Pole piece positioning mechanism and pole piece lamination device

Abstract

The utility model relates to the technical field of lithium battery production, in particular to a pole piece positioning mechanism and a pole piece laminating device. The pole piece positioning mechanism comprises a positioning part, the positioning part comprises a bearing end wall, a first side peripheral wall and a second side peripheral wall, the bearing end wall is provided with a bearing end face used for bearing a pole piece, the vertical height of the bearing end face is gradually reduced in the first horizontal direction to form a first higher side and a first lower side, and the vertical height of the bearing end face is gradually reduced in the second horizontal direction perpendicular to the first horizontal direction to form a second lower side. The vertical height of the bearing end face is gradually reduced to form a second higher side and a second lower side, the first side peripheral wall is connected to the bearing end wall and arranged on the first lower side, and the second side peripheral wall is connected to the bearing end wall and arranged on the second lower side. The pole piece lamination device comprises the pole piece positioning mechanism. The pole piece positioning mechanism and the pole piece lamination device provided by the utility model are simple in overall structure, high in pole piece positioning efficiency and easy to control in pole piece positioning precision.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery production, in particular to a pole piece positioning mechanism and a pole piece stacking device. Background Art

[0002] In the production process of laminated batteries, it is generally necessary to grab and move the cut pole pieces through the pole piece loading robot, so as to move the pole pieces to the lamination platform for lamination to form laminated batteries. In the process of pole piece lamination, the positioning accuracy of the pole pieces directly affects the accuracy of the lamination, and then affects the performance of the laminated battery, so it is particularly important to ensure the positioning accuracy of the pole pieces. However, the current positioning method of the pole pieces has defects such as low positioning efficiency and difficult to control positioning accuracy. Utility Model Content

[0003] The main purpose of the utility model is to provide a pole piece positioning mechanism and a pole piece stacking device, aiming to solve the technical problems of low positioning efficiency and difficult to control positioning accuracy in the current pole piece positioning method.

[0004] To achieve the above object, the utility model proposes a pole piece positioning mechanism, including a positioning part, wherein the positioning part includes:

[0005] A receiving end wall, the receiving end wall having a receiving end surface for carrying a pole piece, wherein along a first horizontal direction, the vertical height of the receiving end surface gradually decreases to form a first higher side and a first lower side, and along a second horizontal direction perpendicular to the first horizontal direction, the vertical height of the receiving end surface gradually decreases to form a second higher side and a second lower side;

[0006] A first side peripheral wall, the first side peripheral wall is connected to the receiving end wall, and the first side peripheral wall is arranged on the first lower side, and is used to limit the displacement of the pole piece in the first horizontal direction;

[0007] A second side peripheral wall, wherein the second side peripheral wall is connected to the receiving end wall and is disposed on the second lower side, and is used to limit the displacement of the pole piece in the second horizontal direction.

[0008] In some embodiments, along the first horizontal direction, the angle α between the receiving end surface and the horizontal plane satisfies: 10°≤α≤20°, and along the second horizontal direction, the angle β between the receiving end surface and the horizontal plane satisfies: 10°≤β≤20°.

[0009] In some embodiments, a mounting groove is provided on one side of the receiving end wall close to the receiving end surface, a rolling portion is provided in the mounting groove, and the rolling portion is in contact with the pole piece for conveying the pole piece.

[0010] In some embodiments, an adsorption hole is provided on one side of the receiving end wall close to the receiving end surface, and the adsorption hole is connected to an adsorption pump so that the adsorption hole has a negative pressure adsorption state for adsorbing the pole piece.

[0011] In some embodiments, the first side peripheral wall and the second side peripheral wall are provided with a protrusion, and along the vertical height direction of the receiving end surface, the protrusion extends from one end of the first side peripheral wall to the other end opposite to the first side peripheral wall, and the protrusion extends from one end of the second side peripheral wall to the other end opposite to the second side peripheral wall;

[0012] Wherein, the pole piece abuts against the protrusion.

[0013] In some embodiments, the protrusion is provided with an arc-shaped side wall on the abutting side of the protrusion and the pole piece, and the arc-shaped side wall abuts against the pole piece.

[0014] In some embodiments, a steel sheet layer is provided on the arc-shaped side wall at the abutting side of the arc-shaped side wall and the pole piece, and the steel sheet layer abuts against the pole piece.

