Battery monomer, battery device and electric device

Abstract

The utility model belongs to the technical field of battery production, and provides a battery monomer, a battery device and a power utilization device, the battery monomer comprises a shell, an anti-explosion valve, an electrode assembly and an insulating part; the shell is provided with an accommodating cavity; the anti-explosion valve is mounted on the shell; the electrode assembly is contained in the containing cavity, the electrode assembly is provided with a first end face and a tab arranged on the first end face in a protruding mode, the tab is arranged on the first side of the first end face, and the tab is provided with a tab edge far away from the first side; the insulating part is contained in the containing cavity and arranged between the first end face and the shell, the insulating part comprises an insulating pad and a boss, the insulating pad is provided with a first surface opposite to the first end face, the boss faces the first end face and is arranged on the first surface in a protruding mode, the boss is provided with a flow guide channel, and the flow guide channel is communicated with the containing cavity and the anti-explosion valve; in the first direction, the boss is configured to have a first spacing distance with the edge of the tab, so that the tab and the boss are configured in an avoiding manner. The utility model aims to reduce the risk of interference with the boss due to dislocation of the tabs.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a battery cell, battery device, and power-consuming device. Background Technology

[0002] In the field of battery technology, the design and optimization of the internal structure of battery cells has always been a key research focus. Inside a battery cell, an insulating component is typically installed between the electrode assembly and the top cover of the casing; this insulating component is referred to in the industry as the lower plastic layer. A flow-guiding structure, which is opposite to and connected to the explosion-proof valve, is usually formed on this insulating component. To save space inside the battery cell, this flow-guiding structure is typically made to protrude towards the electrode assembly, forming a boss.

[0003] For wound electrode assemblies or bare cells, the tabs are typically arranged at both ends along the length of the electrode assembly during the winding process. However, due to limitations in equipment precision, manufacturing processes, and other complex factors, misalignment of the tabs is highly likely to occur during actual production, and this misalignment problem becomes more pronounced with the number of tab layers.

[0004] In related technologies, the layout between the boss and the tab can easily cause misaligned tabs to interfere with the boss, leading to problems such as limited assembly of insulating components and damage to the tab due to compression, which affects the assembly of battery cells and the reliability of battery cells during use. Utility Model Content

[0005] The purpose of this application is to provide a battery cell, a battery device, and an electrical device, which aims to solve the technical problem that the tabs are prone to interference with the boss when they are misaligned.

[0006] In a first aspect, this application provides a battery cell, comprising:

[0007] The outer casing has a receiving cavity;

[0008] Explosion-proof valve, installed on the housing;

[0009] An electrode assembly is housed in a receiving cavity. The electrode assembly has a first end face and a tab protruding from the first end face. The first end face has a first side, the tab is disposed on the first side, and along a first direction, the tab has a tab edge away from the first side.

[0010] An insulating component is housed within a receiving cavity and disposed between a first end face and a housing. The insulating component includes an insulating pad and a boss. The insulating pad has a first surface opposite to the first end face. The boss protrudes from the first surface toward the first end face and has a flow channel provided on it. The flow channel connects the receiving cavity and the explosion-proof valve. Along a first direction, the boss is configured to have a first gap distance from the edge of the electrode tab so that the electrode tab and the boss are configured to avoid each other.

[0011] In this embodiment, by forming a first gap between the boss and the edge of the tab, even if the tab is misaligned or shifted in the direction perpendicular to the stacking direction during the winding and forming of the electrode assembly, the tab is not likely to come into contact with the boss or cause interference. This facilitates the assembly of the insulating pad and the electrode assembly, makes it less likely for the tab to be squeezed between the boss and the tab, and makes the tab less likely to break, which helps to improve the reliability of the battery cell during use.

[0012] In one embodiment, along a first direction, the boss is configured to have a second spacing distance from the first side, the second spacing distance being greater than the width of the tab along the first direction.

[0013] In this embodiment, by controlling the distance between the boss and the first side of the electrode assembly, the boss and the edge of the tab can also be spaced in the first direction, so that the tab is not easy to contact the boss and is not easy to interfere with the boss, which facilitates assembly and improves the reliability of the battery cell.

[0014] In one embodiment, along a first direction, the first end face also has a second side opposite to the first side, the electrode includes a first ear portion and a second ear portion, the first ear portion is disposed on the first side and has a first electrode edge away from the first side, the second ear portion is disposed on the second side and has a second electrode edge away from the second side, and the boss is configured to have a first interval distance from both the first electrode edge and the second electrode edge.

[0015] In this embodiment, the first electrode tab and the second electrode tab are misaligned or displaced in the direction perpendicular to the stacking direction. The first electrode tab and the second electrode tab are also less likely to come into contact with the boss and cause interference, thereby facilitating the assembly between the insulating pad and the electrode assembly.

[0016] In one embodiment, along a first direction, the boss is configured to have a second spacing distance from the first side, the second spacing distance being greater than the width of the first ear along the first direction; along the first direction, the boss is configured to have a second spacing distance from the second side, the second spacing distance being greater than the width of the second ear along the first direction.

[0017] In this embodiment, by controlling the distance between the boss and the first and second sides of the electrode assembly, the boss can be spaced apart from the electrode tab edges of the first ear and the second ear in the first direction, so that the first ear and the second ear are not easy to contact with the boss and are not easy to interfere with the boss, which facilitates assembly and improves the reliability of the battery cell.

[0018] In one embodiment, the first interval distance ranges from 0mm to 5mm.

[0019] In this embodiment, maintaining a 0mm-5mm interval between the boss and the edge of the tab is beneficial to improving the rationality of the spatial layout and maintaining good space utilization above the first end face.

[0020] In one embodiment, a projection surface is provided perpendicular to a first direction, and along a second direction, the projections of the boss and the tab on the projection surface are spaced apart, with the second direction perpendicular to the first direction.

[0021] In this embodiment, by controlling the boss and the tab to be spaced apart on the projection plane perpendicular to the first direction, the reliability of the spacing and avoidance between the tab and the boss is improved.

[0022] In one embodiment, a projection surface is provided perpendicular to the first direction, and the projections of the boss and the tab on the projection surface have overlapping portions, with a first interval greater than 0 mm.

[0023] In this embodiment, the first interval distance is greater than 0mm, so that the boss and the tab can not interfere with each other even when they intersect, thus improving reliability.

[0024] In one embodiment, in a plane parallel to the first end face, the boss has a first length along a second direction, the boss has a second length in the first direction, the first length is greater than the second length, and the second direction is perpendicular to the first direction.

[0025] In this embodiment, by making the extension length of the boss in the second direction greater than the extension length in the first direction, the risk of the boss contacting the tab in the first direction is reduced while ensuring the flow volume of the flow channel. This facilitates the avoidance between the boss and the tab and reduces the risk of interference.

[0026] In one embodiment, in a plane parallel to the first end face, along a second direction, the boss has a central region and an end region connected to the central region, the end region being disposed near the tab; in the first direction, the width of the end region is smaller than the width of the central region, and the second direction is perpendicular to the first direction.

[0027] In this embodiment, by shortening the width of the end region of the boss, the risk of interference between the tab and the boss is reduced, and the width of the area outside the end region is increased, so that there is more space inside the boss to open the flow channel, thereby ensuring the flow guiding efficiency of the boss.

[0028] In one embodiment, along the second direction, the width of the boss is gradually reduced from the central region toward a direction away from the central region.

[0029] In this embodiment, the tapered transition design makes the outer periphery of the boss smoother, more aesthetically pleasing, and easier to process and manufacture.

[0030] In one embodiment, the electrode includes a positive electrode and a negative electrode, both protruding from the first end face, and the insulating member also includes a partition member connected to the insulating pad, the partition member protruding from the first surface and disposed between the positive electrode and the negative electrode.

[0031] In this embodiment, the isolation component is used to isolate and insulate between the positive and negative tabs, making it less likely for a short circuit to occur between them.

[0032] In one embodiment, the boss is flush with the partition member at its protruding end.

[0033] In this embodiment, the partition component and the boss are arranged flush with each other at the protruding end, which helps to reduce the obstruction of gas, reduce the impact on the insulation of the partition, and facilitates processing and manufacturing.

[0034] In one embodiment, the flow channel includes a flow channel and a plurality of flow holes communicating with the flow channel. The insulating pad has a second surface opposite to the first surface, corresponding to a boss. The flow channel is formed on the second surface and extends into the boss, so that the boss forms a flow wall at the bottom of the flow channel. The plurality of flow holes are arranged at intervals on the flow wall.

[0035] In this embodiment, the guide groove and the guide hole are arranged in combination, so that the gas is directed to flow in the early stage, and then the gas is gathered and directed to flow out. This not only increases the gas emission path, but also helps to maintain the normal gas pressure environment inside the battery cell.

[0036] In one embodiment, the insulating pad also has a second surface opposite to the first surface, and the insulating member is also provided with a drainage channel that passes through the first surface and the second surface, so that the drainage channel connects the receiving cavity and the explosion-proof valve, and the drainage channel is arranged opposite to the explosion-proof valve and avoids the boss.

