Support, battery cell, battery and electrical device

Abstract

The present invention relates to a support, a battery cell, a battery, and an electric device. The support includes a support body having a through hole for exposing a portion of the electrode post, and a first guide portion provided on the support body for guiding the conductive portion of the electrode assembly so that it passes through the through hole and connects to the electrode post. By providing the first guide portion on the support body, the first guide portion can guide and protect the conductive portion of the electrode assembly during the process of installing the electrode assembly into the battery cell case, allowing the conductive portion of the electrode assembly to gradually enter the through hole, reducing the probability of the conductive portion colliding with the support body and reducing the risk of failure and damage to the electrode assembly, and improving the reliability and stability of the battery cell.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application is filed based on and claims priority from a Chinese patent application with application number 202322017388.3 and filing date July 28, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of batteries, and in particular to supports, battery cells, batteries and electrical devices. [Background technology]

[0003] Energy conservation and pollutant emission reduction are key to the sustainable development of the automotive industry, and electric vehicles have become an important component of this industry due to their advantages in energy conservation and environmental protection. Battery technology is a key factor in the development of electric vehicles. In terms of related technologies, there is still room for improvement in the reliability of battery cells, which hinders further improvements in battery reliability. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above problems, the present application provides a highly reliable support, a battery cell, a battery, and an electric device. [Means for solving the problem]

[0005] In a first aspect, the present application provides a support including a support body having a through hole for exposing a portion of a pole, and a first guide portion provided on the support body for guiding a conductive portion of an electrode assembly to pass through the through hole and connect to the pole.

[0006] In the technical solution of the embodiment of the present application, the support body is provided with a first guide portion, so that during the process of installing the electrode assembly into the battery cell case, the first guide portion can guide and protect the conductive portion of the electrode assembly, allowing the conductive portion of the electrode assembly to gradually enter the through-hole, reducing the probability of the conductive portion colliding with the support body, reducing the risk of failure and damage to the electrode assembly, and improving the reliability and stability of the battery cell.

[0007] In some embodiments, the first guide portion includes a first guide sheet extending at an angle away from the support body, and the first guide sheet is configured to be movable toward the support body by the action of the electrode assembly so as to be pressed between the electrode assembly and the electrode post. In the above technical solution, the first guide sheet, on the one hand, guides the conductive portion of the electrode assembly to pass through the through hole, facilitating connection between the conductive portion and the electrode post and reducing the risk of damage to the conductive portion or failure to mount to the case, which is advantageous for improving the reliability and stability of the battery cell. On the other hand, it serves to isolate the end face of the electrode assembly from the electrode post, further improving the reliability and stability of the battery cell.

[0008] In some embodiments, the first guide sheet is disposed on a first side of the support body in the axial direction of the through hole, and the included angle between the first guide sheet and the first side surface of the support body is 75° or less. The above technical solution reduces the risk of the conductive portion of the electrode assembly directly colliding with one edge of the first guide sheet, reducing the probability of the first guide sheet being pressed and folded or wrinkled. The first guide sheet can better guide the conductive portion of the electrode assembly to gradually enter the through hole, and the first guide sheet can better isolate the end surface of the electrode assembly from the pole, further improving the reliability and stability of the battery cell.

[0009] In some embodiments, the first guide portion further includes a first connection sheet, a first end of the first connection sheet in the first direction connected to the support body, and a second end of the first connection sheet in the first direction extending toward the center of the through hole and connected to the first guide sheet, the first guide sheet being configured to be movable toward the support body by the action of the electrode assembly so as to be crimped between the electrode assembly and the first connection sheet. In the above technical solution, on the one hand, the first guide sheet guides the conductive portion of the electrode assembly to pass through the through hole, facilitating connection between the conductive portion and the electrode post, reducing the risk of damage to the conductive portion or failure to mount to the case, which is advantageous to improving the reliability and stability of the battery cell. On the other hand, the first guide sheet and the first connection sheet serve to isolate the end face of the electrode assembly from the electrode post, further improving the reliability and stability of the battery cell.

[0010] In some embodiments, the first connection sheet and the first guide sheet are integrally molded parts. By integrally molding the first connection sheet and the first guide sheet, the connection reliability between the first connection sheet and the first guide sheet can be ensured, and the connection structure between them can be omitted, which simplifies the processing process of the support body and further improves the production efficiency of the support body.

[0011] In some embodiments, the thicknesses of the first guide sheet and the first connecting sheet are both smaller than the thickness of the support body. On the one hand, the first guide sheet and the first connecting sheet can be easily deformed relative to the support body, reducing the abutting force of the first guide sheet and the first connecting sheet against the electrode assembly, reducing the risk of failure and damage to the electrode assembly and favoring improved reliability and stability of the battery cell. On the other hand, the space occupied by the first guide part in the thickness direction of the support body can be reduced, reducing waste of space inside the case and improving the overall utilization rate of the space inside the case.

[0012] In some embodiments, the first end of the first connection sheet is connected to a first side surface of the support body in the axial direction of the through hole. When the electrode assembly is installed to a predetermined position in the case, at least a portion of the first connection sheet is pressed between the support body and the electrode assembly, reducing the risk of the support body being directly pressed against the end surface of the electrode assembly, reducing the risk of failure and damage to the electrode assembly, and further improving the reliability and stability of the battery cell.

[0013] In some embodiments, the first connecting sheet is located within the through hole, and the first end of the first connecting sheet is connected to the wall of the through hole. By providing the first connecting sheet within the through hole, the space within the through hole can be effectively utilized, the space occupied by the first guide part in the thickness direction of the support body can be reduced, waste of the internal space of the case can be reduced, and the overall utilization rate of the internal space of the case can be improved.

[0014] In some embodiments, there is a gap between two side edges of the first connection sheet that are opposed in the second direction and the wall of the through hole. During the process of installing the electrode assembly into the battery cell case, the first guide sheet can guide the conductive portion to pass through the through hole and at the same time be deformed and pressed against the first connection sheet by the abutting action of the electrode assembly, and then the end faces of the electrode assembly can further abut and deform the first guide sheet and the first connection sheet to accommodate the first guide sheet and the first connection sheet into the through hole, further reducing the space occupied by the first guide portion in the thickness direction of the support body, reducing waste of space inside the case, and further improving the utilization of space inside the case.

[0015] In some embodiments, the support further includes a second guide portion provided on the support body and facing the first guide portion, for guiding the conductive portion of the electrode assembly so that it passes through the through hole and connects to the electrode post. In the above technical solution, by providing the first guide portion and the second guide portion on the support body, at least one of the first guide portion and the second guide portion can guide and protect the conductive portion of the electrode assembly during the process of installing the electrode assembly into the battery cell case, so that the conductive portion of the electrode assembly gradually enters the through hole and the probability of the conductive portion colliding with the support body is reduced, thereby reducing the risk of failure and damage to the electrode assembly and improving the reliability and stability of the battery cell.

[0016] In some embodiments, the second guide portion includes a second guide sheet extending at an angle away from the support body, and the second guide sheet is configured to be movable toward the support body by the action of the electrode assembly so as to be pressed between the electrode assembly and the electrode post. In the above technical solution, the second guide sheet, on the one hand, guides the conductive portion of the electrode assembly to pass through the through hole, facilitating connection between the conductive portion and the electrode post and reducing the risk of damage to the conductive portion or failure to install it in the case, which is advantageous for improving the reliability and stability of the battery cell. On the other hand, it serves to isolate the end face of the electrode assembly from the electrode post, further improving the reliability and stability of the battery cell.

[0017] In some embodiments, a through hole communicating with the through hole is defined between the second guide sheet and the first guide sheet, and the second guide sheet and the first guide sheet extend at an angle in a direction away from the through hole. By providing the first guide sheet and the second guide sheet in this manner, during the process of installing the electrode assembly into the battery cell case, the conductive portion is guided by the first guide sheet or the second guide sheet to enter the through hole first and pass through the through hole more easily, facilitating connection between the conductive portion and the electrode post, reducing the risk of damage to the conductive portion or failure to install into the case, and further improving the reliability and stability of the battery cell.

[0018] In some embodiments, the through hole is an elongated hole, and the first guide sheet and the second guide sheet are provided opposite each other in the width direction of the elongated hole. The shape of the through hole can be matched to the shape of the cross section of the conductive part, so that the guide part can pass through the narrow and long through hole, reducing the risk of failure in attaching the conductive part to the case.

[0019] In some embodiments, the second guide portion further includes a second connection sheet, a first end of the second connection sheet in the first direction connected to the support body, and a second end of the second connection sheet in the first direction extending toward the center of the through hole and connected to the second guide sheet, the second guide sheet being configured to be movable toward the support body by the action of the electrode assembly so as to be crimped between the electrode assembly and the second connection sheet. In the above technical solution, on the one hand, the second guide sheet guides the conductive portion of the electrode assembly to pass through the through hole, facilitating connection between the conductive portion and the electrode post, reducing the risk of damage to the conductive portion or failure to mount to the case, which is advantageous to improving the reliability and stability of the battery cell. On the other hand, the second guide sheet and the second connection sheet serve to isolate the end face of the electrode assembly from the electrode post, further improving the reliability and stability of the battery cell.

[0020] In some embodiments, the structure of the first guide portion and the structure of the second guide portion are the same, which not only makes it easier to process the support body, but also makes it possible to simply align the electrode assembly with the opening in the case body of the case and attach the electrode assembly, eliminating the need to adjust the attachment angle of the electrode assembly multiple times, which is advantageous in improving the attachment efficiency of the electrode assembly.

[0021] In a second aspect, the present application provides a battery cell including: a case having a pole provided thereon, the case including a case body having a case cover and an opening, the case cover being overlaid on the opening; an electrode assembly including a conductive portion and an active material applied portion provided within the case, the conductive portion electrically connecting the active material applied portion and the pole; and the support according to any of the above embodiments, which is provided within the case body and located at one end of the active material applied portion away from the case cover, the pole including a first pole provided on a wall of the case body facing the case cover, the conductive portion including a first conductive portion provided at the one end of the active material applied portion away from the case cover, the first conductive portion passing through the through hole and electrically connected to the first pole, and the first guide portion being located between the active material applied portion and the first pole.

[0022] In the technical solutions of the embodiments of the present application, by using the above-mentioned support, during the process of installing the electrode assembly into the case of the battery cell, the first guide part of the support can guide and protect the conductive part of the electrode assembly, so that the conductive part of the electrode assembly gradually enters the through-hole, reducing the probability that the conductive part will collide with the support body of the support, reducing the risk of failure and damage to the electrode assembly, and improving the reliability and stability of the battery cell.

[0023] In some embodiments, the first pole has a receiving portion, and at least a portion of the first conductive portion is received in the receiving portion and electrically connected to the first pole. The hollow structure of the receiving portion allows, on the one hand, to reduce the weight of the first pole to a certain extent, thereby improving the weight-energy density of the battery cell and the battery. On the other hand, the first conductive portion can be received in the receiving portion, improving the mounting efficiency of the first conductive portion and saving the space occupied by the first conductive portion. This fully utilizes the space of the battery cell, making the fit between the support and the first pole and between the support and the first conductive portion tighter and more reliable, making the battery cell structure more compact, and more advantageous for improving the energy density of the battery cell.

[0024] In some embodiments, the receiving portion includes a first receiving groove, and the surface of the first pole facing the active material coated portion is the pole inner end face, the opening of the first receiving groove is formed in the pole inner end face, and at least a portion of the first conductive portion is received in the first receiving groove. In the above technical solution, on the one hand, by forming the first receiving groove in the first pole, the weight of the first pole can be reduced to some extent, thereby improving the weight-to-energy density of the battery cell and the battery. On the other hand, because the opening of the first receiving groove is formed in the pole inner end face, and the pole inner end face is the surface of the first pole closer to the active material coated portion, the first receiving groove can open toward the active material coated portion, which makes it easier for the first conductive portion to extend into the first receiving groove and improves mounting efficiency. Furthermore, a first receiving groove of this type is easy to process, improving production efficiency. Furthermore, the first receiving groove can be easily processed to have a larger volume, allowing it to accommodate a larger number of first conductive portions. At the same time, because the first accommodating groove is open toward the active material application portion, it can also serve as a buffer and temporary storage structure for the electrolyte, allowing more electrolyte to be accommodated within the case. Because electrolyte is consumed during the charging and discharging process of the battery cell, more electrolyte can extend the service life of the battery cell. Furthermore, because the first accommodating groove is open toward the active material application portion, it can also serve as a buffer structure for gas generated within the electrode assembly, reducing battery cell expansion and improving the reliability and stability of the battery cell. Furthermore, because the first accommodating groove is located inside the first pole, it is difficult for external foreign objects and impurities to enter the first accommodating groove, reducing the impact of external foreign objects and impurities on the electrode assembly. This improves the operational stability and reliability of the electrode assembly, as well as the stability and reliability of the battery cell and battery.

