Battery cell manufacturing device, battery cell, battery device, and electric device

Abstract

The utility model relates to the technical field of battery production, in particular to a manufacturing device of a battery monomer, the battery monomer, a battery device and electric equipment. The battery cell comprises a shell, the manufacturing device of the battery cell comprises liquid injection equipment and a filling piece, and the liquid injection equipment is used for filling a gap between the outer surface of the filling piece and the inner surface of the shell with slurry so as to form an insulating layer on the inner surface of the shell. According to the manufacturing device of the battery monomer, the liquid injection equipment and the filling part are arranged, and the liquid injection equipment is used for filling the gap between the outer surface of the filling part and the inner surface of the shell with the slurry so as to form the insulating layer on the inner surface of the shell, so that the insulating layer made of the slurry can be formed on the inner surface of the shell; therefore, the shell and the electrode assembly can be insulated and isolated, and the shell and the electrode assembly are effectively insulated.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to an apparatus for manufacturing a battery cell, a battery cell, a battery device, and an electrical device. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] With the increasing maturity of new energy technologies, new energy vehicles and other electrical equipment are gradually entering the public eye. The core technology of new energy vehicles lies in the battery device, and the safety and stability of the battery device directly determine the performance of the entire vehicle.

[0004] The battery device includes a battery cell, which includes a housing and an electrode assembly. An insulating layer is provided between the housing and the electrode assembly. The insulating layer is usually made of Mylar film. However, Mylar film is prone to damage during installation and cannot effectively insulate the housing and the electrode assembly. Utility Model Content

[0005] In view of the above problems, the embodiments of this application provide a battery cell manufacturing apparatus, a battery cell, a battery device, and an electrical device, which solves the problem in the prior art that the insulation layer is easily damaged, resulting in the inability to effectively insulate the casing and electrode assembly.

[0006] A first aspect of the embodiments of this application provides a battery cell manufacturing apparatus. The battery cell includes a housing. The manufacturing apparatus includes a liquid injection device and a filler. The liquid injection device is used to fill a slurry into the gap between the outer surface of the filler and the inner surface of the housing to form an insulating layer on the inner surface of the housing.

[0007] The battery cell manufacturing apparatus of the present application, by providing a liquid injection device and a filler, wherein the liquid injection device is used to fill the gap between the outer surface of the filler and the inner surface of the shell with slurry to form an insulating layer on the inner surface of the shell, thereby forming an insulating layer made of slurry on the inner surface of the shell, thereby achieving insulation isolation between the shell and the electrode assembly, effectively insulating the shell and the electrode assembly.

[0008] The battery cell manufacturing apparatus according to the embodiments of this application also has the following technical features:

[0009] In some embodiments of this application, the injection device includes a pusher, a slurry chamber, and a liquid outlet. The liquid outlet is in communication with the slurry chamber, and at least part of the pusher is movably disposed in the slurry chamber to squeeze the slurry in the slurry chamber out of the liquid outlet.

[0010] The embodiments of this application include a liquid injection device comprising a pusher, a slurry chamber, and a liquid outlet. The liquid outlet is connected to the slurry chamber, and at least part of the pusher is movably disposed within the slurry chamber to squeeze the slurry in the slurry chamber out of the liquid outlet. Thus, the movement of the pusher can squeeze the slurry in the slurry chamber out of the liquid outlet, thereby facilitating the filling of the gaps with the squeezed slurry.

[0011] In some embodiments of this application, at least a portion of the filler is used within the accommodating cavity of the battery cell housing.

[0012] The embodiments of this application, by providing a filler and placing at least a portion of the filler within the accommodating cavity of the battery cell's casing, can create a gap between the filler and the casing. After the slurry is filled into the gap, an insulating layer can be formed, thereby isolating the casing and the electrode assembly through the insulating layer.

[0013] In some embodiments of this application, the filler includes a guide portion and a filling portion connected sequentially along a first direction, wherein at least a portion of the filling portion is disposed within the receiving cavity, and the guide portion is disposed closer to the injection device than the filling portion, so as to guide the slurry extruded by the injection device into the gap formed by the housing and the filler, wherein the first direction is the height direction of the housing.

[0014] The embodiments of this application provide a guide portion and a filling portion that are sequentially connected along a first direction. At least part of the filling portion is located in the accommodating cavity, and the guide portion is located closer to the liquid injection device than the filling portion. This guides the slurry extruded from the liquid injection device into the gap formed by the housing and the filling member, so that the slurry extruded from the outlet can flow along the guide portion and into the gap between the filling member and the housing.

[0015] In some embodiments of this application, the shape of the filling portion is consistent with the shape of the shell.

