Restraining device and power battery formation press

Abstract

The utility model provides a restraining device and a power battery formation press, and relates to the technical field of formation equipment. The restraining device comprises a collecting assembly and a restraining assembly, wherein a first guide rail is arranged on the collecting assembly; the restraining assembly comprises a plurality of restraining pressure plates and a pressurizing assembly, and the pressurizing assembly can apply extrusion force to the restraining pressure plates; the multiple restraining pressure plates are arranged in parallel and connected to the first guide rail in a sliding mode. According to the technical scheme, the structure of the restraining tray can be simplified by fixing the collecting assembly on the formation press, so that the damage degree of the tray in the transfer process is reduced, the transfer efficiency can be improved, the equipment remodeling efficiency is improved, the tray replacement cost is reduced, the production cost of the power battery is reduced, and the production efficiency is improved at the same time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of formation equipment, and particularly relates to a restraint device and a power battery formation press. BACKGROUND

[0002] In the field of new energy industry, as a key core component, lithium ion batteries are widely used in the fields of power, energy storage, 3C, etc., so the production of lithium ion batteries is increasingly concerned, especially the related production equipment, and the lithium ion charging and discharging equipment (separation process) is particularly important. The structure of the current lithium ion battery charging and discharging equipment mainly includes a power cabinet, a press, a tray, etc. Before the battery formation, the tray loaded with the battery needs to be transferred and placed on the formation press.

[0003] In order to better control the thickness of the battery and produce qualified batteries, a restraining force is applied to the battery cell during the charging and discharging process, therefore, in the prior art, a restraining structure is integrated on the tray, and after the battery cell is placed in the tray, the tray is placed in the cabinet for restraint and charging.

[0004] However, the tray in the prior art is integrated with the restraining structure, so that when producing different models of battery cells, the tray needs to be modified, and the tray is easily damaged and has low carrying efficiency during dynamic transfer, so that the production cost is high and the production efficiency is low. Content of the utility model

[0005] The present application provides a restraint device and a power battery formation press to solve the problem that when producing different models of battery cells, the tray needs to be modified, and the tray is easily damaged and has low carrying efficiency during dynamic transfer, thereby reducing the production cost and improving the production efficiency.

[0006] In a first aspect, the present application provides a restraint device, which comprises: a collection assembly, a first guide rail is arranged on the collection assembly; a restraint assembly, the restraint assembly comprises a plurality of restraint pressure plates and a pressing assembly, the pressing assembly can apply a pressing force to the restraint pressure plates; the plurality of restraint pressure plates are arranged in parallel with each other and are slidably connected to the first guide rail.

[0007] By the above scheme, the assembly is provided with a first guide rail for supporting, guiding and fixing the movement and positioning of the restraint assembly, which includes a plurality of restraint pressure plates and a pressing assembly. The pressing assembly is used to apply extrusion pressure to the restraint pressure plates to achieve the restraint of the battery cell. The plurality of restraint pressure plates are arranged in parallel with each other and are slidably connected to the first guide rail. Such design allows the restraint pressure plates to be adjusted according to the size and shape of the battery cell to adapt to different specifications of the battery cell. The design of the restraint device takes into account the gas and volume changes that may occur during the formation process of the battery cell. Through the adjustable restraint pressure plates and the pressing assembly, the thickness of the battery cell can be effectively controlled to prevent deformation of the battery cell, thereby improving the consistency and reliability of the battery. In addition, the design of the above restraint device realizes the universality and flexibility, which can be fixed on any position convenient for the formation of the power battery, such as being fixed on the formation press bed, thereby simplifying the structure of the restraint tray. In this way, the damage degree of the tray during transportation is reduced and the transportation efficiency is improved, the equipment modification efficiency is improved, and the cost of tray replacement is reduced, thereby reducing the production cost of the power battery and improving the production efficiency.

[0008] In a possible design, a support plate is further included for being fixed on an external support body, and the assembly is connected to the support plate.

[0009] By the above scheme, the support plate serves as a connection structure between the assembly and the external support body, which can provide additional stability. This helps to ensure that the restraint device does not displace or deform due to the expansion of the battery cell or other external forces during the formation process. The support plate allows the assembly to be conveniently fixed on the external support body, such as being fixed on the formation press bed or other structures. This design simplifies the installation process, enabling the restraint device to be quickly deployed and adjusted. Through the design of the support plate, the complexity of the restraint device during installation and use can be reduced, thereby reducing the production and maintenance costs.

