Blow-fold forming device

Abstract

The present invention discloses a blow-stack forming device, which relates to the technical field of lithium batteries. The blow-stack forming device includes a frame, a first blowing mechanism, a second blowing mechanism and an insert plate. The insert plate is arranged below the first baffle plate and the second baffle plate, and the first baffle plate, the insert plate and the second baffle plate together form a stacking cavity, the first blowing mechanism is installed on the first baffle plate, and the second blowing mechanism is installed on the second baffle plate, and the first blowing mechanism and the second blowing mechanism are used to start alternately so that the electrode material strips are stacked on the insert plate and form a battery cell. Compared with the prior art, the blow-stack forming device provided by the present invention adopts a first blowing mechanism installed on the first baffle plate and a second blowing mechanism installed on the second baffle plate, so that the battery cell can be quickly stacked by blowing, the stacking efficiency is high, the stacking process is stable and reliable, time cost is saved, and the production cycle of lithium batteries is effectively shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a blow-folding molding device. Background Art

[0002] At present, the main production equipment for lithium-ion battery cells are winding machines and stacking machines. Among them, the stacking processes of stacking machines mainly include free stacking and "Z"-shaped stacking. Traditional free stacking mainly uses a robot to stack single pole pieces. This stacking method is inefficient and cannot achieve high-speed stacking. The "Z"-shaped stacking machine has a large mass and requires a high-power motor when moving left and right. In addition, the machine body shakes greatly when moving quickly, resulting in limited stacking speed and unstable stacking, which seriously affects the production cycle of lithium batteries.

[0003] In view of this, it is particularly important to design and manufacture a blow-stack forming device with a fast stacking speed, especially in battery cell production. Summary of the invention

[0004] The purpose of the present invention is to provide a blow-stack forming device that can achieve rapid stacking of battery cells, has high stacking efficiency, a stable and reliable stacking process, saves time and cost, and effectively shortens the production cycle of lithium batteries.

[0005] The present invention is achieved by adopting the following technical solutions.

[0006] A blow stacking forming device comprises a frame, a first blowing mechanism, a second blowing mechanism and an insert plate, wherein the frame comprises a first baffle plate and a second baffle plate which are arranged in parallel and at intervals, the insert plate is arranged below the first baffle plate and the second baffle plate, the first baffle plate, the insert plate and the second baffle plate together form a stacking cavity, the first blowing mechanism is mounted on the first baffle plate, the second blowing mechanism is mounted on the second baffle plate, the first blowing mechanism is used to blow out an airflow in the direction of the second baffle plate when a pole piece strip falls into the stacking cavity, the second blowing mechanism is used to blow out an airflow in the direction of the first baffle plate when a pole piece strip falls into the stacking cavity, the first blowing mechanism and the second blowing mechanism are used to be started alternately so that the pole piece strip is stacked on the insert plate and a battery cell is formed.

[0007] Furthermore, the first blowing mechanism includes an air pump, an air blowing pipe and a nozzle. One end of the air blowing pipe is connected to the air pump, and the other end is connected to the nozzle. The nozzle is installed on the top of the first baffle.

[0008] Furthermore, the blowing pipe includes a main pipe and multiple branch pipes, and the number of nozzles is multiple. One end of the main pipe is connected to the air pump, and the other end is respectively connected to multiple branch pipes. Each branch pipe is connected to a nozzle, and the multiple nozzles are arranged in parallel and at intervals.

[0009] Furthermore, the blow-folding molding device also includes a first driving member and a lifting mechanism, the first driving member is connected to the plug plate, the lifting mechanism is arranged below the plug plate, the first driving member can drive the plug plate to move in a first direction so that the battery cell falls on the lifting mechanism, and the lifting mechanism can drive the battery cell to move in a second direction away from the frame to facilitate unloading of the battery cell, and the first direction is arranged perpendicular to the second direction.

[0010] Furthermore, the lifting mechanism includes a second driving member and a supporting plate, the second driving member is connected to the supporting plate, the second driving member can drive the supporting plate to move in a second direction, and the supporting plate is used to carry the battery cell.

