Battery pressurizing device and battery production system

Abstract

The utility model provides a battery pressurizing device and a battery production system. The battery pressurizing device comprises a bearing mechanism and a plurality of pressurizing mechanisms, the pressurizing mechanisms are arranged on the bearing mechanism and arranged in the first direction, a single battery is placed between every two adjacent pressurizing mechanisms, and each pressurizing mechanism comprises a pressurizing part and a connector arranged on the pressurizing part; the connector is used for communicating an external fluid conveying mechanism with the inner cavity of the pressurizing piece. The connector comprises a positioning structure, and the positioning structure is used for being matched with a fluid conveying mechanism. According to the invention, the pressurizing efficiency and reliability of the battery pressurizing device can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, 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 cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc.

[0003] In some production processes of battery cells, it is necessary to pressurize the battery cells through a battery pressurizing device. The pressurizing efficiency of the battery pressurizing device will directly affect the production efficiency of the battery cells and has an important impact on the economic benefits of the battery. Therefore, how to effectively improve the pressurizing efficiency of the battery pressurizing device is an urgent problem to be solved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery pressurizing device and a battery production system, which can effectively improve the pressurizing efficiency and reliability of the battery pressurizing device.

[0005] In the first aspect, the embodiment of the present application provides a battery pressurizing device, which includes a bearing mechanism and a plurality of pressurizing mechanisms, wherein the plurality of pressurizing mechanisms are disposed on the bearing mechanism and arranged along a first direction, and a battery cell is placed between two adjacent pressurizing mechanisms, and each pressurizing mechanism includes a pressurizing member and a joint disposed on the pressurizing member, and the joint is used to connect an external fluid conveying mechanism with an inner cavity of the pressurizing member. The joint includes a positioning structure, and the positioning structure is used to cooperate with the fluid conveying mechanism.

[0006] The above technical solution sets a positioning structure on the joint so that during the process of the joint and the fluid conveying mechanism docking, the positioning structure can cooperate with the fluid conveying mechanism, so that the joint can quickly and accurately complete the docking, reducing the time required for the joint and the fluid conveying mechanism docking process, and reducing the risk of pressurization failure caused by misalignment of the joint and the fluid conveying mechanism, thereby effectively improving the pressurization efficiency and reliability of the battery pressurization device. In addition, by setting up multiple pressurization mechanisms, multiple pressure sites can be provided, thereby improving the uniformity of the pressure on multiple battery cells.

[0007] In some embodiments of the first aspect, at least a portion of the connector is configured as a magnetic member.

[0008] The above technical solution provides a magnetic part to enable the connector 22 to quickly and accurately connect with the fluid conveying mechanism by means of magnetic connection, which is simple to operate and low in cost.

[0009] In some embodiments of the first aspect, a sealing member is provided on the joint, and the sealing member is sleeved on the joint.

[0010] The above technical solution reduces the risk of fluid leakage when the fluid conveying mechanism conveys the fluid to the inner cavity of the pressurizing part through the joint by setting a seal. This can not only improve the fluid conveying utilization efficiency during the pressurizing process, but also reduce the risk of contaminating the battery cell due to fluid leakage.

[0011] In some embodiments of the first aspect, a snap-fit ​​member is provided on the connector, and the snap-fit ​​member is used to snap-fit ​​with the fluid conveying mechanism.

[0012] By providing a snap-fit ​​piece on the connector, it is not only beneficial to the stability of the connection between the connector and the fluid conveying mechanism, but also can greatly simplify the installation and disassembly process between the connector and the fluid conveying mechanism, significantly improving the use efficiency and operating convenience of the battery pressurizing device.

[0013] In some embodiments of the first aspect, the pressurizing member includes a substrate and a cover plate, the substrate has an opening on at least one end surface along the first direction, the cover plate covers the opening and forms an inner cavity with the substrate, the connector is provided on the substrate, the substrate is provided with a channel for connecting the inner cavity and the connector, and the cover plate is configured to squeeze the battery cell when the pressure of the inner cavity reaches a threshold.

[0014] The embodiments of the present application can help achieve directional deformation of the pressurizing member by providing a substrate and a cover plate, so that the cover plate can effectively pressurize the battery cell. In addition, when the cover plate is worn, the cover plate can be replaced, thereby reducing the maintenance cost of the battery pressurizing device.

[0015] In some embodiments of the first aspect, the elastic modulus of the cover plate is smaller than the elastic modulus of the base plate.

[0016] The cover plate has good elasticity, and when the internal pressure in the accommodating cavity increases, the cover plate can be deformed quickly to transmit the pressure to the battery cell. The base plate has great strength and is not easily deformed, which can help to achieve directional deformation of the pressurizing mechanism and increase the rate of increase of the internal pressure in the accommodating cavity.

[0017] In some embodiments of the first aspect, the cover plate is attached to an end surface of the base plate.

[0018] In an embodiment of the present application, the cover plate may have a larger area. Attaching the cover plate to the end surface can increase the connection area between the cover plate and the substrate, improve the connection strength between the cover plate and the substrate, reduce the risk of separation of the cover plate and the substrate under the action of internal pressure, and extend the service life of the battery pressurization device.

[0019] In some embodiments of the first aspect, the cover plate is received in the opening, and an outer surface of the cover plate is flush with the end surface.

[0020] The above technical solution can reduce the space occupied by the pressurizing mechanism. In addition, when the battery cell is inserted between the pressurizing mechanisms, the embodiment of the present application can reduce the risk of the battery cell rubbing against the cover plate, reduce the wear of the cover plate, and increase the service life of the battery pressurizing device.

[0021] In some embodiments of the first aspect, the plurality of pressurizing mechanisms include two first pressurizing mechanisms and at least one second pressurizing mechanism, and the second pressurizing mechanism is disposed between the two first pressurizing mechanisms. An opening is disposed on one end surface of a substrate of the first pressurizing mechanism along a first direction, and a cover plate of the first pressurizing mechanism faces the second pressurizing mechanism along the first direction. Openings are disposed on both end surfaces of the substrate of the second pressurizing mechanism along the first direction, and the second pressurizing mechanism includes two cover plates, and the two cover plates respectively cover the two openings of the substrate.

