Diaphragm z-shaped lamination structure and application thereof

Abstract

The application discloses a diaphragm Z-shaped lamination structure and application thereof. The diaphragm Z-shaped lamination structure comprises a laminated body, which comprises a diaphragm bottom layer, a bottom layer separator, a first bottom layer pole piece, a diaphragm sub-bottom layer and a bottom layer winding part. The diaphragm bottom layer and the diaphragm sub-bottom layer are arranged in a laminated mode, the first bottom layer pole piece is located between the diaphragm bottom layer and the diaphragm sub-bottom layer, the bottom layer separator is located between the diaphragm bottom layer and the first bottom layer pole piece, the bottom layer winding part is connected to the same side of the diaphragm bottom layer and the diaphragm sub-bottom layer, and the bottom layer winding part has a bottom layer breaking position for breaking, so that the diaphragm bottom layer and the bottom layer separator are separated from the first bottom layer pole piece. The alignment of the pole pieces in the outer package battery can be improved, and the process yield is improved. The application is applied to the field of lamination manufacturing.

Description

Technical Field

[0001] This invention relates to the field of laminate fabrication, and particularly to a diaphragm Z-shaped laminate structure and its application. Background Technology

[0002] Lamination is a common manufacturing process for battery cells. The laminated body after lamination is divided into the following two types: one is a separator outer lamination, in which the separator covers all the electrodes, and the other is an electrode outer lamination, in which the electrodes are located on the outermost layer of the laminate.

[0003] In related technologies, the manufacturing process of the electrode outer sheath laminate is as follows: First, electrodes are stacked to form a diaphragm outer sheath laminate; then, the diaphragm outer sheath laminate is transferred to a hot pressing station; finally, at the hot pressing station, the outermost electrode is stacked on the outer peripheral surface of the diaphragm outer sheath laminate and hot-pressed to form the electrode outer sheath laminate. However, because the outermost electrode of the electrode outer sheath laminate and the electrode of the diaphragm outer sheath laminate are positioned at different locations, the alignment between the outermost electrode and the inner electrode of the diaphragm outer sheath laminate is poor, resulting in a low process yield. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a diaphragm Z-shaped stacked structure, which can improve the alignment of the inner electrode sheets of the outer battery cell, thereby improving the process yield.

[0005] A battery cell with the aforementioned diaphragm Z-shaped stacked structure is also proposed.

[0006] A method for fabricating electrode sheets by wrapping and stacking is also proposed.

[0007] A diaphragm Z-shaped stacking device was also proposed.

[0008] According to a first aspect of the present invention, a diaphragm Z-shaped stacked structure includes: a laminated body including a diaphragm bottom layer, a bottom layer spacer, a first bottom layer electrode, a diaphragm sublayer, and a bottom layer winding portion. The diaphragm bottom layer and the diaphragm sublayer are stacked together. The first bottom layer electrode is located between the diaphragm bottom layer and the diaphragm sublayer. The bottom layer spacer is located between the diaphragm bottom layer and the first bottom layer electrode to isolate the diaphragm bottom layer and the first bottom layer electrode. The bottom layer winding portion is connected to the same side of the diaphragm bottom layer and the diaphragm sublayer. The bottom layer winding portion has a bottom layer break position for breakage to separate the diaphragm bottom layer and the bottom layer spacer relative to the first bottom layer electrode.

[0009] According to the first aspect of the present invention, the diaphragm Z-shaped stacked structure has at least the following beneficial effects: after the laminated bodies are stacked and hot-pressed, the laminated bodies are bonded together as one unit. However, because the bottom layer spacer isolates the bottom layer of the diaphragm and the first bottom layer electrode, the bottom layer of the diaphragm and the first bottom layer electrode are still in a separated state after hot pressing. After the bottom layer fracture position of the broken bottom layer winding part is broken, the bottom layer of the diaphragm and the laminated body can be directly separated, so that the bottom layer of the electrode is exposed to form an electrode outer-coated cell. The laminated body is formed in one step at the stacking station, the alignment of the electrode in the laminated body is high, and the yield of the electrode outer-coated laminated body is higher.

[0010] According to some embodiments of the present invention, the bottom winding portion includes a connecting section, a winding section, and an auxiliary cutting section. The connecting section is connected to the bottom layer of the diaphragm and the winding section. The auxiliary cutting section is connected to the second bottom layer of the diaphragm and the winding section. The auxiliary cutting section has a bottom layer break position. The bottom layer spacer includes an isolation portion and an auxiliary cutting portion. The isolation portion is located between the bottom layer of the diaphragm and the first bottom layer electrode. The auxiliary cutting portion is located between the connecting section and the auxiliary cutting section.

[0011] According to some embodiments of the present invention, the bottom partition is provided with a cutting positioning part on the side of the auxiliary cutting part facing the auxiliary cutting section, and the cutting positioning part corresponds to the bottom fracture position to locate the bottom fracture position.

[0012] According to some embodiments of the present invention, the bottom winding portion has a winding section, the winding section is provided with the bottom break position, the bottom break position is used for the cutting member to cut along the width direction of the winding section, or for the cutting member to cut along the side direction toward the winding section.

[0013] According to some embodiments of the present invention, the bottom partition is a rigid partition, a flexible partition, or a composite of a rigid partition and a flexible partition.

[0014] According to some embodiments of the present invention, the laminate further includes a top diaphragm layer, a top diaphragm spacer, a first top diaphragm electrode, a second top diaphragm layer, and a top diaphragm winding portion. The top diaphragm layer and the second top diaphragm layer are stacked together. The first top diaphragm electrode is located between the top diaphragm layer and the second top diaphragm layer. The top diaphragm spacer is located between the top diaphragm layer and the first top diaphragm electrode to isolate the top diaphragm layer and the first top diaphragm electrode. The top diaphragm winding portion is connected to the same side of the top diaphragm layer and the second top diaphragm layer. The top diaphragm winding portion has a top diaphragm break position for breaking to separate the top diaphragm layer and the second top diaphragm layer.

[0015] According to a second aspect of the present invention, the battery cell includes the diaphragm Z-shaped stacked structure described in the first aspect of the present invention.

[0016] According to the second aspect of the present invention, the battery cell has at least the following beneficial effects: the alignment of the inner electrode sheets in the stack is higher, which makes the consistency of the multiple stacks produced higher, thereby improving the consistency of the battery cell; and the first bottom electrode sheet and the middle layer electrode sheet of the stack are less likely to be misaligned, thus avoiding the impact on the battery cell capacity and avoiding the generation of defective products, thereby improving the yield of the battery cell manufacturing process.

[0017] A method for manufacturing an electrode overlay according to a third aspect embodiment of the present invention includes the following steps:

[0018] S1: Prepare a laminate, the laminate including a diaphragm bottom layer, a bottom layer spacer, a first bottom layer electrode, a diaphragm sublayer, and a bottom layer winding portion. The diaphragm bottom layer and the diaphragm sublayer are stacked. The first bottom layer electrode is located between the diaphragm bottom layer and the diaphragm sublayer. The bottom layer spacer is located between the diaphragm bottom layer and the first bottom layer electrode. The bottom layer winding portion is connected to the same side of the diaphragm bottom layer and the diaphragm sublayer.

[0019] S2: The laminate is hot-pressed and the bottom winding portion is cut;

[0020] S3: The diaphragm bottom layer and the bottom layer spacer are separated relative to the first bottom layer electrode.

[0021] The method for manufacturing an electrode outer layer stack according to a third aspect embodiment of the present invention has at least the following beneficial effects: by manufacturing a continuous diaphragm stack, the overall transfer of the stack is convenient. After the stack is hot-pressed, only the bottom layer of the diaphragm, which is isolated by the separator, is not bonded to the first bottom electrode. By cutting the bottom break point of the bottom winding portion, the bottom layer of the diaphragm is separated from the first bottom electrode, and the first bottom electrode is exposed to form an electrode outer layer stack. The electrode outer layer stack has been hot-pressed and can be directly transferred, which is convenient. Moreover, all the stacks of the stack are completed at one time, resulting in higher alignment of the stack and higher cell quality.

[0022] According to some embodiments of the present invention, the laminate further includes: a top diaphragm layer, a top diaphragm spacer, a first top diaphragm electrode, a second top diaphragm layer, and a top diaphragm winding portion, wherein the top diaphragm layer and the second top diaphragm layer are stacked, the first top diaphragm electrode is located between the top diaphragm layer and the second top diaphragm layer, the top diaphragm spacer is located between the top diaphragm layer and the first top diaphragm electrode, and the top diaphragm winding portion is connected to the same side of the top diaphragm layer and the second top diaphragm layer;

[0023] The manufacturing steps of the electrode overlay method also include:

[0024] S4: Cut the top layer of the winding portion;

[0025] S5: The top layer spacer and the top layer of the diaphragm are separated relative to the first top layer electrode.

[0026] According to some embodiments of the present invention, the laminate preparation steps include:

[0027] S11: Place the diaphragm on the stacking platform to form the diaphragm bottom layer;

[0028] S12: The bottom separator and the first electrode are placed sequentially above the bottom layer of the diaphragm. The first electrode is the first bottom electrode. The remaining diaphragm is wound to form a first diaphragm intermediate layer covering the first electrode. The first diaphragm intermediate layer is the diaphragm sub-bottom layer.

[0029] S13: Place a second electrode plate above the first diaphragm intermediate layer, the polarity of the second electrode plate being opposite to that of the first electrode plate, and wind the remaining diaphragm to form a second diaphragm intermediate layer covering the second electrode plate;

[0030] S14: Place the first electrode above the second membrane intermediate layer, and wind the remaining membrane to form the first membrane intermediate layer covering the first intermediate electrode.

