Battery positive electrode bag manufacturing apparatus, laminated lithium battery, and method of manufacturing the same

Abstract

This invention aims to provide a battery positive electrode bag manufacturing equipment, a stacked lithium battery, and a battery manufacturing method. The battery includes a core pack and an aluminum-plastic film. The core pack includes multiple positive electrode bags and multiple negative electrode sheets. Each positive electrode bag and each negative electrode sheet is stacked alternately to form the core pack. The number of negative electrode sheets is N, the number of positive electrode bags is N+1, and N is a positive integer. Each positive electrode bag includes a separator bag and a positive electrode sheet. A separator cavity is formed inside the separator bag. The positive electrode sheet is adapted to be accommodated in the separator cavity. The aluminum-plastic film covers the outer wall of the core pack so that the positive electrode tabs of each positive electrode sheet and the negative electrode tabs of each negative electrode sheet protrude from the aluminum-plastic film. The core pack and the aluminum-plastic film are bent into an arc shape as a whole. In this way, after the separator and positive electrode are made into a positive electrode bag, they are then made into a core package, which can meet the needs of smart rings with small batteries. This facilitates production and manufacturing, and the resulting battery has good stability. It can effectively avoid the problem of short circuit between the aluminum layer of the internal aluminum-plastic film and the positive / negative electrode.

Description

Technical Field

[0001] This invention relates to the technical field of stacked lithium batteries, and in particular to a battery positive electrode bag manufacturing apparatus, a stacked lithium battery, and a method for manufacturing the battery. Background Technology

[0002] Stacked lithium batteries are batteries in which positive and negative electrodes and separators are stacked alternately in a "positive electrode-separator-negative electrode-separator" configuration to form a cell. This is a common structure in rechargeable lithium batteries. Currently, they are commonly found in square / pouch power batteries and energy storage batteries. The overall manufacturing process is roughly divided into three stages: front-end electrode manufacturing, mid-stage cell assembly, and back-end formation and capacity testing. Mid-stage cell assembly refers to the process of stacking the positive electrode and separator to form a stack, which generally includes stacking, tab welding, casing / packaging, electrolyte injection, and settling / immersion. Stacking refers to the aforementioned "positive electrode-separator-negative electrode-separator" stacking process.

[0003] For example, Chinese patent document CN120709518A discloses an arc-shaped battery, which includes:

[0004] A battery cell, the battery cell including a first side and a second side disposed opposite to each other along a first direction, the second side of the battery cell being bent toward the first side of the battery cell; The battery cell includes a separator and an electrode, the electrode includes a positive electrode and a negative electrode, the separator includes a plurality of separator layers disposed along the first direction, and a single electrode is sandwiched between two adjacent separator layers; Each of the membrane layers includes a first side and a second side disposed opposite to each other along a second direction. In three adjacent membrane layers, the first side of the first membrane layer is adjacent to the first side of the second membrane layer, and the second side of the second membrane layer is adjacent to the second side of the third membrane layer. A cut is provided between two adjacent first sides and between two adjacent second sides, and the cut extends in a third direction; Wherein, the first direction is along the radial direction of the arc-shaped battery, one of the second direction and the third direction is along the axial direction of the arc-shaped battery, and the other is along the circumferential direction of the arc-shaped battery.

[0005] With the continuous development of smart wearable devices, smart rings have emerged. Smart rings are fingertip wearable devices integrating miniature sensors, low-power chips, and wireless communication. They emphasize seamless wearing, long battery life, and accurate health monitoring, and are becoming the next generation of mainstream smart wearables after smartwatches. Compared to smartwatches, smart rings are smaller, meaning their batteries are also smaller. To ensure a more snug fit on the ring, the battery needs to be designed with a curved structure.

[0006] However, existing curved batteries have the following shortcomings: Due to the small internal space of smart rings, the battery size also needs to be miniaturized, but the existing Z-shaped stacked structure cannot meet the requirements of small battery manufacturing. Specifically, because any two adjacent separators are connected, as the width of the battery electrode decreases (for example, when the width of the battery electrode is 5mm), folding the separator in a Z-shape makes it difficult for the folding tool to position and fold the separator, hindering effective production. Secondly, to minimize the battery volume, the width of the electrode and separator must be minimized. Therefore, when the separator and electrode are stacked to form a core package, bending the core package increases the misalignment at both ends of the separator and electrode along the length direction. Consequently, when the core package is inserted into the aluminum-plastic film, the separator cannot effectively cover and isolate the electrode. After heat sealing, the inner PP layer of the aluminum-plastic film melts, easily causing contact between the aluminum layer of the aluminum-plastic film and the electrode. In view of this, in order to solve the problem of the high difficulty in manufacturing such micro batteries (width no more than 5mm), the present application proposes a battery positive electrode bag manufacturing equipment, a stacked lithium battery, and a battery manufacturing method. Summary of the Invention

[0007] The purpose of this invention is to overcome the shortcomings of the prior art and provide a battery positive electrode bag manufacturing equipment, a stacked lithium battery, and a battery manufacturing method that are easy to manufacture and have a reliable structure.

[0008] The objective of this invention is achieved through the following technical solution: A stacked lithium battery, comprising: A core package includes multiple positive electrode bags and multiple negative electrode plates, wherein each positive electrode bag and each negative electrode plate are stacked alternately to form a core package, wherein the number of negative electrode plates is N, the number of positive electrode bags is N+1, and N is a positive integer, each positive electrode bag includes a diaphragm bag and a positive electrode plate, the diaphragm bag has a diaphragm cavity, and the positive electrode plate is adapted to be accommodated in the diaphragm cavity; An aluminum-plastic film is used to cover the outer wall of the core package, so that the positive tabs of each positive electrode and the negative tabs of each negative electrode protrude from the aluminum-plastic film, and the core package and the aluminum-plastic film are bent into an arc shape as a whole.

[0009] A method for manufacturing a stacked lithium battery, comprising the following steps: Step S10: Obtain multiple positive electrode bags, wherein each positive electrode bag includes a diaphragm bag and a positive electrode sheet embedded in the diaphragm bag; Step S20: Obtain multiple negative electrode sheets, and then hot-press each of the separator bags and each of the negative electrode sheets in a staggered manner to obtain a core package, wherein the number of negative electrode sheets is N, the number of positive electrode bags is N+1, and N is a positive integer; Step S30: Bend the core package so that the core package is bent into an arc shape; Step S40: Obtain aluminum-plastic film, punch pits in the aluminum-plastic film to form recesses inside the aluminum-plastic film, wherein the recesses are bent into an arc shape. Step S50: The core package is placed into the recess, and after side sealing / top sealing, baking, liquid injection, pre-sealing, and second sealing, a stacked lithium battery is obtained.

