Isostatic press fixture, isostatic press device, and battery production line

Abstract

This application relates to an isostatic pressing fixture, an isostatic pressing device, and a battery production line. The isostatic pressing fixture is used to clamp battery cells and includes a fixed base, a movable base, and an elastic element. The movable base is positioned opposite and spaced apart from the fixed base along a first direction, and the elastic element is connected between the fixed base and the movable base along the first direction. The isostatic pressing fixture has a first state in which the elastic element is in a stretched state and defines a constraint space between the fixed base and the movable base for placing at least one battery cell. The isostatic pressing fixture can provide uniform constraint force to the battery cells undergoing the isostatic pressing process, thereby improving the uniformity of pressure on the battery cells and thus improving the performance and stability of the battery cells.

Description

Technical Field

[0001] This application relates to the field of isostatic pressing technology, and in particular to isostatic pressing fixtures, isostatic pressing devices, and battery production lines. Background Technology

[0002] Isostatic pressing technology is one of the key technologies for the fabrication of solid-state batteries. Isostatic pressing technology refers to the technique of improving the performance and stability of solid-state batteries by applying static pressure.

[0003] Isostatic clamps are typically used to hold individual battery cells and place them together in a warm isostatic chamber. However, during the isostatic pressing process of battery cells, the isostatic clamps in the relevant technologies may result in a lack of constraint on the battery cells, leading to uneven pressure on the solid-state battery. Utility Model Content

[0004] Therefore, it is necessary to provide an isostatic pressing fixture, an isostatic pressing device, and a battery production line to address the above technical problems.

[0005] According to a first aspect of this application, an isostatic clamp is provided for clamping a battery cell. The isostatic clamp includes a fixed base, a movable base, and an elastic member. The movable base is positioned opposite to and spaced apart from the fixed base along a first direction, and the elastic member is connected between the fixed base and the movable base along the first direction. The isostatic clamp has a first state in which the elastic member is in a stretched state and is used to define a constraint space between the fixed base and the movable base for placing at least one battery cell.

[0006] When using the isostatic pressing fixture of this application, the movable seat can be moved away from the fixed seat along a first direction, thereby stretching the elastic element. At least one battery cell can be placed between the fixed seat and the movable seat. Then, the movable seat is slowly released, and the battery cell is clamped by the movable seat and the fixed seat. At this time, the elastic element is in a stretched state, so that the isostatic pressing fixture can provide a certain constraint force to the battery cell. In this way, during the isostatic pressing process of at least one battery cell, the elastic element can be adaptively adjusted according to the thickness change of the battery cell, so that the isostatic pressing fixture can provide a uniform constraint force to the battery cell during the isostatic pressing process, thereby improving the pressure uniformity of the battery cell and thus improving the performance and stability of the battery cell.

[0007] In one embodiment, the isostatic clamp includes a plurality of elastic elements, which are located at opposite ends of a fixed seat or a movable seat along a second direction; wherein the first direction and the second direction intersect each other.

[0008] In this way, multiple elastic elements can be used to improve the connection reliability between the movable seat and the fixed seat, and also make it easier for the movable seat to move more stably relative to the fixed seat in the first direction.

[0009] In one embodiment, the elastic element is detachably connected between the fixed seat and the movable seat.

[0010] This facilitates the installation of the elastic components and also makes it easy to change the model of the elastic components, so as to select the appropriate model of elastic components according to the constraint requirements of different models of battery cells, thereby meeting the production needs of more models of battery cells.

[0011] In one embodiment, the isostatic clamp further includes a guide connected to the fixed seat; the movable seat is slidably connected to the guide along a first direction.

[0012] In this way, the movable seat can be oriented relative to the fixed seat in the first direction, thereby improving the stability of the movable seat moving in the first direction.

[0013] In one embodiment, the isostatic clamp further includes at least one clamping member disposed within a constrained space along a first direction. A first receiving space for placing a battery cell is defined between the clamping member and the fixed base; and / or, a second receiving space for placing a battery cell is defined between the clamping member and the movable base; and / or, the isostatic clamp further includes at least two clamping members spaced apart along the first direction; a third receiving space for placing a battery cell is defined between two adjacent clamping members.

