Processing device and battery production equipment
By using a processing device to perform heat sealing operation in the electrode assembly envelope packaging processing, the problem of inefficient production efficiency in the prior art is solved, and efficient electrode assembly packaging and independent molding are achieved.
Patent Information
- Application Number
- CN202421261414.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The prior art produces low production efficiency when performing the encapsulation of electrode assemblies, which affects the overall production efficiency of the battery.
A processing device is provided, by encapsulating at least two electrode assemblies and performing heat sealing operations using the accommodating gap between the first package and the second package, a bilateral heat sealing operation is realized to improve production efficiency by encapsulating at least two electrode assemblies and using the accommodating gap between the first package and the second package.
Bilateral heat sealing is achieved through a single heat sealing operation, which significantly improves production efficiency and facilitates subsequent cutting of the heat sealing area of the heat sealing film, so that the electrode assembly can be formed independently.
Smart Images
Figure CN222927506U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of batteries, and particularly to a processing device and a battery production equipment. Background Art
[0002] A battery cell is the smallest unit that makes up a battery, and as a component in the battery cell where actual electrochemical reactions occur, the electrode assembly has an important impact on the overall performance of the battery cell. After the electrode assembly is manufactured, isostatic pressing treatment needs to be performed to achieve high density. Therefore, before the isostatic pressing treatment, the electrode assembly needs to be encapsulated with a film.
[0003] However, currently, during the process of encapsulating the electrode assembly with a film, the production efficiency is low, affecting the overall production efficiency of the battery. Summary of the Utility Model
[0004] Based on this, it is necessary to provide a processing device and a battery production equipment to address the problem of low production efficiency during the current process of encapsulating the electrode assembly with a film.
[0005] In a first aspect, the present application provides a processing device for encapsulating at least two electrode assemblies, wherein a packaging film is connected between adjacent two electrode assemblies; the processing device includes a first packaging member and a second packaging member that are spaced apart along a first direction, and a receiving gap for accommodating the packaging film is formed between the two, and at least one of the first packaging member and the second packaging member is movably arranged along the first direction to perform a heat sealing operation on the packaging film in the receiving gap.
[0006] With the above structure, when at least two electrode assemblies are continuously encapsulated, a packaging film is connected between each adjacent two electrode assemblies. The electrode assemblies are conveyed into the receiving gap. When the packaging film between adjacent two electrode assemblies moves into the receiving gap and corresponds to the positions of the first packaging member and the second packaging member, the first packaging member and the second packaging member can heat-seal the packaging film, thereby achieving double-sided heat sealing through one heat sealing operation and effectively improving the production efficiency.
[0007] In some embodiments, both the first packaging member and the second packaging member include a sealing head, and the sealing head has a heat-sealing surface facing the packaging film. In a second direction, the width of the heat-sealing surface is equal to the width of the sealing head, and the heat-sealing surface is used to contact the packaging film surface to perform the heat sealing operation; wherein, the second direction is arranged along the arrangement direction of each electrode assembly and intersects with the first direction.
[0008] With the above structure, the heat-sealing surface contacts the packaging film surface to perform the heat sealing operation, making the width of the heat-sealed area on the packaging film larger. On the one hand, it can achieve the effect of double-sided heat sealing in one heat sealing, improving the heat sealing efficiency; on the other hand, it is also convenient for subsequent cutting of the heat-sealed area of the heat-sealed film.
[0009] In some embodiments, the first package and the second package both include a first main body and a first heat sealing portion and a second heat sealing portion spaced apart along a second direction on the first main body, the first heat sealing portion and the second heat sealing portion both being disposed toward the packaging film and being used to contact the packaging film to perform a heat sealing operation; wherein the second direction is disposed along the arrangement direction of each electrode assembly and intersects with the first direction.
[0010] By providing the first heat sealing part and the second heat sealing part, the contact area and the heat generating area with the packaging film can be reduced, the heat generation can be reduced, the flatness requirement can be lowered during the contact with the packaging film surface, and the heat sealing effect can be effectively improved.
[0011] In some embodiments, the processing device further includes a first driving member drivingly connected to the first package and / or the second package, and the first driving member is used to drive the first package and / or the second package to move along the first direction.
[0012] By providing the first driving member, the first packaging member and / or the second packaging member can be smoothly driven to move along the first direction, so that the first packaging member and the second packaging member can move closer to or farther from each other in the first direction, thereby achieving smooth heat sealing of the packaging film.
