Battery device, electric device, and energy storage device

Abstract

The application provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body and a battery monomer assembly. The battery monomer assembly is bonded to the bottom wall of the box body. The battery monomer assembly comprises a blocking piece and a plurality of battery monomers arranged along a first direction. The blocking piece is located between the main surfaces of two adjacent battery monomers. One end of the blocking piece towards the bottom wall has a first blocking part. The blocking piece further comprises a second blocking part connected to the inner side of the first blocking part away from the bottom wall. The outer sides of the two ends of the second blocking part along a second direction each have a containing area located between two adjacent battery monomers. The first blocking part is used to block the adhesive at the bottom wall from overflowing to the inner side of the first blocking part. The second blocking part is used to block the overflowing adhesive in the containing area. The blocking piece can block the adhesive from invading the main surface, thereby improving the stress concentration problem easily generated on the main surface.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, an electrical device, and an energy storage device. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable social development, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Stress concentration on the large surface area of ​​a battery cell can have a significant impact on battery reliability. Therefore, how to improve the stress concentration problem on the large surface area of ​​a battery cell and improve battery reliability has become a key research focus in this field. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one objective of this application is to provide a battery device, an electrical device, and an energy storage device to improve the problem of stress concentration easily occurring on large surfaces of battery cells.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a housing and a battery cell assembly; the battery cell assembly is adhered to the bottom wall of the housing, the battery cell assembly includes a blocking member and a plurality of battery cells arranged along a first direction, the battery cells having a main surface perpendicular to the first direction, and the main surface being the surface with the largest area among the battery cells; the blocking member is located between the main surfaces of two adjacent battery cells, and the blocking member has a first blocking portion at one end facing the bottom wall, the blocking member further includes a second blocking portion connected to the inner side of the first blocking portion away from the bottom wall, the outer sides of the two ends of the second blocking portion along a second direction each having a receiving area located between two adjacent battery cells, the first blocking portion being used to prevent adhesive at the bottom wall from overflowing into the inner side of the first blocking portion, and the second blocking portion being used to block the overflowed adhesive within the receiving area; wherein, the first direction is perpendicular to the second direction.

[0006] In the technical solution of this application embodiment, since the first blocking part and the second blocking part can block the adhesive and the receiving area can contain the overflowing adhesive, the amount of adhesive invading into the main surface can be reduced, thereby reducing the amount of adhesive invading into the area of ​​large expansion and deformation in the main surface, improving the stress concentration problem that is prone to occur on the main surface, and improving the reliability of the battery cell.

[0007] In some embodiments, the first blocking portion extends along a second direction, and a first gap is formed between the first end face of the first end of the first blocking portion along the second direction and the boundary of the first end of the main surface along the second direction, the first gap communicating with the receiving area outside the first end of the second blocking portion along the second direction.

[0008] In this embodiment, the first blocking portion extends along the second direction, which simplifies the installation process of the blocking member. Furthermore, it increases the blocking area and reduces the amount of adhesive spreading to the inside of the first blocking portion. By setting a first gap, the adhesive blocked by the first blocking portion can pass through the first gap into the receiving area, and the structure is simple and easy to implement.

[0009] In some embodiments, the end face of the first end of the first blocking portion along the second direction is the first end face, and the end face of the first end of the second blocking portion along the second direction is the first side surface; the first end face protrudes from the first side surface.

[0010] In this embodiment, the first end face protrudes from the first side surface, so that the portion of the first blocking part that protrudes from the second blocking part can serve as the bottom boundary of the receiving area. This reduces the backflow of adhesive into the receiving area, allowing the adhesive to overflow more evenly between the battery cells. Additionally, the area of ​​the blocking member can be increased accordingly, reducing the contact pressure between the battery cell and the blocking member, dispersing impact energy, improving the buffering effect, and making the connection between the battery cells more stable.

[0011] In some embodiments, the end face of the first end of the first blocking portion along the second direction is the first end face, and the end face of the first end of the second blocking portion along the second direction is the first side surface; the first side surface is flush with the first end face.

[0012] In this embodiment, the first end face and the first side surface are flush, which increases the size of the first gap and makes it easier for the adhesive to enter the receiving area. Simultaneously, it allows for a more regular and simpler shape of the blocking component, improving the assembly efficiency between the blocking component and the main surface and simplifying the installation process. For example, when bonding the blocking component using double-sided adhesive or other bonding methods, the number of positioning points between the blocking component and the main surface can be reduced, thereby simplifying the bonding process and improving installation efficiency.

[0013] In some embodiments, the blocking member further includes a third blocking portion connected to the side of the second blocking portion away from the bottom wall, the third blocking portion extending along the second direction.

[0014] It is understandable that the third blocking part can also serve to block adhesive, preventing adhesive at the top of the receiving area from overflowing over the top of the second blocking part. The third blocking part increases the contact area between the blocking part and the main surface, improving the cushioning effect. Simultaneously, the third blocking part is also located between two adjacent main surfaces. The third and first blocking parts can provide padding and support from the upper and lower sides in the third direction, making the vertical force on the two adjacent battery cells more even, improving the stability between the two adjacent batteries, and reducing shaking and tilting. Furthermore, the third blocking part extends along the second direction, resulting in a simple structure that simplifies the installation process of the blocking part.

[0015] In some embodiments, the end face of the first end of the third blocking portion along the second direction is the second end face, and the end face of the first end of the second blocking portion along the second direction is the first side surface; the second end face protrudes from the first side surface, and there is a second gap between the second end face and the boundary of the first end of the main surface along the second direction.

[0016] In this embodiment, the second end face protrudes from the first side surface, which increases the overall area of ​​the blocking member and thus enhances the buffering effect. The second gap allows the receiving area to communicate with the external environment, facilitating the smooth entry of adhesive into the receiving cavity. Furthermore, the portion of the third blocking part protruding from the second blocking part can serve as the top boundary of the receiving area, and in the event of excessive adhesive, it can reduce the openings for adhesive overflow from the receiving cavity, thereby mitigating the short-circuit contamination problem caused by adhesive overflow.

[0017] In some embodiments, the end face of the first end of the third blocking portion along the second direction is the second end face, and the end face of the first end of the second blocking portion along the second direction is the first side surface; the first side surface is flush with the second end face.

[0018] In this embodiment, the second end face is flush with the first side surface, which increases the size of the second gap, allowing for smoother airflow from the receiving area and easier entry of the adhesive into the receiving area. Simultaneously, it allows for a more regular and simpler shape of the blocking component, improving assembly efficiency between the blocking component and the main surface and simplifying the installation process. For example, when bonding the blocking component using double-sided adhesive or other bonding methods, the number of positioning points between the blocking component and the main surface can be reduced, thereby simplifying the bonding process and improving installation efficiency.

[0019] In some embodiments, the second blocking portion includes two blocking bodies extending along a third direction, and the first blocking portion is connected to a blocking body at each end along the second direction, and the blocking body has a receiving area on the outside away from the other blocking body; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0020] By incorporating two blocking elements, the material used in the blocking components can be reduced while achieving the desired blocking effect, thus lowering manufacturing costs. Simultaneously, the hollow area between the two blocking elements provides sufficient space for the expansion of the battery cell, improving its reliability.

[0021] In some embodiments, the first blocking body is a blocking body connected to the first end of the first blocking portion along the second direction. The first dimension D2 between the inner side of the first blocking body toward the other blocking body and the boundary of the first end of the main surface along the second direction satisfies: 0.25×T≤D2≤0.5×T; where T is the dimension of the battery cell along the first direction.