[0025] In some embodiments, the receiving portion includes a second receiving groove, the surface of the first pole away from the active material coated portion is the outer end face of the pole, the groove opening of the second receiving groove is formed in the outer end face of the pole, the second receiving groove communicates with the inside of the case through a via hole, and the first conductive part is inserted into the via hole and at least partially received in the second receiving groove. In the above technical solution, on the one hand, by providing the second receiving groove in the first pole, the weight of the first pole can be reduced to a certain extent, and the weight energy density of the battery cell and the battery can be improved. On the other hand, the opening of the second accommodating groove is formed on the outer end surface of the electrode post, which is the surface away from the active material-coated portion of the first electrode post. Therefore, the second accommodating groove can open in the direction opposite the active material-coated portion. Thus, when at least a portion of the first conductive part is accommodated in the second accommodating groove, the first conductive part can be easily accommodated and organized through the opening of the second accommodating groove. Furthermore, electrical connection between the first conductive part and the first electrode post can also be easily achieved through the opening of the second accommodating groove. This reduces the difficulty of battery cell manufacturing and improves battery cell production efficiency. At the same time, the second accommodating groove can communicate with the interior of the case through via holes. Therefore, the second accommodating groove can also be used as a buffer and temporary storage structure for the electrolyte, allowing more electrolyte to be accommodated within the case. Because electrolyte is consumed during the charging and discharging processes of the battery cell, a larger amount of electrolyte can extend the service life of the battery cell. In addition, since the second accommodating groove can communicate with the inside of the case through the via hole, the second accommodating groove can also be used as a structure for accommodating and buffering gas generated inside the electrode assembly, thereby reducing expansion of the battery cell and improving the reliability and stability of the battery cell.

[0026] In some embodiments, a partial projection of the first guide portion in a plane in which the via hole is located is located within the via hole. In this manner, the first conductive portion passes through the via hole guided by the first guide portion, facilitating connection between the first conductive portion and the first electrode post, further reducing the probability of the first conductive portion colliding with the first electrode post, reducing the risk of failure and damage to the electrode assembly, and improving the reliability and stability of the battery cell.

[0027] In some embodiments, the number of the first electrode posts is two, and two of the through holes are formed in the support body. During the process of fitting the electrode assembly into the battery cell case, the two first guide portions of the support body can simultaneously guide and protect the two first conductive parts of the electrode assembly, and the two first conductive parts can simultaneously enter the through holes at corresponding positions, facilitating the connection between each first conductive part and the first electrode post at the corresponding position, which is advantageous for improving production efficiency.

[0028] In a third aspect, the present application provides a battery including the battery cell of the above embodiment. In the technical solution of the embodiment of the present application, the use of the battery cell can improve the reliability and stability of the battery.

[0029] In a fourth aspect, the present application provides an electrical device including the battery cell of the above embodiment or the battery of the above embodiment. In the technical solution of the embodiment of the present application, the use of the battery or battery cell can improve the reliability and stability of the electrical device.

[0030] The above description is merely a brief description of the technical solution of the present application. In order to make the technical solution of the present application more clearly understood and implemented according to the contents of the specification, and to make the above and other objectives, features and advantages of the present application more comprehensible, specific embodiments of the present application are given below. [Brief explanation of the drawings]

[0031] Various other benefits and advantages will become apparent to those skilled in the art upon review of the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and should not be construed as limiting the present application. Furthermore, like reference numerals refer to like elements throughout the drawings. A description of the drawings follows. [Figure 1] 1 is a structural schematic diagram of a vehicle provided in some embodiments of the present application. [Figure 2]FIG. 1 is an exploded view of the structure of a battery provided in some embodiments of the present application. [Figure 3] FIG. 1 is a perspective view of a battery cell provided in some embodiments of the present application. [Figure 4] 1 is a structural cross-sectional view of a battery cell provided in some embodiments of the present application. [Figure 5] 1 is a structural schematic diagram of a support provided in some examples of the present application. [Figure 6] 1 is a structural cross-sectional view of a battery cell provided in some embodiments of the present application. [Figure 7] FIG. 7 is an enlarged view of the battery cell shown in FIG. [Figure 8] 1 is a structural schematic diagram of a support provided in some other examples of the present application. [Figure 9] 1 is a structural schematic diagram of a support provided in some other examples of the present application. [Figure 10] 10A and 10B are structural cross-sectional views of battery cells provided in some other embodiments of the present application. [Figure 11] FIG. 11 is an enlarged view of the battery cell shown in FIG. [Figure 12] 1 is a structural schematic diagram of a support provided in some other examples of the present application. [Figure 13] 1 is a partial cross-sectional schematic view of a battery cell provided in some embodiments of the present application. [Figure 14] 1 is a partial cross-sectional schematic view of a battery cell provided in some embodiments of the present application. [Figure 15] 1 is a partial cross-sectional schematic view of a battery cell provided in some embodiments of the present application. [Figure 16] 1 is a partial cross-sectional schematic view of a battery cell provided in some embodiments of the present application. [Figure 17] 1 is a partial cross-sectional schematic view of a battery cell provided in some embodiments of the present application. [Figure 18] 1 is a partial cross-sectional schematic view of a battery cell provided in some embodiments of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0032] Hereinafter, the embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly explain the technical solution of the present application, and are merely examples, which should not limit the protection scope of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are merely for the purpose of describing specific examples and are not intended to limit this application. The terms "comprises," "having," and any variations thereof in the specification, claims, and description of the drawings of this application are intended to be non-exclusive.

[0034] In the description of the examples of this application, technical terms such as "first," "second," etc. are merely used to distinguish different objects, and should not be understood as indicating or implying relative importance, or implying the number, specific order, or primary and secondary relationship of the technical features shown. In the description of the examples of this application, unless otherwise clearly and specifically limited, "plurality" means two or more.

[0035] When an "embodiment" is described herein, it means that a particular feature, structure, or characteristic described by the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to an embodiment that is exclusively independent of or alternative to other embodiments. It is understood by those skilled in the art, either explicitly or implicitly, that the embodiments described herein may be combined with other embodiments. In describing the embodiments of the present application, the term "and / or" is merely used to describe the relationship between related objects and indicates that a three-way relationship may exist. For example, A and / or B can represent the cases where A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the symbol " / " in this specification generally means that the related objects before and after it are in an "or" relationship.

[0036] In the description of the examples of the present application, the term "plurality" refers to two or more (including two); similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple sheets" refers to two or more sheets (including two sheets). In the description of the examples of the present application, orientations or positional relationships indicated by technical terms such as "center," "length," "width," "thickness," "upper," "lower," "bottom," "inner," "outer," and "axial direction" are orientations or positional relationships shown based on the drawings, and are intended merely to facilitate explanation of the examples of the present application and simplify the description. They do not explicitly or implicitly indicate that the indicated devices or elements necessarily have a specific orientation, are configured in a specific orientation, and are operated in a specific orientation, and therefore should not be understood as limiting the examples of the present application.

[0037] In describing the embodiments of the present application, unless otherwise clearly defined or limited, the terms "attach," "couple," "connect," "fix," etc. should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection. They may be mechanical or electrical connections. They may be direct connections, indirect connections via an intermediate medium, or internal communication between two elements or an interactive relationship between two elements. Those skilled in the art will be able to understand the specific meanings of the above terms in this specification according to specific circumstances.

[0038] Currently, in view of the development of the market situation, the applications of power batteries are expanding. Power batteries are not only widely used in energy storage power supply systems such as hydroelectric power, thermal power, wind power and solar power plants, but also in various fields such as electric transportation means such as electric bicycles, electric motorcycles and electric cars, military equipment and aerospace. With the expansion of the application fields of power batteries, the market demand is also increasing.

[0039] In the battery cells of the related art, the battery cell case is provided with poles, and when the battery cell is installed, an electrode assembly having a conductive portion is typically installed into the case through an opening in the case body. However, during the process of installing the electrode assembly into the case through the opening, the conductive portion is likely to collide with the case or other structures inside the case, resulting in damage to the conductive portion or failure to install properly in the case, which affects the reliability of the battery cell.

[0040] In order to reduce the risk of the case or other structures within the case damaging the conductive part during the process of installing the electrode assembly within the case, the present application provides a first guide part on the support body within the case. During the process of installing the electrode assembly within the case, the first guide part can guide and protect the conductive part of the electrode assembly, allowing the conductive part of the electrode assembly to gradually enter the through hole, reducing the probability of the conductive part colliding with the support body, reducing the risk of failure and damage to the electrode assembly, and improving the reliability and stability of the battery cell.

[0041] The battery cells disclosed in the embodiments of the present application can be used in various electric devices that use batteries as a power source or energy storage systems that use batteries as an energy storage element. The electric devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric motorcycles, electric cars, boats, aircraft, etc. Here, the electric toys may include, for example, game consoles, electric car toys, electric boat toys, and electric plane toys, and other stationary or mobile electric toys, and the aircraft may include airplanes, rockets, space shuttles, spaceships, etc.

[0042] For convenience of explanation, the following embodiment will be described by taking a vehicle as an example of the electric device 1000 according to an embodiment of the present application.

[0043] Referring to FIG. 1, FIG. 1 is a structural schematic diagram of a vehicle provided in some embodiments of the present application. The vehicle may be a fuel vehicle, a natural gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, a range-extender vehicle, etc. A battery 100 is provided inside the vehicle, and may be provided at the bottom, front, or rear of the vehicle. The battery 100 is used to supply power to the vehicle, for example, the battery 100 can be the operating power source for the vehicle. The vehicle may further include a controller 200 and a motor 300, where the controller 200 controls the battery 100 to supply power to the motor 300, for example, for vehicle startup, navigation, and running power needs during driving.

[0044] In some embodiments of the present application, the battery 100 not only serves as a power source for operating the vehicle, but also as a power source for driving the vehicle, replacing all or part of gasoline or natural gas, to provide driving power to the vehicle.

[0045] Referring to FIG. 2, FIG. 2 is an exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box 20 and battery cells 10 housed in the box 20. The box 20 provides a storage space for the battery cells 10 and may have various structures. In some embodiments, the box 20 may include a first portion 201 and a second portion 202 that, when stacked together, define a storage space for housing the battery cells 10. The second portion 202 may have a hollow structure with an open end, and the first portion 201 may have a plate-like structure. The first portion 201 may be stacked on the open side of the second portion 202, thereby defining the storage space. The first portion 201 and the second portion 202 may both have a hollow structure with an open end, and the open side of the first portion 201 may be stacked on the open side of the second portion 202. Of course, the box 20 formed by the first portion 201 and the second portion 202 may have various shapes, such as a cylindrical shape, a rectangular parallelepiped shape, or the like.

[0046] The battery 100 may include multiple battery cells 10, and the multiple battery cells 10 may be connected in series, parallel, or a mixed connection. A mixed connection refers to both serial and parallel connections among the multiple battery cells 10. The multiple battery cells 10 may be directly connected in series, parallel, or a mixed connection, and then housed in the box 20 as a whole. Of course, the battery 100 may also be formed by connecting multiple battery cells 10 in series, parallel, or a mixed connection to form a battery 100 module, and then integrating the multiple battery 100 modules in series, parallel, or a mixed connection and housing them in the box 20. The battery 100 may further include other structures. For example, the battery 100 may further include current collecting members for achieving electrical connection between the multiple battery cells 10. Here, each battery cell 10 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cells 10 may be cylindrical, flat, rectangular, or have other shapes.

[0047] 3 and 4, FIG. 3 is a schematic exploded structural view of a battery cell 10 provided in some embodiments of the present application. FIG. 4 is a structural cross-sectional view of a battery cell 10 provided in some embodiments of the present application. The battery cell 10 refers to the smallest constituent unit of a battery 100. As shown in FIG. 3, the X direction in the drawing is the length direction of the battery cell 10, the Y direction is the thickness direction of the battery cell 10, and the Z direction is the height direction of the battery cell 10. The battery cell 10 includes a case 11, an electrode assembly 2, a support 3, and other functional components. The case 11 includes a case cover 112 and a case body 111.