[0037] In this embodiment, the flow channel can control the gas emission and pressure stability of the main area inside the battery cell, while the drainage channel can supplement the gas collection range. Especially under extreme or special conditions, it plays a role in ensuring and improving the adaptability of the battery cell. The two complement each other and jointly optimize the performance and safety of the battery cell.

[0038] In one embodiment, a receiving groove is also provided on the second surface, the explosion-proof valve is housed in the receiving groove, a flow guide groove is provided at the bottom of the receiving groove, and a flow channel is provided on the bottom wall of the receiving groove in an area that avoids the flow guide groove, the flow channel passing through the bottom wall of the receiving groove and the first surface.

[0039] In this embodiment, by providing a receiving groove, the explosion-proof valve is contained, thereby reducing the risk of the explosion-proof valve protruding and interfering with external components.

[0040] In one embodiment, the battery cell further includes an electrode terminal connected to the housing, and the insulating member further includes a terminal insulating portion connected to an insulating pad, the terminal insulating portion being opposite to and connected to the electrode terminal.

[0041] In this embodiment, the terminal insulation part is connected between the electrode terminal and the outer shell, which serves as insulation and helps to reduce the risk of short circuit between the electrode terminal and the outer shell.

[0042] Secondly, this application provides a battery device, which includes a battery cell as described in any of the above.

[0043] Thirdly, this application provides an electrical device, including a battery cell as described above or a battery device as described above, wherein the battery device is used to store or provide electrical energy.

[0044] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0045] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application 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.

[0046] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0047] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0048] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0049] Figure 4 This is an exploded structural diagram showing the connection between the explosion-proof valve and the insulating component in a battery cell according to some embodiments of this application;

[0050] Figure 5 This is a schematic diagram of the structure of the insulating component in a battery cell provided in some embodiments of this application;

[0051] Figure 6 for Figure 5 Axonometric drawing;

[0052] Figure 7 for Figure 5 Looking up Figure 1 ;

[0053] Figure 8 for Figure 5 Looking up Figure 2 ;

[0054] Figure 9 This is a schematic diagram of the structure of the first end face of the electrode assembly in a battery cell provided in some embodiments of this application;

[0055] Figure 10 This application provides schematic diagrams of the structure of the battery cell in which the tabs and insulating components mate. Figure 1 ;

[0056] Figure 11 This application provides schematic diagrams of the structure of the battery cell in which the tabs and insulating components mate. Figure 2 ;

[0057] Figure 12 for Figure 10 A magnified view of a portion of position A in the middle.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1000, Vehicle; 1100, Battery assembly; 1110, Battery cell; 1111, Housing; 11111, Receiving cavity; 11112, First part; 11113, Second part; 1112, Electrode terminal; 1113, Explosion-proof valve; 1114, Insulating component; 11141, Insulating pad; 111411, First surface; 111412, Second surface; 11142, Boss; 111421, Middle area; 111422, End area; 11143, Flow channel; 11144, Flow groove; 11145, Flow hole; 11146, Flow wall; 11147, Drainage channel; 11148, Receiving groove; 11149, Terminal insulation part; 115. Electrode assembly; 11151. First end face; 11152. Electrode tab; 11153. Electrode tab edge; 11154. First side; 11155. First ear portion; 11156. Second ear portion; 11157. Positive electrode tab; 11158. Negative electrode tab; 11159. Second side; 1116. Partition component; 1117. Adapter piece; 1120. Housing; 1121. First structural part; 1122. Second structural part; 1123. Accommodation space; 1200. Controller; 1300. Motor; X, First direction; Y, Second direction; L1, First spacing distance; L2, Second spacing distance; L3, Overlap length; L4, First length; L5, Second length. Detailed Implementation

[0060] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0062] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0063] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0065] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and 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 the embodiments of this application.

[0067] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0068] With the continuous development of technology, batteries have been widely used in various fields. As the basic building block of a battery system, the performance of a single battery cell directly affects the performance of the entire battery system.

[0069] In the field of battery technology, the design and optimization of the internal structure of battery cells has always been a key research focus. In the structural design of battery cells, the rational layout and coordinated operation of electrode components, insulating parts, and explosion-proof valves are crucial.

[0070] Inside the battery cell, an insulating component, also known as the lower plastic, is typically installed between the electrode assembly and the top cover on the casing. This insulating component usually has a flow-guiding structure that is opposite to and connected to the explosion-proof valve. To save space inside the battery cell, this flow-guiding structure is usually made to protrude towards the electrode assembly to form a boss.

[0071] For wound electrode assemblies or bare cells, during the winding process, the tabs are typically stacked layer by layer from one side of the electrode assembly toward the middle region in the width direction, forming a certain stack width. The tabs need to be bent to form tab edges away from the side of the electrode assembly. However, due to limitations in equipment precision, manufacturing processes, and other complex factors, the tabs are prone to misalignment perpendicular to the stacking direction during actual production. If we define the stacking direction of the tabs as the first direction, then the direction of misalignment is the second direction, which is perpendicular to the first direction. The second direction can be understood as the length direction of the electrode assembly. In other words, during the winding process, the tabs are prone to misalignment in the second direction, and the more layers of tabs there are, the more significant this misalignment problem becomes.

[0072] During the assembly of a battery cell, the insulating component needs to be assembled to the end of the electrode assembly where the tab is located. The boss is typically positioned on one side of the tab; specifically, along the second direction, the boss is located on the side of the tab, and a gap is provided between the boss and the tab. When the tab is misaligned, along the second direction, the tab shifts relative to the boss towards the boss. The gap that originally existed between the tab and the boss is occupied by the misaligned movement of the tab, causing interference between the tab and the boss. This restricts the assembly of the insulating component, affecting the assembly of the battery cell. Alternatively, it can generate compressive force between the tab and the boss, causing damage to the tab and affecting the reliability of the battery cell during use.

[0073] Therefore, this application provides a battery cell that, by changing the layout of the boss, forms a certain gap between the edge of the boss and the edge of the tab on the electrode assembly. This makes it less likely for the tab to interfere with the boss when it moves or misaligns in the direction perpendicular to the stacking direction, facilitating the assembly of the insulating pad and the electrode assembly. The tab does not squeeze the boss, thus making the tab less prone to damage and improving the reliability of the battery cell during use.

[0074] Specifically, this application provides a battery cell 1110, which refers to the smallest unit constituting the battery device 1100. Each battery cell 1110 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 1110 can be cylindrical, flat, cuboid, or other shapes.

[0075] According to some embodiments of this application, refer to Figure 3-6 , Figure 10 and Figure 12As shown, this application embodiment provides a battery cell 1110, which includes a housing 1111, an explosion-proof valve 1113, an electrode assembly 1115, and an insulating member 1114. The housing 1111 has a receiving cavity 11111; the explosion-proof valve 1113 is mounted on the housing 1111; the electrode assembly 1115 is housed within the receiving cavity 11111, and the electrode assembly 1115 has a first end face 11151 and a tab 11152 protruding from the first end face 11151. The first end face 11151 has a first side 11154, and the tab 11152 is disposed on the first side 11154. Along the first direction X, the tab 11152 has a tab edge 11153 away from the first side 11154. The insulating member 1114 is housed in the accommodating cavity 11111 and disposed between the first end face 11151 and the outer shell 1111. The insulating member 1114 includes an insulating pad 11141 and a boss 11142. The insulating pad 11141 has a first surface 111411 opposite to the first end face 11151. The boss 11142 protrudes from the first surface 111411 toward the first end face 11151. A flow channel 11143 is provided on the boss 11142, and the flow channel 11143 connects the accommodating cavity 11111 and the explosion-proof valve 1113. Along the first direction X, the boss 11142 is configured to have a first gap distance L1 with the edge of the tab 11153, so that the tab 11152 and the boss 11142 are configured to avoid each other.

[0076] Among them, reference Figure 3 As shown, for the housing 1111, the housing 1111 serves to support the explosion-proof valve 1113, as referenced. Figure 3 and Figure 4As shown, the outer casing 1111 may include two parts, namely a first part 11112 and a second part 11113. The first part 11112 and the second part 11113 cover each other, and the first part 11112 and the second part 11113 together define a receiving cavity 11111 for accommodating the electrode assembly 1115. The second part 11113 may be a hollow structure with one end open, and the first part 11112 may be a plate-like structure. In this case, the first part 11112 can be understood as an end cap on the outer casing 1111. The first part 11112 covers the open side of the second part 11113 so that the first part 11112 and the second part 11113 together define the receiving cavity 11111. Alternatively, the first part 11112 and the second part 11113 may both be hollow structures with one side open, and the open side of the first part 11112 covers the open side of the second part 11113. The explosion-proof valve 1113 and the electrode terminal 1112 can be connected to either the first part 11112 or the second part 11113. The explosion-proof valve 1113 can be connected to the first part 11112 (or the second part 11113) by welding or by a detachable method. Of course, the outer shell 1111 formed by the first part 11112 and the second part 11113 can be of various shapes, such as a cylinder or a cuboid. In this application, a rectangular outer shell 1111 is used as an example for illustration.

