A battery cell stacking box

Abstract

The present application discloses a battery cell stacking box, which belongs to the field of lithium battery processing and is applied to a lithium battery stacking machine. The battery cell stacking box comprises a U-shaped fixing seat, a limiting device, a material rack and a jacking assembly: the U-shaped fixing seat is installed on the lithium battery stacking machine; the limiting device is arranged on the inner bottom surface of the U-shaped fixing seat; its technical points are that the battery cell stacking box of the present invention changes the existing material rack fixing setting method into a guiding component guiding and cooperating with the pneumatic limiting member to limit the method, which can be directly docked with the conveying structure, and the pneumatic limiting member releases the limit after the battery cells are taken out, and the conveying structure directly conveys the material rack loaded with battery cells to the U-shaped fixing seat and limits it through the pneumatic limiting member. The process of replacing the material rack only takes 15-20 seconds, which improves efficiency compared to the existing 2-3 minutes required to replace a material rack, and at the same time saves the labor cost required for replacing the material rack, and has good usage prospects.

Description

Technical Field

[0001] The invention belongs to the field of lithium battery processing, and in particular relates to a battery cell stacking box. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloys as the positive and negative electrode materials and a non-aqueous electrolyte solution. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use place high demands on the environment. With the advancement of science and technology, lithium batteries have become mainstream.

[0003] Lithium batteries are mainly divided into lamination process and winding process according to the process;

[0004] The lamination process is to cut the positive and negative electrode sheets into the required size, and then stack them together with the separator to form a small battery cell. The small battery cells are then stacked in parallel to form a battery module.

[0005] The winding process involves using a fixed winding needle to wind the stripped positive electrode sheet, separator, and negative electrode sheet in a specific order, extruding them into a cylindrical, elliptical, or square shape. These wound electrode sheets are then placed in a square or cylindrical metal casing. The electrode sheet size and number of windings are typically determined by the battery's designed capacity.

[0006] However, in comparison, the stacking process has a high capacity density: the stacking process can make better use of the internal space, and compared with the winding process, the battery has a higher capacity under the same volume, and high energy density: the battery manufactured by the stacking process has a higher discharge platform and volume specific capacity, so it can have a higher energy density, and flexible size: the stacking process can design the size of each electrode according to the size of the lithium battery, so it can be made into any shape. Therefore, lithium batteries gradually adopt stacked batteries.

[0007] When stacking lithium batteries, accuracy needs to be ensured, so people invented battery cell stacking boxes.

[0008] The existing patent application, CN106429431, titled "A Lithium Battery Cell Stacking Machine Pole Sheet Loading Device," describes the use of an ion air knife to blow the upper layer of pole pieces at the opening of the magazine, causing them to float and separate, removing static electricity and dust from the pole pieces. The suction cup of the pole piece removal mechanism grabs the pole piece and moves it upward. During this movement, a brush brushes the pole piece, separating it again. This allows for the capture of a single pole piece, avoiding the need to capture multiple pole pieces at once when they overlap and adhere. The ion air knife and brush work together to improve pole piece separation efficiency, achieving a good separation effect.

[0009] However, research has found that the above solution has certain drawbacks when used;

[0010] 1. Existing battery cell stacking boxes mostly use bolts to fix the racks. When the battery cells in a set of racks are used, workers need to quickly disassemble and replace the racks. This process takes 2-3 minutes for a skilled worker to replace a rack. Therefore, the process consumes a long time, resulting in long downtime, affecting the processing efficiency of lithium batteries and failing to meet people's usage requirements.

[0011] 2. Moreover, as people's requirements for quality increase, the requirements for battery cell position accuracy are also constantly increasing. The above solution uses an ion air knife to move up and down directly to blow the battery cells to float. Due to the stacking of battery cells, when blowing the upper battery cells to float, the positions of the top few battery cells will be offset, which will make the battery cells appear inaccurately positioned. Alternatively, there is a technology that uses a shaking separation solution. During the shaking process, there is a large position offset when the battery cells are dropped, which affects the accuracy of lithium battery processing. Therefore, the battery cells used are larger in size, and the battery cells are further cut later, resulting in a large amount of material waste, which does not meet people's requirements for lithium battery quality. Summary of the Invention

[0012] In order to overcome the shortcomings of the prior art, an embodiment of the present application provides a battery cell stacking box, which changes the existing way of fixing the material rack into a way of guiding the guide assembly and limiting the position with the pneumatic limiter. It can be directly docked with the conveying structure. After the battery cells are taken out, the pneumatic limiter releases the limit, and the conveying structure directly conveys the material rack loaded with battery cells to the U-shaped fixed seat, and is limited by the pneumatic limiter. The process of replacing the material rack only takes 15-20 seconds. Compared with the existing method of replacing a material rack, which takes 2-3 minutes, it greatly improves efficiency and saves the labor cost required for replacing the material rack. It has good prospects for use.