[0014] It is understood that the battery cells placed in the first, second, and / or third receiving spaces are located within the constraint space. Thus, during the isostatic pressing process, the elastic element can adaptively adjust according to the thickness change of the battery cell, enabling the isostatic pressing fixture to provide uniform constraint force to the battery cell during the isostatic pressing process, thereby improving the pressure uniformity of the battery cell and thus improving the performance and stability of the battery cell.

[0015] In one embodiment, the clamping member includes a porous structure.

[0016] Because the clamping component has a porous structure, the pores in the clamping component can be used to allow isostatic liquid (oil) to permeate to the surface of the battery cell, so that an oil film is formed on the surface of the battery cell. This oil film is at the same pressure as the isostatic liquid (oil), so that the pressure can be evenly transmitted to the surface of the battery cell, thereby making the battery cell subjected to uniform pressure.

[0017] In one embodiment, the isostatic pressing fixture further includes a limiting seat, which is located on the same side of the fixed seat and the movable seat along a third direction; the clamping member has a limiting groove adapted to the limiting seat on the side of the clamping member near the limiting seat along the third direction, and cooperates with the limiting seat to limit the movement of the clamping member along the second direction. The first direction, the second direction and the third direction intersect each other.

[0018] Since the clamping member and the limiting seat cooperate to restrict the movement of the clamping member along the second direction, the limiting groove can be used to restrict the movement of the clamping member and the battery cell along the second direction, thereby improving the reliability of the clamping member and the battery cell in the fixed seat, which is conducive to improving the pressure uniformity of the battery cell.

[0019] In one embodiment, a first opening is defined between one end of the fixed seat and the movable seat along a third direction, and a second opening is defined between the other end of the fixed seat and the movable seat along a third direction; the first opening and the second opening are respectively connected to the constraint space. The isostatic clamp also includes a limiting seat, which is located on the side of the second opening away from the first opening along a third direction.

[0020] The fixed seat can be detachably mounted on the clamping device, with the side of the fixed seat away from the clamping device facing upwards in the first direction. Then, a robotic arm pulls the movable seat upwards, placing the assembly of multiple battery cells and clamping components between the fixed seat and the movable seat. The limiting component of the limiting seat can also be engaged in the limiting groove. Then, the movable seat is slowly released, thus using the isostatic clamp to hold the battery cells and provide a certain constraint force to them. After the assembly of multiple battery cells and clamping components is clamped, the fixed seat can be removed from the clamping device. Then, the isostatic clamp is placed in the isostatic chamber. At this time, the limiting seat is positioned with the side closer to the fixed seat facing upwards in the third direction. The limiting seat can support the fixed seat and the movable seat, and multiple battery cells can be subjected to isostatic pressing in the isostatic chamber. During this process, the isostatic clamp can provide uniform constraint force to the battery cells undergoing isostatic pressing, thereby improving the pressure uniformity of the battery cells and thus improving their performance and stability.

[0021] In one embodiment, the limiting seat is connected to one side of the fixing seat along a third direction.

[0022] Connecting the limit seat to one side of the fixed seat along the third direction can reduce the probability of the limit seat moving relative to the fixed seat, and can also improve the overall integrity of the isostatic pressing fixture, making it easier to move or place the isostatic pressing fixture horizontally.

[0023] In one embodiment, the limiting seat is provided with a third opening that communicates with the second opening.

[0024] In this way, multiple isostatic clamps can be placed in a temperature isostatic pressing chamber, allowing multiple battery cells to undergo isostatic pressing treatment. During this process, the isostatic clamps provide uniform constraint force to the battery cells, thereby improving the pressure uniformity and ultimately enhancing the performance and stability of the battery cells. Furthermore, adjacent constraint spaces can be connected by a third opening, facilitating contact between the isostatic liquid and the battery cells within each constraint space.

[0025] In one embodiment, the limiting seat includes a base and a limiting member. Along a third direction, the base is positioned on the side of the second opening away from the first opening; the limiting member is connected to the base and is used to limit the movement of the battery cell along the second direction.

[0026] In this way, the movement of the battery cells along the second direction can be restricted by the limiting component, which can better position the battery cells on the fixed base, thereby improving the pressure uniformity of the battery cells.

[0027] According to a second aspect of this application, an isostatic pressing apparatus is provided, including the isostatic pressing clamp of any of the above embodiments.

