Battery cell, battery, electric device, method and apparatus for manufacturing battery cell

Abstract

The application relates to the battery technical field and provides a battery monomer, a battery, a power utilization device, a battery monomer manufacturing method and equipment. The battery monomer comprises a shell, a positive electrode shell, a negative electrode shell and an insulating connecting piece, the insulating connecting piece is arranged between the positive electrode shell and the negative electrode shell, is used for connecting the positive electrode shell and the negative electrode shell, and insulates and separates the positive electrode shell and the negative electrode shell; a positive electrode material layer is arranged in the shell and is electrically connected with the positive electrode shell; a negative electrode material layer is arranged in the shell and is electrically connected with the negative electrode shell; and a separator is arranged in the shell and is used for separating the positive electrode material layer and the negative electrode material layer. Through the technical scheme, the production process of the battery monomer can be simplified, and the energy density of the battery monomer is improved.

Description

[0001] This application is a divisional application based on the invention with application number 202111437751.6, application date November 30, 2021, applicant Jiangsu Times New Energy Technology Co., Ltd., and invention title "Battery cell, battery, power device, method and equipment for manufacturing battery cell". Technical Field

[0002] This application relates to the field of battery technology, and more specifically, to a battery cell, a battery, an electrical device, a method for manufacturing the battery cell, and equipment. Background Technology

[0003] In related technologies, in order to realize the charging and discharging process of power batteries, tabs and current collectors are generally set inside the casing of the battery cell, and the tabs and current collectors inside the casing are connected to the end of the electrode terminal located inside the casing to form a current loop. The setting of tabs and current collectors will occupy the internal space of the casing and affect the energy density of the battery cell. Summary of the Invention

[0004] The purpose of this application is to provide a battery cell, a battery, an electrical device, a method and equipment for manufacturing a battery cell, so as to improve the energy density of the battery cell.

[0005] In a first aspect, embodiments of this application provide a battery cell, comprising: a casing, including a positive electrode casing, a negative electrode casing, and an insulating connector, wherein the insulating connector is disposed between the positive electrode casing and the negative electrode casing for connecting the positive electrode casing and the negative electrode casing and insulatingly isolating the positive electrode casing and the negative electrode casing; a positive electrode material layer disposed within the casing and electrically connected to the positive electrode casing; a negative electrode material layer disposed within the casing and electrically connected to the negative electrode casing; and an insulating member disposed within the casing for isolating the positive electrode material layer and the negative electrode material layer.

[0006] In the technical solution of this application embodiment, the outer casing of the battery cell includes a positive electrode casing, a negative electrode casing, and an insulating connector. By placing the insulating connector between the positive electrode casing and the negative electrode casing, it not only connects the positive electrode casing and the negative electrode casing but also insulates and isolates them, preventing short circuits caused by contact between the positive electrode casing and the negative electrode casing. A positive electrode material layer and a negative electrode material layer are provided inside the casing. The positive electrode material layer contains positive active material, and the negative electrode material layer contains negative active material. Electrode terminals are provided on the casing. The positive electrode material layer is directly conductively connected to the positive electrode casing, and the negative electrode material layer is directly conductively connected to the negative electrode casing. This eliminates the need for current collectors and tabs in the battery cell, thereby improving the space utilization rate inside the battery cell's casing and thus contributing to increasing the energy density of the battery cell. Meanwhile, an isolation element is provided inside the casing, and the isolation element is located between the positive electrode material layer and the negative electrode material layer to isolate the positive electrode material layer and the negative electrode material layer, prevent short circuit caused by contact between the positive electrode material layer and the negative electrode material layer, and the isolation element can only allow small-volume charged ions to pass through, which facilitates the diffusion of charged ions and helps to improve the storage efficiency of the battery cell.

[0007] In some embodiments, the positive electrode housing has a first opening, the negative electrode housing has a second opening, the first opening and the second opening are disposed opposite to each other, the insulating connector is annular and disposed between the first opening and the second opening, the positive electrode material layer is disposed inside the positive electrode housing, and the negative electrode material layer is disposed inside the negative electrode housing.

[0008] In the above technical solution, the positive electrode shell and the negative electrode shell are respectively provided with a first opening and a second opening, and the first opening and the second opening are arranged opposite to each other. When assembling the shell, the positive electrode material layer is first placed inside the positive electrode shell, and the negative electrode material layer is placed inside the negative electrode shell. Then, an annular insulating connector is placed between the first opening and the second opening and connected to the positive electrode shell and the negative electrode shell respectively, thereby realizing the assembly of the shell, effectively improving the assembly efficiency of the product, and the structure and principle are relatively simple and easy to implement.

[0009] In some embodiments, the edge of the insulating member is fixedly connected to the insulating connector.

[0010] In the above technical solution, when assembling the isolator, the contour edge of the isolator can be fixedly connected to the insulating connector, thereby realizing the fixed assembly of the isolator.

[0011] In some embodiments, the battery cell further includes a first retaining ring and a second retaining ring, the first retaining ring and the second retaining ring being disposed opposite to each other within the housing and both being fixedly connected to the insulating connector, the first retaining ring and the second retaining ring being configured to jointly clamp the edge of the insulating member.

[0012] In the above technical solution, the battery cell also includes a first fixing ring and a second fixing ring. By setting the first fixing ring and the second fixing ring on both sides of the separator and clamping the edge of the separator together, the separator is fixed. Furthermore, by setting the first fixing ring and the second fixing ring inside the housing and fixing them to the insulating connector, the separator can be fixedly assembled, ensuring the stability and reliability of the separator fixation.