[0022] In this embodiment, by setting D2 to be greater than or equal to 0.25×T, sufficient size can be reserved for the receiving area, thereby preventing overflow of adhesive from easily spilling out of the receiving area and thus improving the short-circuit contamination problem caused by adhesive overflow. By setting D2 to be less than or equal to 0.5×T, the area occupied by the obstruction and the receiving area on the main surface of the battery cell can be minimized, thus improving the stress concentration problem on the main surface.

[0023] In some embodiments, the dimension W2 of the barrier along the second direction satisfies the following condition with respect to the first dimension D2: 0.1×D2≤W2≤0.5×D2.

[0024] In this embodiment, by setting W2 to be greater than or equal to 0.1 × D2, the width of the barrier can be increased, thereby enhancing its blocking effect on the adhesive and mitigating the problem of adhesive easily overflowing from the receiving area. Furthermore, by setting W2 to be less than or equal to 0.5 × D2, the area occupied by the barrier on the main surface of the battery cell can be minimized, mitigating the problem of stress concentration on the main surface. Sufficient space is provided for the receiving area to prevent overflowing adhesive from easily spilling out.

[0025] In some embodiments, the end face of the first end of the second blocking portion along the second direction is taken as the first side surface, and the end face of the second end of the second blocking portion along the second direction is taken as the second side surface. The second blocking portion covers the area between the first side surface and the second side surface.

[0026] In this embodiment, by setting the second blocking part as a whole structure, the contact pressure can be reduced, the impact energy can be dispersed, the buffering effect can be improved, and the stability between two adjacent battery cells can be improved.

[0027] In some embodiments, the blocking element is bonded between two adjacent battery cells.

[0028] In this embodiment, the assembly of the blocking component can be quickly achieved by bonding the blocking component, so that the blocking component can be tightly attached to the two main surfaces, improving the blocking effect on the adhesive, reducing the shaking and movement of the blocking component relative to the battery cell, and making the force more uniform.

[0029] In some embodiments, the two receiving areas are symmetrically arranged about the center plane of the battery cell; wherein the center plane is a plane passing through the geometric center of the battery cell and perpendicular to the second direction.

[0030] In this embodiment, receiving areas are provided on both sides of the blocking member, which can accommodate more adhesive and allow the adhesive to enter the receiving areas from both sides of the blocking member. The symmetrical arrangement of the receiving areas makes the distribution of adhesive more uniform and improves the bonding effect.

[0031] In some embodiments, the dimension W1 of the first blocking portion along the third direction and the dimension H of the main surface along the third direction satisfy: 1%×H≤W1≤10%×H, wherein the first direction, the second direction, and the third direction are perpendicular to each other; and / or, the dimension L1 of the first blocking portion along the second direction and the dimension W of the battery cell along the second direction satisfy: W-10mm≤L1≤W-1mm; and / or, the distance D1 between the outer side of the first blocking portion facing the bottom wall and the bottom surface of the battery cell facing the bottom wall satisfies: 0mm≤D1≤3mm.

[0032] By setting W1 to be greater than or equal to 1%×H, the height of the first blocking part can be increased, thereby enhancing its blocking effect on the adhesive and mitigating the problem of adhesive easily infiltrating the main surface. By setting W1 to be less than or equal to 10%×H, the area occupied by the first blocking part on the main surface of the battery cell can be minimized, improving the stress concentration problem on the main surface. By setting L1 to be greater than or equal to W-10mm, the width of the first blocking part can be increased, thereby enhancing its blocking effect on the adhesive and mitigating the problem of adhesive easily infiltrating the central area of ​​the main surface. By setting L1 to be less than or equal to W-1mm, the area occupied by the blocking part on the main surface of the battery cell can be minimized, reducing material usage and manufacturing costs. By setting D1 to be greater than or equal to 0mm, the first blocking part can be easily positioned and adhered. By setting D1 to be less than or equal to 3mm, the area of ​​the region above (inner side) the first blocking part can be increased, thereby further reducing the area of ​​adhesive on the main surface and mitigating stress concentration.

[0033] In some embodiments, the distance L2 between the side of the blocking member away from the bottom wall and the first blocking part satisfies the following relationship with the dimension H of the main surface along the third direction: 20%×H+6mm≤L2≤98%×H; wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0034] By setting L2 to be greater than or equal to 20% × H + 6 mm, the height of the second blocking part can be increased, thereby enhancing its blocking effect on the adhesive within the receiving area and making it less likely for the adhesive to cross the top of the second blocking part and invade the main surface. Simultaneously, by setting L2 to be less than or equal to 98% × H, the top of the blocking part can be located within the main surface and avoid the rounded corners at the top of the housing, facilitating the bonding and positioning of the blocking part.

[0035] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0036] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device in the above embodiments, and the energy storage device is used to store electrical energy.

[0037] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0038] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0039] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments; Figure 2 This is an exploded view of the battery device provided in some embodiments of this application; Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application; Figure 4 This is an exploded structural diagram of a battery cell and a blocking element provided in some embodiments of this application; Figure 5 This is a schematic diagram showing the positions of the battery cell and the blocking element provided in some embodiments of this application; Figure 6 This is an exploded side view of the battery cell and the blocking element provided in some embodiments of this application; Figure 7 for Figure 4 Schematic diagram of the middle blocking component; Figure 8 for Figure 5 Schematic diagram showing the position of the middle blocking component relative to the main surface; Figure 9 This is a schematic diagram of the structure of the blocking member provided in some other embodiments of this application; Figure 10 Schematic diagram of the structure of the blocking member provided in some embodiments of this application Figure 1 ; Figure 11 Schematic diagram of the structure of the blocking member provided in some embodiments of this application Figure 2 ; Figure 12 Schematic diagram of the structure of the blocking member provided in some embodiments of this application Figure 3 .

[0040] Explanation of reference numerals in the attached figures: 1000 vehicles; Battery unit 100, controller 200, motor 300; Battery cell assembly 10, battery cell 11, main surface 111, receiving area 112, end cap 12, housing 13, electrode assembly 14, flat area 141, bending area 142, center surface 15; The blocking component 400 includes a first blocking part 410, a first end face 411, a first gap 412, a second blocking part 420, a first side surface 421, a second side surface 422, a blocking body 423, a first blocking body 424, a third blocking part 430, a second end face 431, and a second gap 432. Box body 20, first part 21, second part 22, bottom wall 23. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 three cases: a exists alone, a and b exist simultaneously, and b exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] 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).

[0047] 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 are not intended to 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.

[0048] 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.

[0049] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0050] In the manufacturing process of batteries, especially power batteries or energy storage batteries, the assembly of battery cells into groups and their placement in the casing is one of the key steps. To improve the mechanical stability, thermal conductivity, and insulation safety of the battery cells in the module, an appropriate amount of structural adhesive is usually applied between the bottom of the battery cell and the tray or casing for fixation and sealing.

[0051] However, in actual production, due to inaccurate control of the amount of adhesive at the bottom or the strong fluidity of the adhesive, the adhesive "overflows" during the process of entering the box, and a large amount of it invades the large surface of the battery cell (the largest surface area in the battery cell) in an irregular manner. After the adhesive solidifies, it is easy to form hard lumps on the large surface. Especially during the expansion of the large surface of the battery cell, the hard lumps will cause stress concentration and affect the reliability of the battery.