[0010] In a possible design, a first connecting piece is further included, one end of the first connecting piece is fixed on the support plate, and the other end of the first connecting piece is fixed on the assembly.

[0011] By the above scheme, the first connecting piece connects the support plate and the assembly, providing a stable connection point to ensure that the restraint device can withstand the expansion of the battery cell or other external forces during the formation of the battery, maintaining the integrity of the structure. The design of the first connecting piece allows a certain degree of adjustment between the support plate and the assembly to adapt to different sizes and shapes of the battery cell, or to make fine adjustments according to different formation conditions.

[0012] In a possible design, a second connecting piece is further included, the second connecting piece has a connecting end part and a connecting body part connected with the connecting end part, the connecting end part is connected with the first guide rail in a matching manner, and the connecting body part is connected with the restraint pressure plate.

[0013] Through the above scheme, the design of the second connecting piece makes the connection between the restraint pressure plate and the first guide rail more modular, facilitating quick assembly and disassembly, and improving the maintenance and replacement efficiency of the restraint device. The connecting end part of the second connecting piece is connected with the first guide rail in a matching manner, which can ensure the accurate positioning and movement of the restraint pressure plate on the first guide rail, which is crucial for ensuring the accurate restraint of the battery during the formation process. The connecting body part of the second connecting piece is connected with the restraint pressure plate, which can better connect the effect, and the design of the second connecting piece allows the restraint pressure plate to slide freely on the first guide rail while maintaining on the preset track, which can ensure uniform distribution of restraint force and avoid uneven expansion of the battery during the formation process. Through the second connecting piece, the overall design of the restraint device can be more compact, reducing space occupation.

[0014] In a possible design, the number of second connecting pieces corresponds to the number of pressure plates, and the second connecting pieces can move in the first guide rail along with the sliding of the restraint pressure plates.

[0015] Through the above scheme, the one-to-one correspondence between the second connecting piece and the restraint pressure plate ensures that each restraint pressure plate can be independently connected with the first guide rail, which can more accurately control the position and movement of each pressure plate and improve the flexibility and accuracy of the overall restraint device. When the restraint pressure plate slides on the first guide rail, the corresponding second connecting piece also moves, ensuring the synchronization between the restraint pressure plate and the first guide rail, which is crucial for maintaining uniform restraint of the battery during the formation process. Since the second connecting piece corresponds to the restraint pressure plate one by one, maintenance and replacement can be carried out for individual components, simplifying the maintenance process and reducing maintenance cost. The second connecting piece can be designed as a component with positioning function, reducing the movement error of the restraint pressure plate on the first guide rail and improving the positioning accuracy.

[0016] In a possible design, the first guide rail has a plurality of guide rail holes, the number of guide rail holes corresponds to the number of second connecting pieces, the connecting end part is correspondingly arranged in the guide rail hole, and the second connecting piece has a sliding space in the guide rail hole.

[0017] By the above scheme, the guide hole provides an accurate positioning point for the second connecting piece, ensuring that the movement of the restraint pressure plate on the first guide rail is more accurate and controllable. The second connecting piece has a sliding space in the guide hole, which means that each restraint pressure plate can move flexibly along the corresponding guide hole to adapt to the expansion or contraction of the battery cell during the formation process. Since each second connecting piece corresponds to a guide hole, it can ensure that the restraint force is evenly distributed on the entire battery cell, avoiding local overpressure or underpressure, and can evenly restrain the force.

[0018] In a possible design, the guide hole includes first and second accommodation spaces arranged in an upper and lower row, the first accommodation space has a larger hole diameter than the second accommodation space, and when the second connecting piece passes through the guide hole, the connecting end portion only slides in the first accommodation space, and the connecting body portion can pass out of the second accommodation space and be connected with the restraint pressure plate.

[0019] By the above scheme, the connecting end portion of the second connecting piece slides in the larger first accommodation space, while the connecting body portion passes out of the smaller second accommodation space, which allows the connecting end portion to slide without restriction while ensuring that the connecting body portion can be stably connected with the restraint pressure plate. Since the connecting end portion only slides in the larger first accommodation space, it reduces the contact area with the guide hole wall, thereby reducing wear and tear and prolonging the service life of the second connecting piece and the guide hole. The smaller second accommodation space can provide more precise control to ensure accurate positioning of the connecting body portion when it passes out, which is crucial for accurate positioning of the restraint pressure plate and uniform distribution of the restraint force. This design simplifies the assembly process of the second connecting piece and the restraint pressure plate, as the connecting body portion can directly pass out of the second accommodation space and be connected with the restraint pressure plate without the need for additional adjustment or alignment. This design allows the restraint device to adapt to different specifications of restraint pressure plates, as the connecting body portion can pass out of the second accommodation space and be connected with restraint pressure plates of different sizes.

