Clamping device and battery production system

Abstract

The utility model provides a clamping device and a battery production system, the clamping device comprises at least two clamping pieces and at least two heating pieces, the at least two clamping pieces are arranged at intervals along a first direction, and the clamping pieces are used for clamping single batteries. The at least two heating pieces are connected to the clamping piece, at least one heating piece is used for heating the side part of the single battery along the first direction, at least one heating piece is used for heating the side part of the single battery along the second direction, and the first direction intersects with the second direction. The clamping device provided by the utility model is beneficial to improving the flow rate of the electrolyte in the electrode assembly, accelerating the diffusion of the electrolyte in the electrode assembly, improving the discharge rate of gas in the electrode assembly, improving the wettability of the electrolyte to the electrode assembly and reducing the risk of poor infiltration of partial region of the electrode assembly; and the reliability of the single battery is improved.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and more specifically, to a clamping device and a battery manufacturing system. Background Technology

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] In the battery manufacturing process, a series of processes are required for battery cells, including baking, electrolyte injection, and impregnation. Specifically, the battery cells are first baked, and then electrolyte is injected into the casing of the battery cell, impregnating the electrode assembly. During battery cell manufacturing, the wettability of the electrolyte to the electrode assembly has a significant impact on the subsequent performance of the battery cell. Therefore, how to improve the wettability of the electrolyte to the electrode assembly during battery cell manufacturing is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] This application provides a clamping device and a battery production system, which is beneficial to improving the wettability of the electrolyte to the electrode assembly during the production of battery cells.

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

[0006] In a first aspect, the clamping device provided in the embodiments of this application includes at least two clamping members and at least two heating members. The at least two clamping members are spaced apart along a first direction, and the clamping members are used to clamp battery cells. At least two heating members are connected to the clamping members, wherein at least one heating member is used to heat the side portion of the battery cell along the first direction, and at least one heating member is used to heat the side portion of the battery cell along a second direction, where the first and second directions intersect.

[0007] The clamping device provided in this application embodiment, by providing at least two heating elements, heats the side of the battery cell along the first direction or the side along the second direction during the process of injecting or wetting the battery cell. This is beneficial to increasing the flow rate of the electrolyte inside the electrode assembly, accelerating the diffusion of the electrolyte inside the electrode assembly, and increasing the rate of gas discharge inside the electrode assembly. This is beneficial to improving the wettability of the electrolyte to the electrode assembly, reducing the risk of poor wetting in some areas of the electrode assembly, and improving the reliability of the battery cell.

[0008] According to some embodiments of this application, at least one heating element is connected to the ends of two adjacent clamping elements along a third direction to heat the side of the battery cell along the third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0009] In the above scheme, by setting at least one heating element connected to the ends of two adjacent clamping elements along the third direction, the side of the battery cell along the third direction is heated, which is beneficial to further improve the gas discharge rate inside the electrode assembly, and is beneficial to further improve the rate of electrolyte penetration into the electrode assembly, and is beneficial to further improve the wettability of the electrolyte to the electrode assembly.

[0010] According to some embodiments of this application, along a first direction, the clamping member is configured to clamp the large surface of a battery cell.

[0011] In the above scheme, the area of ​​the battery cell along the first direction side is larger than the area of ​​the battery cell along other directions. That is, the heating element can heat at least the side of the battery cell with a larger area. This is beneficial to improve the heating rate of the battery cell and the electrolyte inside the battery cell, thereby further improving the gas discharge rate inside the electrode assembly, and further improving the rate at which the electrolyte penetrates into the electrode assembly, and further improving the wettability of the electrolyte to the electrode assembly.

[0012] According to some embodiments of this application, the clamping device includes at least three clamping members, which are spaced apart along a first direction, and a battery cell is clamped between any two adjacent clamping members.

[0013] In the above scheme, one clamping device can clamp at least two battery cells, allowing for simultaneous liquid injection and wetting processes on at least two battery cells, which is beneficial for improving the production efficiency of battery cells. Furthermore, since only one battery cell is clamped between two adjacent clamping devices, the heating efficiency of the heating element on the battery cell is improved, further enhancing the wettability of the battery cell.

[0014] According to some embodiments of this application, each clamping member is connected to a heating element, and any two adjacent clamping members are used to clamp only one battery cell, so that each battery cell is heated by the heating element on both sides along the first direction.

