Hot pressing cutting device and battery manufacturing equipment

Abstract

The embodiments of the present application provide a hot pressing and cutting device and a battery manufacturing device. The hot pressing and cutting device is used to heat seal and cut the isolation membrane on one side of the electrode assembly. The hot pressing and cutting device includes a jig module and a hot pressing and cutting module. The jig module has a positioning surface, and the positioning surface is used to carry the electrode assembly. The jig module includes a positioning component, and the positioning component is used to position the electrode assembly on the positioning surface; the hot pressing and cutting module cooperates with the jig module to heat seal the isolation membrane on one side of the electrode assembly and cut the excess isolation membrane on the electrode assembly. The technical solution provided by the present application has a simple structure, can achieve heat sealing and cutting of the isolation membrane of the electrode assembly, and has higher processing efficiency.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a hot pressing and cutting device and battery manufacturing equipment. Background Art

[0002] Energy conservation and emission reduction are 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 advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] During the early testing and verification production stages of the battery, the isolation membrane of the electrode assembly separates the positive and negative electrode materials and before they are soaked in electrolyte. During the process of wrapping the electrode pieces, a portion of the isolation membrane will be reserved to extend outward. After the heat sealing process, the excess isolation membrane needs to be cut off. The heat sealing and cutting steps usually need to be completed independently on two sets of equipment, resulting in complex processes and low efficiency. Utility Model Content

[0004] The present application provides a hot pressing and cutting device and battery manufacturing equipment, which have a simple structure, can achieve heat sealing and cutting of the isolation film of the electrode assembly, and have higher processing efficiency.

[0005] This application is achieved through the following technical solutions:

[0006] In the first aspect, an embodiment of the present application provides a hot pressing and cutting device, which is used to heat seal and cut the isolation film on one side of the electrode assembly. The hot pressing and cutting device includes a jig module and a hot pressing and cutting module. The jig module has a positioning surface, which is used to support the electrode assembly. The jig module includes a positioning component, which is used to position the electrode assembly on the positioning surface; the hot pressing and cutting module cooperates with the jig module to heat seal the isolation film on one side of the electrode assembly and cut off the excess isolation film on the electrode assembly.

[0007] In this solution, the electrode assembly to be heat-sealed and cut is carried and positioned by the jig module, and the positioning assembly cooperates with the electrode assembly to fix the electrode assembly on the positioning surface, keeping the position of the electrode assembly on the positioning surface unchanged, thereby improving the accuracy of the heat-sealing and cutting of the isolation film on one side of the electrode assembly by the hot pressing and cutting module. Then, the hot pressing and cutting module cooperates with the jig module to heat-seal and combine the multi-layer isolation film to be heat-sealed on one side of the electrode assembly, and the excess isolation film on the electrode assembly is cut synchronously, that is, the hot pressing and cutting module can realize the two-step process of heat-sealing and cutting the isolation film on the electrode assembly at one time, compared with the prior art in which heat-sealing and cutting are performed independently in steps, while shortening the processing flow, reducing multiple repeated loading actions, and improving production efficiency.

[0008] 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.

[0009] In the above scheme, the positioning component can be supported on at least two opposite sides of the electrode assembly, so as to limit the two sides of the electrode assembly. The positioning component is in contact with the two opposite sides of the electrode assembly, and is not easy to interfere with the hot pressing and cutting module, which is beneficial for the hot pressing and cutting module to heat seal and cut the electrode assembly.

[0010] According to some embodiments of the present application, the positioning assembly includes a plurality of abutting members, and the plurality of abutting members cooperate together to abut the remaining three side surfaces of the electrode assembly except the side to be heat-sealed and cut.

[0011] In the above scheme, a plurality of abutting members are used to abut against the other three sides of the electrode assembly except the side to be heat-sealed and cut. In this way, except the side to be heat-sealed and cut, the other three sides of the electrode assembly have abutting members to realize the abutting and limiting function, which has a better positioning effect on the electrode assembly and makes it less likely for the electrode assembly to move.

[0012] According to some embodiments of the present application, the fixture module further includes a supporting platform, and at least one of the plurality of resisting members is movably disposed on the supporting platform to adjust the size of the area enclosed by the plurality of resisting members.

[0013] In the above scheme, by movably arranging the abutting members on the supporting platform, the size of the area enclosed by the multiple abutting members can be adjusted, so that it can adapt to the positioning requirements of electrode assemblies of different models, and the application range of the fixture module is wider.

[0014] According to some embodiments of the present application, the supporting member includes a first supporting member, which is used to support the first side of the electrode assembly having a pole ear and a second side of the electrode assembly arranged opposite to the pole ear; the first supporting member is movably arranged on the supporting platform along a first direction and a second direction, the first direction is the length direction of the electrode assembly, and the second direction is the width direction of the electrode assembly.

[0015] In the above scheme, since one side of the electrode assembly has a protruding pole ear, the first holding member can be movably arranged on the supporting platform in the first direction and the second direction through the first holding member, that is, the position of the first holding member can be adjusted in two directions. When the position of the first holding member is adjusted in the second direction, the first holding member can be staggered with the pole ear of the electrode assembly, reducing the risk of interference between the first holding member and the pole ear. Then, the position of the first holding member in the first direction is adjusted so that the first holding member can contact the corresponding side of the electrode assembly, thereby realizing the limiting function of the electrode assembly.

[0016] According to some embodiments of the present application, the fixture module further includes a cover plate, which is flippably disposed on the supporting platform, and the cover plate is used to cover a side of the electrode assembly away from the positioning surface.

[0017] In the above scheme, in order to further improve the positioning effect of the electrode assembly, the cover plate can be set to cover the side of the electrode assembly away from the positioning surface, thereby achieving clamping positioning of the electrode assembly in the thickness direction, and the positioning effect of the electrode assembly is better.

[0018] According to some embodiments of the present application, the hot pressing and cutting module includes a stand, a hot pressing head and a first driving member; the first driving member is arranged on the stand, and the first driving member is used to drive the hot pressing head to move along a third direction so that the hot pressing head approaches or moves away from the positioning assembly, and the third direction is perpendicular to the positioning surface.

[0019] In the above scheme, the hot pressing head can be moved along the third direction under the action of the first driving member, that is, the hot pressing head can be moved closer to or farther away from the electrode assembly on the positioning surface through the first driving member. In this way, the electrode assembly does not need to adjust the position after the positioning is completed, and the heat sealing of the isolation membrane on one side of the electrode assembly can be achieved by only driving the hot pressing head to move through the first driving member.

[0020] According to some embodiments of the present application, the hot pressing and cutting module also includes a first lifting frame and a first guide portion, the first lifting frame is connected to the first driving member, and the first lifting frame is used for installing the hot pressing head; the first guide portion is arranged between the first lifting frame and the vertical frame, and the first guide portion is used to guide the first lifting frame to move along a third direction relative to the vertical frame.

[0021] In the above scheme, the first guide portion is arranged so that, under the action of the first driving member, the first guide portion can guide the first lifting frame, so that the first lifting frame can be accurately and smoothly lifted along the third direction, thereby realizing the function of accurately heat sealing the isolation membrane on one side of the electrode assembly.

