Battery cell, battery device, power consuming device, and energy storage device

Abstract

This application relates to the field of battery technology, providing a battery cell, a battery device, an electrical device, and an energy storage device. The battery cell includes an electrode structure and an insulating component. The electrode structure includes at least one electrode assembly; the electrode assembly includes a main body and a cluster of tabs disposed on the main body, with a connecting portion on the tab cluster; the electrode structure includes multiple clusters of tabs with the same polarity; at least one insulating component is disposed on the multiple clusters of tabs with the same polarity and covers the connecting portion of the multiple clusters of tabs with the same polarity. During the processing of the battery cell, before welding the tab clusters to the electrode terminals or adapters, an insulating component can be disposed on multiple clusters of tabs with the same polarity. This reduces the number of insulating components, thereby reducing the number of steps required to set the insulating components and simplifying the processing technology of the battery cell. This improves the cumbersome and complex processing technology of battery cells and helps to increase the processing efficiency of battery cells.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and more specifically, relates to a battery cell, a battery device, an electrical device, and an energy storage device. Background Technology

[0002] From a market perspective, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of battery devices continue to expand, the market demand is also constantly increasing. Furthermore, the capacity of battery devices is becoming larger, and the performance requirements for battery devices are becoming increasingly stringent.

[0003] In related technologies, battery devices typically include one or more battery cells, each battery cell including a housing and an electrode assembly disposed within the housing, the electrode assembly including a main body and a cluster of tabs connected to the main body.

[0004] In some cases, a single battery cell includes multiple electrode assemblies, resulting in multiple tab clusters with the same polarity. Therefore, during the battery cell manufacturing process, before soldering the tab clusters to the electrode terminals or the adapters to which they are soldered, tab adhesive needs to be applied to each of the multiple tab clusters with the same polarity. This ensures that after the tab clusters are soldered to the electrode terminals or adapters, the adhesive covers the solder marks on the tab clusters. This results in numerous adhesive application steps, making the battery cell manufacturing process cumbersome, complex, inefficient, and costly.

[0005] The above statements are for the purpose of providing background information in relation to this application only and do not necessarily constitute prior art. Utility Model Content

[0006] In view of the above problems, the embodiments of this application provide a battery cell, a battery device, an electrical device, and an energy storage device, which can improve the technical problem of the cumbersome and complicated processing technology of battery cells.

[0007] In a first aspect, embodiments of this application provide a single battery cell, comprising:

[0008] An electrode structure includes at least one electrode assembly; the electrode assembly includes a main body and a cluster of tabs disposed on the main body, and the cluster of tabs is provided with a connecting portion; the electrode structure includes multiple clusters of tabs with the same polarity.

[0009] An insulating element, at least one insulating element is disposed on a plurality of tabs of the same polarity and covers the connecting portion of the plurality of tabs of the same polarity.

[0010] The battery cell provided in this application embodiment has at least one insulating member disposed on multiple tab clusters of the same polarity, and covering the connecting portion of the multiple tab clusters of the same polarity. This allows the insulating member to be disposed on the multiple tab clusters of the same polarity before welding the tab clusters to the electrode terminals or adapters during the battery cell manufacturing process. This reduces the number of insulating members and thus the number of steps required to install them, simplifying the battery cell manufacturing process. This improves the cumbersome and complex manufacturing process of battery cells, helps to increase the manufacturing efficiency of battery cells, and reduces the manufacturing cost of battery cells.

[0011] In some embodiments, the tab cluster includes a transition portion and a bending portion. The transition portion is disposed on the main body portion, and the bending portion is disposed at the end of the transition portion away from the main body portion and is bent relative to the transition portion and disposed opposite to the main body portion. A connecting portion is disposed on the bending portion, and at least a portion of the insulating member is disposed on the side of the bending portion closer to the main body portion.

[0012] By providing at least a portion of the insulating member on the side of the bend closer to the main body, the insulating member can effectively isolate the connecting portion on the bend from the main body.

[0013] In some embodiments, the battery cell further includes:

[0014] The outer casing and electrode structure are located inside the outer casing;

[0015] Electrode terminals are disposed on the housing, and electrode tabs are connected to the electrode terminals at the connection portion; at least a portion of the insulating member is disposed on the side of the connection portion away from the electrode terminals.

[0016] This configuration allows the tab cluster to connect to the electrode terminal, and at least a portion of the insulating component is located on the side of the connection portion away from the electrode terminal. This enables the insulating component to effectively achieve insulation isolation between the connection portion and the main body, thereby achieving insulation isolation between the electrode terminal and the main body. This improves the problem of solder falling into the main body during the welding process between the electrode terminal and the tab cluster, causing a short circuit between the positive and negative electrodes.

[0017] In some embodiments, the battery cell further includes:

[0018] The outer casing and electrode structure are located inside the outer casing;

[0019] Electrode terminals are located on the outer casing;

[0020] An adapter is disposed between the tab cluster and the electrode terminal and is electrically connected to the electrode terminal; the tab cluster is connected to the adapter at the connection portion, and at least a portion of the insulating member is disposed on the side of the connection portion away from the adapter.

[0021] This configuration allows the tab cluster to connect to the adapter, and at least a portion of the insulating component is located on the side of the connection away from the adapter. This enables the insulating component to effectively achieve insulation isolation between the connection and the main body, thereby achieving insulation isolation between the adapter and the main body. This improves the problem of solder falling onto the main body during the welding process between the adapter and the tab cluster, causing a short circuit between the positive and negative electrodes.

[0022] In some embodiments, multiple tab clusters of the same polarity are spaced apart.

[0023] By arranging multiple tab clusters with the same polarity at intervals, spaces are formed between the tab clusters, allowing them to radiate heat through these spaces. This improves the heat dissipation capacity of the tab clusters, facilitates heat dissipation, and reduces their temperature.

[0024] In some embodiments, the insulating member includes a plurality of spaced-apart first insulating portions and a second insulating portion connected between two adjacent first insulating portions, each first insulating portion being disposed on a corresponding tab cluster and covering the connecting portion of the corresponding tab cluster.

[0025] This configuration allows the insulating element to be placed on multiple tab clusters of the same polarity and to cover the connection portion of multiple tab clusters of the same polarity.

[0026] In some embodiments, the electrode assembly includes a plurality of tab clusters with the same polarity;

[0027] In the electrode structure, at least one insulating member is disposed on a plurality of electrode assemblies with the same polarity and covers the connection portion of the plurality of electrode assemblies with the same polarity; and / or, at least one insulating member is disposed on a plurality of electrode assemblies with the same polarity and covers the connection portion of the plurality of electrode assemblies with the same polarity.

[0028] This configuration allows at least one insulating element to be placed on multiple tab clusters of the same polarity and to cover the connection portion of the multiple tab clusters of the same polarity, thereby effectively reducing the number of steps required to set the insulating element and simplifying the processing technology of the battery cell.

[0029] In some embodiments, there are two electrode assemblies, and the electrode tabs of the two electrode assemblies with the same polarity are arranged in pairs. There are multiple insulating members, each of which is disposed on the two electrode tabs of the group and covers the connection portion of the two electrode tabs of the group.

[0030] This configuration makes it easier to place the insulating components on multiple tab clusters.

[0031] In some embodiments, the tab cluster includes a first tab cluster and a second tab cluster with opposite polarities, and both the first tab cluster and the second tab cluster are disposed on the main body portion;

[0032] The electrode structure includes a plurality of first electrode clusters, and the insulating member includes a first insulating member, at least one first insulating member is disposed on the plurality of first electrode clusters and covers the connection portion of the plurality of first electrode clusters; and / or, the electrode structure includes a plurality of second electrode clusters, and the insulating member includes a second insulating member, at least one second insulating member is disposed on the plurality of second electrode clusters and covers the connection portion of the plurality of second electrode clusters.

[0033] This configuration allows at least one insulating element to be placed on a cluster of tabs with the same positive polarity, or on a cluster of tabs with the same negative polarity.

[0034] In some embodiments, the number of first insulating members is one, the first insulating members are disposed on all the first tab clusters, and cover the connection portion of all the first tab clusters;

[0035] Alternatively, there may be multiple first insulating elements, each of which is disposed on multiple first tab clusters and covers the connection portion of the multiple first tab clusters.

[0036] This configuration helps reduce the number of first insulating components, thereby reducing the number of steps required to install them and simplifying the processing of individual battery cells.

[0037] In some embodiments, the number of second insulating members is one, and the second insulating members are disposed on all the second tab clusters and cover the connection portion of all the second tab clusters;

[0038] Alternatively, there may be multiple second insulating elements, each of which is disposed on multiple second tab clusters and covers the connection portion of the multiple second tab clusters.

[0039] This configuration helps reduce the number of second insulating components, thereby reducing the number of steps required to install them and simplifying the processing of the battery cells.

[0040] In some embodiments, the main body includes at least one first electrode and at least one second electrode with opposite polarities. The main body includes a straight portion, and the first electrode body of the first electrode and the second electrode body of the second electrode are stacked in the straight portion along a first direction. The electrode assembly includes a plurality of first electrode tab clusters, and each first electrode tab cluster includes a plurality of first sub-electrodes arranged along the first direction. The first sub-electrodes are disposed on the first electrode body, and the second electrode tab clusters are disposed on the second electrode body. In the electrode assembly, the number of all first sub-electrodes is greater than 1 / 2 of the number of layers of the first electrode body in the straight portion.

[0041] By ensuring that the number of first sub-tabs in the electrode assembly is greater than half the number of layers of the first electrode body in the flat section, the number of first sub-tabs can be increased, thereby increasing the current-carrying area of ​​the first tab cluster and improving its current-carrying capacity. Furthermore, the presence of first sub-tabs on a larger number of first electrode body layers allows multiple first tab clusters to occupy a larger area of ​​the body along the first direction. This facilitates the transfer of heat and current from the body to the first tab clusters, shortening the current and heat transfer path and thus reducing heat generation and temperature of the first tab clusters.

[0042] In some embodiments, each layer of the first electrode body in the straight portion is provided with a first sub-electrode tab.

[0043] This configuration ensures that each layer of first electrode sheet has a first sub-electrode tab in the first direction. This allows heat and current on each layer of first electrode sheet along the first direction to be directly transferred to the corresponding first sub-electrode tab. The heat and current transfer path is very short, which reduces the heat generation of the first electrode tab cluster and lowers the heat of the first electrode tab cluster.

[0044] In some embodiments, in each first electrode cluster, the number of first sub-electrodes is less than the number of layers of the first electrode body in the straight portion.

[0045] By including multiple first tab clusters of the same polarity in the electrode assembly, and each first tab cluster including multiple first sub-tabs of the same polarity, the number of first sub-tabs of the same polarity can be effectively increased. This allows the current and heat from the main body to be transferred to each first sub-tab of the multiple first tab clusters, thereby effectively increasing the current-carrying area and heat dissipation area of ​​the multiple first tab clusters, improving the heat dissipation capacity of the first tab clusters, and reducing the temperature of the first tab clusters. In this way, the heat dissipation capacity of the battery cell can be effectively improved, thereby reducing the temperature of the battery cell.

[0046] In each first tab cluster, the number of first sub-tabs is less than the number of layers of the first electrode body in the straight section. This reduces the thickness of each first tab cluster, thereby reducing the height space occupied by the first tab cluster after the tab folding operation, and thus reducing the height dimension of the first tab cluster. In this way, while the height dimension of the main body remains unchanged, the electrode assembly can occupy less height space, reducing the height dimension of the battery cell and thus helping to increase the capacity of the battery cell.

[0047] With this configuration, the battery cells can combine the advantages of low temperature and high capacity.

[0048] In some embodiments, the main body has a first end face and a second end face facing away from each other along a second direction, and a first electrode cluster extends from the first end face of the straight portion along a second direction. In the electrode assembly, at least a portion of a plurality of first electrode clusters are spaced apart along a third direction; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0049] By arranging at least a portion of the multiple first tab clusters along a third direction, heat dissipation of the first tab clusters is facilitated, thereby reducing their temperature. Specifically, the arrangement of at least a portion of the multiple first tab clusters along a third direction creates spaces between them, allowing the first tab clusters to radiate heat through these spaces, thus improving their heat dissipation capacity. This effectively enhances the heat dissipation capacity of the battery cell, thereby reducing its temperature.

[0050] In some embodiments, in the third direction, the distance between two adjacent first pole ear clusters is W1, where W1 ∈ [5 mm, 15 mm].

