Stacking detection indicating device, galvanic pile assembling equipment and galvanic pile assembling method

Abstract

The invention discloses a stack detection indicating device, stack assembly equipment and a stack assembly method.The stack detection indicating device comprises a base and a workbench, the base is provided with the stack detection indicating device acting on workpieces, the stack detection indicating device is provided with a plurality of contact type detection units distributed in an array mode, and each contact type detection unit comprises a positioning contact; the detection points of all the positioning contacts are in the same plane. Once the positioning contact is triggered by a single sheet-shaped object to generate displacement, the signal triggering and indicating module can generate a specific triggering signal corresponding to the detection unit, and the specific triggering signal can be detected through a visual indicating means, such as lightening an indicating lamp at a specific position or presenting a specific mark on a display screen. The position of the workpiece corresponding to the triggered detection unit is indicated, whether stacking deviation occurs or not is judged according to the position of the workpiece, and then the deviated workpiece is corrected; under the action of the equipment disclosed by the invention, the position error among the components and the overall form and position error in the assembly process of the galvanic pile can be effectively ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell stack manufacturing, and in particular to a stack detection indicating device, a stack assembly device and a stack assembly method. Background Art

[0002] The fuel cell stack is the place where electrochemical reactions occur and is the core part of the fuel cell system (or fuel cell engine). When the stack is working, hydrogen and oxygen are distributed to the bipolar plates of each single cell through the main gas channel of the stack, and are evenly distributed to the electrodes through the bipolar plate guide. The electrochemical reaction occurs through contact with the catalyst through the electrode support. The fuel cell stack is composed of multiple fuel cell monomers stacked in series. The bipolar plates and membrane electrode MEA are alternately stacked, and seals are embedded between the monomers. After the front and rear end plates are pressed, they are tightened with screws to form a fuel cell stack. Fig. 9 shown.

[0003] Currently, the assembly of battery stacks is divided into manual assembly and semi-automatic modes. Manual assembly is composed of workers manually obtaining and placing each component of the battery stack separately: end plates, insulators, conductive plates, bipolar plates, sealed MEA, bipolar plates, etc. (all referred to as workpieces in the text). Workers build the battery stack in sequence (vertically) and then bind the single cells with metal compression bands. At a higher production level, the battery stack assembly is semi-automatic, and the repeating units of about 380 battery cells are assembled by automatic fixtures.

[0004] Since the stacking of membrane electrodes and bipolar plates in the fuel cell stack is the majority, the specific number depends on the battery size, generally about 3 square meters of assembly, so this requires a large number of membrane electrodes and bipolar plates. The stack materials include parts with large rigidity such as bipolar plates, and flexible parts such as MEA and seals. The thickness of bipolar plates, membrane electrodes, and seals are all in the form of millimeter-level sheets. Therefore, whether it is manual assembly or semi-automatic assembly, the stacking of a large number of bipolar plates and a large number of membrane electrodes during the stack assembly process inevitably has displacement error problems. In the existing field, in order to solve the problem of stacking misalignment, positioning holes are generally designed on all components such as membrane electrodes, bipolar plates, and sealing gaskets. Then, positioning rods are used in the stacking process. After the stacking is completed, the positioning rods are pulled out. This method undoubtedly increases the process of drilling positioning holes in each component. Secondly, facing the larger volume of the stack components, the process of extracting the positioning rods is undoubtedly difficult. Therefore, it is very necessary to use professional tooling equipment to ensure the position error and overall shape and position error between the components of the stack during assembly. Summary of the invention

[0005] The purpose of the present invention is to provide a battery stack assembly auxiliary device, which has the advantage of being able to effectively ensure the position error between components and the overall shape and position error of the battery stack during the assembly process.

[0006] The technical means adopted by the present invention are as follows:

[0007] A stack detection and indication device is provided, which is provided with a plurality of contact detection units distributed in an array, each of which includes a positioning contact, and the detection points of all the positioning contacts are in the same plane; the positioning contact is connected to an elastic reset element, and the reset elastic force provided by the elastic reset element is smaller than the friction force between adjacent single pieces in the stacked workpieces, so that when the positioning contact is reset after being triggered to move, its reset force is insufficient to cause the single piece of workpiece to move; each contact detection unit is also connected to a signal trigger and indication module, and once the positioning contact is triggered by a single piece to move, the signal trigger and indication module will generate a specific trigger signal corresponding to the detection unit, and indicate the workpiece position corresponding to the triggered detection unit;

[0008] Furthermore, the stack detection indicating device is fixed on a three-dimensional adjustment mechanism, and the three-dimensional adjustment mechanism can drive the stack detection indicating device to move in three directions of X, Y and Z.

