Lithium battery pole piece transfer device

Abstract

The utility model discloses a lithium battery pole piece transfer device. The lithium battery pole piece transferring device comprises a magnetic attraction piece and a fixing piece, the magnetic attraction piece is connected to the fixing piece and at least used for attracting lithium battery pole pieces through magnetic force, the fixing piece is provided with a first movable part and a second movable part, and the driving unit is connected with the first movable part and drives the fixing piece to move in the first direction. The driving unit is connected with the second movable part and drives the fixing piece to move in the second direction, and the first direction and the second direction intersect. According to the utility model, the magnetic attraction piece is arranged and the lithium battery pole piece is attracted by utilizing the on-off of magnetism, so that the condition that the cycle performance of the battery is influenced and even the battery is short-circuited because the surface of the pole piece is easy to bulge when the pole piece is grabbed in a negative pressure pumping manner is effectively avoided, and the flatness of the surface of the pole piece is further ensured when the pole piece is grabbed; the cycle performance of the battery is ensured, and in addition, the structure is greatly simplified.

Description

Technical Field

[0001] The utility model relates to a lithium battery pole piece transfer device, belonging to the technical field of lithium metal battery production. Background Art

[0002] Lithium metal is usually produced using a lamination process, and during the lamination process, negative electrode lithium sheets are sucked in by an air pipe using negative pressure. To achieve negative pressure, a vacuum suction cup will inevitably act directly on the lithium sheet to achieve the negative pressure effect. However, since the lithium sheet is very thin and soft, the vacuum suction cup will cause some protrusions to appear on the surface of the lithium sheet when the negative pressure is applied, resulting in an uneven surface of the lithium sheet. As a result, during the charge and discharge process of the lithium metal battery, a tip effect will occur at the protruding position, causing rapid growth of lithium dendrites, affecting the battery's cycle performance, and even causing lithium dendrites to pierce the diaphragm, directly causing the battery to short circuit. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a lithium battery pole piece transfer device.

[0004] In order to achieve the above-mentioned utility model purpose, the technical solution adopted by the utility model includes:

[0005] The utility model provides a lithium battery pole piece transfer device, comprising a magnetic suction piece and a fixing piece, wherein the magnetic suction piece is connected to the fixing piece, and the magnetic suction piece is at least used to absorb the lithium battery pole piece by magnetic force, and the fixing piece is provided with a first movable part and a second movable part, a driving unit is connected to the first movable part and drives the fixing piece to move along a first direction, and a driving unit is connected to the second movable part and drives the fixing piece to move along a second direction, and the first direction and the second direction are arranged to be cross-arranged.

[0006] Furthermore, the magnetic attraction component includes a magnetic conductive plate and a conductive coil, the magnetic conductive plate includes a first end face and a second end face arranged back to back, the conductive coil is connected to the first end face to magnetize the magnetic conductive plate, so that the second end face is at least used to attract the lithium battery pole piece.

[0007] Furthermore, the magnetic conductive plate is a metal plate-shaped structure.

[0008] Furthermore, an insulating layer is provided on the outer surface of the magnetic conductive plate.

[0009] Furthermore, the magnetic attraction component also includes an electromagnetic switch component, which is arranged on the fixing component and connected to the conductive coil to control the power supply of the conductive coil.

[0010] Furthermore, the electromagnetic switch element is provided with a photoelectric switch valve, and the photoelectric switch valve is at least used to collect and process optical signals to control the energization of the conductive coil.

[0011] Furthermore, the transfer device also includes a non-magnetic guide cover, which is provided with a guide opening, the opening size of the guide opening is consistent with the outer size of the lithium battery pole piece, the non-magnetic guide cover is connected to the magnetic suction part, and the non-magnetic guide cover covers the second end face, and part of the second end face is exposed in the guide opening.

[0012] Furthermore, the fixing member includes a fixing plate and a connecting plate, the fixing plate includes a third end face and a fourth end face which are arranged back to back, the connecting plate is connected to the third end face, the fourth end face is arranged opposite to the first end face, and the fixing plate is connected to the magnetic conductive plate through a mounting member, the conductive coil is arranged between the fixing plate and the magnetic conductive plate, and the connecting plate is provided with a first movable part and a second movable part.

[0013] Furthermore, the mounting member includes a connecting bolt, a first mounting hole is provided on the fixing plate, and a second mounting hole is provided on the magnetic conductive plate at a position opposite to the first mounting hole. The connecting bolt is cooperated and connected with the first mounting hole and the second mounting hole to connect the fixing plate with the magnetic conductive plate.

[0014] Furthermore, the mounting member includes a plurality of the connecting bolts, and the plurality of the connecting bolts are distributed in an array between the fixing plate and the magnetic conductive plate.

