Assembly device and assembly method for copper cover

Abstract

This invention relates to an assembly apparatus and method for a copper cover. The assembly apparatus includes: a copper cover providing component, including a conveyor table for providing copper covers; a copper cover acquiring component, including a guide rail and a pick-and-place mechanism that slides with the guide rail, one end of the guide rail being located above the copper cover providing component, the pick-and-place mechanism being movable along the guide rail to above the copper cover providing component and acquiring two copper covers; and a positioning fixture located below the other end of the guide rail for placing a battery cover, the pick-and-place mechanism being movable along the guide rail to above the positioning fixture and being movable downward to place the acquired two copper covers in two mounting holes of the battery cover.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery production, in particular to a copper cover assembling device and method. BACKGROUND

[0002] Lithium ion batteries have become the first choice for portable electronic products, electric vehicles and energy storage due to their high capacity density, large specific energy and long cycle life, and have been increasingly widely used. A lithium ion battery mainly includes the following parts: an electric core obtained by winding a positive sheet, a separator film and a negative sheet in turn, an outer shell sleeved on the outside of the electric core, a battery cover plate located at the top of the outer shell, and a first pole, a second pole and a liquid injection hole for injecting electrolyte arranged on the mounting hole of the battery cover plate. After installing the pole, a copper cover needs to be coaxially arranged with the mounting hole to protect the pole. At present, the copper cover is manually assembled after the pole is installed, and the copper cover installed is prone to relative deviation in the horizontal direction from the mounting hole, resulting in poor assembly precision and slow assembly speed. SUMMARY

[0003] Therefore, it is necessary to provide a copper cover assembling device and method to solve the above problems.

[0004] A copper cover assembling device, comprising:

[0005] A copper cover providing component, comprising a conveying table, for providing copper covers;

[0006] A copper cover obtaining component, comprising a guide rail and a pick-and-place mechanism in sliding cooperation with the guide rail, one end of the guide rail being arranged above the copper cover providing component, the pick-and-place mechanism being movable along the guide rail to above the copper cover providing component and obtaining two copper covers;

[0007] A positioning jig, arranged below the other end of the guide rail, for placing a battery cover plate, the pick-and-place mechanism being movable along the guide rail to above the positioning jig and downwardly movable to place the obtained two copper covers in two mounting holes of the battery cover plate. The copper cover assembling device has at least the following beneficial technical effects:

[0008] In the embodiment, the copper cover assembling device cooperates the copper cover providing component, the copper cover obtaining component and the positioning jig to realize the assembly of the copper cover and the mounting hole of the battery cover plate, and can realize automatic positioning assembly, has high assembly precision and high assembly efficiency, and can meet the requirements of batch production.

[0009] In some embodiments, the pick-and-place mechanism comprises a vertical telescopic cylinder and a horizontal telescopic cylinder.

[0010] The vertical telescopic air cylinder comprises a vertical telescopic air cylinder base and a vertical telescopic air cylinder head which can be elongated downward, and the vertical telescopic air cylinder base is in sliding fit with the guide rail;

[0011] The horizontal telescopic air cylinder comprises a horizontally arranged bidirectional air cylinder, the bidirectional air cylinder comprises a horizontal telescopic air cylinder base and two horizontally arranged horizontal telescopic air cylinder heads, the horizontal telescopic air cylinder base is connected with the vertical telescopic air cylinder head, and the length direction of the bidirectional air cylinder is consistent with the conveying direction of the conveying table; the horizontal telescopic air cylinder heads are respectively connected with negative pressure suction heads, the distance between the two negative pressure suction heads is consistent with the distance L1 between the two copper covers which are spaced apart on the conveying table, so that the two copper covers can be approached and respectively suctioned; and the distance between the two negative pressure suction heads can be adjusted to be consistent with the distance L2 between the two mounting holes when the vertical telescopic air cylinder base is slid along the guide rail to above the positioning jig, and the two copper covers are respectively placed in the corresponding mounting holes.