[0015] The above scheme is beneficial to improving the uniformity of heating of the battery cells by the heating element, further improving the gas discharge rate inside the electrode assembly, further improving the rate at which the electrolyte penetrates into the electrode assembly, and further improving the wettability of the electrolyte on the electrode assembly.

[0016] According to some embodiments of this application, the heating element includes a resistance wire that extends in a spiral shape, or the resistance wire extends alternately in two intersecting directions.

[0017] In the above scheme, it is beneficial to reduce the volume occupied by the heating element. By setting the resistance wire to extend in a spiral shape or to extend alternately in two intersecting directions, it is beneficial to improve the uniformity of the resistance wire distribution, thereby improving the uniformity of the heating element on the battery cell and further improving the wettability of the electrolyte on the electrode assembly.

[0018] According to some embodiments of this application, the clamping device further includes a temperature adjustment element, which is electrically connected to the heating element and is used to adjust the heating temperature of the battery cell by the heating element.

[0019] In the above scheme, the heating element can be adjusted to a corresponding temperature in different production processes of the battery cell. This allows for flexible adjustment of the heating temperature of the battery cell, improving the baking efficiency during the baking stage and enhancing the wettability of the electrolyte to the electrode assembly during the electrolyte injection and impregnation processes. Furthermore, the same clamping device can be used in multiple processes during battery cell production, saving transfer time and further improving production efficiency.

[0020] According to some embodiments of this application, the clamping device further includes a clamping force adjustment component, which is connected to the clamping member to adjust the clamping force of the clamping member on the battery cell along a first direction.

[0021] In the above scheme, by setting a clamping force adjustment component to adjust the clamping force and pressure of the clamping component on the battery cell, the same clamping device can be used in multiple processes, reducing the time required for battery cell transfer and improving the production efficiency of battery cells. Furthermore, in the electrolyte injection and wetting stages, by providing a certain squeezing force to the battery cell, the gas discharge rate inside the electrode assembly is increased, which further improves the wettability of the electrolyte on the electrode assembly.

[0022] According to some embodiments of this application, the clamping force adjustment assembly includes an airbag located on at least one side of the clamping member facing the battery cell.

[0023] The above solution simplifies the structure of the clamping force adjustment component and improves the accuracy and convenience of adjusting the clamping force of the clamping component on the battery cell.

[0024] According to some embodiments of this application, the clamping force adjustment assembly includes a guide member, and the clamping member is movably connected to the guide member in a first direction so that the clamping member can move relative to the guide member in the first direction.

[0025] The above solution improves the convenience of adjusting the clamping force of the clamping component on the battery cell by the clamping component adjustment assembly.

[0026] According to some embodiments of this application, the guide includes a lead screw, and a clamping member passes through the guide and is threadedly connected to the guide.

[0027] The above solution improves the convenience of adjusting the clamping force of the clamping component on the battery cell. Furthermore, the screw is threadedly connected to the clamping component, and when the clamping component moves to the correct position, the screw and the clamping component can achieve a self-locking function, which helps to simplify the structure of the clamping force adjustment component.

[0028] According to some embodiments of this application, the guide member and the clamping member are slidably connected, and the clamping force adjustment assembly further includes a locking member connected to the guide member and used to limit the sliding of the clamping member relative to the guide member.

[0029] The above solution facilitates the adjustment of the clamping force and pressure of the clamping component on the battery cell, and enables the clamping component to have a relatively stable clamping force and pressure on the battery cell.

[0030] According to some embodiments of this application, the clamping force adjustment assembly further includes an elastic element, which passes through the guide member, and the elastic element is clamped between any two adjacent clamping members.

[0031] The above solution is conducive to further improving the convenience of adjusting the clamping force and pressure of the battery cells by the clamping adjustment assembly, and further improving the wettability of the electrolyte to the battery cells by improving the uniformity of the pressure and clamping force borne by multiple battery cells.

[0032] Secondly, the battery production system provided in this application includes the clamping device provided in any of the above embodiments.

[0033] The battery production system provided in this application has the same technical effect as the clamping device provided in this application, and will not be described again here.

