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

Abstract

Embodiments of the present application provide a battery cell, a battery, an electric device, and a method and apparatus for manufacturing a battery cell, wherein the battery cell comprises: a housing; a first electrode assembly disposed in the housing and comprising a first main body portion and a first cathode tab and a first anode tab extending from the first main body portion; and a second electrode assembly disposed in the housing and comprising a second main body portion and a second cathode tab and a second anode tab extending from the second main body portion; wherein the first main body portion and the second main body portion are spaced apart along a first direction, and the first cathode tab and the first anode tab are disposed at one end of the first main body portion near the second main body portion along the first direction, and the second cathode tab and the second anode tab are disposed at one end of the second main body portion near the first main body portion along the first direction.

Description

Technology Field

[0001] The present application relates to the field of battery technology, and in particular, to battery cells, batteries, electric devices, methods and devices for manufacturing battery cells. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles have increasingly emerged as an important component of this sustainable development due to their energy-saving and eco-friendly advantages. In the case of electric vehicles, one of the key factors in their development is battery technology.

[0003] Heat is generated in the cells during the charging and discharging process, affecting the battery's lifespan. The problem to be solved

[0004] The present application provides a battery cell, a battery, an electric device, a method for manufacturing a battery cell, and an apparatus that can secure space for placing a cooling device and effectively lower the temperature of the battery cell. means of solving the problem

[0005] In the first aspect, the present application is,

[0006] Housing;

[0007] A first electrode assembly disposed in a housing and comprising a first main body portion and a first cathode tab and a first anode tab extending from the first main body portion; and

[0008] A second electrode assembly disposed in a housing and comprising a second main body portion and a second cathode tab and a second anode tab extending from the second main body portion; and

[0009] A battery cell is provided, wherein a first main body portion and a second main body portion are spaced apart along a first direction, a first cathode tab and a first anode tab are disposed at one end of the first main body portion near the second main body portion along the first direction, and a second cathode tab and a second anode tab are disposed at one end of the second main body portion near the first main body portion along the first direction.

[0010] In some of the above embodiments, the first main body and the second main body are arranged spaced apart along a first direction, and the first cathode tab, the first anode tab, the second cathode tab, and the second anode tab are all positioned between the first main body and the second main body, thereby securing a space for a liquid cooling system between one end of the first main body away from the second main body and the housing, and / or between one end of the second main body away from the first main body and the housing. Compared to a solution in which the first cathode tab, the first anode tab, the second cathode tab, and the second anode tab are all positioned in the space between the cell and the top of the housing, the space for the liquid cooling system can be significantly expanded, thereby effectively improving the cooling effect, preventing the temperature of the battery cell from becoming too high, and further preventing the gradual depletion of the electrolyte due to the evaporation of moisture. Furthermore, problems such as reduced charging efficiency, deformation of the electrode plates, increased internal resistance, accelerated oxidation of mechanical parts, and deterioration of the electrode plates or separator are avoided, and the service life of the battery is effectively improved.

[0011] In some embodiments, the battery cell further comprises a first connecting piece, a second connecting piece, a positive column, and a negative column, wherein the first cathode tab and the second cathode tab are both connected to the first connecting piece, the first connecting piece is connected to the positive column, the first anode tab and the second anode tab are both connected to the second connecting piece, and the second connecting piece is connected to the negative column.

[0012] In some of the above embodiments, the first cathode tab and the second cathode tab are both connected to the first connecting piece, and the first anode tab and the second anode tab are both connected to the second connecting piece. Thus, the first electrode assembly and the second electrode assembly can implement a shared connecting piece to reduce the number of parts of the battery cell and reduce costs. Additionally, the shared connecting piece can simplify the internal structural arrangement of the battery cell, save space, and reduce the volume of the battery cell.

[0013] In some embodiments, an anode pillar is installed on a first side of the housing and a cathode pillar is installed on a second side of the housing, the first side and the second side are positioned opposite each other, and both the first side and the second side are parallel to a first direction.

[0014] In the present embodiment, the positive column and the negative column are respectively arranged on both sides of the housing with respect to the first direction, so that the first cathode tab and the second cathode tab located between the first main body and the second main body are connected to the positive column by extending laterally, and the first anode tab and the second anode tab located between the first main body and the second main body are connected to the negative column by extending laterally, thereby shortening the length of the first connecting piece and the second connecting piece and reducing the length of the first connecting piece and the second connecting piece, so that circuit loss and heat generation can be reduced.

[0015] In some embodiments, the battery cell further comprises a first end cap and a second end cap, a first opening is provided on a first side of the housing and a second opening is provided on a second side of the housing, the first end cap closes the first opening and the second end cap closes the second opening. By arranging two end caps, the electrode assembly can be mounted in the housing along a direction perpendicular to the first direction, and then the two openings can be closed by the two end caps, thereby improving the convenience of assembly.

[0016] In some embodiments, the battery cell further comprises a first sleeve, and the positive column comprises a first inner electrode column and a first outer electrode column, the first sleeve is installed on a first end cap, the first outer electrode column is installed on the outside of the first end cap and connected to the first sleeve, the first connecting piece is connected to a first end of the first inner electrode column, and a second end of the first inner electrode column passes through the first sleeve and is connected to the first sleeve on the outside of the housing. This structure can improve the ease of assembly of the battery cell and is advantageous for fixing and connecting the first inner electrode column and the first sleeve outside the housing, thereby improving the convenience of operation.

[0017] In some embodiments, the battery cell further comprises a second sleeve, and the negative electrode pillar comprises a second inner electrode pillar and a second outer electrode pillar, the second sleeve is installed on a second end cap, the second outer electrode pillar is installed on the outside of the second end cap and connected to the second sleeve, the second connecting piece is connected to a second end of the second inner electrode pillar, and the second end of the second inner electrode pillar passes through the second sleeve and is connected to the second sleeve on the outside of the housing. This structure can improve the ease of assembly of the battery cell and is advantageous for fixing and connecting the second inner electrode pillar and the second sleeve outside the housing, thereby improving the convenience of operation.

[0018] In some embodiments, the first connecting piece includes a first connecting portion extending along a direction perpendicular to the first direction, the first connecting portion is connected to a first cathode tab and a second cathode tab, and the end of the first connecting portion near the anode column is connected to the anode column, or, the first connecting piece includes a first connecting portion extending along a direction perpendicular to the first direction and a second connecting portion extending along a direction parallel to the first direction, the first connecting portion and the second connecting portion are connected in an L-shape, the first connecting portion is connected to a first cathode tab and a second cathode tab, and the second connecting portion is connected to the anode column. This structure is advantageous for improving the stability of the electrical connection between the first connecting piece and the anode column by increasing the contact area between the first connecting piece and the anode column.

[0019] In some embodiments, the second connecting piece includes a third connecting portion extending along a direction perpendicular to the first direction, the third connecting portion being connected to the first anode tab and the second anode tab, and the end of the third connecting portion near the cathode column being connected to the cathode column; or, the second connecting piece includes a third connecting portion extending along a direction perpendicular to the first direction and a fourth connecting portion extending along a direction parallel to the first direction, the third connecting portion and the fourth connecting portion being connected in an L-shape, the third connecting portion being connected to the first anode tab and the second anode tab, and the fourth connecting portion being connected to the cathode column. This structure is advantageous for improving the stability of the electrical connection between the second connecting piece and the cathode column by increasing the contact area between the second connecting piece and the cathode column.

[0020] In some embodiments, the battery cell further comprises a first insulating member disposed in a housing to electrically insulate the positive pole and the housing, and / or further comprises a second insulating member disposed in a housing to electrically insulate the negative pole and the housing. By disposing of the first insulating member and the second insulating member, the risk of short circuits between the positive and negative poles can be reduced and the safety of use of the battery cell can be improved.

[0021] In some embodiments, the battery cell further includes a support plate disposed between one end of a second main body part moving away from the first main body part and the housing.

[0022] By placing a support plate, the stability of the electrode assembly can be improved, and it is advantageous to prevent the first main body and the second main body from being pressurized, thereby effectively protecting the electrode assembly and avoiding affecting the current output of the electrode assembly.

[0023] In some embodiments, the support plate and the housing are insulated from each other, and the end of the first main body part away from the second main body part and the housing are insulated from each other. By doing so, the first main body part and the second main body part are kept insulated from the housing, thereby preventing the housing from becoming charged and causing dangerous accidents such as electric shock.

[0024] In some embodiments, a bracket supported between the first electrode assembly and the second electrode assembly is further included.

[0025] In the above embodiment, by arranging the bracket, it can serve to support the first main body and the second main body, thereby preventing the stability and reliability of the electrical connection components from being affected by the pulling of other electrical connection components caused by the movement of the first main body and the second main body without changing the relative position of the first main body and the second main body with respect to the housing (1), and is also advantageous for protecting the liquid cooling system placed between the first main body and the housing and effectively ensuring a temperature drop effect.