[0013] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0014] A battery cell stacking box, which is used in a lithium battery stacking machine, includes a U-shaped fixing seat, a limiting device, a material rack and a lifting assembly:

[0015] The U-shaped fixing seat is installed on the lithium battery stacking machine;

[0016] The limiting device is arranged on the inner bottom surface of the U-shaped fixing seat;

[0017] The material rack is detachably mounted on the U-shaped fixing seat through a limiting device;

[0018] The lifting assembly is installed on the U-shaped fixing seat and is used to change the height of the battery cells on the rack;

[0019] Wherein, the limiting device includes a guide assembly and a pneumatic limiting member:

[0020] There are two groups of guide assemblies, which are arranged on the inner bottom surface of the U-shaped fixing seat near both sides, and the material rack moves along the guide assemblies;

[0021] The pneumatic limiter is installed on the inner bottom surface of the U-shaped fixing seat and is used to limit the position of the material rack.

[0022] The material rack is installed on the U-shaped fixed seat through a limit device, and the U-shaped fixed seat is installed on the lithium battery stacking machine. When in use, the jacking assembly is started and rises at a uniform speed at the set speed, changing the height of the battery cells so that the height of the top battery cells is within a relatively constant range, which can facilitate the suction structure in the loading device of the lithium battery stacking machine to absorb the battery cells.

[0023] The present invention records a battery cell stacking box, which changes the existing material rack fixing method into a method of guiding by a guide component and limiting by a pneumatic limiter. It can directly dock with a conveying structure. After the battery cells are taken out, the pneumatic limiter releases the limit, and the conveying structure directly conveys the material rack loaded with battery cells to a U-shaped fixed seat, and is limited by the pneumatic limiter. The process of replacing the material rack only takes 15-20 seconds, compared with the existing method of replacing a material rack which takes 2-3 minutes, it greatly improves efficiency and saves the labor cost required for replacing the material rack, and has good prospects for use.

[0024] Preferably, the guide assembly includes a guide wheel set and a guide bar:

[0025] The guide wheel assembly is installed on the inner bottom surface of the U-shaped fixing seat near the side end, and the outer surface of the guide wheel assembly is in contact with the side end surface of the material rack;

[0026] The guide bar is arranged on one side of the guide wheel group;

[0027] Wherein, a guide groove having a shape corresponding to the guide bar is provided on the lower end surface of the material rack, and the guide groove slides along the guide bar.

[0028] The end face of the guide bar is Ω-shaped, which can limit the material rack and prevent the material rack from swinging. The setting of the guide wheel group can make the guide groove on the material rack and the guide bar docking more convenient and accurate.

[0029] Preferably, the pneumatic limiter includes two groups of limit cylinders for limiting the front end position and the rear end position of the bottom of the material rack. The main bodies of the two groups of limit cylinders are installed on the lower end surface of the U-shaped fixed seat. The middle position of the front end surface and the middle position of the rear end surface of the material rack are provided with limit grooves, and the telescopic end of the limit cylinder is located inside the limit groove.

[0030] When in use, the limit cylinder is started and inserted into the limit slot on the material rack, thereby limiting the front and rear positions of the material rack, thereby effectively preventing the material rack from moving.

[0031] Preferably, the lifting assembly includes a rod motor, a mounting frame and a lifting plate:

[0032] The main body of the rod motor is fixedly mounted on the U-shaped fixing seat, the upper end of the rod of the rod motor passes through the opening on the U-shaped fixing seat, and the lower end surface of the rod of the rod motor is fixedly mounted with a metal sheet;

[0033] The mounting frame is fixedly mounted on the lower end surface of the U-shaped fixing base, and a plurality of proximity sensors for monitoring the position of the metal sheet are fixedly mounted on the outer surface of the mounting frame;

[0034] The lifting plate is fixedly mounted on the upper end of the rod body, and a light-sensitive sensor for monitoring the presence of a battery cell is embedded and fixedly mounted in the middle of the upper end surface of the lifting plate.

[0035] The rod motor can also be replaced by a screw structure with higher precision. Compared with the screw structure, the price of the rod motor is more suitable.

[0036] The setting of the proximity sensor can detect the running speed of the rod motor and prevent the rod motor from over-running. When the uppermost proximity sensor senses the metal sheet, the rod motor stops moving.

[0037] The design of the photosensor can determine whether there are battery cells on the rack, playing an auxiliary role.

[0038] The data of the electronic instrument in the present invention is sent to the lithium battery stacking machine, which is then centrally controlled by the lithium battery stacking machine.

[0039] Preferably, a plurality of adjustment slots are provided on the side end surface of the material rack, and position-limiting bars for limiting the position of the battery cells are installed at the adjustment slots by bolts.

[0040] The limit bars limit the position of the battery cells from the side, and the number of limit bars is selected according to the size of the battery cells. When the size of the battery cells is large, more limit bars are installed. The number of limit bars is preferably eight groups, two groups in each direction of front, back, left and right.