[0028] According to a third aspect of this application, a battery production line is provided, including the isostatic pressing apparatus described above.

[0029] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0031] Figure 1 A schematic diagram of the isostatic pressure fixture according to an embodiment of this application is shown from one perspective.

[0032] Figure 2 A schematic diagram of the isostatic pressure fixture in one embodiment of this application is shown from another perspective.

[0033] Figure 3 A schematic diagram of the clamping member and battery cell in one embodiment of this application is shown.

[0034] Figure 4A schematic diagram of the clamping member in one embodiment of this application is shown.

[0035] Reference numerals: 10, isostatic clamp; 100, fixed base; 101, first mounting hole; 200, movable base; 201, second mounting hole; 300, elastic element; 400, guide element; 410, first guide element; 420, second guide element; 500, clamping element; 600, limiting base; 610, base body; 620, limiting element; 700, reinforcing element; Y, constraint space; R1, first accommodating space; R2, second accommodating space; R3, third accommodating space; X, limiting groove; K1, first opening; K2, second opening; K3, third opening; G, through hole; D, guide hole; 20, battery cell. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] Isostatic pressing technology is one of the key technologies for the fabrication of solid-state batteries. Isostatic pressing technology refers to the technique of improving the performance and stability of solid-state batteries by applying static pressure.

[0043] Isostatic clamps are typically used to hold individual battery cells and place them together in a warm isostatic chamber. However, during the isostatic pressing process of battery cells, the isostatic clamps in the relevant technologies may result in a lack of constraint on the battery cells, leading to uneven pressure on the solid-state battery.

[0044] Based on this, this application designs an isostatic pressing fixture, an isostatic pressing device, and a battery production line, which can adaptively adjust according to the volume change of the battery cell, thereby providing a uniform constraint force to the battery cell in the isostatic pressing process, thereby improving the pressure uniformity of the battery cell and thus improving the performance and stability of the battery cell.

[0045] The isostatic pressing fixtures, isostatic pressing devices, and / or battery production lines disclosed in this application can be used, but are not limited to, in the production of individual battery cells.

[0046] Figure 1 This illustration shows a schematic diagram of the isostatic pressing fixture 10 according to an embodiment of the present application from a certain perspective. Figure 2 A schematic diagram of the isostatic pressure fixture 10 in one embodiment of this application is shown from another perspective.

[0047] Please refer to the following: Figure 1 and Figure 2 One embodiment of this application provides an isostatic clamp 10 for clamping a battery cell 20. The isostatic clamp 10 includes a fixed base 100, a movable base 200, and an elastic member 300. The movable base 200 is opposite to and spaced apart from the fixed base 100 along a first direction F1, and the elastic member 300 is connected between the fixed base 100 and the movable base 200 along the first direction F1.

[0048] The battery cell 20 can be a solid-state battery cell.

[0049] The fixed seat 100 refers to the seat used for fixed installation on the isostatic clamp 10. It can be fixed manually, or it can be detachably fixed to the clamping equipment for easy operation of the movable seat 200.

[0050] The movable seat 200 refers to the seat on the isostatic clamp 10 that is movably set relative to the fixed seat 100 along the first direction F1.

[0051] The elastic element 300 refers to a flexible component connected between the fixed base 100 and the movable base 200. One or more elastic elements 300 may be provided, and no specific limitation is made here.

[0052] The elastic element 300 can be a tension spring, a spring or other elastic component.

[0053] The isostatic clamp 10 has a first state in which the elastic element 300 is in a stretched state and is used to define a constraint space Y between the fixed seat 100 and the movable seat 200 for placing at least one battery cell 20.

[0054] The first state refers to the state in which the isostatic clamp 10 holds at least one battery cell 20. The first state can be the clamping state of the isostatic clamp 10.

[0055] The stretched state refers to the state of the elastic element 300 when it is subjected to a certain tensile force. The elastic element 300 can be in a stretched state because at least one battery cell 20 is provided in the constrained space Y.

[0056] The constraint space Y refers to a space defined by the elastic member 300 in a stretched state, which defines a space between the fixed seat 100 and the movable seat 200, providing a certain constraint force to at least one battery cell 20.