[0009] The present invention is further configured to include: a monitoring box, the monitoring box is fixed to the three-dimensional adjustment mechanism, and the contact detection units distributed in an array on the stacking detection indicating device are arranged on a side of the monitoring box close to the workbench and distributed along the length and width direction of the monitoring box; the positioning contact performs a linear sliding motion in the monitoring box along the direction of approaching and away from the workbench;

[0010] The positioning contact is located in the monitoring box, and is provided with a developing head at one end away from the workpiece. The side of the monitoring box close to the workbench is the front side, and the side opposite to the front side is the back side. The developing head can contact the back side of the monitoring box. The monitoring box is provided with a lighting device acting on the back side.

[0011] The battery stack assembly equipment also includes a CCD visual inspection system near the back of the monitoring box.

[0012] The present invention is further configured as follows: the monitoring box is made of a PC light guide plate;

[0013] The positioning contact is a non-metal cylindrical shape, and the developing head is a black pigment coated on the smaller diameter end of the positioning contact;

[0014] The lighting device is an LED lamp.

[0015] The present invention is further configured as follows: the diameter of the positioning contact is 1-2 mm, the spacing between every two positioning contacts is 0.5-1 mm, and the linear displacement of the positioning contact in the monitoring box is 1.5-4 cm;

[0016] The elastic reset element adopts a micro spring, and the elastic force is 0.05-0.2N.

[0017] The present invention is further configured as follows: a scale coordinate axis is provided on the front side of the monitoring box along the arrangement orientation of the positioning contacts, and a scale coordinate axis is also correspondingly provided on the back side of the monitoring box.

[0018] A battery stack assembly device, comprising the above-mentioned stack detection indicating device, an intelligent mechanical arm, a stack pressing device, a display and a PLC system;

[0019] The intelligent robotic arm grasps the workpiece and places it on the workbench;

[0020] The stack pressing device includes a preliminary positioning mechanism for the stack assembly after stacking and a central pressing platform for compacting the stack assembly;

[0021] The PLC system is respectively connected with the three-dimensional adjustment mechanism, the CCD visual detection system, the intelligent mechanical arm, the display, and the circuit signal of the stacking device.

[0022] The present invention is further configured such that: the robotic arm grasps the workpiece by means of a suction cup, and the intelligent robotic arm places the workpiece on the workbench in sequence by means of a lateral horizontal insertion.

[0023] The present invention is further configured such that: the preliminary positioning mechanism comprises four pressing plates, and the downward pressure of the pressing plates is controlled by telescopic cylinders respectively on the pressing plates to simultaneously achieve pressing and positioning of the four corner end regions of the workpiece.

[0024] The present invention is further configured as follows: the central press platform is cross-shaped, and four pressing plates are evenly distributed at four notched corners of the cross-shaped central press platform, and the spacing between the pressing plates and the central press platform is 2-4 cm.

[0025] The present invention is further configured as follows: the workbench is provided with a limit rod acting on the end plate

[0026] The present invention further discloses a battery stack assembly method, which includes placing an end plate on a workbench and positioning it, and synchronously determining the specification size of the workpiece and the size of all the workpieces after being stacked; adjusting the position of the stacking detection indicating device according to the above-mentioned size information so that the contact detection unit of the stacking detection indicating device covers the end faces to be measured after all the workpieces are stacked; starting the contact detection unit, and performing real-time stacking workpiece end face flatness detection on the end faces to be measured during the stacking of each workpiece; triggering all the contact detection units of the end faces to be measured of each workpiece to determine whether the end faces to be measured of the workpieces are skewed; if it is determined that deflection has occurred, stopping stacking and adjusting the workpiece manually or automatically, that is, adjusting it to a state where all the contact detection units of the end faces to be measured of the workpiece are triggered; and then continuing to stack other workpieces until all the workpieces are stacked, performing compaction processing, and after compaction, placing another end plate on top of the stacked group of workpieces, and then tightening them with bolts to complete the assembly.