[0022] The second pressurizing mechanism can apply pressure to the battery cells on both sides at the same time. Therefore, the embodiment of the present application can reduce the total number of pressurizing mechanisms and simplify the structure of the battery pressurizing device.

[0023] In some embodiments of the first aspect, the cover plate includes a flexible body, and the flexible body is configured to expand and deform when the pressure of the inner cavity reaches a threshold.

[0024] The flexible body can adaptively deform according to the shape of the battery cell, thereby maintaining the extrusion on the surface of the battery cell, improving the uniformity of the force on the battery cell, and reducing the generation of extrusion dead corners.

[0025] In some embodiments of the first aspect, the flexible body includes an elastic structure.

[0026] The flexible body can have good elasticity, can recover after deformation, can be used multiple times, and improve the service life of the battery pressurizing device.

[0027] In some embodiments of the first aspect, the bearing mechanism includes a bearing plate, an end plate and a guide shaft, the end plate is connected to one end of the bearing plate along a first direction, a plurality of pressurizing mechanisms are located on one side of the end plate along the first direction, and are provided on one side of the bearing plate along a second direction, the first direction intersects the second direction, the guide shaft extends along the first direction and is connected to the end plate, and the pressurizing mechanism is slidably connected to the guide shaft along the first direction.

[0028] In the embodiment of the present application, the pressurizing member can be moved along the first direction as needed to change the spacing between the pressurizing mechanisms, so that the battery pressurizing device can adapt to battery cells of different thicknesses.

[0029] In some embodiments of the first aspect, the battery pressurizing device further includes a limit block, which is detachably connected between the end plate and the pressurizing mechanism.

[0030] When the spacing or number between the pressurizing mechanisms changes, the end plate can be enabled to apply a resisting force to the pressurizing mechanism by replacing limit blocks of different thicknesses without removing and replacing the entire end plate from the supporting mechanism, thereby effectively improving the ease of use of the battery pressurizing device.

[0031] In some embodiments of the first aspect, the joint is connected to the end of the pressurizing mechanism along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other, which can provide a larger setting space for the setting of the joint and reduce the difficulty of setting the joint.

[0032] In some embodiments of the first aspect, there are multiple connectors, and the multiple connectors are spaced apart along the second direction. By increasing the number of connectors, the pressurization efficiency of the battery pressurization device can be further improved.

[0033] In a second aspect, the present application provides a battery production system, which includes a fluid delivery mechanism and a battery pressurizing device provided by any embodiment of the first aspect, wherein the fluid delivery mechanism is connected to a joint.

[0034] In some embodiments of the second aspect, the fluid delivery mechanism includes a delivery pipe and a regulating valve, the delivery pipe is connected to the joint, and the regulating valve is disposed on the delivery pipe.

[0035] The above technical solution provides a regulating valve so that the speed and pressure of fluid delivery can be accurately adjusted according to actual needs, which significantly improves the control accuracy and flexibility of the pressurization process.

[0036] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic diagram of the structure of a battery pressurizing device provided in some embodiments of the present application;

[0039] Figure 2 A schematic structural diagram of a first pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application;

[0040] Figure 3 for Figure 2Schematic diagram of the cross-section structure along AA;

[0041] Figure 4 for Figure 2 A schematic diagram of the local enlarged structure at H;

[0042] Figure 5 A schematic structural diagram of a second pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application;

[0043] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along BB.

[0044] The reference numerals in the specific implementation manner are as follows:

[0045] 100. Battery cell;

[0046] 10. Carrying mechanism; 11. Carrying plate; 12. End plate; 13. Guide shaft; 20. Pressurizing mechanism; 20a. First pressurizing mechanism; 20b. Second pressurizing mechanism; 21. Pressurizing member; 211. Inner cavity; 212. Base plate; 213. Cover plate; 22. Joint; 221. Sealing member; 222. Fastener; 30. Limiting block;

[0047] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments 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", "second", etc. 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 and secondary relationship.

[0050] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0051] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0052] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0054] The term "plurality" used in the present application refers to two or more (including two).

[0055] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0056] With the development of battery technology, battery cells are used in more and more fields and are gradually replacing traditional petrochemical energy in the field of automotive power. Battery cells can store chemical energy and controllably convert chemical energy into electrical energy. In recyclable battery cells, the active material can be activated by charging after discharge and continue to be used.

[0057] The battery cell can be but is not limited to a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., and the embodiments of the present application are not limited to this.

[0058] As an example, the battery cell may be, but is not limited to, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, a polygonal battery cell, such as a hexagonal battery cell.

[0059] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0060] In some embodiments, the battery may be a battery pack, which includes a battery case and battery cells, wherein the battery cells or battery modules are accommodated in the battery case.

[0061] In some embodiments, the battery may be an energy storage device, which includes an energy storage container, an energy storage cabinet, and the like.

[0062] With the development of battery technology, battery cells are used in more and more fields and are gradually replacing traditional petrochemical energy in the field of automotive power. Battery cells can store chemical energy and controllably convert chemical energy into electrical energy. In recyclable battery cells, the active material can be activated by charging after discharge and continue to be used.

[0063] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0064] In some production processes of battery cells, the battery cells need to be pressurized by a battery pressurizing device. The pressurizing efficiency of the battery pressurizing device will directly affect the production efficiency of the battery cells and has an important impact on the economic benefits of the battery.

[0065] The production process of battery cells generally includes stirring, coating, rolling, slitting, assembly and formation, and the formation process is an important process, which has a crucial impact on the cycle performance of battery cells. The formation of battery cells can refer to the first charge and discharge process of battery cells after the battery cells are injected. For example, in lithium-ion battery cells, formation can activate the active substances in the battery cells and activate the lithium-ion battery. At the same time, the lithium salt reacts with the electrolyte to form a solid electrolyte interface film (Solid Electrolyte Interface, SEI) 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 solid electrolyte interface film has a great influence on the cycle life, initial capacity loss, rate performance, etc. of the battery cell.

[0066] 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 interfacial lithium deposition. In addition, the gas will also cause the battery cell to expand and deform, resulting in the size specifications of the battery cell not meeting the standards. Therefore, during the formation process, it is usually necessary to apply pressure to the battery cell to accelerate the discharge of gas, reduce the gas remaining inside the battery cell, reduce the deformation of the battery cell, and improve the appearance yield of the battery cell.