[0010] A battery positive electrode bag manufacturing apparatus for manufacturing the aforementioned positive electrode bag, comprising: substrate; A diaphragm conveying assembly includes a sealing carrier plate, a cutting carrier plate, a film-joining drive, a film-joining slide plate, a bottom film conveying mechanism, and a top film conveying mechanism. The sealing carrier plate and the cutting carrier plate are spaced apart on a substrate. The film-joining slide plate is slidably disposed on the substrate. The film-joining drive is disposed on the substrate, and the output shaft of the film-joining drive is connected to the film-joining slide plate. The bottom film conveying mechanism and the top film conveying mechanism are both disposed on the substrate. The bottom film conveying mechanism drives the bottom film to pass sequentially through the sealing carrier plate and the cutting carrier plate. The top film conveying mechanism drives the top film to pass sequentially through the film-joining slide plate and the sealing carrier plate. When the film-joining drive drives the film-joining slide plate to reciprocate relative to the sealing carrier plate, the film-joining slide plate causes the top film to open or close relative to the bottom film. When the top film is open relative to the bottom film, the positive electrode sheet can be placed on the bottom film. A sealing assembly, comprising a sealing drive and a sealing block, wherein the sealing drive is disposed on the film bonding slide plate and the sealing block is disposed on the output shaft of the sealing drive, and the sealing drive is used to drive the sealing block to abut against the sealing carrier plate, so that the sealing block seals the cover film and the bottom film along the edge of the positive electrode sheet. A cutting assembly, comprising a cutting drive and a cutting block, wherein the cutting drive is disposed on the substrate and the cutting block is disposed on the output shaft of the cutting drive, and the cutting drive is used to drive the cutting block to abut against the cutting carrier plate, so that the cutting block cuts the cover film and the bottom film to obtain a positive electrode bag.

[0011] Optionally, the bottom film conveying mechanism includes a feeding wheel, a feeding drive, a taking-up wheel, and a taking-up drive. The feeding drive is disposed on the substrate, and the feeding wheel is disposed on the output shaft of the feeding drive. The feeding drive is used to drive the feeding wheel to rotate. The taking-up drive is disposed on the substrate, and the taking-up wheel is disposed on the output shaft of the taking-up drive. The taking-up drive is used to drive the taking-up wheel to rotate. The feeding wheel is used to release the bottom film, which passes sequentially through the sealing carrier plate and the cutting carrier plate, and then is wound onto the taking-up wheel.

[0012] Optionally, the bottom film conveying mechanism further includes a tensioning member disposed on the substrate, the tensioning member being used to tension the bottom film.

[0013] Optionally, the film-closing slide plate is rotatably provided with a plurality of guide shafts, which are used to guide the cover film.

[0014] Optionally, the sealing film carrier plate is provided with a baffle strip, so that a material passage groove is formed between the baffle strip and the sealing film carrier plate, and the baffle strip is used to block the cover film.

[0015] Optionally, the battery positive electrode bag manufacturing equipment further includes a feeding assembly, which includes a feeding plate, a feeding fixture, a feeding drive, a picking drive, and a picking member. The feeding plate is disposed on the substrate, and the feeding fixture is detachably disposed on the feeding plate. The feeding fixture is used to accommodate the positive electrode sheet. The feeding drive is disposed on the substrate and is used to drive the positive electrode sheet in the feeding fixture through the feeding plate. The picking drive is disposed on the film-sealing slide plate, and the picking member is disposed on the output shaft of the picking drive. The picking drive is used to drive the picking member to perform lifting and lowering movements. When the film-sealing slide plate reciprocates, it drives the picking member to reciprocate between the feeding plate and the sealing carrier plate.

[0016] Optionally, the battery positive electrode bag manufacturing equipment further includes a detection component, which includes a detection carrier plate, a detection drive, a pressure sensor, and a suction component. The detection carrier plate is disposed on the substrate and is used to support the positive electrode sheet. The detection drive is disposed on the film-sealing slide plate and is located between the material-taking drive and the film-sealing drive. The pressure sensor is disposed on the output shaft of the detection drive and the suction component is disposed on the output shaft of the pressure sensor. When the detection drive drives the suction component to descend, the suction component abuts against the detection carrier plate.

[0017] Optionally, the battery positive electrode bag manufacturing equipment further includes an adjustment transparent plate, an adjustment drive unit, and a first camera. The adjustment drive unit is disposed on the substrate, the adjustment transparent plate is disposed on the adjustment drive unit, and the adjustment transparent plate is located between the detection carrier plate and the sealing carrier plate. The adjustment transparent plate is used to carry the positive electrode sheet. The first camera is disposed on the substrate and is located below the adjustment transparent plate. The first camera is used to take pictures and detect the adjustment transparent plate and the positive electrode sheet.

[0018] Compared with the prior art, the present invention has at least the following advantages: The separator between the positive and negative electrodes is not the commonly seen Z-shaped structure. Instead, the separator and the positive electrode are made into a positive electrode bag, and then several positive electrode bags and negative electrodes are stacked alternately to form a core package. Therefore, it can meet the needs of smart rings with small batteries, and it is easy to manufacture. The battery produced has good stability and can effectively avoid the problem of short circuit between the aluminum layer of the internal aluminum-plastic film and the positive / negative electrode. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic cross-sectional view of a stacked lithium battery according to one embodiment of the present invention. Figure 2 This is a cross-sectional structural diagram of a core package according to an embodiment of the present invention; Figure 3 This is a front view of the positive electrode bag according to an embodiment of the present invention; Figure 4 This is a schematic flowchart of a method for manufacturing a stacked lithium battery according to one embodiment of the present invention. Figure 5 This is a schematic diagram of a battery positive electrode bag manufacturing apparatus according to an embodiment of the present invention; Figure 6 for Figure 5 The diagram shows the rear structure of the battery positive electrode bag manufacturing equipment. Figure 7 for Figure 5 The image shows a front view of the battery positive electrode bag manufacturing equipment with the cover film and bottom film open. Figure 8 for Figure 5The image shows a front view of the battery positive electrode bag manufacturing equipment in the state of laminating the cover film and the bottom film; Figure 9 This is a schematic diagram of the structure of a sealing block according to one embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of a cutting block according to an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of a feeding assembly according to one embodiment of the present invention; Figure 12 This is a cross-sectional view of a partial structure of a detection component according to an embodiment of the present invention; Figure 13 This is a partial cross-sectional view of a detection carrier plate according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the feeding assembly according to one embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 100. Stacked lithium battery; 110. Cell pack; 120. Aluminum-plastic film; 111. Positive electrode bag; 112. Negative electrode sheet; 111a. Separator bag; 111b. Positive electrode sheet; 200. Battery positive electrode bag manufacturing equipment; 210. Substrate; 220. Separator conveying assembly; 230. Sealing assembly; 240. Cutting assembly; 221. Sealing carrier plate; 222. Cutting carrier plate; 223. Film closing drive; 224. Film closing slide plate; 225. Bottom film conveying mechanism; 226. Cover film conveying mechanism 21. Bottom film; 22. Cover film; 231. Sealing drive; 232. Sealing block; 241. Cutting drive; 242. Cutting block; 2321. Hot pressing section; 2421. Blade; 2251. Feeding roller; 2252. Feeding drive; 2253. Receiving roller; 2254. Receiving drive; 2255. Tensioning component; 227. Guide shaft; 229. Pressing drive; 2210. Pressing roller; 22551. Tensioning slider; 22552. Tensioning shaft; 228. Stop 250. Feeding assembly; 251. Feeding plate; 252. Feeding fixture; 253. Feeding drive; 254. Picking drive; 255. Picking component; 2511. First material hole; 2531. Top rod; 2551. Suction cup; 2552. Picking rod; 260. Detection assembly; 261. Detection carrier plate; 262. Detection drive; 263. Pressure sensor; 264. Suction component; 265. Support block; 266. Spring; 2611. Receiving chute; 2612. Outlet 271. Air vent; 272. Adjustment transparent plate; 273. Adjustment drive unit; 274. First camera; 281. Material transfer drive unit; 282. Material transfer unit; 290. Unloading assembly; 291. Light board; 292. Unloading plate; 293. Unloading fixture; 294. Unloading drive unit; 298. Unloading rod; 295. Unloading drive unit; 296. Second camera; 297. Unloading unit; 2951. Lateral slide plate; 2952. Lifting drive unit; 2953. Lifting slide plate; 2954. Lateral module. Detailed Implementation

[0022] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention.