[0057] It can be that the constraint space Y is used to place one battery cell 20; it can also be used to place multiple battery cells 20; or it can be used to place multiple battery cells 20 and at least one clamping member 500; no specific restrictions are made here.

[0058] When using the isostatic pressing fixture 10 of this application, the movable seat 200 can be moved along the first direction F1 away from the fixed seat 100, thereby stretching the elastic member 300. At least one battery cell 20 can be placed between the fixed seat 100 and the movable seat 200. Then, the movable seat 200 is slowly released, and the battery cell 20 is clamped by the movable seat 200 and the fixed seat 100. At this time, the elastic member 300 is in a stretched state (the isostatic pressing fixture 10 is in the first state), so that the isostatic pressing fixture 10 can provide a certain constraint force to the battery cell 20. In this way, during the isostatic pressing process of at least one battery cell 20, the elastic member 300 can be adaptively adjusted according to the thickness change of the battery cell 20, so that the isostatic pressing fixture 10 can provide a uniform constraint force to the battery cell 20 in the isostatic pressing process, thereby improving the pressure uniformity of the battery cell 20, and thus improving the performance and stability of the battery cell 20.

[0059] Furthermore, compared to the solution of replacing the movable seat 200 with a fixed layer, the isostatic clamp 10 of this application can increase the number of battery cells 20 loaded in the isostatic clamp 10 by setting the movable seat 200, thereby increasing the loading capacity of the isostatic clamp 10 and the utilization rate of the isostatic chamber.

[0060] The isostatic clamp 10 of this application can also adjust the number of battery cells 20 loaded in the isostatic clamp 10 according to the thickness of the battery cell 20, so that it can be applied to different models of battery cells 20.

[0061] In some embodiments, the isostatic clamp 10 includes a plurality of elastic elements 300, which are respectively located at opposite ends of the fixed base 100 or the movable base 200 along the second direction F2. The first direction F1 and the second direction F2 intersect each other.

[0062] Alternatively, the first direction F1 and the second direction F2 can be perpendicular to each other. Specifically, the first direction F1 is parallel to the direction in which the fixed base 100 and the movable base 200 are spaced apart from each other, and the second direction F2 is parallel to the width direction of the fixed base 100.

[0063] It is possible that multiple elastic elements 300 are arranged in two groups, and the two groups of elastic elements 300 are symmetrically arranged.

[0064] In this way, multiple elastic elements 300 can be used to improve the connection reliability between the movable seat 200 and the fixed seat 100, and also make it easier for the movable seat 200 to move more stably relative to the fixed seat 100 along the first direction F1.

[0065] In some embodiments, in the initial state of isostatic pressing, the plurality of elastic members 300 enable the constraint space Y to provide a constraint force greater than or equal to 9806.652N. After the warm isostatic pressing is completed, the thickness of the battery cell 20 is reduced by 20%, and the constraint space Y can still provide a constraint force greater than or equal to 1961.3304N.

[0066] In some embodiments, the elastic element 300 is detachably connected between the fixed base 100 and the movable base 200.

[0067] For example, the elastic element 300 has hooks at both ends, the fixed base 100 has a first mounting hole 101 for the hooks to pass through, and the movable base 200 has a second mounting hole 201 for the hooks to pass through. In this way, the hooks at both ends of the elastic element 300 can be passed through the first mounting hole 101 and the second mounting hole 201 respectively, which facilitates the installation of the elastic element 300.

[0068] In this way, it is convenient to install the elastic element 300 and also convenient to change the model of the elastic element 300, so as to select the appropriate model of elastic element 300 according to the constraint requirements of different models of battery cells 20, thereby meeting the production needs of more models of battery cells 20.

[0069] The isostatic clamp 10 of this application can adapt to battery cells 20 with a thickness of 7mm-15mm by changing the loading quantity of battery cells 20, without needing to change the model of the elastic element 300 to achieve compatibility.

[0070] When the thickness of the battery cell 20 exceeds the range of 7mm-15mm, the compatibility range of the isostatic clamp 10 can be changed by changing the model of the elastic element 300, so as to meet the production of more models of battery cells 20.

[0071] In some embodiments, the isostatic clamp 10 further includes a guide 400 connected to the fixed base 100, and the movable base 200 is slidably connected to the guide 400 along a first direction F1.

[0072] The guide component 400 can be a slide rod.

