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 first joint, the bearing mechanism is provided with a gas channel. The multiple pressurizing mechanisms are arranged on the bearing mechanism and arranged in the first direction, the pressurizing mechanisms are provided with containing cavities, and the containing cavities of the multiple pressurizing mechanisms communicate with the gas channel. The first connector is arranged on the bearing mechanism and communicates with the gas channel. The first connector is used for being connected to external gas transmission equipment. And the pressurizing mechanisms can expand and deform under the action of internal air pressure of the accommodating cavities and apply pressure to the battery monomers arranged between the pressurizing mechanisms.

Description

Technical Field

[0001] The present application relates to the field of batteries, 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, 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 improve the uniformity of the pressure on battery cells.

[0005] In a first aspect, the present application provides a battery pressurizing device, which includes a carrying mechanism, a plurality of pressurizing mechanisms, and a first connector. The carrying mechanism is provided with a gas channel. A plurality of pressurizing mechanisms are arranged on the carrying mechanism and arranged along a first direction, and the pressurizing mechanism is provided with a receiving cavity, and the receiving cavities of the plurality of pressurizing mechanisms are connected to the gas channel. The first connector is provided on the carrying mechanism and is connected to the gas channel, and the first connector is used to connect to an external gas transmission device. The pressurizing mechanism can expand and deform under the action of the internal air pressure of the receiving cavity, and pressurize the battery cells arranged between the pressurizing mechanisms.

[0006] When the battery cells need to be pressurized, multiple battery cells can be inserted between multiple pressurizing mechanisms, and the first connector can be connected to the gas transmission device. The gas transmission device inputs gas into the accommodating chambers of the multiple pressurizing mechanisms through the first connector and the gas channel. As the internal gas pressure of the accommodating chamber increases, the pressurizing mechanism gradually expands and deforms and squeezes the battery cells, thereby applying pressure to the battery cells.

[0007] The above technical solution can provide multiple pressure sites by setting multiple pressure mechanisms, thereby improving the uniformity of pressure on multiple battery cells; the battery cells are inserted between the pressure mechanisms, and the offset of the battery cells will be limited by the pressure mechanisms on both sides. Therefore, the above technical solution can also reduce the offset of the battery cells when they are pressed, and reduce the risk of misalignment between the battery cells and other components. The pressure applied by the pressure mechanism to the battery cells is related to the amount of gas provided by the gas transmission device. By adjusting the amount of gas input by the gas transmission device, the pressure applied by the pressure mechanism to the battery cells can be effectively controlled, thereby achieving controllability of the pressure and reducing the risk of electrolyte overflow due to excessive pressure. The above technical solution can enable the gas transmission device to simultaneously transmit gas to the accommodating chambers of multiple pressure mechanisms by setting a first joint and a gas channel, thereby realizing centralized charging and discharging of the battery pressure device, improving the integration of the battery pressure device, and simplifying the structure of the battery pressure device; in addition, integrating the gas channel on the support mechanism can also simplify the overall structure of the battery pressure device.

[0008] In some embodiments, the bearing mechanism includes a first surface and a second surface arranged opposite to each other along a second direction, the first direction being perpendicular to the second direction. A plurality of pressurizing mechanisms are arranged on a side of the first surface away from the second surface; in the second direction, the gas channel is located between the first surface and the second surface.

[0009] The above technical solution sets the gas channel between the first surface and the second surface, hides the pipeline layout, reduces the risk of interference between the pipeline structure and the pressurizing mechanism and the battery cell, improves the integration of the battery pressurizing device, and simplifies the structure of the battery pressurizing device.

[0010] In some embodiments, at least a portion of the first connector protrudes from the second surface along the second direction. The portion of the first connector protruding from the second surface can be used to connect to a gas delivery device.

[0011] In some embodiments, the first surface is used to support the battery cell, so as to improve the stability of the battery cell and reduce the risk of the battery cell shifting during the process of pressurizing the battery cell.

[0012] In some embodiments, the bearing mechanism includes a first bearing plate, a second bearing plate, and a ventilation duct. The first bearing plate includes a first surface. The second bearing plate and the first bearing plate are spaced apart in the second direction, and the second bearing plate is located on a side of the first bearing plate away from the pressurizing mechanism, the second bearing plate includes a second surface, and the first joint is provided on the second bearing plate. The ventilation duct is provided between the first bearing plate and the second bearing plate and connected to the first joint, and a gas passage is provided inside the ventilation duct.

[0013] The first carrier plate separates the ventilation duct from the pressurizing mechanism to reduce the risk of interference between the ventilation duct and the battery cell. The ventilation duct is centrally arranged between the first carrier plate and the second carrier plate, which can improve the integration of the battery pressurizing device. The first carrier plate and the second carrier plate can protect the ventilation duct from both sides to reduce the risk of external impact on the ventilation duct and improve the service life and sealing of the ventilation duct.

[0014] In some embodiments, the bearing mechanism includes a first bearing plate, the first bearing plate includes a first surface and a second surface, and a gas channel is formed inside the first bearing plate. Directly forming the gas channel inside the first bearing plate can save pipelines, reduce the volume and weight of the battery pressurizing device, simplify the structure of the battery pressurizing device, and reduce the cost of the battery pressurizing device.

[0015] In some embodiments, the supporting mechanism includes a first supporting plate and a second supporting plate, the first supporting plate and the second supporting plate are stacked and enclosed along the second direction to form a gas channel. The first supporting plate includes a first surface, the second supporting plate includes a second surface, and the second supporting plate is located on a side of the first supporting plate away from the pressurizing mechanism in the second direction.

[0016] The gas channel is formed by enclosing the first supporting plate and the second supporting plate, which can save pipelines, reduce the volume and weight of the battery pressurizing device, simplify the structure of the battery pressurizing device, and reduce the cost of the battery pressurizing device.

[0017] In some embodiments, the gas channel connects the accommodating chambers of the multiple pressurizing mechanisms in parallel to improve the consistency of the internal pressures of the accommodating chambers of the multiple pressurizing mechanisms and improve the uniformity of the pressures applied by the multiple pressurizing mechanisms to the battery cells.

[0018] In some embodiments, the gas channel includes a converging channel and a plurality of branching channels, the plurality of branching channels are connected to the converging channel in parallel, the converging channel is connected to the first joint, and the accommodating chamber of each pressurizing mechanism is connected to the converging channel through at least one branching channel.

[0019] The gas input by the gas transmission device enters the converging channel through the first joint, and then enters the accommodating chambers of the multiple pressurizing mechanisms through the multiple branching channels to increase the internal gas pressure of the accommodating chambers of the multiple pressurizing mechanisms.

[0020] In some embodiments, the accommodating chamber of each pressurizing mechanism is connected to the converging channel through at least two branching channels.

[0021] The above technical solution can increase the passage for gas to enter the accommodating cavity, thereby increasing the gas transmission rate and improving the efficiency of the expansion and deformation of the pressurizing mechanism, thereby saving work time.

[0022] In some embodiments, the battery pressurizing device further comprises a plurality of second connectors disposed on the supporting mechanism, and the accommodating cavity of each pressurizing mechanism is connected to the gas channel via at least one second connector. The second connector can play a role of switching to facilitate the communication between the accommodating cavity and the gas channel.

[0023] In some embodiments, the supporting mechanism includes a first supporting plate for supporting the battery cells, and the plurality of pressurizing mechanisms are located on the same side of the first supporting plate along the second direction. The pressurizing mechanism is provided with a vent, and the vent is used to connect the gas channel and the accommodating cavity.

