Lamination device, manufacturing method of battery cell, battery and electric equipment

Abstract

The invention discloses a lamination device, a manufacturing method of a battery cell, a battery and electric equipment.The lamination device comprises a lamination table, a diaphragm traction mechanism, an auxiliary table, a cutting mechanism and a discharging mechanism, a diaphragm roll is arranged on the diaphragm traction mechanism, one end of the diaphragm roll is connected to the laminated battery cell of the lamination table, and the other end of the diaphragm roll is connected to the auxiliary table; the diaphragm traction mechanism can reciprocate between the first side and the second side of the lamination table in the width direction, the auxiliary table is located on the first side of the lamination table in the width direction and can ascend and descend in the height direction of the lamination table, and the cutting mechanism is located on the first side of the lamination table in the width direction and can ascend and descend in the height direction of the lamination table. And the discharging mechanism is used for moving the laminated battery core out of the lamination table.

Description

Technical Field

[0001] This application relates to the technical field of battery manufacturing, and particularly to a stacking device, a method for manufacturing a battery cell, a battery, and an electrical device using the same. Background Art

[0002] A battery cell is a main component of a battery. In the manufacturing of stacked battery cells, the "Z"-shaped stacking method is usually adopted. After the stacked battery cell is manufactured, the separator needs to be cut off to manufacture the next stacked battery cell.

[0003] In the related art, after the stacked battery cell is manufactured, first, a blanking mechanism is used to blank the stacked battery cell to move the stacked battery cell out of the stacking table. During the blanking process of the stacked battery cell by the blanking mechanism, the separator will be pulled and stacked on the stacking table. Then, the separator on the stacking table is fixed, and finally, a cutting mechanism is used to cut off the separator between the stacked battery cell and the stacking table so that the stacking table can manufacture the next stacked battery cell. However, during the process of the blanking mechanism clamping the stacked battery cell and moving it out of the stacking table, since the blanking mechanism fixes a part of the separator, when the separator is pulled and stacked on the stacking table, the separator will be wrinkled due to uneven stress, thus affecting the manufacturing quality of the stacked battery cell. Summary of the Invention

[0004] Aiming at the above deficiencies in the prior art, the present invention provides a stacking device, a method for manufacturing a battery cell, a battery, and an electrical device using the same, which can improve the manufacturing quality of stacked battery cells.

[0005] To solve the above technical problems, in a first aspect, the present invention provides a stacking device, including:

[0006] A stacking table for carrying the stacked battery cell;

[0007] A separator traction mechanism provided with a separator roll. One end of the separator roll is connected to the stacked battery cell on the stacking table, and the separator traction mechanism can reciprocate between a first side and a second side in the width direction of the stacking table;

[0008] An auxiliary table located on the first side in the width direction of the stacking table, and the auxiliary table can be lifted and lowered along the height direction of the stacking table;

[0009] A cutting mechanism located on the first side in the width direction of the stacking table, and the cutting mechanism can be lifted and lowered along the height direction of the stacking table;

[0010] A blanking mechanism for moving the stacked battery cell out of the stacking table.

[0011] In this application, after the laminated battery cells are laminated on the lamination table, the diaphragm traction mechanism moves to the first side in the width direction of the lamination table. The auxiliary table rises to a position level with the laminated battery cells and fixes the diaphragm between the diaphragm traction mechanism and the laminated battery cells. The cutting mechanism descends and cuts the diaphragm between the laminated battery cells and the auxiliary table. Then, the auxiliary table descends to a position level with the lamination table. The diaphragm traction mechanism drives the diaphragm to move to the second side of the lamination table and fixes the diaphragm between the diaphragm traction mechanism and the auxiliary table on the lamination table. The cutting mechanism cuts the diaphragm between the lamination table and the auxiliary table to start the lamination of the next laminated battery cell. It can be seen that in this application, the diaphragm is cut before the laminated battery cells on the lamination table are unloaded. One free end of the cut diaphragm covers the laminated battery cells, and the other free end is fixed by the auxiliary table. Therefore, during the process of the unloading mechanism driving the laminated battery cells out of the lamination table, there is no situation of pulling the diaphragm along the width direction of the lamination table to lay the diaphragm on the lamination table. That is to say, in this application, since it is not necessary for the unloading mechanism to move the laminated battery cells that have been laminated out of the lamination table before cutting the diaphragm between the lamination table and the auxiliary table, the situation where the diaphragm is wrinkled due to uneven clamping force on the diaphragm caused by the local clamping of the laminated battery cells by the unloading mechanism is avoided, and the preparation effect of the laminated battery cells is improved.

[0012] In addition, when the laminated battery cells on the lamination table are laminated, the diaphragm traction mechanism is located on the first side of the lamination table. When laminating the next laminated battery cell, the auxiliary table fixes the end of the cut diaphragm. First, the diaphragm traction mechanism moves along the width direction of the lamination table to the second side of the lamination table. During this process, a layer of diaphragm will be stacked on the lamination table. At this time, the diaphragm traction mechanism is located on the second side of the lamination table. Then, the cutting mechanism is used to cut the diaphragm between the lamination table and the auxiliary table. Synchronously, the lamination table will perform the production of the next laminated battery cell. It can be seen that on the one hand, when laminating the next laminated battery cell, there is no need to additionally set other structural components. Just by the cooperation of the auxiliary table and the diaphragm traction mechanism and making the diaphragm traction mechanism move along the width direction of the lamination table, the diaphragm can be stacked on the lamination table, which simplifies the process of the lamination device entering the production of the next laminated battery cell and simplifies the structure of the lamination device at the same time. On the other hand, when entering the lamination of the next laminated battery cell, the lamination of the laminated battery cells can be carried out on the lamination table, and the cutting mechanism synchronously cuts the diaphragm between the lamination table and the auxiliary table. In other words, this application can make the lamination action of the laminated battery cells and the processing action of the diaphragm be carried out synchronously, greatly reducing the production time of the laminated battery cells and improving the production efficiency of the laminated battery cells.