[0013] In some embodiments, the processing device further includes a first follower drivingly connected to the first packaging component and the second packaging component, and the first follower is used to drive the first packaging component and the second packaging component to move synchronously along the second direction following the packaging film during the heat sealing process.
[0014] Thus, the first follower drives the first package and the second package to move synchronously along the second direction following the packaging film, so that the first package and the second package remain relatively still with the packaging film, achieving non-stop heat sealing and improving production efficiency.
[0015] In some embodiments, the processing device also includes a cutting component arranged downstream of the first package and the second package along a second direction, the cutting component is movably arranged along the first direction and is used to cut off the packaging film after heat sealing; wherein the second direction is arranged along the arrangement direction of each electrode assembly and intersects with the first direction.
[0016] The above structure enables cutting after heat sealing, so that each electrode assembly can be independently formed, which is convenient for isostatic pressing.
[0017] In some embodiments, the cutting assembly includes a first cutter and a second cutter spaced apart along a first direction, with a cutting gap formed therebetween for accommodating the heat-sealed packaging film, and at least one of the first cutter and the second cutter is movably disposed along the first direction.
[0018] Through the above structure, the packaging film can be cut in the cutting gap after heat sealing is completed, and cut in the heat sealing area of the packaging film, so that each electrode assembly can be independently formed for subsequent isostatic pressing treatment.
[0019] In some embodiments, the first cutting knife and the second cutting knife each include a second body and a first blade and a second blade disposed on the second body at intervals along a second direction, and the first blade and the second blade are disposed toward the packaging film.
[0020] Through the above structure, on the one hand, the effect of cutting both sides at one time can be achieved, thereby improving efficiency. On the other hand, the design of the double-edged structure can effectively alleviate the flanging problem during the cutting process.
[0021] In some embodiments, the processing device further comprises a second driving member drivingly connected to the first cutter and / or the second cutter, and the second driving member is used to drive the first cutter and / or the second cutter to move along the first direction.
[0022] By providing the second driving member, the first cutter and / or the second cutter can be smoothly driven to move along the first direction, so that the first cutter and the second cutter can move closer to or farther from each other in the first direction, thereby achieving smooth cutting of the packaging film.
[0023] In some embodiments, the processing device further comprises a second follower drivingly connected to the cutting assembly, and the second follower is used to drive the cutting assembly to move synchronously along the second direction with the packaging film during the cutting process.
[0024] Thus, the first cutter and the second cutter are driven by the second follower to move synchronously along the second direction following the packaging film, so that the first cutter and the second cutter and the packaging film remain relatively still, achieving non-stop cutting and improving production efficiency.
[0025] In a second aspect, the present application also provides a battery production device, including the processing device as described above, which is used to heat seal and cut at least two electrode assemblies.
[0026] In the above-mentioned processing device and battery production equipment, when at least two electrode assemblies are continuously packaged, a packaging film is connected between each two adjacent electrode assemblies, and each electrode assembly is conveyed to the accommodating gap. When the packaging film between the two adjacent electrode assemblies moves into the accommodating gap and corresponds to the position of the first packaging component and the second packaging component, the first packaging component and the second packaging component can heat-seal the packaging film, thereby realizing bilateral heat sealing through a single heat sealing operation, effectively improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 Schematic diagram of the structure of a processing device according to one or more embodiments.
[0028] Figure 2 Structural schematic diagram of a processing device according to one or more embodiments.
[0029] Explanation of reference numerals: 100, processing device; 200, electrode assembly; 300, encapsulation film; 10, first encapsulation member; 20, second encapsulation member; 30, accommodation gap; 40, cutting assembly; 11, sealing head; 12, heat-sealing surface; 13, first main body; 14, first heat-sealing portion; 15, second heat-sealing portion; 41, first cutter; 42, second cutter; 43, cutting gap; 44, second main body; 45, first cutting edge; 46, second cutting edge; a, first direction; b, second direction. Detailed implementation manners
[0030] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0031] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.
[0032] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0033] In this application, unless otherwise clearly specified or limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0034] In this application, unless otherwise clearly specified or limited, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0035] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.
[0036] Currently, from the perspective of the development of the market situation, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars and other fields. With the continuous expansion of the application fields of power batteries, the market demand is also continuously increasing.