[0026] In some embodiments, the bracket includes a first support member, a second support member, and a third support member connected between the first support member and the second support member, wherein the first support member is supported between the first main body and the first cathode tab and between the first main body and the first anode tab, and the second support member is supported between the second main body and the second cathode tab and between the second main body and the second anode tab. The advantage of a bracket of this structure is that it can effectively support the first electrode assembly and the second electrode assembly even if either the first electrode assembly or the second electrode assembly is positioned above when the battery cell is in an operating state, and installation and operation are convenient.

[0027] In some embodiments, the first main body is formed by jointly winding a first cathode plate, a first anode plate, and a separator located between the first cathode plate and the first anode plate, and the first direction is parallel to the winding centerline of the first main body, and / or, the second main body is formed by jointly winding a second cathode plate, a second anode plate, and a separator located between the second cathode plate and the second anode plate, and the first direction is parallel to the winding centerline of the second main body.

[0028] In a second aspect, the present application further provides a battery comprising the battery cell described above.

[0029] In a third aspect, the present application provides an electric device comprising the above-described battery for providing electric energy.

[0030] In a fourth aspect, the present application is,

[0031] A step of providing a first electrode assembly comprising a housing, a first main body portion, and a first cathode tab and a first anode tab extending from the first main body portion, and a second electrode assembly comprising a second main body portion and a second cathode tab and a second anode tab extending from the second main body portion;

[0032] A step of mounting both the first electrode assembly and the second electrode assembly in the housing; and

[0033] A method for manufacturing a battery cell is provided, comprising the step of arranging a first body part and a second body part at a distance along a first direction such that a first cathode tab and a first anode tab are positioned at one end of a first body part close to a second body part along a first direction, and a second cathode tab and a second anode tab are positioned at one end of a second body part close to a first body part along a first direction.

[0034] In the fifth aspect, the present application is,

[0035] A providing device configured to provide a first electrode assembly comprising a housing, a first main body portion, and a first cathode tab and a first anode tab extending from the first main body portion, and a second electrode assembly comprising a second main body portion and a second cathode tab and a second anode tab extending from the second main body portion; and

[0036] A battery cell manufacturing apparatus comprising: a mounting device configured such that a first electrode assembly and a second electrode assembly are both mounted in a housing, and a first main body and a second main body are arranged spaced apart along a first direction such that a first cathode tab and a first anode tab are positioned at one end of a first main body close to a second main body along a first direction, and a second cathode tab and a second anode tab are positioned at one end of a second main body close to a first main body along a first direction.

[0037] Since the battery and electric device according to the present application both include a battery cell according to an embodiment of the present application, both the battery and the electric device have the advantage of being able to secure space for arranging a cooling device, thereby expanding the placement space of the liquid cooling system and improving the temperature reduction effect, furthermore, improving safety performance and extending the service life. The method for manufacturing a battery cell and the device for manufacturing a battery cell according to the present application also have the above advantages, so a detailed description is omitted here.

[0038] The above description is merely an overview of the technical solution of the present application, and in order to understand the technical solution of the present application more clearly, it may be implemented in accordance with the contents of the specification. The following describes specific embodiments according to the present application so that the above-mentioned purpose and other purposes, features, and advantages of the present application are more obvious and easy to understand. Brief explanation of the drawing

[0039] In order to more clearly explain the technical solution according to the embodiments of the present application, we will briefly introduce the accompanying drawings that should be referenced when describing the embodiments of the present application. However, the following accompanying drawings are merely some embodiments of the present application, and it is obvious that a person skilled in the art to which the present application pertains can derive other drawings from these drawings without creative effort. FIG. 1 is a schematic diagram of an electrical device disclosed in some embodiments of the present application. FIG. 2 is a schematic structural diagram of a battery disclosed in some embodiments of the present application. FIG. 3 is a perspective view of a battery cell disclosed in some embodiments of the present application. FIG. 4 is a front view of a battery cell disclosed in some embodiments of the present application. FIG. 5 is a plan view of a battery cell disclosed in some embodiments of the present application. FIG. 6 is a left side view of a battery cell disclosed in some embodiments of the present application. FIG. 7 is a cross-sectional view following the AA section of FIG. 4 in some embodiments of the present application. FIG. 8 is an enlarged view of the portion labeled P1 in FIG. 7 in some embodiments of the present application. FIG. 9 is an enlarged view of the portion labeled P2 in FIG. 7 in some embodiments of the present application. FIG. 10 is an enlarged view of the portion labeled P3 in FIG. 7 in some embodiments of the present application. FIG. 11 is a cross-sectional view following the BB section of FIG. 4 in some embodiments of the present application. FIG. 12 is a cross-sectional view following the AA section of FIG. 5 in some embodiments of the present application. FIG. 13 is an enlarged view of the portion labeled P4 in FIG. 12 in some embodiments of the present application. FIG. 14 is a schematic diagram of the connection structure of the cathode pillar and the second connecting piece in some embodiments of the present application. FIG. 15 is a cross-sectional view following the AA section of FIG. 5 in another embodiment of the present application. FIG. 16 is an enlarged view of the portion labeled P5 in FIG. 15 in some embodiments of the present application. FIG. 17 is a schematic diagram of the connection structure of the cathode pillar and the second connecting piece in some other embodiments of the present application. FIG. 18 is a front view of a bracket in a battery cell disclosed in some embodiments of the present application. FIG. 19 is a plan view of a bracket in a battery cell disclosed in some embodiments of the present application. FIG. 20 is a left side view of a bracket in a battery cell disclosed in some embodiments of the present application. In the attached drawing, the size is not drawn according to the actual scale. Specific details for implementing the invention

[0040] Hereinafter, embodiments according to the technical solution of the present application will be described in detail with reference to the attached drawings. The following embodiments are used merely to more clearly explain the technical solution of the present application and are therefore used only as examples and should not be used to limit the scope of protection of the present application.

[0041] All technical and scientific terms used in this document, unless otherwise defined, have the meaning generally understood by those skilled in the art to which this application pertains; the terms used in this document are merely for describing specific embodiments and are not intended to limit this application; and the terms “comprising” and “having,” and any variations thereof, in the specification, claims, and brief description of the drawings of this application are intended to encompass non-exclusive inclusions.

[0042] In describing the embodiments of this application, technical terms such as "first," "second," etc., are used merely to distinguish different objects and should not be understood as indicating or implying relative importance, or implying the number, specific order, or master-slave relationship of the technical features mentioned. Furthermore, the term "vertical" is not strictly vertical but is within an acceptable margin of error. "Parallel" is not strictly parallel but is within an acceptable margin of error.

[0043] The term "Examples" as used herein indicates that specific features, structures, or characteristics described in connection with the Examples may be included in at least one of the Examples of this Application. Phrases located at various points in the specification do not necessarily refer to the same Example, nor do they refer to separate or alternative Examples that are mutually exclusive from other Examples. It will be understood, both expressly and implicitly, by those skilled in the art, that the Examples described herein may be combined with other Examples.

[0044] In describing the embodiments of the present application, the term "and / or" is used to describe the association between related objects and indicates that there may be three types of relationships; for example, A and / or B indicates three cases, such as A existing independently, A and B existing simultaneously, or B existing independently. In this document, the " / " character generally indicates that the related objects are in an "or" relationship.

[0045] In describing the embodiments of the present application, the term “multiple” refers to two or more unless otherwise explicitly and specifically limited. Likewise, unless otherwise specifically defined, “multiple groups” refers to two or more groups, and “multiple sheets” refers to two or more sheets.

[0046] In describing the embodiments of the present application, technical terms such as “center,” “vertical,” “horizontal,” “length,” “width,” “thickness,” “top,” “bottom,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inside,” “outside,” “clockwise,” “counterclockwise,” “axial,” “radial,” “circular,” etc., indicate orientations or positional relationships based on the orientations or positional relationships depicted in the attached drawings. These terms are intended merely for the convenience and simplification of the description of the embodiments of the present application and do not specify or imply that the mentioned devices or components must have a specific orientation or be configured and operated in a specific orientation; therefore, they should not be understood as limitations on the embodiments of the present application.

[0047] In describing the embodiments of the present application, technical terms such as “installation,” “combination,” “connection,” and “fixing” should be understood in a broad sense, for example, they may be fixed connections, detachable connections, integral connections, mechanical connections, electrical connections, direct connections, indirect connections through an intermediate medium, internal communication between two components, or interactive relationships between two components. A person skilled in the art to which the present application pertains will understand the specific meanings of the above terms in the embodiments of the present application according to the specific circumstances.