[0016] By matching the shape of the filling portion with the shape of the housing in the embodiments of this application, the gap between the filling portion and the housing can be easily controlled, so that the thickness of the insulating layer is substantially consistent at different locations.

[0017] In some embodiments of this application, the filling part is a rectangular structure adapted to the internal shape of the shell; the guide part is a frustum structure, and the frustum structure includes a large end and a small end, the large end is connected to the filling part, and the small end is disposed facing the liquid outlet.

[0018] The embodiments of this application, by setting the filling part as a rectangular structure adapted to the internal shape of the shell, and the guide part as a frustum structure, with the small end of the frustum structure facing the liquid outlet, can facilitate the slurry squeezed out of the liquid outlet to flow to the small end, and then flow along the side of the guide part into the gap between the filling part and the shell, thereby filling the gap.

[0019] In some embodiments of this application, the outlet has a projection on the small end, the projection is within the range of the small end, and the outlet is positioned towards the center of the small end.

[0020] The embodiments of this application, by having the outlet projected onto the small end, wherein the projection is within the range of the small end and the outlet is positioned toward the center of the small end, can ensure that all the liquid flowing out of the outlet passes through the small end and flows along the side of the guide portion, so that the slurry flows evenly along the side of the guide portion.

[0021] In some embodiments of this application, the filler further includes a support portion connected to either the guide portion or the filler portion, and the support portion abuts against the end of the housing facing the injection device.

[0022] The embodiments of this application provide a support portion, which is connected to one of the guide portion and the filling portion. The support portion abuts against the end of the housing facing the liquid injection device. This allows the support portion to support the guide portion and the filling portion, creating a gap between the bottom of the filling portion and the housing. This ensures that the entire inner surface of the housing is covered with an insulating layer, achieving insulation isolation between the housing and the electrode assembly.

[0023] In some embodiments of this application, the portion of the filling part near the guide part is connected to the support part.

[0024] In the embodiments of this application, by connecting the portion of the filling part near the guide part to the support part, the support part can be connected to the portion of the filling part near the injection device, thereby reducing the volume of the filling part and thus reducing the cost of the filling part.

[0025] In some embodiments of this application, there are multiple support portions, and the multiple support portions are arranged at circumferential intervals along the filling portion.

[0026] The embodiments of this application, by setting the number of support parts to multiple and arranging the multiple support parts at intervals along the circumference of the filling part, can achieve stable placement of the filling part in the accommodating cavity through multiple support parts, reduce the probability of the filling part tilting, and reduce the probability of the filling part contacting the bottom of the housing.

[0027] In some embodiments of this application, the filler is a one-piece structure, and / or the filler has a non-wetting surface.

[0028] The embodiments of this application, by setting the filler as an integral structure, facilitate the processing of the filler and reduce the processing steps of the manufacturing apparatus. Furthermore, by having a non-wetting surface for the filler, the embodiments of this application prevent the slurry from adhering to the surface of the filler block, and ensure that the surface of the insulating layer remains flat when the filler block is removed, allowing the electrode assembly to smoothly enter the receiving cavity.

[0029] A second aspect of the embodiments of this application provides a battery cell manufactured using the battery cell manufacturing apparatus mentioned in the above embodiments.

[0030] A third aspect of the embodiments of this application provides a battery device, including a battery housing and battery cells as mentioned in the above embodiments, wherein the battery cells are disposed within the battery housing.

[0031] A fourth aspect of the embodiments of this application provides an electrical device including the battery device mentioned in the above embodiments, the battery device being used to store or provide electrical energy.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This application provides a schematic diagram of the structure of an electrical device according to some embodiments;

[0035] Figure 2 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of a battery cell provided in some embodiments of this application;

[0037] Figure 4 A flowchart illustrating a method for manufacturing a single battery cell, provided for some embodiments of this application;

[0038] Figure 5 A schematic diagram of the structure of a liquid injection device for a manufacturing apparatus provided in some embodiments of this application;

[0039] Figure 6 A schematic diagram of the structure of a filling element for a manufacturing apparatus provided in some embodiments of this application;

[0040] Figure 7 This is a schematic diagram of the structure of a manufacturing apparatus in operation, provided in some embodiments of this application.

