Tab shaping apparatus, battery manufacturing device, battery cell, and tab shaping method

Abstract

A tab shaping apparatus (400), a battery manufacturing device, a battery cell, and a tab shaping method. The tab shaping apparatus (400) is used for shaping a tab of an electrode assembly (22). The tab is welded to an adapter (24), and adhesive tapes (23) are respectively attached on two sides of a welded portion. The tab shaping apparatus (400) comprises a jig module (410) and a hot melting module (420). The jig module (410) is used for positioning the electrode assembly (22), the jig module (410) has a positioning surface for bearing the electrode assembly (22), the jig module (410) comprises positioning assemblies (411), and the positioning assemblies (411) are used for mating with at least one side of the electrode assembly (22) to fix the electrode assembly (22) to the positioning surface. The hot melting module (420) comprises hot melting heads (421) and a driving member (422), the driving member (422) is used for driving the hot melting heads (421) to move close to or away from the jig module (410), so that the hot melting heads (421) mate with the jig module (410) to hot-melt and connect the adhesive tapes (23) attached on the two sides of the welded portion to each other.

Description

Tab shaping device, battery manufacturing equipment, battery monomer and tab shaping method

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application 202410629255.8, filed May 21, 2024, entitled “Tab Shaping Device, Battery Manufacturing Equipment, Battery Monomer and Tab Shaping Method,” the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a tab shaping device, a battery manufacturing equipment, a battery monomer and a tab shaping method. BACKGROUND

[0004] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0005] In the manufacturing process of batteries, how to improve the reliability of battery monomers is a problem that needs to be solved in battery technology.

[0006] SUMMARY

[0007] The present application provides a tab shaping device, a battery manufacturing equipment, a battery monomer and a tab shaping method, which can improve the reliability of the battery monomer.

[0008] The present application is achieved by the following technical solutions:

[0009] In a first aspect, the present application provides a tab shaping device for shaping the tabs of an electrode assembly, the tabs being welded to an adapter and having adhesive paper attached to both sides of the welding site. The tab shaping device comprises a jig module and a hot melting module. The jig module is used to position the electrode assembly and has a positioning surface for carrying the electrode assembly. The jig module comprises a positioning assembly for cooperating with at least one side of the electrode assembly to fix the electrode assembly to the positioning surface. The hot melting module comprises a hot melting head and a driving member for driving the hot melting head to approach or move away from the jig module, so that the hot melting head cooperates with the jig module to hot melt connect the adhesive papers attached to both sides of the welding site.

[0010] In the technical scheme of the embodiment of the present application, the jig module bears the electrode assembly to be hot-melted, the positioning assembly cooperates with at least one side of the electrode assembly, so as to fix the electrode assembly to the positioning surface, keep the relative position of the electrode assembly during hot-melting of the hot-melting module, and improve the hot-melting precision of the hot-melting module on the adhesive paper at the welding position of the tab and the adapter. Then, the hot-melting module cooperates with the jig module, under the action of the driving member, the hot-melting head approaches the jig module, the adhesive papers on the two sides of the welding position of the tab and the adapter of the electrode assembly are hot-melted with each other, the adhesive paper provides a restraining force for the tab, and the tab morphology of the electrode assembly can be effectively fixed, that is, the tab morphology is fixed, the risk of tab bifurcation or tab deformation caused by tab redundancy is reduced, and the reliability of the battery monomer is improved.

[0011] According to some embodiments of the present application, the positioning assembly is used to abut against at least two opposite sides of the electrode assembly to position the electrode assembly.

[0012] In the above scheme, the positioning assembly can abut against at least two opposite sides of the electrode assembly to achieve clamping and positioning of the electrode assembly, and the positioning assembly contacts the side surface of the electrode assembly, which is not easy to interfere with the hot-melting module, and is beneficial to hot-melting of the electrode assembly by the hot-melting module.

[0013] According to some embodiments of the present application, the positioning assembly includes a plurality of abutting members, and the plurality of abutting members cooperates to abut against the remaining three side surfaces of the electrode assembly except the side surface with the tab.

[0014] In the above scheme, the plurality of abutting members abut against the remaining three side surfaces of the electrode assembly except the side surface with the tab, so that the side surfaces of the electrode assembly except the side surface with the adapter are abutted and limited by the abutting members, the positioning effect of the electrode assembly is better, and the electrode assembly is not easy to move.

[0015] According to some embodiments of the present application, the jig module further includes a positioning table, and at least one of the plurality of abutting members is movably arranged on the positioning table to adjust the area size of the region enclosed by the plurality of abutting members.

[0016] In the above scheme, the abutting members are movably arranged on the positioning table, so that the area size of the region enclosed by the plurality of abutting members can be adjusted, which can adapt to the positioning needs of electrode assemblies of different models and has a wider application range.

[0017] According to some embodiments of the present application, the electrode assembly includes a first electrode assembly and a second electrode assembly; the number of positioning assemblies is two, and the two positioning assemblies are distributed between the positioning tables and are respectively used to position the first electrode assembly and the second electrode assembly.

[0018] In the above scheme, the two positioning assemblies can position the first electrode assembly and the second electrode assembly respectively, so that the hot melting module can melt the hot melt on the side of the electrode lug of the first electrode assembly and the second electrode assembly facing each other and the two sides of the adhesive tape of the adapter.

[0019] According to some embodiments of the present application, the tab shaping device further comprises a carrying table and a position adjusting module, the position adjusting module is arranged between the carrying table and the jig module, and the position adjusting module is used to movably arrange the jig module on the carrying table to adjust the relative position of the electrode assembly on the jig module and the hot melting module.

[0020] In the above scheme, by arranging the position adjusting module between the carrying table and the jig module, the position adjusting module can drive the jig module to move on the carrying table to realize the position adjustment of the jig module, thereby meeting the hot melting position adjustment requirement of the electrode assembly.

[0021] According to some embodiments of the present application, the position adjusting module comprises a first guide part and a first moving seat, which are arranged in the first direction on the carrying table; the first moving seat is slidingly arranged in the first direction on the first guide part, and the jig module is arranged on the first moving seat, and the first direction is perpendicular to the positioning surface.

[0022] In the above scheme, by slidingly cooperating the first guide part and the first moving seat, the jig module is arranged on the first moving seat, so that the jig module can move on the carrying table along the first direction to realize the position adjustment of the jig module in the first direction.

[0023] According to some embodiments of the present application, the position adjusting module comprises a first guide part, a first moving seat and a second guide part, the first guide part is arranged in the first direction on the carrying table, and the first moving seat is slidingly arranged in the first direction on the first guide part; the second guide part is arranged in the second direction on the first moving seat, and the jig module is slidingly arranged in the second direction on the second guide part, the first direction and the second direction are both perpendicular to the positioning surface, and the first direction and the second direction are perpendicular.

[0024] In the above scheme, by slidingly cooperating the first guide part and the first moving seat, the second guide part is arranged on the first moving seat, and the jig module is slidingly arranged on the second guide part, so that the jig module can move on the carrying table in the first direction and the second direction, the position adjustment of the jig module can be realized in the first direction and the second direction, the position adjustment of the jig module is more flexible, the position adjustment requirement of the hot melting module is reduced, and the structure of the hot melting module is simplified.

[0025] According to some embodiments of the present application, the tab shaping device further comprises a limiting module, the limiting module is arranged on the carrying table, and the limiting module is used to limit the position of the jig module.

[0026] In the above scheme, by setting the limiting module on the bearing table, the limiting module can limit the jig module after position adjustment, which is beneficial to the hot melting module to perform hot melting operation on the adhesive paper area of the electrode assembly on the jig module.

[0027] According to some embodiments of the present application, the limiting module comprises a plurality of limiting parts, and the plurality of limiting parts are distributed on the outer circumferential side of the jig module; each limiting part comprises a body and a limiting piece, the body is arranged on the bearing table, and the limiting piece is telescopically arranged on the body along the first direction or the second direction, and the opposite ends of the plurality of limiting pieces abut the outer circumferential side of the jig module, respectively.

[0028] In the above scheme, by the cooperation of the plurality of limiting parts, each side of the outer circumferential side of the jig module has a limiting part to limit the jig module, and the limiting effect on the jig module is good. The limiting piece is telescopically arranged on the body, and the telescopic function of the limiting piece can realize the yielding of the jig module during position adjustment and the limiting function of the jig module after position adjustment.

[0029] According to some embodiments of the present application, the limiting piece and the body are threadedly connected.

[0030] In the above scheme, by threadedly connecting the limiting piece and the body, the extending length of the limiting piece extending out of the body can be realized by rotating the limiting piece, so as to realize the limiting and yielding functions of the jig module.

[0031] According to some embodiments of the present application, the driving piece is used to drive the hot melting head to move along the third direction to approach or move away from the jig module, and the third direction is perpendicular to the positioning surface.