[0051] This configuration allows for a suitable spacing between two adjacent first tab clusters in the third direction, enabling a more reasonable arrangement of multiple first tab clusters. On the one hand, it facilitates increasing the number of first tab clusters; on the other hand, the spacing between two adjacent first tab clusters promotes heat radiation from the first tab clusters, improving their heat dissipation capacity and reducing their temperature, thereby lowering the temperature of the individual battery cells.

[0052] In some embodiments, in the electrode assembly, on the same projection plane perpendicular to a third direction, the orthographic projection of at least one first electrode cluster extends along a first direction beyond the orthographic projection of another first electrode cluster.

[0053] This configuration allows multiple first electrode clusters to occupy a large area of ​​the main body along the first direction, thereby enabling the first sub-electrodes of multiple first electrode clusters to be arranged together on multiple layers of the first electrode body. This helps to reduce the path of heat and current transfer from the main body to the first electrode clusters, that is, it helps to reduce the heat generation of the first electrode clusters and lower the heat of the first electrode clusters.

[0054] In some embodiments, in the electrode assembly, the orthographic projections of a plurality of first electrode clusters are arranged along a first direction on the same projection plane perpendicular to a third direction.

[0055] This configuration ensures that the orthographic projections of multiple first electrode clusters do not overlap on the same projection plane perpendicular to the third direction. This allows multiple first electrode clusters to occupy a larger area of ​​the main body along the first direction, enabling the first sub-electrodes of multiple first electrode clusters to be arranged together on multiple layers of the first electrode body. This helps to reduce the path of heat and current transfer from the main body to the first electrode clusters, that is, it helps to reduce the heat generation of the first electrode clusters and lower the heat of the first electrode clusters.

[0056] In some embodiments, the main body portion has a first end face and a second end face facing away from each other along a second direction, a first electrode cluster extends from the first end face of the straight portion along a second direction, a second electrode cluster extends from the first end face and / or the second end face of the straight portion along a second direction, the main body portion has a third end face along a third direction, and the main body portion has a fourth end face along a first direction. The area of ​​the first end face is smaller than the area of ​​the fourth end face, and the area of ​​the first end face is larger than the area of ​​the third end face; wherein, the first direction, the second direction, and the third direction are mutually perpendicular.

[0057] The first tab cluster extends from the first end face of the straight portion along the second direction. The area of ​​the first end face is smaller than that of the fourth end face, but larger than that of the third end face. This allows the first tab cluster to be positioned on the larger end face of the main body, facilitating a reasonable arrangement of multiple first tab clusters. It is worth noting that the larger first end face provides a larger layout area for the multiple first tab clusters, allowing them to be arranged more dispersedly. Specifically, at least a portion of the multiple first tab clusters can be flexibly arranged along the third direction, enabling heat radiation through the space between them, thus improving their heat dissipation capacity and reducing their temperature. This effectively improves the heat dissipation capacity of the battery cell, thereby reducing its temperature.

[0058] In some embodiments, the electrode assembly includes a plurality of second tab clusters, each second tab cluster including a plurality of second sub-tabs arranged along a first direction, the second sub-tabs being disposed on the second electrode body, and in the electrode assembly, the number of all second sub-tabs is greater than 1 / 2 of the number of layers of the second electrode body in the straight portion.

[0059] By ensuring that the number of second sub-tabs in the electrode assembly is greater than half the number of layers of the second electrode body in the straight section, the number of second sub-tabs can be increased, thereby increasing the current-carrying area of ​​the second tab cluster and improving its current-carrying capacity. Furthermore, since more layers of the second electrode body can have second sub-tabs, multiple second tab clusters can occupy a larger area of ​​the body along the first direction. This facilitates the transfer of heat and current from the body to the second tab clusters, shortening the current and heat transfer path and thus reducing heat generation and lowering the temperature of the second tab clusters.

[0060] In some embodiments, in each second electrode cluster, the number of second sub-electrodes is less than the number of layers of the second electrode body in the straight portion.

[0061] By including multiple second tab clusters of the same polarity in the electrode assembly, and each second tab cluster including multiple second sub-tabs of the same polarity, the number of second sub-tabs of the same polarity can be effectively increased. This allows the current and heat from the main body to be transferred to each second sub-tab of the multiple second tab clusters, thereby effectively increasing the current-carrying area and heat dissipation area of ​​the multiple second tab clusters, improving the heat dissipation capacity of the second tab clusters, and reducing the temperature of the second tab clusters. In this way, the heat dissipation capacity of the battery cell can be effectively improved, thereby reducing the temperature of the battery cell.

[0062] In each second tab cluster, the number of second sub-tabs is less than the number of layers of the second electrode body in the straight section. This reduces the thickness of each second tab cluster, thereby reducing the height space occupied by the second tab cluster after the tab folding operation, and thus reducing the height dimension of the second tab cluster. In this way, while keeping the height dimension of the main body unchanged, the electrode assembly can occupy less height space, reducing the height dimension of the battery cell and thus contributing to increasing the capacity of the battery cell.

[0063] With this configuration, the battery cells can combine the advantages of low temperature and high capacity.

[0064] In some embodiments, the first and second electrode clusters are arranged symmetrically.

[0065] This configuration allows multiple second tab clusters to be arranged using the layout scheme of multiple first tab clusters, which helps the battery cell to balance temperature and capacity.

[0066] In some embodiments, the insulating element is bonded to the tab cluster.

[0067] This simplifies the arrangement of insulating components.

[0068] In some embodiments, on the same projection plane perpendicular to the distribution direction of the insulating element and the connecting portion, the orthographic projection of the insulating element extends beyond the periphery of the orthographic projection of the corresponding connecting portion.

[0069] This design improves the insulation between the connecting part and the main body, thus mitigating the problem of solder falling onto the main body during the welding process of the tab cluster to the electrode terminal or adapter, causing a short circuit between the positive and negative electrodes.

[0070] Secondly, embodiments of this application provide a battery device, including a single battery cell.

[0071] The battery device provided in this application, by employing the aforementioned battery cells, helps to simplify the processing operation of the battery device and improve processing efficiency.

[0072] Thirdly, embodiments of this application provide an electrical device, including a single battery cell or a battery device.

[0073] The electrical device provided in this application, by employing the aforementioned battery cells or battery devices, helps to simplify the processing operation of the electrical device and improve processing efficiency.

[0074] Fourthly, embodiments of this application provide an energy storage device, including a single battery cell or a battery assembly.

[0075] The energy storage device provided in this application, by employing the aforementioned battery cells or battery devices, helps to simplify the processing operation of the energy storage device and improve processing efficiency.

[0076] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0077] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0078] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0079] Figure 2 Exploded views of a battery device provided in some embodiments of this application;

[0080] Figure 3 A three-dimensional structural diagram of a battery cell provided in some embodiments of this application;

[0081] Figure 4 for Figure 3 Sectional view along AA;

[0082] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0083] Figure 6 for Figure 3 A schematic diagram showing the two electrode assemblies and the lower plastic layer of the provided battery cell;

[0084] Figure 7 for Figure 6 Enlarged view of point C in the middle;

[0085] Figure 8 for Figure 6 The diagram shows the mating structure of the structure and insulation components in some examples;

[0086] Figure 9 for Figure 8 Enlarged view of point D in the middle;

[0087] Figure 10 for Figure 8 Sectional view of EE;

[0088] Figure 11 for Figure 10 Enlarged view at point F;

[0089] Figure 12 for Figure 6 The diagram shows the mating structure of the structure and insulation components in some other examples;

[0090] Figure 13 for Figure 12 Enlarged view of point G in the middle;

[0091] Figure 14 for Figure 4 A three-dimensional structural diagram of the provided electrode assembly;

[0092] Figure 15 for Figure 14 Schematic diagrams of the provided electrode assembly in some examples;

[0093] Figure 16 for Figure 14 Schematic diagrams of the provided electrode assembly in other examples;

[0094] Figure 17 A perspective structural diagram of the electrode assembly of a battery cell provided in other embodiments of this application;

[0095] Figure 18 for Figure 17 A schematic diagram of the provided electrode assembly.

[0096] The following are the labeling elements in the figure:

[0097] 1000 - Vehicle; 100 - Battery assembly; 200 - Controller; 300 - Motor; 10 - Battery cell; 1 - Electrode assembly; 101 - First end face; 102 - Second end face; 103 - Third end face; 104 - Fourth end face; 11 - Main body; 111 - First electrode; 1111 - First electrode body; 1112 - First bend; 112 - Second electrode; 1121 - Second electrode body; 1122 - Second bend; 113 - Separator; 12 - Tab cluster; 12a - First tab cluster; 12 b-Second electrode tab cluster; 121-Connecting part; 122-Transition part; 123-Bending part; 124-First sub-electrode tab; 125-Second sub-electrode tab; 2-Outer shell; 21-Shell; 22-End cap; 3-Insulating component; 3a-First insulating component; 3b-Second insulating component; 31-First insulating part; 32-Second insulating part; 4-Electrode terminal; 5-Lower plastic; 20-Box body; 210-First part; 220-Second part; M-Straight part; N-Corner part; Y-First direction; Z-Second direction; X-Third direction. Detailed Implementation

[0098] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0099] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0100] Unless otherwise specified, all technical features and optional technical features of the embodiments of this application can be combined with each other to form new technical solutions.

[0101] In the description of the embodiments of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0102] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0103] In the description of the embodiments of this application, "multiple" means two or more, and unless otherwise explicitly specified, "two or more" includes two. Correspondingly, "multiple groups" means two or more groups, including two groups.

[0104] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0105] In the description of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three possibilities: A exists, A and B exist simultaneously, and B exists. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0106] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "proximity" and "adjacent" refer to proximity in location. For example, among three components A1, A2, and B, if the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, meaning A2 is adjacent to B. Alternatively, B can be said to be adjacent to A2; in other words, A2 is adjacent to B. Similarly, when there are multiple components C, namely C1, C2, ... CN, if one component C, such as C2, is closer to component B than the other components C, then B is adjacent to C2; in other words, C2 is adjacent to B.

[0107] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0108] From a market perspective, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of battery devices continue to expand, the market demand is also constantly increasing. Furthermore, the capacity of battery devices is becoming larger, and the performance requirements for battery devices are becoming increasingly stringent.

[0109] The battery device can be a power battery or an energy storage battery.

[0110] In related technologies, battery devices typically include one or more battery cells, each battery cell including a housing and an electrode assembly disposed within the housing, the electrode assembly including a main body and a cluster of tabs connected to the main body.

[0111] In some cases, a single battery cell includes multiple electrode assemblies, resulting in multiple tab clusters with the same polarity. Therefore, during the battery cell manufacturing process, before soldering the tab clusters to the electrode terminals or the adapters to which they are soldered, tab adhesive needs to be applied to each of the multiple tab clusters with the same polarity. This ensures that after the tab clusters are soldered to the electrode terminals or adapters, the adhesive covers the solder marks on the tab clusters. This results in numerous adhesive application steps, making the battery cell manufacturing process cumbersome, complex, inefficient, and costly.

[0112] For example, in the processing of a single battery cell, electrode adhesive is typically applied one by one to the tab clusters of multiple positive electrodes, followed by one by one to the tab clusters of multiple negative electrodes. Then, the tab clusters of the positive electrodes with adhesive are welded to the electrode terminals or adapters, and the tab clusters of the negative electrodes with adhesive are welded to the electrode terminals or adapters. This process makes the manufacturing of a single battery cell extremely complex and cumbersome.

[0113] Based on the above considerations, embodiments of this application provide a battery cell, a battery device, a power-consuming device, and an energy storage device. At least one insulating member is disposed on multiple tab clusters of the same polarity and covers the connecting portion of the multiple tab clusters of the same polarity. This allows the insulating member to be disposed on multiple tab clusters of the same polarity during the battery cell manufacturing process, before the tab clusters are welded to the electrode terminals or adapters. This reduces the number of insulating members and thus the number of steps required to install them, simplifying the battery cell manufacturing process. This improves the cumbersome and complex manufacturing process of battery cells, helps to increase the manufacturing efficiency of battery cells, and reduces the manufacturing cost of battery cells.

[0114] The battery cell, battery device, power consumption device, and energy storage device provided in this application are developed to address the complex and cumbersome manufacturing process of battery cells, which result from the inclusion of multiple electrode assemblies and the creation of multiple tab clusters with the same polarity. However, their applications are not limited to this. It is understood that they can also be applied when the battery cell includes only one electrode assembly, and that electrode assembly includes multiple tab clusters with the same polarity.