[0034] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a clamping device provided in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of another clamping device provided in the embodiments of this application, showing the clamping state of a single battery cell;

[0038] Figure 3 This is a schematic diagram of another clamping device provided in an embodiment of this application.

[0039] The accompanying drawings are not necessarily drawn to scale.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-Clamping device;

[0042] 10-Clamping components;

[0043] 20 - Heating element; 21 - Resistance wire;

[0044] 30 - Temperature regulating component;

[0045] 40 - Clamping force adjustment assembly; 41 - Guide component; 42 - Elastic component;

[0046] 50 - Support component;

[0047] 100-cell battery;

[0048] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0051] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0054] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0055] During the production process, battery cells need to go through baking, electrolyte injection and wetting processes in sequence. During baking, the battery cells need to be heated to remove the moisture inside the battery cells. Then, the battery cells are injected with electrolyte. After the electrolyte injection is completed, the battery cells are left to stand so that the electrolyte can wet into the electrode assembly.

[0056] However, in related technologies, during the electrolyte injection and wetting process of battery cells, as the electrolyte seeps into the electrode assembly, the volume of the electrode assembly gradually increases. The rate of gas overflow from the center of the electrode assembly is less than the time it takes for the electrolyte to form a liquid seal around the electrode assembly. In other words, the electrolyte seeps into the electrode assembly from the periphery and seals the central area of ​​the electrode assembly. This can easily lead to the gas inside the electrode assembly, especially in the central area, not being able to diffuse in time. This can easily result in some areas of the electrode assembly not being wetted by the electrolyte or being incompletely wetted. As a result, the wettability of the electrode assembly is poor, which seriously affects the reliability of the battery cell.

[0057] In view of this, the clamping device provided in the embodiments of this application includes at least two clamping members and at least two heating members. The at least two clamping members are spaced apart along a first direction, and the clamping members are used to clamp battery cells. The at least two heating members are connected to the clamping members, wherein at least one is used to heat the side of the battery cell along the first direction, and at least one heating member is used to heat the side of the battery cell along a second direction, wherein the first direction and the second direction intersect.

[0058] The clamping device provided in this application embodiment, by providing at least two heating elements, heats the side of the battery cell along the first direction or the side along the second direction during the process of injecting or wetting the battery cell. This is beneficial to increasing the flow rate of the electrolyte inside the electrode assembly, accelerating the diffusion of the electrolyte inside the electrode assembly, and increasing the rate of gas discharge inside the electrode assembly. This is beneficial to improving the wettability of the electrolyte to the electrode assembly, reducing the risk of poor wetting in some areas of the electrode assembly, and improving the reliability of the battery cell.

[0059] The technical solutions described in the embodiments of this application are applicable to clamping devices and battery production systems including clamping devices.

[0060] The battery disclosed in this application can be a single battery cell or a battery device. A single battery cell is the smallest energy unit in a battery device for energy storage and release. The battery device can be used, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric bicycles, electric motorcycles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0061] Firstly, such as Figure 1 and Figure 2 As shown, the clamping device 1 provided in this embodiment includes at least two clamping members 10 and at least two heating members 20. The at least two clamping members 10 are spaced apart along a first direction X, and the clamping members 10 are used to clamp battery cells 100. The at least two heating members 20 are connected to the clamping members 10, wherein at least one heating member 20 is used to heat the side of the battery cell 100 along the first direction X, and at least one heating member 20 is used to heat the side of the battery cell 100 along the second direction Y.

[0062] The clamping device 1 includes at least two clamping members 10. Optionally, the clamping device 1 may include two or more clamping members 10, and one or two battery cells 100 may be clamped between two clamping members 10. For example, the clamping device 1 may be configured to include at least three clamping members 10, and only one battery cell 100 may be clamped between any two adjacent clamping members 10 along the first direction X.

[0063] The clamping member 10 clamps the battery cell 100 in a manner that may only provide a certain degree of fixation and positioning for the battery cell 100 without applying pressure to it; or, the clamping member 10 may apply a certain amount of pressure to the battery cell 100 along the first direction X. In this way, during the process of electrolyte injection or immersion of the battery cell 100, the pressure of the clamping member 10 on the battery cell 100 may squeeze out the electrolyte inside the electrode assembly, which is beneficial to further improve the wettability of the electrolyte to the electrode assembly.