[0032] In the above scheme, by driving the hot melting head to approach the electrode assembly on the jig module along the third direction perpendicular to the positioning surface to perform hot melting, the hot melting operation of the hot melting module is realized. After the hot melting is completed, the hot melting head is driven away from the electrode assembly by the driving piece, which is convenient for adjusting the hot melting point position of the electrode assembly.

[0033] According to some embodiments of the present application, the hot melting module further comprises a lifting frame and a connecting piece, and the lifting frame is connected with the driving piece; the hot melting head is installed on the lifting frame through the connecting piece, and the connecting piece is movably arranged on the lifting frame along the first direction and / or the second direction, so as to adjust the relative position of the hot melting head and the lifting frame, and the third direction, the first direction and the second direction are perpendicular to each other.

[0034] In the above scheme, the hot melting head is installed on the lifting frame through the connecting piece, and the connecting piece is movably installed on the lifting frame, so that the position of the hot melting head can be finely adjusted on the lifting frame, the flexible movement between the two hot melting areas of the electrode assembly can be realized, the position of the jig module does not need to be adjusted, and the hot melting efficiency of the hot melting head is correspondingly improved.

[0035] According to some embodiments of the present application, the lifting frame has a sliding groove extending along the first direction and / or the second direction, the connecting member comprises a body part and a locking part, the body part is slidably arranged in the sliding groove, one end of the body part is connected with the hot melting head, and the other end of the body part is threadedly connected with the locking part.

[0036] In the above scheme, by sliding the body part in the sliding groove and threadedly connecting the locking part with the upper end of the body part, only the rotation of the locking part is needed to realize the locking or unlocking of the body part on the sliding groove, which is convenient to operate.

[0037] According to some embodiments of the present application, the hot melting module further comprises a stand, the driving member is installed on the stand, and the lifting frame has a guide rod extending along a third direction, the guide rod is in penetrating fit with the stand to guide the movement of the lifting frame along the third direction relative to the stand.

[0038] In the above scheme, by arranging the guide rod on the lifting frame and guiding the guide rod with the stand, the stability of the lifting frame during the lifting process is improved under the guiding fit of the guide rod and the stand, and the hot melting precision of the hot melting module is correspondingly improved.

[0039] According to some embodiments of the present application, the hot melting module further comprises a stand, the driving member is movably arranged on the stand along a second direction, and the second direction is perpendicular to the third direction.

[0040] In the above scheme, by enabling the driving member to move on the stand, the relative position adjustment of the hot melting module and the electrode assembly on the jig module in the second direction can be realized by correspondingly adjusting the position of the hot melting module in the second direction without the second direction position adjustment function of the jig module or without adjusting the position of the jig module in the second direction, which is more flexible in selection and has a wider application range.

[0041] According to some embodiments of the present application, the hot melting head is provided with a Teflon coating layer close to one end of the jig module.

[0042] In the above scheme, by arranging the Teflon coating layer on the surface of the hot melting head, the Teflon coating layer can reduce the adhesion between the hot melting adhesive tape and the hot melting head, and reduce the risk of adhesive tape wire drawing.

[0043] According to some embodiments of the present application, the tab shaping device further comprises a control module and a control screen, the control screen is used for inputting hot melting parameters of the hot melting module, and the control screen, the hot melting module and the control module are electrically connected.

[0044] In the above scheme, by controlling the setting of the control screen, the operator can act on the control screen to realize the setting of the hot melting parameters of the hot melting module, and the control module automatically controls the hot melting module according to the hot melting parameters of the control screen, so that the degree of automation is high and the manual operation is simplified.

[0045] According to some embodiments of the present application, the tab shaping device further comprises a thermal sensor, the thermal sensor is arranged on the hot melting head of the hot melting module, and the thermal sensor is used to acquire the real-time temperature of the hot melting head.

[0046] In the above scheme, during the hot melting process of the hot melting head on the adhesive paper of the electrode assembly, the thermal sensor can acquire the real-time temperature of the hot melting head, and the control module can accurately adjust the temperature of the hot melting head according to the temperature fed back by the thermal sensor, so that the hot melting effect on the electrode assembly is better.

[0047] According to some embodiments of the present application, the tab shaping device further comprises an operation button, the operation button is electrically connected with the control module, and the operation button is used to start or stop the hot melting module.

[0048] In the above scheme, the operator only needs to act on the operation button to realize the start and stop of the hot melting module, so that the operation is simple.

[0049] In the second aspect, the embodiments of the present application also provide a battery manufacturing equipment, which comprises the tab shaping device in the above embodiments.

[0050] In the third aspect, the embodiments of the present application also provide a tab shaping method, which comprises: welding the tab of an electrode assembly with an adapter, respectively pasting adhesive paper on both sides of the welding position, and hot melting the adhesive papers pasted on both sides of the welding position.

[0051] In the above scheme, after the tab of the electrode assembly is welded with the adapter, the adhesive paper is pasted on both sides of the welding position, the adhesive paper can provide a binding force to the tab, and the adhesive papers on both sides of the welding position are hot melted to each other, so that the tab appearance of the electrode assembly can be effectively fixed, that is, the tab appearance is fixed, the risk of tab bifurcation or tab deformation is reduced, the battery monomer is not easy to cause the failure risk of tab redundancy after core combination, and the reliability of the battery monomer is improved.

[0052] According to some embodiments of the present application, the hot melting of the adhesive papers pasted on both sides of the welding position comprises: hot melting the parts of the adhesive papers beyond the edges of the adapter to each other, so that the adhesive paper fixes the tab on the adapter.

[0053] In the above scheme, the parts of the adhesive papers beyond the edges of the adapter are hot melted to each other, the tab is fixed on the adapter by the adhesive paper, the adhesive paper provides a binding force to the tab, the tab appearance is fixed, and the risk of the tab deforming to contact the main body area of the electrode assembly is reduced.

[0054] In a fourth aspect, the embodiments of the present application further provide a battery cell, comprising an electrode assembly, an adapter and adhesive paper, the electrode assembly has a tab, the tab is welded with the adapter, the adhesive paper is attached to both sides of the welding position of the tab and the adapter, and the adhesive paper on both sides of the welding position is hot melt connected.

[0055] In the above solution, the adhesive paper attached to both sides of the welding position of the tab and the adapter of the electrode assembly is hot melt connected, the adhesive paper provides a binding force to the tab, and the appearance of the tab is fixed, thereby reducing the risk of deformation of the tab and contact with the main body area of the electrode assembly, and improving the reliability of the battery cell.

[0056] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0057] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0058] FIG. 1 is a structural schematic diagram of a tab shaping device according to some embodiments of the present application;

[0059] FIG. 2 is a structural schematic diagram of the tab shaping device according to some embodiments of the present application from another angle;

[0060] FIG. 3 is a front view of the tab shaping device according to some embodiments of the present application;

[0061] FIG. 4 is a distribution schematic diagram of a hot melt area when a first electrode assembly and a second electrode assembly in an electrode assembly according to some embodiments of the present application are hot melt connected;

[0062] FIG. 5 is a structural schematic diagram of a first moving seat of a position adjusting module in the tab shaping device according to some embodiments of the present application;

[0063] FIG. 6 is a structural schematic diagram of a hot melt module in the tab shaping device according to some embodiments of the present application;

[0064] FIG. 7 is a front view of the hot melt module in the tab shaping device according to some embodiments of the present application;

[0065] FIG. 8 is a structural schematic diagram of a tab shaping device according to some other embodiments of the present application;

[0066] FIG. 9 is a side view of the tab shaping device in FIG. 8.

[0067] In the drawings, the figures are not necessarily drawn to scale.

[0068] Label description: 22-electrode assembly; 221-first electrode assembly; 222-second electrode assembly; 23-adhesive tape; 24-adapter; 250-hot melting area; 400-tab shaping device; 410-jig module; 411-positioning assembly; 4111-abutment; 412-positioning table; 413-handle; 420-hot melting module; 421-hot melting head; 4210-pressing block; 4211-teflon coating; 422-driving member; 423-lifting frame; 4231-slotted; 4232-cylinder joint; 424-connector; 4241-body part; 4242-locking member; 425-stand; 4251-vertical rod; 4252-cross rod; 426-guide rod; 427-first guide rail; 428-mounting seat; 429-second guide rail; 430-bearing table; 440-position adjusting module; 441-first guide part; 442-first moving seat; 443-second guide part; 450-limiting module; 451-limiting part; 4511-body; 4512-limiting member; 460-control screen; 461-screen area; 462-key area; 470-operation button. DETAILED DESCRIPTION

[0069] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification of the present application and claims and the above description of drawings are intended to cover not exclusive inclusion. The terms "first", "second" and the like in the specification of the present application and claims or the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0071] Reference within this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in

[0072] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0073] The term "and / or" in this application is only a description of the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0074] "Multiple" appearing in this application means more than two (including two), and similarly, "multiple groups" means more than two groups (including two groups), and "multiple pieces" means more than two pieces (including two pieces).

