Injection molding machine, battery monomer, battery device and power utilization device

Abstract

The utility model discloses an injection molding machine, a battery monomer, a battery device and a power utilization device. The injection molding machine comprises a power mechanism, an injection mold and an injection inner mold, a fixing space used for mounting a shell is formed in the injection mold, the injection inner mold is used for being placed in a containing space in the shell, and a gap is formed between the injection inner mold and the surface, facing the containing space, of the shell; the power mechanism is connected with the injection mold through a pipeline and communicates with an inlet of the injection runner, and an outlet of the injection runner communicates with the gap; the power mechanism is used for enabling injection molding materials to flow into the gap through the injection molding runner so that an insulating layer can be formed on the surface, facing the containing space, of the shell. According to the injection molding machine, the insulating layer can be formed on the surface, facing the accommodating space, of the shell, so that the phenomenon that the insulating layer is easy to fall off when the shell is formed is avoided to a certain extent.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to an injection molding machine, a battery cell, a battery device, and an electrical device. Background Technology

[0002] Currently, a battery cell consists of a casing and an electrode assembly, with the electrode assembly located within the casing's accommodating space. In related technologies, a Mylar film is used as an insulating layer to wrap the electrode assembly to prevent short circuits between the casing and the electrode assembly. However, the Mylar film is prone to detachment, leading to insulation failure. Utility Model Content

[0003] In view of the above problems, this application provides an injection molding machine, a battery cell, a battery device, and an electrical device, which can solve the problem of insulation failure caused by easy peeling of the insulation layer to a certain extent.

[0004] In a first aspect, this application provides an injection molding machine, including a power mechanism, an injection mold, and an inner injection mold. The injection mold has a fixed space for mounting a housing. The inner injection mold is used to place a receiving space within the housing and forms a gap between it and the surface of the housing facing the receiving space. The inner injection mold has an injection channel. The power mechanism is connected to the injection mold via a pipe and communicates with the inlet of the injection channel. The outlet of the injection channel communicates with the gap. The power mechanism is used to inject molding material into the gap through the injection channel, thereby forming an insulating layer on the surface of the housing facing the receiving space.

[0005] In the above embodiments, the injection molding machine can inject the injection material into the gap through the injection channel of the injection mold. The gap is formed between the injection mold and the surface of the shell facing the accommodating space, thereby forming an insulating layer on the surface of the shell facing the accommodating space. The insulating layer has a strong adhesion to the shell, which to a certain extent avoids the phenomenon that the insulating layer is easy to fall off during the molding of the shell.

[0006] In some embodiments, the width of the gap is 130 ± 30 micrometers.

[0007] In the above embodiments, an appropriate gap width forms an insulating layer of appropriate thickness, so that the insulating layer has good insulation performance.

[0008] In some embodiments, the power mechanism includes a power component and a conveying component, the conveying component being used to convey the injection molding material into the injection molding channel, and the power component being connected to the conveying component and used to drive the conveying component to convey the injection molding material into the injection molding channel.

[0009] In the above embodiments, the power component and the conveying component cooperate with each other to ensure that the injection molding material is effectively conveyed and enters the injection mold to a certain extent.

[0010] In some embodiments, the power component includes an air compressor, the delivery component includes a screw pump, and the air compressor is connected to the screw pump via an air compressor pipeline.

[0011] In the above embodiments, the air compressor drives the screw pump through the air compressor pipeline to deliver the injection molding material into the injection molding channel, so that the injection molding material enters the injection molding channel at a relatively stable and consistent rate, thereby improving the molding quality of the insulation layer to a certain extent.

[0012] In some embodiments, the injection molding machine includes a feeding component disposed on a pipeline between the conveyor and the injection mold, and the feeding component has a feeding port.

[0013] In the above embodiments, the injection molding material can enter the feeding component through the feed port and reach the conveying component, so that the conveying component can transport the injection molding material into the injection flow channel.

[0014] In some embodiments, the injection mold includes a first surface, a second surface, and a circumferential surface. The first surface and the second surface are disposed opposite to each other along a first direction, and the circumferential surface is disposed around the first direction. The inlet of the injection channel is disposed on the first surface, and the outlet of the injection channel is disposed on the second surface and the circumferential surface.

[0015] In the above embodiments, the injection molding material can be injected through the injection channel and uniformly fill the gaps to form a relatively uniform insulating layer to a certain extent.

[0016] In some embodiments, the injection molding runner includes a main runner and a plurality of branch runners, wherein the inlet of the main runner serves as the inlet of the injection molding runner, the outlet of the main runner is connected to the inlet of the branch runner, and the outlet of the branch runner serves as the outlet of the injection molding runner.

[0017] In the above embodiments, the injection molding material can flow through the main runner and branch runner to the gap between the surface of the injection mold and the surface of the shell facing the accommodating space, which to a certain extent makes the thickness of the insulating layer consistent.

[0018] In some embodiments, the main flow channel includes a first flow channel and a second flow channel. The injection mold has an injection outlet on its surface facing the fixed space. The injection outlet is aligned and connected to the first flow channel. The first flow channel and the second flow channel are connected sequentially in a direction away from the injection outlet. The inner diameter of the first flow channel is larger than the inner diameter of the second flow channel.

[0019] In the above embodiments, by making the inner diameter of the first flow channel larger than the inner diameter of the second flow channel, the injection molding material can be prevented from clogging the injection outlet, and the efficiency of injection molding can be improved to a certain extent.

[0020] In some embodiments, the injection mold includes a first mold and a second mold, the first mold and the second mold being detachably connected, the first mold and the second mold together forming the fixed space.

[0021] In the above embodiments, the housing can be fixed inside the injection mold for injection molding.

[0022] In some embodiments, the injection molding machine includes a cooling pipe, and the injection mold has a cooling channel. The cooling pipe is connected to the injection mold and communicates with the cooling channel.

[0023] In the above embodiments, cooling water can cool the injection mold through cooling pipes, thereby improving injection efficiency to a certain extent.

[0024] In some embodiments, the inner injection mold is fixedly connected to the injection mold such that the gap between it and the surface of the housing facing the receiving space maintains the desired width.

[0025] In the above embodiments, the injection mold can be accurately positioned within the accommodating space of the housing.