[0064] The clamping device 1 may also include a support member 50 or similar structure, so that the clamping member 10 can be connected to and supported on the support member 50.

[0065] The clamping device 1 includes one, two, or more heating elements 20. The heating element 20 may be in the form of a heating film or a heating plate, and is connected to at least one side of the clamping member 10 facing the electrode assembly. Alternatively, the heating element 20 may be a resistance wire 21, etc., and integrated inside the clamping member 10. Each clamping member 10 may be provided with at least one heating element 20, or heating elements 20 may be connected to only some of the clamping members 10. For example, heating elements 20 may be provided on each side of each clamping member 10 facing the battery cell 100 to heat each side of the battery cell 100.

[0066] At least one heating element 20 is used to heat the side of the battery cell 100 along the first direction X, and at least another heating element 20 is used to heat the side of the battery cell 100 along the second direction Y. Thus, the at least two heating elements 20 can heat the same battery cell 100 along the first direction X and the second direction Y respectively, or the at least two heating elements 20 can heat different battery cells 100 along the first direction X and the second direction Y respectively. For example, multiple heating elements 20 can be provided to heat both sides of each battery cell 100 along the first direction X and both sides along the second direction Y.

[0067] Optionally, the heating element 20 can be a heating film or a heating plate, or the heating element 20 can be a resistance wire 21 integrated inside the plate-like structure. Therefore, the structural form of the heating element 20 connected to the end of the clamping member 10 along the second direction Y can be the same as the structural form of the clamping member 10 and the heating element 20 connected thereto integrated together.

[0068] The connection between the heating element 20 and the clamping element 10 can be a fixed connection or a movable connection.

[0069] The structural forms of different heating elements 20 may be the same or different. For example, the heating element 20 used to heat the side of the battery cell 100 along the first direction X may be a resistance wire 21 and integrated into the interior of the plate-shaped clamping member 10, while the heating element 20 used to heat the side of the battery cell 100 along the second direction Y may be a heating plate. Therefore, the heating element 20 used to heat the side of the battery cell 100 along the second direction Y has the same structural form as the structure after the clamping member 10 and the heating element 20 used to heat the side of the battery cell 100 along the first direction X are integrated.

[0070] During the process of injecting or immersing the battery cell 100 with electrolyte, the temperature of the electrolyte can be increased. This helps to increase the flow rate of the electrolyte, accelerate the diffusion of the electrolyte inside the electrode assembly, increase the rate at which the electrolyte penetrates into the electrode assembly, and increase the rate at which gas escapes from inside the electrode assembly. This helps to reduce the risk of the electrolyte forming a liquid seal in the central area of ​​the electrode assembly, which would prevent the gas inside the electrode assembly from escaping. In turn, it helps to improve the wettability of the electrolyte to the electrode assembly.

[0071] The heating temperature of the heating element 20 can be constant. For example, the heating temperature of the heating element 20 can be set to be constant at around 50°C, or the heating temperature of the heating element 20 can be set to be adjustable, and different heating temperatures can be set for the heating element 20 as needed in different processes or in the production process of different types of battery cells 100. Therefore, the clamping device 1 provided in this application embodiment can be used only in the liquid injection and wetting processes, or the clamping device 1 provided in this application embodiment can be used in baking, liquid injection, wetting, and formation processes.

[0072] The clamping device 1 provided in this application embodiment, by providing at least two heating elements 20, heats the side of the battery cell 100 along the first direction X or along the second direction Y during the process of injecting or wetting the battery cell 100. This is beneficial to increasing the flow rate of the electrolyte inside the electrode assembly, accelerating the diffusion of the electrolyte inside the electrode assembly, and increasing the rate of gas discharge inside the electrode assembly. This is beneficial to improving the wettability of the electrolyte to the electrode assembly, reducing the risk of poor wetting in some areas of the electrode assembly, and improving the reliability of the battery cell 100.

[0073] In some embodiments, such as Figure 1 and Figure 2 As shown, at least one heating element 20 is connected to the ends of two adjacent clamping elements 10 along the third direction Z to heat the side of the battery cell 100 along the third direction Z, where the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0074] The heating element 20 connecting the two adjacent clamping members 10 along the third direction Z can be a heating plate, a heating film, or a resistance wire 21, etc., and the resistance wire 21 can be integrated into the plate-like structure. Therefore, the heating element 20 used to heat the side of the battery cell 100 along the third direction Z has the same structural form as the structure after the clamping members 10 and the heating element 20 used to heat the side of the battery cell 100 along the first direction X are integrated.