[0037] A battery cell is the smallest unit that makes up a battery. In the structure of a battery cell, it usually includes a housing and an electrode assembly accommodated in the housing. The electrode assembly is the component in the battery cell where the actual electrochemical reaction occurs, and the housing wraps around the outer periphery of the electrode assembly, capable of forming a sealed environment to protect the electrode assembly.
[0038] After the electrode assembly is fabricated, isostatic pressing treatment needs to be performed on it to achieve high density. Therefore, in order to isolate the electrode assembly from the liquid or gas during the isostatic pressing process, the electrode assembly needs to be encapsulated before the isostatic pressing treatment.
[0039] Current encapsulation devices are mostly applied to the aluminum-plastic film packaging process of soft-pack battery cells. That is to say, during the encapsulation process, a series of processes such as shell punching, cutting, shell insertion, heat sealing, and vacuum pumping need to be carried out in sequence.
[0040] However, the above-mentioned aluminum-plastic film packaging process of soft-pack battery cells has a step-by-step production process. The reason for such operation is that the aluminum-plastic film needs to be divided into upper and lower parts, and the upper and lower parts of the aluminum-plastic film are respectively punched to form half grooves, and then the upper and lower parts of the aluminum-plastic film are covered, and the two half grooves enclose to form a complete receiving groove to place the electrode assembly in the receiving groove. Therefore, in the aluminum-plastic film packaging process of soft-pack battery cells, the aluminum-plastic film needs to be cut first, and then the shell is punched by a stamping method.
[0041] In this way, when applying the above-mentioned aluminum-plastic film packaging process of soft-pack battery cells to the encapsulation before the isostatic pressing treatment of the electrode assembly, the process efficiency of the encapsulation of the electrode assembly is low, thus affecting the overall production efficiency of the battery.
[0042] Based on the above considerations, in order to solve the problem of low production efficiency in the process of encapsulating the electrode assembly at present, one or more embodiments of the present application provide a processing device. When at least two electrode assemblies are continuously encapsulated, an encapsulation film is connected between every two adjacent electrode assemblies, and each electrode assembly is transported to the accommodation gap. When the encapsulation film between two adjacent electrode assemblies moves to the accommodation gap and corresponds to the positions of the first encapsulation member and the second encapsulation member, the first encapsulation member and the second encapsulation member can perform heat sealing on the encapsulation film, so as to achieve double-sided heat sealing through one heat sealing operation, effectively improving the production efficiency.
[0043] Referring to Figure 1 , an embodiment of the present application provides a processing device 100 for encapsulating at least two electrode assemblies 200, wherein an encapsulation film 300 is connected between two adjacent electrode assemblies 200. The processing device 100 includes a first encapsulation member 10 and a second encapsulation member 20 that are spaced apart along a first direction a, and an accommodation gap 30 for accommodating the encapsulation film 300 is formed between the two. At least one of the first encapsulation member 10 and the second encapsulation member 20 is movably arranged along the first direction a to perform a heat sealing operation on the encapsulation film 300 in the accommodation gap 30.
[0044] It should be noted that after the electrode assembly 200 is manufactured, isostatic pressing treatment needs to be carried out to achieve high density. Specifically, for isostatic pressing treatment, the electrode assembly 200 needs to be placed in a closed container, and a liquid or gas medium is used to uniformly transmit pressure to the electrode assembly 200 in all directions. Therefore, before isostatic pressing treatment, the electrode assembly 200 needs to be encapsulated with a film. After the electrode assembly 200 finishes isostatic pressing treatment, the film material coated on the outer periphery of the electrode assembly 200 can be removed, and then the electrode assembly 200 can be placed in a shell to assemble a battery cell.
[0045] Among them, the film material coated on the outer periphery of the electrode assembly 200 usually uses an aluminum-plastic film, and the encapsulation process of the electrode assembly 200 currently mostly refers to the aluminum-plastic film packaging process of a soft-pack battery cell. However, the aluminum-plastic film packaging process needs to first punch and cut the aluminum-plastic film, and divide the aluminum-plastic film into upper and lower parts. The upper and lower parts are respectively punched to form two half-grooves. When the electrode assembly 200 is placed in the aluminum-plastic film, the two half-grooves enclose each other to form a complete groove structure, which can wrap the electrode assembly 200 to complete the film packaging process of the soft-pack battery cell.