[0041] The attached figures are labeled as follows:

[0042] 100. Battery device; 200. Electrical equipment; 300. Controller; 400. Motor;

[0043] 10. Battery cell; 11. Electrode assembly; 12. Housing; 121. Receiving cavity; 122. Opening; 13. End cap; 14. Insulating layer;

[0044] 20. Battery housing; 21. First housing; 22. Second housing; 23. Storage space;

[0045] 500. Injection device; 501. Pusher head; 502. Slurry chamber; 5021. First chamber; 5022. Second chamber; 503. Outlet; 504. First valve; 505. Second valve;

[0046] 600. Filler; 601. Guide; 6011. Small end; 6012. Large end; 602. Filler; 603. Support;

[0047] 700. Slurry conveying pipeline;

[0048] XX, First Direction;

[0049] YY, second direction. Detailed Implementation

[0050] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0051] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0052] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0055] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0056] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0057] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0058] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0059] The battery devices described in this application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. Such electrical equipment can be composed of battery cells and battery devices as described in this application.

[0060] In this application embodiment, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0061] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all batteries including housings and electrical equipment using batteries.

[0062] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. Current collectors without the positive active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. Current collectors without the negative active material layer protrude beyond those with the coating. These uncoated current collectors are stacked together to form the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, etc. The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0063] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0064] The battery device includes a battery cell, which includes a housing and an electrode assembly. An insulating layer is provided between the housing and the electrode assembly. The insulating layer is usually made of Mylar film. However, Mylar film is prone to damage during installation and cannot effectively insulate the housing and the electrode assembly.

[0065] To address this problem, embodiments of this application propose a battery cell manufacturing apparatus. The apparatus includes a liquid injection device and a filler. The liquid injection device is used to fill the gap between the outer surface of the filler and the inner surface of the casing with slurry to form an insulating layer on the inner surface of the casing. This allows the slurry-based insulating layer to be formed on the inner surface of the casing, thereby achieving insulation between the casing and the electrode assembly, effectively insulating both the casing and the electrode assembly.

[0066] The battery cell manufacturing apparatus in the embodiments of this application can be used in the production process of battery cells, or in application scenarios such as setting an insulating layer inside a container.

[0067] The structures in the embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0068] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0069] Combined with appendix Figure 1 As shown, vehicle 200 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside vehicle 200, and the battery device 100 can be located at the bottom, front, or rear of vehicle 200. The battery device 100 can be used to power vehicle 200; for example, the battery device 100 can serve as the operating power source for vehicle 200. Vehicle 200 may also include a controller 300 and a motor 400. The controller 300 is used to control the battery device 100 to supply power to the motor 400, for example, to meet the power needs of vehicle 200 during starting, navigation, and driving.

[0070] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 200, but also as the driving power source for the vehicle 200, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 200.

[0071] Combined with appendix Figure 2As shown, an embodiment of this application provides a battery device 100, which can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. Both the battery cell 10 and the battery device 100 can be cylindrical, flat, cuboid, or other shapes.

[0072] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 10, which are connected in series, parallel, or mixed connections via busbars.

[0073] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 10; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 10 into a single module. As an example, a battery module can be formed by bundling multiple battery cells 10 together with cable ties.

[0074] In some embodiments, the battery device 100 may be a battery pack, which includes a battery housing 20 and one or more individual battery cells housed within the battery housing 20.

[0075] As an example, the battery cell assembly can be a battery module, which can be housed in the battery housing 20 by fixing the battery module in the battery housing 20.

[0076] As an example, the battery cell assembly can also be housed in the battery housing 20 by directly fixing multiple battery cells 10 to the battery housing 20.

[0077] The battery housing 20 provides a receiving space 23 for the battery cell 10, and the battery housing 20 can adopt various structures. In some embodiments, the battery housing 20 may include a first housing 21 and a second housing 22, which cover each other, and the first housing 21 and the second housing 22 together define a receiving space 23 for accommodating the battery cell 10.

[0078] As an example, the battery box 20 may be part of the chassis structure of the vehicle 200. For example, the battery box 20 may be at least part of the floor of the vehicle 200, or the frame of the battery box 20 may be at least part of the crossbeams and longitudinal beams of the vehicle 200.

[0079] Figure 3The present invention provides a schematic diagram of the structure of a battery cell 10 in some embodiments. The battery cell 10 also includes a housing 12 and an end cap 13. The housing 12 has an open structure at the top. The electrode assembly 11 is installed in the accommodating cavity 121. The end cap 13 covers the housing 12. An insulating layer 14 is provided between the housing 12 and the electrode assembly 11.

[0080] like Figure 4 As shown, embodiments of this application also provide a method for manufacturing a battery cell 10, comprising:

[0081] S41. A housing 12 with a receiving cavity 121 is provided, wherein one end of the housing 12 is provided with an opening 122 communicating with the receiving cavity 121;

[0082] S42, Provide filler 600;

[0083] S43. At least a portion of the filler 600 is inserted into the receiving cavity 121 through the opening 122, wherein a gap is formed between the outer surface of the filler 600 and the inner surface of the housing 12.