[0067] In addition, in some other testing processes, such as battery cell capacity testing and battery cell self-discharge testing, it is also necessary to apply pressure to the battery cell. When the battery cell is charged during the capacity test, the pole pieces expand. If the distance between the pole pieces is large, the pole pieces will be wrinkled, which will affect the embedding of lithium ions. Black spots or lithium precipitation will form on the battery interface. By applying a restraining force to the battery cell during the capacity test, the distance between the pole pieces can be reduced to suppress the wrinkling of the pole pieces. During the battery cell self-discharge test, applying a restraining force to the battery cell will help the precipitation of metal impurities in the battery cell, and the test results will be more accurate and the leakage situation will be improved.

[0068] In some battery pressurizing devices, a connector for connecting to the fluid conveying mechanism is usually provided, so that the fluid conveying mechanism can convey the fluid to the inner cavity of the pressurizing member, so that the pressurizing member can apply pressure to the battery cell. In the use of the battery pressurizing device in the related art, it usually takes a long time to dock the connector with the fluid conveying mechanism, which makes the pressurizing efficiency of the battery pressurizing device low, which will directly affect the production efficiency of the battery cell and have an important impact on the economic benefits of the battery. In addition, there is also the risk of pressurization failure due to misalignment of the connector and the fluid conveying mechanism.

[0069] Based on the above considerations, the embodiment of the present application provides a battery pressurizing device, which includes a bearing mechanism and a plurality of pressurizing mechanisms, wherein the plurality of pressurizing mechanisms are disposed on the bearing mechanism and arranged along a first direction, and a battery cell is placed between two adjacent pressurizing mechanisms, and each pressurizing mechanism includes a pressurizing member and a joint disposed on the pressurizing member, and the joint is used to connect an external fluid conveying mechanism with an inner cavity of the pressurizing member. The joint includes a positioning structure, and the positioning structure is used to cooperate with the fluid conveying mechanism.

[0070] When it is necessary to pressurize the battery cells, multiple battery cells can be inserted between multiple pressurizing mechanisms, and the fluid delivery mechanism can deliver the fluid to the inner cavity of the pressurizing member through the joint, so that the pressurizing member squeezes the battery cells. In the embodiment of the present application, a positioning structure is provided on the joint, so that during the docking process between the joint and the fluid delivery mechanism, the positioning structure can cooperate with the fluid delivery mechanism, so that the joint can complete the docking quickly and accurately, reducing the time required for the docking process between the joint and the fluid delivery mechanism, thereby effectively improving the pressurization efficiency of the battery pressurizing device. In addition, by providing multiple pressurizing mechanisms, multiple pressure sites can be provided, thereby improving the uniformity of the pressure on multiple battery cells.

[0071] 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 in the battery production process.

[0072] Figure 1 This is a schematic diagram of the structure of a battery pressurizing device provided in some embodiments of the present application. Figure 2 This is a schematic structural diagram of a first pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application. Figure 3 for Figure 2 Schematic diagram of the cross-section structure along AA, Figure 4 for Figure 2 Schematic diagram of the local enlarged structure at H, Figure 5 This is a schematic structural diagram of a second pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application. Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along BB.

[0073] refer to Figures 1 to 6 The embodiment of the present application provides a battery pressurizing device, which includes a carrier mechanism 10 and a plurality of pressurizing mechanisms 20. The plurality of pressurizing mechanisms 20 are disposed on the carrier mechanism 10 and arranged along a first direction X. A battery cell 100 is placed between two adjacent pressurizing mechanisms 20. Each pressurizing mechanism 20 includes a pressurizing member 21 and a connector 22 disposed on the pressurizing member 21. The connector 22 is used to connect an external fluid conveying mechanism with an inner cavity 211 of the pressurizing member 21. The connector 22 includes a positioning structure, which is used to cooperate with the fluid conveying mechanism.

[0074] The battery pressurizing device can be used to pressurize the member to be pressurized 21. As an example, the following description is made by taking the member to be pressurized 21 as a battery cell 100.

[0075] The carrying mechanism 10 can be used to carry multiple pressurizing mechanisms 20. As an example, when the battery cell 100 needs to be pressurized, the carrying mechanism 10 can be used to carry the battery cell 100. Of course, the carrying mechanism 10 can directly carry the battery cell 100, or indirectly carry the battery cell 100 through other components (such as the pressurizing mechanism 20). The carrying mechanism 10 may include a pallet, which may be a flat pallet or a box pallet. The material of the carrying mechanism 10 includes but is not limited to metal, plastic, inorganic non-metal or wood.

[0076] The pressurizing mechanism 20 is a component used to apply pressure to the battery cell 100. When the battery cell 100 needs to be pressurized, multiple battery cells 100 can be inserted between multiple pressurizing mechanisms 20, and the connector 22 can be connected to the fluid conveying mechanism. The fluid conveying mechanism can convey the fluid to the inner cavity 211 of the pressurizing member 21 through the connector 22, so as to use the pressure of the fluid to achieve the pressurization of the battery cell 100 by the pressurizing member 21. Among them, the inner cavity 211 of the pressurizing member 21 is used to accommodate the fluid, and the fluid refers to a medium that is fluid at room temperature, such as a gas medium or a liquid medium. Exemplarily, the gas medium can be a medium that is gaseous at room temperature, such as air, an inert gas, or nitrogen. Exemplarily, the liquid medium can be a medium that is liquid at room temperature, such as water, oil, etc.

[0077] The fluid delivery mechanism may be directly connected to the connector 22 to communicate with the inner cavity 211 of the pressurizing member 21 ; alternatively, the fluid delivery mechanism may be indirectly connected to the connector 22 via other components to communicate with the connector 22 via the components.

[0078] The connectors 22 of the multiple pressurizing mechanisms 20 may be connected to the same fluid delivery mechanism or may be connected to different fluid delivery mechanisms.

[0079] The fluid delivery mechanism may only input fluid into the inner cavity 211 of the pressurizing member 21. Alternatively, the fluid delivery mechanism may both input fluid into the inner cavity 211 of the pressurizing member 21 and extract the fluid from the inner cavity 211 of the pressurizing member 21.