[0075] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time, the active ions can pass through.

[0076] In some embodiments, the positive electrode can be a positive electrode tab, which can include a positive electrode current collector and a positive electrode active material arranged on at least one surface of the positive electrode current collector.

[0077] As an example, the positive electrode current collector has two opposite surfaces in the thickness direction of itself, and the positive electrode active material is arranged on any one or both of the two opposite surfaces of the positive electrode current collector.

[0078] As an example, the positive electrode current collector can employ a metal foil or a composite current collector. For example, as a metal foil, aluminum subjected to silver plating on the surface, stainless steel subjected to silver plating on the surface, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, or the like can be employed. The composite current collector can include a high molecular material base material and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, or the like) on a high molecular material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0079] As an example, the positive electrode active material can include at least one of lithium-containing phosphates, lithium transition metal oxides, and modified compounds of each thereof. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material can also be used.

[0080] In some embodiments, the negative electrode can be a negative electrode tab, which can include a negative electrode current collector.

[0081] As an example, the negative electrode current collector can employ a metal foil or a composite current collector. For example, as a metal foil, aluminum subjected to silver plating on the surface, stainless steel subjected to silver plating on the surface, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, or the like can be employed.

[0082] In some embodiments, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is disposed on either one or both of the two surfaces of the negative electrode current collector.

[0083] As an example, the negative electrode active material can employ a negative electrode active material for a battery known in the art. As an example, the negative electrode active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, lithium titanate, and the like. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery negative electrode active material can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0084] In some embodiments, the separator is a separator film. The present application does not have a particular limitation on the type of separator film, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0085] As an example, the main material of the diaphragm can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The diaphragm can be a single layer film or a multi-layer composite film, and is not particularly limited. When the diaphragm is a multi-layer composite film, the materials of the layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive and negative electrodes, or can be attached to the surface of the positive and negative electrodes.

[0086] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and separate the positive electrode and the negative electrode.

[0087] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0088] From the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of hydroelectric, thermal, wind and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, electric vehicles, military equipment and aerospace, and many other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0089] The development of battery technology needs to consider many design factors, such as energy density, charge and discharge rate and other performance parameters, in addition, the reliability of the battery also needs to be considered.

[0090] The electrode assembly includes a main body region and a tab, and the tab extends from the main body region to connect with the adapter to realize the export and import of the electrical energy of the electrode assembly.

[0091] At present, the tab of the electrode assembly and the adapter are connected by ultrasonic welding, and the upper and lower adhesive papers are pasted on the welding position by a pasting machine after welding. Affected by the adhesion of the adhesive paper and the stress on the tab during the core combination of the electrode assembly, the adhesion effect of the upper and lower adhesive papers is poor, so that the appearance of the tab of the electrode assembly after the core combination is abnormal, and the redundancy risk is easy to occur. After the redundancy risk, the tab is inserted into the main body region of the electrode assembly, which causes the positive and negative electrodes to be short-circuited, and affects the reliability of the battery monomer.

[0092] Based on the above consideration, in order to reduce the redundancy risk of the tab and improve the reliability of the battery monomer, the present application designs a tab shaping device. The tab shaping device includes a jig module and a hot melting module. The jig module is used for positioning the electrode assembly, and the hot melting module cooperates with the jig module. The hot melting module is used for hot melting connection of the adhesive papers pasted on both sides of the welding position.

[0093] In this way, the hot melting module can melt the adhesive paper on both sides of the welding position between the tab of the electrode assembly and the adapter, so that the melted adhesive paper fixes the appearance of the tab of the electrode assembly and restricts the tab, the tab is not easy to be inserted into the main body area of the electrode assembly, thereby reducing the risk of positive and negative contact short circuit and improving the reliability of the battery cell.

[0094] The electrode tab shaping device 400 is used for shaping the tab of the electrode assembly 22, the tab is welded with the adapter 24, and adhesive paper 23 is attached on both sides of the welding position, the electrode tab shaping device 400 comprises a jig module 410 and a hot melting module 420, the jig module 410 is used for positioning the electrode assembly 22, the jig module 410 has a positioning surface for carrying the electrode assembly 22, the jig module 410 comprises a positioning assembly 411, the positioning assembly 411 is used for cooperating with at least one side of the electrode assembly 22 to fix the electrode assembly 22 on the positioning surface; the hot melting module 420 comprises a hot melting head 421 and a driving member 422, the driving member 422 is used for driving the hot melting head 421 to approach or move away from the jig module 410, so that the hot melting head 421 cooperates with the jig module 410 to melt and connect the adhesive paper 23 attached on both sides of the welding position.

[0095] The jig module 410 is a positioning tool, and the function of the jig module 410 is to bear and position the electrode assembly 22, and when the hot melting module 420 melts the adhesive paper 23 on both sides of the welding position between the tab of the electrode assembly 22 and the adapter 24, the relative position of the electrode assembly 22 can be maintained.

[0096] The function of the positioning assembly 411 is to position the electrode assembly 22 on the jig module 410, so that the position of the electrode assembly 22 does not change during hot melting, and the accuracy of hot melting is ensured.

[0097] The positioning assembly 411 cooperates with at least one side of the electrode assembly 22, which means that the positioning assembly 411 can cooperate with one side or multiple sides of the electrode assembly 22, depending on the specific structure of the positioning assembly 411. For example, the positioning assembly 411 can be a clamping air cylinder, a pressing air cylinder, a vacuum suction accessory or a positioning component such as a stopper.

[0098] When the positioning assembly 411 is a vacuum suction accessory, the positioning assembly 411 is in suction fit with the bottom surface of the electrode assembly 22, and the vacuum suction accessory generates negative pressure on the bottom of the electrode assembly 22 to suction and fix the electrode assembly 22 on the jig module 410, and can also provide positioning function for the electrode assembly 22, that is, the positioning assembly 411 is in fit with one side of the bottom surface of the electrode assembly 22.

[0099] When the positioning assembly 411 is a downward pressing air cylinder, the downward pressing air cylinder is in contact with the top surface of the electrode assembly 22 to provide downward pressing force for the electrode assembly 22, so as to position the electrode assembly 22 on the jig module 410.

[0100] When the positioning assembly 411 is a clamping air cylinder, the clamping air cylinder can be clamped on both sides of the electrode assembly 22 to realize positioning of the electrode assembly 22. That is, when the positioning assembly 411 is a clamping air cylinder or a resisting piece, the positioning assembly 411 can be in fit with multiple sides of the electrode assembly 22 to realize positioning and fixing of the electrode assembly 22.

[0101] The hot melting module 420 has a hot melting function, and the hot melting module 420 functions to hot melt the adhesive tape 23 on both sides of the welding position of the tab of the electrode assembly 22 and the adapter 24 on the jig module 410, so as to fix the tab appearance of the electrode assembly 22 and play a restraining function, so that the tab is not easy to be inserted into the main body area of the electrode assembly 22, thereby reducing the risk of positive and negative electrode contact short circuit and improving the reliability of the battery monomer. The tab shaping device 400 can be applied to a laboratory for testing and verifying the hot melting effect under different hot melting parameters, and can be applied after the adhesive machine and before the cell is combined.

[0102] The hot melting head 421 can be a component capable of melting materials at high temperature. The hot melting head 421 can be provided below with a pressing block 4210 having a clearance hole for the hot melting head 421 to pass through, and the pressing block 4210 can fix the tab when the hot melting head 421 hot melts the adhesive tape 23, thereby improving the precision of hot melting. The hot melting module 420 can include at least one hot melting head 421, and the number of hot melting heads 421 can be determined according to actual conditions. In the embodiment, the number of hot melting heads 421 is two.

[0103] The driving member 422 refers to a driving component capable of driving the hot melting head 421 to move, and the driving member 422 can be various driving mechanisms, for example, the driving member 422 can be an air cylinder, a hydraulic cylinder, an electric push rod, a screw nut pair or a linear module, etc. Alternatively, the driving member 422 is an air cylinder.

[0104] The cooperation between the hot melting module 420 and the jig module 410 realizes the mutual hot melting connection of the adhesive papers 23 arranged on both sides of the welding position of the electrode assembly 22. There can be multiple cases. In the first case, the hot melting module 420 is static, the jig module 410 is movable, the electrode assembly 22 is moved to the hot melting module 420 by the jig module 410 for hot melting by the hot melting module 420. In the second case, the hot melting module 420 is movable, the jig module 410 is static, the electrode assembly 22 on the jig module 410 is static, and the hot melting module 420 moves to the target position for hot melting operation with the electrode assembly 22 on the jig module 410. In the third case, the hot melting module 420 is movable, and the jig module 410 can also be movable. The hot melting module 420 and the jig module 410 are cooperatively movable to realize the hot melting operation of the hot melting module 420 and the electrode assembly 22 on the jig module 410.