[0022] According to some embodiments of the present application, the hot pressing and cutting module further includes a cutter and a second driving member; the second driving member is disposed on the stand, and the second driving member is used to drive the cutter to move along a third direction so as to make the cutter approach or move away from the positioning assembly.

[0023] In the above scheme, the cutter can be moved along the third direction under the action of the second driving member, that is, the cutter can be moved closer to or farther away from the electrode assembly on the positioning surface through the second driving member. In this way, the electrode assembly does not need to adjust the position after the positioning is completed, and the cutting action of the isolation film on one side of the electrode assembly can be achieved by only driving the cutter to move through the second driving member.

[0024] According to some embodiments of the present application, the hot pressing and cutting module also includes a second lifting frame and a second guide portion, the second lifting frame is connected to the second driving member, and the second lifting frame is used for installing the cutter; the second guide portion is arranged between the second lifting frame and the vertical frame, and the second guide portion is used to guide the second lifting frame to move along a third direction relative to the vertical frame.

[0025] In the above scheme, the second guide portion is set, and under the action of the second driving member, the second guide portion can guide the second lifting frame, so that the second lifting frame can be accurately and smoothly lifted along the third direction, ensuring the precise cutting of the isolation membrane on one side of the electrode assembly.

[0026] According to some embodiments of the present application, the hot pressing head is provided with an avoidance hole for the cutter to pass through, and the cutter is used to cut off the excess isolation film on one side of the electrode assembly after passing through the avoidance hole.

[0027] In the above scheme, since heat sealing takes a longer time than cutting, an avoidance hole for the cutter to pass through is provided on the heat press head. In this way, during the process of heat sealing the isolation membrane by the heat press head, the cutter can pass through the avoidance hole on the heat press head under the action of the second driving member to cut the excess isolation membrane. That is, the heat sealing and cutting of the isolation membrane on the electrode assembly can be carried out simultaneously, and there is no need to adjust the position of the electrode assembly or reposition it, which greatly improves the efficiency of heat sealing and cutting of the isolation membrane and shortens the processing time.

[0028] According to some embodiments of the present application, the hot pressing and cutting module also includes a position adjustment component, which is arranged between the second lifting frame and the cutter, and the position adjustment component is used to adjust the position of the cutter in a second direction, where the second direction is the width direction of the electrode assembly, and the second direction is perpendicular to the third direction.

[0029] In the above scheme, by providing a position adjustment component on the second lifting frame and the cutter, the position adjustment component can adjust the position of the cutter in the second direction, and can fine-tune the position of the cutter according to the actual cutting needs of the isolation film, so the application range is wider.

[0030] According to some embodiments of the present application, the position adjustment assembly includes a mounting seat, an adjusting screw, a tool holder and a third guide portion, the mounting seat is arranged on the second lifting frame; the adjusting screw is extended along the second direction, and the adjusting screw is rotatably mounted on the mounting seat; the tool holder is used for installing the cutter, and the tool holder and the adjusting screw are threadedly matched; the third guide portion is extended along the second direction and is arranged on the second lifting frame, and the tool holder and the third guide portion are slidably matched.

[0031] In the above scheme, the adjusting screw is rotatably installed on the second lifting frame through the mounting seat, and the tool holder can be used for installing the cutter. The tool holder and the adjusting screw are threadedly matched. By rotating the adjusting screw, under the guiding action of the third guide part on the tool holder, the tool holder can be prevented from rotating with the adjusting screw, thereby driving the tool holder to adjust its position along the third guide part in the second direction. By controlling the rotation amount of the adjusting screw, the position adjustment amount of the tool holder in the second direction can be accurately controlled. The adjustment is convenient and quick, the operation is simple, and the adjustment accuracy is high.

[0032] According to some embodiments of the present application, the hot pressing and cutting device further includes a frame, which is used to carry the jig module and the hot pressing and cutting module; and movable wheels are provided at the bottom of the frame.

[0033] In the above scheme, the frame can be used to install the jig module and the hot pressing and cutting module, providing a bearing function for the jig module and the hot pressing and cutting module. By arranging movable wheels at the bottom of the frame, the hot pressing and cutting device can be transferred according to needs, which has strong flexibility.

[0034] In a second aspect, an embodiment of the present application further provides a battery manufacturing device, the battery manufacturing device comprising the hot pressing and cutting device of any of the aforementioned embodiments.

[0035] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the structure of a hot pressing and cutting device provided in some embodiments of the present application;

[0038] Figure 2 A schematic structural diagram of a hot pressing and cutting device from another angle provided in some embodiments of the present application;

[0039] Figure 3 A top view of the positioning of a jig module and an electrode assembly in a hot pressing cutting device provided in some embodiments of the present application;

[0040] Figure 4 A side view of a hot pressing and cutting device provided for some embodiments of the present application;

[0041] Figure 5 for Figure 4A is an enlarged schematic diagram;

[0042] Figure 6 for Figure 4 A magnified schematic diagram of B;

[0043] Figure 7 A schematic diagram of the structure of a hot pressing and cutting device including a frame provided in some embodiments of the present application;

[0044] Figure 8 for Figure 7 A schematic structural diagram of the hot pressing and cutting device from another angle.

[0045] Icons: 100-hot pressing and cutting device; 10-jig module; 11-carrying platform; 111-positioning surface; 12-positioning assembly; 120-resisting member; 121-first resisting member; 1211-adjusting hole; 122-second resisting member; 123-first slide rail; 1231-connecting hole; 13-cover plate; 20-hot pressing and cutting module; 21-stand; 211-column; 212-mounting plate; 22-hot pressing head; 221-avoidance hole ; 23-first driving member; 24-first lifting frame; 25-first guide part; 26-cutter; 27-second driving member; 28-second lifting frame; 29-second guide part; 30-position adjustment assembly; 31-mounting seat; 32-adjusting screw; 33-knife holder; 34-third guide part; 40-frame; 50-moving wheel; 200-electrode assembly; 201-isolating membrane; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0048] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0051] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0052] In the present application, the battery may include a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. The battery may be cylindrical, flat, rectangular or other shapes, etc., which is not limited in the embodiments of the present application.

[0053] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0054] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector. The negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer. The negative electrode collector not coated with the negative electrode active material layer serves as the negative electrode tab. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene).

[0055] The battery cell also includes a packaging film and a shell. The packaging film is coated on the outside of the electrode assembly, and the shell encapsulates the electrode assembly coated with the packaging film to form a battery cell. The packaging film can be a Mylar film, and the shell can be an aluminum shell. After the electrode assembly is formed, the Mylar film and the shell are encapsulated through the Mylar wrapping process and the shelling process. Among them, the Mylar film plays the role of sealing and protecting the electrode assembly, and the Mylar film can effectively insulate the electrode assembly and the shell from each other to avoid internal short circuits in the battery cell. The shell plays a protective role.