[0013] In a possible implementation manner, an auxiliary member is disposed on the auxiliary table so as to be liftable along the height direction of the lamination table, and when the auxiliary member moves close to the auxiliary table, it can press and fix the diaphragm.

[0014] By controlling the movement of the auxiliary member close to the auxiliary table, the diaphragm can be tightly pressed and fixed on the auxiliary table, with a simple structure and convenient operation.

[0015] In a possible implementation manner, along the width direction of the diaphragm, the width of the fit between the auxiliary table and the auxiliary member is greater than or equal to the width of the diaphragm.

[0016] Since the width of the fit between the auxiliary table and the auxiliary member is greater than or equal to the width of the diaphragm in the width direction of the diaphragm, when the auxiliary member moves close to the auxiliary table and presses the diaphragm against the auxiliary table, the whole of the diaphragm located between the auxiliary table and the auxiliary member can be squeezed by the auxiliary member, thus avoiding the situation where the diaphragm is unevenly stressed due to local squeezing of the diaphragm and causing wrinkles during the preparation of the next stacked battery cell, thereby improving the manufacturing quality of the stacked battery cell.

[0017] In a possible implementation manner, the stacking device further includes a waste collection structure disposed on the auxiliary table, and the waste collection structure is used to collect the cut diaphragm located on the auxiliary table.

[0018] In this way, by providing the waste collection structure, the cut diaphragm located on the auxiliary table can be removed in time, thus avoiding the interference of the cut diaphragm located on the auxiliary table with the treatment of the diaphragm on the subsequently prepared stacked battery cell and improving the manufacturing quality of the stacked battery cell.

[0019] In a possible implementation manner, the waste collection structure includes a suction member, a collection cavity disposed in the auxiliary table, and a collection port communicating with the collection cavity. The suction member communicates with the collection cavity, and the collection port is located on the surface of the auxiliary table for carrying the diaphragm.

[0020] Since the suction member communicates with the collection cavity and the collection port is located on the surface of the auxiliary table for carrying the diaphragm, when the diaphragm on the auxiliary table is cut, by controlling the suction member to suck the gas in the collection cavity to make the collection cavity in a negative pressure state, at this time, the collection port can suck the cut diaphragm on the auxiliary table into the collection cavity, thus completing the waste collection of the cut diaphragm on the auxiliary table. It can be seen that by providing a collection cavity in the auxiliary table and a collection port communicating with the collection cavity, part of the waste collection structure can be accommodated on the auxiliary table, thereby improving the compactness of the structure of the stacking device.

[0021] In a possible implementation manner, the auxiliary table includes a fixed clamp, and the fixed clamp can clamp and fix the diaphragm.

[0022] Since the fixed clamp has a simple structure and is convenient for design, the structural design of the stacking device can be simplified.

[0023] In a possible implementation, the laminating device further includes a pressing block that is vertically movable along the height direction of the laminating table. The pressing block is close to the auxiliary table. When the pressing block moves close to the laminating table, it can press the diaphragm on the laminating table or the diaphragm on the topmost layer of the laminated battery cell.

[0024] Thus, on the one hand, after the laminated battery cell is laminated, by pressing the diaphragm on the topmost layer of the laminated battery cell with the pressing block, the diaphragm between the laminated battery cell and the auxiliary table can be tightened, which is conducive to the cutting mechanism to cut off the diaphragm between the laminating table and the auxiliary table. On the other hand, when the next laminated battery cell is laminated on the laminating table and the diaphragm traction mechanism moves to the side of the laminating table away from the auxiliary table, there is a layer of diaphragm stacked on the laminating table. The pressing block can press and fix the layer of diaphragm stacked on the laminating table to prevent the diaphragm from floating when the positive electrode sheet or the negative electrode sheet is stacked on the diaphragm, which affects the production quality of the laminated battery cell.

[0025] In a possible implementation, the laminating device further includes a lifting mechanism. The lifting mechanism is arranged below the laminating table and is used to drive the laminating table to descend during the lamination process of the laminated battery cell and lift it to the initial position after the laminated battery cell is removed from the laminating table.

[0026] By controlling the lifting of the laminating table, the distance between the laminated battery cell and the diaphragm traction mechanism can be kept relatively constant, thus avoiding the interference between the diaphragm traction mechanism and the top of the laminated battery cell due to the reduction of the distance between the top of the laminated battery cell and the diaphragm traction mechanism in the height direction as the thickness of the laminated battery cell increases. At the same time, it also avoids setting the diaphragm traction mechanism too high in the height direction, which is not conducive to the compact design of the laminating device.

[0027] In a possible implementation, the laminating device further includes a control unit;

[0028] The control unit is electrically connected to the auxiliary table. The control unit is used to control the auxiliary table to move close to the diaphragm to fix the diaphragm between the laminating table and the diaphragm traction mechanism after the laminated battery cell is laminated;

[0029] The control unit is also electrically connected to the blanking mechanism. The control unit is used to control the blanking mechanism to clamp the laminated battery cell on the laminating table after the laminated battery cell is laminated;

[0030] The control unit is also electrically connected to the cutting mechanism. The control unit is used to control the cutting mechanism to cut off the diaphragm between the laminating table and the auxiliary table after the auxiliary table fixes the diaphragm and the blanking mechanism clamps the laminated battery cell;

[0031] The control unit is further configured to control the blanking mechanism to move the stacked battery cell out of the stacking table after the cutting mechanism cuts the separator.

[0032] Thus, by electrically connecting the control unit to the auxiliary table, the blanking mechanism, and the cutting mechanism respectively, the automation degree of the stacking device can be improved, thereby improving the production efficiency of the stacked battery cell.

[0033] In a possible implementation manner, the separator traction mechanism includes:

[0034] A first roller and a second roller, the first roller and the second roller are parallel and arranged along the width direction of the stacking table, and the separator passes through between the first roller and the second roller;

[0035] A driving member, the driving member is respectively connected to the first roller and the second roller, and is configured to simultaneously drive the first roller and the second roller to reciprocate along the width direction of the stacking table.