[0077] Combination Figure 9 and Figure 10 As shown, the electrode assembly 1115 can be understood as a bare battery cell. The electrode assembly 1115 has a tab 11152 formed on it. The tab 11152 can be directly electrically connected to the electrode terminal 1112, or the tab 11152 can be electrically connected to the electrode terminal 1112 through the adapter piece 1117.

[0078] The electrode assembly 1115 is formed by winding. Specifically, the winding process is as follows: First, a positive electrode sheet, a negative electrode sheet, and a separator are prepared. The positive electrode sheet is usually made by coating a positive electrode active material onto a metal foil (such as aluminum foil), and the negative electrode sheet is made by coating a negative electrode active material onto a metal foil (such as copper foil). The separator is placed between the positive and negative electrode sheets, and the separator serves to isolate the positive and negative electrodes and prevent short circuits. Then, with one end aligned as a reference, the winding operation begins. During the winding process, the positive electrode sheet, separator, and negative electrode sheet are kept in close contact, and the winding is performed according to a predetermined number of turns, thereby forming a tightly wound electrode assembly 1115 structure. As the winding proceeds, the electrode assembly 1115 gradually takes shape, and its shape is usually cylindrical or flat, etc. In this embodiment, a flat square or square-shell battery is used as an example for explanation. The aligned end of the electrode assembly 1115 forms a first end face 11151.

[0079] The electrode assembly 1115 has tabs 11152. In the wound electrode assembly 1115, the tabs 11152 typically protrude from the first end face 11151 of the electrode assembly 1115. After winding, the tabs 11152 form a stacked structure with one side of the first end face 11151 of the electrode assembly 1115 stacked in a direction away from the first end face 11151. The tabs 11152 form an edge at the distal end on the side away from the first end face 11151. One side of the first end face 11151 is defined as the first side 11154, and the edge of the tab 11152 is defined as the tab edge 11153. Taking a square battery as an example, the side of the electrode assembly 1115 opposite to the first side 11154 is defined as the second side 11159. The direction in which the first side 11154 and the second side 11159 are opposite to or connected is the first direction X. The first direction X can also be understood as the width direction of the battery cell 1110 (or electrode assembly 1115). The tabs 11152 are stacked and bent from the first side 11154 toward the opposite side of the first side 11154 (i.e. along the first direction X). After the tabs 11152 are bent, an edge is formed at a position away from the first side 11154. This edge is the tab edge 11153. The tab edge 11153 can be the edge of the tab 11152 piece that is farthest from the first side 11154 after the stacked tabs 11152 are bent. The tab edge 11153 can be a straight line parallel to the first side 11154. Generally, the bending width of the tab 11152 on the first end face 11151 is less than half the width of the electrode assembly 1115 between the first side 11154 and the second side 11159. If the distance between the first side 11154 and the second side 11159 of the electrode assembly 1115 is defined as the width of the electrode assembly 1115, then the bending width of the tab 11152 should be less than half the width of the electrode assembly 1115. After winding, the tab 11152 protrudes from the first end face 11151 of the electrode assembly 1115, and the two sides of the tab 11152 form usable redundant space.

[0080] The explosion-proof valve 1113 is mainly used to promptly open and release pressure when the internal pressure of the battery cell 1110 abnormally increases, thereby reducing the risk of danger caused by excessive internal pressure in the battery cell 1110. During the charging and discharging process of the battery cell 1110, gas may be generated inside the battery cell 1110 due to electrochemical reactions and other reasons. If the gas cannot be released in time, the internal pressure will continue to rise. When the pressure reaches a certain dangerous threshold, the explosion-proof valve 1113 will activate to ensure that the internal pressure of the battery cell 1110 does not become excessive.

[0081] The explosion-proof valve 1113 is mounted on the housing 1111. When the housing 1111 has an end cap, the explosion-proof valve 1113 is usually mounted on the end cap. The explosion-proof valve 1113 is positioned opposite to the insulating member 1114. The area where the explosion-proof valve 1113 and the insulating member 1114 are opposite is the area where the boss 11142 is formed. The insulating member 1114 is disposed between the end cap and the first end face 11151 of the electrode assembly 1115.

[0082] Insulating components 1114 are generally made of materials with good insulation properties, such as rubber and plastic, and are formed by molding and other processes. The insulating component 1114 serves as an electrical insulator within the battery cell 1110. For example, the insulating component 1114 can isolate and insulate between the electrode terminal 1112 and the end cap. The insulating component 1114 can also insulate between the wound portion of the electrode assembly 1115 and the end cap (i.e., the first portion 11112 mentioned above). Furthermore, the insulating component 1114 can provide support between the electrode assembly 1115 and the end cap. For example, the insulating component 1114 can support the terminal post, which helps reduce the shaking of the terminal post. In addition, the insulating component 1114 can also guide and drain current between the electrode assembly 1115 and the explosion-proof valve 1113. During the charging and discharging process, the electrode assembly 1115 generates gas, which needs to pass through the insulating component 1114 to reach the position of the explosion-proof valve 1113, and is discharged to the outside of the battery cell by the explosion-proof valve 1113. Therefore, a flow channel 11143 is formed on the insulating component 1114.

[0083] Specifically, refer to Figure 3 , Figure 5 and Figure 6 As shown, the insulating member 1114 is located within the accommodating cavity 11111 and disposed between the first end face 11151 of the electrode assembly 1115 and the outer shell 1111. The insulating member 1114 may include a sheet-shaped insulating pad 11141 and a columnar protruding boss 11142. It is known that the surface of the insulating pad 11141 is disposed opposite to the first end face 11151, and this surface is defined as the first surface 111411 of the insulating pad 11141. The surface area of ​​the first surface 111411 of the insulating pad 11141 can be designed to match the surface area of ​​the first end face 11151, so that the insulating pad 11141 can block and block between the first end face 11151 and the end cap of the outer shell 1111, thereby playing an insulating role.

[0084] The boss 11142 is connected to the insulating pad 11141. The boss 11142 and the insulating pad 11141 can be detachably connected, or the boss 11142 and the insulating pad 11141 can be a single integral structure. The boss 11142 is connected to the first surface 111411 and extends from the first surface 111411 toward the electrode assembly 1115 and the first end face 11151. When the insulating member 1114 is assembled with the electrode assembly 1115, the boss 11142 is located in the redundant space on the side of the tab 11152, which can increase the extendable and protruding height of the boss 11142, thereby helping to increase the flow length or flow path of the flow channel 11143 inside the boss 11142.

[0085] Combination Figure 6 As shown, a flow channel 11143 is provided on the boss 11142. The flow channel 11143 is mainly used to collect and guide the gas generated by the charging and discharging of the electrode assembly 1115 to the position of the explosion-proof valve 1113. The flow channel 11143 can adopt a through-hole structure or a combination of hole structure and groove structure. Multiple through-hole structures can be provided, and multiple through-hole structures can be arranged alternately or connectedly. The flow channel 11143 can be arranged opposite to the explosion-proof valve 1113, or it can be understood that the outlet of the flow channel 11143 is arranged opposite to the explosion-proof valve 1113, thereby guiding the gas to the position of the explosion-proof valve 1113. The interior of the boss 11142 can be a solid structure or a hollow structure. Using a hollow structure helps to reduce the weight of the boss 11142.

[0086] After the insulating component 1114 is assembled with the electrode assembly 1115, the first end face 11151 faces the first surface 111411. Along the first direction X, the boss 11142 and the edge of the tab 11153 are separated by a first gap distance L1. Specifically, the first gap distance L1 can be understood as the vertical gap distance between the surface of the boss 11142 facing the first side 11154 and the edge of the tab 11153. The first gap distance L1 should be greater than or equal to 0 mm. After the first gap distance L1 is separated between the boss 11142 and the edge of the tab 11153, no matter how much the tab 11152 moves or widens in the direction perpendicular to the first direction X (i.e., the second direction Y), the tab 11152 will not interfere with the boss 11142, thus achieving the purpose of avoiding interference between the tab 11152 and the boss 11142.

[0087] In this embodiment, by forming a first gap distance L1 between the boss 11142 and the edge of the tab 11153, even if the tab 11152 is misaligned or shifted in the direction perpendicular to the stacking direction during the winding and forming of the electrode assembly 1115, the tab 11152 is not likely to come into contact with the boss 11142 or cause interference. This facilitates the assembly of the insulating pad 11141 and the electrode assembly 1115, makes it less likely for the tab 11152 to be squeezed between it and the boss 11142, and makes the tab 11152 less likely to break. This is beneficial to improving the reliability of the battery cell 1110 during use.

[0088] In some embodiments, refer to Figure 10 and Figure 12 As shown, along the first direction X, the boss 11142 is configured to have a second spacing distance L2 with the first side 11154, the second spacing distance L2 being greater than the width of the tab 11152 along the first direction X.

