Battery pressurizing device and battery production system

Abstract

The invention discloses a battery pressurizing device and a battery production system. The battery pressurizing device comprises a bearing mechanism, a plurality of pressurizing mechanisms and a plurality of brackets, the multiple pressurizing mechanisms are arranged on the bearing mechanism and arranged in the first direction. A bracket is arranged between every two adjacent pressurizing mechanisms, the brackets are detachably connected to the bearing mechanism and used for bearing the battery monomers, and the pressurizing mechanisms are used for extruding the battery monomers.

Description

Technical Field

[0001] The present application relates to the field of battery production, and in particular to a battery pressurizing device and a battery production system. Background Art

[0002] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0003] In some production processes of battery cells, the battery cells need to be pressurized. Therefore, there is an urgent need to provide a device capable of pressurizing the battery cells. Summary of the Invention

[0004] The present application provides a battery pressurizing device and a battery production system, which can pressurize battery cells and have good compatibility.

[0005] In a first aspect, the present application provides a battery pressurizing device comprising a supporting mechanism, multiple pressurizing mechanisms, and multiple brackets. The multiple pressurizing mechanisms are disposed on the supporting mechanism and arranged along a first direction. A bracket is disposed between adjacent pressurizing mechanisms. The bracket is detachably connected to the supporting mechanism and is used to support battery cells. The pressurizing mechanisms are used to compress the battery cells.

[0006] When it is necessary to pressurize the battery cells, multiple battery cells can be inserted between multiple pressurizing mechanisms, and the pressurizing mechanisms can squeeze the battery cells. By setting up multiple pressurizing mechanisms, the embodiments of the present application can provide multiple pressure application sites, thereby improving the uniformity of pressure on multiple battery cells. The bracket is detachably connected to the supporting mechanism for easy replacement. In this way, when the specifications of the battery cells change, the bracket can be replaced to match battery cells of different specifications, thereby shortening the replacement time, reducing the replacement cost, and improving the compatibility of the battery pressurization device.

[0007] In some embodiments, a accommodating chamber is provided within the pressurizing mechanism, and the accommodating chamber includes a flexible wall disposed on at least one side of the accommodating chamber along a first direction. The flexible wall is configured to deform and compress the battery cells when the accommodating chamber expands. In the first direction, at least a portion of the bracket overlaps with the flexible wall and defines a deformation region of the flexible wall.

[0008] The flexible wall has good elasticity. When the accommodating cavity increases, the flexible wall can deform quickly to transmit pressure to the battery cell. The volume of the battery cell will expand and contract during charging and discharging. The flexible wall can adaptively deform elastically according to the shape of the battery cell, thereby maintaining the pressure mechanism's compression of the battery cell surface, improving the uniformity of the force applied to the battery cell, and reducing the occurrence of extrusion blind spots. The bracket can limit the deformation area of ​​the flexible wall, so that the flexible wall compresses the set area of ​​the battery cell, reducing the risk of the flexible wall covering other areas of the battery cell, and thus reducing the risk of the battery cell shell being compressed and deformed.

[0009] In some embodiments, the accommodating chamber is configured to communicate with a fluid delivery mechanism, and the fluid delivery mechanism is configured to deliver fluid to the accommodating chamber.

[0010] The fluid delivery mechanism can fill the accommodating chamber with fluid, using the fluid's pressure to expand and deform the pressurizing mechanism, thereby causing it to apply pressure to the battery cells. The deformation of the pressurizing mechanism can be varied by adjusting the amount of fluid introduced. In other words, by adjusting the fluid input by the fluid delivery mechanism, the pressure applied by the pressurizing mechanism to the battery cells can be effectively controlled, thereby improving the reliability of the pressure.

[0011] In some embodiments, the accommodating cavity accommodates an expandable body, and the expandable body is configured to expand under a preset condition.

[0012] In the embodiments of the present application, the expansion of the expandable body can be used to expand and deform the pressurizing mechanism, thereby causing the pressurizing mechanism to apply pressure to the battery cell. By controlling the amount of expansion of the expandable body, the pressure applied by the pressurizing mechanism to the battery cell can be effectively controlled, thereby improving the reliability of the pressure.

[0013] In some embodiments, the bracket includes a bearing portion and two limiting portions, the two limiting portions are arranged opposite to each other along a second direction and connected to the bearing portion, the second direction is perpendicular to the first direction, and the two limiting portions are located on the side of the bearing portion facing the battery cell.

[0014] The bearing portion can support the battery cell, and the limiting portion can limit the battery cell from both sides, thereby improving the stability of the battery cell during the pressurization process.

[0015] In some embodiments, the bracket further includes a connecting portion, which is disposed on a side of the limiting portion away from the battery cell along the second direction, and is configured to be detachably connected to the supporting mechanism.

[0016] By providing the connecting portion, a detachable connection between the bracket and the supporting mechanism can be achieved, thereby limiting the movement of the bracket on the supporting mechanism, improving the stability of the battery cell during the pressurization process, and facilitating the unloading of the bracket.

[0017] In some embodiments, the support mechanism includes a support plate, two end plates, and a connecting rod. The two end plates are connected to the support plate and spaced apart along a first direction. The connecting rod connects the two end plates. A plurality of pressure mechanisms are located on one side of the support plate along a third direction perpendicular to the first and second directions and disposed between the two end plates. The connecting portion is connected to the connecting rod.

[0018] Connecting the two end plates with a connecting rod improves the structural strength of the load-bearing mechanism. Compared to solutions that use side plates to connect the two end plates, using a connecting rod can reduce weight. The connecting rod also limits the position of the bracket, improving the stability of the battery cell during pressurization.

[0019] In some embodiments, a slot is provided on a side of the connecting portion facing the carrier plate along the third direction, and at least a portion of the connecting rod is received in the slot. The bracket further includes a first protrusion provided on the retaining portion, the first protrusion being located on the side of the connecting portion facing the carrier plate; in the third direction, a portion of the connecting rod is located between the first protrusion and the connecting portion.

[0020] The portion of the connecting rod at least partially accommodated in the slot can limit the connection portion in the second direction. The first protrusion can stop the connecting rod in the third direction, thereby reducing the risk of the connecting rod coming out of the slot and improving the stability of the bracket.

[0021] In some embodiments, the limiting portion includes an elastic arm and an avoidance groove located inside the elastic arm, and the first protrusion protrudes from a surface of the elastic arm away from the avoidance groove.

[0022] The escape groove provides clearance for the elastic arm to swing, allowing it to move the first protrusion inward a certain distance. During assembly, the bracket can be inserted into the support mechanism along the third direction. When the connecting rod presses against the first protrusion, the elastic arm deforms toward the escape groove, allowing the first protrusion to clear the connecting rod. When the connecting rod enters the slot and reaches the set position, the elastic arm returns to its original shape, allowing the first protrusion to stop the connecting rod in the third direction. The provision of the elastic arm and the escape groove simplifies the assembly process of the battery pressurizing device.

[0023] In some embodiments, the supporting portion is provided with a first avoidance hole, the first avoidance hole penetrating the supporting portion along a third direction, the third direction being perpendicular to the first direction and the second direction. The first avoidance hole is used to avoid a lifting mechanism for lifting the battery cell.

[0024] After the battery cells have been processed, they need to be removed from the bracket. This embodiment of the application provides a first escape hole to facilitate an external lifting mechanism to lift the battery cells from the bottom, allowing the battery cells to be quickly removed from the bracket, improving efficiency. Furthermore, the first escape hole can also reduce weight and dissipate heat.

[0025] In some embodiments, the supporting mechanism includes a supporting plate, the supporting plate is located on a side of the supporting portion facing away from the battery cell, and the supporting plate is provided with a second avoidance hole, the second avoidance hole being used to expose the first avoidance hole.

[0026] The second avoidance hole can avoid the external jacking mechanism, reducing the risk of interference between the load-bearing plate and the external jacking mechanism, and facilitating the jacking mechanism to pass through the first avoidance hole and lift the battery cell.

[0027] In some embodiments, the retaining portion is provided with a heat dissipation hole extending through the retaining portion along the second direction. Providing heat dissipation holes in the retaining portion can improve the heat dissipation of the bracket and reduce the risk of thermal runaway of the battery cells during the formation process. Furthermore, providing heat dissipation holes can reduce the weight of the bracket.

[0028] In some embodiments, the bracket includes a plurality of sub-brackets arranged along a first direction, each sub-bracket including a sub-bearing portion and two sub-limiting portions, the two sub-limiting portions being arranged opposite each other along a second direction and connected to the sub-bearing portion. The bearing portion includes two sub-bearing portions, and each limiting portion includes two sub-limiting portions arranged along the first direction.

[0029] By adjusting the number of sub-brackets, battery cells of different thicknesses can be used, thereby improving the compatibility of the battery pressurizing device with different battery cells.

[0030] In some embodiments, the supporting mechanism includes a supporting plate, and the pressing mechanism and the bracket are located on one side of the supporting plate along a third direction, the third direction being perpendicular to the first direction and the second direction. In the third direction, the pressing mechanism abuts against the supporting plate, and at least a portion of the pressing mechanism is located between the bracket and the supporting plate.

[0031] During the process of removing the battery cell from the bracket, the bracket can limit the pressurizing mechanism in the third direction, reducing the range of movement of the pressurizing mechanism under the action of the friction between the battery cell and the pressurizing mechanism, reducing the risk of the pressurizing mechanism detaching from the supporting mechanism, and improving the reliability of the battery pressurizing device.