[0031] S15: Repeat steps S13 to S14 N times, where N is a positive integer greater than or equal to 1, and the first electrode at the top is the first top electrode.

[0032] According to a fourth aspect of the present invention, a diaphragm Z-shaped stacking apparatus includes:

[0033] A laminated body apparatus for forming a laminated body, the laminated body including a diaphragm bottom layer, a bottom layer spacer, a first bottom layer electrode, a diaphragm sub-bottom layer, and a bottom layer winding portion, wherein the diaphragm bottom layer and the diaphragm sub-bottom layer are stacked, the first bottom layer electrode is located between the diaphragm bottom layer and the diaphragm sub-bottom layer, the bottom layer spacer is located between the first bottom layer electrode and the diaphragm bottom layer, and the bottom layer winding portion is connected to the same side of the diaphragm bottom layer and the diaphragm sub-bottom layer;

[0034] A spacer transfer device is used to transfer the bottom spacer between the bottom layer of the diaphragm and the first bottom layer electrode to isolate the bottom layer of the diaphragm from the first bottom layer electrode.

[0035] A hot pressing device for hot pressing the laminate, having a fracture element for breaking the bottom winding portion, so as to separate the bottom spacer and the diaphragm bottom layer relative to the first bottom electrode sheet;

[0036] A laminate transfer device for transferring the laminates stacked by the laminate device to the hot pressing device;

[0037] A control device configured to, after the diaphragm bottom layer is laminated in the laminated body assembly, control the spacer transfer device to transfer the bottom layer spacer to above the diaphragm bottom layer; after the laminated body assembly completes the laminated body, control the laminated body transfer device to transfer the laminated body onto the hot pressing device; and after the hot pressing device hot presses the laminated body, control the fracture element to break the bottom layer winding portion.

[0038] According to the fourth aspect of the present invention, the diaphragm Z-shaped stacking device has at least the following advantages: the stacked body is stacked by the stacking body device, and the first bottom electrode sheet and the bottom layer of the diaphragm can be added between the stacked body by adding a spacer transfer device, and a fracture member is added to the hot pressing device to break the bottom layer winding part, thereby realizing the separation of the bottom layer of the diaphragm and the first bottom electrode sheet, so that the first bottom electrode sheet is exposed. The overall modification of the equipment is small and the improvement cost is low.

[0039] According to some embodiments of the present invention, an auxiliary cutting component transfer device is also included. The bottom winding portion includes a connecting section, a winding section, and an auxiliary cutting section. The connecting section is connected between the bottom layer of the diaphragm and the winding section. The auxiliary cutting section is connected between the second bottom layer of the diaphragm and the winding section. The auxiliary cutting section is used for the fracture component to be fractured. The auxiliary cutting component transfer device is used for transferring the auxiliary cutting component between the auxiliary cutting section and the connecting section.

[0040] The control device is configured to transfer the auxiliary cutting member between the auxiliary cutting section and the connecting section after the diaphragm bottom layer is stacked in the laminated body assembly.

[0041] According to some embodiments of the present invention, an auxiliary clamping device is also included. The bottom winding portion includes a connecting section, a winding section and an auxiliary cutting section. The connecting section is connected between the bottom layer of the diaphragm and the winding section. The auxiliary cutting section is connected between the second bottom layer of the diaphragm and the winding section. The auxiliary cutting section is used for the fractured component to break. The auxiliary clamping device is used to clamp the auxiliary cutting section and the connecting section.

[0042] The auxiliary clamping device is configured to clamp the auxiliary cutting section and the connecting section after the bottom winding portion is stacked in the laminated body device.

[0043] According to some embodiments of the present invention, the bottom winding portion includes a connecting section, a winding section, and an auxiliary cutting section. The connecting section is connected between the bottom layer of the diaphragm and the winding section, and the auxiliary cutting section is connected between the second bottom layer of the diaphragm and the winding section. The auxiliary cutting section is used for the fracture member to break. The bottom partition includes an isolation portion and an auxiliary cutting portion.

[0044] The control device is configured to, after the diaphragm bottom layer is stacked in the laminated body assembly, control the spacer transfer device to transfer the isolation portion above the diaphragm bottom layer and to transfer the auxiliary cutting portion between the connecting section and the auxiliary cutting section.

[0045] According to some embodiments of the present invention, the laminated body device includes:

[0046] Diaphragm conveying assembly for conveying continuous diaphragms;

[0047] A stacking table, located below the diaphragm conveying assembly, is used to fix one end of the diaphragm;

[0048] In this process, one of the stacking stage and the diaphragm conveying assembly reciprocates relative to the other, or the stacking stage and the diaphragm conveying assembly move toward each other to form a diaphragm laminate. A first placement position and a second placement position are formed between different diaphragm layers of the diaphragm laminate. The first placement position and the second placement position are alternately arranged along the stacking direction, and the uppermost and lowermost positions of the diaphragm laminate are both the first placement positions.

[0049] The first electrode stage is used to transfer the first electrode to the first placement position;

[0050] The second electrode stage is used to transfer the second electrode to the second placement position.

[0051] According to some embodiments of the present invention, the first electrode stage is provided with a first transfer member having a travel distance between the first electrode stage and the stacking stage; the second electrode stage is provided with a second transfer member having a travel distance between the second electrode stage and the stacking stage; the first transfer member further has a travel distance between the spacer stage and the stacking stage, or the second transfer member further has a travel distance between the spacer stage and the stacking stage.

[0052] According to some embodiments of the present invention, the first electrode stage is provided with a first transfer member having a travel distance between the first electrode stage and the stacking stage; the second electrode stage is provided with a second transfer member having a travel distance between the second electrode stage and the stacking stage; the spacer stage is provided with a spacer transfer member having a travel distance between the spacer stage and the stacking stage.

[0053] According to some embodiments of the present invention, if the stacking stage has a reciprocating stroke below the first electrode stage and below the second electrode stage, the stacking stage can stretch the diaphragm below the first electrode stage to form a first placement position for placing the first bottom electrode, and the stacking stage can stretch the diaphragm below the second electrode stage to form a second placement position for placing the second electrode; the stacking stage also has a stroke for moving between the spacer stage and the stacking stage.

[0054] According to some embodiments of the present invention, if the stacking stage has a reciprocating stroke below the first electrode stage and below the second electrode stage, the stacking stage can stretch the diaphragm below the first electrode stage to form a first placement position for placing the first bottom electrode, and the stacking stage can stretch the diaphragm below the second electrode stage to form a second placement position for placing the second electrode; the spacer stage is provided with a spacer transfer member, and the spacer transfer member has a stroke for moving between the spacer stage and the stacking stage.

[0055] According to some embodiments of the present invention, the laminated body device includes:

[0056] Stacking table;

[0057] A diaphragm conveying assembly is disposed above the stacking table and is used to convey a continuous diaphragm to the stacking table;

[0058] A diaphragm stretching mechanism is located between the stacking table and the diaphragm conveying assembly. The diaphragm stretching mechanism includes a first stretching assembly and a second stretching assembly, which are respectively located on both sides of the diaphragm.

[0059] In this process, one of the first stretching component and the second stretching component reciprocates relative to the other, or the first stretching component and the second stretching component move toward each other to form a diaphragm laminate. A first placement position and a second placement position are formed between different diaphragm layers of the diaphragm laminate. The first placement position and the second placement position are alternately arranged along the lamination direction, and the uppermost and lowermost positions of the diaphragm laminate are both the first placement positions.

[0060] The first electrode stage is used to transfer the first electrode to the first placement position;

[0061] The second electrode stage is used to transfer the second electrode to the second placement position.

[0062] According to some embodiments of the present invention, the laminated body device is used to form the laminated body further having a top diaphragm layer, a top diaphragm spacer, a first top diaphragm electrode, a second top diaphragm layer, and a top diaphragm winding portion, wherein the top diaphragm layer and the second top diaphragm layer are stacked, the top diaphragm winding portion is connected to the same side of the top diaphragm layer and the second top diaphragm layer, and the first top diaphragm electrode is located between the top diaphragm layer and the second top diaphragm layer;

[0063] The spacer transfer device is also used to transfer the top layer spacer between the top layer of the diaphragm and the first top layer electrode to isolate the top layer of the diaphragm from the first top layer electrode.

[0064] The fracture element is also used to fracture the top layer winding portion to separate the top layer of the diaphragm, the top layer spacer, and the first top layer electrode sheet;

[0065] The control device is further configured to, after the first top electrode sheet is laminated in the laminated body device, control the spacer transfer device to transfer the top spacer to above the first top electrode sheet; and after the hot pressing device is hot pressing, control the fracture device to break the top winding portion.

[0066] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0067] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0068] Figure 1 This is a schematic diagram of the bottom spacer of a diaphragm Z-shaped stacked structure according to an embodiment of the present invention, which has an auxiliary cutting portion;

[0069] Figure 2 This is an exploded schematic diagram of the bottom layer spacer of the diaphragm Z-shaped stacked structure according to an embodiment of the present invention, showing an auxiliary cutting portion and the bottom layer of the diaphragm broken.

[0070] Figure 3 This is a schematic diagram of the bottom winding portion of the diaphragm Z-shaped laminate structure according to an embodiment of the present invention when it is cut off;

[0071] Figure 4 This is a schematic diagram of the structure of a diaphragm Z-shaped stacked sheet structure according to an embodiment of the present invention, which has both a bottom layer spacer and a top layer spacer.