[0105] In the technical scheme of the embodiment of the present application, the electrode assembly 22 to be hot melted is carried by the jig module 410, and the positioning assembly 411 cooperates with at least one side of the electrode assembly 22 to fix the electrode assembly 22 to the positioning surface, so that the relative position of the electrode assembly 22 is maintained during hot melting by the hot melting module 420, and the hot melting precision of the hot melting module 420 on the adhesive paper 23 of the welding position of the tab and the adapter 24 is improved. Then, the hot melting module 420 cooperates with the jig module 410, and under the action of the driving member 422, the hot melting head 421 approaches the jig module 410 to hot melt the adhesive papers 23 arranged on both sides of the welding position of the tab and the adapter 24 on the electrode assembly 22. The adhesive paper 23 provides a restraining force for the tab, which can effectively fix the tab appearance of the electrode assembly 22, that is, the tab appearance is fixed, the risk of tab bifurcation or tab deformation caused by tab redundancy is reduced, and the reliability of the battery monomer is improved.

[0106] According to some embodiments of the present application, the positioning assembly 411 is used to abut against at least two opposite sides of the electrode assembly 22 to position the electrode assembly 22.

[0107] The positioning assembly 411 can abut against at least two opposite sides of the electrode assembly 22 to realize clamping and positioning of the electrode assembly 22, and the positioning assembly 411 is in contact with the side surface of the electrode assembly 22, which is not easy to interfere with the hot melting module 420, and is beneficial to hot melting of the electrode assembly 22 by the hot melting module 420.

[0108] According to some embodiments of the present application, please refer to FIG. 1 and FIG. 2, FIG. 1 is a structural schematic diagram of a tab shaping device according to some embodiments of the present application; and FIG. 2 is a structural schematic diagram of the tab shaping device according to some embodiments of the present application from another angle. The positioning assembly 411 includes multiple abutting members 4111, and the multiple abutting members 4111 cooperatively abut against the remaining three side surfaces of the electrode assembly 22 except the side surface with the tab.

[0109] The abutting member 4111 provides the abutting function for the electrode assembly 22. The abutting member 4111 can have various structures. For example, when the abutting member 4111 is a telescopic mechanism, such as a pneumatic cylinder or an electric push rod, the telescopic function of the abutting member 4111 can be used to abut or release the side surface of the electrode assembly 22. Of course, the abutting member 4111 can also be a conventional stopper that does not have a telescopic function. However, the stopper can be arranged on the jig module 410 by moving, and the abutting function for the electrode assembly 22 can also be achieved.

[0110] The plurality of abutting members 4111 are arranged on the jig module 410 and located at the circumferential side of the electrode assembly 22. The plurality of abutting members 4111 cooperatively provide the positioning function for the electrode assembly 22. The electrode assembly 22 has three side surfaces except the side surface of the adapter 24. The number of the abutting members 4111 on each side of the electrode assembly 22 can be one or more. The number of the abutting members 4111 can be determined according to the actual situation. In this embodiment, the number of the abutting members 4111 on the side of the electrode assembly 22 opposite to the adapter 24 is two, and the number of the abutting members 4111 on the other two sides of the electrode assembly 22 is one.

[0111] The plurality of abutting members 4111 abut the three side surfaces of the electrode assembly 22 except the side surface of the tab. In this way, the abutting members 4111 abut and limit the three side surfaces of the electrode assembly 22 except the side surface of the adapter 24. The positioning effect for the electrode assembly 22 is better, and the electrode assembly 22 is less likely to move.

[0112] According to some embodiments of the present application, the jig module 410 further comprises a positioning table 412. At least one of the plurality of abutting members 4111 is movably arranged on the positioning table 412, so as to adjust the area size of the region enclosed by the plurality of abutting members 4111.

[0113] The abutting member 4111 can be moved on the positioning table 412 in various ways. For example, the positioning table 412 can be provided with a plurality of connecting holes corresponding to the positions of the abutting members 4111. The abutting member 4111 is a stopper with an L-shaped cross section. The side of the abutting member 4111 close to the positioning table 412 is provided with a through hole. The abutting member 4111 can be moved along the distribution direction of the plurality of connecting holes to adjust the position of the abutting member 4111. After the position of the abutting member 4111 is determined, the through hole is penetrated by a fastener, and then one of the connecting holes is penetrated, so as to fix the position of the abutting member 4111.

[0114] Of course, the positioning table 412 can also be provided with a connecting hole, and the abutting member 4111 is correspondingly provided with an elongated through hole near one side of the positioning table 412. The through hole is locked with the connecting hole by a fastener. When the position of the abutting member 4111 needs to be adjusted, the abutting member 4111 is only needed to be moved along the extension direction of the elongated hole. After the abutting member 4111 is moved to the position, the fastener is used to lock the through hole and the connecting hole. The fastener can be a bolt.

[0115] By movably arranging the abutting member 4111 on the positioning table 412, the area surrounded by the plurality of abutting members 4111 can be adjusted in size. In this way, the positioning requirement of the electrode assembly 22 of different models can be adapted, and the application range is wider.

[0116] According to some embodiments of the present application, please refer to FIG. 1 and FIG. 4. FIG. 1 is a structural schematic diagram of the tab shaping device according to some embodiments of the present application. FIG. 4 is a distribution schematic diagram of the hot melt area when the first electrode assembly and the second electrode assembly in the electrode assembly 22 are hot melted. The electrode assembly 22 includes a first electrode assembly 221 and a second electrode assembly 222. The number of the positioning assembly 411 is two. The two positioning assemblies 411 are distributed at intervals on the positioning table 412 and are respectively used for positioning the first electrode assembly 221 and the second electrode assembly 222.

[0117] The electrode assembly 22 includes a positive electrode, a negative electrode, and a separator. In the process of charging and discharging of the battery monomer, active ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting and can also allow the active ions to pass through. The part of the positive electrode tab and the negative electrode tab having active material constitutes the main body part of the electrode assembly 22. The part of the positive electrode tab and the negative electrode tab not having active material respectively constitutes the tab. The positive electrode tab and the negative electrode tab can be located at one end of the main body part or at two ends of the main body part respectively.

[0118] The two positioning assemblies 411 can respectively position the first electrode assembly 221 and the second electrode assembly 222. In this way, the hot melt module 420 can facilitate the hot melting of the adhesive tape 23 on both sides of the welding position of the tabs on the first electrode assembly 221 and the second electrode assembly 222 and the adapter 24, and the hot melting effect is good.

[0119] According to some embodiments of the present application, please continue to refer to FIG. 3. The tab shaping device 400 further includes a bearing table 430 and a position adjusting module 440. The position adjusting module 440 is arranged between the bearing table 430 and the jig module 410. The position adjusting module 440 is used for movably arranging the jig module 410 on the bearing table 430, so as to adjust the relative position of the electrode assembly 22 on the jig module 410 and the hot melt module 420.

[0120] The main function of the bearing table 430 is a bearing function, and the bearing table 430 can be a plate body structure or a rack. The position adjusting module 440 refers to a module that allows the jig module 410 to be movably arranged on the bearing table 430, thereby realizing the relative position adjustment of the jig module 410 and the bearing table 430 to meet the hot melting demand of the corresponding position on the electrode assembly 22. The position adjusting module 440 can realize the adjustment of the jig module 410 in one direction, or can realize the position adjustment of the jig module 410 in multiple directions, which can be determined according to actual conditions.

[0121] By arranging the position adjusting module 440 between the bearing table 430 and the jig module 410, the position adjusting module 440 can make the jig module 410 movable on the bearing table 430 to realize the position adjustment of the jig module 410, thereby meeting the hot melting position adjustment demand of the electrode assembly 22.

[0122] According to some embodiments of the present application, referring to FIGS. 8 and 9, FIG. 8 is a structural schematic view of a tab shaping device according to some embodiments of the present application, and FIG. 9 is a side view of the tab shaping device in FIG. 8. The position adjusting module 440 includes a first guide part 441 and a first moving seat 442, which are arranged along the first direction X on the bearing table 430. The first moving seat 442 is slidably arranged on the first guide part 441 along the first direction X, and the jig module 410 is arranged on the first moving seat 442. The first direction X is perpendicular to the positioning surface.

[0123] The first guide part 441 refers to a component that can guide the movement of the first moving seat 442. The first guide part 441 can be various guide structures, such as a sliding groove, a sliding rail, or a guide rod. In the present embodiment, the first guide part 441 is a sliding rail.