[0020] In a possible design, the pressurizing assembly includes a cross beam and a fixing plate, the fixing plate is arranged at one end of the first guide rail, the fixing plate and the plurality of restraint pressure plates are provided with connecting holes, and the cross beam passes through the connecting holes to connect the fixing plate and the plurality of restraint pressure plates; along the cross beam, the restraint pressure plates away from the other end of the fixing plate are connected with pressure connecting rods, and the pressure connecting rods are used to be connected with the pressure transmission system.

[0021] Through the above scheme, the cross beam connects the fixed plate and the plurality of restraint pressure plates through the connecting holes to form a stable structural frame, which helps to provide uniform and stable restraint force during the formation process of the battery cell. Through the design of the connecting hole, the cross beam can accurately connect the fixed plate and the restraint pressure plate together, ensuring the assembly accuracy and reliability of the restraint device. The design of the cross beam allows the restraint pressure to be evenly distributed on each restraint pressure plate, which can ensure that the battery cell receives uniform restraint force during the formation process and avoids local deformation. The design of the cross beam and the connecting hole allows quick adjustment of the position of the restraint pressure plate to adapt to different sizes of battery cells, and also facilitates maintenance and replacement of the restraint pressure plate. The pressure connecting rod is connected to the restraint pressure plate at the other end away from the fixed plate, and such a design can effectively transmit the pressure from the pressure transmission system to the restraint pressure plate, ensuring accurate application of the restraint force. The combination of the fixed plate, the cross beam and the restraint pressure plate provides a modular restraint assembly that can be quickly replaced or adjusted as needed, improving the flexibility and adaptability of the restraint device. This design simplifies the assembly and adjustment process of the restraint device, reduces downtime on the production line, and improves production efficiency. The connection between the pressure connecting rod and the pressure transmission system can be designed with a safety release mechanism that can automatically or manually release the pressure in abnormal conditions to protect the safety of the operators and equipment. This design makes the restraint device adaptable to different battery specifications and formation conditions, improving the adaptability and versatility of the restraint device.

[0022] In one possible design, a probe is further included, which is connected below the collection assembly and arranged between two adjacent restraint pressure plates.

[0023] Through the above scheme, the probe is used to contact the electrode of the battery cell for electrical performance testing to verify the load-carrying capacity, safety performance, etc. of the battery cell. The probe is connected below the collection assembly and arranged between two adjacent restraint pressure plates, which can ensure that the probe is accurately connected to the tab of the battery cell, and the position of the battery cell and the probe is automatically aligned. The probe fixing plate is provided with a long strip-shaped transverse adjustment hole, and the probe is arranged in the transverse adjustment hole and locked to the probe fixing plate, which can flexibly adjust the position of the probe to meet the alignment requirements of the probe and the electrode. The needle of the probe is configured to be elastically abutted with the electrode, for example, a spring or other component is added to the needle of the probe to realize the elastic abutment between the probe and the electrode. Even if the positions of the probes in the same horizontal plane deviate, the abutment and conduction between the probes and the electrode can still be realized smoothly. The design of the probe not only improves the accuracy and efficiency of the battery cell testing in the restraint device, but also enhances the monitoring capability of the electrical performance of the battery cell, which is crucial for ensuring the quality and safety of the battery formation process.

[0024] In a second aspect, the application provides a power battery formation press, comprising the restraint device of any of the above.

[0025] The power battery formation press provided in the above second aspect and each possible design of the above second aspect has the beneficial effects of the power battery formation press provided in the above first aspect and each possible design of the above first aspect, which will not be repeated here.

[0026] The above description is only a summary of the technical solutions of the embodiments of the application, in order to more clearly understand the technical means of the embodiments of the application, the embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the embodiments of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 The schematic view of the restraint device provided in an embodiment of the application from one perspective.

[0029] Figure 2 The schematic view of the restraint device provided in an embodiment of the application from another perspective.

[0030] Figure 3 The schematic view of the restraint device provided in an embodiment of the application from another perspective.