[0023] like Figures 1 to 3As shown, a stacked lithium battery 100 includes a core pack 110 and an aluminum-plastic film 120. The core pack 110 includes multiple positive electrode bags 111 and multiple negative electrode sheets 112. Each positive electrode bag 111 and each negative electrode sheet 112 are stacked alternately to form the core pack 110. The number of negative electrode sheets 112 is N, and the number of positive electrode bags 111 is N+1, where N is a positive integer. Each positive electrode bag 111 includes a separator bag 111a and a positive electrode sheet 111b. A separator cavity is formed inside the separator bag 111a, and the positive electrode sheet 111b is adapted to be accommodated in the separator cavity. The aluminum-plastic film 120 covers the outer wall of the core pack 110 so that the positive electrode tabs of each positive electrode sheet 111b and the negative electrode tabs of each negative electrode sheet 112 protrude from the aluminum-plastic film 120. The core pack 110 and the aluminum-plastic film 120 are bent into an arc shape as a whole.

[0024] It should be noted that, compared to the existing structure in which the separator is set in a Z-shape and the positive and negative electrodes are separated by the separator in sequence, the technical solution provided in this application is to make the separator into a bag shape, namely separator bag 111a, and then put the positive electrode 111b into the separator bag 111a to form a positive electrode bag 111. In this way, for the positive electrode bag 111, it only has the separator structure and the positive electrode tab to the outside. Therefore, when each positive electrode bag 111 and each negative electrode 112 are stacked alternately, the structure presented is also that the positive electrode 111b and the negative electrode 112 are stacked alternately, and any adjacent positive electrode 111b and negative electrode 112 are separated by the separator. However, compared to the existing Z-shaped diaphragm structure, when the positive electrode bag 111 is bent into an arc shape under force, it can always ensure that the diaphragm bag 111a contains the positive electrode plate 111b, that is, ensure that the diaphragm reliably covers the positive electrode plate 111b. Specifically, when the core pack 110 is inserted into the aluminum-plastic film 120, the inner layer melts as the aluminum-plastic film 120 is heat-sealed. It should be noted that the melting point of the inner layer of the aluminum-plastic film 120 will be closer to one side of the core pack 110. Since the number of positive electrode bags 111 is always one more than the number of negative electrode plates 112, that is, the outermost layers on both sides of the core pack 110 must be positive electrode bags 111. In other words, the positive electrode bags 111 will be closest to the melting point of the inner layer of the aluminum-plastic film 120. Therefore, since the positive electrode plate 111b in the positive electrode bag 111 is reliably covered by the separator bag 111a, and the outermost negative electrode plate 112 is still separated by the outermost positive electrode bag 111, it can effectively prevent the aluminum layer in the aluminum-plastic film 120 from contacting and short-circuiting with the positive electrode plate 111b and the negative electrode plate 112. Therefore, for small-volume lithium batteries, such as lithium batteries with a width of less than 5mm, the stacked lithium battery 100 structure of this application is not only easy to manufacture, but also has a reliable structure and effectively avoids internal contact short circuits.

[0025] In one embodiment, there are 3 negative electrode sheets 112, and 4 positive electrode bags 111. The 4 positive electrode bags 111 and 3 negative electrode sheets 112 are stacked alternately. In another embodiment, there are 5 negative electrode sheets 112, and 6 positive electrode bags 111. The 6 positive electrode bags 111 and 5 negative electrode sheets 112 are stacked alternately.

[0026] like Figure 4 As shown, a method for manufacturing a stacked lithium battery includes the following steps: Step S10: Obtain multiple positive electrode bags, each positive electrode bag including a diaphragm bag and a positive electrode plate embedded in the diaphragm bag; Step S20: Obtain multiple negative electrode sheets, and then hot-press each separator bag and each negative electrode sheet in an alternating manner to obtain a core package. The number of negative electrode sheets is N, the number of positive electrode bags is N+1, and N is a positive integer. Step S30: Bend the core package so that it bends into an arc shape; Step S40: Obtain aluminum-plastic film, punch pits in the aluminum-plastic film to form recesses inside the aluminum-plastic film, wherein the recesses are curved to be arc-shaped; In step S50, the core pack is placed into the recess, and after side sealing / top sealing, baking, liquid injection, pre-sealing, and second sealing, a stacked lithium battery is obtained.

[0027] It should be noted that in step S10, the positive electrode bag includes a separator bag and a positive electrode sheet wrapped inside the separator bag. For example, the separator bag is made of polypropylene (PP) / polyethylene (PE) composite separator with a thickness of 12-25 μm, preferably 18 μm. The length of the separator bag is 0.5 mm to 1.5 mm longer than the positive electrode sheet, and the width is 0.5 mm to 1.5 mm wider than the positive electrode sheet, ensuring that the positive electrode sheet can be completely wrapped by the separator bag, avoiding direct contact between the positive electrode sheet and the negative electrode sheet during subsequent stacking and preventing short circuits. At the same time, it minimizes the size difference between the separator bag and the positive electrode sheet, thereby minimizing the size of the core package. Furthermore, both the positive electrode sheet and the negative electrode sheet are made of existing materials, so their materials are not the subject of protection in this application, and their material composition will not be described here. Furthermore, the tabs of the positive electrode sheet all extend from one end of the separator bag to facilitate the electrical connection of the tabs of the positive electrode sheets in multiple positive electrode bags in the future.

[0028] Further, in step S20, the core pack is manufactured. Specifically, the number of positive electrode bags is always one greater than the number of negative electrode sheets. Therefore, it is ensured that both ends of the stacking direction are positive electrode bags, that is, the stacking is carried out in the order of positive electrode bag, negative electrode sheet, positive electrode bag, negative electrode sheet, ..., negative electrode sheet, positive electrode bag. In this invention, the number of N is preferably 3 to 6. After the stacking is completed, hot pressing is performed. The hot pressing temperature is 80-100℃, the hot pressing pressure is 0.5-1.0MPa, and the hot pressing time is 5-10s. This ensures that the stacked layers are tightly bonded, reduces the voids inside the core pack, improves the structural stability and energy density of the core pack, and avoids interlayer separation during subsequent bending.

[0029] Further, step S30 involves bending the core pack. Specifically, a bending die is used to bend the core pack. The bending die includes an upper die and a lower die. The lower die has an arc-shaped groove, the radius of curvature of which is set according to the external dimensions of the target lithium battery. During the bending process, the core pack is placed in the arc-shaped groove, and the upper and lower dies are controlled to interlock. Pressure is slowly applied at a predetermined bending pressure, bending time, and bending temperature to gradually bend the core pack until it fits against the arc-shaped groove. In one embodiment, the bending pressure is 0.4 MPa, the bending time is 4 seconds, and the bending temperature is 30°C.

[0030] Further, in step S40, the aluminum-plastic film is perforated. As the outer casing of the lithium battery, the aluminum-plastic film is perforated with arc-shaped recesses to ensure the curved core pack can be fitted into the casing. Specifically, the aluminum-plastic film has an existing structure, so its layered structure will not be described in detail. The punch used for perforation has an arc-shaped structure, and its radius of curvature matches the radius of curvature of the bent core pack. The punch, driven by a perforation machine, perforates the aluminum-plastic film at a predetermined pressure, a predetermined perforation speed, and a predetermined perforation temperature. In one embodiment, the perforation pressure is 1.5 MPa, the perforation speed is 8 mm / s, and the perforation temperature is 27°C.