[0036] Since the separator traction mechanism includes the first roller and the second roller, and the separator passes through between the first roller and the second roller, the friction between the separator and the separator traction mechanism is rolling friction, thereby reducing the damage to the separator during the transmission and guiding processes, and improving the production quality of the stacked battery cell.

[0037] In a second aspect, the present invention further provides a method for manufacturing a battery cell, the manufacturing method is applied to the stacking device according to any one of the first aspect, and the manufacturing method includes:

[0038] Stacking a stacked battery cell on the stacking table;

[0039] After completing the stacking of the stacked battery cell, the separator traction mechanism is located on the first side of the stacking table in the width direction of the stacking table, and the auxiliary table fixes the separator between the stacking table and the separator traction mechanism;

[0040] The blanking mechanism clamps the stacked battery cell on the stacking table;

[0041] The cutting mechanism cuts the separator between the stacking table and the auxiliary table;

[0042] The blanking mechanism moves the stacked battery cell on the stacking table out of the stacking table;

[0043] The separator traction mechanism moves to the second side of the stacking table along the width direction of the stacking table;

[0044] The cutting mechanism cuts the separator between the stacking table and the auxiliary table.

[0045] Since the free end of the diaphragm is fixed to the auxiliary table, during the process that the diaphragm traction mechanism moves along the width direction of the stacking table to the side of the stacking table far from the auxiliary table, a layer of diaphragm can be stacked on the stacking table to enter the production of the next stacked battery cell, thus avoiding the additional addition of other structural components to lay the bottommost diaphragm on the stacking table, and simplifying the production process of the stacked battery cell. Synchronously, when the next stacked battery cell is stacked and produced on the stacking table, the cutting mechanism can cut off the diaphragm between the stacking table and the auxiliary table to cut off the redundant diaphragm connected to the next stacked battery cell. It can be seen that the stacking process of the stacked battery cell on the stacking table and the processing process of the diaphragm can be carried out synchronously, greatly shortening the production time of the stacked battery cell and improving the production efficiency of the stacked battery cell.

[0046] In a possible implementation manner, the stacking of the stacked battery cell on the stacking table includes;

[0047] Fix the diaphragm on the stacking table;

[0048] Move the negative electrode tab to the stacking table and stack it on the diaphragm on the stacking table;

[0049] Drive the diaphragm traction mechanism to move to the side of the stacking table close to the auxiliary table, so that the diaphragm covers the negative electrode tab;

[0050] Move the positive electrode tab to the stacking table and stack it on the diaphragm covering the negative electrode tab;

[0051] Drive the diaphragm traction mechanism to move to the side of the stacking table far from the auxiliary table, so that the diaphragm covers the positive electrode tab.

[0052] It can be seen that in this embodiment, by making the diaphragm traction mechanism reciprocate along the width direction of the stacking table, the diaphragm can be stacked in a "Z" shape on the stacking table, simplifying the design of the movement of the stacking table.

[0053] In a third aspect, the present invention further provides a battery, including:

[0054] A housing;

[0055] A battery cell, which is produced by the battery cell production method described in the second aspect, and the battery cell is installed in the housing;

[0056] A top cover, which covers the opening of the housing.

[0057] Since the battery cell in the battery is produced by the battery cell production method of the second aspect, the production efficiency of the battery and the service performance of the battery are improved.

[0058] Fourthly, the present invention further provides an electrical device, including the battery described in the third aspect.

[0059] Since the electrical device includes the battery of the third aspect, the performance of the electrical device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0061] Figure 1 Schematic structural diagram of the laminating device provided by the embodiment of the present invention;

[0062] Figure 2 A flowchart of the diaphragm cutting by the cutting mechanism in the laminating device provided by the embodiment of the present invention;

[0063] Figure 3 Another flowchart of the diaphragm cutting by the cutting mechanism in the laminating device provided by the embodiment of the present invention;

[0064] Figure 4 A third flowchart of the diaphragm cutting by the cutting mechanism in the laminating device provided by the embodiment of the present invention;

[0065] Figure 5 State diagram of the laminating device provided by the embodiment of the present invention when the auxiliary table does not fix the diaphragm;

[0066] Figure 6 Top view of the auxiliary table in the laminating device provided by the embodiment of the present invention;

[0067] Figure 7 Flowchart of the waste collection structure collecting the cut-off diaphragm in the embodiment of the present invention;

[0068] Figure 8 Schematic structural diagram of the pressing block pressing the diaphragm in the embodiment of the present invention;

[0069] Figure 9 Another schematic structural diagram of the pressing block pressing the diaphragm in the embodiment of the present invention;

[0070] Figure 10 Flowchart of the manufacturing method of the battery cell provided by the embodiment of the present invention;

[0071] Figure 11 Flowchart of manufacturing the battery cell on the laminating table in the embodiment of the present invention;

[0072] Figure 12 Structural schematic diagram of the battery provided by an embodiment of the present invention;

[0073] Figure 13 Structural schematic diagram of the electrical device provided by an embodiment of the present invention.

