Insulating element, end cap assembly, battery cell, battery and power-consuming device

Abstract

Insulating element for a battery cell, comprising: an insulating element body having a first surface and a second surface arranged opposite each other along its thickness direction, wherein the first surface faces an electrode arrangement of the battery cell and the second surface faces away from the electrode arrangement; a protrusion formed on the first surface that serves to abut the electrode arrangement, wherein the projection is provided with a vent hole, the vent hole extending through the projection along a direction that intersects the thickness direction.

Description

Technical field

[0001] The present application relates to the technical field of batteries, in particular an insulating element, an end cap arrangement, a battery cell, a battery and a power-consuming device. State of the art

[0002] Energy saving and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles have become an important component of the sustainable development of the automotive industry due to their energy-saving and environmentally friendly advantages. Battery technology remains a crucial factor in the development of electric vehicles.

[0003] In the development of battery technology, safety concerns remain a crucial issue alongside improving battery performance. If battery safety cannot be guaranteed, the battery must not be used. Therefore, improving battery safety represents a pressing technical challenge in battery technology. Disclosure of the invention

[0004] The embodiments of the present application provide an insulating element, an end cap arrangement, a battery cell, a battery and a power-consuming device that can improve the safety of the battery cell.

[0005] In a first aspect, the present application provides an insulating element for a battery cell comprising: an insulating element body having a first surface and a second surface arranged opposite each other along its thickness direction, the first surface facing an electrode arrangement of the battery cell and the second surface facing away from the electrode arrangement; a projection formed on the first surface and serving to abut the electrode arrangement, the projection being provided with a vent hole, the vent hole extending through the projection along a direction intersecting the thickness direction.

[0006] In the insulating element according to embodiments of the present application, the vent hole extends through the projection in a direction that intersects the thickness direction. In other words, the direction of extension of the vent hole intersects the thickness direction of the insulating element body, and the vent hole passes through the projection. This allows the gas flowing through the projection to pass through quickly, thereby reducing the obstruction of gas flow by the projection and facilitating gas movement. In the event of thermal runaway within the battery cell and subsequent actuation of a pressure relief mechanism, gas can quickly flow from the gas-generating area toward the pressure relief mechanism to be expelled. This reduces the risk of weld failure at the end cap and the housing body, thus increasing the safety of the battery cell.

[0007] According to some embodiments of the present application, the projection comprises a base surface and an outer circumferential surface, wherein the base surface serves to abut the electrode arrangement, the outer circumferential surface is arranged around the circumference of the base surface, the outer circumferential surface connects the base surface with the first surface, and the vent hole is provided in the outer circumferential surface.

[0008] In the solution described above, the base serves as the surface of the projection for contact with the electrode assembly. This contact allows the insulating element to position the electrode assembly. In the battery cell where this insulating element is used, the electrode assembly exhibits improved mounting stability. A vent hole is provided in the outer circumferential surface to facilitate gas passage through the projection and thus minimize any obstruction of gas flow.

[0009] According to some embodiments of the present application, the projection extends along a first direction, and the vent hole extends through the projection along a second direction perpendicular to the first direction, with both the first direction and the second direction being parallel to the first surface.

[0010] In the solution described above, the direction of extension of the vent hole is perpendicular to the direction of extension of the projection. The length of the vent hole is relatively short, which means that the gas travels a shorter path through the projection. This facilitates rapid gas flow through the projection and thus improves the smooth gas flow.

[0011] According to some embodiments of the present application, the projection is provided with a plurality of vent holes, wherein the plurality of vent holes are spaced apart along the first direction.

[0012] In the solution described above, the numerous vent holes are spaced apart along the extension of the projection, creating multiple gas flow paths. This facilitates gas passage through the projection and improves gas flow efficiency.

[0013] According to some embodiments of the present application, the projection is provided in a plurality, wherein the plurality of projections are spaced apart along the second direction.

[0014] In the solution described above, the numerous projections are spaced apart along the second direction, giving the insulating element increased strength. The insulating element has numerous contact points with the electrode array, allowing for improved positioning of the electrode array.

[0015] According to some embodiments of the present application, the insulating element body is a rectangular plate, wherein the second direction corresponds to the longitudinal direction of the insulating element body. The projection comprises a first projection, a second projection, and a third projection, wherein the first projection and the third projection are located at opposite ends in the longitudinal direction of the insulating element body, and the second projection is arranged between the first projection and the third projection.

[0016] In the solution described above, the first and third projections are located at opposite ends along the length of the insulating element body, and the second projection is situated between the first and third projections. This arrangement provides the insulating element body with improved strength along its length, thus ensuring good positioning of the electrode array.

[0017] According to some embodiments of the present application, the second projection is a hollow structure, wherein the second surface is provided with an opening that is connected to the interior of the second projection, and wherein the vent hole on the second projection is connected to the interior of the second projection.

[0018] In the solution described above, the second projection is a hollow structure. The vent hole of the second projection is connected to its interior, allowing gas to accumulate inside while simultaneously facilitating gas flow. The gas inside the second projection can then flow towards the opening, thus facilitating the expulsion of gas from the second projection.

[0019] According to some embodiments of the present application, the second surface is provided with a recess to bypass a pressure relief mechanism of the battery cell, wherein the recess at least partially overlaps the opening.

[0020] In the solution described above, the recess corresponds to the pressure relief mechanism, and the recess overlaps the opening at least partially. This facilitates the gas flow towards the opening after entering the second projection and allows quick access to the pressure relief mechanism for rapid pressure release.

[0021] In a second aspect, the present application provides an end-cap arrangement for a battery cell comprising: an end cap; an electrode terminal arranged on the end cap; a pressure relief mechanism arranged on the end cap and configured to release internal pressure of the battery cell when the internal pressure reaches a threshold; and an insulating element according to one of the preceding embodiments, wherein the insulating element is arranged on a side of the end cap facing the interior of the battery cell.

[0022] In the end cap arrangement according to the embodiments of the present application, the insulating element is arranged on a side of the end cap facing the interior of the battery cell. The battery cell formed by this end cap arrangement can improve the smooth gas flow, which facilitates the ejection of gas through the pressure relief mechanism and improves the safety of the battery cell.

[0023] According to some embodiments of the present application, the insulating element body is cuboid, the projection comprises a second projection, wherein the second projection is arranged in the central region of the insulating element body and the second projection extends along the width direction of the insulating element body, wherein the vent hole extends through the second projection along the length direction of the insulating element body, and the second projection is a hollow structure, wherein the second surface is provided with an opening connected to the interior of the second projection, the vent hole on the second projection is connected to the interior of the second projection, and the pressure relief mechanism is arranged at the location of the end cap corresponding to the second projection, wherein, along the thickness direction, the projection of the pressure relief mechanism at least partially overlaps the projection of the opening.

[0024] In the solution described above, the pressure relief mechanism is positioned corresponding to the second projection. This second projection is a hollow structure, and the pressure relief mechanism at least partially overlaps the opening. This facilitates the flow of gas towards the pressure relief mechanism after it has accumulated inside the second projection. Consequently, the velocity of the gas flow to the pressure relief mechanism is increased, which facilitates timely pressure release by the mechanism during thermal runaway of the battery cell.

[0025] According to some embodiments of the present application, the second surface is provided with a positioning section, and the end cover is provided with a positioning hole corresponding to the positioning section, wherein the positioning section is inserted into the positioning hole.