[0013] In some embodiments, a first limiting groove is provided on the inner circumferential surface of the insulating connector, and a first limiting protrusion is provided on the outer circumferential surface of the first fixing ring and the second fixing ring. The first limiting protrusion is embedded in the first limiting groove to fix the first fixing ring, the second fixing ring and the insulating connector.

[0014] In the above technical solution, by providing a first limiting groove on the inner circumferential surface of the insulating connector, and providing a first limiting protrusion that matches the first limiting groove on the outer circumferential surface of both the first fixing ring and the second fixing ring, the first fixing ring and the insulating connector can be fixedly assembled by embedding the first limiting protrusion into the first limiting groove, thus effectively improving the assembly efficiency of the product.

[0015] In some embodiments, the first fixing ring and the second fixing ring are respectively provided with a second limiting protrusion and a second limiting groove, at least a portion of the isolation member is accommodated in the second limiting groove, and the second limiting protrusion is embedded in the second limiting groove to fix the isolation member.

[0016] In the above technical solution, the first fixing ring and the second fixing ring are respectively provided with a second limiting protrusion and a second limiting groove. That is, the first fixing ring is provided with a second limiting protrusion on the side facing the second fixing ring, and the second fixing ring is provided with a second limiting groove on the side facing the first fixing ring, or the first fixing ring is provided with a second limiting groove on the side facing the second fixing ring, and the second fixing ring is provided with a second limiting protrusion on the side facing the first fixing ring. By accommodating at least a portion of the isolation member in the second limiting groove and embedding the second limiting protrusion in the second limiting groove, reliable fixation of the isolation member can be achieved.

[0017] In some embodiments, the insulating connector includes a positive electrode connection portion, a negative electrode connection portion, and an insulating portion. The positive electrode connection portion is used to connect to the positive electrode housing, the negative electrode connection portion is used to weld to the negative electrode housing, and the insulating portion is used to insulate the positive electrode connection portion and the negative electrode connection portion.

[0018] In the above technical solution, the insulating part of the insulating connector is located between the positive electrode connection part and the negative electrode connection part, which is used to insulate the positive electrode connection part and the negative electrode connection part from each other. The positive electrode connection part is connected to the positive electrode housing, and the negative electrode connection part is connected to the negative electrode housing, thereby realizing the assembly connection of the insulating connector with the positive electrode housing and the negative electrode housing. The specific connection method between the positive electrode connection part and the negative electrode connection part and the positive electrode housing and the negative electrode housing is not limited; it can be connected by welding, snap-fitting, or bonding, etc.

[0019] In some embodiments, the positive electrode connection portion is welded to the positive electrode housing, the negative electrode connection portion is welded to the negative electrode housing, and both the positive electrode connection portion and the negative electrode connection portion are at least partially embedded in the insulating portion.

[0020] In the above technical solution, by welding the positive electrode connection part to the positive electrode shell and the negative electrode connection part to the negative electrode shell, the welding method can effectively ensure the reliability of the connection between the insulating connection part and the positive electrode shell and the negative electrode shell. Moreover, both the positive electrode connection part and the negative electrode connection part are at least partially embedded in the insulating part, which ensures the reliability of the connection between the positive electrode connection part and the negative electrode connection part and the insulating part, thereby further ensuring the reliability of the battery cell assembly and the safety of use.

[0021] In some embodiments, the outer peripheral surface of the end of the positive electrode housing connected to the insulating connector is provided with a first reinforcing portion; and / or, the outer peripheral surface of the end of the negative electrode housing connected to the insulating connector is provided with a second reinforcing portion.

[0022] In the above technical solution, by providing a first reinforcing part on the outer periphery of the opening of the positive electrode shell, the first reinforcing part can improve the local strength at the connection between the positive electrode shell and the insulating connector. For example, when the positive electrode shell and the positive electrode connection part of the insulating connector are welded, the welding area between the two can be increased, thereby helping to improve the reliability of the connection between the positive electrode shell and the insulating connector.

[0023] By providing a second reinforcing part on the outer periphery of the opening of the negative electrode housing, the second reinforcing part can improve the local strength at the connection between the negative electrode housing and the insulating connector. For example, when the negative electrode housing and the negative electrode connection part of the insulating connector are welded, the welding area between the two can be increased, thereby helping to improve the reliability of the connection between the negative electrode housing and the insulating connector.

[0024] The first and second reinforcing parts can be structures such as reinforcing strips or reinforcing ribs.

[0025] In some embodiments, a liquid injection hole is provided on the top of the positive electrode housing, and the liquid injection hole is sealed by a screw sealing pin.

[0026] In the above technical solution, the screw sealing pin not only allows electrolyte to be injected into the casing through the injection hole when opened, but also allows for pressure relief inside the casing when opened, so as to ensure the safety of the battery cell.

[0027] In some embodiments, the battery cell further includes a strapping element for strapping the casing.

[0028] In the above technical solution, by setting a strapping component on the outer periphery of the casing, the strapping component plays a restraining role on the casing, which is used to prevent the casing from cracking due to excessive internal pressure of the battery cell, thereby further improving the safety of the battery cell.

[0029] Secondly, embodiments of this application provide a battery that includes the battery cell described in the above embodiments.

[0030] Thirdly, embodiments of this application provide an electrical device that includes the battery described in the above embodiments, the battery being used to provide electrical energy.