[0080] The pressurizing mechanism 20 may be fixedly connected to the supporting mechanism 10. Alternatively, the position of the pressurizing mechanism 20 on the supporting mechanism 10 is adjustable along the first direction X. The pressurizing mechanism 20 may be an integrated component, or may be formed by connecting a plurality of independent components.

[0081] All the pressurizing mechanisms 20 of the battery pressurizing device may be arranged in a row or in multiple rows. In some examples, all the pressurizing mechanisms 20 of the battery pressurizing device are arranged in a row along the first direction X. In other examples, the battery pressurizing device includes multiple pressurizing sequences, each pressurizing sequence includes at least two pressurizing mechanisms 20 arranged along the first direction X, and multiple pressurizing sequences are arranged along the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y.

[0082] The plurality of pressurizing mechanisms 20 may have the same structure or different structures, as long as the pressurizing mechanisms 20 can compress the battery cells 100 .

[0083] The pressure mechanism 20 is disposed on the supporting mechanism 10. As an example, the pressure mechanism 20 can be detachably mounted on the supporting mechanism 10, or can be integrally disposed on the supporting mechanism 10. The pressure mechanism 20 can be directly connected to the supporting mechanism 10, or can be restricted on the supporting mechanism 10 by other components.

[0084] Optionally, the joint 22 may be detachably connected to the pressure member 21, or may be integrally provided on the pressure member 21. The joint 22 may be directly connected to the pressure member 21, or may be restricted to the pressure member 21 by other components. As an example, the connection method between the joint 22 and the pressure member 21 may be, but is not limited to, bonding or riveting.

[0085] The positioning structure on the connector 22 is used to cooperate with the fluid conveying mechanism, and the connector 22 can quickly and accurately complete the docking, reducing the time required for the docking process between the connector 22 and the fluid conveying mechanism. There are many forms of cooperation between the positioning structure and the fluid conveying mechanism, and the following examples are given.

[0086] As an example, the positioning structure may be a plug-in positioning structure, for example, the positioning structure is a latch, and a slot matching the latch is provided on the fluid delivery mechanism, and the cooperation between the slot and the latch can enable the connector 22 to be quickly and accurately docked with the fluid delivery mechanism. Alternatively, the positioning structure is a slot, and a latch matching the latch is provided on the fluid delivery mechanism.

[0087] As another example, the positioning structure may be a snap-fit ​​positioning structure, for example, the positioning structure is a buckle, and the fluid conveying mechanism is provided with a buckle that matches the buckle, and the cooperation between the buckle and the buckle can enable the connector 22 to be quickly and accurately connected to the fluid conveying mechanism. Alternatively, the positioning structure is a buckle, and the fluid conveying mechanism is provided with a buckle that matches the buckle.

[0088] It should be noted that the matching forms between the positioning structure and the fluid conveying mechanism are not limited to the above-mentioned ones. Any structural form that can facilitate the rapid and accurate docking of the connector 22 and the fluid conveying mechanism can be selected according to the actual application environment.

[0089] The above technical solution sets a positioning structure on the connector 22, so that during the docking process between the connector 22 and the fluid delivery mechanism, the positioning structure can cooperate with the fluid delivery mechanism, so that the connector 22 can quickly and accurately complete the docking, reduce the time required for the docking process between the connector 22 and the fluid delivery mechanism, and reduce the risk of pressurization failure caused by misalignment of the connector 22 and the fluid delivery mechanism, thereby effectively improving the pressurization efficiency and reliability of the battery pressurization device. In addition, by setting up multiple pressurization mechanisms 20, multiple pressure application sites can be provided, thereby improving the uniformity of the pressure on multiple battery cells 100.

[0090] In some embodiments, at least a portion of connector 22 is configured as a magnetic member.

[0091] Exemplarily, a magnetic part refers to a material that can directly or indirectly generate magnetism. In other words, a magnetic part refers to a structure with magnetism. At least part of the connector 22 is configured as a magnetic part. It can be understood that a part of the connector 22 is made of a magnetic part, and another part of the connector 22 is made of a non-magnetic part; or, all of the connectors 22 are made of magnetic parts. Magnetic parts are also provided on the fluid conveying mechanism, and the connector 22 and the fluid conveying mechanism can be magnetically connected through their respective magnetic parts, thereby achieving fast and accurate docking.

[0092] In this way, the above technical solution, by providing a magnetic part, enables the connector 22 to quickly and accurately connect with the fluid conveying mechanism by means of magnetic connection, which is simple to operate and low in cost.

[0093] In some embodiments, a sealing member 221 is disposed on the joint 22 , and the sealing member 221 is sleeved on the joint 22 .

[0094] After the joint 22 is connected to the fluid delivery mechanism, the seal 221 can seal the gap between the joint 22 and the fluid delivery mechanism, thereby reducing the risk of fluid leakage in the process of the fluid delivery mechanism delivering the fluid to the inner cavity 211 of the pressurizing member 21 through the joint 22. As an example, the fluid delivery mechanism includes a delivery pipe for delivering fluid, and after the delivery pipe is connected to the joint 22, the delivery pipe is sleeved on the joint 22, and the seal 221 is connected between the outer wall of the joint 22 and the inner wall of the delivery pipe.

[0095] Exemplarily, the seal 221 may be a flexible component. After the joint 22 is connected to the fluid conveying mechanism, the seal 221 is a component or material located at the connection between the joint 22 and the fluid conveying mechanism and plays a sealing role. For example, the seal 221 may be a rubber seal ring, based on which, it can play a role in filling the gap and preventing leakage. Rubber has the characteristics of high temperature resistance, corrosion resistance, wear resistance, etc., and can be conveniently applied to the circulation of various fluid media.

[0096] The seal 221 may also be a metal gasket, and optionally, the material of the metal gasket includes but is not limited to stainless steel, copper, iron, etc. Among them, the metal gasket has the characteristics of high temperature, high pressure, corrosion resistance, etc., and can be conveniently applied to the circulation of various fluid media.