[0015] In some embodiments, a rotating motor is further included, wherein the rotating motor is connected to a rotating shaft, and the rotating shaft is provided with a fixing portion, and the fixing portion includes a plurality of fixing brackets;

[0016] Wherein, the pole piece positioning mechanism includes a plurality of positioning parts, each of which is correspondingly arranged on each of the fixing brackets, and when the rotating motor is in a starting state, the plurality of positioning parts perform circular motion around the rotating axis.

[0017] Correspondingly, the utility model also proposes a pole piece stacking device, including the pole piece positioning mechanism described in any of the above embodiments.

[0018] In some embodiments, the pole piece stacking device further comprises:

[0019] A pole piece transmission mechanism, wherein the pole piece transmission mechanism is provided with a plurality of rollers, and the rollers are used to transmit the pole piece to the pole piece positioning mechanism;

[0020] A CCD detection camera is used to record the receiving state of the pole piece on the pole piece positioning mechanism.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] In the technical solution of the utility model, a pole piece positioning mechanism is provided for the precise positioning of the pole piece. The cut pole piece is firstly conveyed on the conveying mechanism. Then, at the conveying end of the conveying mechanism, the pole piece moves to the positioning portion under the action of the initial velocity and its own gravity, and is received on the receiving end face of the receiving end wall along a first horizontal direction. For example, the first horizontal direction may be the length direction of the receiving end face. The receiving end face is inclined to form a first higher side and a first lower side, and a first side peripheral wall is provided on the first lower side of the receiving end face. A second horizontal direction perpendicular to the first horizontal direction, for example, the second horizontal direction can be the width direction of the receiving end face, and the receiving end face is also inclined to form a second higher side and a second lower side, and a second side peripheral wall is provided on the second lower side of the receiving end face, so that a semi-closed lowest potential end angle will be formed on the receiving end face, and the pole piece will continue to slide along the inclined receiving end face under the action of its own gravity, and finally be positioned at the above-mentioned lowest potential end angle, thereby realizing precise positioning of the pole piece, ensuring the accuracy of subsequent stacking processes, and improving the battery performance of the stacked battery.

[0023] The pole piece positioning mechanism provided by the utility model has a simple overall structure, high pole piece positioning efficiency, and easy control of pole piece positioning accuracy, which can ensure the positioning accuracy of the pole piece before stacking. The pole piece can be blocked in a predetermined position by using the first side peripheral wall and the second side peripheral wall, so as to facilitate the subsequent use of a pole piece loading robot to transport the positioned pole piece to the stacking platform, and stack the pole pieces on the stacking platform, thereby obtaining a stacked battery.

[0024] The pole piece stacking device using the pole piece positioning mechanism has a simple and efficient stacking operation method, which can ensure the accuracy of battery stacking and improve the battery performance of the stacked battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model 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 of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the overall structure of a pole piece positioning mechanism provided in one embodiment of the utility model;

[0027] Figure 2 A schematic diagram of the overall structure of a positioning part in a pole piece positioning mechanism provided by an embodiment of the utility model;

[0028] Figure 3This is a schematic diagram of the overall structure of a pole piece stacking device provided in another embodiment of the utility model.

[0029] Description of Figure Numbers:

[0030] 100- positioning unit;

[0031] 110- positioning groove;

[0032] 111- receiving end wall; 112- receiving end surface; 113- first side peripheral wall; 114- second side peripheral wall; 115- rolling portion; 116- adsorption hole; 117- protrusion; 118- arcuate side wall;

[0033] 1121 - first higher side; 1122 - first lower side; 1123 - second higher side; 1124 - second lower side;

[0034] 200-rotating motor;

[0035] 300-rotation axis;

[0036] 400-fixed bracket;

[0037] 500-pole piece transmission mechanism;

[0038] 510-Roller;

[0039] X-first horizontal direction;

[0040] Y - Second horizontal direction.

[0041] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or", "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0045] In the production process of laminated batteries, it is generally necessary to grab and move the cut pole pieces through the pole piece loading robot, so as to move the pole pieces to the lamination platform for lamination to form laminated batteries. In the process of pole piece lamination, the positioning accuracy of the pole pieces directly affects the accuracy of the lamination, and then affects the performance of the laminated battery, so it is particularly important to ensure the positioning accuracy of the pole pieces. However, the current positioning method of the pole pieces has defects such as low positioning efficiency and difficult to control positioning accuracy.