[0031] Fourthly, embodiments of this application provide a method for manufacturing a battery cell, comprising: providing a casing, the casing including a positive electrode casing, a negative electrode casing, and an insulating connector; providing a positive electrode material layer, a negative electrode material layer, and a separator; placing the positive electrode material layer inside the positive electrode casing, thereby electrically connecting the positive electrode material layer to the positive electrode casing; and placing the negative electrode material layer inside the negative electrode casing, thereby electrically connecting the negative electrode material layer to the negative electrode casing; placing the separator in the casing to separate the positive electrode material layer and the negative electrode material layer; placing the insulating connector between the positive electrode casing and the negative electrode casing, and connecting the insulating connector to the positive electrode casing and the negative electrode casing respectively.

[0032] This application provides a battery cell manufacturing apparatus, comprising: a first providing module for providing a housing, the housing including a positive electrode housing, a negative electrode housing, and an insulating connector; a second providing module for providing a positive electrode material layer, a negative electrode material layer, and a separator; a first assembly module for placing the positive electrode material layer inside the positive electrode housing, electrically connecting the positive electrode material layer to the positive electrode housing, and placing the negative electrode material layer inside the negative electrode housing, electrically connecting the negative electrode material layer to the negative electrode housing; the first assembly module further comprising placing the separator in the housing to separate the positive electrode material layer and the negative electrode material layer; and a second assembly module for placing the insulating connector between the positive electrode housing and the negative electrode housing, and connecting the insulating connector to the positive electrode housing and the negative electrode housing respectively.

[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] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0036] Figure 2 Exploded structural diagrams of batteries according to some embodiments of this application;

[0037] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0038] Figure 4 A three-dimensional structural schematic diagram of a battery cell provided in some embodiments of this application;

[0039] Figure 5 A top view of a single battery cell provided in some embodiments of this application;

[0040] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure along the BB direction;

[0041] Figure 7 A cross-sectional view of the isolation member, the first fixing ring, and the second fixing ring in an assembled state according to some embodiments of this application;

[0042] Figure 8 for Figure 7 Enlarged structural diagram of section A in the middle;

[0043] Figure 9 Exploded structural diagrams of insulating connectors provided in some embodiments of this application;

[0044] Figure 10 This is a schematic diagram of the assembly structure of the insulating connector provided in some embodiments of this application;

[0045] Figure 11 A schematic flowchart illustrating the manufacturing method of a battery cell provided in an embodiment of this application;

[0046] Figure 12 This is a schematic block diagram of the structure of a battery cell manufacturing equipment provided in an embodiment of this application.

[0047] The reference numerals in the detailed embodiments are as follows:

[0048] 1000 vehicles;

[0049] Battery 100, controller 200, motor 300;

[0050] Box 10, Part 11, Part 2 12;

[0051] Battery cell 20, casing 201, insulating connector 202, positive electrode material layer 203, negative electrode material layer 204, separator assembly 205, strapping component 206, buckle 207;

[0052] Positive electrode housing 2011, negative electrode housing 2012, first opening 2013, second opening 2014, first reinforcing part 2015, second reinforcing part 2016, positive electrode connecting part 2021, negative electrode connecting part 2022, insulating part 2023, first limiting groove 2024, first fixing ring 2051, second fixing ring 2052, isolator 2053, first limiting protrusion 2054, second limiting groove 2055, second limiting protrusion 2056;

[0053] The battery cell manufacturing equipment 30 includes a first supply module 301, a second supply module 302, a first assembly module 303, and a second assembly module 304. Detailed Implementation

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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).

[0060] 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.

[0061] 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.

[0062] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used 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 power battery applications, market demand is also constantly increasing.

[0063] For typical power batteries, during charging and discharging, the positive and negative active materials located inside the battery cell's casing react with the electrolyte and connect to the electrode terminals via tabs and current collectors to form a current loop. The tabs and current collectors occupy internal space within the battery cell, affecting its energy density. Furthermore, the connection between the positive and negative active materials and the tabs is not only technologically complex but also carries the risk of detachment after connection.

[0064] Based on the above considerations, and to address the low internal space utilization of battery cells caused by placing the tabs and current collectors inside the battery cell casing, as well as the safety issues during battery cell use, the inventors, after in-depth research, designed a battery cell that eliminates the tabs and current collectors within the battery cell. Instead, the casing is divided into a positive electrode casing, a negative electrode casing, and an insulating connector between the positive and negative electrode casings. A positive electrode material layer electrically connected to the positive electrode casing is located inside the positive electrode casing, and a negative electrode connector electrically connected to the negative electrode casing is located inside the negative electrode casing. Since electrode terminals are located on the casing, during battery charging and discharging, the positive and negative electrode material layers react with the electrolyte, forming a current loop through the positive and negative electrode casings and connecting to the electrode terminals. Furthermore, by eliminating the tabs and current collectors, the internal space of the battery cell can be fully utilized, thus helping to improve the energy density of the battery cell. Simultaneously, it avoids the easy detachment of the material layers after connection with the tabs, improving the safety and stability of the battery cell during use.

[0065] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power system for such an electrical device can be constructed using battery cells and batteries disclosed in this application. This simplifies the manufacturing process of the battery cells and batteries and helps to improve the energy density of the battery cells and batteries as a whole.

[0066] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0067] 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.

[0068] Please refer to Figure 1 , Figure 1 This 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 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0069] In some embodiments of this application, the battery 100 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.