[0032] In some embodiments, the pressure mechanism is provided with a positioning recess at one end away from the carrier plate, the positioning recess being recessed relative to the surface of the pressure mechanism facing the bracket. The bracket includes a second protrusion provided on the limiting portion, at least a portion of the second protrusion being accommodated in the positioning recess.

[0033] The second protrusion can limit the pressing mechanism in the third direction, reducing the risk of the pressing mechanism detaching from the supporting mechanism and improving the reliability of the battery pressing device. By providing the positioning recess, the maximum dimension requirement of the bracket in the third direction can be reduced, reducing the volume and weight of the bracket.

[0034] In some embodiments, the surface of the pressurizing mechanism facing the bracket is provided with a plurality of positioning recesses, spaced apart along the second direction. Each positioning recess houses a second protrusion. The second protrusions extending into the plurality of positioning recesses can limit the pressurizing mechanism in the second direction, thereby improving the stability of the pressurizing mechanism.

[0035] In a second aspect, the present application provides a battery production system, which includes the battery pressurizing device provided by any embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0037] Figure 1 A schematic structural diagram of a battery pressurizing device provided in some embodiments of the present application;

[0038] Figure 2 for Figure 1 An enlarged schematic diagram at the circle;

[0039] Figure 3 A schematic structural diagram of a pressurizing mechanism and a bracket of a battery pressurizing device provided in some embodiments of the present application;

[0040] Figure 4 A schematic structural diagram of a pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application;

[0041] Figure 5 for Figure 4 A schematic cross-sectional view of the pressurizing mechanism shown;

[0042] Figure 6 for Figure 5 An enlarged schematic diagram at the circle;

[0043] Figure 7 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application;

[0044] Figure 8 for Figure 7 An enlarged schematic diagram at the circle;

[0045] Figure 9 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application;

[0046] Figure 10 for Figure 9 An enlarged schematic diagram at the circle;

[0047] Figure 11 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application;

[0048] Figure 12 for Figure 11 An enlarged schematic diagram at the circle;

[0049] Figure 13 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application;

[0050] Figure 14 for Figure 13 An enlarged schematic diagram at the circle;

[0051] Figure 15 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application;

[0052] Figure 16 for Figure 15 An enlarged schematic diagram at the circle;

[0053] Figure 17 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application;

[0054] Figure 18 for Figure 17 An enlarged schematic diagram at the circle;

[0055] Figure 19 A schematic structural diagram of a bracket for a battery pressurizing device provided in some embodiments of the present application;

[0056] Figure 20 for Figure 19 A schematic structural diagram of the sub-bracket shown;

[0057] Figure 21 A schematic structural diagram of a battery pressurizing device provided in some embodiments of the present application;

[0058] Figure 22 for Figure 21 An enlarged schematic diagram at the circle;

[0059] Figure 23 A schematic cross-sectional view of a battery pressurizing device provided in some embodiments of the present application;

[0060] Figure 24 for Figure 23 An enlarged schematic diagram at the circle;

[0061] Figure 25 for Figure 3 Enlarged diagram of the circle.

[0062] In the accompanying drawings, the drawings are not necessarily drawn to scale.

[0063] The reference numerals are as follows:

[0064] 1. Carrying mechanism; 11. Carrying plate; 111. Second avoidance hole; 12. End plate; 13. Connecting rod;

[0065] 2. Pressurizing mechanism; 21. Capsule; 211. Accommodating cavity; 212. Capsule opening; 213. Base plate; 213a. Positioning recess; 214. Flexible body; 215. Recess; 216. Accommodating hole; 21a. Flexible wall; 22. Valve body; 23. Expandable body; 24. Electrode connector; 25. Spacer;

[0066] 3. Bracket; 31. Carrying portion; 311. First avoidance hole; 32. Position limiting portion; 321. Elastic arm; 322. Avoidance groove; 323. Heat dissipation hole; 33. Accommodation groove; 34. Connecting portion; 341. Card slot; 35. First protrusion; 36. Second protrusion;

[0067] 4. Sub-bracket; 41. Sub-bearing portion; 411. Avoidance recess; 42. Sub-limiting portion; 421. Heat dissipation recess;

[0068] B. Battery cells;

[0069] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0070] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0071] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0072] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0073] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0074] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0075] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0076] The term "plurality" used in this application refers to two or more (including two).

[0077] With the advancement of battery technology, battery cells are being used in a growing number of fields and are gradually replacing traditional fossil fuels in the automotive powertrain sector. Battery cells store chemical energy and controllably convert it into electrical energy. In recyclable battery cells, after discharge, the active material can be activated by recharging for continued use.

[0078] The battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application.

[0079] The production process of battery cells generally includes processes such as stirring, coating, rolling, slitting, assembly and formation, and the formation process is an extremely important process, which has a vital impact on the cycle performance of the battery cell. The formation of a battery cell can refer to the first charge and discharge process of the battery cell after the battery cell is injected with liquid. For example, in a lithium-ion battery cell, the formation can activate the active material in the battery cell and activate the lithium-ion battery. At the same time, the lithium salt reacts with the electrolyte to form a solid electrolyte interface (SEI) film on the negative electrode side of the battery cell. This film can prevent the further occurrence of side reactions, thereby reducing the loss of active lithium in the battery cell. The quality of the SEI film has a great influence on the cycle life, initial capacity loss, rate performance, etc. of the battery cell.

[0080] During the formation process, gas will be generated inside the battery cell. If the gas cannot be discharged, it will affect the cycle performance of the battery cell. For example, lithium-ion battery cells will have problems such as lithium deposition on the interface. In addition, the gas will also cause the battery cell to expand and deform, resulting in the battery cell size specifications not meeting the standards.

[0081] Therefore, during the formation process, it is usually necessary to apply pressure to the battery cells to accelerate the discharge of gas, reduce the gas remaining inside the battery cells, and reduce the deformation of the battery cells, thereby improving the appearance yield of the battery cells.

[0082] Related art provides a battery pressurizing device that can pressurize battery cells. However, the battery pressurizing device can usually only pressurize battery cells of the same specification, resulting in poor compatibility; different battery cells require different battery pressurizing devices, which increases battery production costs.

[0083] In view of this, an embodiment of the present application provides a technical solution, which improves the compatibility of the battery pressurizing device with different battery cells and reduces the replacement cost by providing a bracket for carrying battery cells and adapting to different battery cells by replacing the bracket.

[0084] The battery pressurizing device disclosed in the embodiments of the present application can be applied to the battery formation process as well as other battery processes. For example, the battery pressurizing device of the embodiments of the present application can also be used in the liquid injection process. Specifically, in the liquid injection process, the liquid injection equipment injects electrolyte into the interior of the battery cell at high pressure and high speed, thereby increasing the internal pressure of the battery cell. The battery pressurizing device of the embodiments of the present application can apply pressure to the battery cell from the outside, offsetting the internal pressure of the battery cell and reducing deformation of the battery cell.

[0085] Of course, the battery pressurizing device of the embodiment of the present application can be used to pressurize battery cells, and can also be used to pressurize other parts to be pressurized during the battery production process.

[0086] Figure 1 A schematic structural diagram of a battery pressurizing device provided in some embodiments of the present application; Figure 2 for Figure 1 An enlarged schematic diagram at the circle; Figure 3 A schematic structural diagram of a pressurizing mechanism and a bracket of a battery pressurizing device provided in some embodiments of the present application; Figure 4 A schematic structural diagram of a pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application; Figure 5 for Figure 4 A schematic cross-sectional view of the pressurizing mechanism shown; Figure 6 for Figure 5 Enlarged diagram of the circle.

[0087] Reference Figures 1 to 6 The present invention provides a battery pressurizing device, comprising a supporting mechanism 1, a plurality of pressurizing mechanisms 2, and a plurality of brackets 3. The plurality of pressurizing mechanisms 2 are disposed on the supporting mechanism 1 and arranged along a first direction X. Brackets 3 are provided between adjacent pressurizing mechanisms 2. The brackets 3 are detachably connected to the supporting mechanism 1 and are used to support the battery cells B. The pressurizing mechanisms 2 are used to compress the battery cells B.

[0088] The battery pressurizing device can be used to apply pressure to a component to be pressurized. As an example, the following description will be made with the component to be pressurized being a battery cell B.

[0089] The supporting mechanism 1 can be used to support multiple pressurizing mechanisms 2 and multiple brackets 3. As an example, when a battery cell B needs to be pressurized, the supporting mechanism 1 can support the battery cell B via the bracket 3.

[0090] For example, the carrying mechanism 1 may include a pallet, which may be a flat pallet or a box pallet. The carrying mechanism 1 may be formed in one piece or assembled by splicing.

[0091] The material of the supporting mechanism 1 includes but is not limited to metal, plastic, inorganic non-metal or wood.

[0092] The pressurizing mechanism 2 is a component for applying pressure to the battery cells B.

[0093] All pressurizing mechanisms 2 of the battery pressurizing device can be arranged in a single row or in multiple rows. In some examples, all pressurizing mechanisms 2 of the battery pressurizing device are arranged in a single row along a first direction X. In other examples, the battery pressurizing device includes multiple pressurizing sequences, each pressurizing sequence including at least two pressurizing mechanisms 2 arranged along the first direction X, and the multiple pressurizing sequences are arranged along a second direction Y. Optionally, the first direction X is perpendicular to the second direction Y.