[0048] The case cover 112 refers to a member that fits over the opening 1110 of the case body 111 and isolates the internal environment of the battery cell 10 from the external environment. The shape of the case cover 112 may be adapted to match the shape of the case body 111. Optionally, the case cover 112 may be made of a material (e.g., aluminum alloy) with a certain degree of hardness and strength so as to be less likely to deform when pressed or hit. This can provide the battery cell 10 with higher structural strength and improve reliability to a certain extent. The case cover 112 may be provided with functional members such as electrode terminals. The electrode terminals can be electrically connected to the electrode assembly 2 and used to output or input electrical energy to or from the battery cell 10. In some embodiments, the case cover 112 may be provided with a pressure release mechanism that releases internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The case cover 112 may be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic, but is not particularly limited thereto in the embodiments of the present application. In some embodiments, an insulating member may be further provided inside the case cover 112, which can be used to isolate the electrical connection members in the case body 111 from the case cover 112 to reduce the risk of short circuits. For example, the insulating member may be plastic, rubber, etc.

[0049] The case body 111, together with the case cover 112, is a component for forming an internal environment of the battery cell 10. The formed internal environment can be used to accommodate the electrode assembly 2, an electrolyte, and other components. The case body 111 and the case cover 112 may be independent components, or the case body 111 may have an opening 1110, and the case cover 112 may be placed over the opening 1110 to form the internal environment of the battery cell 10. The case cover 112 and the case body 111 may be integrated, but are not limited to this. Specifically, before other components are enclosed, a common connection surface may be formed between the case cover 112 and the case body 111, and when it is necessary to seal the interior of the case body 111, the case cover 112 may be placed over the case body 111. The case body 111 may have various shapes and sizes, such as a rectangular parallelepiped, cylindrical, or hexagonal prism. Specifically, the shape of the case body 111 may be determined according to the specific shape and size of the electrode assembly 2. The case body 111 may be made of various materials such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., but is not particularly limited thereto in the embodiments of the present application.

[0050] The electrode assembly 2 is a component that undergoes an electrochemical reaction in the battery cell 10. The case body 111 may include one or more electrode assemblies 2. The electrode assembly 2 is typically formed by winding or stacking a positive electrode sheet and a negative electrode sheet, with a separator typically being provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive electrode sheet and the negative electrode sheet that contain active material form the main body of the electrode assembly 2, and the portions of the positive electrode sheet and the negative electrode sheet that do not contain active material form tabs, respectively. The positive electrode tab and the negative electrode tab may be located at the same end of the main body, or may be located at opposite ends of the main body. During charging and discharging of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current circuit.

[0051] The support 3 is provided in the case body 111, and is located at one end of the active material application part 21 that is remote from the case cover 112. Here, the support 3 may have a plate-like structure, the support 3 may be provided on the side of the active material application part 21 that has the conductive part 22, the support 3 may be provided with an avoidance structure for avoiding the conductive part 22 (for example, an avoidance groove or a through-hole 30 described later, etc.), and the support 3 may be provided on the side of the active material application part 21 that does not have the conductive part 22, and in this way, there is no need to provide the support 3 with an avoidance structure for avoiding the conductive part 22.

[0052] 5, which is a structural schematic diagram of the support 3 provided in some embodiments of the present application. The support 3 includes a support body 31 having a through-hole 310 for exposing a portion of the electrode post 12, and a first guide portion 32 provided on the support body 31 to guide the conductive portion 22 of the electrode assembly 2 to pass through the through-hole 310 and facilitate connection between the conductive portion 22 and the electrode post 12.

[0053] In the technical solution of the embodiment of the present application, the support body 31 is provided with the first guide portion 32, so that during the process of installing the electrode assembly 2 into the case 11 of the battery cell 10, the first guide portion 32 can guide and protect the conductive portion 22 of the electrode assembly 2. The conductive portion 22 of the electrode assembly 2 gradually enters the through-hole 310, reducing the probability of the conductive portion 22 colliding with the support body 31. This reduces the risk of failure and damage to the electrode assembly 2, and improves the reliability and stability of the battery cell 10.

[0054] Referring again to Fig. 5 and further to Figs. 6 and 7, Fig. 6 is a structural cross-sectional view of a battery cell 10 provided in some embodiments of the present application. Fig. 7 is an enlarged view of the battery cell 10 shown in Fig. 6. The first guide portion 32 includes a first guide sheet 321 that extends obliquely in a direction away from the support body 31. The first guide sheet 321 is configured to be movable in a direction approaching the support body 31 by the action of the electrode assembly 2 so as to be pressed between the electrode assembly 2 and the pole 12.

[0055] Specifically, in the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the electrode assembly 2 moves in a direction approaching the support body 3, and when the conductive portion 22 comes into contact with the first guide sheet 321, the conductive portion 22 enters the through hole 310 under the guidance of the first guide sheet 321, and finally passes through the through hole 310, facilitating connection between the conductive portion 22 and the pole 12. This reduces the probability of the conductive portion 22 colliding with the support body 31 and reduces the risk of damage to the conductive portion 22 or failure to install the conductive portion 22 in the case.

[0056] Furthermore, during the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the first guide sheet 321 moves toward the support body 31 due to the action of the electrode assembly 2, and when the electrode assembly 2 is installed to the intended position within the case 11, the first guide sheet 321 does not need to be pulled out and is pressed between the electrode assembly 2 and the pole 12, isolating the end face of the electrode assembly 2 from the pole 12, which is advantageous for improving the reliability and stability of the battery cell 10.

[0057] In the above technical solution, the first guide sheet 321, on the one hand, can guide the conductive portion 22 of the electrode assembly 2 to pass through the through-hole 310, facilitating the connection between the conductive portion 22 and the electrode post 12, reducing the risk of damage to the conductive portion 22 or failure to install it in the case, and is beneficial to improving the reliability and stability of the battery cell 10. On the other hand, it can serve to isolate the end face of the electrode assembly 2 from the electrode post 12, further improving the reliability and stability of the battery cell 10.

[0058] 7, the first guide sheet 321 is disposed on a first side in the axial direction of the through-hole 310 of the support body 31, and the included angle α1 between the first guide sheet 321 and the first side surface 3121 of the support body 31 is 75° or less. For example, the included angle α between the first guide sheet 321 and the first side surface 3121 of the support body 31 may be 75°, 60°, 45°, 30°, 10°, etc.

[0059] Here, "the axial direction of the through hole 310" refers to a direction perpendicular to the plane in which the through hole 310 is located, i.e., the Z direction shown in Fig. 7. The support body 31 has a first side surface 3121 and a second side surface 3122 that are provided opposite each other in the axial direction of the through hole 310, and the first guide sheet 321 is provided on the first side surface 3121 of the support body 31.

[0060] The above technical solution reduces the risk of the conductive portion 22 of the electrode assembly 2 directly colliding with one edge of the first guide sheet 321, and reduces the probability of the first guide sheet 321 being pressed and folded or wrinkled. The first guide sheet 321 can better guide the conductive portion 22 of the electrode assembly 2 so that it gradually enters the through-hole 310. The first guide sheet 321 can also better isolate the end face of the electrode assembly 2 from the pole 12, further improving the reliability and stability of the battery cell 10.

[0061] 5 to 7 again, the first guide part 32 further includes a first connection sheet 322, which has a first end and a second end arranged opposite to each other in the first direction, the first end of the first connection sheet 322 in the first direction being connected to the support body 31, the second end of the first connection sheet 322 in the first direction extending toward the center position of the through-hole 310, and the second end of the first connection sheet 322 in the first direction being connected to the first guide sheet 321. The first guide sheet 321 is configured to be movable in a direction approaching the support body 31 by the action of the electrode assembly 2 so as to be pressed between the electrode assembly 2 and the first connection sheet 322.

[0062] During the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the first guide sheet 321 moves toward the support body 31 due to the action of the electrode assembly 2. When the electrode assembly 2 is installed to the intended position in the case 11, the first guide sheet 321 does not need to be pulled out but is instead pressed between the electrode assembly 2 and the first connecting sheet 322, and the first connecting sheet 322 is pressed between the first guide sheet 321 and the electrode post 12. The first guide sheet 321 and the first connecting sheet 322 provide doubly insulating the end face of the electrode assembly 2 from the electrode post 12, further improving the reliability and stability of the battery cell 10.

[0063] In the above technical solution, on the one hand, the first guide sheet 321 can guide the conductive portion 22 of the electrode assembly 2 to pass through the through-hole 310, facilitating the connection between the conductive portion 22 and the electrode post 12, reducing the risk of damage to the conductive portion 22 or failure to install it in the case, and contributing to improving the reliability and stability of the battery cell 10. On the other hand, the first guide sheet 321 and the first connection sheet 322 can serve to isolate the end face of the electrode assembly 2 from the electrode post 12, further improving the reliability and stability of the battery cell 10.

[0064] Here, the dimension of the first guide sheet 321 in the first direction is smaller than the dimension of the first connecting sheet 322 in the first direction, so that the first end of the first guide sheet 321 close to the first connecting sheet 322 avoids the support body 31 as much as possible, thereby reducing the space occupied by the first guide part 32 in the thickness direction of the support body 31, reducing waste of the internal space of the case 11, and improving the overall utilization rate of the internal space of the case 11.

[0065] As an alternative solution, first connecting sheet 322 and first guide sheet 321 are integrally molded parts. By integrally molding first connecting sheet 322 and first guide sheet 321, it is possible to ensure the reliability of the connection between first connecting sheet 322 and first guide sheet 321 and also to omit the connection structure between them, which simplifies the processing steps for support body 3 and further improves the production efficiency of support body 3.

[0066] Here, the thicknesses of the first guide sheet 321 and the first connecting sheet 322 are both smaller than the thickness of the support body 31. On the one hand, the first guide sheet 321 and the first connecting sheet 322 can be easily deformed relative to the support body 31, which reduces the abutting force of the first guide sheet 321 and the first connecting sheet 322 against the electrode assembly 2, thereby reducing the risk of failure and damage to the electrode assembly 2 and improving the reliability and stability of the battery cell 10. On the other hand, the space occupied by the first guide part 32 in the thickness direction of the support body 31 can be reduced, which improves the overall utilization rate of the internal space of the case 11.

[0067] 7 , a first end of the first connecting sheet 322 is connected to a first side surface 3121 in the axial direction of the through-hole 310 of the support body 31. When the electrode assembly 2 is attached to a predetermined position within the case 11, at least a portion of the first connecting sheet 322 is pressed between the support body 31 and the electrode assembly 2, reducing the risk of the support body 31 being pressed directly against the end surface of the electrode assembly 2, reducing the risk of failure or damage to the electrode assembly 2, and further improving the reliability and stability of the battery cell 10.

[0068] Please refer to Figure 8, which is a structural schematic diagram of the support body 3 provided in some other embodiments of the present application. The first connecting sheet 322 is located within the through-hole 310, and a first end of the first connecting sheet 322 is connected to the wall of the through-hole 310. The space within the through-hole 310 is effectively utilized, reducing the space occupied by the first guide part 32 in the thickness direction of the support body 31, reducing waste of the internal space of the case 11, and improving the overall utilization rate of the internal space of the case 11.

[0069] Here, there is a gap between two side edges of first connection sheet 322 arranged opposite to each other in the second direction and the hole wall of through hole 310. A first end of first connection sheet 322 in the first direction is connected to support body 31, and a second end of first connection sheet 322 in the first direction is connected to first guide sheet 321, and there is a gap between the opposing sides of first connection sheet 322 in the second direction and the hole wall of through hole 310. Therefore, first connection sheet 322 can form a cantilever structure with one end being a fixed end and the other end being a free end, and in this way first connection sheet 322 can be deformed by external forces.

[0070] Specifically, during the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the first guide sheet 321 guides the conductive portion 22 to pass through the through hole 310, and at the same time, is deformed by the abutting action of the electrode assembly 2 and pressed against the first connecting sheet 322. Thereafter, the end face of the electrode assembly 2 further abuts and deforms the first guide sheet 321 and the first connecting sheet 322, allowing the first guide sheet 321 and the first connecting sheet 322 to be accommodated in the through hole 310. This further reduces the space occupied by the first guide portion 32 in the thickness direction of the support body 31, reduces waste of the internal space of the case 11, and further improves the utilization rate of the internal space of the case 11.