[0070] To meet different electricity needs, please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space. Alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0071] In battery 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, battery 100 can also be composed of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. Battery 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0072] Here, battery cell 20 refers to the smallest unit that makes up the battery. Each battery cell 20 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. Battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0073] Please refer to some embodiments of this application. Figures 3 to 6 , Figure 3 This is an exploded structural diagram of the battery cell 20 provided in some embodiments of this application. Figure 4 This is a three-dimensional structural diagram of a battery cell according to some embodiments of this application. Figure 5 This is a top view of a single battery cell provided in some embodiments of this application. Figure 6 for Figure 5A cross-sectional view of the battery cell 20 along the BB direction. The battery cell 20 includes: a casing 201, a positive electrode material layer 203, a negative electrode material layer 204, and a separator. The casing 201 includes a positive electrode housing 2011, a negative electrode housing 2012, and an insulating connector 202. The insulating connector 202 is disposed between the positive electrode housing 2011 and the negative electrode housing 2012, connecting them and insulating them. The positive electrode material layer 203 is disposed within the casing 201 and electrically connected to the positive electrode housing 2011. The negative electrode material layer 204 is disposed within the casing 201 and electrically connected to the negative electrode housing 2012. The separator is disposed within the casing 201 to isolate the positive electrode material layer 203 and the negative electrode material layer 204.

[0074] The outer casing 201 is a component that forms the internal environment of the battery cell 20. This internal environment can accommodate the positive electrode material layer 203, the negative electrode material layer 204, the separator, the electrolyte, and other components. Specifically, the outer casing 201 includes a positive electrode housing 2011 and a negative electrode housing 2012, and an insulating connector 202 disposed between the positive electrode housing 2011 and the negative electrode housing 2012. The insulating connector 202 can be made of plastic or rubber, etc. Functional components such as electrode terminals can be provided on the outer casing 201. The electrode terminals can be electrically connected to the positive electrode material layer 203 and the negative electrode material layer 204 through the outer casing 201 for outputting or inputting electrical energy into the battery cell 20. The outer casing 201 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. The material of the outer casing 201 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and this embodiment does not impose any special limitations on these materials.

[0075] The positive electrode material layer 203 and the negative electrode material layer 204 are components in the battery cell 20 where electrochemical reactions occur. The positive electrode material layer 203 comprises one or more positive electrode active materials and a conductive agent, and may or may not contain an electrolyte. The negative electrode material layer 204 comprises one or more electrode active materials, and may or may not contain a conductive agent and an electrolyte. The positive electrode material layer 203 is electrically connected to the positive electrode housing 2011, and the negative electrode material layer 204 is electrically connected to the negative electrode housing 2012. A separator is disposed between the positive electrode material layer 203 and the negative electrode material layer 204. For example, the positive electrode material layer 203 is attached to the inside of the positive electrode housing 2011, and the negative electrode material layer 204 is attached to the inside of the negative electrode housing 2012. During the charging and discharging process of the battery, the positive electrode material layer 203 and the negative electrode material layer 204 react with the electrolyte and connect to the electrode terminals through the positive electrode housing 2011 and the negative electrode housing 2012, respectively, to form a current loop.

[0076] By placing the insulating connector 202 between the positive electrode housing 2011 and the negative electrode housing 2012, the insulating connector 202 not only connects the positive electrode housing 2011 and the negative electrode housing 2012, but also insulates and isolates them, preventing short circuits caused by contact between the positive electrode housing 2011 and the negative electrode housing 2012. Furthermore, by placing the positive electrode material layer 203 and the negative electrode material layer 204 inside the outer casing 201, where the positive electrode material layer 203 contains positive active material and the negative electrode material layer 204 contains negative active material, and electrode terminals are provided on the outer casing 201, the positive electrode material layer 203 is directly electrically connected to the positive electrode housing 2011, and the negative electrode material layer 204 is directly electrically connected to the negative electrode housing 2012, thereby achieving electrical connection with the electrode terminals. This eliminates the current collector and tabs inside the battery cell 20, improving the space utilization rate inside the outer casing 201 of the battery cell 20, thus contributing to increasing the energy density of the battery cell 20. Meanwhile, an isolation element is provided inside the outer casing 201, and the isolation element is located between the positive electrode material layer 203 and the negative electrode material layer 204 to isolate the positive electrode material layer 203 and the negative electrode material layer 204, prevent the positive electrode material layer 203 and the negative electrode material layer 204 from contacting each other and causing a short circuit. In addition, the isolation element can only allow small-volume charged ions to pass through, which facilitates the diffusion of charged ions and helps to improve the storage efficiency of the battery cell 20.

[0077] Please refer to Figure 1 According to some embodiments of this application, the positive electrode housing 2011 has a first opening 2013, the negative electrode housing 2012 has a second opening 2014, the first opening 2013 and the second opening 2014 are disposed opposite to each other, the insulating connector 202 is annular and disposed between the first opening 2013 and the second opening 2014, the positive electrode material layer 203 is disposed inside the positive electrode housing 2011, and the negative electrode material layer 204 is disposed inside the negative electrode housing 2012.

[0078] The first opening 2013 is an installation port on the side of the positive electrode housing 2011 facing the negative electrode housing 2012. The positive electrode housing 2011 has an installation cavity, and the positive electrode material layer 203 is installed inside the positive electrode housing 2011 through the first opening 2013. The second opening 2014 is an installation port on the side of the negative electrode housing 2012 facing the positive electrode housing 2011. The negative electrode housing 2012 also has an installation cavity, and the negative electrode material layer 204 is installed inside the negative electrode housing 2012 through the second opening 2014.