[0041] Preferably, the lower end surface of the adjustment groove and the side end of the upper end surface of the limiting stop bar are both provided with tooth structures, and the tooth structures on the limiting stop bar are engaged with the tooth structures on the lower end surface of the adjustment groove.

[0042] The toothed structure on the limit stop bar meshes with the toothed structure on the lower end surface of the adjustment groove, so the position of the limit stop bar will not shift when it is fixed by bolts, and the fixation is relatively convenient, and the size adjustment is relatively convenient and accurate.

[0043] The present invention records a battery cell stacking material box, the limit bars on which the material rack can be adjusted according to needs, and can be used to limit the positions of battery cells of different sizes. In addition, tooth structures are provided on the limit bars and the adjustment grooves. The setting of the tooth structure makes the position adjustment of the limit bars more convenient and more precise, which solves the problem in the prior art that the limit bars are fixed and different material racks need to be replaced for battery cells of different sizes. The invention has good prospects for use.

[0044] Preferably, two groups of separation components are installed on the U-shaped fixing seat at the battery cell unloading position, and the two groups of separation components are symmetrically arranged with the material rack as the center.

[0045] The separation component separates the battery cells from the side.

[0046] Preferably, the separation assembly includes an adjustment assembly, an air box and a retractable air pipe:

[0047] The adjustment assembly is installed on the U-shaped fixing seat;

[0048] The air box is located inside the U-shaped fixing seat and is connected to the adjustment assembly;

[0049] One end of the telescopic air pipe is communicated with the interior of the air box.

[0050] The adjustment component can change the position of the air box so that the air box is close to the battery cells, which can better separate the battery cells.

[0051] Preferably, the adjustment assembly includes two sets of telescopic rods, the main bodies of which are fixedly mounted on a U-shaped fixing seat, and the telescopic ends of the telescopic rods are fixedly connected to the air box.

[0052] The telescopic rod can be a pneumatic rod or an electric rod, which mainly has a position adjustment function.

[0053] Preferably, the interior of the air box is provided with several groups of air knives for separating battery cells, the air pressure of the topmost air knife is greater than the air pressure of other air knives, and the upper end surface of the air box is provided with a brush member for applying downward pressure to the battery cells being separated.

[0054] The wind knife below is located in the upper middle part of the material rack. Its air pressure is low, mainly to leave a certain gap at the edge of the battery cell.

[0055] The top wind knife is located at the suction structure in the lithium battery stacking machine loading device where the battery cells are sucked. The air pressure is high and can be blown directly into the gap to separate the battery cells directly. Under normal conditions, the battery cells can be separated.

[0056] The brush is equivalent to auxiliary separation. When the battery cell rises, it will exert a downward force. When the battery cell is not separated, it will contact the battery cell below and sweep the battery cell down. It is the final means of separating lithium battery cells.

[0057] The present invention records a battery cell stacking material box, which records a separation component. The separation component adopts multiple air knife treatments to initially separate the battery cells in the middle and upper parts, and increases air pressure at the suction part to completely separate the battery cells. In addition, the material rack with precise size can avoid the situation where the position of the upper part of the battery cells is disordered during separation, and can ensure the accuracy of the battery cell position, thereby ensuring the quality of the lithium battery. It has good use effect and has good use prospects.

[0058] In summary, the present invention includes at least one of the following beneficial technical effects:

[0059] First, in a battery cell stacking box of the present invention, the existing material rack fixing method is changed to a method of guiding the guide component and limiting with the pneumatic limiter, which can be directly docked with the conveying structure. After the battery cells are taken out, the pneumatic limiter releases the limit, and the conveying structure directly conveys the material rack loaded with battery cells to the U-shaped fixed seat, and is limited by the pneumatic limiter. The process of replacing the material rack only takes 15-20 seconds, compared with the existing method of replacing a material rack which takes 2-3 minutes, it greatly improves efficiency and saves the labor cost required for replacing the material rack, and has good prospects for use.

[0060] Secondly, in a battery cell stacking box of the present invention, the limit bars on the material rack can be adjusted according to needs, and can be used to limit the positions of battery cells of different sizes. In addition, tooth structures are provided on the limit bars and the adjustment grooves. The setting of the tooth structures makes the position adjustment of the limit bars more convenient and more precise, which solves the problem in the prior art that the limit bars are fixed and different material racks need to be replaced for battery cells of different sizes. The invention has good prospects for use.