[0115] The battery cell involved in the embodiments of this application refers to the smallest unit used for storing and outputting electrical energy. The battery cell can be a secondary battery or a primary battery. A secondary battery is a battery cell that can be recharged after discharge to activate the active materials and continue to be used.

[0116] The battery cells can be cylindrical, flat, cuboid, or other shapes. Battery cells can be lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0117] The battery device involved in the embodiments of this application can be a single physical module comprising one or more battery cells, used to provide voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel, or in a mixed connection via a busbar. A mixed connection refers to multiple battery cells being connected in both series and parallel configurations.

[0118] In some embodiments, the battery device can be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module. As an example, multiple battery cells can be fixed to form a battery module by cable ties or the like. As an example, multiple battery cells can also be fixed to form a battery module by end plates, side plates, or the like.

[0119] In some embodiments, the battery device can be a battery pack, which may include a housing and individual battery cells. As an example, individual battery cells may be directly housed within the housing. As another example, multiple individual battery cells may first be assembled into one or more battery modules and then housed within the housing.

[0120] The battery cells and battery devices involved in the embodiments of this application can be used in energy storage devices that use battery cells or battery devices as energy storage elements.

[0121] The energy storage device involved in the embodiments of this application can be an energy storage container or an energy storage cabinet.

[0122] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours.

[0123] The energy storage device may include one or more battery clusters, and the battery clusters may include multiple battery devices.

[0124] In some embodiments, multiple battery devices in a battery cluster can be connected in series via a busbar to increase the voltage of the energy storage device.

[0125] In some embodiments, when the energy storage device includes multiple battery clusters, the multiple battery clusters can be connected in parallel to increase the capacity of the energy storage device.

[0126] In some embodiments, the energy storage device may further include a cabinet in which the battery clusters are housed.

[0127] In some embodiments, the energy storage device may further include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0128] In some embodiments, the thermal management module may include a liquid cooling unit that provides coolant to each battery device via piping for regulating the temperature of individual battery cells.

[0129] In some embodiments, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For example, the main control module can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0130] In some embodiments, the central control module can serve as the battery management unit of the energy storage device, used for monitoring and managing the energy storage device. The central control module can monitor information such as the current, voltage, power, state of charge, or temperature of the energy storage device. For example, the central control module can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an insulation monitoring module (IMM), a master battery management unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0131] In some embodiments, the fire protection module may include a control panel, detectors, alarm devices, etc., for detecting, alarming, or extinguishing fires in the energy storage device.

[0132] In some embodiments, the power distribution module can be used to distribute power to modules in the energy storage device that require electricity.

[0133] The battery cell and battery device provided in this application embodiment can also be used in electrical devices that use the battery cell or battery device as a power source.

[0134] Electrical devices can include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. Based on the power source, vehicles can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Based on the drive method, vehicles can be front-wheel drive vehicles, rear-wheel drive vehicles, or four-wheel drive vehicles.

[0135] For ease of description, this application uses a vehicle as an example to illustrate the embodiments of the electrical device.

[0136] In some embodiments, please refer to Figure 1 , Figure 1 This is a schematic diagram of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0137] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0138] In some embodiments, please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 may include a housing 20 and a battery cell 10. The housing 20 is a structure with an internal space for accommodating the battery cell 10.

[0139] The housing 20 can adopt various structures. In some embodiments, the housing 20 may include a first portion 210 and a second portion 220, which overlap each other and together define the internal space of the housing 20, which is a closed space. Here, "closed" means covered or shut off; it can be sealed or unsealed. That is, the housing 20 can be a sealed structure or an unsealed structure. See [link to relevant documentation] for details. Figure 2 Both the first part 210 and the second part 220 can be hollow structures with an opening at one end. The open side of the first part 210 covers the open side of the second part 220, so that the first part 210 and the second part 220 together define the internal space of the box 20. Alternatively, the first part 210 can be a hollow structure with an opening at one end, and the second part 220 is a plate-like structure. The second part 220 covers the open side of the first part 210, so that the first part 210 and the second part 220 together define the internal space of the box 20. The box 20 composed of the first part 210 and the second part 220 can be of various shapes, such as a cylinder, a cuboid, etc.

[0140] In some embodiments, multiple battery cells 10 can be connected in series, parallel, or mixed to form a whole, and then the whole formed by the multiple battery cells 10 is directly housed in the internal space of the housing 20. In other embodiments, multiple battery cells 10 can also be connected in series, parallel, or mixed to form a battery module, and the battery module is housed in the internal space of the housing 20. In still other embodiments, multiple battery cells 10 can also be connected in series, parallel, or mixed to form multiple battery modules, and the multiple battery modules can then be connected in series, parallel, or mixed to form a whole, and housed in the internal space of the housing 20.

[0141] In some embodiments, please combine Figure 1 and Figure 2 The housing 20 of the battery pack 100 can be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 20 can be at least a part of the floor of the vehicle 1000, or a portion of the housing 20 can be at least a part of the crossbeams and longitudinal beams of the vehicle 1000.

[0142] In some embodiments, please refer to the following: Figures 3 to 5 And in conjunction with other accompanying figures. Figure 3 This is a perspective structural diagram of a battery cell 10 provided in some embodiments of this application. Figure 4 for Figure 3 Along the sectional view of AA, 5 is Figure 4 Enlarged view at point B. The battery cell 10 provided in this application embodiment may include an electrode assembly 1 and a housing 2.

[0143] Electrode assembly 1 is the component in the battery cell 10 where the electrochemical reaction occurs. Electrode assembly 1 is mainly formed by winding and placing positive and negative electrode sheets; or, electrode assembly 1 is mainly formed by stacking positive and negative electrode sheets; or, electrode assembly 1 mainly includes positive and negative electrode sheets, with a portion of the positive electrode sheet and a portion of the negative electrode sheet wound together, and the other portions of the positive and negative electrode sheets stacked together. A separator 113 is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body 11 of electrode assembly 1, and the portions of the positive and negative electrode sheets without active material each constitute a tab. The tab of the positive electrode sheet is a positive tab, and the tab of the negative electrode sheet is a negative tab. The positive and negative tabs can be located together at one end of the main body 11; or, the positive and negative tabs can be located at opposite ends of the main body 11.

[0144] In a single battery cell 10, the number of electrode components 1 can be one or more.

[0145] In some embodiments, the battery cell 10 may further include an electrolyte, which acts as a conductor of ions between the positive and negative electrode plates. The electrolyte described in this application embodiment may be liquid, gel-like, or solid.

[0146] The housing 2 is used to define the internal environment of the battery cell 10 and to house the electrode assembly 1 and the electrolyte.

[0147] In some embodiments, please refer to the following: Figures 3 to 5 And in conjunction with other figures. The housing 2 may include a housing 21 and an end cap 22, which are components used to jointly define the internal environment of the battery cell 10. The internal environment defined by the housing 21 and the end cap 22 is used to accommodate the electrode assembly 1 and the electrolyte.

[0148] In some implementations, the housing 21 and the end cap 22 can be independent components. Specifically, the housing 21 has an opening, and the end cap 22 is placed over the opening of the housing 21 to jointly define the internal environment of the battery cell 10 and isolate the internal environment of the battery cell 10 from the external environment.

[0149] In other implementations, the housing 21 and end cap 22 can also be an integrated structure. Specifically, the end cap 22 and housing 21 can form a common connecting surface before the electrode assembly 1 is inserted into the housing. After the electrode assembly 1 is inserted into the housing, when it is necessary to encapsulate the electrode assembly 1, the end cap 22 is then used to close the housing 21. For example, when the battery cell 10 is a pouch battery, the housing 21 and end cap 22 of the battery cell 10 can be formed by punching a hole in the aluminum-plastic film. Then, the electrode assembly 1 is inserted into the internal environment formed by the punching hole in the aluminum-plastic film, and the opening of the aluminum-plastic film is fixed by sealing methods such as side sealing and top sealing. Of course, the battery cell 10 is not limited to a pouch battery, and the material of the housing 21 and end cap 22 is not limited to aluminum-plastic film.

[0150] The outer casing 2 can be either a sealed or unsealed structure. As an example, when the outer casing 2 is a sealed structure, it protects the electrode assembly 1 and, to some extent, prevents leakage such as electrolyte leakage. As an example, when the outer casing 2 is an unsealed structure, it still protects the electrode assembly 1, and a sealing bag may be included between the outer casing 2 and the electrode assembly 1 to encapsulate the electrode assembly 1 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating structure, an aluminum-plastic film, etc.

[0151] Among them, such as Figures 3 to 5 As shown, there can be one end cap 22, which is located at one end of the housing 21. Alternatively, there can be two end caps 22, which are located at opposite ends of the housing 21.

[0152] The housing 21 can be cylindrical, square, or other shapes, depending on the specific shape and size of the electrode assembly. The housing 21 and end cap 22 can also be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic.

[0153] In some embodiments, please refer to the following: Figures 3 to 5 The battery cell 10 may also include electrode terminals 4. Electrode terminals 4 are components with conductive properties, serving as current transmission terminals for the battery cell 10. Electrode terminals 4 may, but are not limited to, being terminals.

[0154] Electrode terminal 4 is electrically connected to electrode assembly 1. Specifically, electrode terminal 4 is electrically connected to the tab of electrode assembly 1. Electrode terminal 4 can be directly electrically connected to the tab through welding, bonding, or other methods, such as... Figure 4 and Figure 5 As shown. Alternatively, an adapter can be provided between electrode terminal 4 and the tab to enable current flow, thereby indirectly achieving a conductive connection between electrode terminal 4 and the tab.

[0155] Among them, the adapter refers to a metal structure with conductive properties, such as, but not limited to, a copper busbar.

[0156] In some embodiments, please refer to the following: Figures 3 to 5 There are two electrode terminals 4, which are a positive electrode terminal and a negative electrode terminal, respectively. The positive electrode terminal is connected to the positive electrode tab of the electrode assembly 1, and the negative electrode terminal is connected to the negative electrode tab of the electrode assembly 1.

[0157] In some embodiments, please refer to Figures 3 to 5 Electrode terminal 4 is disposed on housing 2. Specifically, electrode terminal 4 can be disposed on housing 21 of housing 2. Figures 3 to 5 As shown, electrode terminals 4 can also be disposed on end caps 22 of housing 2.

[0158] The positive electrode terminal and the negative electrode terminal can be simultaneously disposed on the housing 21. Or, as... Figures 3 to 5 As shown, both the positive electrode terminal and the negative electrode terminal are disposed on the end cover 22. Alternatively, one of the positive electrode terminal and the negative electrode terminal may be disposed on the housing 21, and the other on the end cover 22.

[0159] Among them, such as Figures 3 to 5 As shown, the positive electrode terminal and the negative electrode terminal can be located at the same end of the housing 2. Alternatively, as... Figure 13 As shown, the positive electrode terminal and the negative electrode terminal can be respectively located at opposite ends of the outer casing 2.

[0160] In some embodiments, please refer to the following: Figure 3 and Figure 5 The battery cell 10 may also include a lower plastic component 5. The lower plastic component 5 is a plastic part, mainly used to provide insulation within the internal environment of the battery cell 10. Specifically, the lower plastic component 5 is disposed inside the housing 2 and at the end of the electrode assembly 1 where the tabs are located, so as to achieve insulation between the housing 2 and the electrode assembly 1.

[0161] Please refer to the following: Figures 3 to 9 And in conjunction with other accompanying figures. Figure 6 for Figure 3 A schematic diagram showing the unfolded arrangement of the two electrode assemblies 1 and the lower plastic 5 of the provided battery cell 10. Figure 7 for Figure 6 Enlarged view at point C in the middle. Figure 8 for Figure 6 The diagram shows the fit between the structure and the insulating component 3 in some examples. Figure 9 for Figure 8 Enlarged view of point D in the middle. Figures 6 to 9 In the middle, the connecting part 121 is shown through a cross-sectional line. Figure 8 and Figure 9 In the diagram, the tab clusters 12 are demarcated by dashed lines. The battery cell 10 provided in this embodiment includes an electrode structure and an insulating member 3. The electrode structure includes at least one electrode assembly 1. The electrode assembly 1 includes a main body 11 and tab clusters 12 disposed on the main body 11, with connecting portions 121 on the tab clusters 12. The electrode structure includes multiple tab clusters 12 of the same polarity. At least one insulating member 3 is disposed on the multiple tab clusters 12 of the same polarity and covers the connecting portions 121 of the multiple tab clusters 12 of the same polarity.

[0162] The electrode cluster 12 refers to an electrode structure composed of multiple sub-electrodes stacked together. The electrode cluster 12 can be either a positive electrode or a negative electrode.