[0031] Figure 4 The schematic view of the restraint device provided in an embodiment of the application from another perspective.

[0032] Figure 5 The schematic view of the restraint device provided in an embodiment of the application from another perspective.

[0033] Figure 6 The schematic view of the restraint device provided in an embodiment of the application from another perspective.

[0034] Figure 7 The schematic view of the restraint device provided in an embodiment of the application from another perspective.

[0035] Figure 8 The schematic view of the restraint device provided in an embodiment of the application from another perspective. Figure 7 The sectional view along the section line AA1.

[0036] Figure 9 FIG. 1 is a schematic view of a restraint assembly in a restraint device according to an embodiment of the present application.

[0037] Explanation of Reference Signs:

[0038] 100, support plate; 110, first connecting member; 200, collection assembly; 210, second connecting member; 211, connecting main body portion; 212, connecting end portion; 213, fixing hole; 220, first guide rail; 221, first accommodation space; 222, second accommodation space; 300, restraint assembly; 301, restraint pressure plate; 302, fixing plate; 310, cross beam; 320, pressure connecting rod; 400, bottom plate; 401, spacer block; 500, battery cell; 600, probe. DETAILED DESCRIPTION

[0039] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terminology used in the specification of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application; the terms "comprise" and "have" and any variations thereof in the specification of the present application and the description of the drawings are intended to cover non-exclusive inclusion.

[0041] Reference herein to "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase "embodiment" appearing at various locations in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0042] The term "and / or" herein is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of existence of A, existence of A and B, and existence of B. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0043] The positional words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not intended to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0045] In the description of the present application, unless otherwise stated, "a plurality of" means two or more (including two), and similarly "a plurality of groups" means two or more groups (including two groups).

[0046] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, the "connection" or "connection" of mechanical structures can mean physical connection, for example, the physical connection can be a fixed connection, for example, a fixed connection by a spacer, for example, a fixed connection by a screw, bolt or other spacer; the physical connection can also be a detachable connection, for example, a mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welded, bonded or integrally formed to form a connection for connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the process of automatically producing batteries, during the formation process, due to the unqualified raw materials, unqualified electrolyte, etc., the appearance of the battery cell is swollen, and the appearance of the battery cell is effectively solved by the battery cell restraint tray.

[0048] The battery cell restraint tray in the related art is integrated with a restraint structure on the tray, but due to the fact that the battery cell restraint tray is integrated with many parts, the overall mass of the tray is large, the tray is easily damaged during dynamic transfer, and the handling efficiency is low; when the battery cell is changed (different models of battery cells are replaced), the battery cell restraint tray needs to be modified, which is time-consuming and laborious; when the tray is replaced, the restraint assembly needs to be considered, and the replacement cost is high.

[0049] Therefore, the application provides a restraining device and a power battery formation press, which strip the restraining assembly from the tray and set it on the collection assembly by designing the collection assembly. Since the collection assembly is used to support the restraining assembly and uniform the restraining force, the tray structure is simplified, so that the tray is not easy to be damaged in the dynamic transfer process, and the transfer efficiency is improved. The tray replacement cost is reduced, so that the production cost of the lithium ion battery is reduced, and the production efficiency of the lithium ion battery is improved.

[0050] In order to enable personnel in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings.

[0051] Figure 1 A schematic view of the restraining device from a perspective in the present embodiment. Figure 6 A schematic view of the collection assembly 200 in the restraining device provided in the present embodiment. Figure 7 A schematic view of the collection assembly 200 from another perspective in the restraining device provided in the present embodiment. Please refer to Figure 1 、 Figure 6 and Figure 7 The present embodiment provides a restraining device, which comprises a collection assembly 200 and a restraining assembly 300, the collection assembly 200 is provided with a first guide rail 220; the restraining assembly 300 comprises a plurality of restraining pressure plates 301 and a pressurizing assembly, the pressurizing assembly can apply extrusion force to the restraining pressure plates 301; the plurality of restraining pressure plates 301 are arranged in parallel with each other and are all slidingly connected to the first guide rail 220.