[0026] In the solution described above, the positioning section is inserted into the positioning hole to mount the insulating element with the end cap. This structure is simple and facilitates operation.

[0027] In a third aspect, the present application provides a battery cell comprising: a housing body with an end opening; an electrode arrangement arranged in the housing body; and an end cover arrangement according to one of the preceding embodiments, wherein the end cover covers the end opening and the projection rests against the electrode arrangement.

[0028] The battery cell according to the embodiments of the present application, which uses the above-mentioned end cover arrangement, allows the gas that forms inside the battery cell to flow quickly to the pressure relief mechanism during a thermal runaway within the battery cell, thereby increasing the safety of the battery cell.

[0029] According to some embodiments of the present application, the battery cell further comprises an insulating film that encloses the outside of the electrode arrangement in order to insulate and separate the electrode arrangement from the housing body, wherein the insulating film is connected to the projection and the insulating film is provided with a notch, wherein the notch is arranged corresponding to the vent hole, so that the gas that is generated inside the battery cell enters the vent hole through the notch.

[0030] In the solution described above, the notch in the insulating film is positioned corresponding to the vent hole. This arrangement ensures both the connection between the insulating film and the insulating element, as well as effective insulation or separation of the electrode assembly from the insulating film, and simultaneously facilitates gas flow. Thus, the gas located between the insulating film and the housing body can enter the vent hole through the notch and quickly flow to the pressure relief mechanism.

[0031] According to some embodiments of the present application, the insulating film is connected to the projection by hot melting.

[0032] In the solution mentioned above, the insulating film is bonded to the projection by hot melting, thus ensuring the stability of the bond between the insulating film and the projection.

[0033] In a fourth aspect, the present application provides a battery comprising a battery cell according to one of the foregoing embodiments.

[0034] In a fifth aspect, the present application provides a power-consuming device comprising a battery cell according to one of the foregoing embodiments.

[0035] As an illustrative example, a method for manufacturing a battery cell is described which includes: providing a housing body, wherein the housing body has an end opening; providing an electrode arrangement;Providing an end cap arrangement, wherein the end cap arrangement comprises an end cap, an electrode terminal, a pressure relief mechanism and an insulating element, wherein the electrode terminal is arranged at the end cap, wherein the pressure relief mechanism is arranged at the end cap, and the pressure relief mechanism is configured to release internal pressure of the battery cell when the internal pressure reaches a threshold, and wherein the insulating element is arranged at the end cap, and the insulating element comprises an insulating element body and a projection, wherein the insulating element body has a first surface and a second surface arranged opposite each other along its thickness direction, wherein the projection is formed at the first surface, and the projection is provided with a vent hole, the vent hole extending through the projection along a direction that intersects the thickness direction;Placing the electrode assembly in the housing body; and covering the end opening with the end cap, so that the insulating element is located on the side of the end cap facing the interior of the battery cell and the projection rests against the electrode assembly.

[0036] In a seventh aspect, the present application provides a device for manufacturing a battery cell, comprising: a provisioning module for: providing a housing body, providing an electrode assembly, and providing an end cap assembly, wherein the housing body has an end opening, and the end cap assembly comprises an end cap, an electrode terminal, a pressure relief mechanism, and an insulating element, wherein the electrode terminal is located on the end cap, wherein the pressure relief mechanism is located on the end cap, and the pressure relief mechanism is configured to release internal pressure of the battery cell when the internal pressure reaches a threshold, and wherein the insulating element is located on the end cap, and the insulating element comprises an insulating element body and a projection, wherein the insulating element body has a first surface and a second surface.which are arranged opposite each other along its thickness direction, the projection being formed on the first surface, and the projection being provided with a vent hole, the vent hole extending through the projection along a direction that intersects the thickness direction; and a mounting module for placing the electrode assembly in the housing body, the end opening being covered with the end cap such that the insulating element is located on the side of the end cap facing the interior of the battery cell and the projection rests against the electrode assembly.

[0037] The foregoing description merely provides an overview of the technical solutions of the present application. To facilitate a clearer understanding of the technical means of the present application, to make implementation in accordance with the description easier, and to more clearly highlight the aforementioned and other objectives, features, and advantages of the present application, specific embodiments of the present application are hereby listed. Brief description of the drawings

[0038] To better illustrate the technical solutions in the embodiments of the present application, a brief description of the drawings required in the embodiments of the present application is given below.

[0039] Of course, the drawings described below are only some examples of the present application, and other drawings can be produced by a person skilled in the art based on the drawings without any creative effort. Fig. Figure 1 is a schematic representation of the structure of a vehicle according to some embodiments of the present application; Fig. Figure 2 is a schematic representation of the exploded structure of a battery according to some embodiments of the present application; Fig. Figure 3 is a schematic representation of the exploded structure of a battery cell according to some embodiments of the present application; Fig. Figure 4 is a schematic representation of the assembly state of an end cover arrangement and an electrode arrangement according to some embodiments of the present application; Fig. 5 is a left-hand view of the Fig. 4; Fig. Figure 6 is a schematic representation of the structure of an insulating element on a first surface according to some embodiments of the present application; Fig. Figure 7 is a schematic representation of the structure of the insulating element on a second surface according to some embodiments of the present application; Fig. Figure 8 is a schematic representation of the structure of an insulating element on a first surface according to further embodiments of the present application; Fig. Figure 9 is a schematic exploded view of part of the structure of the battery cell according to some embodiments of the present application; Fig. 10 is a schematic representation of an insulating film and an insulating element according to some embodiments of the present application in the installed state; Fig. Figure 11 is a schematic flowchart of a process for manufacturing a battery cell; and Fig. Figure 12 is a schematic flowchart of a device for manufacturing a battery cell according to some embodiments of the present application;

[0040] The drawings in the figures are not to scale. Detailed descriptions

[0041] The following provides a more detailed description of the embodiments of the present application in conjunction with the drawings and exemplary embodiments. The detailed description of the following exemplary embodiments and the drawings serve to illustrate the principles of the present application by way of example, but should not be interpreted as limiting the scope of the present application. That is to say, the present application is not limited to the described exemplary embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as they are generally understood by engineers in the technical field to which the present application relates. The terms used in the description of the present application serve solely to describe specific embodiments and are not intended to limit the scope of the present application. The terms "comprise" and "feature," and all variations thereof, as used in the description and claims of the present application and in the brief description of the drawings, are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of the present application, technical terms such as "first" and "second", etc., are used exclusively to distinguish between different objects and should not be interpreted as indicating or suggesting a relative meaning, nor as implicitly indicating the quantity, particular order, or hierarchical relationship of the specified technical features.

[0044] A reference to "embodiment" in this document means that certain features, structures, or properties described in connection with an embodiment may be included in at least one embodiment of the present application. The appearance of the preceding phrase at various points in the description does not necessarily mean that it refers to the same embodiment, nor does it represent an independent or alternative embodiment that is mutually exclusive with other embodiments. A person skilled in the art expressly and implicitly understands that the embodiments described herein may be combined with other embodiments.

[0045] In the description of embodiments of the present application, the term “several” refers to two or more (including two), likewise “several sets” refers to two or more sets (including two sets) and “several sheets” refers to two or more sheets (including two sheets).