[0072] Figure 5 This is a schematic diagram of the lamination process of the bottom spacer of the diaphragm Z-shaped laminated structure with an auxiliary cutting portion according to an embodiment of the present invention;

[0073] Figure 6This is a schematic diagram of the structure of the bottom spacer of the diaphragm Z-shaped stacking device according to an embodiment of the present invention, which has an auxiliary cutting portion;

[0074] Figure 7 This is a schematic diagram of the structure of the bottom winding part of the diaphragm Z-shaped stacking device according to an embodiment of the present invention when it is formed by a separate auxiliary cutting member;

[0075] Figure 8 This is a schematic diagram of the bottom winding portion of a diaphragm Z-shaped stacking device according to an embodiment of the present invention, formed by an auxiliary pressing device.

[0076] Icon labels:

[0077] Laminated body 100; First electrode 110; First bottom electrode 111; First top electrode 112; Second electrode 120; Separator 130; Separator bottom layer 131; Separator sub-bottom layer 132; Separator top layer 133; Separator sub-top layer 134; Winding section 140; Bottom winding section 141; Connecting section 1411; Winding section 1412; Auxiliary cutting section 1413; Top winding section 142; Bottom spacer 150; Isolation section 151; Auxiliary cutting section 152; Top spacer 160;

[0078] Laminated assembly 200; diaphragm conveying assembly 210; stacking stage 220; first electrode stage 230; first transfer member 231; second electrode stage 240; second transfer member 241;

[0079] Spacer transfer device 300;

[0080] Auxiliary cutting component transfer device 400; auxiliary cutting component 410;

[0081] Auxiliary clamping device 500. Detailed Implementation

[0082] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0083] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0084] In the description of this invention, "several" refers to one or more, and "multiple" refers to two or more. Any descriptions ending at the bottom or near the bottom are for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the indicated technical features.

[0085] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0086] It is important to understand that during the manufacturing process of a square battery, the first electrode 110, the second electrode 120, and the separator 130 are stacked sequentially using a lamination method. In related technologies, the first electrode roll is generally cut into multiple first electrode 110s, and the second electrode roll is cut into multiple second electrode 120s. The separator roll is zig-wound multiple times in a separator tape manner, forming a laminate 100 together with the first and second electrodes. After the laminate 100 is manufactured, the separator 130 within the laminate 100 is separated from the separator roll, and a single laminate 100 is completed. The separator roll continues to be unwound to manufacture the next laminate 100. During the zig-wound of the separator 130 multiple times, placement positions are formed between adjacent separator layers. The first electrode 110 and the second electrode 120 are alternately placed in all placement positions from bottom to top, and the continuous separator 130 forms a winding portion 140 on the same side of adjacent separator layers. After lamination, the laminate 100 is transferred to a hot pressing station for hot pressing. After hot pressing, the laminate 100 adheres to form a whole, and each laminate 100 can be hot-pressed to a specified height, making it easier to install the laminate 100 into the shell in the subsequent shelling process. Specifically, in the fabrication of the electrode outer layer laminate, firstly, the separator outer layer laminate is laminated in a lamination manner; secondly, the outermost electrode is placed at the hot pressing station; thirdly, the separator outer layer laminate is placed on top of the outermost electrode; finally, the electrode outer layer laminate is formed by hot pressing. However, during this manufacturing process, the electrodes of the diaphragm outer sheath laminate are positioned during the lamination process, and the outermost electrode is positioned with the diaphragm outer sheath laminate at the hot pressing station. The outermost electrode and the electrodes inside the diaphragm outer sheath laminate are positioned at different positions, which leads to an increase in positioning error. Furthermore, the diaphragm of the diaphragm outer sheath laminate covers the electrodes inside it, making the position of the electrodes inside the diaphragm outer sheath laminate invisible, which further increases the difficulty of aligning the electrodes inside the diaphragm outer sheath laminate with the outermost electrode, resulting in poor alignment between the electrodes inside the diaphragm outer sheath laminate and the outermost electrode, and low process yield.

[0087] Reference Figure 1 , Figure 2 and Figure 3As shown, the first aspect of the present invention proposes a diaphragm Z-shaped stacked structure, which mainly includes: a laminate 100, wherein the laminate 100 includes a diaphragm bottom layer 131, a bottom layer spacer 150, a first bottom layer electrode 111, a diaphragm sub-bottom layer 132, and a bottom layer winding portion 141, wherein the first electrode 110 located at the bottommost layer of the laminate 100 is the first bottom layer electrode 111, the diaphragm layer located at the bottommost layer of the laminate 100 is the diaphragm bottom layer 131, the diaphragm layer located one layer above the diaphragm bottom layer 131 is the diaphragm sub-bottom layer 132, the winding portion 140 located between the diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132 is the bottom layer winding portion 141, and the bottom layer spacer 150 is disposed between the first bottom layer electrode 111 and the diaphragm bottom layer 132. Between 31, the first bottom electrode 111 and the diaphragm bottom layer 131 are isolated, so that after hot pressing, the first bottom electrode 111 and the diaphragm bottom layer 131 remain independent of each other. The bottom layer winding portion 141 is provided with a bottom layer break position. After the bottom layer break position is broken, the diaphragm bottom layer 131 separates from the diaphragm sub-bottom layer 132, and the diaphragm bottom layer 131 and the first bottom electrode 111 will also separate from each other, exposing the first bottom electrode 111. This realizes the fabrication of the electrode outer layer laminate, so that the diaphragm Z-shaped laminate structure in this embodiment can be formed into the entire laminate 100 in one step, without the need to separately form the first bottom electrode 111, which improves the alignment of the first bottom electrode 111 with the other electrodes and improves the process yield of the laminate 100.

[0088] In this embodiment, the first electrode 110 is a negative electrode and the second electrode 120 is a positive electrode. It should be understood that the first electrode 110 can also be a positive electrode and the second electrode 120 can be a negative electrode. The first electrode 110 can also be a composite electrode pre-fabricated by hot pressing a positive electrode, a separator 130, and a negative electrode. The second electrode 120 is a composite electrode identical to the first electrode 110. The first electrode 110 can also be the bottom layer of a Z-shaped wound electrode strip, with the winding direction of the electrode strip perpendicular to the winding direction of the separator 130. The second electrode 120 is a sheet-like electrode.

[0089] The first bottom electrode 111 is generally a single-sided coated electrode. The electrode typically includes a coating and a metal current collector. The coating is generally applied to both surfaces of the metal current collector. Single-sided coating means that the coating only coats one surface of the metal current collector. The coated side of the first bottom electrode 111 faces the second electrode 120, and the uncoated surface of the metal current collector is located on the outermost side of the laminate 100. The negative electrode metal current collector is generally copper foil, and the positive electrode metal current collector is generally aluminum foil.

[0090] The diaphragm 130 is used for zigzag winding to separate the first electrode 110 and the second electrode 120. The diaphragm 130 can be cut by a cutting tool such as a cutter. It should be understood that the diaphragm 130 can also have a pre-set tear line or tear groove at the location where it needs to break, and the diaphragm 130 can also be broken by tearing.

[0091] The bottom spacer 150 serves to isolate the first bottom electrode 111 and the diaphragm bottom layer 131. The cross-section of the bottom spacer 150 needs to be larger than the cross-section of the first bottom electrode 111. The first bottom electrode 111 can be completely placed on the upper surface of the bottom spacer 150 so that it can be separated by the bottom spacer 150.

[0092] Based on the aforementioned structure, after the laminate 100 is stacked and hot-pressed, the laminate 100 is bonded together as one unit. However, because the bottom separator 150 isolates the bottom separator 131 and the first bottom electrode 111, the bottom separator 131 and the first bottom electrode 111 remain separated after hot pressing. After the bottom breakage position of the broken bottom winding part 141, the bottom separator 131 and the laminate 100 can be directly separated, so that the bottom electrode is exposed to form an electrode-wrapped battery cell. The laminate 100 is formed in one step at the lamination station. The alignment of the electrodes in the laminate 100 is high, resulting in a high alignment of the electrodes in the electrode-wrapped battery cell and a higher yield of the electrode-wrapped battery cell.

[0093] Reference Figure 1 and Figure 2 As shown, in some other specific embodiments of the present invention, the bottom winding portion 141 includes a connecting section 1411, a winding section 1412, and an auxiliary cutting section 1413. The connecting section 1411 is connected to the bottom layer of the diaphragm 131 and the winding section 1412. The auxiliary cutting section 1413 is connected to the second bottom layer of the diaphragm 132 and the winding section 1412. The auxiliary cutting section 1413 is provided with a bottom layer break position. The bottom layer spacer 150 includes an isolation portion 151 and an auxiliary cutting portion 152. The isolation portion 151 is located between the bottom layer of the diaphragm 131 and the first bottom layer electrode 111. The auxiliary cutting portion 152 is located between the connecting section 1411 and the auxiliary cutting section 1413.

[0094] It is worth understanding that, through the connecting section 1411 and the auxiliary cutting section 1413, the bottom winding portion 141 extends longer than the other winding portions 140, and the bottom winding portion 141 protrudes beyond the other winding portions 140 of the laminate 100, so as to facilitate cutting and play an auxiliary cutting role. During the winding process of the diaphragm 130, the diaphragm 130 is always under a certain tension. Without external interference, the diaphragm 130 will be directly wound along the edge of the first electrode 110 or the second electrode 120. In this embodiment, the connecting section 1411 and the auxiliary cutting section 1413 are formed by the auxiliary cutting portion 152 of the bottom spacer 150. During the winding of the diaphragm 130, the diaphragm 130 is wound along the bottom spacer 150. The auxiliary cutting portion 152 of the bottom spacer 150 forms the bottom wound portion 141 with the connecting section 1411 and the auxiliary cutting section 1413. Simultaneously, during the hot pressing of the laminate 100, the isolation portion 151 of the bottom spacer 150 can isolate the bottom layer of the diaphragm 131 and the first bottom electrode 111, preventing them from sticking together. The bottom spacer 150 simultaneously serves as an auxiliary cutting and isolation component. In this embodiment, the bottom spacer 150 is a rigid diaphragm. It should be understood that the bottom partition 150 can also be a flexible partition, or a composite component in which the heat insulation part is a flexible partition and the auxiliary cutting part 152 is a rigid partition, or a composite component in which the bottom partition 150 is a flexible partition on top and a rigid partition on the bottom.