[0061] Third, a separation component is recorded in a battery cell stacking material box of the present invention. The separation component adopts multiple air knife treatments to preliminarily separate the battery cells in the middle and upper parts, and increase air pressure at the suction part to make the battery cells completely separated. In addition, the material rack with precise size can avoid the situation where the position of the upper part of the battery cells is disordered during separation, and can ensure the accuracy of the battery cell position, thereby ensuring the quality of the lithium battery, having good use effect and good use prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0063] Figure 2 It is a structural diagram of the present invention from other angles;

[0064] Figure 3 It is a partial structural diagram of the present invention;

[0065] Figure 4It is a structural diagram of the material rack in the present invention;

[0066] Figure 5 This invention Figure 4 A magnified view of the structure at center A;

[0067] Figure 6 It is a partial structural diagram of the limit stop bar in the present invention;

[0068] Figure 7 It is a structural diagram of the U-shaped fixing seat in the present invention;

[0069] Figure 8 It is a partial structural diagram of the U-shaped fixing seat in the present invention;

[0070] Figure 9 It is a partial structural diagram of the separation component in the present invention;

[0071] Figure 10 This is a schematic diagram of the principle of using an air knife to separate battery cells in the present invention.

[0072] Figure numerals: 1. U-shaped fixing seat; 2. Material rack; 3. Guide wheel assembly; 4. Guide bar; 5. Limit cylinder; 6. Rod motor; 7. Mounting frame; 8. Lifting plate; 9. Photosensitive sensor; 10. Adjustment slot; 11. Limit stop bar; 12. Air box; 13. Retractable air pipe; 14. Retractable rod; 15. Air knife; 16. Brush piece. DETAILED DESCRIPTION

[0073] The embodiment of the present application provides a battery cell stacking box to solve the problem that most existing battery cell stacking boxes use bolts to fix the material racks when in use. When the battery cells in a group of material racks are used, workers need to quickly disassemble and replace the material racks. This process takes 2-3 minutes for a skilled worker to replace a material rack. Therefore, the process consumes a relatively long time, resulting in a relatively long downtime, affecting the processing efficiency of lithium batteries and failing to meet people's usage requirements. The battery cell stacking box of the present invention changes the existing material rack fixing method into a method in which a guide component guides and cooperates with a pneumatic limiter to limit the position. It can be directly docked with the conveying structure. After the battery cells are taken out, the pneumatic limiter releases the limit, and the conveying structure directly conveys the material rack loaded with battery cells to the U-shaped fixed seat. And through the pneumatic limiter to limit the position, the process of replacing the material rack only takes 15-20 seconds, compared with the existing method of replacing a material rack which takes 2-3 minutes, it greatly improves efficiency and saves the labor cost required for replacing the material rack, and has good usage prospects.

[0074] Example 1:

[0075] A battery cell stacking box, such as Figures 1-9As shown, it is applied to a lithium battery stacking machine. The battery stacking box includes a U-shaped fixing seat 1, a limiting device, a material rack 2 and a lifting component:

[0076] The U-shaped fixing base 1 is installed on the lithium battery stacking machine. It adopts a U-shaped installation method similar to the existing structure, and its front and back are connected. Therefore, when the next material rack 2 moves to this position, it can be pushed away by the previous group of material racks 2 to realize the switching of material racks 2; the limit device is set on the inner bottom surface of the U-shaped fixing base 1; the material rack 2 is detachably mounted on the U-shaped fixing base 1 through the limit device; the lifting assembly is installed on the U-shaped fixing base 1, and is used to change the height of the battery cells on the material rack 2;

[0077] Among them, the limiting device includes a guide component and a pneumatic limiting component:

[0078] There are two groups of guide components, which are arranged on the inner bottom surface of the U-shaped fixed seat 1 near the two sides, and the material rack 2 moves along the guide components; the pneumatic limiter is installed on the inner bottom surface of the U-shaped fixed seat 1 to limit the position of the material rack 2.

[0079] The material rack 2 is installed on the U-shaped fixing seat 1 through a limiting device. The U-shaped fixing seat 1 is installed on the lithium battery stacking machine. When in use, the jacking component is started and rises at a uniform speed according to the set speed to change the height of the battery cell so that the height of the top battery cell is within a relatively constant range (using the suction method, it can be sucked within a certain distance, so it is sufficient to ensure a certain range, and the battery cell is very thin. The method of adjusting one battery cell at a time requires very high cost, so it is not selected unless necessary), so that the suction structure in the loading device of the lithium battery stacking machine can easily suck the battery cell.

[0080] The rack 2 is provided with a handle, and can also be manually pulled out and replaced. This takes 2 minutes, which is slightly shorter than the existing method of fixing with bolts. This method is the same as the existing pneumatic limit method. Since most of the time required to replace the rack 2 is spent on transporting and aligning the rack 2, saving the transport and alignment of the rack 2 can save most of the time and greatly improve efficiency.

[0081] Pneumatic limiters can also be replaced by electric rods.

[0082] The present invention records a battery cell stacking box, which changes the existing fixed setting method of the material rack 2 into a method of limiting the position with a guide component and a pneumatic limiter. It can directly dock with the conveying structure. After the battery cells are taken out, the pneumatic limiter releases the limit, and the conveying structure directly conveys the material rack 2 loaded with battery cells to the U-shaped fixed seat 1, and is limited by the pneumatic limiter. The process of replacing the material rack 2 only takes 15-20 seconds (the higher the height of the material rack 2, the lower the movement speed of the material rack 2 will be to ensure the accuracy of docking, so the time for replacing the material rack 2 is not fixed). Compared with the existing method of replacing the material rack 2 for 2-3 minutes, it greatly improves the efficiency and saves the labor cost required for replacing the material rack 2 (no manual replacement by workers is required), and has good prospects for use.