[0124] The first moving seat 442 refers to a component that can move along the extension direction of the first guide part 441. In the present embodiment, the first moving seat 442 is a sliding block component, and the first moving seat 442 and the first guide part 441 are in sliding fit. The first moving seat 442 can drive the movement of the jig module 410 manually or automatically by a motor, a gas pump, etc. In the present embodiment, the moving seat is manually adjusted and moved. The jig module 410 is correspondingly provided with a handle 413. An operator can act on the handle 413 to drive the position adjustment of the jig module 410. If the positioning surface is taken as a reference surface, the first direction X can be any specific direction perpendicular to the positioning surface.

[0125] The jig module 410 is arranged on the first moving seat 442 through the sliding cooperation of the first guide part 441 and the first moving seat 442, so that the jig module 410 can move along the first direction X on the bearing table 430 to realize the position adjustment of the jig module 410 along the first direction X.

[0126] According to some embodiments of the present application, please refer to FIG. 3 and FIG. 5, FIG. 3 is a front view of the tab shaping device according to some embodiments of the present application;

[0127] FIG. 5 is a structural schematic diagram of the first moving seat of the position adjustment module in the tab shaping device according to some embodiments of the present application. The position adjustment module 440 includes a first guide part 441, a first moving seat 442 and a second guide part 443. The first guide part 441 is arranged along the first direction X on the bearing table 430, and the first moving seat 442 is arranged along the first direction X on the first guide part 441 in a sliding manner. The second guide part 443 is arranged along the second direction Y on the first moving seat 442, and the jig module 410 is arranged along the second direction Y on the second guide part 443 in a sliding manner. The first direction X and the second direction Y are both perpendicular to the positioning surface, and the first direction X and the second direction Y are perpendicular.

[0128] The second guide part 443 refers to a component capable of guiding the movement of the jig module 410. The second guide part 443 can be various guide structures, such as a sliding groove, a sliding rail or a guide rod, etc. In the present embodiment, the second guide part 443 is a sliding rail.

[0129] Taking the positioning surface as the reference surface, the first direction X and the second direction Y are both perpendicular to the positioning surface, that is, the first direction X can be any specific direction perpendicular to the positioning surface. The second direction Y is perpendicular to the first direction X, so the second direction Y is the direction perpendicular to the first direction X.

[0130] The second guide part 443 is arranged on the first moving seat 442 through the sliding cooperation of the first guide part 441 and the first moving seat 442, and the jig module 410 is arranged on the second guide part 443 in a sliding manner. Therefore, the jig module 410 can move on the bearing table 430 along the first direction X and the second direction Y, and the position adjustment of the jig module 410 can be realized along the first direction X and the second direction Y. The position adjustment of the jig module 410 is more flexible, the position adjustment demand of the hot melting module 420 is reduced, and the structure of the hot melting module 420 is simplified.

[0131] According to some embodiments of the present application, please continue to refer to FIG. 5, which is a structural schematic diagram of a first moving seat of a position adjusting module in a tab shaping device according to some embodiments of the present application. The tab shaping device 400 further comprises a limiting module 450, which is arranged on the bearing table 430. The limiting module 450 is used to limit the position of the jig module 410.

[0132] Since the jig module 410 can move on the bearing table 430, after the position of the jig module 410 is adjusted to be in place, the limiting module 450 refers to a component that can limit the position of the jig module 410 and prevent the jig module 410 from moving on the bearing table 430. The limiting module 450 can be various limiting mechanisms. For example, the limiting module 450 can be a pressing plate or multiple limiting parts 451. In the case of the limiting module 450 being a pressing plate, after the jig module 410 is moved to be in place, the pressing plate exerts a downward pressure on the jig module 410, thereby preventing the jig module 410 from moving.

[0133] By arranging the limiting module 450 on the bearing table 430, the limiting module 450 can limit the position of the jig module 410 that has been adjusted to be in place, which is conducive to the hot melting module 420 performing hot melting work on the area of the electrode assembly 22 where the adhesive paper 23 is located.

[0134] According to some embodiments of the present application, the limiting module 450 comprises multiple limiting parts 451, which are distributed on the outer circumferential side of the jig module 410. Each limiting part 451 comprises a body 4511 and a limiting piece 4512. The body 4511 is arranged on the bearing table 430, and the limiting piece 4512 is telescopically arranged on the body 4511 along the first direction X or the second direction Y. The opposite ends of the multiple limiting pieces 4512 respectively abut against the outer circumferential side of the jig module 410.

[0135] The body 4511 is used for mounting the limiting piece 4512. The body 4511 can have an L-shaped cross section, comprising a horizontal part and a vertical part. The vertical part is connected perpendicularly to one side of the horizontal part. The body 4511 can be connected to the bearing table 430 through the horizontal part, and the vertical part is used for mounting the limiting piece 4512. The limiting piece 4512 can be various limiting parts 451, such as a pneumatic cylinder, a hydraulic cylinder, or a screw rod. The number of limiting parts 451 can be multiple, such as four, five, six, or eight. In this embodiment, the number of limiting parts 451 is eight, and the eight limiting parts 451 are divided into four groups of limiting mechanisms. Each group of limiting mechanisms comprises two limiting parts 451, which limit one side of the jig module 410.

[0136] By the cooperation of the plurality of limiting parts 451, the outer circumferential side of the jig module 410 has the limiting part 451 on each side to block and limit the jig module 410. The limiting part 4512 is telescopically arranged on the body 4511. The telescopic function of the limiting part 4512 can realize the yielding of the jig module 410 during the position adjustment of the jig module 410 and the limiting function of the jig module 410 after the position adjustment.

[0137] According to some embodiments of the present application, the limiting part 4512 is in threaded cooperation with the body 4511.

[0138] The limiting part 4512 can be an adjusting screw, and the body 4511 is correspondingly provided with a threaded hole for the limiting part 4512 to pass through. The adjusting screw is in threaded cooperation with the threaded hole of the body 4511.

[0139] Specifically, when the jig module 410 needs to be adjusted in position, the telescopic length of the limiting part 4512 can be shortened to yield the jig module 410 and reduce the risk of interference between the limiting part 4512 and the jig module 410. When the position of the jig module 410 is adjusted in place, the limiting part 4512 is rotated to move the extending end of the limiting part 4512 towards the jig module 410 and abut against the jig module 410 to complete the abutment and limiting of the jig module 410 on the side.

[0140] By the threaded cooperation between the limiting part 4512 and the body 4511, the extending length of the limiting part 4512 extending from the body 4511 can be realized by rotating the limiting part 4512, so as to realize the limiting and yielding functions of the jig module 410.

[0141] According to some embodiments of the present application, please refer to FIG. 6 and FIG. 7, FIG. 6 is a structure schematic view of a hot melting module in a tab shaping device according to some embodiments of the present application; and FIG. 7 is a front view of the hot melting module in the tab shaping device according to some embodiments of the present application. The driving part 422 is used to drive the hot melting head 421 to move along the third direction Z perpendicular to the positioning surface to approach or move away from the jig module 410.

[0142] The hot melting head 421 is driven by the driving part 422 to approach the electrode assembly 22 on the jig module 410 along the third direction Z perpendicular to the positioning surface to perform hot melting on the electrode assembly 22, so as to realize the hot melting operation of the hot melting module 420. After the hot melting is completed, the hot melting head 421 is driven by the driving part 422 to move away from the electrode assembly 22, so as to facilitate the adjustment of the hot melting position on the electrode assembly 22.

[0143] According to some embodiments of the present application, please continue to refer to FIG. 6 and FIG. 7, the hot melting module 420 further comprises a lifting frame 423 and a connecting piece 424, the lifting frame 423 is connected with the driving piece 422; the hot melting head 421 is installed on the lifting frame 423 through the connecting piece 424, the connecting piece 424 is movably arranged on the lifting frame 423 along the first direction X and / or the second direction Y, so as to adjust the relative position of the hot melting head 421 and the lifting frame 423, and the third direction Z, the first direction X and the second direction Y are perpendicular to each other.

[0144] The lifting frame 423 is a frame structure, and a cylinder joint 4232 is correspondingly arranged on the lifting frame 423, and the driving piece 422 is connected to the cylinder joint 4232, so as to drive the lifting frame 423 to move up and down, so as to realize that the hot melting head 421 is close to or away from the jig module 410. The connecting piece 424 refers to a connecting component for installing the hot melting head 421 on the lifting frame 423.

[0145] The third direction Z is perpendicular to the positioning surface, if the positioning surface is a horizontal plane, then the third direction Z is a vertical direction. The first direction X is perpendicular to the third direction Z, that is, the first direction X can be any specific direction on the horizontal plane. The second direction Y is perpendicular to the first direction X, so the second direction Y is the direction perpendicular to the first direction X on the horizontal plane.

[0146] The hot melting head 421 is installed on the lifting frame 423 through the connecting piece 424, and the connecting piece 424 is movably installed on the lifting frame 423, the position of the hot melting head 421 can be finely adjusted on the lifting frame 423, so as to realize flexible movement between the two hot melting areas 250 of the electrode assembly 22, without the need to re-adjust the position of the jig module 410, and the hot melting efficiency of the hot melting head 421 is correspondingly improved.