[0046] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "top", "bottom", "front", "back", "left", "right", "vertical", "top right", "bottom right", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are based on the orientation or positional relationships shown in the drawings. These terms serve solely to facilitate and simplify the description of the embodiments of this application and are not intended to indicate or imply that the devices or elements mentioned must necessarily have a particular orientation, be constructed in a particular orientation, or be operated in a particular orientation. Therefore, they should not be interpreted as limitations on the embodiments of this application.

[0047] In the description of this application, it should be noted that the terms "assemble," "connect," and "couple" should be interpreted broadly unless expressly stated and defined otherwise. They may, for example, refer to permanent, detachable, or integral connections; they may denote mechanical or electrical connections; they may mean direct connections or indirect connections via an intermediate medium; and they may encompass internal communication between two components. A person skilled in the art will be able to understand the specific meaning of the above terms in this application within the given context.

[0048] In the present application, the battery cell may comprise 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, etc., without this constituting a limitation of the embodiments of the present application. The battery cell may be cylindrical, flat, cuboid, or have another shape, and the embodiments of the present application are not limited in this respect. Battery cells are generally classified into three types according to the encapsulation method: cylindrical battery cells, square battery cells, and softpack battery cells, and the embodiments of the present application are not limited in this respect.

[0049] The battery mentioned in the embodiments of the present application refers to a single physical module comprising one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may comprise a battery module or a battery pack, etc. A battery generally comprises a housing for enclosing one or more battery cells. The housing can prevent liquids or other foreign matter from interfering with the charging or discharging of the battery cells.

[0050] A battery cell comprises an electrode assembly and an electrolyte solution. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell functions primarily through the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive electrode current collector and a positive electrode active layer. The surface of the positive electrode current collector is coated with the positive electrode active layer. The portion of the current collector not coated with the positive electrode active layer protrudes from the coated current collector. This portion of the current collector not coated with the positive electrode active layer serves as the positive electrode tab.Using lithium-ion batteries as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active substance can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active substance layer. The surface of the negative electrode current collector is coated with the negative electrode active substance layer. The portion of the current collector not coated with the negative electrode active substance layer protrudes from the coated current collector. This portion serves as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active substance can be carbon or silicon.To ensure that large currents can flow without melting, there are several positive electrode tabs stacked on top of each other, and several negative electrode tabs stacked on top of each other. The separator material can be PP (polypropylene) or PE (polyethylene).

[0051] The battery cell further comprises a housing body, an end cap, and an insulating element. The housing body has an opening at one end, the electrode assembly is arranged within the housing body, and the insulating element covers this opening. The insulating element is located on the side of the end cap facing the interior of the battery cell. The insulating element serves to insulate and separate the electrode assembly from the end cap.

[0052] The battery cell further includes a pressure relief mechanism, the pressure relief mechanism being able to be located on the end cover to release internal pressure or temperature of the battery cell.

[0053] The pressure relief mechanism refers to an element or part that is actuated to release the internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a predetermined threshold. The pressure relief mechanism can take the form of an explosion-proof valve, an air valve, a pressure relief valve, or a safety valve, and may, in particular, employ a pressure- or temperature-sensitive element or structure. That is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the pressure relief mechanism performs an action, or a weak structure within the pressure relief mechanism is ruptured, creating an opening or channel through which the internal pressure or temperature can be released.

[0054] The “actuation” mentioned in the present application means that the pressure relief mechanism performs an action or is activated to a specific state, allowing the internal pressure and temperature of the battery cell to be released. Actions performed by the pressure relief mechanism may include, but are not limited to, breaking, shattering, tearing, or opening at least part of the pressure relief mechanism, and the like. When the pressure relief mechanism is actuated, the high-temperature, high-pressure substances (e.g., gas) inside the battery cell are ejected from the actuated location. In this way, a pressure and temperature drop can be brought into the battery cell under control, thereby preventing potentially more serious accidents.

[0055] Battery technology development requires simultaneous consideration of several design factors, such as energy density, discharge capacity, charge and discharge rates, and other performance parameters. Furthermore, battery safety must also be taken into account.

[0056] In the prior art, the end cap of the battery cell is welded to the housing body. The insulating element is located on the side of the end cap facing the interior of the battery cell. A projection is located on the side of the insulating element facing the electrode assembly. This projection serves to abut the electrode assembly, thus ensuring its positioning. Since the pressure relief mechanism is located in the central region of the end cap, and the insulating element is provided with an intermediate projection at a position corresponding to the pressure relief mechanism, the intermediate projection rests against the electrode assembly, thereby reducing vibrations of the electrode assembly. Simultaneously, the surface of the intermediate projection facing the electrode assembly is provided with a vent hole that extends along the thickness direction of the insulating element.However, the inventors discovered that in the event of thermal runaway within the battery cell, the pressure relief mechanism (such as the explosion-proof valve) still faces the problem of not being able to relieve the pressure in time. Analyses revealed that during thermal runaway in a local area of ​​the battery cell, gas production in that area is significant, and the atmospheric pressure in that area rises rapidly. The vent hole on the intermediate protrusion facing the electrode assembly is obstructed by the electrode assembly. Due to this obstruction, the gas flow on both sides of the protrusion is poor, and the amount of gas flowing from the interior of the battery cell toward the pressure relief mechanism is small.The moment the pressure relief mechanism releases the pressure, the gas generated in the area of ​​high gas production cannot flow quickly enough to the pressure relief mechanism to be expelled. Consequently, the gas in this area collides with the adjacent housing body, causing the weld between the housing body and the end cap to crack, resulting in a fire and explosion hazard.

[0057] To improve the safety of battery cells, the inventors conducted in-depth research and developed an insulating element for a battery cell. The insulating element comprises an insulating element body and a projection. The insulating element body has a first surface and a second surface, which are arranged opposite each other along the thickness direction. The first surface faces the electrode assembly of the battery cell, and the second surface faces away from the electrode assembly. The projection is formed on the first surface and serves to abut the electrode assembly. The projection is provided with a vent hole, the vent hole extending through the projection in a direction that intersects the thickness direction. The vent hole facilitates the flow of gas through the projection in a direction that intersects the thickness direction.This reduces the obstruction of the gas flow by the protrusion, improves the smooth gas flow and facilitates the gas flow towards the pressure relief mechanism located on the end cap.

[0058] In a battery cell with such an insulating element, the vent hole runs through the projection in a direction that intersects the thickness direction. In other words, the direction of extension of the vent hole intersects the thickness direction of the insulating element body, and the vent hole passes through the projection. This allows the gas flowing through the projection to pass quickly, reducing any obstruction of gas flow and facilitating gas movement. In the event of thermal runaway within the battery cell and subsequent activation of a pressure relief mechanism, gas can quickly flow from the gas-generating area toward the pressure relief mechanism for ejection. This reduces the risk of weld failure at the end cap and the casing body, thus increasing the safety of the battery cell.

[0059] The battery cell disclosed in the embodiments of the present application can be used in power-consuming devices such as vehicles, ships, or aircraft, but is not limited to such use. The power supply system of this power-consuming device can be made up of the battery cells, batteries, etc., disclosed in the present application.

[0060] The embodiments of the present application provide a power-consuming device that uses the battery cell as a power source. The power-consuming device can be, for example, a mobile phone, a tablet, a laptop, an electric toy, a power tool, an electric bicycle, an electric motorcycle, an electric vehicle, a ship, a spacecraft, etc., but is not limited to these. The electric toy can be a stationary or mobile electric toy such as a game console, an electric toy car, an electric toy ship, and an electric toy airplane, etc., and the spacecraft can be an airplane, a rocket, a space transporter, and a spacecraft, etc.

