Battery cell stacking method and device

Abstract

The present invention discloses a battery cell stacking method and equipment thereof, the battery cell stacking method comprises the following steps: conveying an unstacked discharged battery cell unit from a high end to an inclined material collecting plate, the material collecting plate is used to support the stacked discharged battery cell unit; continuing to convey the unstacked discharged battery cell unit, so that the node connecting the first discharged battery cell unit to be stacked and the second discharged battery cell unit to be stacked moves upward; applying force twice to the node, pushing the node to approach the lower side of the stacked discharged battery cell unit, and completing the stacking to become a stacked discharged battery cell unit; the two unstacked discharged battery cell units connected to the second discharged battery cell unit to be stacked become a new group of discharged battery cell units to be stacked, repeating the above steps until a complete battery cell is stacked. Through the battery cell stacking method of the present invention, composite monomer pole pieces can be conveniently and quickly stacked, thereby improving the efficiency of battery cell stacking and ensuring the quality of battery cell forming.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a battery core stacking method and equipment thereof. Background Art

[0002] With the development of science and technology, lithium batteries have gradually played an important role in daily life due to their own advantages such as high storage energy density and low self-discharge rate. In the manufacturing process of lithium batteries, it is necessary to stack the positive and negative electrodes of lithium battery cells. At present, the commonly used stacking methods include swing stacking method and stacking stacking method; the swing stacking method has weak control over the cells during the stacking process, so that it cannot effectively constrain the movement trajectory and path of the cells, and it is easy to have uncontrollable random stacking paths, affecting the quality of cell forming; the stacking stacking method requires the positive and negative electrodes of the cells to be cut into small pieces first, and then stacked through an isolation membrane to form a small cell monomer, and then the small cell monomers are stacked in parallel to form a large cell. The stacking process has many steps, which makes the cell stacking efficiency low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a battery core stacking method, which can efficiently stack battery cores while ensuring the quality of the battery core after forming.

[0004] The present invention also provides a battery core stacking device.

[0005] In a first aspect, an embodiment of the present invention provides a battery cell stacking method, comprising the following steps:

[0006] The unstacked discharge core units are conveyed from the higher end to the inclined collecting plate; wherein the collecting plate is used to support the stacked discharge core units; the unstacked discharge core units continue to be conveyed, and under the push of the conveyed unstacked discharge core units, the nodes connecting the first discharge core unit to be stacked and the second discharge core unit to be stacked in the discharge core unit to be stacked automatically move upward, and a suspended angle is formed between the first discharge core unit to be stacked and the second discharge core unit to be stacked; a first force is applied to the node to push the node to approach the lower end of the collecting plate; a second force is applied to the node to push the discharge core unit to be stacked close to the upper surface of the stacked discharge core unit, so that the discharge core unit to be stacked is stacked on the stacked discharge core unit to become a new stacked discharge core unit; two consecutive unstacked discharge core units connected to the second discharge core unit to be stacked become a new group of discharge core units to be stacked; the above steps are repeated until a complete battery cell is stacked.

[0007] The battery cell stacking method of the embodiment of the present invention has at least the following beneficial effects: the present invention adopts a battery cell stacking method, compared with the prior art, the unstacked battery cell units are transported to an inclined aggregate plate, and the aggregate plate is used to support the stacked battery cell units; at this time, the unstacked battery cell units that continue to be transported can generate thrust on the second battery cell units to be stacked, so that the node connecting the first battery cell unit to be stacked and the second battery cell unit to be stacked moves upward, and a suspended angle is formed between the first battery cell unit to be stacked and the second battery cell unit to be stacked; applying a first force to the node can make the node approach the lower side of the stacked battery cell unit, and then applying a second force to the node can push the node close to the upper surface of the aggregate plate, and as the angle between the first battery cell unit to be stacked and the second battery cell to be stacked decreases, the first battery cell unit to be stacked and the second battery cell to be stacked are stacked on the stacked battery cell units, thereby completing the stacking to become new stacked battery cell units. At the same time, two consecutive unstacked discharged core units connected to the second to-be-stacked discharged core unit become a new group of to-be-stacked discharged core units, and the above steps are repeated until a complete battery cell is stacked. By adopting the battery cell stacking method, unstacked discharged core units can be continuously transported, and the stacking of the battery cells can be quickly completed by repeatedly applying the first force and the second force to the first node, thereby improving the efficiency of battery cell stacking, and under the condition of applying the force twice to the node, the motion trajectory of the composite monomer pole piece is restricted, so that the motion trajectory of the composite monomer pole piece is relatively stable, reducing the occurrence of random motion trajectories, and ensuring the quality of the battery cell after forming.