[0147] According to some embodiments of the present application, please continue to refer to FIG. 6, the lifting frame 423 has a sliding groove 4231 extending along the first direction X and / or the second direction Y, the connecting piece 424 comprises a body part 4241 and a locking piece 4242, the body part 4241 is slidably arranged in the sliding groove 4231, one end of the body part 4241 is connected with the hot melting head 421, and the other end of the body part 4241 is threadedly matched with the locking piece 4242.

[0148] The body part 4241 is movably arranged in the sliding groove 4231, the sliding groove 4231 is a long strip-shaped groove, the extending direction of the sliding groove 4231 is the first direction X or the second direction Y, the body part 4241 is arranged in the sliding groove 4231 and is in sliding cooperation with the sliding groove 4231, the hot melting head 421 is connected to the lower end of the body part 4241, and the locking part 4242 is connected to the upper end of the body part 4241. Since the locking part 4242 is in threaded cooperation with the upper end of the body part 4241, when the locking part 4242 is loosened, the body part 4241 loses the pressing effect of the locking part 4242, so that the body part 4241 can be moved in the length direction of the sliding groove 4231, thereby adjusting the position of the hot melting head 421. When the position of the hot melting head 421 is adjusted to the right position, the locking part 4242 is tightened, the locking part 4242 is tightly attached to the top of the lifting frame 423, so that the body part 4241 is positioned in the sliding groove 4231 and cannot slide in the sliding groove 4231.

[0149] By movably arranging the body part 4241 in the sliding groove 4231, the locking part 4242 is in threaded cooperation with the upper end of the body part 4241, only the locking part 4242 needs to be rotated, and the locking or unlocking of the body part 4241 in the sliding groove 4231 can be realized, which is convenient to operate.

[0150] According to some embodiments of the present application, referring to FIG. 1, the hot melting module 420 further comprises a stand 425, the driving part 422 is installed on the stand 425, and the lifting frame 423 has a guide rod 426 extending in the third direction Z, the guide rod 426 is in penetrating cooperation with the stand 425 to guide the lifting frame 423 to move in the third direction Z relative to the stand 425.

[0151] The stand 425 is a frame structure, and the function of the stand 425 is to provide a bearing function for the driving part 422, so that the driving part 422 can be installed above the jig module 410. The stand 425 can be various frame structures, for example, the stand 425 can be an L-shaped frame, a triangular support frame, a rectangular frame or a door-shaped frame.

[0152] In some embodiments, the stand 425 is a door-shaped frame, the stand 425 includes two vertical rods 4251 and a horizontal rod 4252 connected between the top ends of the two vertical rods 4251, and the driving part 422 is installed on the horizontal rod 4252.

[0153] The guide rod 426 is a rod member for guiding the movement of the lifting frame 423 in the third direction Z, and the stand 425 is correspondingly provided with a guide device for the guide rod 426 to penetrate, the guide device can be a guide sleeve or a guide hole, the guide rod 426 penetrates the guide device of the stand 425, and the guide device has a guiding and limiting function for the guide rod 426, and the guide rod 426 can only move in the third direction Z.

[0154] The guide rod 426 is arranged on the lifting frame 423 and guided by the stand 425, so that the stability of the lifting frame 423 during lifting is improved under the guidance of the guide rod 426 and the stand 425, and the hot melting precision of the hot melting module 420 is improved.

[0155] According to some embodiments of the present application, referring to FIGS. 8 and 9, the hot melting module 420 further includes a stand 425, and the driving member 422 is movably arranged on the stand 425 along a second direction Y perpendicular to the third direction Z.

[0156] The stand 425 is a frame structure, and the function of the stand 425 is to provide a bearing function for the driving member 422, so that the driving member 422 can be movably installed above the jig module 410. The first guide rail 427 for moving the driving member 422 is correspondingly arranged on the stand 425, and the guide rail extends along the second direction Y. The driving member 422 is provided with a sliding block corresponding to the first guide rail 427 through the mounting seat 428. Of course, the sliding block is provided with a locking structure corresponding to the sliding block, so as to realize the locking and unlocking of the sliding block. The second guide rail 429 is arranged on the mounting seat 428 and extends along the third direction Z. The sliding block is correspondingly arranged on the lifting frame 423, and the second guide rail 429 guides the lifting frame 423 to move along the third direction Z.

[0157] The driving member 422 can move on the stand 425, so that the jig module 410 can adjust the position of the hot melting module 420 in the second direction Y without having a second direction Y position adjustment function or without adjusting the position of the jig module 410 in the second direction Y. The relative position adjustment between the hot melting module 420 and the electrode assembly 22 on the jig module 410 in the second direction Y is realized, the selection is more flexible, and the application range is wider.

[0158] According to some embodiments of the present application, referring to FIG. 6, the hot melting head 421 is provided with a Teflon coating layer 4211 close to one end of the jig module 410.

[0159] The Teflon coating layer, also known as Teflon coating layer, is a very common coating material, which is made of polytetrafluoroethylene (PTFE). Polytetrafluoroethylene (Polytetrafluoroethylene, abbreviated as PTFE), commonly known as "plastic king", is a high molecular polymer made of tetrafluoroethylene as a monomer. PTFE is a material with low friction coefficient and excellent cold and hot resistance, so it is widely used in various fields, especially in the coating of kitchen utensils.

[0160] By setting a Teflon coating 4211 on the surface of the hot melt head 421, the Teflon coating 4211 can reduce the adhesion between the hot melt paper 23 and the hot melt head 421, and reduce the risk of paper 23 wire drawing.

[0161] According to some embodiments of the present application, please refer to FIG. 1, the tab shaping device 400 further comprises a control module and a control screen 460, the control screen 460 is used for inputting the hot melt parameters of the hot melt module 420, the control screen 460, the hot melt module 420 and the control module are electrically connected.

[0162] The control module is a PLC, and the PLC is a digital operation electronic system specially designed for application in an industrial environment. It uses a programmable memory to store instructions for performing logic operations, sequential control, timing, counting and arithmetic operations in its internal memory, and controls various types of mechanical equipment or production processes through digital or analog input and output.

[0163] The control screen 460 is used to input and display the hot melt parameters. The control screen 460 includes a screen area 461 and a button area 462. The button area 462 is used for inputting the hot melt parameters by the operator, and the hot melt parameters can include the hot melt temperature, the hot melt time and the pressing force. The screen area 461 is used to display the hot melt data of the hot melt module 420. The operator enters the hot melt parameters through the buttons of the button area 462 on the control screen 460, and the data is displayed in real time on the screen area 461.

[0164] Through the setting of the control screen 460, the operator can set the hot melt parameters of the hot melt module 420 by operating the control screen 460. The control module automatically controls the hot melt module 420 according to the hot melt parameters of the control screen 460, which has high automation degree and simplifies the manual operation.

[0165] According to some embodiments of the present application, please refer to FIG. 1, the tab shaping device 400 further comprises a hot melt sensor, which is arranged on the hot melt head 421 of the hot melt module 420, and is used to obtain the real-time temperature of the hot melt head 421.

[0166] The hot melt sensor is a conversion device that converts temperature into an electrical signal, which can be divided into two categories: active and passive. The working principle of the former is pyroelectric effect, thermoelectric effect and semiconductor junction effect.

[0167] During the hot melt process of the hot melt head 421 on the paper 23 of the electrode assembly 22, the hot melt sensor can obtain the real-time temperature of the hot melt head 421, and the control module can accurately adjust the temperature of the hot melt head 421 according to the temperature feedback by the hot melt sensor, so that the hot melt effect on the electrode assembly 22 is better.

[0168] According to some embodiments of the present application, the tab shaping device 400 further comprises an operation button 470, the operation button 470 is electrically connected with the control module, and the operation button 470 is used to start or stop the hot melting module 420.

[0169] The operation button 470 is used to control the driving member 422 (cylinder) to press down, and the driving member 422 automatically returns after the hot melting is completed or after a preset time interval.

[0170] The number of operation buttons 470 is two, and the hot melting module 420 works only when both of the operation buttons 470 are pressed. Compared with the case where the operation button 470 is one, the two operation buttons 470 can prevent accidental pressing and are safer.

[0171] The operator only needs to act on the operation button 470 to start or stop the hot melting module 420, and the operation is simple.

[0172] The embodiment of the present application further provides a battery manufacturing device, which comprises the tab shaping device 400 of the above embodiment.

[0173] The tab shaping device 400 is arranged between the rubber sticking device and the core combining device.

[0174] The embodiment of the present application further provides a tab shaping method, which comprises the following steps: welding a tab of an electrode assembly 22 and an adapter 24, sticking rubber paper 23 on both sides of the welding position respectively, and hot melting the rubber paper 23 on both sides of the welding position.