[0075] The third direction Z can be the direction in which the battery cell 100 is provided with terminals, that is, the direction in which the tabs of the electrode assembly are led out. The heating element 20 can be used to heat the battery cell 100 and the side of the battery cell 100's casing away from the electrode terminals.

[0076] Optionally, heating elements 20 may be provided at one end of any two adjacent clamping members 10 along the third direction Z, or heating elements 20 may be provided only at one end of some two adjacent clamping members 10 along the third direction Z.

[0077] By providing at least one heating element 20 connected to the ends of two adjacent clamping elements 10 along the third direction Z, the side of the battery cell 100 along the third direction Z is heated, which is beneficial to further improve the gas discharge rate inside the electrode assembly, and is beneficial to further improve the rate at which the electrolyte penetrates into the electrode assembly, and is beneficial to further improve the wettability of the electrolyte to the electrode assembly.

[0078] In some embodiments, such as Figure 1As shown, along the first direction X, the clamping member 10 is configured to clamp the large surface of the battery cell 100. The large surface of the battery cell 100 can be the surface with the larger area among the multiple sides of the battery cell 100. When the clamping member 10 clamps the battery cell 100, the area of ​​the side of the battery cell 100 along the first direction X is larger than the area of ​​the sides of the battery cell 100 in other directions. That is, the heating member 20 can heat at least the side of the battery cell 100 with the larger area. This is beneficial to increasing the heating rate of the battery cell 100 and the electrolyte inside the battery cell 100 by the heating member 20, so as to further increase the gas discharge rate inside the electrode assembly, and further increase the rate at which the electrolyte penetrates into the electrode assembly, and further improve the wettability of the electrolyte to the electrode assembly.

[0079] In some embodiments, such as Figure 1 and Figure 2 As shown, the clamping device 1 includes at least three clamping members 10, which are spaced apart along the first direction X, and a battery cell 100 is clamped between any two adjacent clamping members 10.

[0080] Thus, a single clamping device 1 can clamp at least two battery cells 100, allowing for simultaneous liquid injection and wetting processes on both cells, which improves the production efficiency of the battery cells 100. Furthermore, since only one battery cell 100 is clamped between two adjacent clamping members 10, the heating efficiency of the heating element 20 on the battery cell 100 is improved, further enhancing the wettability of the battery cell 100.

[0081] In some embodiments, such as Figure 1 and Figure 2 As shown, each clamping member 10 is connected to a heating member 20, and any two adjacent clamping members 10 are used to clamp only one battery cell 100, so that any battery cell 100 is heated by the heating member 20 on both sides along the first direction X.

[0082] Optionally, a clamping member 10 may be connected to a heating element 20, or the two battery cells 100 on both sides of the clamping member 10 along the first direction X may be heated by a heating element 20, or a clamping member 10 may be connected to heating elements 20 on both sides of the clamping member 10 along the first direction X, so as to heat the battery cells 100 on both sides of the clamping member 10 along the first direction X respectively.

[0083] This configuration helps to improve the uniformity of heating of the battery cell 100 by the heating element 20, further improves the gas discharge rate inside the electrode assembly, and further improves the rate at which the electrolyte penetrates into the electrode assembly, thus further improving the wettability of the electrolyte on the electrode assembly.

[0084] In some embodiments, such as Figure 1 As shown, the heating element 20 includes a resistance wire 21, which extends in a spiral shape, or the resistance wire 21 extends alternately in two intersecting directions.

[0085] The resistance wire 21 can be integrated inside the clamping member 10. The resistance wire 21 extends alternately along two intersecting directions. Optionally, the resistance wire 21 can be extended in a "bow" shape or a "W" shape.

[0086] This helps to reduce the volume occupied by the heating element 20. By setting the resistance wire 21 to extend in a spiral shape or to extend alternately in two intersecting directions, it is beneficial to improve the uniformity of the distribution of the resistance wire 21, thereby improving the uniformity of heating of the battery cell 100 by the heating element 20, and further improving the wettability of the electrolyte to the electrode assembly.