[0083] In the existing lithium battery stacking field, some battery cell folding structures need to be set up. The battery cell folding structures or other battery cell separation structures will take up some space, resulting in insufficient space around the material rack 2 and the inability to set up a structure for automatically replacing the material rack 2. Therefore, all manual loading and unloading of the material rack 2 is adopted, which takes a relatively long time.

[0084] This patent improves the battery cell separation technology, so that the space around the material rack 2 is relatively sufficient, so that the material rack 2 can be directly pushed and automatically replaced, which has a better effect.

[0085] The guide assembly includes a guide wheel set 3 and a guide bar 4:

[0086] The guide wheel group 3 is installed on the inner bottom surface of the U-shaped fixing seat 1 near the side end position, and the outer surface of the guide wheel group 3 is in contact with the side end surface of the material rack 2 to guide from the outside; the guide bar 4 is provided on one side of the guide wheel group 3;

[0087] The lower end surface of the material rack 2 is provided with a guide groove having a shape corresponding to the guide bar 4 , and the guide groove slides along the guide bar 4 .

[0088] The end face of the guide bar 4 is Ω-shaped, which can limit the material rack 2 and prevent the material rack 2 from swinging. The setting of the guide wheel group 3 can make the guide groove on the material rack 2 and the guide bar 4 docking more conveniently and accurately.

[0089] The pneumatic limiter includes two sets of limit cylinders 5 for limiting the front end position and the rear end position of the bottom of the material rack 2. The main bodies of the two sets of limit cylinders 5 are installed on the lower end surface of the U-shaped fixed seat 1. Limit grooves are provided in the middle position of the front end surface and the middle position of the rear end surface of the material rack 2. The telescopic end of the limit cylinder 5 is located inside the limit groove.

[0090] The telescopic end of the limiting cylinder 5 is fixedly mounted with a limiting strip, and the contact area between the limiting strip and the limiting groove is wider, so the limiting effect is better.

[0091] When in use, the limiting cylinder 5 is started and inserted into the limiting groove on the material rack 2, thereby limiting the front and rear positions of the material rack 2, thereby effectively preventing the material rack 2 from moving.

[0092] The lifting assembly includes a rod motor 6, a mounting frame 7 and a lifting plate 8:

[0093] The main body of the rod motor 6 is fixedly mounted on the U-shaped fixing seat 1, the upper end of the rod of the rod motor 6 passes through the opening on the U-shaped fixing seat 1, and a metal sheet is fixedly mounted on the lower end surface of the rod of the rod motor 6;

[0094] The mounting frame 7 is fixedly mounted on the lower end surface of the U-shaped fixing base 1. The outer surface of the mounting frame 7 is fixedly mounted with a plurality of proximity sensors for monitoring the position of the metal sheet, which have the effect of sensing whether the upper limit and lower limit of movement are reached and judging the movement speed by sensing;

[0095] The lifting plate 8 is fixedly mounted on the upper end of the rod body, and a light-sensitive sensor 9 for monitoring the presence of a battery cell is embedded and fixedly mounted in the middle of the upper end surface of the lifting plate 8 .

[0096] The row rod motor 6 can also be replaced by a screw structure with higher precision. Compared with the screw structure, the price of the row rod motor 6 is more suitable.

[0097] The setting of the proximity sensor can detect the running speed of the rod motor 6 and prevent the rod motor 6 from over-running. When the uppermost proximity sensor senses the metal sheet, the rod motor 6 stops moving.

[0098] The design of the photosensor 9 can determine whether there are battery cells on the rack 2, which plays an auxiliary role. An alarm can be installed to play an indication role.

[0099] The data of the electronic instrument in the present invention is sent to the controller on the lithium battery stacking machine, and is uniformly controlled by the controller on the lithium battery stacking machine.

[0100] Example 2:

[0101] On the basis of Example 1, Figures 1-9 As shown, this embodiment is a partial structure of the material rack.

[0102] The side end face of the material rack 2 is provided with several groups of adjustment grooves 10, and the adjustment grooves 10 are installed with limit bars 11 for limiting the position of the battery cells by bolts. The upper end face of the limit bar 11 is inclined to guide the separated battery cells back to their original positions, thereby ensuring the accuracy of the battery cell position.

[0103] The limiting block bars 11 limit the position of the battery cell from the side. The number of limiting block bars 11 is selected according to the size of the battery cell. When the size of the battery cell is large, more groups of limiting block bars 11 are installed. The number of limiting block bars 11 is preferably eight groups, two groups in each direction of front, back, left and right, and the limiting effect will be better. When the size of the battery cell is small, the number of limiting block bars 11 is preferably four groups, one group in each direction of front, back, left and right, to ensure the limiting effect.