[0071] 9, which is a structural schematic diagram of a support 3 provided in some other embodiments of the present application. The support 3 further includes a second guide portion 33 disposed on a support body 31 and facing the first guide portion 32. The second guide portion 33 guides the conductive portion 22 of the electrode assembly 2 to pass through the through-hole 310 and facilitates connection between the conductive portion 22 and the electrode post 12. In the above technical solution, by providing the first guide portion 32 and the second guide portion 33 on the support body 31, at least one of the first guide portion 32 and the second guide portion 33 can guide and protect the conductive portion 22 of the electrode assembly 2 during installation of the electrode assembly 2 into the case 11 of the battery cell 10. This allows the conductive portion 22 of the electrode assembly 2 to gradually enter the through-hole 310, reducing the probability of the conductive portion 22 colliding with the support body 31. This reduces the risk of failure and damage to the electrode assembly 2 and improves the reliability and stability of the battery cell 10.

[0072] 9 and further refer to FIGS. 10 and 11. FIG. 10 is a structural cross-sectional view of a battery cell 10 provided in some other embodiments of the present application. FIG. 11 is an enlarged view of the battery cell 10 shown in FIG. 10. The second guide portion 33 includes a second guide sheet 331 that extends obliquely in a direction away from the support body 31.

[0073] The second guide sheet 331 is configured to be movable toward the support body 31 by the action of the electrode assembly 2 so as to be crimped between the electrode assembly 2 and the electrode post 12. Specifically, during the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the electrode assembly 2 moves toward the support body 3, and when the conductive portion 22 comes into contact with at least one of the first guide sheet 321 and the second guide sheet 331, the conductive portion 22 is guided by the first guide sheet 321 or the second guide sheet 331 into the through hole 310 and finally passes through the through hole 310, facilitating connection between the conductive portion 22 and the electrode post 12. This reduces the probability of the conductive portion 22 colliding with the support body 31 and reduces the risk of damage to the conductive portion 22 or failure to install the conductive portion 22 in the case.

[0074] Furthermore, during the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the first guide sheet 321 and the second guide sheet 331 can move in a direction approaching the support body 31 due to the action of the electrode assembly 2. Once the electrode assembly 2 has been installed to the intended position in the case 11, the first guide sheet 321 and the second guide sheet 331 do not need to be pulled out, but are instead pressed between the electrode assembly 2 and the pole 12, thereby isolating the end face of the electrode assembly 2 from the pole 12, which is advantageous for improving the reliability and stability of the battery cell 10.

[0075] In the above technical solution, the second guide sheet 331, on the one hand, can guide the conductive portion 22 of the electrode assembly 2 to pass through the through-hole 310, facilitating the connection between the conductive portion 22 and the electrode post 12, reducing the risk of damage to the conductive portion 22 or failure to install it in the case, and is beneficial to improving the reliability and stability of the battery cell 10. On the other hand, it can serve to isolate the end face of the electrode assembly 2 from the electrode post 12, further improving the reliability and stability of the battery cell 10.

[0076] Referring again to Figure 11, a through hole 30 communicating with the through hole 310 is defined between the second guide sheet 331 and the first guide sheet 321, and the second guide sheet 331 and the first guide sheet 321 extend at an angle in a direction away from the through hole 30.

[0077] By providing the first guide sheet 321 and the second guide sheet 331 in this manner, during the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the conductive portion 22 is guided by the first guide sheet 321 or the second guide sheet 331 to enter the through hole 30 first and pass through the through hole 310 more easily, facilitating the connection between the conductive portion 22 and the electrode post 12, reducing the risk of damage to the conductive portion 22 or failure to install it in the case, and further improving the reliability and stability of the battery cell 10.

[0078] Specifically, the included angle α1 between the first guide sheet 321 and the first side surface 3121 of the support body 31 is 75° or less. For example, the included angle α between the first guide sheet 321 and the first side surface 3121 of the support body 31 may be 75°, 60°, 45°, 30°, 10°, etc. The included angle α2 between the second guide sheet 331 and the first side surface 3121 of the support body 31 is 75° or less. For example, the included angle α2 between the second guide sheet 331 and the first side surface 3121 of the support body 31 may be 75°, 60°, 45°, 30°, 10°, etc.

[0079] The above technical solution reduces the risk of the conductive portion 22 of the electrode assembly 2 directly colliding with one edge of the first guide sheet 321 and the second guide sheet 331, and reduces the probability of the first guide sheet 321 and the second guide sheet 331 being pressed and folded or wrinkled. The first guide sheet 321 and the second guide sheet 331 can perform a better guiding function to ensure that the conductive portion 22 of the electrode assembly 2 gradually enters the through hole 310. The first guide sheet 321 and the second guide sheet 331 can also better isolate the end face of the electrode assembly 2 from the pole 12, further improving the reliability and stability of the battery cell 10.

[0080] Here, through hole 30 is an elongated hole, and first guide sheet 321 and second guide sheet 331 are provided opposite each other in the width direction of the elongated hole. The shape of through hole 30 can be made to match the shape of the cross section of conductive part 22, which allows the guide part to pass through narrow and long through hole 30, reducing the risk of failure in attaching conductive part 22 to the case.

[0081] Referring again to Figures 9 to 11, the second guide portion 33 further includes a second connecting sheet 332, a first end of the second connecting sheet 332 in the first direction is connected to the support body 31, a second end of the second connecting sheet 332 in the first direction extends toward the center position of the through hole 310, and the second connecting sheet 332 is connected to the second guide sheet 331.

[0082] The second guide sheet 331 is configured to be movable toward the support body 31 by the action of the electrode assembly 2 so as to be crimped between the electrode assembly 2 and the second connection sheet 332. During the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the second guide sheet 331 moves toward the support body 31 by the action of the electrode assembly 2. Once the electrode assembly 2 is installed to the desired position in the case 11, the second guide sheet 331 does not need to be pulled out and is crimped between the electrode assembly 2 and the second connection sheet 332, and the second connection sheet 332 is crimped between the second guide sheet 331 and the electrode post 12. The second guide sheet 331 and the second connection sheet 332 provide doubly isolated end faces of the electrode assembly 2 from the electrode post 12, further improving the reliability and stability of the battery cell 10.

[0083] In the above technical solution, on the one hand, the second guide sheet 331 can guide the conductive portion 22 of the electrode assembly 2 to pass through the through-hole 310, facilitating the connection between the conductive portion 22 and the electrode post 12, reducing the risk of damage to the conductive portion 22 or failure to install it in the case, and contributing to improving the reliability and stability of the battery cell 10. On the other hand, the second guide sheet 331 and the second connection sheet 332 can function to isolate the end face of the electrode assembly 2 from the electrode post 12, further improving the reliability and stability of the battery cell 10.

[0084] Referring again to Figures 9 and 11, the fact that the structure of the first guide portion 32 and the structure of the second guide portion 33 are the same not only makes it easier to process the support body 3, but also means that it is only necessary to align the electrode assembly 2 with the opening 1110 of the case body 111 of the case 11 and attach the electrode assembly 2, eliminating the need to adjust the attachment angle of the electrode assembly 2 multiple times, which is advantageous in improving the attachment efficiency of the electrode assembly 2.

[0085] Here, the thicknesses of the second guide sheet 331 and the second connecting sheet 332 are both smaller than the thickness of the support body 31. On the one hand, the second guide sheet 331 and the second connecting sheet 332 can be easily deformed relative to the support body 31, which reduces the abutting force of the second guide sheet 331 and the second connecting sheet 332 against the electrode assembly 2, thereby reducing the risk of failure and damage to the electrode assembly 2 and improving the reliability and stability of the battery cell 10. On the other hand, the space occupied by the second guide part 33 in the thickness direction of the support body 31 can be reduced, which reduces waste of the internal space of the case 11 and improves the overall utilization rate of the internal space of the case 11.

[0086] 11 , a first end of the second connecting sheet 332 is connected to a first side surface 3121 in the axial direction of the through-hole 310 of the support body 31. When the electrode assembly 2 is attached to a predetermined position within the case 11, at least a portion of the second connecting sheet 332 is pressed between the support body 31 and the electrode assembly 2, reducing the risk of the support body 31 being pressed directly against the end surface of the electrode assembly 2, reducing the risk of failure or damage to the electrode assembly 2, and further improving the reliability and stability of the battery cell 10.

[0087] 12, which is a structural schematic diagram of the support 3 provided in some other embodiments of the present application. The second connecting sheet 332 is located within the through hole 310, and a first end of the second connecting sheet 332 is connected to the wall of the through hole 310. By providing the second connecting sheet 332 within the through hole 310, the space within the through hole 310 is effectively utilized, reducing the space occupied by the second guide part 33 in the thickness direction of the support body 31, reducing waste of the internal space of the case 11, and improving the overall utilization rate of the internal space of the case 11.

[0088] Here, there is a gap between the two side edges of second connection sheet 332 that are arranged opposite each other in the second direction and the hole wall of through hole 310. A first end of second connection sheet 332 in the first direction is connected to support body 31, and a second end of second connection sheet 332 in the first direction is connected to second guide sheet 331, and there is a gap between the opposing sides of second connection sheet 332 in the second direction and the hole wall of through hole 310. Therefore, second connection sheet 332 can form a cantilever structure with one end being a fixed end and the other end being a free end, and in this way second connection sheet 332 can be deformed by external forces.

[0089] Specifically, in the process of installing the electrode assembly 2 in the case 11 of the battery cell 10, the second guide sheet 331 guides the conductive portion 22 to pass through the through hole 310, and at the same time, the second guide sheet 331 is deformed by the abutting action of the electrode assembly 2 and pressed against the second connecting sheet 332. Thereafter, the end face of the electrode assembly 2 further abuts and deforms the second guide sheet 331 and the second connecting sheet 332, allowing the second guide sheet 331 and the second connecting sheet 332 to be accommodated in the through hole 310. This further reduces the space occupied by the second guide portion 33 in the thickness direction of the support body 31, reduces waste of the internal space of the case 11, and further improves the utilization rate of the internal space of the case 11.

[0090] 5, 8-9, and 12, the support body 31 may further be provided with a vent hole 311, which may be provided directly opposite the explosion-proof valve of the battery cell 10. In an alternative solution, the vent hole 311 is located in the middle of the support body 31 in the longitudinal direction (X direction in the drawings), and two through holes 310 are provided in the support body 31, which are arranged in the longitudinal direction of the support body 31 and located on both sides of the vent hole 311.

[0091] Referring again to Figures 3 and 4, the present application provides a battery cell 10 including a case 11 provided with a pole 12, and an electrode assembly 2 including a conductive portion 22 and an active material application portion 21 provided within the case 11, the conductive portion 22 electrically connecting the active material application portion 21 and the pole 12.

[0092] The battery cell 10 further includes a support 3 in any of the above embodiments that is provided in the case body 111 and located at one end of the active material application section 21 that is remote from the case cover 112 .

[0093] Here, the pole 12 includes a first pole 120 provided on a wall facing the case cover 112 of the case body 111, the conductive portion 22 includes a first conductive portion 221 provided at one end of the active material application portion 21 away from the case cover 112, the first conductive portion 221 passing through the through hole 310 and electrically connected to the first pole 120, and the first guide portion 32 is located between the active material application portion 21 and the first pole 120.

[0094] In the technical solution of the embodiment of the present application, by adopting the above-mentioned support body 3, during the process of installing the electrode assembly 2 into the case 11 of the battery cell 10, the first guide portion 32 of the support body 3 can guide and protect the conductive portion 22 of the electrode assembly 2, so that the conductive portion 22 of the electrode assembly 2 gradually enters the through-hole 310, reducing the probability that the conductive portion 22 will collide with the support body 31 of the support body 3. This reduces the risk of failure and damage to the electrode assembly 2 and improves the reliability and stability of the battery cell 10.