[0012] In some embodiments, the positioning jig comprises a positioning support, the top surface of the positioning support is respectively provided with a positioning boss for positioning the battery cover plate at both ends of the length direction, the edges of both ends of the length direction of the top surface are respectively provided with a positioning fence, and the positioning fence is correspondingly arranged around the positioning boss.

[0013] In some embodiments, the positioning support has two or more and is arranged in sequence along the width direction.

[0014] The taking and placing mechanism has two or more and is arranged in sequence along the width direction of the positioning support, and the distance between adjacent taking and placing mechanisms is consistent with the distance between the mounting holes of the battery cover plates on the corresponding two positioning supports along the width direction of the positioning support.

[0015] In some embodiments, the positioning boss is square and protrudes 2-5 mm from the top surface.

[0016] In some embodiments, the copper cover providing part further comprises a vibrating screening mechanism connected with the input end of the conveying table, and the vibrating screening mechanism is used for screening and sequentially conveying copper covers to the copper cover acquisition station through the conveying table.

[0017] The conveying table is provided with a photoelectric sensor at the part corresponding to the two acquired copper covers, the photoelectric sensor is connected with the central control system, and is used for detecting whether there is a copper cover at the part and feeding back to the central control system, and the central control system controls the vibrating screening mechanism to start and convey copper covers based on the detection result.

[0018] In some embodiments, the surface of the conveying table is provided with a cover plate between the copper cover acquisition stations.

[0019] A method for assembling a copper cover includes the following steps:

[0020] Place the battery cover on the positioning fixture;

[0021] The pick-and-place mechanism is moved along the guide rail to above the copper cover supply component and picks up two copper covers;

[0022] The operation pick-and-place mechanism moves along the guide rail to above the positioning fixture, and then moves downward to place the two copper covers obtained therein into the two mounting holes of the battery cover, thereby realizing the acquisition of the copper covers and their assembly with the battery cover. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of an assembly device for a copper cover according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A magnified view of a section at point B in the middle;

[0025] Figure 3 for Figure 1 Schematic diagram of the positioning fixture in the middle;

[0026] In the diagram, 3100 is the copper cover component; 3110 is the vibrating screening mechanism; 3120 is the conveyor table; 3121 is the cover plate; and 3130 is the photoelectric sensor.

[0027] 3200, Copper Shield Acquisition Components;

[0028] 3210 Guide rail; 3220 Picking and placing mechanism; 3221 Vertical telescopic cylinder; 3221a Vertical telescopic cylinder seat; 3221b Vertical telescopic cylinder head; 3222 Horizontal telescopic cylinder; 3222a Horizontal telescopic cylinder seat; 3222b Horizontal telescopic cylinder head; 3222c Negative pressure adsorption head;

[0029] 1000. Positioning fixture; 1100. Positioning support; 1101. Positioning boss; 1102. Positioning enclosure;

[0030] 10. Battery cover; 101. Mounting holes. Detailed Implementation

[0031] The invention will now be further described with reference to the accompanying drawings.

[0032] To facilitate understanding of the present invention, various embodiments as defined by the claims will be described more fully below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings, which include various specific details to aid this understanding, but these details should be considered merely exemplary. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Accordingly, those skilled in the art will recognize that variations and modifications can be made to the various embodiments described herein without departing from the scope of the invention as defined by the appended claims. Furthermore, descriptions of well-known functions and constructions may be omitted for clarity and brevity.

[0033] It will be apparent to those skilled in the art that the following description of various embodiments of the invention is provided for illustrative purposes only and is not intended to limit the invention as defined by the appended claims.

[0034] Throughout the specification and claims of this application, the words “comprising” and “including,” as well as variations thereof, such as “comprising of” and “including,” mean “including but not limited to,” and are not intended to exclude other components, elements, or steps. Features, elements, or characteristics described in connection with a particular aspect, embodiment, or example of the invention are to be understood as applicable to any other aspect, embodiment, or example described herein, unless incompatible therewith.