[0104] The lower end surface of the adjustment groove 10 and the side end of the upper end surface of the limiting stop bar 11 are both provided with tooth structures, and the tooth structures on the limiting stop bar 11 are engaged with the tooth structures on the lower end surface of the adjustment groove 10 .

[0105] The toothed structure on the limit stop bar 11 meshes with the toothed structure on the lower end surface of the adjustment groove 10, so the position of the limit stop bar 11 will not shift when it is fixed by bolts, and its fixation is more convenient, and its size adjustment is more convenient and more accurate.

[0106] The tooth structure is set according to the precision requirement. The higher the precision requirement, the smaller and deeper the tooth structure. In this state, the contact area of ​​the tooth structure will be larger and its fixation will be more firm. The tooth structure is made of high-strength material and will not deform easily.

[0107] Because the tooth-like structure is relatively small, the enlarged view cannot be clearly observed, so the enlarged view in this patent is a schematic diagram.

[0108] The present invention records a battery cell stacking material box, in which the limit bar 11 on the material rack 2 can be adjusted according to needs and can be suitable for limiting the position of battery cells of different sizes. In addition, a tooth structure is provided on the limit bar 11 and the adjustment groove 10. The setting of the tooth structure makes the position adjustment of the limit bar 11 more convenient and more precise, which solves the problem in the prior art that the limit bar 11 is fixed and different material racks 2 need to be replaced for battery cells of different sizes. The invention has good prospects for use.

[0109] The material rack 2 of this patent has high precision and will not apply lateral force to the battery cells when in use. Therefore, the battery cells will not be excessively attracted and their separation is relatively convenient. Therefore, the battery cells can be separated without the need for multiple separation devices to be combined, and the use effect is relatively good.

[0110] The existing methods use bolts to directly fix or use an electric push rod to drive the limit stop bar 11 to limit the position of the battery cell. When bolts are used for direct fixation, the position of the limit stop bar 11 will have movement deviations, and the limit will be loose or tight, which will apply lateral force to the battery cell. When an electric push rod is used to drive the limit stop bar 11 to limit the position of the battery cell, the electric push rod will inevitably drive the limit stop bar 11 to impact the battery cell. After the battery cell is subjected to force, it will bend slightly. At the bend, the adsorption between the battery cells will be stronger, making it difficult to separate the battery cells subsequently.

[0111] Two sets of separation components are installed on the U-shaped fixing seat 1 at the battery cell unloading position. The two sets of separation components are symmetrically arranged with the material rack 2 as the center, and the two ends are symmetrical, so that the battery cells are evenly stressed during separation.

[0112] Example 3:

[0113] On the basis of Example 2, Figures 1-10 As shown, this embodiment shows the structure of the elastic support assembly;

[0114] The separation component separates the battery cells from the side.

[0115] The separation assembly includes an adjustment assembly, an air box 12 and a telescopic air pipe 13:

[0116] The adjustment component is installed on the U-shaped fixing base 1; the air box 12 is located on the inner side of the U-shaped fixing base 1, and the air box 12 is connected to the adjustment component; one end of the telescopic air pipe 13 is connected to the interior of the air box 12.

[0117] The adjustment component can change the position of the air box 12 so that the air box 12 is close to the battery cells, which can better separate the battery cells.

[0118] The retractable air pipe 13 can realize air supply at different positions, and the retractable air pipe 13 adopts a flexible pipe.

[0119] The adjustment assembly includes two sets of telescopic rods 14 , the main bodies of which are fixedly mounted on the U-shaped fixing seat 1 , and the telescopic ends of the telescopic rods 14 are fixedly connected to the air box 12 .

[0120] The telescopic rod 14 can be a pneumatic rod or an electric rod, which mainly has a position adjustment function.

[0121] The inside of the air box 12 is provided with several groups of air knives 15 for separating the battery cells. The air pressure of the top air knife 15 is greater than the air pressure of the other air knives 15. The upper end surface of the air box 12 is provided with a brush part 16 for applying downward pressure to the battery cells being separated.

[0122] The air outlet of the wind knife 15 is 0.05 mm. The narrower the air outlet of the wind knife 15, the less interference it has on the surrounding battery cells. However, the narrower the air outlet, the higher the cost. Therefore, 0.05 mm is used to separate the battery cells using the Coanda effect principle.

[0123] When in use, the distance between the air box 12 and the battery cells is 10-30 mm. At this time, the thickness of the air curtain formed is relatively thin and can directly enter the gaps between the battery cells.

[0124] This patent is mainly used for relatively wide battery cells. Because their contact surface is relatively wide, they cannot be separated directly under normal circumstances and need to be used in conjunction with other structures.