[0094] The multiple pressurizing mechanisms 2 may have the same structure or different structures, as long as the pressurizing mechanisms 2 can compress the battery cells B.

[0095] The pressure mechanism 2 is provided on the supporting mechanism 1. As an example, the pressure mechanism 2 can be detachably mounted on the supporting mechanism 1 or integrally provided on the supporting mechanism 1. The pressure mechanism 2 can be directly connected to the supporting mechanism 1 or constrained on the supporting mechanism 1 by other components.

[0096] As an example, the shape of the bracket 3 may be, but is not limited to, a U-shape, an L-shape or a straight line.

[0097] The material of the bracket 3 can be but is not limited to metal or plastic.

[0098] The bracket 3 may be fixed to the pressurizing mechanism 2 or may not be fixed to the pressurizing mechanism 2 .

[0099] In the embodiment of the present application, a bracket 3 may be provided between some adjacent pressurizing mechanisms 2 , or a bracket 3 may be provided between any two adjacent pressurizing mechanisms 2 .

[0100] In the embodiment of the present application, “a bracket 3 is provided between adjacent pressurizing mechanisms 2 ” means “a bracket 3 is provided between adjacent pressurizing mechanisms 2 in the first direction X”.

[0101] One bracket 3 may be provided between adjacent pressurizing mechanisms 2 , or two or more brackets 3 may be provided simultaneously.

[0102] One bracket 3 can carry one battery cell B or multiple battery cells B. Correspondingly, between two adjacent pressurizing mechanisms 2 , only one battery cell B can be inserted or two or more battery cells B can be inserted simultaneously.

[0103] As an example, a bracket 3 is provided between two adjacent pressing mechanisms 2 , and each bracket 3 carries one battery cell B. In the first direction X, adjacent battery cells B are separated by the pressing mechanisms 2 .

[0104] For example, when the battery cells B need to be pressurized, multiple battery cells B can be inserted between multiple pressurizing mechanisms 2 and placed on the bracket 3. In this way, each battery cell B is provided with a pressurizing mechanism 2 on both sides along the first direction X.

[0105] The pressurizing mechanism 2 can be set as needed to pressurize the battery cell B. For example, the pressurizing mechanism 2 can compress the battery cell by expanding itself, or it can clamp the battery cell B from both sides to apply pressure to the battery cell B.

[0106] The bracket 3 can be detachably connected to the supporting mechanism 1 by plugging, clamping, threading or other means.

[0107] When the battery cells B need to be pressurized, multiple battery cells B can be inserted between multiple pressurizing mechanisms 2, which can squeeze the battery cells B. By providing multiple pressurizing mechanisms 2, the embodiment of the present application can provide multiple pressurizing sites, thereby improving the uniformity of the pressurization of the multiple battery cells B.

[0108] The provision of bracket 3 improves the compatibility of the battery pressurization device with different battery cells B. For example, if the battery cell B is large, it can be placed directly between two adjacent pressurization mechanisms 2 and supported by the support mechanism 1. If the battery cell B is smaller, the bracket 3 can be used to support the battery cell B, placed between two adjacent pressurization mechanisms 2. The bracket 3 not only limits the position of the battery cell B, limiting its range of movement, but also elevates and supports the battery cell B, allowing the battery cell B to better align with the pressurization mechanisms 2, facilitating the restraint and pressurization of the battery cell B by the pressurization mechanisms 2.

[0109] The bracket 3 is detachably connected to the supporting mechanism 1 for easy replacement. In this way, when the specifications of the battery cells B change, the bracket 3 can be replaced to match the battery cells B of different specifications, thereby shortening the replacement time, reducing the replacement cost, and improving the compatibility of the battery pressurizing device.

[0110] In some embodiments, the pressurizing mechanism 2 is configured to compress the battery cells B by expansion.

[0111] The pressurizing mechanism 2 can expand under certain conditions, for example, the pressurizing mechanism 2 can expand under power, heating, gas filling, liquid filling or other conditions. The pressurizing mechanism 2 can squeeze the battery cell B when it expands and deforms.

[0112] When it is necessary to pressurize the battery cells B, multiple battery cells B can be inserted between multiple pressurizing mechanisms 2. By applying external force to the pressurizing mechanism 2, the pressurizing mechanism 2 is expanded and squeezes the battery cells B. The embodiment of the present application can provide multiple pressurizing sites by setting up multiple pressurizing mechanisms 2, thereby improving the uniformity of the pressure on multiple battery cells B; the battery cells B are inserted between the pressurizing mechanisms 2, and the offset of the battery cells B will be limited by the pressurizing mechanisms 2 on both sides. Therefore, the embodiment of the present application can also reduce the offset of the battery cells B when pressurized, and reduce the risk of misalignment between the battery cells B and other components. The pressure applied by the pressurizing mechanism 2 to the battery cells B is related to the amount of expansion. The amount of expansion of the pressurizing mechanism 2 can effectively control the pressure applied by the pressurizing mechanism 2 to the battery cells B, thereby achieving controllability of the pressure and reducing the risk of electrolyte overflow due to excessive pressure.

[0113] In some embodiments, the expansion deformation of the pressurizing mechanism 2 is an elastically recoverable deformation.

[0114] In some embodiments, the battery pressurizing device may be used in a battery formation process to squeeze out gas inside the battery cell B during the formation process.

[0115] In some embodiments, the battery pressurizing device may be used in the battery filling process to offset the positive pressure applied by the filling equipment to the interior of the battery cell B during the filling process, thereby reducing deformation of the outer shell of the battery cell B.

[0116] In some embodiments, after the pressurization process is completed, the pressurization mechanism 2 returns to its original state. In this case, the battery pressurization device of the embodiment of the present application can also be used as a conventional tray for carrying battery cells B.

[0117] In some embodiments, the battery pressurizing device can also be used in scenarios where battery cells B are subjected to long-term charge and discharge cycles. In these scenarios, the pressurizing mechanism 2 pressurizes the battery cells B, causing the positive and negative electrodes of the battery cells B to fit tightly with the separator, thereby improving the uniformity of the interface reaction and extending the battery's service life.

[0118] In some embodiments, the supporting mechanism 1 includes a supporting plate 11 and two end plates 12 . The two end plates 12 are connected to the supporting plate 11 and are spaced apart along the first direction X.

[0119] The plurality of pressurizing mechanisms 2 and the plurality of brackets 3 may be disposed on the same side of the carrier plate 11 along the third direction Z. Optionally, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The carrier plate 11 may be used to support the plurality of pressurizing mechanisms 2 and the plurality of brackets 3 .

[0120] The plurality of pressurizing mechanisms 2 are located between the two end plates 12 along the first direction X. The two end plates 12 can limit the plurality of pressurizing mechanisms 2 and the plurality of battery cells B in the first direction X.

[0121] In some embodiments, the support mechanism 1 further includes a connecting rod 13 that connects the two end plates 12 to improve the overall structural strength of the support mechanism 1 and reduce the risk of the end plates 12 being disconnected from the support plate 11 when under pressure. Alternatively, the support mechanism 1 may include side plates instead of the connecting rod 13.

[0122] In some embodiments, the battery pressurizing device includes two pressurizing sequences, and the two pressurizing sequences are arranged between the two end plates 12 .

[0123] In some embodiments, a connecting rod 13 is provided between the two pressurizing sequences.

[0124] In some embodiments, the pressurizing mechanism 2 is provided with a housing chamber 211, and the walls of the housing chamber 211 include a flexible wall 21a disposed on at least one side of the housing chamber 211 along the first direction X. The flexible wall 21a is configured to deform and compress the battery cell B when the housing chamber 211 expands. In the first direction X, at least a portion of the bracket 3 overlaps with the flexible wall 21a and defines a deformation region of the flexible wall 21a.

[0125] The pressurizing mechanism 2 may be provided with one accommodating cavity 211 , or may be provided with a plurality of accommodating cavities arranged along the first direction X.

[0126] The flexible wall 21 a may be provided on only one side of the accommodating cavity 211 along the first direction X, or may be provided on both sides of the accommodating cavity 211 along the first direction X.

[0127] The flexible wall 21a has good elasticity. When the accommodating cavity 211 increases, the flexible wall 21a can deform quickly to transmit pressure to the battery cell B. When the battery cell B is charging and discharging, the volume of the battery cell B will expand and contract. The flexible wall 21a can adaptively deform elastically according to the shape of the battery cell B, thereby maintaining the pressure of the pressure mechanism 1 on the surface of the battery cell B, improving the uniformity of the force applied to the battery cell B, and reducing the occurrence of extrusion dead angles. The bracket 3 can limit the deformation area of ​​the flexible wall 21a so that the flexible wall 21a squeezes the set area of ​​the battery cell B, reducing the risk of the flexible wall 21a covering other areas of the battery cell B, and thereby reducing the risk of the outer shell of the battery cell B being compressed and deformed.

[0128] In some embodiments, the accommodating chamber 211 is used to communicate with a fluid delivery mechanism, and the fluid delivery mechanism is used to deliver fluid to the accommodating chamber 211 .

[0129] The accommodating chamber 211 is used to accommodate a fluid. The fluid may refer to a medium that is fluid at room temperature, such as a gaseous medium or a liquid medium. For example, the gaseous medium may be a medium that is gaseous at room temperature, such as air, an inert gas, or nitrogen. For example, the liquid medium may be a medium that is liquid at room temperature, such as water or oil.