[0015] Furthermore, the mounting member also includes an elastomer, which is sleeved on the outer side of the connecting bolt, and the elastomer is arranged between the fixing plate and the magnetic conductive plate in an elastically compressed state.

[0016] Furthermore, the elastic body is a spring structure.

[0017] Furthermore, the connecting plate includes a main body and a connecting portion arranged at one end of the main body, the extension directions of the main body and the connecting portion are staggered, the connecting portion is connected to the fixing plate, and the main body is provided with a first movable portion and a second movable portion.

[0018] Furthermore, the extension directions of the main body and the connecting portion are perpendicular to each other, and the cross-section of the connecting plate along its own length direction is an "L"-shaped structure, the short side of the connecting plate forms the connecting portion, and the long side of the connecting plate forms the main body.

[0019] Furthermore, the main body is provided with a weight-reducing hole, and the weight-reducing hole extends to the connecting portion.

[0020] Further, the first movable part includes a first guide rail extending along the first direction, the second movable part is provided with a second guide rail extending along the second direction, the main body is provided with adjacent first and second surfaces, the first guide rail is arranged on the first surface, and the second guide rail is arranged on the second surface.

[0021] Furthermore, the first direction and the second direction are perpendicular to each other.

[0022] Furthermore, the driving unit includes a first driving member and a second driving member, the first driving member is connected to the first movable part, and the first driving member is at least used to drive the fixed member to move along the first direction, and the second driving member is connected to the second movable part, and the second driving member is at least used to drive the fixed member to move along the second direction.

[0023] Furthermore, the first driving member includes a first screw rod, a first motor and a first mounting slider, the first mounting slider is connected to the first movable part, the first mounting slider is transmission-connected with the first screw rod, and the first motor is connected to the first screw rod to drive the first screw rod to rotate around its own axis and drive the first mounting slider to move along the first direction.

[0024] Furthermore, the second driving member includes a second screw rod, a second motor and a second mounting slider, the second mounting slider is connected to the second movable part, the second mounting slider is matched with the second screw rod for transmission connection, and the second motor is connected to the second screw rod to drive the second screw rod to rotate around its own axis and drive the second mounting slider to move along the second direction.

[0025] Compared with the prior art, the advantages of the utility model include:

[0026] The utility model adopts a magnetic suction piece to absorb the lithium battery pole piece by using the on and off of magnetism, thereby replacing the method of grabbing the pole piece by drawing negative pressure in the traditional process, and effectively avoiding the problem that grabbing the pole piece by drawing negative pressure easily causes protrusions on the pole piece surface, which in turn causes a tip effect at the protruding position during the charging and discharging process of the lithium metal battery, affecting the cycle performance of the battery and even causing a short circuit in the battery, further ensuring the flatness of the pole piece surface when grabbing the pole piece, ensuring the cycle performance of the battery, and also greatly simplifying the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application 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 only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a structural schematic diagram of a lithium battery pole piece transfer device in one embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the structure of the first driving member in one embodiment of the utility model;

[0030] Figure 3 yes Figure 1 A partial cross-sectional structural diagram of the fixing member and the magnetic attraction member in the illustrated embodiment;

[0031] Figure 4 It is a structural schematic diagram of a lithium battery pole piece transfer device with a non-magnetic guide cover in one embodiment of the utility model;

[0032] Figure 5 It is a comparison chart of the cycle performance of the lithium metal batteries obtained in Example 1 and Comparative Example 1.

[0033] Description of reference numerals:

[0034] 100, magnetic attraction member; 110, magnetic conductive plate; 111, first end face; 112, second end face; 113, second mounting hole; 120, conductive coil; 130, insulating layer; 140, electromagnetic switch member; 200, fixing member; 210, fixing plate; 211, third end face; 212, fourth end face; 213, first mounting hole; 220, connecting plate; 221, main body; 222, connecting part; 223, weight reduction hole; 310, first movable part; 320, second movable part; 400, mounting member; 410, connecting bolt; 420, elastic body; 510, non-magnetic guide cover; 520, guide port; 610, first driving member; 611, first screw rod; 612, first mounting slider. DETAILED DESCRIPTION

[0035] In view of the technical defects of the prior art that the surface of the lithium sheet is uneven due to the use of negative pressure to grab the negative electrode lithium sheet during the lamination process, thereby affecting the cycle performance and safety performance of the battery, the inventor of this case has proposed the technical solution of the utility model after long-term research and extensive practice. The technical solution, its implementation process and principle will be further explained as follows.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0037] In addition, in the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "an embodiment", "the embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The technical solution, its implementation process and principle will be further explained below in conjunction with the accompanying drawings.