[0008] According to some embodiments of the battery cell stacking method of the present invention, the following steps are also included before "transporting the unstacked battery cell units to the inclined collecting plate": the collecting plate is horizontally arranged in an initial state, the first battery cell unit of the composite monomer electrode sheet is horizontally transported to the end of the collecting plate, the first battery cell unit is adsorbed and fixed on the stacking mechanism, and becomes the first stacked battery cell unit; the collecting plate rotates and tilts downward around the rotation center, driving the stacked battery cell units and the first battery cell unit to be stacked to swing downward; wherein, the first battery cell unit to be stacked is connected to the upper side of the stacked battery cell unit.

[0009] According to some embodiments of the battery cell stacking method of the present invention, "applying a first force to the node to push the node toward the lower side of the stacked discharge cell unit" also includes the following steps: spraying gas toward one side of the opening of the angle formed between the first discharge cell unit to be stacked and the second discharge cell unit to be stacked and acting on the discharge cell unit to be stacked, so that the discharge cell unit to be stacked remains in a stretched state.

[0010] According to some embodiments of the battery cell stacking method of the present invention, "applying a first force to the node to push the node toward the lower end of the aggregate plate; applying a second force to the node to push the to-be-stacked discharge core unit toward the upper surface of the stacked discharge core unit, so that the to-be-stacked discharge core unit is stacked on the stacked discharge core unit to become a new stacked discharge core unit" also includes the following steps: applying a first thrust and a second thrust to the node in a swinging manner, driving the node to rotate and approach the lower side of the stacked discharge core unit with the upper side of the stacked discharge core unit as the rotation center.

[0011] In the second aspect, an embodiment of the present invention provides a battery cell stacking device, comprising: a stacking mechanism, the stacking mechanism comprising a collecting plate, the collecting plate being arranged at an angle; the collecting plate being used to support the stacked discharged battery cell units; a feeding mechanism, the feeding mechanism being arranged on a side close to the rotation center of the collecting plate, and one end of the collecting plate close to the feeding mechanism is higher than the other end of the collecting plate, the feeding mechanism being used to horizontally feed unstacked discharged battery cell units to the collecting plate; a guiding mechanism, the guiding mechanism comprising a first guiding mechanism and a second guiding mechanism, the first guiding mechanism being rotatably arranged above the collecting plate, the second guiding mechanism being rotatably arranged on a side of the stacking mechanism away from the feeding mechanism, the first guiding mechanism being used to push the discharged battery cell units to be stacked toward the lower end of the collecting plate, and the second guiding mechanism being used to push the discharged battery cell units to be stacked close to the upper surface of the stacked discharged battery cell units, and stacked on the stacked discharged battery cell units.

[0012] The battery cell stacking device of the embodiment of the present invention has at least the following beneficial effects: the present invention adopts a battery cell stacking device. Compared with the prior art, the collecting plate is tilted, and the feeding mechanism horizontally feeds out the unstacked discharged core unit from the side close to the rotation center of the collecting plate, and the unstacked discharged core unit is conveyed to the inclined collecting plate, so that the discharged core unit to be stacked is at an angle convenient for stacking. A first guide mechanism is arranged above the stacking mechanism, and a second guide mechanism is arranged on the side of the stacking mechanism away from the feeding mechanism, respectively applying the first and second forces to the discharged core unit to be stacked during the stacking process, so that the node connecting the two discharged core units to be stacked approaches the lower side of the stacked discharged core unit and falls onto the collecting plate. By adopting the battery cell stacking device, the battery cells can be stacked conveniently and quickly, thereby improving the efficiency of battery cell stacking; at the same time, the composite monomer pole piece is located on the stacking mechanism, and the motion path of the stacking process thereof is less random motion trajectory generated under the action of the guide mechanism, thereby ensuring the quality of battery cell forming.