[0163] The connecting portion 121 refers to the portion on the tab cluster 12 used for making a conductive connection. Specifically, the connecting portion 121 is used for a conductive connection with the electrode terminal 4 or the adapter. As an example, the connecting portion 121 is used for soldering to the electrode terminal 4 or the adapter, and the connecting portion 121 is a solder mark formed by soldering the tab cluster 12 to the electrode terminal 4 or the adapter.

[0164] In some possible designs, such as Figures 4 to 7 As shown, the electrode structure includes multiple electrode components 1.

[0165] The main body 11 of the electrode assembly 1 may be provided with multiple tab clusters 12 of the same polarity, so that one electrode assembly 1 may include multiple tab clusters 12 of the same polarity, thereby making the electrode structure composed of multiple electrode assemblies 1 include multiple tab clusters 12 of the same polarity. Taking the tab cluster 12 of the positive electrode (which may be the first tab cluster 12a mentioned below) as an example, Figure 6 and Figure 7 As shown, the main body 11 of the electrode assembly 1 is provided with a plurality of positive electrode tabs 12, so that the electrode structure composed of a plurality of electrode assemblies 1 may include a plurality of positive electrode tabs 12.

[0166] In this embodiment, the main body 11 of the electrode assembly 1 may also have only one tab cluster 12 of the same polarity, so that one electrode assembly 1 may include one tab cluster 12 of the same polarity, thereby allowing the electrode structure composed of multiple electrode assemblies 1 to include multiple tab clusters 12 of the same polarity. Taking the tab cluster 12 of the negative electrode (which may be the second tab cluster 12b described below) as an example, Figure 6 As shown, a negative electrode tab cluster 12 is provided on the main body 11 of the electrode assembly 1, so that the electrode structure composed of multiple electrode assemblies 1 can include multiple negative electrode tab clusters 12.

[0167] In some other possible designs, the electrode structure may consist of only one electrode assembly 1. The main body 11 of this electrode assembly 1 has multiple tab clusters 12 of the same polarity, and each tab cluster 12 has a connecting portion 121, so that the electrode assembly 1 includes multiple tab clusters 12 of the same polarity, thereby making the electrode structure formed by the electrode assembly 1 include multiple tab clusters 12 of the same polarity. The main body 11 of the electrode assembly 1 may have multiple positive tab clusters 12, or it may include multiple negative tab clusters 12.

[0168] Insulating component 3 refers to a component with insulating properties. Insulating component 3 may be, but is not limited to, tab adhesive.

[0169] At least one insulating member 3 is disposed on a plurality of tab clusters 12 of the same polarity and covers the connecting portion 121 of the plurality of tab clusters 12 of the same polarity. This means that at least one insulating member 3 is disposed on a plurality of tab clusters 12 of the same polarity and covers the connecting portion 121 of the plurality of tab clusters 12 of the same polarity. As an example, such as... Figure 6 and Figure 7 As shown, in at least one insulating member 3, the insulating member 3 is disposed on a plurality of positive electrode tab clusters 12, and covers the connecting portion 121 on the plurality of positive electrode tab clusters 12. As another example, such as Figure 6 As shown, in at least one insulating member 3, the insulating member 3 is disposed on the tab cluster 12 of the plurality of negative electrodes and covers the connecting portion 121 on the tab cluster 12 of the plurality of negative electrodes.

[0170] The battery cell 10 provided in this application embodiment has at least one insulating member 3 disposed on a plurality of tab clusters 12 of the same polarity, and covering the connecting portion 121 of the plurality of tab clusters 12 of the same polarity. This allows the insulating member 3 to be disposed on the plurality of tab clusters 12 of the same polarity during the processing of the battery cell 10, before the tab clusters 12 are welded to the electrode terminals 4 or adapters. This reduces the number of insulating members 3, thereby reducing the number of steps required to install the insulating members 3 and simplifying the processing technology of the battery cell 10. This improves the cumbersome and complex processing technology of the battery cell 10, helps to increase the processing efficiency of the battery cell 10, and reduces the processing cost of the battery cell 10.

[0171] As an example, such as Figures 6 to 9As shown, the electrode structure includes two electrode assemblies 1. Each electrode assembly 1 has two positive electrode tab clusters 12 on its main body 11, and each tab cluster 12 has a connecting portion 121, so that the electrode structure includes four positive electrode tab clusters 12. An insulating member 3 is disposed on two positive electrode tab clusters 12 and covers the connecting portions 121 of the two positive electrode tab clusters 12, so that only two insulating members 3 are disposed on the positive electrode tab clusters 12 of the electrode structure. During the processing of the battery cell 10, the first insulating member 3 can be disposed on two of the positive electrode tab clusters 12 of the electrode structure so that the first insulating member 3 covers the connecting portions 121 on the two positive electrode tab clusters 12 of the electrode structure. Then, the second insulating member 3 is disposed on the other two positive electrode tab clusters 12 of the electrode structure so that the second insulating member 3 covers the connecting portions 121 on the other two positive electrode tab clusters 12 of the electrode structure. In this way, the installation of the insulating element 3 on the tab cluster 12 of the positive electrode only requires two steps, instead of installing the insulating element 3 on each of the four tab clusters 12 of the positive electrode one by one, which can reduce the number of steps for installing the insulating element 3.

[0172] By providing an insulating element 3 on the tab cluster 12 and covering the connecting portion 121 on the tab cluster 12, the insulating element 3 can shape the tab cluster 12, thereby increasing the structural strength of the tab cluster 12 and facilitating subsequent tab bending operations. On the other hand, the insulating element 3 can isolate the connecting portion 121 from the main body 11, achieving insulation between the solder generated during the welding process between the tab cluster 12 and the electrode terminal 4 or adapter and the main body 11. This can improve the problem of solder falling onto the main body 11 during the welding process, causing a short circuit between the positive and negative electrodes.

[0173] In some embodiments, please refer to the following: Figures 4 to 9 And in conjunction with other accompanying drawings. The tab cluster 12 includes a transition portion 122 and a bent portion 123. The transition portion 122 is disposed on the main body portion 11, and the bent portion 123 is disposed at the end of the transition portion 122 away from the main body portion 11. The bent portion 123 is bent relative to the transition portion 122 and is disposed opposite to the main body portion 11. The connecting portion 121 is disposed on the bent portion 123, and at least a portion of the insulating member 3 is disposed on the side of the bent portion 123 closer to the main body portion 11.

[0174] The transition portion 122 and the bending portion 123 are two parts of the tab cluster 12. The bending portion 123 is bent relative to the transition portion 122, so that the bending portion 123 is positioned opposite to the main body portion 11.

[0175] Understandably, at least a portion of the insulating member 3 is provided on the side of the bent portion 123 near the main body portion 11, and covers the connecting portion 121 on the bent portion 123.

[0176] By providing at least a portion of the insulating member 3 on the side of the bend 123 near the main body 11, the insulating member 3 can effectively isolate the connecting portion 121 on the bend 123 from the main body 11.

[0177] The insulating member 3 can also extend from the bending portion 123 to the transition portion 122, thereby expanding the coverage of the insulating member 3 to effectively achieve isolation between the connecting portion 121 on the bending portion 123 and the main body portion 11.

[0178] In some embodiments, please refer to the following: Figures 3 to 11 And in conjunction with other accompanying figures. Figure 10 for Figure 8 Sectional view of EE, Figure 11 for Figure 10 Enlarged view at point F. The battery cell 10 also includes a housing 2 and electrode terminals 4. The electrode structure is disposed inside the housing 2, the electrode terminals 4 are disposed on the housing 2, and the tab cluster 12 is connected to the electrode terminals 4 at the connecting portion 121. At least a portion of the insulating member 3 is disposed on the side of the connecting portion 121 away from the electrode terminals 4.

[0179] As an example, the tab cluster 12 is welded to the electrode terminal 4 at the connection portion 121, such that the connection portion 121 is a solder mark formed by welding the electrode terminal 4 and the tab cluster 12.

[0180] Understandably, at least a portion of the insulating member 3 is disposed on the side of the connection portion 121 away from the electrode terminal 4, and covers the connection portion 121.

[0181] This configuration allows the tab cluster 12 to connect to the electrode terminal 4, and at least a portion of the insulating member 3 is located on the side of the connecting portion 121 away from the electrode terminal 4. This enables the insulating member 3 to effectively achieve insulation isolation between the connecting portion 121 and the main body portion 11, thereby achieving insulation isolation between the electrode terminal 4 and the main body portion 11. This improves the problem of solder falling onto the main body portion 11 during the welding process of the electrode terminal 4 and the tab cluster 12, causing a short circuit between the positive and negative electrodes.

[0182] In some embodiments, the battery cell 10 further includes a housing 2, electrode terminals 4, and an adapter. The electrode structure is disposed within the housing 2, and the electrode terminals 4 are disposed on the housing 2. The adapter is disposed between the tab cluster 12 and the electrode terminals 4, and the adapter is electrically connected to the electrode terminals 4. The tab cluster 12 is connected to the adapter at a connecting portion 121, and at least a portion of the insulating member 3 is disposed on the side of the connecting portion 121 away from the adapter.

[0183] The adapter can be electrically connected to the electrode terminal 4 by welding, riveting, or other means.

[0184] As an example, the tab cluster 12 is welded to the adapter at the connection portion 121, such that the connection portion 121 is a weld mark formed by welding the adapter and the tab cluster 12.

[0185] Understandably, at least a portion of the insulating member 3 is located on the side of the connecting portion 121 away from the adapter and covers the connecting portion 121.

[0186] This configuration allows the tab cluster 12 to connect to the adapter, and at least a portion of the insulating member 3 is located on the side of the connecting portion 121 away from the adapter. This enables the insulating member 3 to effectively achieve insulation isolation between the connecting portion 121 and the main body 11, thereby achieving insulation isolation between the adapter and the main body 11. This improves the problem of solder falling onto the main body 11 during the welding process between the adapter and the tab cluster 12, causing a short circuit between the positive and negative electrodes.

[0187] In some embodiments, please refer to the following: Figures 5 to 7 Furthermore, in conjunction with other accompanying drawings, multiple clusters 12 of identical polarity are spaced apart.

[0188] As an example, such as Figure 6 and Figure 7 As shown, the electrode structure has multiple positive electrode tab clusters 12 spaced apart.

[0189] As another example, such as Figure 6 As shown, the electrode structure has multiple negative electrode tabs 12 arranged at intervals.

[0190] By arranging multiple tab clusters 12 with the same polarity at intervals, a space is formed between the tab clusters 12, allowing the tab clusters 12 to radiate heat through the space formed between them. This improves the heat dissipation capacity of the tab clusters 12, facilitates heat dissipation, and reduces the temperature of the tab clusters 12.

[0191] In some embodiments, please refer to the following: Figure 8 and Figure 9 , Figure 12 and Figure 13 And in conjunction with other accompanying figures. Figure 12 for Figure 6 The diagram shows the fit between the structure shown and the insulating component 3 in other examples. Figure 13 for Figure 12 A magnified view of point G in the middle. Figure 12 and Figure 13In the diagram, the connecting portion 121 is shown in cross-section, and the tab cluster 12 is delineated by dashed lines. The insulating member 3 includes a first insulating portion 31 and a second insulating portion 32. There are multiple first insulating portions 31, which are spaced apart. The second insulating portion 32 connects two adjacent first insulating portions 31. Each first insulating portion 31 is disposed on the corresponding tab cluster 12 and covers the connecting portion 121 of the corresponding tab cluster 12.

[0192] The first insulating part 31 and the second insulating part 32 are two parts of the insulating member 3, both of which have insulating properties.

[0193] The second insulating part 32 is connected between the two first insulating parts 31, meaning that the second insulating part 32 is disposed between the two first insulating parts 31 and connected to the two first insulating parts 31, thereby connecting the two first insulating parts 31 together.

[0194] Understandably, the second insulating part 32 is disposed between two adjacent tab clusters 12.

[0195] As an example, such as Figure 9 As shown, an insulating member 3 is disposed on two tab clusters 12 of the same polarity. Specifically, the insulating member 3 includes two first insulating portions 31 and a second insulating portion 32 disposed between the two first insulating portions 31. In the two first insulating portions 31 and the two tab clusters 12 of the same polarity, each first insulating portion 31 is disposed on each tab cluster 12 and covers the connecting portion 121 on each tab cluster 12.