[0125] The air knife 15 at the bottom consumes 110 liters of gas per minute, which can achieve slight separation of the edges of the battery cells. The air knife 15 at the top consumes 158 liters of gas per minute, which can separate the battery cells that are attached together. A pressure gauge is provided on the air box 12 to serve as a monitoring tool.

[0126] The length of the wind knife 15 is 12 inches. When the battery cell is longer, a longer wind knife 15 is used (a plurality of wind knives 15 can be combined into a longer wind knife 15), and the air intake is also adjusted accordingly.

[0127] The lower wind knife 15 is located in the upper middle part of the material rack 2, and its air pressure is small, mainly to leave a certain gap at the edge of the battery cell. In this case, the overall position of the battery cell will not change.

[0128] The top wind knife 15 is located at the place where the suction structure in the lithium battery stacking machine feeding device sucks the battery cells. Its air pressure is high and can be blown directly into the gap to directly separate the battery cells. Under normal conditions, the battery cells can be separated (at this time, the battery cells will fall downward. Due to the low position difference between the battery cells and the symmetrical blowing, the upper end of the limit bar 11 is tilted to guide the position, so the position of the fallen battery cells will not shift). Therefore, the battery cell position accuracy is high, so that the size of the battery cell can be larger than required by 1-2mm. Compared with the existing technology, the overall waste of material is very small, and the material utilization rate is greatly improved.

[0129] At this time, the wind force of the wind knife 15 is strengthened, and the wind curtain generated can directly pass through the gaps between the battery cells, thereby separating the battery cells.

[0130] Compared with the existing technology, this patent uses an air knife 15 to separate the battery cells without setting up other structures. The overall cost is relatively low, and since there is a certain amount of space around it, it can be combined with some electronic instruments to further improve the accuracy.

[0131] There is a certain distance between the separation point and other battery cells, so it will not affect other battery cells.

[0132] The brush 16 is equivalent to auxiliary separation. When the battery cell rises, it will exert a downward force. When the battery cell is not separated, it will contact the battery cell below and sweep the battery cell down. It is the final means of separating the lithium battery cells and this step is not required normally.

[0133] Because the upper battery cells are sucked (there are many suction positions and they are relatively comprehensive), the bristles are in contact with the upper battery cells, which will not cause the upper battery cells to shake and will not cause powder loss. Compared with the existing situation where powder loss occurs seriously during battery cell loading, the lithium batteries produced by this method are better.

[0134] The present invention records a battery cell stacking material box, which records a separation component. The separation component uses an air knife 15 for multiple treatments to preliminarily separate the battery cells in the middle and upper parts, and increases air pressure at the suction part to completely separate the battery cells. In addition, the material rack 2 with precise size can avoid the situation where the position of the upper part of the battery cells is disordered during separation, and can ensure the accuracy of the battery cell position, thereby ensuring the quality of the lithium battery. It has good use effect and has good use prospects.

[0135] The multiple mechanisms in this patent complement each other and are indispensable. Only when they work together can the above-mentioned effects be achieved. Setting them up individually is better than the existing technology, but using them in combination will achieve better results.

[0136] It should be noted that the present invention provides a battery cell stacking material box, wherein the material rack 2 is mounted on a U-shaped fixing base 1 through a limiting device, and the U-shaped fixing base 1 is mounted on a lithium battery stacking machine. When in use, the jacking assembly is started and rises uniformly at a set speed to change the height of the battery cells, so that the height of the topmost battery cells is within a relatively constant range, which can facilitate the suction structure in the loading device of the lithium battery stacking machine to suck the battery cells;

[0137] When the lifting assembly is started, the rod motor 6 is started, which drives the lifting plate 8 to move upward at a constant speed. The lifting plate 8 drives the battery sheet to move and change the height of the battery sheet;

[0138] The wind knife 15 is activated once every cycle (the time required to raise the thickness of one battery cell). The air pressure of the wind knife 15 at the bottom is low, and the wind curtain it generates is aimed at the gaps between the battery cells, so that there are certain gaps at the edges of the battery cells. In this case, the overall position of the battery cells will not change, and will not affect the quality of the lithium battery.

[0139] The top wind knife 15 is started once every cycle, and its air pressure is high. The wind curtain it generates can blow directly into the gap, directly separating the battery cells that are stuck together. Under normal conditions, the battery cells can be separated (the two sets of wind curtains collide in the middle, generating downward and upward forces, which make the battery cells separate quickly. Because the upper battery cells are sucked at multiple points and the overall wind force is not strong, the upward and downward forces it generates are small, which will not affect the adsorbed battery cells. Moreover, because the downward force is small, the impact force generated when the lower battery cells fall is small, and at this time they are in the limited area of ​​the battery cells, and there will be no collision and deviation of the electrode sheets, which can greatly improve the accuracy of the battery cells).