[0011] Furthermore, the plug board is provided with a clearance groove, and the support plate is provided with a support portion, the position of the clearance groove corresponds to the position of the support portion, the support portion can extend into or retract from the clearance groove, and the support portion is used to carry the battery cell.

[0012] Furthermore, there are multiple yielding slots and supporting parts, and multiple yielding slots are arranged on the plug board in parallel and at intervals, and each supporting part cooperates with one yielding slot.

[0013] Furthermore, the frame also includes a first side plate and a second side plate, the first side plate and the second side plate are arranged opposite to each other, the stacking cavity is arranged between the first side plate and the second side plate, and the first side plate, the first baffle plate, the second side plate and the second baffle plate are connected end to end.

[0014] Furthermore, the blow-forming device also includes a driving roller, which is arranged above the frame. The driving roller includes an active roller and a driven roller arranged in parallel and spaced apart. The pole piece strip is clamped between the active roller and the driven roller. The active roller is used to control the falling speed of the pole piece strip.

[0015] Furthermore, the blow-folding molding device also includes a cutter mechanism, which is arranged above the frame and is used to cut off the pole piece strip.

[0016] The blow-folding molding device provided by the present invention has the following beneficial effects:

[0017] The blow stacking molding device provided by the present invention comprises a frame including a first baffle and a second baffle arranged in parallel and at intervals, a plug plate is arranged below the first baffle and the second baffle, the first baffle, the plug plate and the second baffle together enclose a stacking cavity, a first blowing mechanism is installed on the first baffle, and a second blowing mechanism is installed on the second baffle, the first blowing mechanism is used to blow out an airflow in the direction of the second baffle when the pole piece material strip falls into the stacking cavity, and the second blowing mechanism is used to blow out an airflow in the direction of the first baffle when the pole piece material strip falls into the stacking cavity, and the first blowing mechanism and the second blowing mechanism are used to start alternately so that the pole piece material strip is stacked on the plug plate and forms a battery cell. Compared with the prior art, the blow stacking molding device provided by the present invention can realize rapid stacking of battery cells by blowing, because it adopts a first blowing mechanism installed on the first baffle and a second blowing mechanism installed on the second baffle, and has high stacking efficiency, a stable and reliable stacking process, saves time and cost, and effectively shortens the production cycle of lithium batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of the blow-stack molding device provided in the first embodiment of the present invention in a state where the pole pieces are stacked;

[0020] Figure 2 A schematic structural diagram of the blow-folding molding device provided in the first embodiment of the present invention in a state of unloading battery cells;

[0021] Figure 3 A schematic structural diagram of a frame in a blow-folding molding device provided in a first embodiment of the present invention;

[0022] Figure 4 A schematic structural diagram of a first blowing mechanism in a blow-folding molding device provided in a first embodiment of the present invention;

[0023] Figure 5 A schematic diagram of the structure of a plug plate in a blow-folding molding device provided in the first embodiment of the present invention;

[0024] Figure 6 A schematic structural diagram of a support plate of a lifting mechanism in a blow-folding molding device provided in a first embodiment of the present invention;

[0025] Figure 7 A schematic structural diagram of a first blowing mechanism in a blow-folding molding device provided in a second embodiment of the present invention.

[0026] Icons: 100-blow stacking molding device; 110-frame; 111-first baffle; 112-second baffle; 113-first side plate; 114-second side plate; 115-stacking cavity; 120-first blowing mechanism; 121-air pump; 122-blow pipe; 123-nozzle; 124-main pipeline; 125-branch pipeline; 126-connector; 127-air outlet pipe; 128-air outlet; 130-second blowing mechanism; 140-insert plate; 141-gap groove; 150-first driving member; 160-lifting mechanism; 161-second driving member; 162-support plate; 163-supporting part; 170-driving roller; 171-active roller; 172-driven roller; 180-cutter mechanism; 200-pole sheet strip; 300-battery cell. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply 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 limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0033] First embodiment

[0034] Please refer to Figures 1 to 6 The embodiment of the present invention provides a blow-stack forming device 100 for stacking pole sheet strips 200 to form a battery cell 300. The blow-stack forming device 100 can realize rapid stacking of the battery cell 300, with high stacking efficiency, stable and reliable stacking process, time cost saving, and effectively shortening the production cycle of lithium batteries.