[0046] However, the above-mentioned aluminum-plastic film packaging process of the soft-pack battery cell needs to punch the upper and lower parts of the cut aluminum-plastic film one by one, and then assemble them one by one to form a soft-pack battery cell. When the above-mentioned aluminum-plastic film packaging process of the soft-pack battery cell is applied to the encapsulation process before the isostatic pressing treatment of the electrode assembly 200, its production efficiency is low, which is not conducive to improving the overall production efficiency of the battery.
[0047] Based on this, the present application provides a processing device 100. When encapsulating the electrode assembly 200 with a film, first, the film material can be continuously coated on the outer peripheries of at least two electrode assemblies 200, and the electrode assemblies 200 are sequentially arranged at intervals along the longitudinal extension direction of the film material, and an encapsulation film 300 is connected between every two adjacent electrode assemblies 200. That is to say, when the electrode assembly 200 is coated with an aluminum-plastic film, the encapsulation film 300 connected between every two adjacent electrode assemblies 200 is the aluminum-plastic film.
[0048] Specifically, when coating the aluminum-plastic film, the aluminum-plastic film is divided into upper and lower layers. First, the electrode assemblies 200 are arranged at intervals on the lower-layer aluminum-plastic film, and then the upper-layer aluminum-plastic film is covered on the electrode assemblies 200, so as to wrap the electrode assemblies 200 jointly by the upper and lower layers of aluminum-plastic film.
[0049] However, after the wrapping, the upper and lower layers of the aluminum-plastic film are not connected and sealed, that is, there is a gap between the upper and lower layers of the aluminum-plastic film. Therefore, after wrapping the aluminum-plastic film, the upper and lower layers of the aluminum-plastic film are sealed by the processing device 100 of the present application, so that the upper and lower layers of the aluminum-plastic film can be more stably wrapped around the outer periphery of each electrode assembly 200.
[0050] The first sealing member 10 and the second sealing member 20 refer to structures that can perform a heat-sealing operation between the upper and lower layers of the packaging film 300 outside the electrode assembly 200 to tightly connect the upper and lower layers of the packaging film 300.
[0051] When processing the electrode assembly 200, each electrode assembly 200 can be driven to move uniformly in the horizontal direction by a conveying structure. The first direction a is set as the vertical direction perpendicular to the horizontal direction. The first sealing member 10 and the second sealing member 20 are arranged at intervals in the vertical direction, and a receiving gap 30 is formed between them. Each electrode assembly 200 can pass through the receiving gap 30 during the process of moving uniformly in the horizontal direction. When the packaging film 300 between two adjacent electrode assemblies 200 moves to the receiving gap 30, the first sealing member 10 or the second sealing member 20 can be controlled to move in the vertical direction, so that the first sealing member 10 and the second sealing member 20 approach each other in the vertical direction and press against the packaging film 300 to perform heat-sealing on the packaging film 300.
[0052] Among them, the first sealing member 10 and the second sealing member 20 can both be movably arranged along the first direction a. When performing heat-sealing, the first sealing member 10 and the second sealing member 20 are controlled to move and approach each other along the first direction a at the same time to perform heat-sealing on the packaging film 300. Of course, it can also be set that one of the first sealing member 10 and the second sealing member 20 is movably arranged along the first direction a, and the purpose of the first sealing member 10 and the second sealing member 20 approaching each other in the first direction a and performing heat-sealing on the packaging film 300 can also be achieved.
[0053] With the above structure, when at least two electrode assemblies 200 are continuously sealed, a packaging film 300 is connected between every two adjacent electrode assemblies 200. Each electrode assembly 200 is conveyed into the receiving gap 30. When the packaging film 300 between two adjacent electrode assemblies 200 moves into the receiving gap 30 and corresponds to the positions of the first sealing member 10 and the second sealing member 20, the first sealing member 10 and the second sealing member 20 can perform heat-sealing on the packaging film 300, thereby realizing double-sided heat-sealing through one heat-sealing operation and effectively improving production efficiency.
[0054] In some embodiments, both the first encapsulation member 10 and the second encapsulation member 20 include a sealing head 11. The sealing head 11 has a heat-sealing surface 12 facing the encapsulation film 300. In the second direction b, the width L1 of the heat-sealing surface 12 is equal to the width L2 of the sealing head 11, and the heat-sealing surface 12 is used to contact the encapsulation film 300 in a surface-to-surface manner to perform a heat-sealing operation. Wherein, the second direction b is set along the arrangement direction of each electrode assembly 200 and intersects with the first direction a.