[0095] 13 and 14, Fig. 13 is a partial cross-sectional view of a battery cell 10 provided in some embodiments of the present application. Fig. 14 is a partial cross-sectional view of a battery cell 10 provided in some embodiments of the present application. The first electrode post 120 is provided with a receiving portion 121, and at least a portion of the first conductive portion 221 is received in the receiving portion 121, and the first conductive portion 221 is electrically connected to the first electrode post 120. In other words, the first electrode post 120 has a hollow structure.

[0096] Here, the term "at least a portion" means that the entire first conductive part 221 may be accommodated in the accommodating part 121, or that only a portion of the first conductive part 221 may be accommodated in the accommodating part 121. Because the first electrode post 120 has the accommodating part 121, the hollow structure of the accommodating part 121 can, on the one hand, reduce the weight of the first electrode post 120 to a certain extent, thereby improving the weight-energy density of the battery cell 10 and the battery 100; and, on the other hand, the first conductive part 221 can be accommodated in the accommodating part 121, which improves the mounting efficiency of the first conductive part 221 and also saves the space occupied by the first conductive part 221, fully utilizes the space of the battery cell 10, and makes the fit between the support 3 and the first electrode post 120 and between the support 3 and the first conductive part 221 tighter and more reliable, making the structure of the battery cell 10 more compact and more advantageous for improving the energy density of the battery cell 10.

[0097] More specifically, by accommodating a part or all of the first conductive part 221 within the accommodation part 121, the part of the first conductive part 221 located within the accommodation part 121 can occupy space within the first electrode post 120, thereby reducing the space occupied by the first conductive part 221 within the case 11. For a given size of the case 11, this can save some space within the case 11, allowing a larger-sized active material-coated part 21 to be accommodated, thereby improving the volumetric energy density of the battery cell 10. For example, by extending the first conductive part 221 from the side of the active material-coated part 21 closer to the first electrode post 120, the space occupied by the first conductive part 221 between the active material-coated part 21 and the first electrode post 120 can be saved. This increases the size of the active material-coated part 21 in the direction in which the first conductive part 221 is extended, thereby reducing the distance between the active material-coated part 21 and the first electrode post 120, thereby improving the energy density of the battery cell 10.

[0098] At the same time, by accommodating at least a portion of the first conductive part 221 within the accommodating part 121, the space occupied by the battery cell 10 itself can be reduced, allowing more battery cells 10 to be accommodated in the same volume of the battery 100, and increasing the volumetric energy density of the battery 100. Furthermore, by accommodating at least a portion of the first conductive part 221 within the accommodating part 121 and occupying the space within the first electrode post 120, the redundancy of the first conductive part 221 within the case 11 can be reduced to at least some extent, reducing the probability of a short circuit between the drop first conductive part 221 and the active material coated part 21, reducing the probability of a short circuit within the battery cell 10, and improving the operational reliability and stability of the battery cell 10 and the battery 100.

[0099] It should be noted that in the embodiments of the present application, the location of the accommodating portion 121 may be on the side of the first pole 120 facing the active material application portion 21, or may be on the side opposite to the active material application portion 21 of the first pole 120.

[0100] For example, referring again to Figures 13 and 14, when the accommodating portion 121 is located on the side of the first pole 120 facing the active material application portion 21, the accommodating portion 121 includes a first accommodating groove 12110, the surface of the first pole 120 facing the active material application portion 21 is the pole inner end surface 122, the groove opening of the first accommodating groove 12110 is formed in the pole inner end surface 122, and at least a portion of the first conductive portion 221 is accommodated in the first accommodating groove 12110.

[0101] For example, the first accommodating groove 12110 is a groove body, and the groove body has a groove-like structure with a certain depth. For example, if the first electrode post 120 is installed on the upper end wall of the case 11 and the electrode post inner end surface 122 is the lower surface of the first electrode post 120, the first accommodating groove 12110 is formed as an accommodating groove with a groove opening downward and groove walls recessed upward. Also, for example, if the first electrode post 120 is installed on the lower end wall of the case 11 and the electrode post inner end surface 122 is the upper surface of the first electrode post 120, the first accommodating groove 12110 is formed as an accommodating groove with a groove opening upward and groove walls recessed downward.

[0102] In the above technical solution, on the one hand, by opening the first accommodating groove 12110 in the first electrode post 120, the weight of the first electrode post 120 can be reduced to a certain extent, thereby improving the weight-energy density of the battery cell 10 and the battery 100. On the other hand, the groove opening of the first accommodating groove 12110 is formed in the electrode post inner end surface 122, which is the surface of the first electrode post 120 closer to the active material coated portion 21. Therefore, the first accommodating groove 12110 can open toward the active material coated portion 21. This allows the first conductive portion 221 to easily extend into the first accommodating groove 12110, improving mounting efficiency. Furthermore, the first accommodating groove 12110 of this type is easy to process, improving production efficiency.

[0103] Furthermore, the first accommodating groove 12110 can be easily machined to have a larger volume, allowing it to accommodate a larger number of first conductive parts 221. At the same time, because the first accommodating groove 12110 opens toward the active material application portion 21, it can also be used as a buffer and temporary storage structure for the electrolyte, allowing it to accommodate a larger amount of electrolyte within the case 11. Because the electrolyte is consumed during the charging and discharging process of the battery cell 10, a larger amount of electrolyte can extend the service life of the battery cell 10. Because the first accommodating groove 12110 opens toward the active material application portion 21, it can also be used as a buffer and storage structure for gas generated within the electrode assembly 2, reducing expansion of the battery cell 10 and improving the reliability and stability of the battery cell 10.

[0104] Furthermore, since the first accommodating groove 12110 is located inside the first electrode pillar 120, external foreign matter and impurities are less likely to enter the first accommodating groove 12110, which reduces the impact of external foreign matter and impurities on the electrode assembly 2, improving the operational stability and reliability of the electrode assembly 2 and further improving the stability and reliability of the battery cell 10 and the battery 100.

[0105] 13 again, in the embodiments of the present application, the method of connecting the first terminal post 120 to the case 11 is not limited, and may be, for example, welding or riveting. For example, when the two are fitted together by riveting, the case 11 has a mounting hole 113, and the first terminal post 120 is attached by riveting into the mounting hole 113. Of course, even when the two are fitted together by welding or another method, the mounting hole 113 may be provided in the case 11 so that the first terminal post 120 can be easily attached to the case 11 through the mounting hole 113, and it can be understood that this is not limited here.

[0106] At the same time, the first accommodating groove 12110 may be provided corresponding to the position of the mounting hole 113. In other words, on a projection plane perpendicular to the axial direction R of the first pole 120, the orthogonal projection of the first accommodating groove 12110 is within the orthogonal projection range of the mounting hole 113. This allows the first accommodating groove 12110 to have a greater depth and to accommodate a larger number of first conductive parts 221, thereby significantly reducing the space occupied by the first conductive parts 221 within the case 11. Specifically, when the mounting hole 113 is opened in the case 11 and the first pole 120 is attached to the mounting hole 113, the depth H1 of the first accommodating groove 12110 in the axial direction R of the first pole 120 is equal to or greater than the minimum distance H2 from the pole inner end surface 122 to the mounting hole 113.

[0107] It should be noted that the specific shape of the first receiving groove 12110 is not limited and may be a regular shape or an irregular shape. For example, it may be a columnar groove with a rectangular, elliptical, or runway-shaped cross section, a trapezoidal groove with a rectangular cross section and a gradually changing cross-sectional size, a hemispherical groove with a circular cross section and a gradually changing cross-sectional size, or a hemi-elliptical groove with an elliptical cross section and a gradually changing cross-sectional size. Therefore, the depth H1 of the first receiving groove 12110 refers to the maximum depth of the first receiving groove 12110 in the axial direction R of the first pole pillar 120.

[0108] In the axial direction R of the first electrode post 120, the depth H1 of the first accommodating groove 12110 is equal to or greater than the minimum distance H2 from the electrode post inner end surface 122 to the mounting hole 113, thereby fully utilizing the volume of the first electrode post 120. The first accommodating groove 12110 has a greater depth, which is advantageous for accommodating a larger number of first conductive parts 221, thereby significantly reducing the space occupied by the first conductive parts 221 in the case 11, further increasing the energy density of the battery cell 10, and reducing redundancy of the first conductive parts 221 in the case 11. At the same time, the greater depth of the first accommodating groove 12110 allows it to accommodate gas generated from the electrode assembly 2 to ensure the reliability and stability of the battery cell 10, and also accommodates a larger amount of electrolyte to ensure the service life of the battery cell 10.

[0109] Referring again to Figures 13 and 14, in order to ensure the stability and reliability of the electrical connection between the active material application portion 21 and the first electrode post 120, in some embodiments of the present application, the electrical connection position between the first conductive portion 221 and the first electrode post 120 may be on the groove wall of the first accommodating groove 12110 formed in the accommodating portion 121.

[0110] For example, the first conductive part 221 and the first terminal post 120 may be electrically connected by welding, and the electrical connection position is the welding position between the first conductive part 221 and the first terminal post 120. At the same time, the welding method between the first conductive part 221 and the first terminal post 120 is not limited, and may be, for example, laser welding. Furthermore, vertical welding, inclined welding, lap welding, edge seal welding, etc. may be selected depending on factors such as the position, angle, or structure of the welding portion. In other embodiments of the present application, the first conductive part 221 and the first terminal post 120 may be electrically connected by other methods, such as providing a conductive adhesive or a conductive nail, instead of welding. For simplicity of explanation, the following description will be given taking as an example a case where the first conductive part 221 and the first terminal post 120 are electrically connected by welding, and the welding position is the electrical connection position between the first conductive part 221 and the first terminal post 120.

[0111] Specifically, the first electrode post 120 includes a first end wall 12111 and a first side wall 12113. The first end wall 12111 is located on the side of the first side wall 12113 that is away from the active material coated portion 21, and the first end wall 12111 and the first side wall 12113 surround and form a first accommodating groove 12110, and the electrical connection position between the first conductive portion 221 and the first electrode post 120 is located on the first end wall 12111 and / or the first side wall 12113. In other words, the first conductive portion 221 may be welded to at least one of the first end wall 12111 and the first side wall 12113.

[0112] In the above technical solution, by setting the electrical connection position between the first conductive portion 221 and the first pole 120 to at least one of the first end wall 12111 and the first side wall 12113, the first accommodating groove 12110 not only has the function of accommodating at least a portion of the first conductive portion 221, but the groove wall of the first accommodating groove 12110 also has the function of realizing electrical connection with the first conductive portion 221, thereby simplifying the structure of the first pole 120 and facilitating the processing of the first pole 120, as well as simplifying the structure of the first conductive portion 221, reducing the redundancy of the first conductive portion 221, and reducing the cost of the first conductive portion 221. In addition, by using the groove wall of the first accommodating groove 12110 to achieve electrical connection with the first conductive part 221, the area for electrical connection between the first conductive part 221 and the first pole 120 can be set relatively large, which not only reduces the difficulty of electrical connection but also improves the reliability and stability of the electrical connection, thereby improving the performance of the battery cell 10.

[0113] Furthermore, since the electrical connection position between the first conductive part 221 and the first pole 120 is located within the first accommodating groove 12110, not only is it possible to prevent the electrical connection position from protruding from the outside of the first pole 120 and occupying space other than the first pole 120, but the electrical connection position can also be protected by the first pole 120, thereby improving the reliability and stability of the electrical connection between the first conductive part 221 and the first pole 120.

[0114] In addition, in the embodiments of the present application, the first end wall 12111 is configured as a sealed structure without any via holes, thereby isolating the first accommodating groove 12110 from the external space of the case 11, thereby avoiding the problem of the electrolyte in the case 11 leaking from the first accommodating groove 12110.

[0115] 13 and 14, in some alternative embodiments, the local shape of the first conductive portion 221 matches the local shape of the first end wall 12111 so that the position where the first conductive portion 221 is electrically connected to the first end wall 12111 extends in the length or width direction of the first end wall 12111, and the first conductive portion 221 is bonded to the first end wall 12111 to achieve the electrical connection. For example, if the first end wall 12111 is flat, a portion of the first conductive portion 221 may also be flat and bonded to the first end wall 12111, and the bonding position may be electrically connected by, for example, welding. This increases the area of ​​electrical connection and improves the reliability and stability of the electrical connection.

[0116] Furthermore, when the electrical connection between the first conductive portion 221 and the first end wall 12111 is made by welding, the first end wall 12111 is located on the side of the first accommodating groove 12110 away from the active material application portion 21, making the welding operation easy; for example, welding can be performed from the side of the first pole 120 away from the active material application portion 21.