[0046] In order to solve the technical problems of low positioning efficiency and difficult to control positioning accuracy in the current pole piece positioning method, refer to Figure 1 to Figure 2 An embodiment of the utility model provides a pole piece positioning mechanism, including a positioning portion 100, the positioning portion 100 includes a receiving end wall 111, a first side peripheral wall 113 and a second side peripheral wall 114, the receiving end wall 111 has a receiving end surface 112 for carrying the pole piece, along the first horizontal direction X, the vertical height of the receiving end surface 112 gradually decreases to form a first higher side 1121 and a first lower side 1122, along the second horizontal direction Y perpendicular to the first horizontal direction X, the vertical height of the receiving end surface 112 gradually decreases to form a second higher side 1123 and a second lower side 1124, the first side peripheral wall 113 is connected to the receiving end wall 111, and the first side peripheral wall 113 is arranged on the first lower side 1122, for limiting the displacement of the pole piece in the first horizontal direction X, the second side peripheral wall 114 is connected to the receiving end wall 111, and the second side peripheral wall 114 is arranged on the second lower side 1124, for limiting the displacement of the pole piece in the second horizontal direction Y.

[0047] Specifically, in the present embodiment, a pole piece positioning mechanism is provided for accurate positioning of the pole piece. The cut pole piece is firstly conveyed on the conveying mechanism. Then, at the conveying end of the conveying mechanism, the pole piece moves to the positioning portion 100 under the action of the initial velocity and its own gravity, and is received on the receiving end surface 112 of the receiving end wall 111 along the first horizontal direction X. For example, the first horizontal direction X may be the length direction of the receiving end surface 112. The receiving end surface 112 is inclined to form a first higher side 1121 and a first lower side 1122. A first side peripheral wall 113 is provided on the first lower side 1122 of the receiving end surface 112. A second horizontal direction Y perpendicular to the first horizontal direction X, for example, the second horizontal direction Y can be the width direction of the receiving end face 112, and the receiving end face 112 is also inclined to form a second higher side 1123 and a second lower side 1124, and a second side peripheral wall 114 is provided on the second lower side 1124 of the receiving end face 112, so that a semi-closed lowest potential end angle will be formed on the receiving end face 112, and the pole piece will continue to slide along the inclined receiving end face 112 under the action of its own gravity, and finally be positioned at the above-mentioned lowest potential end angle, thereby realizing precise positioning of the pole piece, ensuring the accuracy of subsequent lamination processes, and improving the battery performance of the laminated battery.

[0048] The pole piece positioning mechanism provided by the utility model has a simple overall structure, high pole piece positioning efficiency, and easy control of pole piece positioning accuracy, which can ensure the positioning accuracy of the pole piece before lamination. The first side peripheral wall 113 and the second side peripheral wall 114 can be used to block the pole piece in a predetermined position, so as to facilitate the subsequent use of a pole piece loading robot to transport the positioned pole piece to the lamination platform, and realize pole piece lamination on the lamination platform, thereby obtaining a laminated battery.

[0049] In some embodiments, the positioning portion 100 may include a positioning groove 110, and the receiving end wall 111 is disposed in the positioning groove 110. Exemplarily, for example, the positioning portion 100 may be a tray structure, and accordingly, the positioning groove 110 is a tray bracket, the receiving end wall 111 is a bottom side wall of the bracket, and the receiving end surface 112 is an upper surface of the bottom side wall, and along the length direction of the bracket (i.e., the first horizontal direction X), the upper surface of the bottom side wall is relatively inclined, and along the width direction of the bracket (i.e., the second horizontal direction Y), the upper surface of the bottom side wall is also relatively inclined. In other words, along the length direction of the bracket, one end of the upper surface of the bottom side wall is high, and the other end of the upper surface of the bottom side wall is low, forming a slope-shaped structure. Similarly, along the width direction of the bracket, one end of the upper surface of the bottom side wall is high, and the other end of the upper surface of the bottom side wall is low, forming a slope-shaped structure. In this embodiment, when the cut electrode pieces are moved to the tray by the conveying mechanism under the action of initial velocity and gravity, they will be received on the upper surface of the bottom side wall of the tray. Since the upper surface of the bottom side wall of the tray is not only a sloped structure along the length direction of the bracket, but also a sloped structure along the width direction of the bracket, under the action of the electrode piece's own gravity, it will slide along the upper surface of the inclined bottom side wall of the tray to the lowest potential end corner, and achieve precise positioning at the lowest potential end corner, so as to facilitate the use of the electrode piece loading robot to clamp the electrode piece in the subsequent process and transfer the electrode piece to the stacking platform for stacking.