[0055] Specifically, the sealing head 11 refers to the component that actually performs the heat-sealing operation on the encapsulation film 300. Among them, the heat-sealing surface 12 refers to a plane on the sealing head 11 facing the encapsulation film 300 and is used to contact the encapsulation film 300 in a surface-to-surface manner to perform the heat-sealing operation.
[0056] When the first direction a is set as the vertical direction, the second direction b can be set as the horizontal direction, and the second direction b is consistent with the uniform movement direction of each electrode assembly 200. The width of the heat-sealing surface 12 in the second direction b is set to be equal to the width of the sealing head 11 in the second direction b. For example, the sealing head 11 can be set as a rectangular structure, then the heat-sealing surface 12 is one of the planes of the sealing head 11 facing the encapsulation film 300.
[0057] When the encapsulation film 300 moves into the accommodation gap 30, control the sealing heads 11 to approach each other, so that the heat-sealing surface 12 is in surface-to-surface contact with the encapsulation film 300 and perform heat-sealing. In this way, the width of the heat-sealing area on the encapsulation film 300 in the second direction b is the same as the width of the heat-sealing surface 12, so that among two adjacent electrode assemblies 200, the right side of the electrode assembly 200 on the left and the left side of the electrode assembly 200 on the right are heat-sealed simultaneously, achieving the effect of heat-sealing both sides at one time and improving the heat-sealing efficiency.
[0058] In addition, since the width of the heat-sealing surface 12 is equal to the width of the sealing head 11, that is, the width of the heat-sealing area formed on the encapsulation film 300 after heat-sealing by the heat-sealing surface 12 is relatively large, it is convenient to cut the heat-sealing area of the encapsulation film 300 between every two adjacent electrode assemblies 200 subsequently, so that each electrode assembly 200 is independently encapsulated and formed.
[0059] Through the above structure, the heat-sealing surface 12 is in surface-to-surface contact with the encapsulation film 300 and realizes the heat-sealing operation, making the width of the heat-sealing area on the encapsulation film 300 relatively large. On the one hand, it can achieve the effect of heat-sealing both sides at one time and improve the heat-sealing efficiency; on the other hand, it is also convenient to cut the heat-sealing area of the heat-sealing film subsequently.
[0060] Such as Figure 2As shown, in some embodiments, the first encapsulation member 10 and the second encapsulation member 20 both include a first main body 13, a first heat-sealing portion 14 and a second heat-sealing portion 15 that are spaced apart from each other along the second direction b on the first main body 13. The first heat-sealing portion 14 and the second heat-sealing portion 15 both face the encapsulation film 300 and are used to contact the encapsulation film 300 to perform a heat-sealing operation. Among them, the second direction b is arranged along the arrangement direction of each electrode assembly 200 and intersects the first direction a.
[0061] Specifically, the first heat-sealing portion 14 and the second heat-sealing portion 15 refer to components that can abut against and contact the encapsulation film 300 and perform a heat-sealing operation. The first heat-sealing portion 14 and the second heat-sealing portion 15 are spaced apart from each other along the horizontal direction on the corresponding first main body 13, that is, the first heat-sealing portion 14 and the second heat-sealing portion 15 form a bimodal structure on the first main body 13.
[0062] Among them, the first heat-sealing portion 14 and the second heat-sealing portion 15 both face the encapsulation film 300. The first main body 13 can drive its respective first heat-sealing portion 14 and second heat-sealing portion 15 to approach each other along the vertical direction, and enable the first heat-sealing portion 14 and the second heat-sealing portion 15 to contact the encapsulation film 300, so as to perform a heat-sealing operation on the encapsulation film 300.
[0063] The first heat-sealing portion 14 and the second heat-sealing portion 15 can respectively form two left and right heat-sealing regions on the encapsulation film 300, that is, the separate heat-sealing of two adjacent electrode assemblies 200 can be realized, that is, the bilateral heat-sealing at one time can be realized.
[0064] Thus, by providing the first heat-sealing portion 14 and the second heat-sealing portion 15, the contact area and the heat-generating area with the encapsulation film 300 can be reduced, the heat generation amount can be reduced, the requirement for flatness can be lowered during the surface contact process with the encapsulation film 300, and the heat-sealing effect can be effectively improved.