[0035] It should be noted that the electrode strip 200 includes a plurality of positive electrode sheets (not shown), a plurality of negative electrode sheets (not shown) and two layers of separators (not shown). The plurality of positive electrode sheets are arranged in parallel and spaced apart, and the plurality of negative electrode sheets are arranged in parallel and spaced apart. The position of each positive electrode sheet corresponds to the position of a negative electrode sheet. The positive electrode sheet, a layer of separator, the negative electrode sheet and another layer of separator are stacked in sequence. Specifically, the hardness of the positive electrode sheet and the negative electrode sheet is greater than the hardness of the separator. When the airflow blows onto the electrode strip 200, the positive electrode sheet and the negative electrode sheet will not be deformed, but the separator between two adjacent positive electrode sheets (two adjacent negative electrode sheets) will be deformed and bent, so that the electrode strip 200 can be stacked to form a battery cell 300.

[0036] The blow stacking device 100 includes a frame 110, a first blowing mechanism 120, a second blowing mechanism 130, a plug board 140, a first driving member 150, a lifting mechanism 160, a driving roller 170 and a cutting mechanism 180. The first blowing mechanism 120 and the second blowing mechanism 130 are arranged opposite to each other and are both installed on the frame 110. The first blowing mechanism 120 and the second blowing mechanism 130 are both used to blow airflow to the falling pole sheet material strip 200 so that the pole sheet material strip 200 is stacked to form a battery cell 300. The plug plate 140 is arranged below the frame 110 and connected to the first driving member 150. The lifting mechanism 160 is arranged below the plug plate 140. The plug plate 140 is used to carry the pole piece strip 200. The first driving member 150 is used to drive the plug plate 140 to withdraw from the frame 110 after the pole piece strip 200 is stacked to form the battery cell 300, so that the battery cell 300 falls on the lifting mechanism 160. The lifting mechanism 160 is used to drive the battery cell 300 away from the frame 110 for easy unloading. The driving roller 170 is arranged above the frame 110. The position of the driving roller 170 corresponds to the position of the frame 110. The driving roller 170 is used to drive the pole piece strip 200 to accurately fall into the frame 110 and control the falling speed of the pole piece strip 200. The cutter mechanism 180 is disposed above the frame 110 , and is used to cut the electrode strip 200 , so that the fallen portion of the electrode strip 200 can be stacked to form a battery cell 300 .

[0037] It should be noted that the cutter mechanism 180 is arranged above the driving roller 170, and the position where the cutter mechanism 180 cuts is the position between two adjacent positive electrodes (two adjacent negative electrodes) on the electrode strip 200, that is, the cutter mechanism 180 will only cut the diaphragm without damaging the positive electrode and the negative electrode. When the cutter mechanism 180 cuts the electrode strip 200, the half of the electrode strip 200 located above is suspended in the air, and falls into the driving roller 170 when the electrode strip 200 is stacked next time, while the half of the electrode strip 200 located below continues to fall into the frame 110 under the drive of the driving roller 170 and the action of gravity, and is stacked to form a battery cell 300 under the action of the first blowing mechanism 120 and the second blowing mechanism 130.

[0038] Furthermore, there are two ways to unload the battery cell 300: manual unloading and robot unloading. When the lifting mechanism 160 drives the battery cell 300 to move to the preset position, the battery cell 300 can be removed manually for the next process, or the battery cell 300 can be removed automatically by a robot for the next process. The unloading method of the battery cell 300 is not specifically limited.