[0074] Explanation of reference numerals in the drawings:

[0075] 10 - laminated battery cell; 11 - separator;

[0076] 100 - laminating device; 110 - laminating table; 111 - bearing surface; 120 - separator traction mechanism; 121 - first roller; 122 - second roller; 131 - auxiliary table; 132 - auxiliary member; 140 - cutting mechanism; 150 - blanking mechanism; 160 - pressing block; 170 - waste collection structure; 171 - collection cavity; 172 - collection port;

[0077] 200 - battery; 210 - housing; 220 - battery cell; 230 - top cover;

[0078] 300 - electrical device. Detailed implementation manners

[0079] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0080] In the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0081] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0082] In addition, the terms "mounted", "set up", "provided with", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or an internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0084] The present application will be described in detail below through specific embodiments:

[0085] See Figure 1 、 Figure 2 and Figure 3 , an embodiment of the present application provides a lamination device 100, which includes a lamination table 110, a diaphragm traction mechanism 120, an auxiliary table 131, a cutting mechanism 140, and a blanking mechanism 150. Among them, the lamination table 110 is used to carry the laminated battery cell 10; a diaphragm roll is provided on the diaphragm traction mechanism 120, one end of the diaphragm roll is connected to the laminated battery cell 10 on the lamination table 110, and the diaphragm traction mechanism 120 can reciprocate between the first side and the second side in the width direction of the lamination table 110; the auxiliary table 131 is located on the first side in the width direction of the lamination table 110, and the auxiliary table 131 can be lifted and lowered along the height direction of the lamination table 110, and can fix the diaphragm 11 when the auxiliary table 131 moves close to the diaphragm 11; the cutting mechanism 140 is located on the first side in the width direction of the lamination table 110, the cutting mechanism 140 can be lifted and lowered along the height direction of the lamination table 110, and the blanking mechanism 150 is used to move the laminated battery cell 10 out of the lamination table 110.

[0086] Among them, the above-mentioned lamination table 110 is used to carry the laminated battery cell 10. It should be understood that the lamination table 110 has a bearing surface 111, and the laminated battery cell 10 carried by the bearing surface 111 includes a layer of diaphragm 11, a partially laminated diaphragm 11, a positive electrode plate and a negative electrode plate, and a laminated battery cell 10 that has been laminated. The width direction of the above-mentioned lamination table refers to Figure 1 the direction indicated by the X arrow in Figure 1 and the height direction of the above-mentioned lamination table 110 refers to

[0087] In addition, the above-mentioned diaphragm traction mechanism 120 can reciprocate between the first side and the second side in the width direction of the stacking table 110. It should be understood that when the diaphragm traction mechanism 120 reciprocates in the width direction of the stacking table, the diaphragm 11 can be stacked on the stacking table 110 in a "Z" shape during the stacking process of the stacked battery cell 10.

[0088] In addition, the auxiliary table 131 can fix the diaphragm between the stacking table 110 and the diaphragm traction mechanism 120. The specific fixing methods include that an adsorption surface is provided on the auxiliary table 131, and the diaphragm is fixed by adsorption through the adsorption surface, or a structural member that can be lifted relative to the auxiliary table is provided on the auxiliary table 131 to fix the diaphragm when the two are in mutual contact.

[0089] Based on the above embodiments, after the stacked battery cell 10 is stacked on the stacking table 110, the diaphragm traction mechanism 120 moves to the first side in the width direction of the stacking table 110, the auxiliary table 131 rises to a position equal to the height of the stacked battery cell 10 and fixes the diaphragm 11 between the diaphragm traction mechanism 120 and the stacked battery cell 10. The cutting mechanism 140 descends and cuts off the diaphragm 11 between the stacked battery cell 10 and the auxiliary table 131. Then the auxiliary table 131 descends to a position equal to the height of the stacking table 110. The diaphragm traction mechanism 120 drives the diaphragm 11 to move to the second side in the width direction of the stacking table 110, and fixes the diaphragm 11 between the diaphragm traction mechanism 120 and the auxiliary table 131 on the stacking table 110. The cutting mechanism 140 cuts off the diaphragm 11 between the stacking table 110 and the auxiliary table 131 to start the stacking of the next stacked battery cell 10.

[0090] It can be seen that in this embodiment, the diaphragm 11 is cut before the stacked battery cell 10 on the stacking table 110 is unloaded. One free end of the cut diaphragm 11 covers the stacked battery cell 10, and the other free end is fixed by the auxiliary table 131. Therefore, during the process of the unloading mechanism 150 driving the stacked battery cell 10 out of the stacking table 110, there is no situation of pulling the diaphragm 11 in the width direction of the stacking table to make the diaphragm 11 laid on the stacking table 110. That is to say, in this embodiment, since it is not necessary for the unloading mechanism 150 to move the stacked battery cell after stacking out of the stacking table 110 before the diaphragm 11 between the stacking table 110 and the auxiliary table 131 is cut, the situation that the unloading mechanism 150 causes uneven clamping force on the diaphragm 11 due to locally clamping the stacked battery cell 10 and resulting in wrinkles is avoided, thereby improving the quality of the stacked battery cell 10.

[0091] Of course, as Figure 3 shown, it can also be that after the cutting mechanism 140 cuts off the diaphragm 11 between the stacking table 110 and the auxiliary table 131, the unloading mechanism 150 moves the stacked battery cell 10 out of the stacking table 110.

[0092] In addition, referring to Figure 4, when the stacked battery cell 10 on the stacking table 110 is completed, the diaphragm traction mechanism 120 is located on the first side of the auxiliary table 131. When performing the next stacking of the battery cell 10, the auxiliary table 131 fixes the end of the cut diaphragm 11. First, the diaphragm traction mechanism 120 moves along the width direction of the stacking table towards the second side of the stacking table 110 until a layer of diaphragm 11 is stacked on the stacking table 110. At this time, the diaphragm traction mechanism 120 is located on the second side of the stacking table 110. Then, the cutting mechanism 140 cuts the diaphragm 11 located between the stacking table 110 and the auxiliary table 131. Synchronously, the stacking table 110 will perform the production of the next stacked battery cell 10. It can be seen that, on the one hand, when performing the next stacking of the battery cell 10, no additional structural components need to be set up. Only by the cooperation of the auxiliary table 131 and the diaphragm traction mechanism 120, and making the diaphragm traction mechanism 120 move along the width direction of the stacking table, the diaphragm 11 can be stacked on the stacking table 110, which simplifies the process of the stacking device 100 entering the production of the next stacked battery cell 10 and simplifies the structure of the stacking device 100. On the other hand, when entering the next stacking of the battery cell 10, the stacking of the battery cell 10 can be performed on the stacking table 110, and the cutting mechanism 140 synchronously cuts the diaphragm 11 between the stacking table 110 and the auxiliary table 131. In other words, this embodiment can make the stacking action of the stacked battery cell 10 and the processing action of the diaphragm 11 be carried out synchronously, greatly reducing the production time of the stacked battery cell 10 and improving the production efficiency of the stacked battery cell 10.