[0024] In some embodiments, in the second direction, the vent is provided on the side of the pressurizing mechanism facing the first carrier plate, which can reduce the distance between the vent and the gas channel, and help simplify the structure for connecting the vent and the gas channel. In other embodiments, the vent is provided on one side of the pressurizing mechanism along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0025] In some embodiments, the pressurizing mechanism includes a substrate and a cover plate, the end surface of the substrate along the first direction has an opening, the cover plate covers the opening and forms a receiving cavity together with the substrate, and the elastic modulus of the substrate is greater than that of the cover plate.

[0026] 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.

[0027] In some embodiments, the cover plate is attached to the end surface of the substrate, which can increase the connection area between the cover plate and the substrate and improve the connection strength between the cover plate and the substrate. In other embodiments, the cover plate is accommodated in the opening, and the outer surface of the cover plate is flush with the end surface, so as to reduce the risk of the battery cell rubbing against the cover plate when the battery cell is inserted between the pressurizing mechanisms, reduce the wear of the cover plate, and improve the service life of the battery pressurizing device.

[0028] In some embodiments, the substrate is provided with a vent for connecting the gas channel and the accommodating cavity. The substrate has high strength, and when the internal pressure of the accommodating cavity increases, the deformation of the vent is small, which can reduce the risk of sealing failure of the vent.

[0029] In some embodiments, both end surfaces of the substrate along the first direction are provided with openings, and the pressurizing mechanism includes two cover plates, which respectively cover the two openings of the substrate. The pressurizing mechanism can simultaneously apply pressure to the battery cells on both sides, thereby reducing the total number of pressurizing mechanisms and simplifying the structure of the battery pressurizing device.

[0030] In some embodiments, the bearing mechanism includes a first bearing plate and two side plates; the first bearing plate is used to bear the battery cells, and the multiple pressurizing mechanisms are located on the same side of the first bearing plate along the second direction. In the second direction, the two side plates are arranged on the side of the first bearing plate facing the multiple pressurizing mechanisms; the two side plates are arranged at intervals along the third direction, and the first direction, the second direction and the third direction intersect each other. In the third direction, the multiple pressurizing mechanisms are arranged between the two side plates and connected to the two side plates.

[0031] The side plate can protect the pressurizing mechanism and the battery cell from both sides of the third direction, reducing the risk of damage to the pressurizing mechanism and the battery cell. The side plate can also limit the pressurizing mechanism to reduce the deviation of the pressurizing mechanism during the pressurization process.

[0032] In some embodiments, the battery pressurizing device includes a plurality of limit assemblies spaced apart along the first direction, each limit assembly includes two limit components, the two limit components are opposite to each other along the third direction and are respectively arranged on two side plates. Each limit component is provided with a slot, and the two ends of the pressurizing mechanism along the third direction are respectively inserted into the slots of the two limit components of the limit assembly.

[0033] The pressurizing mechanism inserted into the card slot will be restricted by the limiting component in the first direction; when the pressurizing mechanism applies pressure to the battery cell, the limiting component can limit the movement of the pressurizing mechanism along the first direction to reduce the risk of the pressurizing mechanism deviating in the first direction. The pressurizing mechanism is fixed by plugging with the limiting component, and the plugging method is easy to disassemble and assemble, which can simplify the assembly efficiency and reduce the difficulty of repairing and replacing the pressurizing mechanism.

[0034] In some embodiments, the limiting component is movably connected to the side plate along the first direction.

[0035] The above technical solution can move the limiting component along the first direction as needed, thereby changing the spacing between the pressurizing mechanisms, so that the battery pressurizing device can adapt to battery cells of different thicknesses.

[0036] In some embodiments, the limiting component includes two protrusions arranged along the first direction, and a slot is formed between the two protrusions. The protrusion provided on one side plate and located at the outermost end in the first direction is connected to the protrusion provided on the other side plate and located at the outermost end in the first direction.

[0037] The protrusions at the outermost ends of the two side plates are connected as one to form a limit plate, which can limit the expansion deformation of the outermost pressurizing mechanism, making it easier for the pressurizing mechanism to deform toward the battery cell, thereby improving the deformation efficiency of the pressurizing mechanism.

[0038] In some embodiments, the pressurizing mechanism includes a substrate and a cover plate, the end surface of the substrate along the first direction has an opening, the cover plate covers the opening and forms a receiving cavity with the substrate. The elastic modulus of the substrate is greater than the elastic modulus of the cover plate. The substrate is inserted into the card slot.

[0039] The substrate has a high elastic modulus and deforms less under the internal pressure of the accommodating cavity, thereby reducing the pressure exerted by the substrate on the limiting component, reducing the deformation of the limiting component, and improving the stability of the cooperation between the substrate and the slot.

[0040] In a second aspect, the present application provides a battery production system, comprising a battery pressurizing device and a gas delivery device provided in any embodiment of the first aspect, wherein the gas delivery device is used to connect to a first joint and is capable of delivering or exhausting gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0042] Figure 1 A schematic diagram of the structure of a battery pressurizing device provided in some embodiments of the present application;

[0043] Figure 2 for Figure 1 A schematic diagram of the battery pressurizing device shown when viewed in a first direction;

[0044] Figure 3 for Figure 1 A schematic diagram of the battery pressurizing device shown when viewed in a third direction;

[0045] Figure 4 A schematic top view of a battery pressurizing device provided in some embodiments of the present application;

[0046] Figure 5 A schematic diagram of the structure of a pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application;

[0047] Figure 6 for Figure 5 A schematic cross-sectional view of the pressurizing mechanism shown;

[0048] Figure 7 A partial cross-sectional schematic diagram of a ventilation duct of a battery pressurizing device provided in some embodiments of the present application;

[0049] Figure 8 A schematic cross-sectional view of a pressurizing mechanism of a battery pressurizing device provided in some other embodiments of the present application;

[0050] Fig. 9 for Figure 1 An enlarged schematic diagram at the circle frame;

[0051] Fig.10A schematic cross-sectional view of a side plate and a limiting component of a battery pressurizing device provided in some embodiments of the present application;

[0052] Fig.11 It is a schematic diagram of the structure of a battery pressurizing device according to some other embodiments of the present application;

[0053] Fig.12 for Fig.11 A schematic cross-sectional view of the supporting mechanism shown;

[0054] Fig.13 for Fig.11 A bottom view of the first carrier plate shown;

[0055] Fig.14 It is a schematic diagram of the structure of a battery pressurizing device according to some other embodiments of the present application;

[0056] Fig.15 for Fig.14 A schematic cross-sectional view of a first carrier plate shown;

[0057] Fig.16 A schematic diagram of the structure of a battery production system provided for some embodiments of the present application.

[0058] In the drawings, the drawings are not necessarily drawn to scale.

[0059] The reference numerals are as follows:

[0060] 1. Battery pressurizing device;

[0061] 2. Carrying mechanism; 20a. First surface; 20b. Second surface; 21. Gas channel; 211. Converging channel; 212. Diverting channel; 22. First carrying plate; 221. First recess; 23. Second carrying plate; 231. Second recess; 24. Ventilation duct; 241. Converging pipe; 242. Diverting pipe; 25. Support plate; 26. Side plate; 261. Guide groove;

[0062] 3. Pressurizing mechanism; 31. Accommodating chamber; 32. Ventilation port; 33. Base plate; 331. End surface; 34. Cover plate; 341. Outer surface;

[0063] 4. First joint;

[0064] 5. Second joint;

[0065] 6. Limiting assembly; 61. Limiting member; 611. Slot; 612. Protrusion; 613. Limiting body;

[0066] 100. Gas transmission equipment; 200. Battery cells; 300. Processing equipment;

[0067] X, first direction; Z, second direction; Y, third direction. DETAILED DESCRIPTION

[0068] 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 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.