[0097] The seal 221 may also be an expansion joint, which can effectively reduce the alignment error caused by thermal expansion and contraction or vibration through the compensation joint, which is conducive to ensuring the sealing between the joint 22 and the fluid conveying mechanism. Among them, the expansion joint has the characteristics of being adjustable, corrosion-resistant, high-temperature-resistant, and having good shock-resistant performance.

[0098] The seal 221 can also be a fiber gasket, a rubber-plastic plate gasket, etc., wherein the rubber-plastic plate gasket is a seal 221 made of a mixture of rubber and plastic materials, and has good pressure resistance, high temperature resistance, wear resistance, etc. The rubber-plastic plate gasket can use a variety of fluid media, which is conducive to ensuring the sealing between the joint 22 and the fluid conveying mechanism.

[0099] It can be understood that the above-mentioned seal 221 is only an example and not a specific limitation of the embodiment of the present application. When selecting the seal 221, factors such as fluid medium, temperature and pressure can be combined to select a suitable seal 221 to improve the reliability of the sealing effect between the connector 22 and the fluid conveying mechanism.

[0100] Optionally, the seal 221 may be detachably connected to the joint 22, or may be integrally provided on the joint 22. The seal 221 may be directly connected to the joint 22, or may be restricted to the joint 22 by other components. As an example, the connection method between the seal 221 and the joint 22 may be, but is not limited to, bolt connection, welding, riveting, or clamping.

[0101] The above technical solution sets a seal 221 to reduce the risk of fluid leakage when the fluid conveying mechanism conveys the fluid to the inner cavity 211 of the pressurizing member 21 through the joint 22. This can not only improve the fluid conveying utilization efficiency during the pressurization process, but also reduce the risk of contaminating the battery cell 100 due to fluid leakage.

[0102] In some embodiments, a snap-fit ​​member 222 is disposed on the connector 22 , and the snap-fit ​​member 222 is used for snapping with the fluid conveying mechanism.

[0103] For example, the buckle 222 can be a push buckle, which can automatically lock the connector 22 and the fluid delivery mechanism after the connector 22 is docked with the fluid delivery mechanism, and then unlocked by pressing; the buckle 222 can also be a magnetic buckle, which uses magnetic force to achieve a quick locking connection and is unlocked by applying a pulling force; the buckle 222 can also be a twist buckle, which locks and unlocks the connection by twisting. It is understandable that the above-mentioned buckle 222 is only an example and is not a specific limitation of the embodiments of the present application. When selecting the buckle 222, it can be selected according to the actual application environment.

[0104] Optionally, the fastener 222 may be detachably connected to the joint 22, or may be integrally provided on the joint 22. The fastener 222 may be directly connected to the joint 22, or may be restricted to the joint 22 by other components. As an example, the fastener 222 and the joint 22 may be connected by, but not limited to, bolt connection, welding, riveting, or clamping.

[0105] By providing a snap-fit ​​piece 222 on the connector 22, it is not only beneficial to the connection stability between the connector 22 and the fluid conveying mechanism, but also can greatly simplify the installation and disassembly process between the connector 22 and the fluid conveying mechanism, thereby significantly improving the use efficiency and operation convenience of the battery pressurizing device.

[0106] In some embodiments, the pressurizing member 21 includes a substrate 212 and a cover plate 213. The substrate 212 has an opening on at least one end surface along the first direction X. The cover plate 213 covers the opening and forms an inner cavity 211 with the substrate 212. The connector 22 is disposed on the substrate 212. The substrate 212 is provided with a channel for connecting the inner cavity 211 and the connector 22. The cover plate 213 is configured to squeeze the battery cell 100 when the pressure of the inner cavity 211 reaches a threshold.

[0107] As an example, the substrate 212 has two end surfaces that are arranged opposite to each other along the first direction X. In some examples, one end surface of the substrate 212 has an opening, and the pressure member 21 includes a cover plate 213. In other examples, both end surfaces of the substrate 212 have openings, and the pressure member 21 includes two cover plates 213, and the two cover plates 213 cover the openings on the two end surfaces respectively.

[0108] The materials of the substrate 212 and the cover 213 may be the same or different.

[0109] In some examples, the cover plate 213 may be embedded in the opening and connected to the base plate 212. In other examples, the area of ​​the cover plate 213 may be larger than the area of ​​the opening, and the cover plate 213 may be attached to the end surface.

[0110] The embodiment of the present application can help achieve directional deformation of the pressurizing member 21 by providing the substrate 212 and the cover plate 213, so that the cover plate 213 can effectively pressurize the battery cell 100. In addition, when the cover plate 213 is worn, the cover plate 213 can be replaced, thereby reducing the maintenance cost of the battery pressurizing device.

[0111] In some examples, the connector 22 is disposed on the substrate 212, and the substrate 212 is provided with a channel for connecting the inner cavity 211 and the connector 22, and the cover plate 213 is configured to be able to squeeze the battery cell 100 when the pressure in the inner cavity 211 reaches a threshold value. Based on this, since the channel is disposed on the substrate 212, the risk of interference between the fluid conveying mechanism and the battery cell 100 can be reduced.

[0112] In some embodiments, the elastic modulus of the cover plate 213 is smaller than the elastic modulus of the substrate 212 .

[0113] The cover plate 213 has good elasticity, and when the internal pressure in the accommodation cavity increases, the cover plate 213 can be deformed quickly to transmit the pressure to the battery cell 100. The base plate 212 has great strength and is not easily deformed, which can help to achieve directional deformation of the pressurizing mechanism 20 and increase the rate of increase of the internal pressure in the accommodation cavity.

[0114] The substrate 212 has high strength. When the internal pressure of the accommodating cavity increases, the deformation of the channel is small, which can reduce the risk of sealing failure at the connection between the channel and other components.

[0115] Optionally, the material of the substrate 212 includes at least one of metal and plastic, wherein the metal includes but is not limited to aluminum, aluminum alloy, stainless steel, nickel-plated steel, and the like.

[0116] Optionally, the material of the substrate 212 may include any type of high temperature resistant and non-deformable engineering plastics, such as polyimide, polyphenylene ether resin, and polyetheretherketone.

[0117] Optionally, the material of the substrate 212 may include general plastic with good mechanical strength, such as polypropylene or polyethylene.