[0079] The positive electrode housing 2011 and the negative electrode housing 2012 are respectively provided with a first opening 2013 and a second opening 2014, and the first opening 2013 and the second opening 2014 are arranged opposite to each other. When assembling the housing 201, the positive electrode material layer 203 is first placed in the positive electrode housing 2011 and the negative electrode material layer 204 is placed in the negative electrode housing 2012. Then, the annular insulating connector 202 is placed between the first opening 2013 and the second opening 2014 and connected to the positive electrode housing 2011 and the negative electrode housing 2012 respectively, thereby realizing the assembly of the housing 201. This effectively improves the assembly efficiency of the product, and the structure and principle are relatively simple and easy to implement.

[0080] According to some embodiments of this application, the edge of the isolation member is fixedly connected to the insulating connector 202.

[0081] For example, the separator is a structural component such as a diaphragm. The separator is used to insulate the positive electrode material layer 203 and the negative electrode material layer 204, while allowing only small-volume charged ions to pass through, which facilitates the diffusion of charged ions.

[0082] When assembling the isolator, the outline edge of the isolator can be fixedly connected to the insulating connector 202, thereby achieving the fixed assembly of the isolator.

[0083] Please refer to Figure 7 , Figure 7 This is a cross-sectional view of the separator and the first and second fixing rings in an assembled state according to some embodiments of this application. According to some embodiments of this application, the battery cell 20 further includes a first fixing ring 2051 and a second fixing ring 2052, which are disposed opposite to each other within the housing 201 and are both fixedly connected to the insulating connector 202. The first fixing ring 2051 and the second fixing ring 2052 are configured to jointly clamp the edge of the separator.

[0084] The first fixing ring 2051 and the second fixing ring 2052 serve as the mounting carriers for the isolator. Since the isolator is a thin film structure, its connection with the insulating connector 202 is unreliable when directly fixed. Therefore, the first fixing ring 2051 and the second fixing ring 2052 are set as the fixing carriers for fixing the isolator. After the edge of the isolator is clamped by the first fixing ring 2051 and the second fixing ring 2052, the first fixing ring 2051 and the second fixing ring 2052 are then connected to the insulating connector 202, which can ensure that the isolator 2053 is fixed more reliably.

[0085] By placing the first fixing ring 2051 and the second fixing ring 2052 on both sides of the isolator and clamping the edge of the isolator together, the isolator is fixed. Furthermore, by placing the first fixing ring 2051 and the second fixing ring 2052 inside the housing 201 and fixing them to the insulating connector 202, the isolator can be fixedly assembled, ensuring the stability and reliability of the isolator.

[0086] Please refer to Figure 8 and Figure 9 , Figure 8 for Figure 7 Enlarged structural diagram of section A in the middle. Figure 9 This is an exploded structural diagram of an insulating connector provided in some embodiments of this application. According to some embodiments of this application, a first limiting groove 2024 is provided on the inner circumferential surface of the insulating connector 202, and a first limiting protrusion 2054 is provided on the outer circumferential surface of the first fixing ring 2051 and the second fixing ring 2052. The first limiting protrusion 2054 is embedded in the first limiting groove 2024 to fix the first fixing ring 2051, the second fixing ring 2052 and the insulating connector 202.

[0087] The first limiting groove 2024 can be partially set on the inner circumferential surface of the insulating connector 202, or it can be set along the entire inner circumferential surface of the insulating connector 202. Correspondingly, the first limiting protrusion 2054 can be a structure that protrudes partially on the outer circumferential surface of the first fixing ring 2051 and the second fixing ring 2052, or it can be a structure that protrudes along the entire outer circumferential surface of the first fixing ring 2051 and the second fixing ring 2052, as long as it is compatible with the first limiting groove 2024.

[0088] By providing a first limiting groove 2024 on the inner circumferential surface of the insulating connector 202, and providing a first limiting protrusion 2054 that matches the first limiting groove 2024 on the outer circumferential surface of the first fixing ring 2051 and the second fixing ring 2052, the first fixing ring 2051 and the second fixing ring 2052 can be fixedly assembled with the insulating connector 202 by embedding the first limiting protrusion 2054 into the first limiting groove 2024, which effectively improves the assembly efficiency of the product.

[0089] Please refer to Figure 8 According to some embodiments of this application, the first fixing ring 2051 and the second fixing ring 2052 are respectively provided with a second limiting protrusion 2056 and a second limiting groove 2055. At least a portion of the isolation member is accommodated in the second limiting groove 2055, and the second limiting protrusion 2056 is embedded in the second limiting groove 2055 to fix the isolation member.

[0090] The positions of the second limiting protrusion 2056 and the second limiting groove 2055 are not limited. For example, the second limiting protrusion 2056 is located on the side of the first fixing ring 2051 facing the second fixing ring 2052, and the second limiting groove 2055 is located on the side of the second fixing ring 2052 facing the first fixing ring 2051; or, the second limiting protrusion 2056 is located on the side of the second fixing ring 2052 facing the first fixing ring 2051, and the second limiting groove 2055 is located on the side of the first fixing ring 2051 facing the second fixing ring 2052. Specifically, the second limiting protrusion 2056 can be circumferentially spaced along the side of the first fixing ring 2051 facing the second fixing ring 2052, or it can be circumferentially arranged around the side of the first fixing ring 2051 facing the second fixing ring 2052; correspondingly, the second limiting groove 2055 can be circumferentially spaced along the side of the second fixing ring 2052 facing the first fixing ring 2051, or it can be circumferentially arranged around the side of the second fixing ring 2052 facing the first fixing ring 2051.