[0040] See also Figure 1-Figure 4 A lithium battery pole piece transfer device includes a magnetic suction member 100 and a fixing member 200, wherein the magnetic suction member 100 is connected to the fixing member 200, and the magnetic suction member 100 is at least used to absorb the lithium battery pole piece by magnetic force, and the fixing member 200 is provided with a first movable part 310 and a second movable part 320, and a driving unit is connected to the first movable part 310 and drives the fixing member 200 to move along a first direction, and the driving unit is connected to the second movable part 320 and drives the fixing member 200 to move along a second direction, and the first direction and the second direction are arranged to be cross-arranged.

[0041] In this embodiment, the device can be used in the process of stacking lithium batteries to grab the negative electrode of the battery during the stacking of the positive and negative electrodes of the lithium battery. Lithium sheets are mostly used in the negative electrode of the lithium battery. Since impurities such as nickel, cobalt, and iron exist in the lithium sheet, the lithium sheet can be adsorbed by magnetic objects. Therefore, the device includes a magnetic component 100 and a fixed component 200. The magnetic component 100 has controllable magnetism. When the magnetic component 100 is magnetized, it can absorb the lithium sheet. When the magnetic component 100 is not magnetized, the magnetic component 100 is separated from the lithium sheet. The magnetic component 100 is placed horizontally and connected to the lower end of the fixed component 200 in a vertical direction. The fixed component 200 is provided with a first movable part 310 and a second movable part 320. The driving unit is matched and connected with the first movable part 310 and the second movable part 320, so that the driving unit drives the fixed component 200 to move in the first direction and in the second direction respectively, thereby driving the magnetic component 100 to move in the first direction and in the second direction respectively.

[0042] When stacking, the positive and negative electrodes of the lithium battery are stacked alternately in the vertical direction. Therefore, in this embodiment, the first direction is the horizontal direction, and the second direction is the vertical direction. The driving unit is connected with the first movable part 310 to drive the magnetic suction member 100 to move in the horizontal direction. Specifically, the magnetic suction member 100 is first magnetized so that the magnetic suction member 100 absorbs the lithium electrodes at the electrode storage location. The fixing member 200 drives the magnetic suction member 100 to move in the horizontal direction to the stacking location. During the movement, the lithium electrodes are kept in a horizontal state. When the lithium electrodes reach the horizontal state, the fixing member 200 drives the magnetic suction member 100 to move to the stacking location. When the stacking position is designated, the driving mechanism cooperates with the second movable part 320 and drives the fixing part 200 to move in the vertical direction, so that the magnetic suction part 100 drives the lithium sheet to move in the vertical direction until the lithium sheet is moved to the stacking position, and then controls the magnetic suction part 100 to break the magnetism, so that the magnetic suction part 100 is separated from the lithium sheet, and then drives the magnetic suction part 100 to move in the reverse direction in the vertical direction, and then drives the magnetic suction part 100 to move back to the pole piece storage position in the horizontal direction, so as to stack the next lithium sheet, and by repeating this step, the stacking process of the lithium battery is completed.

[0043] In the above structure, a magnetic suction component 100 is provided and the lithium battery pole piece is sucked by utilizing the on and off of magnetism, thereby replacing the method of grabbing the pole piece by drawing negative pressure in the traditional process. This effectively avoids the problem that the pole piece is easily grasped by drawing negative pressure, which may cause protrusions on the pole piece surface, thereby causing a tip effect at the protruding position during the charging and discharging process of the lithium metal battery, affecting the cycle performance of the battery and even causing a short circuit in the battery. This further ensures the flatness of the pole piece surface when grabbing the pole piece, thereby ensuring the cycle performance of the battery. In addition, by utilizing magnetic force to absorb the pole piece, the structure is greatly simplified, effectively avoiding the complicated structure caused by the compressor and various vacuum pipes used in the negative pressure method.

[0044] In the specific structure of the magnetic attraction member 100, the magnetic attraction member 100 includes a magnetic plate 110 and a conductive coil 120. The magnetic plate 110 includes a first end face 111 and a second end face 112 that are arranged back to back. The conductive coil 120 is connected to the first end face 111 to conduct magnetism to the magnetic plate 110, so that the second end face 112 is at least used to attract the lithium battery pole piece. The magnetic plate is a metal plate-shaped structure. An insulating layer 130 is provided on the outer surface of the magnetic plate 110.