[0027] In summary, the present invention has the following beneficial effects:

[0028] 1. The present invention utilizes a small-diameter positioning contact to achieve completely accurate positioning of one side of the workpiece, and then utilizes PV light panel imaging combined with CCD imaging to capture the displacement state of one side of the workpiece. Under the action of the small-diameter positioning contact, any slight displacement of the side of the workpiece can be observed, thereby knowing whether the workpiece as a whole is skewed. The present invention only needs to capture the state of one side of the workpiece, that is, it can realize overall monitoring of the skew phenomenon during the stacking process of the workpiece. The monitoring method is simple and effective, thereby ensuring the position error and overall shape and position error between the components of the stack during the assembly process; and the drilling process of workpieces such as membrane electrodes, bipolar plates, and sealing gaskets as well as the screw positioning and removal processes can be omitted, effectively saving manufacturing costs and improving manufacturing efficiency.

[0029] 2. The monitoring box of the present invention is provided with a scale coordinate axis, and combined with the existence of a small-diameter positioning contact, a coordinate imprint is accurately formed on the monitoring box. After determining the size of the side of the workpiece to be detected, the contact point corresponding to the workpiece on the monitoring box can be clearly identified. Therefore, when the workpiece is skewed, the corresponding undeveloped "contact point" can be accurately captured through CCD imaging, and then the coordinate axis of the "contact point" can be obtained through the program control of the PLC system and displayed on the display, so that the staff can quickly know the skew change of a certain layer of the workpiece, and effectively ensure the position error between the components and the overall shape and position error of the battery stack during the assembly process;

[0030] 3. For the stacked battery assembly, the present invention first performs a synchronous small pressure limit on the four corner areas of the assembly, and then controls the withdrawal of the monitoring box from the workpiece. This process effectively avoids the possibility that the positioning contacts may cause slight displacement of the workpiece during the withdrawal of the monitoring box. In addition, during the compaction of the battery stack assembly, the four angle areas are always in a compacted state, which is beneficial for the central pressing platform to touch the central part of the battery stack assembly without causing skewness. After that, the central pressing platform and the four pressing plates compact the battery stack assembly at the same time. That is, for a large area of ​​the battery stack assembly, the pressure is dispersed to the center + four corner areas. When the pressures from the five directions are equal, the stress concentration in multiple areas of the battery stack assembly is effectively improved, and the deformation of the battery stack assembly under pressure is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 It is a schematic diagram of the overall structure of the battery stack assembly equipment;

[0033] Figure 2 Schematic diagram of the overall structure of the battery stack assembly equipment from another angle;

[0034] Figure 3 It is a schematic diagram of the overall external structure of the monitoring box in the battery stack assembly equipment;

[0035] Figure 4 It is a schematic diagram of the partial internal structure of the monitoring box in the battery stack assembly equipment;

[0036] Figure 5 This is a schematic diagram of the installation position of the lighting device in the monitoring box of the battery stack assembly equipment;

[0037] Figure 6 It is a schematic diagram of the positions of four pressing plates and a central pressing platform in the stack pressing device of the battery stack assembly equipment;

[0038] Figure 7 This is a schematic diagram of the front of the monitoring box in the battery stack assembly equipment;

[0039] Figure 8 It is a schematic diagram of the back of the monitoring box in the battery stack assembly equipment, and is also a diagram of the development state when the workpiece is skewed;

[0040] Fig. 9 It is a component relationship diagram of the battery stack in the background technology of the specification.

[0041] In the figure: 1. base; 2. workbench; 3. stacking detection indicating device; 3-1. monitoring box; 3-1-1. positioning contact; 3-1-2. elastic reset element; 3-1-3. developing head; 3-1-4. lighting device; 3-2. three-dimensional adjustment mechanism; 4. CCD visual inspection system; 5. intelligent robotic arm; 6. stacking device; 6-1. preliminary positioning mechanism; 6-1-1. pressing plate; 6-1-2. telescopic cylinder; 6-2. center pressing table; 7. display; 8. workpiece; 9. limit rod. DETAILED DESCRIPTION