[0130] When it is necessary to pressurize the battery cell B, the pressurizing mechanism 2 can be connected to the fluid delivery mechanism. The fluid delivery mechanism can be directly connected to the pressurizing mechanism 2 to communicate with the accommodating chamber 211; alternatively, the fluid delivery mechanism can be indirectly connected to the pressurizing mechanism 2 via another component to communicate with the accommodating chamber 211 through the component.

[0131] The accommodating chambers 211 of the multiple pressurizing mechanisms 2 may be in communication with the same fluid delivery mechanism or may be in communication with different fluid delivery mechanisms.

[0132] The fluid delivery mechanism may only input fluid into the accommodating chamber 211. Alternatively, the fluid delivery mechanism may both input fluid into the accommodating chamber 211 and extract the fluid from the accommodating chamber 211.

[0133] The fluid delivery mechanism can fill the accommodating chamber 211 with fluid, using the fluid pressure to expand and deform the pressurizing mechanism 2, thereby causing the pressurizing mechanism 2 to apply pressure to the battery cell B. The deformation of the pressurizing mechanism 2 can be varied by adjusting the amount of fluid filled. In other words, by adjusting the fluid input by the fluid delivery mechanism, the pressure applied by the pressurizing mechanism 2 on the battery cell B can be effectively controlled, thereby improving the reliability of the pressure.

[0134] The method of using fluid pressurization is simple, easy to operate and low-cost; in addition, fluid pressurization involves fewer equipment, which can reduce the floor area and save plant layout space.

[0135] In some embodiments, the fluid delivery mechanism includes a tube connected to a fluid source.

[0136] In some embodiments, the pressurizing mechanism 2 includes a capsule 21 , and a receiving cavity 211 is provided inside the capsule 21 . The capsule 21 includes a flexible wall 21 a for squeezing the battery cell B.

[0137] The pressurizing mechanism 2 may include one or more capsules 21. In some examples, the pressurizing mechanism 2 includes one capsule 21, and flexible walls 21a are provided on both sides of the accommodating cavity 211 along the first direction. In this case, the capsule 21 can apply pressure to the battery cells B located on both sides of the capsule 21. In other examples, the pressurizing mechanism 2 may include multiple capsules 21 arranged along the first direction X, such as two capsules 21.

[0138] The capsule 21 can be formed in one piece or assembled from multiple parts.

[0139] For example, when the fluid provided by the fluid delivery mechanism is gas, the capsule 21 may be referred to as an air capsule; when the fluid provided by the fluid delivery mechanism is liquid, the capsule 21 may be referred to as a liquid capsule.

[0140] In some embodiments, the capsule 21 may be a flexible container. The capsule 21 may be a structure that is entirely flexible or partially flexible.

[0141] In some embodiments, the capsule body 21 further includes a capsule opening 212 connected to the accommodating cavity 211 , and the pressurizing mechanism 2 further includes a valve body 22 installed at the capsule opening 212 , and the valve body 22 is used to connect with the fluid delivery mechanism.

[0142] The sac opening 212 may be a channel for fluid to pass through, including but not limited to a through hole.

[0143] The bladder 21 may have a single opening 212 or multiple openings 212. Optionally, the bladder 21 has a single opening 212. This single opening 212 can simplify the structure of the bladder 21 while ensuring fluid circulation, thereby improving the reliability of the bladder 21. Optionally, the bladder 21 may have multiple openings 212. These multiple openings 212 can rapidly fill or drain the accommodating cavity 211, increasing the rate of change in the volume of the bladder 21.

[0144] When using the battery pressurizing device, when the amount of fluid in the accommodating cavity 211 is relatively low, the battery cell B is first inserted between two adjacent bladder bodies 21. Then, the accommodating cavity 211 is filled with fluid through the valve body 22 and the bladder opening 212, causing the bladder body 21 to expand and increase in volume, thereby applying pressure to the battery cell B. After processing the battery cell B, the fluid in the accommodating cavity 211 can be discharged through the valve body 22 and the bladder opening 212, causing the bladder body 21 to shrink and decrease in volume, releasing the pressure of the flexible wall 21a on the battery cell B. The battery cell B can then be removed from between the two adjacent bladder bodies 21.

[0145] By opening a sac opening 212 and installing a valve body 22 in the sac body 21, the amount of fluid medium filled in the accommodating chamber 211 can be adjusted, thereby changing the volume of the sac body 21. In this way, when using the battery pressurizing device, the sac opening 212 and the valve body 22 can be used to fill the accommodating chamber 211 with fluid medium only when the battery cell B needs to be squeezed. When loading and unloading the battery cell B, the accommodating chamber 211 is kept empty or filled with a small amount of fluid medium, thereby facilitating the removal and placement of the battery cell B. In addition, the sac opening 212 and the valve body 22 can also be used to adjust the amount of fluid filled in the accommodating chamber 211, thereby adjusting the squeezing force of the flexible wall 21a on the battery cell B, reducing the appearance of the battery cell B, such as the denting of the outer shell of the battery cell B, due to excessive force on the battery cell B, or reducing the appearance of the battery cell B, such as the denting of the outer shell of the battery cell B, due to insufficient force, or reducing the appearance of the battery cell B, such as the denting of the outer shell of the battery cell B, and reducing the appearance of the battery cell B, such as the denting of the outer shell of the battery cell B, due to insufficient force.

[0146] Since the sac body 21 can adaptively deform according to the surface shape of the battery cell B, and the amount of fluid filled in the accommodating cavity 211 can be adjusted through the sac opening 212 and the valve body 22, the compatibility of the battery pressurizing device with the thickness, shape, and group margin of the battery cell B is improved, and the uniformity of the force applied to the battery cell B is improved.

[0147] In some embodiments, the valve body 22 can be an air valve that can be inflated or exhausted. In other embodiments, the valve body 22 can be a liquid valve that can be inflated or exhausted.

[0148] In some embodiments, the capsule 21 includes a substrate 213 and a flexible body 214 connected to the substrate 213. The elastic modulus of the substrate 213 is greater than that of the flexible body 214. The flexible body 214 is used to squeeze the battery cell B. The substrate 213 and the flexible body 214 enclose a receiving cavity 211. The flexible body 214 includes a flexible wall 21a.

[0149] The material of the substrate 213 may be, but is not limited to, metal, plastic, inorganic non-metal, or wood, etc. The material of the flexible body 214 may be, but is not limited to, silicone, cowhide, rubber, or latex, etc.

[0150] The flexible body 214 is a deformable component that is difficult for fluid media to pass through.

[0151] The flexible body 214 has good elasticity. When the internal pressure in the accommodating chamber 211 increases, the flexible body 214 can deform rapidly to transmit the pressure to the battery cell B. The base plate 213 is strong and resistant to deformation, which helps achieve directional deformation of the pressurizing mechanism 2 and increases the rate of increase in the internal pressure in the accommodating chamber 211. When the flexible body 214 wears, it can be replaced, thereby reducing the maintenance cost of the battery pressurizing device.

[0152] In some embodiments, the sac opening 212 is disposed on a base plate 213, and the valve body 22 is mounted on the base plate 213. The base plate 213 has high strength, and when the internal pressure of the accommodating cavity 211 increases, the sac opening 212 is less deformed, thereby reducing the risk of sealing failure at the connection between the sac opening 212 and the valve body 22.

[0153] In some embodiments, the substrate 213 is made of at least one of metal and plastic.

[0154] Optionally, the substrate 213 is made of metal, including but not limited to aluminum, aluminum alloy, stainless steel, nickel-plated steel, and the like.

[0155] Optionally, the material of the substrate 213 may include any type of high-temperature-resistant and non-deformable engineering plastics, such as polyimide, polyphenylene ether resin, and polyetheretherketone.

[0156] Optionally, the material of the substrate 213 may include general plastic with good mechanical strength, such as polypropylene or polyethylene.

[0157] Metals and plastics are easy to process and obtain, which helps to reduce costs.

[0158] In some embodiments, the flexible body 214 is made of an elastic material. Elastic materials are easy to expand and deform, and the deformation can be restored. The flexible body 214 is made of an elastic material and can be used multiple times, thereby increasing the service life of the battery pressurizing device.

[0159] In some embodiments, the flexible body 214 is made of rubber. Alternatively, the flexible body 214 is made of at least one of silicone and ethylene propylene rubber. Alternatively, the ethylene propylene rubber includes EPDM. These structural materials are readily available, easy to process, and relatively inexpensive, thus saving costs. They also have stable structures and can be used in multiple processes.

[0160] In some embodiments, the flexible body 214 may be connected to the substrate 213 by bonding, welding, clamping or other methods.

[0161] In some embodiments, the flexible body 214 is bonded to the substrate 213. In some examples, the flexible body 214 is bonded to the substrate 213 using an adhesive. In other examples, the flexible body 214 is bonded to the substrate 213 using a lamination process or a vulcanization process. The bonding process is easy to implement and helps achieve a seal, reducing the risk of air leakage.

[0162] In some embodiments, a concave portion 215 is defined on one side of the substrate 213 along the first direction X. The flexible body 214 covers the concave portion 215 to form a receiving cavity 211 .

[0163] In some examples, the substrate 213 is provided with a recess 215 only on one side of the first direction X, and the pressurizing mechanism 2 includes a flexible body 214; in other examples, the substrate 213 is provided with recesses 215 on both sides along the first direction X, and the pressurizing mechanism 2 includes two flexible bodies 214, which respectively cover the two recesses 215 and form two accommodating cavities 211.

