Feeding system for battery pole pieces

Abstract

The present invention relates to the field of battery manufacturing, and discloses a battery pole piece feeding system, which comprises a first material box assembly and a second material box assembly, each of the first material box assembly and the second material box assembly comprises two material boxes, and each material box can be used for placing stacked battery pole pieces; the taking and placing assembly is used for grabbing the battery pole pieces from the interiors of the material boxes of the first material box assembly and the second material box assembly as required and transferring and placing the battery pole pieces on the transfer assembly; and the transfer assembly is used for bearing the battery pole pieces placed by the taking and placing assembly and supplying the battery pole pieces to the next working procedure one by one. The device has two feeding modes, the first mode is to only grab a battery positive plate and a battery negative plate and place the battery positive plate and the battery negative plate on the transfer assembly, the second mode is to grab two single-sided coated battery plates with opposite coating directions at the beginning and at the end, and the middle mode is the same as the first mode; therefore, the lamination requirements of the batteries in two different lamination modes can be met, the applicability is good, and the production efficiency of a production line can be improved.

Description

Technical Field

[0001] The present invention relates to the field of battery manufacturing, and more specifically, to a feeding system for battery pole pieces. Background Art

[0002] The existing laminated lithium battery is a battery that has multiple positive and negative plates stacked together, and the positive and negative plates are separated by a diaphragm. After the lamination is completed, these stacked battery plates need to be fixed to prevent them from spreading. There are generally two ways to fix them. One is to fix them with glue after coating them with a diaphragm. When this fixing method is used, due to the isolation protection of the diaphragm coating, the outermost battery plate can be double-sided coated. The battery plate feeding device that supplies this fixing method only needs to supply the double-sided coated battery plates to the next process in sequence. Another fixing method is to use hot pressing curing. After hot pressing, the battery stack is fixed, and there is no need to use a diaphragm to cover and fix it on the outside. Due to the lack of isolation of the diaphragm, the outermost layer needs to use a single-sided coated battery plate, and the uncoated side is facing outward when stacking. The battery pole piece feeding device that supplies in this fixed manner, in addition to providing double-sided coated battery pole pieces in sequence, also needs to provide two single-sided coated battery pole pieces for the outermost layer, and the two single-sided coated battery pole pieces are oriented in opposite directions.

[0003] However, the battery electrode feeding device in the prior art can only meet the feeding demand of a single method. When different types of batteries are produced on the production line, different feeding devices need to be used, resulting in low overall production efficiency and poor applicability. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the present invention provides a feeding device that can meet the feeding requirements of two battery electrode stacking methods, namely, lamination and hot pressing.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A feeding system for battery pole pieces, comprising:

[0007] A first material box assembly, which includes two material boxes, each of which can be used to place stacked battery pole pieces;

[0008] A second material box assembly includes two material boxes, each of which can be used to place stacked battery pole pieces;

[0009] A pick-and-place assembly, used to grab the battery pole pieces from the first and second material box assemblies as needed and transfer and place them on the transfer assembly;

[0010] The transfer assembly is used to hold the battery electrodes placed in the pick-and-place assembly and supply them to the next process piece by piece;

[0011] Furthermore, one of the material boxes in the first material box assembly is used to place the double-sided coated battery positive electrode sheet, and one of the material boxes in the second material box assembly is used to place the double-sided coated battery negative electrode sheet;

[0012] The first material box assembly and the other material box of the second material box assembly are both used to place single-sided coated battery pole pieces, and the coatings of the single-sided coated battery pole pieces on the first material box assembly and the second material box assembly are oriented in opposite directions;

[0013] When feeding, one of the following two feeding methods is performed as needed:

[0014] In the first feeding method, the pick-and-place component takes the positive electrode sheets and the negative electrode sheets of the battery from the first and second material box components one by one in turn and places them on the transfer component;

[0015] The second feeding method is that the picking and placing component first grabs a single-sided coated battery electrode sheet with the coating facing upward from the material boxes of the first material box component and the second material box component and places it on the transfer component, and then executes the first feeding method and first grabs the battery electrode sheet with the opposite polarity to the grabbed single-sided coated battery electrode sheet, and finally grabs a single-sided coated battery electrode sheet with the coating facing downward from the material boxes of the first material box component and the second material box component and places it on the transfer component.