[0048] Judging by current market development trends, the application of drive batteries is becoming increasingly widespread. Drive batteries are used not only in energy storage systems such as hydroelectric, thermal, wind, and solar power plants, but also in electric transportation means like electric bicycles, motorcycles, and vehicles, as well as in various other fields including military equipment and aerospace. As the scope of applications for drive batteries continues to expand, market demand is also steadily growing.

[0049] The inventor of the present application has discovered that during the charging and discharging process, a small amount of heat is generated inside the battery, and if this heat accumulates significantly, the moisture in the electrolyte evaporates and is gradually depleted, leading to a decrease in charging efficiency, deformation of the electrode plates, an increase in internal resistance, accelerated oxidation of mechanical parts, and deterioration of the electrode plates or separators, ultimately resulting in a decrease in battery capacity and a shortened service life.

[0050] To overcome the series of adverse effects caused by battery heat generation, existing related technologies utilize some active cooling measures. For example, a liquid cooling system is installed inside the battery, and cooling and temperature reduction effects are achieved by the liquid in the system. However, due to the structural limitations of the battery cell, the space required for the liquid cooling system is small, and the temperature reduction effect is limited.

[0051] For example, in existing related technologies, the battery cell comprises a housing and the cell, with the cell positioned inside the housing. There is little to no space between the bottom of the cell and the housing, and while there is some space between the cell and the housing that can be used to place a liquid cooling system, the cathode and anode tabs are located at the top of the cell. Consequently, the space available for the liquid cooling system between the top of the cell and the housing is very small, resulting in poor cooling performance.

[0052] The inventors have discovered through further research that, in order to increase the placement space of the liquid cooling system, the cathode tab and anode tab located between the battery cell and the top of the housing can be placed on the side of the housing to secure the entire space between the battery cell and the top of the housing for the placement of the liquid cooling system; however, if placed in this way, more connecting wires must be used to allow the cathode tab and anode tab to be placed on the side of the housing, which can make the wiring inside the battery cell more complex and less safe. Therefore, it is also necessary to improve the structure of the battery cell.

[0053] Based on the above research, the inventors provide a battery cell with an improved structure. In an embodiment of the battery cell according to the present application, a larger space exists between the upper part of the battery cell where the cathode tab and the anode tab are located and the housing. This secures a larger space for arranging a liquid cooling system, thereby effectively improving the cooling effect and preventing heat from accumulating inside the battery cell and affecting the battery's lifespan.

[0054] The battery cell disclosed in the embodiments of the present application may be applied to electrical devices such as vehicles, ships, or aircraft, but is not limited thereto. Since the power supply system of the electrical device may be composed of the battery cell, battery, etc. disclosed in the present application, it is advantageous to accelerate the heat dissipation capacity of the cell and prevent the battery temperature from becoming too high, prevent the gradual depletion of the electrolyte due to the evaporation of moisture, avoid problems such as reduced charging efficiency, deformation of the electrode plates, increased internal resistance, accelerated oxidation of mechanical parts, and deterioration of the electrode plates or separators, and effectively improve the service life of the battery.

[0055] Embodiments of the present application provide an electric device that uses a battery as a power source, and the battery is configured to provide electrical energy to the electric device. The electric device may be, but is not limited to, mobile phones, portable devices, laptops, electric bicycles, electric vehicles, ships, aircraft, electric toys, and power tools, etc. For example, aircraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.; and power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, etc., and include, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, hammers, impact drills, concrete vibrators, and planers.

[0056] For convenience of explanation regarding the embodiments, the following description will be given by way of example in which an electric device according to some embodiments of the present application is a vehicle (1000).

[0057] FIG. 1 is a schematic structural diagram of a vehicle (1000) according to some embodiment of the present application. The vehicle (1000) may be a gasoline / diesel vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range electric vehicle (EREV), etc. A battery (100) is disposed inside the vehicle (1000), and the battery (100) may be disposed at the bottom, front, or rear of the vehicle (1000). The battery (100) may supply power to the vehicle (1000), and, for example, the battery (100) may be used as the operating power source for the vehicle (1000). The vehicle (1000) may further include a controller (200) and a motor (300), and the battery (100) supplies operating power to the motor (300) and other parts of the vehicle, and the controller (200) controls the motor (300) to operate and supplies operating power for, for example, starting, navigation, and driving of the vehicle (1000).

[0058] In some embodiments of the present application, the battery (100) can be used as an operating power source for the vehicle (1000), and can also be used as a driving power source for the vehicle (1000) by replacing fuel oil or natural gas entirely or partially to provide driving power for the vehicle (1000).

[0059] Referring to FIG. 2, FIG. 2 is an exploded view of a battery (100) according to some embodiment of the present application. The battery (100) includes a housing (10a) and a battery cell (20), and the battery cell (20) is accommodated in the housing (10a). Here, the casing (10a) provides a receiving space in which the battery cell (20) is accommodated, and the casing (10a) may be configured in various structures. In some embodiments, the casing (10a) may include a first case portion (101) and a second case portion (102), and the first case portion (101) and the second case portion (102) are covered by each other to jointly define a receiving space (20) for accommodating the battery cell. The second case part (102) may be a hollow structure with one end open, and the first case part (101) may be a plate-like structure. The first case part (101) covers the opening side of the second case part (102), so that a jointly accommodating space is defined by the first case part (101) and the second case part (102). Additionally, both the first case part (101) and the second case part (102) may be hollow structures with one side open, and the opening side of the first case part (101) covers the opening side of the second case part (102). Of course, the casing (10a) formed by the first case part (101) and the second case part (102) may have various shapes, such as a cylinder or a rectangular prism.

[0060] In the battery (100), the battery cells (20) may be multiple, and the multiple battery cells (20) may be connected in series, in parallel, or in a mixed manner. A mixed connection means that the multiple battery cells (20) may be connected in series or in parallel. The multiple battery cells (20) may be directly connected in series, in parallel, or in a mixed manner, and the entire structure formed by the multiple battery cells (20) may be housed in a casing (10a). Of course, the battery (100) may be formed by combining the multiple battery cells (20) in series, in parallel, or in a mixed manner to form a battery module, or the multiple battery modules may be formed integrally by connecting them in series, in parallel, or in a mixed manner and housed in a casing (10a). The battery (100) may further include other structures, for example, the battery (100) may further include a bus member for electrically connecting the multiple battery cells (20).

[0061] Here, a battery cell (20) refers to the smallest unit constituting a battery. The battery cell (20) may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, and the embodiments of the present disclosure are not limited thereto. The battery cell may be cylindrical, flat, rectangular, or other shapes, and the embodiments of the present disclosure are not limited thereto. Battery cells are generally classified into three types according to the packaging method, such as cylindrical battery cells, prismatic battery cells, and soft-package battery cells, and the embodiments of the present disclosure are not limited thereto.

[0062] Referring to FIGS. 3 through 6, each is a perspective view, a front view, a top view, and a left side view of a battery cell (20) according to some embodiments of the present application. In some embodiments according to the present application, the battery cell (20) includes a housing (1) and an electrode assembly, the electrode assembly is disposed inside the housing (1), and the electrode assembly is a component in which an electrochemical reaction takes place in the battery cell (20).

[0063] Housing (1) is a component for providing a receiving space to accommodate an electrode assembly, an electrolyte, and other components inside. Housing (1) includes a receiving body having an opening and an end cap that closes the opening. The receiving body and the end cap may be separate components, and the receiving body is provided with an opening, and the internal environment of the battery cell (20) is formed by the end cap closing the opening. Without limitation, the end cap and the receiving body may be integrated, and specifically, the end cap and the receiving body may first form a common connecting surface before other components are placed in the housing, and when the interior of the receiving body needs to be packaged, the end cap covers the receiving body and the receiving body and the end cap may be packaged as a single unit.

[0064] The receiving body is a component that forms the internal environment of the battery cell (20) in combination with the end cap, and the end cap is a part that covers the opening of the receiving body to isolate the internal environment of the battery cell (20) from the outside. Without limitation, the shape of the end cap can be adapted to the shape of the receiving body to match the receiving body. Optionally, the end cap can be made of a material having a certain hardness and strength, so that it does not easily deform when the end cap is pressurized and expanded, thereby allowing the battery cell (20) to have higher structural strength and improved safety performance.

[0065] In some embodiments, the end cap may further be equipped with a pressure relief mechanism configured to release internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value.

[0066] The housing (1) can have various shapes and sizes, such as a rectangular prism, a cylinder, a hexagonal prism, etc. Specifically, the shape of the housing (1) can be determined according to the specific shape and size of the electrode assembly. The material of the housing (1) can be selected from materials such as copper, iron, aluminum, stainless steel, and aluminum alloy.