[0118] Metals and plastics are easy to process and obtain, which helps to reduce costs.

[0119] In some embodiments, the cover plate 213 is made of an elastic material. The elastic material is easy to expand and deform, and the deformation can be restored. The cover plate 213 is made of an elastic material, which can reduce the threshold requirement and can be used multiple times, thereby increasing the service life of the battery pressurizing device.

[0120] In some embodiments, the elastic material includes rubber. Optionally, the elastic material includes at least one of silicone and ethylene propylene rubber. Optionally, the ethylene propylene rubber includes ethylene propylene diene monomer rubber. These structural materials are easy to purchase, easy to process, and have a low price, which can save costs, and have a stable structure and can be used in multiple processes.

[0121] In some embodiments, the cover plate 213 is attached to an end surface of the substrate 212 .

[0122] For example, the area of ​​the cover plate 213 may be larger than the area of ​​the opening, based on which the cover plate 213 may be attached to the end surface. Attachment may refer to sticking and connecting.

[0123] In the embodiment of the present application, the cover plate 213 may have a larger area. Attaching the cover plate 213 to the end surface can increase the connection area between the cover plate 213 and the substrate 212, improve the connection strength between the cover plate 213 and the substrate 212, reduce the risk of separation of the cover plate 213 and the substrate 212 under the action of internal pressure, and extend the service life of the battery pressurization device.

[0124] In some embodiments, the cover plate 213 is received in the opening, and the outer surface of the cover plate 213 is flush with the end surface.

[0125] The above technical solution can reduce the space occupied by the pressurizing mechanism 20. In addition, when the battery cell 100 is inserted between the pressurizing mechanism 20, the embodiment of the present application can reduce the risk of the battery cell 100 rubbing against the cover plate 213, reduce the wear of the cover plate 213, and increase the service life of the battery pressurizing device.

[0126] In some embodiments, the cover plate 213 is bonded to the substrate 212. In some examples, the cover plate 213 may be bonded to the substrate 212 by an adhesive. In other examples, the cover plate 213 may also be bonded to the substrate 212 by a lamination process or a vulcanization process.

[0127] The bonding process is easy to implement and helps to seal the opening, reducing the risk of air leakage.

[0128] In some embodiments, the plurality of pressurizing mechanisms 20 include two first pressurizing mechanisms 20a and at least one second pressurizing mechanism 20b, and the second pressurizing mechanism 20b is disposed between the two first pressurizing mechanisms 20a. The substrate 212 of the first pressurizing mechanism 20a is provided with an opening on one side end surface along the first direction X, and the cover plate 213 of the first pressurizing mechanism 20a faces the second pressurizing mechanism 20b along the first direction X. The substrate 212 of the second pressurizing mechanism 20b is provided with openings on both side end surfaces along the first direction X, and the second pressurizing mechanism 20b includes two cover plates 213, and the two cover plates 213 cover the two openings of the substrate 212 respectively.

[0129] The second pressurizing mechanism 20b may be one or more. Optionally, the second pressurizing mechanism 20b may be more than one.

[0130] The first pressurizing mechanism 20a includes one cover plate 213 , only one side of which can be used to press the battery cell 100 . The second pressurizing mechanism 20b includes two cover plates 213 , both sides of which along the first direction X can be used to press the battery cell 100 .

[0131] In some examples, the second pressurizing mechanism 20b may include an inner cavity 211, and two cover plates 213 are located on both sides of the inner cavity 211 and are used to close the inner cavity 211. In an alternative example, the second pressurizing mechanism 20b may include two inner cavities 211, and the two cover plates 213 correspond to the two inner cavities 211 respectively.

[0132] The second pressurizing mechanism 20 b can apply pressure to the battery cells 100 on both sides at the same time. Therefore, the embodiment of the present application can reduce the total number of pressurizing mechanisms 20 and simplify the structure of the battery pressurizing device.

[0133] In some embodiments, the cover plate 213 includes a flexible body, which is configured to expand and deform when the pressure of the inner cavity 211 reaches a threshold. The material of the flexible body can be but is not limited to silicone, cowhide, rubber or latex.

[0134] The flexible body is a deformable component that is difficult for fluid media to pass through. The flexible body can adaptively deform according to the shape of the battery cell 100, thereby maintaining the extrusion of the surface of the battery cell 100, improving the uniformity of the force on the battery cell 100, and reducing the generation of extrusion dead angles.

[0135] In some embodiments, the flexible body includes an elastic structure, which can make the flexible body have good elasticity, recover after deformation, and can be used multiple times, thereby increasing the service life of the battery pressurizing device.

[0136] In some embodiments, the supporting mechanism 10 includes a supporting plate 11, an end plate 12 and a guide shaft 13, the end plate 12 is connected to one end of the supporting plate 11 along a first direction X, a plurality of pressurizing mechanisms 20 are located on one side of the end plate 12 along the first direction X, and are disposed on one side of the supporting plate 11 along a second direction Y, the first direction X intersects the second direction Y. The guide shaft 13 extends along the first direction X and is connected to the end plate 12, and the pressurizing mechanism 20 is slidably connected to the guide shaft 13 along the first direction X.

[0137] Exemplarily, the guide shaft 13 may be one or more. The guide rod may be made of hard plastic, light metal, etc. to reduce the overall weight of the support mechanism 10. The support mechanism 10 may be integrally formed. For example, the support mechanism 10 is a plastic part, which may directly form the support plate 11, the end plate 12 and the guide shaft 13 in one piece during the injection molding process. Alternatively, the support mechanism 10 is an assembly, that is, obtained by assembling and combining a separate support plate 11, an end plate 12 and a guide shaft 13.

[0138] In the embodiment of the present application, the structural strength of the bearing mechanism 10 can be improved by connecting the end plate 12 with the guide shaft 13. Compared with the solution of connecting the end plate 12 with the side plate, connecting the end plate 12 with the guide shaft 13 can achieve the effect of reducing weight. The guide shaft 13 can limit the bracket and improve the stability of the battery cell 100 during the pressurization process.

[0139] Optionally, there may be two end plates 12 , the two end plates 12 are respectively connected to two ends of the bearing plate 11 along the first direction X, and the plurality of pressurizing mechanisms 20 are located between the two end plates 12 along the first direction X.