[0095] Furthermore, after the bottom fracture point of the auxiliary cutting section 1413 is broken, the bottom layer of the diaphragm 131, the connecting section 1411 and the winding section 1412 are all separated from the bottom layer of the diaphragm 132. The remaining length of the diaphragm 130 after cutting on the bottom layer of the diaphragm 132 is less, the appearance of the laminate 100 is more neat, and the influence of the diaphragm 130 remaining on the bottom layer of the diaphragm 132 during the shell insertion process is also reduced, making the shell insertion more convenient.

[0096] Reference Figure 1 and Figure 2 As shown, in some other specific embodiments of the present invention, the bottom partition 150 is provided with a cutting positioning part on the side of the auxiliary cutting part 152 facing the auxiliary cutting section 1413. The cutting positioning part corresponds to the bottom fracture position to locate the bottom fracture position.

[0097] It is understandable that by locating the fracture point of the bottom layer through the cutting and positioning part, the bottom layer winding part 141 can be cut at the same position. When manufacturing the laminate 100 in batches, the length of the diaphragm 130 remaining in the diaphragm sub-bottom layer 132 of the laminate 100 is more consistent, the process error is smaller, and the lamination 100 is more convenient to be installed in the shell. In this embodiment, the cutting and positioning part is a positioning groove.

[0098] Reference Figure 3As shown, in some other specific embodiments of the present invention, the bottom winding portion 141 has a winding section 1412, the winding section 1412 is provided with a bottom break position, the bottom break position is used for the cutting member to cut along the width direction of the winding section 1412, or for the cutting member to cut along the direction toward the side where the winding section 1412 is located.

[0099] It is understandable that when the bottom winding portion 141 is the same as the other winding portions 140 of the laminate 100, the cutting member can cut the bottom winding portion 141 in a direction perpendicular to the side of the laminate 100 to break the bottom winding portion 141. The laminate 100 can then be laminated according to the normal lamination process, with minimal changes to the lamination process, making improvements easier and less costly. It should also be understood that when the bottom winding portion 141 protrudes beyond the other winding portions 140, the cutting member can also cut the bottom winding portion 141 in a direction perpendicular to the side of the laminate 100.

[0100] Reference Figure 4 As shown, in some other specific embodiments of the present invention, the laminate 100 further includes a top diaphragm 133, a top diaphragm spacer 160, a first top diaphragm electrode 112, a second top diaphragm 134, and a top diaphragm winding portion 142. The top diaphragm 133 and the second top diaphragm 134 are stacked together. The first top diaphragm electrode 112 is located between the top diaphragm 133 and the second top diaphragm 134. The top diaphragm spacer 160 is located between the top diaphragm 133 and the first top diaphragm electrode 112 to isolate the top diaphragm 133 and the first top diaphragm electrode 112. The top diaphragm winding portion 142 is connected to the same side of the top diaphragm 133 and the second top diaphragm 134. The top diaphragm winding portion 142 has a top diaphragm break position for breaking to separate the top diaphragm 133 and the second top diaphragm 134.

[0101] It is worth understanding that when the top of the laminate 100 is also designed as an electrode outer layer, the polarity of the exposed electrode at the top of the laminate 100 needs to be the same as the polarity of the exposed electrode at the bottom. When the electrode wrapped at the bottom of the laminate 100 is the first electrode 110, the electrode wrapped at the top of the laminate 100 is also the first electrode 110, and the electrode wrapped at the top is the first top electrode 112. The diaphragm 130 covering the first top electrode 112 of the laminate 100 is the top diaphragm 133, the diaphragm layer below the top diaphragm 133 is the second top diaphragm 134, and the winding portion 140 at the very top of the laminate 100 is the top winding portion 142. When the first top electrode 112 needs to be exposed, the first top electrode 112 is separated from the top membrane top layer 133 by the top layer spacer 160. After hot pressing, the top layer winding portion 142 is broken through the top layer fracture position, so that the top membrane top layer 133 is separated from the first top electrode 112 relative to the second top layer 134 of the membrane, and the first top electrode 112 is exposed. In the hot pressing process, the first top electrode 112 comes into contact with the hot pressing equipment through the top membrane top layer 133, which has less impact on the first top electrode 112. Moreover, before hot pressing, when the first top electrode 112 is covered by the top membrane top layer 133, the top membrane top layer 133 plays a role in fixing the first top electrode 112, which can prevent the first top electrode 112 from shifting during the transfer process, so as to maintain the alignment of the laminate 100 before hot pressing and improve the yield of the laminate 100. It should be understood that after the first top electrode 112 of the laminate 100 is placed, the top diaphragm 133 may not be covered on the first top electrode 112, so that the first top electrode is directly exposed.

[0102] As another implementation, the top of the laminate 100 can also be designed to be covered by a diaphragm 130. In this case, the electrode at the top of the laminate 100 is covered by the diaphragm 130, which can be the first electrode 110 or the second electrode 120. However, in general, the topmost electrode of the laminate 100 and the bottommost electrode of the laminate 100 should be electrodes of the same polarity, and the polarity of the electrode is generally negative.

[0103] A second aspect of the present invention provides a battery cell, including the diaphragm Z-shaped stacked structure of the first aspect of the present invention.

[0104] It's important to understand that the upper limit of a battery cell's capacity is often determined by the proportion of the positive and negative electrode coatings inside the cell relative to the separator 130. In a cell encapsulated by the separator 130, the outermost separator 130 occupies a certain thickness. However, encapsulating the cell with electrode sheets reduces the thickness of the outermost separator 130, thus lowering the overall thickness of the laminate 100 and reducing the difficulty of inserting the laminate 100 into the casing. Alternatively, by increasing the amount of positive and negative electrode coatings, the overall thickness of the laminate 100 can be kept constant, thereby increasing the cell's capacity.

[0105] It is worth understanding that the higher alignment of the inner electrode sheets of the laminate 100 makes the consistency of the multiple laminates 100 produced higher, thereby improving the consistency of the battery cell. Furthermore, the first bottom electrode sheet 111 is less likely to be misaligned with the middle layer electrode sheets of the laminate, avoiding the impact on the battery cell capacity and thus avoiding the generation of defective products, thereby improving the yield of the battery cell manufacturing process.

[0106] Reference Figure 5 As shown, a third aspect embodiment of the present invention provides a method for fabricating an electrode outer layer stack, the fabrication steps of which include:

[0107] S1: Prepare a laminate 100. The laminate 100 includes a diaphragm bottom layer 131, a bottom layer spacer 150, a first bottom layer electrode 111, a diaphragm sub-bottom layer 132, and a bottom layer winding portion 141. The diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132 are stacked. The first bottom layer electrode 111 is located between the diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132. The bottom layer spacer 150 is located between the diaphragm bottom layer 131 and the first bottom layer electrode 111. The bottom layer winding portion 141 is connected to the same side of the diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132.

[0108] S2: The laminate 100 is hot-pressed and the bottom winding portion 141 is cut off;

[0109] S3: The diaphragm bottom layer 131 and the bottom spacer 150 are separated from the first bottom electrode 111.

[0110] It is understandable that in the fabrication of the laminate 100, a bottom spacer 150 is inserted between the diaphragm bottom layer 131 and the first bottom electrode 111 of the laminate 100. Then, the laminate 100 is stacked normally. The first bottom electrode 111 of the fabricated laminate 100 is covered by the diaphragm bottom layer 131. The laminate 100 fixes the stacked first electrode 110 and second electrode 120 by the tension of the diaphragm 130. The first bottom electrode 111 is also fixed by the diaphragm bottom layer 131. At this time, the laminate 100 forms a whole by the tension of the diaphragm 130. During the transfer of the laminate 100, the relative position of the first bottom electrode 111 remains fixed, minimizing the impact of the transfer on the precision of the laminate 100. After the laminate 100 is transferred to the hot pressing station, it is formed by hot pressing. After hot pressing, the laminate 100... Adjacent electrodes and separators 130 are bonded to each other, but the first bottom electrode 111 and the bottom separator 131 are separated by the bottom spacer 150. The first bottom electrode 111 is not bonded to the bottom separator 131, nor to the bottom spacer 150. After the bottom winding portion 141 is broken, the bottom separator 131 separates from the first bottom electrode 111, and the bottom spacer 150 also separates from the first bottom electrode 111, exposing the first bottom electrode 111 and creating a laminate 100 encased by the first bottom electrode 111. The electrodes of the laminate 100 are stacked in one step, resulting in higher alignment of the electrodes in the laminate 100. Furthermore, after the laminate 100 is hot-pressed, the bottom spacer 150 and the bottom separator 131 are separated from the first bottom electrode 111 and the casing process is performed, making transfer and manufacturing more convenient. It should be understood that after the laminate 100 is transferred to the hot pressing station, the laminate 100 will not be transferred again, but will be hot pressed at the hot pressing station. Therefore, after the laminate 100 is transferred to the hot pressing station, the bottom winding portion 141 of the laminate 100 can be broken, or the bottom winding portion 141 of the laminate 100 can be broken during the hot pressing process, saving the time required for the process.