[0026] In some embodiments, one of the injection mold and the injection mold is provided with a positioning hole, and the other is provided with a positioning post. The positioning post is embedded in the positioning hole to position the relative position of the injection mold and the injection mold.

[0027] In the above embodiments, the cooperation between the positioning hole and the positioning pin ensures, to a certain extent, a relatively accurate relative position between the inner injection mold and the injection mold.

[0028] Secondly, this application provides a battery cell, which includes a housing and an electrode assembly. An accommodating space is formed inside the housing, and the electrode assembly is disposed in the accommodating space. An insulating layer is provided on the surface of the housing facing the accommodating space, and the insulating layer separates the electrode assembly from the housing. The insulating layer is formed by the injection molding machine described in any of the above embodiments.

[0029] In some embodiments, the housing includes a shell and an end cap, the housing having the accommodating space formed therein, one side of the shell having an opening communicating with the accommodating space, the end cap being disposed at the opening, and the insulating layer being disposed on the surface of the shell facing the accommodating space.

[0030] In the above embodiments, the insulating layer separates the housing and the battery cells to prevent short circuits between the housing and the electrode assembly.

[0031] Thirdly, this application provides a battery device, which includes the battery cell described in the above embodiments.

[0032] Fourthly, this application provides an electrical device, which includes a battery cell as described in the above embodiments, the battery cell being used to provide electrical energy, or a battery device as described in the above embodiments, the battery device being used to provide electrical energy.

[0033] 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

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0036] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the structure of an injection molding machine according to some embodiments of this application;

[0038] Figure 4 This is a front view of an injection molding machine according to some embodiments of this application;

[0039] Figure 5 This is a partial structural schematic diagram of an injection molding machine according to some embodiments of this application;

[0040] Figure 6 This is a schematic diagram of the structure of the injection mold in some embodiments of this application;

[0041] Figure 7 for Figure 6 A cross-sectional view of the injection mold along line AA;

[0042] Figure 8 for Figure 6 A cross-sectional view of the injection mold along the BB line;

[0043] Figure 9 This is a schematic diagram of the housing structure of some embodiments of this application;

[0044] Figure 10 for Figure 9 A cross-sectional view of the shell along the CC line;

[0045] Figure 11 This is a flowchart illustrating the operation of an injection molding machine according to some embodiments of this application;

[0046] Figure 12 This is a perspective view of a battery cell according to some embodiments of this application;

[0047] Figure 13 This is an exploded view of a battery cell according to some embodiments of this application.

[0048] The reference numerals in the detailed embodiments are as follows:

[0049] 1000 vehicles;

[0050] Battery unit 300, controller 400, motor 500;

[0051] The enclosure is 150mm thick, the first part is 16mm thick, and the second part is 18mm thick.

[0052] Battery cell 100, casing 98, electrode assembly 96, tab 96a;

[0053] Housing 90, end cap 92, electrode terminal 92a, pressure relief mechanism 92b;

[0054] Accommodation space 10, insulation layer 12;

[0055] 200 injection molding machine;

[0056] Power unit 20, air pump 22, air pipeline 24, screw pump 26;

[0057] Injection mold 30, first mold 32, second mold 34, fixing space 36, positioning hole 38;

[0058] Injection mold 40, injection runner 42, main runner 421, main runner inlet 4212, main runner outlet 4214, first runner 4216, second runner 4218, branch runner 423, branch runner inlet 4232, branch runner outlet 4234, first surface 44, second surface 46, circumferential surface 48;

[0059] Feed component 50, feed inlet 52;

[0060] Cooling pipe 60, water inlet pipe 62, water outlet pipe 64;

[0061] Pipeline 70;

[0062] Valve 80. Detailed Implementation

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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).

[0069] 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 are not intended to 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.

[0070] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0071] Currently, market trends show that the application scope of power batteries is expanding rapidly. Besides playing a crucial role in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, power batteries are also widely used in various electric vehicles such as electric bicycles, electric motorcycles, and electric cars. Furthermore, they are widely used in high-tech fields such as military equipment and aerospace. With the continuous expansion of power battery applications, market demand for them is also continuously growing.

[0072] The battery cell is a crucial component of a power battery, responsible not only for the efficient storage and release of electrical energy but also for ensuring safety and reliability during use. A battery cell comprises electrode assemblies and a casing. The electrode assemblies, located within the casing, are the core area for energy conversion within the battery cell. The casing not only provides physical protection for the electrode assemblies but also acts as an isolator and fixator, ensuring their proper functioning. To ensure the safe operation of the battery cell and prevent short circuits between the casing and the electrode assemblies, a Mylar film can be used as an insulating layer to encase the electrode assemblies. This insulating layer effectively isolates the casing and electrode assemblies, avoiding short circuits caused by direct contact, thereby improving the safety performance of the power battery.

[0073] However, Mylar membranes present several challenges in practical applications. First, they are prone to detachment due to insufficient adhesion between the Mylar membrane and the electrode assembly surface, or due to external forces during battery assembly and transportation. Second, the Mylar coating process is complex, requiring precise control of the membrane's thickness and position to ensure the uniformity and reliability of the insulation layer. Consequently, Mylar membranes are susceptible to detachment and displacement during the coating process, affecting their insulation performance and increasing the risk of short circuits in individual battery cells.

[0074] Based on the above considerations, in order to address the problem of insulation failure caused by easy detachment of the insulation layer to a certain extent, this application provides an injection molding machine. The injection molding machine includes a power mechanism, an injection mold, and an inner injection mold. The injection mold has a receiving space for mounting the housing. The inner injection mold is used to place the receiving space within the housing and forms a gap between it and the surface of the housing facing the receiving space. The inner injection mold has an injection flow channel. The power mechanism is connected to the injection mold through a pipe and communicates with the inlet of the injection flow channel. The outlet of the injection flow channel communicates with the gap. The power mechanism is used to inject injection material into the gap through the injection flow channel, thereby forming an insulation layer on the surface of the housing facing the receiving space.

[0075] In the technical solution of this application embodiment, the injection molding machine can inject injection material into the gap through the injection channel of the injection mold. The gap is formed between the injection mold and the surface of the shell facing the accommodating space, thereby forming an insulating layer on the surface of the shell facing the accommodating space. The insulating layer has a strong adhesion to the shell, which to a certain extent avoids the phenomenon of insulation failure caused by the insulating layer easily falling off.