[0069] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; 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" in the specification and claims of this application and the above-mentioned drawings and any variations thereof 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The term "plurality" used in the present application refers to two or more (including two).

[0075] 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.

[0076] 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.

[0077] The production process of battery cells generally includes 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 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 batteries. 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, and rate performance of the battery cell.

[0078] 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.

[0079] Therefore, in 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.

[0080] In some pressurizing devices, a pressure plate is usually used to squeeze a row of battery cells from one side to apply pressure to the battery cells. However, the pressure is gradually transmitted from the pressure plate to multiple battery cells, which will cause uneven pressure on multiple battery cells, and the pressure on battery cells far away from the pressure plate is difficult to control. In addition, when the pressure plate applies pressure, the offset of multiple battery cells in the arrangement direction will accumulate, causing a larger offset of the battery cell closest to the pressure plate, which will affect the connection between the battery cell and external equipment (such as the probe of the formation equipment).

[0081] In view of this, an embodiment of the present application provides a battery pressurizing device, which applies pressure to the battery cell by utilizing the expansion and deformation of the pressurizing mechanism by providing a pressurizing mechanism that can expand and deform under the action of air pressure. Multiple pressurizing mechanisms can provide multiple pressurizing sites, thereby improving the uniformity of the pressure on the battery cell and reducing the displacement of the battery cell when under pressure. The pressure applied by the pressurizing mechanism to the battery cell is related to the externally applied air pressure. By adjusting the air pressure, the pressure applied by the pressurizing mechanism to the battery cell can be effectively controlled. The embodiment of the present application also integrates the gas channel for supplying air to the pressurizing mechanism on the supporting mechanism for supporting the pressurizing mechanism, thereby simplifying the overall structure of the battery pressurizing device.

[0082] The battery pressurizing device disclosed in the embodiment of the present application can be applied to the battery formation process, and can also be applied to other processes of the battery. For example, the battery pressurizing device in the embodiment of the present application can also be used in the liquid injection process; specifically, in the liquid injection process, the liquid injection equipment injects the electrolyte into the interior of the battery cell at a high pressure and high speed, thereby causing the internal pressure of the battery cell to increase, and the battery pressurizing device in the embodiment of the present application can pressurize the battery cell from the outside to offset the internal pressure of the battery cell and reduce the deformation of the battery cell.

[0083] Figure 1 A schematic diagram of the structure of a battery pressurizing device provided in some embodiments of the present application; Figure 2 for Figure 1 A schematic diagram of the battery pressurizing device shown when viewed in a first direction; Figure 3 for Figure 1 A schematic diagram of the battery pressurizing device shown when viewed in a third direction; Figure 4 A schematic top view of a battery pressurizing device provided in some embodiments of the present application; Figure 5 A schematic diagram of the structure of a pressurizing mechanism of a battery pressurizing device provided in some embodiments of the present application; Figure 6 for Figure 5 A schematic cross-sectional view of the pressurizing mechanism shown; Figure 7 A partial cross-sectional schematic diagram of a ventilation duct of a battery pressurizing device provided in some embodiments of the present application.

[0084] Reference Figures 1 to 7The battery pressurizing device 1 provided in the embodiment of the present application includes a supporting mechanism 2, a plurality of pressurizing mechanisms 3 and a first connector 4. The supporting mechanism 2 is provided with a gas channel 21. The plurality of pressurizing mechanisms 3 are arranged on the supporting mechanism 2 and arranged along the first direction X. The pressurizing mechanism 3 is provided with a accommodating cavity 31, and the accommodating cavities 31 of the plurality of pressurizing mechanisms 3 are connected to the gas channel 21. The first connector 4 is provided on the supporting mechanism 2 and is connected to the gas channel 21, and the first connector 4 is used to connect to an external gas transmission device 100. The pressurizing mechanism 3 can expand and deform under the action of the internal air pressure of the accommodating cavity 31, and pressurize the battery monomer 200 arranged between the pressurizing mechanisms 3.

[0085] The supporting mechanism 2 can be used to support multiple pressurizing mechanisms 3. As an example, when the battery cell 200 needs to be pressurized, the supporting mechanism 2 can also be used to support the battery cell 200. Of course, the supporting mechanism 2 can directly support the battery cell 200 or indirectly support the battery cell 200 through other components (such as the pressurizing mechanism 3).

[0086] The support mechanism 2 may be provided with one or more gas channels 21. The gas channels 21 of the present application may be formed in a variety of ways, for example, by integrating pipelines inside the support mechanism 2 to form the gas channels 21.

[0087] The pressing mechanism 3 may be fixedly connected to the supporting mechanism 2. Alternatively, the position of the pressing mechanism 3 on the supporting mechanism 2 is adjustable along the first direction X.

[0088] The pressurizing mechanism 3 may be an integrated component, or may be formed by connecting a plurality of independent components.

[0089] The number of the accommodating chamber 31 of the pressurizing mechanism 3 may be one or more.

[0090] The gas channel 21 can connect the accommodating chambers 31 of multiple pressurizing mechanisms 3 in series, in parallel or in mixed connection, where mixed connection means both series connection and parallel connection.

[0091] For example, after the internal air pressure of the accommodating chamber 31 reaches a threshold value, the pressurizing mechanism 3 can expand and deform; as the internal air pressure gradually increases, the expansion and deformation of the pressurizing mechanism 3 increases. The threshold value design may be different according to different design requirements. As an example, the threshold value may depend on the material of the pressurizing mechanism 3.

[0092] Under the action of the internal air pressure, at least part of the cavity wall of the accommodating cavity 31 is deformed. For example, after the internal air pressure of the accommodating cavity 31 exceeds a threshold, the part of the cavity wall of the accommodating cavity 31 opposite to the battery cell 200 is deformed and exerts pressure on the battery cell 200, and other parts of the cavity wall of the accommodating cavity 31 may be deformed or not.

[0093] The gas delivery device 100 may only input gas into the accommodating chamber 31. Alternatively, the gas delivery device 100 may both input gas into the accommodating chamber 31 and extract gas from the accommodating chamber 31.

[0094] Exemplarily, when the battery cells 200 need to be pressurized, a plurality of battery cells 200 may be inserted between a plurality of pressurizing mechanisms 3 , so that both sides of each battery cell 200 along the first direction X are provided with a pressurizing mechanism 3 .

[0095] Only one battery cell 200 may be inserted between two adjacent pressurizing mechanisms 3 , or two or more battery cells 200 may be inserted simultaneously. As an example, in the first direction X, adjacent battery cells 200 are separated by the pressurizing mechanisms 3 .

[0096] When the battery cells 200 need to be pressurized, multiple battery cells 200 can be inserted between multiple pressurizing mechanisms 3, and the first connector 4 can be connected to the gas transmission device 100. The gas transmission device 100 inputs gas into the accommodating chambers 31 of the multiple pressurizing mechanisms 3 through the first connector 4 and the gas channel 21. As the internal gas pressure of the accommodating chamber 31 increases, the pressurizing mechanism 3 gradually expands and deforms and squeezes the battery cells 200, thereby applying pressure to the battery cells 200.

[0097] The embodiment of the present application can provide multiple pressure sites by setting multiple pressure mechanisms 3, thereby improving the uniformity of pressure on multiple battery cells 200; the battery cells 200 are inserted between the pressure mechanisms 3, and the offset of the battery cells 200 will be limited by the pressure mechanisms 3 on both sides. Therefore, the embodiment of the present application can also reduce the offset of the battery cells 200 when under pressure, and reduce the risk of misalignment between the battery cells 200 and other components. The pressure applied by the pressure mechanism 3 to the battery cells 200 is related to the amount of gas provided by the gas transmission device 100. By adjusting the amount of gas input by the gas transmission device 100, the pressure applied by the pressure mechanism 3 to the battery cells 200 can be effectively controlled, thereby achieving controllability of the pressure and reducing the risk of electrolyte overflow due to excessive pressure. The embodiment of the present application provides a first connector 4 and a gas channel 21, so that the gas delivery device 100 can simultaneously deliver gas to the accommodating chambers 31 of multiple pressurizing mechanisms 3, thereby realizing centralized charging and discharging of the battery pressurizing device 1, improving the integration of the battery pressurizing device 1, and simplifying the structure of the battery pressurizing device 1; in addition, integrating the gas channel 21 on the supporting mechanism 2 can also simplify the overall structure of the battery pressurizing device 1.