[0052] To improve at least one of the above problems, this application provides a battery device, a power consumption device, and an energy storage device. The battery device includes: a housing and a battery cell assembly. The battery cell assembly is adhered to the bottom wall of the housing. The battery cell assembly includes a blocking member and a plurality of battery cells arranged along a first direction. Each battery cell has a main surface perpendicular to the first direction, and the main surface is the surface with the largest area among the battery cells. The blocking member is located between the main surfaces of two adjacent battery cells, and the end of the blocking member facing the bottom wall has a first blocking portion. The blocking member also includes a second blocking portion connected to the inner side of the first blocking portion away from the bottom wall. The outer sides of both ends of the second direction each have a receiving area located between two adjacent battery cells. The first blocking part is used to prevent the adhesive at the bottom wall from overflowing into the inner side of the first blocking part, and the second blocking part is used to block the overflowed adhesive within the receiving area. The first direction is perpendicular to the second direction. Since the first and second blocking parts can block the adhesive, the receiving area can accommodate the overflowed adhesive, thereby reducing the amount of adhesive intruding into the main surface. This reduces the amount of adhesive intruding into areas of the main surface with large expansion and deformation, improves the stress concentration problem that is prone to occur on the main surface, and improves the reliability of the battery cells.

[0053] The technical solutions described in the embodiments of this application are applicable to battery devices in which battery cells are fixed and sealed by adhesives, electrical devices using battery devices, and energy storage devices.

[0054] The energy storage device utilizing battery devices as a power source in this application embodiment includes one or more battery clusters to enhance the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices, which 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.

[0055] 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 devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices. As an example, the energy storage device is an energy storage container or an energy storage cabinet.

[0056] In this application embodiment, the power-consuming device using a battery as a power source can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0057] It should be understood that the technical solutions described in the embodiments of this application are not limited to the energy storage devices and electrical devices described above, but can also be applied to various battery assembly processes that require precise control of the adhesive coating range. Its application scope includes, but is not limited to, the packaging processes of various batteries such as lithium-ion batteries and polymer batteries. It can not only improve the low reliability problem caused by stress concentration in individual battery cells, but also effectively improve quality problems such as short circuits and contamination caused by adhesive overflow. However, for the sake of brevity, the following embodiments all use a vehicle as an example of the electrical device.

[0058] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 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 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0059] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0060] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery provided in some embodiments of this application.

[0061] The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0062] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0063] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0064] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 20 and one or more individual battery cells 10, with the individual battery cells 10 housed within the housing 20. The housing 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple cuboids, cylinders, or spheres. The material of the housing 20 can be an alloy such as aluminum alloy or iron alloy, a polymer such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0065] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0066] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0067] As an example, the housing 20 may include a first part 21 and a second part 22. The first part 21 and the second part 22 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11. The first part 21 may be a top cover or a bottom plate.

[0068] As an example, the housing 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 20 forms an enclosed space to house the battery cell assembly 10.

[0069] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0070] The battery cell 11 provided in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0071] The battery cell 11 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0072] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. The battery cell 11 refers to the smallest unit that makes up the battery. For example... Figure 3 The battery cell 11 includes an end cap 12, a housing 13, an electrode assembly 14, and other functional components.

[0073] End cap 12 refers to a component that covers the opening of housing 13 to isolate the internal environment of battery cell 11 from the external environment. The shape of end cap 12 can be adapted to the shape of housing 13 to fit it. In some embodiments, end cap 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 12 is less prone to deformation under pressure and impact, enabling battery cell 11 to have higher structural strength and improved safety performance. Functional components such as electrode terminals can be provided on end cap 12. Electrode terminals can be used for electrical connection with electrode assembly 14 for outputting or inputting electrical energy to battery cell 11. In some embodiments, end cap 12 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 11 reaches a threshold. The material of end cap 12 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 12. The insulating element can be used to isolate the electrical connection components within the housing 13 from the end cap 12 to reduce the risk of short circuits. Exemplarily, the insulating element may be made of plastic, rubber, etc.

[0074] The housing 13 is a component used to cooperate with the end cap 12 to form the internal environment of the battery cell 11. This internal environment can accommodate the electrode assembly 14, electrolyte, and other components. The housing 13 and the end cap 12 can be independent components. An opening can be provided on the housing 13, and the end cap 12 closes the opening to form the internal environment of the battery cell 11. Alternatively, the end cap 12 and the housing 13 can be integrated. Specifically, the end cap 12 and the housing 13 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 13, the end cap 12 closes the housing 13. The housing 13 can be of various shapes and sizes, such as a cuboid. Specifically, the shape of the housing 13 can be determined according to the specific shape and size of the electrode assembly 14. The housing 13 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0075] Electrode assembly 14 is the component in the battery cell 11 where the electrochemical reaction occurs. The housing 13 may contain one or more electrode assemblies 14. Electrode assembly 14 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly. Electrode assembly 14 may include a flat region 141 and bent regions 142 located on both sides of the flat region 141. The flat region 141 may be generally parallel to the plane direction and may be formed by the planar portion of the electrode sheet. The bent regions 142 may be formed by the bent portion of the electrode sheet, for example, they may be semi-cylindrical.

[0076] Figure 4 This is an exploded structural diagram of a battery cell and a blocking element provided in some embodiments of this application; Figure 5 This is a schematic diagram showing the positions of the battery cell and the blocking element provided in some embodiments of this application; Figure 6 This is an exploded side view of the battery cell and the blocking element provided in some embodiments of this application; Figure 7 for Figure 4 Schematic diagram of the middle blocking component; Figure 8 for Figure 5 A schematic diagram showing the position of the middle blocking component relative to the main surface.

[0077] Please refer to Figures 1 to 8This application provides a battery device 100, including: a housing 20 and a battery cell assembly 10; the battery cell assembly 10 is bonded to the bottom wall 23 of the housing 20, and the battery cell assembly 10 includes a blocking member 400 and a plurality of battery cells 11 arranged along a first direction X. Each battery cell 11 has a main surface 111 perpendicular to the first direction X, and the main surface 111 is the surface with the largest area among the battery cells 11; the blocking member 400 is located between the main surfaces 111 of two adjacent battery cells 11, and the blocking member 400 faces the bottom. One end of the wall 23 has a first blocking portion 410, and the blocking member 400 also includes a second blocking portion 420 connected to the inner side of the first blocking portion 410 away from the bottom wall. The outer sides of both ends of the second blocking portion along the second direction Y each have a receiving area 112 located between two adjacent battery cells 11. The first blocking portion 410 is used to prevent the adhesive at the bottom wall 23 from overflowing into the inner side of the first blocking portion 410, and the second blocking portion 420 is used to block the overflowed adhesive within the receiving area 112; wherein, the first direction X is perpendicular to the second direction Y.

[0078] Wherein, the first direction X can be the thickness direction of the battery cell 11, the second direction Y can be the width direction of the battery cell, and the third direction Z can be the height direction of the battery cell 11. The first direction X, the second direction Y, and the third direction Z can be perpendicular to each other.

[0079] The battery cell assembly 10 may include a plurality of battery cells 11 arranged along a first direction X. It is understood that each battery cell 11 may be a square battery cell, which may have approximately six surfaces. The surface with the largest area is the main surface 111 (large surface) of the battery cell, meaning that the area of ​​the main surface 111 is larger than the area of ​​the remaining surfaces of the adjacent battery cells. Furthermore, the main surface 111 is perpendicular to the first direction. The battery cells 11 in the battery cell assembly 10 may be arranged with their large surfaces facing each other.

[0080] Of course, in other embodiments, the battery cell 11 may have more surfaces and shapes, such as a polygonal prism, in which case the main surface 111 is the surface with the largest area.

[0081] The housing 20 may have a bottom wall 23, which can be a bottom tray or a bottom component of a box-shaped structure. The battery cell assembly 10 can be bonded and fixed to the bottom wall 23. For example, the bottom wall 23 may be coated with adhesive, and the bottom surface of the battery cell 11 facing the bottom wall can contact and bond with the adhesive, thereby achieving a fixed connection between the battery cell 11 and the bottom wall 23. The adhesive can be a commonly used structural adhesive, etc., and bonding can be achieved through curing.