[0111] Reference Figure 5 As shown, in some other specific embodiments of the present invention, the laminate 100 further includes: a top membrane 133, a top membrane spacer 160, a first top membrane electrode 112, a second top membrane 134, and a top membrane winding portion 142. The top membrane 133 and the second top membrane 134 are stacked, the first top membrane electrode 112 is located between the top membrane 133 and the second top membrane 134, the top membrane spacer 160 is located between the top membrane 133 and the first top membrane electrode 112, and the top membrane winding portion 142 is connected to the same side of the top membrane 133 and the second top membrane 134.

[0112] The manufacturing steps of the electrode overlay method also include:

[0113] S4: Cut the top layer winding portion 142;

[0114] S5: The top layer spacer 160 and the top layer of the diaphragm 133 are separated relative to the first top layer electrode 112.

[0115] It is understandable that when the laminate 100 is wrapped with an outer electrode at the top, the top layer spacer 160 and the top layer of the separator 133 can be placed above the first top layer electrode 112. After hot pressing, the top layer winding portion 142 can be broken to separate the top layer of the separator 133, the top layer spacer 160 from the first top layer electrode 112, thus exposing the first top layer electrode 112. It should be understood that the top layer winding portion 142 can be cut together with the bottom layer winding portion 141 to improve cutting efficiency.

[0116] As another implementation, after placing the first top electrode 112, the diaphragm 130 can be left unwound to form the top layer 133 of the diaphragm, and the first top electrode 112 can be directly exposed.

[0117] Specifically, the first preparation step of the laminate 100 includes:

[0118] S11: Place the diaphragm 130 on the stacking platform to form the diaphragm bottom layer 131;

[0119] S12: Place the bottom separator 150 and the first electrode 110 in sequence above the bottom layer 131 of the diaphragm. The first electrode 110 is the first bottom electrode 111. The remaining diaphragm 130 is wound to form a first diaphragm intermediate layer covering the first electrode 110. The first diaphragm intermediate layer is the diaphragm sub-bottom layer 132.

[0120] S13: A second electrode 120 is placed above the first diaphragm intermediate layer. The polarity of the second electrode 120 is opposite to that of the first electrode 110. The remaining diaphragm 130 is wound to form a second diaphragm intermediate layer covering the second electrode 120.

[0121] S14: Place the first electrode 110 above the second diaphragm intermediate layer, and wind the remaining diaphragm 130 to form a first diaphragm intermediate layer covering the first intermediate electrode.

[0122] S15: Repeat steps S13 to S14 N times, where N is a positive integer greater than or equal to 1, and the topmost electrode 110 is the first top electrode 112.

[0123] It is worth understanding that both the first electrode 110 and the second electrode 120 are unipolar electrodes. The first electrode 110 can be a negative electrode, and the second electrode 120 can be a negative electrode.

[0124] The second preparation step of the laminate 100 includes:

[0125] S11: Place the diaphragm 130 on the stacking platform to form the diaphragm bottom layer 131;

[0126] S12: Place the bottom separator 150 and the first bottom electrode 111 on top of the bottom separator 131 in sequence, and wind the remaining separator 130 to form a separator sub-bottom layer 132 covering the first bottom electrode 111.

[0127] S13: Place a first intermediate electrode on top of the diaphragm sub-bottom layer 132, the polarity of the bottom of the first intermediate electrode is opposite to the polarity of the top of the first bottom electrode 111, and wind the remaining diaphragm 130 to form a first diaphragm intermediate layer covering the first intermediate electrode.

[0128] S14: Place a first intermediate electrode on top of the first intermediate membrane layer, the polarity of the bottom of the first intermediate electrode is opposite to the polarity of the top of the first intermediate electrode, and wind the remaining membrane 130 to form a first intermediate membrane layer covering the first intermediate electrode.

[0129] S15: If step S14 is repeated N times, N is a positive integer greater than or equal to 1;

[0130] S16: Place the first top electrode 112 above the middle layer of the first diaphragm, and the polarity of the top of the first top electrode 112 is the same as the polarity of the bottom of the first bottom electrode 111.

[0131] It is worth understanding that both the first electrode 110 and the second electrode 120 are composite electrodes with a negative electrode, a separator 130, and a positive electrode.

[0132] The third preparation step of the laminate 100 includes:

[0133] S11: Place the diaphragm 130 on the stacking platform to form the diaphragm bottom layer 131;

[0134] S12: Place the first bottom electrode 111 above the bottom layer of the separator 131, and wind the remaining separator 130 to form a separator sub-bottom layer 132 covering the first bottom electrode 111.

[0135] S13: A second electrode 120 is placed above the bottom layer 132 of the diaphragm. The polarity of the second electrode 120 is opposite to that of the first bottom layer electrode 111. The remaining diaphragm 130 is wound to form a second diaphragm intermediate layer covering the second electrode 120.

[0136] S14: The remaining first electrode 110 is wound to form a first intermediate electrode covering the middle layer of the second separator. The polarity of the first intermediate electrode is the same as that of the first bottom electrode 111. The remaining separator 130 is wound to form a first separator middle layer covering the first intermediate electrode.

[0137] S15: Place the second electrode 120 above the first diaphragm intermediate layer, and wind the remaining diaphragm 130 to form a second diaphragm intermediate layer covering the second electrode 120.

[0138] S16: Repeat steps S13 to S15 N times, where N is a positive integer greater than or equal to 1;

[0139] S17: Place the first top electrode 112 above the middle layer of the second diaphragm at the topmost point. The polarity of the first top electrode 112 is the same as that of the first bottom electrode 111.

[0140] It is worth understanding that the first electrode 110 is a continuous electrode strip with a single polarity, while the second electrode 120 is a separate sheet electrode with the opposite polarity to the first electrode 110.

[0141] Reference Figure 6 , Figure 7 and Figure 8As shown, a fourth aspect embodiment of the present invention provides a diaphragm Z-shaped stacking device, comprising: a stacking body device 200, a spacer transfer device 300, a hot pressing device, a stacking body transfer device, and a control device. The stacking body device 200 is used to form a stacked body 100. The stacked body 100 includes a diaphragm bottom layer 131, a bottom layer spacer 150, a first bottom layer electrode 111, a diaphragm sub-bottom layer 132, and a bottom layer winding portion 141. The diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132 are stacked. The first bottom layer electrode 111 is located between the diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132. The bottom layer spacer 150 is located between the first bottom layer electrode 111 and the diaphragm bottom layer 131. The bottom layer winding portion 141 is connected to the diaphragm bottom layer 131 and the diaphragm sub-bottom layer 132. On the same side; a spacer transfer device 300, used to transfer the bottom spacer 150 between the diaphragm bottom layer 131 and the first bottom electrode 111, to isolate the diaphragm bottom layer 131 and the first bottom electrode 111; a hot pressing device, used to hot press the laminate 100, so that adjacent electrodes and diaphragms 130 in the laminate 100 are bonded together as a whole, and has a breaking member, which is used to break the bottom winding portion 141, so that the bottom spacer 150 and the diaphragm bottom layer 131 are separated from the first bottom electrode 111; a laminate transfer device, used to transfer the laminate 100 stacked by the laminate assembly 200 to the hot pressing device; a control device, used to control the operation of the laminate assembly 200, the spacer transfer device 300, the hot pressing device and the laminate transfer device. This allows the diaphragm Z-shaped laminate equipment in this embodiment to produce the above-mentioned diaphragm Z-shaped laminate structure without much modification, resulting in lower equipment modification costs.

[0142] In this embodiment, the stacking device 200 is used to stack the stacked body 100. The stacking device 200 can stack the stacked body 100 in a variety of ways, and this solution does not impose any specific restrictions on this.

[0143] After the separator bottom layer 131 is stacked by the laminate assembly 200, the spacer transfer device 300 transfers the bottom spacer 150 to the top of the separator bottom layer 131, and the laminate assembly 100 continues to be stacked. The bottom spacer 150 transferred by the spacer transfer device 300 can isolate the separator bottom layer 131 and the first bottom electrode 111.

[0144] A hot pressing device is used to hot press and form the laminate 100. This solution does not limit the specific structure of the hot pressing device. The hot pressing device is equipped with a fracture component, which breaks the bottom winding portion 141 after hot pressing, so that the bottom layer 131 of the diaphragm is separated from the bottom sublayer 132 of the diaphragm. After the bottom layer 131 of the diaphragm and the bottom spacer 150 are separated in the laminate 100, the first bottom electrode 111 is exposed, and the electrode outer laminate with higher alignment is formed in one step.

[0145] The laminate transfer device 200 is used to transfer the laminate 100 after it is fabricated. If the bottom electrode of the laminate 100 is exposed during the transfer, it will undoubtedly make the transfer of the laminate 100 difficult. In addition, the bottom electrode of the laminate 100 is prone to misalignment during the transfer process, resulting in defective products. Therefore, the electrode is often laminated a second time on the laminate 100 wrapped by the separator 130 at the hot pressing station. However, the problem of poor electrode alignment still exists. By directly transferring the laminate 100 wrapped by the diaphragm 130 in this solution, all electrodes are fixed by the diaphragm 130, facilitating the transfer of the laminate 100 and minimizing the impact on the laminate 100 during the transfer process. This results in higher alignment of all electrodes in the laminate 100. At the hot pressing station, the bottom layer 131 of the diaphragm and the bottom spacer 150 are separated from the second bottom layer 132 of the diaphragm to form a laminate with higher alignment in one step. It should be understood that the laminate transfer device is a gripper or robotic arm with a reciprocating stroke between the laminate device 200 and the hot pressing device.