[0140] The battery cells that are difficult to separate in some areas will come into contact with the brush member 16 during the rising process. When they rise to a certain height, the brush member 16 passes over the top battery cells and comes into contact with the battery cells that are attached together, applying downward force to the battery cells below, thereby separating the battery cells and effectively preventing the battery cells from adhering together (since most of the areas between the battery cells have been separated, the brush member 16 only needs to apply a very small force to separate the battery cells, and there will be no large deformation of the bristles, large force applied between the battery cells, and the battery cells will not deviate from their original positions. In addition, the service life of the brush member 16 is extended).

[0141] Finally, it should be noted that the above embodiments are merely examples for the purpose of illustrating the present invention and are not intended to limit the embodiments. Those skilled in the art will readily appreciate that other variations or modifications based on the above description are possible. It is not necessary and impossible to provide an exhaustive list of all embodiments. However, obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery cell stacking box, characterized in that: It is used in lithium battery stacking machines. The battery stacking box includes: A U-shaped fixing seat (1) is mounted on a lithium battery stacking machine; A limiting device, which is arranged on the inner bottom surface of the U-shaped fixing seat (1); A material rack (2) is detachably mounted on the U-shaped fixing seat (1) via a limiting device; A lifting assembly, which is mounted on a U-shaped fixing seat (1) and is used to change the height of the battery cells on the material rack (2); Wherein, the limiting device includes: There are two sets of guide assemblies, which are arranged on the inner bottom surface of the U-shaped fixing seat (1) near the two sides, and the material rack (2) moves along the guide assemblies; The guide assembly comprises: A guide wheel assembly (3) is mounted on the inner bottom surface of the U-shaped fixing seat (1) near the side end, and its outer surface is in contact with the side end surface of the material rack (2); A guide bar (4) is provided on one side of the guide wheel assembly (3); Wherein, a guide groove having a shape corresponding to the guide bar (4) is provided on the lower end surface of the material rack (2), and the guide groove slides along the guide bar (4); A pneumatic limiter, which is mounted on the inner bottom surface of the U-shaped fixing seat (1) and is used to limit the position of the material rack (2); The pneumatic limiting member comprises two groups of limiting cylinders (5) for limiting the front end position and the rear end position of the bottom of the material rack (2); the main bodies of the two groups of limiting cylinders (5) are both mounted on the lower end surface of the U-shaped fixing seat (1); limiting grooves are provided at the middle position of the front end surface and the middle position of the rear end surface of the material rack (2); and the telescopic ends of the limiting cylinders (5) are located inside the limiting grooves.

2. The battery cell stacking box according to claim 1, characterized in that: The jacking assembly includes: A rod motor (6) has a main body fixedly mounted on a U-shaped fixing seat (1), an upper end of a rod portion passes through an opening on the U-shaped fixing seat (1), and a metal sheet is fixedly mounted on a lower end surface of the rod portion; A mounting frame (7) is fixedly mounted on the lower end surface of the U-shaped fixing seat (1), and a plurality of proximity sensors for monitoring the position of the metal sheet are fixedly mounted on the outer surface of the mounting frame; A lifting plate (8) is fixedly mounted on the upper end of the rod body, and a light-sensitive sensor (9) for monitoring the presence of a battery cell is embedded and fixedly mounted in the middle of the upper end surface of the lifting plate.

3. The battery cell stacking box according to claim 2, characterized in that: The side end surface of the material rack (2) is provided with a plurality of groups of adjustment slots (10), and the adjustment slots (10) are provided with position-limiting bars (11) for limiting the position of the battery cells by means of bolts.

4. The battery cell stacking box according to claim 3, characterized in that: The lower end surface of the adjustment groove (10) and the side end of the upper end surface of the limiting block bar (11) are both provided with tooth structures, and the tooth structures on the limiting block bar (11) are meshed with the tooth structures on the lower end surface of the adjustment groove (10).

5. The battery cell stacking box according to claim 1, characterized in that: Two groups of separation components are installed on the U-shaped fixing seat (1) at the battery sheet unloading position, and the two groups of separation components are symmetrically arranged with the material rack (2) as the center.

6. The battery cell stacking box according to claim 5, characterized in that: The separation component comprises: An adjustment assembly mounted on the U-shaped fixing seat (1); An air box (12) is located inside the U-shaped fixing seat (1) and is connected to the adjustment assembly; The telescopic air pipe (13) has one end which is communicated with the interior of the air box (12).

7. The battery cell stacking box according to claim 6, characterized in that: The adjustment assembly comprises two groups of telescopic rods (14), the main bodies of which are fixedly mounted on a U-shaped fixing seat (1), and the telescopic ends of the telescopic rods (14) are fixedly connected to the air box (12).

8. The battery cell stacking box according to claim 7, characterized in that: The air box (12) is provided with a plurality of groups of air knives (15) for separating battery cells. The air pressure of the uppermost air knife (15) is greater than the air pressure of the other air knives (15). The upper end surface of the air box (12) is provided with a brush member (16) for applying downward pressure to the battery cells being separated.

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