[0039] It is worth noting that the frame 110 includes a first baffle 111, a second baffle 112, a first side plate 113 and a second side plate 114. The first baffle 111 and the second baffle 112 are arranged opposite to each other and parallel to each other, the first side plate 113 and the second side plate 114 are arranged opposite to each other and parallel to each other, the first side plate 113, the first baffle 111, the second side plate 114 and the second baffle 112 are connected end to end, and are combined to form a stacking cavity 115 arranged in a rectangular shape, and the stacking cavity 115 is used for the electrode strip 200 to fall into.

[0040] Specifically, the insert plate 140 is arranged below the first baffle plate 111 and the second baffle plate 112. The first baffle plate 111, the second baffle plate 112, the first side plate 113, the second side plate 114 and the insert plate 140 together form a stacking cavity 115. The first baffle plate 111, the second baffle plate 112, the first side plate 113, and the second side plate 114 can all limit the pole piece strip 200, and the insert plate 140 can support the pole piece strip 200. The first blowing mechanism 120 is installed on the first baffle 111, and the second blowing mechanism 130 is installed on the second baffle 112. The first blowing mechanism 120 is used to blow air flow toward the second baffle 112 when the pole piece strip 200 falls into the stacking cavity 115, and the second blowing mechanism 130 is used to blow air flow toward the first baffle 111 when the pole piece strip 200 falls into the stacking cavity 115. The first blowing mechanism 120 and the second blowing mechanism 130 are used to be started alternately so that the pole piece strip 200 is stacked on the plug-in board 140 and forms the battery cell 300.

[0041] In this embodiment, the first blowing mechanism 120 is arranged at the top of the first baffle 111. The first blowing mechanism 120 can blow out an airflow when the pole piece strip 200 falls into the stacking cavity 115, so that the pole piece strip 200 is tilted toward the second baffle 112. At this time, the diaphragm between the two adjacent positive pole pieces (the two adjacent negative pole pieces) is deformed and bent, and the pole piece strip 200 is stacked downward under the action of gravity; the second blowing mechanism 130 is arranged at the top of the second baffle 112. The second blowing mechanism 130 can blow out an airflow when the pole piece strip 200 falls into the stacking cavity 115, so that the pole piece strip 200 is tilted toward the first baffle 111. At this time, the diaphragm between the two adjacent positive pole pieces (the two adjacent negative pole pieces) is deformed and bent, and the pole piece strip 200 is stacked downward under the action of gravity. In this way, the pole piece strip 200 is repeatedly folded under the alternating action of the first blowing mechanism 120 and the second blowing mechanism 130 to achieve rapid stacking of the battery cells 300, improve stacking efficiency, and effectively shorten the production cycle of the lithium battery.

[0042] The first blowing mechanism 120 includes an air pump 121, an air blowing pipe 122 and a nozzle 123. One end of the air blowing pipe 122 is connected to the air pump 121, and the other end is connected to the nozzle 123. The nozzle 123 is installed on the top of the first baffle 111. The air pump 121 can blow out airflow, and the airflow is ejected toward the second baffle 112 through the air blowing pipe 122 and the nozzle 123 to apply wind force to the pole piece strip 200, so that the pole piece strip 200 is tilted toward the second baffle 112. Specifically, the air blowing pipe 122 includes a main pipe 124 and a plurality of branch pipes 125. There are multiple nozzles 123. One end of the main pipe 124 is connected to the air pump 121, and the other end is connected to multiple branch pipes 125. Each branch pipe 125 is connected to a nozzle 123. The multiple nozzles 123 are arranged in parallel and spaced apart along the length direction of the first baffle 111, that is, the multiple nozzles 123 are arranged side by side on the first baffle 111. The multiple nozzles 123 can simultaneously spray airflow in the direction of the second baffle 112 to ensure that the airflow blown onto the pole piece strip 200 is smooth and uniform, so that the pole piece strip 200 is neatly stacked in the stacking cavity 115 to prevent the pole piece strip 200 from deflecting or twisting.

[0043] In this embodiment, the specific structure of the second blowing mechanism 130 is the same as that of the first blowing mechanism 120, and will not be described in detail herein. The second blowing mechanism 130 can spray airflow in the direction of the first baffle 111 to ensure that the airflow blown onto the pole piece strip 200 is smooth and uniform, so that the pole piece strip 200 is stacked neatly in the stacking cavity 115, and the pole piece strip 200 is prevented from being deflected or twisted.