[0093] In addition, in the related art, the feeding mechanisms for the positive electrode tab and the negative electrode tab are respectively located on the opposite sides of the stacking table 110 in the width direction of the stacking table, that is, the first side and the second side. Taking the example where the uppermost tab and the lowermost tab of the stacked battery cell 10 are both negative electrode tabs, when the stacking of the negative electrode tab on the uppermost layer of the stacked battery cell 10 is completed, it is necessary to move the diaphragm traction mechanism 120 towards the feeding mechanism for the negative electrode tab until the negative electrode tab is covered. At this time, the diaphragm traction mechanism 120 is located on the side of the stacking table 110 facing the feeding mechanism for the negative electrode tab. When the feeding mechanism 150 removes the stacked battery cell 10 from the stacking table 110, it will pull the diaphragm 11, causing the diaphragm 11 to stack one layer on the stacking table 110, and then the diaphragm 11 can be cut. When manufacturing the next stacked battery cell 10, in order to stack the negative electrode tab at the lowermost layer, it is necessary to move the diaphragm traction mechanism 120 towards the feeding mechanism for the positive electrode tab until it is located on the side of the stacking table 110 facing the feeding mechanism for the positive electrode tab before the stacking of the negative electrode tab can be carried out. That is to say, there are two layers of diaphragm 11 on the lowermost layer of the stacked battery cell 10, which means that there is one extra layer of diaphragm 11 at the lowermost layer of the battery cell 10, resulting in waste of the diaphragm 11. In the embodiments of the present application, by providing the auxiliary table 131, not only can the diaphragm 11 between the stacking table 110 and the stacking fixing mechanism be cut before the stacked battery cell 10 is removed from the stacking table 110, but also because the auxiliary table 131 fixes the end of the cut diaphragm 11, when the diaphragm traction mechanism 120 moves towards the stacking table 110 along the width direction of the stacking table during the manufacturing of the next stacked battery cell 10, a layer of diaphragm 11 can be stacked on the stacking table 110, thus avoiding the stacking of an extra layer of diaphragm 11 on the stacking table 110, achieving the purpose of saving the diaphragm 11 material and improving the utilization rate of materials.

[0094] It should be noted that the cutting mechanism 140 in this embodiment needs to cut the diaphragm 11 between the stacking table 110 and the auxiliary table 131 after the stacked battery cell 10 on the stacking table 110 is completed, and also needs to cut the diaphragm 11 between the stacking table 110 and the auxiliary table 131 when the next stacked battery cell 10 is manufactured after the stacked battery cell 10 on the stacking table 110 is removed. That is to say, after the stacked battery cell 10 on the stacking table 110 is manufactured and before the next stacked battery cell 10 is manufactured, the cutting mechanism 140 will cut the diaphragm 11 between the stacking table 110 and the auxiliary table 131 twice.

[0095] In some possible embodiments, refer to Figure 5 , an auxiliary member 132 is provided on the auxiliary table 131 so as to be liftable along the height direction of the stacking table 110. When the auxiliary member 132 moves closer to the auxiliary table 131, it can press and fix the diaphragm 11.

[0096] Among them, the auxiliary member 132 can be structures such as a pressing plate, a pressing strip, or a pressing block.

[0097] In this embodiment, by controlling the auxiliary member 132 to move closer to the auxiliary table 131, the diaphragm 11 can be pressed and fixed on the auxiliary table 131, with a simple structure and convenient operation.

[0098] In some possible embodiments, refer to Figure 6 , along the width direction of the diaphragm 11, the width of the fit between the auxiliary table 131 and the auxiliary member 132 is greater than or equal to the width of the diaphragm 11.

[0099] Among them, the width direction of the diaphragm 11 refers to the direction perpendicular to the length direction of the diaphragm 11, that is, Figure 6 the direction indicated by the Y arrow in

[0100] Since the width of the fit between the auxiliary table 131 and the auxiliary member 132 is greater than or equal to the width of the diaphragm 11 in the width direction of the diaphragm 11, when the auxiliary member 132 moves closer to the auxiliary table 131 and presses the diaphragm 11 onto the auxiliary table 131, the whole of the diaphragm 11 located between the auxiliary table 131 and the auxiliary member 132 can be squeezed by the auxiliary member 132, thus avoiding the situation where the diaphragm 11 is unevenly stressed due to local squeezing of the diaphragm 11 and wrinkles occur during the preparation of the next stacked battery cell 10, thereby improving the manufacturing quality of the stacked battery cell 10.

[0101] The auxiliary table 131 is not limited to the structures of the above-mentioned auxiliary table 131 and auxiliary member 132. In some other possible embodiments, the auxiliary table 131 includes a fixing clip that can clamp and fix the diaphragm 11.

[0102] Among them, the fixing clip has a first clamping portion and a second clamping portion that are oppositely arranged and rotate towards or away from each other. When the first clamping portion and the second clamping portion rotate towards each other until the opposite surfaces of the first clamping portion and the second clamping portion are in contact, the diaphragm 11 can be clamped and fixed.

[0103] In addition, since the fixing clip has a simple structure and is convenient for design, the structural design of the stacking device 100 can be simplified.

[0104] Of course, in some other possible embodiments, the diaphragm 11 can also be fixed by adsorption. For example, adsorption holes are provided on the surface of the auxiliary table 131 facing the diaphragm 11, and the diaphragm 11 can be adsorbed and fixed on this surface.