[0076] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, cuboid / square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0077] The battery apparatus 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 connected in series, parallel, or mixed connections via a busbar.

[0078] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0079] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0080] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0081] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0082] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0083] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0084] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0085] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0086] 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.

[0087] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0088] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 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 300 is provided inside the vehicle 1000, and the battery device 300 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 300 can be used to power the vehicle 1000; for example, the battery device 300 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 400 and a motor 500. The controller 400 is used to control the battery device 300 to supply power to the motor 500, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0089] In some embodiments of this application, the battery device 300 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0090] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 300 according to some embodiments of this application. The battery device 300 includes a housing 150 and a battery cell 100, with the battery cell 100 housed within the housing 150. The housing 150 provides a accommodating space for the battery cell 100, and the housing 150 can adopt various structures. In some embodiments, the housing 150 may include a first portion 16 and a second portion 18, which overlap each other, jointly defining a accommodating space for accommodating the battery cell 100. The second portion 18 may be a hollow structure with one open end, and the first portion 16 may be a plate-like structure, with the first portion 18 covering the open side of the second portion 18 so that the first portion 16 and the second portion 18 jointly define the accommodating space; alternatively, the first portion 16 and the second portion 18 may both be hollow structures with one open side, with the open side of the first portion 16 covering the open side of the second portion 18. Of course, the box 150 formed by the first part 16 and the second part 18 can be of various shapes, such as cylinder, cuboid, etc.

[0091] In the battery device 300, there can be multiple battery cells 100, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 100 are connected in both series and parallel connections. Multiple battery cells 100 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 100 is housed within the housing 150. Alternatively, the battery device 300 can also consist of multiple battery cells 100 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 150. The battery device 300 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 100.

[0092] According to some embodiments of this application, please refer to Figures 3 to 10 This application provides an injection molding machine 200, which includes a power mechanism 20, an injection mold 30, and an inner injection mold 40. The injection mold 30 has a fixed space 36 for mounting a housing 90. The inner injection mold 40 is placed in a receiving space 10 within the housing 90, and a gap is formed between it and the surface of the housing 90 facing the receiving space 10. The inner injection mold 40 has an injection channel 42. The power mechanism 20 is connected to the injection mold 30 via a pipe 70 and communicates with the inlet of the injection channel 42. The outlet of the injection channel 42 communicates with the gap. The power mechanism 20 is used to inject molding material into the gap through the injection channel 42, thereby forming an insulating layer 12 on the surface of the housing 90 facing the receiving space 10.

[0093] Specifically, please combine Figures 3 to 5 The injection molding machine 200 includes a power unit 20, an injection mold 30, and an inner injection mold 40. The power unit 20 provides the necessary power to the injection molding machine 200 and is connected to the injection mold 30 via a pipe 70. The injection material can be in a molten state. When the power unit 20 is working, it can cause the injection material to flow and enter the gap between the inner injection mold 40 and the surface of the housing 90 facing the receiving space 10, thereby forming an insulating layer.

[0094] exist Figure 5 In the injection mold 30, a fixed space 36 is provided, and the housing 90 can be fixed within the fixed space 36. The injection molding machine 200 also includes a controller, and a position sensor is provided within the injection mold 30. The controller is electrically connected to the position sensor. The position sensor can detect whether the housing 90 has entered a preset position within the fixed space 36. If the housing 90 has entered the preset position within the fixed space 36, the controller controls the injection molding machine 200 to proceed to the next step; if the housing 90 has not entered the preset position within the fixed space 36, the controller issues an alarm signal and stops the injection molding machine 200 while it is operating.

[0095] Please combine Figure 9 and Figure 13 The battery cell 100 includes an electrode assembly 96 and a housing 90. The housing 90 is formed by processes including but not limited to stamping and stretching. The housing 90 has an accommodating space 10. The electrode assembly 96 is accommodated in the accommodating space 10. An insulating layer 12 is provided on the surface of the housing 90 facing the accommodating space 10. The insulating layer 12 can separate the electrode assembly 96 and the housing 90 to prevent short circuit between the housing 90 and the electrode assembly 96.

[0096] During the injection molding process, the inner injection mold 40 is placed into the receiving space 10 of the housing 90. Please refer to... Figures 6 to 8 The injection mold 40 has an injection runner 42, which forms a gap with the surface of the housing 90 facing the receiving space 10. When the injection mold 40 reaches the set position within the receiving space 10, the controller controls the power mechanism 20 to start working. The power mechanism 20 is connected to the injection mold 30 via a pipe 70 and is connected to the inlet of the injection runner 42. The outlet of the injection runner 42 is connected to the gap. The power mechanism 20 injects and fills the gap by sequentially passing the injection material through the pipe 70, the inlet of the injection runner 42, the injection runner 42, and the outlet of the injection runner 42, thereby allowing the insulating layer 12 to be cured and formed on the surface of the housing 90 facing the receiving space 10. The insulating layer 12 is formed on the already formed housing 90 through the injection molding process. The insulating layer 12 has a strong adhesion to the housing 90, which can prevent the phenomenon of insulation failure caused by the insulating layer 12 easily falling off.

[0097] After the entire injection molding process is completed and the insulating layer 12 has cooled, the housing 90 and the injection mold 40 are demolded. After demolding, the housing 90 is cleaned and dried, and finally, the appearance of the housing 90 is inspected.

[0098] This application does not specifically limit the material of the casing 90 of the battery cell 100. In one example, the casing 90 may be made of aluminum or other metal materials.

[0099] Therefore, the injection molding machine 100 can inject injection material into the gap through the injection channel 42 of the injection mold 40. This gap is formed between the injection mold 40 and the surface of the housing 90 facing the receiving space 10, thereby forming an insulating layer 12 on the surface of the housing 90 facing the receiving space 10. Because the structure of the housing 90 is relatively stable, the adhesion between the insulating layer 12 and the housing 90 is strong, which to a certain extent avoids the phenomenon of insulation failure caused by the insulating layer 12 easily falling off.

[0100] According to some embodiments of this application, optionally, the width of the gap is 130 ± 30 micrometers.