[0087] In some embodiments, such as Figure 1 As shown, the clamping device 1 also includes a temperature adjustment component 30, which is electrically connected to the heating component 20 and is used to adjust the heating temperature of the battery cell 100 by the heating component 20.

[0088] The temperature adjustment component 30 can adjust the heating temperature of the heating element 20 on the battery cell 100 by adjusting the heating power of the adjustment component. It is understood that the heating temperature required for the battery cell 100 in different processes during production is not the same. For example, the required temperature is about 100°C in the baking stage, while the required heating temperature is about 50°C in the liquid injection or impregnation process.

[0089] By setting the temperature adjustment component 30, the heating element 20 can be adjusted to have corresponding temperatures in different production processes of the battery cell 100. This allows for flexible adjustment of the heating temperature of the battery cell 100 by the heating element 20, improving the baking efficiency of the battery cell 100 during the baking stage, and improving the wettability of the electrolyte to the electrode assembly during the electrolyte injection and impregnation processes. Furthermore, the same clamping device 1 can be used in multiple processes during the production of the battery cell 100, which helps save the transfer time during the production of the battery cell 100, further improving the production efficiency of the battery cell 100.

[0090] In some embodiments, such as Figure 3 As shown, the clamping device 1 also includes a clamping force adjustment component 40, which is connected to the clamping member 10 to adjust the clamping force of the clamping member 10 on the battery cell 100 along the first direction X.

[0091] The clamping force of the clamping member 10 on the battery cell 100 along the first direction X can be adjusted by moving the distance between two adjacent clamping members 10 along the first direction X. Therefore, the clamping force adjustment assembly 40 includes a distance adjustment member, such as a guide rod.

[0092] Alternatively, the clamping force of the clamping member 10 on the battery cell 100 can be adjusted by adjusting the gas pressure. Therefore, the clamping force adjustment component 40 may include an airbag connected to the clamping member 10 and located between the clamping member 10 and the battery cell 100. The pressure on the battery cell 100 can be adjusted by adjusting the air pressure inside the airbag.

[0093] It is understandable that the pressure requirements for battery cell 100 vary in different processes during the production of battery cell 100. For example, no pressure is required for battery cell 100 during the baking stage, but a certain amount of pressure is applied to battery cell 100 during the electrolyte injection or wetting stage, which helps to increase the gas discharge rate inside the electrode assembly and thus improves the wettability of the electrolyte to the electrode assembly.

[0094] Therefore, by setting the clamping force adjustment component 40 to adjust the clamping force and pressure of the clamping member 10 on the battery cell 100, the same clamping device 1 can be used in multiple processes, reducing the time required for the transfer of the battery cell 100, which is beneficial to improving the production efficiency of the battery cell 100. Furthermore, in the electrolyte injection and wetting stages, by providing a certain squeezing force to the battery cell 100, the gas discharge rate inside the electrode assembly is increased, which further improves the wettability of the electrolyte on the electrode assembly.

[0095] In some embodiments, the clamping force adjustment assembly 40 includes an airbag located on at least one side of the clamping member 10 toward the battery cell 100.

[0096] The airbag can be a separate, independent structure, clamped between the clamping member 10 and the battery cell 100 when needed. Alternatively, the airbag can be fixedly connected to the clamping member 10 or integrated with it. By adjusting the pressure of the gas inside the airbag, the clamping force of the clamping member 10 on the battery cell 100 can be adjusted.

[0097] This design simplifies the structure of the clamping force adjustment component 40 and improves the accuracy and convenience of the clamping force adjustment component 40 in adjusting the clamping force of the electric clamping member 10 on the battery cell 100.

[0098] In some embodiments, such as Figure 3 As shown, the clamping force adjustment assembly 40 includes a guide 41, and the clamping member 10 is movably connected to the guide 41 along a first direction X, so that the clamping member 10 can move relative to the guide 41 along the first direction X.

[0099] The guide member 41 and the clamping member 10 are movably connected along the first direction X. Optionally, the guide member 41 and the clamping member 10 can be slidably connected or threadedly connected. By setting the guide member 41, the distance between two adjacent clamping members 10 can be adjusted by moving the clamping member 10 relative to the guide member 41, thereby adjusting the clamping force and pressure of the clamping member 10 on the battery cell 100.