[0084] S44. Fill the gap with grout until the gap is full, wherein the grout has insulating properties;

[0085] S45. The slurry is cured to form a solid insulating layer 14 on the inner wall of the housing 12.

[0086] It should be noted that the filler 600 can be made of materials such as polytetrafluoroethylene (PTFE), making its surface non-wetting and preventing slurry adhesion. The slurry can be made of organic or inorganic insulating materials. Organic insulating materials include, but are not limited to, polyethylene, polypropylene, polyethylene terephthalate (PET), polyvinyl alcohol (PVA), epoxy resin, phenolic resin, polyaniline, alkyd resin, and polyimide; one, two, or more of these materials can be used. Inorganic insulating materials include, but are not limited to, silica, titanium dioxide, aluminum nitride, and boehmite; one, two, or more of these materials can be used. The slurry also includes a binder, which is formed by dissolving the insulating material and binder in a solvent in a certain proportion. For organic insulating material systems, the binder can be PTFE or polyvinylidene fluoride (PVDF), and the solvent can be N-methylpyrrolidone. For inorganic insulating material systems, the binder can be sodium carboxymethyl cellulose or PVDF, and the binder can be deionized water. Other materials can also be added to the slurry as needed. The viscosity of the slurry is usually between 100 and 200 mPa·s. It should not be too low, otherwise it will be difficult to dry and the solvent will be wasted. The viscosity of the slurry should not be too high either, otherwise it will be difficult to flow and take a long time, which will affect the manufacturing efficiency of the insulation layer 14.

[0087] The embodiments of this application provide a housing 12 with a receiving cavity 121 and a filler 600. At least a portion of the filler 600 is inserted into the receiving cavity 121 through the opening 122. A gap is formed between the outer surface of the filler 600 and the inner surface of the housing 12. The gap is filled with slurry until it is completely filled, and the slurry in the gap forms a solid insulating layer 14 on the inner wall of the housing 12. This allows an insulating layer 14 with the same size as the gap to be formed on the inner surface of the housing 12, reducing the probability of damage due to interference and better isolating the housing 12 and the electrode assembly 11.

[0088] In addition, the main components of the slurry here are insulating materials, binders and solvents. The specific ratio can be adjusted as needed. For example, the mass ratio of titanium dioxide is 70%, solvent is 20%, and binder is 10%.

[0089] Optionally, in S44, the housing 12 is rotated while filling the gap with slurry until the gap is full.

[0090] The rotation speed of the housing 12 can be set as needed. The rotation speed of the housing 12 can be from 5 seconds to 5 minutes for one revolution, such as 10 seconds, 50 seconds, 60 seconds or 200 seconds for one revolution, etc. That is to say, the rotation speed of the housing 12 is from 0.007π to 0.4π degrees / second, such as 0.01π, 0.08π, 0.2π, 0.3π or 0.4π degrees / second. This can make the slurry fill the gap evenly, and the flow of the slurry can be used to achieve complete filling of the gap, thereby making the slurry evenly distributed in the gap.

[0091] In the embodiments of this application, by controlling the housing 12 to be in a rotating state during the process of filling the gap with slurry until the gap is filled, it is possible to conveniently fill the gap with slurry, make it convenient to uniformly fill the gap with slurry, and improve the efficiency of filling the gap with slurry.

[0092] Specifically, the housing 12 is placed on a support device (not shown) and the housing 12 is fixed on the support device, wherein the support device may be a turntable or other components.

[0093] Optionally, the step of filling the gap with slurry until the gap is full includes controlling the rotation of the bearing device to drive the housing 12 to rotate synchronously.

[0094] It should be noted that the supporting device here can be a turntable structure, which can be a flat plate structure or a box structure, and the shell 12 can be placed on the turntable.

[0095] The embodiments of this application involve placing the housing 12 on a rotating support device while filling the gap with slurry until the gap is full, so that the housing 12 rotates synchronously with the rotation of the support device. The structure is simple, easy to operate, and easy to implement.

[0096] Optionally, the slurry is cured to form the insulating layer 14 by heating and curing the slurry into a solid state. In other words, the insulating layer 14 can be achieved by controlling the heating element to operate at a preset heating temperature and using the heating element to heat the housing and / or the slurry; and controlling the heating element to stop operating when the preset heating time is reached.

[0097] It should be noted that the slurry here is usually a liquid slurry, which needs to be cured to form a solid insulating layer 14. There are many ways to cure the slurry, such as using electron beam curing or ultraviolet curing. In the embodiments of this application, the slurry is cured by heat curing.