[0050] The receiving end surface 112 of the positioning portion 100 is inclined in two directions (along the length direction and width direction of the positioning groove 110), which can further improve the positioning accuracy of the pole piece. No matter where the pole piece is initially located on the receiving end surface 112, the pole piece can eventually slide to the same position, thereby facilitating improving the accuracy of the pole piece stacking.

[0051] In some embodiments, along the first horizontal direction X, the angle α between the receiving end surface 112 and the horizontal plane satisfies: 10°≤α≤20°. By way of example, the value of α can be 10°, 12°, 15°, 18°, 20°, etc., and along the second horizontal direction Y, the angle β between the receiving end surface 112 and the horizontal plane satisfies: 10°≤β≤20°. By way of example, the value of β can be 10°, 12°, 15°, 18°, 20°.

[0052] Specifically, in this embodiment, the inclination angle range of the receiving end surface 112 is limited. Relative to the horizontal plane, the inclination of the receiving end surface 112 along the first horizontal direction X is α, and the inclination along the second horizontal direction Y is β. The angle ranges of the inclination of the receiving end surface 112 along the first horizontal direction X and the inclination of the receiving end surface 112 along the second horizontal direction Y both satisfy 10°≤inclination≤20°. If the inclination angle of the receiving end surface 112 is set too large, for example, the inclination angle of the receiving end surface 112 is set to 30°, 40°, 50°, etc., the electrode sheet will increase the sliding The impact force during movement may easily cause damage to the pole piece and form burrs at the corners of the pole piece, which may ultimately affect the safety performance of the laminated battery (for example, it may easily lead to the risk of short circuit inside the laminated battery). If the inclination angle of the receiving end face 112 is set too small, for example, the inclination angle of the receiving end face 112 is set to 3°, 5°, 7°, etc., the gravity of the pole piece may be offset (the sliding of the pole piece on the receiving end face 112 is mainly powered by the gravity of the pole piece), making it difficult for the pole piece to slip on the receiving end face 112, thereby affecting the positioning accuracy of the pole piece.

[0053] Furthermore, the specific selected inclination angle of the receiving end surface 112 (ie, the value of α and the value of β) can be adaptively set according to the size and weight of the cut electrode piece and the initial speed at which the electrode piece slides from the conveying equipment to the positioning portion 100 .

[0054] It should be noted that α and β can take different angle values, for example, α can be 10° and β can be 20°. Similarly, α and β can also take the same angle value, for example, both α and β can be 15°.

[0055] In some embodiments, reference Figure 1 to Figure 2 A mounting groove (not shown in the figure) is provided on one side of the receiving end wall 111 close to the receiving end surface 112, and a rolling portion 115 is provided in the mounting groove. The rolling portion 115 contacts the pole piece and is used to transport the pole piece.

[0056] Specifically, in this embodiment, in order to improve the smoothness of the pole piece sliding on the receiving end surface 112 and ensure that the pole piece can slide to a predetermined position by gravity, a rolling portion 115 is provided on the contact side between the receiving end surface 112 and the pole piece, and the rolling portion 115 converts the sliding of the pole piece on the receiving end surface 112 into rolling, thereby reducing the friction of the pole piece when moving and improving the transmission efficiency of the pole piece. Furthermore, in order to improve the uniformity of the force applied to the pole piece during the transmission by the rolling portion 115, a plurality of rolling portions 115 are provided on the side of the receiving end surface 112 close to the pole piece, and the plurality of rolling portions 115 are evenly spaced to ensure the continuity and stability of the rolling portion 115 in transmitting the pole piece.

[0057] In some embodiments, for example, the rolling portion 115 may be a rolling ball, and the rolling ball is inserted into the mounting groove to achieve 360° rotation of the rolling portion 115. With such a structure, the installation, replacement and removal of the rolling portion 115 are facilitated, and the transmission efficiency of the rolling portion 115 is high.