[0117] It should be noted that the shape of the first end wall 12111 is not limited, and may be, for example, a flat plate, an arc plate, etc. Here, when the first end wall 12111 has a flat structure, the first end wall 12111 is disposed at an angle with respect to the axial direction R of the first electrode post 120, and may be, for example, a flat plate structure perpendicular to the axial direction R of the first electrode post 120, or may be, for example, an inclined plate structure not perpendicular to the axial direction R of the first electrode post 120, but the inclination direction is not limited.

[0118] Of course, in other embodiments of the present application, the position at which the first conductive portion 221 is electrically connected to the first end wall 12111 may not extend in the length or width direction of the first end wall 12111, but may be, for example, a plurality of discrete points, for example, the first conductive portion 221 has a plurality of spaced apart portions each welded to the first end wall 12111, which will not be described in detail here.

[0119] 15 is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application. When the first conductive portion 221 is electrically connected to the first end wall 12111, a first countersunk groove 12112 may be provided in the first end wall 12111, and the recessed direction of the first countersunk groove 12112 is opposite to the active material applied portion 21. At least a portion of the electrical connection position between the first conductive portion 221 and the first end wall 12111 is located within the first countersunk groove 12112. For example, at least a portion of the first conductive portion 221 may be provided within the first countersunk groove 12112 and connected to a portion of the first end wall 12111 that defines the first countersunk groove 12112.

[0120] In the above technical solution, on the one hand, the first countersunk groove 12112 can be used to realize pre-positioning and position control of the electrical connection position of the first conductive part 221, which is advantageous for identifying the exact position to achieve electrical connection and improving production efficiency, as well as for improving the stability and reliability of the first conductive part 221, ensuring the stability and reliability during charging and discharging of the battery cell 10. On the other hand, by providing the first countersunk groove 12112 in the first end wall 12111, the wall thickness of the first end wall 12111 can be locally thinned, which is advantageous for welding and for reducing the weight of the first electrode post 120, thereby improving the weight-energy density of the battery cell 10.

[0121] Referring again to Figures 14 and 15, in the embodiments of the present application, a first groove 126 may be provided in the first pole 120 if necessary, and the first groove 126 is located on the side of the first pole 120 away from the active material application portion 21. That is, the surface of the first pole 120 away from the active material application portion 21 is the pole outer end surface 123, and the groove opening of the first groove 126 is formed on the pole outer end surface 123.

[0122] It can be understood that the first groove 126 is a groove body, and the groove body is a groove-like structure having a certain depth. Furthermore, when the first electrode post 120 is attached to the upper end wall of the case 11 and the electrode post outer end surface 123 is the upper surface of the first electrode post 120, the first groove 126 is formed as a first groove with an opening that opens upward and whose groove walls are recessed downward (i.e., a square recess that is recessed closer to the electrode assembly 2). Furthermore, when the first electrode post 120 is attached to the lower end wall of the case 11 and the electrode post outer end surface 123 is the lower surface of the first electrode post 120, the first groove 126 is formed as a first groove with an opening that opens downward and whose groove walls are recessed upward (i.e., a square recess that is recessed away from the electrode assembly 2).

[0123] In the above technical solution, on the one hand, the first electrode post 120 is provided with the first groove 126, which can further reduce the weight of the first electrode post 120 and improve the weight-energy density of the battery cells 10 and the battery 100. On the other hand, the first groove 126 is located on the outside of the first electrode post 120, i.e., it opens on the side of the first electrode post 120 opposite to the inside of the case 11. The structural components in the battery 100 that electrically connect the battery cells 10 can be accommodated or mounted in the first groove 126, which can fully utilize the space within the first electrode post 120 and improve the space utilization rate and volumetric energy density of the battery 100.

[0124] Furthermore, the first electrode post 120 has both the first accommodating groove 12110 and the first groove 126, and the first groove 126 is located on the side of the first accommodating groove 12110 that faces away from the active material coated portion 21 and opens in the opposite direction to the first accommodating groove 12110. This makes it convenient to laser-weld the first conductive part 221 and the first end wall 12111 through the first groove 126 from the outside of the first electrode post 120, i.e., the side of the first electrode post 120 that faces away from the active material coated portion 21, facilitating external welding to electrically connect the first conductive part 221 and the first electrode post 120. In other words, the above structure facilitates external welding of the first electrode post 120 and the first conductive part 221 through the first groove 126, facilitating processing and manufacturing of the battery cell 10 and reducing processing and manufacturing costs.

[0125] Furthermore, in order to simply and effectively weld the first conductive part 221 to the groove wall of the first accommodating groove 12110 through the first groove 126 and improve the welding reliability between the first conductive part 221 and the groove wall of the first accommodating groove 12110, in the embodiments of the present application, the portion between the first groove 126 and the first accommodating groove 12110 and the first conductive part 221 may be laser welded, that is, the gap 127 shown in Figure 15 is laser welded to the first conductive part 221 to realize an electrical connection between the electrode assembly 2 and the first pole 120. The thickness of the spacing portion 127 of the first pole 120 located between the first groove 126 and the first accommodating groove 12110 is relatively thin, and the spacing portion 127 separates the first groove 126 from the first accommodating groove 12110. The wall surface of the spacing portion 127 closer to the active material application portion 21 can be the first end wall 12111. When the first conductive portion 221 needs to be welded to the first end wall 12111, the relatively thin thickness of the spacing portion 127 makes it advantageous to weld the first conductive portion 221 to the first end wall 12111 through the first groove 126, thereby improving the convenience and reliability of the welding.

[0126] Referring again to FIG. 14 , the battery cell 10 may further include a slot cover 7 disposed on the first electrode post 120 and covering the opening of the first groove 126. In the above technical solution, the slot cover 7 covering the first groove 126 allows the first electrode post 120 to achieve an indirect electrical connection with the current collecting member via the slot cover 7. By adjusting the position and structure of the slot cover 7, the electrical connection between the slot cover 7 and the current collecting member can be facilitated and the electrical connection area can be increased. Thus, the slot cover 7 facilitates the electrical connection between adjacent battery cells 10 in the battery 100. Furthermore, the electrical connection position between the battery cells 10 is located on the slot cover 7, and the electrical connection position between the first conductive part 221 and the first electrode post 120 is separated by the first groove 126, reducing interference between them and further improving the stability and reliability of the battery cell 10.

[0127] 16, which is a partial cross-sectional view of a battery cell 10 provided in some embodiments of the present application. The accommodating portion 121 may be configured to include a second accommodating groove 12120, the surface of the first pole 120 facing away from the active material coated portion 21 being the pole outer end surface 123, the opening of the second accommodating groove 12120 being formed in the pole outer end surface 123, the second accommodating groove 12120 communicating with the interior of the case 11 through a via hole 12130, and the first conductive portion 221 being inserted through the via hole 12130 and at least partially accommodated in the second accommodating groove 12120.

[0128] It can be understood that the second accommodating groove 12120 is a groove body, and the groove body is a groove-like structure with a certain depth. For example, if the first electrode post 120 is attached to the upper end wall of the case 11 and the electrode post outer end surface 123 is the upper surface of the first electrode post 120, the second accommodating groove 12120 is formed as an accommodating groove with a groove opening upward and groove walls recessed downward. Also, for example, if the first electrode post 120 is attached to the lower end wall of the case 11 and the electrode post outer end surface 123 is the lower surface of the first electrode post 120, the second accommodating groove 12120 is formed as an accommodating groove with a groove opening downward and groove walls recessed upward.

[0129] Referring again to FIG. 16 , in the above technical solution, on the one hand, by providing the second accommodating groove 12120 in the first pole 120, the weight of the first pole 120 can be reduced to a certain extent, and the weight energy density of the battery cell 10 and the battery 100 can be improved. On the other hand, the groove opening of the second accommodating groove 12120 is formed in the outer end surface 123 of the electrode post, and the outer end surface 123 is the surface of the first electrode post 120 that faces away from the active material applied portion 21. Therefore, the second accommodating groove 12120 can open in the direction opposite to the active material applied portion 21. In this way, when at least a portion of the first conductive portion 221 is accommodated in the second accommodating groove 12120, the first conductive portion 221 can be easily accommodated and organized through the groove opening of the second accommodating groove 12120. Furthermore, electrical connection operations between the first conductive portion 221 and the first electrode post 120 can be easily performed through the groove opening of the second accommodating groove 12120. This reduces the difficulty of manufacturing the battery cell 10 and improves the production efficiency of the battery cell 10.

[0130] At the same time, because the second accommodating groove 12120 can communicate with the interior of the case 11 through the via hole 12130, the second accommodating groove 12120 can also be used as a buffer and temporary storage structure for the electrolyte, allowing more electrolyte to be accommodated within the case 11. Because electrolyte is consumed during the charging and discharging process of the battery cell 10, more electrolyte can extend the service life of the battery cell 10. In addition, because the second accommodating groove 12120 can communicate with the interior of the case 11 through the via hole 12130, the second accommodating groove 12120 can also be used as a buffer structure for accommodating and buffering gas generated within the electrode assembly 2, reducing expansion of the battery cell 10 and improving the reliability and stability of the battery cell 10.

[0131] It should be noted that when the accommodating part 121 has the second accommodating groove 12120 and the first conductive part 221 is inserted into the via hole 12130 and at least partially accommodated in the second accommodating groove 12120, the electrical connection position between the first conductive part 221 and the first pole 120 is not limited. For example, when the first conductive part 221 is inserted into the via hole 12130 and at least partially accommodated in the second accommodating groove 12120, in the embodiment of the present application, the electrical connection position between the first conductive part 221 and the first pole 120 is located at the hole wall of the via hole 12130 formed in the first pole 120.

[0132] In the above technical solution, the electrical connection position between the first conductive part 221 and the first electrode post 120 is set on the hole wall of the via hole 12130, which facilitates the electrical connection operation between the first conductive part 221 and the first electrode post 120 via the second accommodating groove 12120. Furthermore, when the electrical connection area between the first conductive part 221 and the first electrode post 120 is large, the sealing of the via hole 12130 can be achieved by the electrical connection between the first conductive part 221 and the first electrode post 120, thereby saving sealing costs, reducing electrolyte leakage, and saving sealing parts.

[0133] Specifically, the first conductive part 221 and the wall of the via hole 12130 can be welded to each other at the position where the via hole 12130 is connected to the second accommodating groove 12120, making the operation easy. In addition, by controlling the welding marks and sealing the via hole 12130 using the welding marks and the first conductive part 221, the problem of the electrolyte inside the case 11 leaking from the via hole 12130 can be alleviated.

[0134] As another example, when the first conductive part 221 is inserted through the via hole 12130 and at least partially accommodated in the second accommodating groove 12120, in some other embodiments of the present application, the electrical connection position between the first conductive part 221 and the first pole 120 may be located on the groove wall of the second accommodating groove 12120 formed in the first pole 120. This facilitates the electrical connection operation and, for example, when the first conductive part 221 is welded to the groove wall of the second accommodating groove 12120 formed in the first pole 120, it is possible to alleviate problems such as conductive particles generated by welding entering the case 11 and causing a short circuit.

[0135] Referring again to Figure 16, the first electrode post 120 includes a second end wall 12121 and a second side wall 12123, the second end wall 12121 is located on the side of the second side wall 12123 closer to the active material application portion 21, the second end wall 12121 and the second side wall 12123 surround each other to form a second accommodating groove 12120, the via hole 12130 is opened in the second end wall 12121, and the electrical connection position between the first conductive portion 221 and the first electrode post 120 is located on the second end wall 12121 and / or the second side wall 12123.

[0136] More specifically, the first conductive part 221 and the first pole 120 may be electrically connected by welding, and therefore the welding position is the electrical connection position between the first conductive part 221 and the first pole 120. In other embodiments of the present application, the first conductive part 221 and the first pole 120 may be electrically connected by other methods, such as by providing a conductive adhesive or a conductive nail, instead of welding, which will not be described in detail herein.

[0137] For the sake of simplicity, the following description will be given taking as an example a case where the first conductive part 221 and the first pole 120 are electrically connected by welding, and the welding position is the electrical connection position between the first conductive part 221 and the first pole 120. For example, in some embodiments, the electrical connection position between the first conductive part 221 and the first pole 120 may be located on the second end wall 12121 and / or the second side wall 12123, and the first conductive part 221 may be welded to at least one of the second end wall 12121 and the second side wall 12123.