[0098] The method of using gas pressurization is simple, easy to operate and low-cost; in addition, gas pressurization involves fewer equipment, which can reduce the floor space and save plant layout space.

[0099] In some embodiments, the expansion deformation of the pressurizing mechanism 3 may be an elastically recoverable deformation.

[0100] In some embodiments, the battery pressurizing device 1 may be used in a battery formation process to squeeze out the gas inside the battery cell 200 during the formation process.

[0101] In some embodiments, the battery pressurizing device 1 may be used in a battery injection process to offset the positive pressure applied by the injection equipment to the inside of the battery cell 200 during the injection process, thereby reducing deformation of the outer shell of the battery cell 200 .

[0102] In some embodiments, after the pressurization-related process is completed, the gas in the accommodating chamber 31 of the pressurization mechanism 3 is released. At this time, the battery pressurization device 1 of the embodiment of the present application can also be used as a conventional tray for carrying battery cells 200. The battery pressurization device 1 can be circulated along the production line, thereby improving production capacity and logistics line planning.

[0103] In some embodiments, the battery pressurizing device 1 can also be applied to other scenarios where the battery cell 200 needs to be pressurized, for example, it can be applied to scenarios where the battery cell 200 is subjected to long-term charge and discharge cycles. In these scenarios, the pressurizing mechanism 3 pressurizes the battery cell 200, so that the positive and negative electrodes of the battery cell 200 fit closely with the separator, improving the uniformity of the interface reaction and increasing the service life of the battery.

[0104] In some embodiments, the supporting mechanism 2 includes a first surface 20a and a second surface 20b arranged opposite to each other along a second direction Z, and the first direction X is perpendicular to the second direction Z. A plurality of pressurizing mechanisms 3 are arranged on a side of the first surface 20a away from the second surface 20b. In the second direction Z, the gas channel 21 is located between the first surface 20a and the second surface 20b.

[0105] In the embodiment of the present application, the gas channel 21 can be set between the first surface 20a and the second surface 20b to hide the pipeline layout, reduce the risk of interference between the pipeline structure and the pressurizing mechanism 3 and the battery cell 200, improve the integration of the battery pressurizing device 1, and simplify the structure of the battery pressurizing device 1.

[0106] Optionally, when the battery pressurizing device 1 carries the battery cell 200 , the second direction Z may be parallel to the vertical direction.

[0107] Optionally, the first surface 20a is parallel to the second surface 20b.

[0108] Optionally, both the first surface 20a and the second surface 20b are planes perpendicular to the second direction Z.

[0109] In some embodiments, at least a portion of the first connector 4 protrudes from the second surface 20 b along the second direction Z. The portion of the first connector 4 protruding from the second surface 20 b may be used to connect to the gas delivery device 100 .

[0110] Optionally, the first surface 20a and the second surface 20b are arranged one above the other.

[0111] In some embodiments, the first joint 4 is disposed at the bottom of the supporting mechanism 2. Of course, alternatively, the first joint 4 may also be disposed at other positions of the supporting mechanism 2, for example, the first joint 4 may be disposed at one side of the supporting mechanism 2 along the first direction X, or at one side of the supporting mechanism 2 along the third direction Y. Optionally, the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0112] When the first connector 4 is disposed at the bottom of the supporting mechanism 2 , the first connector 4 can be connected to the gas delivery device 100 by pressing up and down, thereby simplifying the process of charging and pressurizing the battery pressurizing device 1 .

[0113] Exemplarily, when the battery pressurizing device 1 enters the formation station and is locked, the battery pressurizing device 1 is driven by an external power device to descend, so that the first connector 4 is pressed downward to the gas delivery device 100 located below the battery pressurizing device 1, thereby realizing the connection between the first connector 4 and the gas delivery device 100. After the first connector 4 is connected to the gas delivery device 100, the gas delivery device 100 inputs gas into the gas channel 21 through the first connector 4 to realize pressurization during the formation process.

[0114] In some embodiments, the first connector 4 is disposed at the center of the second surface 20b.

[0115] In some embodiments, the first surface 20 a is used to support the battery cell 200 , so as to improve the stability of the battery cell 200 and reduce the risk of the battery cell 200 shifting during the process of pressurizing the battery cell 200 .

[0116] In some embodiments, the structure of the first connector 4 can be set as needed. For example, the portion of the first connector 4 protruding from the second surface 20b can be cylindrical, conical or other shapes, so as to facilitate insertion into the gas delivery connector of the gas delivery device 100 for matching with the first connector 4. For another example, the first connector 4 can also be provided with a groove structure, and the gas delivery connector can be inserted into the groove structure to match with the first connector 4. Of course, the first connector 4 can also adopt other structures as long as it can match with the gas delivery connector.

[0117] In some embodiments, the bearing mechanism 2 includes a first bearing plate 22, a second bearing plate 23, and a ventilation duct 24. The first bearing plate 22 includes a first surface 20a. The second bearing plate 23 and the first bearing plate 22 are spaced apart in the second direction Z, and the second bearing plate 23 is located on the side of the first bearing plate 22 away from the pressurizing mechanism 3. The second bearing plate 23 includes a second surface 20b, and the first joint 4 is provided on the second bearing plate 23. The ventilation duct 24 is provided between the first bearing plate 22 and the second bearing plate 23 and connected to the first joint 4, and a gas passage 21 is provided inside the ventilation duct 24.

[0118] The first carrier plate 22 separates the ventilation duct 24 from the pressurizing mechanism 3 to reduce the risk of interference between the ventilation duct 24 and the battery cell 200. The ventilation duct 24 is centrally arranged between the first carrier plate 22 and the second carrier plate 23, which can improve the integration of the battery pressurizing device 1. The first carrier plate 22 and the second carrier plate 23 can protect the ventilation duct 24 from both sides to reduce the risk of the ventilation duct 24 being subjected to external impact and improve the service life and sealing of the ventilation duct 24.

[0119] In some embodiments, the first supporting plate 22 is a flat plate structure.

[0120] In some embodiments, the second supporting plate 23 is a flat plate structure.

[0121] In some embodiments, the supporting mechanism 2 further includes a supporting plate 25 , which is located between the first supporting plate 22 and the second supporting plate 23 and connects the first supporting plate 22 and the second supporting plate 23 .

[0122] In some embodiments, the first connector 4 passes through the second supporting plate 23 .

[0123] In some embodiments, the gas channel 21 connects the accommodating cavities 31 of the multiple pressurizing mechanisms 3 in parallel to improve the consistency of the internal pressures of the accommodating cavities 31 of the multiple pressurizing mechanisms 3 and improve the uniformity of the pressure applied by the multiple pressurizing mechanisms 3 to the battery cells 200 .

[0124] In some embodiments, the gas channel 21 includes a converging channel 211 and a plurality of branching channels 212, and the plurality of branching channels 212 are connected to the converging channel 211 in parallel. The converging channel 211 is connected to the first joint 4, and the accommodating chamber 31 of each pressurizing mechanism 3 is connected to the converging channel 211 through at least one branching channel 212.