[0056] At present, solid-state batteries have unparalleled advantages in terms of safety and energy density, and are an important direction for the future development of the lithium battery industry. In the preparation process of solid-state batteries, the electrode assembly is a stacked electrode assembly. After the positive and negative electrode sheets in the electrode assembly are stacked and placed with the isolation membrane, an isolation membrane area that requires high-temperature hot pressing and sealing is generated. After the high-temperature and high-pressure sealing is completed, the excess isolation membrane needs to be cut off again to further complete the process operations such as shelling and liquid injection. However, the existing device structure has a single function, such as only heat sealing or cutting functions. The heat sealing and cutting processes of the electrode assembly usually need to be completed independently on two sets of equipment, which has the problems of complex process and low efficiency.

[0057] In view of this, in order to solve the problem of low processing efficiency of heat sealing and cutting of excess isolation film of electrode assembly, some embodiments of the present application provide a hot pressing and cutting device, which includes a jig module and a hot pressing and cutting module. The jig module has a positioning surface, which is used to support the electrode assembly. The jig module includes a positioning component, which is used to position the electrode assembly on the positioning surface. The hot pressing and cutting module cooperates with the jig module to heat seal the isolation film on one side of the electrode assembly and cut the excess isolation film on the electrode assembly.

[0058] In such a hot pressing and cutting device, the hot pressing and cutting module cooperates with the jig module to heat-seal the multi-layer isolation film to be heat-sealed on one side of the electrode assembly together, and the excess isolation film on the electrode assembly is cut synchronously. That is, the hot pressing and cutting module can realize the two-step process of heat-sealing and cutting the isolation film on the electrode assembly at one time. Compared with the prior art in which heat sealing and cutting are performed independently in steps, the processing flow is shortened, multiple repeated loading actions are reduced, and production efficiency is improved.

[0059] The present application embodiment provides a hot pressing cutting device, please refer to Figure 1 , Figure 2 and Figure 3 The hot pressing and cutting device 100 is used to heat seal and cut the isolation film 201 on one side of the electrode assembly 200. The hot pressing and cutting device 100 includes a jig module 10 and a hot pressing and cutting module 20. The jig module 10 has a positioning surface 111, and the positioning surface 111 is used to carry the electrode assembly 200. The jig module 10 includes a positioning component 12, and the positioning component 12 is used to position the electrode assembly 200 on the positioning surface 111; the hot pressing and cutting module 20 cooperates with the jig module 10 to heat seal the isolation film 201 on one side of the electrode assembly 200 and cut the excess isolation film 201 on the electrode assembly 200.

[0060] The battery in this embodiment is a solid-state battery. During the preparation of the (semi-) solid-state battery, after the positive and negative electrode sheets in the electrode assembly 200 are stacked with the isolation membrane 201, an isolation membrane 201 area that requires high-temperature hot pressing and sealing is generated. After the multi-layer stacked isolation membrane 201 is heat-sealed under high temperature and high pressure, the excess isolation membrane 201 needs to be cut off again to further complete the process operations such as shelling and liquid injection.

[0061] The jig module 10 is a positioning tool. The function of the jig module 10 is to carry and position the electrode assembly 200. When the hot pressing and cutting module 20 heat seals and cuts the isolation film 201 on one side of the electrode assembly 200, the relative position of the electrode assembly 200 can be maintained.

[0062] The positioning component 12 is used to position the electrode component 200 on the fixture module 10 so that the position of the electrode component 200 does not change during heat sealing or cutting, thereby ensuring processing accuracy.

[0063] The positioning assembly 12 can cooperate with at least one side of the electrode assembly 200, that is, the positioning assembly 12 can cooperate with one side or multiple sides of the electrode assembly 200, depending on the structure of the positioning assembly 12. For example, the positioning assembly 12 can be a positioning component such as a clamping cylinder, a pressing cylinder, a vacuum adsorption component, or a holding component 120.

[0064] When the positioning component 12 is a vacuum adsorption component, the positioning component 12 can be adsorbed and cooperated with the bottom surface of the electrode assembly 200, and the vacuum adsorption component is used to generate negative pressure on the bottom of the electrode assembly 200, so that the electrode assembly 200 is adsorbed and fixed on the fixture module 10, and the positioning function can also be provided to the electrode assembly 200, that is, the positioning component 12 cooperates with one side of the bottom surface of the electrode assembly 200.

[0065] When the positioning assembly 12 is a downward pressure cylinder, the downward pressure cylinder may contact the top surface of the electrode assembly 200 to provide downward pressure to the electrode assembly 200 , thereby positioning the electrode assembly 200 on the fixture module 10 .

[0066] When the positioning assembly 12 is a clamping cylinder, the clamping cylinder can be used to clamp the electrode assembly 200 on two opposite sides, thereby achieving the positioning of the electrode assembly 200. In other words, when the positioning assembly 12 is a clamping cylinder or abutting member 120, the positioning assembly 12 can cooperate with multiple sides of the electrode assembly 200 to achieve the positioning and fixing of the electrode assembly 200.

[0067] The hot pressing and cutting module 20 integrates the dual functions of hot pressing and cutting. The function of the hot pressing and cutting module 20 is to heat-seal and combine the multi-layer isolation film 201 on one side of the electrode assembly 200 on the fixture module 10, and cut off the excess part of the heat-sealed isolation film 201. The hot pressing and cutting device can be used in the laboratory. In the early test and verification production stage of the electrode assembly 200, a part of the isolation film 201 will be reserved during the process of wrapping the pole piece, and the excess isolation film 201 will be cut off after the heat sealing process.

[0068] The hot pressing and cutting module 20 and the jig module 10 cooperate to achieve heat sealing and cutting of the electrode assembly 200, which can be in various situations. The first situation is that the hot pressing and cutting module 20 is stationary, and the jig module 10 moves, and the jig module 10 drives the electrode assembly 200 to move to the hot pressing and cutting module 20 for the hot pressing and cutting module 20 to perform hot pressing and cutting. The second situation is that the hot pressing and cutting module 20 moves, the jig module 10 is stationary, and the hot pressing and cutting module 20 moves to the target position to cooperate with the electrode assembly 200 of the jig module 10 to perform heat sealing and cutting operations. The third situation is that the hot pressing and cutting module 20 moves, and the jig module 10 can also move, and the two cooperate with each other to move, thereby achieving the heat sealing and cutting operations of the hot pressing and cutting module 20 and the electrode assembly 200 on the jig module 10.

[0069] In this solution, the electrode assembly 200 to be heat-sealed and cut is carried and positioned by the jig module 10, and the positioning assembly 12 cooperates with the electrode assembly 200, so as to fix the electrode assembly 200 on the positioning surface 111, and keep the position of the electrode assembly 200 on the positioning surface 111 unchanged, thereby improving the accuracy of heat-sealing and cutting the isolation film 201 on one side of the electrode assembly 200 by the hot pressing and cutting module 20. Then, the hot pressing and cutting module 20 cooperates with the jig module 10 to heat-seal and combine the multi-layer isolation film 201 to be heat-sealed on one side of the electrode assembly 200, and the redundant isolation film 201 on the electrode assembly 200 is cut synchronously, that is, the hot pressing and cutting module 20 can realize the two-step process of heat-sealing and cutting the isolation film 201 on the electrode assembly 200 at one time, compared with the prior art in which heat-sealing and cutting are performed independently in steps, the processing flow is shortened, multiple repeated feeding actions are reduced, and production efficiency is improved.