[0138] In the above technical solution, the electrical connection position between the first conductive part 221 and the first pole 120 is set on at least one of the second end wall 12121 and the second side wall 12123, so that the second accommodating groove 12120 not only accommodates at least a portion of the accommodating first conductive part 221, but also has a groove wall of the second accommodating groove 12120 that establishes electrical connection with the first conductive part 221, thereby simplifying the structure of the first pole 120 and facilitating processing of the first pole 120. In addition, because the via hole 12130 is opened in the second end wall 12121, the first conductive part 221 can easily extend into the second accommodating groove 12120 through the via hole 12130, thereby simplifying the structure of the first conductive part 221, reducing redundancy in the first conductive part 221, and reducing costs for the first conductive part 221. Furthermore, due to the opening direction of the groove mouth of the second accommodating groove 12120, the electrical connection between the first conductive part 221 and the groove wall of the second accommodating groove 12120 can be easily performed through the groove mouth of the second accommodating groove 12120, making the electrical connection less difficult. Furthermore, by achieving the electrical connection with the first conductive part 221 through the groove wall of the second accommodating groove 12120, the area for electrical connection between the first conductive part 221 and the first pole 120 can be made relatively large, improving the reliability and stability of the electrical connection and further improving the performance of the battery cell 10.

[0139] Furthermore, since the electrical connection position between the first conductive part 221 and the first pole 120 is located within the second accommodating groove 12120, not only is it possible to prevent the electrical connection position from protruding from the outside of the first pole 120 and occupying space other than the first pole 120, but the electrical connection position can also be protected by the first pole 120, thereby improving the reliability and stability of the electrical connection between the first conductive part 221 and the first pole 120.

[0140] 16 , in some embodiments, the local shape of the first conductive portion 221 matches the local shape of the second end wall 12121 so that the location where the first conductive portion 221 electrically connects to the second end wall 12121 extends along the length or width of the second end wall 12121, and the first conductive portion 221 is bonded to the second end wall 12121 to achieve the electrical connection. For example, if the second end wall 12121 is flat, a portion of the first conductive portion 221 may also be flat and bonded to the second end wall 12121, and the bonding location may be electrically connected by, for example, welding. This increases the area of ​​electrical connection, improving the reliability and stability of the electrical connection.

[0141] It should be noted that the shape of the second end wall 12121 is not limited, and may be, for example, a flat plate-like structure, an arc-shaped structure, etc. Here, when the second end wall 12121 has a flat plate-like structure, the second end wall 12121 is disposed at an angle with respect to the axial direction R of the first electrode post 120, and may be, for example, a flat plate-like structure perpendicular to the axial direction R of the first electrode post 120, or may be, for example, an inclined flat plate structure not perpendicular to the axial direction R of the first electrode post 120, but the inclination direction is not limited.

[0142] 16, when the second end wall 12121 has a flat plate-like structure, the included angle θ between the second end wall 12121 and the axial direction R of the first electrode post 120 is equal to 90°, that is, the second end wall 12121 and the active material coated portion 21 are equidistant from each other in the direction from the via hole 12130 toward the second side wall 12123. This facilitates welding of the first conductive portion 221 and the second end wall 12121.

[0143] Furthermore, for example, the included angle θ between the second end wall 12121 and the axial direction R of the first electrode post 120 is greater than 90°, that is, in the direction from the via hole 12130 toward the second side wall 12123, the second end wall 12121 extends at an angle approaching the active material coated portion 21. This increases the extension distance of the first conductive portion 221 along the second end wall 12121, thereby improving the reliability of the electrical connection. For example, the included angle θ between the second end wall 12121 and the axial direction R of the first electrode post 120 may be 90° to 145°, such as 100°, 110°, 120°, 130°, or 140°. This, on the one hand, makes it easier to process the second end wall 12121 and to make electrical connection with the first conductive part 221, and on the other hand, makes it possible to fully utilize the space within the first pole 120 to accommodate the first conductive part 221.

[0144] As another example, the included angle θ between the second end wall 12121 and the axial direction R of the first pole 120 is smaller than 90°, i.e., in the direction from the via hole 12130 toward the second side wall 12123, the second end wall 12121 extends at an angle away from the active material application portion 21.

[0145] This increases the extension distance of the first conductive part 221 along the second end wall 12121, thereby improving the reliability of the electrical connection. For example, the included angle θ between the second end wall 12121 and the axial direction R of the first electrode post 120 may be 45° to 90°, such as 50°, 60°, 70°, 80°, etc. This, on the one hand, makes it easier to process the second end wall 12121 and the first conductive part 221, and, on the other hand, makes it possible to fully utilize the space within the first electrode post 120 to accommodate the first conductive part 221.

[0146] Of course, the present application is not limited thereto. In other embodiments of the present application, the position at which the first conductive portion 221 is electrically connected to the second end wall 12121 does not have to extend in the length or width direction of the second end wall 12121, but may be a plurality of discrete points. For example, the first conductive portion 221 has a plurality of spaced apart portions that are respectively welded to the second end wall 12121, and this will not be described in detail here.

[0147] Referring again to FIG. 16 and further to FIG. 17, FIG. 17 is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application. Regardless of the specific value of the included angle θ between the second end wall 12121 and the axial direction R of the first electrode post 120, in the embodiments of the present application, when the first conductive portion 221 is electrically connected to the second end wall 12121, a second countersunk groove 12122 can be provided in the second end wall 12121 as needed. The second countersunk groove 12122 is a recessed groove formed by sinking a portion of the second end wall 12121 toward the end closest to the active material-coated portion. The position where the first conductive portion 221 is electrically connected to the second end wall 12121 is at least partially located within the second countersunk groove 12122.

[0148] In the above technical solution, the portion of the first conductive part 221 located within the second countersunk groove 12122 is set to match the shape of the second countersunk groove 12122 and is attached to achieve electrical connection, so that the second countersunk groove 12122 can be used to pre-position and regulate the electrical connection position of the first conductive part 221, which is advantageous for identifying the exact position to achieve electrical connection, improving production efficiency, improving the stability and reliability of the electrical connection position, and ensuring the reliability and stability of the charging and discharging operation of the battery cell 10.

[0149] 17 again, in the embodiments of the present application, the method of connecting the first terminal post 120 and the case 11 is not limited, and may be, for example, welding or riveting. For example, when the two are fitted together by riveting, the case 11 has a mounting hole 113, and the first terminal post 120 is attached by riveting into the mounting hole 113. Of course, it can be understood that the mounting hole 113 may be provided in the case 11, and the first terminal post 120 is attached to the mounting hole 113, even when the two are fitted together by welding or another method.

[0150] Optionally, referring again to FIG. 16, the second accommodating groove 12120 may be provided corresponding to the position of the mounting hole 113. In other words, on a projection plane perpendicular to the axial direction R of the first pole 120, the orthogonal projection of the second accommodating groove 12120 is within the orthogonal projection range of the mounting hole 113, so that the second accommodating groove 12120 has a greater depth and can accommodate more of the first conductive part 221, thereby significantly reducing the space occupied by the first conductive part 221 within the case 11.

[0151] In some embodiments, referring again to FIG. 16, the case 11 has a mounting hole 113, and when the first pole 120 is mounted in the mounting hole 113, the depth H3 of the second accommodating groove 12120 in the axial direction R of the first pole 120 is greater than or equal to the minimum distance H4 from the pole outer end surface 123 to the mounting hole 113.

[0152] It should be noted that the specific shape of the second receiving groove 12120 is not limited and may be a regular shape or an irregular shape. For example, it may be a columnar groove with a rectangular, elliptical, or runway-shaped cross section, a trapezoidal groove with a rectangular cross section and gradually changing cross-sectional size, a hemispherical groove with a circular cross section and gradually changing cross-sectional size, or a hemi-elliptical groove with an elliptical cross section and gradually changing cross-sectional size. It should be noted that the runway-shaped shape described in this specification refers to a shape in which the two short sides of a rectangle are replaced with outward convex curves.

[0153] Therefore, the depth H3 of the second accommodating groove 12120 refers to the maximum depth of the second accommodating groove 12120 in the axial direction R of the first electrode pole 120. In the axial direction R of the first electrode pole 120, the depth H3 of the second accommodating groove 12120 is equal to or greater than the minimum distance H4 from the electrode pole outer end surface 123 to the mounting hole 113. This allows the volume of the first electrode pole 120 to be fully utilized, and the second accommodating groove 12120 has a greater depth, which is advantageous for accommodating more first conductive parts 221. This significantly reduces the space occupied by the first conductive parts 221 in the case 11, further increasing the energy density of the battery cell 10 and reducing redundancy of the first conductive parts 221 in the case 11. At the same time, the greater depth of the second accommodating groove 12120 allows it to accommodate gas generated from the electrode assembly 2 to ensure the reliability and stability of the battery cell 10 and accommodate more electrolyte to ensure the service life of the battery cell 10.

[0154] 17 and further refer to FIG. 18, which is a partial cross-sectional schematic diagram of a battery cell 10 provided in some embodiments of the present application. In the embodiments of the present application, when the receiving portion 121 has the second receiving groove 12120 of any of the above embodiments, optionally, the battery cell 10 may further include a cover plate 13 that fits with the first pole 120 and seals the opening of the second receiving groove 12120, and the cover plate 13 is electrically connected to the first pole 120.

[0155] In the above technical solution, by providing a cover plate 13 that seals the opening of the second accommodating groove 12120, it is possible to prevent the electrolyte in the case 11 from leaking from the opening of the second accommodating groove 12120. Furthermore, since the cover plate 13 seals the opening of the second accommodating groove 12120 and is electrically connected to the first electrode pole 120, an indirect electrical connection between the first electrode pole 120 and the current collecting member can be easily realized by the cover plate 13, which is advantageous in increasing the connection area of ​​the electrical connection position and thereby also advantageous in reducing the resistance of the electrical connection position.

[0156] It should be noted that, as long as the cover plate 13 can seal the opening of the second accommodating groove 12120, the manner and position of fitting the cover plate 13 and the first terminal post 120 are not limited. For example, in some embodiments, the cover plate 13 may be welded to the first terminal post 120, and during processing, the first conductive part 221 may first be passed through the via hole 12130 and welded to the wall of the second accommodating groove 12120, and then the cover plate 13 and the first terminal post 120 may be welded to seal the opening of the second accommodating groove 12120.

[0157] It should also be noted that there is no limitation on the specific configuration of the cover plate 13. For example, in some alternative embodiments, referring to Fig. 18, the cover plate 13 includes a first conductive member 131 and a second conductive member 132 made of different materials, the first conductive member 131 being fitted and electrically connected to the first pole 120, and the second conductive member 132 being fitted and electrically connected to the first conductive member 131.

[0158] In the above technical solution, by configuring the cover plate 13 as a composite and configuring the first conductive member 131 to be made of the same material as the first electrode post 120, it is possible to easily and reliably and stably connect the first conductive member 131 to the first electrode post 120. For example, by welding, the first conductive member 131 can be easily and reliably connected to the first electrode post 120. Because the second conductive member 132 and the first conductive member 131 are made of different materials, it is easy to use the second conductive member 132 to electrically connect to a current collecting member made of a different material from that of the first electrode post 120. For example, by welding, the second conductive member 132 can be easily and reliably connected to a current collecting member made of the same material as the second conductive member 132.

[0159] For example, when the first electrode post 120 is the negative electrode post 12, if the first electrode post 120 is a copper post and the current collecting member is an aluminum sheet, the first conductive member 131 can be made of copper and the second conductive member 132 can be made of aluminum. In this case, the first electrode post 120 and the first conductive member 131 are made of the same material and can be effectively welded together, and the second conductive member 132 and the current collecting member are made of the same material and can be effectively welded together, thereby effectively realizing an indirect electrical connection between the first electrode post 120 and the current collecting member via the cover plate 13. In addition, the first electrode post 120 and the first conductive member 131 are welded together using copper materials, which has high fluidity and is less likely to crack, which is advantageous for improving the sealing effect of the welded area.