[0125] The accommodating chamber 31 of each pressurizing mechanism 3 may be connected to the converging channel 211 through one branching channel 212 , or may be connected to the converging channel 211 through a plurality of parallel branching channels 212 .

[0126] The gas input by the gas transmission device 100 enters the converging channel 211 through the first joint 4 and then enters the accommodating chambers 31 of the multiple pressurizing mechanisms 3 through the multiple branching channels 212 to increase the internal gas pressure of the accommodating chambers 31 of the multiple pressurizing mechanisms 3 .

[0127] In some embodiments, the accommodating chamber 31 of each pressurizing mechanism 3 is connected to the converging channel 211 through at least two branching channels 212 .

[0128] The present application can increase the passage for gas to enter the accommodating chamber 31, thereby increasing the gas transmission rate and improving the efficiency of the expansion and deformation of the pressurizing mechanism 3, thereby saving work hours.

[0129] In some embodiments, the accommodating chamber 31 of each pressurizing mechanism 3 is connected to the converging channel 211 through two branching channels 212 .

[0130] In some embodiments, the ventilation duct 24 includes a confluence pipe 241 and a plurality of diversion pipes 242, the plurality of diversion pipes 242 are connected to the confluence pipe 241, and the first connector 4 is connected to the confluence pipe 241. The confluence channel 211 is formed inside the confluence pipe 241, and the diversion channels 212 are formed inside each diversion pipe 242.

[0131] In some embodiments, the battery pressurizing device 1 further includes a plurality of second connectors 5 disposed on the supporting mechanism 2 , and the accommodating cavity 31 of each pressurizing mechanism 3 is connected to the gas channel 21 via at least one second connector 5 .

[0132] The second connector 5 can play a role of transition, so as to facilitate the communication between the accommodating chamber 31 and the gas channel 21 .

[0133] In some embodiments, the number of the second connectors 5 is the same as the number of the diversion channels 212, and the plurality of second connectors 5 is arranged in one-to-one correspondence with the plurality of diversion channels 212. In other words, each diversion channel 212 is connected to the accommodating cavity 31 through a corresponding second connector 5.

[0134] In some embodiments, the accommodating chamber 31 of each pressurizing mechanism 3 is connected to two second connectors 5 , and each second connector 5 is connected to a diversion channel 212 .

[0135] In some embodiments, the second connector 5 is mounted on the first supporting plate 22 .

[0136] In some embodiments, the pressurizing mechanism 3 is provided with a vent 32 , and the vent 32 is used to connect the gas channel 21 and the accommodating chamber 31 .

[0137] The vent 32 is provided to facilitate communication between the gas channel 21 and the accommodating chamber 31 .

[0138] The number of the vent 32 may be one or more.

[0139] In some embodiments, there are multiple vents 32. Multiple vents 32 can increase the gas transmission efficiency and reduce the pressure difference between different areas of the accommodating chamber 31, so that the deformation of the pressurizing mechanism 3 is more uniform and the consistency of the pressurization is improved.

[0140] In some embodiments, there are two vents 32 .

[0141] In some embodiments, the supporting mechanism 2 includes a first supporting plate 22 for supporting the battery cells 200 , and the plurality of pressurizing mechanisms 3 are located on the same side of the first supporting plate 22 along the second direction Z.

[0142] Optionally, in the second direction Z, the vent 32 is disposed on the side of the pressurizing mechanism 3 facing the first carrier plate 22. Providing the vent 32 on the side of the pressurizing mechanism 3 facing the first carrier plate 22 can reduce the distance between the vent 32 and the gas channel 21, which helps to simplify the structure for connecting the vent 32 and the gas channel 21.

[0143] In other embodiments, the vent 32 is disposed on one side of the pressurizing mechanism 3 along the third direction Y, and the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0144] As an example, there are multiple vents 32, a portion of which are located on one side of the pressurizing mechanism 3 along the third direction Y, and the remaining portion of which are located on the other side of the pressurizing mechanism 3 along the third direction Y. Of course, alternatively, the multiple vents 32 may also be located on the same side of the pressurizing mechanism 3 along the third direction Y.

[0145] The vent 32 is arranged on one side of the pressurizing mechanism 3 along the third direction Y, and the structure connecting the vent 32 and the gas channel 21 can be arranged on the outside of the pressurizing mechanism 3 along the third direction Y, so that the structure (for example, the second connector 5) can share space with the pressurizing mechanism 3 in the second direction Z, thereby reducing the maximum size of the battery pressurizing device 1 in the second direction Z.

[0146] In some other embodiments, there are multiple vents 32. Some of the vents 32 are disposed on the side of the pressurizing mechanism 3 facing the first carrier plate 22, and the remaining vents 32 are located on one or both sides of the pressurizing mechanism 3 along the third direction Y.

[0147] In some embodiments, at least a portion of the second connector 5 is inserted into the vent 32 to communicate with the accommodating cavity 31 .

[0148] In some embodiments, the number of the second connectors 5 is the same as the total number of the vents 32 of the plurality of pressurizing mechanisms 3 , and the second connectors 5 and the vents 32 are arranged in a one-to-one correspondence.

[0149] In some embodiments, the pressurizing mechanism 3 includes a substrate 33 and a cover plate 34 . The end surface 331 of the substrate 33 along the first direction X has an opening. The cover plate 34 covers the opening and encloses the substrate 33 to form a receiving cavity 31 .

[0150] As an example, the substrate 33 has two end surfaces 331 arranged opposite to each other along the first direction X. In some examples, one end surface 331 of the substrate 33 has an opening, and the pressurizing mechanism 3 includes a cover plate 34. In other examples, both end surfaces 331 of the substrate 33 have openings, and the pressurizing mechanism 3 includes two cover plates 34, and the two cover plates 34 cover the openings on the two end surfaces 331 respectively.

[0151] The materials of the substrate 33 and the cover plate 34 may be the same or different.

[0152] In some examples, the cover plate 34 may be embedded in the opening and connected to the base plate 33. In other examples, the area of ​​the cover plate 34 may be larger than the area of ​​the opening, and the cover plate 34 may be attached to the end surface 331.

[0153] In some embodiments, the cover plate 34 can be deformed under the internal air pressure of the accommodating chamber 31 and apply pressure to the battery cell 200 .

[0154] The embodiment of the present application provides the cover plate 34, which can help achieve directional deformation of the pressurizing mechanism 3, so that the cover plate 34 can effectively pressurize the battery cell 200. When the cover plate 34 is worn, the cover plate 34 can be replaced, thereby reducing the maintenance cost of the battery pressurizing device 1.

[0155] In some embodiments, the vent 32 is disposed on the substrate 33 .

[0156] In some embodiments, the elastic modulus of the substrate 33 is greater than the elastic modulus of the cover plate 34 .

[0157] The cover plate 34 has good elasticity, and when the internal pressure in the accommodating chamber 31 increases, the cover plate 34 can be deformed quickly to transmit the pressure to the battery cell 200. The base plate 33 has great strength and is not easily deformed, which can help to achieve directional deformation of the pressurizing mechanism 3 and increase the rate of increase of the internal pressure in the accommodating chamber 31.

[0158] In some embodiments, the material of the substrate 33 includes at least one of metal and plastic.

[0159] Optionally, the material of the substrate 33 includes metal, including but not limited to aluminum, aluminum alloy, stainless steel, nickel-plated steel, etc.

[0160] Optionally, the material of the substrate 33 may include any type of high temperature resistant and non-deformable engineering plastics, such as polyimide, polyphenylene ether resin, and polyetheretherketone.

[0161] Optionally, the material of the substrate 33 may include general plastics with good mechanical strength, such as polypropylene or polyethylene.

[0162] Metals and plastics are easy to process and obtain, which helps to reduce costs.