[0058] In some embodiments, reference Figure 1 to Figure 2 A suction hole 116 is provided on one side of the receiving end wall 111 close to the receiving end surface 112 , and the suction hole 116 is connected to a suction pump (not shown in the figure) so that the suction hole 116 has a negative pressure suction state for sucking the electrode piece.

[0059] Specifically, in this embodiment, in order to prevent the pole piece from overturning, bumping, etc. during the sliding process, which affects the final positioning accuracy of the pole piece, an adsorption hole 116 is provided on the side of the receiving end surface 112 close to the pole piece, and a vacuum negative pressure is introduced into the adsorption hole 116, and the pole piece is adsorbed on the receiving end surface 112 through the adsorption hole 116. During the period from the pole piece moving to the positioning part 100 until the pole piece is clamped, the suction in the adsorption hole 116 is always open, and the adsorption hole 116 always provides adsorption force for the pole piece. In the process of the pole piece sliding on the receiving end surface 112, the adsorption force of the adsorption hole 116 is conducive to improving the stability of the pole piece when sliding, and effectively preventing the pole piece from slipping when sliding. When the pole piece slides to the predetermined position, the adsorption force of the adsorption hole 116 can be used to stably fix the pole piece at the predetermined position, waiting for the pole piece feeding robot to clamp the pole piece.

[0060] In some embodiments, in order to ensure uniform adsorption force on the pole piece, a plurality of adsorption holes 116 are provided on a side of the receiving end surface 112 close to the pole piece, and the plurality of adsorption holes 116 are evenly spaced apart.

[0061] It should be noted that the adsorption pump is a common device in the art, so the specific structure of the adsorption pump will not be described here.

[0062] In some embodiments, reference Figure 1 to Figure 2 The first side wall 113 and the second side wall 114 are provided with a protrusion 117. Along the vertical height direction of the receiving end surface 112, the protrusion 117 extends from one end of the first side wall 113 to the other end opposite to the first side wall 113, and the protrusion 117 extends from one end of the second side wall 114 to the other end opposite to the second side wall 114. The pole piece abuts against the protrusion 117.

[0063] Specifically, in this embodiment, in order to prevent the pole piece from being damaged and to reduce the friction between the pole piece and the side wall when taking the pole piece, a plurality of protrusions 117 are arranged at intervals on the first side wall 113 and the second side wall 114 to buffer the pole piece. At the same time, a plurality of protrusions 117 arranged at intervals can also ensure the positioning stability and positioning accuracy of the pole piece, and prevent the pole piece from being offset due to uneven force on a protrusion 117. When the pole piece slides to the first side wall 113 and the second side wall 114, it will directly touch the protrusion 117 instead of hitting the entire side edge on the first side wall 113 and the second side wall 114. If the protrusion 117 is not provided, and the pole piece is allowed to directly hit the first side wall 113 and the second side wall 114, the entire side edge of the pole piece will directly contact the first side wall 113 and the second side wall 114. Since the contact area between the pole piece and the first side wall 113 and the second side wall 114 is large, it will be easier for the side edge of the pole piece to rub out burrs when the pole piece is adsorbed and removed, causing the pole piece to be damaged. Therefore, by providing the protrusion 117 on the first side wall 113 and the second side wall 114, it is beneficial to provide the pole piece with sufficient and dispersed contact points, provide effective buffering for the pole piece, and prevent the pole piece from being damaged by the first side wall 113 and the second side wall 114 due to excessive kinetic energy, thereby ensuring the structure and performance of the pole piece are intact.

[0064] Furthermore, along the vertical height direction of the receiving end surface 112 , the protrusion 117 spans the entire first side wall 113 and the second side wall 114 , that is, the length of the protrusion 117 is long enough to effectively ensure that the pole piece finally abuts against the protrusion 117 , and the protrusion 117 provides buffering and support for the pole piece.

[0065] In some embodiments, reference Figure 1 to Figure 2 On the abutting side between the protrusion 117 and the pole piece, the protrusion 117 is provided with an arc-shaped side wall 118, and the arc-shaped side wall 118 abuts against the pole piece.

[0066] In some embodiments, a steel sheet layer is disposed on the arc-shaped side wall 118 at the abutting side between the arc-shaped side wall 118 and the pole piece, and the steel sheet layer abuts against the pole piece.