[0082] Additionally, it can be understood that the battery cell assembly 10 can be a battery module that is fixedly connected by end plates or cable ties, etc. The battery module can be installed as a whole in the box, or the battery cells 11 can be directly installed in the box, and a row of battery cells 11 along the first direction can form a battery cell assembly 10. The specific configuration can be set according to the actual situation.

[0083] In this embodiment, the battery cell assembly 10 is further provided with a blocking member 400, which can be disposed between the main surfaces 111 of two adjacent battery cells 11. It is understood that the battery cell assembly 10 may have one or more blocking members 400. For example, a blocking member 400 may be disposed between some of the adjacent battery cells 11, or a blocking member 400 may be disposed between any two adjacent battery cells.

[0084] The blocking component 400 can be attached between the two opposing main surfaces 111 of two adjacent battery cells by means of abutment or adhesion. The blocking component 400 can be a single integral part or a structure composed of multiple parts. The blocking component 400 can be made of common cushioning gasket materials, such as silicone, rubber, MPP (Microcellular Polypropylene foam), or one or more of these materials. In addition, the blocking component 400 can be used to block adhesives, that is, the adhesive cannot easily spread and overflow through the blocking component. It can be understood that the blocking component 400 can also serve as a buffer component between battery cells 11. It can have a certain degree of elasticity, can be compressed under external force, thereby improving the buffering capacity, and can also provide space for the expansion of battery cells.

[0085] The blocking member 400 may include a first blocking portion 410 and a second blocking portion 420. The first blocking portion 410 may be located on the main surface 111 near the bottom wall 23. The side of the first blocking portion 410 facing the bottom wall 23 is defined as the outer side of the first blocking portion 410. Figure 8 The lower side of the first blocking part), with the side of the first blocking part 410 away from the bottom wall 23 as the inner side of the first blocking part ( Figure 8 (The upper side of the first blocking part). The first blocking part 410 can be a strip-shaped, block-shaped, or other structure. For example... Figure 8 The first blocking portion 410 can be used to prevent the adhesive on the bottom wall from spreading upwards and overflowing. Unless otherwise stated, each part of the blocking portion, including the first blocking portion and the second blocking portion, is connected between the main surfaces of two adjacent battery cells.

[0086] The second blocking portion 420 can be connected to the inner side of the first blocking portion 410. For example, the two can be directly or indirectly connected by common connection methods, or they can be integrally formed. Additionally, the outer sides of both ends of the second blocking portion 420 along the second direction can have receiving areas 112. It is understood that the blocking member 400 does not completely cover the entire main surface 111, and since the blocking member has a certain size in the first direction X, the outer sides of both ends of the second blocking portion 420 along the second direction each have partial cavities, and each side can form a receiving area.

[0087] In this embodiment, a receiving area 112 can be provided on the outer sides of both ends of the second blocking part 420 along the second direction, that is, please refer to Figure 8 Between adjacent pairs of battery cells 11, there can be two receiving areas 112, which can be located at the left and right ends of the second blocking part 420, respectively. In this embodiment, receiving areas are provided on both sides of the blocking member, which can accommodate more adhesive.

[0088] Additionally, it can be understood that the second blocking part 420 can form the boundary of the receiving area, which can be used to contain the adhesive, and the second blocking part can have the function of blocking the adhesive, thereby blocking the adhesive inside the receiving area 112, making it difficult for the adhesive in the receiving area to pass through the second blocking part 420.

[0089] In this embodiment, the structure of the second blocking portion 420 can be varied. For example, the second blocking portion 420 can be a sheet-like structure covering most of the area of ​​the main surface 111, or the second blocking portion 420 can include two strip-like structures located on both sides of the main surface along the second direction.

[0090] The housing 13 of the battery cell 11 may contain one or more electrode assemblies 14, which can be formed by winding or stacking electrode sheets. It is understood that during charging and discharging, the electrode assembly 14 is prone to expansion, causing the housing 13 to expand and deform. This deformation is mostly concentrated in the flat area 141 of the electrode assembly 14, meaning the main surface 111 of the battery cell is more likely to bulge outwards. It is understood that due to the constraints of the housing, the deformation in the central region of the main surface 111 is greater than that in the edge region. Furthermore, the edges of the main surface 111 along the second direction typically correspond to the bending areas 142 of the stacked or wound electrode assemblies 14. Since the bending areas are mostly semi-circular or arc-shaped, the locations corresponding to these bending areas (the edges of the main surface 111 along the second direction) can have a certain deformation space, making them less prone to stress concentration compared to the areas corresponding to the flat areas of the main surface. For ease of explanation, the areas of the main surface prone to stress concentration corresponding to the flat areas are defined below as stress-sensitive areas.

[0091] In this embodiment, by reasonably setting the positions of the first blocking part and the second blocking part, the stress-sensitive area can be located within the area enclosed by the outer boundary of the blocking member.

[0092] At this time, the first blocking part 410 can be located at the lower edge of the stress-sensitive area (on the side near the bottom wall), while the second blocking part 420 can cover the sheet-like structure of the stress-sensitive area, or it can include strip-like structures located on the left and right sides of the area (such as...). Figure 8 (As shown). The receiving area 112 may be located outside the first end of the stress-sensitive region along the second direction.

[0093] It is understandable that during bonding, adhesive can be applied to the bottom wall 23. Before curing, the adhesive has a certain degree of fluidity. If the fluidity is strong or the amount of adhesive is large, the adhesive will overflow from the bottom wall along the gaps between the battery cells 11. At this time, the first blocking part 410 can be used to block the adhesive, making it difficult for it to overflow into the inner side of the first blocking part 410 in a direction away from the bottom wall 23. That is, the adhesive is not easy to overflow through the first blocking part into the stress-sensitive area. And due to the blocking of the second blocking part, the adhesive is also not easy to overflow from the receiving area 112 into the stress-sensitive area through the second blocking part. This makes it difficult for the adhesive to exist in the stress-sensitive area, thereby reducing the hard lumps formed by the curing of the adhesive in the stress-sensitive area, improving the problem of stress concentration on the main surface, and improving the reliability of the battery cells. Furthermore, by containing the adhesive in the receiving area, the adhesive can be contained in the receiving area in a regular manner, instead of spreading randomly on the main surface. This can reduce the coverage area of ​​the adhesive on the main surface, further reducing the stress concentration problem.

[0094] In addition, the solution provided in this embodiment can effectively improve quality problems such as short circuits and contamination caused by adhesive overflow through the physical limiting effect of the blocking component. It can be applied to adhesives of various viscosities and is stable and reliable.

[0095] According to some embodiments of this application, such as Figure 5 and Figure 8 As shown, the first blocking portion 410 extends along the second direction Y, and there is a first gap 412 between the first end face 411 of the first end of the first blocking portion 410 along the second direction Y and the boundary of the first end of the main surface 111 along the second direction Y. The first gap 412 communicates with the receiving area 112 outside the first end of the second blocking portion along the second direction.

[0096] It is understandable that the first end of the second direction Y can be Figure 8The first end of each component (e.g., the first stop, the second stop, or the main surface) along the second direction refers to its left end along the second direction, or vice versa. It can be understood that the first end along the second direction and the second end along the second direction are arranged opposite each other. When the first end of each component along the second direction is its left end along the second direction, the second end of each component along the second direction is its right end along the second direction, and vice versa.

[0097] In this embodiment, the first blocking portion 410 can extend along the second direction Y in a strip-like structure. For ease of explanation, the first end in the second direction will be referred to below. Figure 8 The right end of the first blocking part 410 along the second direction Y can be the right end face of the first blocking part 410, that is, the first end face 411.