[0065] In some embodiments, the processing device 100 further includes a first driving member (not shown in the figure) that is drivingly connected to the first encapsulation member 10 and / or the second encapsulation member 20. The first driving member is used to drive the first encapsulation member 10 and / or the second encapsulation member 20 to move along the first direction a.
[0066] Specifically, the first driving member is a structure for driving the first encapsulation member 10 and / or the second encapsulation member 20 to move along the first direction a. The first driving member can be but is not limited to being set as a driving motor, a driving cylinder, etc. When one of the first encapsulation member 10 and the second encapsulation member 20 is movably arranged along the first direction a, the first driving member is drivingly connected to the movable one of them. When both the first encapsulation member 10 and the second encapsulation member 20 are movably arranged, the first driving member is respectively drivingly connected to the first encapsulation member 10 and the second encapsulation member 20.
[0067] By setting up the first driving member, the first package 10 and / or the second package 20 can be smoothly driven to move along the first direction a, so that the first package 10 and the second package 20 can move closer to or farther away from each other in the first direction a, so as to achieve smooth heat sealing of the packaging film 300.
[0068] In some embodiments, the processing device 100 also includes a first follower (not shown in the figure) that is transmission-connected to the first package 10 and the second package 20. The first follower is used to drive the first package 10 and the second package 20 to move synchronously along the second direction b following the packaging film 300 during the heat sealing process.
[0069] Specifically, the first follower refers to a component that can drive the first package 10 and the second package 20 to move synchronously with the electrode assemblies 200 and the packaging film 300 along the second direction b. The first follower can be, but is not limited to, a servo module or a robot.
[0070] It should be noted that during the heat sealing operation, it is usually necessary to maintain heat pressing for a period of time to achieve stable heat sealing of the two layers of packaging film 300. For example, after the first packaging component 10 and the second packaging component 20 are in contact with the packaging film 300, they need to remain relatively still for 3s-5s or even longer to ensure that the upper and lower layers of packaging film 300 are tightly connected before they can be loosened.
[0071] Therefore, during the heat sealing process, after the first package 10 and the second package 20 come into contact with the packaging film 300, the first follower drives the first package 10 and the second package 20 to move synchronously along the second direction b following the packaging film 300, so that the first package 10 and the second package 20 and the packaging film 300 remain relatively still, thereby achieving non-stop heat sealing and improving production efficiency.
[0072] like Figure 1 As shown, in some embodiments, the processing device 100 further includes a cutting assembly 40 disposed downstream of the first package 10 and the second package 20 along the second direction b, and the cutting assembly 40 is movably disposed along the first direction a and is used to cut off the heat-sealed packaging film 300. The second direction b is disposed along the arrangement direction of each electrode assembly 200 and intersects with the first direction a.
[0073] After heat-sealing the upper and lower packaging films 300 by the first packaging component 10 and the second packaging component 20, the heat-sealed positions need to be cut so that each electrode assembly 200 after film coating can be independently formed after cutting, so as to facilitate placing it in a sealed container for isostatic pressing.
[0074] Based on this, along the direction in which each electrode assembly 200 moves at a constant speed, the cutting assembly 40 is arranged downstream of the first encapsulation member 10 and the second encapsulation member 20. After the encapsulation film 300 is heat-sealed at the positions of the first encapsulation member 10 and the second encapsulation member 20, it continues to move to the position corresponding to the cutting assembly 40, and then the cutting assembly 40 is controlled to cut off the encapsulation film 300 at the heat-sealed position on the encapsulation film 300, so that each electrode assembly 200 can be independently formed.
[0075] With the above structure, cutting after heat-sealing can be achieved, so that each electrode assembly 200 can be independently formed, which is convenient for isostatic pressing treatment.
[0076] In some embodiments, the cutting assembly 40 includes a first cutting knife 41 and a second cutting knife 42 that are arranged at intervals along the first direction a, and a cutting gap 43 for accommodating the heat-sealed encapsulation film 300 is formed between the two. At least one of the first cutting knife 41 and the second cutting knife 42 is movably arranged along the first direction a.