[0160] 18 again, in some optional examples, the first conductive member 131 is located between the second accommodating groove 12120 and the second conductive member 132. In the above technical solution, since the first conductive member 131 is located between the second accommodating groove 12120 and the second conductive member 132, the second accommodating groove 12120 and the second conductive member 132 can be separated from each other. As a result, when the electrolyte in the case 11 enters the second accommodating groove 12120 through the via hole 12130, the first conductive member 131 prevents this portion of the electrolyte from contacting the second conductive member 132, thereby solving the problem of corrosion of the second conductive member 132 by the electrolyte.

[0161] It should be noted that the manner in which the first conductive member 131 and the second conductive member 132 are fitted together is not limited. For example, in some embodiments, referring to FIG. 18 , the first conductive member 131 has a second groove 1311, the second conductive member 132 is fitted into the second groove 1311, and the opening of the second groove 1311 is formed on the surface of the first conductive member 131 facing away from the second receiving groove 12120, so that the second conductive member 132 is exposed from the opening of the second groove 1311. Alternatively, in other embodiments, the connection between the first conductive member 131 and the second conductive member 132 may be a fastening connection, a locking connection, or the like.

[0162] It should also be noted that the term "exposed" in exposing the second conductive member 132 from the opening of the second groove 1311 means that the first conductive member 131 does not block the second conductive member 132 at the opening of the second groove 1311, and that the second conductive member 132 does not need to protrude from the opening of the second groove 1311. For example, the second conductive member 132 may be flush with the surface of the first conductive member 131 on the side facing away from the second accommodating groove 12120, or the second conductive member 132 may protrude from the surface of the first conductive member 131 on the side facing away from the second accommodating groove 12120.

[0163] In the above technical solution, on the one hand, by fitting the second conductive member 132 into the first conductive member 131, the difficulty of attaching the first conductive member 131 and the second conductive member 132 is reduced, and the stability and convenience of the fitting between the first conductive member 131 and the second conductive member 132 are improved. In addition, the thickness of the cover plate 13 is reduced, thereby reducing the space occupied by the cover plate 13 and improving the space utilization rate of the battery cell 10. On the other hand, the second conductive member 132 can be exposed from the surface of the first conductive member 131 facing away from the second receiving groove 12120 through the opening of the second groove 1311, which is advantageous for achieving an electrical connection between the second conductive member 132 and a current collecting member outside the first pole 120.

[0164] Furthermore, since the groove opening of the second groove 1311 is formed on the surface of the first conductive member 131 facing away from the second accommodating groove 12120, the second groove 1311 opens in the direction opposite to the active material application portion 21. As a result, the portion of the first conductive member 131 that defines the groove wall of the second groove 1311 is positioned between the second accommodating groove 12120 and the second conductive member 132, separating the second accommodating groove 12120 and the second conductive member 132. This prevents the electrolyte that has entered the second groove 1311 from coming into contact with the second conductive member 132, thereby reducing leakage of the electrolyte.

[0165] Of course, in other embodiments, the cover plate 13 may not be a composite made of multiple materials. For example, in other embodiments of the present application, the entire cover plate 13 may be a non-composite made of the same material, for example, to fit the positive electrode pole, but this will not be described in detail here.

[0166] 18 again, the cover plate 13 is further fitted into the groove opening of the second accommodating groove 12120. In the above technical solution, fitting the cover plate 13 into the second accommodating groove 12120 reduces the difficulty of attaching the cover plate 13 to the first pole 120, improves the attachment stability between the cover plate 13 and the first pole 120, and improves the reliability and convenience of the connection, and reduces the occupation of the cover plate 13 in the space other than the first pole 120. In addition, because the cover plate 13 is fitted into the groove opening of the second accommodating groove 12120, there is sufficient space within the second accommodating groove 12120 to accommodate the first conductive part 221.

[0167] Of course, in other embodiments of the present application, the fitting method between the cover plate 13 and the first pole 120 is not limited to being fitted into the second accommodating groove 12120, but the cover plate 13 may be directly placed over the outside of the first pole 120 and directly cover the opening of the second accommodating groove 12120, and is not limited to this embodiment as long as it is easy to fit with the current collecting member of the battery 100.

[0168] 10 , a partial projection of the first guide portion 32 in the plane in which the via hole 12130 is located is located within the via hole 12130. In this manner, the first conductive portion 221 passes through the via hole 12130 with the guidance of the first guide portion 32, facilitating connection between the first conductive portion 221 and the first electrode post 120, further reducing the probability of the first conductive portion 221 colliding with the first electrode post 120, reducing the risk of failure and damage to the electrode assembly 2, and improving the reliability and stability of the battery cell 10.

[0169] In an alternative solution, the support body 3 includes two first poles 120, and two through holes 310 are formed in the support body 3, with the two first poles 120 fitting into the two through holes 310 in a one-to-one correspondence. During the process of installing the electrode assembly 2 into the case 11 of the battery cell 10, the two first guide portions 32 of the support body body 31 can simultaneously guide and protect the two first conductive portions 221 of the electrode assembly 2, and the two first conductive portions 221 can simultaneously enter the through holes 310 at corresponding positions, facilitating the connection between each first conductive portion 221 and the first poles 120 at corresponding positions, which is advantageous for improving production efficiency.

[0170] The present application further provides a battery 100 including the battery cell 10 described in any of the above solutions. In the technical solution of the embodiment of the present application, the use of the battery cell 10 can improve the reliability and stability of the battery 100.

[0171] The present application further provides an electric device 1000 including the battery cell 10 described in any of the above solutions or the battery 100 described in the above solutions, where the battery 100 is used to supply electric energy to the electric device 1000. The electric device 1000 may be any of the above-mentioned devices or systems that use the battery 100. In the technical solutions of the embodiments of the present application, the reliability and stability of the electric device 1000 can be improved by using the above-mentioned battery 100 or battery cell 10.

[0172] Finally, it should be noted that the above embodiments are merely for illustrating the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art will understand that modifications to the technical solutions described in the above embodiments, or equivalent substitutions for some or all of the technical features thereof, are possible. Such modifications or substitutions do not deviate from the essence of the corresponding technical solutions within the scope of the technical solutions of the embodiments of the present application, and are all within the scope of the claims and description of the present application. In particular, as long as there is no structural contradiction, any technical features described in the embodiments can be arbitrarily combined. The present application is not limited to the specific embodiments disclosed herein, and includes all technical solutions within the scope of the claims. [Explanation of symbols]

[0173] The reference numerals in the drawings in the detailed description of the invention are as follows: 1000 Electrical Equipment 100 batteries 200 Controller 300 motor Z 1st direction X 2nd direction Y Third direction R Axial direction of pole 10 battery cells 20 boxes 201 Part 1 202 Part 2 11 cases 111 Case body 1110 Aperture 112 Case Cover 113 Mounting hole 12 Polar Pillar 120 First Pole 121 Storage unit 12110 First storage groove 12111 1st end wall 12112 First counterbore groove 12113 First side wall 12120 Second storage groove 12121 Second end wall 12122 Second counterbore groove 12123 Second side wall 12130 Beer Hall 122 Pole inner end face 123 Pole column outer end face 126 1st groove 127 Spacing 13 Lid plate 131 first conductive member 1311 Second groove 132 second conductive member 2 electrode assembly 21 Active material application section 22 Conductive part 221 First conductive part 3 Support 30 through holes 31 Support body 310 Through hole 311 Ventilation hole 3121 First side surface 3122 Second side surface 32 First guide section 321 First Guide Sheet 322 First connection sheet 33 Second guide section 331 Second Guide Sheet 332 Second connection sheet 7 groove lid

Claims

1. a support body having a through hole for exposing a part of the pole; a first guide portion provided on the support body for guiding the conductive portion of the electrode assembly so that the conductive portion passes through the through hole and connects to the electrode post.

2. 2. The support according to claim 1, wherein the first guide portion includes a first guide sheet extending at an angle in a direction away from the support body, and the first guide sheet is configured to be movable in a direction approaching the support body by the action of the electrode assembly so as to be pressed between the electrode assembly and the pole.

3. The support body according to claim 2, wherein the first guide sheet is provided on a first side of the support body in the axial direction of the through hole, and the included angle between the first guide sheet and the first side surface of the support body is 75° or less.

4. 4. The support of claim 2 or 3, wherein the first guide portion further includes a first connection sheet, a first end of the first connection sheet in the first direction connected to the support body, a second end of the first connection sheet in the first direction extending toward the center position of the through hole and connected to the first guide sheet, and the first guide sheet is configured to be movable in a direction approaching the support body by the action of the electrode assembly so as to be pressed between the electrode assembly and the first connection sheet.

5. The support body according to claim 4 , wherein the first connecting sheet and the first guide sheet are integrally formed parts.

6. The support body according to claim 4 or 5, wherein the thicknesses of the first guide sheet and the first connecting sheet are both smaller than the thickness of the support body.

7. The support according to any one of claims 4 to 6, wherein the first end of the first connection sheet is connected to a first side surface of the support body in the axial direction of the through hole.

8. The support according to any one of claims 4 to 6, wherein the first connection sheet is located within the through hole, and the first end of the first connection sheet is connected to the hole wall of the through hole.

9. A support according to any one of claims 4 to 8, having a gap between two side edges of the first connection sheet arranged opposite each other in the second direction and the hole wall of the through hole.

10. 10. The support according to claim 2, further comprising a second guide portion provided on the support body and facing the first guide portion, for guiding the conductive portion of the electrode assembly to pass through the through hole and connect to the electrode post.

11. 11. The support according to claim 10, wherein the second guide portion includes a second guide sheet extending at an angle in a direction away from the support body, and the second guide sheet is configured to be movable in a direction approaching the support body by the action of the electrode assembly so as to be pressed between the electrode assembly and the pole.

12. The support body of claim 11, wherein a through hole communicating with the through hole is defined between the second guide sheet and the first guide sheet, and the second guide sheet and the first guide sheet extend at an angle in a direction away from the through hole.

13. The support according to claim 12 , wherein the through hole is an elongated hole, and the first guide sheet and the second guide sheet are provided opposite each other in a width direction of the elongated hole.

14. The support of any one of claims 11 to 13, wherein the second guide portion further includes a second connection sheet, a first end of the second connection sheet in the first direction connected to the support body, a second end of the second connection sheet in the first direction extending toward the center position of the through hole and connected to the second guide sheet, and the second guide sheet is configured to be movable in a direction approaching the support body by the action of the electrode assembly so as to be pressed between the electrode assembly and the second connection sheet.

15. The support according to any one of claims 10 to 14, wherein the structure of the first guide portion is the same as the structure of the second guide portion.

16. a case provided with a pole, the case including a case body having a case cover and an opening, the case cover being superimposed on the opening; an electrode assembly including a conductive portion and an active material coated portion provided in the case, the conductive portion electrically connecting the active material coated portion and the electrode post; the support according to any one of claims 1 to 15, which is provided in the case body and located at one end of the active material application section away from the case cover, the electrode pillar includes a first electrode pillar provided on a wall of the case body facing the case cover, the conductive portion includes a first conductive portion provided at one end of the active material application portion away from the case cover, the first conductive portion passing through the through hole and electrically connected to the first electrode pillar, and the first guide portion being located between the active material application portion and the first electrode pillar.

17. The battery cell according to claim 16 , wherein the first pole is provided with a receiving portion, and at least a portion of the first conductive portion is received in the receiving portion and electrically connected to the first pole.

18. 18. The battery cell of claim 17, wherein the accommodating portion includes a first accommodating groove, a surface of the first pole facing the active material coated portion is an inner end face of the pole, an opening of the first accommodating groove is formed in the inner end face of the pole, and at least a portion of the first conductive portion is accommodated in the first accommodating groove.

19. 18. The battery cell of claim 17, wherein the accommodating portion includes a second accommodating groove, a surface of the first pole away from the active material coated portion is an outer end face of the pole, an opening of the second accommodating groove is formed in the outer end face of the pole, the second accommodating groove communicates with the inside of the case through a via hole, and the first conductive portion is inserted into the via hole and is at least partially accommodated in the second accommodating groove.

20. The battery cell according to claim 19 , wherein a partial projection of the first guide portion in a plane in which the via hole is located is located within the via hole.

21. The battery cell according to claim 16 , wherein the first poles include two poles, and two through holes are formed in the support.

22. A battery comprising the battery cell according to any one of claims 16 to 21.

23. An electrical device comprising a battery cell according to any one of claims 16 to 21, or comprising a battery according to claim 22.

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