[0196] As another example, such as Figure 13 As shown, an insulating member 3 is disposed on four tab clusters 12 of the same polarity. Specifically, the insulating member 3 includes four first insulating portions 31 and a second insulating portion 32 disposed between any two first insulating portions 31. In the four first insulating portions 31 and the four tab clusters 12 of the same polarity of the insulating member 3, each first insulating portion 31 is disposed on each tab cluster 12 and covers the connecting portion 121 on each tab cluster 12.

[0197] In this configuration, each tab cluster 12 may have only one first insulating portion 31, such that each first insulating portion 31 corresponds to each tab cluster 12, as shown below. Figure 9 and Figure 13 As shown. Alternatively, a cluster of electrode tabs 12 may also be provided with a plurality of first insulating portions 31 of insulating members 3, such that the first insulating portion 31 of each insulating member 3 corresponds to the cluster of electrode tabs 12; for example, as Figure 8 As shown, in the tab cluster 12 of the negative electrode, the tab cluster 12 is provided with a plurality of connecting parts 121, and each connecting part 121 can be provided with a first insulating part 31, so that a tab cluster 12 can be provided with a plurality of first insulating parts 31 of insulating elements 3.

[0198] This arrangement allows the insulating element 3 to be disposed on multiple tab clusters 12 of the same polarity and to cover the connecting portion 121 of the multiple tab clusters 12 of the same polarity.

[0199] In some embodiments, each first insulating portion 31 may be correspondingly disposed with each tab cluster 12. For example, as Figure 9 As shown, in the tab cluster 12 of the positive electrode, the number of first insulating portions 31 is the same as the number of tab clusters 12.

[0200] In some embodiments, each first insulating portion 31 may be correspondingly provided with each connecting portion 121. For example, such as Figure 8 As shown, in the tab cluster 12 of the negative electrode, the number of first insulating portions 31 can be the same as the number of connecting portions 121. Based on this, one connecting portion 121 can be provided on one tab cluster 12, such that the number of first insulating portions 31 is the same as the number of tab clusters 12; or, as shown... Figure 8 As shown, a tab cluster 12 may be provided with multiple connecting parts 121, such that the number of first insulating parts 31 is greater than the number of tab clusters 12.

[0201] In some embodiments, please refer to the following: Figures 4 to 13 And in conjunction with other accompanying drawings. Electrode assembly 1 includes multiple tab clusters 12 of the same polarity.

[0202] In some possible designs, such as Figures 4 to 11 As shown. In the electrode structure, at least one insulating member 3 is disposed on the tab clusters 12 of the same polarity of the plurality of electrode assemblies 1, and covers the connecting portion 121 of the tab clusters 12 of the plurality of electrode assemblies 1.

[0203] Understandably, in at least one insulating member 3, the insulating member 3 is disposed on the tab clusters 12 of the plurality of electrode assemblies 1 with the same polarity, and covers the connecting portion 121 of the tab clusters 12 of the plurality of electrode assemblies 1 with the same polarity.

[0204] As an example, such as Figures 5 to 11 As shown, the electrode structure includes two electrode assemblies 1, and the main body 11 of the electrode assembly 1 is provided with two positive electrode tab clusters 12. An insulating member 3 is provided on each positive electrode tab cluster 12 of the two electrode assemblies 1, specifically on the two positive electrode tab clusters 12, and covers the connecting portion 121 on the two positive electrode tab clusters 12.

[0205] In some possible designs, such as Figure 12 and Figure 13 As shown, at least one insulating member 3 is disposed on a plurality of tab clusters 12 of the same polarity of the electrode assembly 1, and covers the connecting portion 121 of the plurality of tab clusters 12 of the same polarity of the electrode assembly 1.

[0206] Understandably, in at least one insulating member 3, the insulating member 3 is disposed on a plurality of tab clusters 12 of the same polarity of the electrode assembly 1, and covers the connection portion 121 of the plurality of tab clusters 12 of the same polarity of the electrode assembly 1.

[0207] As an example, such as Figure 12 and Figure 13 As shown, the main body 11 of the electrode assembly 1 is provided with two positive electrode tab clusters 12, and an insulating member 3 is provided on the two positive electrode tab clusters 12 of the electrode assembly 1, and covers the connecting part 121 of the two positive electrode tab clusters 12 of the electrode assembly 1.

[0208] In some possible designs, such as Figure 13 As shown, in at least one insulating member 3, the insulating member 3 is disposed on the tab clusters 12 of the same polarity of the plurality of electrode assemblies 1, and covers the connection portion 121 of the tab clusters 12 of the plurality of electrode assemblies 1; and the insulating member 3 is also disposed on the plurality of tab clusters 12 of the same polarity of the electrode assembly 1, and covers the connection portion 121 of the plurality of tab clusters 12 of the same polarity of the electrode assembly 1.

[0209] As an example, such as Figure 12 and Figure 13 As shown, the electrode structure includes two electrode components 1, each of which includes two positive electrode tab clusters 12, resulting in four positive electrode tab clusters 12 in the electrode structure. An insulating member 3 is disposed on the positive electrode tab clusters 12 of both electrode components 1, and covers the connection portion 121 of the positive electrode tab clusters 12 of both electrode components 1; the insulating member 3 is also disposed on the two positive electrode tab clusters 12 of each electrode component 1, and covers the connection portion 121 of the two positive electrode tab clusters 12 of each electrode component 1. It can be understood that one insulating member 3 is disposed on all four positive electrode tab clusters 12 of the electrode structure, and covers the connection portion 121 of the four positive electrode tab clusters 12 of the electrode structure.

[0210] This configuration allows at least one insulating element 3 to be disposed on multiple tab clusters 12 of the same polarity and to cover the connection portion 121 of multiple tab clusters 12 of the same polarity, thereby effectively reducing the number of steps required to set the insulating element 3 and simplifying the processing technology of the battery cell 10.

[0211] In some embodiments, please refer to the following: Figures 5 to 11 And in conjunction with other accompanying drawings. There are two electrode assemblies 1, and the two electrode assemblies 1 are arranged in pairs with each other's tab clusters 12 having the same polarity. There are multiple insulating members 3, each insulating member 3 is provided on the two tab clusters 12 of the group and covers the connecting portion 121 of the two tab clusters 12 of the group.

[0212] Understandably, in the two electrode assemblies 1, a tab cluster 12 of one electrode assembly 1 is arranged in pairs with a tab cluster 12 of the same polarity of the other electrode assembly 1.

[0213] As an example, such as Figures 5 to 11 As shown, each electrode assembly 1 has two positive electrode tab clusters 12 on its main body 11, resulting in an electrode structure comprising four positive electrode tab clusters 12. The positive electrode tab clusters 12 of the two electrode assemblies 1 are arranged in pairs, forming two groups of four positive electrode tab clusters 12 in the electrode structure. An insulating member 3 is provided on each of the two grouped tab clusters 12, allowing only two insulating members 3 to be provided on each positive electrode tab cluster 12.

[0214] This arrangement facilitates the placement of the insulating element 3 on multiple tab clusters 12.

[0215] In some embodiments, please refer to the following: Figures 6 to 13 And in conjunction with other accompanying drawings. The electrode cluster 12 includes a first electrode cluster 12a and a second electrode cluster 12b, the first electrode cluster 12a and the second electrode cluster 12b are configured to have opposite polarities, and both the first electrode cluster 12a and the second electrode cluster 12b are provided on the main body portion 11.

[0216] In this configuration, the first electrode cluster 12a can be a positive electrode cluster, and the second electrode cluster 12b can be a negative electrode cluster. Alternatively, the first electrode cluster 12a can be a negative electrode cluster, and the second electrode cluster 12b can be a positive electrode cluster.

[0217] In some possible designs, such as Figures 6 to 13 As shown, the electrode structure includes a plurality of first tab clusters 12a, and the insulating member 3 includes a first insulating member 3a. At least one first insulating member 3a is disposed on the plurality of first tab clusters 12a and covers the connecting portion 121 of the plurality of first tab clusters 12a.

[0218] Understandably, in at least one first insulating member 3a, the first insulating member 3a is disposed on a plurality of first tab clusters 12a and covers the connection portion 121 of the plurality of first tab clusters 12a.

[0219] As an example, such as Figure 8 and Figure 9 As shown, each first insulating member 3a is disposed on the two first tab clusters 12a and covers the connecting portion 121 of the two first tab clusters 12a.

[0220] As another example, such as Figure 12 and Figure 13 As shown, each first insulating member 3a is disposed on the four first tab clusters 12a and covers the connecting portion 121 of the four first tab clusters 12a.

[0221] In some possible designs, such as Figures 6 to 13 As shown, the electrode structure includes a plurality of second electrode clusters 12b, and the insulating member 3 includes a second insulating member 3b. At least one second insulating member 3b is disposed on the plurality of second electrode clusters 12b and covers the connecting portion 121 of the plurality of second electrode clusters 12b.

[0222] Understandably, in at least one second insulating member 3b, the second insulating member 3b is disposed on a plurality of second tab clusters 12b and covers the connection portion 121 of the plurality of second tab clusters 12b.

[0223] As an example, such as Figure 8 As shown, each first insulating member 3a is disposed on the two first tab clusters 12a and covers the connecting portion 121 of the two first tab clusters 12a.

[0224] As another example, such as Figure 12 As shown, the first insulating member 3a is disposed on the two first tab clusters 12a and covers the four connecting portions 121 of the two first tab clusters 12a.

[0225] This arrangement allows at least one insulating element 3 to be disposed on a plurality of positive electrode clusters 12 with the same polarity, or on a plurality of negative electrode clusters 12 with the same polarity.

[0226] In some embodiments, please refer to the following: Figure 12 and Figure 13 And in conjunction with other accompanying drawings. The number of first insulating members 3a is one, the first insulating member 3a is provided on all the first tab clusters 12a, and covers the connection portion 121 of all the first tab clusters 12a.

[0227] As an example, such as Figure 12 and Figure 13 As shown, the electrode structure includes two electrode assemblies 1, and each electrode assembly 1 has two first tab clusters 12a on its main body 11, so that the electrode structure has four first tab clusters 12a. A first insulating member 3a is disposed on the four first tab clusters 12a and covers the connecting portion 121 of the four first tab clusters 12a.

[0228] Thus, during the processing of the battery cell 10, before the first tab cluster 12a is welded to the electrode terminal 4 or the adapter, it is possible to simply install a first insulating member 3a on all the first tab clusters 12a.

[0229] In some embodiments, please participate together Figure 8 and Figure 9In conjunction with other accompanying drawings, there are multiple first insulating members 3a, each of which is disposed on multiple first tab clusters 12a and covers the connecting portion 121 of the multiple first tab clusters 12a.

[0230] As an example, such as Figure 8 and Figure 9 As shown, the electrode structure includes two electrode assemblies 1. Each electrode assembly 1 has two first tab clusters 12a on its main body 11, resulting in four first tab clusters 12a in the electrode structure. Two first insulating members 3a may be provided, with each first insulating member 3a disposed on two of the first tab clusters 12a and covering the connection portion 121 of the two first tab clusters 12a.

[0231] Thus, during the processing of the battery cell 10, before the first tab cluster 12a is welded to the electrode terminal 4 or the adapter, two first insulating parts 3a can be sequentially set on the first tab cluster 12a.

[0232] This configuration helps to reduce the number of first insulating elements 3a, thereby reducing the number of steps required to install the first insulating elements 3a and simplifying the processing of the battery cell 10.

[0233] In some embodiments, please refer to the following: Figure 6 and Figure 12 And in conjunction with other accompanying drawings. The number of second insulating members 3b is one, and the second insulating member 3b is provided on all the second tab clusters 12b and covers the connection portion 121 of all the second tab clusters 12b.

[0234] As an example, such as Figure 6 and Figure 12 As shown, the electrode structure includes two electrode assemblies 1, and each electrode assembly 1 has a second tab cluster 12b on its main body 11, so that the electrode structure has two second tab clusters 12b. A second insulating member 3b is disposed on both second tab clusters 12b and covers the connection portion 121 of the two second tab clusters 12b.

[0235] Thus, during the processing of the battery cell 10, before the second tab cluster 12b is welded to the electrode terminal 4 or the adapter, it is possible to set only one second insulating member 3b on all the second tab clusters 12b.

[0236] In some embodiments, please refer to the following: Figure 6 and Figure 8 In conjunction with other accompanying drawings, there are multiple second insulating members 3b, each of which is disposed on multiple second tab clusters 12b and covers the connecting portion 121 of the multiple second tab clusters 12b.