[0035] It should be understood that the singular forms “a,” “an,” and “the” include plural references unless the context explicitly specifies otherwise. The expressions “comprising” and / or “may comprise” as used in this invention are intended to indicate the presence of a corresponding function, operation, or element, and are not intended to limit the presence of one or more functions, operations, and / or elements. Furthermore, in this invention, the terms “comprising” and / or “having” are intended to indicate the presence of the features, quantities, operations, elements, and components disclosed in the applications, or combinations thereof. Therefore, the terms “comprising” and / or “having” should be understood as implying the additional possibility of one or more other features, quantities, operations, elements, and components, or combinations thereof.

[0036] In this invention, the expression "or" includes any or all combinations of the words listed together. For example, "A or B" can include either A or B, or it can include both A and B.

[0037] It should be understood that when an element is said to be "fixed to" another element, it can be directly on the other element or there may be an intervening element; when an element is said to be "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or there may be an intervening element at the same time.

[0038] The terms "up," "down," "left," and "right" mentioned in the text are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms (such as those defined in common dictionaries) should be interpreted as having the meaning consistent with the relevant field and the context of this specification, and should not be interpreted in an idealized or overly formal sense unless expressly defined herein. The term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0040] like Figure 1 As shown, in one embodiment of the present invention, an assembly device for a copper cover is provided, comprising:

[0041] The copper cover provides component 3100, including conveyor 3120 for providing the copper cover;

[0042] The copper cover acquisition component 3200 includes a guide rail 3210 and a pick-and-place mechanism 3220 that slides with the guide rail 3210. One end of the guide rail 3210 is located above the copper cover supply component 3100. The pick-and-place mechanism 3220 can move along the guide rail 3210 to above the copper cover supply component 3100 and acquire two copper covers.

[0043] A positioning fixture 1000 is located below the other end of the guide rail 3210 and is used to place the battery cover plate 10. The picking and placing mechanism 3220 can move along the guide rail 3210 to the top of the positioning fixture 1000 and can move downward to place the two copper covers obtained into the two mounting holes 101 of the battery cover plate 10.

[0044] Specifically, the battery cover 10 is placed on the positioning fixture 1000, and the pick-and-place mechanism 3220 is moved along the guide rail 3210 to above the copper cover providing component 3100 and obtains two copper covers; then it is moved along the guide rail 3210 to above the positioning fixture 1000 and moved downward to place the two obtained copper covers into the two mounting holes 101 of the battery cover 10 respectively, thereby realizing the acquisition of copper covers and quick assembly with the battery cover 10.

[0045] In this embodiment, the copper cover and the mounting hole 101 of the battery cover 10 are assembled by the cooperation of the copper cover providing component 3100, the copper cover acquiring component 3200 and the positioning fixture 1000. This enables automatic positioning assembly with high assembly accuracy and efficiency, and can meet the requirements of mass production.

[0046] refer to Figure 1 and Figure 2 In some embodiments, the picking and placing mechanism 3220 includes a vertical telescopic cylinder 3221 and a horizontal telescopic cylinder 3222;

[0047] The vertical telescopic cylinder 3221 includes a vertical telescopic cylinder seat 3221a and a vertical telescopic cylinder head 3221b that can extend downwards. The vertical telescopic cylinder seat 3221a is slidably engaged with the guide rail 3210.

[0048] The horizontal telescopic cylinder 3222 includes a horizontally arranged bidirectional cylinder. The bidirectional cylinder includes a horizontal telescopic cylinder seat 3222a and two horizontal telescopic cylinder heads 3222b arranged opposite to each other. The horizontal telescopic cylinder seat 3222a is connected to the vertical telescopic cylinder head 3221b, and the length direction of the bidirectional cylinder is consistent with the conveying direction of the conveying table 3120. The horizontal telescopic cylinder heads 3222b are respectively connected to negative pressure adsorption heads 3222c. There is a preset distance between the two negative pressure adsorption heads 3222c, which is consistent with the distance L1 between the two copper covers on the conveying table 3120. They are used to approach and adsorb the two copper covers respectively. The distance between the two negative pressure adsorption heads 3222c can be adjusted to be consistent with the distance L2 between the two mounting holes 101 when the vertical telescopic cylinder seat 3221a slides along the guide rail 3210 above the positioning fixture 1000, and the two copper covers are respectively placed in the corresponding mounting holes 101.