[0100] This improves the convenience of adjusting the clamping force of the clamping member 10 on the battery cell 100 by the clamping member 10 adjustment assembly.

[0101] In some embodiments, the guide 41 includes a lead screw, and the clamping member 10 passes through the guide 41 and is threadedly connected to the guide 41.

[0102] Thus, rotating the lead screw can convert the helical motion of the lead screw relative to the clamping member 10 into the displacement of the clamping member 10 along the first direction X, thereby adjusting the distance between the clamping members 10 and adjusting the clamping force and pressure of the clamping member 10 on the battery cell 100. This improves the convenience of adjusting the clamping force of the clamping member 10 on the battery cell 100. Furthermore, the lead screw is threadedly connected to the clamping member 10, and when the distance of the clamping member 10 is moved into place, the lead screw and the clamping member 10 can achieve a self-locking function, which helps to simplify the structure of the clamping force adjustment assembly 40.

[0103] It is understandable that in order to adjust the distance between the two clamping parts 10, the two adjacent clamping parts 10 can be moved in opposite directions. In order to achieve opposite movement distances for the two adjacent clamping parts 10, the threads of the adjacent clamping parts 10 that cooperate with the lead screw can be set to have opposite rotation directions, so that the two adjacent clamping parts 10 can move relative to or away from each other.

[0104] In some embodiments, the guide 41 is slidably connected to the clamping member 10, and the clamping force adjustment assembly 40 further includes a locking member connected to the guide 41 and used to limit the sliding of the clamping member 10 relative to the guide 41.

[0105] The guide member 41 is slidably connected to the clamping member 10, which can drive the clamping member 10 to slide relative to the guide member 41 to adjust the spacing between two adjacent clamping members 10 along the first direction X, thereby adjusting the pressure and clamping force of the clamping member 10 on the battery cell 100. After the clamping member 10 slides to the guide member 41 to the desired distance, that is, when the clamping member 10 has a suitable clamping force and pressure on the battery cell 100, the movement of the clamping member 10 relative to the guide member 41 can be restricted by the locking member to maintain the clamping force and pressure of the clamping member 10 on the battery cell 100.

[0106] This design improves the ease of adjusting the clamping force and pressure of the clamping member 10 on the battery cell 100, and makes the clamping member 10 have a relatively stable clamping force and pressure on the battery cell 100.

[0107] In some embodiments, such as Figure 3 As shown, the clamping force adjustment assembly 40 also includes an elastic element 42, which passes through the guide 41, and the elastic element 42 is clamped between any two adjacent clamping elements 10.

[0108] Optionally, the elastic element 42 can be a spring or similar structure. In this way, when adjusting the distance between the clamping elements 10, the clamping element 10 at the far end along the first direction X can be pushed to move along the first direction X, while the other clamping elements 10 will also move along the first direction X under the action of the elastic element 42. After the adjustment is completed, the elastic force of the elastic element 42 is more evenly distributed, so the clamping force and pressure of the clamping elements 10 on different battery cells 100 are also more evenly distributed.

[0109] Therefore, this configuration is beneficial to further improve the convenience of adjusting the clamping force and pressure of the clamping force on the battery cell 100 by the clamping member 10 adjustment assembly, and further improves the wettability of the electrolyte on the battery cell 100 by improving the uniformity of the pressure and clamping force borne by multiple battery cells 100.

[0110] Secondly, the battery production system provided in the embodiments of this application includes the clamping device 1 provided in any of the above embodiments.

[0111] The battery production system provided in this application has the same technical effect as the clamping device 1 provided in this application, and will not be described again here.