[0105] When the lamination table 110 manufactures the next laminated battery cell 10, the separator traction mechanism 120 moves towards the lamination table 110 to a position on the side of the lamination table 110 away from the auxiliary table 131. At this time, a layer of separator 11 will be stacked on the lamination table 110, and a section of the separator 11 facing the auxiliary table 131 extends out of the lamination table 110 and is fixed to the auxiliary table 131. And this section of the separator 11 fixed to the auxiliary table 131 will not be used in the next laminated battery cell 10. That is to say, this section of the separator 11 belongs to the redundant part. Therefore, in order to ensure the manufacturing quality of the laminated battery cell 10, this section of the separator 11 needs to be removed. That is what is mentioned in the above embodiment, using the cutting mechanism 140 to cut off the separator 11 between the lamination table 110 and the auxiliary table 131. After cutting, the separator 11 located on the auxiliary table 131 needs to be cleaned in time to avoid interference when the auxiliary table 131 fixes other separators 11. In some possible embodiments, see Figure 7 , the lamination device 100 further includes a waste collection structure 170 provided on the auxiliary table 131, and the waste collection structure 170 is used to collect the cut separator 11 located on the auxiliary table 131.

[0106] In this way, by setting the waste collection structure 170, the cut separator 11 located on the auxiliary table 131 can be removed in time, thereby avoiding the interference of the cut separator 11 located on the auxiliary table 131 to the treatment of the separator 11 on the subsequently prepared laminated battery cell 10, and improving the manufacturing quality of the laminated battery cell 10.

[0107] There are various waste collection structures 170. In some possible structures, see Figure 7 , the waste collection structure 170 includes a suction member, a collection cavity 171 provided in the auxiliary table 131, and a collection port 172 communicating with the collection cavity 171. The suction member communicates with the collection cavity 171, and the collection port 172 is located on the surface of the auxiliary table 131 for carrying the separator 11.

[0108] Since the suction member communicates with the collection cavity 171 and the collection port 172 is located on the surface of the auxiliary table 131 for carrying the separator 11, when the separator 11 on the auxiliary table 131 is cut off, by controlling the suction member to suck the gas in the collection cavity 171 to make the collection cavity 171 in a negative pressure state. At this time, the collection port 172 can suck the cut separator 11 on the auxiliary table 131 into the collection cavity 171, thereby completing the waste collection of the cut separator 11 on the auxiliary table 131. It can be seen that by providing the collection cavity 171 and the collection port 172 communicating with the collection cavity 171 in the auxiliary table 131, part of the waste collection structure 170 can be accommodated on the auxiliary table 131, thereby improving the compactness of the structure of the lamination device 100.

[0109] In some other possible structures, the waste collection structure 170 includes a negative pressure machine, and an air extraction port is provided on the surface of the auxiliary table 131 for carrying the diaphragm 11. The negative pressure port of the negative pressure machine is communicated with the air extraction port. When the negative pressure machine operates, the diaphragm 11 can be collected successively through the air extraction port and the negative pressure port.

[0110] In some possible embodiments, referring to Figure 8 and Figure 9 , the laminating device 100 further includes a pressing block 160 that is vertically movable along the height direction of the laminating table 110. When the pressing block 160 moves closer to the laminating table 110, it can press the diaphragm 11 on the laminating table 110 or the diaphragm 11 on the topmost layer of the laminated battery cell 10.

[0111] Thus, by providing the pressing block 160, on the one hand, after the laminated battery cell 10 is laminated, by pressing the diaphragm 11 on the topmost layer of the laminated battery cell 10 with the pressing block 160, the diaphragm 11 between the laminated battery cell 10 and the auxiliary table 131 can be tightened, which is beneficial for the cutting mechanism 140 to cut the diaphragm 11 between the laminating table 110 and the auxiliary table 131. On the other hand, when the next laminated battery cell 10 is laminated on the laminating table 110 and the diaphragm traction mechanism 120 moves to the side of the laminating table 110 away from the auxiliary table 131, there is a layer of diaphragm 11 stacked on the laminating table 110. The pressing block 160 can press and fix the layer of diaphragm 11 stacked on the laminating table 110, avoiding the floating of the diaphragm 11 when the positive electrode plate or the negative electrode plate is stacked on the diaphragm 11 and affecting the production quality of the laminated battery cell 10.

[0112] In some possible embodiments, the laminating device 100 further includes a lifting mechanism, which is arranged below the laminating table 110 and is used to drive the laminating table 110 to descend during the lamination process of the laminated battery cell 10 and lift it to the initial position after the laminated battery cell 10 is removed from the laminating table 110.

[0113] Among them, the lifting mechanism can be a lifting cylinder, a lifting hydraulic cylinder, etc.

[0114] When laminating the laminated battery cell 10 on the laminating table 110, as the thickness of the laminated battery cell 10 increases, the lifting mechanism drives the lifting table to descend to facilitate the stacking of the diaphragm 11. After the laminated battery cell 10 on the laminating table 110 is removed from the laminating table 110, the lifting mechanism controls the laminating table 110 to lift to the initial position to prepare for the preparation of the next laminated battery cell 10.

[0115] It can be seen that by controlling the lifting of the stacking table 110, the distance between the stacked battery cells 10 and the diaphragm traction mechanism 120 can be kept relatively constant, thereby avoiding the interference between the diaphragm traction mechanism 120 and the top of the stacked battery cells 10 due to the reduction of the distance in the height direction between the top of the stacked battery cells 10 and the diaphragm traction mechanism 120 as the thickness of the stacked battery cells 10 increases. At the same time, it also avoids setting the diaphragm traction mechanism 120 too high in the height direction, which is not conducive to the compact design of the stacking device 100.