[0146] A control device is used to control the operation of the laminate assembly 200, the spacer transfer device 300, the hot pressing device, and the laminate transfer device to control the corresponding devices at appropriate times, thereby cutting the bottom winding portion 141 at the hot pressing station to obtain an electrode outer-coated laminate with higher alignment. Specifically, after the laminate assembly 200 laminates the bottom layer 131 of the separator, the spacer transfer device 300 is controlled to transfer the bottom spacer 150 above the bottom layer 131 of the separator; after the laminate assembly 200 completes the laminate 100, the laminate transfer device is controlled to transfer the laminate 100 onto the hot pressing device; after the hot pressing device performs hot pressing, the bottom winding portion 141 is broken by the breakage device.

[0147] Based on the aforementioned structure, a laminate 100 is stacked by a laminate assembly 200. By adding a spacer transfer device 300, a bottom spacer 150 is added between the first bottom electrode 111 and the bottom separator 131 of the laminate 100 during the process of stacking the laminate 100 by the laminate assembly 200. Furthermore, a fracture device is added to the hot pressing device to fracture the bottom winding portion 141, thereby separating the bottom separator 131 from the first bottom electrode 111 and the bottom spacer 150, thus exposing the first bottom electrode 111. The overall modification of the equipment is small, and the improvement cost is low.

[0148] Reference Figure 7As shown, in some other specific embodiments of the present invention, an auxiliary cutting component transfer device 400 is also included. The bottom winding portion 141 includes a connecting section 1411, a winding section 1412 and an auxiliary cutting section 1413. The connecting section 1411 is connected between the bottom layer of the diaphragm 131 and the winding section 1412. The auxiliary cutting section 1413 is connected between the second bottom layer of the diaphragm 132 and the winding section 1412. The auxiliary cutting section 1413 is used for the breaking component to be broken. The auxiliary cutting component transfer device 400 is used to transfer the auxiliary cutting component 410 to the space between the auxiliary cutting section 1413 and the connecting section 1411.

[0149] The control device is configured to transfer the auxiliary cutting member 410 between the auxiliary cutting section 1413 and the connecting section 1411 after the laminated membrane bottom layer 131 is laminated in the laminated body device 200.

[0150] It is understandable that the connecting section 1411 and the auxiliary cutting section 1413 of the bottom winding portion 141 are formed by a separate auxiliary cutting member 410, so as to facilitate the cutting of the auxiliary cutting section 1413. The auxiliary cutting member 410 is transferred by the auxiliary cutting member transfer device 400 to realize the placement of the auxiliary cutting member 410. Specifically, after the laminated body device 200 laminates the bottom layer of the diaphragm 131, the bottom spacer 150 is placed on the bottom layer of the diaphragm 131 by the spacer transfer device 300, and the auxiliary cutting member 410 is placed side by side with the bottom spacer 150. Then, the first bottom electrode 111 is placed above the bottom spacer 150. Finally, the laminated body device 200 controls the diaphragm 130 to continue winding above the first bottom electrode 111 to form the diaphragm sub-bottom layer 132. The separate auxiliary cutting member 410 can assist the bottom winding portion 141 to extend out of the other winding portions 140 of the laminate 100, so as to cut the bottom winding portion 141. At the same time, the cutting position can be selected between the auxiliary cutting member 410 and the bottom spacer 150. The cutting tool can cut directly to the bottom of the laminate 100 in one go between the auxiliary cutting member 410 and the bottom spacer 150 without stopping abruptly on the bottom spacer 150 or cutting the bottom spacer 150. The control of the cutting tool is more convenient, and it can effectively avoid cutting the bottom spacer 150 and wasting the bottom spacer 150.

[0151] Reference Figure 8 As shown, in some other specific embodiments of the present invention, an auxiliary pressing device 500 is also included. The bottom winding portion 141 includes a connecting section 1411, a winding section 1412 and an auxiliary cutting section 1413. The connecting section 1411 is connected between the bottom layer of the diaphragm 131 and the winding section 1412. The auxiliary cutting section 1413 is connected between the second bottom layer of the diaphragm 132 and the winding section 1412. The auxiliary cutting section 1413 is used for the fracture of the fractured part. The auxiliary pressing device 500 is used to press the auxiliary cutting section 1413 and the connecting section 1411.

[0152] The auxiliary clamping device 500 is configured to clamp the auxiliary cutting section 1413 and the connecting section 1411 after the laminated body device 200 has laminated the bottom winding section 141.

[0153] It is understandable that the connecting section 1411 and the auxiliary cutting section 1413 of the bottom winding portion 141 are pressed by the auxiliary pressing device 500 so that the connecting section 1411 and the auxiliary cutting section 1413 of the bottom winding portion 141 are formed during the lamination of the laminate assembly 200, so as to facilitate the cutting of the auxiliary cutting section 1413. It should be understood that during the process of the laminate assembly 200 winding the diaphragm 130 to form the laminate 100, the laminate assembly 200 applies a certain tension to the diaphragm 130 so that the diaphragm 130 can cover the electrode under the action of the tension. The electrode is pressed during the process of the diaphragm 130 being stretched and wound, so that the diaphragm 130 can cover the edge of the electrode with a certain tension, making the gap between the diaphragm 130 and the electrode smaller. By using the auxiliary pressing device 500 to press the connecting section 1411 and the auxiliary cutting section 1413 of the bottom winding part 141, the diaphragm 130 can still continuously cover the electrode with a certain tension, and the connecting section 1411 and the auxiliary cutting section 1413 of the bottom winding part 141 can be smoothly formed without moving to the edge of the electrode, thus realizing the stacking of the laminate 100 and facilitating cutting.

[0154] Reference Figure 7 As shown, in some other specific embodiments of the present invention, the bottom winding portion 141 includes a connecting section 1411, a winding section 1412 and an auxiliary cutting section 1413. The connecting section 1411 is connected between the bottom layer of the diaphragm 131 and the winding section 1412. The auxiliary cutting section 1413 is connected between the bottom sub-bottom layer of the diaphragm 132 and the winding section 1412. The auxiliary cutting section 1413 is used for the fracture of the fractured component. The bottom spacer 150 includes an isolation portion 151 and an auxiliary cutting portion 152.

[0155] The control device is configured to, after the laminated body device 200 laminates the bottom layer 131 of the diaphragm, control the spacer transfer device 300 to transfer the isolation part 151 above the bottom layer 131 of the diaphragm, and to transfer the auxiliary cutting part 152 between the connecting section 1411 and the auxiliary cutting section 1413.

[0156] It is understandable that the bottom spacer 150 extends beyond the other winding portions 140 of the laminate 100, forming a bottom winding portion 141 that extends beyond the other winding portions 140 of the laminate 100. This facilitates positioning and cutting of the bottom winding portion 141 during cutting, making the cutting process more convenient. Furthermore, the bottom spacer 150 directly forms a connecting section 1411 and an auxiliary cutting section 1413 on the bottom winding portion 141. Cutting is performed at the auxiliary cutting section 1413, resulting in less remaining membrane 130 at the cutting position and a neater edge of the laminate 100.

[0157] Reference Figure 6 , Figure 7 and Figure 8 As shown, in some other embodiments of the present invention, the laminate device 200 includes:

[0158] Diaphragm conveying assembly 210 is used to convey a continuous diaphragm 130;

[0159] The stacking table 220 is located below the diaphragm conveying assembly 210 and is used to fix one end of the diaphragm 130.

[0160] In this process, one of the stacking stage 220 and the diaphragm conveying assembly 210 reciprocates relative to the other, or the stacking stage 220 and the diaphragm conveying assembly 210 move toward each other to form a diaphragm stack. A first placement position and a second placement position are formed between different diaphragm layers in the diaphragm stack. The first placement position and the second placement position are alternately arranged along the stacking direction, and the uppermost and lowermost parts of the diaphragm stack are both the first placement positions.

[0161] The first electrode stage 230 is used to transfer the first electrode 110 to the first placement position;

[0162] The second electrode stage 240 is used to transfer the second electrode 120 to the second placement position.

[0163] In this context, "moving in opposite directions" means that the stacking stage 220 and the diaphragm conveying assembly 210 move in opposite directions.

[0164] It is understandable that the laminate 100 can achieve Z-shaped winding through the relative movement of the stacking stage 220 and the diaphragm conveying assembly 210, and the laminate 100 can be fabricated by alternately stacking the first electrode 110, the second electrode 120, and the diaphragm 130 through the first electrode stage 230 and the second electrode stage 240. The spacer transfer device 300 is also equipped with a spacer stage for transfer.

[0165] Based on the relative motion of the diaphragm 130 transport platform and the stacking platform 220, and the relative motion of the first electrode platform 230 and the second electrode platform 240, the following situations can be identified.

[0166] In the first scenario, one of the stacking stage 220 and the diaphragm conveying assembly 210 reciprocates relative to the other. The first electrode stage 230 is provided with a first transfer member 231 and a second transfer member 241. One of the first transfer member 231 and the second transfer member 241 can transfer the spacer to the stacking stage 220.

[0167] Specifically, refer to Figure 6 , Figure 7 and Figure 8 As shown, the first transfer member 231 has a travel distance between the first electrode stage 230 and the stacking stage 220; the second transfer member 241 has a travel distance between the second electrode stage 240 and the stacking stage 220; the first transfer member 231 also has a travel distance between the spacer stage and the stacking stage 220, or the second transfer member 241 also has a travel distance between the spacer stage and the stacking stage 220. The first transfer member 231 and the second transfer member 241 can be grippers or robotic arms with travel distances.

[0168] Specifically, the stacking stage 220 may reciprocate relative to the diaphragm conveying assembly 210 to form a Z-shaped diaphragm stack, or the diaphragm conveying assembly 210 may reciprocate relative to the stacking stage 220 to form a Z-shaped diaphragm stack.