[0042] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0045] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0046] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0049] Embodiment: A stack assembly device, such as Figure 1 As shown in or 2, it includes a base 1, a stacking detection indicating device 3, an intelligent mechanical arm 5, a stacking device 6, a display 7 and a PLC system, etc. The intelligent mechanical arm 5, the stacking device 6 and the display 7 are all connected to the PLC system circuit signal to facilitate the PLC system to process data and intelligently control the intelligent mechanical arm 5, the stacking device 6, the display 7 and other modules, a workbench 2 is provided on the base 1, and a stacking detection indicating device 3 acting on the workpiece 8 is provided near the workbench 2 on the base 1;

[0050] The stacking detection indicating device 3 is configured with a plurality of contact detection units distributed in an array, each of which includes a positioning contact 3-1-1, and the detection points of all the positioning contacts 3-1-1 are in the same plane; the positioning contact 3-1-1 is connected to an elastic reset element 3-1-2, and the reset elastic force provided by the elastic reset element 3-1-2 is smaller than the friction force between adjacent single pieces in the stacked workpiece 8, so that when the positioning contact 3-1-1 is reset after being triggered to move, its reset force is not enough to cause the single-piece workpiece 8 to move; each contact detection unit is also connected to a signal trigger and indication module, and once the positioning contact 3-1-1 is triggered by a single sheet and displaced, the signal trigger and indication module will generate a specific trigger signal corresponding to the detection unit, and indicate the position of the workpiece 8 corresponding to the triggered detection unit; and the stacking detection indicating device is fixed on a three-dimensional adjustment mechanism 3-2, and the three-dimensional adjustment mechanism can drive the stacking detection indicating device to move in three directions of X, Y, and Z.

[0051] The stacking detection indicating device 3 also includes a monitoring box 3-1, which is fixed to a three-dimensional adjustment mechanism 3-2. The three-dimensional adjustment mechanism 3-2 is assembled using common components such as a slide rail assembly, a motor, and a cylinder to drive the monitoring assembly to perform displacement movements in the three directions of X, Y, and Z near the workbench 2. The three-dimensional adjustment mechanism 3-2 is connected to the PLC system circuit, that is, the displacement of the monitoring assembly in the three directions of X, Y, and Z can be controlled by the PLC system.

[0052] like Figure 1-3 As shown, the monitoring box 3-1 is rectangular and is vertically arranged on the workbench 2. The length and width of the monitoring box 3-1 are customized according to actual needs, but in theory should not be less than the length / width of each workpiece 8 in the commonly used battery stack assembly in the prior art, as well as the overall height of the battery stack; the monitoring box 3-1 is made of a PC light guide plate, with the side of the monitoring box 3-1 facing the workbench 2 being set as the front side, and the side opposite to the front side being set as the back side. More specifically, the front and back sides of the monitoring box 3-1 are both made of a PC light guide plate, and the rest is made of a plastic frame; Figure 3As shown, further, along the length and width direction of the monitoring box 3-1, a plurality of positioning contacts 3-1-1 for resisting the workpiece 8 are evenly arranged in an array on the monitoring box 3-1. The positioning contacts 3-1-1 are cylindrical and made of non-metallic materials such as PP plastic. The diameter is 1-2 mm. In this embodiment, a positioning contact 3-1-1 with a diameter of 1.5 mm is used. The spacing between each two positioning contacts 3-1-1 is 0.5-1 mm, and in this embodiment, it is specifically 0.75 mm. The positioning contacts 3-1-1 can be extended in the monitoring box 3-1 to move closer to and away from the workpiece. The positioning contact 3-1-1 performs a linear sliding motion in the direction of the work table 2, and during the sliding process, one end of the positioning contact 3-1-1 can penetrate the front side of the monitoring box 3-1, and the linear displacement of the positioning contact 3-1-1 in the monitoring box 3-1 is 1.5-4cm, and in this embodiment, it is specifically 3mm; an elastic reset element (micro spring) 3-1-2 is also provided in the positioning contact 3-1-1 to realize the reset of the positioning contact 3-1-1 during the linear displacement process, and the elastic force of the elastic reset element (micro spring) 3-1-2 is 0.05-0.2N, and in this embodiment, it is specifically 0.1N, such as Figure 4 shown.