[0044] It is worth noting that the lifting mechanism 160 includes a second driving member 161 and a support plate 162. The second driving member 161 is connected to the support plate 162, and the support plate 162 is used to carry the battery cell 300. The second driving member 161 can drive the support plate 162 to move so as to facilitate unloading of the battery cell 300. Specifically, the first driving member 150 can drive the plug plate 140 to move in a first direction, and the second driving member 161 can drive the support plate 162 to move in a second direction, and the first direction is perpendicular to the second direction.

[0045] In this embodiment, the first baffle 111 and the second baffle 112 are both arranged on a vertical plane, the plug plate 140 and the support plate 162 are both arranged on a horizontal plane, the first direction is the horizontal direction, and the second direction is the vertical direction. The electrode strip 200 can fall into the stacking cavity 115 in the vertical direction and fall on the plug plate 140 to form the battery cell 300; the plug plate 140 can be pulled out of the rack 110 in the horizontal direction so that the battery cell 300 falls on the support plate 162 under the action of gravity; the support plate 162 can move downward in the vertical direction to drive the battery cell 300 away from the rack 110, so as to facilitate the unloading of the battery cell 300.

[0046] In this embodiment, the first driving member 150 and the second driving member 161 are both linear motors, but are not limited to this. In other embodiments, the first driving member 150 and the second driving member 161 can be electric cylinders, pneumatic cylinders or hydraulic cylinders, and the types of the first driving member 150 and the second driving member 161 are not specifically limited.

[0047] It should be noted that the plug board 140 is provided with a clearance groove 141, and the support plate 162 is provided with a support portion 163. The position of the clearance groove 141 corresponds to the position of the support portion 163. The support portion 163 cooperates with the clearance groove 141. The support portion 163 can extend into or retract from the clearance groove 141, and the support portion 163 is used to carry the battery cell 300. When the electrode strips 200 are stacked to form the battery cells 300, the battery cells 300 are placed on the plug board 140. At this time, the support plate 162 moves upward in the vertical direction so that the support portion 163 extends into the clearance groove 141 and abuts against the bottom of the battery cell 300, so as to realize the function of the support plate 162 carrying the battery cell 300 through the support portion 163; then the plug board 140 is pulled out of the frame 110 in the horizontal direction, that is, the clearance groove 141 moves relative to the support portion 163, and the plug board 140 no longer supports or limits the battery cell 300. At this time, the support plate 162 moves downward in the vertical direction to drive the battery cell 300 to escape from the stacking cavity 115, so as to facilitate the unloading of the battery cell 300.

[0048] In this embodiment, the plug board 140 is in a comb shape or a sawtooth shape, and the number of the clearance grooves 141 and the supporting parts 163 are both multiple, and the multiple clearance grooves 141 are parallel and spaced apart on the plug board 140, and the multiple supporting parts 163 are parallel and spaced apart on the supporting plate 162. Each supporting part 163 cooperates with a clearance groove 141, that is, each supporting part 163 can extend into or retract from a clearance groove 141, and the multiple supporting parts 163 work together to support the battery cell 300, so as to improve the stability of the battery cell 300 and prevent the battery cell 300 from falling from the supporting plate 162.

[0049] The driving roller 170 includes an active roller 171 and a driven roller 172 which are arranged in parallel and spaced apart. The axial directions of the active roller 171 and the driven roller 172 are both in the horizontal direction and are arranged perpendicular to the first side plate 113 and the second side plate 114. The pole piece strip 200 is clamped between the active roller 171 and the driven roller 172. The active roller 171 is used to control the falling speed of the pole piece strip 200. The active roller 171 and the driven roller 172 work together to limit the falling position of the pole piece strip 200, so as to ensure that the pole piece strip 200 can fall into the middle of the stacking cavity 115.