[0163] In some embodiments, the cover plate 34 is made of an elastic material. The elastic material is easy to expand and deform, and the deformation can be restored. The cover plate 34 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 1.

[0164] 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.

[0165] These structural materials are easy to purchase, easy to process, and relatively low in price, which can save costs. They also have stable structures and can be used in multiple processes.

[0166] In some embodiments, the substrate 33 is provided with a vent 32 for connecting the gas channel 21 and the accommodating chamber 31. The substrate 33 has high strength, and when the internal pressure of the accommodating chamber 31 increases, the vent 32 is less deformed, which can reduce the risk of sealing failure of the vent 32.

[0167] For example, the second connector 5 can be inserted into the vent 32 and seal the vent 32. The vent 32 in the embodiment of the present application has a small deformation, which can reduce the risk of sealing failure of the vent 32.

[0168] In some embodiments, the cover plate 34 is bonded to the substrate 33. In some examples, the cover plate 34 is bonded to the substrate 33 by an adhesive. In other examples, the cover plate 34 is bonded to the substrate 33 by a lamination process or a vulcanization process.

[0169] The bonding process is easy to implement and helps to seal the opening, reducing the risk of air leakage.

[0170] In some embodiments, the cover plate 34 is attached to the end surface 331 of the base plate 33 .

[0171] Attachment may refer to sticking and connecting. Optionally, the cover plate 34 is bonded to the end surface 331 .

[0172] In the embodiment of the present application, the cover plate 34 may have a larger area. Attaching the cover plate 34 to the end surface 331 can increase the connection area between the cover plate 34 and the substrate 33, improve the connection strength between the cover plate 34 and the substrate 33, reduce the risk of separation of the cover plate 34 and the substrate 33 under the action of internal pressure, and extend the service life of the battery pressurizing device 1.

[0173] In some embodiments, two end surfaces 331 of the substrate 33 along the first direction X are both provided with openings, and the pressurizing mechanism 3 includes two cover plates 34 , and the two cover plates 34 cover the two openings of the substrate 33 respectively.

[0174] The pressurizing mechanism 3 can pressurize the battery cells 200 on both sides at the same time, thereby reducing the total number of pressurizing mechanisms 3 and simplifying the structure of the battery pressurizing device 1 .

[0175] Optionally, the substrate 33 includes a through hole, which penetrates the substrate 33 along the first direction X to form openings on both end surfaces 331 . The two cover plates 34 seal the through holes to form the accommodating cavity 31 .

[0176] Alternatively, the substrate 33 is provided with recesses on both sides along the first direction X, and the two recesses are arranged along the first direction X. Each recess forms an opening on the corresponding end surface 331 . The two cover plates 34 cover the two recesses respectively to enclose and form two accommodating cavities 31 .

[0177] In some embodiments, the supporting mechanism 2 includes a first supporting plate 22 and two side plates 26. The first supporting plate 22 is used to support the battery cells 200, and the multiple pressurizing mechanisms 3 are located on the same side of the first supporting plate 22 along the second direction Z. In the second direction Z, the two side plates 26 are arranged on the side of the first supporting plate 22 facing the multiple pressurizing mechanisms 3. The two side plates 26 are arranged at intervals along the third direction Y, and the first direction X, the second direction Z and the third direction Y intersect each other. In the third direction Y, the multiple pressurizing mechanisms 3 are arranged between the two side plates 26 and connected to the two side plates 26.

[0178] The pressurizing mechanism 3 may be directly connected to the side plate 26 , or may be indirectly connected to the side plate 26 via other components.

[0179] The side plate 26 can protect the pressurizing mechanism 3 and the battery cell 200 from both sides of the third direction Y, reducing the risk of damage to the pressurizing mechanism 3 and the battery cell 200. The side plate 26 can also limit the pressurizing mechanism 3 to reduce the deviation of the pressurizing mechanism 3 during the pressurization process.

[0180] In some alternative embodiments, the gas channel 21 may also be disposed in the side plate 26. Optionally, the first joint 4 may be mounted on the side plate 26.

[0181] Figure 8 Schematic cross-sectional view of a pressurizing mechanism of a battery pressurizing device provided in some other embodiments of the present application.

[0182] like Figure 8 As shown, in some embodiments, the cover plate 34 is received in the opening, and the outer surface 341 of the cover plate 34 is flush with the end surface 331 .

[0183] The embodiment of the present application can reduce the space occupied by the pressurizing mechanism 3. In addition, when the battery cell 200 is inserted between the pressurizing mechanisms 3, the embodiment of the present application can reduce the risk of the battery cell 200 rubbing against the cover plate 34, reduce the wear of the cover plate 34, and increase the service life of the battery pressurizing device 1.

[0184] Fig. 9 for Figure 1 An enlarged schematic diagram at the circle frame; Fig.10 A schematic cross-sectional view of a side plate and a limiting component of a battery pressurizing device provided in some embodiments of the present application.

[0185] like Fig. 9 and Fig.10 As shown, in some embodiments, the battery pressurizing device 1 includes a plurality of limit assemblies 6 arranged at intervals along the first direction X, each limit assemblies 6 includes two limit components 61, and the two limit components 61 are opposite to each other along the third direction Y and are respectively arranged on the two side plates 26. Each limit component 61 is provided with a slot 611, and the two ends of the pressurizing mechanism 3 along the third direction Y are respectively inserted into the slots 611 of the two limit components 61 of the limit assembly 6.

[0186] The limiting component 61 may be fixed to the side plate 26. For example, in the first direction X, the position of the limiting component 61 relative to the side plate 26 may be fixed or adjustable.

[0187] The bottom of the slot 611 may be the limiting component 61 or the side plate 26 .

[0188] Optionally, the slot 611 passes through the limiting component 61 along the second direction Z, and the end of the pressing mechanism 3 can be inserted into the slot 611 along the second direction Z.

[0189] The pressurizing mechanism 3 inserted into the card slot 611 will be restricted by the limiting component 61 in the first direction X; when the pressurizing mechanism 3 applies pressure to the battery cell 200, the limiting component 61 can limit the movement of the pressurizing mechanism 3 along the first direction X, so as to reduce the risk of the pressurizing mechanism 3 being offset in the first direction X. The pressurizing mechanism 3 is fixed by plugging and matching with the limiting component 61, and the plugging method is easy to disassemble and assemble, which can simplify the assembly efficiency and reduce the difficulty of repairing and replacing the pressurizing mechanism 3.

[0190] In some embodiments, in the first direction X, the pressing mechanism 3 and the slot 611 are interference fit.

[0191] In some embodiments, the limiting component 61 is movably connected to the side plate 26 along the first direction X.

[0192] In the embodiment of the present application, the limiting component 61 can be moved along the first direction X as needed, so as to change the spacing between the pressurizing mechanisms 3 , so that the battery pressurizing device 1 can adapt to battery cells 200 of different thicknesses.

[0193] In some embodiments, when the specifications of the battery cell 200 are changed, such as when the thickness becomes larger or smaller, the fixation between the limiting component 61 and the side plate 26 can be released first (for example, by removing the screws), and then the limiting component 61 is moved. When the limiting component 61 moves to the set position, the limiting component 61 is fixed to the side plate 26.

[0194] In some embodiments, the second connector 5 comprises a hose. When the pressurizing mechanism 3 moves, the hose can adapt to the movement of the pressurizing mechanism 3 by deformation.

[0195] In some embodiments, a guide groove 261 is provided on one side of the side plate 26 facing the pressure mechanism 3. A portion of the limiting component 61 is accommodated in the guide groove 261 and can slide in the guide groove 261 along the first direction X. When the limiting component 61 moves to a predetermined position, a locking mechanism on the side plate 26, such as a bolt, can lock the limiting component 61 to the side plate 26.