[0061] For the sake of clarity, the following embodiments are illustrated using a vehicle 1000 as an example of a power-consuming device according to an embodiment of the present application.

[0062] Referring to the drawings, Fig. 1 A schematic representation of the structure of a vehicle 1000 according to some embodiments of the present application. The vehicle can be a fuel-powered vehicle, a gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range-extender vehicle, etc. A battery 100 is located in the vehicle 1000. The battery 100 can be located at the bottom, top, or rear of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000. For example, the battery 100 can be used as an operating current source for the vehicle 1000 in the vehicle's circuit system, for example, to meet the vehicle's power requirements for starting, navigation, and operation.

[0063] The vehicle 1000 can further comprise a controller 200 and a motor 300, wherein the controller 200 is used to control the battery 100 to supply power to the motor 300, for example to meet the work power requirements of the vehicle 1000 when starting, navigating and driving.

[0064] In some embodiments of the present application, the battery 100 can serve not only as an operating current source for the vehicle 1000, but also as a propulsion current source for the vehicle 1000, replacing fuel or natural gas wholly or partially to provide the propulsion of the vehicle 1000.

[0065] Reference is to Fig. Take 2. Fig. Figure 2 is a schematic diagram of the exploded view of battery 100 according to some embodiments of the present application. Battery 100 comprises a box body 10 and a battery cell 20. The battery cell 20 is contained within the box body 10. The box body 10 serves to provide a receiving space for the battery cell 20 and can be configured in various ways. In some embodiments, the box body 10 can comprise a first part 11 and a second part 12. The first part 11 and the second part 12 overlap each other and together define a receiving space for the battery cell 20. The second part 12 can have a hollow structure open at one end, while the first part 11 can have a plate-like structure.The first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 together define a receiving space. The first part 11 and the second part 12 can also each have a hollow structure with an open side, and the open side of the first part 11 covers the open side of the second part 12. Naturally, the box-like body 10 formed by the first part 11 and the second part 12 can have various shapes, for example, the shape of a cylinder, a cuboid, and the like.

[0066] The battery 100 may contain multiple battery cells 20, which can be connected in series, parallel, or a mixed configuration. A mixed configuration means that the battery cells 20 are connected both in series and in parallel. The multiple battery cells 20 can be connected directly in series, parallel, or a mixed configuration, and the resulting assembly can be housed in the box 10. Alternatively, the multiple battery cells 20 in the battery 100 can first be connected in series, parallel, or a mixed configuration to form a battery module. Several battery modules can then be further connected in series, parallel, or a mixed configuration to form a complete unit, which can also be housed in the box 10. The battery 100 may also include additional structures.For example, the battery 100 can also include a current collection component for establishing an electrical connection between the multiple battery cells 20.

[0067] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or have another shape. The embodiments of the present application are described using the example of the battery cell 20 as a cuboid.

[0068] Reference is to Fig. Take 3. Fig. Figure 3 is a schematic representation of the exploded view of battery cell 20 according to some embodiments of the present application. Battery cell 20 is the smallest unit that forms the battery. As shown in Fig. As shown in Figure 3, the battery cell 20 comprises an end cover assembly 21, a housing body 22, an electrode assembly 23 and other functional components.

[0069] The end cover assembly 21 comprises an end cover 211, an electrode connection 212, a pressure relief mechanism 213, and an insulating element 214. The electrode connection 212 and the pressure relief mechanism 213 can be arranged on the end cover 211, and the insulating element 214 is arranged on the inside of the end cover 211.

[0070] The end cap 211 is a component that covers the end opening of the housing body 22 to insulate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 211 can be adapted to the shape of the housing body 22 without restriction to fit it. Optionally, the end cap 211 can be made of a material with a specific hardness and strength (e.g., an aluminum alloy). This prevents the end cap 211 from deforming easily under crushing or impact, thus increasing the structural strength of the battery cell 20 and improving its safety performance. The end cap 211 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0071] The electrode terminal 212 can be used to establish an electrical connection with the electrode arrangement 23 and thus output or input electrical energy from the battery cell 20.

[0072] The pressure relief mechanism 213 is used to release the internal pressure of the battery cell 20 when the internal pressure or temperature of the same reaches a threshold value.

[0073] The housing body 22 is a component that works in conjunction with the end cap 211 to form an internal environment for the battery cell 20. This internal environment can then be used to accommodate the electrode assembly 23, an electrolyte solution, and other components. The housing body 22 and the end cap 211 can be independent components. The housing body 22 can have an end opening, and the end cap 211 can cover this opening to form an internal environment for the battery cell 20. Alternatively, the end cap 211 and the housing body 22 can be integrated. In particular, the end cap 211 and the housing body 22 can form a common interface before other components are inserted into the housing body. To seal the interior of the housing body 22, the housing body 22 is then covered with the end cap assembly 211.The shape of the housing body 22 can be determined according to the specific shape and size of the electrode arrangement 23. The housing body 22 can be made of various materials, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The housing body 22 and the end cap 211 of the embodiments of the present application are joined by welding.

[0074] The electrode assembly 23 is a component in which electrochemical reactions take place in the battery cell 20. One or more electrode assemblies 23 can be contained within the housing body 22. The electrode assembly 23 is primarily formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is typically provided between the positive and negative electrode sheets. The sections of the positive and negative electrode sheets containing active materials form a main body section of the electrode assembly 23, and the sections of the positive and negative electrode sheets without active materials each form an electrode tab.The positive electrode tab and the negative electrode tab can be located together at one end of the main body section or at each end of the main body section. During the charging and discharging process of the battery, the positive electrode active substance and the negative electrode active substance react with the electrolyte solution, and the electrode tab is connected to the electrode terminal 212 via the connecting component 25 to form an electrical circuit.

[0075] The insulating element 214 is arranged on a side of the end cap 211 facing the interior of the battery cell 20. The insulating element 214 can be used to insulate the electrical connection components in the housing body 22 from the end cap 211 in order to reduce the risk of a short circuit. For example, the insulating element 214 can be made of plastic, rubber, or the like.

[0076] According to some embodiments of the present application, reference is made to Fig. 3 and furthermore on the Fig. 4, Fig. 5, Fig. 6 to Fig. Take 7. Fig. Figure 4 is a schematic representation of the assembly state of the end cover arrangement 21 and the electrode arrangement 23 according to some embodiments of the present application. Fig. 5 is a left-hand view of the Fig. 4. Fig. Figure 6 is a schematic representation of the structure of the insulating element 214 on the first surface 21411 according to some embodiments of the present application. Fig. Figure 7 is a schematic representation of the structure of the insulating element 214 at the second surface 21412 according to some embodiments of the present application. The present application provides an insulating element 214 for a battery cell 20. The insulating element 214 comprises an insulating element body 2141 and a projection 2142. The insulating element body 2141 has a first surface 21411 and a second surface 21412, which are arranged opposite each other along its thickness direction Z. The first surface 21411 faces the electrode arrangement 23 of the battery cell 20, and the second surface 21412 faces away from the electrode arrangement 23. The projection 2142 is formed on the first surface 21411, and the projection 2142 serves to abut the electrode arrangement 23. The projection 2142 is provided with a vent hole 2143, and the vent hole 2143 extends through the projection 2142 along a direction that intersects the thickness direction Z.

[0077] In the drawings, the direction marked with the letter Z is the thickness direction of the insulating element body 2141.