[0067] Referring to FIGS. 7 through 12, in some embodiments of the present application, a battery cell comprises a housing (1), a first electrode assembly (2) and a second electrode assembly (3), wherein the first electrode assembly (2) is disposed in the housing (1), and the first electrode assembly (2) comprises a first main body portion (21) and a first cathode tab (22) and a first anode tab (23) extending from the first main body portion (21), and the second electrode assembly (3) is disposed in the housing (1) and comprises a second main body portion (31) and a second cathode tab (32) and a second anode tab (33) extending from the second main body portion (31).

[0068] Here, the first main body part (21) and the second main body part (31) are spaced apart along the first direction, and the first cathode tab (22) and the first anode tab (23) are positioned at one end of the first main body part (21) near the second main body part (31) along the first direction, and the second cathode tab (32) and the second anode tab (33) are positioned at one end of the second main body part (31) near the first main body part (21) along the first direction.

[0069] As shown in FIG. 12, the first cathode tab (22) and the first anode tab (23) each extend downward from the lower part of the first main body (21), and the second cathode tab (32) and the second anode tab (33) each extend upward from the upper part of the second main body (31), and the first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) are all located in the gap between the first main body (21) and the second main body (31).

[0070] In some of the above embodiments, the first main body part (21) and the second main body part (31) are arranged spaced apart along a first direction, and the first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) are all positioned between the first main body part (21) and the second main body part (31), thereby securing a placement space for a liquid cooling system between one end of the first main body part (21) moving away from the second main body part (31) and the housing (1), and / or between one end of the second main body part (31) moving away from the first main body part (21) and the housing (1). As shown in FIG. 8, compared to a solution where the first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) are all positioned in the space between the cell and the top of the housing, the placement space for the liquid cooling system can be greatly expanded, thereby effectively improving the cooling effect and the battery It prevents the cell temperature from becoming too high and further prevents the gradual depletion of the electrolyte due to moisture evaporation, thereby avoiding problems such as reduced charging efficiency, deformation of electrode plates, increased internal resistance, accelerated oxidation of mechanical components, and degradation of electrode plates or separators, and effectively extends the battery's service life.

[0071] In some of the above embodiments, the electrode assembly disposed in a single battery cell comprises two parts, such as a first electrode assembly (2) and a second electrode assembly (3), and the first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) are all disposed between the first main body part (21) and the second main body part (31). In other words, the embodiment of the present application has the electrode assembly comprising two parts and the cathode tab and anode tab are disposed between the two parts, thereby eliminating the need to place the cathode tab and anode tab on the side of the electrode assembly. Since they are disposed on the side of the electrode assembly, there is no need to increase the length of the connecting wire. Therefore, the embodiment of the present application can not only expand the size of the space for disposing of the liquid cooling system and improve the cooling effect, but also prevent increasing the length of the connecting wire and avoid increasing the complexity of the internal wiring of the battery cell.

[0072] In some embodiments, the first main body part (21) includes a first cathode plate and a first anode plate, and the second main body part (31) is disposed in the housing (1), and the second main body part (31) includes a second cathode plate and a second anode plate. In the first main body (21), one end of a portion of the first cathode electrode plate near the second main body (31) along the first direction is extended to protrude from the first main body (21) to form a first cathode tab (22), and one end of a portion of the first anode electrode plate near the second main body (31) near the first main body (21) along the first direction is extended to protrude from the first main body (21) to form a first anode tab (23), and one end of a portion of the second cathode electrode plate near the first main body (21) near the second main body (31) along the first direction is extended to protrude from the second main body (31) to form a second cathode tab (32), and one end of a portion of the second anode electrode plate near the first main body (21) near the second main body (31) near the first main body (21) along the first direction is extended to protrude from the second main body (31) to form a second anode tab (33).

[0073] As illustrated in FIG. 10, the first anode tab (23) is first extended from the first main body part (21) toward the second main body part (31), and then extends laterally along a direction perpendicular to the first direction to form a U-shaped structure with an opening. The second anode tab (33) is first extended from the second main body part (31) toward the first main body part (21), and then extends laterally along a direction perpendicular to the first direction to form a U-shaped structure with an opening. The first cathode tab (22) and the second cathode tab (32) may be formed similarly to the first anode tab (23) and the second anode tab (33), and a detailed description is omitted.

[0074] In some embodiments, the battery cell further comprises a first connecting piece (5), a second connecting piece (6), a positive column (7), and a negative column (8), and the first cathode tab (22) and the second cathode tab (32) are both connected to the first connecting piece (5), the first connecting piece (5) is connected to the positive column (7), the first anode tab (23) and the second anode tab (33) are both connected to the second connecting piece (6), and the second connecting piece (6) is connected to the negative column (8).

[0075] In some of the above embodiments, the first cathode tab (22) and the second cathode tab (32) are both connected to the first connecting piece (5), and the first anode tab (23) and the second anode tab (33) are both connected to the second connecting piece (6). Thus, the first electrode assembly (2) and the second electrode assembly (3) can implement a shared connecting piece, thereby reducing the number of parts of the battery cell (20) and reducing costs. Additionally, the shared connecting piece can simplify the internal structural arrangement of the battery cell (20), save space, and reduce the volume of the battery cell (20).

[0076] As illustrated in FIGS. 10 and 12, the first cathode tab (22) may be positioned opposite the second cathode tab (32), and the first anode tab (23) may be positioned opposite the second anode tab (33), so that a first connecting piece (5) connected to the first cathode tab (22) and the second cathode tab (32), and a second connecting piece (6) connected to the first anode tab (23) and the second anode tab (33) are arranged.

[0077] In some embodiments, the positive column (7) is installed on the first side of the housing (1) and the negative column (8) is installed on the second side of the housing (1), the first side and the second side are positioned opposite each other, and both the first side and the second side are parallel to the first direction.

[0078] By having the positive column (7) and the negative column (8) respectively positioned on both sides of the housing (1) with respect to the first direction, the first cathode tab (22) and the second cathode tab (32) located between the first main body part (21) and the second main body part (31) are connected to the positive column (7) by extending laterally, and the first anode tab (23) and the second anode tab (33) located between the first main body part (21) and the second main body part (31) are connected to the negative column (8) by extending laterally, thereby shortening the length of the first connecting piece (5) and the second connecting piece (6), and by reducing the length of the first connecting piece (5) and the second connecting piece (6), the loss and heat generation of the circuit can be reduced.

[0079] In some embodiments, the battery cell further comprises a first end cap (1a) and a second end cap (1b), a first opening is provided on a first side of the housing (1) and a second opening is provided on a second side of the housing (2), the first end cap (1a) closes the first opening and the second end cap (1b) closes the second opening. A positive electrode column (7) is installed in the first end cap (1a) and a negative electrode column (8) is installed in the second end cap (1b).

[0080] As illustrated in FIGS. 12, 13, 15 and 16, the positive column (7) includes a first inner electrode column (71) and a first outer electrode column (72), the first sleeve (7a) is installed on the first end cap (1a), the first outer electrode column (72) is installed on the outside of the first end cap (1a) and connected to the first sleeve (7a), the first connecting piece (5) is connected to the first end of the first inner electrode column (71), and the second end of the first inner electrode column (71) passes through the first sleeve (7a) and is connected to the first sleeve (7a) on the outside of the housing (1). Compared to the inside, the outside of the housing (1) has a larger working space, so the fixing and connection of the first inner electrode column (71) and the first sleeve (7a) are performed on the outside of the housing (1), which is advantageous for making the work more convenient and improving assembly efficiency.

[0081] By arranging a positive electrode column (7) including a first inner electrode column (71) and a first outer electrode column (72) and a first sleeve (7a), and installing the first sleeve (7a) on the first end cap (1a), when assembling the battery cell, first the first connecting piece (5) is connected to the first end of the first inner electrode column (71), then the electrode assembly is mounted inside the housing (1), and when packaging the first end cap (1a), the second end of the first inner electrode column (71) is allowed to come out of the housing (1) through the first sleeve (7a), and after fixing the first end cap (1a), the first inner electrode column (71) and the first sleeve (7a) are connected on the outside of the housing (1), and the first inner electrode column (71) and the first outer electrode column (72) are connected together through the first sleeve (7a) to form a positive electrode column (7).

[0082] Here, the first sleeve (7a) includes a first sleeve portion and a first limiting portion, and the first end cap (1a) is provided with a first through hole, the first sleeve portion is inserted into the first through hole, the first limiting portion is connected to the first sleeve portion, the first limiting portion is located inside the first end cap (1a), and the size of the first limiting portion is larger than the size of the first through hole, thereby limiting the position of the first sleeve portion and preventing the first sleeve from detaching from the first through hole.