[0101] Specifically, during the injection molding process, the injection mold 40 is installed within the accommodating space 10, and a gap exists between it and the surface of the housing 90 facing the accommodating space 10. During injection molding, injection material is injected into the gap and fills the entire gap. Since the width of the gap is fixed, the injection material injected into the gap cures within the gap, forming an insulating layer 12 that matches the gap width. Therefore, the width of the gap determines the thickness of the insulating layer 12. If the gap width is too small, the resulting insulating layer 12 will be too thin, resulting in poor insulation and an inability to effectively isolate current, increasing the risk of short circuits and electrical breakdown. If the gap width is too large, the resulting insulating layer 12 will be too thick, reducing processing precision, affecting the overall quality of the battery cell 100, and increasing unnecessary costs. Therefore, an appropriate gap width can, to a certain extent, ensure the insulation performance of the formed insulating layer 12 and the safety and reliability of the battery cell 100.

[0102] In this embodiment, the gap width is 130 micrometers ± 30 micrometers, meaning the gap width can be between 100 micrometers and 160 micrometers, and the thickness of the formed insulating layer 12 is between 100 micrometers and 160 micrometers. The gap width D is 130 ± 30 micrometers, which means 100 micrometers ≤ D ≤ 160 micrometers. In one example, the gap width D can be 100 micrometers, 105 micrometers, 110 micrometers, 115 micrometers, 120 micrometers, 125 micrometers, 130 micrometers, 135 micrometers, 140 micrometers, 145 micrometers, 150 micrometers, 155 micrometers, 160 micrometers, or other values ​​greater than or equal to 100 micrometers and less than or equal to 160 micrometers.

[0103] The material of the insulating layer 12 can be specifically defined according to the actual situation, and this application does not make a specific limitation. In one example, the material of the insulating layer 12 can be a polyester film.

[0104] Therefore, an appropriate gap width allows the injection molding material injected and filling the gap to form an insulating layer 12 of appropriate thickness, so that the insulating layer 12 has good insulation performance, while taking into account the size, weight and cost-effectiveness of the battery.

[0105] According to some embodiments of this application, optionally, the power mechanism 20 includes a power component and a conveying component, the conveying component being used to convey injection molding material into the injection molding channel 42, and the power component being connected to the conveying component and used to drive the conveying component to convey injection molding material into the injection molding channel 42.

[0106] Specifically, the power unit 20 is an important part of the injection molding machine 200, responsible for providing the necessary power to complete the injection of molding material. Please refer to... Figure 3 and Figure 4The power mechanism 20 includes a power component and a conveying component, which are connected. The power component provides power to the conveying component to transport the injection molding material, driving the conveying component to operate. Once the housing 90 and the injection mold 40 are in place, the controller controls the power component and the conveying component to operate. The conveying component transports the injection molding material into the injection channel 42, injecting the material into the gap between the outer surface of the injection mold 40 and the surface of the housing 90 facing the accommodating space 10.

[0107] Therefore, the power components and the conveying components work together to ensure that the injection molding material is effectively conveyed and enters the injection mold to a certain extent.

[0108] According to some embodiments of this application, optionally, the power component includes an air compressor 22, and the conveying component includes a screw pump 26, with the air compressor 22 connected to the screw pump 26 via an air compressor pipeline 24.

[0109] Specifically, please combine Figure 3 and Figure 4 The power components include an air compressor 22, a mechanical device that compresses and stores air to generate power. The conveying components include a screw pump 26, a positive displacement pump that conveys injection molding material through the relative movement of a screw and a stator. The air compressor 22 is connected to the screw pump 26 via an air compressor line 24, thereby allowing the air compressor 22 to deliver compressed air to the screw pump 26, enabling the screw pump 26 to operate. Connection methods include, but are not limited to, welding, snap-fit, and threaded connections.

[0110] When the injection molding machine 200 starts working, after the housing 90 and the injection mold 40 are in place, the controller controls the air compressor 22 and the screw pump 26 to operate. As the piston or rotor moves inside the air compressor 22, a low-pressure zone is created inside, causing atmospheric pressure to push external air into the air compressor 22. With the movement of the piston or rotor, the air entering the air compressor 22 is compressed into a smaller space, and the pressure inside the air compressor 22 gradually increases. Once the air is compressed to a certain level, it is delivered to the screw pump 26 through the air compressor line 24. The air compressor 22 continuously cycles through the above steps, continuously generating compressed air. The screw pump 26 contains a meshing screw and stator. When compressed air reaches the screw pump 26, it drives the screw to rotate. A negative pressure is created in the space between the screw and stator at the injection material inlet, drawing the injection material into the screw pump 26. As the screw rotates, the injection material is enclosed in the space between the screw and stator and moves axially along the screw. The injection material is then transported to the outlet and enters the injection channel of the inner mold 40. Optionally, a valve 80 and a flow needle valve are provided on the pipeline. When the injection molding machine 200 is operating, valve 80 can be opened, and the flow needle valve of the injection molding machine 200 can be adjusted. Subsequently, the injection material is pushed by the screw pump 26 into the pipeline 70 between the screw pump 26 and the injection mold 30, flows into the injection channel 42, and finally is injected into the gap.

[0111] The screw pump 26 can inject molding material into the injection channel 42 in a pulsed manner (i.e., periodically and rapidly start and stop). The pulse time (i.e., the duration of the pulse) has a significant impact on the molding quality of the insulating layer 12. The pulse time directly affects the amount of molding material injected in each pulse. If the pulse time is too short, the molding material fills the gaps quickly, but it cannot guarantee that the molding material can fully fill the gaps; if the pulse time is too long, the amount of molding material injected in a single pulse is too large, which may prolong the molding cycle. Therefore, an appropriate pulse time can, to a certain extent, ensure that the molding material fully fills the gaps, cures to form a more uniform insulating layer 12, ensures the stability of the insulation performance to a certain extent, and improves the molding efficiency of the insulating layer 12 to a certain extent. The pulse time can be determined according to requirements, and this application does not limit it.