[0078] The first surface 21411 faces the electrode arrangement 23 of the battery cell 20, and the second surface 21412 faces away from the electrode arrangement 23. The first surface 21411 and the second surface 21412 are two surfaces of the insulating element body 2141, arranged opposite each other along its thickness direction Z.

[0079] The projection 2142 is a component formed on the first surface 21411 and serves to interact with the electrode arrangement 23. The projection 2142 can be formed integrally with the insulating element body 2141. For example, the projection 2142 and the insulating element body 2141 are formed by hot melting.

[0080] The vent hole 2143 extends through the projection 2142 along a direction that intersects the thickness direction Z, meaning that the extension direction of the vent hole 2143 intersects the thickness direction Z of the insulating element body 2141. For example, the extension direction of the vent hole 2143 can be perpendicular to the thickness direction Z, or the extension direction of the vent hole 2143 can also form an angle with the thickness direction Z.

[0081] The vent hole 2143 is a through hole provided on the projection 2142 to allow a gas flow.

[0082] In the insulating element 214 according to the embodiments of the present application, the vent hole 2143 extends through the projection 2142 along a direction that intersects the thickness direction Z. In other words, the extension direction of the vent hole 2143 intersects the thickness direction Z of the insulating element body 2141, and the vent hole 2143 extends through the projection 2142. This allows the gas flowing through the projection 2142 to pass quickly through the projection 2142, thereby reducing the obstruction of the gas flow through the projection 2142 and facilitating gas movement. In the event of thermal runaway within the battery cell 20 and subsequent actuation of a pressure relief mechanism 213, gas can quickly flow from the gas-generating area toward the pressure relief mechanism 213 to be expelled from the pressure relief mechanism 213.This reduces the risk of weld failure on the end cover 211 and on the housing body 22, thus increasing the safety of the battery cell 20.

[0083] According to some embodiments of the present application and as described in the Fig. 5 and Fig. As shown in Figure 6, the projection 2142 comprises a base area 21421 and an outer circumferential area 21412, wherein the base area 21421 serves to abut the electrode arrangement 23, the outer circumferential area 21412 is arranged around the circumference of the base area 21421, the outer circumferential area 21412 connects the base area 21421 with the first area 21411 and the vent hole 2143 is provided in the outer circumferential area 21412.

[0084] The base area 21421 is the surface of the projection 2142 that faces the electrode arrangement 23. In other words, the base area 21421 is the surface of the projection 2142 that faces away from the first surface 21411.

[0085] The outer circumferential surface 21412 is arranged around the perimeter of the base surface 21421, and the outer circumferential surface 21412 is arranged around the edge of the base surface 21421.

[0086] The base surface 21421 serves as the surface of the projection 2142 for contact with the electrode assembly 23. The contact of the base surface 21421 with the electrode assembly 23 enables the positioning of the electrode assembly 23 by the insulating element 214. In the battery cell 20, in which this insulating element 214 is used, the electrode assembly 23 exhibits improved mounting stability. The outer circumferential surface 21412 incorporates a vent hole 2143 to facilitate gas passage through the projection 2142 and thus minimize any obstruction of the gas flow by the projection 2142.

[0087] In some embodiments, the vent hole 2143 can extend in the thickness direction Z of the insulating element body 2141 from the first surface 21411 towards the base surface 21421. To ensure the strength of the projection 2142, a certain distance is maintained between the vent hole 2143 and the base surface 21421 in the thickness direction Z of the insulating element body 2141.

[0088] According to some embodiments of the present application and as described in the Fig. 6 and Fig. As shown in Figure 7, the projection 2142 extends along a first direction X, and the vent hole 2143 runs through the projection 2142 along a second direction Y perpendicular to the first direction X, with both the first direction X and the second direction Y being parallel to the first surface 21411.

[0089] In the drawings, the direction marked with the letter X is the first direction and the direction marked with the letter Y is the second direction. The first direction X and the second direction Y each run perpendicular to the thickness direction Z of the insulating element body 2141.

[0090] The first direction X and the second direction Y each run parallel to the first surface 21411. In other words: A plane formed by the first direction X and the second direction Y runs parallel to the first surface 21411.

[0091] The direction of extension of the vent hole 2143 is perpendicular to the direction of extension of the projection 2142. The extension length of the vent hole 2143 is relatively short, which means that the gas travels a shorter path through the projection 2142. This facilitates rapid gas flow through the projection 2142 and thus improves the smooth gas flow.

[0092] In further embodiments of the present application, the direction of extension of the vent hole 2143 can also form an angle with the direction of extension of the projection 2142, and the angle is not equal to 90°.

[0093] In further embodiments of the present application, the projection 2142 extends along the first direction X and the vent hole 2143 can also extend along the first direction X through the projection 2142.

[0094] According to some embodiments of the present application, the projection 2142 is provided with a plurality of vent holes 2143, wherein the plurality of vent holes 2143 are spaced apart along the first direction X.

[0095] The plurality of vent holes 2143 is spaced apart along the first direction X. In other words, the plurality of vent holes 2143 is spaced apart along the extension direction of the projection 2142. The plurality of vent holes 2143 can lie in a straight line parallel to the first direction X, or the plurality of vent holes 2143 can also be scattered.

[0096] The numerous vent holes 2143 are spaced apart along the extension of the projection 2142, creating multiple gas flow paths at the projection 2142. This facilitates the passage of gas through the projection 2142 and improves the efficiency of the gas flow.

[0097] According to some embodiments of the present application, the projection 2142 is provided in a plurality, wherein the plurality of projections 2142 are spaced apart along the second direction Y.

[0098] The plurality of projections 2142 is spaced apart along the second direction Y, and the plurality of projections 2142 is arranged parallel to one another. The positions of the vent holes 2143 on the plurality of projections 2142 can be the same, and the vent holes 2143 of the plurality of projections 2142 overlap in the second direction Y, which facilitates processing and manufacturing; or the positions of the vent holes 2143 on the plurality of projections 2142 are each different, and the vent holes 2143 of the plurality of projections 2142 do not overlap or only partially overlap in the second direction Y.

[0099] The numerous projections 2142 are spaced apart along the second direction Y, giving the insulating element 214 increased strength. The insulating element 214 has numerous contact points with the electrode arrangement 23, thus enabling improved positioning of the electrode arrangement 23.

[0100] According to some embodiments of the present application, the insulating element body 2141 is a rectangular plate, wherein the second direction Y corresponds to the longitudinal direction of the insulating element body 2141. The projection 2142 comprises a first projection 2142a, a second projection 2142b, and a third projection 2142c, wherein the first projection 2142a and the third projection 2142c are located at opposite ends in the longitudinal direction of the insulating element body 2141, and the second projection 2142b is arranged between the first projection 2142a and the third projection 2142c.

[0101] The second direction Y is the longitudinal direction of the insulating element body 2141, and the first direction X is the lateral direction of the insulating element body 2141. The projection 2142 extends along the first direction X. The projection 2142 may extend through the insulating element body 2141 in its lateral direction to increase the strength of the insulating element body 2141 in its lateral direction.

[0102] The first projection 2142a and the third projection 2142c are located at opposite ends in the longitudinal direction of the insulating element body 2141, and the second projection 2142b is located between the first projection 2142a and the third projection 2142c. This arrangement gives the insulating element body 2141 improved strength in the longitudinal direction, so that the insulating element 214 exerts a good positioning effect on the electrode arrangement 23 in the longitudinal direction of the insulating element body 2141.