[0098] The boundary of the first end of the main surface 111 along the second direction Y is Figure 8 A first gap 412 may exist between the first end face 411 and the right boundary of the main surface 111. Thus, the first end face 411 of the first blocking portion 410 is located within the main surface 111, and is neither flush with nor protruding from the boundary of the main surface. This first gap 412 can connect to the receiving area 112 on the right side of the second blocking portion.

[0099] In this embodiment, the first blocking portion extends along the second direction, which simplifies the installation process of the blocking member. Furthermore, it increases the blocking area and reduces the amount of adhesive spreading to the inside of the first blocking portion. By setting a first gap, the adhesive blocked by the first blocking portion can pass through the first gap into the receiving area, and the structure is simple and easy to implement.

[0100] In other embodiments, the first end face 411 of the first blocking part 410 may also be flush with the boundary of the main surface, and the area corresponding to the receiving area of ​​the first blocking part may be connected to the area outside the first blocking part 410 through holes or other means, so that the adhesive can smoothly enter the receiving area.

[0101] In addition, in some embodiments, there may be a first gap between the end face of the second end of the first blocking portion 410 along the second direction Y and the boundary of the second end of the main surface 111 along the second direction Y, and the first gap may communicate with the receiving area outside the second end of the second blocking portion along the second direction.

[0102] According to some embodiments of this application, please refer to Figures 5 to 8The first end face of the first blocking part 410 along the second direction Y is the first end face 411, and the end face of the first end of the second blocking part 420 along the second direction is the first side surface 421; the first end face 411 protrudes from the first side surface 421.

[0103] In this embodiment, the end face of the first end of the second blocking portion 420 along the second direction refers to the end face of the first end of the second blocking portion 420 as a whole along the second direction Y. Figure 8 The rightmost end face (the end face in the middle), which is the first side surface 421.

[0104] Understandable, such as Figure 8 In the case where the second blocking part 420 comprises multiple parts, the rightmost end face of all the right end faces of these parts can be the first side surface 421.

[0105] The first end face 411 and the first side face 421 can be either planes or curved surfaces, for example... Figure 8 In this embodiment, both can be planes perpendicular to the second direction. In other embodiments, one of the first end face 411 and the first side surface 421 can be inclined relative to the second direction.

[0106] The first end face 411 may protrude from the first side surface 421, that is, the first end of the first blocking portion 410 along the second direction Y may extend along the second direction to the first side surface 421 protruding from the second blocking portion 420.

[0107] In this embodiment, the first end face protrudes from the first side surface, so that the portion of the first blocking part that protrudes from the second blocking part can serve as the bottom boundary of the receiving area. This reduces the backflow of adhesive into the receiving area, allowing the adhesive to overflow more evenly between the battery cells. Additionally, the area of ​​the blocking member can be increased accordingly, reducing the contact pressure between the battery cell and the blocking member, dispersing impact energy, improving the buffering effect, and making the connection between the battery cells more stable.

[0108] Figure 9 This is a schematic diagram of the structure of the blocking member provided in some other embodiments of this application; please refer to... Figure 9 According to some embodiments of this application, the end face of the first end of the first blocking part 410 along the second direction Y is the first end face 411, and the end face of the first end of the second blocking part 420 along the second direction Y is the first side surface 421; the first side surface 421 is flush with the first end face 411.

[0109] This embodiment and Figure 8 The difference in the illustrated embodiment is that the first side surface 421 is flush with the first end surface 411; that is, the first blocking portion 410 does not protrude from the second blocking portion 420 along the second direction, but rather the two are flush. For example, Figure 9 The first end face 411 and the first side face 421 can be located in the same plane, which can be perpendicular to the second direction.

[0110] In other embodiments, the first end face 411 and the first side face 421 may also be inclined relative to the second direction, which can be selected according to the requirements.

[0111] In this embodiment, the first end face and the first side surface are flush, which increases the size of the first gap and makes it easier for the adhesive to enter the receiving area. Simultaneously, it allows for a more regular and simpler shape of the blocking component, improving the assembly efficiency between the blocking component and the main surface and simplifying the installation process. For example, when bonding the blocking component using double-sided adhesive or other bonding methods, the number of positioning points between the blocking component and the main surface can be reduced, thereby simplifying the bonding process and improving installation efficiency.

[0112] Figure 10 Schematic diagram of the structure of the blocking member provided in some embodiments of this application Figure 1 Please refer to Figure 10 According to some embodiments of this application, the blocking member 400 further includes a third blocking part 430 connected to the side of the second blocking part 420 away from the bottom wall 23, the third blocking part 430 extending along the second direction Y.

[0113] It is understood that in this embodiment, the blocking member 400 may include a third blocking member 430 in addition to the first blocking part 410 and the second blocking part 420 in the above embodiments.

[0114] The third blocking part 430 can be provided on the side of the second blocking part 420 away from the bottom wall 23, for example, Figure 10 In this configuration, the third blocking part 430 is connected above the second blocking part 420 along the third direction Z. It can be understood that the third blocking part 430 and the second blocking part 420 can be two independent components, and can be directly or indirectly connected by conventional connection methods, or the two can be integrally formed.

[0115] The third blocking portion 430 may extend in a strip shape along the second direction and may be located at the upper edge of the stress-sensitive region. The dimensional relationship between the third blocking portion 430 and the second blocking portion 420 can be varied, as will be described in subsequent embodiments.

[0116] It is understandable that the third blocking part can also serve to block adhesive, preventing adhesive at the top of the receiving area from overflowing over the top of the second blocking part. The third blocking part can increase the contact area between the blocking part and the main surface, improving the buffering effect. At the same time, the third blocking part is also located between two adjacent main surfaces. The third blocking part and the first blocking part can provide padding and support from the upper and lower sides in a third direction, making the upper and lower force on the two adjacent battery cells more uniform, improving the stability between the two adjacent batteries, and reducing shaking and tilting.

[0117] In addition, the third blocking part extends along the second direction, which has a simple structure and can simplify the installation process of the blocking part.

[0118] Based on some embodiments of this application, continue to refer to Figure 10 The end face of the first end of the third blocking part 430 along the second direction Y is the second end face 431, and the end face of the first end of the second blocking part 420 along the second direction Y is the first side surface 421; the second end face 431 protrudes from the first side surface 421, and there is a second gap 432 between the second end face 431 and the boundary of the first end of the main surface 111 along the second direction Y.

[0119] In this embodiment, for ease of explanation, the first end in the second direction will be referred to as the second end. Figure 10 The right end of the third blocking part 430 in the left-right direction, the end face of the first end of the third blocking part 430 along the second direction Y, can be the right end face of the third blocking part 430, that is, the second end face 431.

[0120] The second end face 431 can be a plane or a curved surface, for example... Figure 10 In this embodiment, the second end face 431 can be a plane perpendicular to the second direction Y. In other embodiments, the first end face 411 can be inclined relative to the second direction.

[0121] The second end face 431 can protrude from the first side surface 421, that is, the first end of the third blocking part 430 along the second direction Y can extend along the second direction to the first side surface 421 protruding from the second blocking part 420.

[0122] Furthermore, the boundary of the first end of the main surface 111 along the second direction Y is Figure 10 A second gap 432 may exist between the second end face 431 and the right boundary of the main surface 111. Thus, the second end face 431 of the third blocking portion 430 is located within the main surface 111, and is neither flush with nor protruding from the boundary of the main surface. This second gap 432 can connect to the receiving area 112.

[0123] In this embodiment, the second end face protrudes from the first side surface, which increases the overall area of ​​the blocking member and thus enhances the buffering effect. The second gap allows the receiving area to communicate with the external environment, facilitating the smooth entry of adhesive into the receiving cavity. Furthermore, the portion of the third blocking part protruding from the second blocking part can serve as the top boundary of the receiving area, and in the event of excessive adhesive, it can reduce the openings for adhesive overflow from the receiving cavity, thereby mitigating the short-circuit contamination problem caused by adhesive overflow.