[0049] Specifically, the battery cover 10, after being fitted with the positive and negative terminals in the two mounting holes 101 respectively, is placed in the positioning fixture 1000; the pick-and-place mechanism 3220 is moved along the guide rail 3210 to above the conveyor table 3120, and the distance between the two negative pressure adsorption heads 3222c is adjusted to match the distance L1 between the two copper covers on the conveyor table 3120 by driving the horizontal telescopic cylinder head 3222b; the vertical telescopic cylinder head 3221b is driven to extend downward, causing the horizontal telescopic cylinder seat 3222a to move downward, and the two negative pressure adsorption heads 3222c simultaneously move downward and adsorb the corresponding copper covers respectively; then the vertical telescopic cylinder head 3221b is driven to drive the horizontal telescopic cylinder 3222a and the two negative pressure adsorption heads 3222c to extend downward and move downward, causing the two negative pressure adsorption heads 3222c to move downward and adsorb the corresponding copper covers respectively; then the vertical telescopic cylinder head 3221b is driven to drive the horizontal telescopic cylinder 3222a and the two negative pressure adsorption heads 3222a to extend downward and move downward, causing the two negative pressure adsorption heads 3222c to move downward and adsorb the corresponding copper covers respectively; The pressure adsorption head 3222c rises, and the pick-and-place mechanism 3220 moves along the guide rail 3210 to above the battery cover plate 10. The distance between the two negative pressure adsorption heads 3222c is adjusted to match the distance L2 between the two mounting holes 101 by driving the horizontal telescopic cylinder head 3222b, and they are respectively aligned with the positions of the mounting holes 101. The vertical telescopic cylinder head 3221b is driven to extend downward, causing the horizontal telescopic cylinder seat 3222a to move downward. The two negative pressure adsorption heads 3222c move downward simultaneously and place the copper cover in the corresponding mounting hole 101. The negative pressure of the two negative pressure adsorption heads 3222c is released, and finally the copper cover is coaxially placed in the mounting hole 101 of the battery cover plate 10, realizing the assembly of the copper cover.

[0050] Since the copper covers on the conveyor 3120 are arranged in sequence, the distance between any two copper covers is different from the distance L2 between the two mounting holes 101 on the battery cover 10. Therefore, usually only the copper covers can be aligned with the mounting holes 101 one by one for assembly, and it is difficult to install two copper covers accurately at the same time.

[0051] In this embodiment, two copper covers are first simultaneously acquired through the cooperation of a vertical telescopic cylinder 3221 and a bidirectional cylinder. Then, the length of the bidirectional cylinder is adjusted, and the positions and movements of the vertical telescopic cylinder 3221, the bidirectional cylinder, and the battery cover 10 are coordinated to simultaneously transfer the two copper covers to the two mounting holes 101. This one-step operation achieves rapid assembly of the two copper covers, saving half the time. The operation is simple and has significant implications for improving production efficiency. This embodiment also ensures the precise installation position of the copper covers, avoiding horizontal deviations caused by incomplete vertical alignment between the two copper covers and the two mounting holes 101. The copper covers and their corresponding mounting holes 101 maintain coaxial assembly. The negative pressure adsorption head 3222c provides stable adsorption force for the copper covers, preventing positional shifts during transfer that could lead to assembly deviations. By adopting the above structure, the complexity of the assembly process is reduced, the difficulty of the operation is lowered, and the probability of errors is reduced.