[0116] In some possible embodiments, the stacking device 100 further includes a control unit; the control unit is electrically connected to the auxiliary table 131, and the control unit is used to control the auxiliary table 131 to move close to the diaphragm 11 after the stacked battery cells 10 are stacked to fix the diaphragm 11 between the stacking table 110 and the diaphragm traction mechanism 120; the control unit is electrically connected to the blanking mechanism 150, and the control unit is used to control the blanking mechanism 150 to clamp the stacked battery cells 10 on the stacking table 110 after the stacked battery cells 10 are stacked; the control unit is electrically connected to the cutting mechanism 140, and the control unit is used to control the cutting mechanism 140 to cut off the diaphragm 11 between the stacking table 110 and the auxiliary table 131 after the auxiliary table 131 fixes the diaphragm 11 and the blanking mechanism 150 clamps the stacked battery cells 10; the control unit is further used to control the blanking mechanism 150 to move the stacked battery cells 10 out of the stacking table 110 after the cutting mechanism 140 cuts off the diaphragm 11.

[0117] Wherein, the control unit can be a controller, a control chip or an industrial computer, etc.

[0118] Thus, by electrically connecting the control unit to the auxiliary table 131, the blanking mechanism 150 and the cutting mechanism 140 respectively, the automation degree of the stacking device 100 can be improved, thereby improving the production efficiency of the stacked battery cells 10.

[0119] In some possible embodiments, referring to Figure 8 and Figure 9 , the film guiding mechanism includes a first roller 121, a second roller 122 and a driving member. Among them, the first roller 121 and the second roller 122 are parallel and arranged along the width direction of the stacking table, and the diaphragm 11 passes between the first roller 121 and the second roller 122; the driving member is respectively connected to the first roller 121 and the second roller 122, and is used to drive the first roller 121 and the second roller 122 to reciprocate along the width direction of the stacking table at the same time.

[0120] Since the diaphragm traction mechanism 120 includes a first roller 121 and a second roller 122, and the diaphragm 11 passes between the first roller 121 and the second roller 122, the friction between the diaphragm 11 and the diaphragm traction mechanism 120 is rolling friction, thereby reducing the damage to the diaphragm 11 during the transmission and guiding process, and improving the production quality of the stacked battery cells 10.

[0121] See Figure 10 Moreover, an embodiment of the present application further provides a method for manufacturing an electric core. The manufacturing method is applied to the laminating device in the above embodiment, and the manufacturing method includes the following steps:

[0122] S100. Laminating the laminated electric core on the laminating table.

[0123] S200. After the lamination of the laminated electric core is completed, the diaphragm traction mechanism is located on the first side of the laminating table in the width direction of the laminating table, and the auxiliary table moves close to the diaphragm and fixes the diaphragm between the laminating table and the diaphragm traction mechanism.

[0124] S300. The blanking mechanism clamps the laminated electric core on the laminating table.

[0125] S400. The cutting mechanism cuts off the diaphragm between the laminating table and the auxiliary table.

[0126] S500. The blanking mechanism moves the laminated electric core on the laminating table out of the laminating table.

[0127] S600. The diaphragm traction mechanism moves along the width direction of the laminating table to the second side of the laminating table.

[0128] S700. The cutting mechanism cuts off the diaphragm between the laminating table and the auxiliary table.

[0129] Since the free end of the diaphragm is fixed to the auxiliary table, during the process that the diaphragm traction mechanism moves along the width direction of the laminating table to the side of the laminating table away from the auxiliary table, a layer of diaphragm can be stacked on the laminating table to enter the production of the next laminated electric core, thereby avoiding adding additional structural components to lay the bottommost diaphragm on the laminating table, and simplifying the manufacturing process of the laminated electric core. Synchronously, when the next laminated electric core is laminated on the laminating table, the cutting mechanism can cut off the diaphragm between the laminating table and the auxiliary table to cut off the redundant diaphragm connected to the next laminated electric core. It can be seen that the lamination process of the laminated electric core on the laminating table and the processing process of the diaphragm can be carried out synchronously, greatly shortening the manufacturing time of the laminated electric core and improving the manufacturing efficiency of the laminated electric core.

[0130] Between step S200 and step S300, the manufacturing method further includes controlling the pressing block to press the diaphragm on the laminating table to facilitate the cutting of the diaphragm between the laminating table and the auxiliary table by the cutting mechanism. At this time, the diaphragm between the laminating table and the auxiliary table can be cut first, and when the diaphragm is cut, the laminated electric core on the laminating table can be clamped.

[0131] See Figure 11 Moreover, in some possible embodiments, step S100 includes;

[0132] S110. Fix the separator on the stacking table.

[0133] S120. Move the negative electrode sheet to the stacking table and stack it on the separator on the stacking table.

[0134] S130. Drive the separator traction mechanism to move to one side of the stacking table close to the auxiliary table so that the separator covers the negative electrode sheet.

[0135] S140. Move the positive electrode sheet to the stacking table and stack it on the separator covering the negative electrode sheet.

[0136] S150. Drive the separator traction mechanism to move to the side of the stacking table away from the auxiliary table so that the separator covers the positive electrode sheet.

[0137] It can be seen that in this embodiment, by making the separator traction mechanism reciprocate along the width direction of the stacking table, the separator can be stacked on the stacking table in a "Z" shape, simplifying the design of the movement of the stacking table.

[0138] See Figure 12 , this embodiment of the present application also provides a battery 200, which includes a housing 210, an electric core 220 and a top cover 230. Among them, the electric core 220 is manufactured by the manufacturing method of the electric core in the above embodiment, and the electric core 220 is installed in the housing 210; the top cover 230 covers the opening of the housing 210.

[0139] Since the electric core 220 in the battery 200 is manufactured by the manufacturing method of the electric core in the above embodiment, the manufacturing efficiency of the battery 200 and the service performance of the battery 200 are improved.

[0140] See Figure 13 , this embodiment also provides an electrical device 300, including the battery 200 in the above embodiment.

[0141] In this embodiment, the battery 200 in the electrical device 300 is the battery 200 in the above embodiment. Therefore, the battery 200 in this embodiment has the technical effects of the battery 200 in the above embodiment. Since the technical effects of the battery 200 have been fully described in the embodiment, they will not be elaborated here.