[0050] It is worth noting that during the working process of the blow-stack forming device 100, the pole piece strip 200 is first driven to fall into the stacking cavity 115 by driving the pressure roller 170. During this process, the first blowing mechanism 120 and the second blowing mechanism 130 blow airflow toward the pole piece strip 200 alternately in turn, so that the pole piece strip 200 is folded on the plug board 140 left and right; when the fallen pole piece strip 200 reaches a certain length, the pole piece strip 200 is cut off by the cutting mechanism 180, and the half of the pole piece strip 200 located above stops falling, and the half of the pole piece strip 200 located below continues to fall and stack; after the pole piece strips 200 are stacked to form the battery cell 300, the first driving member 150 drives the plug board 140 along The frame 110 is pulled out in the first direction, and the battery cell 300 now completely falls on the supporting portion 163 of the support plate 162; then the second driving member 161 drives the support plate 162 to descend along the second direction, so that the battery cell 300 escapes from the stacking cavity 115, which is convenient for unloading; when the battery cell 300 completely escapes from the stacking cavity 115, the first driving member 150 drives the plug plate 140 to reset, and the plug plate 140 extends to the bottom of the stacking cavity 115, and drives the pressing roller 170 to drive the electrode strip 200 to fall into the stacking cavity 115 again; after unloading is completed, the second driving member 161 drives the support plate 162 to reset, and the supporting portion 163 of the support plate 162 extends into the make way slot 141 of the plug plate 140, and supports the bottom of the battery cell 300 again. In this way, the pole piece material strip 200 is folded repeatedly by utilizing the natural gravity of the pole piece material strip 200 and the wind force blown out by the first blowing mechanism 120 and the second blowing mechanism 130, so that the lamination efficiency is high and the lamination stability is strong.

[0051] The blow stacking molding device 100 provided in an embodiment of the present invention comprises a frame 110 including a first baffle 111 and a second baffle 112 arranged in parallel and at intervals, an insert plate 140 being arranged below the first baffle 111 and the second baffle 112, the first baffle 111, the insert plate 140 and the second baffle 112 jointly forming a stacking cavity 115, a first blowing mechanism 120 being mounted on the first baffle 111, and a second blowing mechanism 130 being mounted on the second baffle 112, the first blowing mechanism 120 being used to blow out an airflow in the direction of the second baffle 112 when the electrode strip 200 falls into the stacking cavity 115, the second blowing mechanism 130 being used to blow out an airflow in the direction of the first baffle 111 when the electrode strip 200 falls into the stacking cavity 115, and the first blowing mechanism 120 and the second blowing mechanism 130 being used to be started alternately so that the electrode strip 200 is stacked on the insert plate 140 and a battery cell 300 is formed. Compared with the prior art, the blow-stack molding device 100 provided by the present invention adopts a first blowing mechanism 120 installed on the first baffle 111 and a second blowing mechanism 130 installed on the second baffle 112. Therefore, it can achieve rapid stacking of the battery cells 300 by blowing, with high stacking efficiency, stable and reliable stacking process, saving time and cost, and effectively shortening the production cycle of lithium batteries.

[0052] Second embodiment

[0053] Please refer to Figure 7 The embodiment of the present invention provides a blow-folding molding device 100. Compared with the first embodiment, the difference of this embodiment lies in the different specific structures of the first blowing mechanism 120 and the second blowing mechanism 130.

[0054] In this embodiment, the first blowing mechanism 120 includes a connector 126 and an air outlet pipe 127. One end of the connector 126 is connected to the air pump 121, and the other end is connected to the air outlet pipe 127. The air outlet pipe 127 is installed on the top of the first baffle 111. The air outlet pipe 127 is provided with a plurality of air outlets 128 in parallel and spaced along its axial direction. The air outlets 128 are arranged on one side of the air outlet pipe 127 close to the second baffle 112. The air pump 121 can blow out airflow, which passes through the connector 126 and the air outlet pipe 127 in sequence, and is blown out from the plurality of air outlets 128 in the direction close to the second baffle 112, so as to apply wind force to the pole piece strip 200, so that the pole piece strip 200 is tilted in the direction of the second baffle 112. In this way, it can be ensured that the airflow blowing onto the pole piece strip 200 is smooth and uniform, so that the pole piece strip 200 is stacked regularly in the stacking cavity 115, and the pole piece strip 200 is prevented from being deflected or twisted.