[0098] The embodiments of this application use heat curing to turn the slurry into a solid state, which can achieve rapid curing of the slurry. This allows the slurry to adhere more firmly to the inner surface of the housing 12 after curing, reducing the probability of the insulation layer 14 falling off.

[0099] Optionally, the preset heating temperature range for curing the slurry to form a solid insulating layer 14 on the inner wall of the housing 12 is 50°C to 180°C, and the heating time ranges from 0.5 minutes to 15 minutes.

[0100] Specifically, the heating temperature for the curing slurry to form a solid insulating layer 14 on the inner wall of the housing 12 is 80°C and the heating time is 5 minutes. The preset heating temperature for the curing slurry to form a solid insulating layer 14 is 150°C and the heating time is 3 minutes.

[0101] The embodiments of this application, by setting the preset heating temperature range to 50°C to 180°C and the heating time range to 0.5 minutes to 15 minutes, can evaporate the solvent in the slurry without affecting the chemical properties or insulation properties of the slurry.

[0102] Optionally, the preset heating temperature range for curing the slurry to form the insulating layer 14 is 100°C to 150°C, and the heating time ranges from 5 minutes to 10 minutes.

[0103] Specifically, the curing slurry is heated at a preset temperature of 80°C for 5 minutes to form the insulating layer 14, and the curing slurry is heated at a preset temperature of 150°C for 3 minutes to form the insulating layer 14 on the inner wall of the housing 12.

[0104] The embodiments of this application, by setting the preset heating temperature range to 100°C to 150°C and the heating time range to 5 minutes to 10 minutes, can quickly evaporate the solvent in the slurry without affecting the chemical properties or insulation properties of the slurry.

[0105] Optionally, the method of manufacturing the battery cell 10 may further include removing the filler 600 from the receiving cavity 121.

[0106] In the embodiments of this application, the electrode assembly 11 can be easily inserted into the receiving cavity 121 by removing the filler 600 from the receiving cavity 121, which facilitates the installation of the battery cell 10.

[0107] Embodiments of this application also provide a manufacturing apparatus for a battery cell 10, which is used to implement the manufacturing method of the battery cell 10 mentioned in the above embodiments. The manufacturing apparatus includes a liquid injection device 500 and a filler 600, wherein the liquid injection device 500 is used to fill the gap between the outer surface of the filler 600 and the inner surface of the housing 12 with slurry to form an insulating layer 14 on the inner surface of the housing 12.

[0108] The battery cell 10 manufacturing apparatus of the embodiments of this application can form an insulating layer 14 made of slurry on the inner surface of the housing 12, thereby achieving insulation isolation between the housing 12 and the electrode assembly 11, effectively isolating the housing 12 and the electrode assembly 11.

[0109] Optionally, such as Figure 5 As shown, the manufacturing apparatus includes a liquid injection device 500, which includes a pusher 501, a slurry chamber 502, and a liquid outlet 503. The liquid outlet 503 is connected to the slurry chamber 502. At least part of the pusher 501 is movably disposed in the slurry chamber 502 to squeeze the slurry in the slurry chamber 502 out of the liquid outlet 503.

[0110] It should be noted that, as Figure 7 As shown, the slurry chamber 502 includes a first chamber 5021 and a second chamber 5022 that are interconnected. The first chamber 5021 is cylindrical and the second chamber 5022 is an inverted conical structure, which facilitates the flow of slurry from the first chamber 5021 to the second chamber 5022 and facilitates the flow of slurry from the outlet 503.

[0111] The embodiments of this application include a liquid injection device 500, which includes a pusher head 501, a slurry chamber 502, and a liquid outlet 503. The liquid outlet 503 is connected to the slurry chamber 502. At least part of the pusher head 501 is movably disposed in the slurry chamber 502 to squeeze the slurry in the slurry chamber 502 out of the liquid outlet 503. The movement of the pusher head 501 can squeeze the slurry in the slurry chamber 502 out of the liquid outlet 503, thereby facilitating the filling of the gap with the squeezed slurry.

[0112] In some embodiments of this application, the manufacturing apparatus further includes a filler 600, at least a portion of which is disposed within the receiving cavity 121 of the housing 12 of the battery cell 10.

[0113] In the embodiments of this application, by providing a filler 600 and placing at least a portion of the filler 600 within the receiving cavity 121 of the housing 12 of the battery cell 10, a gap can be formed between the filler 600 and the housing 12. After the slurry is filled into the gap, an insulating layer 14 can be formed, thereby isolating the housing 12 and the electrode assembly 11 through the insulating layer 14.