[0070] According to some embodiments of the present application, the positioning assembly 12 is used to abut against at least two opposite sides of the electrode assembly 200 to position the electrode assembly 200 .

[0071] The positioning component 12 can be supported on at least two opposite sides of the electrode assembly 200, so as to limit the two sides of the electrode assembly 200. The positioning component 12 is in contact with the two opposite sides of the electrode assembly 200, and is not easy to interfere with the hot pressing and cutting module 20, which is beneficial for the hot pressing and cutting module 20 to heat seal and cut the electrode assembly 200.

[0072] According to some embodiments of the present application, the positioning assembly 12 includes a plurality of resisting members 120 , and the plurality of resisting members 120 cooperate together to resist the other three side surfaces of the electrode assembly 200 except the side to be heat-sealed and cut.

[0073] The abutment member 120 provides abutment for the side of the electrode assembly 200. The abutment member 120 can have a variety of structures. For example, when the abutment member 120 is a telescopic mechanism, such as the abutment member 120 is a cylinder or an electric push rod, the abutment or release of the side of the electrode assembly 200 can be achieved by using the telescopic function of the abutment member 120 itself. Of course, the abutment member 120 can also be a conventional stopper, which does not have a telescopic function itself, but the stopper can be movably arranged on the fixture module 10, which can also achieve the abutment function of the electrode assembly 200.

[0074] A plurality of abutting members 120 may be distributed on the fixture module 10 and located around the electrode assembly 200. The plurality of abutting members 120 cooperate with each other to position the electrode assembly 200. The number of abutting members 120 on each side of the electrode assembly 200 may be one or more, and the number of abutting members 120 may be determined according to actual conditions.

[0075] In this embodiment, a supporting member 120 is correspondingly disposed on the other three side surfaces of the electrode assembly 200 except the side to be heat-sealed and cut.

[0076] The electrode assembly 200 is supported by multiple supporting members 120 on the other three sides except the side to be heat-sealed and cut. In this way, except the side to be heat-sealed and cut, the other three sides of the electrode assembly 200 have supporting members 120 to realize the supporting and limiting function, which has a better positioning effect on the electrode assembly 200 and makes it less likely for the electrode assembly 200 to move.

[0077] According to some embodiments of this application, please combine Figure 1 , Figure 2 and Figure 3 The fixture module 10 further includes a carrying platform 11 , and at least one of the plurality of resisting members 120 is movably disposed on the carrying platform 11 for adjusting the size of the area enclosed by the plurality of resisting members 120 .

[0078] There are many ways to move the abutment 120 on the support platform 11. For example, a connection hole 1231 may be provided at a position on the support platform 11 corresponding to the abutment 120, and an adjustment hole 1211 may be provided on the abutment 120. The adjustment hole 1211 is a long strip hole, and the abutment 120 may move along the length direction of the adjustment hole 1211 to adjust the position of the abutment 120 on the support platform 11. After the position of the abutment 120 is determined, the adjustment hole 1211 is penetrated by a locking member and then locked and fixed with the connection hole 1231, so that the abutment 120 can be fixed after the position adjustment. The locking member may be a locking screw.

[0079] Of course, a retractable screw may be provided on the supporting member 120, and the screw may be threadedly matched with the supporting member 120, and the screw may be retracted and retracted by rotating the screw. A flexible contact portion that contacts the electrode assembly 200 may be provided at the far end of the screw, and the screw contacts the electrode assembly 200 through the contact portion.

[0080] By movably arranging the abutting members 120 on the supporting platform 11 , the size of the area enclosed by the plurality of abutting members 120 can be adjusted, thereby being able to adapt to the positioning requirements of electrode assemblies 200 of different models, and the applicable scope of the fixture module 10 is wider.

[0081] According to some embodiments of this application, please refer to Figure 3 The retaining member 120 includes a first retaining member 121, which is used to retain a first side of the electrode assembly 200 having a pole ear and a second side of the electrode assembly 200 that is arranged opposite to the pole ear; the first retaining member 121 is movably arranged on the supporting platform 11 along a first direction X and a second direction Y, the first direction X is the length direction of the electrode assembly 200, and the second direction Y is the width direction of the electrode assembly 200.

[0082] There are two first abutting members 121, and the two first abutting members 121 are respectively located on the first side of the electrode assembly 200 with the pole ear and the second side of the electrode assembly 200 opposite to the pole ear. In order to achieve the position adjustment of the first abutting member 121 in the second direction Y, a first slide rail 123 may be provided on the support platform 11, and the first slide rail 123 is extended along the second direction Y, and the first abutting member 121 slides on the first slide rail 123. A plurality of connecting holes 1231 are arranged at intervals along the second direction Y on the first slide rail 123, and the adjusting holes 1211 on the first abutting member 121 are extended along the first direction X. The first abutting member 121 can be selectively connected and fixed with one of the connecting holes 1231 after passing through the adjusting holes 1211 through the locking member, thereby achieving the position adjustment of the first abutting member 121 in both the first direction X and the second direction Y. The number of the adjusting holes 1211 on the first abutting member 121 can be one or more. When there are multiple adjustment holes 1211 , the multiple adjustment holes 1211 are distributed along the second direction Y at intervals.

[0083] Of course, the abutment 120 also includes a second abutment 122, which is used to limit the opposite side of the electrode assembly 200 to be hot-pressed and cut. The second abutment 122 can also be provided with a long strip hole, which is penetrated by a locking screw to achieve position adjustment of the second abutment 122.

[0084] Since one side of the electrode assembly 200 has a protruding pole ear, the first holding member 121 can be movably arranged on the supporting platform 11 in the first direction X and the second direction Y, that is, the first holding member 121 can be positionally adjustable in two directions. When the first holding member 121 is positionally adjusted in the second direction Y, the first holding member 121 can be staggered with the pole ear of the electrode assembly 200, thereby reducing the risk of interference between the first holding member 121 and the pole ear on the electrode assembly 200. Then, the position of the first holding member 121 in the first direction X is adjusted so that the first holding member 121 can contact the corresponding side of the electrode assembly 200, thereby realizing the positioning function of the electrode assembly 200.

[0085] According to some embodiments of this application, please refer to Figure 4 The fixture module 10 further includes a cover plate 13 , which is flippably disposed on the carrier platform 11 , and is used to cover a side of the electrode assembly 200 away from the positioning surface 111 .