[0045] In this embodiment, the magnetic conductive plate 110 can be a rectangular plate-like structure to adapt to the shape of a rectangular pole piece, and the outer dimensions of the second end face 112 of the magnetic conductive plate 110 are not less than the outer dimensions of the pole piece, so that the second end face 112 completely covers the pole piece, and the pole piece can be placed horizontally when being absorbed, and the two end faces of the magnetic conductive plate 110 in the vertical direction respectively form a first end face 111 and a second end face 112, wherein the upper end face of the magnetic conductive plate 110 is the first end face 111, and the lower end face of the magnetic conductive plate 110 is the second end face 112, and the conductive coil 120 is placed vertically with its axial direction in the vertical direction, and one end of the bottom of the conductive coil 120 is connected to the upper end face of the magnetic conductive plate 110, that is, the first end face 111, and the conductive coil 120 is connected at the center of the magnetic conductive plate 110, so that the magnetic force is transmitted more evenly, thereby ensuring the stability of absorbing the lithium sheet. When the conductive coil 120 is powered on, the conductive coil 120 generates electromagnetic induction, so that the magnetic plate 110 is magnetically conductive, and the magnetic plate 110 can absorb the lithium sheet through the magnetism of the second end face 112. When the conductive coil 120 is powered off, the electromagnetic induction of the conductive coil 120 disappears, and the magnetic plate 110 is demagnetized, so that the magnetic plate 110 is separated from the lithium sheet. In the selection of the magnetic plate 110, the magnetic plate 110 can be selected from a metal material structure to better achieve the magnetic conductive effect. In addition, the surface of the magnetic plate 110 is also covered with an insulating layer 130, which can effectively prevent the magnetic plate 110 from having static electricity, thereby affecting the absorption effect of the lithium sheet. Among them, the insulating layer 130 can be formed by coating insulating paint on the surface of the magnetic plate 110, which is simple and convenient to manufacture.

[0046] In addition, in the specific work of controlling the on and off of the conductive coil 120, the magnetic attraction member 100 further includes an electromagnetic switch member 140, which is disposed on the fixing member 200 and connected to the conductive coil 120 to control the energization of the conductive coil 120. The electromagnetic switch member 140 is provided with a photoelectric switch valve, which is at least used to collect and process optical signals to control the energization of the conductive coil 120.

[0047] In this embodiment, the electromagnetic switch is connected to the conductive coil 120 to control the on and off of the conductive coil 120, wherein the electromagnetic switch includes a photoelectric switch valve, and the electromagnetic switch is connected to the fixing member 200. When the magnetic conductive plate 110 needs to be magnetized, a set power-on beam signal is emitted to the photoelectric switch valve, and the beam signal can be infrared light or visible light. After receiving the beam, the photoelectric switch valve performs judgment processing. After judging that it is a power-on signal, the switch valve is opened to energize the conductive coil 120. When the magnetic conductive plate 110 needs to be demagnetized, a power-off beam signal is emitted to the photoelectric switch valve. After receiving the beam, the photoelectric switch valve judges that it is a power-off signal, and closes the switch valve to deenergize the conductive coil 120. Using the photoelectric switch valve to control the on and off of the conductive coil 120 is simple and convenient to operate, has high control accuracy, and a high degree of automation. Among them, the electromagnetic switch can be bonded to the fixing member 200 by glue, or connected to the fixing member 200 by screws, which is convenient for installation, disassembly and maintenance.

[0048] In addition, the lithium battery pole piece transfer device also includes a non-magnetic guide cover 510, which is provided with a guide opening 520. The opening size of the guide opening 520 is consistent with the outer size of the lithium battery pole piece. The non-magnetic guide cover 510 is connected to the magnetic suction component 100, and the non-magnetic guide cover 510 covers the second end face 112, and a portion of the second end face 112 is exposed in the guide opening 520.

[0049] In this embodiment, if Figure 4As shown, a non-magnetic guide cover 510 is also provided, and the non-magnetic guide cover 510 can be a rectangular structure. A through guide opening 520 is provided on one end face of the non-magnetic guide cover 510 along the thickness direction, wherein the guide opening is rectangular, and its outer dimensions are consistent with the outer dimensions of the lithium battery pole piece to be absorbed. When in use, the non-magnetic guide cover 510 is first connected to the magnetic suction component 100, so that one end face of the non-magnetic guide cover 510 is in contact with the second end face 112, and only the second end face 112 located at the guide opening 520 is exposed to the outside. Since the non-magnetic guide cover 510 is made of non-magnetic material, when the magnetic plate is energized and magnetized, the non-magnetic guide cover 510 can shield the magnetism of the second end face 112 except the guide opening 520, so that only the second end face 112 at the guide opening 520 can absorb the pole piece. When it is necessary to transfer the pole piece, the non-magnetic guide cover 510 is moved to the placement area of ​​the pole piece, and the guide opening 520 is aligned with the pole piece. Thereafter, the magnetic plate 110 is energized and magnetized, and the second end face 112 located at the guide opening 520 attracts the corresponding pole piece. When it is necessary to place the pole piece, the fixing part 200 is moved to the specified position through the driving unit, and the non-magnetic guide cover 510 is moved close to the placement area, so that the guide opening 520 corresponds to the pole piece placement position, and the magnetic plate 110 is demagnetized, so that the pole piece falls from the guide opening 520. The guide opening 520 can guide and limit the absorption and placement of the pole piece, effectively avoiding the displacement of the pole piece during the absorption or placement process, and can effectively ensure the accuracy of the falling position of the pole piece.