[0031] Finally, in step S50, the core pack and the aluminum-plastic film with the punched indentation are encapsulated to prepare the finished battery. It is only necessary to ensure that the curved core pack matches the curved indentation; the specific manufacturing parameters involved in side sealing / top sealing, baking, electrolyte injection, pre-sealing, and secondary sealing can be set according to existing lithium battery production parameters. This application focuses on protecting the core pack forming process; therefore, the processes of side sealing / top sealing, baking, electrolyte injection, pre-sealing, and secondary sealing are not described in detail.

[0032] Thus, the stacked lithium battery manufacturing method of this application wraps the positive electrode sheet in a separator bag to form a positive electrode bag, and then stacks it alternately with the negative electrode sheet, effectively avoiding direct contact between the positive and negative electrodes and improving the safety of the lithium battery; adopting a stacking method of "N negative electrodes and N+1 positive electrode bags" ensures that both ends of the stacking direction of the core pack are positive electrode bags, that is, the positive electrode sheet and the aluminum-plastic film are separated by a separator, further improving the safety and stability of the lithium battery; by designing the indentations of the core pack and the aluminum-plastic film in an arc shape, the manufactured lithium battery is arc-shaped, which is suitable for special curved application scenarios such as smart rings, improving space utilization.

[0033] like Figures 5 to 10 As shown, a battery positive electrode bag manufacturing apparatus 200 is used to manufacture a positive electrode bag 111. It includes a substrate 210, a separator conveying assembly 220, a sealing assembly 230, and a cutting assembly 240. The separator conveying assembly 220 includes a sealing carrier plate 221, a cutting carrier plate 222, a film-closing drive 223, a film-closing slide plate 224, a bottom film conveying mechanism 225, and a top film conveying mechanism 226. The sealing carrier plate 221 and the cutting carrier plate 222 are spaced apart on the substrate 210, and the film-closing slide plate 224 is slidably disposed on the substrate 210. On substrate 210, a film-coating drive 223 is mounted on the substrate 210, and the output shaft of the film-coating drive 223 is connected to the film-coating slide plate 224. The bottom film conveying mechanism 225 and the cover film conveying mechanism 226 are both mounted on the substrate 210. The bottom film conveying mechanism 225 drives the bottom film 21 to pass sequentially through the sealing carrier plate 221 and the cutting carrier plate 222. The cover film conveying mechanism 226 drives the cover film 22 to pass sequentially through the film-coating slide plate 224 and the sealing carrier plate 221. The film-coating drive 223 drives the film-coating slide plate 224 relative to the substrate 210. When the sealing carrier plate 221 reciprocates, the film-closing slide plate 224 causes the cover film 22 to open or close relative to the bottom film 21. When the cover film 22 is open relative to the bottom film 21, the positive electrode 111b can be placed on the bottom film 21. The sealing assembly 230 includes a sealing drive 231 and a sealing block 232. The sealing drive 231 is disposed on the film-closing slide plate 224, and the sealing block 232 is disposed on the output shaft of the sealing drive 231. The sealing drive 231 is used to drive the sealing block 232 to abut against the bottom film 21. When sealing the carrier plate 221, the sealing block 232 seals the cover film 22 and the bottom film 21 along the edge of the positive electrode 111b. The cutting assembly 240 includes a cutting drive 241 and a cutting block 242. The cutting drive 241 is disposed on the substrate 210, and the cutting block 242 is disposed on the output shaft of the cutting drive 241. When the cutting drive 241 drives the cutting block 242 to abut against the cutting carrier plate 222, the cutting block 242 cuts the cover film 22 and the bottom film 21 to obtain the positive electrode bag 111.

[0034] It should be noted that the substrate 210 is fixedly installed vertically, and the sealing carrier plate 221 and the cutting carrier plate 222 are both fixedly installed on the substrate 210, with a gap between them. The film-fitting slide plate 224 is slidably installed on the substrate 210 via a slide rail, and is located above the sealing carrier plate 221. The film-fitting drive unit 223 is fixedly installed on the back side of the substrate 210. The film-fitting drive unit 223 is used to drive the film-fitting slide plate 224 to reciprocate laterally. In one embodiment, the film-fitting drive unit 223 is a motor-driven lead screw module, which allows the film-fitting drive unit 223 to precisely control the lateral sliding accuracy of the film-fitting slide plate 224. A bottom film conveying mechanism 225 is mounted on the substrate 210 and located below the sealing carrier plate 221. The bottom film conveying mechanism 225 releases the bottom film, allowing it to pass sequentially through the sealing carrier plate 221 and the cutting carrier plate 222. Further, a cover film conveying mechanism 226 is mounted on the substrate 210 and located above the film-joining slide plate 224. The cover film conveying mechanism 226 releases the cover film 22, allowing it to pass sequentially through the film-joining slide plate 224 and the sealing carrier plate 221, whereby the cover film 22 and the bottom film 21 are thermally bonded together by the sealing assembly 230 at the sealing carrier plate 221. It should be noted that both the bottom film 21 and the cover film 22 are made of diaphragm material and are in roll form. Thus, when the laminating slide 224 is driven to slide closer to the cutting carrier plate 222, the laminating slide 224 causes the cover film 22 to open relative to the bottom film 21. At this time, the positive electrode 111b can be placed on the bottom film 21. Then, the laminating slide 224 is driven away from the cutting carrier plate 222, causing the laminating slide 224 to laminate the cover film 22 onto the bottom film 21. At this time, the positive electrode 111b placed on the bottom film 21 will be covered by the cover film 22, and the bottom film 21 and the cover film 22 will overlap to form a composite structure. Next, the sealing drive 231 installed on the laminating slide 224 is located above the sealing carrier plate 221. Then, the sealing drive 231 drives the sealing block 232 to descend, causing the sealing block 232 to descend and abut against the sealing carrier plate 221, thereby causing the sealing block 232 to perform heat-press sealing of the cover film 22 and the bottom film 21 located on the sealing carrier plate 221. Specifically, a heating element is installed inside the sealing block 232, which heats the sealing block 232 to a predetermined temperature, such as 120°C. Further, a hot-pressing part 2321 is formed on the side of the sealing block 232 near the sealing carrier plate 221. The hot-pressing part 2321 has the same outline shape as the positive electrode 111b, but its size is larger than that of the positive electrode 111b. The hot-pressing part 2321 hot-presses the outer periphery of the positive electrode 111b, thereby hot-pressing and welding the cover film 22 and the bottom film 21 together, and the positive electrode 111b is then welded and fixed by the cover film 22 and the bottom film 21. Moreover, after the cover film 22 and the bottom film 21 are hot-pressed and fixed by the sealing block 232, they form an integral double-layer separator strip.Next, the bottom film conveying mechanism 225 moves the double-layer diaphragm belt to the cutting carrier plate 222. Then, the cutting drive 241 drives the cutting block 242 to descend, so that the cutting block 242 abuts against the cutting carrier plate 222 to complete the punching. In one embodiment, a blade 2421 is provided on the side of the cutting block 242 near the cutting carrier plate 222, wherein the outline shape of the blade 2421 is consistent with the outline shape of the hot pressing part 2321, except that the outline size of the blade 2421 is larger than the outline size of the positive electrode 111b and smaller than the maximum outline size of the hot pressing part 2321. In this way, the cutting block 242 moves downward to cut off the cover film 22 and the bottom film 21 at the same time, so that the position where the positive electrode 111b is located, together with the cover film 22 and the bottom film 21, forms a positive electrode bag 111. Next, the positive electrode bag 111 is removed from the cutting carrier plate 222, and the remaining portion of the double-layer separator tape after cutting forms a continuous waste separator tape, which is then wound up and recycled by the bottom film conveying mechanism 225. In this way, by sequentially stacking the obtained positive electrode bag 111 and negative electrode sheet 112, the core package 110 can be obtained. In one embodiment, the sealing drive 231 and the cutting drive 241 are both linear cylinders.