[0112] In one embodiment, the volume of the injection molding material is V1, the pulse time of the screw pump 26 is t, and the flow rate of the screw pump 26 is V2, meaning the volume of injection molding material discharged by the screw pump 26 within the pulse time t is V2. The pulse time can be obtained from t = V1 / V2. The width of the housing 90 facing the inner surface of the accommodating space 10 is T, the length is L, the height is H, and the width of the gap is D. Therefore, the volume of the injection molding material is V1 = (T × L + T × H × 2 + L × H × 2) × D; the displacement per revolution of the screw pump 26 is v, meaning the volume of injection molding material discharged by the screw pump 26 in one revolution; the number of revolutions of the screw pump 26 is n, so the flow rate of the screw pump 26 is V2 = n × v.

[0113] Thus, the air compressor 22 and the screw pump 26 work together to form a highly efficient delivery system. The compressed air generated by the air compressor 22 reaches the screw pump 22 through the air compressor pipeline 24 and drives the screw pump 26 to deliver the injection molding material into the injection molding channel 42. This allows the injection molding material to enter the injection molding channel at a relatively stable and consistent rate, thereby improving the molding quality of the insulating layer 12 to a certain extent.

[0114] According to some embodiments of this application, optionally, the injection molding machine 200 includes a feeding component 50, which is disposed on the pipeline 70 between the conveying component and the injection mold 30, and the feeding component 50 is provided with a feeding port 52.

[0115] Specifically, please combine Figure 3 and Figure 4 The feeding component 50 can be connected to the conveying component. The feeding component 50 is provided with a feeding port 52. The injection molding material can enter the feeding component 50 through the feeding port 52 and reach the conveying component. The conveying component transports the injection molding material into the injection flow channel 42 and injects it into the gap between the surface of the injection mold 40 and the housing 90 facing the accommodating space 10, where it solidifies to form an insulating layer 12.

[0116] Optionally, in one embodiment, the temperature of the injection molding material is controlled within the range of 190°C to 196°C. Within this temperature range, the injection molding material exhibits good fluidity, which helps to uniformly fill the gaps. If the temperature is too low, the injection molding material may become too viscous, leading to poor flow and insufficient filling; if the temperature is too high, the material's fluidity is too strong, potentially causing material overflow and affecting the final molding effect. A valve 80 and a temperature sensor are installed on the pipeline 70 between the screw pump 26 and the injection mold 30. The controller is electrically connected to the valve 80 and the temperature sensor. The injection molding material enters the feed component 50 through the feed port 52 and reaches the conveyor. The conveyor transports the injection molding material to the valve 80. The temperature sensor detects the temperature of the injection molding material. If the temperature is within the range of 190°C to 196°C, the controller controls the valve 80 to open, allowing the injection molding material to flow into the injection channel 42; if the temperature is outside the range of 190°C to 196°C, the controller controls the valve 80 to close and issues an alarm signal to stop operation.

[0117] The temperature T1 of the injection molding material is 190℃~196℃, that is, 190℃≤T1≤196℃. In one example, the temperature T1 of the injection molding material can be 190℃, 191℃, 192℃, 193℃, 194℃, 195℃, 196℃, or other values ​​greater than or equal to 190℃ and less than or equal to 196℃.

[0118] Thus, the injection molding material can enter the feed member 50 through the feed port 52 and reach the conveyor, so that the conveyor can transport the injection molding material into the injection flow channel 42.

[0119] According to some embodiments of this application, optionally, the injection molding inner mold 40 includes a first surface 44, a second surface 46 and a circumferential surface 48, the first surface 44 and the second surface 46 are disposed opposite to each other along a first direction, the circumferential surface 48 is disposed around the first direction, the inlet of the injection molding channel 42 is disposed on the first surface 44, and the outlet of the injection molding channel 42 is disposed on the second surface 46 and the circumferential surface 48.

[0120] Specifically, please combine Figure 9The first direction is the vertical direction. The shell 90 is cuboid, the accommodating space 10 is cuboid, and the shape of the injection mold 40 is adapted to the shape of the accommodating space 10. The first surface 44 is the upper surface of the injection mold 40, the second surface 46 is the lower surface of the injection mold 40, and the circumferential surface 48 includes the front surface, rear surface, left surface, and right surface of the injection mold 40. Optionally, the shape of the injection mold 40 can be cuboid, and the circumferential surface 48 includes front, rear, left, and right rectangular surfaces. At the same time, the edge of each surface connects with the edge of the adjacent surface to form four small chamfered surfaces. These surfaces are interconnected to form the circumferential surface of the injection mold 40. In other embodiments, the shape of the injection mold 40 can be cylindrical, the first surface is the upper bottom surface of the cylinder, the second surface is the lower bottom surface of the cylinder, and the circumferential surface 48 is the cylindrical surface of the cylinder.

[0121] The inlet of the injection runner 42 is located on the first surface 44 and is connected to the pipeline 70 between the conveying component and the injection mold 30. The outlet of the injection runner 42 is located on the second surface 46 and the circumferential surface 48. When the injection inner mold 40 is installed in the accommodating space 10 of the housing 90, there is a gap between the second surface 46 and the circumferential surface 48 and the surface of the housing 90 facing the accommodating space 10. The injection material can enter the injection runner 42 through the inlet and then be injected into and fill the gap through the outlet of the injection runner 42. The multiple outlets of the injection runner 42 can make the injection material fill the entire gap to a certain extent evenly, and solidify to form a relatively uniform insulating layer 12.

[0122] The location and number of outlets of the injection runner 42 can be specifically limited according to the actual situation, but this application does not make specific limitations in this regard.

[0123] Therefore, the injection molding material can be injected through the injection channel 42 and uniformly fill the gap, forming a relatively uniform insulating layer 12 to a certain extent, while improving the injection molding efficiency to a certain extent.

[0124] According to some embodiments of this application, optionally, the injection runner 42 includes a main runner 421 and a plurality of branch runners 423. The inlet 4212 of the main runner 421 serves as the inlet of the injection runner 42, the outlet 4214 of the main runner 421 is connected to the inlet 4216 of the branch runners 423, and the outlet 4234 of the branch runners 423 serves as the outlet of the injection runner 42.