[0103] According to some embodiments of the present application, the second projection 2142b is a hollow structure, wherein the second surface 21412 is provided with an opening 21413 which is connected to the interior of the second projection 2142b, and wherein the vent hole 2143 on the second projection 2142b is connected to the interior of the second projection 2142b.

[0104] The opening 21413 is a region located on the second surface 21412 and serves to connect to the interior of the second projection 2142b. The opening 21413 can be a hollow section of the insulating element 214. For example, the opening 21413 can extend through the insulating element body 2141 in the thickness direction Z of the insulating element body 2141. That is, the opening 21413 can extend from the second surface 21412 to the first surface 21411.

[0105] The second projection 2142b is a hollow structure. The vent hole 2143 of the second projection 2142b is connected to the interior of the second projection 2142b, allowing gas to accumulate in the cavity of the second projection 2142b and simultaneously facilitating gas flow. The gas inside the second projection 2142b can flow towards the opening 21413, thus facilitating the expulsion of gas from the second projection 2142b.

[0106] Reference is to Fig. Take 8. Fig. Figure 8 is a schematic representation of the structure of the insulating element 214 on the first surface 21411 according to further embodiments of the present application. According to some embodiments of the present application and as in Fig. As shown in Figure 8, the projection 2142 can extend along the second direction Y. The second direction Y is the longitudinal direction of the insulating element body 2141, and the vent hole runs along the first direction X through the projection 2142.

[0107] According to some embodiments of the present application and as in Fig. As shown in Figure 7, the second surface 21412 is provided with a recess 21414 to bypass a pressure relief mechanism 213 of the battery cell 20 (see Figure 7). Fig. 3), wherein the recess 21414 overlaps at least partially the opening 21413.

[0108] The recess 21414 is an area of ​​the insulating element body 2141 for mounting with the pressure relief mechanism 213. The recess 21414 can be formed by the second surface 21412 being recessed towards the first surface 21411. The recess 21414 can partially overlap the opening 21413, or the recess 21414 can completely overlap the opening 21413.

[0109] The recess 21414 corresponds to the pressure relief mechanism 213, with the recess 21414 at least partially overlapping the opening 21413. This facilitates the gas flow towards the opening 21413 after entering the second projection 2142b and allows quick access to the pressure relief mechanism 213 for rapid pressure relief.

[0110] According to some embodiments of the present application and as in Fig. As shown in Figure 3, the present application provides an end cap arrangement 21 for a battery cell 20. The end cap arrangement 21 comprises an end cap 211, an electrode terminal 212, a pressure relief mechanism 213, and an insulating element 214 according to one of the preceding embodiments. The electrode terminal 212 is arranged on the end cap 211; the pressure relief mechanism 213 is arranged on the end cap 211 and is configured to release internal pressure from the battery cell 20 when the internal pressure reaches a threshold value. The insulating element 214 is arranged on a side of the end cap 211 facing the interior of the battery cell 20.

[0111] Since the electrode connection 212 is located on the end cover 211, the insulating element 214 is provided with a hole to bypass the electrode connection 212, so that the electrode connection 212 is electrically connected to the electrode arrangement 23 of the battery cell 20.

[0112] In the end cap arrangement 21 according to the embodiments of the present application, the insulating element 214 is arranged on a side of the end cap 211 facing the interior of the battery cell 20. The battery cell 20 formed by this end cap arrangement 21 can improve the smooth gas flow, which facilitates the ejection of gas through the pressure relief mechanism 213 and improves the safety of the battery cell 20.

[0113] According to some embodiments of the present application and as described in the Fig. 3, Fig. 6 and Fig. As shown in Figure 7, the insulating element body 2141 is cuboid; the projection 2142 includes a second projection 2142b, the second projection 2142b being located in the central region of the insulating element body 2141 and extending along the width direction of the insulating element body 2141, with the vent hole 2143 extending through the second projection 2142b along the length direction of the insulating element body 2141. The second projection 2142b is a hollow structure, the second surface 21412 being provided with an opening 21413 that is connected to the interior of the second projection 2142b. The vent hole 2143 on the second projection 2142b is connected to the interior of the second projection 2142b. The pressure relief mechanism 213 is located at the position of the end cover 211 that corresponds to the second projection 2142b.Along the thickness direction Z, the projection of the pressure relief mechanism 213 overlaps at least partially with the projection of the opening 21413.

[0114] The second projection 2142b is located in the central region of the insulating element body 2141, meaning that the second projection 2142b is located at a position on the insulating element body 2141 that is near the center of the insulating element body 2141, but is not limited to being located at the center of the insulating element body 2141. For example, the second projection 2142b can be located at the center of the insulating element body 2141 along its length, or the second projection 2142b can also be located at a certain distance from the center of the insulating element body 2141.

[0115] The second projection 2142b extends along the width direction of the insulating element body 2141. It is possible that the second projection 2142b extends from one edge of the insulating element body 2141 in the width direction to another, opposite edge, that is, the second projection 2142b can run through the insulating element body 2141 along the width direction of the insulating element body 2141.

[0116] The second projection 2142b is a hollow structure. The vent hole 2143 is connected to the interior of the second projection 2142b and extends through it. Gas can enter the interior of the second projection 2142b through the vent hole 2143. Simultaneously, gas inside the second projection 2142b can flow through the opening 21413 toward the end cap 211.

[0117] Along the thickness direction Z, the projection of the pressure relief mechanism 213 at least partially overlaps the projection of the opening 21413. In other words, on a plane perpendicular to the thickness direction Z of the insulating element body 2141, the projection of the pressure relief mechanism 213 at least partially overlaps the projection of the opening 21413. For example, the projection of the pressure relief mechanism 213 may partially overlap the projection of the opening 21413, or the projection of the pressure relief mechanism 213 may completely overlap the projection of the opening 21413.

[0118] The pressure relief mechanism 213 is arranged corresponding to the second projection 2142b. The second projection 2142b is a hollow structure, and the pressure relief mechanism 213 at least partially overlaps the opening 21423. This facilitates the flow of gas towards the pressure relief mechanism 213 after it has collected inside the second projection 2142b. Consequently, the velocity of the gas flow to the pressure relief mechanism 213 is increased, enabling timely pressure relief by the pressure relief mechanism 213 during a thermal runaway of the battery cell 20.

[0119] According to some embodiments of the present application and as in Fig. As shown in Figure 7, the second surface 21412 is provided with a positioning section 21415, and the end cover 211 is provided with a positioning hole (not shown) corresponding to the positioning section 21415, the positioning section 21415 being inserted into the positioning hole.

[0120] The positioning section 21415 is a component located on the second surface 21412 and serves to connect and position it with the end cap 211. The positioning section 21415 may protrude from the second surface 21412. The positioning section 21415 can be a positioning rod, and the cross-section of the positioning rod can be circular, rectangular, triangular, or irregular, etc. Optionally, the cross-section of the positioning rod is circular for simplified machining. The shape of the positioning hole corresponds to the cross-sectional shape of the positioning rod.

[0121] The positioning section 21415 is inserted into the positioning hole to mount the insulating element 214 with the end cap 211. This structure is simple and facilitates operation.