[0052] In this embodiment, the negative pressure adsorption head 3222c generates negative pressure by being connected to the negative pressure generator through an air pipe. Specifically, when the negative pressure adsorption head 3222c approaches the conveyor table 3120, the negative pressure generator is activated, and the copper cover can be adsorbed through the negative pressure adsorption head 3222c. The negative pressure adsorption head 3222c moves downward and places the copper cover in the corresponding mounting hole 101. After the negative pressure generator is turned off, the two negative pressure adsorption heads 3222c release the negative pressure and loosen the copper cover, so that the copper cover is coaxially placed in the mounting hole 101 of the battery cover plate 10, thus realizing the assembly of the copper cover.

[0053] refer to Figure 3 In some embodiments, the positioning fixture 1000 includes a positioning support 1100. The top surface of the positioning support 1100 has positioning bosses 1101 at both ends along its length for positioning the battery cover 10. Positioning blocking portions 1102 are provided at both ends of the top surface along its length, and these blocking portions 1102 are arranged around the positioning bosses 1101. Specifically, the battery cover 10 to be assembled is placed on the positioning support 1100, and both ends of the battery cover 10 along its length are positioned by the positioning bosses 1101.

[0054] This embodiment not only enables precise assembly of the copper cover; the positioning fixture 1000 provides a positioning space for the battery cover 10. After the battery cover 10 is placed on its surface, the positioning boss 1101 can cooperate to position and support the electrode mounting parts on both sides of the length direction of the battery cover 10. After the battery cover 10 is positioned, the structure is stable and will not bend or deform when it is moved or assembled on the production line. It can meet the requirements for the flatness of the battery cover 10 when installing the positive terminal post, negative terminal post, or welding the explosion-proof sheet, thus improving the assembly yield.

[0055] The positioning enclosure 1102 is arranged around the circumference of the battery cover 10 to limit the battery cover 10. It works together with the positioning boss 1101 to prevent the battery cover 10 from sliding on the surface of the positioning support 1100 when the positioning fixture 1000 moves on the production line, which would prevent the terminal post and other parts from being assembled in the preset manner, or cause the product to be scrapped due to the deviation of the assembly position.

[0056] refer to Figure 3 In some embodiments, there are two or more positioning supports 1100, arranged sequentially along the width direction;

[0057] There are two or more pick-up and place-down mechanisms 3220, which are arranged sequentially along the width direction of the positioning support 1100, and the distance between adjacent pick-up and place-down mechanisms 3220 is the same as the distance between the mounting holes 101 of the battery cover plate 10 on the corresponding two positioning supports 1100 along the width direction of the positioning support 1100.

[0058] Specifically, taking two as an example, the two pick-and-place mechanisms 3220 simultaneously move along the guide rail 3210 to above the copper cover providing component 3100 and sequentially pick up the copper covers; then they move along the guide rail 3210 to above the positioning fixture 1000 and move downwards to place the picked-up copper covers into the mounting holes 101 of the battery cover 10 on the two positioning supports 1100 respectively, thereby realizing the picking up of the copper covers and their rapid assembly with the two battery cover 10s.

[0059] In this embodiment, multiple pick-and-place mechanisms 3220 and positioning supports 1100 are arranged simultaneously to realize the assembly of copper covers on multiple battery cover plates 10; the positioning fixture 1000 provides positioning space for multiple battery cover plates 10. After multiple battery cover plates 10 are positioned, the structure is stable and will not bend or deform when they move or are assembled on the production line at the same time. This can meet the requirements for the flatness of the battery cover plate 10 when installing positive terminal posts, negative terminal posts, copper covers, or welding explosion-proof sheets, thereby improving the yield and work efficiency of the assembly.