[0140] In the embodiment of the present application, the pressurizing member 21 can be moved along the first direction X as needed to change the spacing between the pressurizing mechanisms 20 , so that the battery pressurizing device can adapt to battery cells 100 of different thicknesses.

[0141] In some embodiments, the pressure mechanism 20 is fixed to the carrier plate 11. Optionally, the pressure mechanism 20 is fixed to the carrier plate 11 by fastener connection, clamping or other methods. Optionally, the pressure mechanism 20 is fixed to the carrier plate 11 by screws or buckles.

[0142] When the pressurizing mechanism 20 applies pressure to the battery cell 100 , the supporting plate 11 may limit the movement of the pressurizing mechanism 20 along the first direction X, so as to reduce the risk of the pressurizing mechanism 20 being offset in the first direction X.

[0143] In some embodiments, when the specifications of the battery cell 100 are changed, such as when the thickness becomes larger or smaller, the fixing between the pressurizing mechanism 20 and the carrier plate 11 can be released first (for example, by removing the screws), and then the pressurizing mechanism 20 is moved along the guide shaft 13. When the pressurizing mechanism 20 moves to the set position, the pressurizing mechanism 20 and the carrier plate 11 are fixed again.

[0144] In some embodiments, the battery pressurizing device further includes a limit block 30 , which is detachably connected between the end plate 12 and the pressurizing mechanism 20 .

[0145] When the spacing or number of the pressurizing mechanisms 20 changes, the end plate 12 can apply a resisting force to the pressurizing mechanism 20 by replacing the limit blocks 30 of different thicknesses without removing and replacing the entire end plate 12 from the supporting mechanism 10, thereby effectively improving the convenience of use of the battery pressurizing device. The thickness of the limit block 30 refers to the size of the limit block 30 along the first direction X.

[0146] Optionally, the limit block 30 can be but is not limited to being made of metal or non-metallic materials. For example, the metal material can be steel, iron, copper, copper alloy, aluminum or aluminum alloy, etc.; the non-metallic material can be polyethylene, polypropylene, polyvinyl chloride or wood, etc.

[0147] In some embodiments, the connector 22 is connected to an end of the pressurizing mechanism 20 along the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0148] As mentioned above, the supporting plate 11 is arranged on one side of the multiple pressurizing mechanisms 20 along the second direction Y. Therefore, connecting the connector 22 to the end of the pressurizing mechanism 20 along the third direction Z can provide a larger setting space for the connector 22 and reduce the difficulty of setting the connector 22.

[0149] In some embodiments, there are multiple joints 22, and the multiple joints 22 are arranged at intervals along the second direction Y.

[0150] For example, multiple connectors 22 can be connected to the same gas delivery device or to different gas delivery devices. The specific number of connectors 22 can be two, three, four or more, which can be selected according to the actual application environment.

[0151] By increasing the number of the joints 22 , the pressurizing efficiency of the battery pressurizing device can be further improved.

[0152] In one example, a plurality of pressurizing mechanisms 20 are connected in parallel to the same gas transmission device to improve the consistency of the internal pressures of the plurality of pressurizing mechanisms 20 .

[0153] An embodiment of the present application further provides a battery production system, which includes a fluid conveying mechanism and a battery pressurizing device provided by any of the aforementioned embodiments, wherein the fluid conveying mechanism is connected to the connector 22 .

[0154] The fluid delivery device is used to deliver fluid to the inner cavity 211 of the pressurizing member 21 .

[0155] Optionally, the fluid delivery device comprises a gas delivery device.

[0156] In some embodiments, the fluid delivery mechanism includes a delivery pipe and a regulating valve. The delivery pipe is connected to the connector 22, and the regulating valve is disposed on the delivery pipe.

[0157] The regulating valve is used to adjust the flow rate and pressure of the fluid to ensure the accuracy and stability of the fluid delivery during the pressurization process. By adjusting the regulating valve, the operator can finely adjust the delivery of the fluid according to the specific requirements of the pressurization of the battery cell 100, thereby achieving precise control of the pressurization intensity and time.

[0158] According to different operating requirements and working environments, there are many alternatives for the design of fluid delivery mechanisms. For example, in addition to the traditional manual regulating valve, an electronically controlled regulating valve can also be used to achieve more precise and automated fluid control.

[0159] Optionally, the regulating valve may be, but is not limited to, a ball valve, a butterfly valve, a diaphragm valve or a solenoid valve.

[0160] The above technical solution provides a regulating valve so that the speed and pressure of fluid delivery can be accurately adjusted according to actual needs, which significantly improves the control accuracy and flexibility of the pressurization process.

[0161] In some embodiments, the battery production system further includes a detection component, which is disposed in the delivery pipe and located between the regulating valve and the joint 22 , and is used to detect fluid pressure.

[0162] The detection component can monitor the fluid pressure in real time, significantly improving the monitoring and control capabilities of the battery pressurization process. The real-time pressure monitoring data not only improves the consistency of the pressurization effect, but also enhances the response capability to abnormal fluid pressure, helping to prevent the risk of damage to the battery cell 100 due to improper pressurization.

[0163] Depending on the application requirements and operating conditions, the selection and configuration of the detection components can vary. For example, in addition to the basic pressure detector, the detection component can also integrate a temperature sensor or a flow sensor to provide a more comprehensive fluid state monitoring. In addition, the technology and model of the detection component can be selected according to the requirements of monitoring accuracy, response speed and environmental adaptability.

[0164] In some embodiments, the battery production system further includes a processing device for performing specific processing on the battery cell 100. For example, in some examples, the processing device may be a negative pressure device, which is used to extract the gas inside the battery cell 100 during the formation process of the battery cell 100. In other examples, the processing device may be a liquid injection device, which is used to inject electrolyte into the interior of the battery cell 100.

[0165] In order to better understand the battery pressurizing device provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery pressurizing device in actual application is provided here for illustration.