[0091] The first fixing ring 2051 and the second fixing ring 2052 are respectively provided with a second limiting protrusion 2056 and a second limiting groove 2055. That is, the first fixing ring 2051 is provided with a second limiting protrusion 2056 on the side facing the second fixing ring 2052, and the second fixing ring 2052 is provided with a second limiting groove 2055 on the side facing the first fixing ring 2051. Alternatively, the first fixing ring 2051 is provided with a second limiting groove 2055 on the side facing the second fixing ring 2052, and the second fixing ring 2052 is provided with a second limiting protrusion 2056 on the side facing the first fixing ring 2051. By accommodating at least a portion of the isolation member in the second limiting groove 2055 and embedding the second limiting protrusion 2056 in the second limiting groove 2055, reliable fixation of the isolation member can be achieved.

[0092] Please refer to Figure 9 and Figure 10 , Figure 10 This is a schematic diagram of the assembly structure of an insulating connector provided in some embodiments of this application. According to some embodiments of this application, the insulating connector 202 includes a positive electrode connection portion 2021, a negative electrode connection portion 2022, and an insulating portion 2023. The positive electrode connection portion 2021 is used to connect to the positive electrode housing 2011, the negative electrode connection portion 2022 is used to weld to the negative electrode housing 2012, and the insulating portion 2023 is used to insulatingly connect the positive electrode connection portion 2021 and the negative electrode connection portion 2022.

[0093] The specific connection method between the positive electrode connection part 2021 and the positive electrode housing 2011, and between the negative electrode connection part 2022 and the negative electrode housing 2012, is not limited and can be achieved by welding, snap-fitting, or bonding. It is understood that the positive electrode connection part 2021 and the negative electrode connection part 2022 can also be welded to, snap-fitted to, or integrally formed with the insulating part 2023. For example, the positive electrode connection part 2021 and the negative electrode connection part 2022 are respectively a positive electrode connecting ring and a negative electrode connecting ring, and the insulating part 2023 is an insulating ring formed by injection molding of the positive electrode connecting ring and the negative electrode connecting ring. Grooves are spaced apart on the inner circumferential surface of the insulating ring, and the positive electrode connecting ring and the negative electrode connecting ring are respectively embedded in the corresponding grooves and connected to the positive electrode housing 2011 and the negative electrode housing 2012.

[0094] The insulating part 2023 of the insulating connector 202 is disposed between the positive electrode connection part 2021 and the negative electrode connection part 2022, and is used to make the positive electrode connection part 2021 and the negative electrode connection part 2022 insulatedly connected. The positive electrode connection part 2021 is connected to the positive electrode housing 2011, and the negative electrode connection part 2022 is connected to the negative electrode housing 2012, thereby realizing the quick assembly connection of the insulating connector 202 with the positive electrode housing 2011 and the negative electrode housing 2012.

[0095] According to some embodiments of this application, the positive electrode connection portion 2021 is welded to the positive electrode housing 2011, the negative electrode connection portion 2022 is welded to the negative electrode housing 2012, and both the positive electrode connection portion 2021 and the negative electrode connection portion 2022 are at least partially embedded in the insulating portion 2023.

[0096] For example, the positive electrode connection portion 2021 is a positive electrode welding ring, the negative electrode connection portion 2022 is a negative electrode welding ring, and the insulating portion 2023 is a groove formed by the insulating connector 202. After the positive electrode welding component and the negative electrode welding component are welded to the positive electrode housing 2011 and the negative electrode housing 2012 respectively, they are embedded in the groove of the insulating portion 2023.

[0097] By welding the positive electrode connection 2021 to the positive electrode housing 2011 and the negative electrode connection 2022 to the negative electrode housing 2012, the welding method can effectively ensure the reliability of the connection between the insulating connector 202 and the positive electrode housing 2011 and the negative electrode housing 2012. Furthermore, both the positive electrode connection 2021 and the negative electrode connection 2022 are at least partially embedded in the insulating part 2023, which ensures the reliability of the connection between the positive electrode connection 2021 and the negative electrode connection 2022 and the insulating part 2023, thereby further ensuring the reliability of the battery cell 20 assembly and the safety of its use.

[0098] Please refer to Figure 4According to some embodiments of this application, the outer peripheral surface of the end of the positive electrode housing 2011 connected to the insulating connector 202 is provided with a first reinforcing part 2015; the outer peripheral surface of the end of the negative electrode housing 2012 connected to the insulating connector 202 is provided with a second reinforcing part 2016.

[0099] The first reinforcing part 2015 and the second reinforcing part 2016 can be structures such as reinforcing strips or reinforcing ribs provided on the outer periphery of the openings of the positive electrode shell 2011 and the negative electrode shell 2012.

[0100] By providing a first reinforcing part 2015 on the outer periphery of the opening of the positive electrode housing 2011, the first reinforcing part can improve the local strength of the connection between the positive electrode housing 2011 and the insulating connector 202. For example, when the positive electrode housing 2011 and the positive electrode connection part 2021 of the insulating connector 202 are welded, the welding area between the two can be increased, thereby helping to improve the reliability of the connection between the positive electrode housing 2011 and the insulating connector 202.

[0101] By providing a second reinforcing part 2016 on the outer periphery of the opening of the negative electrode housing 2012, the second reinforcing part 2016 can improve the local strength of the connection between the negative electrode housing 2012 and the insulating connector 202. For example, when the negative electrode housing 2012 and the negative electrode connection part 2022 of the insulating connector 202 are welded, the welding area between the two can be increased, thereby helping to improve the reliability of the connection between the negative electrode housing 2012 and the insulating connector 202.