[0067] Specifically, in this embodiment, in order to further reduce the friction between the bump 117 and the pole piece, a steel sheet layer can be laid on the contact side of the arc-shaped side wall 118 and the pole piece. The steel sheet layer can be a thin steel sheet that is not easily deformed. Since the steel sheet is relatively smooth, the friction between the pole piece and the bump 117 can be reduced, thereby preventing burrs from forming on the side of the pole piece, effectively buffering and protecting the pole piece, reducing the damage of the bump 117 to the pole piece, and ensuring the safety performance of the pole piece after lamination. The steel sheet layer is selected from a soft steel sheet with low elasticity to prevent the pole piece from rebounding when the pole piece and the bump 117 are in contact, thereby facilitating the positioning accuracy of the pole piece.

[0068] In some embodiments, reference Figure 1 The pole piece positioning mechanism also includes a rotating motor 200, which is connected to a rotating shaft 300. The rotating shaft 300 is provided with a fixing portion, which includes a plurality of fixing brackets 400. The pole piece positioning mechanism includes a plurality of positioning portions 100, each positioning portion 100 is correspondingly arranged at each fixing bracket 400. When the rotating motor 200 is in a starting state, the plurality of positioning portions 100 perform circular motion around the rotating shaft 300.

[0069] Specifically, in this embodiment, in order to improve the transmission rate of the electrode pieces and thus improve the production efficiency of the battery, a plurality of positioning parts 100 for receiving the electrode pieces are provided. Since the cut electrode pieces are conveyed to the positioning parts 100 by a conveying mechanism, in order to ensure the orderliness of the electrode pieces during conveyance, the electrode pieces can be conveyed from the conveying mechanism to each positioning part 100 in sequence, while reducing the volume of the entire mechanism and saving the floor space of the entire mechanism, the plurality of positioning parts 100 are all connected to the same rotating shaft 300, and the plurality of positioning parts 100 make circular motion around the rotating shaft 300. As the electrode pieces are conveyed, the positioning parts 100 rotate synchronously to realize the reception of the electrode pieces. For example, assume that there are four positioning parts 100 connected to the rotating shaft 300, and the pole pieces are arranged at intervals on the conveying mechanism after being cut, and the frequency of the conveying mechanism transmitting the pole pieces is pre-adjusted to be consistent with the rotation speed of the rotating shaft 300. In this way, in the actual production process, after the first positioning part 100 takes over the pole piece, as the rotating shaft 300 rotates, the second positioning part 100 can just take over the next pole piece, and so on, to achieve continuous transportation of the pole pieces.

[0070] Furthermore, each positioning part 100 is correspondingly arranged on a fixed bracket 400 connected to the rotating shaft 300, and the fixed bracket 400 and the rotating shaft 300 do not move relative to each other, that is, during the rotation of the rotating shaft 300, the fixed bracket 400 will not shake, so that during the rotation of the rotating shaft 300, the stability of each positioning part 100 can be ensured, and the positioning part 100 can be prevented from shaking, thereby ensuring the positioning accuracy of the pole piece. For example, the positioning part 100 can be connected to the fixed bracket 400 by bolts, and this connection method can not only facilitate the installation, replacement and disassembly of the positioning part 100, but also ensure the connection stability of the positioning part 100.

[0071] Correspondingly, another embodiment of the present invention further provides a pole piece stacking device, referring to Figure 3 The pole piece stacking device includes the pole piece positioning mechanism in any of the above embodiments.

[0072] Specifically, in this embodiment, the electrode stacking device may also include an electrode transmission mechanism 500, a CCD detection camera, an electrode loading manipulator, etc. (the CCD detection camera and the electrode loading manipulator are not shown in the figure), and the electrode transmission mechanism 500 is provided with a plurality of rollers 510, the rollers 510 are used to transmit the electrode to the electrode positioning mechanism, and the CCD detection camera is used to record the receiving state of the electrode on the electrode positioning mechanism. The cut electrode is first transmitted to the electrode positioning mechanism by the electrode transmission mechanism 500, and after the electrode is accurately positioned on the electrode positioning mechanism, the electrode is clamped and transported to the stacking platform by the electrode loading manipulator, so that the electrode is stacked on the stacking platform to form a stacked battery. In the process of transmitting the electrode to the electrode positioning mechanism, it is always monitored by the CCD detection camera to ensure the receiving state of the electrode on the electrode positioning mechanism. The CCD detection camera can be connected to the alarm system. When the CCD detection camera detects that the position of the electrode is offset, it will trigger an alarm to remind the staff in time, thereby reducing production losses.