[0013] According to other embodiments of the battery cell stacking equipment of the present invention, the stacking mechanism further includes a first driving device, and the first driving device is used to drive the collecting plate to rotate and switch between a horizontal state and an inclined state.

[0014] According to other embodiments of the battery cell stacking equipment of the present invention, when the collecting plate is in a horizontal state, the position where the unstacked battery cell units are conveyed by the feeding mechanism is flush with the upper surface of the collecting plate.

[0015] According to some other embodiments of the present invention, the battery cell stacking equipment further includes a frame, and the first driving device includes a cylinder, one end of the cylinder is rotatably mounted on the frame, and the other end of the cylinder is rotatably connected to the bottom of the collecting plate.

[0016] According to some other embodiments of the present invention, the battery cell stacking equipment further includes a stretching mechanism, which is obliquely arranged on the frame and located below the rotation center of the collecting plate, and is used to spray gas in the direction of the collecting plate.

[0017] According to other embodiments of the battery cell stacking equipment of the present invention, a baffle is provided on a side of the collecting plate away from the feeding mechanism, and the baffle is used to limit the stacked battery cell units on the collecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the battery cell stacking device during initial stacking according to an embodiment of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the battery cell stacking equipment during the stacking process according to an embodiment of the present invention.

[0020] Reference numerals:

[0021] Composite monomer pole piece 100 , lamination mechanism 110 , collecting plate 111 , first driving device 112 , baffle 113 , feeding mechanism 120 , first guiding mechanism 131 , second guiding mechanism 132 , frame 140 , stretching mechanism 150 , node 160 . DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments to clearly and completely describe the concept of the present invention and the technical effects produced, so as to fully understand the purpose, characteristics and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, if orientation descriptions are involved, the orientations or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, etc. are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0024] In the description of the embodiments of the present invention, if a feature is referred to as being "set", "fixed", "connected", or "installed" on another feature, it may be directly set, fixed, or connected to the other feature, or it may be indirectly set, fixed, connected, or installed on the other feature. In the description of the embodiments of the present invention, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than", or "exceeds" is involved, it should be understood as not including the number itself, and if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] Reference below Figure 1 and Figure 2 A battery cell stacking method and device according to an embodiment of the present invention are described.

[0026] like Figure 1 and Figure 2 As shown, according to the first aspect of the present invention, the method for stacking battery cells includes the following steps: transporting the unstacked battery cell units from the higher end to the inclined collecting plate 111; wherein the end of the collecting plate 111 close to the unstacked battery cell units is higher than the other end of the collecting plate 111, and the collecting plate 111 is used to support the stacked battery cell units; continuing to send out the unstacked battery cell units, under the push of the sent out unstacked battery cell units, the node 160 connecting the first battery cell to be stacked and the second battery cell to be stacked in the battery cell to be stacked automatically moves upward, and the first battery cell to be stacked is moved upward. A suspended angle is formed between the battery cell unit and the second battery cell unit to be stacked; a first force is applied to the node 160 to push the node 160 toward the lower end of the aggregate plate 111; a second force is applied to the node 160 to push the battery cell unit to be stacked toward the upper surface of the stacked battery cell unit, so that the battery cell unit to be stacked is stacked on the stacked battery cell unit to become a new stacked battery cell unit; two consecutive unstacked battery cell units connected to the second battery cell unit to be stacked become a new group of battery cell units to be stacked; the above steps are repeated until a complete battery cell is stacked.