[0142] Among them, the electrical equipment 300 can be any one of an energy storage cabinet, an energy storage box, an electric vehicle, a ship, a spacecraft, etc., and is not limited herein. For example, the electrical equipment 300 can be a small energy storage box applied to household energy storage. At this time, the electrical equipment 300 can supply power to lighting lamps, refrigerators, etc.; alternatively, the electrical equipment 300 can be an energy storage power station applied to the wind power and photovoltaic power station sides, which can convert wind energy and light energy into electrical energy and store it in the energy storage power station, and can supply the stored electrical energy to the power consumption side through the power grid; of course, the electrical equipment 300 can also be applied to other scenarios, which are not limited herein either.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lamination device, characterized in that, include: A lamination table, which is used to carry laminated battery cells; a diaphragm pulling mechanism, wherein the diaphragm pulling mechanism is provided with a diaphragm roll, one end of the diaphragm roll is connected to the laminated core of the lamination table, and the diaphragm pulling mechanism can reciprocate between a first side and a second side in the width direction of the lamination table; an auxiliary platform, the auxiliary platform being located on a first side in a width direction of the laminating platform and being movable up and down along a height direction of the laminating platform; a cutting mechanism, the cutting mechanism being located on a first side in a width direction of the laminating platform and being movable up and down along a height direction of the laminating platform; A blanking mechanism is used to move the laminated battery core out of the lamination table.

2. The lamination device according to claim 1, characterized in that, An auxiliary part is provided on the auxiliary platform in a liftable manner along the height direction of the laminating platform. When the auxiliary part moves close to the auxiliary platform, the diaphragm can be pressed and fixed.

3. The lamination device according to claim 2, characterized in that, Along the width direction of the diaphragm, the width of the fitting between the auxiliary platform and the auxiliary component is greater than or equal to the width of the diaphragm.

4. The lamination device according to claim 2, characterized in that, The lamination device further comprises a waste collection structure provided on the auxiliary table, wherein the waste collection structure is used for collecting the cut diaphragms located on the auxiliary table.

5. The lamination device according to claim 4, characterized in that, The waste collection structure includes a suction piece, a collection cavity provided in the auxiliary platform, and a collection port communicating with the collection cavity. The suction piece is communicated with the collection cavity. The collection port is located on the surface of the auxiliary platform for supporting the diaphragm.

6. The lamination device according to any one of claims 1 to 5, characterized in that The lamination device also includes a pressing block that can be raised and lowered along the height direction of the lamination table. When the pressing block moves close to the lamination table, it can press the diaphragm on the lamination table or the diaphragm on the top layer of the laminated battery cell.

7. The lamination device according to any one of claims 1 to 5, characterized in that, The stacking device further includes a lifting mechanism, which is disposed below the stacking table and is configured to drive the stacking table downward during stacking of the stacked cells and to lift the stacking table to an initial position after the stacked cells are moved out of the stacking table.

8. The lamination device according to any one of claims 1 to 5, characterized in that, The lamination device further includes a control unit; The control unit is electrically connected to the auxiliary table, and the control unit is used to control the auxiliary table to move close to the diaphragm after the stacking of the stacked battery cores is completed to fix the diaphragm between the stacking table and the diaphragm traction mechanism; The control unit is also electrically connected to the unloading mechanism, and the control unit is used to control the unloading mechanism to clamp the laminated battery core on the lamination table after the laminated battery core is completed; The control unit is also electrically connected to the cutting mechanism, and is used to control the cutting mechanism to cut off the diaphragm between the stacking table and the auxiliary table after the auxiliary table fixes the diaphragm and the blanking mechanism clamps the laminated battery core; The control unit is further configured to control the unloading mechanism to move the laminated battery core out of the lamination table after the cutting mechanism cuts off the diaphragm.

9. The lamination device according to any one of claims 1 to 5, characterized in that, The diaphragm traction mechanism comprises: a first roller and a second roller, wherein the first roller and the second roller are parallel to each other and arranged along the width direction of the lamination table, and the diaphragm passes between the first roller and the second roller; A driving member, which is respectively connected to the first roller and the second roller, and is used to drive the first roller and the second roller to reciprocate in the width direction of the stacking table simultaneously.

10. A method for manufacturing an electric core, characterized in that, The manufacturing method is applied to the stacking device according to any one of claims 1 to 9, and the manufacturing method includes: Stacking the laminated battery cells on the stacking table; After the stacking of the laminated battery cells is completed, the diaphragm traction mechanism is located on the first side of the stacking table in the width direction of the stacking table, and the auxiliary table moves close to the diaphragm and fixes the diaphragm between the stacking table and the diaphragm traction mechanism; The blanking mechanism clamps the laminated battery cells on the stacking table; The cutting mechanism cuts off the diaphragm between the stacking table and the auxiliary table; The blanking mechanism moves the laminated battery cells on the stacking table out of the stacking table; The diaphragm traction mechanism moves along the width direction of the stacking table to the second side of the stacking table; The cutting mechanism cuts off the diaphragm between the stacking table and the auxiliary table.

11. The manufacturing method according to claim 10, characterized in that, The stacking of the laminated battery cells on the stacking table includes; Fixing the diaphragm on the stacking table; Moving the negative electrode plate to the stacking table and stacking it on the diaphragm on the stacking table; Driving the diaphragm traction mechanism to move to the first side of the stacking table so that the diaphragm covers the negative electrode plate; Moving the positive electrode plate to the stacking table and stacking it on the diaphragm covering the negative electrode plate; Driving the diaphragm traction mechanism to move to the second side of the stacking table so that the diaphragm covers the positive electrode plate.

12. A battery, characterized in that, Comprising: A housing; A battery cell, which is manufactured by the manufacturing method of the battery cell according to claim 10 or 11, and the battery cell is installed in the housing; A top cover, which covers the opening of the housing.

13. An electrical device, characterized in that, Including the battery according to claim 12.

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