[0073] Alternatively, the guide member 400 can be a first guide member 410, and the movable seat 200 can be provided with a sleeve. The sleeve is slidably connected to the first guide member 410 along the first direction F1, thereby allowing the movable seat 200 to be slidably connected to the first guide member 410 along the first direction F1. A through hole G can be provided through the movable seat 200 for the first guide member 410 to pass through, and the sleeve is disposed inside the wall of the through hole G. The first guide member 410 passes through the sleeve in the first direction F1. During the downward movement of the movable seat 200 along the first direction F1, the first guide member 410 can pass through the through hole G, thereby facilitating the downward movement of the movable seat 200 along the first direction F1.

[0074] Alternatively, the guide member 400 can be a second guide member 420, and the movable seat 200 can be provided with a guide hole D for the second guide member 420 to pass through, so that the movable seat 200 is slidably connected to the guide member 400 along the first direction F1.

[0075] Alternatively, multiple guide members 400 may be provided, including a first guide member 410 and a second guide member 420.

[0076] In this way, the movable seat 200 can be oriented relative to the fixed seat 100 along the first direction F1, thereby improving the stability of the movable seat 200 moving along the first direction F1.

[0077] In some embodiments, the isostatic clamp 10 further includes at least one clamping member 500, which is disposed within the constraint space Y along the first direction F1.

[0078] Alternatively, a first receiving space R1 for placing the battery cell 20 may be defined between the clamp 500 and the fixing base 100.

[0079] Alternatively, a second receiving space R2 for placing the battery cell 20 can be defined between the clamp 500 and the movable seat 200.

[0080] Alternatively, the isostatic clamp 10 may also include at least two clamping members 500 spaced apart along the first direction F1; a third receiving space R3 for placing the battery cell 20 is defined between two adjacent clamping members 500.

[0081] Of course, it is also possible that the isostatic clamp 10 has at least two of the following: a first receiving space R1, a second receiving space R2, and a third receiving space R3.

[0082] For example, a first receiving space R1 for placing a battery cell 20 is defined between the clamping member 500 and the fixed base 100. A second receiving space R2 for placing a battery cell 20 is defined between the clamping member 500 and the movable base 200. The isostatic clamp 10 also includes at least two clamping members 500 spaced apart along a first direction F1; a third receiving space R3 for placing a battery cell 20 is defined between two adjacent clamping members 500. It can be understood that in this embodiment, the clamping members 500 and the battery cell 20 can be alternately arranged along the first direction F1 (e.g., ...). Figure 3 (As shown).

[0083] Clamping component 500 refers to a component used to clamp the battery cell 20. Clamping component 500 may be a clamping plate.

[0084] A suitable number of battery cells 20 can be arranged according to their model. The battery cells 20 can be placed in the first receiving space R1, the second receiving space R2, or the third receiving space R3. It can be understood that the battery cells 20 placed in the first receiving space R1, the second receiving space R2, and / or the third receiving space R3 are located in the constraint space Y. In this way, during the isostatic pressing process, the elastic element 300 can be adaptively adjusted according to the thickness change of the battery cell 20, so that the isostatic pressing fixture 10 can provide a uniform constraint force to the battery cell 20 during the isostatic pressing process, thereby improving the pressure uniformity of the battery cell 20 and thus improving the performance and stability of the battery cell 20.

[0085] In some embodiments, the clamping member 500 includes a porous structure.

[0086] The clamping member 500 can be configured as a porous structure. For example, the clamping member 500 is made of 3D printing material. In this way, a clamping member 500 with a porous structure can be made using 3D printing technology.

[0087] Since the clamping member 500 includes a porous structure, the pores in the clamping member 500 can be used to allow the isostatic liquid (oil) to permeate to the surface of the battery cell 20, so that an oil film is formed on the surface of the battery cell 20. The oil film is at the same pressure as the isostatic liquid (oil), so that the pressure can be uniformly transmitted to the surface of the battery cell 20, thereby making the battery cell 20 uniformly pressurized.