[0164] The stronger substrate 213 can serve as a skeleton to support and shape the flexible body 214, allowing the flexible body 214 to remain open and stretched, thereby better contacting and squeezing the battery cell B. In addition, the stronger substrate 213 can also protect the flexible body 214 during installation, reducing the risk of damage to the flexible body 214.

[0165] In some embodiments, the flexible body 214 is accommodated in the recess 215, and the outer surface of the flexible body 214 is flush with the outer surface of the substrate 213 where the recess 215 is formed. The flexible body 214 is the flexible wall 21a.

[0166] The embodiment of the present application can reduce the space occupied by the capsule 21. In addition, when the battery cell B is inserted between the pressurizing mechanism 2, the embodiment of the present application can reduce the risk of the battery cell B rubbing against the flexible body 214, reduce the wear of the flexible body 214, and increase the service life of the battery pressurizing device.

[0167] In some alternative embodiments, the flexible body 214 is entirely located outside the recess 215 and attached to the outer surface of the substrate 213. The flexible wall 21a is a portion of the flexible body 214 corresponding to the recess 215.

[0168] The flexible body 214 can have a larger area. Attaching the flexible body 214 to the outer surface of the substrate 213 can increase the connection area between the flexible body 214 and the substrate 213, improve the connection strength between the flexible body 214 and the substrate 213, reduce the risk of separation of the flexible body 214 and the substrate 213 under the action of internal pressure, and extend the service life of the battery pressurizing device.

[0169] In some embodiments, the recess 215 is provided on only one side of the substrate 213 along the first direction X. The at least one pressurizing mechanism 2 includes two capsules 21 arranged along the first direction X. The recesses 215 of the substrates 213 of the two capsules 21 are disposed opposite to each other along the first direction X.

[0170] Correspondingly, only one side of the bladder 21 is provided with the flexible body 214. The bladder 21 with the flexible body 214 provided on only one side can be called a single-sided bladder.

[0171] The two capsules 21 of the pressurizing mechanism 2 can apply pressure to the two battery cells B respectively; the flexible bodies 214 of the two capsules 21 are arranged back to back, so the two capsules 21 expand in opposite directions, which can reduce the influence of the two capsules 21 on each other's expansion and improve the uniformity of the pressure on the battery cells B.

[0172] In some embodiments, among the plurality of pressurizing mechanisms 2 arranged along the first direction X, the pressurizing mechanisms 2 at the ends may include only one single-sided bladder, and the pressurizing mechanisms 2 at the middle may include two single-sided bladders.

[0173] In some embodiments, the two capsules 21 of the pressurizing mechanism 2 can be independently provided (for example, they are simply stacked along the first direction X), or they can be fixedly connected (for example, they are bonded together).

[0174] Figure 7 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application; Figure 8 for Figure 7 Enlarged diagram of the circle.

[0175] Reference Figure 7 and Figure 8 In some embodiments, the accommodating cavity 211 accommodates an expandable body 23 , and the expandable body 23 is configured to expand under preset conditions.

[0176] For example, the preset conditions may vary according to different design requirements. For example, the preset conditions may depend on the material of the expandable body 23 .

[0177] Exemplarily, the preset condition may include at least one of temperature, voltage, light, or water.

[0178] In the embodiment of the present application, the expansion of the expandable body 23 can be used to expand and deform the pressurizing mechanism 2, thereby causing the pressurizing mechanism 2 to apply pressure to the battery cell B. By controlling the expansion amount of the expandable body 23, the pressure applied by the pressurizing mechanism 2 to the battery cell B can be effectively controlled, thereby improving the reliability of the pressure.

[0179] In some embodiments, the expandable body 23 is configured to expand upon application of a voltage or upon application of heat.

[0180] The expandable body 23 may expand only when a voltage is applied, may expand only when heated, or may expand when a voltage and heat are applied simultaneously.

[0181] The electrification and heating are easy to implement and control, which helps to simplify the structure of the battery pressurizing device.

[0182] In some embodiments, the expandable body 23 comprises a charge-deformable material that expands when charged and recovers or contracts when de-energized.

[0183] In some embodiments, the expandable body 23 includes at least one of a piezoelectric ceramic and a phase change material.

[0184] Piezoelectric ceramics can deform in response to electrical signals. Applying voltage to the piezoelectric ceramics can cause them to expand, which in turn causes the pressurizing mechanism 2 to expand. After power is removed, the piezoelectric ceramics can return to their original shape.

[0185] When a material undergoes a phase change, its volume generally also changes. By changing the temperature, the phase change material can be controlled to undergo a phase change, thereby achieving expansion and contraction of the pressurizing mechanism 2.

[0186] In some embodiments, the pressurizing mechanism 2 includes a bladder 21 having an accommodating cavity 211 therein. The bladder 21 is filled with an expandable body 23. The bladder 21 includes a flexible wall 21a for squeezing the battery cell B.

[0187] In some embodiments, the pressurizing mechanism 2 further includes an electrode connector 24 mounted on the balloon 21 , and the electrode connector 24 is electrically connected to the expandable body 23 .

[0188] The electrode connector 24 facilitates application of voltage to the expandable body 23, thereby controlling the expansion and contraction of the expandable body 23. Using voltage as a trigger for the expansion of the expandable body 23 improves control accuracy and speed, and simplifies the battery pressurization device.

[0189] In other embodiments, a heating plate (not shown) is provided inside the pressurizing mechanism 2, and the electrode connector 24 is electrically connected to the heating plate. The heating plate can heat the expandable body 23 and also expand the expandable body 23.

[0190] In some embodiments, the bladder 21 includes a base plate 213 and a flexible body 214 connected to the base plate 213. The base plate 213 has a greater elastic modulus than the flexible body 214, and the flexible body 214 is used to compress the battery cell B. The base plate 213 and the flexible body 214 enclose a receiving cavity 211. The expandable body 23 is received in the receiving cavity 211. The flexible body 214 includes a flexible wall 21a.

[0191] Figure 9 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application; Figure 10 for Figure 9 Enlarged diagram of the circle.

[0192] like Figure 9 and Figure 10 As shown, in some embodiments, at least one pressurizing mechanism 2 further includes a partition 25 disposed between the two bladders 21 .

[0193] The partition 25 can be a component for separating the two capsules 21. The material of the partition 25 can be but not limited to plastic, aluminum, etc.

[0194] By disposing a separator 25 between the two bladders 21, the thickness of the pressurizing mechanism 2 can be further adjusted to accommodate thinner battery cells B. Furthermore, since the separator 25 is sandwiched between the bladders 21, the thickness of the pressurizing mechanism 2 can be adjusted by removing or replacing the separator 25, thereby improving the compatibility of the battery pressurizing device with battery cells B of varying thicknesses.

[0195] Figure 11 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application; Figure 12 for Figure 11 Enlarged diagram of the circle.

[0196] like Figure 11 and Figure 12 As shown, in some embodiments, a recess 215 is provided on both sides of the substrate 213 along the first direction X. There are two flexible bodies 214, and the two flexible bodies 214 are provided corresponding to the two recesses 215. The flexible body 214 includes two flexible walls, and correspondingly, there are two flexible walls.

[0197] Two flexible bodies 214 cover the two recesses 215, respectively, to form two accommodating chambers 211. A single bladder 21 can simultaneously apply pressure to battery cells B on both sides, reducing the number of bladders 21 in the pressurizing mechanism 2 and simplifying its structure. A base plate 213 separates the two accommodating chambers 211, allowing independent control of the internal pressures of the two accommodating chambers 211.

[0198] For example, both sides of the bladder 21 can apply pressure to the battery cell B. Such a bladder 21 that can apply pressure on both sides can be called a double-sided bladder.

[0199] In some embodiments, the flexible body 214 may be deformed by inputting fluid into the accommodating cavity 211 , or by adding an expandable body into the accommodating cavity 211 .

[0200] Figure 13 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application; Figure 14 for Figure 13 Enlarged diagram of the circle.

[0201] like Figure 13 and Figure 14 As shown, in some embodiments, the capsule 21 includes a substrate 213 and a flexible body 214 connected to the substrate 213. The elastic modulus of the substrate 213 is greater than the elastic modulus of the flexible body 214. The flexible body 214 is used to squeeze the battery cell B. The flexible body 214 forms a receiving cavity 211 inside. A portion of the flexible body 214 serves as a flexible wall.

[0202] The flexible body 214 has good elasticity. When the internal pressure of the accommodating cavity 211 increases, the flexible body 214 can deform rapidly to transmit the pressure to the battery cell B. The base plate 213 has great strength and is not easily deformed. This helps achieve directional deformation of the pressurizing mechanism 2 and increases the rate of increase in the internal pressure of the accommodating cavity 211. The accommodating cavity 211 is formed entirely within the flexible body 214, which can improve the sealing performance.

[0203] In some embodiments, a recess 215 is defined on one side of the substrate 213 along the first direction X. At least a portion of the flexible body 214 is received in the recess 215 , and a receiving cavity 211 is formed inside the flexible body 214 .

[0204] For example, a portion of the flexible body 214 away from the bottom wall of the recess 215 may be the flexible wall 21 a .

[0205] In some examples, the substrate 213 is provided with a recess 215 only on one side of the first direction X, and the pressurizing mechanism 2 includes a flexible body 214; in other examples, the substrate 213 is provided with recesses 215 on both sides along the second direction Y, and the pressurizing mechanism 2 includes two flexible bodies 214, and the two flexible bodies 214 are respectively provided corresponding to the two recesses 215.