[0060] refer to Figure 3 In some embodiments, the positioning enclosure 1102 includes three positioning enclosure blocks, which are respectively located at the end in the length direction and on both sides in the width direction. In this embodiment, a total of six positioning enclosure blocks are arranged around the circumference of the battery cover 10 to enclose and limit the battery cover 10. This works together with the positioning boss 1101 to prevent the battery cover 10 from slipping on the surface of the positioning support 1100 when the positioning fixture 1000 moves on the production line, which would prevent the terminal posts and other components from being assembled in the preset manner, or cause product scrap due to assembly position deviation.

[0061] refer to Figure 3 In some embodiments, the positioning boss 1101 is square and protrudes 2-5mm from the top surface. Actual usage tests show that the positioning boss 1101, with this design shape and size, will not be too high, causing the center to be suspended, nor too low, causing damage to the surface of the battery cover 10 where it contacts the positioning support 1100. This ensures stable positioning and support for the electrode mounting portions on both sides of the battery cover 10 along its length. Once positioned, the battery cover 10 is structurally stable and will not bend or deform. This meets the flatness requirements of the battery cover 10 when installing positive and negative terminals, copper covers, or welding explosion-proof sheets, thus improving the assembly yield.

[0062] refer to Figure 1 In some embodiments, the copper cover providing component 3100 further includes a vibrating screening mechanism 3110 connected to the input end of the conveyor table. The vibrating screening mechanism 3110 is used to screen and sequentially convey copper covers to the copper cover acquisition station through the conveyor table.

[0063] refer to Figure 1 In some embodiments, the conveyor 3120 is equipped with photoelectric sensors 3130 at the locations corresponding to the two copper covers being acquired. The photoelectric sensors 3130 are connected to the central control system and are used to detect whether there are copper covers at their locations and feed back to the central control system. The central control system controls the vibrating screening mechanism 3110 to start and convey the copper covers based on the detection results.

[0064] Specifically, after the copper cover is acquired by the pick-and-place mechanism 3220, the photoelectric sensor 3130 detects that there is no copper cover at the copper cover acquisition station and sends feedback to the central control system. Based on the detection result, the central control system controls the vibrating screening mechanism 3110 to start and transport the copper cover. After the copper cover arrives at the copper cover acquisition station, the photoelectric sensor 3130 detects that there is a copper cover at the copper cover acquisition station and sends feedback to the central control system. Based on the detection result, the central control system controls the vibrating screening mechanism 3110 to stop transporting.

[0065] In this embodiment, the vibrating screening mechanism 3110 uses vibration to arrange the copper covers sequentially along the length of the conveyor table and continuously transport them one by one away from the vibrating screening mechanism 3110. This rhythmic transport allows for rhythmic coordination with the photoelectric sensor 3130, avoiding continuous transmission, failure to respond to signals in a timely manner, and pauses during the transport process. This embodiment enables continuous automatic transport without manual handling, ensuring the transport rate and preventing contamination of the copper covers by manual transport.

[0066] refer to Figure 1 In some embodiments, a cover plate 3121 is provided on the surface of the conveyor table 3120 between the copper cover acquisition stations. The cover plate 3121 is used to shield the copper cover and prevent the copper cover between the two copper cover acquisition stations from being accidentally adsorbed due to improper operation.

[0067] In the above description, although expressions such as "first" and "second" may be used to describe various elements of the invention, they are not intended to limit the corresponding elements. For example, the above expressions are not intended to limit the order or importance of corresponding elements. The above expressions are used to distinguish one component from another.

[0068] The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. Singular expressions include plural expressions unless there are significant differences in context or approach between them.