[0196] In some embodiments, the limiting component 61 includes two protrusions 612 arranged along the first direction X, and a slot 611 is formed between the two protrusions 612 .

[0197] Exemplarily, in the third direction Y, at least a portion of each protrusion 612 protrudes from the surface of the side plate 26 facing the pressure mechanism 3. In the third direction Y, the heights of the two protrusions 612 protruding from the side plate 26 may be the same or different.

[0198] In some embodiments, the limiting component 61 further includes a limiting body 613. Two protrusions 612 extend from a surface of the limiting component 61 facing the pressurizing mechanism 3 along the third direction Y. The limiting body 613 closes the card slot 611 on one side in the third direction Y.

[0199] In some embodiments, the limiting body 613 is accommodated in the guide groove 261 and is used to be fixed to the side plate 26 .

[0200] In some embodiments, the protrusion 612 disposed on one side plate 26 and located at the outermost end in the first direction X is integrally connected with the protrusion 612 disposed on the other side plate 26 and located at the outermost end in the first direction X.

[0201] On one side plate 26 , the protrusions 612 of the limiting components 61 of the plurality of limiting assemblies 6 are arranged along the first direction X, wherein among all the protrusions 612 on the one side plate 26 , the protrusions 612 at both ends are respectively defined as the first protrusion and the second protrusion.

[0202] On the other side plate 26 , the protrusions 612 of the limiting components 61 of the plurality of limiting assemblies 6 are arranged along the first direction X, wherein among all the protrusions 612 on the other side plate 26 , the protrusions 612 at both ends are respectively defined as the third protrusion and the fourth protrusion.

[0203] The first protrusion and the third protrusion are located at the same end in the first direction X and are connected as a whole, and the second protrusion and the fourth protrusion are located at the same end in the first direction X and are connected as a whole.

[0204] In the first direction X, the outer side of the outermost pressurizing mechanism 3 is not provided with a battery cell 200, and the deformation of the outermost pressurizing mechanism 3 is invalid deformation. In the embodiment of the present application, the protrusions 612 at the outermost ends of the two side plates 26 are connected as a whole to form a limit plate, which can limit the expansion deformation of the outermost pressurizing mechanism 3, making it easier for the pressurizing mechanism 3 to deform toward the battery cell 200, thereby improving the deformation efficiency of the pressurizing mechanism 3.

[0205] In other words, the battery pressurizing device 1 includes two limit plates 62 arranged along the first direction X, and the plurality of pressurizing mechanisms 3 are arranged between the two limit plates 62 in the first direction X. Each limit plate 62 is connected to two side plates 26 .

[0206] In some embodiments, the substrate 33 is inserted into the slot 611. The substrate 33 has a high elastic modulus and deforms less under the internal pressure of the accommodating cavity 31, thereby reducing the pressure exerted by the substrate 33 on the limiting component 61, reducing the deformation of the limiting component 61, and improving the stability of the cooperation between the substrate 33 and the slot 611.

[0207] Fig.11 It is a schematic diagram of the structure of a battery pressurizing device according to some other embodiments of the present application; Fig.12 for Fig.11 A schematic cross-sectional view of the supporting mechanism shown; Fig.13 for Fig.11 A bottom view of the first supporting plate is shown.

[0208] like Figures 11 to 13 As shown, in some embodiments, the supporting mechanism 2 includes a first supporting plate 22 and a second supporting plate 23, and the first supporting plate 22 and the second supporting plate 23 are stacked and enclosed along the second direction Z to form a gas channel 21. The first supporting plate 22 includes a first surface 20a, and the second supporting plate 23 includes a second surface 20b. The second supporting plate 23 is located on a side of the first supporting plate 22 away from the pressurizing mechanism 3 in the second direction Z.

[0209] The first supporting plate 22 and the second supporting plate 23 may be fixedly connected by welding, fastener connection, clamping, bonding or other connection methods.

[0210] The embodiment of the present application utilizes the first supporting plate 22 and the second supporting plate 23 to enclose and form the gas channel 21, which can save pipelines, reduce the volume and weight of the battery pressurizing device 1, simplify the structure of the battery pressurizing device 1, and reduce the cost of the battery pressurizing device 1.

[0211] In some embodiments, a sealing member may be disposed between the first supporting plate 22 and the second supporting plate 23 to improve the sealing performance of the gas channel 21 .

[0212] In some embodiments, a first recess 221 is disposed on a side of the first supporting plate 22 facing the second supporting plate 23 , and the second supporting plate 23 covers the first recess 221 to form a gas channel 21 between the first supporting plate 22 and the second supporting plate 23 .

[0213] In some embodiments, the second supporting plate 23 has a second recess 231 on one side facing the first supporting plate 22, the second recess 231 corresponds to the first recess 221, and together they form the gas channel 21. Of course, alternatively, the second supporting plate 23 may also be a flat plate structure without a second recess.

[0214] Fig.14 It is a schematic diagram of the structure of a battery pressurizing device according to some other embodiments of the present application; Fig.15 for Fig.14 A schematic cross-sectional view of the first carrying plate is shown.

[0215] like Fig.14 and Fig.15 As shown, in some embodiments, the supporting mechanism 2 includes a first supporting plate 22 , the first supporting plate 22 includes a first surface 20 a and a second surface 20 b , and a gas channel 21 is formed inside the first supporting plate 22 .

[0216] The embodiment of the present application directly forms the gas channel 21 inside the first supporting plate 22 , which can save pipelines, reduce the volume and weight of the battery pressurizing device 1 , simplify the structure of the battery pressurizing device 1 , and reduce the cost of the battery pressurizing device 1 .

[0217] In some embodiments, the first connector 4 is mounted on the first supporting plate 22 .

[0218] Fig.16 A schematic diagram of the structure of a battery production system provided for some embodiments of the present application.

[0219] like Fig.16 As shown, the embodiment of the present application further provides a battery production system, which includes the battery pressurizing device 1 provided in any of the above embodiments and a gas delivery device 100. The gas delivery device 100 is connected to the first connector 4 and can deliver or extract gas.

[0220] In some embodiments, the gas delivery device 100 includes a gas delivery pipeline.

[0221] In some embodiments, the battery pressurizing device 1 is disposed above the gas pipeline, and the first connector 4 is pressed onto the gas pipeline from above.

[0222] In some embodiments, the battery production system further includes a processing device 300 for performing specific processing on the battery cells 200 .

[0223] For example, in some examples, the processing device 300 may be a negative pressure device, which is used to extract the gas inside the battery cell 200 during the formation process of the battery cell 200.

[0224] In other examples, the processing device 300 may be a liquid injection device, which can be used to inject electrolyte into the interior of the battery cell 200 .

[0225] Reference Figures 1 to 7 An embodiment of the present application provides a battery pressurizing device 1, which includes a supporting mechanism 2, a plurality of pressurizing mechanisms 3, a first connector 4, and a plurality of second connectors 5.

[0226] The bearing mechanism 2 includes a first bearing plate 22, a second bearing plate 23, two side plates 26 and a ventilation duct 24. The first bearing plate 22 is used to bear the battery cells 200, and the plurality of pressurizing mechanisms 3 are located on the same side of the first bearing plate 22 along the second direction Z and are arranged along the first direction X. The second bearing plate 23 and the first bearing plate 22 are spaced apart in the second direction Z, and the second bearing plate 23 is located on the side of the first bearing plate 22 away from the pressurizing mechanism 3.