[0073] The pole piece stacking device using the pole piece positioning mechanism has a simple and efficient stacking operation mode, can ensure the accuracy of battery stacking, and improve the battery performance of stacked batteries. Thanks to the improvement of the pole piece positioning mechanism, the pole piece stacking device of this embodiment has the same technical effect as the pole piece positioning mechanism, which will not be described in detail here.

[0074] It should be noted that other contents of the pole piece positioning mechanism and the pole piece stacking device disclosed in the present invention can be found in the prior art and will not be described in detail here.

[0075] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A pole piece positioning mechanism, characterized in that: The invention comprises a positioning part, wherein the positioning part comprises: A receiving end wall, the receiving end wall having a receiving end surface for carrying a pole piece, wherein along a first horizontal direction, the vertical height of the receiving end surface gradually decreases to form a first higher side and a first lower side, and along a second horizontal direction perpendicular to the first horizontal direction, the vertical height of the receiving end surface gradually decreases to form a second higher side and a second lower side; A first side peripheral wall, the first side peripheral wall is connected to the receiving end wall, and the first side peripheral wall is arranged on the first lower side, and is used to limit the displacement of the pole piece in the first horizontal direction; A second side peripheral wall, wherein the second side peripheral wall is connected to the receiving end wall and is disposed on the second lower side, and is used to limit the displacement of the pole piece in the second horizontal direction.

2. The pole piece positioning mechanism according to claim 1, characterized in that: Along the first horizontal direction, the angle α between the receiving end surface and the horizontal plane satisfies: 10°≤α≤20°, and along the second horizontal direction, the angle β between the receiving end surface and the horizontal plane satisfies: 10°≤β≤20°.

3. The pole piece positioning mechanism according to claim 1, characterized in that: A mounting groove is arranged on one side of the receiving end wall close to the receiving end surface, a rolling portion is arranged in the mounting groove, and the rolling portion is in contact with the pole piece for conveying the pole piece.

4. The pole piece positioning mechanism according to claim 1, characterized in that: A suction hole is provided on one side of the receiving end wall close to the receiving end surface, and the suction hole is connected to an suction pump so that the suction hole has a negative pressure suction state for suctioning the pole piece.

5. The pole piece positioning mechanism according to claim 1, characterized in that: The first side peripheral wall and the second side peripheral wall are provided with a convex block, and along the vertical height direction of the receiving end surface, the convex block extends from one end of the first side peripheral wall to the other end opposite to the first side peripheral wall, and the convex block extends from one end of the second side peripheral wall to the other end opposite to the second side peripheral wall; Wherein, the pole piece abuts against the protrusion.

6. The pole piece positioning mechanism according to claim 5, characterized in that: The protrusion is provided with an arc-shaped side wall on the abutting side of the protrusion and the pole piece, and the arc-shaped side wall abuts against the pole piece.

7. The pole piece positioning mechanism according to claim 6, characterized in that: A steel sheet layer is provided on the arc-shaped side wall at the abutting side of the arc-shaped side wall and the pole piece, and the steel sheet layer abuts against the pole piece.

8. The pole piece positioning mechanism according to any one of claims 1 to 7, characterized in that: It also includes a rotating motor, the rotating motor is connected to a rotating shaft, the rotating shaft is provided with a fixing part, and the fixing part includes a plurality of fixing brackets; Wherein, the pole piece positioning mechanism includes a plurality of positioning parts, each of which is correspondingly arranged on each of the fixing brackets, and when the rotating motor is in a starting state, the plurality of positioning parts perform circular motion around the rotating axis.

9. A pole piece stacking device, characterized in that: It comprises the pole piece positioning mechanism as described in any one of claims 1 to 8.

10. The pole piece stacking device according to claim 9, characterized in that: Also includes: A pole piece transmission mechanism, wherein the pole piece transmission mechanism is provided with a plurality of rollers, and the rollers are used to transmit the pole piece to the pole piece positioning mechanism; A CCD detection camera is used to record the receiving state of the pole piece on the pole piece positioning mechanism.

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