[0050] In addition, the non-magnetic guide cover 510 and the magnetic suction component 100 can be quickly disassembled and connected by snaps, and the non-magnetic guide cover 510 with corresponding guide opening 520 size can be specified according to the specifications of the sucked pole piece, thereby further improving the applicability of the device.

[0051] In the specific structure of the fixed plate 210, the fixing member 200 includes a fixing plate 210 and a connecting plate 220, the fixing plate 210 includes a third end face 211 and a fourth end face 212 which are arranged back to back, the connecting plate 220 is connected to the third end face 211, the fourth end face 212 is arranged opposite to the first end face 111, and the fixing plate 210 is connected to the magnetic conductive plate 110 through the mounting member 400, the conductive coil 120 is arranged between the fixing plate 210 and the magnetic conductive plate 110, and the connecting plate 220 is provided with a first movable part 310 and a second movable part 320.

[0052] In this embodiment, the fixed plate 210 is also a rectangular plate-shaped structure. The fixed plate 210 is placed horizontally. The center point of the fixed plate 210 and the center point of the magnetic conductive plate 110 are on the same axis. The axis is coaxially arranged with the conductive coil 120. The upper end surface of the fixed plate 210 is the third end surface 211, and the lower end surface of the fixed plate 210 is the fourth end surface 212. The magnetic conductive plate 110 is arranged on the lower side of the fixed plate 210, wherein the first end surface 111 of the magnetic conductive plate 110 is arranged opposite to the fourth end surface 212 of the fixed plate 210 and is connected to the fixed plate 210 through the mounting member 40. 0 are connected to each other, so that the magnetic conductive plate 110 is connected to the fixed plate 210, and there is a certain gap between the magnetic conductive plate 110 and the fixed plate 210, and the conductive coil 120 is placed in the gap, and the upper end surface of the fixed plate 210 is connected to the connecting plate 220, and the connecting plate 220 is provided with a first movable part 310 and a second movable part 320, and the driving unit is movably connected to the connecting plate 220 to drive the fixed plate 210 to move, and the fixed plate 210 is used to fix the magnetic conductive plate 110 to drive the magnetic conductive plate 110 to move accordingly. By setting the fixed plate 210 to be connected with the magnetic conductive plate 110, the conductive coil 120 is set between the fixed plate 210 and the magnetic conductive plate 110, and the conductive coil 120 is further protected. In addition, the fixed plate 210 is a non-magnetic conductive material structure, which ensures the stability of the conductive coil 120 transmitting magnetic force to the magnetic conductive plate 110, and effectively avoids the situation of uneven magnetic force of the magnetic conductive plate 110 caused by magnetic leakage.

[0053] Specifically, the mounting member 400 includes a connecting bolt 410, a first mounting hole 213 is provided on the fixing plate 210, a second mounting hole 113 is provided on the magnetic conductive plate 110 at a position opposite to the first mounting hole 213, and the connecting bolt 410 cooperates with the first mounting hole 213 and the second mounting hole 113 to connect the fixing plate 210 with the magnetic conductive plate 110. The mounting member 400 includes a plurality of connecting bolts 410, and the plurality of connecting bolts 410 are distributed between the fixing plate 210 and the magnetic conductive plate 110 in an array.

[0054] On the connection structure between the fixed plate 210 and the magnetic conductive plate 110, the mounting member 400 includes a connecting bolt 410, through which the fixed plate 210 and the magnetic conductive plate 110 are connected to each other. In the present embodiment, four connecting bolts 410 are provided, and the four connecting bolts 410 are distributed between the magnetic conductive plate 110 and the fixed plate 210 in a 2×2 rectangular array, and the four connecting bolts 410 are respectively located at the four corners of the magnetic conductive plate 110, thereby improving the stability of the connection between the magnetic conductive plate 110 and the fixed plate 210. Four first mounting holes 213 are provided at corresponding positions on the fixed plate 210, wherein the first mounting hole 213 is a through hole structure, and four second mounting holes 113 are provided at corresponding positions on the first end face 111 of the magnetic conductive plate 110, and the second mounting holes 113 are blind hole structures, thereby ensuring the flatness of the second end face 112, so that the second end face 112 can better absorb the lithium sheet. One end of the connecting bolt 410 is passed through the first mounting hole 213 and is connected to the second mounting hole 113 so that the magnetic conductive plate 110 and the fixed plate 210 are connected to each other. In addition, by controlling the distance that the connecting bolt 410 is screwed into the second mounting hole 113, the size of the gap between the magnetic conductive plate 110 and the fixed plate 210 can be adjusted, so that conductive coils 120 of different sizes can be placed, thereby adapting to different magnetic force requirements.