[0237] As an example, such as Figure 6 and Figure 8 The electrode structure includes two electrode assemblies 1. Each electrode assembly 1 has a second tab cluster 12b on its main body 11. Each second tab cluster 12b has two connecting portions 121, so that the electrode structure has two second tab clusters 12b and four connecting portions 121. There are two second insulating members 3b, each of which is disposed on the two second tab clusters 12b and covers two of the connecting portions 121 on the two second tab clusters 12b, so that the two second insulating members 3b together cover the four connecting portions 121.

[0238] Thus, during the processing of the battery cell 10, before the first tab cluster 12a is welded to the electrode terminal 4 or the adapter, two second insulating parts 3b can be sequentially set on the second tab cluster 12b.

[0239] This configuration helps to reduce the number of second insulating elements 3b, thereby reducing the number of steps required to install the second insulating elements 3b and simplifying the processing of the battery cell 10.

[0240] In some embodiments, please refer to the following: Figures 14 to 16 And in conjunction with other accompanying figures. Figure 14 for Figure 4 The provided three-dimensional structural diagram of electrode assembly 1, Figure 15 for Figure 14 A schematic diagram of the provided electrode assembly 1 in some examples. Figure 16 for Figure 14 A schematic diagram of the provided electrode assembly 1 in some other examples. Figure 15 and Figure 16 In the electrode assembly 1, a straight section M and a corner section N are defined by dashed lines. The main body 11 includes at least one first electrode 111 and at least one second electrode 112 with opposite polarities. The main body 11 includes a straight section M, where the first electrode body 1111 of the first electrode 111 and the second electrode body 1121 of the second electrode 112 are stacked along a first direction Y in the straight section M. The electrode assembly 1 includes a plurality of first electrode tab clusters 12a, each first electrode tab cluster 12a including a plurality of first sub-electrode tabs 124 arranged along the first direction Y. The first sub-electrode tabs 124 are disposed on the first electrode body 1111, and the second electrode tab clusters 12b are disposed on the second electrode body 1121. In the electrode assembly 1, the number of all first sub-electrode tabs 124 is greater than half the number of layers of the first electrode body 1111 in the straight section M.

[0241] The polarity of the first electrode 111 is set to be opposite to that of the second electrode 112, and the polarity of the first electrode 111 and the first electrode tab cluster 12a are set to be the same. Specifically, the first electrode 111 can be a positive electrode and the second electrode 112 a negative electrode; or, the first electrode 111 can also be a negative electrode and the second electrode 112 a positive electrode. When the first electrode 111 is a positive electrode, the first electrode tab cluster 12a is a positive electrode tab. When the first electrode 111 is a negative electrode, the first electrode tab cluster 12a is a negative electrode tab.

[0242] The first electrode body 1111 is the main body part 11 of the first electrode 111, and the second electrode body 1121 is the main body part 11 of the second electrode 112.

[0243] The straight portion M is a straight extension of the main body 11. Each first electrode body 1111 and each second electrode body 1121 are stacked along a first direction Y. A diaphragm 113 is disposed between the first electrode bodies 1111 and the second electrode bodies 1121, and the stacked first electrode bodies 1111, second electrode bodies 1121, and diaphragm 113 constitute the straight portion M. The main body 11 may include two corner portions N of the straight portion M. The corner portions N are curved, and the two corner portions N are respectively disposed at both ends of the straight portion M along a third direction X, such as... Figure 14 and Figure 15 As shown; or, the straight portion M may only include the straight portion M, without including the corner portion N.

[0244] In some possible designs, such as Figure 15As shown in the accompanying drawings and in conjunction with other figures, the main body 11 may include a straight portion M and two corner portions N. The corner portions N are curved, and the two corner portions N are respectively located at both ends of the straight portion M along a third direction X. Specifically, the first electrode 111 includes a plurality of first electrode bodies 1111 and a plurality of first curved portions 1112. The first curved portions 1112 are curved, and each first curved portion 1112 is connected between two first electrode bodies 1111 along the extension direction of the first electrode 111. The second electrode 112 includes a plurality of second electrode bodies 1121 and a plurality of second curved portions 1122. The second curved portions 1122 are curved, and each second curved portion 1122 is connected between two second electrode bodies 1121 along the extension direction of the second electrode 112. In the plurality of first electrode bodies 1111 and the plurality of second electrode bodies 1121, each first electrode body 1111 and each second electrode body 1121 is alternately stacked along the first direction Y, and the plurality of first electrode bodies 1111, the plurality of second electrode bodies 1121 and the straight portion M of the diaphragm 113 are stacked to form a straight portion M. In the plurality of first curved portions 1112 and the plurality of second curved portions 1122, each first curved portion 1112 and each second curved portion 1122 is alternately stacked, and the plurality of first curved portions 1112, the plurality of second curved portions 1122 and the curved portion of the diaphragm 113 are stacked to form a corner portion N.

[0245] In this configuration, each first electrode body 1111 and each first bent portion 1112 can be alternately connected and arranged along the extending direction of the first electrode 111, and each second electrode body 1121 and each second bent portion 1122 can be alternately connected and arranged along the extending direction of the second electrode 112, such that the first electrode 111, the second electrode 112, and the diaphragm 113 are wound together to form the main body 11. Figure 15 As shown.

[0246] Alternatively, a portion of the first electrode 111 and a portion of the second electrode 112 may be stacked, and another portion of the first electrode 111 and another portion of the second electrode 112 may be wound together. Specifically, the portion of the first electrode 111 may include a plurality of first electrode bodies 1111, and the portion of the second electrode 112 may include a plurality of second electrode bodies 1121. In the portion of the first electrode 111 and the portion of the second electrode 112, each first electrode body 1111 and each second electrode body 1121 may be stacked along a first direction Y. The other portion of the first electrode 111 includes a plurality of first electrode bodies 1111 and a plurality of first curved portions 1112. In this other portion of the first electrode 111, each first curved portion 1112 is connected between two first electrode bodies 1111 along the extending direction of the first electrode 111. The other portion of the second electrode 112 includes a plurality of second electrode bodies 1121 and a plurality of second curved portions 1122. In this other portion of the second electrode 112, each second curved portion 1122 is connected between two second electrode bodies 1121 along the extending direction of the second electrode 112. In this other portion of the first electrode 111 and the other portion of the second electrode 112, each first electrode body 1111 and each second electrode body 1121 are stacked along a first direction Y, and each first curved portion 1112 and each second curved portion 1122 are alternately stacked. The straight portions M of all the first electrode bodies 1111, all the second electrode bodies 1121 and the diaphragm 113 are stacked to form the straight portion M, and the curved portions N of all the first curved portions 1112, all the second curved portions 1122 and the curved portions of the diaphragm 113 are stacked to form the corner portion N.

[0247] In some other possible designs, the main body 11 only includes the straight portion M, without the corner portion N. The main body 11 is formed by stacking the first electrode 111, the second electrode 112, and the diaphragm 113. Specifically, the first electrode 111 includes multiple first electrode bodies 1111, and the second electrode 112 includes multiple second electrode bodies 1121. The first electrode bodies 1111 and the second electrode bodies 1121 are alternately stacked along a first direction Y, and the straight portions M of the multiple first electrode bodies 1111, the multiple second electrode bodies 1121, and the diaphragm 113 are stacked to form the straight portion M.

[0248] The number of the first pole ear cluster 12a can be two, such as Figure 14 As shown; or, the number of first auricle clusters 12a can also be greater than two.

[0249] The first electrode cluster 12a includes a plurality of first sub-electrodes 124 arranged along the first direction Y, meaning that the first electrode cluster 12a includes a plurality of first sub-electrodes 124 with the same polarity, and the plurality of first sub-electrodes 124 are arranged along the first direction Y to form the first electrode cluster 12a by stacking.

[0250] The first sub-electrode 124 is disposed on the first electrode body 1111, which means that the polarity of the first sub-electrode 124 and the polarity of the first electrode 111 are set to be the same, and the first sub-electrode 124 and the first electrode body 1111 of the first electrode 111 are electrically connected.

[0251] Specifically, the number of layers of the first electrode body 1111 in the straight section M can be the number of layers of the first electrode 111 in the first direction Y.

[0252] As an example, such as Figure 15 As shown, the first electrode body 1111 has 8 layers and the number of first sub-electrode tabs 124 is 8, so that the number of first sub-electrode tabs 124 is greater than 1 / 2 of the number of layers of the first electrode body 1111.

[0253] As another example, such as Figure 16 As shown, the first electrode body 1111 has 8 layers and the first sub-electrode 124 has 11 layers, so that the number of first sub-electrode 124 is greater than 1 / 2 of the number of layers of the first electrode body 1111.

[0254] Among them, the first direction Y is perpendicular to the third direction X.

[0255] By ensuring that the number of all first sub-tabs 124 in the electrode assembly 1 is greater than half the number of layers of the first electrode body 1111 in the straight section M, the number of first sub-tabs 124 can be increased, thereby increasing the current-carrying area of ​​the first tab cluster 12a and improving its current-carrying capacity. Furthermore, the presence of first sub-tabs 124 on a larger number of layers of the first electrode body 1111 allows multiple first tab clusters 12a to occupy a larger area of ​​the body section 11 along the first direction Y. This facilitates the transfer of heat and current from the body section 11 to the first tab clusters 12a, shortening the current and heat transfer path and reducing heat generation and temperature of the first tab clusters 12a.

[0256] In some embodiments, please refer to the following: Figure 15 and Figure 16 Furthermore, in conjunction with other accompanying drawings, each layer of the first pole piece body 1111 in the straight section M is provided with a first sub-pole tab 124.

[0257] This configuration ensures that each layer of first electrode 111 is provided with a first sub-electrode 124 in the first direction Y. This allows the heat and current on each layer of first electrode 111 along the first direction Y to be directly transferred to the corresponding first sub-electrode 124. The heat and current transfer path is very short, which reduces the heat generation of the first electrode cluster 12a and lowers the heat of the first electrode cluster 12a.

[0258] In some embodiments, please refer to the figures and other accompanying drawings. In each first electrode cluster 12a, the number of first sub-electrode ears 124 is less than the number of layers of the first electrode body 1111 in the straight portion M.

[0259] As an example, such as Figure 15 As shown, the first electrode body 1111 has 8 layers, and the number of first sub-electrode ears 124 of the two first electrode ear clusters 12a are 5 and 3 respectively, both less than the number of layers of the first electrode body 1111.

[0260] As another example, such as Figure 16 As shown, the first electrode body 1111 has 8 layers, and the number of first sub-electrode ears 124 of the two first electrode ear clusters 12a are 6 and 5 respectively, both less than the number of layers of the first electrode body 1111.

[0261] The electrode assembly 1 includes multiple first tab clusters 12a of the same polarity, and each first tab cluster 12a includes multiple first sub-tabs 124 of the same polarity. This effectively increases the number of first sub-tabs 124 of the same polarity, allowing the current and heat from the main body 11 to be transferred to each of the first sub-tabs 124 of the multiple first tab clusters 12a. This effectively increases the current-carrying area and heat dissipation area of ​​the multiple first tab clusters 12a, improving their heat dissipation capacity and reducing their temperature. Thus, the heat dissipation capacity of the battery cell 10 can be effectively improved, thereby reducing its temperature.

[0262] In each of the first tab clusters 12a, the number of first sub-tabs 124 is less than the number of layers of the first electrode body 1111 in the straight portion M. This reduces the thickness of each first tab cluster 12a, thereby reducing the height space occupied by the first tab cluster 12a after the tab folding operation, and thus reducing the height dimension of the first tab cluster 12a. In this way, while the height dimension of the main body 11 remains unchanged, the electrode assembly 1 can occupy a smaller height space, reducing the height dimension of the battery cell 10, thereby helping to increase the capacity of the battery cell 10. Here, height dimension refers to the dimension in the height direction, and height space refers to the space in the height direction, where the height direction is the second direction Z.

[0263] With this configuration, the battery cell 10 can combine the advantages of low temperature and high capacity.

[0264] Wherein, the first direction Y is perpendicular to the second direction Z, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0265] As an example, such as Figure 3 and Figure 14As shown, the first direction Y is the thickness direction of the battery cell 10, the second direction Z is the height direction of the battery cell 10, and the third direction X is the width direction of the battery cell 10.

[0266] In some embodiments, please refer to Figure 14 In conjunction with other accompanying drawings, the main body 11 has a first end face 101 and a second end face 102 facing away from each other along the second direction Z, and the first tab cluster 12a extends out from the first end face 101 of the straight portion M along the second direction Z.