[0206] The strong substrate 213 can serve as a skeleton to support and shape the flexible body 214, so that the flexible body 214 can better contact and squeeze the battery cell B. In addition, the strong substrate 213 can also protect the flexible body 214 during installation, reducing the risk of damage to the flexible body 214.

[0207] In some embodiments, the recess 215 is provided on only one side of the substrate 213 along the first direction X. The at least one pressurizing mechanism 2 includes two capsules 21 arranged along the first direction X. The recesses 215 of the substrates 213 of the two capsules 21 are disposed opposite to each other along the first direction X.

[0208] Figure 15 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application; Figure 16 for Figure 15 Enlarged diagram of the circle.

[0209] like Figure 15 and Figure 16 As shown, in some embodiments, the substrate 213 is provided with a receiving hole 216, which passes through the receiving hole 216 along the first direction X. The capsule 21 includes two flexible bodies 214, which cover the receiving hole 216 from both sides and form a receiving cavity 211. Each flexible body 214 includes a flexible wall.

[0210] One capsule 21 can apply pressure to the battery cells B on both sides at the same time, which can reduce the number of capsules 21 of the pressurizing mechanism 2; the two flexible bodies 214 are located on both sides of the same accommodating cavity 211, that is, the expansion of one accommodating cavity 211 will drive the deformation of the two flexible bodies 214, which can simplify the structure of the pressurizing mechanism 2 (for example, saving the valve body 22 or the electrode connector 24).

[0211] Figure 17 A schematic cross-sectional view of a pressurizing mechanism provided in another embodiment of the present application; Figure 18 for Figure 17 Enlarged diagram of the circle.

[0212] like Figure 17 and Figure 18 As shown, in some embodiments, the substrate 213 is provided with a receiving hole 216 , which passes through the receiving hole 216 along the first direction X. At least a portion of the flexible body 214 is received in the receiving hole 216 , and a receiving cavity 211 is formed inside the flexible body 214 .

[0213] The flexible body 214 includes two flexible walls, which are respectively located on two sides of the accommodating cavity 211 along the first direction X.

[0214] One flexible body 214 can apply pressure to the battery cells B on both sides at the same time, which can reduce the number of capsules 21 of the pressurizing mechanism 2 and simplify the structure.

[0215] Figure 19 A schematic structural diagram of a bracket for a battery pressurizing device provided in some embodiments of the present application; Figure 20 for Figure 19A schematic structural diagram of the sub-bracket shown; Figure 21 A schematic structural diagram of a battery pressurizing device provided in some embodiments of the present application; Figure 22 for Figure 21 An enlarged schematic diagram at the circle; Figure 23 A schematic cross-sectional view of a battery pressurizing device provided in some embodiments of the present application; Figure 24 for Figure 23 An enlarged schematic diagram at the circle; Figure 25 for Figure 3 Enlarged diagram of the circle.

[0216] Reference Figure 3 、 Figure 19-Figure 25 In some embodiments, the bracket 3 includes a bearing portion 31 and two limiting portions 32. The two limiting portions 32 are arranged opposite to each other along the second direction Y and connected to the bearing portion 31. The second direction Y is perpendicular to the first direction X. The two limiting portions 32 are located on the side of the bearing portion 31 facing the battery cell B.

[0217] It can be understood that the carrying portion 31 and the two limiting portions 32 enclose a U-shaped receiving groove 33 , and the U-shaped receiving groove 33 can be used to receive the battery cell B.

[0218] The end of the bracket 3 away from the supporting portion 31 forms an end opening of a U-shaped receiving groove 33, through which the battery cell B can be inserted into the U-shaped receiving groove 33. The bracket 3 forms side openings on both sides along the first direction X, through which the pressing mechanism 2 (e.g., the flexible wall 21a) can squeeze the battery cell B.

[0219] Optionally, the shape of the U-shaped receiving groove 33 is adapted to the shape of the battery cell B.

[0220] In the embodiment of the present application, the supporting portion 31 can support the battery cell B, and the limiting portion 32 can limit the battery cell B from both sides, thereby improving the stability of the battery cell B during the pressurization process.

[0221] In some embodiments, in the first direction X, at least a portion of the supporting portion 31 overlaps with the flexible wall 21 a, and at least a portion of the limiting portion 32 overlaps with the flexible wall 21 a. The supporting portion 31 and the limiting portion 32 can limit the deformation area of ​​the flexible wall 21 a, thereby reducing the risk of the flexible wall 21 a enveloping the battery cell B from all sides.

[0222] In some embodiments, the bracket 3 further includes a connecting portion 34 , which is disposed on a side of the limiting portion 32 away from the battery cell B along the second direction Y, and is configured to be detachably connected to the supporting mechanism 1 .

[0223] In the embodiment of the present application, the connection portion 34 can be provided on one limiting portion 32, or on both limiting portions 32. One limiting portion 32 can be provided with one connection portion 34, or multiple connection portions 34 can be provided at the same time.

[0224] The connecting portion 34 can be detachably connected to the supporting mechanism 1 by plugging, snapping, or threading.

[0225] By providing the connecting portion 34 , the bracket 3 can be detachably connected to the supporting mechanism 1 , thereby limiting the movement of the bracket 3 on the supporting mechanism 1 , improving the stability of the battery cell B during pressurization, and facilitating unloading of the bracket 3 .

[0226] In some embodiments, the support mechanism 1 includes a support plate 11, two end plates 12, and a connecting rod 13. The two end plates 12 are connected to the support plate 11 and spaced apart along a first direction X. The connecting rod 13 connects the two end plates 12. Multiple pressurizing mechanisms 2 are located on one side of the support plate 11 along a third direction Z, perpendicular to the first direction X and the second direction Y, and disposed between the two end plates 12. The connecting portion 34 is connected to the connecting rod 13.

[0227] There can be one or more connecting rods 13 .

[0228] The supporting mechanism 1 can be integrally formed. For example, the supporting mechanism 1 is a plastic part, and the supporting plate 11, the end plate 12, and the connecting rod 13 can be directly integrally formed during the injection molding process. Alternatively, the supporting mechanism 1 is an assembly, that is, a separate supporting plate 11, the end plate 12, and the connecting rod 13 are assembled together.

[0229] In this embodiment of the present application, connecting the two end plates 12 via a connecting rod 13 improves the structural strength of the support mechanism 1. Compared to solutions that use side plates to connect the two end plates 12, connecting the two end plates 12 via a connecting rod 13 reduces weight. The connecting rod 13 also limits the position of the bracket 3, improving the stability of the battery cell B during pressurization.

[0230] In some embodiments, the bracket 3 is provided with connecting rods 13 on both sides along the second direction Y. The two limiting portions 32 are provided with connecting portions 34, and the connecting portions 34 on the two limiting portions 32 are respectively connected to the connecting rods 13 on both sides of the bracket 3. The two connecting rods 13 can limit the bracket 3 in the second direction Y.

[0231] In some embodiments, the connecting portion 34 may be fixedly connected to the connecting rod 13 , or may be slidably connected to the connecting rod 13 along the first direction X.

[0232] Optionally, the connecting portion 34 is slidably connected to the connecting rod 13 along the first direction X. In this way, the position of the bracket 3 in the first direction X is adjustable, which can improve the compatibility of the battery pressurizing device.

[0233] In some embodiments, a slot 341 is provided on the side of the connecting portion 34 facing the carrier plate 11 along the third direction Z, and at least a portion of the connecting rod 13 is accommodated in the slot 341. The bracket 3 also includes a first protrusion 35 provided on the limiting portion 32. The first protrusion 35 is located on the side of the connecting portion 34 facing the carrier plate 11; in the third direction Z, a portion of the connecting rod 13 is located between the first protrusion 35 and the connecting portion 34.

[0234] The slot 341 passes through the connecting portion 34 along the first direction X, so that the connecting rod 13 can pass through the slot 341 .

[0235] The slot 341 has an opening on one side along the third direction Z. Exemplarily, the opening may be in a semicircular, U-shaped, rectangular or other shapes.

[0236] At least a portion of the connecting rod 13 received in the slot 341 can limit the connection portion 34 in the second direction Y. The first protrusion 35 can stop the connecting rod 13 in the third direction Z, thereby reducing the risk of the connecting rod 13 falling out of the slot 341 and improving the stability of the bracket 3.

[0237] In some embodiments, the connecting portion 34 may be in the shape of a hook, which may be hung on the connecting rod 13. In the third direction Z, the bracket 3 may be in contact with the carrying plate 11, or may be spaced apart from the carrying plate 11.

[0238] In some embodiments, the limiting portion 32 includes an elastic arm 321 and an avoidance groove 322 located inside the elastic arm 321 , and the first protrusion 35 protrudes from a surface of the elastic arm 321 away from the avoidance groove 322 .

[0239] The escape groove 322 provides clearance for the elastic arm 321 to swing, allowing the elastic arm 321 to move the first protrusion 35 inward by a certain amount. During assembly, the bracket 3 can be inserted into the support mechanism 1 along the third direction Z. When the connecting rod 13 presses against the first protrusion 35, the elastic arm 321 deforms toward the escape groove 322, allowing the first protrusion 35 to clear the connecting rod 13. When the connecting rod 13 enters the engaging groove 341 and reaches the set position, the elastic arm 321 returns to its original shape, allowing the first protrusion 35 to stop the connecting rod 13 in the third direction Z. The provision of the elastic arm 321 and the escape groove 322 simplifies the assembly process of the battery pressurizing device.