[0016] Furthermore, the pick-and-place assembly includes a first pick-and-place mechanism and a second pick-and-place mechanism, which are respectively used to grab battery electrodes from the material boxes of the first material box assembly and the second material box assembly and transfer and place them on the transfer assembly.

[0017] Furthermore, the transfer assembly includes a first transfer table and a second transfer table, which are respectively used for the first pick-and-place mechanism and the second pick-and-place mechanism to place the battery electrodes and supply them one by one to the next process.

[0018] Furthermore, the first transfer table and the second transfer table also perform movement correction along the X-axis and the Y-axis and rotation correction around the Z-axis on each battery electrode sheet thereon, and then supply the battery electrode sheet to the next process after correction.

[0019] Furthermore, it also includes a first waste tray and a second waste tray. The first transfer table and the second transfer table also perform appearance quality inspection on each battery electrode thereon. If a battery electrode whose appearance quality does not meet the requirements is detected, the first pick-and-place mechanism and the second pick-and-place mechanism will respectively grab the battery electrode and transfer it to the first waste tray and the second waste tray.

[0020] Furthermore, the two material boxes of the first material box assembly, the first transfer table and the first waste tray are evenly arranged around the first pick-and-place mechanism and constitute a first feeding module, the two material boxes of the second material box assembly, the second transfer table and the second waste tray are evenly arranged around the second pick-and-place mechanism and constitute a second feeding module, the first feeding module and the second feeding module are symmetrically arranged on the left and right, and the first transfer table and the second transfer table are close to the axis of symmetry.

[0021] Furthermore, the two material boxes of the first material box assembly are arranged opposite to each other, the first transfer table and the first waste tray are arranged opposite to each other, the two material boxes of the second material box assembly are arranged opposite to each other, and the second transfer table and the second waste tray are arranged opposite to each other.

[0022] Furthermore, the first pick-and-place mechanism and the second pick-and-place mechanism have the same structure, both comprising a rotating arm and a suction cup member, the suction cup member being fixedly connected to the end of the rotating arm, the rotating arm being movable up and down and rotatable, so that the suction cup member of the first pick-and-place mechanism can follow the corresponding rotating arm to rotate to the top of any one of the two material boxes of the first material box assembly, the first transfer table and the first waste tray, and the suction cup member of the second pick-and-place mechanism can follow the corresponding rotating arm to rotate to the top of any one of the two material boxes of the second material box assembly, the second transfer table and the second waste tray,

[0023] Furthermore, the two material boxes of the first material box assembly can be automatically adjusted respectively so that the topmost battery electrode thereon and the plane of the first transfer table for placing the battery electrode are within a set height difference, and the two material boxes of the second material box assembly can be automatically adjusted respectively so that the topmost battery electrode thereon and the plane of the second transfer table for placing the battery electrode are within a set height difference.

[0024] Furthermore, the first pick-and-place mechanism and the second pick-and-place mechanism both include a rotary drive member and a linear drive member for pushing the rotary drive member to move up and down, and the rotating arm is fixedly connected to the rotating shaft of the rotary drive member.

[0025] To sum up, the present invention has the beneficial effects: the present invention adopts a first material box assembly and a second material box assembly, each of which includes two material boxes, so that the four material boxes can hold double-sided coated battery positive electrodes, double-sided coated battery negative electrodes, and two single-sided coated battery electrodes with opposite coating directions, and has two feeding methods. The first is to only grab the battery positive electrode sheets and the battery negative electrode sheets and place them on the transfer assembly. This method is suitable for the stacking of batteries with diaphragm coated glue fixed; the second method will grab two single-sided coated battery electrodes with opposite coating directions at the beginning and the end, and the middle is the same as the first method. This method is suitable for the stacking of batteries that only use hot pressing curing; in this way, the present invention can meet the stacking needs of batteries with two different stacking methods, has good applicability, and is conducive to improving the production efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a feeding system of the present invention;

[0027] Figure 2 It is a structural diagram of the pick-and-place mechanism.