[0027] Specifically, the composite monomer pole piece 100 is composed of a plurality of battery cell units, and each battery cell unit includes a positive pole piece and a negative pole piece. The composite monomer pole piece 100 includes two separators, the negative pole piece is arranged between the two separators, the positive pole piece is alternately attached to the outside of the negative pole piece, and the negative pole piece and the positive pole piece are separated by the separator; the material of the positive pole piece and the negative pole piece is relatively hard, while the material of the separator is relatively soft, and there is a certain gap between the positive pole piece and the negative pole piece between each battery cell unit, and the gap constitutes a node 160 connecting the two battery cell units. The composite monomer pole piece 100 can be divided into an unstacked discharge cell unit, a discharge cell unit to be stacked, and a stacked discharge cell unit during the stacking process. The unstacked discharge cell unit is sent out in the horizontal direction by the feeding mechanism 120, the stacking mechanism 110 supports the stacked discharge cell unit, and the discharge cell unit to be stacked falls and completes the stacking under the push of the guide mechanism.

[0028] The first battery cell unit is fixed on the stacking mechanism 110 and becomes a stacked battery cell unit. The collecting plate 111 is tilted, and one end of the collecting plate 111 close to the unstacked battery cell unit is higher than the other end of the collecting plate 111, so that the stacked battery cell unit and the first battery cell unit to be stacked on the collecting plate 111 are tilted downward. At this time, the feeding mechanism 120 continuously feeds out the unstacked battery cell unit, and the unstacked battery cell unit pushes the second battery cell unit to be stacked to move forward, so that the node 160 connecting the first battery cell unit to be stacked and the second battery cell unit to be stacked moves upward under the action of the two battery cells to be stacked, and a suspended angle is formed between the first battery cell unit to be stacked and the second battery cell unit to be stacked; when the node 160 moves upward to a certain height, it moves upward. The first guide mechanism 131 of the complex swinging motion acts on the node 160, exerting an oblique downward force on the node 160, so that the node 160 approaches the lower side of the stacked discharge core unit; the second guide mechanism 132 of the reciprocating swinging motion acts on the node 160 again, pushing the discharge core unit to be stacked close to the upper surface of the aggregate plate 111, and stacking it on the stacked discharge core unit to complete the stacking, thus becoming a new stacked discharge core unit; the two unstacked discharge core units connected to the discharge core unit to be stacked become a new group of discharge core units to be stacked, and the above steps are repeated until a complete battery cell is stacked. The stacking process can stack the battery cell units continuously, and under the action of the guide mechanism, the battery cell units can complete the stacking action relatively quickly, thereby improving the efficiency of battery cell stacking.

[0029] In some embodiments of the present invention, before "transporting the unstacked cell units to the inclined collecting plate 111", the following steps are also included: the collecting plate 111 is horizontally arranged in the initial state, the first cell unit of the composite monomer pole piece 100 is horizontally transported to the end of the collecting plate 111, and the first cell unit is adsorbed and fixed on the stacking mechanism 110 to become the first stacked cell unit; the collecting plate 111 rotates and tilts downward around the rotation center, driving the stacked cell units and the first to-be-stacked cell units to swing downward; wherein the first to-be-stacked cell unit is connected to the upper side of the stacked cell units. For example, Figure 1 and Figure 2 As shown, the collecting plate 111 is in a horizontal state in the initial state, the first battery cell unit is transported to the end of the stacking mechanism 110, and is adsorbed and fixed on the stacking mechanism 110 to become the first stacked discharged battery cell unit; the collecting plate 111 rotates downward around the rotation center and is tilted, so that the stacked discharged battery cell unit and the first to-be-stacked discharged battery cell unit on the collecting plate 111 are also tilted, and the first to-be-stacked discharged battery cell unit is connected to the upper side of the stacked discharged battery cell unit. Specifically, when the first battery cell unit on the composite monomer pole piece 100 is sent out in the horizontal direction and is sent to the end of the collecting plate 111, the collecting plate 111 fixes the first battery cell unit by adsorption, so that the first battery cell unit becomes the first stacked discharged battery cell unit, so that the subsequent to-be-stacked discharged battery cell units are finally stacked on top of the stacked discharged battery cell unit to become a new stacked discharged battery cell unit. It can be understood that the battery cell unit can also be fixed on the stacking mechanism 110 by clamping, pressing, etc. In this embodiment, the method of fixing the battery cell unit by adsorption is not a specific limitation of the present invention.