[0240] In some embodiments, the supporting portion 31 is provided with a first avoidance hole 311 , which passes through the supporting portion 31 along a third direction Z perpendicular to the first direction X and the second direction Y. The first avoidance hole 311 is used to avoid a lifting mechanism for lifting the battery cell B.

[0241] There may be one or more first avoidance holes 311 .

[0242] After processing the battery cell B, it is necessary to remove the battery cell B from the bracket 3. In this embodiment, a first escape hole 311 is provided to facilitate an external lifting mechanism to lift the battery cell B from the bottom, allowing the battery cell B to be quickly removed from the bracket 3, thereby improving efficiency. Furthermore, the first escape hole 311 can also reduce weight and dissipate heat.

[0243] In some embodiments, the lifting mechanism includes a lifting rod, which can pass through the first avoidance hole 311 and lift the battery cell B. The shape of the first avoidance hole 311 can be set according to the shape of the lifting rod.

[0244] In some embodiments, the supporting mechanism 1 includes a supporting plate 11 , which is located on a side of the supporting portion 31 facing away from the battery cell B. The supporting plate 11 defines a second avoidance hole 111 , which is used to expose the first avoidance hole 311 .

[0245] In the third direction Z, the projection of the first avoidance hole 311 is located within the projection of the second avoidance hole 111 .

[0246] The carrying plate 11 may be provided with one or more second avoidance holes 111. One second avoidance hole 111 may expose one first avoidance hole 311, or may expose multiple first avoidance holes 311 at the same time.

[0247] The second avoidance hole 111 can avoid the external lifting mechanism, reducing the risk of interference between the supporting plate 11 and the external lifting mechanism, and facilitating the lifting mechanism to pass through the first avoidance hole 311 and lift the battery cell B.

[0248] In some embodiments, the second avoidance hole 111 is a strip-shaped hole extending along the first direction X. The second avoidance hole 111 exposes the first avoidance holes 311 of the plurality of brackets 3 .

[0249] In some embodiments, there are multiple second avoidance holes 111 , and the multiple second avoidance holes 111 are arranged at intervals along the second direction Y.

[0250] In some embodiments, the limiting portion 32 is provided with a heat dissipation hole 323 , and the heat dissipation hole 323 passes through the limiting portion 32 along the second direction Y.

[0251] Optionally, only one of the limiting portions 32 is provided with a heat dissipation hole 323 . Alternatively, both of the limiting portions 32 are provided with a heat dissipation hole 323 .

[0252] By providing the heat dissipation holes 323 on the limiting portion 32 , the heat dissipation effect of the bracket 3 can be improved, reducing the risk of thermal runaway during the formation process of the battery cell B. In addition, by providing the heat dissipation holes 323 , the weight of the bracket 3 can also be reduced.

[0253] In some embodiments, the bracket 3 includes a plurality of sub-brackets 4 arranged along the first direction X. Each sub-bracket 4 includes a sub-bearing portion 41 and two sub-limiting portions 42. The two sub-limiting portions 42 are arranged opposite each other along the second direction Y and connected to the sub-bearing portion 41. The bearing portion 31 includes two sub-bearing portions 41, and each limiting portion 32 includes two sub-limiting portions 42 arranged along the first direction X.

[0254] Exemplarily, each sub-bracket 4 is a U-shaped structure.

[0255] By adjusting the number of the sub-brackets 4 , battery cells B with different thicknesses can be used, thereby improving the compatibility of the battery pressurizing device with different battery cells B.

[0256] In some embodiments, the bracket 3 includes two sub-brackets 4. The two sub-brackets 4 are opposed to each other along the first direction X.

[0257] In some embodiments, the sub-carrying portion 41 is provided with an avoidance recess 411 , and the avoidance recesses 411 of the two sub-brackets 4 are enclosed to form a first avoidance hole 311 .

[0258] In some embodiments, a heat dissipation recess 421 is provided on the sub-limiting portion 42 , and the heat dissipation recesses 421 of the two sub-brackets 4 enclose a heat dissipation hole 323 .

[0259] In some embodiments, the sub-bracket 4 further includes a connecting portion 34 and a first protrusion 35 provided on the sub-limiting portion 42. Each sub-limiting portion 42 is provided with an elastic arm 321 and an avoidance groove 322.

[0260] In some embodiments, the supporting mechanism 1 includes a supporting plate 11, and the pressing mechanism 2 and the bracket 3 are located on one side of the supporting plate 11 along a third direction Z. The third direction Z is perpendicular to the first direction X and the second direction Y. In the third direction Z, the pressing mechanism 2 abuts against the supporting plate 11, and at least a portion of the pressing mechanism 2 is located between the bracket 3 and the supporting plate 11.

[0261] During the process of removing the battery cell B from the bracket 3, the bracket 3 can limit the pressurizing mechanism 2 in the third direction Z, thereby reducing the range of movement of the pressurizing mechanism 2 under the action of the friction between the battery cell B and the pressurizing mechanism 2, reducing the risk of the pressurizing mechanism 2 detaching from the supporting mechanism 1, and improving the reliability of the battery pressurizing device.

[0262] In some embodiments, the pressure mechanism 2 is provided with a positioning recess 213a at one end away from the carrier plate 11. The positioning recess 213a is recessed relative to the surface of the pressure mechanism 2 facing the bracket 3. The bracket 3 includes a second protrusion 36 disposed on the limiting portion 32, and at least a portion of the second protrusion 36 is received in the positioning recess 213a.

[0263] The pressure mechanism 2 may have one or more positioning recesses 213 a. In some examples, the pressure mechanism 2 may have more than one positioning recesses 213 a, and each positioning recess 213 a is correspondingly provided with a second protrusion 36 .

[0264] The positioning recess 213 a opens on the end surface of the pressing mechanism 2 away from the carrying plate 11 , so that the second protrusion 36 can be inserted into the positioning recess 213 a along the third direction Z.

[0265] In this embodiment of the present application, the second protrusion 36 can limit the pressure mechanism 2 in the third direction Z, reducing the risk of the pressure mechanism 2 detaching from the support mechanism 1 and improving the reliability of the battery pressure device. The provision of the positioning recess 213a can reduce the maximum dimension requirement of the bracket 3 along the third direction Z, thereby reducing the volume and weight of the bracket 3.

[0266] In some embodiments, a plurality of positioning recesses 213 a are provided on the surface of the pressurizing mechanism 2 facing the bracket 3 , and the plurality of positioning recesses 213 a are spaced apart along the second direction Y. Each positioning recess 213 a accommodates a second protrusion 36 .

[0267] The second protrusion 36 extending into the plurality of positioning recesses 213 a can limit the pressing mechanism 2 in the second direction Y, thereby improving the stability of the pressing mechanism 2 .

[0268] In some embodiments, the positioning recess 213a is formed in the base plate 213 of the capsule 21. When the battery cell B is removed from the bracket 3, the bracket 3 can limit the capsule 21 in the third direction Z.

[0269] The brackets 3 located on both sides of the capsule 21 can limit the capsule 21 in the first direction X. The second protrusions 36 of the brackets 3 can limit the capsule 21 in the second direction Y. The support plate 11 and the second protrusions 36 of the brackets 3 can limit the capsule 21 in the third direction Z. In the embodiment of the present application, the capsule 21 can be positioned by the brackets 3 and the support plate 11, without the need for additional structures to fix it to the support mechanism 1 or the brackets 3, thereby simplifying the structure of the capsule 21.

[0270] In some embodiments, the pressurizing mechanism 2 includes two capsules 21 , and a positioning recess 213 a is defined on the base plates 213 of the two capsules 21 .

[0271] In some embodiments, two positioning recesses 213 a are provided on the surface of the substrate 213 facing the bracket 3 . The two positioning recesses 213 a are provided at both ends of the substrate 213 along the second direction Y and open on the end surface of the substrate 213 along the second direction Y.

[0272] In some embodiments, the sub-bracket 4 includes two second protrusions 36 , and the two second protrusions 36 are respectively connected to the two sub-limiting portions 42 .

[0273] In some embodiments, the base plate 213 of the capsule 21 may also be fixedly connected to a sub-bracket 4. For example, the base plate 213 of the capsule 21 is fixedly connected to a sub-bracket 4 via fasteners. A capsule 21 and a sub-bracket 4 may be used as a whole.

[0274] An embodiment of the present application further provides a battery production system, which includes the battery pressurizing device provided by any of the aforementioned embodiments.

[0275] In some embodiments, the battery production system further includes a fluid delivery mechanism, which is connected to the capsule 21 and is used to deliver fluid into the accommodating cavity 211 of the capsule 21 .

[0276] Optionally, the fluid delivery mechanism includes a gas delivery device.

[0277] In some embodiments, the battery production system further includes a control power supply connected to the electrode connector 24 of the capsule 21 .

[0278] In some embodiments, the battery production system further includes processing equipment for performing specific processing on the battery cells B. For example, in some examples, the processing equipment may be a negative pressure device used to extract gas from the battery cells B during the formation process of the battery cells B. In other examples, the processing equipment may be a liquid injection device used to inject electrolyte into the interior of the battery cells B.