[0124] Figure 11 Schematic diagram of the structure of the blocking member provided in some embodiments of this application Figure 2 Please refer to Figure 11 According to some embodiments of this application, the end face of the first end of the third blocking part 430 along the second direction Y is the second end face 431, and the end face of the first end of the second blocking part 420 along the second direction Y is the first side surface 421; the first side surface 421 is flush with the second end face 431.

[0125] This embodiment and Figure 10 The difference in the illustrated embodiment is that the first side surface 421 is flush with the second end surface 431; that is, the third blocking portion 430 does not protrude from the second blocking portion 420 along the second direction, but rather the two are flush. For example, Figure 10 The second end face 431 and the first side face 421 can be located in the same plane, which can be perpendicular to the second direction Y.

[0126] In other embodiments, the second end face 431 and the first side surface 421 may also be inclined relative to the second direction, which can be selected according to the requirements.

[0127] In this embodiment, the second end face is flush with the first side surface, which increases the size of the second gap, allowing for smoother airflow from the receiving area and easier entry of the adhesive into the receiving area. Simultaneously, it allows for a more regular and simpler shape of the blocking component, improving assembly efficiency between the blocking component and the main surface and simplifying the installation process. For example, when bonding the blocking component using double-sided adhesive or other bonding methods, the number of positioning points between the blocking component and the main surface can be reduced, thereby simplifying the bonding process and improving installation efficiency.

[0128] Understandable. Figure 10 and Figure 11 In the illustrated embodiment, the first blocking portion protrudes beyond the second blocking portion. In other embodiments, the first blocking portion and the second blocking portion may also be... Figure 9 The structure shown indicates that the first blocking part can be flush with the second blocking part. Alternatively, one end of the first blocking part along the second direction can be flush with the second blocking part, while the other end of the first blocking part along the second direction can protrude from the second blocking part. The specific configuration can be adjusted according to the actual situation.

[0129] In some embodiments, one end of the third blocking portion along the first direction may be flush with the second blocking portion, and the other end of the third blocking portion along the second direction may protrude from the second blocking portion.

[0130] Based on some embodiments of this application, continue to refer to Figures 5 to 11 The second blocking part 420 includes two blocking bodies 423 extending along the third direction Z, and the first blocking part 410 is connected to one blocking body 423 at each end along the second direction Y. The outer side of the blocking body 423 away from the other blocking body 423 has a receiving area 112; wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0131] In this embodiment, the second blocking portion 420 may include two blocking bodies 423, each of which may extend in the third direction Z. The blocking body 423 may be a strip-shaped structure.

[0132] Furthermore, the two blocking bodies 423 can be respectively connected to both ends of the first blocking portion 410 along the second direction. It is understood that these two ends refer to the ends relative to the middle position of the first blocking portion, not exactly located at the end face. The blocking bodies 423 can be as follows: Figure 9 and Figure 11 The end faces of the first blocking portion are flush with the end face shown, or the end faces of the first blocking portion 410 can be as shown. Figure 8 and Figure 10 It is shown as slightly protruding from the outside of the barrier.

[0133] In this embodiment, two blocking bodies 423 can be spaced apart along the second direction, with a hollow region in between. This region can be a stress-sensitive region, meaning the two blocking bodies can be located at the left and right boundaries of the stress-sensitive region, respectively, so that the first blocking part and the second blocking part can enclose the stress-sensitive region. One blocking body 423 can have a receiving area 112 on its outer side away from the other blocking body 423. Each blocking body 423 is used to block overflowing adhesive within the receiving area on its outer side. Of course, in other embodiments, each blocking body 423 can have a receiving area 112 on its outer side away from the other blocking body; that is, the blocking member can form two receiving areas on its main surface.

[0134] By incorporating two blocking elements, the material used in the blocking components can be reduced while achieving the desired blocking effect, thus lowering manufacturing costs. Simultaneously, the hollow area between the two blocking elements provides sufficient space for the expansion of the battery cell, improving its reliability.

[0135] According to some embodiments of this application, such as Figure 6 and Figure 8The first blocking body 424 is the blocking body 423 connected to the first end of the first blocking part 410 along the second direction Y. The first dimension D2 between the inner side of the first blocking body 424 facing the other blocking body 423 and the boundary of the first end of the main surface 111 along the second direction Y satisfies: 0.25×T≤D2≤0.5×T; where T is the dimension of the battery cell 11 along the first direction X.

[0136] One of the two blocking bodies 423, located at its first end along the second direction Y, is designated as the first blocking body 423, that is... Figure 8 The rightmost barrier is the first barrier 423. Its inner surface is defined by the side of the first barrier facing the other barrier. The boundary of the first end of the main surface 111 along the second direction Y is... Figure 8 The right boundary of the main surface.

[0137] like Figure 8 In this context, the dimension of the battery cell 11 along the first direction X is the thickness T of the battery cell, which is also the distance between the two main surfaces of the battery cell 11.

[0138] The first dimension D2 is the distance between the inner surface of the first blocking body 423 and the right boundary of the main surface. When the inner surface is curved or inclined, D2 can be the maximum distance between the inner surface of the first blocking body 423 and the right boundary of the main surface. D2 and T can have the following relationship: 0.25×T≤D2≤0.5×T, that is, D2 is greater than or equal to 0.25 times T and less than or equal to 0.5 times T. For example, D2 can be equal to 0.25×T, 0.3×T, 0.35×T, 0.4×T, 0.45×T, 0.5×T, etc.

[0139] It is understood that the housing 13 of a battery cell can typically accommodate one or two electrode assemblies 14. The electrode assembly may include a straight region 141 located in the middle and two bent regions 142 located at both ends of the straight region 141 along the second direction. When the housing accommodates one electrode assembly, the bent region of the electrode assembly can be a semi-cylindrical structure with a diameter approximately equal to the thickness of the battery cell, i.e., T, and a radius of 0.5 × T. That is, on the main surface 111, the dimensions of the bent regions on both sides of the electrode assembly 14 along the second direction Y are approximately 0.5 × T.

[0140] Similarly, when the housing 13 contains two electrode assemblies, the bending area of ​​the electrode assembly can be two semi-cylindrical structures stacked along the first direction. The diameter of one semi-cylindrical structure can be approximately half the thickness of the battery cell, i.e., 0.5×T, while the radius can be 0.25×T. That is, on the main surface 111, the dimensions of the bending areas on both sides of the electrode assembly 14 along the second direction Y are approximately 0.25×T.

[0141] By setting D2 to be greater than or equal to 0.25 times T and less than or equal to 0.5 times T, the area on the main surface 111 corresponding to the bending area can be used as much as possible to set up a barrier, so that the adhesive is less likely to invade the stress-sensitive area corresponding to the straight area on the main surface, thereby reducing the impact of stress concentration on the reliability of the battery cell.

[0142] In other embodiments, D2 may have other ranges, such as 0.3×T≤D2≤0.5×T, or 0.25×T≤D2≤0.45×T, or 0.3×T≤D2≤0.45×T, etc.

[0143] In this embodiment, by setting D2 to be greater than or equal to 0.25×T, sufficient size can be reserved for the receiving area, thereby preventing overflow of adhesive from easily spilling out of the receiving area and thus improving the short-circuit contamination problem caused by adhesive overflow. By setting D2 to be less than or equal to 0.5×T, the area occupied by the obstruction and the receiving area on the main surface of the battery cell can be minimized, thus improving the stress concentration problem on the main surface.

[0144] In other embodiments, a receiving area can be provided on the outer side of both blocking members, corresponding to the second end along the second direction ( Figure 8 The blocking element at the left end and the left boundary of the main surface can also satisfy the first dimension D2 mentioned above.