[0169] In the second scenario, one of the stacking stage 220 and the diaphragm conveying assembly 210 reciprocates relative to the other. The first electrode stage 230 is provided with a first transfer member 231, the first electrode stage 230 is provided with a second transfer member 241, and the spacer transfer device 300 is provided with a spacer transfer member.

[0170] Specifically, the first transfer member 231 has a travel distance between the first electrode stage 230 and the stacking stage 220; the second transfer member 241 has a travel distance between the second electrode stage 240 and the stacking stage 220; the spacer stage is provided with a spacer transfer member, which has a travel distance between the spacer stage and the stacking stage 220. The first transfer member 231, the second transfer member 241, and the spacer transfer member can be grippers or robotic arms with a travel distance.

[0171] Specifically, the stacking stage 220 may reciprocate relative to the diaphragm conveying assembly 210 to form a Z-shaped diaphragm stack, or the diaphragm conveying assembly 210 may reciprocate relative to the stacking stage 220 to form a Z-shaped diaphragm stack.

[0172] In the third case, the stacking stage 220 has a travel distance that moves below the first electrode stage 230, below the second electrode stage 240, and below the spacer stage.

[0173] Specifically, the first electrode stage 230 and the spacer stage are located on one side of the stacking stage 220, and the second electrode stage 240 is located on the other side of the stacking stage 220. When the stacking stage 220 moves below the first electrode stage 230, the diaphragm 130 on the stacking stage 220 automatically stretches to form a diaphragm layer. The first electrode 110 is placed on the stacking stage 220 from the first electrode stage 230, and a clamping plate is provided on the stacking stage 220. The clamping plate can clamp the stacked first electrode 110. After the first electrode 110 is stacked, the stacked electrode... The stage 220 moves to the other side, and the diaphragm 130 on the stacking stage 220 automatically winds around the first electrode 110 to form a new diaphragm layer. The second electrode stage 240 then places the second electrode 120 on the new diaphragm layer and presses it with a clamping plate. After the second electrode 120 is stacked, the stacking stage 220 continues to move to the bottom of the first electrode stage 230 and drives the diaphragm 130 to automatically wind around the second electrode 120 to form another new diaphragm layer. This stacking process is repeated to complete the fabrication of the laminate 100. Before the first bottom electrode 111 is stacked, the stacking stage 220 moves to the spacer stage to stack the spacers. After the spacers are stacked, the first bottom electrode 111 is stacked on top of the spacers. The first electrode stage 230 and the spacer stage are located on the same side of the stacking stage 220. During the movement of the stacking stage 220 between the two, the separator 130 will not be wound to form a new separator layer, so that the first bottom electrode 111 and the spacers can be stacked smoothly.

[0174] In the fourth case, the stacking stage 220 has a travel distance that moves below the first electrode stage 230 and below the second electrode stage 240, and the spacer transfer device 300 is provided with a spacer transfer member.

[0175] Specifically, the first electrode stage 230 and the spacer stage are disposed on one side of the stacking stage 220, and the second electrode stage 240 is disposed on the other side of the stacking stage 220. By reciprocating between the first electrode stage 230 and the second electrode stage 240, the first electrode 110 and the second electrode 120 are alternately stacked. After the diaphragm bottom layer 131 is formed on the stacking stage 220, the spacer transfer member can directly transfer the spacer to above the diaphragm bottom layer 131. The stacking stage 220 then moves below the first electrode stage 230 to stack the first bottom electrode 111 above the spacer, and continues the subsequent stacking.

[0176] In other specific embodiments of the present invention, the laminated body device 200 includes:

[0177] Stacking table 220;

[0178] The diaphragm conveying assembly 210 is disposed above the stacking table 220 and is used to convey continuous diaphragms 130 to the stacking table 220;

[0179] The diaphragm stretching mechanism is located between the stacking table 220 and the diaphragm conveying assembly 210. The diaphragm stretching mechanism includes a first stretching assembly and a second stretching assembly, which are located on both sides of the diaphragm 130, respectively.

[0180] In this process, one of the first stretching component and the second stretching component reciprocates relative to the other, or the first stretching component and the second stretching component move toward each other to form a diaphragm laminate. A first placement position and a second placement position are formed between different diaphragm layers of the diaphragm laminate. The first placement position and the second placement position are alternately arranged along the lamination direction, and the uppermost and lowermost positions of the diaphragm laminate are both the first placement positions.

[0181] The first electrode stage 230 is used to transfer the first electrode 110 to the first placement position;

[0182] The second electrode stage 240 is used to transfer the second electrode 120 to the second placement position.

[0183] In this context, "moving in opposite directions" means that the first stretching assembly and the second stretching assembly move in opposite directions. During the formation of the diaphragm laminate, the first stretching assembly and the second stretching assembly move in opposite directions to tension the diaphragm laminate, facilitating the placement of the electrode sheets.

[0184] It is worth understanding that the diaphragm stretching mechanism will directly stretch and form the diaphragm laminate, and then the first electrode 110 and the second electrode 120 will be alternately inserted into the diaphragm laminate to form the laminate 100. After the laminate 100 is made, the diaphragm stretching mechanism will pull out the diaphragm 130, and the individual laminate 100 will be transferred.

[0185] Specifically, the first stretching assembly consists of a plurality of first stretching rollers evenly spaced along the vertical direction. The first stretching rollers form a portion of the winding portion 140 of the laminate 100 after stretching the diaphragm 130. The second stretching assembly consists of a plurality of second stretching rollers evenly spaced along the vertical direction. The second stretching rollers form another portion of the winding portion 140 of the laminate 100 after stretching the diaphragm 130.

[0186] In some other specific embodiments of the present invention, the laminate device 200 is used to form a laminate 100 having a diaphragm top layer 133, a top layer spacer 160, a first top layer electrode 112, a diaphragm sub-top layer 134 and a top layer winding portion 142, wherein the diaphragm top layer 133 and the diaphragm sub-top layer 134 are stacked, the top layer winding portion 142 is connected to the same side of the diaphragm top layer 133 and the diaphragm sub-top layer 134, and the first top layer electrode 112 is located between the diaphragm top layer 133 and the diaphragm sub-top layer 134;

[0187] The separator transfer device 300 is also used to transfer the top separator 160 between the top separator 133 and the first top electrode 112 to isolate the top separator 133 and the first top electrode 112.

[0188] The fracture element is also used to fracture the top layer winding portion 142 to separate the top layer of the diaphragm 133, the top layer spacer 160 and the first top layer electrode 112;

[0189] The control device is also configured to, after the first top electrode 112 is laminated in the laminate assembly 200, control the spacer transfer device 300 to transfer the top spacer 160 above the first top electrode 112; and after hot pressing in the hot pressing device, control the fracture member to break the top winding portion 142.

[0190] It is understandable that by adding a top layer spacer 160 between the first top layer electrode 112 and the top layer of the separator 133 of the laminate 100 through the spacer transfer device 300, and by adding a fracture element to the hot pressing device to fracture the top layer winding portion 142, the first top layer electrode 112 is separated from the top layer of the separator 133 and the top layer spacer 160, thus exposing the first top layer electrode 112. The overall modification of the equipment is minimal, and the improvement cost is low. Furthermore, the first top layer electrode 112 is also fixed by the separator 130 during the transfer process, making it less likely to shift and reduce alignment during the transfer process, thereby improving the overall electrode alignment of the laminate 100.

[0191] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A diaphragm Z-shaped stacked structure, characterized in that, include: A laminate (100) includes a diaphragm bottom layer (131), a bottom layer spacer (150), a first bottom layer electrode (111), a diaphragm sub-bottom layer (132), and a bottom layer winding portion (141). The diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132) are stacked together. The first bottom layer electrode (111) is located between the diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132). The bottom layer spacer (150) is located on the diaphragm bottom layer (131). Between the first bottom electrode (111) and the first bottom electrode (111), the bottom winding portion (141) is connected to the same side of the bottom electrode (131) and the second bottom electrode (132), and the bottom winding portion (141) has a bottom break position for breaking so that the bottom electrode (131) and the bottom spacer (150) are separated from the first bottom electrode (111).

2. The diaphragm Z-shaped stacked structure according to claim 1, characterized in that: The bottom winding section (141) includes a connecting section (1411), a winding section (1412), and an auxiliary cutting section (1413). The connecting section (1411) is connected to the bottom layer of the diaphragm (131) and the winding section (1412). The auxiliary cutting section (1413) is connected to the sub-bottom layer of the diaphragm (132) and the winding section (1412). The auxiliary cutting section (1413) has the bottom layer fracture position. The bottom layer spacer (150) includes an isolation section (151) and an auxiliary cutting section (152). The isolation section (151) is located between the bottom layer of the diaphragm (131) and the first bottom layer electrode (111). The auxiliary cutting section (152) is located between the connecting section (1411) and the auxiliary cutting section (1413).

3. The diaphragm Z-shaped stacked structure according to claim 2, characterized in that: The bottom partition (150) has a cutting positioning part on the side of the auxiliary cutting part (152) facing the auxiliary cutting section (1413), and the cutting positioning part corresponds to the bottom fracture position to locate the bottom fracture position.

4. The diaphragm Z-shaped stacked structure according to claim 1, characterized in that: The bottom winding portion (141) has a winding section (1412), the winding section (1412) is provided with the bottom break position, the bottom break position is used for the cutting member to cut along the width direction of the winding section (1412), or for the cutting member to cut along the side direction towards the winding section (1412).

5. The diaphragm Z-shaped stacked structure according to claim 1, characterized in that: The bottom partition (150) is a rigid partition, a flexible partition, or a composite of a rigid partition and a flexible partition.