[0279] In some embodiments, the battery production system further includes a lifting mechanism, which is used to pass through the second avoidance hole 111 and the first avoidance hole 311 and lift the battery cell B in the bracket 3 .

[0280] Reference Figure 1-6 、 Figure 19-25 , an embodiment of the present application provides a battery pressurizing device, which includes a carrying mechanism 1, multiple pressurizing mechanisms 2 and multiple brackets 3.

[0281] The supporting mechanism 1 includes a supporting plate 11 , two end plates 12 and a plurality of connecting rods 13 . The two end plates 12 are spaced apart along a first direction X and fixed to the supporting plate 11 . Each connecting rod 13 extends along the first direction X and connects the two end plates 12 .

[0282] A plurality of pressurizing mechanisms 2 are arranged between the two end plates 12 along the first direction X. Battery cells B are placed between adjacent pressurizing mechanisms 2 .

[0283] Each pressurizing mechanism 2 includes a capsule 21. The capsule 21 comprises a base plate 213 and a flexible body 214. The base plate 213 has a recess 215 defined along one side of the first direction X. The flexible body 214 is connected to the base plate 213 and covers the recess 215, thereby forming a housing cavity 211 together with the base plate 213. The elastic modulus of the base plate 213 is greater than that of the flexible body 214.

[0284] The base plate 213 is provided with a sac opening 212 that communicates with the accommodating chamber 211. The pressurizing mechanism 2 also includes a valve body 22 disposed in the sac opening 212. The valve body 22 is connected to the fluid delivery mechanism. The fluid delivery mechanism can inject fluid into the accommodating chamber 211 through the valve body 22 and the sac opening 212, thereby deforming the flexible body 214 and squeezing the battery cell B.

[0285] Among the multiple pressurizing mechanisms 2 arranged along the first direction X, the pressurizing mechanisms 2 at both ends include one capsule 21 , and the other pressurizing mechanisms 2 include two capsules 21 . The flexible bodies 214 of the two capsules 21 of the pressurizing mechanisms 2 are arranged opposite to each other along the first direction X.

[0286] A bracket 3 is provided between any two adjacent pressurizing mechanisms 2 in the first direction X. The bracket 3 is used to carry the battery cells B.

[0287] The bracket 3 includes two sub-brackets 4 arranged along a first direction X. Each sub-bracket 4 includes a sub-carrying portion 41 and two sub-limiting portions 42. The two sub-limiting portions 42 are arranged opposite each other along a second direction Y and connected to the sub-carrying portion 41. The second direction Y is perpendicular to the first direction X. The two sub-limiting portions 42 are located on the side of the sub-carrying portion 41 facing the battery cell B.

[0288] The sub-bearing portions 41 of the two sub-brackets 4 abut against each other and are used to bear the battery cell B. The sub-limiting portions 42 of the two sub-brackets 4 abut against each other and are used to limit the battery cell B in the second direction Y.

[0289] The sub-carrying portion 41 is provided with an escape recess 411 , and the escape recesses 411 of the two sub-brackets 4 are enclosed to form a first escape hole 311 .

[0290] Multiple brackets 3 are located on one side of the carrier plate 11 along the third direction Z, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other. The carrier plate 11 is provided with a second escape hole 111, which is used to expose the first escape hole 311. An external lifting mechanism can lift the battery cells B in the brackets 3 through the second escape hole 111 and the first escape hole 311.

[0291] The sub-bracket 4 further includes a connecting portion 34 disposed on the sub-limiting portion 42. A slot 341 is defined on the side of the connecting portion 34 facing the carrier plate 11 along the third direction Z. At least a portion of the connecting rod 13 is received in the slot 341. The sub-bracket 4 further includes a first protrusion 35 disposed on the sub-limiting portion 42. The first protrusion 35 is located on the side of the connecting portion 34 facing the carrier plate 11. In the third direction Z, a portion of the connecting rod 13 is located between the first protrusion 35 and the connecting portion 34.

[0292] The sub-limiting portion 42 includes an elastic arm 321 and an escape groove 322 located inside the elastic arm 321 . The first protrusion 35 protrudes from a surface of the elastic arm 321 facing away from the escape groove 322 .

[0293] The base plate 213 has a positioning recess 213a at one end away from the carrier plate 11. The positioning recess 213a is recessed relative to the surface of the base plate 213 facing the bracket 3. The sub-bracket 4 includes a second protrusion 36, at least part of which is received in the positioning recess 213a.

[0294] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

Claims

1. A battery pressurizing device, characterized in that: include: Carrying mechanism; A plurality of pressurizing mechanisms, disposed on the supporting mechanism and arranged along a first direction; A plurality of brackets are provided between adjacent pressurizing mechanisms, the brackets are detachably connected to the supporting mechanism and used to support the battery monomer, and the pressurizing mechanism is used to compress the battery monomer.

2. The battery pressurizing device according to claim 1, characterized in that: The pressurizing mechanism has an accommodating cavity inside, and the cavity wall of the accommodating cavity includes a flexible wall, and the flexible wall is arranged on at least one side of the accommodating cavity along the first direction; the flexible wall is configured to deform and squeeze the battery cell when the accommodating cavity expands; In the first direction, at least a portion of the bracket overlaps the flexible wall and is used to define a deformation area of ​​the flexible wall.

3. The battery pressurizing device according to claim 2, characterized in that: The accommodating chamber is used to communicate with a fluid delivery mechanism, and the fluid delivery mechanism is used to deliver fluid to the accommodating chamber; or, An expandable body is accommodated in the accommodating cavity, and the expandable body is configured to expand under preset conditions.

4. The battery pressurizing device according to any one of claims 1 to 3, characterized in that: The bracket includes a bearing portion and two limiting portions, the two limiting portions are arranged opposite to each other along a second direction and connected to the bearing portion, the second direction is perpendicular to the first direction, and the two limiting portions are located on a side of the bearing portion facing the battery cell.

5. The battery pressurizing device according to claim 4, characterized in that: The bracket further includes a connecting portion, which is disposed on a side of the limiting portion away from the battery cell along the second direction, and is used to be detachably connected to the supporting mechanism.

6. The battery pressurizing device according to claim 5, characterized in that: The bearing mechanism comprises a bearing plate, two end plates and a connecting rod, the two end plates are connected to the bearing plate and are spaced apart along the first direction, and the connecting rod connects the two end plates; The plurality of pressurizing mechanisms are located on one side of the bearing plate along a third direction and are arranged between the two end plates, and the third direction is perpendicular to the first direction and the second direction; The connecting portion is connected to the connecting rod.

7. The battery pressurizing device according to claim 6, characterized in that: A slot is provided on one side of the connecting portion facing the carrying plate along the third direction, and at least a portion of the connecting rod is accommodated in the slot; The bracket further comprises a first protrusion arranged on the limiting portion, wherein the first protrusion is located on a side of the connecting portion facing the bearing plate; in the third direction, a portion of the connecting rod is located between the first protrusion and the connecting portion.

8. The battery pressurizing device according to claim 7, characterized in that: The limiting portion includes an elastic arm and an avoidance groove located inside the elastic arm, and the first convex portion protrudes from a surface of the elastic arm away from the avoidance groove.

9. The battery pressurizing device according to any one of claims 4 to 8, characterized in that: The bearing portion is provided with a first avoidance hole, the first avoidance hole penetrates the bearing portion along a third direction, and the third direction is perpendicular to the first direction and the second direction; The first avoidance hole is used to avoid a lifting mechanism for lifting the battery cell.

10. The battery pressurizing device according to claim 9, characterized in that: The bearing mechanism comprises a bearing plate, and the bearing plate is located on a side of the bearing portion away from the battery cell; The bearing plate is provided with a second avoidance hole, and the second avoidance hole is used to expose the first avoidance hole.

11. The battery pressurizing device according to any one of claims 4 to 10, characterized in that: The limiting portion is provided with a heat dissipation hole, and the heat dissipation hole penetrates the limiting portion along the second direction.

12. The battery pressurizing device according to any one of claims 4 to 11, characterized in that: The bracket includes a plurality of sub-brackets arranged along the first direction, each of the sub-brackets includes a sub-bearing portion and two sub-limiting portions, and the two sub-limiting portions are arranged opposite to each other along the second direction and connected to the sub-bearing portion; The bearing portion includes two sub-bearing portions, and each of the limiting portions includes two sub-limiting portions arranged along the first direction.

13. The battery pressurizing device according to any one of claims 4 to 12, characterized in that: The bearing mechanism comprises a bearing plate, the pressing mechanism and the bracket are located on one side of the bearing plate along a third direction, and the third direction is perpendicular to the first direction and the second direction; In the third direction, the pressing mechanism abuts against the carrying plate, and at least a portion of the pressing mechanism is located between the bracket and the carrying plate.

14. The battery pressurizing device according to claim 13, characterized in that: The pressure mechanism is provided with a positioning recess at one end away from the carrying plate, and the positioning recess is recessed relative to the surface of the pressure mechanism facing the bracket; The bracket includes a second protrusion disposed on the limiting portion, and at least a portion of the second protrusion is accommodated in the positioning recess.

15. The battery pressurizing device according to claim 14, characterized in that: The surface of the pressurizing mechanism facing the bracket is provided with a plurality of the positioning recesses, and the plurality of the positioning recesses are arranged at intervals along the second direction; The second convex portion is accommodated in each of the positioning concave portions.

16. A battery production system, characterized in that: Comprising a battery pressurizing device according to any one of claims 1-15.

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