[0035] like Figures 5 to 8 As shown, in one embodiment, the bottom film conveying mechanism 225 includes a feeding roller 2251, a feeding drive 2252, a receiving roller 2253, and a receiving drive 2254. The feeding drive 2252 is disposed on the substrate 210, and the feeding roller 2251 is disposed on the output shaft of the feeding drive 2252. The feeding drive 2252 is used to drive the feeding roller 2251 to rotate. The receiving drive 2254 is disposed on the substrate 210, and the receiving roller 2253 is disposed on the output shaft of the receiving drive 2254. The receiving drive 2254 is used to drive the receiving roller 2253 to rotate. The feeding roller 2251 is used to release the bottom film 21, which passes sequentially through the sealing carrier plate 221 and the cutting carrier plate 222, and then is wound onto the receiving roller 2253.

[0036] It should be noted that, for example, the feeding drive 2252 and the receiving drive 2254 are both motor-driven rotating shaft structures, with the feeding wheel 2251 and the receiving wheel 2253 mounted on the rotating shaft. Thus, the feeding drive 2252 drives the feeding wheel 2251 to rotate and release the bottom film 21. The bottom film 21 passes through the sealing carrier plate 221, allowing the positive electrode sheet 111b to be placed on the bottom film 21. Then, the sealing drive 231 drives the sealing block 232 to laminate the cover film 22 onto the bottom film 21. The bottom film 21, cover film 22, and positive electrode sheet 111b are then synchronously transferred to the cutting carrier plate 222, where the cutting drive 241 drives the cutting block 242 to descend and perform cutting. Finally, the resulting diaphragm waste strip is wound onto the receiving wheel 2253. Thus, by cooperating with each other, the feeding drive 2252 and the receiving drive 2254 allow the released bottom film 21 to slowly pass through the sealing carrier plate 221 and the cutting carrier plate 222, so that it can be combined with the cover film 22 and then cut to obtain the positive electrode bag 111.

[0037] like Figure 5 As shown, in one embodiment, the bottom film conveying mechanism 225 further includes a tensioning member 2255, which is disposed on the substrate 210 and is used to tension the bottom film 21.

[0038] It should be noted that, in order to ensure the flatness of the lamination between the base film 21 and the cover film 22, the base film 21 needs to be transferred with a certain degree of tension. Therefore, a tensioning element 2255 is provided to tension the base film 21. It should be noted that multiple tensioning elements 2255 can be provided as needed. For example, one tensioning element 2255 can be provided between the feeding roller 2251 and the sealing carrier plate 221, another between the sealing carrier plate 221 and the cutting carrier plate 222, and yet another between the cutting carrier plate 222 and the receiving roller 2253. Thus, providing multiple tensioning elements 2255 can effectively improve the tension of the base film 21 during transfer.

[0039] like Figure 5 , Figure 7 , Figure 8 As shown, in one embodiment, a plurality of guide shafts 227 are rotatably provided on the film-closing slide plate 224, and the guide shafts 227 are used to guide the cover film 22.

[0040] It should be noted that, for example, one end of the guide shaft 227 is rotatably mounted to the film-coating slide plate 224 via a bearing, meaning the guide shaft 227 can rotate repeatedly relative to the film-coating slide plate 224. In one embodiment, four guide shafts 227 are provided on the film-coating slide plate 224. Thus, with two guide shafts 227 as a group, two groups of guide shafts 227 guide the cover film 22. Thus, when the film-coating slide plate 224 slides laterally back and forth relative to the substrate 210, the guide shafts 227 can drive the cover film 22 to reciprocate laterally relative to the sealing carrier plate 221. When the cover film 22 is slid close to the cutting carrier plate 222, the cover film 22 is in an open state relative to the bottom film 21, at which time the positive electrode 111b can be placed on the bottom film 21. When the cover film 22 is slid away from the cutting carrier plate 222, the cover film 22 is composite with the bottom film 21 in a double-layer state. At this time, the film-closing slide plate 224 also drives the sealing drive 231 to move above the sealing carrier plate 221, so that the sealing drive 231 can drive the sealing block 232 to heat press the composite cover film 22 and bottom film 21.

[0041] Furthermore, such as Figure 5 , Figure 7 , Figure 8 As shown, in one embodiment, a pressing drive 229 is also provided on the film-sealing slide plate 224. The pressing drive 229 is located between the guide shaft 227 and the sealing drive 231. A pressing wheel 2210 is provided on the output shaft of the pressing drive 229. The pressing drive 229 is used to drive the pressing wheel 2210 to descend so as to push the top cover film 22 to be laminated onto the bottom film 21.

[0042] It should be noted that the pressing drive 229 is also a cylinder. When the film-forming slide plate 224 is driven away from the cutting carrier plate 222, that is, when the cover film 22 is laminated onto the bottom film 21, the pressing drive 229 drives the pressing roller 2210 to push the cover film 22, so that the cover film 22 can be stably laminated with the bottom film 21, thereby facilitating the subsequent hot pressing of the cover film 22 and the bottom film 21 by the sealing drive 231 driving the sealing block 232.

[0043] like Figure 5 , Figure 7 , Figure 8 As shown, in one embodiment, the tensioning member 2255 includes a tensioning slider 22551 and a tensioning shaft 22552. The tensioning slider 22551 is slidably disposed on the base plate 210 in the vertical direction, and one end of the tensioning shaft 22552 is rotatably disposed on the tensioning slider 22551.

[0044] It should be noted that, for example, the tensioning shaft 22552 is rotatably mounted to the tensioning slider 22551 via a bearing. Thus, the bottom film 21 passes over the bottom side of the tensioning shaft 22552, and the bottom film 21 drives the tensioning slider 22551 to slide upwards relative to the substrate 210. The gravity of the tensioning slider 22551 and the tensioning shaft 22552 presses down on the bottom film 21, thereby keeping the bottom film 21 taut. Additionally, it should be noted that multiple guide shafts 227 are rotatably mounted on the substrate 210 as needed, so that the guide shafts 227 cooperate with the tensioning shaft 22552, allowing the bottom film 21 to change direction via the guide shafts 227, thereby stably passing sequentially through the sealing carrier plate 221 and the cutting carrier plate 222.

[0045] Furthermore, in one embodiment, the cover film conveying mechanism 226 includes a release wheel and a release drive, wherein the structure of the release wheel is identical to that of the feeding wheel 2251, and the structure of the release drive is identical to that of the feeding drive 2252. Thus, the cover film conveying mechanism 226 can release the rolled cover film 22. Furthermore, to ensure that the cover film 22 maintains a certain degree of tension during release, a tensioning member 2255 is also installed between the release wheel and the guide shaft 227 on the film-closing slide plate 224. This tensioning member 2255 is used to tension the cover film 22.

[0046] like Figure 5 , Figure 7 , Figure 8 As shown, in one embodiment, a baffle 228 is provided on the sealing film carrier plate 221, so that a material passage groove is formed between the baffle 228 and the sealing film carrier plate 221, and the baffle 228 is used to block the cover film 22.

[0047] It should be noted that the feed groove is used to allow the double-layer separator tape to pass through. When the film-fitting slide plate 224 is driven to approach the cutting carrier plate 222, the guide shafts 227 on the film-fitting slide plate 224 drive the cover film 22 to approach the cutting carrier plate 222, ultimately causing the cover film 22 to be blocked by the baffle strip 228, thereby making the cover film 22 open relative to the bottom film 21. In this way, by using the baffle strip 228 to block the cover film 22, it is ensured that the cover film 22 can be stably opened relative to the bottom film 21, so that the positive electrode 111b can be stably placed on the bottom film 21.