[0086] The cover plate 13 is flippably arranged on the carrier 11, which means that the cover plate 13 can be rotatably installed on the carrier 11 through a hinge, and the extension direction of the hinge can be horizontal. The cover plate 13 has an open state and a closed state relative to the carrier 11. When the electrode assembly 200 to be hot-pressed and cut on the positioning surface 111 needs to be hot-pressed and cut, the cover plate 13 is flipped downward, and the cover plate 13 is switched from the open state to the closed state. The cover plate 13 is covered on one side of the top of the electrode assembly 200 to limit the electrode assembly 200. After completing the heat sealing and cutting of the isolation film 201 on the electrode assembly 200, the cover plate 13 is flipped upward, and the cover plate 13 is switched to the open state, and the electrode assembly 200 can be taken out.

[0087] The support platform 11 is provided with a support column for supporting the cover plate 13. When the cover plate 13 is in a closed state, the cover plate 13 contacts the support column or the height of the electrode assembly 200 is higher than the support column, there is a certain gap between the support column and the cover plate 13. The cover plate 13 and the support column are magnetically matched, and the magnetic force can press the cover plate 13 onto the electrode assembly 200 to achieve a covering effect on the electrode assembly 200.

[0088] In order to further improve the positioning effect of the electrode assembly 200, the cover plate 13 can be set to cover the side of the electrode assembly 200 away from the positioning surface 111, thereby achieving clamping positioning of the electrode assembly 200 in the thickness direction, and the positioning effect of the electrode assembly 200 is better.

[0089] According to some embodiments of this application, please refer to Figure 4The hot pressing and cutting module 20 includes a stand 21, a hot pressing head 22 and a first driving member 23; the first driving member 23 is arranged on the stand 21, and the first driving member 23 is used to drive the hot pressing head 22 to move along a third direction Z so that the hot pressing head 22 approaches or moves away from the positioning assembly 12, and the third direction Z is perpendicular to the positioning surface 111.

[0090] The stand 21 is a frame structure that provides a bearing function for the hot pressing and cutting module 20. The stand 21 may be installed on the bearing platform 11 or not. In this embodiment, the stand 21 is installed on the bearing platform 11 and is located above the positioning surface 111.

[0091] The frame 21 is a gate-shaped frame structure, including multiple columns 211 and a mounting plate 212 . The multiple columns 211 are extended in the vertical direction, the lower ends of the columns 211 are connected to the support platform 11 , and the mounting plate 212 is fixedly connected to the upper ends of the multiple columns 211 .

[0092] The first driving member 23 refers to a driving component capable of driving the hot pressing head 22 to move. The first driving member 23 can be a variety of driving mechanisms, for example, the first driving member 23 can be a cylinder, a hydraulic cylinder, an electric push rod, a screw nut pair or a linear module, etc. Optionally, the first driving member 23 is a cylinder.

[0093] The third direction Z is perpendicular to the direction of the positioning surface 111 . When the positioning surface 111 is a horizontal plane, the third direction Z can also be understood as a vertical direction.

[0094] The hot pressing head 22 refers to a hot pressing component that can provide hot pressing function. The hot pressing head 22 is a prior art, and heat-seals the isolation film 201 of the electrode assembly 200 by heating. The hot pressing head 22 can feedback the temperature of the hot pressing end surface through a thermocouple, and a suitable current is added to the hot pressing head 22 to obtain a suitable temperature. The heat is conducted to the workpieces to be joined, such as the isolation film 201, through the bottom of the hot pressing head 22, and finally the welded parts are heat-sealed or welded together.

[0095] Under the action of the first driving member 23, the hot pressing head 22 can be moved along the third direction Z, that is, the first driving member 23 can realize the approach or distance between the hot pressing head 22 and the electrode assembly 200 on the positioning surface 111. In this way, the electrode assembly 200 does not need to adjust the position after the positioning is completed. It only needs to drive the hot pressing head 22 to move through the first driving member 23 to achieve heat sealing of the isolation membrane 201 on one side of the electrode assembly 200.

[0096] According to some embodiments of this application, please refer to Figures 1 to 4The hot pressing and cutting module 20 also includes a first lifting frame 24 and a first guide portion 25. The first lifting frame 24 is connected to the first driving member 23, and the first lifting frame 24 is used for installing the hot pressing head 22; the first guide portion 25 is arranged between the first lifting frame 24 and the vertical frame 21, and the first guide portion 25 is used to guide the first lifting frame 24 to move along the third direction Z relative to the vertical frame 21.

[0097] The first lifting frame 24 is a frame structure, and a cylinder joint may be correspondingly arranged on the first lifting frame 24. The driving end of the first driving member 23 is connected to the cylinder joint, so that the first lifting frame 24 can be driven to move up and down along the third direction Z relative to the vertical frame 21, thereby realizing the function of the hot pressing head 22 approaching or moving away from the fixture module 10.

[0098] The first guide portion 25 is a guide component that guides the first lifting frame 24 during the movement process along the third direction Z. For example, the first guide portion 25 may include a first guide rod, and the number of the first guide rods may be one or two. In this embodiment, the number of the first guide rods is two, and the two first guide rods are respectively located on opposite sides of the first driving member 23. The first guide portion 25 is arranged on the stand 21, and the first lifting frame 24 is correspondingly provided with a guide device for the first guide rod to pass through. The guide device may be a guide sleeve or a guide hole. The first guide rod passes through the guide device of the first lifting frame 24. The guide device guides and limits the first guide rod, and guides the first lifting frame 24 to move only in the third direction Z.

[0099] The first guide portion 25 is provided so that, under the action of the first driving member 23, the first guide portion 25 can guide the first lifting frame 24, so that the first lifting frame 24 can be accurately and smoothly lifted along the third direction Z, thereby realizing the function of accurately heat-sealing the isolation membrane 201 on one side of the electrode assembly 200.

[0100] According to some embodiments of the present application, the hot pressing cutting module 20 also includes a cutter 26 and a second driving member 27; the second driving member 27 is arranged on the stand 21, and the second driving member 27 is used to drive the cutter 26 to move along the third direction Z to make the cutter 26 approach or move away from the positioning assembly 12.

[0101] The second driving member 27 refers to a driving component capable of driving the cutter 26 to move. The second driving member 27 can be a variety of driving mechanisms. For example, the second driving member 27 can be a cylinder, a hydraulic cylinder, an electric push rod, a screw nut pair or a linear module.

[0102] Optionally, the second driving member 27 has the same structure as the first driving member 23 , and the second driving member 27 is also a cylinder.

[0103] The cutter 26 refers to a cutting tool that can provide a cutting function for the isolation film 201 . The cutter 26 can be purchased directly, and will not be described in detail here.

[0104] Under the action of the second driving member 27, the cutter 26 can be moved along the third direction Z, that is, the second driving member 27 can be used to move the cutter 26 closer to or farther away from the electrode assembly 200 on the positioning surface 111. In this way, the electrode assembly 200 does not need to adjust its position after positioning is completed. It only needs to drive the cutter 26 to move through the second driving member 27 to achieve the cutting action of the isolation membrane 201 on one side of the electrode assembly 200.