[0028] Figure numerals: 1. first material box assembly; 2. second material box assembly; 31. first pick-and-place mechanism; 32. second pick-and-place mechanism; 41. first turntable; 42. second turntable; 51. first waste tray; 52. second waste tray; 10. rotating arm; 20. suction cup member; 30. rotating drive member; 40. linear drive member; 200. pick-and-place mechanism. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to the other component.

[0031] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] like Figure 1 and Figure 2A battery electrode feeding system shown in the figure includes a first material box assembly 1, a second material box assembly 2, a pick-and-place assembly and a transfer assembly, wherein the first material box assembly 1 and the second material box assembly 2 each include two material boxes 100, each material box 100 can be used to place stacked battery electrodes; the pick-and-place assembly is used to grab the battery electrodes from the material boxes 100 of the first material box assembly 1 and the second material box assembly 2 as needed and transfer them to the transfer assembly; the transfer assembly is used to hold the battery electrodes placed by the pick-and-place assembly and supply them one by one to the next process.

[0034] When placing the battery electrodes, one of the boxes 100 in the first box assembly 1 is used to place the double-sided coated battery positive electrode, and one of the boxes 100 in the second box assembly 2 is used to place the double-sided coated battery negative electrode; in this case, when feeding, the pick-and-place assembly takes turns grabbing the battery positive electrode and the battery negative electrode from the boxes 100 of the first box assembly 1 and the second box assembly 2 one by one and places them on the transfer assembly; when grabbing for the first time, the battery positive electrode or the battery negative electrode can be grabbed first as needed. This is the first feeding method, which is suitable for the battery stacks fixed by the diaphragm coating and adhesive.

[0035] When placing battery pole pieces, one of the material boxes 100 in the first material box assembly 1 is used to place the double-sided coated battery positive pole piece, and one of the material boxes 100 in the second material box assembly 2 is used to place the double-sided coated battery negative pole piece; another material box 100 in the first material box assembly 1 is used to place the single-sided coated battery pole piece, and another material box 100 in the second material box assembly 2 is used to place the single-sided coated battery pole piece, and the coating direction of the single-sided coated battery pole piece on the first material box assembly 1 and the second material box assembly 2 is opposite; in this case, when performing material feeding, the pick-and-place assembly first takes a single-sided coated battery pole piece with the coating facing upward from the material boxes 100 of the first material box assembly 1 and the second material box assembly 2 The top-coated battery pole piece is grabbed and placed on the transfer assembly, and then the first feeding method is executed. When executing, the double-sided coated battery pole piece with the opposite polarity to the single-sided coated battery pole piece that has been grabbed at the beginning is first grabbed, and then the positive battery pole piece and the negative battery pole piece are grabbed one by one in turn and placed on the transfer assembly, and finally, a single-sided coated battery pole piece with the coating facing downward is grabbed from the first material box assembly 1 and the second material box assembly 2. The battery pole piece is placed on the transfer assembly, so that the two outermost battery pole pieces of the battery pole piece group that are finally stacked are single-sided coated battery pole pieces, and the coatings are all facing the inside of the battery pole piece group. This is the second feeding method, which is suitable for stacking batteries that are only cured by hot pressing.