[0052] Through the above scheme, the gathering assembly 200 is provided with the first guide rail 220 for supporting, guiding and fixing the movement and positioning of the restraint assembly 300, and the restraint assembly 300 includes a plurality of restraint pressure plates 301 and a pressing assembly. The function of the pressing assembly is to apply extrusion pressure to the restraint pressure plates 301 to achieve restraint of the battery cell 500. The plurality of restraint pressure plates 301 are arranged in parallel with each other and are slidably connected to the first guide rail 220. Such a design allows the restraint pressure plates 301 to be adjusted according to the size and shape of the battery cell 500 to adapt to battery cells 500 of different specifications. The design of the restraint device takes into account the gas and volume changes that may occur during the formation process of the battery cell 500. Through the adjustable restraint pressure plates 301 and the pressing assembly, the thickness of the battery cell 500 can be effectively controlled to prevent deformation of the battery cell 500, thereby improving the consistency and reliability of the battery. In addition, the design of the above restraint device achieves universality and flexibility, which can be fixed on any position convenient for the formation of the power battery, for example, the gathering assembly 200 can be fixed on the formation press bed, thereby simplifying the structure of the restraint tray. In this way, the damage degree of the tray during transfer is reduced and the transfer efficiency is improved, the equipment model change efficiency is improved, and the cost of tray replacement is reduced, thereby reducing the production cost of the power battery and improving the production efficiency.

[0053] Figure 2 A schematic view of the restraint device provided in the present embodiment from another perspective. Figure 3 A schematic view of the restraint device provided in the present embodiment from another perspective. Please refer to Figure 2 and Figure 3 In the present embodiment, the technical device further includes a support plate 100, and the support plate 100 is used to be fixed on an external support body. The gathering assembly 200 can be connected to the support plate 100.

[0054] The support plate 100 serves as a connecting structure between the gathering assembly 200 and the external support body, and can provide additional stability.

[0055] This helps to ensure that during the formation process, the restraint device will not be displaced or deformed due to the expansion of the battery cell 500 or other external forces. The support plate 100 allows the gathering assembly 200 to be conveniently fixed on the external support body. The external support body in the present embodiment is a formation press bed. By fixing the support plate 100 on the formation press bed, the restraint device can be quickly deployed and adjusted. Through the design of the support plate 100, the complexity of the restraint device during installation and use can be reduced, thereby reducing production and maintenance costs.

[0056] In this embodiment, the assembly 200 is connected to the support plate 100 through the first connecting piece 110, one end of the first connecting piece 110 is fixed on the support plate 100, and the other end of the first connecting piece 110 is fixed on the assembly 200.

[0057] The first connecting piece 110 connects the support plate 100 and the assembly 200, providing a stable connection point, ensuring that the restraint device can withstand the expansion of the battery cell 500 or other external forces during the battery formation process, and maintaining the integrity of the structure. The design of the first connecting piece 110 allows for some degree of adjustment between the support plate 100 and the assembly 200 to accommodate battery cells 500 of different sizes and shapes, or to fine-tune according to different formation conditions.

[0058] In this embodiment, the first connecting piece 110 can be a column, and multiple first connecting pieces 110 are evenly arranged between the assembly 200 and the support plate 100, so that a stable connection is ensured while the overall mass of the restraint structure is reduced.

[0059] Figure 4 The second connecting piece 210 structure is shown in the restraint device provided in this embodiment. Figure 5 Another perspective view of the second connecting piece 210 structure in the restraint device provided in this embodiment is shown. Please refer to Figure 4 and Figure 5 In this embodiment, the second connecting piece 210 is also included, the second connecting piece 210 has a connecting end portion 212 and a connecting main body portion 211 connected to the connecting end portion 212, the connecting end portion 212 is connected to the first guide rail 220, and the connecting main body portion 211 is connected to the restraint pressure plate 301.

[0060] The design of the second connecting piece 210 makes the connection between the restraint pressure plate 301 and the first guide rail 220 more modular, facilitating quick assembly and disassembly, and improving the maintenance and replacement efficiency of the restraint device. The connecting end portion 212 of the second connecting piece 210 is connected to the first guide rail 220, which can ensure the precise positioning and movement of the restraint pressure plate 301 on the first guide rail 220, which is crucial for ensuring the accurate restraint of the battery cell 500 during the formation process. The connecting main body portion 211 of the second connecting piece 210 is connected to the restraint pressure plate 301, which can better connect the effect, and the design of the second connecting piece 210 allows the restraint pressure plate 301 to slide freely on the first guide rail 220 while maintaining on the preset track, which can ensure the uniform distribution of the restraint force and avoid the uneven expansion of the battery cell 500 during the formation process. Through the second connecting piece 210, the overall design of the restraint device can be more compact, reducing space occupation.