[0114] like Figure 6 and Figure 7 As shown, the filler 600 includes a guide portion 601 and a filling portion 602 connected sequentially along a first direction. At least a portion of the filling portion 602 is disposed within the receiving cavity 121. The guide portion 601 is disposed closer to the injection device 500 than the filling portion 602, so as to guide the slurry extruded by the injection device 500 into the gap formed by the housing 12 and the filler 600. The first direction is the height direction of the housing 12.

[0115] The first direction mentioned here is... Figure 3 The XX direction refers to the height direction of the casing 12, and the YY direction refers to the second direction, which is the length direction of the battery cell 10. The guide part 601 is located above the filling part 602. The filling part 602 can be entirely located in the receiving cavity 121, or it can be partially located in the receiving cavity 121.

[0116] The gap formed by the housing 12 and the filler 600 has five locations. Four gaps are located between the inner surface of the side of the housing 12 and the side of the filler 600, and one gap is located between the inner surface of the bottom of the housing 12 and the bottom of the filler 600. Therefore, after the insulation layer 14 is prepared, the shape of the insulation layer 14 is consistent with the inner surface of the housing 12.

[0117] In the embodiments of this application, a guide portion 601 and a filling portion 602 are sequentially connected along a first direction. At least a portion of the filling portion 602 is located within the receiving cavity 121. The guide portion 601 is located closer to the injection device 500 than the filling portion 602, so as to guide the slurry extruded from the injection device 500 into the gap formed by the housing 12 and the filling member 600. This allows the slurry extruded from the outlet 503 to flow along the guide portion 601 and into the gap between the filling member 600 and the housing 12.

[0118] In some embodiments of this application, such as Figure 6 and Figure 7 As shown, the shape of the filling part 602 is consistent with the shape of the housing 12.

[0119] The filling part 602 can be rectangular, in which case the shell 12 is a rectangular cylindrical structure. Alternatively, the filling part 602 can be cylindrical, in which case the shell 12 is a cylindrical structure.

[0120] In the embodiments of this application, by matching the shape of the filling portion 602 with the shape of the housing 12, the gap between the filling portion 602 and the housing 12 can be easily controlled, so that the thickness of the insulating layer 14 is substantially consistent at different positions.

[0121] Optionally, such as Figure 6 and Figure 7 As shown, the filling part 602 is a rectangular structure that is adapted to the internal shape of the housing 12; the guide part 601 is a frustum structure, and the frustum structure includes a large end 6012 and a small end 6011. The large end 6012 is connected to the filling part 602, and the small end 6011 is disposed facing the liquid outlet 503.

[0122] The truncated cone structure here can be a four-truncated cone structure. In addition to the small end 6011, the guide part 601 also has four guide surfaces. After the slurry flows to the small end 6011, the slurry can enter the gap along the four guide surfaces respectively. The large end 6012 and the small end 6011 are arranged opposite to each other.

[0123] In the embodiments of this application, the housing 12 is configured as a rectangular cylindrical structure, wherein the filling part 602 is a rectangular body structure; the guiding part 601 is a frustum structure, and the small end 6011 of the frustum structure is set facing the liquid outlet 503, so that the slurry squeezed out of the liquid outlet 503 can flow to the small end 6011 and then flow along the side of the guiding part 601 and enter the gap between the filling part 602 and the housing 12 to fill the gap.

[0124] In some embodiments of this application, the outlet 503 has a projection on the small end 6011, the projection is within the range of the small end 6011, and the outlet 503 is disposed toward the center of the small end 6011.

[0125] It should be noted that the center of the outlet 503 is positioned opposite to the center of the small end 6011. The small end 6011 can be a rectangular plate structure. After the slurry from the outlet 503 flows to the center of the small end 6011, it flows along the four guide surfaces of the guide part 601, guiding the slurry into the gap.

[0126] In the embodiments of this application, by projecting the outlet 503 onto the small end 6011, wherein the projection is within the range of the small end 6011 and the outlet 503 is arranged toward the center of the small end 6011, all the liquid flowing out of the outlet 503 can pass through the small end 6011 and flow along the side of the guide portion 601, so that the slurry flows evenly along the side of the guide portion 601.

[0127] Optionally, such as Figure 6 and Figure 7 As shown, the filler 600 also includes a support 603, which is connected to either the guide 601 or the filler 602, and the support 603 abuts against the end of the housing 12 facing the injection device 500.

[0128] The support 603 here can be a support rod structure, and the size of the support 603 is relatively small compared to the size of the shell 12, so its obstruction effect on the slurry is limited and can be ignored.

[0129] In the embodiments of this application, a support portion 603 is provided, which is connected to one of the guide portion 601 and the filling portion 602. The support portion 603 abuts against the end of the housing 12 facing the liquid injection device 500. Thus, the support portion 603 can support the guide portion 601 and the filling portion 602, so that there is also a gap between the bottom of the filling portion 602 and the housing 12. This allows the entire inner surface of the housing 12 to be covered with the insulating layer 14, achieving insulation isolation between the housing 12 and the electrode assembly 11.