[0055] In addition, the mounting member 400 further includes an elastic body 420, which is sleeved on the outer side of the connecting bolt 410, and the elastic body 420 is disposed between the fixing plate 210 and the magnetic conductive plate 110 in an elastically compressed state. The elastic body 420 is a spring structure.

[0056] In this embodiment, an elastic body 420 is further provided between the magnetic conductive plate 110 and the fixed plate 210. The elastic body 420 is provided in the gap between the magnetic conductive plate 110 and the fixed plate 210 in an elastically compressed state, and can provide elastic buffering when the magnetic conductive plate 110 absorbs and places lithium sheets, effectively offsetting hard contact and further protecting the lithium sheets. Specifically, the elastic member can be sleeved on the connecting bolt 410, and four elastic members are correspondingly provided. Each connecting bolt 410 is sleeved with an elastic body 420, which further provides a buffering effect on the connection and ensures the stability of the connection. The elastic body 420 can be selected from a spring structure, or an elastic structure such as a columnar rubber.

[0057] In terms of the specific structure of the connecting plate 220, the connecting plate 220 includes a body 221 and a connecting portion 222 arranged at one end of the body 221. The extension directions of the body 221 and the connecting portion 222 are staggered. The connecting portion 222 is connected to the fixing plate 210. The body 221 is provided with a first movable portion 310 and a second movable portion 320. The extension directions of the body 221 and the connecting portion 222 are perpendicular to each other, and the cross-section of the connecting plate 220 along its own length direction is an "L"-shaped structure. The short side of the connecting plate 220 forms the connecting portion 222, and the long side of the connecting plate 220 forms the body 221. The body 221 is provided with a weight-reducing hole 223, and the weight-reducing hole 223 extends to the connecting portion 222.

[0058] In this embodiment, the body 221 of the connecting plate 220 extends in the vertical direction, the connecting portion 222 is located at the lower end of the body 221, and the connecting portion 222 can extend in the horizontal direction, so that the cross section of the connecting plate 220 in the vertical direction is an "L"-shaped structure, the first movable portion 310 and the second movable portion 320 are arranged on the body 221, and the connecting portion 222 at the bottom of the body 221 is connected to the upper end surface of the fixing plate 210, and the extending directions of the connecting portion 222 and the body 221 are staggered, which improves the supporting performance of the body 221 and ensures the stability of the driving unit when driving the fixing member 200. In other embodiments, the cross section of the connecting plate 220 in the vertical direction can also be an inverted "T"-shaped structure to ensure the connection stability between the connecting plate 220 and the fixing plate 210. In addition, a weight-reducing hole 223 is provided on the main body 221, and the weight-reducing hole 223 extends from the main body 221 to the connecting portion 222. The weight-reducing hole 223 forms an arched opening on the main body 221, and the bottom of the arched opening extends to the connecting portion 222, and divides the connecting portion 222 into two parts, and then the two parts are respectively connected to the fixing plate 210. On the one hand, the weight-reducing hole 223 can reduce the weight of the connecting plate 220, and on the other hand, the weight-reducing hole 223 forms an arched opening on the main body 221, which can improve the load resistance of the main body 221, thereby ensuring the stability of the connection with the drive unit.

[0059] Specifically, the first movable part 310 includes a first guide rail extending along a first direction, the second movable part 320 includes a second guide rail extending along a second direction, the body 221 includes a first surface and a second surface adjacent to each other, the first guide rail is arranged on the first surface, and the second guide rail is arranged on the second surface. The first direction and the second direction are perpendicular.

[0060] In this embodiment, the body 221 is a rectangular plate-like structure, the body 221 is arranged in the vertical direction, the length direction of the body 221 is the vertical direction, the width direction of the body 221 is consistent with the width direction of the fixed plate 210, the top surface of the body 221 is formed as a first surface, and the side surface adjacent to the top surface forms a second surface, so that the first direction is the length direction of the body 221, and the second direction is the length direction of the body 221, that is, the vertical direction. The first guide rail is installed and connected on the first surface, and the second guide rail is installed and connected on the second surface. The driving unit cooperates with the first guide rail located on the first surface to be movably connected to drive the connecting plate 220 to move along the first direction. In addition, the driving unit can also cooperate with the second guide rail located on the second surface to be movably connected to drive the connecting plate 220 to move along the second direction to achieve the need for the absorption and placement position change of the lithium sheet. The first guide rail extending along the first direction and the second guide rail extending along the second direction are provided, which can guide and limit the movement of the magnetic conductive plate 110 in the first direction and the second direction, thereby improving the accuracy of the absorption and transfer of the lithium sheet.