[0030] In some embodiments of the present invention, "applying a first force to the node 160 to push the node 160 toward the lower side of the stacked discharge core unit" further includes the following steps: spraying gas toward the opening side of the angle formed between the first discharge core unit to be stacked and the second discharge core unit to be stacked and acting on the discharge core unit to be stacked, so that the discharge core unit to be stacked remains in a stretched state. Figure 2As shown, at the position where the first force is applied to the node 160, gas is ejected from one side of the opening of the angle formed between the first discharge core unit to be stacked and the second discharge core unit to be stacked, and a force is applied to the discharge core unit to be stacked. Specifically, since the feeding mechanism 120 continuously feeds out unstacked core units, the unstacked core units can push the second core unit to be stacked to move forward. At this time, the first core unit to be stacked is already in a downward tilted state under the action of the stacking mechanism 110. Therefore, the first core unit to be stacked and the second core unit to be stacked can interact with each other to make the node 160 connecting the two core units to be stacked move upward. In this process, the first core unit to be stacked and the second core unit to be stacked may bend under the action of their gravity or other external forces. Therefore, a stretching mechanism 150 is set on one side of the angle opening of the two core units to be stacked, and the stretching mechanism 150 is a gas ejecting mechanism. The stretching mechanism 150 ejects gas and acts on the first core unit to be stacked and the second core unit to be stacked, so that the first core unit to be stacked and the second core unit to be stacked can maintain a stretched state to complete the stacking.

[0031] In some embodiments of the present invention, "applying a first force to the node 160 to push the node 160 toward the lower end of the collecting plate 111; applying a second force to the node 160 to push the to-be-stacked discharge core unit toward the upper surface of the stacked discharge core unit, so that the to-be-stacked discharge core unit is stacked on the stacked discharge core unit to become a new stacked discharge core unit" also includes the following steps: applying a first thrust and a second thrust to the node 160 in a swinging manner, driving the node 160 to rotate and approach the lower side of the stacked discharge core unit with the upper side of the stacked discharge core unit as the rotation center. For example, Figure 1 and Figure 2As shown, the first thrust and the second thrust are applied to the node 160 in a swinging manner, thereby driving the node 160 to rotate and approach the lower side of the stacked discharge core unit with the upper side of the stacked discharge core unit as the rotation center. Specifically, a first guide mechanism 131 is provided above the material collecting plate 111, and a second guide mechanism 132 is provided on one side of the material collecting plate 111. The first guide mechanism 131 includes a first swing rod and a first rotating shaft, and the second guide mechanism 132 includes a second swing rod and a second rotating shaft. By driving the first swing rod to swing back and forth with the first rotating shaft as the rotation center, the first guide mechanism 131 regularly pushes the node 160 connecting the two discharge core units to be stacked, so that the node 160 rotates and approaches the lower side of the stacked discharge core unit with the upper side of the stacked discharge core unit as the rotation center; at the same time, the second swing rod cooperates with the second pushing action of the node 160 to push the discharge core unit to be stacked to fall and complete the lamination action, becoming a stacked discharge core unit, and the two unstacked discharge core units connected to the second discharge core unit to be stacked become a new group of discharge core units to be stacked. It can be understood that other devices that can regularly push the node 160 to move can also be used. The use of the swing rod and the rotating shaft in this embodiment is not a specific limitation of the present invention.

[0032] like Figure 1 and Figure 2 As shown, the battery cell stacking equipment according to the second embodiment of the present invention includes: a stacking mechanism 110, a feeding mechanism 120 and a guiding mechanism.