[0130] Optionally, such as Figure 7 As shown, the portion of the filling part 602 near the guide part 601 is connected to the support part 603.

[0131] It should be noted that the support part 603 is connected to the upper part of the filling part 602. Through the contact between the support part 603 and the housing 12, a gap can be formed between the bottom of the filling part 602 and the bottom of the housing 12, so that the slurry can flow into the gap between the bottom of the filling part 602 and the bottom of the housing 12.

[0132] In the embodiments of this application, by connecting the portion of the filling part 602 near the guide part 601 to the support part 603, the support part 603 can be connected to the portion of the filling part 602 near the injection device 500, thereby reducing the volume of the filling part 600 and thus reducing the cost of the filling part 600.

[0133] Optionally, there may be multiple support portions 603, and the multiple support portions 603 are arranged at circumferential intervals along the filling portion 602.

[0134] There can be two support parts 603, which are symmetrically arranged on both sides of the filling part 602. Alternatively, there can be four support parts 603, which are connected to the four sides of the filling part 602 respectively, so that the filling part 602 can be stably placed in the receiving cavity 121.

[0135] In the embodiments of this application, by setting the number of support portions 603 to multiple, and the multiple support portions 603 are arranged at intervals along the circumference of the filling portion 602, the filling member 600 can be stably placed in the accommodating cavity 121 through the multiple support portions 603, reducing the probability of the filling member 600 tilting and reducing the probability of the filling member 600 contacting the bottom of the housing 12.

[0136] Optionally, the filler 600 is a one-piece structure. By setting the filler 600 as a one-piece structure in the embodiments of this application, the processing of the filler 600 can be facilitated and the processing steps of the manufacturing apparatus can be reduced.

[0137] Optionally, the filler 600 has a non-wetting surface. In the embodiments of this application, by having the filler 600 have a non-wetting surface, the slurry can be prevented from adhering to the surface of the filler block, and the surface of the insulating layer 14 remains flat when the filler block is removed, so that the electrode assembly 11 can smoothly enter the receiving cavity 121.

[0138] The filler 600 here can be made of a non-wetting material, which can keep the filler 600 from wetting the slurry. Alternatively, a non-wetting coating can be applied to the surface of the filler 600, which can also make the filler 600 and the slurry non-wetting.

[0139] Optionally, the injection device 500 further includes a first valve 504 and a second valve 505, wherein the first valve 504 is used to control the state of the outlet 503, and the second valve 505 is used to control the opening and closing of the slurry delivery pipe 700 for delivering slurry into the slurry chamber 502, and the slurry delivery pipe 700 is connected to the slurry tank (not shown).

[0140] The manufacturing method of the battery cell 10 will now be described in chronological order.

[0141] Place the housing 12 onto the turntable and secure it using a tooling fixture;

[0142] The filler 600 is placed into the receiving cavity 121 of the housing 12, so that the gap between the filler 600 and the inner wall of the housing 12 is basically the same, and the bottom of the filler 600 is also a certain distance from the inner surface of the bottom of the housing 12. At this time, the size of the gap is the thickness of the insulating layer 14.

[0143] The injection device 500 is placed above the filler 600, and the outlet 503 is positioned opposite the small end 6011.

[0144] Open the first valve 504.

[0145] The pusher head 501 is pushed downwards, causing the slurry to be squeezed out from the outlet 503 and flow into the gap.

[0146] Close the first valve 504 and restore the pusher 501 to its original state.

[0147] The housing 12 with filler 600 is heated and cured, so that the slurry adheres to the inner surface of the housing 12 to form an insulating layer 14.

[0148] Remove the filler 600 from the receiving cavity 121.

[0149] The electrode assembly 11 is placed into the receiving cavity 121 to achieve insulation isolation between the electrode assembly 11 and the housing 12.

[0150] Open the second valve 505 to deliver slurry into the slurry chamber 502.

[0151] Repeat the process mentioned above to process the casing 12 of the next battery cell 10.