[0077] The first cutting knife 41 and the second cutting knife 42 are arranged at intervals in the vertical direction, and a cutting gap 43 is formed between the two. After the encapsulation film 300 is heat-sealed in the accommodation gap 30, it continues to move horizontally to the cutting gap 43. At this time, the first cutting knife 41 or the second cutting knife 42 is controlled to approach each other in the vertical direction, and through the mutual cooperation of the first cutting knife 41 and the second cutting knife 42, the heat-sealed area of the encapsulation film 300 is cut off, so that two adjacent electrode assemblies 200 can be independently formed.
[0078] Among them, both the first cutting knife 41 and the second cutting knife 42 can be movably arranged along the first direction a, or only one of them can be movably arranged along the first direction a, and both can achieve approaching or separating from each other along the first direction a, so as to smoothly achieve cutting.
[0079] With the above structure, after the encapsulation film 300 is heat-sealed, it can be cut in the cutting gap 43, and the heat-sealed area of the encapsulation film 300 is cut off, so that each electrode assembly 200 can be independently formed for subsequent isostatic pressing treatment.
[0080] Please refer to Figure 2 , in some embodiments, both the first cutting knife 41 and the second cutting knife 42 include a second main body 44, and a first cutting edge 45 and a second cutting edge 46 that are arranged at intervals along the second direction b on the second main body 44. Both the first cutting edge 45 and the second cutting edge 46 are arranged facing the encapsulation film 300.
[0081] Specifically, the first cutting edge 45 and the second cutting edge 46 are arranged at intervals in the horizontal direction on the second main body 44, that is, the first cutting edge 45 and the second cutting edge 46 form a double-edge structure on the second main body 44.
[0082] With the above structure, on the one hand, the effect of cutting both sides at one time can be achieved, improving efficiency. On the other hand, the design of the double-edge structure can effectively alleviate the problem of flanging during the cutting process.
[0083] In some embodiments, the processing device 100 further includes a second driving member (not shown in the figure) drivingly connected to the first cutting blade 41 and / or the second cutting blade 42, and the second driving member is configured to drive the first cutting blade 41 and / or the second cutting blade 42 to move along the first direction a.
[0084] Specifically, the second driving member is a structure for driving the first cutting blade 41 and / or the second cutting blade 42 to move along the first direction a, and the second driving member can be, but is not limited to, a driving motor, a driving cylinder, etc. When one of the first cutting blade 41 and the second cutting blade 42 is movably arranged along the first direction a, the second driving member is drivingly connected to the movable one, and when both the first cutting blade 41 and the second cutting blade 42 are movably arranged, the second driving member is respectively drivingly connected to the first cutting blade 41 and the second cutting blade 42.
[0085] By providing the second driving member, the first cutting blade 41 and / or the second cutting blade 42 can be smoothly driven to move along the first direction a, realizing the mutual approach or separation of the first cutting blade 41 and the second cutting blade 42 in the first direction a, so as to smoothly cut the encapsulation film 300.
[0086] In some embodiments, the processing device 100 further includes a second follower member (not shown in the figure) drivingly connected to the cutting assembly 40, and the second follower member is configured to drive the cutting assembly 40 to synchronously move along the second direction b following the encapsulation film 300 during the cutting process.
[0087] Specifically, the second follower member refers to a component that can drive the first cutting blade 41 and the second cutting blade 42 to synchronously move along the second direction b with each electrode assembly 200 and the encapsulation film 300. Among them, the second follower member can be, but is not limited to, a servo module or a robot.
[0088] During the cutting process, after the first cutting blade 41 and the second cutting blade 42 come into contact with the encapsulation film 300, the second follower member drives the first cutting blade 41 and the second cutting blade 42 to synchronously move along the second direction b following the encapsulation film 300, so that the first cutting blade 41 and the second cutting blade 42 remain relatively stationary with respect to the encapsulation film 300, realizing non-stop cutting and improving production efficiency.
[0089] Based on the same concept as the above processing device 100, the present application further provides a battery production device, including the above-mentioned processing device 100, and the processing device 100 is configured to perform heat sealing and cutting on at least two electrode assemblies 200.
[0090] According to one or more embodiments, first, at least two electrode assemblies 200 connected by a packaging film 300 are controlled to move uniformly in the horizontal direction. When the packaging film 300 between two adjacent electrode assemblies 200 moves into the accommodation gap 30, the first packaging member 10 and the second packaging member 20 are controlled to approach each other in the vertical direction until the first packaging member 10 and the second packaging member 20 come into contact with the packaging film 300, and heat sealing treatment is performed on the packaging film 300.