[0125] Specifically, please combine Figures 6 to 8In the injection molding inner mold 40, the injection runner 42 includes a main runner 421 and multiple branch runners 423. The main runner 421 is located in the middle of the injection molding inner mold 40 and is the main channel in the injection runner 42. The inlet 4212 of the main runner 421 serves as the inlet of the injection runner 42 and is connected to the pipeline 70. The conveyor delivers the injection molding material into the main runner 421 through the pipeline 70. The branch runners 423 are branch channels that branch off from the main runner 421 and can evenly distribute the injection molding material to various areas of the gap. The outlet 4214 of the main runner 421 is connected to the inlet 4216 of the branch runners 423. The outlet 4234 of the branch runners 423 serves as the outlet of the injection runner 42. The injection molding material can flow from the main runner 421 to each branch runner 423 and then be injected into the gap through the outlet 4234 of the branch runners 423, where it solidifies to form a relatively uniform insulating layer 12.

[0126] The location and number of runners 423 should ensure that the injection molding material is evenly distributed to the desired area of ​​the gap, avoiding molding defects in the insulating layer 12 caused by flow imbalance. The location and number of runners 423 can be specifically limited according to actual conditions, and this application does not make specific limitations in this regard.

[0127] Therefore, the injection molding material can flow through the main runner 421 and the branch runner 423 to the gap between the outer surface of the injection mold 40 and the surface of the shell 90 facing the accommodating space 10, so that the injection molding material can fill the gap efficiently and evenly, which to a certain extent makes the thickness of the insulation layer 12 uniform, and to a certain extent ensures the stability of the insulation performance, avoiding weak points in insulation caused by the thinness of the insulation layer 12 in some areas.

[0128] According to some embodiments of this application, optionally, the main channel 421 includes a first flow channel 4216 and a second flow channel 4218. The injection mold 30 has an injection outlet on its surface facing the fixed space 36. The injection outlet is aligned and connected to the first flow channel 4216. The first flow channel 4216 and the second flow channel 4218 are connected sequentially in a direction away from the injection outlet. The inner diameter of the first flow channel 4216 is larger than the inner diameter of the second flow channel 4218.

[0129] Specifically, please combine Figure 8In the injection mold 40, the main runner 421 includes a first runner 4216 and a second runner 4218, with the first runner 4216 located above the second runner 4218. The injection mold 30 has an injection outlet on its surface facing the fixed space 36. The injection outlet is connected to the inlet of the injection runner 42, i.e., to the inlet 4212 of the main runner 421, and then sequentially connects to the first runner 4216 and the second runner 4218. The conveyor transports the injection material through the pipe 70, the injection outlet, and the inlet 4212 of the main runner 421, sequentially entering the first runner 4216 and the second runner 4218, then flowing to each branch runner 423 and finally injecting it into the gaps through the outlet 4234 of the branch runner 423, where it solidifies to form a relatively uniform insulating layer 12.

[0130] The first runner 4216 is the starting part of the main runner 421 and is directly connected to the injection outlet. The first runner 4216 has a relatively large inner diameter, the main purpose of which is to reduce the flow resistance of the injection material when entering the injection mold 40, prevent the injection material from clogging the injection outlet, and allow the injection material to flow at a relatively fast speed. The larger inner diameter helps to prevent the injection material from cooling and solidifying prematurely during the flow process, and to a certain extent ensures that the injection material can smoothly enter the subsequent parts of the injection mold 40.

[0131] After flowing through the first runner 4216, the injection molding material enters the second runner 4218. Upon entering the second runner 4218, the material also enters the branch runner 423, which connects to the first runner 4216. The inner diameter of the second runner 4218 is smaller than that of the first runner 4216. This is to guide the injection molding material from the first runner 4216 to the branch runner 423. The smaller inner diameter helps control the flow speed and direction of the injection molding material, ensuring that the material is evenly distributed into each branch runner 423 before being injected into the gap.

[0132] The inner diameter of the first flow channel 4216 is larger than the inner diameter of the second flow channel 4218. The inner diameters of the first flow channel 4216 and the second flow channel 4218 can be specifically limited according to actual conditions, and this application does not make specific limitations in this regard.

[0133] Therefore, by making the inner diameter of the first flow channel 4216 larger than the inner diameter of the second flow channel 4218, the injection molding material can be prevented from blocking the injection outlet to a certain extent. At the same time, the flow speed and direction of the injection molding material can be effectively controlled, thereby optimizing the flow characteristics of the injection molding material in the injection mold 40 and improving the efficiency of injection molding to a certain extent.

[0134] According to some embodiments of this application, optionally, the injection mold 30 includes a first mold 32 and a second mold 34, the first mold 32 and the second mold 34 are detachably connected, and the first mold 32 and the second mold 34 together form a fixed space 36.

[0135] Specifically, please combine Figure 5 The first mold 32 is located above the second mold 34. The first mold 32 and the second mold 34 are detachably connected, so that the first mold 32 and the second mold 34 can be easily separated when the mold is opened, which facilitates the removal of the housing 90 and the maintenance of the injection mold 30.

[0136] The first mold 32 and the second mold 34 fit together to form a fixed space 36. The shell 90 can be fixedly installed in the fixed space 36, so that the shell 90 will not easily shake or move during the injection molding process, thus affecting the quality of the injection molding.

[0137] Therefore, the fixed space 36 formed by the first mold 32 and the second mold 34 can prevent the shell 90 from shaking or moving unnecessarily during the injection molding process, which would affect the quality of the final injection molding and, to a certain extent, ensure that the injection material can solidify in the predetermined shape after injection.

[0138] According to some embodiments of this application, optionally, the injection molding machine 200 includes a cooling pipe 60, and the injection mold 30 is provided with a cooling channel. The cooling pipe 60 is connected to the injection mold 30 and communicates with the cooling channel.

[0139] Specifically, please combine Figures 3 to 5 The cooling pipe 60 includes an inlet pipe 62 and an outlet pipe 64. Both the first mold 32 and the second mold 34 are connected to the inlet pipe 62 and the outlet pipe 64. The inlet pipe 62 and the outlet pipe 64 can be connected to a liquid cooling unit. Low-temperature water flowing out of the liquid cooling unit can enter the cooling channel through the inlet pipe 62 to control the temperature of the injection molding process. The cooled water (high-temperature water) can flow out through the outlet pipe 64 and enter the liquid cooling unit, where the liquid cooling components cool the high-temperature water to form low-temperature water. The low-temperature water is then circulated back into the inlet pipe 62, thus circulating to cool the injection mold 30.