[0036] At present, the single-sided coated battery electrodes on the market are generally positive electrodes. For the second feeding method, the first material box assembly 1 and the other material box 100 of the second material box assembly 2 are all filled with single-sided coated battery positive electrodes and the coatings are in opposite directions. When executing, the single-sided coated battery positive electrode sheet with the coating facing upward is first grabbed, followed by the double-sided coated battery negative electrode sheet, and finally the single-sided coated battery positive electrode sheet with the coating facing downward is grabbed; in addition, the single-sided coated battery electrode sheet can also be a negative electrode sheet, so that the first material box assembly 1 and the other material box 100 of the second material box assembly 2 are all filled with single-sided coated battery negative electrode sheets and the coatings are in opposite directions. When executing, the single-sided coated battery negative electrode sheet with the coating facing upward is first grabbed, followed by the double-sided coated battery positive electrode sheet, and finally the single-sided coated battery negative electrode sheet with the coating facing downward is grabbed.

[0037] The above two feeding methods can be set according to actual production needs. You only need to place the corresponding battery electrodes and select the corresponding execution program. The control system will pick and place the components to complete the grabbing operation.

[0038] In one embodiment, if Figure 1 As shown, the pick-and-place assembly includes a first pick-and-place mechanism 31 and a second pick-and-place mechanism 32, and the transfer assembly includes a first transfer table 41 and a second transfer table 42. The first pick-and-place mechanism 31 is used to grab the battery pole piece from the material box 100 of the first material box assembly 1 and transfer it to the first transfer table 41, and the second pick-and-place mechanism 32 is used to grab the battery pole piece from the material box 100 of the second material box assembly 2 and transfer it to the second transfer table 42. The first transfer table 41 and the second transfer table 42 respectively supply the battery pole piece to the next process piece by piece. In this way, each material box 100 assembly has an independent pick-and-place mechanism to grab the pole piece and place it on an independent transfer table, which is conducive to improving the efficiency of grabbing.

[0039] In one embodiment, if Figure 1As shown, it also includes a first waste tray 51 and a second waste tray 52, wherein the first waste tray 51 is used to place battery pole pieces with appearance quality problems in the first material box assembly 1, and the second waste tray 52 is used to place battery pole pieces with appearance quality problems in the second material box assembly 2. The two material boxes 100 of the first material box assembly 1, the first transfer table 41 and the first waste tray 51 are evenly arranged around the first pick-and-place mechanism 31, and the two material boxes 100 of the first material box assembly 1, the first transfer table 41 and the first waste tray 51 constitute a first feeding module that can be fed separately; similarly, the two material boxes 100, the second transfer table 42 and the second waste tray 52 of the second material box assembly 2 are evenly arranged around the second pick-and-place mechanism 32 and constitute a second feeding module that can be fed separately. Moreover, the first feeding module and the second feeding module are arranged symmetrically on the left and right, and the first transfer table 41 and the second transfer table 42 are close to the axis of symmetry, that is, the two are relatively close, so that it is convenient for the pick-and-place mechanism 200 of the next process arranged in the middle to grab the battery electrodes thereon, which can improve the grabbing efficiency.

[0040] Preferably, the first transfer table 41 and the second transfer table 42 also have a position correction function and an appearance quality detection function, wherein the position correction function includes movement correction along the X-axis and Y-axis and rotation correction around the Z-axis; the appearance quality detection function detects the appearance quality of each battery electrode. If the battery electrode whose appearance quality does not meet the requirements is detected, the first pick-and-place mechanism 31 and the second pick-and-place mechanism 32 will grab the battery electrode and transfer it to the first waste tray 51 and the second waste tray 52 respectively. Each battery electrode is subjected to position correction and appearance quality inspection to ensure that there is no problem before it is supplied to the next process.

[0041] In one embodiment, the first pick-and-place mechanism 31 and the second pick-and-place mechanism 32 have the same structure, both including a rotating arm 10 and a suction cup 20, wherein the suction cup 20 is fixedly connected to the end of the rotating arm 10, and the rotating arm 10 can move up and down and can rotate. When the rotating arm 10 of the first pick-and-place mechanism 31 is in motion, the suction cup 20 of the first pick-and-place mechanism 31 can be rotated to the top of any of the two material boxes 100 of the first material box assembly 1, the first transfer table 41, and the first waste tray 51; similarly, when the rotating arm 10 of the second pick-and-place mechanism 32 is in motion, the suction cup 20 of the second pick-and-place mechanism 32 can be rotated to the top of any of the two material boxes 100 of the second material box assembly 2, the second transfer table 42, and the second waste tray 52.