6. The diaphragm Z-shaped stacked structure according to claim 1, characterized in that: The laminate (100) further includes a top diaphragm layer (133), a top diaphragm spacer (160), a first top diaphragm electrode (112), a second top diaphragm layer (134), and a top diaphragm winding portion (142). The top diaphragm layer (133) and the second top diaphragm layer (134) are stacked together. The first top diaphragm electrode (112) is located between the top diaphragm layer (133) and the second top diaphragm layer (134). The top diaphragm spacer (160) is located between the top diaphragm layer (133) and the first top diaphragm electrode (112) to isolate the top diaphragm layer (133) and the first top diaphragm electrode (112). The top diaphragm winding portion (142) is connected to the same side of the top diaphragm layer (133) and the second top diaphragm layer (134). The top diaphragm winding portion (142) has a top diaphragm break position for breaking to separate the top diaphragm layer (133) and the second top diaphragm layer (134).

7. A battery cell, characterized in that, Includes the diaphragm Z-shaped stacked structure as described in any one of claims 1 to 6.

8. A method for manufacturing an electrode wrapped with a laminate, characterized in that, The production steps include: S1: Prepare a laminate (100). The laminate (100) includes a diaphragm bottom layer (131), a bottom layer spacer (150), a first bottom layer electrode (111), a diaphragm sub-bottom layer (132), and a bottom layer winding portion (141). The diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132) are stacked. The first bottom layer electrode (111) is located between the diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132). The bottom layer spacer (150) is located between the diaphragm bottom layer (131) and the first bottom layer electrode (111). The bottom layer winding portion (141) is connected to the same side of the diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132). S2: The laminate (100) is hot-pressed; the bottom winding portion (141) is cut; S3: The membrane bottom layer (131) and the bottom layer spacer (150) are separated relative to the first bottom layer electrode (111).

9. The method for manufacturing an electrode outer layer stack according to claim 8, characterized in that, The laminate (100) further includes: a top membrane layer (133), a top layer spacer (160), a first top layer electrode (112), a second top membrane layer (134), and a top layer winding portion (142). The top membrane layer (133) and the second top membrane layer (134) are stacked together. The first top layer electrode (112) is located between the top membrane layer (133) and the second top membrane layer (134). The top layer spacer (160) is located between the top membrane layer (133) and the first top layer electrode (112). The top layer winding portion (142) is connected to the same side of the top membrane layer (133) and the second top membrane layer (134). The manufacturing steps of the electrode overlay method also include: S4: Cut the top layer winding portion (142); S5: The top layer spacer (160) and the top layer of the diaphragm (133) are separated from the first top layer electrode (112).

10. A diaphragm Z-shaped stacking device, characterized in that, include: A laminate assembly (200) is used to form a laminate (100), the laminate (100) including a diaphragm bottom layer (131), a bottom layer spacer (150), a first bottom layer electrode (111), a diaphragm sub-bottom layer (132) and a bottom layer winding portion (141), the diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132) being stacked, the first bottom layer electrode (111) being located between the diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132), the bottom layer spacer (150) being located between the first bottom layer electrode (111) and the diaphragm bottom layer (131), and the bottom layer winding portion (141) being connected to the same side of the diaphragm bottom layer (131) and the diaphragm sub-bottom layer (132); A spacer transfer device (300) is used to transfer the bottom spacer (150) between the bottom membrane layer (131) and the first bottom electrode (111) to isolate the bottom membrane layer (131) from the first bottom electrode (111); A hot pressing device for hot pressing the laminate (100) has a breaking member for breaking the bottom winding portion (141) so that the bottom spacer (150) and the diaphragm bottom layer (131) are separated from the first bottom electrode (111). A laminate transfer device for transferring the laminate (100) stacked by the laminate device (200) to the hot pressing device; A control device configured to, after the membrane bottom layer (131) is laminated in the laminate assembly (200), control the spacer transfer device (300) to transfer the bottom layer spacer (150) above the membrane bottom layer (131); after the laminate assembly (200) completes the fabrication of the laminate (100), control the laminate transfer device to transfer the laminate (100) onto the hot pressing device; and after hot pressing in the hot pressing device, control the fracture element to break the bottom layer winding portion (141).

11. The diaphragm Z-shaped stacking device according to claim 10, characterized in that: It also includes an auxiliary cutting component transfer device (400). The bottom winding portion (141) includes a connecting section (1411), a winding section (1412), and an auxiliary cutting section (1413). The connecting section (1411) is connected between the bottom layer of the diaphragm (131) and the winding section (1412). The auxiliary cutting section (1413) is connected between the second bottom layer of the diaphragm (132) and the winding section (1412). The auxiliary cutting section (1413) is used for the breaking component to break. The auxiliary cutting component transfer device (400) is used to transfer the auxiliary cutting component (410) between the auxiliary cutting section (1413) and the connecting section (1411). The control device is configured to transfer the auxiliary cutting member (410) between the auxiliary cutting section (1413) and the connecting section (1411) after the membrane bottom layer (131) is stacked in the laminated body device (200).

12. The diaphragm Z-shaped stacking device according to claim 10, characterized in that: It also includes an auxiliary clamping device (500). The bottom winding section (141) includes a connecting section (1411), a winding section (1412), and an auxiliary cutting section (1413). The connecting section (1411) is connected between the bottom layer of the diaphragm (131) and the winding section (1412). The auxiliary cutting section (1413) is connected between the second bottom layer of the diaphragm (132) and the winding section (1412). The auxiliary cutting section (1413) is used for the fracture of the fractured part. The auxiliary clamping device (500) is used to clamp the auxiliary cutting section (1413) and the connecting section (1411). The auxiliary clamping device (500) is configured to clamp the auxiliary cutting section (1413) and the connecting section (1411) after the bottom winding portion (141) is stacked in the laminated body device (200).

13. The diaphragm Z-shaped stacking device according to claim 10, characterized in that: The bottom winding section (141) includes a connecting section (1411), a winding section (1412), and an auxiliary cutting section (1413). The connecting section (1411) is connected between the bottom layer of the diaphragm (131) and the winding section (1412). The auxiliary cutting section (1413) is connected between the second bottom layer of the diaphragm (132) and the winding section (1412). The auxiliary cutting section (1413) is used for the fracture member to break. The bottom partition (150) includes an isolation section (151) and an auxiliary cutting section (152). The control device is configured to, after the membrane bottom layer (131) is stacked in the laminated body device (200), control the spacer transfer device (300) to transfer the isolation part (151) above the membrane bottom layer (131) and to transfer the auxiliary cutting part (152) between the connecting section (1411) and the auxiliary cutting section (1413).

14. The diaphragm Z-shaped stacking device according to any one of claims 10 to 13, characterized in that, The laminated body device (200) includes: A diaphragm delivery assembly (210) for delivering a continuous diaphragm (130); A stacking table (220) is disposed below the diaphragm conveying assembly (210) and is used to fix one end of the diaphragm (130); In this process, one of the stacking stage (220) and the diaphragm conveying assembly (210) reciprocates relative to the other, or the stacking stage (220) and the diaphragm conveying assembly (210) move toward each other to form a diaphragm laminate. A first placement position and a second placement position are formed between different diaphragm layers of the diaphragm laminate. The first placement position and the second placement position are alternately arranged along the stacking direction, and the uppermost and lowermost positions of the diaphragm laminate are both the first placement positions. The first electrode stage (230) is used to transfer the first electrode (110) to the first placement position; The second electrode stage (240) is used to transfer the second electrode (120) to the second placement position.

15. The diaphragm Z-shaped stacking device according to any one of claims 10 to 13, characterized in that, The laminated body device (200) includes: Stacking table (220); A diaphragm conveying assembly (210) is disposed above the stacking table (220) for conveying continuous diaphragms (130) to the stacking table (220); A diaphragm stretching mechanism is located between the stacking table (220) and the diaphragm conveying assembly (210). The diaphragm stretching mechanism includes a first stretching assembly and a second stretching assembly, which are located on both sides of the diaphragm (130), respectively. In this process, one of the first stretching component and the second stretching component reciprocates relative to the other, or the first stretching component and the second stretching component move toward each other to form a diaphragm laminate. A first placement position and a second placement position are formed between different diaphragm layers of the diaphragm laminate. The first placement position and the second placement position are alternately arranged along the lamination direction, and the uppermost and lowermost positions of the diaphragm laminate are both the first placement positions. The first electrode stage (230) is used to transfer the first electrode (110) to the first placement position; The second electrode stage (240) is used to transfer the second electrode (120) to the second placement position.

16. The diaphragm Z-shaped stacking device according to any one of claims 10 to 13, characterized in that: The laminate assembly (200) is used to form the laminate (100) having a top membrane layer (133), a top membrane spacer (160), a first top membrane electrode (112), a second top membrane layer (134), and a top membrane winding portion (142). The top membrane layer (133) and the second top membrane layer (134) are stacked together. The top membrane winding portion (142) is connected to the same side of the top membrane layer (133) and the second top membrane layer (134). The first top membrane electrode (112) is located between the top membrane layer (133) and the second top membrane layer (134). The spacer transfer device (300) is also used to transfer the top layer spacer (160) between the top layer of the diaphragm (133) and the first top layer electrode (112) to isolate the top layer of the diaphragm (133) from the first top layer electrode (112); The fracture element is also used to fracture the top layer winding portion (142) to separate the top layer of the diaphragm (133), the top layer spacer (160) and the first top layer electrode (112); The control device is also configured to, after the first top electrode (112) is laminated in the laminated body device (200), control the spacer transfer device (300) to transfer the top spacer (160) above the first top electrode (112); and after the hot pressing device is hot pressing, control the fracture device to break the top winding portion (142).

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