[0061] In this embodiment, the connecting end part 212 is spherical and the connecting body part 211 is cylindrical, which facilitates the connection of the connecting end part 212 in the first guide rail 220. After the connecting body part 211 is connected to the restraint pressure plate 301, the restraint pressure plate 301 can slide along the first guide rail 220.

[0062] In some embodiments, the second connecting piece 210 can be designed to have a safety locking mechanism that can be automatically or manually locked or released in abnormal situations to protect the safety of the operators and equipment. The second connecting piece 210 can also be designed according to different working environments and conditions, such as in high temperature, high pressure or corrosive environments, to select appropriate materials and designs to ensure the reliability of the restraint device.

[0063] In this embodiment, the number of second connecting pieces 210 corresponds to the number of pressure plates, and the second connecting pieces 210 can move within the first guide rail 220 along with the sliding of the restraint pressure plate 301.

[0064] The one-to-one correspondence between the second connecting piece 210 and the restraint pressure plate 301 ensures that each restraint pressure plate 301 can be independently connected to the first guide rail 220, which allows more precise control of the position and movement of each pressure plate and improves the flexibility and accuracy of the overall restraint device. When the restraint pressure plate 301 slides on the first guide rail 220, the corresponding second connecting piece 210 also moves, ensuring the synchronization between the restraint pressure plate 301 and the first guide rail 220, which is crucial for maintaining the uniform restraint of the battery cell 500 during the formation process. Since the second connecting piece 210 corresponds one-to-one to the restraint pressure plate 301, maintenance and replacement can be performed on individual components, simplifying the maintenance process and reducing maintenance costs. The second connecting piece 210 can be designed as a component with positioning function, reducing the movement error of the restraint pressure plate 301 on the first guide rail 220 and improving the positioning accuracy.

[0065] Please continue to refer to Figure 6 and Figure 7 In this embodiment, the first guide rail 220 is provided with a plurality of guide rail holes, the number of guide rail holes corresponds to the number of second connecting pieces 210, the connecting end part 212 is correspondingly arranged in the guide rail hole, and the second connecting piece 210 has a sliding space in the guide rail hole.

[0066] By the above scheme, the guide hole provides an accurate positioning point for the second connecting piece 210, ensuring that the movement of the restraint pressure plate 301 on the first guide rail 220 is more accurate and controllable. The second connecting piece 210 has a sliding space in the guide hole, which means that each restraint pressure plate 301 can move flexibly along the corresponding guide hole to adapt to the expansion or contraction of the battery cell 500 during the formation process. Since each second connecting piece 210 corresponds to a guide hole, it can ensure that the restraint force is evenly distributed on the entire battery cell 500, avoiding local overpressure or underpressure, and can evenly restrain the force.

[0067] Figure 8 For Figure 7 the cross-sectional view along the section line AA1. Please refer to Figure 8 In this embodiment, the guide hole includes a first accommodating space 221 and a second accommodating space 222 arranged in an upper and lower manner, the hole diameter of the first accommodating space 221 is larger than that of the second accommodating space 222, when the second connecting piece 210 passes through the guide hole, the connecting end portion 212 only slides in the first accommodating space 221, and the connecting body portion 211 can pass out of the second accommodating space 222 and be connected with the restraint pressure plate 301.

[0068] By the above scheme, the connecting end portion 212 of the second connecting piece 210 slides in the larger first accommodating space 221, while the connecting body portion 211 passes out of the smaller second accommodating space 222, such a design allows the connecting end portion 212 to slide without restriction, while ensuring that the connecting body portion 211 can be stably connected with the restraint pressure plate 301. Since the connecting end portion 212 only slides in the larger first accommodating space 221, this reduces the contact area with the guide hole wall, thereby reducing wear and tear and prolonging the service life of the second connecting piece 210 and the guide hole. The smaller second accommodating space 222 can provide more accurate control, ensuring accurate positioning of the connecting body portion 211 when passing out, which is crucial for accurate positioning of the restraint pressure plate 301 and uniform distribution of the restraint force. This design simplifies the assembly process of the second connecting piece 210 and the restraint pressure plate 301, because the connecting body portion 211 can directly pass out of the second accommodating space 222 and be connected with the restraint pressure plate 301 without the need for additional adjustment or alignment. This design allows the restraint device to adapt to restraint pressure plates 301 of different specifications, because the connecting body portion 211 can pass out of the second accommodating space 222 and be connected with restraint pressure plates 301 of different sizes.