[0152] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0153] A first aspect of this application provides a manufacturing apparatus for a battery cell 10. The battery cell 10 includes a housing 12. The manufacturing apparatus for the battery cell 10 includes a liquid injection device 500 and a filler 600. The liquid injection device 500 is used to fill a slurry into the gap between the outer surface of the filler 600 and the inner surface of the housing 12 to form an insulating layer on the inner surface of the housing 12. Further, the liquid injection device 500 includes a pusher 501, a slurry chamber 502, and a liquid outlet 503. The liquid outlet 503 communicates with the slurry chamber 502. At least a portion of the pusher 501 is movably disposed within the slurry chamber 502 to extrude the slurry from the slurry chamber 502 through the liquid outlet 503. Further, at least a portion of the filler 600 is disposed within a receiving cavity 121 of the housing 12 of the battery cell 10. Further, the filler 600 includes a guide portion 601 and a filling portion 602 connected sequentially along a first direction, wherein at least a portion of the filling portion 602 is disposed within the receiving cavity 121, and the guide portion 601 is disposed closer to the injection device 500 than the filling portion 602, so as to guide the slurry extruded from the injection device 500 into the gap formed by the housing 12 and the filler 600, wherein the first direction is the height direction of the housing 12. Further, the shape of the filling portion 602 is consistent with the shape of the housing 12. Further, the filling portion 602 is a rectangular structure adapted to the internal shape of the housing 12; the guide portion 601 is a frustum-shaped structure, and the frustum-shaped structure includes a large end 6012 and a small end 6011, the large end 6012 being connected to the filling portion 602, and the small end 6011 facing the outlet 503. Furthermore, the outlet 503 has a projection on the small end 6011, the projection being within the range of the small end 6011, and the outlet 503 is positioned towards the center of the small end 6011. Furthermore, the filler 600 also includes a support portion 603, which is connected to one of the guide portion 601 and the filling portion 602, and the support portion 603 abuts against the end of the housing 12 facing the injection device 500. Furthermore, the portion of the filling portion 602 near the guide portion 601 is connected to the support portion 603. Furthermore, there are multiple supports 603, and the multiple supports 603 are spaced apart circumferentially along the filling portion 602. Furthermore, the filler 600 is a one-piece structure, and / or, the filler 600 has a non-wetting surface.

[0154] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An apparatus for manufacturing a battery cell including a case, characterized by, The manufacturing device comprises a liquid injection apparatus and a filling piece, wherein the liquid injection apparatus is used to fill slurry into a gap between an outer surface of the filling piece and an inner surface of the shell to form an insulation layer on the inner surface of the shell.

2. The battery cell manufacturing apparatus according to claim 1, wherein The liquid injection apparatus comprises a push head, a slurry cavity, and a liquid outlet, the liquid outlet being in communication with the slurry cavity, and at least part of the push head being movably arranged in the slurry cavity to extrude slurry in the slurry cavity from the liquid outlet.

3. The battery cell manufacturing apparatus according to claim 2, wherein At least part of the filling piece is arranged in a receiving cavity of the shell of the battery cell.

4. The battery cell manufacturing apparatus according to claim 3, wherein The filling piece comprises a guide portion and a filling portion connected in sequence along a first direction, wherein at least part of the filling portion is arranged in the receiving cavity, the guide portion is arranged closer to the liquid injection apparatus than the filling portion, so as to guide the slurry extruded by the liquid injection apparatus into the gap surrounded by the shell and the filling piece, and the first direction is a height direction of the shell.

5. The battery cell manufacturing apparatus according to claim 4, wherein The shape of the filling portion is consistent with the shape of the shell.

6. The battery cell manufacturing apparatus according to claim 4, wherein The filling portion is a rectangular body structure adapted to the internal shape of the shell. The guide portion is a frustum body structure, and the frustum body structure comprises a large end and a small end, the large end is connected with the filling portion, and the small end is arranged to face the liquid outlet.

7. The battery cell manufacturing apparatus according to claim 6, wherein The liquid outlet has a projection on the small end, the projection is within the range of the small end, and the liquid outlet is arranged towards the center of the small end.

8. The battery cell manufacturing apparatus according to claim 4, wherein The filling piece further comprises: a support portion connected with one of the guide portion and the filling portion, and the support portion abuts against an end of the shell facing the liquid injection apparatus.

9. The battery cell manufacturing apparatus according to claim 8, wherein The part of the filling portion close to the guide portion is connected with the support portion.

10. The battery cell manufacturing apparatus according to claim 8, wherein The number of the support portions is plural, and the plural support portions are arranged in a circumferential direction of the filling portion.

11. The battery cell manufacturing apparatus according to any one of claims 1 to 10, wherein The filling piece is an integral structure, and / or the filling piece has a non-wetting surface.

12. A battery cell, characterized by The battery cell is made by the manufacturing device of the battery cell according to any one of claims 1 to 11.

13. A battery device characterized by comprising: Comprise: a battery box: and The battery cell according to claim 12 is arranged in the battery box.

14. An electrical device, characterized by The battery device according to claim 13 is used to store or provide electric energy.

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