[0140] The cooling pipe 60 allows for efficient flow of cooling water to quickly absorb heat from the injection mold 30. The injection mold 30 has cooling channels that guide the cooling water through it. These channels surround a fixed space 36 within the injection mold 30, ensuring the cooling water absorbs heat from the mold 30 evenly and maintains the temperature within the fixed space 36 within a specific range. The cooling pipe 60 connects to the injection mold 30 and the cooling channels. Cooling water enters the cooling channels through the inlet pipe 62 and exits through the outlet pipe 64.

[0141] In one embodiment, the curing process of the insulating layer 12 of the housing 90 takes place within a fixed space 36, so the temperature within the cooling channel can be controlled within the range of 59°C to 65°C. Within this temperature range, the injection molding material exhibits good fluidity, which helps it to uniformly fill the gaps. If the temperature is too low, the injection molding material may become too viscous, resulting in poor flow and insufficient gap filling, affecting the molding quality of the insulating layer 12. If the temperature is too high, defects may appear in the insulating layer 12, and the curing speed will be too slow, affecting production efficiency. A temperature sensor is installed within the cooling channel, and the controller is electrically connected to the temperature sensor. The temperature sensor detects the temperature within the cooling channel. If the temperature is within the range of 59°C to 65°C, the controller controls the valve 80 to open, allowing the injection molding material to flow into the injection channel 42. If the temperature is outside the range of 59°C to 65°C, the controller controls the valve 80 to close and issues an alarm signal to stop operation.

[0142] The temperature T2 within the cooling channel is 59℃~65℃, that is, 59℃≤T1≤65℃. In one example, the temperature T2 of the injection molding material can be 59℃, 60℃, 61℃, 62℃, 63℃, 64℃, 65℃, or other values ​​greater than or equal to 59℃ and less than or equal to 65℃.

[0143] The number of inlet pipes 62 and outlet pipes 64 can be specifically limited according to actual conditions, and this application does not make a specific limitation. In one example, there are two inlet pipes 62 and two outlet pipes 64. One inlet pipe 62 and one outlet pipe 64 are connected to the first mold 32, and one inlet pipe 62 and one outlet pipe 64 are connected to the second mold 34.

[0144] Therefore, the cooling water can cool the injection mold 30 through the cooling pipe 60, so that the fixed space 36 can maintain a certain temperature during the injection process, thereby improving the injection efficiency to a certain extent.

[0145] According to some embodiments of this application, the inner injection mold 40 is optionally fixedly connected to the injection mold 30.

[0146] Specifically, please combine Figure 3 The injection mold 40 is fixedly connected to the first mold 32. The surface of the first mold 32 facing the fixed space 36 is provided with an injection outlet. The upper surface of the injection mold 40 is provided with an inlet of the injection flow channel 42. The injection outlet is aligned and connected with the inlet of the injection flow channel 42. The injection mold 40 and the injection mold 30 can be fixedly connected by means including but not limited to welding.

[0147] During assembly, the first mold 32 and the second mold 34 are separated, and the housing 90 can be placed inside the second mold 34. The first mold 32 with the injection mold 40 can be assembled with the second mold 34, and the housing 90 is fixedly installed in the fixed space 36 formed by the first mold 32 and the second mold 34. The injection mold 40 is located in the receiving space 10 of the housing 90, so that the gap between the second surface 46 and the circumferential surface 48 of the injection mold 40 and the surface of the housing 90 facing the receiving space 10 maintains a certain width. The injection material can be injected and fill the gap, so that a relatively uniform insulating layer 12 is formed on the surface of the housing 90 facing the receiving space 10.

[0148] A position sensor is installed inside the injection mold 30, and the controller is electrically connected to the position sensor. The position sensor detects the position of the injection inner mold 40 within the housing 90, and then transmits the position information to the controller. The controller controls the first mold 32 to move so that the gap between the second surface 46 and the circumferential surface 48 of the injection inner mold 40 and the surface of the housing 90 facing the accommodating space 10 maintains the desired width.

[0149] Thus, the injection mold 40 can be accurately positioned within the receiving space 10 of the housing 90, such that the gap between the inner mold 40 and the surface of the housing 90 facing the receiving space 10 remains at the desired width.

[0150] According to some embodiments of this application, optionally, one of the injection mold 40 and the injection mold 30 is provided with a positioning hole 38, and the other is provided with a positioning post. The positioning post is embedded in the positioning hole 38 to position the relative position of the injection mold 40 and the injection mold 30.

[0151] Specifically, in one embodiment, the injection mold 40 is provided with a positioning hole 38, which can be located on the first surface 44. The first mold 32 of the injection mold 30 has a positioning post on its surface facing the fixed space 36. The positioning post is embedded in the positioning hole 38 to position the relative position of the injection mold 40 and the injection mold 32. Fasteners can pass through the first mold 32 and the positioning post from above and connect to the positioning hole 38, thereby fixing the injection mold 40 and the first mold 32 together. Previously, the injection mold 40 and the first mold 32 can be welded to further improve the sealing of the connection between them. Fasteners include, but are not limited to, bolts, pins, etc.

[0152] In one embodiment, the first mold 32 of the injection mold 30 has a positioning hole 38 on its surface facing the fixed space 36, and the first surface 44 of the injection inner mold 40 has a positioning post.

[0153] The number of positioning holes 38 and positioning pins can be specifically limited according to actual conditions, and this application does not make a specific limitation. In one example, there are four positioning holes 38 and four positioning pins, with one positioning pin corresponding to one positioning hole 38.

[0154] Therefore, the cooperation between the positioning hole 38 and the positioning post ensures a relatively accurate relative position between the injection inner mold 40 and the injection mold 30 to a certain extent, thereby preventing the injection inner mold 40 and the injection mold 30 from moving or shifting when they are fixed, thus affecting the alignment and sealing of the flow channel.

[0155] Optionally, please combine Figure 11 , Figure 11 The working process of the injection molding machine 200 of this application is described.

[0156] According to some embodiments of this application, this application also provides a battery cell 100, including a housing 98 and an electrode assembly 96. An accommodating space 10 is formed in the housing 98, and the electrode assembly 96 is disposed in the accommodating space 10. An insulating layer 12 is provided on the surface of the housing 98 facing the accommodating space 10. The insulating layer 12 separates the electrode assembly 96 and the housing 98. The insulating layer 12 is formed by the injection molding machine 200 described in any of the above embodiments.