[0091] During the heat sealing process, the first packaging member 10 and the second packaging member 20 are driven by the first follower and move synchronously in the horizontal direction along with the packaging film 300 to achieve non-stop heat sealing.
[0092] After heat sealing is completed, the first packaging member 10 and the second packaging member 20 are controlled to move away from each other in the vertical direction. The packaging film 300 continues to move in the horizontal direction into the cutting gap 43, and the first cutter 41 and the second cutter 42 are controlled to approach each other in the vertical direction to cut the packaging film 300 from the heat-sealed area, so that each electrode assembly 200 can be independently formed after being coated with the film, which is convenient for subsequent isostatic pressing treatment.
[0093] Among them, during the cutting process, the first cutter 41 and the second cutter 42 are driven by the second follower and move synchronously in the horizontal direction along with the packaging film 300 to achieve non-stop cutting and improve production efficiency.
[0094] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.
[0095] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A processing device, characterized in that: Used to package at least two electrode assemblies, wherein a packaging film is connected between two adjacent electrode assemblies; the processing device includes a first packaging component and a second packaging component spaced apart along a first direction, with a accommodating gap formed therebetween for accommodating the packaging film, and at least one of the first packaging component and the second packaging component is movably arranged along the first direction to perform a heat sealing operation on the packaging film in the accommodating gap.
2. The processing device according to claim 1, characterized in that: The first packaging member and the second packaging member each include a sealing head, wherein the sealing head has a heat sealing surface disposed toward the packaging film, wherein the width of the heat sealing surface in the second direction is equal to the width of the sealing head, and the heat sealing surface is used to contact the packaging film surface to perform a heat sealing operation; Wherein, the second direction is arranged along the arrangement direction of each of the electrode assemblies and intersects with the first direction.
3. The processing device according to claim 1, characterized in that: The first packaging member and the second packaging member each include a first body and a first heat sealing portion and a second heat sealing portion spaced apart from each other on the first body along a second direction, wherein the first heat sealing portion and the second heat sealing portion are both disposed toward the packaging film and are used to contact the packaging film to perform a heat sealing operation; Wherein, the second direction is arranged along the arrangement direction of each of the electrode assemblies and intersects with the first direction.
4. The processing device according to any one of claims 1 to 3, characterized in that: The processing device further comprises a first driving member drivingly connected to the first packaging member and / or the second packaging member, wherein the first driving member is used for driving the first packaging member and / or the second packaging member to move along the first direction.
5. The processing device according to claim 2 or 3, characterized in that: The processing device further comprises a first follower which is drivingly connected to the first packaging component and the second packaging component, and the first follower is used for driving the first packaging component and the second packaging component to move synchronously along the second direction following the packaging film during the heat sealing process.
6. The processing device according to claim 1, characterized in that: The processing device further comprises a cutting assembly disposed downstream of the first packaging member and the second packaging member along a second direction, the cutting assembly being movably disposed along the first direction and used for cutting off the packaging film after heat sealing; Wherein, the second direction is arranged along the arrangement direction of each of the electrode assemblies and intersects with the first direction.
7. The processing device according to claim 6, characterized in that: The cutting assembly includes a first cutter and a second cutter spaced apart along the first direction, with a cutting gap formed therebetween for accommodating the heat-sealed packaging film, and at least one of the first cutter and the second cutter is movably disposed along the first direction.
8. The processing device according to claim 7, characterized in that: The first cutting knife and the second cutting knife each include a second body and a first blade and a second blade disposed on the second body at intervals along the second direction, and the first blade and the second blade are both disposed toward the packaging film.
9. The processing device according to claim 8, characterized in that: The processing device further comprises a second driving member drivingly connected to the first cutter and / or the second cutter, wherein the second driving member is used for driving the first cutter and / or the second cutter to move along the first direction.
10. The processing device according to claim 6, characterized in that: The processing device further comprises a second follower drivingly connected to the cutting assembly, wherein the second follower is used for driving the cutting assembly to move synchronously with the packaging film along the second direction during the cutting process.
11. A battery production device, characterized in that: It comprises a processing device as described in any one of claims 1 to 10, wherein the processing device is used to heat seal and cut at least two electrode assemblies.