[0102] According to some embodiments of this application, the top of the positive electrode housing 2011 is provided with a liquid injection hole, which is sealed by a screw sealing pin.

[0103] The screw seal not only allows electrolyte to be injected into the housing 201 through the injection hole when opened, but also allows for pressure relief inside the housing 201 when opened, so as to ensure the safety of the battery cell 20.

[0104] Please refer to Figure 4 According to some embodiments of this application, the battery cell 20 further includes a strapping member 206 for strapping the outer casing 201.

[0105] Because the positive electrode material layer and the negative electrode material layer 204 produce gas through an electrochemical reaction inside the casing 201, the gas can be released by tightening the screw sealing pin and opening the liquid injection hole. However, in order to ensure the safety of the battery cell 20 and the battery during use, a strapping member 206 is specially provided on the outside of the casing 201. For example, the strapping member 206 is a structure such as a hoop or binding strap.

[0106] By providing a strapping member 206 around the outer periphery of the outer casing 201, the strapping member 206 restrains the outer casing 201, preventing excessive internal pressure in the battery cell 20 from causing the outer casing 201 to crack, thus further improving the safety of the battery cell 20 in use. Specifically, a buckle 207 is provided on the periphery of the outer casing 201, and a slot is provided on the side of the strapping member 206 facing the outer casing 201. The buckle 207 is inserted into the slot, so that the strapping member 206 is engaged with the outer casing 201.

[0107] According to some embodiments of this application, see Figures 3 to 10 This application provides a battery cell 20, including a casing 201, an insulating connector 202, a positive electrode material layer 203, a negative electrode material layer 204, and a separator assembly 205. The casing 201 includes a positive electrode housing 2011 and a negative electrode housing 2012. The insulating connector 202 is disposed between the positive electrode housing 2011 and the negative electrode housing 2012 to provide insulation between them. The positive electrode material layer 203 is disposed within the positive electrode housing 2011 and electrically connected to it; the negative electrode material layer 204 is disposed within the negative electrode housing 2012 and electrically connected to it. The separator assembly 205 is disposed between the positive electrode material layer 203 and the negative electrode material layer 204.

[0108] Specifically, the positive electrode housing 2011 has a first opening 2013, and the negative electrode housing 2012 has a second opening 2014. The insulating connector 202 includes a positive electrode welding ring (i.e., a positive electrode connection portion 2021), a negative electrode welding ring (i.e., a negative electrode connection portion 2022), and an insulating component (i.e., an insulating portion 2021) disposed between the positive electrode welding ring and the negative electrode welding ring. The positive electrode welding ring is welded to the positive electrode housing 2011, and the negative electrode welding ring is welded to the negative electrode housing 2012. The inner circumferential surface of the insulating component has a first limiting groove 2024, and the outer circumferential surfaces of the positive electrode welding ring and the negative electrode welding ring have a first limiting protrusion 2054. The first limiting protrusion 2054 is embedded in the first limiting groove 2024. The separator assembly 205 includes a first fixing ring 2051, a second fixing ring 2052, and a separator (i.e., separator 2053) disposed between the first fixing ring 2051 and the second fixing ring 2052. The first fixing ring 2051 has a second limiting groove 2055 on the side facing the second fixing ring 2052, and the second fixing ring 2052 has a second limiting protrusion 2056 on the side facing the first fixing ring 2051. The edge of the separator is accommodated within the second limiting groove 2055, and the second limiting protrusion 2056 is inserted into the second limiting groove 2055, thereby clamping the separator between the first fixing ring 2051 and the second fixing ring 2052. Specifically, the separator assembly 205 is also embedded within an insulating member and located between the positive electrode welding ring and the negative electrode welding ring.

[0109] According to some embodiments of this application, this application also provides a battery that includes the battery cell 20 in the above embodiments.

[0110] According to some embodiments of this application, this application also provides an electrical device that includes the battery described in the above embodiments, the battery being used to provide electrical energy.

[0111] The electrical device can be any of the aforementioned battery-powered devices or systems.

[0112] Please refer to Figure 11 , Figure 11 This is a schematic flowchart illustrating a method for manufacturing a battery cell according to an embodiment of this application. According to some embodiments of this application, this application also provides a method for manufacturing a battery cell, comprising:

[0113] Step S100: Provide a housing, which includes a positive electrode housing, a negative electrode housing, and an insulating connector.

[0114] Step S101: Provide a positive electrode material layer, a negative electrode material layer, and a separator.

[0115] Step S102: Place the positive electrode material layer inside the positive electrode housing to electrically connect the positive electrode material layer to the positive electrode housing, and place the negative electrode material layer inside the negative electrode housing to electrically connect the negative electrode material layer to the negative electrode housing.

[0116] Step S103: Place the separator in the housing to separate the positive electrode material layer and the negative electrode material layer.

[0117] Step S104: Place the insulating connector between the positive electrode housing and the negative electrode housing, and connect the insulating connector to the positive electrode housing and the negative electrode housing respectively.

