sets of horizontal pushing modules 2 maintain the pressing on the four corners of the stack 6, which can prevent the stack 6 from reappearing obvious interlaminar misalignment due to the pressing, so the horizontal displacement S of the stack 6 does not change during this process. However, the horizontal size of the stack 6 as a whole will change due to the pressing, which in turn will cause the elastic pushing mechanism 21 to deviate from the initial shaping position.

[0076] Step S300: control the corresponding horizontal driving unit 20 to drive the elastic pushing mechanism 21 deviating from the initial shaping position among the four sets of elastic pushing mechanisms 21 to move back to the initial shaping position; this step corresponds to the period from T2 to T3, which is equivalent to the second shaping of the stack 6. The height H of the stack 6, the pressing force F of the first pressing plate 31 on the stack 6, and the pressing force f of the second pressing plate 33 on the stack 6 do not change, and the horizontal displacement S of the stack 6 gradually increases.

[0077] Step S400: control the first vertical driving unit 30 to drive the first pressing plate 31 to continue to move downward to apply vertical force to the stack 6 until a second predetermined pressure value is reached, the second predetermined pressure value is greater than the first predetermined pressure value; the step process corresponds to the T3 to T4 time period, for further pressure packaging of the stack 6. In this step process, the height H of the stack 6 is further reduced, the pressure F of the first pressing plate 31 on the stack 6 gradually increases, and the pressure f of the second pressing plate 33 on the stack 6 and the horizontal displacement S of the stack 6 do not change. In addition, in this embodiment, the vertical force is increased according to the 1 / 2 cosine curve in the step stage to control the first vertical driving unit 30 to drive the first pressing plate 31 to apply vertical force to the stack 6. In this way, the slow increase, then the rapid increase, and then the slow increase of the pressure can improve the pressure packaging effect.

[0078] Step S500: control the four groups of horizontal driving units 20 to drive the corresponding elastic pushing mechanisms 21 to move away from the stack 6, and judge whether the height of the stack 6 reaches the specified height, if the height of the stack 6 reaches the specified height, execute step S600, if the height of the stack 6 does not reach the specified height, execute step S700 and step S800. This step is a judgment step, which does not correspond to the time sequence in Figure 10 If it is judged that the height of the stack 6 reaches the specified height in this step, it is considered that the pressure packaging of the first pressing plate 31 on the stack 6 is in place, and then step S600 is performed to use the second pressing plate 33 to pressure package the screw rod 61 of the stack 6. If it is judged that the height of the stack 6 does not reach the specified height, it is considered that the pressure packaging of the first pressing plate 31 on the stack 6 is not in place, and the first pressing plate 31 needs to be used again to pressure package the stack 6.

[0079] Step S600: control the second vertical driving unit 32 to drive the second pressing plate 33 to move downward to apply vertical force to the screw rod 61 of the stack 6 until a specified pressure value is reached; this step corresponds to the T4 to T5 time period, the height H of the stack 6, the pressure F of the first pressing plate 31 on the stack 6, and the horizontal displacement S of the stack 6 do not change, and the pressure f of the second pressing plate 33 on the stack 6 gradually increases. In this embodiment, the vertical force is increased according to the 1 / 4 sine curve to control the second vertical driving unit 32 to drive the second pressing plate 33 to apply vertical force to the screw rod 61 of the stack 6.

[0080] Step S700: control the first vertical driving unit 30 to drive the first pressing plate 31 to continue to move downward to apply vertical force to the stack 6 until the height of the stack 6 reaches the specified height, and record the corresponding vertical pressure value as the third predetermined pressure value, the third predetermined pressure value is greater than the second predetermined pressure value; in this step, the vertical force can also be increased according to the 1 / 2 cosine curve to control the first vertical driving unit 30 to drive the first pressing plate 31 to apply vertical force to the stack 6.

[0081] Step S800: control the four groups of horizontal driving units 20 to drive the corresponding elastic pushing mechanisms 21 to move to the corresponding initial shaping position, and then repeat step S500. Steps S700 and S800 can be repeated multiple times, step S700 is used to press the stack 6 by the first pressing plate 31, the purpose is to make the height of the stack 6 reach the specified height. Step S800 is used to reshape and align the stack 6 again by the elastic pushing mechanism 21.