[0053] Furthermore, the positioning contact 3-1-1 is located in the monitoring box 3-1 and is provided with a developing head 3-1-3 at one end away from the workpiece 8. The developing head 3-1-3 is a black pigment coating applied to the smaller diameter end of the positioning contact 3-1-1. The developing head 3-1-3 can contact the back of the monitoring box 3-1. The monitoring box 3-1 is also provided with a lighting device 3-1-4, such as an LED lamp, which acts on the back of the monitoring box 3-1. Figure 4 and 5 In addition, in order to better realize the monitoring of the monitoring box 3-1, the front and back of the monitoring box 3-1 are provided with corresponding scale coordinate axes along the arrangement direction of the positioning contacts 3-1-1, such as Figure 6 Or 7. The battery stack assembly equipment also includes a CCD visual inspection system 4 near the back of the monitoring box 3-1 and connected to the PLC system circuit signal. The CCG camera in the CCD visual inspection system 4 takes pictures of the back of the monitoring box 3-1 at a frequency of 10s / time, and feeds the photo data back to the PLC system. Through the program data processing of the PLC system, the corresponding coordinate information is obtained and then displayed on the display screen, so that the staff can quickly read the displacement status of each layer of the workpiece 8.

[0054] like Figure 1 and 2As shown, the intelligent robot arm 5 in the battery stack assembly equipment is arranged on a side close to the workbench 2 to grasp the workpiece 8 and place it on the workbench 2. The robot arm grasps the workpiece 8 by suction through the suction cup mechanism thereon, and the intelligent robot arm 5 places the workpiece 8 on the workbench 2 in sequence by horizontal insertion, rather than vertically inserting it into the workbench 2, so as to avoid unnecessary interference between the workpiece 8 and the positioning contact 3-1-1 on the monitoring box 3-1.

[0055] like Figure 1 As shown in or 2, the stacking device 6 in the battery stack assembly equipment includes a preliminary positioning mechanism 6-1 for the battery stack components after stacking, a central pressing platform 6-2 for compacting the battery stack components, and an electronic pressure gauge connected to the PLC system circuit signal, etc., which can monitor and control the pressure of the central pressing platform 6-2 and the preliminary positioning mechanism 6-1; the preliminary positioning mechanism 6-1 includes four pressing plates 6-1-1, and the downward pressure of the pressing plate 6-1-1 is controlled by a telescopic cylinder 6-1-2 on the pressing plate 6-1-1, so as to simultaneously realize the pressing and positioning of the four corner end areas of the workpiece 8; the central pressing platform 6-2 is cross-shaped, and the four pressing plates 6-1-1 are evenly distributed at the four missing corners of the cross-shaped central pressing platform 6-2, and the spacing between the pressing plate 6-1-1 and the central pressing platform 6-2 is 2-4cm, and in this embodiment, it is specifically 3cm, such as Figure 1 , 2 and 6.

[0056] In addition, if Figure 2 As shown, a limiting rod 9 acting on the end plate is also provided on the workbench 2 of the stack assembly equipment, so as to facilitate the limiting of the end plate when it is placed on the workbench, so that it is placed horizontally and positively on the workbench 2.

[0057] A battery stack assembly method, using the above-mentioned battery stack assembly equipment, placing an end plate on a workbench 2 and positioning it, synchronously determining the specification size of a workpiece 8 and the size of all the workpieces 8 after being stacked, adjusting the position of a stacking detection indicating device 3 according to the above-mentioned size information so that the contact detection unit of the stacking detection indicating device 3 covers the end faces to be measured after all the workpieces 8 are stacked, starting the contact detection unit, performing real-time stacking workpiece end face flatness detection on the end face to be measured during the stacking process of each workpiece 8, triggering all the contact detection units of the end face to be measured corresponding to each workpiece 8 to judge whether the end face to be measured of the workpiece 8 is skewed; if it is determined that deflection occurs, stop stacking and adjust the workpiece 8 manually or automatically, that is, adjust it to a state where all the contact detection units of the end face to be measured of the workpiece 8 are in a triggered state, and then continue to stack other workpieces 8 until all the workpieces 8 are stacked, perform compaction, and after compaction, place another end plate on top of the stacked group of several workpieces 8, and then tighten with bolts to complete the assembly.