[0048] like Figure 5 , Figure 7 , Figure 8 , Figure 11As shown, in one embodiment, the battery positive electrode bag manufacturing equipment 200 further includes a feeding assembly 250. The feeding assembly 250 includes a feeding plate 251, a feeding fixture 252, a feeding drive 253, a picking drive 254, and a picking component 255. The feeding plate 251 is disposed on the substrate 210, and the feeding fixture 252 is detachably disposed on the feeding plate 251. The feeding fixture 252 is used to accommodate the positive electrode sheet 111b. The feeding drive 253 is disposed on the substrate 210. The feeding drive 253 is used to drive the positive electrode 111b in the feeding fixture 252 through the feeding plate 251. The picking drive 254 is set on the film-closing slide plate 224. The picking member 255 is set on the output shaft of the picking drive 254. The picking drive 254 is used to drive the picking member 255 to perform lifting and lowering movements. When the film-closing slide plate 224 is used to slide back and forth, it drives the picking member 255 to slide back and forth between the feeding plate 251 and the sealing carrier plate 221.

[0049] It should be noted that when the cover film 22 is open relative to the bottom film 21, the positive electrode 111b is placed on the bottom film 21. Specifically, the positive electrode 111b can be manually fed or automatically fed. For example, in this embodiment, the loading plate 251 is mounted on the substrate 210, and the loading plate 251 is located on the side of the sealing carrier plate 221 away from the cutting carrier plate 222, and the loading plate 251 and the sealing carrier plate 221 are spaced apart. The loading fixture 252 is detachably mounted on the bottom side of the loading plate 251. The loading fixture 252 is used to carry the stacked positive electrode 111b. In one embodiment, the loading plate 251 has a first feed hole 2511 for the positive electrode 111b to pass through, and the first feed hole 2511 communicates with the loading fixture 252. The feeding drive 253 is mounted on the substrate 210. In one embodiment, the feeding drive 253 includes a feeding drive part and a top rod 2531. The feeding drive part is fixedly mounted on the substrate 210. For example, the feeding drive part is a motor-driven lead screw module. One end of the top rod 2531 is fixedly mounted on the output shaft of the feeding drive part, and the other end of the top rod 2531 is used to pass through from the bottom of the feeding fixture 252, so that the top rod 2531 lifts the positive electrode 111b stacked in the feeding fixture 252, thereby causing each positive electrode 111b to be ejected from the surface of the feeding plate 251 in sequence. Furthermore, the material-picking drive 254 is fixedly mounted on the film-coating slide plate 224. For example, the material-picking drive 254 is a cylinder, and the material-picking component 255 is a material-picking rod 2552 with a suction cup 2551 mounted at its end. The material-picking rod 2552 has a hollow structure and is used to communicate with an external vacuum generator. In this way, the material-picking component 255 can pick up the positive electrode sheet 111b.

[0050] like Figure 5 , Figure 12As shown, in one embodiment, the battery positive electrode bag manufacturing equipment 200 further includes a detection component 260. The detection component 260 includes a detection carrier plate 261, a detection drive 262, a pressure sensor 263, and a suction component 264. The detection carrier plate 261 is disposed on the substrate 210 and is used to support the positive electrode sheet 111b. The detection drive 262 is disposed on the film-sealing slide plate 224 and is located between the material-taking drive 254 and the film-sealing drive 231. The pressure sensor 263 is disposed on the output shaft of the detection drive 262, and the suction component 264 is disposed on the output shaft of the pressure sensor 263. When the detection drive 262 drives the suction component 264 to descend, the suction component 264 abuts against the detection carrier plate 261.

[0051] It should be noted that when the film-coating slide plate 224 is driven by the film-coating drive member 223 to reciprocate relative to the substrate 210, the picking member 255 can transfer the positive electrode sheet 111b from the loading plate 251 to the detection carrier plate 261. Since the positive electrode sheets 111b are stacked within the loading fixture 252, when the picking member 255 picks up the positive electrode sheet 111b, the second positive electrode sheet 111b may adhere to the first positive electrode sheet 111b and be picked up simultaneously; that is, the picking member 255 may pick up two positive electrode sheets 111b at a time. This situation is unacceptable. To avoid two positive electrode sheets 111b being sealed simultaneously in the same positive electrode bag 111, the technical solution in this embodiment is provided. Specifically, the thickness of a single positive electrode sheet 111b differs from the thickness of two positive electrode sheets 111b by more than two times. When the detection drive 262 lowers the suction component 264 to the same height via the pressure sensor 263, if there are two or more positive electrode plates 111b on the detection carrier plate 261, the suction component 264 will be held up by the positive electrode plates 111b, resulting in different final positions. This means that the pressure detection values ​​of the pressure sensor 263 will be inconsistent, thus accurately determining whether the picking component 255 has only picked up a single positive electrode plate 111b. In one embodiment, the detection drive 262 is also a cylinder. Further, in one embodiment, the structure of the suction component 264 is identical to that of the picking component 255.

[0052] like Figure 12 As shown, in one embodiment, a support block 265 is provided on the output shaft of the detection drive 262, and a suction member 264 is slidably disposed on the support block 265 in the vertical direction. A spring 266 is also provided between the suction member 264 and the support block 265. A pressure sensor 263 is disposed on the bottom side of the support block 265 so that the detection end of the pressure sensor 263 abuts against the suction member 264.

[0053] It should be noted that the suction component 264 can slide relative to the support block 265, and is pushed by the spring 266 to be located at the lowest limit position of the support block 265, with the suction component 264 always abutting against the pressure sensor 263. Thus, when the output shaft of the detection drive 262 drives the support block 265 to descend a fixed height, if there is excess material in the positive electrode 111b, it means that the descent height of the suction component 264 decreases. Consequently, the pressure on the detection end of the pressure sensor 263 increases, and the control system can detect that excess material has been picked up.

[0054] like Figure 5 , Figure 13 As shown, in one embodiment, a receiving groove 2611 is provided on the top of the detection carrier plate 261, and a plurality of air outlets 2612 are provided on the inner side wall of the receiving groove 2611. Each air outlet 2612 is used to communicate with an external air source through a solenoid valve.

[0055] It should be noted that when the picking member 255 picks up the positive electrode sheet 111b from the loading plate 251 and transfers it into the receiving trough 2611, the air outlet 2612 blows air outwards while the end of the picking member 255 is in the receiving trough 2611, causing the air to blow laterally towards the positive electrode sheet 111b. Thus, when the picking member 255 picks up two or more positive electrode sheets 111b, the air outlet 2612 can blow air onto these sheets, separating them and preventing them from sticking together. Similarly, when the suction member 264 is driven by the detection drive member 262 to extend into the receiving trough 2611 to pick up the positive electrode sheet 111b, the air outlet 2612 also blows air outwards. Therefore, since the positive electrode sheet 111b in the receiving trough 2611 is held by the suction member 264 at this time, the positive electrode sheet 111b will not be blown away. The positive electrode 111b is separated from the sticking due to the lateral blowing of the gas from the vent 2612. This ensures that the suction member 264 picks up only a single positive electrode 111b.