[0082] Further, for step S100, control any one of the four groups of horizontal pushing modules 2 to move to the initial shaping position, including the following steps:

[0083] Step S110: divide the entire movement process into at least two stages;

[0084] Step S120: in each stage, control the elastic pushing mechanism 21 to move at a preset speed; wherein the preset speed gradually decreases with the increase of the stage number;

[0085] Step S130: during the movement of the elastic pushing mechanism 21, the pressing force value and the movement stroke of the elastic pushing mechanism 21 are obtained; specifically, the movement distance value of the pushing block 212 and the pressure value applied to the stack 6 are obtained.

[0086] Step S140: when the pressing force value reaches a preset level pressure value or the movement stroke reaches a preset stroke, determine that the elastic pushing mechanism 21 moves to the initial shaping position.

[0087] The above control scheme for step S100 can improve the displacement control accuracy of the elastic pushing mechanism 21. Specifically, the control strategy of "fast first, slow second, and micro later" is adopted by controlling the feed pitch by the servo motor 200. "Fast first" focuses on the safety stroke before feeding, "slow second" focuses on slow pushing after the pushing block 212 just contacts the stack 6, and the buffer support effect of the gas spring 211 with a preset output pressure value is used to ensure that there is no rigid impact between the pushing block 212 and the stack 6, and to avoid damaging the stack 6. "Later micro" focuses on maintaining the shape when the sampling value of the first detection unit reaches the preset value.

[0088] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification that does not deviate from the functional and structural principles of the present application shall be included in the scope of the claims.

Claims

1. A stack shaper apparatus, characterized by, The application relates to a battery shaping device, which comprises: a rack having a bearing position for placing a battery stack; four groups of horizontal pressing modules arranged on the rack, each group of the horizontal pressing modules comprising a horizontal driving unit and an elastic pressing mechanism capable of moving along a horizontal direction driven by the horizontal driving unit; a vertical pressing module arranged on the rack, the vertical pressing module comprising a first vertical driving unit, a second vertical driving unit, a first pressing plate capable of moving along a vertical direction driven by the first vertical driving unit, and a second pressing plate capable of moving along a vertical direction driven by the second vertical driving unit; and a control unit for controlling the horizontal pressing modules and the vertical pressing module to work; wherein the four groups of horizontal pressing modules are respectively used for pressing four corner portions of the battery stack placed on the bearing position through the elastic pressing mechanism, so that the sheet structure arranged in the battery stack is aligned. The first pressing plate is used for pressing a top plate in the battery stack, and the second pressing plate is used for pressing a screw rod with a compression spring in the battery stack.

2. The stack shaper device of claim 1, wherein, The elastic pressing mechanism comprises a mounting seat connected with an output end of the horizontal driving unit, an air spring arranged on the mounting seat, and a pushing block capable of moving along a horizontal direction driven by the air spring, wherein the pushing block is provided with a corner groove for matching the corner portion of the battery stack.

3. The stack shaper device of claim 2, wherein, The horizontal pressing module further comprises an elastic member and a linear guide rail, the linear guide rail comprising a track fixedly arranged on the output end of the horizontal driving unit along a vertical direction, and a sliding block slidingly arranged on the track, the mounting seat being fixedly connected with the sliding block, and the elastic member being arranged between the mounting seat and the track to support the elastic pressing mechanism.

4. The stack shaper device of claim 2, wherein, The elastic pressing mechanism further comprises a first connecting shaft and a second connecting shaft, the first connecting shaft being arranged on the pushing block and slidingly arranged relative to the second connecting shaft, and the second connecting shaft being connected with the mounting seat through a ball joint.

5. The stack shaper device of claim 2, wherein, Each group of the horizontal pressing modules comprises at least two groups of elastic pressing mechanisms which are distributed along a vertical direction.

6. The stack shaper device of claim 1, wherein, The battery shaping device further comprises a third vertical driving unit arranged on the rack, the third vertical driving unit being connected with the four groups of horizontal pressing modules and used for driving the horizontal pressing modules to move along a vertical direction, so as to adjust the position of the horizontal pressing modules to match the battery stack.

7. The stack shapmg apparatus of any one of claims 1 to 6, wherein, The first pressing plate and the second pressing plate are arranged in a spaced manner, and the second pressing plate is provided with a perforation for the first pressing plate to pass through.