[0105] According to some embodiments of the present application, the hot pressing and cutting module 20 also includes a second lifting frame 28 and a second guide portion 29, the second lifting frame 28 is connected to the second driving member 27, and the second lifting frame 28 is used for installing the cutter 26; the second guide portion 29 is arranged between the second lifting frame 28 and the vertical frame 21, and the second guide portion 29 is used to guide the second lifting frame 28 to move along the third direction Z relative to the vertical frame 21.

[0106] The second lifting frame 28 is a frame structure, and a cylinder joint is correspondingly arranged on the second lifting frame 28. The second driving member 27 is connected to the cylinder joint, so as to drive the second lifting frame 28 to move up and down along the third direction Z, so as to realize that the cutter 26 is close to or away from the fixture module 10.

[0107] The second guide portion 29 is a guide component that guides the second lifting frame 28 in the process of moving along the third direction Z. For example, the second guide portion 29 may include a second guide rod. The number of the second guide rods may be two, and the two second guide rods are respectively located on both sides of the second driving member 27. The second guide portion 29 is arranged on the stand 21, and the second lifting frame 28 is correspondingly provided with a guide device for the second guide rod to pass through. The guide device may be a guide sleeve or a guide hole. The second guide rod passes through the guide device of the second lifting frame 28. The guide device guides and limits the second guide rod, and guides the second lifting frame 28 to move only in the third direction Z.

[0108] The second guide portion 29 is provided so that, under the action of the second driving member 27, the second guide portion 29 can guide the second lifting frame 28, so that the second lifting frame 28 can be accurately and smoothly lifted along the third direction Z, ensuring the accurate cutting of the isolation membrane 201 on one side of the electrode assembly 200.

[0109] According to some embodiments of this application, please refer to Figure 6 The hot pressing head 22 has an avoidance hole 221 for the cutter 26 to pass through. The cutter 26 is used to cut off the excess isolation film 201 on one side of the electrode assembly 200 after passing through the avoidance hole 221.

[0110] The avoidance hole 221 refers to a hole that runs through the thickness direction of the hot pressing head 22. The avoidance hole 221 extends along the width direction of the electrode assembly 200. The length of the avoidance hole 221 should be greater than the length of the isolation film 201, so that the cutter 26 can cut the isolation film 201 after passing through the avoidance hole 221. The width of the avoidance hole 221 is greater than the width of the cutter 26.

[0111] The product (electrode assembly) to be heat-sealed and cut is placed on the fixture module 10 → the first driving member 23 receives a signal and moves downward → the second driving member 27 moves downward → after the cutter 26 cuts, the second driving member 27 drives the cutter 26 to reset upward → the heat sealing action is completed → the first driving member 23 receives a signal and moves upward → the heat sealing + cutting action is completed → the material collection cycle enters the next cycle.

[0112] Since heat sealing takes a longer time than cutting, an avoidance hole 221 for the cutter 26 to pass through is provided on the heat pressing head 22. In this way, during the heat sealing of the isolation film 201 by the heat pressing head 22, the cutter 26 can pass through the avoidance hole 221 on the heat pressing head 22 under the action of the second driving member 27 to cut the excess isolation film 201 on one side of the electrode assembly 200. That is, the heat sealing and cutting of the isolation film 201 on the electrode assembly 200 can be carried out simultaneously without adjusting the position of the electrode assembly 200 or repositioning, which greatly improves the efficiency of heat sealing and cutting of the isolation film 201 on one side of the electrode assembly 200 and shortens the processing time.

[0113] According to some embodiments of this application, please refer to Figure 4 and Figure 5 The hot pressing and cutting module 20 also includes a position adjustment component 30, which is arranged between the second lifting frame 28 and the cutter 26. The position adjustment component 30 is used to adjust the position of the cutter 26 in the second direction Y. The second direction Y is the width direction of the electrode assembly 200, and the second direction Y is perpendicular to the third direction Z.

[0114] The position adjustment component 30 can be of various structures, for example, the position adjustment component 30 can be a cylinder, a hydraulic cylinder, a linear module, a screw nut pair mechanism, or an adjustment screw 32 mechanism, etc. The specific structure of the position adjustment component 30 can be determined according to actual conditions.

[0115] By providing a position adjustment component 30 on the second lifting frame 28 and the cutter 26, the position adjustment component 30 can adjust the position of the cutter 26 in the second direction Y, and can fine-tune the position of the cutter 26 according to the actual cutting needs of the isolation film 201, so as to have a wider application range.

[0116] According to some embodiments of this application, please refer to Figure 5The position adjustment assembly 30 includes a mounting seat 31, an adjusting screw 32, a tool holder 33 and a third guide portion 34. The mounting seat 31 is arranged on the second lifting frame 28; the adjusting screw 32 is extended along the second direction Y, and the adjusting screw 32 is rotatably mounted on the mounting seat 31; the tool holder 33 is used for mounting the cutter 26, and the tool holder 33 and the adjusting screw 32 are threadedly matched; the third guide portion 34 is extended along the second direction Y on the second lifting frame 28, and the tool holder 33 and the third guide portion 34 are slidably matched.

[0117] The adjusting screw 32 refers to a screw structure with an external thread structure on the rod, and the tool holder 33 refers to a frame for mounting the cutter 26. The cutter 26 and the tool holder 33 are detachably connected. There are many ways to mount the cutter 26. For example, the cutter 26 can be directly fastened to the tool holder 33 by screws, or the cutter 26 can be clamped and fixed to the tool holder 33 by clamping with a splint.

[0118] The third guide portion 34 refers to a guide component that provides guidance for the tool holder 33 . The third guide portion 34 may be a guide component such as a guide rod or a slide rail.

[0119] The adjusting screw 32 is rotatably mounted on the second lifting frame 28 through the mounting seat 31, and the tool holder 33 can be used for mounting the cutter 26. The tool holder 33 and the adjusting screw 32 are threadedly matched. By rotating the adjusting screw 32, under the guiding action of the third guide portion 34 on the tool holder 33, the tool holder 33 can be prevented from rotating with the adjusting screw 32, thereby driving the tool holder 33 to adjust its position in the second direction Y along the third guide portion 34. By controlling the rotation amount of the adjusting screw 32, the position adjustment amount of the tool holder 33 in the second direction Y can be accurately controlled. The adjustment is convenient and quick, the operation is simple, and the adjustment accuracy is high.

[0120] According to some embodiments of this application, please refer to Figure 7 and Figure 8 The hot pressing and cutting device 100 further includes a frame 40 , which is used to carry the fixture module 10 and the hot pressing and cutting module 20 ; a moving wheel 50 is disposed at the bottom of the frame 40 .

[0121] The frame 40 refers to a frame structure that provides a bearing function for the fixture module 10 and the hot pressing and cutting module 20. The moving wheel 50 is a walking wheel that can provide a moving function for the frame 40, and can be a universal wheel, and the universal wheel can have a brake locking function.

[0122] The frame 40 can be used to install the jig module 10 and the hot pressing and cutting module 20, providing a bearing function for the jig module 10 and the hot pressing and cutting module 20. By arranging movable wheels 50 at the bottom of the frame 40, the hot pressing and cutting device can be transferred as needed, with strong flexibility.