[0069] Figure 9 For the schematic view of the restraint assembly 300 in the restraint device provided in an embodiment of the present application. Please refer to Figure 9The pressurizing assembly further comprises a cross beam 310 and a fixed plate 302, the fixed plate 302 is arranged at one end of the first guide rail 220, the fixed plate 302 and the plurality of restraint pressure plates 301 are provided with connecting holes, and the cross beam 310 connects the fixed plate 302 and the plurality of restraint pressure plates 301 by penetrating through the connecting holes; along the cross beam 310, the pressure connecting rod 320 is connected to the restraint pressure plate 301 away from the other end of the fixed plate 302, and the pressure connecting rod 320 is used to be connected with the pressure transmission system.

[0070] In this embodiment, the restraint pressure plate 301 at one end of the first guide rail 220 is the fixed plate 302, which needs to be fixed and cannot slide. Please refer to Figure 6 and Figure 7 The fixed hole 213 is arranged at the position where the fixed plate 302 is located, and when the second connecting piece 210 is connected in the fixed hole 213, the fixed plate 302 does not slide.

[0071] Through the above scheme, the cross beam 310 penetrates through the connecting holes to connect the fixed plate 302 and the plurality of restraint pressure plates 301 in series to form a stable structural frame, which helps to provide uniform and stable restraint force during the formation process of the battery cell 500. Through the design of the connecting holes, the cross beam 310 can accurately connect the fixed plate 302 and the restraint pressure plates 301 together, ensuring the assembly precision and operation reliability of the restraint device. The design of the cross beam 310 enables the restraint pressure to be uniformly distributed on each restraint pressure plate 301, which can ensure that the battery cell 500 receives uniform restraint force during the formation process and avoids local deformation. The design of the cross beam 310 and the connecting holes allows quick adjustment of the position of the restraint pressure plate 301 to adapt to battery cells 500 of different sizes, and also facilitates maintenance and replacement of the restraint pressure plate 301.

[0072] The pressure connecting rod 320 is connected to the restraint pressure plate 301 away from the other end of the fixed plate 302, and such a design can effectively transmit the pressure from the pressure transmission system to the restraint pressure plate 301, ensuring accurate application of the restraint force. The pressure transmission system can provide power for the sliding of the restraint pressure plate 301.

[0073] The combination of the fixed plate 302, the cross beam 310 and the restraint pressure plate 301 provides a modular restraint assembly 300, which can be quickly replaced or adjusted as needed, improving the flexibility and adaptability of the restraint device. This design simplifies the assembly and adjustment process of the restraint device, reduces downtime on the production line, and improves production efficiency.

[0074] In some embodiments, the connection between the pressure connecting rod 320 and the pressure transmission system can be designed to have a safety release mechanism that can automatically or manually release pressure in abnormal situations to protect the safety of operators and equipment.

[0075] Please refer to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 , the restraint device is also provided with a probe 600, which is connected below the collection assembly 200 and corresponds to the setting between the adjacent two restraint pressure plates 301.

[0076] It can be understood that the probe 600 is used to contact the electrode of the battery cell and perform electrical performance test to check the load capacity and safety performance of the battery cell 500. The probe 600 fixing plate 302 is provided with a long strip-shaped transverse adjustment hole, the probe 600 is arranged in the transverse adjustment hole and is locked on the probe 600 fixing plate 302, so that the position of the probe 600 can be flexibly adjusted to meet the alignment requirements of the probe 600 and the electrode. The needle head of the probe 600 is configured to be elastically abutted with the electrode, for example, a spring or other component is added to the needle head of the probe 600 to realize the elastic abutment between the probe 600 and the electrode. Even if the positions of the probes 600 on the same horizontal plane deviate, the probes 600 and the electrode can still be abutted and conducted smoothly.

[0077] In the embodiment, the probe 600 is connected below the collection assembly 200 and corresponds to the setting between the adjacent two restraint pressure plates 301, so that the probe 600 can be accurately connected with the tab of the battery cell 500 to realize the automatic alignment of the position of the battery cell and the probe 600. The design of the probe 600 not only improves the accuracy and efficiency of the test of the battery cell 500 in the restraint device, but also enhances the monitoring ability of the electrical performance of the battery cell 500, which is crucial for ensuring the quality and safety of the battery formation process.

[0078] Based on the above embodiment, the power battery formation press in the embodiment also provides a restraint device.