[0089] Specifically, in the actual manufacturing process, for the bent tab 11152, there are many uncertainties in the bending process of the tab 11152, which affects the specific position of the tab edge 11153. The position of the tab edge 11153 on each electrode assembly 1115 is prone to change. Therefore, in the design and manufacturing process, considering that the position of the first side 11154 of the first end face 11151 on the electrode assembly 1115 is relatively fixed, the distance from the boss 11142 to the first side 11154 can be controlled, so that the tab edge 11153 of the tab 11152 has a certain interval distance from the side of the boss 11142. This interval distance is defined as the second interval distance L2, and the second interval distance L2 is along the first direction X.

[0090] It is understood that the second spacing distance L2 should be at least greater than the width of the tab 11152 in the first direction X. The width of the tab 11152 in the first direction X is referred to as the tab 11152 width. This tab 11152 width should be understood as the width of the tab 11152 extending (or stacking and bending) away from the first side 11154 along the first direction X, so that the boss 11142 can have a first spacing distance L1 from the edge 11153 of the tab. It is understood that the second spacing distance L2 should be equal to the sum of the first spacing distance L1 and the width of the tab 11152.

[0091] In this embodiment, by controlling the distance between the boss 11142 and the first side 11154 of the electrode assembly 1115, the boss 11142 and the edge 11153 of the tab can also be spaced apart in the first direction X, so that the tab 11152 is not easy to come into contact with the boss 11142 and is not easy to interfere with the boss 11142, which facilitates assembly and improves the reliability of the battery cell 1110.

[0092] In some embodiments, refer to Figure 9 , Figure 10 and Figure 12 As shown, along the first direction X, the first end face 11151 also has a second side 11159 opposite to the first side 11154. The electrode tab 11152 includes a first ear portion 11155 and a second ear portion 11156. The first ear portion 11155 is disposed on the first side 11154 and has a first electrode tab edge away from the first side 11154. The second ear portion 11156 is disposed on the second side 11159 and has a second electrode tab edge away from the second side 11159. The boss 11142 is configured to have a first interval distance L1 with both the first electrode tab edge and the second electrode tab edge.

[0093] Specifically, the first side 11154 and the second side 11159 can be understood as two opposite sides of the first end face 11151, and the first side 11154 and the second side 11159 are arranged at intervals along the first direction X.

[0094] Generally, for a wound electrode tab 11152, a first ear portion 11155 and a second ear portion 11156 are formed on opposite sides of the electrode assembly 1115 (i.e., the first side 11154 and the second side 11159), respectively. It should be noted that the first ear portion 11155 and the second ear portion 11156 should be two parts of the electrode tab 11152 with the same polarity. For example, the electrode tab 11152 includes a positive electrode tab 1. A positive electrode 11157 and a negative electrode 11158 are arranged alternately on a first end face 11151 along a second direction Y. The positive electrode 11157 includes a first ear portion 11155 and a second ear portion 11156, and the negative electrode 11158 also includes a first ear portion 11155 and a second ear portion 11156. The first ear portion 11155 and the second ear portion 11156 are arranged alternately in the first direction X. In this embodiment, the electrode 11152 can refer to either the positive electrode 11157 or the negative electrode 11158.

[0095] For the first ear portion 11155, the first ear portion 11155 is disposed on the first side 11154 of the first end face 11151. Specifically, the electrode tabs in the first ear portion 11155 are stacked layer by layer from the first side 11154 toward a direction away from the first side 11154, so as to form a first electrode tab edge at a position away from the first side 11154. The second electrode tab edge is the aforementioned electrode tab edge 11153. (Combined) Figure 12 As shown, a first gap distance L1 is formed between the boss 11142 and the edge of the first pole lug. It can be seen that the boss 11142 and the edge of the first pole lug are separated by a first gap distance L1 along the first direction X.

[0096] For the second ear portion 11156, the second ear portion 11156 is disposed on the second side 11159 of the first end face 11151. Specifically, the electrode tab 11152 pieces in the second ear portion 11156 are stacked layer by layer from the second side 11159 toward a direction away from the second side 11159, so as to form a second electrode tab edge at a position away from the second side 11159. The second electrode tab edge is the aforementioned electrode tab edge 11153. (Combined) Figure 12 As shown, a first gap distance L1 is formed between the boss 11142 and the edge of the second pole ear. It can be seen that the boss 11142 and the edge of the second pole ear are separated by a first gap distance L1 along the first direction X.

[0097] As can be seen, after the insulating component 1114 is assembled with the electrode assembly 1115, the first end face 11151 faces the first surface 111411, and along the first direction X, the boss 11142 and the edge of the tab 11153 have a first gap distance L1. Specifically, the first gap distance L1 can be understood as the vertical gap distance between the surface of the boss 11142 facing the first side 11154 and the edge of the tab 11153. After the first gap distance L1 is separated between the boss 11142 and the edge of the tab 11153, no matter how much the tab 11152 moves or widens in the direction perpendicular to the first direction X (i.e., the second direction Y), the tab 11152 will not interfere with the boss 11142, thus achieving the purpose of avoiding interference between the tab 11152 and the boss 11142.

[0098] In this embodiment, for the tabs 11152 having a first tab 11152 portion and a second tab 11152 portion, both the first tab 11152 portion and the second tab 11152 portion are spaced apart by a first gap distance L1 from the boss 11142 in the first direction X. This causes the first tab 11152 portion and the second tab 11152 portion to be misaligned or shifted in the direction perpendicular to the stacking direction. The first tab 11152 portion and the second tab 11152 portion are also less likely to come into contact with the boss 11142 and cause interference. This facilitates the assembly between the insulating pad 11141 and the electrode assembly 1115, and makes it less likely for the first tab 11152 portion and the second tab 11152 portion to be squeezed between them and the boss 11142. This makes the first tab 11152 portion and the second tab 11152 portion less likely to be damaged, which is beneficial to improving the reliability of the battery cell 1110 during use.

[0099] In some embodiments, refer to Figure 9 , Figure 10 and Figure 12 As shown, along the first direction X, the boss 11142 is configured to have a second spacing distance L2 with the first side 11154, the second spacing distance L2 being greater than the width of the first ear 11155 along the first direction X; along the first direction X, the boss 11142 is configured to have a second spacing distance L2 with the second side 11159, the second spacing distance L2 being greater than the width of the second ear 11156 along the first direction X.

[0100] Similarly, considering the numerous uncertainties in the bending process of the first ear 11155 and the second ear 11156 during actual manufacturing, which affect the specific positions of the tab edges 11153 of the first ear 11155 and the second ear 11156, the positions of the tab edges 11153 on each electrode assembly 1115 are prone to change. Therefore, during the design and manufacturing process, the position of the tab edges 11153 on each electrode assembly 1115 is taken into account. The position of the first side 11154 of the first end face 11151 on component 1115 is relatively fixed. Therefore, the distance from the boss 11142 to the first side 11154 and the distance to the second side 11159 can be controlled, so that the pole ear edges 11153 of the first ear 11155 and the second ear 11156 (i.e., the first pole ear edge and the second pole ear edge, respectively) are at a certain distance from the side of the boss 11142. This distance is defined as the second distance L2, and the second distance L2 is along the first direction X.

[0101] It can be seen that the second interval distance L2 should be at least greater than the width of the first ear portion 11155 in the first direction X, and the second interval distance L2 should be at least greater than the width of the second ear portion 11156 in the first direction X. Generally, the width of the first pole ear 11152 is equal to the width of the second pole ear 11152. Therefore, the width of the first ear portion 11155 and the second ear portion 11156 in the first direction X is referred to as the pole ear 11152 width. The pole ear 11152 width of the first ear portion 11155 should be understood as the width of the first ear portion 11155 from the first side 11154 along the first... The width of the second ear 11156 extending (or stacking and bending) away from the first side 11154 in the X direction allows the boss 11142 to have a first spacing distance L1 from the tab edge 11153 of the first ear 11155; the width of the tab 11152 of the second ear 11156 should be understood as the width of the second ear 11156 extending (or stacking and bending) away from the second side 11159 in the X direction, allowing the boss 11142 to have a first spacing distance L1 from the tab edge 11153 of the second ear 11156. It is understood that the second spacing distance L2 should be equal to the sum of the first spacing distance L1 and the width of the tab 11152.

[0102] In this embodiment, by controlling the distance between the boss 11142 and the first side 11154 and the second side 11159 of the electrode assembly 1115, the boss 11142 can also form a gap with the tab edge 11153 of the first ear 11155 and the tab edge 11153 of the second ear 11156 in the first direction X, so that the first ear 11155 and the second ear 11156 are not easy to come into contact with the boss 11142 and are not easy to interfere with the boss 11142, which facilitates assembly and improves the reliability of the battery cell 1110.

[0103] In some embodiments, the first interval distance L1 ranges from 0 mm to 5 mm.

[0104] When the first interval distance L1 is equal to 0mm, it can be seen that the edge of the tab 11153 is in contact with the surface of the boss 11142, but no extrusion force is formed. In this case, the boss 11142 is not likely to damage the edge of the tab 11153, and it is not easy to damage the edge of the tab 11153. Therefore, the minimum first interval distance L1 can be 0mm.