[0056] like Figure 5 , Figure 7 , Figure 8 As shown, in one embodiment, the battery positive electrode bag manufacturing equipment 200 further includes an adjustment transparent plate 271, an adjustment drive unit 272, and a first camera 273. The adjustment drive unit 272 is disposed on the substrate 210, the adjustment transparent plate 271 is disposed on the adjustment drive unit 272, and the adjustment transparent plate 271 is located between the detection carrier plate 261 and the sealing carrier plate 221. The adjustment transparent plate 271 is used to carry the positive electrode sheet 111b. The first camera 273 is disposed on the substrate 210, and the first camera 273 is located below the adjustment transparent plate 271. The first camera 273 is used to take pictures and detect the adjustment transparent plate 271 and the positive electrode sheet 111b.

[0057] It should be noted that the technical solution of this embodiment is designed to ensure that the positive electrode 111b is accurately placed at the designated position on the bottom film 21 on the sealing substrate 221. Specifically, the adjustment drive unit 272 is mounted on the substrate 210. For example, the adjustment drive unit 272 includes an X-axis module, a Y-axis module, and a rotation module. The X-axis module is disposed on the substrate 210, the Y-axis module is disposed on the output shaft of the X-axis module, and the rotation module is disposed on the Y-axis module. The X-axis module drives the Y-axis module to reciprocate along the X-axis direction. The Y-axis module drives the rotation module to reciprocate along the Y-axis direction. The adjustment transparent plate 271 is mounted on the output shaft of the rotation module, and the rotation module is used to drive the adjustment transparent plate 271 to rotate along the plane formed by the X-axis and Y-axis directions. The X-axis and Y-axis directions are two perpendicular axes on a horizontal plane. Further, in one embodiment, the adjustment transparent plate 271 is made of tempered glass. Furthermore, the first camera 273 is fixedly mounted on the substrate 210, and is located below the adjustment transparent plate 271. Thus, when the suction member 264 picks up the positive electrode sheet 111b from the receiving tray 2611 and places it on the adjustment transparent plate 271, the first camera 273 takes a picture of the positive electrode sheet 111b to determine the difference between the actual coordinates of the positive electrode sheet 111b and the calibration coordinates set by the first camera 273. Then, the adjustment drive unit 272 drives the adjustment transparent plate 271 to slide and rotate along the horizontal plane, ultimately moving the positive electrode sheet 111b to the calibration position of the first camera 273.

[0058] like Figure 5 , Figure 7 , Figure 8 As shown, in one embodiment, the battery positive electrode bag manufacturing equipment 200 further includes a material transfer drive 281 and a material transfer component 282. The material transfer drive 281 is disposed on the film-closing slide plate 224, and the material transfer component 282 is disposed on the output shaft of the material transfer drive 281. The material transfer component 282 is located between the suction component 264 and the sealing block 232. The distances between the feeding plate 251 and the receiving trough 2611, the distances between the receiving trough 2611 and the adjusting transparent plate 271, the distances between the adjusting transparent plate 271 and the sealing carrier plate 221, the distances between the picking component 255 and the suction component 264, the distances between the suction component 264 and the material transfer component 282, and the distances between the material transfer component 282 and the sealing block 232 are all equal.

[0059] Thus, when the film-coating slide 224 is driven to slide close to the cutting carrier plate 222, the guide shafts 227 on the film-coating slide 224 cause the cover film 22 to be in an open state relative to the bottom film 21. At the same time, the material-picking drive 254 drives the material-picking component 255 to transfer the positive electrode sheet 111b from the loading plate 251 to the receiving trough 2611, and the detection drive 262 will drive the suction component 264 to transfer the positive electrode sheet 111b from the receiving trough 2611 to the adjusting transparent plate 271. The material-transfer drive 281 will drive the material-transfer component 282 to transfer the positive electrode sheet 111b from the adjusting transparent plate 271 to the bottom film 21 on the sealing carrier plate 221, which is in an open state. Then, when the film-fitting slide plate 224 is driven to slide away from the cutting carrier plate 222, the guide shafts 227 on the film-fitting slide plate 224 cause the cover film 22 to be in a composite state relative to the bottom film 21. The material-taking component 255 is driven back above the loading plate 251, and at the same time, the material-suction component 264 is driven back above the receiving trough 2611, and the material-transferring component 282 is driven back above the adjusting transparent plate 271. The sealing block 232 returns to the sealing carrier plate 221. At this time, the sealing block 232, driven by the sealing drive component 231, performs hot pressing on the composite cover film 22 and bottom film 21. In one embodiment, the material-transferring drive component 281 is also a cylinder, and the structure of the material-transferring component 282 is the same as that of the material-taking component 255. In this way, automatic feeding of the positive electrode sheet 111b can be realized, and during the feeding process, multi-material detection and position detection of the positive electrode sheet 111b can be realized, improving the continuity of the production of the positive electrode bag 111.

[0060] like Figures 5 to 8 , Figure 14 As shown, in one embodiment, the battery positive electrode bag manufacturing equipment 200 further includes a feeding assembly 290. The feeding assembly 290 includes a light panel 291, a feeding plate 292, a feeding fixture 293, a feeding drive 294, a feeding rod 298, a feeding drive unit 295, a second camera 296, and two feeding components 297. The light panel 291 and the feeding plate 292 are both disposed on the substrate 210, and the distance between the light panel 291 and the feeding plate 292 is equal to the distance between the light panel 291 and the cutting carrier plate 222. The feeding fixture 293 is detachably disposed on the bottom side of the feeding plate 292. The feeding drive 294 is disposed on the substrate 210. One of the feeding rods 298... The end of the feeding rod 298 is located on the output shaft of the feeding drive 294, and the other end of the feeding rod 298 extends from the bottom fabric of the feeding fixture 293 into the feeding fixture 293. The feeding drive 295 is located on the base plate 210. Two feeding parts 297 are spaced apart on the output shaft of the feeding drive 295. The feeding drive 295 is used to drive one of the feeding parts 297 to reciprocate between the cutting carrier plate 222 and the light plate 291, and to drive the other feeding part 297 to reciprocate between the light plate 291 and the feeding plate 292. The second camera 296 is located on the base plate 210, and the second camera 296 is located above the light plate 291 and facing the light plate 291.

[0061] It should be noted that, in one embodiment, the unloading drive unit 295 includes a transverse module 2954, a transverse slide plate 2951, a lifting drive component 2952, and a lifting slide plate 2953. The transverse module is disposed on the base plate 210. The transverse slide plate 2951 is slidably disposed on the base plate 210 laterally, and the transverse slide plate 2951 is connected to the output shaft of the transverse module. The lifting drive component 2952 is disposed on the transverse slide plate 2951. The lifting slide plate 2953 is slidably disposed on the transverse slide plate 2951 in a vertical direction, and the lifting slide plate 2953 is connected to the output shaft of the lifting drive component 2952. For example, the transverse module is a motor-driven lead screw module, and the lifting drive component 2952 is also a cylinder. Two unloading components 297 are disposed spaced apart on the lifting slide plate 2953. In one embodiment, the structure of the unloading component 297 is the same as the structure of the picking component 255, both of which are connected to an external air source through a solenoid valve. Furthermore, the feeding drive unit 294 is also a motor-driven lead screw module. Thus, the feeding drive unit 295 drives one of the feeding components 297 to move the positive electrode bag 111 from the cutting carrier plate 222 to the lamp plate 291. The lamp plate 291 emits light. Since the diaphragm is translucent while the positive electrode sheet 111b is opaque, a second camera 296 above the lamp plate 291 takes a picture to detect whether the positive electrode sheet 111b is missing. Finally, the feeding drive unit 295 drives the other feeding component 297 to move the positive electrode bag 111 from the lamp plate 291 to the feeding plate 292. In one embodiment, the structure of the feeding plate 292 is identical to that of the loading plate 251, except that the through hole in the feeding plate 292 is for the positive electrode bag 111 to pass through, therefore the size of the through hole in the feeding plate 292 is larger than the size of the first feeding hole 2511. Thus, after leakage detection, the positive electrode bags 111 are stacked and stored in the unloading fixture 293. After the unloading fixture 293 is full, it is removed from the unloading plate 292. Then, the positive electrode bags 111 and negative electrode sheets 112 are stacked alternately to form the core package 110.