[0033] The stacking mechanism 110 includes a collecting plate 111, which is tilted; the collecting plate 111 is used to support the stacked discharge core units; the feeding mechanism 120 is arranged on a side close to the rotation center of the collecting plate 111, and the end of the collecting plate 111 close to the feeding mechanism 120 is higher than the other end of the collecting plate 111, and the feeding mechanism 120 is used to send unstacked discharge core units to the collecting plate 111; the guiding mechanism includes a first guiding mechanism 131 and a second guiding mechanism 132, the first guiding mechanism 131 is rotatably arranged above the collecting plate 111, and the second guiding mechanism 132 is rotatably arranged on a side of the stacking mechanism 110 away from the feeding mechanism 120, the first guiding mechanism 131 is used to push the discharge core units to be stacked to move to the lower end of the collecting plate 111, and the second guiding mechanism 132 is used to push the discharge core units to be stacked close to the upper surface of the stacked discharge core units and stack them on the stacked discharge core units.

[0034] Specifically, the stacked discharge core unit in the stacking process can be supported on the inclined collecting plate 111; the feeding mechanism 120 continuously feeds out the unstacked discharge core unit and conveys the unstacked discharge core unit to the collecting plate 111, and the unstacked discharge core unit can push the second discharge core unit to be stacked to move in the horizontal direction, so that the node 160 connecting the first discharge core unit to be stacked and the second discharge core unit to be stacked moves upward, and the first discharge core unit to be stacked and the second discharge core unit to be stacked form a suspended angle on the side close to the collecting plate 111. The first guide mechanism 131 acts on the node 160, which can make the node 160 move toward the lower side close to the stacked discharge core unit; the second guide mechanism 132 acts on the node 160 again, and can also make the discharge core unit to be stacked close to the upper surface of the collecting plate 111, and stack it on the stacked discharge core unit to complete the stacking action, becoming a new stacked discharge core unit, and the two unstacked discharge core units connected to the second discharge core unit to be stacked become a new group of discharge core units to be stacked.

[0035] In some embodiments of the present invention, the stacking mechanism 110 further includes a first driving device 112, and the first driving device 112 is used to drive the collecting plate 111 to rotate and switch between a horizontal state and an inclined state. Figure 1 and Figure 2 As shown, the first driving device 112 is used to drive the material collecting plate 111 to rotate and switch between a horizontal state and an inclined state. Specifically, the first driving device 112 can drive the material collecting plate 111 to rotate around the rotation center. After the first battery cell unit is fixed on the material collecting plate 111, the first driving device 112 drives the material collecting plate 111 to rotate downward, so that the material collecting plate 111 switches from a horizontal state to a rotating state, and drives the stacked battery cell unit and the first battery cell unit to be stacked on the material collecting plate 111 to move downward. Under the push of the unstacked battery cell unit sent by the feeding mechanism 120, a suspended angle can be formed between the second battery cell unit to be stacked and the first battery cell unit to be stacked.

[0036] In some embodiments of the present invention, when the collecting plate 111 is in a horizontal state, the position where the unstacked discharge core units are conveyed by the feeding mechanism 120 is flush with the upper surface of the collecting plate 111. Figure 1As shown, when the collecting plate 111 is in a horizontal state, the position where the feeding mechanism 120 conveys the unstacked cell units is flush with the upper surface of the collecting plate 111. Specifically, before starting the cell stacking action, the collecting plate 111 is in a horizontal position, the feeding mechanism 120 is arranged on a side close to the rotation center of the collecting plate 111, and the position where the feeding mechanism 120 conveys the unstacked cell units is flush with the upper surface of the collecting plate 111, so that the unstacked cell units conveyed by the feeding mechanism 120 can be smoothly conveyed to the collecting plate 111, wherein when the first cell unit on the composite monomer pole piece 100 is conveyed to the end of the collecting plate 111, the first cell unit is fixed by adsorption, making it the first stacked cell unit.