[0083] A second through hole is provided in the center of the first sleeve (7a), and the first inner electrode column (71) includes a first column body and a second limiting part, the first column body is inserted into the second through hole, and the second limiting part is connected to the first column body and the second limiting part is located inside the first sleeve (7a), the size of the second limiting part is larger than the size of the second through hole, and the second limiting part contacts the first limiting part to limit the position of the first column body and prevent the first column body from detaching from the second through hole. The first outer electrode column (72) is electrically connected to the positive electrode of the electrical device.

[0084] The method of connecting the negative electrode pillar (8) and the second end cap (1b) may be the same as or different from the method of connecting the positive electrode pillar (7) and the first end cap (1a). For example, a second sleeve (8a) may or may not be placed between the negative electrode pillar (8) and the second end cap (1b).

[0085] In the embodiment illustrated in FIGS. 12 and 15, a second sleeve (8a) is not provided between the cathode column (8) and the second end cap (1b). The cathode column (8) includes a second inner electrode column (81) and a second outer electrode column (82), the second outer electrode column (82) is positioned outside the second end cap (1b), the first end of the second inner electrode column (81) is located inside the second end cap (1b) and is connected to the second connecting piece (6), and the second end of the second inner electrode column (81) passes through the second end cap (1b) and is connected to the second outer electrode column (82).

[0086] In the embodiment illustrated in FIGS. 14 and 17, a second sleeve (8a) is provided between the cathode column (8) and the second end cap (1b). The cathode column (8) includes a second inner electrode column (81) and a second outer electrode column (82), the second sleeve (8a) is installed on the second end cap (1b), the second outer electrode column (82) is installed on the outside of the second end cap (1b) and connected to the second sleeve (8a), the second connecting piece (6) is connected to the second end of the second inner electrode column (81), and the second end of the second inner electrode column (81) passes through the second sleeve (8a) and is connected to the second sleeve (8a) on the outside of the housing (1). Compared to the inner side, the outer side of the housing (1) has a larger working space, so the second inner electrode column (81) and the second sleeve (8a) can be fixed and connected on the outer side of the housing (1), making the work more convenient and advantageous for improving assembly efficiency.

[0087] By arranging a negative electrode pillar (8) including a second inner electrode pillar (81) and a second outer electrode pillar (82) and a second sleeve (8a), and installing the second sleeve (8a) on the second end cap (1b), when assembling the battery cell, first the second connecting piece (6) is connected to the first end of the second inner electrode pillar (81), then the electrode assembly is mounted inside the housing (1), and when packaging the second end cap (1b), the second end of the second inner electrode pillar (81) is allowed to come out to the outside of the housing (1) through the second sleeve (8a), and after fixing the second end cap (1b), the second inner electrode pillar (81) and the second sleeve (8a) are connected on the outside of the housing (1), and the second inner electrode pillar (81) and the second outer electrode pillar (82) are connected together through the second sleeve (8a) to form a negative electrode pillar (8).

[0088] Here, the second sleeve (8a) includes a second sleeve portion and a third limiting portion, and the second end cap (1b) is provided with a third through hole, the second sleeve portion is inserted into the third through hole, the third limiting portion is connected to the second sleeve portion, and the third limiting portion is located inside the second end cap (1b), and since the size of the third limiting portion is larger than the size of the third through hole, the position of the second sleeve portion is limited and the second sleeve is prevented from detaching from the third through hole.

[0089] A fourth through hole is provided in the center of the second sleeve (8a), and the second inner electrode column (81) includes a first column body and a fourth limiting part. The first column body is inserted into the fourth through hole, and the fourth limiting part is connected to the first column body. The fourth limiting part is located inside the second sleeve (8a), and the size of the fourth limiting part is larger than the size of the fourth through hole. The fourth limiting part contacts the third limiting part to limit the position of the first column body and prevent the first column body from detaching from the fourth through hole. The second outer electrode column (82) is electrically connected to the positive electrode of the electrical device.

[0090] In the case of the embodiment illustrated in FIGS. 12 and 15, when assembling the battery cell, before mounting the electrode assembly to the housing (1), the second inner electrode pillar (81) and the second outer electrode pillar (82) are first installed on the second end cap (1b) from the outside of the housing (1), and the second connecting piece (6) is connected to the first anode tab (23) and the second anode tab (33), then the second connecting piece (6) is connected to the second inner electrode pillar (81), and the first connecting piece (5) is connected to the first cathode tab (22) and the second cathode tab (32), and the first connecting piece (5) is connected to the first inner electrode pillar (71), and then the assembly composed of the second end cap (1b), the negative electrode pillar (8), the second connecting piece (6), the electrode assembly, the first connecting piece (5), and the first inner electrode pillar (71) is mounted inside the housing (1), and finally the first A first end cap (1a) with an outer electrode column (72) and a first sleeve (7a) installed is packaged on the second side of the housing (1) so that the second end of the first inner electrode column (71) comes out to the outside of the housing (1), and the first inner electrode column (71) and the first sleeve (7a) are connected by welding on the outside of the housing (1) so that the assembly can be completed.

[0091] In the case of the embodiment illustrated in FIGS. 14 and 17, a second sleeve (8a) is provided between the cathode column (8) and the second end cap (1b), so that by referring to the assembly method of the first end cap (1a) described above, the first inner electrode column (71) and the first connecting piece (5) are connected first, and the second inner electrode column (81) and the second connecting piece (6) are connected, then the electrode assembly is mounted on the housing (1) and the first end cap (1a) is packaged, and then the second end cap (1b) is packaged while connecting the first inner electrode column (71) and the second sleeve (7a), and then the second inner electrode column (81) and the second sleeve (8a) can be connected.

[0092] The structural form of the first connecting piece (5) and the second connecting piece (6) may have various options.

[0093] For example, in the embodiment illustrated in FIG. 12 and FIG. 13, the first connecting piece (5) includes a first connecting portion (51) extended along a direction perpendicular to the first direction, the first connecting portion (51) is connected to the first cathode tab (22) and the second cathode tab (32), and the end of the first connecting portion (51) near the anode column (7) is connected to the anode column (7).

[0094] In the embodiment illustrated in FIGS. 15 and 16, the first connecting piece (5) includes a first connecting portion (51) extended along a direction perpendicular to the first direction and a second connecting portion (52) extended along a direction parallel to the first direction, and the first connecting portion (51) and the second connecting portion (52) are connected in an L-shape, the first connecting portion (51) is connected to the first cathode tab (22) and the second cathode tab (32), and the second connecting portion (52) is connected to the anode column (7). This structure can improve the stability of the connection between the first connecting piece (5) and the anode column (7) by increasing the contact area between the second connecting portion (52) and the anode column (7).

[0095] Similarly, in the embodiment illustrated in FIG. 12 and FIG. 14, the second connecting piece (6) includes a third connecting part (61) extended along a direction perpendicular to the first direction, the third connecting part (61) is connected to the first anode tab (23) and the second anode tab (33), and the end of the third connecting part (61) near the cathode column (8) is connected to the cathode column (8).

[0096] In the embodiment illustrated in FIGS. 15 and 17, the second connecting piece (6) includes a third connecting part (61) extended along a direction perpendicular to the first direction and a fourth connecting part (62) extended along a direction parallel to the first direction, and the third connecting part (61) and the fourth connecting part (62) are connected in an L-shape, the third connecting part (61) is connected to the first anode tab (23) and the second anode tab (33), and the fourth connecting part (62) is connected to the cathode column (8). This structure can improve the stability of the connection between the second connecting piece (6) and the cathode column (8) by increasing the contact area between the fourth connecting part (62) and the cathode column (8).

[0097] In some embodiments, the battery cell (20) further comprises a first insulating member (9) disposed in the housing (1) to electrically insulate the positive column (7) and the housing (1), and / or the battery cell (20) further comprises a second insulating member (10) disposed in the housing (1) to electrically insulate the negative column (8) and the housing (1).

[0098] By arranging a first insulating member (9) capable of electrically insulating the positive column (7) and the housing (1), and a second insulating member (10) capable of electrically insulating the negative column (8) and the housing (1), the positive column (7) and the negative column (8) are electrically connected through the housing (1), which causes a short circuit in the circuit and thus not only affects the safety of the battery cell but also prevents the battery cell from malfunctioning.

[0099] In some embodiments, the battery cell further includes a support plate (11) disposed between one end of a second main body part (31) that is away from the first main body part (21) and the housing (1).

[0100] As illustrated in FIG. 9, by placing a support plate (11) between the housing (1) and one end of the second main body (31) that is separated from the first main body (21), the contact surface of the second main body (31) that is separated from the first main body (21) can be made flat, which is advantageous for stably maintaining the electrode assembly. Additionally, by increasing the length of the support plate (11) so that the length of the support plate (11) is greater than the length of the electrode assembly, the left and right structures of the housing (1) can be prevented from pressing the first main body (21) and the second main body (31) and affecting the current output of the first main body (21) and the second main body (31).