[0058] Specific implementation steps:

[0059] S1. Place the end plate on the workbench 2, and make one side of it contact with the limit rod 9. The end plate is placed horizontally on the workbench 2. Figure 2 As shown;

[0060] S2, determine the size of the workpiece 8, and record and display it on the display 7 through the PLC system to determine the width of the workpiece 8 and the relationship between the number of positioning contacts within the corresponding coordinate scale range on the monitoring box;

[0061] S3, the three-dimensional adjustment mechanism 3-2 controls the monitor assembly to be close to the workbench 2, and the positioning contacts 3-1-1 in the bottom row of the monitoring box 3-1 are all located 1mm above the end plate;

[0062] S4, the intelligent robot arm 5 grabs the workpieces 8 one by one and places them horizontally on the workbench 2 one by one;

[0063] S5, when the workpiece 8 is placed horizontally on the workbench 2, it contacts the positioning contact 3-1-1 on the monitoring box 3-1, so that one end of the positioning contact 3-1-1 with the developing head 3-1-3 contacts the inner back of the monitoring box 3-1, and at the same time, the LED light of the lighting device 3-1-4 is turned on, and the positioning contact 3-1-1 contacted by the workpiece 8 is displaced in the monitoring box 3-1, and one end of the developing head 3-1-3 contacts the inner back of the monitoring box 3-1, thereby showing a black shadow on the back of the monitoring box 3-1;

[0064] S6, the CCD visual inspection system 4 takes a picture of the back of the monitoring box 3-1 at a frequency of 10s / time, transmits the data to the PLC system, and displays it on the display screen;

[0065] S7, when a workpiece 8 is skewed, the number of positioning contacts 3-1-1 corresponding to one side thereof is not displayed completely. The CCD visual inspection system 4 detects this phenomenon and transmits it to the PLC system. The PLC system obtains the coordinate axis of the developing head 3-1-3 that is not displayed on the monitoring box 3-1 according to the transmitted image, and finally displays the coordinate information of the developing head 3-1-3 on the display 7. After learning this, the staff quickly finds the workpiece 8 and makes manual adjustments, such as Figure 8 As shown, it represents (Y15 layer, X1-8 has development missing), that is, the workpiece 8 of the 15th layer is skewed;

[0066] S8. After stacking is completed, the preliminary positioning mechanism 6-1 of the stack pressing device 6 moves to the top of the stack assembly, and simultaneously applies a pressure of 10N to the stack assembly near the four corners;

[0067] S9. Under the action of S8, the monitoring box 3-1 is driven by the three-dimensional adjustment mechanism 3-2 to move away from the battery stack workpiece 8 in the Y-axis direction;

[0068] S10, the pressing platform of the stack pressing device 6 compacts the battery stack assembly that has completed S9. During this process, the four pressing plates 6-1-1 of the preliminary positioning mechanism 6-1 simultaneously compact the four corner end areas of the battery stack assembly with the central pressing platform 6-2 at the same time and with the same pressure;

[0069] S11. Finally, place the other end plate on the top of the battery stack assembly and tighten it with bolts to complete the battery stack assembly.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stack detection indicating device, characterized in that: A plurality of contact detection units distributed in an array are provided, each of which comprises a positioning contact (3-1-1), and the detection points of all positioning contacts (3-1-1) are located in the same plane; the positioning contact (3-1-1) is connected to an elastic reset element (3-1-2), and the reset elastic force provided by the elastic reset element (3-1-2) is smaller than the friction force between adjacent single pieces in the stacked workpieces (8), so that when the positioning contact (3-1-1) is reset after being triggered to move, its reset force is insufficient to cause the single piece of workpiece (8) to move; each contact detection unit is also connected to a signal trigger and indication module, and once the positioning contact (3-1-1) is triggered by a single piece to move, the signal trigger and indication module will generate a specific trigger signal corresponding to the detection unit, and indicate the position of the workpiece (8) corresponding to the triggered detection unit; The stack detection indicating device is fixed on a three-dimensional adjustment mechanism (3-2), and the three-dimensional adjustment mechanism can drive the stack detection indicating device to move in three directions of X, Y and Z.