8. The stack shaper device of claim 7, wherein, The rack comprises a base, a supporting seat arranged above the base, and a guide column arranged between the base and the supporting seat, the base having the bearing position, the first vertical driving unit and the second vertical driving unit being arranged on the supporting seat, and the first pressing plate and the second pressing plate being slidingly arranged on the guide column.

9. The stack shapmg apparatus of any one of claims 1 to 6, wherein, The battery shaping device further comprises a conveying table arranged through the rack, the conveying table being used for moving the battery stack in and out relative to the bearing position.

10. The stack shapmg apparatus of any one of claims 1 to 6, wherein, The stack shaping device further comprises a first detection unit and a second detection unit, the first detection unit is used for detecting the moving stroke information of each group of horizontal push-pressing module groups and the push-pressing pressure information on the stack, and the second detection unit is used for detecting the moving stroke information of the vertical push-pressing module group and the push-pressing pressure information on the stack, and the first detection unit and the second detection unit are electrically connected or signal-connected with the control unit.

11. A method of stack reshaping, characterized by, The stack shaping method is applied to the control unit in the stack shaping device as claimed in any one of claims 1 to 10, and the stack shaping method comprises the following steps: S100: controlling four groups of the horizontal drive units to drive the corresponding elastic push-pressing mechanisms to move to the corresponding initial shaping positions; S200: controlling the first vertical drive unit to drive the first pressing plate to move downward to apply a vertical action force on the stack until a first predetermined pressure value is reached; S300: controlling the corresponding horizontal drive unit to drive the elastic push-pressing mechanism deviating from the initial shaping position in the four groups of elastic push-pressing mechanisms to move to the initial shaping position again; S400: controlling the first vertical drive unit to drive the first pressing plate to continue to move downward to apply a vertical action force on the stack until a second predetermined pressure value is reached, the second predetermined pressure value being greater than the first predetermined pressure value; S500: controlling four groups of horizontal drive units to drive the corresponding elastic push-pressing mechanisms to move to be separated from the stack, and judging whether the height of the stack reaches a specified height, when the height of the stack reaches the specified height, step S600 is executed, when the height of the stack does not reach the specified height, steps S700 and S800 are executed; S600: controlling the second vertical drive unit to drive the second pressing plate to move downward to apply a vertical action force on the screw rod of the stack until a specified pressure value is reached; S700: controlling the first vertical drive unit to drive the first pressing plate to continue to move downward to apply a vertical action force on the stack until the height of the stack reaches the specified height, and recording the corresponding vertical pressure value as a third predetermined pressure value, the third predetermined pressure value being greater than the second predetermined pressure value; S800: controlling four groups of the horizontal drive units to drive the corresponding elastic push-pressing mechanisms to move to the corresponding initial shaping positions, and then repeating step S500.

12. The stack shaping method of claim 11, wherein, Controlling any elastic push-pressing mechanism in four groups of the horizontal push-pressing module groups to move to the initial shaping position comprises: dividing the whole moving process into at least two stages; in each stage, controlling the elastic push-pressing mechanism to move at a preset speed; wherein the preset speed gradually decreases with the increase of the stage number; in the process of moving the elastic push-pressing mechanism, acquiring the pressing pressure value and the moving stroke of the elastic push-pressing mechanism; when the pressing pressure value reaches a preset horizontal pressure value or the moving stroke reaches a preset stroke, determining that the elastic push-pressing mechanism moves to the initial shaping position.

13. The stack shaping method according to claim 11 or 12, wherein The control of the first vertical drive unit to drive the first pressing plate to move downward to apply a vertical action force on the stack in step S200 comprises: controlling the first vertical drive unit to drive the first pressing plate to apply a vertical action force on the stack in a manner that the vertical action force increases according to a 1 / 4 sine curve. The control of the first vertical driving unit to drive the first pressing plate to continue to move downward to apply a vertical acting force to the stack in steps S400 and S700 comprises: controlling the first vertical driving unit to drive the first pressing plate to apply a vertical acting force to the stack in a manner that the vertical acting force is increased according to a 1 / 2 cosine curve.

14. The stack shaping method of claim 13, wherein, The control of the second vertical driving unit to drive the second pressing plate to move downward to apply a vertical acting force to the stack in step S600 comprises: controlling the second vertical driving unit to drive the second pressing plate to apply a vertical acting force to the screw rod of the stack in a manner that the vertical acting force is increased according to a 1 / 4 sine curve.

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