[0101] In some embodiments, the support plate (11) and the housing (1) are insulated from each other, and the housing (1) is insulated from one end of the first main body (21) that is away from the second main body (31). The advantage of this arrangement is that both the first main body (21) and the second main body (31) remain insulated from the housing (1), thereby avoiding the housing (1) becoming charged and causing an accident such as electric shock.

[0102] As shown in FIG. 8, there is a pre-set gap between the end of the first main body (21) that is away from the second main body (31) and the housing (1). This gap not only allows the one end of the first main body (21) that is away from the second main body (31) and the housing (1) to be kept in an insulated state, but also allows space to be secured for placing a liquid cooling system between the one end of the first main body (21) that is away from the second main body (31) and the housing (1), thereby effectively improving the cooling effect and preventing the temperature of the battery cell (20) from becoming too high.

[0103] In some embodiments, the battery cell (20) further includes a bracket (4) disposed between the first main body part (21) and the second main body part (31).

[0104] By placing the bracket (4), it can serve to support the first main body part (21) and the second main body part (31), thereby allowing the first main body part (21) and the second main body part (31) to be maintained in a preset position. This prevents the positions of the first main body part (21) and the second main body part (31) from shifting relative to the housing (1) due to self-gravity or external forces, thereby preventing the first main body part (21) from moving away from the second main body part (31) and affecting the stability of the liquid cooling system placed between the housing (1) and the first main body part (21) and the housing (1), and preventing it from affecting the cooling effect.

[0105] For example, in an application scenario where the first main body (21) and the second main body (31) are arranged vertically, the bracket (4) can support the first main body (21) located above, thereby preventing the second main body (31) from being pressed by the gravity of the first main body (21) and causing compression damage to the second main body (31). Additionally, by supporting the first main body (21), the bracket (4) can prevent the first main body (21) located above from moving downward by gravity and pulling the liquid cooling system placed between the first main body (21) and the housing (1), thereby preventing the liquid cooling system from becoming unstable and affecting the temperature drop effect.

[0106] In some embodiments, the first main body (21) includes a first cathode plate, a first anode plate, and a first separator that insulates the first cathode plate and the first anode plate, and the second main body (31) includes a second cathode plate, a second anode plate, and a second separator that insulates the second cathode plate and the second anode plate, and the bracket (4) is supported between the first separator and the second separator. The advantage of this arrangement is that the bracket (4) prevents the first cathode plate, the first anode plate, the second cathode plate, and the second anode plate from causing compression damage, protects the first cathode plate, the first anode plate, the second cathode plate, and the second anode plate, and is advantageous for improving the lifespan of the plates.

[0107] In order to allow the bracket (4) to be supported between the first separator and the second separator, one end of the first separator near the second main body (31) along the first direction can protrude from the first main body (21), so that the one end of the first separator near the second main body (31) along the first direction is longer than the first cathode plate and the first anode plate, thereby allowing the first separator to come into contact with the bracket (4) and maintaining support for the first separator by the bracket (4), thereby protecting the first cathode plate and the first anode plate from compression damage, and one end of the second separator near the first main body (21) along the first direction can protrude from the second main body (31), so that the one end of the second separator near the first main body (21) along the first direction is longer than the second cathode plate and the second anode plate, so that the second separator By allowing contact with the bracket (4) and maintaining support for the second separator by the bracket (4), the second cathode plate and the second anode plate are protected from compression damage.

[0108] In order to form the first cathode tab (22), one end of a portion of the first cathode electrode plate near the second main body part (31) along the first direction must be made to protrude from the first main body part (21), that is, one end of the first cathode electrode plate near the second main body part (31) along the first direction must be longer than the first anode electrode plate and the first separator; in order to form the first anode tab (23), one end of a portion of the first anode electrode plate near the second main body part (31) along the first direction must be made to protrude from the first main body part (21), that is, one end of the first anode electrode plate near the second main body part (31) along the first direction must be longer than the first cathode electrode plate and the first separator; and in order for the bracket (4) to be supported on the first separator, one end of the first separator near the second main body part (31) along the first direction must be made to protrude from the first main body part (21). It should be noted that, that is, one end of the first separator near the second main body (31) along the first direction must be longer than the first cathode plate and the first anode plate. These three settings may be misunderstood as being contradictory, but in reality they are not contradictory. This is because the end surface of the first main body (21) near the second main body (31) has a pre-set area, so in order to form the first cathode tab (22) and the first anode tab (23), or to allow the bracket (4) to be supported on the first separator, the entire end surface of the first main body (21) near the second main body (31) does not need to be provided with the same structure; the corresponding arrangement can be performed in the pre-set area, thus achieving the purpose by arranging by area.

[0109] Likewise, in order to form the second cathode tab (32), one end of a portion of the second cathode electrode plate near the first main body part (21) along the first direction must be made to protrude from the second main body part (31), that is, one end of the second cathode electrode plate near the first main body part (21) along the first direction must be longer than the second anode electrode plate and the first separator, and in order to form the second anode tab (33), one end of a portion of the second anode electrode plate near the first main body part (21) along the first direction must be made to protrude from the second main body part (31), that is, one end of the second anode electrode plate near the first main body part (21) along the first direction must be longer than the second cathode electrode plate and the second separator, and in order for the bracket (4) to be supported on the second separator, one end of the second separator near the first main body part (21) along the first direction must be the second It should be noted that the second separator should be made to protrude from the main body (31), that is, the end of the second separator near the first main body (21) along the first direction should be longer than the second cathode plate and the second anode plate. These three settings may be misunderstood as being contradictory, but in reality they are not contradictory. This is because the end surface of the second main body (31) near the first main body (21) has a pre-set area, so in order to form the second cathode tab (32) and the second anode tab (33), or to allow the bracket (4) to be supported on the second separator, the entire end surface of the second main body (31) near the first main body (21) does not need to be provided with the same structure; instead, the corresponding arrangement can be performed in a pre-set area, thus achieving the purpose by arranging them by area.

[0110] In some embodiments, the bracket (4) includes a first support member (41), a second support member (42), and a third support member (43) connected between the first support member (41) and the second support member (42). The first support member (41) is supported between the first main body part (21) and the first cathode tab (22) and between the first main body part (21) and the first anode tab (23), and the second support member (42) is supported between the second main body part (31) and the second cathode tab (32) and between the second main body part (31) and the second anode tab (33). The advantage of the bracket (4) of this structure is that it can effectively support the first electrode assembly (2) and the second electrode assembly (3) even if either the first electrode assembly (2) or the second electrode assembly (3) is positioned above the battery cell (20) when the battery cell (20) is in an operating state, and installation and operation are convenient.

[0111] As illustrated in FIGS. 16 to 18, the side of the bracket (4) is formed in a U-shape, and this structure can support the first electrode assembly (2) and the second electrode assembly (3) through the first support member (41) and the second support member (42), respectively. The first support member (41) can be inserted into an opening formed by bending the first cathode tab (22) and the first anode tab (23), respectively, and the second support member (42) can be inserted into an opening formed by bending the second cathode tab (32) and the second anode tab (33).

[0112] In some embodiments, the battery cell (20) further includes a liquid cooling system disposed between one end of the first body part (21) away from the second body part (31) and the housing (1). Since the first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) are all disposed between the first body part (21) and the second body part (31), the first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) do not occupy the space between the one end of the first body part (21) away from the second body part (31) and the housing (1), the placement space of the liquid cooling system is expanded, furthermore, the temperature drop effect is enhanced, the temperature of the battery cell (20) is effectively controlled, and the safety performance and service life of the battery cell (20) can be improved.

[0113] In some embodiments, the first main body (21) further includes a first separator, and the first main body (21) is formed by jointly winding the first cathode plate, the first anode plate, and the first separator, and the first direction is parallel to the winding centerline of the first main body (21), and / or, the second main body (31) further includes a second separator, and the second main body (31) is formed by jointly winding the second cathode plate, the second anode plate, and the second separator, and the first direction is parallel to the winding centerline of the second main body (31). In these embodiments, both the first main body (21) and the second main body (31) are winding structures, and when adopting a winding structure, the first direction is the winding centerline of the first main body (21) and the second main body (31).

[0114] In another embodiment, the first main body part (21) and the second main body part (31) may be manufactured by stacking a cathode electrode plate, an anode electrode plate, and a separator, and when adopting such a stacked structure, the direction in which the cathode electrode plate and the anode electrode plate can protrude from both ends can be selected as the first direction.

[0115] The present application further provides a battery comprising the battery cell described above.

[0116] The present application further provides an electric device comprising the above-described battery for providing electric energy.