[0042] In one embodiment, if Figure 1As described above, the two material boxes 100 of the first material box assembly 1 are arranged oppositely, and the first transfer table 41 and the first waste tray 51 are arranged oppositely; similarly, the two material boxes 100 of the second material box assembly 2 are arranged oppositely, and the second transfer table 42 and the second waste tray 52 are arranged oppositely. During operation, the rotating arm 10 can transfer the battery pole piece from the two material boxes 100 of the first material box assembly 1 to the first transfer table 41 every 90° rotation. The second pick-and-place mechanism 32 also has the same effect as the first pick-and-place mechanism 31 during the pick-and-place operation, shortening the angular travel of the rotating arm 10 and improving the operation efficiency.

[0043] In one embodiment, if Figure 2 As shown, the first pick-and-place mechanism 31 and the second pick-and-place mechanism 32 both further include a rotary drive member 30 and a linear drive member 40 for pushing the rotary drive member 30 to move up and down, and the rotating arm 10 is fixedly connected to the rotating shaft of the rotary drive member 30. The rotary drive member 30 can drive the rotating arm 10 to rotate the rotating arm 10 to a suitable position, and the linear drive member 40 pushes the rotary drive member 30 and the rotating arm 10 and the suction cup member 20 thereon to move up and down to achieve the approach and distance action, so that the suction cup member 20 can grab and place the battery pole piece.

[0044] In addition, the two material boxes 100 of the first material box assembly 1 can be automatically adjusted respectively so that the topmost battery electrode on them and the plane of the first transfer table 41 for placing the battery electrode are within the set height difference. Since it is necessary to adsorb the battery electrode from the two material boxes 100 of the first material box assembly 1, and when the battery electrode with appearance problems is found, it is necessary to adsorb the battery electrode from the first transfer table 41, so the topmost battery electrode of the two material boxes 100 of the first material box assembly 1 needs to be at basically the same height as the plane of the first transfer table 41 for placing the battery electrode, that is, the height difference needs to be within the range that the suction cup member 20 can adsorb normally, so that the linear drive member 40 can uniformly drive the rotating arm 10 to descend to a fixed height, so that the suction cup member 20 can complete the adsorption operation. Similarly, the two material boxes 100 of the second material box assembly 2 can be automatically adjusted respectively so that the topmost battery electrode on them and the plane of the second transfer table 42 for placing the battery electrode are within the set height difference.

[0045] The above embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A battery pole piece feeding system, characterized in that: include: A first material box assembly, which includes two material boxes, each of which can be used to place stacked battery pole pieces; The second material box assembly includes two material boxes, each of which can be used to place stacked battery pole pieces; a pick-and-place assembly is used to grab the battery pole pieces from the material boxes of the first material box assembly and the second material box assembly as needed and transfer and place them on the transfer assembly; The transfer assembly is used to hold the battery electrodes placed in the pick-and-place assembly and supply them to the next process piece by piece; Furthermore, one of the material boxes in the first material box assembly is used to place the double-sided coated battery positive electrode sheet, and one of the material boxes in the second material box assembly is used to place the double-sided coated battery negative electrode sheet; The first material box assembly and the other material box of the second material box assembly are both used to place single-sided coated battery pole pieces, and the coatings of the single-sided coated battery pole pieces on the first material box assembly and the second material box assembly are oriented in opposite directions; When feeding, one of the following two feeding methods is performed as needed: In the first feeding method, the pick-and-place component takes the positive electrode sheets and the negative electrode sheets of the battery from the first and second material box components one by one in turn and places them on the transfer component; The second feeding method is that the picking and placing component first grabs a single-sided coated battery electrode sheet with the coating facing upward from the material boxes of the first material box component and the second material box component and places it on the transfer component, and then executes the first feeding method and first grabs the battery electrode sheet with the opposite polarity to the grabbed single-sided coated battery electrode sheet, and finally grabs a single-sided coated battery electrode sheet with the coating facing downward from the material boxes of the first material box component and the second material box component and places it on the transfer component.