[0037] In some embodiments of the present invention, a frame 140 is further included, and the first driving device 112 includes a cylinder, one end of the cylinder is rotatably mounted on the frame 140, and the other end of the cylinder is rotatably connected to the bottom of the collecting plate 111. For example, Figure 1 and Figure 2 As shown, the first driving device 112 includes a cylinder, one end of which is rotatably mounted on the frame 140, and the other end of which is rotatably connected to the bottom of the collecting plate 111. Specifically, the first cylinder device includes a cylinder, and one end of the cylinder is rotatably mounted on the frame 140, and the other end of the cylinder is rotatably connected to the bottom of the collecting plate 111; through the extension and contraction of the cylinder and the relative rotation between the cylinder and the collecting plate 111, the collecting plate 111 is driven to rotate upward or downward around the rotation center, so that the collecting plate 111 is in a horizontal state both in the initial state of the battery cell stacking and after the completion of the stacking, and at the same time, the collecting plate 111 can also be in a downward tilted state during the stacking process, so as to facilitate the stacking of the battery cell units on the collecting plate 111.

[0038] In some embodiments of the present invention, a stretching mechanism 150 is further included. The stretching mechanism 150 is obliquely disposed on the frame 140 and is located below the rotation center of the collecting plate 111. The stretching mechanism 150 is used to spray gas toward the collecting plate 111. For example, Figure 2As shown, the stretching mechanism 150 is arranged on the frame 140 and is located below the rotation center of the material collecting plate 111. Specifically, after the material collecting plate 111 drives the first stacked discharge core unit and the first to-be-stacked discharge core unit to swing downward, the feeding mechanism 120 continues to feed out the unstacked discharge core unit in the horizontal direction, so that the node 160 connecting the two to-be-stacked discharge core units moves upward under the interaction of the two to-be-stacked discharge core units, so that the two to-be-stacked discharge core units form a suspended angle on one side close to the material collecting plate 111, so that the subsequent first guide mechanism 131 and the second guide mechanism 132 act on the node 160 to push the node 160 to approach the lower side of the stacked discharge core unit. During the stacking process, the battery cell units to be stacked may be bent due to the action of gravity or external force. A stretching mechanism 150 is provided on one side of the angle opening, and the stretching mechanism 150 is a gas ejection mechanism, which ejects gas at the position where the first force is applied to the node 160, so that the battery cell units to be stacked can be kept in a stretched state, thereby reducing the stacking problem caused by the folding of the battery cell units and improving the quality of battery cell forming.

[0039] In some embodiments of the present invention, a baffle 113 is provided on one side of the material collecting plate 111 away from the feeding mechanism 120, and the baffle 113 is used to limit the stacked discharge core units on the material collecting plate 111. Figure 1 and Figure 2 As shown, a baffle 113 is provided on the side of the collecting plate 111 away from the feeding mechanism 120. Specifically, the feeding mechanism 120 continuously feeds the unstacked battery cell units horizontally to the collecting plate 111 in the stacking mechanism 110. In the initial state, by providing a baffle 113 on the side of the collecting plate 111 away from the feeding mechanism 120, that is, at the end of the collecting plate 111, it is possible to prevent the first battery cell unit from falling from the end of the collecting plate 111 before being adsorbed and fixed. During the stacking process, the baffle 113 can also limit the stacked battery cell units on the collecting plate 111, and since the collecting plate 111 is in an inclined state during stacking, the stacked battery cell units can also slide toward the baffle 113 under the action of gravity, so that the baffle 113 can also have the function of aligning the stacked battery cell units.