[0105] However, considering the impact of manufacturing errors, the first interval distance L1 should be greater than 0 mm, which helps to improve the reliability of the spacing between the boss 11142 and the electrode edge 11153. However, considering the limited width range of the electrode assembly 1115 in the first direction X, and considering the width of the boss 11142 and the width of the electrode 11152, the first interval distance L1 should not be greater than 5 mm. The first interval distance L1 can take any value between 0 mm and 5 mm. For example, the first interval distance L1 can be 1 mm, 2 mm, 3 mm, 4 mm, etc.

[0106] In this embodiment, maintaining a 0mm-5mm interval between the boss 11142 and the edge of the tab 11153 is beneficial to improving the rationality of the spatial layout and maintaining good space utilization above the first end face 11151.

[0107] In some embodiments, a projection surface is provided perpendicular to the first direction X, and the projections of the boss 11142 and the tab 11152 on the projection surface are spaced apart along the second direction Y.

[0108] Specifically, for a prismatic battery, the first direction X can be understood as the width direction of the electrode assembly 1115, the length direction of the electrode assembly 1115 is defined as the second direction Y, and the height direction of the electrode assembly 1115 can be defined as the third direction, which is the outward extension direction of the boss 11142. It can be seen that both the first direction X and the second direction Y are perpendicular to the third direction.

[0109] The projection plane is perpendicular to the first direction X, so it can be seen that the projection plane is parallel to the first direction X and the third direction. Both the boss 11142 and the tab 11152 are projected onto the projection plane. The projections of the boss 11142 and the tab 11152 are spaced apart on the projection plane. It can be seen that along the second direction Y, the boss 11142 and the tab 11152 are spaced apart by a certain distance.

[0110] The above design ensures that even when the first interval distance L1 is 0mm, the tab 11152 and the boss 11142 can still form an interval in the second direction Y, and the edge 11153 of the tab and the boss 11142 will not come into contact, thereby improving the reliability of the tab 11152 and the boss 11142 being able to avoid each other.

[0111] In this embodiment, by controlling the boss 11142 and the tab 11152 to be spaced apart along the second direction Y on the projection plane perpendicular to the first direction X, it is beneficial to improve the reliability of the spacing and avoidance between the tab 11152 and the boss 11142.

[0112] In some embodiments, refer to Figure 10 and Figure 12As shown, there is a projection surface perpendicular to the first direction X. The projections of the boss 11142 and the tab 11152 on the projection surface have overlapping parts, and the first interval distance L1 is greater than 0 mm.

[0113] Similarly, the projection surface is used to reflect the relative positions of the boss 11142 and the tab 11152 in the second direction Y. In this example, the projections of the boss 11142 and the tab 11152 on the projection surface have overlapping parts. It can be seen that in the second direction Y, the tab 11152 extends to the end of the boss 11142. In this case, it is equivalent to the tab 11152 being misaligned and displaced. If the first interval distance L1 is negative in this case, interference between the boss 11142 and the tab 11152 will definitely occur. When the first interval distance L1 is 0 mm, the tab edge 11153 of the tab 11152 will contact the side of the boss 11142 at a certain distance. Therefore, in order to improve the reliability of the avoidance and spacing between the boss 11142 and the tab 11152, the first spacing distance L1 should be greater than 0mm, so that even when the boss 11142 and the tab 11152 intersect in the second direction Y, they can still be spaced apart in the first direction X, thereby reducing the probability of interference between the boss 11142 and the tab 11152.

[0114] In the second direction Y, the length of the overlapping portion of the boss 11142 and the tab 11152 on the projection plane is defined as 0mm-3mm, and the overlapping length is defined as the overlapping length L3. The overlapping length L3 is in the range of 0mm-3mm, and the overlapping length L3 can be any value in the range of 0mm-3mm.

[0115] In this embodiment, the first interval distance L1 is greater than 0 mm, so that the boss 11142 and the tab 11152 can still not interfere with each other even when they are intersecting, thus improving reliability.

[0116] In some embodiments, refer to Figure 7 As shown, in a plane parallel to the first end face 11151, the boss 11142 has a first length L4 along the second direction Y, and the boss 11142 has a second length L5 along the first direction X. The first length L4 is greater than the second length L5, and the second direction Y is perpendicular to the first direction X.

[0117] Specifically, taking a prismatic battery as an example, the first direction X can be understood as the width direction of the electrode assembly 1115, and the second direction Y can be understood as the length direction of the electrode assembly 1115, with the length direction perpendicular to the width direction.

[0118] If the first length L4 is greater than the second length L5, it can be understood that the first length L4 should be the length of the boss 11142 and the second length L5 should be the width of the boss 11142. The boss 11142 can be understood as a cubic boss 11142 structure that protrudes from the first end face 11151 and extends into a strip along the second direction Y. It can also be understood as the boss 11142 being arranged as a flow guiding structure that extends laterally and is far away from the longitudinal sides (i.e., the first side 11154).

[0119] The extension length of the boss 11142 in the second direction Y is greater than the extension length in the first direction X. When the flow channel 11143 adopts a multiple spaced hole structure, the multiple hole structures can be arranged at intervals in the second direction Y of the boss 11142, which is conducive to increasing the flow area and flow rate of the flow channel 11143, so as to improve the efficiency of flow guidance and drainage.

[0120] In this embodiment, by making the extension length of the boss 11142 in the second direction Y greater than the extension length in the first direction X, the risk of the boss 11142 contacting the tab 11152 in the first direction X is reduced while ensuring the flow volume of the flow channel 11143. This facilitates the avoidance between the boss 11142 and the tab 11152 and reduces the risk of interference.

[0121] In some embodiments, refer to Figure 8 and Figure 9 As shown, in a plane parallel to the first end face 11151, along the second direction Y, the boss 11142 has a middle region 111421 and an end region 111422 connected to the middle region 111421, and the end region 111422 is disposed near the tab 11152; in the first direction X, the width of the end region 111422 is smaller than the width of the middle region 111421, and the second direction Y is perpendicular to the first direction X.

[0122] Specifically, the boss 11142 extends a certain length along the second direction Y within the first end face 11151, such that the middle portion of the boss 11142 forms a middle region 111421, and the end near the tab 11152 forms an end region 111422. It should be noted that an end region 111422 is also formed at the other end of the boss 11142. When the tab 11152 includes a positive tab 11157 and a negative tab 11158, and the boss 11142 is located between the positive tab 11157 and the negative tab 11158, the design of the two end regions 111422 should be identical.

[0123] The boss 11142 has a width, which should be understood as the length of the boss 11142 extending along the first direction X. The width of the end region 111422 is made smaller than the width of the middle region 111421. In other words, the width of the end of the boss 11142 near the tab 11152 should be reduced compared to the width of the middle region 111421 of the boss 11142 away from the tab 11152. After the width of the end region 111422 of the boss 11142 is reduced, the distance between the end region 111422 and the tab 11152 in the first direction X will increase compared to the distance between the middle region 111421 and the tab 11152. As a result, when the tab 11152 is misaligned or displaced, the tab 11152 and the end region 111422 will also have a sufficiently large distance in the first direction X, so that the end region 111422 is less likely to interfere with the tab 11152.

[0124] In addition, after the width of the end region 111422 of the boss 11142 near the tab 11152 is shortened, the distance between the end region 111422 and the tab 11152 in the first direction X is increased, which makes it easier to increase the width of the middle region 111421, thereby increasing the number, area or volume of the flow channels 11143 that can be arranged inside the boss 11142, which is conducive to increasing the flow area and volume of the flow channel and improving the flow efficiency.

[0125] In this embodiment, by shortening the width of the end region 111422 of the boss 11142, the risk of interference between the tab 11152 and the boss 11142 is reduced, and the width of the area outside the end region 111422 is increased, so that there is more space inside the boss 11142 to open the flow channel 11143, thereby ensuring the flow guiding efficiency of the boss 11142.

[0126] In some embodiments, refer to Figure 8 and Figure 9 As shown, along the second direction Y, the width of the boss 11142 gradually decreases from the central region 111421 toward the direction away from the central region 111421.

[0127] It is known that the width of the end region 111422 is smaller than the width of the middle region 111421. In order to improve the smoothness of the outer periphery of the boss 11142, the width of the middle region 111421 and the width of the end region 111422 can gradually transition along the second direction Y. For example, the side of the boss 11142 forms an inclined straight line from the middle region 111421 to the end region 111422, such as the outer contour of the boss 11142 forming a rhombus shape in a plane parallel to the first end face 11151.

[0128] In this embodiment, the tapered transition design makes the outer periphery of the boss 11142 smoother, more aesthetically pleasing, and easier to process and manufacture.

[0129] In some embodiments, the outer contour shape of the boss 11142 may also be circular, elliptical or polygonal in a plane parallel to the first end face 11151.

[0130] In some embodiments, refer to Figure 6 and Figure 9-11 As shown, the tab 11152 includes a positive tab 11157 and a negative tab 11158 that are both protruding from the first end face 11151. The insulating member 1114 also includes a partition member 1116 connected to the insulating pad 11141. The partition member 1116 protrudes from the first surface 111411 and is disposed between the positive tab 11157 and the negative tab 11158.