[0112] In some embodiments, such as Figures 1 to 3As shown, the clamping device 1 includes at least three clamping members 10, multiple heating members 20, a temperature adjustment member 30, and a clamping force adjustment assembly 40. The at least three clamping members 10 are spaced apart along a first direction X. Each clamping member 10 clamps a battery cell 100. At least one heating member 20 is connected to a clamping member 10 and is used to heat the side of the battery cell 100 along the first direction X. Each clamping member 10 is connected to a heating member 20, and any two adjacent clamping members 10 are used to clamp only one battery cell 100, so that the heating member 20 heats both sides of any battery cell 100 along the first direction X. At least one heating member 20 is connected to one end of two adjacent clamping members 10 along a second direction Y to heat the side of the battery cell 100 along the second direction Y. At least one heating member 20 is connected to the end of two adjacent clamping members 10 along a third direction Z to heat the side of the battery cell 100 along the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The dimension of the clamping member 10 along the second direction Y is larger than the distance between two adjacent clamping members 10 along the first direction X, and a battery cell 100 is clamped between any two adjacent clamping members 10. The heating member 20 includes a resistance wire 21, which extends in a spiral shape, or the resistance wire 21 extends alternately along two intersecting directions. The temperature adjustment member 30 is electrically connected to the heating member 20 and is used to adjust the heating temperature of the battery cell 100 by the heating member 20. The clamping device 1 also includes a clamping force adjustment assembly 40, which is connected to the clamping member 10 to adjust the clamping force of the clamping member 10 on the battery cell 100 along the first direction X.

[0113] The clamping device 1 provided in this application embodiment, by providing a heating element 20, heats the battery cell 100 during the process of injecting or wetting the battery cell 100. This helps to increase the flow rate of the electrolyte inside the electrode assembly, accelerate the diffusion of the electrolyte inside the electrode assembly, and increase the rate of gas discharge inside the electrode assembly. This helps to improve the wettability of the electrolyte to the electrode assembly, reduce the risk of poor wetting in some areas of the electrode assembly, and improve the reliability of the battery cell 100.

[0114] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A clamping device, characterized in that, The clamping device is used to hold individual battery cells and includes: At least two clamping members are provided, and the at least two clamping members are spaced apart along a first direction, the clamping members being used to clamp the battery cell; At least two heating elements are provided, both of which are connected to the clamping member. At least one heating element is used to heat the side of the battery cell along the first direction, and at least one heating element is used to heat the side of the battery cell along the second direction, wherein the first direction and the second direction intersect.

2. The clamping device according to claim 1, characterized in that, At least one of the heating elements is connected to the ends of two adjacent clamping elements along a third direction to heat the side of the battery cell along the third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

3. The clamping device according to claim 2, characterized in that, Along the first direction, the clamping member is configured to clamp the large surface of the battery cell.

4. The clamping device according to claim 1, characterized in that, The clamping device includes at least three clamping members, which are spaced apart along the first direction, and one battery cell is clamped between any two adjacent clamping members.

5. The clamping device according to claim 1, characterized in that, Each of the clamping members is connected to the heating element, and any two adjacent clamping members are used to clamp only one battery cell, so that each battery cell is heated by the heating element on both sides along the first direction.

6. The clamping device according to any one of claims 1 to 5, characterized in that, The heating element includes a resistance wire that extends in a spiral shape, or the resistance wire extends alternately in two intersecting directions.

7. The clamping device according to any one of claims 1 to 5, characterized in that, The clamping device further includes a temperature adjustment component, which is electrically connected to the heating component and is used to adjust the heating temperature of the battery cell by the heating component.

8. The clamping device according to any one of claims 1 to 5, characterized in that, The clamping device further includes a clamping force adjustment component, which is connected to the clamping member to adjust the clamping force of the clamping member on the battery cell along the first direction.

9. The clamping device according to claim 8, characterized in that, The clamping force adjustment assembly includes an airbag located on at least one side of the clamping member facing the battery cell.

10. The clamping device according to claim 8, characterized in that, The clamping force adjustment assembly includes a guide member, and the clamping member is movably connected to the guide member along the first direction so that the clamping member can move relative to the guide member along the first direction.

11. The clamping device according to claim 10, characterized in that, The guide includes a lead screw, and the clamping member passes through the guide and is threadedly connected to the guide.

12. The clamping device according to claim 10, characterized in that, The guide member is slidably connected to the clamping member, and the clamping force adjustment assembly further includes a locking member connected to the guide member and used to limit the sliding of the clamping member relative to the guide member.

13. The clamping device according to claim 12, characterized in that, The clamping force adjustment assembly also includes an elastic element, which passes through the guide member, and the elastic element is clamped between any two adjacent clamping members.

14. A battery production system, characterized in that, Includes the clamping device as described in any one of claims 1 to 13.

Images