[0040] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. A method for stacking battery cells, It is characterized in that The following steps are involved: The unstacked core units are transported from the higher end to the inclined collecting plate; wherein the collecting plate is used to support the stacked core units; Continue to send out the unstacked discharge core unit, and under the push of the sent out unstacked discharge core unit, the node connecting the first discharge core unit to be stacked and the second discharge core unit to be stacked in the discharge core unit to be stacked automatically moves upward, and a suspended angle is formed between the first discharge core unit to be stacked and the second discharge core unit to be stacked; Apply a first force to the node to push the node toward the lower end of the aggregate plate; Apply a second force to the node to push the to-be-stacked discharge core unit close to the upper surface of the stacked discharge core unit, so that the to-be-stacked discharge core unit is stacked on the stacked discharge core unit to form a new stacked discharge core unit; the two consecutive unstacked discharge core units connected to the second to-be-stacked discharge core unit form a new group of to-be-stacked discharge core units; Repeat the above steps until a complete battery cell is stacked; Wherein, before "transporting the unstacked discharge core units from the higher end to the inclined collecting plate", the following steps are also included: The collecting plate is initially arranged horizontally, and the first cell unit of the composite monomer pole piece is horizontally transported to the end of the collecting plate. The first cell unit is adsorbed and fixed on the stacking mechanism, becoming the first stacked cell unit. The collecting plate rotates and tilts downward around the rotation center, driving the stacked discharge core unit and the first discharge core unit to be stacked to swing downward; wherein the first discharge core unit to be stacked is connected to the upper side of the stacked discharge core unit.

2. The battery cell stacking method according to claim 1, It is characterized in that "Applying a first force to the node to push the node toward the lower end of the aggregate plate" also includes the following steps: Gas is sprayed toward one side of the opening of the angle formed between the first discharge core unit to be stacked and the second discharge core unit to be stacked, and acts on the discharge core unit to be stacked, so that the discharge core unit to be stacked remains in a stretched state.

3. The battery cell stacking method according to claim 1, It is characterized in that "Applying a first force to the node to push the node toward the lower end of the aggregate plate; applying a second force to the node to push the to-be-stacked discharge core unit toward the upper surface of the stacked discharge core unit, so that the to-be-stacked discharge core unit is stacked on the stacked discharge core unit to form a new stacked discharge core unit" also includes the following steps: The first thrust and the second thrust are applied to the node in a swinging manner, so that the node is driven to rotate and approach the lower side of the stacked discharge core unit with the upper side of the stacked discharge core unit as the rotation center.

4. A battery cell stacking device, It is characterized in that include: The lamination mechanism comprises a collecting plate, the collecting plate is arranged obliquely; the collecting plate is used to support the stacked discharge core units; A feeding mechanism, the feeding mechanism is arranged on one side close to the rotation center of the collecting plate, and one end of the collecting plate close to the feeding mechanism is higher than the other end of the collecting plate, and the feeding mechanism is used to horizontally feed unstacked discharge core units to the collecting plate; A guide mechanism, the guide mechanism includes a first guide mechanism and a second guide mechanism, the first guide mechanism is rotatably arranged above the material collecting plate, the second guide mechanism is rotatably arranged on a side of the laminating mechanism away from the feeding mechanism, the first guide mechanism is used to push the discharge core unit to be stacked to move to the lower end of the material collecting plate, and the second guide mechanism is used to push the discharge core unit to be stacked close to the upper surface of the already stacked discharge core unit and stack it on the already stacked discharge core unit; in, The stacking mechanism also includes a first driving device, which is used to drive the collecting plate to rotate and switch between a horizontal state and an inclined state; a baffle is provided on the side of the collecting plate away from the feeding mechanism, and the baffle is used to limit the stacked discharge core units on the collecting plate.

5. The battery cell stacking device according to claim 4, It is characterized in that When the material collecting plate is in a horizontal state, the position where the unstacked discharge core units are conveyed by the feeding mechanism is flush with the upper surface of the material collecting plate.

6. The battery cell stacking device according to claim 4, It is characterized in that It also includes a frame, and the first driving device includes a cylinder, one end of the cylinder is rotatably mounted on the frame, and the other end of the cylinder is rotatably connected to the bottom of the collecting plate.

7. The battery cell stacking device according to claim 6, It is characterized in that It also includes a stretching mechanism, which is obliquely arranged on the frame and located below the rotation center of the collecting plate. The stretching mechanism is used to spray gas in the direction of the collecting plate.

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