[0055] In this embodiment, the specific structure of the second blowing mechanism 130 is the same as the specific structure of the first blowing mechanism 120 , and will not be described in detail herein.

[0056] The beneficial effects of the blow-folding molding device 100 provided in the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail herein.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blow-folding device, characterized in that: The invention comprises a frame, a first blowing mechanism, a second blowing mechanism and a plug-in plate, wherein the frame comprises a first baffle plate and a second baffle plate arranged in parallel and at intervals, the plug-in plate is arranged below the first baffle plate and the second baffle plate, the first baffle plate, the plug-in plate and the second baffle plate jointly form a stacking cavity, the first blowing mechanism is mounted on the first baffle plate, the second blowing mechanism is mounted on the second baffle plate, the first blowing mechanism is used to blow out an airflow in the direction of the second baffle plate when the pole piece strip falls into the stacking cavity, the second blowing mechanism is used to blow out an airflow in the direction of the first baffle plate when the pole piece strip falls into the stacking cavity, the first blowing mechanism and the second blowing mechanism are used to be started alternately so that the pole piece strip is stacked on the plug-in plate and forms a battery cell; Among them, the blow-folding molding device also includes a driving roller and a cutting mechanism, the driving roller is arranged above the frame, the driving roller includes an active roller and a driven roller arranged in parallel and spaced apart, the pole piece strip is clamped between the active roller and the driven roller, the active roller is used to control the falling speed of the pole piece strip; the cutting mechanism is arranged above the frame, and the cutting mechanism is used to cut off the pole piece strip.

2. The blow-folding device according to claim 1, characterized in that: The first air blowing mechanism comprises an air pump, an air blowing pipe and a nozzle. One end of the air blowing pipe is connected to the air pump, and the other end is connected to the nozzle. The nozzle is installed on the top of the first baffle.

3. The blow-folding device according to claim 2, characterized in that: The air blowing pipe includes a main pipe and multiple branch pipes, and the number of the nozzles is multiple. One end of the main pipe is connected to the air pump, and the other end is respectively connected to the multiple branch pipes. Each branch pipe is connected to one nozzle, and the multiple nozzles are arranged in parallel and at intervals.

4. The blow-folding device according to claim 1, characterized in that: The blow-folding molding device also includes a first driving member and a lifting mechanism, wherein the first driving member is connected to the plug plate, and the lifting mechanism is arranged below the plug plate, and the first driving member can drive the plug plate to move in a first direction so that the battery cell falls on the lifting mechanism, and the lifting mechanism can drive the battery cell to move in a second direction away from the frame to facilitate unloading of the battery cell, and the first direction is arranged perpendicular to the second direction.

5. The blow-folding device according to claim 4, characterized in that: The lifting mechanism includes a second driving member and a supporting plate. The second driving member is connected to the supporting plate. The second driving member can drive the supporting plate to move in the second direction. The supporting plate is used to carry the battery cell.

6. The blow-folding device according to claim 5, characterized in that: The plug board is provided with a clearance groove, and the support plate is provided with a support portion. The position of the clearance groove corresponds to the position of the support portion. The support portion can extend into or retract from the clearance groove, and the support portion is used to carry the battery cell.

7. The blow-folding device according to claim 6, characterized in that: There are multiple numbers of the giving way slots and the supporting parts. Multiple giving way slots are arranged on the plug board in parallel and at intervals, and each supporting part cooperates with one giving way slot.

8. The blow-folding device according to any one of claims 1 to 7, characterized in that: The frame further includes a first side plate and a second side plate, the first side plate is arranged opposite to the second side plate, the stacking cavity is arranged between the first side plate and the second side plate, and the first side plate, the first baffle plate, the second side plate and the second baffle plate are connected end to end.

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