2. A stack detection indicating device according to claim 1, characterized in that: Also includes: A monitoring box (3-1) is fixed to the three-dimensional adjustment mechanism (3-2); the contact detection units distributed in an array on the stacking detection indicating device (3) are arranged on a side of the monitoring box (3-1) close to the workbench (2) and are distributed along the length and width direction of the monitoring box (3-1); the positioning contact (3-1-1) performs linear sliding movement in the monitoring box (3-1) in the direction of approaching and moving away from the workbench (2); The positioning contact (3-1-1) is located in the monitoring box (3-1) and is provided with a developing head (3-1-3) at one end away from the workpiece (8). The side of the monitoring box (3-1) close to the workbench (2) is the front side, and the side opposite to the front side is the back side. The developing head (3-1-3) can contact the back side of the monitoring box (3-1). The monitoring box (3-1) is provided with a lighting device (3-1-4) for acting on the back side thereof. The battery stack assembly equipment also includes a CCD visual detection system (4) located near the back of the monitoring box (3-1).

3. A stacking detection indicating device according to claim 2, characterized in that: The monitoring box (3-1) is made of a PC light guide plate; The positioning contact (3-1-1) is cylindrical and made of non-metal, and the developing head (3-1-3) is a black pigment coated on the smaller diameter end of the positioning contact (3-1-1); The lighting device (3-1-4) is an LED lamp.

4. A stack detection indicating device according to claim 2, characterized in that: The front side of the monitoring box (3-1) is provided with a scale coordinate axis along the arrangement orientation of the positioning contacts (3-1-1), and the back side of the monitoring box (3-1) is also provided with a scale coordinate axis accordingly.

5. A battery stack assembly device, characterized in that: It comprises a stacking detection indicating device as claimed in any one of claims 1 to 4, an intelligent mechanical arm (5), a stacking device (6), a display (7) and a PLC system; The intelligent mechanical arm (5) grasps the workpiece (8) and places it on the workbench (2); The stacking device (6) comprises a preliminary positioning mechanism (6-1) for the stacked battery assembly and a central pressing platform (6-2) for compacting the battery assembly. The PLC system is respectively connected to the three-dimensional adjustment mechanism (3-2), the CCD visual detection system (4), the intelligent mechanical arm (5), the display (7), and the stacking device (6) through circuit signals.

6. The battery stack assembly equipment according to claim 5, characterized in that: The mechanical arm grasps the workpiece (8) by means of a suction cup, and the intelligent mechanical arm (5) sequentially places the workpiece (8) on the workbench (2) by means of a horizontal insertion.

7. The battery stack assembly device according to claim 5, characterized in that: The preliminary positioning mechanism (6-1) comprises four pressing plates (6-1-1), and the downward pressure of the pressing plates (6-1-1) is controlled by telescopic cylinders (6-1-2) on the pressing plates (6-1-1) respectively, so as to simultaneously achieve pressing and positioning of the four corner end regions of the workpiece (8).

8. The battery stack assembly device according to claim 5, characterized in that: The central pressing platform (6-2) is in a cross shape, and four pressing plates (6-1-1) are evenly distributed at four missing corners of the cross-shaped central pressing platform (6-2). The spacing between the pressing plates (6-1-1) and the central pressing platform (6-2) is 2-4 cm.

9. The battery stack assembly device according to claim 1, characterized in that: The workbench (2) is provided with a limiting rod (9) acting on the end plate.

10. A method for assembling a battery stack using the battery stack assembly device according to any one of claims 5 to 9, characterized in that: The end plate is placed on the workbench (2) and positioned, and the specification size of the workpiece (8) and the size of all the workpieces (8) after being stacked are simultaneously determined. According to the above-mentioned size information, the position of the stacking detection indicating device is adjusted so that the contact detection unit of the stacking detection indicating device covers the end faces to be measured of all the workpieces (8) after being stacked. The contact detection unit is started, and the end face flatness of the stacked workpieces is detected in real time during the stacking process of each workpiece (8). All contact detection units of the end face to be measured corresponding to each workpiece (8) are triggered to determine whether the end face to be measured of the workpiece (8) is skewed. If it is determined that the deflection occurs, the stacking is stopped and the workpiece (8) is adjusted manually or automatically, that is, adjusted until all the contact detection units of the end face to be measured of the workpiece (8) are in a triggered state, and then other workpieces (8) are stacked until all the workpieces (8) are stacked and compacted. After compaction, another end plate is placed on top of the stacked group of several workpieces (8), and then tightened by bolts to complete the assembly.

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