[0122] According to some embodiments of the present application and as described in the Fig. 3, Fig. 4 to Fig. As shown in Figure 5, the present application provides a battery cell 20. The battery cell 20 comprises a housing body 22, an electrode arrangement 23, and an end cap arrangement 21 according to one of the preceding embodiments. The housing body 22 has an end opening, and the electrode arrangement 23 is arranged in the housing body 22. The end cap 211 covers the end opening, and the projection 2142 abuts the electrode arrangement 23.

[0123] The end cover 211 covers the end opening and the insulating element 214 is located on the side of the end cover 211 facing the electrode assembly 23. The projection 2142 of the insulating element 214 rests against the electrode assembly 23 to achieve the positioning of the electrode assembly 23 and to prevent the electrode assembly 23 from moving in the housing body 22.

[0124] The battery cell 20 according to the embodiments of the present application, which uses the above-mentioned end cover arrangement 21, allows the gas that forms inside the battery cell 20 to flow quickly to the pressure relief mechanism 213 during a thermal runaway within the battery cell 20, thereby increasing the safety of the battery cell 20.

[0125] Reference is to Fig. 3 and furthermore on the Fig. 9 and Fig. 10. Fig. Figure 9 is a schematic exploded view of part of the structure of the battery cell 20 according to some embodiments of the present application, and Fig. Figure 10 is a schematic representation of the insulating film 24 and the insulating element 214 according to some embodiments of the present application in the installed state. According to some embodiments of the present application, the battery cell 20 further comprises an insulating film 24, wherein the insulating film 24 encloses the outside of the electrode arrangement 23 and the insulating film 24 serves to insulate and separate the electrode arrangement 23 from the housing body 22, wherein the insulating film 24 is connected to the projection 2142 and the insulating film 24 is provided with a notch 241, wherein the notch 241 is arranged corresponding to the vent hole 2143, so that the gas that forms inside the battery cell 20 enters the vent hole 2143 through the notch 241.

[0126] The insulating film 24 surrounds the electrode assembly 23 to insulate and separate it from the housing body 22. To ensure effective insulation and separation between the electrode assembly 23 and the housing body 22, the insulating film 24 is typically applied around the edge of the electrode assembly 23.

[0127] The notch 241, with which the insulating film 24 is provided, is arranged corresponding to the vent hole 2143. This arrangement ensures both the connection between the insulating film 24 and the insulating element 214 and the effective insulation or separation of the electrode arrangement 23 from the insulating film 24, and can also simultaneously facilitate the gas flow. Thus, the gas located between the insulating film 24 and the housing body 22 can enter the vent hole 2143 through the notch 241 and flow quickly to the pressure relief mechanism 213.

[0128] To ensure a smooth gas flow, notch 241 is located simultaneously, as in Fig. 9 shown, at one end of the insulating film 24, which serves to connect to the insulating element 214, and the notch 241 is further arranged between two adjacent projections 2142, i.e., the area of ​​the insulating film 24 between two adjacent notches 241 is connected to the projection 2142 of the insulating element 214.

[0129] According to some embodiments of the present application, the insulating film 24 is connected to the projection 2142 by hot melting.

[0130] The insulating film 24 is connected to the projection 2142 by hot melting, thereby ensuring the stability of the connection between the insulating film 24 and the projection 2142.

[0131] In some embodiments, an area of ​​the projection 2142, which is connected to the insulating film 24, is provided with a recess 2144 to reduce the weight of the projection 2142.

[0132] According to some embodiments of the present application, the present application provides a battery 100, wherein the battery 100 comprises a battery cell 20 according to one of the preceding embodiments.

[0133] According to some embodiments of the present application, the present application provides a power-consuming device, wherein the power-consuming device comprises a battery cell 20 according to one of the preceding embodiments, wherein the battery cell 20 serves to supply power to the power-consuming device.

[0134] The power-consuming device may be one of the aforementioned devices or systems that use battery cell 20.

[0135] According to some embodiments of the present application and as described in the Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 to Fig. As shown in Figure 10, the present application provides a battery cell 20, the battery cell 20 comprising an end cap assembly 21, a housing body 22, an electrode assembly 23, and an insulating film 24. The end cap assembly 21 comprises an end cap 211, an electrode terminal 212, a pressure relief mechanism 213, and an insulating element 214. The electrode terminal 212 is arranged on the end cap 211, the pressure relief mechanism 213 is arranged on the end cap 211, and the insulating element 214 is arranged on a side of the end cap 211 facing the interior of the battery cell 20. The housing body 22 has an end opening, and the electrode assembly 23 is arranged in the housing body 22. The end cap 211 covers the end opening. The insulating element 214 comprises an insulating element body 2141 and a projection 2142.The insulating element body 2141 has a first surface 21411 and a second surface 21412, which are arranged opposite each other along the thickness direction Z. The first surface 21411 faces the electrode arrangement 23, and the second surface 21412 faces away from the electrode arrangement 23. The projection 2142 is formed on the first surface 21411. The projection 2142 is provided with a vent hole 2143. The vent hole 2143 extends through the projection 2142 along a direction that intersects the thickness direction Z, and the projection 2142 abuts the electrode arrangement 23.The insulating element body 2141 is cuboid; the projection 2142 includes a second projection 2142b, the second projection 2142b being located in the central region of the insulating element body 2141 and extending along the width direction of the insulating element body 2141, with the vent hole 2143 extending through the second projection 2142b along the length direction of the insulating element body 2141. The second projection 2142b is a hollow structure, the second surface 21412 being provided with an opening 21413 that is connected to the interior of the second projection 2142b. The vent hole 2143 on the second projection 2142b is connected to the interior of the second projection 2142b. The pressure relief mechanism 213 is located at the position of the end cover 211 that corresponds to the second projection 2142b. The pressure relief mechanism 213 partially overlaps the opening 21413.

[0136] Since the vent hole 2143 passes through the projection 2142, the obstruction of gas flow by the projection 2142 is reduced. During a thermal runaway within the battery cell 20, the gas generated inside the battery cell 20 can quickly flow to the pressure relief mechanism 213, thereby increasing the safety of the battery cell 20.

[0137] Fig. Figure 11 is a schematic flowchart of a process 400 for manufacturing a battery cell. As in Fig. As shown in Figure 11, the process 400 for manufacturing a battery cell may include the following: Providing 401 a housing body 22, wherein the housing body 22 has an end opening; Providing 402 of an electrode arrangement 23; Providing 403 of an end cap assembly 21, wherein the end cap assembly 21 comprises an end cap 211, an electrode terminal 212, a pressure relief mechanism 213 and an insulating element 214, wherein the electrode terminal 212 is arranged on the end cap 211, and wherein the pressure relief mechanism 213 is arranged on the end cap 211, and the pressure relief mechanism 213 is configured to release internal pressure of the battery cell 20 when the internal pressure reaches a threshold value, and wherein the insulating element 214 is arranged on the end cap 211, and the insulating element 214 comprises an insulating element body 2141 and a projection 2142, wherein the insulating element body 2141 has a first surface 21411 and a second surface 21412 which are arranged opposite each other along its thickness direction Z, the projection 2142 being formed on the first surface 21411 is, and the projection 2142 is provided with a vent hole 2143,wherein the vent hole 2143 extends through the projection 2142 along a direction that intersects the thickness direction Z; Place 404 of the electrode arrangement 23 in the housing body 22; Cover 405 the end opening with the end cover 211, so that the insulating element 214 is located on the side of the end cover 211 facing the interior of the battery cell 20 and the projection 2142 rests against the electrode arrangement 23.