[0118] Please refer to Figure 12 , Figure 12 This is a schematic block diagram of the structure of a battery cell manufacturing apparatus provided in an embodiment of this application. According to some embodiments of this application, this application also provides a battery cell manufacturing apparatus 30, comprising: a first providing module 301 for providing a housing, the housing including a positive electrode housing, a negative electrode housing, and an insulating connector; a second providing module 302 for providing a positive electrode material layer, a negative electrode material layer, and a separator; a first assembly module 303 for placing the positive electrode material layer inside the positive electrode housing, electrically connecting the positive electrode material layer to the positive electrode housing, and placing the negative electrode material layer inside the negative electrode housing, electrically connecting the negative electrode material layer to the negative electrode housing; the first assembly module 303 is also used to place the separator in the housing to separate the positive electrode material layer and the negative electrode material layer; and a second assembly module 304 for placing the insulating connector between the positive electrode housing and the negative electrode housing, and connecting the insulating connector to the positive electrode housing and the negative electrode housing respectively.

[0119] 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. A battery cell, characterized in that, include: The outer casing includes a positive electrode casing, a negative electrode casing, and an insulating connector. The outer casing is provided with electrode terminals. The insulating connector is disposed between the positive electrode casing and the negative electrode casing for connecting the positive electrode casing and the negative electrode casing and insulating and isolating the positive electrode casing and the negative electrode casing. A positive electrode material layer is attached to the inside of the positive electrode housing and is electrically connected to the positive electrode housing; A negative electrode material layer is attached to the inside of the negative electrode housing and is electrically connected to the negative electrode housing; An insulating element, disposed within the housing, is used to isolate the positive electrode material layer and the negative electrode material layer; The battery cell also includes: A first fixing ring and a second fixing ring are disposed opposite to each other inside the housing and are both fixedly connected to the insulating connector. The first fixing ring and the second fixing ring are respectively disposed on both sides of the isolator and are configured to jointly clamp the edge of the isolator. The insulating connector has a first limiting groove on its inner circumferential surface, and the first fixing ring and the second fixing ring each have a first limiting protrusion on their outer circumferential surfaces. The first limiting protrusion is embedded in the first limiting groove to fix the first fixing ring, the second fixing ring and the insulating connector.

2. The battery cell according to claim 1, characterized in that, The positive electrode housing has a first opening, and the negative electrode housing has a second opening. The first opening and the second opening are disposed opposite to each other. The insulating connector is annular and disposed between the first opening and the second opening. The positive electrode material layer is disposed inside the positive electrode housing, and the negative electrode material layer is disposed inside the negative electrode housing.

3. The battery cell according to claim 1 or 2, characterized in that, The edge of the isolator is fixedly connected to the insulating connector.

4. The battery cell according to claim 1, characterized in that, The first fixing ring and the second fixing ring are respectively provided with a second limiting protrusion and a second limiting groove. At least a portion of the isolation member is accommodated in the second limiting groove, and the second limiting protrusion is embedded in the second limiting groove to fix the isolation member.

5. The battery cell according to claim 1 or 2, characterized in that, The insulating connector includes a positive electrode connection part, a negative electrode connection part, and an insulating part. The positive electrode connection part is used to connect to the positive electrode housing, the negative electrode connection part is used to weld to the negative electrode housing, and the insulating part is used to insulate the positive electrode connection part and the negative electrode connection part.

6. The battery cell according to claim 5, characterized in that, The positive electrode connection portion is welded to the positive electrode shell, and the negative electrode connection portion is welded to the negative electrode shell. Both the positive electrode connection portion and the negative electrode connection portion are at least partially embedded in the insulating portion.

7. The battery cell according to claim 1 or 2, characterized in that, The outer peripheral surface of the end of the positive electrode housing connected to the insulating connector is provided with a first reinforcing portion; and / or The outer circumferential surface of the end of the negative electrode housing that is connected to the insulating connector is provided with a second reinforcing part.

8. The battery cell according to claim 1 or 2, characterized in that, The battery cell also includes: A strapping device for securing the outer casing.

9. A battery, characterized in that, Includes the battery cell as described in any one of claims 1 to 8.

10. An electrical device, characterized in that, Includes the battery as described in claim 9, wherein the battery is used to provide electrical energy.

11. A method for manufacturing a battery cell, used to prepare a battery cell as described in any one of claims 1 to 8, characterized in that, The method includes: A housing is provided, the housing comprising a positive electrode housing, a negative electrode housing, and an insulating connector; It provides a positive electrode material layer, a negative electrode material layer, and a separator; The positive electrode material layer is placed inside the positive electrode housing, so that the positive electrode material layer is electrically connected to the positive electrode housing; and the negative electrode material layer is placed inside the negative electrode housing, so that the negative electrode material layer is electrically connected to the negative electrode housing. The separator is placed in the housing to separate the positive electrode material layer and the negative electrode material layer; The insulating connector is placed between the positive electrode housing and the negative electrode housing, and the insulating connector is connected to the positive electrode housing and the negative electrode housing respectively.

12. A battery cell manufacturing apparatus for preparing battery cells as described in any one of claims 1 to 8, characterized in that, include: A first providing module is used to provide a housing, the housing including a positive electrode housing, a negative electrode housing, and an insulating connector; The second module is used to provide the positive electrode material layer, the negative electrode material layer, and the separator. The first assembly module is used to place the positive electrode material layer inside the positive electrode housing, so that the positive electrode material layer is electrically connected to the positive electrode housing, and to place the negative electrode material layer inside the negative electrode housing, so that the negative electrode material layer is electrically connected to the negative electrode housing. The first assembly module is also used to place the separator in the outer shell to separate the positive electrode material layer and the negative electrode material layer. The second assembly module is used to place the insulating connector between the positive electrode housing and the negative electrode housing, and to connect the insulating connector to the positive electrode housing and the negative electrode housing respectively.

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