[0131] Specifically, the partition component 1116 serves to separate and insulate between the positive electrode tab 11157 and the negative electrode tab 11158, preventing short circuits between them. During the manufacturing process of the battery cell 1110, when the electrode assembly 1115 is wound and assembled with the insulating pad 11141, both the positive electrode tab 11157 and the negative electrode tab 11158 protrude from the first end face 11151 of the electrode assembly 1115. Since the positive electrode tab 11157 and the negative electrode tab 11158 respectively transmit positive and negative charges during charging and discharging of the battery cell 1110, a significant potential difference exists between them. The partition component 1116 acts as a solid physical barrier between the positive electrode tab 11157 and the negative electrode tab 11158. Even if the positions of the positive tab 11157 and negative tab 11158 are slightly deviated due to various factors during the production process, or if the battery cell 1110 is subjected to external forces such as vibration and impact during use, the isolation component 1116 can effectively prevent the positive tab 11157 and negative tab 11158 from making accidental contact, thereby reducing the risk of short circuit between the positive and negative electrodes. Once a short circuit occurs, it will cause the internal current of the battery cell 1110 to increase instantaneously, leading to serious consequences such as overheating and combustion of the battery cell 1110. The presence of the isolation component 1116 greatly reduces this risk and improves the reliability of the battery cell 1110 during use.

[0132] For example, if the positive electrode tab 11157 and the negative electrode tab 11158 are spaced apart along the first direction X on the first end face 11151, then the partition member 1116 is located between the positive electrode tab 11157 and the negative electrode tab 11158. When the partition member 1116 is plate-shaped (or sheet-shaped), the plate surface direction of the partition member 1116 can be parallel to the first direction X. The partition member 1116 and the insulating pad 11141 can be connected in a washable manner, or the partition member 1116 and the insulating pad 11141 can be integrally molded to form an integral structure, and the insulating pad 11141 and the partition member 1116 can be made of the same material.

[0133] In this embodiment, the isolation component 1116 is used to isolate and insulate between the positive electrode 11157 and the negative electrode 11158, so that short circuits are less likely to occur between the positive electrode 11157 and the negative electrode 11158.

[0134] In some embodiments, refer to Figure 6 As shown, at the protruding end or outward protrusion of the boss 11142, the partition member 1116 is flush with the boss 11142.

[0135] Specifically, the partition component 1116 can be connected to or spaced apart from the boss 11142. When the partition component 1116 is connected to the boss 11142, the partition component 1116, the boss 11142 and the insulating pad 11141 can be integrally formed.

[0136] Both the partition component 1116 and the boss 11142 protrude and connect to the first surface 111411 of the insulating pad 11141. The partition component 1116 can be flush with the boss 11142. Specifically, the end of the partition component 1116 away from the first surface 111411 is flush with the end of the boss 11142 away from the first surface 111411 (i.e., the protruding end). This helps to reduce the problem of airflow obstruction caused by the partition component 1116 being too high, and also reduces the risk of reduced insulation performance caused by the partition component 1116 being too short. The flush arrangement of the partition component 1116 and the boss 11142 also facilitates manufacturing and helps to reduce processing costs.

[0137] In this embodiment, the partition component 1116 and the boss 11142 are arranged flush with each other at the protruding end, which helps to reduce the obstruction of gas, reduce the impact on the insulation of the partition, and facilitates processing and manufacturing.

[0138] In some embodiments, refer to Figure 4 , Figure 6 and Figure 12As shown, the flow channel 11143 includes a flow groove 11144 and a plurality of flow holes 11145 communicating with the flow groove 11144. The insulating pad 11141 has a second surface 111412 opposite to the first surface 111411. Corresponding to the boss 11142, the flow groove 11144 is formed on the second surface 111412 and extends into the boss 11142, so that the boss 11142 forms a flow wall 11146 at the bottom of the flow groove 11144. The plurality of flow holes 11145 are spaced apart on the flow wall 11146.

[0139] Specifically, the insulating pad 11141 is sheet-shaped, and it can be known that the insulating pad 11141 has a first surface 111411 and a second surface 111412 opposite to each other in the first direction X. The boss 11142 protrudes from the first surface 111411, and a guide groove 11144 is formed on the second surface 111412 at a position corresponding to the boss 11142. The guide groove 11144 is part of the guide channel 11143, and the guide groove 11144 is used to circulate the gas generated by the electrode assembly 1115. The depth direction of the guide groove 11144 is parallel to the protruding extension direction of the boss 11142. Since the guide groove 11144 corresponds to the boss 11142, it can be known that the opening of the guide groove 11144 should be opposite to the explosion-proof valve 1113. Since the guide groove 11144 and the boss 11142 correspond to each other in the first direction X, the bottom of the guide groove 11144 will extend into the interior of the boss 11142. A wall with a certain thickness will be formed between the bottom wall of the guide groove 11144 and the protruding end face of the boss 11142. This wall is defined as the guide wall 11146. Therefore, it can be understood that the guide wall 11146 can be a plate-like structure with a certain thickness.

[0140] The guide hole 11145 is also part of the guide channel 11143. Multiple guide holes 11145 are provided, each located on the guide wall 11146. The guide holes 11145 are through holes, allowing them to communicate with the guide groove 11144. When the first length of the boss 11142 is greater than the second length, the multiple guide holes 11145 can be arranged at intervals along the second direction Y on the guide wall 11146. The opening of the guide hole 11145 can be circular, elliptical, variable, or irregularly shaped. The central axis of the guide hole 11145 is parallel to the extension direction (or height direction) of the boss 11142.

[0141] During the charging and discharging process of the battery cell 1110, the electrode assembly 1115 generates gas. This gas first enters the guide channel 11144 through the guide holes 11145, which guide the gas. The gas converges within the guide channel 11144. When the gas pressure within the guide channel 11144 increases, it exerts a compressive force on the explosion-proof valve 1113. When the gas pressure reaches the opening pressure of the explosion-proof valve 1113, the valve opens, thus venting and depressurizing the gas. The guide channel 11144 also acts as a converging and buffering mechanism for the gas.

[0142] In this embodiment, the guide groove 11144 and the guide hole 11145 are arranged in a cooperative manner, so that by guiding the gas in a directional manner in the early stage, and then converging and directionally discharging the gas, the gas discharge path is increased, and it is also beneficial to maintain the normal gas pressure environment inside the battery cell 1110.

[0143] In some embodiments, refer to Figure 4-6 As shown, the insulating pad 11141 has a second surface 111412 opposite to the first surface 111411. The insulating member 1114 is also provided with a drainage channel 11147 that passes through the first surface 111411 and the second surface 111412, so that the drainage channel 11147 connects the accommodating cavity 11111 and the explosion-proof valve 1113. The drainage channel 11147 is arranged opposite to the explosion-proof valve 1113 and avoids the boss 11142.

[0144] Specifically, the insulating pad 11141 is sheet-shaped, and it is known that the insulating pad 11141 has a first surface 111411 and a second surface 111412 opposite to each other in the first direction X. The drainage channel 11147 is formed on the insulating pad 11141 and passes through the first surface 111411 and the second surface 111412. For example, the drainage channel 11147 includes a plurality of drainage hole structures, which are disposed between the first surface 111411 and the second surface 111412. The drainage channel 11147 is used to circulate the gas generated by the electrode assembly 1115.

[0145] Compared to the flow guiding channel 11143, the flow diversion channel 11147 avoids the boss 11142 and is located in the circumferential area or the areas on both sides of the boss 11142. The flow diversion channel 11147 avoids the boss 11142 and directly connects to the first surface 111411 and the second surface 111412. Furthermore, the flow diversion channel 11147 is opposite to the explosion-proof valve 1113, so that the gas in the accommodating cavity 11111 can be directly diverted to the explosion-proof valve 1113. The multiple diversion holes in the flow diversion channel 11147 can cover the area of ​​the explosion-proof valve 1113 other than the area opposite the boss 11142, thereby increasing the diversion area and improving the diversion effect.

[0146] During the charging and discharging process of the battery cell 1110, the rate and composition of gas generation in different areas may vary. The drainage channel 11147 can cover areas that are difficult for the guiding channel 11143 to reach, collecting and guiding the gas generated in these areas. For example, at the edges or corners of the electrode assembly 1115, some gas may be generated due to the non-uniformity of the electrochemical reaction. The guiding channel 11143 may not be able to collect it in a timely and effective manner. At this time, the drainage channel 11147 can play a role in quickly expelling these gases. Working in conjunction with the guiding channel 11143, it greatly improves the efficiency of gas emission inside the battery cell 1110, more thoroughly reduces the risk of gas accumulation in the accommodating cavity 11111, and further maintains the normal gas pressure environment inside the battery cell 1110.

[0147] In this embodiment, the flow channel 11143 can control the gas emission and pressure stability of the main area inside the battery cell 1110, while the flow channel 11147 can supplement the gas collection range. Especially under extreme or special conditions, it plays a role in ensuring and improving the adaptability of the battery cell 1110. The two complement each other and jointly optimize the performance and safety of the battery cell 1110.