[0088] In some embodiments, the isostatic pressing fixture 10 further includes a limiting seat 600, which limits the fixed seat 100 and the movable seat 200 on the same side along the third direction F3. The clamping member 500 has a limiting groove X (e.g., [missing information]) adapted to the limiting seat 600 on the side along the third direction F3 near the limiting seat 600. Figure 4As shown), the clamping member 500 cooperates with the limiting seat 600 to restrict the movement of the clamping member 500 along the second direction F2. The first direction F1, the second direction F2 and the third direction F3 intersect each other.

[0089] The limiting seat 600 refers to the component used to limit the fixed seat 100 and the movable seat 200 to the third direction F3 side.

[0090] The limiting groove X may have two groove walls disposed opposite each other along the second direction F2, and at least a portion of the limiting seat 600 is limited between the two groove walls along the second direction F2, thereby limiting the movement of the clamping member 500 along the second direction F2.

[0091] It can be that the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other, wherein the second direction F2 is parallel to the width direction of the fixed base 100, and the third direction F3 is parallel to the length direction of the fixed base 100.

[0092] Since the clamping member 500 and the limiting seat 600 cooperate to limit the movement of the clamping member 500 along the second direction F2, the limiting groove X can be used to limit the movement of the clamping member 500 and the battery cell 20 along the second direction F2, thereby improving the reliability of the clamping member 500 and the battery cell 20 in the fixing seat 100, which is conducive to improving the pressure uniformity of the battery cell 20.

[0093] In some embodiments, a first opening K1 is defined between one end of the fixed seat 100 and the movable seat 200 along the third direction F3, and a second opening K2 is defined between the other end of the fixed seat 100 and the movable seat 200 along the third direction F3; the first opening K1 and the second opening K2 are respectively connected to the constraint space Y. The isostatic pressing fixture 10 also includes a limiting seat 600, which is located along the third direction F3 on the side of the second opening K2 away from the first opening K1.

[0094] It is possible that the limiting seat 600 has a bearing surface on the side of the fixed seat 100 along the third direction F3, and the bearing surface is in contact with the surface of the fixed seat 100 and the movable seat 200 on the side of the limiting seat 600 along the third direction F3.

[0095] The fixed seat 100 can be detachably mounted on the clamping device. At this point, the fixed seat 100 is positioned upwards on the side furthest from the clamping device along the first direction F1. Then, a robotic arm pulls the movable seat 200 upwards, placing the assembly of multiple battery cells 20 and the clamping member 500 between the fixed seat 100 and the movable seat 200. The limiting member 620 of the limiting seat 600 can also be engaged in the limiting groove X. Then, the movable seat 200 is slowly released. Thus, the hydrostatic clamp 10 can be used to clamp the battery cells 20 and provide a certain constraint force to them. This completes the assembly of multiple battery cells 20 and the clamping member 500. After the entire assembly of 00 is clamped, the fixed seat 100 can be removed from the clamping equipment; then the isostatic clamp 10 is placed in the isostatic chamber. At this time, the limiting seat 600 is set upward along the third direction F3 towards the fixed seat 100. The limiting seat 600 can support the fixed seat 100 and the movable seat 200. Multiple battery cells 20 can be subjected to isostatic pressing in the isostatic chamber. During this process, the isostatic clamp 10 can provide uniform constraint force to the battery cells 20 in the isostatic pressing process, thereby improving the pressure uniformity of the battery cells 20, and thus improving the performance and stability of the battery cells 20.

[0096] After the isostatic pressing of the battery cell 20 is completed, the isostatic pressing fixture 10 can be removed from the isostatic pressing chamber and fixed on the fixture clamping equipment to achieve the positioning and constraint fixation of the fixed seat 100; then a robot arm is used to pull the movable seat 200 upward; then the whole assembly consisting of multiple battery cells 20 and clamping parts 500 is pushed out; finally, the robot arm is lowered and the movable seat 200 falls to the initial position, thus completing the unloading of the battery cell 20.

[0097] In some embodiments, the limiting seat 600 is connected to the fixed seat 100 on one side along the third direction F3.

[0098] The limiting seat 600 can be welded to the fixed seat 100, or the limiting seat 600 can be connected to the fixed seat 100 by bolts; no specific restrictions are made here.

[0099] Connecting the limiting seat 600 to the fixed seat 100 along the third direction F3 can reduce the probability of the limiting seat 600 moving relative to the fixed seat 100, and can also improve the integrity of the isostatic pressing fixture 10, making it easier to move or adjust the placement direction of the isostatic pressing fixture 10.