[0062] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention patent. Unless otherwise specifically defined, the installation / fixing / setting mentioned in this invention can be understood as including, but not limited to, locking and fixing with screws / bolts, welding, or bonding with adhesives, wherein the adhesives used can be commercially available finished products. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A stacked lithium battery, characterized in that, include: A core package includes multiple positive electrode bags and multiple negative electrode plates, wherein each positive electrode bag and each negative electrode plate are stacked alternately to form a core package, wherein the number of negative electrode plates is N, the number of positive electrode bags is N+1, and N is a positive integer, each positive electrode bag includes a diaphragm bag and a positive electrode plate, the diaphragm bag has a diaphragm cavity, and the positive electrode plate is adapted to be accommodated in the diaphragm cavity; An aluminum-plastic film is used to cover the outer wall of the core package, so that the positive tabs of each positive electrode and the negative tabs of each negative electrode protrude from the aluminum-plastic film, and the core package and the aluminum-plastic film are bent into an arc shape as a whole.

2. A method for manufacturing a stacked lithium battery, used to manufacture the stacked lithium battery as described in claim 1, characterized in that, Includes the following steps: Step S10: Obtain multiple positive electrode bags, wherein each positive electrode bag includes a diaphragm bag and a positive electrode sheet embedded in the diaphragm bag; Step S20: Obtain multiple negative electrode sheets, and then hot-press each of the separator bags and each of the negative electrode sheets in a staggered manner to obtain a core package, wherein the number of negative electrode sheets is N, the number of positive electrode bags is N+1, and N is a positive integer; Step S30: Bend the core package so that the core package is bent into an arc shape; Step S40: Obtain aluminum-plastic film, punch pits in the aluminum-plastic film to form recesses inside the aluminum-plastic film, wherein the recesses are bent into an arc shape. Step S50: The core package is placed into the recess, and after side sealing / top sealing, baking, liquid injection, pre-sealing, and second sealing, a stacked lithium battery is obtained.

3. A battery positive electrode bag manufacturing apparatus, used to manufacture the positive electrode bag as described in claim 1, characterized in that, include: substrate; A diaphragm conveying assembly includes a sealing carrier plate, a cutting carrier plate, a film-joining drive, a film-joining slide plate, a bottom film conveying mechanism, and a top film conveying mechanism. The sealing carrier plate and the cutting carrier plate are spaced apart on a substrate. The film-joining slide plate is slidably disposed on the substrate. The film-joining drive is disposed on the substrate, and the output shaft of the film-joining drive is connected to the film-joining slide plate. The bottom film conveying mechanism and the top film conveying mechanism are both disposed on the substrate. The bottom film conveying mechanism drives the bottom film to pass sequentially through the sealing carrier plate and the cutting carrier plate. The top film conveying mechanism drives the top film to pass sequentially through the film-joining slide plate and the sealing carrier plate. When the film-joining drive drives the film-joining slide plate to reciprocate relative to the sealing carrier plate, the film-joining slide plate causes the top film to open or close relative to the bottom film. When the top film is open relative to the bottom film, the positive electrode sheet can be placed on the bottom film. A sealing assembly, comprising a sealing drive and a sealing block, wherein the sealing drive is disposed on the film bonding slide plate and the sealing block is disposed on the output shaft of the sealing drive, and the sealing drive is used to drive the sealing block to abut against the sealing carrier plate, so that the sealing block seals the cover film and the bottom film along the edge of the positive electrode sheet. A cutting assembly, comprising a cutting drive and a cutting block, wherein the cutting drive is disposed on the substrate and the cutting block is disposed on the output shaft of the cutting drive, and the cutting drive is used to drive the cutting block to abut against the cutting carrier plate, so that the cutting block cuts the cover film and the bottom film to obtain a positive electrode bag.

4. The battery positive electrode bag manufacturing equipment according to claim 3, characterized in that, The bottom film conveying mechanism includes a feeding roller, a feeding drive, a receiving roller, and a receiving drive. The feeding drive is disposed on the substrate, and the feeding roller is disposed on the output shaft of the feeding drive. The feeding drive is used to drive the feeding roller to rotate. The receiving drive is disposed on the substrate, and the receiving roller is disposed on the output shaft of the receiving drive. The receiving drive is used to drive the receiving roller to rotate. The feeding roller is used to release the bottom film, which passes sequentially through the sealing carrier plate and the cutting carrier plate, and then winds it onto the receiving roller.

5. The battery positive electrode bag manufacturing equipment according to claim 4, characterized in that, The bottom film conveying mechanism further includes a tensioning member disposed on the substrate, which is used to tension the bottom film.

6. The battery positive electrode bag manufacturing equipment according to claim 3, characterized in that, The film-closing slide plate is rotatably equipped with several guide shafts, which are used to guide the cover film.

7. The battery positive electrode bag manufacturing equipment according to claim 3, characterized in that, The sealing film carrier plate is provided with a baffle strip, so that a material passage groove is formed between the baffle strip and the sealing film carrier plate, and the baffle strip is used to block the sealing film.

8. The battery positive electrode bag manufacturing equipment according to claim 3, characterized in that, The battery positive electrode bag manufacturing equipment further includes a feeding assembly, which includes a feeding plate, a feeding fixture, a feeding drive, a picking drive, and a picking component. The feeding plate is disposed on the substrate, and the feeding fixture is detachably disposed on the feeding plate. The feeding fixture is used to accommodate the positive electrode sheet. The feeding drive is disposed on the substrate and is used to drive the positive electrode sheet in the feeding fixture through the feeding plate. The picking drive is disposed on the film-sealing slide plate, and the picking component is disposed on the output shaft of the picking drive. The picking drive is used to drive the picking component to perform lifting and lowering movements. When the film-sealing slide plate reciprocates, it drives the picking component to reciprocate between the feeding plate and the sealing carrier plate.

9. The battery positive electrode bag manufacturing equipment according to claim 8, characterized in that, The battery positive electrode bag manufacturing equipment further includes a detection component, which includes a detection carrier plate, a detection drive, a pressure sensor, and a suction component. The detection carrier plate is disposed on the substrate and is used to support the positive electrode sheet. The detection drive is disposed on the film-sealing slide plate and is located between the material-taking drive and the film-sealing drive. The pressure sensor is disposed on the output shaft of the detection drive and the suction component is disposed on the output shaft of the pressure sensor. When the detection drive drives the suction component to descend, the suction component abuts against the detection carrier plate.

10. The battery positive electrode bag manufacturing equipment according to claim 9, characterized in that, The battery positive electrode bag manufacturing equipment further includes an adjustment transparent plate, an adjustment drive unit, and a first camera. The adjustment drive unit is disposed on the substrate, the adjustment transparent plate is disposed on the adjustment drive unit, and the adjustment transparent plate is located between the detection carrier plate and the sealing carrier plate. The adjustment transparent plate is used to carry the positive electrode sheet. The first camera is disposed on the substrate and is located below the adjustment transparent plate. The first camera is used to take pictures and detect the adjustment transparent plate and the positive electrode sheet.

Images