[0069] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

[0070] Those skilled in the art will understand that the technical features of the above embodiments can be omitted, added, or combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments have been described. However, as long as the combination of these technical features does not contradict each other, and simple transformations that those skilled in the art can conceive of, as well as structural transformations that adapt to and functionally modify the prior art, should be considered within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that although the present invention has been shown and described with reference to various embodiments, those skilled in the art can make various modifications and improvements in form and detail without departing from the concept of the present invention, and without departing from the scope of the invention as defined by the appended claims. All such modifications and improvements fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A copper cover assembling device, characterized in that, it comprises: a copper cover providing component comprising a conveying table for providing copper covers; a copper cover obtaining component comprising a guide rail and a pick-and-place mechanism in sliding cooperation with the guide rail, one end of the guide rail being arranged above the copper cover providing component, the pick-and-place mechanism being movable along the guide rail to above the copper cover providing component and obtaining two copper covers; a positioning jig arranged below the other end of the guide rail for placing a battery cover plate, the pick-and-place mechanism being movable along the guide rail to above the positioning jig and downwardly movable to place the obtained two copper covers on two mounting holes of the battery cover plate at the same time; the positioning jig comprising a positioning support, two end edges of the top surface of the positioning support in the length direction being respectively provided with a positioning fence; the pick-and-place mechanism comprising a vertical telescopic cylinder and a horizontal telescopic cylinder; the vertical telescopic cylinder comprising a vertical telescopic cylinder seat and a vertical telescopic cylinder head downwardly extendable, the vertical telescopic cylinder seat being in sliding cooperation with the guide rail; the horizontal telescopic cylinder comprising a horizontally arranged bidirectional cylinder, the bidirectional cylinder comprising a horizontal telescopic cylinder seat and two horizontally arranged horizontal telescopic cylinder heads, the horizontal telescopic cylinder seat being connected with the vertical telescopic cylinder head, and the length direction of the bidirectional cylinder being consistent with the conveying direction of the conveying table; the horizontal telescopic cylinder heads being respectively connected with negative pressure suction heads, the distance between the two negative pressure suction heads being consistent with the distance L1 between the two copper covers spaced apart on the conveying table, so that the two copper covers can be approached and respectively suctioned; and the distance between the two negative pressure suction heads being adjustable to be consistent with the distance L2 between the two mounting holes when the vertical telescopic cylinder seat is slid along the guide rail to above the positioning jig, and the two copper covers can be respectively placed in the corresponding mounting holes. 2.The copper cover assembling device according to claim 1, characterized in that, the top surface of the positioning support is respectively provided with positioning bosses at both ends in the length direction for positioning the battery cover plate, and the positioning fence is correspondingly arranged around the positioning bosses. 3.The copper cover assembling device according to claim 1, characterized in that, the positioning support has two or more than two and is arranged in sequence in the width direction; the pick-and-place mechanism has two or more than two and is arranged in sequence in the width direction of the positioning support, and the distance between adjacent pick-and-place mechanisms is consistent with the distance between the mounting holes of the battery cover plate on the corresponding two positioning supports in the width direction of the positioning support. 4.The copper cover assembling device according to claim 2, characterized in that, the positioning bosses are square and protrude 2-5mm from the top surface. 5.The copper cover assembling device according to claim 1, characterized in that, the copper cover providing component further comprises a vibrating screening mechanism connected with the input end of the conveying table, the vibrating screening mechanism being used for screening and sequentially conveying copper covers to the copper cover obtaining station through the conveying table. The conveying table is provided with photoelectric sensors at positions corresponding to the two obtained copper covers, the photoelectric sensors are connected with a central control system, and are used to detect whether there is a copper cover at the positions and feed back to the central control system, and the central control system controls the vibration screening mechanism to start and convey the copper covers based on the detection results.

6. The copper cover assembling device according to claim 1, wherein, A cover plate is arranged on the conveying table surface between the copper cover obtaining stations.

7. A method of assembling a copper can, characterized by, The method is suitable for the copper cover assembling device according to any one of claims 1-6; The method comprises the following steps: Placing the battery cover plate on a positioning jig; Moving a taking and placing mechanism along a guide rail to above the copper cover providing part and obtaining two copper covers; Operating the taking and placing mechanism to move along the guide rail to above the positioning jig, and moving downward to correspondingly place the two obtained copper covers in two mounting holes of the battery cover plate, so as to realize the obtaining of the copper covers and the assembling of the copper covers and the battery cover plate.

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