[0166] An embodiment of the present application provides a battery pressurizing device, which includes a supporting mechanism 10 and a plurality of pressurizing mechanisms 20. The plurality of pressurizing mechanisms 20 are disposed on the supporting mechanism 10 and arranged along a first direction X. A battery cell 100 is placed between two adjacent pressurizing mechanisms 20. Each pressurizing mechanism 20 includes a pressurizing member 21 and a magnetic connector 22 disposed on the pressurizing member 21. The magnetic connector 22 is used to connect an external fluid delivery mechanism with an inner cavity 211 of the pressurizing member 21.

[0167] The bearing mechanism 10 includes a bearing plate 11, an end plate 12, a guide shaft 13 and a stopper 30. The end plate 12 is connected to one end of the bearing plate 11 along a first direction X. A plurality of pressurizing mechanisms 20 are located on one side of the end plate 12 along the first direction X and are disposed on one side of the bearing plate 11 along a second direction Y. The first direction X intersects with the second direction Y. The guide shaft 13 extends along the first direction X and is connected to the end plate 12. The pressurizing mechanism 20 is slidably connected to the guide shaft 13 along the first direction X. The stopper 30 is detachably connected between the end plate 12 and the pressurizing mechanism 20.

[0168] The pressurizing member 21 includes a substrate 212 and a flexible body. The substrate 212 has an opening on at least one end surface along the first direction X. The flexible body covers the opening and encloses the substrate 212 to form an inner cavity 211. The magnetic connector 22 is provided on the substrate 212. The substrate 212 is provided with a channel for connecting the inner cavity 211 and the magnetic connector 22. The flexible body is configured to expand and deform when the pressure of the inner cavity 211 reaches a threshold. The magnetic connector 22 is provided with a sealing member 221 and a snap member 222. The snap member 222 is used to snap with the fluid conveying mechanism.

[0169] The above technical solution sets a positioning structure on the connector 22, so that during the docking process between the connector 22 and the fluid delivery mechanism, the positioning structure can cooperate with the fluid delivery mechanism, so that the connector 22 can quickly and accurately complete the docking, reduce the time required for the docking process between the connector 22 and the fluid delivery mechanism, and reduce the risk of pressurization failure caused by misalignment of the connector 22 and the fluid delivery mechanism, thereby effectively improving the pressurization efficiency and reliability of the battery pressurization device. In addition, by setting up multiple pressurization mechanisms 20, multiple pressure application sites can be provided, thereby improving the uniformity of the pressure on multiple battery cells 100.

[0170] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery pressurizing device, characterized in that: include: Carrying mechanism; as well as A plurality of pressurizing mechanisms are provided on the carrying mechanism and arranged along the first direction, and a battery cell is placed between two adjacent pressurizing mechanisms, and each pressurizing mechanism comprises a pressurizing member and a joint provided on the pressurizing member, and the joint is used to connect an external fluid conveying mechanism with an inner cavity of the pressurizing member; Wherein, the joint comprises a positioning structure, and the positioning structure is used to cooperate with the fluid conveying mechanism.

2. The battery pressurizing device according to claim 1, characterized in that: At least a portion of the connector is configured as a magnetic member.

3. The battery pressurizing device according to claim 1, characterized in that: The joint is provided with a sealing member, and the sealing member is sleeved on the joint.

4. The battery pressurizing device according to claim 1, characterized in that: The joint is provided with a snap-fit ​​piece, and the snap-fit ​​piece is used for snapping with the fluid conveying mechanism.

5. The battery pressurizing device according to any one of claims 1 to 4, characterized in that: The pressure member comprises a base plate and a cover plate, wherein at least one end surface of the base plate along the first direction has an opening, and the cover plate covers the opening and encloses the base plate to form the inner cavity; The connector is disposed on the substrate, the substrate is provided with a channel for connecting the inner cavity and the connector, and the cover plate is configured to squeeze the battery cell when the pressure of the inner cavity reaches a threshold.

6. The battery pressurizing device according to claim 5, characterized in that: The elastic modulus of the cover plate is smaller than the elastic modulus of the base plate.

7. The battery pressurizing device according to claim 5, characterized in that: The cover plate is attached to the end surface of the substrate; or, The cover plate is accommodated in the opening, and the outer surface of the cover plate is flush with the end surface.

8. The battery pressurizing device according to claim 5, characterized in that: The plurality of pressurizing mechanisms include two first pressurizing mechanisms and at least one second pressurizing mechanism, wherein the second pressurizing mechanism is disposed between the two first pressurizing mechanisms; The opening is provided on one end surface of the substrate of the first pressurizing mechanism along the first direction, and the cover plate of the first pressurizing mechanism faces the second pressurizing mechanism along the first direction; The openings are provided on both side end surfaces of the substrate of the second pressurizing mechanism along the first direction. The second pressurizing mechanism comprises two cover plates, and the two cover plates respectively cover the two openings of the substrate.

9. The battery pressurizing device according to claim 5, characterized in that: The cover plate includes a flexible body, and the flexible body is configured to expand and deform when the pressure of the inner cavity reaches a threshold value.

10. The battery pressurizing device according to claim 9, characterized in that: The flexible body includes an elastic structure.

11. The battery pressurizing device according to claim 1, characterized in that: The bearing mechanism comprises a bearing plate, an end plate and a guide shaft; The end plate is connected to one end of the bearing plate along the first direction, the plurality of pressurizing mechanisms are located on one side of the end plate along the first direction, and are arranged on one side of the bearing plate along the second direction, and the first direction intersects with the second direction; The guide shaft extends along the first direction and is connected to the end plate, and the pressurizing mechanism is slidably connected to the guide shaft along the first direction.

12. The battery pressurizing device according to claim 11, characterized in that: The battery pressurizing device further comprises a limit block, and the limit block is detachably connected between the end plate and the pressurizing mechanism.

13. The battery pressurizing device according to claim 11, characterized in that: The joint is connected to an end of the pressurizing mechanism along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

14. The battery pressurizing device according to claim 13, characterized in that: There are multiple joints, and the multiple joints are arranged at intervals along the second direction.

15. A battery production system, characterized in that: include: The battery pressurizing device according to any one of claims 1 to 14; The fluid conveying mechanism is connected to the joint.

16. The battery production system according to claim 15, characterized in that: The fluid delivery mechanism comprises a delivery pipe and a regulating valve, wherein the delivery pipe is connected to the joint, and the regulating valve is arranged on the delivery pipe.

Images