[0148] In some embodiments, refer to Figure 4 As shown, a receiving groove 11148 is also provided on the second surface 111412. The explosion-proof valve 1113 is housed in the receiving groove 11148. A flow guide groove 11144 is provided at the bottom of the receiving groove 11148. A flow channel 11147 is provided on the bottom wall of the receiving groove 11148 in an area that avoids the flow guide groove 11144. The flow channel 11147 passes through the bottom wall of the receiving groove 11148 and the first surface 111411.

[0149] Specifically, the receiving groove 11148 is used to receive the explosion-proof valve 1113, and the circumferential contour dimension of the receiving groove 11148 can be consistent with and matched with the circumferential contour dimension of the explosion-proof valve 1113. The depth of the receiving groove 11148 can be connected to the depth of the explosion-proof valve 1113, so that the outer surface of the explosion-proof valve 1113 can be flush with the second surface 111412.

[0150] Since the explosion-proof valve 1113 is opposite to the boss 11142 and the guide groove 11144, it can be known that the guide groove 11144 is formed at the bottom of the receiving groove 11148. Since the drainage channel 11147 needs to connect the receiving cavity 11111 and the explosion-proof valve 1113, it can be known that the drainage channel 11147 is formed on the bottom wall of the receiving groove 11148, which avoids the guide groove 11144. The drainage channel 11147 includes multiple drainage hole structures, which are formed between the bottom wall of the receiving groove 11148 and the first surface 111411.

[0151] In this embodiment, by providing the receiving groove 11148, the explosion-proof valve 1113 is accommodated, thereby reducing the risk of the explosion-proof valve 1113 protruding outward and interfering with external components.

[0152] In some embodiments, refer to Figure 3 and Figure 4 As shown, the battery cell 1110 also includes an electrode terminal 1112 connected to the housing 1111, and the insulating member 1114 also includes a terminal insulating portion 11149 connected to the insulating pad 11141, the terminal insulating portion 11149 being opposite to and connected to the electrode terminal 1112.

[0153] Specifically, electrode terminal 1112, as a key component connecting battery cell 1110 to external circuitry, plays a crucial role in transmitting current. During battery discharge, the current generated by electrode assembly 1115 is conducted through electrode terminal 1112 to provide power to external electrical devices; conversely, during charging, current from the external power source flows into the battery through electrode terminal 1112 to charge electrode assembly 1115. The performance of electrode terminal 1112 directly affects the efficiency and stability of power transmission between battery cell 1110 and external circuitry.

[0154] The terminal insulation portion 11149 is connected to the insulating pad 11141, and its main function is to achieve electrical insulation between the electrode terminal 1112 and other components of the battery. Since the electrode terminal 1112 carries a high potential when transmitting current, direct contact with other components (such as the casing 1111) can easily cause a short circuit, leading to rapid energy loss, overheating, and even safety accidents. The terminal insulation portion 11149 is made of a material with excellent insulation properties, effectively limiting current leakage to other non-conductive components inside the battery, stabilizing the electric field distribution inside the battery, and maintaining the normal operating state of the battery.

[0155] The terminal insulation portion 11149 is opposite to and connected to the electrode terminal 1112, thereby forming a tight insulating protective structure. During the manufacturing process of the battery cell 1110, through precise assembly technology, the terminal insulation portion 11149 is accurately installed at the position corresponding to the electrode terminal 1112, ensuring a firm and reliable connection between the two. On the one hand, this connection allows the electrode terminal 1112 to reliably insulate and isolate itself while performing its current transmission function, reducing the risk of electrical connection with surrounding components and lowering the risk of short circuits. On the other hand, the connection between the terminal insulation portion 11149 and the insulating pad 11141 further strengthens the insulation system inside the entire battery cell 1110. The insulating pad 11141 itself serves as insulation and support between the electrode assembly 1115 and the outer casing 1111. The terminal insulating part 11149, as an extension of the insulating pad 11141, is connected to the electrode terminal 1112, thereby improving the overall insulation performance of the battery cell 1110. This enables the battery to operate safely and stably under various working conditions, extends the service life of the battery cell 1110, and improves the reliability and applicability of the battery cell 1110, allowing it to better meet the performance requirements of the battery cell 1110 in different application scenarios.

[0156] In this embodiment, the terminal insulation portion 11149 is connected between the electrode terminal 1112 and the housing 1111, which serves as insulation and helps to reduce the risk of short circuit between the electrode terminal 1112 and the housing 1111.

[0157] In one specific embodiment, refer to Figure 3-12As shown, the battery cell 1110 includes a housing 1111, an explosion-proof valve 1113, an electrode assembly 1115, and an insulating member 1114; wherein, the housing 1111 has a receiving cavity 11111; the explosion-proof valve 1113 is mounted on the housing 1111; the electrode assembly 1115 is received in the receiving cavity 11111, and the electrode assembly 1115 has a first end face 11151 and a tab 11152 protruding from the first end face 11151, the first end face 11151 has a first side 11154, the tab 11152 is disposed on the first side 11154, and along the first direction X, the tab 11152 has a tab edge 11153 away from the first side 11154; the insulating member 1114. The insulating member 1114 is housed within the receiving cavity 11111 and positioned between the first end face 11151 and the outer shell 1111. It includes an insulating pad 11141 and a boss 11142. The insulating pad 11141 has a first surface 111411 opposite to the first end face 11151. The boss 11142 protrudes from the first surface 111411 towards the first end face 11151. A flow channel 11143 is provided on the boss 11142, and the flow channel 11143 connects the receiving cavity 11111 and the explosion-proof valve 1113. Along the first direction X, the boss 11142 is configured to have a first gap distance L1 with the edge of the tab 11153, so that the tab 11152 and the boss 11142 are positioned close together. Two-phase avoidance configuration; along the first direction X, the first end face 11151 also has a second side 11159 opposite to the first side 11154, the electrode tab 11152 includes a first ear portion 11155 and a second ear portion 11156, the first ear portion 11155 is disposed on the first side 11154 and has a first electrode tab edge away from the first side 11154, the second ear portion 11156 is disposed on the second side 11159 and has a second electrode tab edge away from the second side 11159, the boss 11142 is configured to have a first interval distance L1 with both the first electrode tab edge and the second electrode tab edge; the range of the first interval distance L1 is 0mm-5mm; it has a projection surface perpendicular to the first direction X, along the second direction X... In the Y direction, the projections of the boss 11142 and the tab 11152 on the projection plane are spaced apart, or, perpendicular to the first direction X, the projection plane has overlapping portions on the projection plane, and the first interval distance L1 is greater than 0 mm; in a plane parallel to the first end face 11151, along the second direction Y, the boss 11142 has a middle region 111421 and an end region 111422 connected to the middle region 111421, and the end region 111422 is disposed toward the tab 11152; in the first direction X, the width of the end region 111422 is smaller than the width of the middle region 111421, and the second direction Y is perpendicular to the first direction X;The tab 11152 includes a positive tab 11157 and a negative tab 11158 both protruding from the first end face 11151. The insulating member 1114 also includes a partition member 1116 connected to the insulating pad 11141. The partition member 1116 protrudes from the first surface 111411 and is disposed between the positive tab 11157 and the negative tab 11158. The flow channel 11143 includes a flow groove 11144 and a plurality of flow channels. The groove 11144 is connected to the flow guide hole 11145. The insulating pad 11141 has a second surface 111412 opposite to the first surface 111411. Corresponding to the boss 11142, the flow guide groove 11144 is formed on the second surface 111412 and extends into the boss 11142, so that the boss 11142 forms a flow guide wall 11146 at the bottom of the flow guide groove 11144. The plurality of flow guide holes 11145 are arranged at intervals. On the flow guide wall 11146; the insulating pad 11141 also has a second surface 111412 opposite to the first surface 111411, and the insulating member 1114 is also provided with a flow channel 11147 that passes through the first surface 111411 and the second surface 111412, so that the flow channel 11147 connects the receiving cavity 11111 and the explosion-proof valve 1113. The flow channel 11147 is arranged opposite to the explosion-proof valve 1113 and avoids protrusions. The second surface 111412 is further provided with a receiving groove 11148, in which the explosion-proof valve 1113 is housed. A guide groove 11144 is formed at the bottom of the receiving groove 11148. A drainage channel 11147 is formed on the bottom wall of the receiving groove 11148 in an area that avoids the guide groove 11144. The drainage channel 11147 passes through the bottom wall of the receiving groove 11148 and the first surface 111411.

[0158] According to some embodiments of this application, refer to Figure 2 As shown, this application also provides a battery device 1100, which includes the battery cell 1110 in the above embodiments.

[0159] Specifically, refer to Figure 2 As shown in the illustration, this application provides a battery device 1100, which may include one or more battery cell assemblies for providing voltage and capacity. Each battery cell assembly may include multiple battery cells 1110, which are connected in series, parallel, or a combination of these cells via a busbar. The battery device 1100 may also be a battery pack, which generally includes a housing 1120 and one or more battery cells 1110 housed within the housing 1120.

[0160] The battery device 1100 disclosed in this application can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and systems that use the battery device 1100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0161] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0162] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0163] In some embodiments of this application, the battery device 1100 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.