[0123] The embodiment of the present application further provides a battery manufacturing device, which includes the hot pressing and cutting device 100 of any of the aforementioned embodiments.

[0124] In some embodiments, please refer to Figures 1 to 8 The hot pressing and cutting device 100 is used to heat-seal and cut the isolation film 201 on one side of the electrode assembly 200. The hot pressing and cutting device 100 includes a jig module 10 and a hot pressing and cutting module 20. The jig module 10 has a positioning surface 111, and the positioning surface 111 is used to carry the electrode assembly 200. The jig module 10 includes a positioning component 12, and the positioning component 12 is used to position the electrode assembly 200 on the positioning surface 111; the hot pressing and cutting module 20 cooperates with the jig module 10 to heat-seal the isolation film 201 on one side of the electrode assembly 200 and cut the excess isolation film 201 on the electrode assembly 200. The positioning component 12 includes a plurality of abutting members 120, and the plurality of abutting members 120 cooperate together to abut the other three sides of the electrode assembly 200 except the side to be heat-sealed and cut.

[0125] The electrode assembly 200 to be heat-sealed and cut is carried and positioned by the jig module 10, and the positioning assembly 12 cooperates with the electrode assembly 200, so as to fix the electrode assembly 200 on the positioning surface 111, and keep the position of the electrode assembly 200 on the positioning surface 111 unchanged, thereby improving the accuracy of heat-sealing and cutting the isolation film 201 on one side of the electrode assembly 200 by the hot pressing and cutting module 20. Then, the hot pressing and cutting module 20 cooperates with the jig module 10 to heat-seal and combine the multi-layer isolation film 201 to be heat-sealed on one side of the electrode assembly 200, and simultaneously cut the excess isolation film 201 on the electrode assembly 200, that is, the hot pressing and cutting module 20 can realize the two-step process of heat-sealing and cutting the isolation film 201 on the electrode assembly 200 at one time, compared with the prior art in which heat-sealing and cutting are performed independently in steps, the processing flow is shortened, multiple repeated feeding actions are reduced, and production efficiency is improved. The electrode assembly 200 is supported by multiple supporting members 120 on the other three sides except the side to be heat-sealed and cut. In this way, except the side to be heat-sealed and cut, the other three sides of the electrode assembly 200 have supporting members 120 to realize the supporting and limiting function, which has a better positioning effect on the electrode assembly 200 and makes it less likely for the electrode assembly 200 to move.

[0126] In some embodiments, the jig module 10 further includes a carrier platform 11, and at least one of the plurality of abutting members 120 is movably disposed on the carrier platform 11, so as to adjust the size of the area enclosed by the plurality of abutting members 120. The abutting members 120 include a first abutting member 121, and the first abutting member 121 is used to abut the first side of the electrode assembly 200 having the pole ear and the second side of the electrode assembly 200 disposed opposite to the pole ear; the first abutting member 121 is movably disposed on the carrier platform 11 along a first direction X and a second direction Y, the first direction X being the length direction of the electrode assembly 200, and the second direction Y being the width direction of the electrode assembly 200. The jig module 10 further includes a cover plate 13, and the cover plate 13 is flippably disposed on the carrier platform 11, and the cover plate 13 is used to cover the side of the electrode assembly 200 away from the positioning surface 111.

[0127] By movably setting the abutment 120 on the carrier 11, the size of the area enclosed by the multiple abutment 120 can be adjusted, so that it can adapt to the positioning requirements of different types of electrode assemblies 200, and the application range of the fixture module 10 is wider. The first abutment 121 can be movably set on the carrier 11 in the first direction X and the second direction Y, that is, the first abutment 121 can be adjusted in position in two directions, so that the first abutment 121 can be adjusted in position in the second direction Y, and the first abutment 121 can be staggered with the pole ear of the electrode assembly 200, reducing the risk of interference between the first abutment 121 and the pole ear, and then adjust the position of the first abutment 121 in the first direction X, so that the first abutment 121 can contact the corresponding side of the electrode assembly 200, and realize the limiting function of the electrode assembly 200. By disposing the cover plate 13 , the cover plate 13 can be covered on the side of the electrode assembly 200 away from the positioning surface 111 , thereby achieving clamping and positioning of the electrode assembly 200 in the thickness direction, and the positioning effect of the electrode assembly 200 is better.

[0128] In some embodiments, the hot pressing and cutting module 20 includes a stand 21, a hot pressing head 22 and a first driving member 23; the first driving member 23 is disposed on the stand 21, and the first driving member 23 is used to drive the hot pressing head 22 to move along the third direction Z so that the hot pressing head 22 is close to or away from the positioning assembly 12, and the third direction Z is perpendicular to the positioning surface 111. The hot pressing and cutting module 20 also includes a first lifting frame 24 and a first guide 25, the first lifting frame 24 is connected to the first driving member 23, and the first lifting frame 24 is used for installing the hot pressing head 22; the first guide 25 is disposed between the first lifting frame 24 and the stand 21, and the first guide 25 is used to guide the first lifting frame 24 to move relative to the stand 21 along the third direction Z. The hot pressing and cutting module 20 also includes a cutter 26 and a second driving member 27; the second driving member 27 is disposed on the stand 21, and the second driving member 27 is used to drive the cutter 26 to move along the third direction Z so that the cutter 26 is close to or away from the positioning assembly 12. The hot pressing and cutting module 20 also includes a second lifting frame 28 and a second guide portion 29. The second lifting frame 28 is connected to the second driving member 27, and the second lifting frame 28 is used for installing the cutter 26. The second guide portion 29 is arranged between the second lifting frame 28 and the vertical frame 21, and the second guide portion 29 is used to guide the second lifting frame 28 to move along the third direction Z relative to the vertical frame 21.

[0129] Under the action of the first driving member 23, the hot pressing head 22 can move along the third direction Z, that is, the first driving member 23 can realize the approach or distance between the hot pressing head 22 and the electrode assembly 200 on the positioning surface 111, so that the electrode assembly 200 does not need to adjust the position after positioning, and only needs to drive the hot pressing head 22 to move through the first driving member 23 to achieve heat sealing of the isolation film 201 on one side of the electrode assembly 200. Under the action of the first driving member 23, the first guide part 25 can guide the first lifting frame 24, so that the first lifting frame 24 can be accurately and smoothly lifted and lowered along the third direction Z, and the isolation film 201 on one side of the electrode assembly 200 can be accurately and smoothly sealed. Under the action of the second driving member 27, the cutter 26 can move along the third direction Z, that is, the second driving member 27 can realize the closeness or distance between the cutter 26 and the electrode assembly 200 on the positioning surface 111, so that the electrode assembly 200 does not need to adjust the position after positioning, and only needs to drive the cutter 26 to move through the second driving member 27 to realize the cutting action of the isolation film 201 on one side of the electrode assembly 200. Under the action of the second driving member 27, the second guide part 29 can guide the second lifting frame 28, so that the second lifting frame 28 can be accurately and smoothly lifted and lowered along the third direction Z, ensuring the function of accurately cutting the isolation film 201 on one side of the electrode assembly 200.