[0079] Please continue to refer to Figure 1 , the tray in the power battery formation press only includes the isolation block 401 and the bottom plate 400, the battery cell 500 is isolated and positioned by the isolation block 401, and the height of the isolation block 401 can be determined according to the specific use scene. The tray structure is simple, light in quality, reduces the damage degree of the tray in the transfer process and improves the transfer efficiency, improves the equipment model change efficiency, and reduces the cost of tray replacement.

[0080] Through the power battery formation press described above, the battery cell 500 is put into the area of the spacer block 401 in the tray by artificial or mechanical arm, and then the tray is inserted into the capacity cabinet by artificial or logistics trolley. After the charging and discharging process is started, the press as a whole is lowered, and stops when the distance between the probe 600 and the pole of the battery cell 500 is greater than or equal to 10 mm or stops after being lowered by a certain distance (the probe 600 does not contact the pole of the battery cell 500). At this time, the lower surface of the pressure plate is higher than the upper surface of the spacer block 401 on the tray, and the restraint assembly 300 is connected to the pressure transmission system through the pressure connecting rod 320. Then the pressure transmission system starts to work to make the restraint pressure plates 301 tightly contact with the battery cell 500. In this process, the second connecting piece 210 slides in the collection assembly 200 until the interaction force between the restraint pressure plate 301 and the battery cell 500 reaches the preset value, and then the pressure transmission system stops delivering pressure and keeps the pressure value. Then the probe 600 is connected to the pole of the battery cell 500 by being pressed down, and the charging and discharging process is started. When the charging and discharging process is finished, the probe 600 is controlled to rise, the pressure transmission system releases the pressure, the press as a whole is raised, and the battery cell 500 is transferred out of the capacity cabinet with the tray.

[0081] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A restraint device, characterized by, The restraining device comprises: a collecting assembly, wherein a first guide rail is arranged on the collecting assembly; a restraining assembly, wherein the restraining assembly comprises a plurality of restraining pressure plates and a pressing assembly, the pressing assembly is capable of applying extrusion pressure to the restraining pressure plates, the plurality of restraining pressure plates are arranged in parallel with each other and are slidably connected to the first guide rail.

2. The restraint device of claim 1, wherein, The restraining device further comprises a support plate, which is arranged on an external support body, and the collecting assembly is connected to the support plate.

3. Restraint device according to claim 2, characterized in that The restraining device further comprises a first connecting member, one end of the first connecting member is fixed to the support plate, and the other end of the first connecting member is fixed to the collecting assembly.

4. The restraint device of claim 1, wherein, The restraining device further comprises a second connecting member, the second connecting member has a connecting end portion and a connecting body portion connected to the connecting end portion, the connecting end portion is connected to the first guide rail, and the connecting body portion is connected to the restraining pressure plate.

5. The restraint device of claim 4, wherein, The number of the second connecting members corresponds to the number of the pressure plates, and the second connecting members are capable of moving in the first guide rail along with the sliding of the restraining pressure plates.

6. The restraint device of claim 5, wherein, The first guide rail has a plurality of guide rail holes, the number of the guide rail holes corresponds to the number of the second connecting members, the connecting end portion is arranged in the guide rail hole, and the second connecting member has a sliding space in the guide rail hole.

7. The restraint device of claim 6, wherein, The guide rail hole comprises a first accommodating space and a second accommodating space arranged in sequence, the aperture of the first accommodating space is larger than the aperture of the second accommodating space, when the second connecting member passes through the guide rail hole, the connecting end portion only slides in the first accommodating space, and the connecting body portion can pass out of the second accommodating space and be connected to the restraining pressure plate.

8. The restraint device of claim 1, wherein, The pressing assembly comprises a cross beam and a fixing plate, the fixing plate is arranged at one end of the first guide rail, the fixing plate and the plurality of restraining pressure plates are provided with connecting holes, and the cross beam passes through the connecting holes to connect the fixing plate and the plurality of restraining pressure plates. A pressure connecting rod is connected to the restraining pressure plate away from the other end of the fixing plate along the cross beam, and the pressure connecting rod is used to be connected to a pressure transmission system.

9. The restraint device of claim 1, wherein, The restraining device further comprises a probe, which is connected below the collecting assembly and is arranged between two adjacent restraining pressure plates.

10. A power cell formation press, characterized by, The restraining device comprises the restraining device according to any one of claims 1-9. The restraining device comprises the restraining device according to any one of claims 1-9.

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