[0164] Please refer to Figure 2 As shown, Figure 2 This is an exploded view of a battery device 1100 provided in some embodiments of this application. In one embodiment, the battery device 1100 includes a housing 1120 and a battery cell assembly. A receiving space 1123 is formed within the housing 1120, and the battery cell assembly is housed within the receiving space 1123. The battery cell assembly is typically formed by arranging multiple battery cells 1110. Alternatively, the battery cell assembly can also be a battery module, which is formed by arranging and fixing multiple battery cells 1110 to form an independent module. The housing 1120 provides the receiving space 1123 for the battery cells 1110, and the housing 1120 can adopt various structures.

[0165] For the housing 1120, the housing 1120 is used to accommodate the battery cell assembly. The housing 1120 may include a first structural portion 1121 and a second structural portion 1122. The first structural portion 1121 and the second structural portion 1122 cover each other, and the first structural portion 1121 and the second structural portion 1122 together define an accommodating space 1123 for accommodating the battery cell 1110. The first structural portion 1121 may be a plate-like structure, and the second structural portion 1122 may be a hollow structure with one end open. The first structural portion 1121 covers the open side of the second structural portion 1122, so as to jointly define the accommodating space 1123. Optionally, the first structural part 1121 may also be a hollow structure with an opening on one side. In this case, the second structural part 1122 may also be a hollow structure with an opening at one end. The opening side of the first structural part 1121 covers the opening side of the second structural part 1122, so as to jointly define the accommodating space 1123 together with the second structural part 1122. The box 1120 may be of various shapes, such as a cylinder, a cuboid, etc.

[0166] According to some embodiments of this application, this application also provides an energy storage device, which includes a plurality of battery cells 1110 or battery devices 1100, wherein the battery cells 1110 and battery devices 1100 are used to store or provide electrical energy.

[0167] Specifically, an energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple individual battery cells 1110 and battery devices 1100. The multiple individual battery cells 1110 and the multiple battery devices 1100 are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0168] 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, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0169] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0170] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0171] In some embodiments, the energy storage device may 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.

[0172] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via pipelines for regulating the temperature of the individual battery cells 1110.

[0173] As an example, 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 instance, it 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.

[0174] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it 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.

[0175] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0176] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0177] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0178] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0179] According to some embodiments of this application, refer to Figure 1 As shown, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0180] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 1110, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0181] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0182] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0183] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery unit 1100 in the energy storage devices via cables. The battery unit 1100 can provide its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000) to replenish their power.

[0184] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0185] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A single battery cell (1110), characterized in that, include: The outer casing (1111) has a receiving cavity (11111); An explosion-proof valve (1113) is installed on the housing (1111); An electrode assembly (1115) is housed within the receiving cavity (11111). The electrode assembly (1115) has a first end face (11151) and a tab (11152) protruding from the first end face (11151). The first end face (11151) has a first side (11154). The tab (11152) is disposed on the first side (11154) and along a first direction (X). The tab (11152) has a tab edge (11153) away from the first side (11154). An insulating member (1114) is housed within the receiving cavity (11111) and disposed between the first end face (11151) and the outer shell (1111). The insulating member (1114) includes an insulating pad (11141) and a boss (11142). The insulating pad (11141) has a first surface (111411) opposite to the first end face (11151), and the boss (11142) protrudes toward the first end face (11151). On the first surface (111411), a flow channel (11143) is provided on the boss (11142), and the flow channel (11143) connects the accommodating cavity (11111) and the explosion-proof valve (1113); along the first direction (X), the boss (11142) is configured to have a first gap distance (L1) with the edge of the electrode tab (11153) so that the electrode tab (11152) and the boss (11142) are configured to avoid each other.

2. The battery cell (1110) as described in claim 1, characterized in that, Along the first direction (X), the boss (11142) is configured to have a second spacing distance (L2) with the first side (11154), the second spacing distance (L2) being greater than the width of the tab (11152) along the first direction (X).

3. The battery cell (1110) as described in claim 1 or 2, characterized in that, Along the first direction (X), the first end face (11151) also has a second side (11159) opposite to the first side (11154). The electrode tab (11152) includes a first ear portion (11155) and a second ear portion (11156). The first ear portion (11155) is disposed on the first side (11154) and has a first electrode tab edge away from the first side (11154). The second ear portion (11156) is disposed on the second side (11159) and has a second electrode tab edge away from the second side (11159). The boss (11142) is configured to have the first interval distance (L1) with both the first electrode tab edge and the second electrode tab edge.

4. The battery cell (1110) as described in claim 3, characterized in that, Along the first direction (X), the boss (11142) is configured to have a second spacing distance (L2) with the first side (11154), the second spacing distance (L2) being greater than the width of the first ear (11155) along the first direction (X); along the first direction (X), the boss (11142) is configured to have a second spacing distance (L2) with the second side (11159), the second spacing distance (L2) being greater than the width of the second ear (11156) along the first direction (X).

5. The battery cell (1110) as described in claim 1 or 2, characterized in that, The first interval distance (L1) ranges from 0mm to 5mm.

6. The battery cell (1110) as described in claim 1 or 2, characterized in that, The projection surface is perpendicular to the first direction (X), and along the second direction (Y), the projections of the boss (11142) and the tab (11152) on the projection surface are spaced apart, and the second direction (Y) is perpendicular to the first direction (X).

7. The battery cell (1110) as described in claim 1 or 2, characterized in that, The projection surface is perpendicular to the first direction (X), and the projections of the boss (11142) and the tab (11152) on the projection surface have overlapping portions, and the first interval distance (L1) is greater than 0 mm.

8. The battery cell (1110) as described in claim 1 or 2, characterized in that, In a plane parallel to the first end face (11151), the boss (11142) has a first length along the second direction (Y) and a second length along the first direction (X), the first length being greater than the second length, and the second direction (Y) being perpendicular to the first direction (X).

9. The battery cell (1110) as described in claim 1 or 2, characterized in that, In a plane parallel to the first end face (11151), along the second direction (Y), the boss (11142) has a central region (111421) and an end region (111422) connected to the central region (111421), the end region (111422) being disposed close to the tab (11152); in the first direction (X), the width of the end region (111422) is smaller than the width of the central region (111421), and the second direction (Y) is perpendicular to the first direction (X).

10. The battery cell (1110) as described in claim 9, characterized in that, Along the second direction (Y), the width of the boss (11142) is gradually reduced from the central region (111421) toward the direction away from the central region (111421).

11. The battery cell (1110) as described in claim 1, characterized in that, The electrode tab (11152) includes a positive electrode tab (11157) and a negative electrode tab (11158) both protruding from the first end face (11151). The insulating member (1114) also includes a partition member (1116) connected to the insulating pad (11141). The partition member (1116) protrudes from the first surface (111411) and is disposed between the positive electrode tab (11157) and the negative electrode tab (11158).

12. The battery cell (1110) as described in claim 11, characterized in that, At the protruding end of the boss (11142), the boss (11142) is flush with the partition member (1116).

13. The battery cell (1110) as described in claim 1 or 2, characterized in that, The flow channel (11143) includes a flow groove (11144) and a plurality of flow holes (11145) communicating with the flow groove (11144). The insulating pad (11141) has a second surface (111412) opposite to the first surface (111411). Corresponding to the boss (11142), the flow groove (11144) is formed on the second surface (111412) and extends into the boss (11142) so that the boss (11142) forms a flow wall (11146) at the bottom of the flow groove (11144). The plurality of flow holes (11145) are spaced apart on the flow wall (11146).

14. The battery cell (1110) as described in claim 13, characterized in that, The insulating pad (11141) also has a second surface (111412) opposite to the first surface (111411). The insulating member (1114) is also provided with a drainage channel (11147) that passes through the first surface (111411) and the second surface (111412) so that the drainage channel (11147) connects the accommodating cavity (11111) and the explosion-proof valve (1113). The drainage channel (11147) is arranged opposite to the explosion-proof valve (1113) and avoids the boss (11142).

15. The battery cell (1110) as described in claim 14, characterized in that, The second surface (111412) is also provided with a receiving groove (11148), the explosion-proof valve (1113) is housed in the receiving groove (11148), the flow guide groove (11144) is provided at the bottom of the receiving groove (11148), and the flow channel (11147) is provided in the area of ​​the bottom wall of the receiving groove (11148) that avoids the flow guide groove (11144). The flow channel (11147) passes through the bottom wall of the receiving groove (11148) and the first surface (111411).

16. The battery cell (1110) as described in claim 1, characterized in that, The battery cell (1110) further includes an electrode terminal (1112) connected to the outer casing (1111), and the insulating member (1114) further includes a terminal insulating portion (11149) connected to the insulating pad (11141), the terminal insulating portion (11149) being opposite to and connected to the electrode terminal (1112).

17. A battery device (1100), characterized in that, The battery device (1100) includes a battery cell (1110) as described in any one of claims 1-16.

18. An electrical appliance, characterized in that, Includes a battery cell (1110) as described in any one of claims 1-16 or a battery device (1100) as described in claim 17, the battery device (1100) being used to store or provide electrical energy.

Images