[0175] The rubber paper 23 can provide a binding force for the tab after the rubber paper 23 is stuck on both sides of the welding position after the tab of the electrode assembly 22 is welded with the adapter 24, and the rubber paper 23 on both sides of the welding position is hot melted to effectively fix the appearance of the tab of the electrode assembly 22, that is, to fix the appearance of the tab, thereby reducing the risk of tab redundancy and tab bifurcation or tab deformation, and further improving the reliability of the battery monomer.

[0176] According to some embodiments of the present application, the hot melting of the rubber paper 23 on both sides of the welding position comprises the following steps: hot melting the parts of the rubber paper 23 beyond the edges of the adapter 24 to fix the tab to the adapter 24 by the rubber paper 23.

[0177] The hot melting of the parts of the rubber paper 23 beyond the edges of the adapter 24 fixes the tab to the adapter 24 by the rubber paper 23, and the rubber paper 23 provides a binding force for the tab to fix the appearance of the tab, thereby reducing the risk of the tab deforming to contact the main body of the electrode assembly 22.

[0178] The electrode assembly 22 has a tab, the tab is welded with the adapter 24, the adhesive tape 23 is attached to both sides of the welding position of the tab and the adapter 24, and the adhesive tapes 23 on both sides of the welding position are hot melt connected.

[0179] The adhesive tapes 23 on both sides of the welding position of the electrode assembly 22 and the adapter 24 are hot melt connected, the adhesive tapes 23 provide restraint force to the tab, fix the topography of the tab, reduce the risk of deformation of the tab to contact the main area of the electrode assembly 22, and improve the reliability of the battery cell.

[0180] Please refer to FIG. 7, the battery cell includes a first electrode assembly 221 and a second electrode assembly 222, the first electrode assembly 221 has a first tab, the second electrode assembly 222 has a second tab, the adapter 24 is welded between the first tab and the second tab, the adhesive tapes 23 are attached to both sides of the welding position of the first tab and the adapter 24, and the second tab and the adapter 24, and the adhesive tapes 23 on both sides of the welding position of the first tab and the adapter 24, and the second tab and the adapter 24 are hot melt connected.

[0181] The adhesive tapes 23 on both sides of the welding position of the first tab and the adapter 24, and the second tab and the adapter 24 between the first electrode assembly 221 and the second electrode assembly 222 are hot melt connected, the first tab and the second tab are fixed to the adapter 24 by the adhesive tapes 23, the adhesive tapes 23 provide restraint force to the first tab and the second tab, fix the topography of the first tab and the second tab, reduce the risk of deformation of the first tab and the second tab to contact the main area of the first electrode assembly 221 or the second electrode assembly 222, and improve the reliability of the battery cell.

[0182] In some embodiments, please refer to FIG. 4, the hot melt area on the adhesive tape 23 between the tabs of the first electrode assembly 221 and the second electrode assembly 222 and the adapter 24 is a plurality of points, in this embodiment, the hot melt area includes eight hot melt areas 250, and the eight hot melt areas 250 are respectively and evenly distributed on the adhesive tape 23 between the first electrode assembly 221 and the second electrode assembly 222.

[0183] The working process of the tab shaping device 400 is as follows:

[0184] The tab shaping device 400 is used offline in a non-automated scenario and can be used as an experimental platform, so manual feeding can be used. The first electrode assembly 221 and the second electrode assembly 222 are fed to the jig module 410 of the tab shaping device 400, the size of the area enclosed by the positioning assembly 411 is adjusted, the positioning assembly 411 is used to position the electrode assembly 22, and the electrode assembly 22 (the first electrode assembly 221 and the second electrode assembly 222) is positioned on the positioning surface. The position adjusting module 440 is adjusted correspondingly, so that the hot melt head 421 of the hot melt module 420 is opposite the hot melt area 250 on the electrode assembly 22. The hot melt parameters are determined, and the hot melt parameters including the hot melt temperature, the hot melt time and the pressing force are set on the control screen 460. The pressing operation button 470 is started, the driving member 422 presses the hot melt head, the hot melt is completed, and the hot melt of two hot melt areas 250 can be completed at a time. The position of the jig module 410 is adjusted by the position adjusting module 440, and the hot melt of the eight hot melt areas 250 on the adhesive tape 23 is completed in turn.

[0185] According to some embodiments of the present application, referring to FIGS. 1-4, the tab shaping device 400 includes a jig module 410 and a hot melt module 420. The jig module 410 is used to position the electrode assembly 22, and the jig module 410 has a positioning surface for carrying the electrode assembly 22. The hot melt module 420 cooperates with the jig module 410 to hot melt connect the adhesive tapes 23 attached on both sides of the welding position. The jig module 410 includes a positioning assembly 411 for abutting at least two opposite sides of the electrode assembly 22 to position the electrode assembly 22. The positioning assembly 411 includes a plurality of abutting members 4111 that cooperate to abut the remaining three sides of the electrode assembly 22 except the side with the adapter 24. The jig module 410 further includes a positioning table 412, and at least one of the plurality of abutting members 4111 is movably arranged on the positioning table 412 to adjust the size of the area enclosed by the plurality of abutting members 4111.

[0186] The jig module 410 bears and positions the electrode assembly 22 to be hot-melted, maintains the relative position of the electrode assembly 22 during the hot-melting of the hot-melting module 420, and improves the hot-melting precision of the hot-melting module 420 on the hot-melt adhesive tape 23 at the welding position of the tab and the adapter 24. Then, through the cooperation of the hot-melting module 420 and the jig module 410, the hot-melting of the hot-melt adhesive tape 23 on the electrode assembly 22 is realized. The hot-melt adhesive tape 23 provides a restraining force for the tab, which can effectively fix the appearance of the tab of the electrode assembly 22, that is, the function of fixing the appearance of the tab is realized, the risk of tab bifurcation or tab deformation is reduced, and the redundancy risk of the tab is reduced, thereby improving the reliability of the battery cell. The positioning assembly 411 can abut at least two opposite sides of the electrode assembly 22, and can realize clamping positioning of the electrode assembly 22. The plurality of abutting pieces 4111 on the positioning assembly 411 are in contact with the plurality of side surfaces of the electrode assembly 22, and are not easy to interfere with the hot-melting module 420, which is beneficial to the hot-melting of the hot-melting module 420 on the electrode assembly 22. The abutting pieces 4111 are movably arranged on the positioning table 412, which can adapt to the positioning needs of electrode assemblies 22 of different models, and has a wider application range.

[0187] In some embodiments, referring to FIG. 5, the tab shaping device 400 further comprises a bearing table 430 and a position adjusting module 440. The position adjusting module 440 is arranged between the bearing table 430 and the jig module 410, and is used to movably arrange the jig module 410 on the bearing table 430 to adjust the relative position of the electrode assembly 22 on the jig module 410 and the hot-melting module 420. The position adjusting module 440 comprises a first guide part 441, a first moving seat 442 and a second guide part 443. The first guide part 441 is arranged along the first direction X on the bearing table 430. The first moving seat 442 is slidingly arranged on the first guide part 441 along the first direction X. The second guide part 443 is arranged along the second direction Y on the first moving seat 442. The jig module 410 is slidingly arranged on the second guide part 443 along the second direction Y. The first direction X and the second direction Y are both perpendicular to the positioning surface, and the first direction X and the second direction Y are perpendicular to each other. The tab shaping device 400 further comprises a limiting module 450. The limiting module 450 is arranged on the bearing table 430, and is used to limit the position of the jig module 410.

[0188] Please refer to FIG. 6 and FIG. 7, the hot melting module 420 comprises a hot melting head 421 and a driving member 422, the driving member 422 is used to drive the hot melting head 421 to move along the third direction Z to approach or move away from the jig module 410, the third direction Z is perpendicular to the positioning surface. The hot melting module 420 further comprises a lifting frame 423 and a connecting member 424, the lifting frame 423 is connected with the driving member 422; the hot melting head 421 is installed on the lifting frame 423 through the connecting member 424, the connecting member 424 is movably arranged on the lifting frame 423 along the first direction X and / or the second direction Y, so as to adjust the relative position of the hot melting head 421 and the lifting frame 423, the third direction Z, the first direction X and the second direction Y are perpendicular to each other. The hot melting module 420 further comprises a stand 425, the driving member 422 is installed on the stand 425, the lifting frame 423 has a guide rod 426 extending along the third direction Z, the guide rod 426 is in fit with the stand 425, so as to guide the lifting frame 423 to move along the third direction Z relative to the stand 425.