[0145] Based on some embodiments of this application, continue to refer to Figure 8 The dimension W2 of the blocking body 423 along the second direction Y satisfies the following condition with respect to the first dimension D2: 0.1×D2≤W2≤0.5×D2.

[0146] Wherein, W2 is the width dimension of the blocking body 423, such as the width dimension of the first blocking body 424 along the second direction. When the width of the blocking body changes along the third direction Z, W2 can be its maximum width dimension.

[0147] In this embodiment, W2 and D2 satisfy the condition 0.1×D2≤W2≤0.5×D2, that is, W2 is greater than or equal to 0.1 times D2 and less than or equal to 0.5 times D2. For example, W2 can be equal to 0.1×D2, 0.2×D2, 0.3×D2, 0.4×D2, 0.5×D2, etc.

[0148] Of course, the relationship between W2 and D2 can also have other ranges of values, such as 0.2×D2≤W2≤0.5×D2, 0.1×D2≤W2≤0.4×D2, or 0.2×D2≤W2≤0.4×D2, etc.

[0149] In this embodiment, by setting W2 to be greater than or equal to 0.1 × D2, the width of the barrier can be increased, thereby enhancing its blocking effect on the adhesive and mitigating the problem of adhesive easily overflowing from the receiving area. Furthermore, by setting W2 to be less than or equal to 0.5 × D2, the area occupied by the barrier on the main surface of the battery cell can be minimized, mitigating the problem of stress concentration on the main surface. Sufficient space is provided for the receiving area to prevent overflowing adhesive from easily spilling out.

[0150] It is understandable that D2 and W2 are not only applicable to... Figure 8 The illustrated embodiment can also be applied to other embodiments that include two blocking elements, such as... Figure 9 , Figure 10 as well as Figure 11 The illustrated embodiment.

[0151] Figure 12 Schematic diagram of the structure of the blocking member provided in some embodiments of this application Figure 3 Please refer to Figure 12 According to some embodiments of this application, the end face of the first end of the second blocking portion 420 along the second direction Y is taken as the first side surface 421, and the end face of the second end of the second blocking portion 420 along the second direction Y is taken as the second side surface 422. The second blocking portion 420 covers the area located between the first side surface 421 and the second side surface 422.

[0152] In this embodiment, the end face of the first end of the second blocking portion 420 along the second direction Y is the first side surface 421, that is... Figure 12 The rightmost end face of the second blocking part 420 is the first side surface.

[0153] The end face of the second end of the second blocking part 420 along the second direction Y is the second side surface 422, that is... Figure 12 The leftmost end face of the second blocking part 420 is the second side surface 422. It can be understood that the first side surface 421 and the second side surface 422 are the end faces of opposite ends along the second direction.

[0154] In this embodiment, the second blocking part 420 can be distinguished from... Figure 8 Instead of a split structure, it is a single, sheet-like structure. That is, the second blocking portion 420 can extend from the first side surface 421 along the second direction Y to the second side surface 422, and the portion between the first side surface and the second side surface is a complete surface.

[0155] Understandable. Figure 12The embodiment also shows a third blocking portion 430 located on top of the second blocking portion 420, and the two end faces of the third blocking portion 430 and the two end faces of the first blocking portion 410 respectively protrude from the second blocking portion along the second direction. In other embodiments, the third blocking portion may not be provided above the second blocking portion 420 in this embodiment, and can be provided according to the actual situation. In addition, the side surface of the second blocking portion provided in this embodiment may be flush with the end face of the first blocking portion or with the end face of the third blocking portion.

[0156] It is understood that in this embodiment, the blocking member 400 may be made of a buffer material that can deform under external force, such as expansion force, thereby providing space for the expansion of the battery cell.

[0157] In this embodiment, by setting the second blocking part as a whole structure, the contact pressure can be reduced, the impact energy can be dispersed, the buffering effect can be improved, and the stability between two adjacent battery cells can be improved.

[0158] According to some embodiments of this application, the blocking member 400 is bonded between two adjacent battery cells 11.

[0159] In this embodiment, the blocking member 400 can be bonded to two adjacent battery cells 11 via an adhesive portion. The adhesive portion can have various structures, such as glue. Alternatively, the adhesive portion can be double-sided adhesive. By providing double-sided adhesive with the same area on both sides of the blocking member, the blocking member can be bonded to two adjacent battery cells. Moreover, double-sided adhesive does not have the problem of glue overflow, making it more convenient to use and improving assembly efficiency.

[0160] In this embodiment, the assembly of the blocking component can be quickly achieved by bonding the blocking component, so that the blocking component can be tightly attached to the two main surfaces, improving the blocking effect on the adhesive, reducing the shaking and movement of the blocking component relative to the battery cell, and making the force more uniform.

[0161] Based on some embodiments of this application, continue to refer to Figure 8 The two receiving areas 112 are symmetrically arranged about the center plane 15 of the battery cell 11; wherein the center plane 15 is a plane passing through the geometric center of the battery cell 11 and perpendicular to the second direction Y.

[0162] In this embodiment, the center plane 15 can be a plane perpendicular to the second direction Y, and can pass through the geometric center of the battery cell 11.

[0163] The blocking member 400 can be symmetrically arranged along the central plane, so that a receiving area 112 can be respectively provided on both sides of the blocking member 400 along the second direction Y. For example... Figures 8 to 12In various embodiments, the second blocking portion 420 may have a receiving area 112 on the outer side of its first end along the second direction, and the second blocking portion 420 may have a receiving area 112 on the outer side of its second end along the second direction. These two receiving areas may also be symmetrically arranged about the central plane 15.

[0164] In this embodiment, receiving areas are provided on both sides of the blocking member, which can accommodate more adhesive and allow the adhesive to enter the receiving areas from both sides of the blocking member. The symmetrical arrangement of the receiving areas makes the distribution of adhesive more uniform and improves the bonding effect.

[0165] Based on some embodiments of this application, continue to refer to Figure 8 The dimension W1 of the first blocking part 410 along the third direction Z and the dimension H of the main surface 111 along the third direction Z satisfy: 1%×H≤W1≤10%×H, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other; and / or, the dimension L1 of the first blocking part 410 along the second direction Y and the dimension W of the battery cell 11 along the second direction Y satisfy: W-10mm≤L1≤W-1mm; and / or, the distance D1 between the outer side of the first blocking part 410 facing the bottom wall 23 and the bottom surface of the battery cell 11 facing the bottom wall 23 satisfies: 0mm≤D1≤3mm.

[0166] Wherein, W1 can be the height dimension of the first blocking part 410 along the third direction, and the height dimension of the main surface 111 along the third direction Z can be H. W1 and H satisfy 1%×H≤W1≤10%×H. W1 can be greater than or equal to 1% multiplied by H and less than or equal to 10% multiplied by H. For example, W1 can be 1%×H, 2%×H, 3%×H, 4%×H, 5%×H, 6%×H, 7%×H, 8%×H, 9%×H or 10%×H, etc.

[0167] Of course, there can be other ranges of values ​​between W1 and H, such as 2%×H≤W1≤10%×H, 1%×H≤W1≤9%×H, or 2%×H≤W1≤9%×H, etc.

[0168] By setting W1 to be greater than or equal to 1%×H, the height of the first blocking part can be increased, thereby enhancing its blocking effect on the adhesive and mitigating the problem of adhesive easily infiltrating the main surface. By setting W1 to be less than or equal to 10%×H, the area occupied by the first blocking part on the main surface of the battery cell can be minimized, thus improving the stress concentration problem on the main surface.