[0117] This application is,

[0118] A step of providing a first electrode assembly (2) comprising a housing (1), a first main body portion (21), and a first cathode tab (22) and a first anode tab (23) extending from the first main body portion (21), and a second electrode assembly (3) comprising a second main body portion (31) and a second cathode tab (32) and a second anode tab (33) extending from the second main body portion (31);

[0119] A step of mounting both the first electrode assembly (2) and the second electrode assembly (3) in the housing (1); and

[0120] A method for manufacturing a battery cell further comprises the step of arranging the first main body (21) and the second main body (31) at a distance along the first direction such that the first cathode tab (22) and the first anode tab (23) are positioned at one end of the first main body (21) close to the second main body (31) along the first direction, and the second cathode tab (32) and the second anode tab (33) are positioned at one end of the second main body (31) close to the first main body (21) along the first direction.

[0121] The present application comprises a providing device configured to provide a first electrode assembly (2) comprising a housing (1), a first main body portion (21), and a first cathode tab (22) and a first anode tab (23) extending from the first main body portion (21), and a second electrode assembly (3) comprising a second main body portion (31) and a second cathode tab (32) and a second anode tab (33) extending from the second main body portion (31); A battery cell manufacturing apparatus further comprises a mounting device configured such that the first electrode assembly (2) and the second electrode assembly (3) are both mounted in a housing (1), and the first cathode tab (22) and the first anode tab (23) are positioned at one end of the first main body (21) close to the second main body (31) along the first direction, and the second cathode tab (32) and the second anode tab (33) are positioned at one end of the second main body (31) close to the first main body (21) along the first direction, thereby arranging the first main body (21) and the second main body (31) at a distance along the first direction.

[0122] The positive effects of each embodiment of the battery cell according to the present application are applicable to batteries, electric devices, methods for manufacturing battery cells, and devices for manufacturing battery cells, and a repeated description thereof is omitted.

[0123] Hereinafter, the structure of some embodiments of a battery cell according to the present application will be described with reference to FIGS. 3 to 16.

[0124] As illustrated in FIGS. 3 to 6, each is a perspective view, a front view, a top view, and a left side view of a battery cell (20). The battery cell (20) includes a housing (1), and the housing (1) includes a receiving body, a first end cap, and a second end cap. A first opening is provided on the left side of the receiving body and a second opening is provided on the right side. The first end cap closes the first opening and the second end cap closes the second opening. A negative electrode column (8) is installed in the first end cap and a positive electrode column (7) is installed in the second end cap.

[0125] As shown in FIGS. 7 to 12, a first electrode assembly (2) and a second electrode assembly (3) are arranged inside the housing (1), the first direction is the up-down direction, and the first electrode assembly (2) is placed on top of the second electrode assembly (3). The first electrode assembly (2) and the second electrode assembly (3) have the same structure and are arranged symmetrically up-down with respect to the centerline between the first electrode assembly (2) and the second electrode assembly (3).

[0126] The first electrode assembly (2) includes a first main body portion (21), a first cathode tab (22) extending downward from the first main body portion (21), and a first anode tab (23). The second electrode assembly (3) includes a second main body portion (31), a second cathode tab (32) extending upward from the second main body portion (31), and a second anode tab (33). The first cathode tab (22) and the second cathode tab (32) are positioned opposite each other on one side of the housing (1) near the second end cap. The first anode tab (23) and the second anode tab (33) are positioned opposite each other on one side of the housing (1) near the first end cap.

[0127] The first cathode tab (22), the first anode tab (23), the second cathode tab (32), and the second anode tab (33) are all positioned between the first main body (21) and the second main body (31), and the positive column (7) and the negative column (8) are positioned on the right and left sides of the housing (1), respectively. Thus, the first connecting piece (5) can basically extend horizontally to the positive column (7), and the second connecting piece (6) can basically extend horizontally to the negative column (8), thereby effectively shortening the lengths of the first connecting piece (5) and the second connecting piece (6), reducing heat generation and lowering the temperature of the battery cell (20).

[0128] A first insulating member (9) and a second insulating member (10) are further disposed on the inner side of the housing (1). The first insulating member (9) is intended to electrically insulate the positive column (7) and the housing (1), and the second insulating member (10) is intended to electrically insulate the negative column (8) and the housing (1). The first insulating member (9) and the second insulating member (10) may be made of plastic material. The positive column (7) and the housing (1) and the negative column (8) and the housing (1) may be connected by riveting, and a sealing ring may be disposed at the connection point. The sealing ring may be made of fluororubber material.

[0129] As shown in FIG. 8, there is a pre-set gap between the upper part of the first main body (21) and the upper inner surface of the housing (1), and the gap can secure space for placing a liquid cooling system, and also keep the first main body (21) and the housing (1) in an insulated state.

[0130] As shown in FIG. 9, a support plate (11) is placed between the lower part of the second main body (31) and the lower inner surface of the housing (1), and the placement of the support plate (11) is advantageous for maintaining the stability of the electrode assembly.

[0131] As shown in FIG. 10, the first cathode tab (22) and the first anode tab (23) each extend from the first main body part (21) and are bent to form a U-shaped structure with an opening. The second cathode tab (32) and the second anode tab (33) each extend from the second main body part (31) and are bent to form a U-shaped structure with an opening.

[0132] In the embodiment illustrated in FIGS. 12, 13, 15 and 16, the battery cell comprises a first end cap (1a) and a second end cap (1b), a first opening is provided on a first side of the housing (1), and a second opening is provided on a second side of the housing (2), the first end cap (1a) closes the first opening, and the second end cap (1b) closes the second opening. A positive electrode column (7) is installed in the first end cap (1a), and a negative electrode column (8) is installed in the second end cap (1b). The positive column (7) includes a first inner electrode column (71) and a first outer electrode column (72), the first sleeve (7a) is installed on the first end cap (1a), the first outer electrode column (72) is installed on the outside of the first end cap (1a) and connected to the first sleeve (7a), the first connecting piece (5) is connected to the first end of the first inner electrode column (71), and the second end of the first inner electrode column (71) passes through the first sleeve (7a) and is connected to the first sleeve (7a) on the outside of the housing (1). The cathode column (8) includes a second inner electrode column (81) and a second outer electrode column (82), the second outer electrode column (82) is positioned on the outside of the second end cap (1b), the first end of the second inner electrode column (81) is located on the inside of the second end cap (1b) and is connected to the second connecting piece (6), and the first end of the second inner electrode column (81) passes through the second end cap (1b) and is connected to the second outer electrode column (82).

[0133] In the embodiment illustrated in FIGS. 14 and 17, the cathode column (8) includes a second inner electrode column (81) and a second outer electrode column (82), the second sleeve (8a) is installed on the second end cap (1b), the second outer electrode column (82) is installed on the outside of the second end cap (1b) and connected to the second sleeve (8a), the second connecting piece (6) is connected to the second end of the second inner electrode column (81), and the second end of the second inner electrode column (81) passes through the second sleeve (8a) and is connected to the second sleeve (8a) on the outside of the housing (1).

[0134] As illustrated in FIGS. 12 to 14, in this embodiment, the first connecting piece (5) and the second connecting piece (6) are both flat in shape. One end of the first connecting piece (5) is connected to the first cathode tab (22) and the second cathode tab (32), respectively, and the other end is connected to the positive column (7). One end of the second connecting piece (6) is connected to the first anode tab (23) and the second anode tab (33), respectively, and the other end is connected to the negative column (8).

[0135] As illustrated in FIGS. 15 to 17, in this embodiment, the first connecting piece (5) and the second connecting piece (6) are both L-shaped. The first connecting part (51) of the first connecting piece (5) is connected to the first cathode tab (22) and the second cathode tab (32), respectively, and the second connecting part (52) is connected to the positive column (7). By increasing the contact area between the second connecting part (52) and the positive column (7), the stability of the electrical connection between the second connecting part (52) and the positive column (7) can be strengthened. The third connecting part (61) of the second connecting piece (6) is connected to the first anode tab (23) and the second anode tab (33), respectively, and the fourth connecting part (62) is connected to the cathode pillar (8), and by increasing the contact area between the fourth connecting part (62) and the cathode pillar (8), the stability of the electrical connection between the fourth connecting part (62) and the cathode pillar (8) can be strengthened.

[0136] As illustrated in FIGS. 16 to 18, a bracket (4) is disposed between the first main body part (21) and the second main body part (31), and the bracket (4) has a U-shaped structure. The bracket (4) includes a first support part (41), a second support part (42), and a third support part (43) connected between the first support part (41) and the second support part (42). The first support part (41) and the second support part (42) have a flat structure. The first support part (41) is inserted into an opening formed in the first cathode tab (22) and the first anode tab (23), respectively, and the second support part (42) is inserted into an opening formed in the second cathode tab (32) and the second anode tab (33), respectively.