[0189] Through the sliding fit of the first guide part 441 and the first moving seat 442, the second guide part 443 is arranged on the first moving seat 442, and the jig module 410 is slidingly arranged on the second guide part 443, so that the jig module 410 can realize the movement along the first direction X and the second direction Y on the bearing table 430, the position of the jig module 410 can be adjusted along the first direction X and the second direction Y, the position adjustment of the jig module 410 is more flexible, the position adjustment requirement of the hot melting module 420 is reduced, and the structure of the hot melting module 420 is simplified. The limiting module 450 can limit the jig module 410 after the position adjustment, which is beneficial to the hot melting operation of the hot melting module 420 on the electrode assembly 22 of the electrode assembly 22. The driving member 422 drives the hot melting head 421 to approach the electrode assembly 22 on the jig module 410 to perform hot melting, so as to realize the hot melting operation of the hot melting module 420. After the hot melting is completed, the driving member 422 drives the hot melting head 421 to move away from the electrode assembly 22, so as to facilitate the adjustment of the hot melting position of the electrode assembly 22. The guide rod 426 is in fit with the stand 425, so that in the lifting process of the lifting frame 423 driven by the driving member 422, the stability of the lifting frame 423 in the lifting process is improved under the guiding fit of the guide rod 426 and the stand 425, and the hot melting precision of the hot melting module 420 is correspondingly improved.

[0190] In some other embodiments, referring to FIGS. 8 and 9, the position adjusting module 440 includes a first guide portion 441 and a first moving base 442, which are arranged along the first direction X on the bearing table 430; the first moving base 442 is slidingly arranged on the first guide portion 441 along the first direction X, the jig module 410 is arranged on the first moving base 442, and the first direction X is perpendicular to the positioning surface. The hot melting module 420 includes a hot melting head 421 and a driving member 422, which is used to drive the hot melting head 421 to move along the third direction Z to approach or move away from the jig module 410, and the third direction Z is perpendicular to the positioning surface. The hot melting module 420 further includes a lifting frame 423 and a connecting member 424, the lifting frame 423 is connected with the driving member 422; the hot melting module 420 further includes a vertical frame 425, and the driving member 422 is movably arranged on the vertical frame 425 along the second direction Y, and the second direction Y is perpendicular to the third direction Z.

[0191] The first guide rail 427 corresponding to the driving member 422 is arranged on the vertical frame 425, the guide rail is arranged along the second direction Y, the driving member 422 passes through the mounting seat 428 and is slidingly matched with the first guide rail 427 through the sliding block arranged on the mounting seat 428, of course, the locking structure is arranged on the sliding block to realize the locking and unlocking of the sliding block. The second guide rail 429 is arranged on the mounting seat 428, the second guide rail 429 is arranged along the third direction Z, and the lifting frame 423 is arranged on the sliding block corresponding thereto, and the second guide rail 429 guides the lifting frame 423 to move along the third direction Z.

[0192] The position adjusting module 440 can adjust the position of the jig module 410 along the first direction X, and the hot melting head 421 of the hot melting module 420 can move along the second direction Y and the third direction Z, which can also meet the hot melting of the hot melting area of the adhesive paper 23 of the electrode assembly 22 on the jig module 410.

[0193] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the application without departing from the scope of the application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tab shaping device for shaping a tab of an electrode assembly, the tab being welded with a adapter and having a piece of adhesive paper attached to each side of the welding position, the tab shaping device comprising: a jig module for positioning the electrode assembly, the jig module having a positioning surface for carrying the electrode assembly, the jig module comprising a positioning assembly for cooperating with at least one side of the electrode assembly to fix the electrode assembly to the positioning surface; a hot melting module comprising a hot melting head and a driving member for driving the hot melting head to approach or move away from the jig module so that the hot melting head cooperates with the jig module to melt and connect the pieces of adhesive paper attached to the two sides of the welding position to each other.

2. The tab trimming device according to claim 1, wherein The positioning assembly is configured to abut against at least two opposite sides of the electrode assembly to position the electrode assembly.

3. The tab trimming device according to claim 2, wherein The positioning assembly comprises a plurality of abutting members which cooperatively abut against the remaining three sides of the electrode assembly except the side having the tab.

4. The tab trimming device according to claim 3, wherein The jig module further comprises: a positioning table, at least one of the plurality of abutting members is movably arranged on the positioning table to adjust the area size of the region enclosed by the plurality of abutting members.

5. The tab trimming device according to claim 4, wherein The electrode assembly comprises a first electrode assembly and a second electrode assembly; The number of the positioning assemblies is two, and the two positioning assemblies are distributed apart on the positioning table and are respectively configured to position the first electrode assembly and the second electrode assembly.

6. The tab shaping apparatus of any one of claims 1-5, wherein, The tab shaping device further comprises: a carrying table; a position adjusting module arranged between the carrying table and the jig module, the position adjusting module is configured to movably arrange the jig module on the carrying table to adjust the relative position between the electrode assembly on the jig module and the hot melting module.

7. The tab trimming device according to claim 6, wherein The position adjusting module comprises: a first guide portion extending along a first direction and arranged on the carrying table; a first moving seat slidingly arranged on the first guide portion along the first direction, and the jig module is arranged on the first moving seat, and the first direction is perpendicular to the positioning surface.

8. The tab trimming device of claim 6, wherein The position adjusting module comprises: a first guide portion extending along a first direction and arranged on the carrying table; a first moving seat slidingly arranged on the first guide portion along the first direction; a second guide portion extending along a second direction and arranged on the first moving seat, and the jig module is slidingly arranged on the second guide portion along the second direction, and the first direction and the second direction are both perpendicular to the positioning surface, and the first direction is perpendicular to the second direction.

9. The tab trimming device of claim 6, wherein The tab shaping device further comprises: a limiting module arranged on the carrying table, the limiting module is configured to limit the position of the jig module.

10. The tab trimming device according to claim 9, wherein The limiting module comprises a plurality of limiting portions distributed on the outer periphery of the jig module; each limiting portion comprises a body arranged on the carrying table and a limiting member telescopically arranged on the body along a first direction or a second direction, and opposite ends of the plurality of limiting members abut against the outer periphery of the jig module.

11. The tab trimming device according to claim 10, wherein The limiting member is threadedly connected with the body.

12. The tab shaping apparatus of any one of claims 1-11, wherein, The driving member is configured to drive the hot-melt head to move along a third direction, which is perpendicular to the positioning surface.

13. The tab trimming device of claim 12, wherein The hot-melt module further comprises: a lifting frame connected with the driving member; a connecting member, through which the hot-melt head is installed on the lifting frame, the connecting member being movably arranged on the lifting frame along a first direction and / or a second direction, so as to adjust the relative position of the hot-melt head and the lifting frame, the third direction, the first direction and the second direction being perpendicular to each other.

14. The tab trimming device of claim 13, wherein The lifting frame is provided with a sliding groove extending along the first direction and / or the second direction, the connecting member comprising a body part and a locking member, the body part being slidably arranged in the sliding groove, one end of the body part being connected with the hot-melt head, and the other end of the body part being threadedly connected with the locking member.

15. The tab trimming device of claim 13, wherein The hot-melt module further comprises: a stand, the driving member being installed on the stand, the lifting frame being provided with a guide rod extending along the third direction, the guide rod being threadedly connected with the stand, so as to guide the movement of the lifting frame relative to the stand along the third direction.

16. The tab trimming device of claim 15, wherein The hot-melt module further comprises: a stand, the driving member being movably arranged on the stand along a second direction, the second direction being perpendicular to the third direction.

17. The tab reshaping apparatus of any one of claims 12-16, wherein, The hot-melt head is provided with a Teflon coating near one end of the jig module.

18. The tab shaping apparatus of any one of claims 1-17, wherein, The tab shaping device further comprises: a control module; a control panel, which is configured to input hot-melt parameters of the hot-melt module, the control panel, the hot-melt module and the control module being electrically connected.

19. The tab trimming device of claim 18, wherein The tab shaping device further comprises: a heat-sensitive sensor arranged on the hot-melt head of the hot-melt module, the heat-sensitive sensor being configured to obtain the real-time temperature of the hot-melt head.

20. The tab trimming apparatus of claim 18, wherein The tab shaping device further comprises: an operation button, which is electrically connected with the control module, and is configured to start or stop the hot-melt module.

21. A battery manufacturing device comprising the tab shaping device according to any one of claims 1-20.

22. A tab shaping method, comprising: welding a tab of an electrode assembly to an adapter, and pasting adhesive tapes on both sides of the welding position; hot-melt connecting the adhesive tapes pasted on both sides of the welding position with each other.

23. The tab trimming method according to claim 22, wherein The hot-melt connecting of the adhesive tapes pasted on both sides of the welding position with each other comprises: hot-melt connecting the portions of the adhesive tapes beyond the edges of the adapter with each other, so that the adhesive tapes fix the tab to the adapter.

24. A battery cell comprising an electrode assembly, an adapter and adhesive tapes, the electrode assembly having a tab, the tab being welded to the adapter, the adhesive tapes being pasted on both sides of the welding position of the tab and the adapter, and the adhesive tapes on both sides of the welding position being hot-melt connected.

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