[0227] In the second direction Z, two side plates 26 are arranged on the side of the first carrier plate 22 facing the plurality of pressurizing mechanisms 3. The two side plates 26 are arranged at intervals along the third direction Y, and the first direction X, the second direction Z, and the third direction Y intersect each other. In the third direction Y, the plurality of pressurizing mechanisms 3 are arranged between the two side plates 26 and connected to the two side plates 26.

[0228] The first joint 4 is disposed on the second supporting plate 23. The ventilation pipe 24 is disposed between the first supporting plate 22 and the second supporting plate 23 and connected to the first joint 4. The ventilation pipe 24 has a gas passage 21 disposed therein.

[0229] The pressurizing mechanism 3 includes a base plate 33 and a cover plate 34 . The base plate 33 has an opening on its end surface 331 along the first direction X. The cover plate 34 covers the opening and forms a receiving cavity 31 together with the base plate 33 . The elastic modulus of the base plate 33 is greater than that of the cover plate 34 .

[0230] A plurality of second connectors 5 are mounted on the first carrier plate 22 . Each base plate 33 is connected to two second connectors 5 , so that the accommodating cavity 31 is connected to the gas channel 21 through the two second connectors 5 .

[0231] The first connector 4 is used to connect to the external gas transmission device 100 . The cover plate 34 can expand and deform under the action of the internal gas pressure of the accommodating chamber 31 , and pressurize the battery cells 200 disposed between the pressurizing mechanisms 3 .

[0232] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery pressurizing device, characterized in that: include: A bearing mechanism provided with a gas passage; A plurality of pressurizing mechanisms are provided on the bearing mechanism and arranged along the first direction, the pressurizing mechanisms are provided with accommodating cavities, and the accommodating cavities of the plurality of pressurizing mechanisms are connected to the gas channel; A first connector, disposed on the bearing mechanism and in communication with the gas channel, the first connector being used to connect to an external gas transmission device; The pressurizing mechanism can expand and deform under the action of the internal air pressure of the accommodating cavity, and apply pressure to the battery cells arranged between the pressurizing mechanisms.

2. The battery pressurizing device according to claim 1, characterized in that: The bearing mechanism comprises a first surface and a second surface arranged opposite to each other along a second direction, wherein the first direction is perpendicular to the second direction; The plurality of pressurizing mechanisms are arranged on a side of the first surface facing away from the second surface; in the second direction, the gas channel is located between the first surface and the second surface.

3. The battery pressurizing device according to claim 2, characterized in that: At least a portion of the first joint protrudes from the second surface along the second direction.

4. The battery pressurizing device according to claim 2 or 3, characterized in that: The carrying mechanism comprises: A first carrying plate, comprising the first surface; a second bearing plate, the second bearing plate and the first bearing plate being spaced apart in the second direction, the second bearing plate being located on a side of the first bearing plate away from the pressurizing mechanism, the second bearing plate comprising the second surface, and the first joint being disposed on the second bearing plate; and A ventilation duct is arranged between the first supporting plate and the second supporting plate and connected to the first joint, and the gas channel is arranged inside the ventilation duct.

5. The battery pressurizing device according to claim 2 or 3, characterized in that: The bearing mechanism includes a first bearing plate, the first bearing plate includes the first surface and the second surface, and the gas channel is formed inside the first bearing plate.

6. The battery pressurizing device according to claim 2 or 3, characterized in that: The bearing mechanism comprises a first bearing plate and a second bearing plate, wherein the first bearing plate and the second bearing plate are stacked and enclosed along the second direction to form the gas channel. The first carrying plate includes the first surface, the second carrying plate includes the second surface, and the second carrying plate is located on a side of the first carrying plate away from the pressing mechanism in the second direction.

7. The battery pressurizing device according to any one of claims 1 to 6, characterized in that: The gas channel connects the accommodation chambers of the plurality of pressurizing mechanisms in parallel.

8. The battery pressurizing device according to claim 7, characterized in that: The gas channel includes a converging channel and a plurality of branching channels, and the plurality of branching channels are connected to the converging channel in parallel; The converging channel is connected to the first joint, and the accommodating chamber of each of the pressurizing mechanisms is connected to the converging channel through at least one of the diverting channels.

9. The battery pressurizing device according to claim 8, characterized in that: The accommodating chamber of each of the pressurizing mechanisms is connected to the converging channel through at least two of the branching channels.

10. The battery pressurizing device according to any one of claims 1 to 9, characterized in that: The battery pressurizing device further comprises a plurality of second connectors arranged on the supporting mechanism, and the accommodating cavity of each pressurizing mechanism is connected to the gas channel via at least one of the second connectors.

11. The battery pressurizing device according to any one of claims 1 to 10, characterized in that: The carrying mechanism comprises a first carrying plate for carrying the battery cell, and the plurality of pressurizing mechanisms are located on the same side of the first carrying plate along the second direction; The pressurizing mechanism is provided with a vent, and the vent is used to connect the gas channel and the accommodating chamber; In the second direction, the vent is arranged on the side of the pressurizing mechanism facing the first supporting plate; and / or, the vent is arranged on the side of the pressurizing mechanism along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

12. The battery pressurizing device according to any one of claims 1 to 11, characterized in that: The pressurizing mechanism comprises a base plate and a cover plate, the end surface of the base plate along the first direction has an opening, the cover plate covers the opening and encloses the base plate to form the accommodating cavity; The elastic modulus of the substrate is greater than the elastic modulus of the cover plate.

13. The battery pressurizing device according to claim 12, 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.

14. The battery pressurizing device according to claim 12 or 13, characterized in that: The substrate is provided with a vent for connecting the gas channel and the accommodating cavity.

15. The battery pressurizing device according to any one of claims 12 to 14, characterized in that: The two end surfaces of the substrate along the first direction are both provided with openings, and the pressurizing mechanism comprises two cover plates, and the two cover plates respectively cover the two openings of the substrate.

16. The battery pressurizing device according to any one of claims 1 to 15, characterized in that: The bearing mechanism comprises a first bearing plate and two side plates; the first bearing plate is used to bear the battery monomer, and the plurality of pressurizing mechanisms are located on the same side of the first bearing plate along the second direction; In the second direction, the two side plates are arranged on a side of the first bearing plate facing the plurality of pressurizing mechanisms; the two side plates are arranged at intervals along the third direction, and the first direction, the second direction and the third direction intersect each other; In the third direction, the plurality of pressurizing mechanisms are disposed between the two side plates and connected to the two side plates.

17. The battery pressurizing device according to claim 16, characterized in that: The battery pressurizing device has a plurality of limit assemblies arranged at intervals along the first direction, each limit assembly comprising two limit components, the two limit components are opposite to each other along the third direction and are respectively arranged on the two side plates; Each of the limiting components is provided with a slot, and the two ends of the pressurizing mechanism along the third direction are respectively inserted into the slots of the two limiting components of the limiting assembly.

18. The battery pressurizing device according to claim 17, characterized in that: The limiting component is movably connected to the side plate along the first direction.

19. The battery pressurizing device according to claim 17 or 18, characterized in that: The limiting component includes two protrusions arranged along the first direction, and the clamping groove is formed between the two protrusions; The protrusion provided on one of the side plates and located at the outermost end in the first direction is integrally connected with the protrusion provided on the other side plate and located at the outermost end in the first direction.

20. The battery pressurizing device according to any one of claims 17 to 19, characterized in that: The pressurizing mechanism comprises a base plate and a cover plate, the end surface of the base plate along the first direction has an opening, the cover plate covers the opening and encloses the base plate to form the accommodating cavity; The elastic modulus of the substrate is greater than the elastic modulus of the cover plate; The substrate is inserted into the card slot.

21. A battery production system, characterized in that: include: The battery pressurizing device according to any one of claims 1 to 20; as well as The gas delivery equipment is used to connect to the first joint and can deliver or extract gas.

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