[0130] In some embodiments, the hot pressing head 22 has an avoidance hole 221 for the cutter 26 to pass through, and the cutter 26 is used to cut the excess isolation film 201 on one side of the electrode assembly 200 after passing through the avoidance hole 221. The hot pressing and cutting module 20 also includes a position adjustment component 30, which is arranged between the second lifting frame 28 and the cutter 26, and the position adjustment component 30 is used to adjust the position of the cutter 26 in the second direction Y, the second direction Y is the width direction of the electrode assembly 200, and the second direction Y is perpendicular to the third direction Z. The position adjustment assembly 30 includes a mounting seat 31, an adjusting screw 32, a tool holder 33 and a third guide portion 34. The mounting seat 31 is arranged on the second lifting frame 28; the adjusting screw 32 is extended along the second direction Y, and the adjusting screw 32 is rotatably mounted on the mounting seat 31; the tool holder 33 is used for mounting the cutter 26, and the tool holder 33 and the adjusting screw 32 are threadedly matched; the third guide portion 34 is extended along the second direction Y on the second lifting frame 28, and the tool holder 33 and the third guide portion 34 are slidably matched.

[0131] By providing an avoidance hole 221 for the cutter 26 to pass through on the hot pressing head 22, during the process of the hot pressing head 22 heat-sealing the isolation film 201, the cutter 26 can pass through the avoidance hole 221 on the hot pressing head 22 under the action of the second driving member 27 to cut the excess isolation film 201, that is, the heat sealing and cutting of the isolation film 201 on the electrode assembly 200 can be performed simultaneously, without adjusting the position of the electrode assembly 200 and repositioning, which greatly improves the efficiency of heat sealing and cutting of the isolation film 201 and shortens the processing time. By providing a position adjustment component 30 on the second lifting frame 28 and the cutter 26, the position adjustment component 30 can adjust the position of the cutter 26 in the second direction Y, and can fine-tune the position of the cutter 26 according to the actual cutting needs of the isolation film 201, so as to have a wider range of applications. The adjusting screw 32 is rotatably mounted on the second lifting frame 28 through the mounting seat 31, and the tool holder 33 can be used for mounting the cutter 26. The tool holder 33 and the adjusting screw 32 are threadedly matched. By rotating the adjusting screw 32, under the guiding action of the third guide portion 34 on the tool holder 33, the tool holder 33 can be prevented from rotating with the adjusting screw 32, thereby driving the tool holder 33 to adjust its position in the second direction Y along the third guide portion 34. By controlling the rotation amount of the adjusting screw 32, the position adjustment amount of the tool holder 33 in the second direction Y can be accurately controlled. The adjustment is convenient and quick, the operation is simple, and the adjustment accuracy is high.

[0132] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. 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 hot pressing and cutting device for heat sealing and cutting the separator on one side of an electrode assembly, characterized in that: include: A fixture module has a positioning surface, the positioning surface is used to carry the electrode assembly, the fixture module includes a positioning component, the positioning component is used to position the electrode assembly on the positioning surface; A hot pressing and cutting module cooperates with the jig module to heat-seal the isolation film on one side of the electrode assembly and cut off excess isolation film on the electrode assembly.

2. The hot pressing cutting device according to claim 1, characterized in that: The positioning assembly is used to abut against at least two opposite sides of the electrode assembly to position the electrode assembly.

3. The hot pressing cutting device according to claim 2, characterized in that: The positioning assembly includes a plurality of abutting members, which cooperate with each other to abut the other three side surfaces of the electrode assembly except the side to be heat-sealed and cut.

4. The hot pressing cutting device according to claim 3, characterized in that: The fixture module also includes: The supporting platform is provided with at least one of the plurality of abutting members movably disposed on the supporting platform so as to adjust the size of the area enclosed by the plurality of abutting members.

5. The hot pressing cutting device according to claim 4, characterized in that: The abutment member includes a first abutment member, and the first abutment member is used to abut against a first side of the electrode assembly having a pole ear and a second side of the electrode assembly disposed opposite to the pole ear; The first supporting member is movably disposed on the supporting platform along a first direction and a second direction, wherein the first direction is a length direction of the electrode assembly, and the second direction is a width direction of the electrode assembly.

6. The hot pressing cutting device according to claim 4, characterized in that: The fixture module also includes: A cover plate is disposed on the supporting platform in a flippable manner, and is used to cover a side of the electrode assembly away from the positioning surface.

7. The hot pressing cutting device according to claim 1, characterized in that: The hot pressing and cutting module comprises: Stand; Thermal head; A first driving member is disposed on the stand, and is used to drive the hot pressing head to move along a third direction so that the hot pressing head approaches or moves away from the positioning assembly, and the third direction is perpendicular to the positioning surface.

8. The hot pressing cutting device according to claim 7, characterized in that: The hot pressing and cutting module also includes: A first lifting frame connected to the first driving member, wherein the first lifting frame is used for mounting the thermal pressing head; The first guide portion is disposed between the first lifting frame and the vertical frame, and the first guide portion is used to guide the first lifting frame to move along the third direction relative to the vertical frame.

9. The hot pressing cutting device according to claim 7, characterized in that: The hot pressing and cutting module also includes: Cutter; A second driving member is disposed on the stand, and is used for driving the cutter to move along the third direction so as to make the cutter approach or move away from the positioning assembly.

10. The hot pressing cutting device according to claim 9, characterized in that: The hot pressing and cutting module also includes: a second lifting frame connected to the second driving member, the second lifting frame being used for mounting the cutter; The second guide portion is disposed between the second lifting frame and the vertical frame, and the second guide portion is used to guide the second lifting frame to move along the third direction relative to the vertical frame.

11. The hot pressing cutting device according to claim 10, characterized in that: The hot pressing head is provided with an avoidance hole for the cutter to pass through, and the cutter is used to cut off the excess isolation film on one side of the electrode assembly after passing through the avoidance hole.

12. The hot pressing cutting device according to claim 11, characterized in that: The hot pressing and cutting module also includes: A position adjustment component is arranged between the second lifting frame and the cutter, and the position adjustment component is used to adjust the position of the cutter in a second direction, where the second direction is the width direction of the electrode assembly, and the second direction is perpendicular to the third direction.

13. The hot pressing cutting device according to claim 12, characterized in that: The position adjustment component comprises: A mounting seat, arranged on the second lifting frame; an adjusting screw extending along the second direction, wherein the adjusting screw is rotatably mounted on the mounting seat; A knife holder, used for mounting the cutter, wherein the knife holder and the adjusting screw are threadedly matched; The third guide portion is extended along the second direction and is disposed on the second lifting frame. The tool holder is slidably matched with the third guide portion.

14. The hot pressing cutting device according to claim 1, characterized in that: The hot pressing and cutting device also includes: A frame, the frame is used to carry the fixture module and the hot pressing and cutting module; and moving wheels are arranged at the bottom of the frame.

15. A battery manufacturing device, characterized in that: It comprises a hot pressing and cutting device according to any one of claims 1-14.

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