[0061] In the specific structure of the driving unit, the driving unit includes a first driving member 610 and a second driving member, the first driving member 610 is connected to the first movable part 310, and the first driving member 610 is at least used to drive the fixed member 200 to move along the first direction, and the second driving member is connected to the second movable part 320, and the second driving member is at least used to drive the fixed member 200 to move along the second direction. The first driving member 610 includes a first screw rod 611, a first motor and a first mounting slider 612, the first mounting slider 612 is connected to the first movable part, the first mounting slider 612 is connected to the first screw rod 611 in a transmission connection, the first motor is connected to the first screw rod 611 to drive the first screw rod 611 to rotate around its own axis, and drive the first mounting slider 612 to move along the first direction. In addition, the second driving member includes a second screw rod, a second motor and a second mounting slider, the second mounting slider is connected to the second movable part, the second mounting slider is connected to the second screw rod in a transmission connection, and the second motor is connected to the second screw rod to drive the second screw rod to rotate around its own axis, and drive the second mounting slider to move along the second direction.

[0062] In this embodiment, if Figure 1 , 2As shown, the driving unit includes a first driving member 610 and a second driving member, wherein the first driving member 610 is movably connected to the first movable part 310, that is, the first driving member 610 is connected in cooperation with the first guide rail, and can drive the fixed member 200 to move along the first direction, and the second driving member is connected to the second movable part 320, that is, the second driving member is connected in cooperation with the second guide rail, and can drive the fixed member 200 to move along the second direction. The first driving member 610 includes a first screw rod 611 and a first motor, the output end of the first motor is connected to one end of the first screw rod 611, and drives the first screw rod 611 to rotate around its own axis, the first mounting slider 612 is connected in cooperation with the first screw rod 611, when the first screw rod 611 rotates, the first mounting slider 612 moves on the first screw rod 611, and the first mounting slider 612 is connected to the first movable part 310, so that the first motor can drive the fixed member 200 to move along the first direction, wherein the first screw rod 611 extends along the first direction. In addition, Figure 2 is a schematic diagram of the structure of the first driving member 610, and the structure of the second driving member is consistent with that of the first driving member 610, so the schematic diagram of the structure of the second driving member is not shown in the figure. The second driving member includes a second motor, a second screw rod and a second mounting slider, wherein the output end of the second motor is connected to one end of the second screw rod and drives the second screw rod to rotate around its own axis, the second mounting slider is connected with the second screw rod, when the second screw rod rotates, the second mounting slider moves on the second screw rod, and the second mounting slider is connected to the second movable part 320, so that the second motor can drive the fixing member 200 to move along the second direction.

[0063] The first driving member 610 drives the fixing member 200 to first move horizontally to a certain height above the lithium sheet placement box. When the photoelectric switch valve receives the light-sensing signal, the conductive coil starts to be energized to make the magnetic plate magnetic. Then the second driving member drives the fixing member to start vertically descending to the surface of the lithium sheet so that it is absorbed by the magnetic plate. After taking the lithium sheet, the first driving member 610 drives the fixing member to move horizontally from above the lithium sheet placement box to above the stacking table. After it is in place, the second driving member drives the fixing member 200 to start vertically descending to place the lithium sheet on the stacking table. After completion, the photoelectric switch valve receives the light-sensing signal and cuts off the power to make the magnetic plate lose its magnetism, thereby completing the placement of the lithium sheet. After the whole set of actions is completed, the first driving member 610 and the second driving member will reset and perform the above actions again to grab the lithium sheet.

[0064] The technical scheme of the present invention is further described in detail below in conjunction with several preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following embodiments are usually based on conventional conditions.

[0065] Example 1

[0066] The lithium sheet grabbing method adopts the method of the utility model, the battery system adopts a high-nickel lithium metal battery system, the number of lithium sheet layers is preferably 3 to 20, and the injection coefficient ratio is preferably 1 to 2 g / Ah.

[0067] Comparative Example 1

[0068] The lithium sheet grabbing method adopts the negative pressure suction method, the battery system adopts the high nickel lithium metal battery system, the number of lithium sheet layers is preferably 3 to 20 layers, and the injection coefficient ratio is preferably 1 to 2g / Ah.

[0069] The lithium battery with a laminated structure formed by the pole pieces grabbed in Example 1 and Comparative 1 was used as a sample to test the battery cycle performance. Figure 5 As shown, the battery cycle performance of the lithium battery formed by the electrode piece grabbed in Example 1 is greater than the battery cycle performance of the lithium battery formed by the electrode piece grabbed in Comparative Example 1.

[0070] It should be understood that the above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the utility model.

Claims

1. A lithium battery pole piece transfer device, characterized in that: include: A magnetic member, a fixing member and a driving unit, wherein the magnetic member is connected to the fixing member, and the magnetic member is at least used to attract the lithium battery pole piece by magnetic force, the fixing member is provided with a first movable part and a second movable part, the driving unit is connected to the first movable part and drives the fixing member to move along a first direction, the driving unit is connected to the second movable part and drives the fixing member to move along a second direction, and the first direction and the second direction are arranged to be cross-arranged.