2. A battery pole piece feeding system according to claim 1, characterized in that: The pick-and-place assembly comprises a first pick-and-place mechanism and a second pick-and-place mechanism, which are respectively used to grab battery pole pieces from the material boxes of the first material box assembly and the second material box assembly and transfer and place them on the transfer assembly.

3. A battery pole piece feeding system according to claim 2, characterized in that: The transfer assembly includes a first transfer table and a second transfer table, which are respectively used for the first pick-and-place mechanism and the second pick-and-place mechanism to place the battery pole pieces and supply them one by one to the next process.

4. A battery pole piece feeding system according to claim 3, characterized in that: The first transfer table and the second transfer table also perform movement correction along the X-axis and the Y-axis and rotation correction around the Z-axis on each battery electrode sheet thereon, and then supply the battery electrode sheet to the next process after correction.

5. A battery pole piece feeding system according to claim 3, characterized in that: It also includes a first waste tray and a second waste tray. The first transfer table and the second transfer table also perform appearance quality inspection on each battery electrode thereon. If a battery electrode with appearance quality that does not meet the requirements is detected, the first pick-up and placement mechanism and the second pick-up and placement mechanism will grab the battery electrode and transfer it to the first waste tray and the second waste tray respectively.

6. A battery pole piece feeding system according to claim 5, characterized in that: The two material boxes of the first material box assembly, the first transfer table and the first waste tray are evenly arranged around the first pick-and-place mechanism and constitute a first feeding module. The two material boxes of the second material box assembly, the second transfer table and the second waste tray are evenly arranged around the second pick-and-place mechanism and constitute a second feeding module. The first feeding module and the second feeding module are arranged symmetrically on the left and right, and the first transfer table and the second transfer table are close to the axis of symmetry.

7. A battery pole piece feeding system according to claim 6, characterized in that: The two material boxes of the first material box assembly are arranged opposite to each other, the first transfer table and the first waste tray are arranged opposite to each other, the two material boxes of the second material box assembly are arranged opposite to each other, and the second transfer table and the second waste tray are arranged opposite to each other.

8. A battery pole piece feeding system according to claim 7, characterized in that: The first pick-and-place mechanism and the second pick-and-place mechanism have the same structure and both include a rotating arm and a suction cup member, wherein the suction cup member is fixedly connected to the end of the rotating arm, and the rotating arm can move up and down and can rotate, so that the suction cup member of the first pick-and-place mechanism can follow the corresponding rotating arm to rotate to the top of any one of the two material boxes of the first material box assembly, the first turntable and the first waste tray, and the suction cup member of the second pick-and-place mechanism can follow the corresponding rotating arm to rotate to the top of any one of the two material boxes of the second material box assembly, the second turntable and the second waste tray.

9. A battery pole piece feeding system according to claim 8, characterized in that: The two material boxes of the first material box assembly can be automatically adjusted respectively so that the top battery electrode thereon and the plane of the first transfer table for placing the battery electrode are within a set height difference. The two material boxes of the second material box assembly can be automatically adjusted respectively so that the top battery electrode thereon and the plane of the second transfer table for placing the battery electrode are within a set height difference.

10. A battery pole piece feeding system according to claim 8 or 9, characterized in that: The first pick-and-place mechanism and the second pick-and-place mechanism both further include a rotary drive member and a linear drive member for pushing the rotary drive member to move up and down, and the rotating arm is fixedly connected to the rotating shaft of the rotary drive member.

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