[0267] In some embodiments, please refer to Figure 14 And in conjunction with other accompanying drawings. In the electrode assembly 1, at least a portion of a plurality of first tab clusters 12a are spaced apart along a third direction X. Wherein, the first direction Y and the second direction Z are perpendicular, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0268] The first tab cluster 12a extends from the first end face 101 of the straight portion M along the second direction, meaning that the first tab cluster 12a is disposed on the portion of the first end face 101 on the straight portion M, and at least a portion of the first tab cluster 12a and the main body portion 11 are distributed approximately along the second direction Z, where the second direction Z is the height direction of the battery cell 10.

[0269] At least a portion of the plurality of first electrode clusters 12a are arranged along a third direction X, meaning that the plurality of first electrode clusters 12a are arranged along a third direction X; for example, as Figures 14 to 16 As shown, the electrode assembly 1 includes two first tab clusters 12a, which are arranged along a third direction X. Alternatively, it refers to a plurality of first tab clusters 12a, only a portion of which are arranged along a third direction X; for example, the electrode assembly 1 includes three first tab clusters 12a, in which the first and second first tab clusters 12a are arranged along a third direction X, and the third first tab cluster 12a faces the first first tab cluster 12a along a first direction Y, but is not arranged along a third direction X.

[0270] By arranging at least a portion of the plurality of first tab clusters 12a along a third direction X, heat dissipation of the first tab clusters 12a is facilitated, thereby reducing the temperature of the first tab clusters 12a. Specifically, the arrangement of at least a portion of the plurality of first tab clusters 12a along a third direction X creates spaces between them, allowing the first tab clusters 12a to radiate heat through these spaces, thus improving their heat dissipation capacity and facilitating heat dissipation. In this way, the heat dissipation capacity of the battery cell 10 can be effectively improved, thereby reducing the temperature of the battery cell 10.

[0271] In some embodiments, please refer to Figure 15 In conjunction with other accompanying figures, the distance between two adjacent first pole ear clusters 12a in the third direction X is W, where W ∈ [5 mm, 15 mm].

[0272] Understandably, the distance between two adjacent first anode clusters 12a along the third direction X is W. Specifically, W can be 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, etc.

[0273] This configuration allows for a suitable spacing between two adjacent first tab clusters 12a in the third direction X. This enables a more reasonable arrangement of multiple first tab clusters 12a. On the one hand, it facilitates increasing the number of first tab clusters 12a. On the other hand, the spacing between two adjacent first tab clusters 12a is conducive to the heat radiation of the first tab clusters 12a, which can improve the heat dissipation capacity of the first tab clusters 12a, reduce the temperature of the first tab clusters 12a, and thus reduce the temperature of the battery cell 10.

[0274] In some embodiments, please refer to the following: Figure 15 and Figure 16 And in conjunction with other accompanying drawings. In electrode assembly 1, on the same projection plane perpendicular to the third direction X, the orthographic projection of at least one first tab cluster 12a extends along the first direction Y beyond the orthographic projection of another first tab cluster 12a.

[0275] In some possible designs, such as Figure 15 As shown, on the same projection plane perpendicular to the third direction X, the orthographic projections of at least one first anode cluster 12a and the orthographic projection of another first anode cluster 12a are distributed along the first direction Y without overlapping; that is, on the same projection plane perpendicular to the third direction X, the orthographic projections of at least two first anode clusters 12a are distributed along the first direction Y without overlapping. As an example, such as... Figure 15 As shown, the electrode assembly 1 includes two first electrode clusters 12a. On the same projection plane perpendicular to the third direction X, the orthographic projections of the two first electrode clusters 12a are distributed along the first direction Y without overlapping.

[0276] Or, in some other possible settings, such as Figure 16As shown, on the same projection plane perpendicular to the third direction X, a portion of the orthographic projection of at least one first anode cluster 12a and a portion of the orthographic projection of another first anode cluster 12a are distributed along the first direction Y, and the other portions of the orthographic projection of at least one first anode cluster 12a and the other portions of the orthographic projection of another first anode cluster 12a overlap. That is, on the same projection plane perpendicular to the third direction X, a portion of the orthographic projection of at least two first anode clusters 12a is distributed along the first direction Y, and the other portions of the orthographic projection overlap. As an example, such as Figure 16 As shown, the electrode assembly 1 includes two first electrode clusters 12a. On the same projection plane perpendicular to the third direction X, a portion of the orthographic projection of the first first electrode cluster 12a and a portion of the orthographic projection of the second first electrode cluster 12a are distributed along the first direction Y, and the other portion of the orthographic projection of the first first electrode cluster 12a and the other portion of the orthographic projection of the second first electrode cluster 12a are overlapped.

[0277] This arrangement allows multiple first electrode clusters 12a to occupy a larger area of ​​the main body 11 along the first direction Y, thereby enabling the first sub-electrodes 124 of multiple first electrode clusters 12a to be arranged together on multiple layers of first electrode body 1111. This helps to reduce the path of heat and current transfer from the main body 11 to the first electrode clusters 12a, that is, it helps to reduce the heat generation of the first electrode clusters 12a and lower the heat of the first electrode clusters 12a.

[0278] In some embodiments, please refer to Figure 15 And in conjunction with other accompanying drawings. In electrode assembly 1, on the same projection plane perpendicular to the third direction X, the orthographic projections of a plurality of first tab clusters 12a are arranged along the first direction Y.

[0279] Understandably, on the same projection plane perpendicular to the third direction X, the orthographic projections of multiple first anode clusters 12a are arranged along the first direction Y without overlapping.

[0280] As one example, such as Figure 15 As shown, the electrode assembly 1 includes two first tab clusters 12a, which are arranged along a third direction X. On the same projection plane perpendicular to the third direction X, the orthographic projections of the two first tab clusters 12a are distributed along a first direction Y without overlapping.

[0281] This configuration ensures that the orthographic projections of multiple first electrode clusters 12a do not overlap on the same projection plane perpendicular to the third direction X. This allows multiple first electrode clusters 12a to occupy a larger area of ​​the main body 11 along the first direction Y, thereby enabling the first sub-electrodes 124 of multiple first electrode clusters 12a to be arranged together on multiple layers of first electrode body 1111. This helps to reduce the path of heat and current transfer from the main body 11 to the first electrode clusters 12a, that is, it helps to reduce the heat generation of the first electrode clusters 12a and lower the heat of the first electrode clusters 12a.

[0282] In some embodiments, please refer to Figure 14 And in conjunction with other accompanying drawings. The main body 11 has a first end face 101 and a second end face 102 facing away from each other along the second direction Z. A first tab cluster 12a extends from the first end face 101 of the straight portion M along the second direction Z. A second tab cluster 12b extends from the first end face 101 and / or the second end face 102 of the straight portion M along the second direction Z. The main body 11 has a third end face 103 along the third direction X, and a fourth end face 104 along the first direction Y. The area of ​​the first end face 101 is smaller than the area of ​​the fourth end face 104, and the area of ​​the first end face 101 is larger than the area of ​​the third end face 103. Wherein, the first direction Y is perpendicular to the second direction Z, the first direction Y is perpendicular to the third direction X, and the second direction Z is perpendicular to the third direction X.

[0283] The second pole tab clusters 12b extend from the first end face 101 and / or the second end face 102 of the straight portion M along the second direction Z. This means that all of the second pole tab clusters 12b extend from the first end face 101 of the straight portion M along the second direction Z; or, all of the second pole tab clusters 12b extend from the second end face 102 of the straight portion M along the second direction Z; or, of the multiple second pole tab clusters 12b, a portion of the second pole tab clusters 12b can extend from the first end face 101 of the straight portion M along the second direction Z, while another portion of the second pole tab clusters 12b extends from the second end face 102 of the straight portion M along the second direction Z. Furthermore, at least a portion of the second pole tab clusters 12b and the main body portion 11 are arranged along the second direction Z.

[0284] The third end face 103 can be a curved corner surface or a flat surface. As an example, such as... Figure 14 and Figure 15 As shown, when the main body 11 includes the corner part N, the third end face 103 is a semi-cylindrical surface.

[0285] The first tab cluster 12a extends from the first end face 101 of the straight portion M along the second direction Z. The area of ​​the first end face 101 is smaller than that of the fourth end face 104, and larger than that of the third end face 103. This allows the first tab cluster 12a to be positioned on the larger end face of the main body 11, facilitating a reasonable arrangement of multiple first tab clusters 12a. It is worth noting that the larger first end face 101 provides a larger layout area for the multiple first tab clusters 12a, allowing them to be arranged more dispersedly. Specifically, at least a portion of the multiple first tab clusters 12a can be flexibly arranged along the third direction X, enabling heat radiation through the space between them, improving their heat dissipation capacity, and reducing their temperature. This effectively improves the heat dissipation capacity of the battery cell 10, thereby reducing its temperature.

[0286] It should be further explained that the plurality of second pole tab clusters 12b are all led out from the first end face 101 of the straight portion M along the second direction Z, and at least a portion of the plurality of second pole tab clusters 12b are arranged along the third direction X. Alternatively, the plurality of second pole tab clusters 12b are all led out from the second end face 102 of the straight portion M along the second direction Z, and at least a portion of the plurality of second pole tab clusters 12b are arranged along the third direction X. Alternatively, of the plurality of second pole tab clusters 12b, a portion is led out from the first end face 101 of the straight portion M along the second direction Z, and at least a portion of the second pole tab clusters 12b led out from the first end face 101 of the straight portion M along the second direction Z are arranged along the third direction X, and another portion is led out from the second end face 102 of the straight portion M along the second direction Z, and at least a portion of the second pole tab clusters 12b led out from the second end face 102 of the straight portion M along the second direction Z are arranged along the third direction X.

[0287] In some embodiments, please refer to the following: Figure 17 and Figure 18 And in conjunction with other accompanying figures. Figure 17 This is a perspective view of the electrode assembly 1 of the battery cell 10 provided in other embodiments of this application. Figure 18 for Figure 17 A schematic diagram of the provided electrode assembly 1. Figure 18 In the diagram, electrode assembly 1 is divided into a straight section M and a corner section N by dashed lines. Electrode assembly 1 includes multiple second tab clusters 12b, each second tab cluster 12b including multiple second sub-tabs 125 arranged along a first direction Y, the second sub-tabs 125 being disposed on the second electrode body 1121. In electrode assembly 1, the number of all second sub-tabs 125 is greater than 1 / 2 the number of layers of the second electrode body 1121 in the straight section M.

[0288] Specifically, the number of layers of the second pole piece body 1121 in the straight section M can be the number of layers of the second pole piece 112 in the first direction Y.

[0289] As an example, such as Figure 18 As shown, the second electrode body 1121 has 6 layers and the number of second sub-electrode tabs 125 is 6, so that the number of second sub-electrode tabs 125 is greater than 1 / 2 of the number of layers of the second electrode body 1121.

[0290] By ensuring that the number of all second sub-tabs 125 in the electrode assembly 1 is greater than half the number of layers of the second electrode body 1121 in the straight section M, the number of second sub-tabs 125 can be increased, thereby increasing the current-carrying area of ​​the second tab cluster 12b and improving its current-carrying capacity. Furthermore, by providing second sub-tabs 125 on a larger number of layers of the second electrode body 1121, multiple second tab clusters 12b can occupy a larger area of ​​the body section 11 along the first direction Y. This facilitates the transfer of heat and current from the body section 11 to the second tab clusters 12b, shortening the current and heat transfer path and thus reducing heat generation and temperature of the second tab clusters 12b.

[0291] In some embodiments, please refer to Figure 18 Furthermore, in conjunction with other accompanying drawings, in each of the second electrode clusters 12b, the number of second sub-electrode ears 125 is less than the number of layers of the second electrode body 1121 in the straight portion M.

[0292] As an example, such as Figure 18 As shown, the second pole body 1121 has 6 layers, and the number of second sub-pole ears 125 of the two second pole ear clusters 12b are 4 and 2 respectively, both less than the number of layers of the second pole body 1121.

[0293] By including multiple second tab clusters 12b of the same polarity in the electrode assembly 1, and each second tab cluster 12b including multiple second sub-tabs 125 of the same polarity, the number of second sub-tabs 125 of the same polarity can be effectively increased. This allows the current and heat of the main body 11 to be transferred to each second sub-tab 125 of the multiple second tab clusters 12b, thereby effectively increasing the current-carrying area and heat dissipation area of ​​the multiple second tab clusters 12b, improving the heat dissipation capacity of the second tab clusters 12b, and reducing the temperature of the second tab clusters 12b. In this way, the heat dissipation capacity of the battery cell 10 can be effectively improved, thereby reducing the temperature of the battery cell 10.