[0137] Although this application has been described with reference to preferred embodiments, various modifications may be made and equivalents may be substituted without departing from the scope of this application. In particular, each technical feature mentioned in each embodiment may be combined in any way, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein but includes all technical solutions falling within the scope of the claims. Explanation of the symbols

[0138] 1000 : Vehicle 100 : Battery 200 : Controller 300 : Motor 101: 1st case section 102: 2nd case section 10a: Casing 20: Battery cell 1 : Housing 11 : Support plate 1a: 1st end cap 1b: 2nd end cap 2: First electrode assembly 21: First main body part 22: 1st Cathode Tab 23: 1st Anode Tab 3 : Second electrode assembly 31 : Second main body part 32: 2nd cathode tab 33: 2nd anode tab 4 : Bracket 41 : First support 42: 2nd support section 43: 3rd support section 5 : First connecting piece 51 : First connecting part 52 : Second connecting part 6 : Second connecting piece 61: 3rd connection part 62: 4th connection part 7a: 1st sleeve 7: Positive column 71: First inner electrode column 72: First outer electrode column 8a: Second sleeve 8: Cathode pillar 81: Second inner electrode column 82: Second outer electrode column 9: First insulating member 10: Second insulating member

Claims

Claim 1 Housing (1); a first electrode assembly (2) disposed in the housing (1) and comprising a first main body portion (21) and a first cathode tab (22) and a first anode tab (23) extending from the first main body portion (21); a second electrode assembly (3) disposed in the housing (1) and comprising a second main body portion (31) and a second cathode tab (32) and a second anode tab (33) extending from the second main body portion (31); and an anode column (7) electrically connected to the first cathode tab (22) and the first anode tab (23). and a cathode pillar (8) electrically connected to the second cathode tab (32) and the second anode tab (33); wherein the first main body part (21) and the second main body part (31) are spaced apart along a first direction, the first cathode tab (22) and the first anode tab (23) are positioned at one end of the first main body part (21) near the second main body part (31) along the first direction, and the second cathode tab (32) and the second anode tab (33) are positioned at one end of the second main body part (31) near the first main body part (21) along the first direction, the anode pillar (7) is installed on the first side of the housing (1), and the cathode pillar (8) is installed on the second side of the housing (1), the first side and the second side are positioned opposite each other, and both the first side and the second side are the A battery cell that is parallel to a first direction, wherein the first direction is a direction extending from the first main body part (21) to the second main body part (31). Claim 2 A battery cell according to claim 1, further comprising a first connecting piece (5) and a second connecting piece (6), wherein the first cathode tab (22) and the second cathode tab (32) are both connected to the first connecting piece (5), the first connecting piece (5) is connected to the positive column (7), the first anode tab (23) and the second anode tab (33) are both connected to the second connecting piece (6), and the second connecting piece (6) is connected to the negative column (8). Claim 3 A battery cell according to claim 2, further comprising a first end cap (1a) and a second end cap (1b), wherein the first side of the housing (1) is provided with a first opening and the second side of the housing (1) is provided with a second opening, and the first end cap (1a) closes the first opening and the second end cap (1b) closes the second opening. Claim 4 A battery cell according to claim 3, further comprising a first sleeve (7a), wherein the positive electrode column (7) comprises a first inner electrode column (71) and a first outer electrode column (72), wherein the first sleeve (7a) is installed on the first end cap (1a), and the first outer electrode column (72) is installed on the outside of the first end cap (1a) and connected to the first sleeve (7a), and the first connecting piece (5) is connected to the first end of the first inner electrode column (71), and the second end of the first inner electrode column (71) passes through the first sleeve (7a) and is connected to the first sleeve (7a) on the outside of the housing (1). Claim 5 A battery cell according to claim 3, further comprising a second sleeve (8a), wherein the negative electrode column (8) comprises a second inner electrode column (81) and a second outer electrode column (82), wherein the second sleeve (8a) is installed on the second end cap (1b), and the second outer electrode column (82) is installed on the outside of the second end cap (1b) and connected to the second sleeve (8a), and the second connecting piece (6) is connected to the second end of the second inner electrode column (81), and the second end of the second inner electrode column (81) passes through the second sleeve (8a) and is connected to the second sleeve (8a) on the outside of the housing (1). Claim 6 In claim 2, the first connecting piece (5) includes a first connecting portion (51) extended along a direction perpendicular to the first direction, the first connecting portion (51) is connected to the first cathode tab (22) and the second cathode tab (32), and the end of the first connecting portion (51) near the positive column (7) is connected to the positive column (7), or the first connecting piece (5) includes a first connecting portion (51) extended along a direction perpendicular to the first direction and a second connecting portion (52) extended along a direction parallel to the first direction, the first connecting portion (51) and the second connecting portion (52) are connected in an L-shape, the first connecting portion (51) is connected to the first cathode tab (22) and the second cathode tab (32), and the second connecting portion (52) is connected to the positive column (7), a battery cell. Claim 7 In claim 2, the second connecting piece (6) includes a third connecting part (61) extended along a direction perpendicular to the first direction, the third connecting part (61) is connected to the first anode tab (23) and the second anode tab (33), and the end of the third connecting part (61) near the cathode column (8) is connected to the cathode column (8), or the second connecting piece (6) includes a third connecting part (61) extended along a direction perpendicular to the first direction and a fourth connecting part (62) extended along a direction parallel to the first direction, the third connecting part (61) and the fourth connecting part (62) are connected in an L-shape, the third connecting part (61) is connected to the first anode tab (23) and the second anode tab (33), and the fourth connecting part (62) is connected to the cathode column (8), a battery cell. Claim 8 A battery cell according to claim 2, further comprising a first insulating member (9) disposed in the housing (1) and for electrically insulating the positive column (7) and the housing (1), and / or further comprising a second insulating member (10) disposed in the housing (1) and for electrically insulating the negative column (8) and the housing (1). Claim 9 A battery cell according to claim 1, further comprising a support plate (11) disposed between one end of the second main body part (31) moving away from the first main body part (21) and the housing (1). Claim 10 A battery cell according to claim 9, wherein the support plate (11) and the housing (1) are insulated from each other, and the end of the first main body (21) away from the second main body (31) and the housing (1) are insulated from each other. Claim 11 A battery cell according to claim 1, further comprising a bracket (4) supported between the first electrode assembly (2) and the second electrode assembly (3). Claim 12 In claim 11, the bracket (4) comprises a first support member (41), a second support member (42), and a third support member (43) connected between the first support member (41) and the second support member (42), wherein the first support member (41) is supported between the first main body part (21) and the first cathode tab (22) and between the first main body part (21) and the first anode tab (23), and the second support member (42) is supported between the second main body part (31) and the second cathode tab (32) and between the second main body part (31) and the second anode tab (33), a battery cell. Claim 13 A battery cell according to claim 1, wherein the first main body (21) is formed by jointly winding a first cathode plate, a first anode plate, and a separator located between the first cathode plate and the first anode plate, and the first direction is parallel to the winding centerline of the first main body (21), and / or, the second main body (31) is formed by jointly winding a second cathode plate, a second anode plate, and a separator located between the second cathode plate and the second anode plate, and the first direction is parallel to the winding centerline of the second main body (31). Claim 14 A battery comprising a battery cell according to claim 1. Claim 15 An electric device comprising a battery according to Article 14 for providing electric energy. Claim 16 A method for manufacturing a battery cell according to claim 1, comprising: a housing (1), a first electrode assembly (2) including a first cathode tab (22) and a first anode tab (23) extending from the first main body (21), and a second electrode assembly (3) including a second main body (31) and a second cathode tab (32) and a second anode tab (33) extending from the second main body (31); and mounting both the first electrode assembly (2) and the second electrode assembly (3) on the housing (1). A method for manufacturing a battery cell comprising: a step of arranging the first main body (21) and the second main body (31) at a distance along the first direction such that the first cathode tab (22) and the first anode tab (23) are positioned at one end of the first main body (21) near the second main body (31) along the first direction, and the second cathode tab (32) and the second anode tab (33) are positioned at one end of the second main body (31) near the first main body (21) along the first direction. Claim 17 A providing device configured to provide a first electrode assembly (2) comprising a housing (1), a first main body portion (21), and a first cathode tab (22) and a first anode tab (23) extending from the first main body portion (21), and a second electrode assembly (3) comprising a second main body portion (31) and a second cathode tab (32) and a second anode tab (33) extending from the second main body portion (31); A battery cell manufacturing apparatus comprising: a mounting device configured such that the first electrode assembly (2) and the second electrode assembly (3) are both mounted in the housing (1), and the first cathode tab (22) and the first anode tab (23) are positioned at one end of the first main body (21) near the second main body (31) along the first direction, and the second cathode tab (32) and the second anode tab (33) are positioned at one end of the second main body (31) near the first main body (21) along the first direction, wherein the first direction is a direction extending from the first main body (21) to the second main body (31). Claim 18 delete

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