[0100] In some embodiments, the limiting seat 600 is provided with a third opening K3 that communicates with the second opening K2.

[0101] In this way, multiple isostatic clamps 10 (each isostatic clamp 10 has a constraint space Y containing multiple battery cells 20 and a clamping element 500) can be placed in a temperature isostatic chamber. At this time, the limiting seat 600 is positioned upwards along the third direction F3, near the fixed seat 100. The limiting seat 600 can support the fixed seat 100 and the movable seat 200, allowing for isostatic pressing of multiple battery cells 20 within the temperature isostatic chamber. During this process, the isostatic clamps 10 provide uniform constraint force to the battery cells 20 undergoing isostatic pressing, thereby improving the uniformity of pressure on the battery cells 20 and thus enhancing their performance and stability. Furthermore, two adjacent constraint spaces Y can be connected through a third opening K3, facilitating contact between the isostatic liquid and the battery cells 20 within each constraint space Y.

[0102] In some embodiments, the limiting seat 600 includes a seat body 610 and a limiting member 620. Along a third direction F3, the seat body 610 is limited to the side of the second opening K2 away from the first opening K1. The limiting member 620 is connected to the seat body 610 and is used to limit the movement of the battery cell 20 along the second direction F2.

[0103] The seat 610 refers to the portion of the limiting seat 600 used to limit the second opening K2 to the side away from the first opening K1.

[0104] The limiting component 620 refers to the component used to limit the movement of the battery cell 20 along the second direction F2.

[0105] Alternatively, the third opening K3 may be located on the base 610, and the limiting member 620 may be located inside the third opening K3 and connected to the side wall of the third opening K3.

[0106] Alternatively, the clamping member 500 may have a limiting groove X adapted to the limiting member 620 on the side of the third direction F3 near the limiting seat 600. For example, the limiting member 620 has an arc-shaped wall on the side of the third direction F3 near the battery cell 20, and the limiting groove X is an arc-shaped groove adapted to the arc-shaped wall.

[0107] Alternatively, multiple limiting members 620 can be spaced apart along the second direction F2, and the multiple limiting members 620 can be divided into two groups. Along the second direction F2, the clamping member 500 is limited between the two groups of limiting members 620. In this way, the limiting members 620 can be used to restrict the movement of the clamping member 500 along the second direction F2, thereby restricting the movement of the battery cell 20 along the second direction F2.

[0108] In this way, the movement of the battery cell 20 along the second direction F2 can be restricted by the limiting member 620, so that the battery cell 20 and the like can be better positioned on the fixing seat 100, thereby improving the pressure uniformity of the battery cell 20.

[0109] In some embodiments, the rigidity of the fixing base 100 is greater than the rigidity of the clamping member 500.

[0110] It is possible that the volume of the fixed base 100 is greater than the volume of the clamping member 500, thereby making the rigidity of the fixed base 100 greater than the rigidity of the clamping member 500.

[0111] In some embodiments, the rigidity of the movable seat 200 is greater than the rigidity of the clamping member 500.

[0112] It is possible that the volume of the movable seat 200 is greater than the volume of the clamping member 500, thereby making the rigidity of the movable seat 200 greater than the rigidity of the clamping member 500.

[0113] This helps reduce the probability of deformation of the clamping component 500, thereby improving the pressure uniformity of the battery cell 20.

[0114] In some embodiments, the isostatic clamp 10 further includes a reinforcing member 700, and the limiting seat 600 is connected to the fixed seat 100 through the reinforcing member 700.

[0115] This can improve the reliability of the connection between the limit seat 600 and the fixed seat 100.

[0116] In some embodiments, the isostatic pressing fixture 10 includes a fixed base 100, a movable base 200, and an elastic member 300. The movable base 200 is disposed opposite to and spaced apart from the fixed base 100 along a first direction F1, and the elastic member 300 is connected between the fixed base 100 and the movable base 200 along the first direction F1. The isostatic pressing fixture 10 also includes at least one clamping member 500, which is disposed within the constraint space Y along the first direction F1.

[0117] Multiple battery cells 20 can be subjected to isostatic pressing in a temperature isostatic pressing chamber. During this process, the isostatic pressing fixture 10 can provide uniform constraint force to the battery cells 20 undergoing isostatic pressing, thereby improving the pressure uniformity of the battery cells 20 and thus improving the performance and stability of the battery cells 20.