[0138] Fig. Figure 12 is a schematic flowchart of a device 500 for manufacturing a battery cell according to some embodiments of the present application. As in Fig. As shown in Figure 12, the device 500 for manufacturing a battery cell can comprise the following: a provisioning module 501 and an assembly module 502.

[0139] The provisioning module 501 serves to provide a housing body 22, an electrode assembly 23, and an end cap assembly 21, wherein the housing body 22 has an end opening, and wherein the end cap assembly 21 comprises an end cap 211, an electrode terminal 212, a pressure relief mechanism 213, and an insulating element 214, wherein the electrode terminal 212 is arranged on the end cap 211, wherein the pressure relief mechanism 213 is arranged on the end cap 211, and the pressure relief mechanism 213 is configured to release internal pressure from the battery cell 20 when the internal pressure reaches a threshold value, and wherein the insulating element 214 is arranged on the end cap 211, and the insulating element 214 comprises an insulating element body 2141 and a projection 2142, wherein the insulating element body 2141 has a first surface 21411 and a second surface 21412which are arranged opposite each other along its thickness direction Z, wherein the projection 2142 is formed on the first surface 21411, and the projection 2142 is provided with a vent hole 2143, wherein the vent hole 2143 extends through the projection 2142 along a direction that intersects the thickness direction Z;

[0140] The mounting module 502 serves to place the electrode arrangement 23 in the housing body 22, with the end opening being covered by the end cover 211, so that the insulating element 214 is located on the side of the end cover 211 facing the interior of the battery cell 20 and the projection 2142 rests against the electrode arrangement 23.

[0141] Although the present application is described with reference to preferred embodiments, various modifications can be made and equivalents used without altering the scope of the present application. In particular, the technical features mentioned in the various embodiments can be combined in any way, provided there are no structural conflicts. The present application is not limited to the specific embodiments disclosed in the text, but encompasses all technical solutions that fall within the scope of the claims. Reference symbol list 1000 vehicles 100 batteries 200 control 300 engine 10 box bodies 11 Part One 12 Part Two 20 battery cells 21 End cap arrangement 211 End cap 212 Electrode connection 213 Pressure relief mechanism 214 Insulating element 2141 Insulating element body 21411 first area 21412 second area 21413 Opening 21414 recess 21415 Positioning section 2142 lead 2142a first lead 2142b second advantage 2142c third lead 21421 floor area 21422 external perimeter area 2143 Vent hole 2144 In-depth study 22 Housing bodies 221 End opening 23 Electrode arrangement 24 insulating film 241 notch 25 Connecting component

Claims

[1] Insulating element for a battery cell, comprising: an insulating element body having a first surface and a second surface arranged opposite each other along its thickness direction, wherein the first surface faces an electrode arrangement of the battery cell and the second surface faces away from the electrode arrangement; a protrusion formed on the first surface that serves to abut the electrode arrangement, wherein the projection is provided with a vent hole, the vent hole extending through the projection along a direction that intersects the thickness direction. [2] Insulating element according to claim 1, wherein the projection comprises a base surface and an outer circumferential surface, wherein the base surface serves to abut the electrode arrangement, the outer circumferential surface is arranged around the circumference of the base surface, the outer circumferential surface connects the base surface with the first surface and the vent hole is provided in the outer circumferential surface. [3] Insulating element according to claim 2, wherein the projection extends along a first direction and the vent hole through the projection extends along a second direction perpendicular to the first direction, wherein both the first direction and the second direction are parallel to the first surface. [4] Insulating element according to claim 3, wherein the projection is provided with a plurality of vent holes, wherein the plurality of vent holes are spaced apart along the first direction. [5] Insulating element according to claim 3 or 4, wherein the projection is provided in a plurality, wherein the plurality of projections are spaced apart along the second direction. [6] Insulating element according to claim 5, wherein the insulating element body is a rectangular plate, wherein the second direction corresponds to the longitudinal direction of the insulating element body, and wherein the projection comprises a first projection, a second projection and a third projection, wherein the first projection and the third projection are located at opposite ends in the longitudinal direction of the insulating element body and the second projection is arranged between the first projection and the third projection. [7] Insulating element according to claim 6, wherein the second projection is a hollow structure, wherein the second surface is provided with an opening which is connected to the interior of the second projection, and wherein the vent hole on the second projection is connected to the interior of the second projection. [8] Insulating element according to claim 7, wherein the second surface is provided with a recess to bypass a pressure relief mechanism of the battery cell, wherein the recess at least partially overlaps the opening. [9] End cap arrangement for a battery cell, comprising: an end cap; an electrode connection located on the end cap; a pressure relief mechanism located at the end cap and configured to release internal pressure from the battery cell when the internal pressure reaches a threshold; and an insulating element according to one of claims 1 to 8, wherein the insulating element is arranged on a side of the end cap facing the interior of the battery cell. [10] End cap arrangement according to claim 9, wherein the insulating element body is cuboid, the projection comprises a second projection, the second projection being arranged in the central region of the insulating element body and the second projection extending along the width direction of the insulating element body, the vent hole extending through the second projection along the length direction of the insulating element body, and the second projection being a hollow structure, the second surface being provided with an opening connected to the interior of the second projection, the vent hole on the second projection being connected to the interior of the second projection, and the pressure relief mechanism being arranged at the position of the end cap corresponding to the second projection, wherein along the thickness direction the projection of the pressure relief mechanism at least partially overlaps the projection of the opening. [11] End cap arrangement according to claim 9 or 10, wherein the second surface is provided with a positioning section and the end cap is provided with a positioning hole corresponding to the positioning section, wherein the positioning section is inserted into the positioning hole. [12] Battery cell, comprising: a housing body with an end opening; an electrode arrangement located within the housing body; and an end cover arrangement according to one of claims 9 to 11, wherein the end cover covers the end opening and the projection rests against the electrode arrangement. [13] Battery cell according to claim 12, wherein the battery cell further comprises: an insulating film covering the outside of the electrode assembly to insulate and separate the electrode assembly from the housing body, wherein the insulating film is connected to the projection and the insulating film is provided with a notch, the notch being arranged corresponding to the vent hole so that the gas generated inside the battery cell enters the vent hole through the notch. [14] Battery cell according to claim 13, wherein the insulating film is connected to the projection by hot melting. [15] Battery comprising a battery cell according to any one of claims 12 to 14. [16] Power-consuming device comprising a battery cell according to any one of claims 12 to 14. [17] Device for manufacturing a battery cell, comprising: a provisioning module for: providing a housing body, providing an electrode assembly and providing an end cover assembly, wherein the housing body has an end opening, and the end cover assembly comprises an end cover, an electrode connection, a pressure relief mechanism and an insulating element, wherein the electrode connection is arranged at the end cap, wherein the pressure relief mechanism is arranged at the end cap, and the pressure relief mechanism is configured to release internal pressure of the battery cell when the internal pressure reaches a threshold, and wherein the insulating element is arranged at the end cap, and the insulating element comprises an insulating element body and a projection, wherein the insulating element body has a first surface and a second surface arranged opposite each other along its thickness direction, wherein the projection is formed at the first surface, and the projection is provided with a vent hole, the vent hole extending through the projection along a direction that intersects the thickness direction; and a mounting module for placing the electrode arrangement in the housing body, wherein the end opening is covered with the end cover, so that the insulating element is located on the side of the end cover facing the interior of the battery cell and the projection rests against the electrode arrangement.

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