[0294] In each of the second tab clusters 12b, the number of second sub-tabs 125 is less than the number of layers of the second electrode body 1121 in the straight portion M. This reduces the thickness of each second tab cluster 12b, thereby reducing the height space occupied by the second tab cluster 12b after the tab folding operation, and thus reducing the height dimension of the second tab cluster 12b. In this way, while the height dimension of the main body 11 remains unchanged, the electrode assembly 1 can occupy a smaller height space, reducing the height dimension of the battery cell 10, thereby helping to increase the capacity of the battery cell 10.

[0295] With this configuration, the battery cell 10 can combine the advantages of low temperature and high capacity.

[0296] In some embodiments, the first tab cluster 12a and the second tab cluster 12b are arranged symmetrically.

[0297] It should be noted that when a second pole tab cluster 12b is extended from the first end face 101 of the straight portion M along the second direction Z, the first pole tab cluster 12a extended from the first end face 101 of the straight portion M along the second direction Z and the second pole tab cluster 12b extended from the second end face 102 of the straight portion M along the second direction Z are arranged approximately symmetrically with respect to the central axis parallel to the first direction Y.

[0298] When a second pole tab cluster 12b is extended from the second end face 102 of the straight portion M along the second direction Z, the first pole tab cluster 12a extended from the first end face 101 of the straight portion M along the second direction Z and the second pole tab cluster 12b extended from the second end face 102 of the straight portion M along the second direction Z are arranged approximately symmetrically with respect to the central axis parallel to the first direction Y.

[0299] This configuration allows multiple second tab clusters 12b to be arranged in a layout scheme that incorporates multiple first tab clusters 12a, which helps the battery cell 10 to balance temperature and capacity.

[0300] In some embodiments, the insulating element 3 is bonded to the tab cluster 12.

[0301] Understandably, the insulating element 3 can be attached to the tab cluster 12 by means of adhesive bonding.

[0302] This simplifies the arrangement of the insulating component 3.

[0303] In some embodiments, please refer to the following: Figure 8 and Figure 9 , Figure 12 and Figure 13 Furthermore, in conjunction with other accompanying drawings, on the same projection plane perpendicular to the distribution direction of the insulating member 3 and the connecting portion 121, the orthographic projection of the insulating member 3 extends beyond the periphery of the orthographic projection of the corresponding connecting portion 121.

[0304] Understandably, the insulating member 3 completely covers the connecting part 121, so that the insulating member 3 can effectively achieve the insulation isolation effect between the connecting part 121 and the main body part 11.

[0305] This configuration improves the insulation between the connecting part 121 and the main body 11, thus mitigating the problem of solder falling onto the main body 11 during the welding process of the tab cluster 12 and the electrode terminal 4 or the adapter, causing a short circuit between the positive and negative electrodes.

[0306] Please see Figure 2 The battery device 100 provided in this application embodiment includes a battery cell 10. The battery cell 10 in this embodiment is the same as the battery cell 10 in the above embodiments; please refer to the relevant descriptions of the battery cell 10 in the above embodiments for details, which will not be repeated here.

[0307] The battery device 100 provided in this application adopts the battery cell 10 involved in the above embodiments, which helps to simplify the processing operation of the battery device 100 and improve the processing efficiency.

[0308] Please see Figure 1 The electrical device provided in this application embodiment includes a battery cell 10 or a battery device 100. The battery cell 10 and battery device 100 in this embodiment are the same as those in the above embodiments; please refer to the relevant descriptions of the battery cell 10 and battery device 100 in the above embodiments for details, which will not be repeated here.

[0309] The electrical device provided in this application, by employing the battery cell 10 or battery device 100 mentioned above, helps to simplify the processing operation of the electrical device and improve processing efficiency.

[0310] The energy storage device provided in this application includes a battery cell 10 or a battery device 100. The battery cell 10 and battery device 100 in this embodiment are the same as those in the above embodiments. For details, please refer to the relevant descriptions of the battery cell 10 and battery device 100 in the above embodiments; they will not be repeated here.

[0311] The energy storage device provided in this application, by employing the aforementioned battery cell 10 or battery device 100, helps to simplify the processing operation of the energy storage device and improve processing efficiency.

[0312] As one embodiment of this application, such as Figure 12 and Figure 13As shown, the battery cell 10 includes an electrode structure, a first insulating member 3a, and a second insulating member 3b. The electrode structure includes two electrode assemblies 1, each of which includes a main body 11, a first tab cluster 12a, and a second tab cluster 12b. The first tab clusters 12a and 12b are configured with opposite polarities, and each of the first tab clusters 12a and 12b has a connecting portion 121. Each electrode assembly 1 has multiple first tab clusters 12a. The first insulating member 3a is disposed on all the first tab clusters 12a of the electrode structure and covers the connecting portions 121 on all the first tab clusters 12a. The second insulating member 3b is disposed on all the second tab clusters 12b of the electrode structure and covers the connecting portions 121 on all the second tab clusters 12b. The connecting portions 121 are solder marks.

[0313] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery cell, characterized by, include: An electrode structure includes at least one electrode assembly; the electrode assembly includes a main body and a cluster of tabs disposed on the main body, the cluster of tabs being provided with a connecting portion; the electrode structure includes a plurality of the clusters of tabs with the same polarity. An insulating element, at least one of the insulating elements is disposed on a plurality of tab clusters of the same polarity and covers the connecting portion of the plurality of tab clusters of the same polarity.

2. The battery cell of claim 1, wherein, The tab cluster includes a transition portion and a bending portion. The transition portion is disposed on the main body portion, and the bending portion is disposed at the end of the transition portion away from the main body portion, and is bent relative to the transition portion and disposed opposite to the main body portion. The connecting portion is disposed on the bending portion, and at least a portion of the insulating member is disposed on the side of the bending portion closer to the main body portion.

3. The battery cell of claim 1, wherein, The battery cell also includes: The outer casing, wherein the electrode structure is disposed within the outer casing; An electrode terminal is disposed on the housing, and the tab cluster is connected to the electrode terminal at the connection portion; at least a portion of the insulating member is disposed on the side of the connection portion away from the electrode terminal.

4. The battery cell of claim 1, wherein, The battery cell also includes: The outer casing, wherein the electrode structure is disposed within the outer casing; Electrode terminals are disposed on the outer casing; An adapter is disposed between the tab cluster and the electrode terminal and is electrically connected to the electrode terminal; the tab cluster is connected to the adapter at the connection portion, and at least a portion of the insulating member is disposed on the side of the connection portion away from the adapter.

5. The battery cell of any one of claims 1-4, wherein, Multiple tab clusters of the same polarity are spaced apart.

6. The battery cell of claim 5, wherein, The insulating member includes a plurality of spaced-apart first insulating portions and a second insulating portion connected between two adjacent first insulating portions. Each first insulating portion is disposed on the corresponding tab cluster and covers the connecting portion of the corresponding tab cluster.

7. The battery cell according to any one of claims 1-4, characterized in that, The electrode assembly includes multiple electrode clusters with the same polarity; In the electrode structure, at least one of the insulating members is disposed on the tab clusters of the plurality of electrode assemblies with the same polarity, and covers the connecting portion of the tab clusters of the plurality of electrode assemblies with the same polarity; and / or, at least one of the insulating members is disposed on the plurality of tab clusters of the electrode assembly with the same polarity, and covers the connecting portion of the plurality of tab clusters of the electrode assembly with the same polarity.

8. The battery cell of claim 7, wherein, The number of electrode assemblies is two, and the electrode tabs of the two electrode assemblies with the same polarity are arranged in pairs. The number of insulating members is multiple, and each insulating member is disposed on the two electrode tabs of the group and covers the connecting part of the two electrode tabs of the group.

9. The battery cell of any one of claims 1-4, wherein, The electrode cluster includes a first electrode cluster and a second electrode cluster with opposite polarities, and both the first electrode cluster and the second electrode cluster are disposed on the main body. The electrode structure includes a plurality of first electrode clusters, the insulating member includes a first insulating member, at least one first insulating member is disposed on the plurality of first electrode clusters and covers the connecting portion of the plurality of first electrode clusters; and / or, the electrode structure includes a plurality of second electrode clusters, the insulating member includes a second insulating member, at least one second insulating member is disposed on the plurality of second electrode clusters and covers the connecting portion of the plurality of second electrode clusters.

10. The battery cell of claim 9, wherein, The number of the first insulating members is one, and the first insulating member is disposed on all the first tab clusters and covers the connection portion of all the first tab clusters; Alternatively, there may be multiple first insulating elements, each of which is disposed on multiple first tab clusters and covers the connecting portion of the multiple first tab clusters.

11. The battery cell of claim 9, wherein, The number of the second insulating member is one, and the second insulating member is disposed on all the second tab clusters and covers the connection portion of all the second tab clusters; Alternatively, there may be multiple second insulating elements, each of which is disposed on multiple second tab clusters and covers the connecting portion of the multiple second tab clusters.

12. The battery cell of claim 9, wherein, The main body includes at least one first electrode and at least one second electrode with opposite polarities. The main body includes a straight portion, in which the first electrode body of the first electrode and the second electrode body of the second electrode are stacked along a first direction in the straight portion. The electrode assembly includes a plurality of first electrode tab clusters, each first electrode tab cluster including a plurality of first sub-electrodes arranged along the first direction. The first sub-electrodes are disposed on the first electrode body, and the second electrode tab clusters are disposed on the second electrode body. In the electrode assembly, the number of all first sub-electrodes is greater than 1 / 2 of the number of layers of the first electrode body in the straight portion.

13. The battery cell of claim 12, wherein, Each layer of the first electrode body in the straight section is provided with the first sub-electrode tab.

14. The battery cell of claim 12, wherein, In each of the first electrode clusters, the number of first sub-electrodes is less than the number of layers of the first electrode body in the straight portion.

15. The battery cell of claim 12, wherein, The main body is provided with a first end face and a second end face facing away from each other along the second direction. The first electrode cluster extends from the first end face of the straight part along the second direction. In the electrode assembly, at least a portion of the plurality of first electrode clusters are spaced apart along a third direction. The first direction, the second direction and the third direction are perpendicular to each other.

16. The battery cell of claim 15, wherein, In the third direction, the distance between two adjacent first pole ear clusters is W1, where W1 ∈ [5mm, 15mm].

17. The battery cell of claim 15, wherein, In the electrode assembly, on the same projection plane perpendicular to the third direction, the orthographic projection of at least one of the first electrode clusters extends along the first direction beyond the orthographic projection of the other first electrode cluster.

18. The battery cell of claim 17, wherein, In the electrode assembly, on the same projection plane perpendicular to the third direction, the orthographic projections of a plurality of first electrode clusters are arranged along the first direction.

19. The battery cell of claim 12, wherein, The main body has a first end face and a second end face facing away from each other along a second direction. The first electrode cluster extends from the first end face of the straight portion along the second direction. The second electrode cluster extends from the first end face and / or the second end face of the straight portion along the second direction. The main body has a third end face along a third direction. The main body has a fourth end face along a first direction. The area of ​​the first end face is smaller than the area of ​​the fourth end face, and the area of ​​the first end face is larger than the area of ​​the third end face. The first direction, the second direction, and the third direction are perpendicular to each other.

20. The battery cell of claim 12, wherein, The electrode assembly includes a plurality of second electrode tab clusters, each second electrode tab cluster including a plurality of second sub-electrodes arranged along the first direction. The second sub-electrodes are disposed on the second electrode body. In the electrode assembly, the total number of all second sub-electrodes is greater than 1 / 2 of the number of layers of the second electrode body in the straight portion.

21. The battery cell of claim 20, wherein, In each of the second electrode clusters, the number of second sub-electrodes is less than the number of layers of the second electrode body in the straight portion.

22. The battery cell of claim 20, wherein, The first and second electrode clusters are arranged symmetrically.

23. The battery cell of any one of claims 1-4, wherein, The insulating element is bonded to the tab cluster.

24. The battery cell of any one of claims 1-4, wherein, On the same projection plane perpendicular to the distribution direction of the insulating element and the connecting portion, the orthographic projection of the insulating element extends beyond the periphery of the orthographic projection of the corresponding connecting portion.

25. A battery device, characterized by Includes the battery cell according to any one of claims 1-24.

26. An electrical device, comprising: It includes a battery cell according to any one of claims 1-24; or, it includes a battery device according to claim 25.

27. An energy storage device, comprising: It includes a battery cell according to any one of claims 1-24; or, it includes a battery device according to claim 25.

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