[0118] An embodiment of this application also discloses an isostatic pressing device, including a temperature isostatic pressing chamber and an isostatic pressing fixture 10 of any of the above embodiments.

[0119] An embodiment of this application also discloses a battery production line, including the isostatic pressing device described above.

[0120] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0121] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An isostatic pressure fixture, characterized in that, The isostatic clamp is used to hold individual battery cells, and the isostatic clamp includes: Fixture (100); The movable seat (200) is positioned opposite and spaced apart from the fixed seat (100) along a first direction (F1); and An elastic element (300) is connected between the fixed seat (100) and the movable seat (200) along the first direction (F1); The isostatic clamp has a first state in which the elastic element (300) is in a stretched state and is used to define a constraint space (Y) between the fixed seat (100) and the movable seat (200) for placing at least one of the battery cells. The isostatic pressure fixture includes a plurality of elastic elements (300), which are respectively located at opposite ends of the fixed seat (100) or the movable seat (200) along the second direction (F2); The first direction (F1) and the second direction (F2) intersect each other.

2. The isostatic pressing fixture according to claim 1, characterized in that, The elastic element (300) is detachably connected between the fixed seat (100) and the movable seat (200).

3. The isostatic pressing fixture according to claim 1, characterized in that, The isostatic pressure fixture also includes a guide (400) connected to the fixed base (100). The movable seat (200) is slidably connected to the guide (400) along the first direction (F1).

4. The isostatic pressing fixture according to any one of claims 1-3, characterized in that, The isostatic pressing fixture further includes at least one clamping member (500), which is disposed within the constraint space (Y) along the first direction (F1). A first receiving space (R1) for placing the battery cell is defined between the clamping member (500) and the fixing base (100); and / or A second receiving space (R2) for placing the battery cell is defined between the clamp (500) and the movable seat (200).

5. The isostatic pressing fixture according to claim 4, characterized in that, The isostatic clamp further includes at least two clamping members (500) spaced apart along the first direction (F1); a third receiving space (R3) for placing the battery cell is defined between two adjacent clamping members (500).

6. The isostatic pressing fixture according to claim 4, characterized in that, The clamping member (500) includes a porous structure.

7. The isostatic pressing fixture according to claim 4, characterized in that, The isostatic pressure fixture also includes a limiting seat (600). The limiting seat (600) is located on the same side of the fixed seat (100) and the movable seat (200) along the third direction (F3); The clamping member (500) has a limiting groove (X) adapted to the limiting seat (600) on the side of the clamping member (500) close to the limiting seat (600) along the third direction (F3), and cooperates with the limiting seat (600) to limit the movement of the clamping member (500) along the second direction (F2); The first direction (F1), the second direction (F2), and the third direction (F3) intersect each other.

8. The isostatic pressing fixture according to any one of claims 1-3, characterized in that, A first opening (K1) is defined between one end of the fixed seat (100) and the movable seat (200) along the third direction (F3), and a second opening (K2) is defined between the other end of the fixed seat (100) and the movable seat (200) along the third direction (F3); the first opening (K1) and the second opening (K2) are respectively connected to the constraint space (Y); The isostatic clamp also includes a limiting seat (600) along the third direction (F3), the limiting seat (600) being located on the side of the second opening (K2) away from the first opening (K1).

9. The isostatic pressing fixture according to claim 8, characterized in that, The limiting seat (600) is connected to one side of the fixing seat (100) along the third direction (F3).

10. The isostatic pressing fixture according to claim 8, characterized in that, The limiting seat (600) is provided with a third opening (K3) that communicates with the second opening (K2).

11. The isostatic pressing fixture according to claim 8, characterized in that, The limiting seat (600) includes: A seat (610), along the third direction (F3), the seat (610) is located on the side of the second opening (K2) away from the first opening (K1); and A limiting member (620) is connected to the base (610) and is used to limit the movement of the battery cell along the second direction (F2).

12. An isostatic pressing device, characterized in that, Includes the isostatic clamp as described in any one of claims 1-11.

13. A battery production line, characterized in that, Includes the isostatic pressure device as described in claim 12.

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