2. A lithium battery pole piece transfer device according to claim 1, characterized in that: The magnetic attraction member includes a magnetic conductive plate and a conductive coil, the magnetic conductive plate includes a first end face and a second end face that are arranged back to back, the conductive coil is connected to the first end face to conduct magnetism to the magnetic conductive plate, so that the second end face is at least used to attract the lithium battery pole piece; And / or, the magnetic conductive plate is a metal plate structure; And / or, an insulating layer is provided on the outer surface of the magnetic conductive plate.

3. A lithium battery pole piece transfer device according to claim 2, characterized in that: The magnetic attraction member further includes an electromagnetic switch member, which is disposed on the fixing member and connected to the conductive coil to control the energization of the conductive coil; And / or, the electromagnetic switch element is provided with a photoelectric switch valve, and the photoelectric switch valve is at least used for collecting and processing light signals to control the energization of the conductive coil.

4. A lithium battery pole piece transfer device according to claim 2, characterized in that: Also includes: A non-magnetic guide cover body is provided with a guide opening, the opening size of the guide opening is consistent with the outer size of the lithium battery pole piece, the non-magnetic guide cover body is connected to the magnetic suction part, and the non-magnetic guide cover body covers the second end face and fits the second end face, and part of the second end face is exposed in the guide opening.

5. A lithium battery pole piece transfer device according to claim 2, characterized in that: The fixing member includes a fixing plate and a connecting plate, the fixing plate includes a third end face and a fourth end face arranged back to back, the connecting plate is connected to the third end face, the fourth end face is arranged opposite to the first end face, and the fixing plate is connected to the magnetic conductive plate through a mounting member, the conductive coil is arranged between the fixing plate and the magnetic conductive plate, and the connecting plate is provided with a first movable part and a second movable part.

6. A lithium battery pole piece transfer device according to claim 5, characterized in that: The mounting member includes a connecting bolt, a first mounting hole is provided on the fixing plate, a second mounting hole is provided on the magnetic conductive plate at a position opposite to the first mounting hole, and the connecting bolt is matched and connected with the first mounting hole and the second mounting hole so that the fixing plate is connected to the magnetic conductive plate; And / or, the mounting member includes a plurality of the connecting bolts, and the plurality of the connecting bolts are distributed in an array between the fixing plate and the magnetic conductive plate.

7. A lithium battery pole piece transfer device according to claim 6, characterized in that: The mounting member further comprises an elastic body, the elastic body is sleeved on the outer side of the connecting bolt, and the elastic body is arranged between the fixing plate and the magnetic conductive plate in an elastically compressed state; And / or, the elastic body is a spring structure.

8. A lithium battery pole piece transfer device according to claim 5, characterized in that: The connecting plate comprises a body and a connecting portion arranged at one end of the body, the extending directions of the body and the connecting portion are staggered, the connecting portion is connected to the fixing plate, and the body is provided with a first movable portion and a second movable portion; And / or, the extension directions of the main body and the connecting portion are perpendicular to each other, and the cross section of the connecting plate along its own length direction is an "L"-shaped structure, the short side of the connecting plate forms the connecting portion, and the long side of the connecting plate forms the main body; And / or, the main body is provided with a weight-reducing hole, and the weight-reducing hole extends to the connecting portion.

9. A lithium battery pole piece transfer device according to claim 8, characterized in that: The first movable part includes a first guide rail extending along the first direction, the second movable part is provided with a second guide rail extending along the second direction, the body is provided with a first surface and a second surface adjacent to each other, the first guide rail is provided on the first surface, and the second guide rail is provided on the second surface; And / or, the first direction and the second direction are perpendicular to each other.

10. A lithium battery pole piece transfer device according to claim 1, characterized in that: The driving unit includes a first driving member and a second driving member, the first driving member is connected to the first movable part and is at least used to drive the fixed member to move along the first direction, the second driving member is connected to the second movable part and is at least used to drive the fixed member to move along the second direction; And / or, the first driving member includes a first screw rod, a first motor and a first mounting slider, the first mounting slider is connected to the first movable portion, the first mounting slider is in driving connection with the first screw rod, and the first motor is connected to the first screw rod to drive the first screw rod to rotate around its own axis and drive the first mounting slider to move along the first direction; And / or, the second driving member includes a second screw rod, a second motor and a second mounting slider, the second mounting slider is connected to the second movable part, the second mounting slider is matched with the second screw rod for transmission connection, the second motor is connected to the second screw rod to drive the second screw rod to rotate around its own axis and drive the second mounting slider to move along the second direction.

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