[0157] According to some embodiments of this application, optionally, the housing 98 includes a housing 90 and an end cap 92. An accommodating space 10 is formed inside the housing 90. One side of the housing 90 has an opening communicating with the accommodating space 90. The end cap 92 is disposed at the opening. An insulating layer 12 is provided on the surface of the housing 90 facing the accommodating space 10.

[0158] Please combine Figure 12 and Figure 13 The housing 90 has an accommodating space 10 for accommodating the electrode assembly 96. One side of the housing 90 has an opening communicating with the accommodating space 90. An end cap 92 is provided at the opening and closes the housing 90, so that the electrode assembly 96 operates within the closed accommodating space 10, thereby maintaining the safety of the electrode assembly 96 and the integrity of the battery cell 100 to a certain extent.

[0159] The end cap 92 is provided with electrode terminals 92a, which are interfaces for connecting the battery cell 100 to external circuits, enabling the battery cell 100 to be correctly connected to external devices. The end cap 92 is also provided with a pressure relief mechanism 92b, used to release pressure when the internal pressure of the battery cell 100 is too high, preventing the battery cell 100 from overheating or exploding. The electrode assembly 96 is provided with tabs 96a, which are connected to the electrode terminals 92a on the end cap 92. Electrical energy can be transferred from inside the electrode assembly 96 to the external circuit through the tabs 96a and the electrode terminals 92a.

[0160] An insulating layer 12 is provided on the surface of the housing 90 facing the accommodating space 10. The insulating layer 12 separates the electrode assembly 96 and the housing 90, so that the electrode assembly 96 and the housing 90 will not have direct electrical contact.

[0161] Therefore, the insulating layer 12 between the housing 90 and the electrode assembly can prevent short circuits between the housing 90 and the electrode assembly 96, thereby improving the safety of the battery cell 100 to a certain extent.

[0162] According to some embodiments of this application, this application also provides a battery device 300, including a battery cell as described in any of the above embodiments.

[0163] According to some embodiments of this application, this application also provides an electrical device, including a battery cell 100 as described in any of the above embodiments, and the battery cell 100 is used to provide electrical energy, or a battery device 300 as described in any of the above embodiments, and the battery device 300 is used to provide electrical energy.

[0164] The electrical device can be any of the aforementioned battery-powered devices or systems.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An injection molding machine, characterized in that, It includes a power mechanism, an injection mold, and an inner injection mold. The injection mold has a fixed space for mounting the housing, and the inner injection mold is used to place a receiving space within the housing and forms a gap between it and the surface of the housing facing the receiving space. The injection mold is provided with an injection flow channel. The power mechanism is connected to the injection mold and the inlet of the injection flow channel through a pipe. The outlet of the injection flow channel is connected to the gap. The power mechanism is used to flow injection molding material into the gap through the injection channel, thereby forming an insulating layer on the surface of the housing facing the accommodating space.

2. The injection molding machine according to claim 1, characterized in that, The width of the gap is 130 ± 30 micrometers.

3. The injection molding machine according to claim 1, characterized in that, The power mechanism includes a power component and a conveying component. The conveying component is used to convey the injection molding material into the injection molding channel. The power component is connected to the conveying component and is used to drive the conveying component to convey the injection molding material into the injection molding channel.

4. The injection molding machine according to claim 3, characterized in that, The power component includes an air compressor, and the conveying component includes a screw pump. The air compressor is connected to the screw pump through an air compressor pipeline.

5. The injection molding machine according to claim 3, characterized in that, The injection molding machine includes a feeding component, which is located on the pipeline between the conveying component and the injection mold, and the feeding component has a feeding port.

6. The injection molding machine according to claim 1, characterized in that, The injection mold includes a first surface, a second surface, and a circumferential surface. The first surface and the second surface are arranged opposite to each other along a first direction, and the circumferential surface is arranged around the first direction. The inlet of the injection channel is located on the first surface, and the outlet of the injection channel is located on the second surface and the circumferential surface.

7. The injection molding machine according to claim 6, characterized in that, The injection molding runner includes a main runner and multiple branch runners. The inlet of the main runner serves as the inlet of the injection molding runner, the outlet of the main runner is connected to the inlet of the branch runner, and the outlet of the branch runner serves as the outlet of the injection molding runner.

8. The injection molding machine according to claim 7, characterized in that, The main flow channel includes a first flow channel and a second flow channel. The injection mold has an injection outlet on its surface facing the fixed space. The injection outlet is aligned and connected to the first flow channel. The first flow channel and the second flow channel are connected sequentially in a direction away from the injection outlet. The inner diameter of the first flow channel is larger than the inner diameter of the second flow channel.

9. The injection molding machine according to claim 1, characterized in that, The injection mold includes a first mold and a second mold, the first mold and the second mold are detachably connected, and the first mold and the second mold together form the fixed space.

10. The injection molding machine according to claim 1, characterized in that, The injection molding machine includes a cooling pipe, and the injection mold has a cooling channel. The cooling pipe is connected to the injection mold and communicates with the cooling channel.

11. The injection molding machine according to claim 1, characterized in that, The inner injection mold is fixedly connected to the injection mold.

12. The injection molding machine according to claim 11, characterized in that, One of the injection mold and the injection mold is provided with a positioning hole, and the other is provided with a positioning post. The positioning post is embedded in the positioning hole to position the relative position of the injection mold and the injection mold.

13. A single battery cell, characterized in that, The device includes a housing and an electrode assembly. The housing has an accommodating space, the electrode assembly is disposed in the accommodating space, and an insulating layer is provided on the surface of the housing facing the accommodating space. The insulating layer separates the electrode assembly from the housing. The insulating layer is formed by an injection molding machine according to any one of claims 1-10.

14. The battery cell according to claim 13, characterized in that, The housing includes a shell and an end cap. The housing has the accommodating space formed inside it. One side of the shell has an opening communicating with the accommodating space. The end cap is disposed at the opening. The insulating layer is provided on the surface of the shell facing the accommodating space.

15. A battery device, characterized in that, Includes the battery cell described in claim 13 or 14.

16. An electrical appliance, characterized in that, Includes the battery cell of claim 13 or 14, the battery cell being used to provide electrical energy, or the battery device of claim 15, the battery device being used to provide electrical energy.

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