[0169] In some embodiments, L1 can be the width dimension of the first blocking part 410 along the second direction, and the width dimension of the main surface 111 along the second direction Y can be W. L1 and W satisfy W-10mm (millimeters) ≤ L1 ≤ W-1mm. For example, W1 can be W-10mm, W-9mm, W-8mm, W-7mm, W-6mm, W-5mm, W-4mm, W-3mm, W-2mm, W-1mm, etc.

[0170] Of course, there can be other ranges of values ​​between W1 and H, such as W-9mm≤L1≤W-1mm, W-10mm≤L1≤W-2mm, or W-9mm≤L1≤W-2mm, etc.

[0171] By setting L1 to be greater than or equal to W-10mm, the width of the first blocking part can be increased, thereby enhancing its blocking effect on the adhesive and mitigating the problem of adhesive easily infiltrating the central area of ​​the main surface. By setting L1 to be less than or equal to W-1mm, the area occupied by the blocking body on the main surface of the battery cell can be minimized, reducing material usage and manufacturing costs.

[0172] It is understandable that the edges of the housing are usually rounded to reduce stress concentration. By setting L1 to be less than or equal to W-1mm, the first blocking part can avoid the rounded corner area as much as possible, which makes it easier to stick or install the first blocking part, improves the problem that the edge of the first blocking part is easy to connect to the rounded corner and warp, and improves stability.

[0173] In some embodiments, the distance D1 between the lower side of the first blocking portion 410 facing the bottom wall 23 and the bottom surface of the battery cell 11 facing the bottom wall 23 satisfies: 0mm ≤ D1 ≤ 3mm. It can be understood that when the distance between the first blocking portion and the bottom surface is not uniform, D1 can be the minimum distance.

[0174] When D1 is 0mm, the lower side of the first blocking part 410 can be flush with the lower edge of the main surface. When D1 is not 0mm, the lower side of the first blocking part can have space, which facilitates the positioning and bonding of the first blocking part and simplifies the assembly process.

[0175] In this embodiment, D1 can be 0mm, 1mm, 2mm, 3mm, etc. Of course, D1 can also have other values, such as 0.5mm≤D1≤3mm, 0mm≤D1≤2.5mm, or 1mm≤D1≤2.5mm, etc.

[0176] Setting D1 to be greater than or equal to 0 mm facilitates the positioning and adhesion of the first blocking part. Setting D1 to be less than or equal to 3 mm increases the area of ​​the region above (inner side) the first blocking part, thereby increasing the area of ​​the adhesive on the main surface and improving stress concentration issues.

[0177] According to some embodiments of this application, the distance L2 between the side of the blocking member 400 away from the bottom wall 23 and the first blocking part 410 satisfies the following relationship between the main surface 111 and the dimension H along the third direction Z: 20%×H+6mm≤L2≤98%×H; wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0178] Here, L2 can refer to the distance between the top of the blocking member 400 and the inner side of the first blocking portion 410. It can be understood that in... Figure 8 and Figure 9 In the embodiment shown without the third blocking portion 430, L2 can refer to the height of the second blocking portion 420 along the third direction Z. However, in the embodiment with the third blocking portion 430, such as... Figures 10 to 12 As shown, L2 refers to the height of the second blocking part 420 and the third blocking part 430 in the third direction.

[0179] The relationship between L2 and H satisfies 20%×H+6mm≤L2≤98%×H. L2 can be greater than or equal to 20% multiplied by H plus 6mm and less than or equal to 98% multiplied by H. For example, L2 can be 20%×H+6mm or 98%×H, etc.

[0180] Of course, there can be other ranges of values ​​between L2 and H, such as 20%×H+10mm≤L2≤98%×H, 20%×H+6mm≤L2≤96%×H, or 20%×H+10mm≤L2≤96%×H, etc.

[0181] By setting L2 to be greater than or equal to 20% × H + 6 mm, the height of the second blocking part can be increased, thereby enhancing its blocking effect on the adhesive within the receiving area and making it less likely for the adhesive to cross the top of the second blocking part and invade the main surface. Simultaneously, by setting L2 to be less than or equal to 98% × H, the top of the blocking part can be located within the main surface and avoid the rounded corners at the top of the housing, facilitating the bonding and positioning of the blocking part.

[0182] This application provides an electrical device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to provide electrical energy.

[0183] Electrical devices include vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc.

[0184] It is understood that the electrical device provided in this application, by using any of the aforementioned battery devices 100, has all the beneficial effects of the aforementioned battery devices 100, which will not be elaborated here.

[0185] This application provides an energy storage device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to store electrical energy.

[0186] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, and so on.

[0187] It is understood that the energy storage device provided in this application, by using any of the aforementioned battery devices 100, has all the beneficial effects of the aforementioned battery devices 100, which will not be elaborated here.

[0188] Please refer to Figures 4 to 8 This application provides a battery device 100, including: a housing 20 and a battery cell assembly 10; the battery cell assembly 10 is bonded to the bottom wall 23 of the housing 20, and the battery cell assembly 10 includes a blocking member 400 and a plurality of battery cells 11 arranged along a first direction X. Each battery cell 11 has a main surface 111 perpendicular to the first direction X, and the main surface 111 is the surface with the largest area among the battery cells 11; the blocking member 400 is located between the main surfaces 111 of two adjacent battery cells 11, and the end of the blocking member 400 facing the bottom wall 23 has a first blocking portion 410. The blocking member 400 also includes a portion connected to the first blocking portion 410. The first blocking part 410 is located on the inner side of the bottom wall, and the second blocking part 420 includes two blocking bodies 423 extending along the third direction Z. The first blocking part 410 is connected to one blocking body 423 at each end along the second direction Y. Each blocking body 423 has a receiving area 112 on the outer side away from the other blocking body 423. The first blocking part 410 is used to prevent the adhesive at the bottom wall 23 from overflowing into the inner side of the first blocking part 410, and each blocking body 423 is used to block the overflowed adhesive in the receiving area 112 on the outer side of the blocking part. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0189] In this embodiment, the blocking component can be roughly U-shaped. The first blocking portion at the bottom of the blocking component can form a blocking structure at the bottom edge of the battery cell, while the second blocking portion can form vertical blocking structures on both sides of the bottom edge of the battery cell. The first and second blocking portions roughly form a U-shaped structure. Furthermore, receiving areas are formed on both sides of the second blocking portion, where the adhesive can be contained, achieving three-dimensional confinement and physical barrier of the adhesive. When assembling the battery cell assembly, the adhesive can be applied to the bottom wall first, and then the battery cell assembly can be placed on the adhesive. Due to the blocking and restriction of the blocking component, the adhesive can enter the receiving area and cure, thus forming a stable bonding process.

[0190] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; A battery cell assembly is bonded to the bottom wall of the housing. The battery cell assembly includes a blocking member and a plurality of battery cells arranged along a first direction. The battery cell has a main surface perpendicular to the first direction, and the main surface is the surface with the largest area among the battery cells. The blocking member is located between the main surfaces of two adjacent battery cells, and the blocking member has a first blocking portion at one end facing the bottom wall. The blocking member also includes a second blocking portion connected to the inner side of the first blocking portion away from the bottom wall. The outer sides of the two ends of the second blocking portion along the second direction each have a receiving area located between two adjacent battery cells. The first blocking portion is used to prevent the adhesive at the bottom wall from overflowing into the inner side of the first blocking portion, and the second blocking portion is used to block the overflowed adhesive within the receiving area. Wherein, the first direction is perpendicular to the second direction.

2. The battery device according to claim 1, characterized in that, The first blocking portion extends along the second direction, and there is a first gap between the first end face of the first end of the first blocking portion along the second direction and the boundary of the first end of the main surface along the second direction, the first gap communicating with the receiving area outside the first end of the second blocking portion along the second direction.

3. The battery device according to claim 1, characterized in that, The first end face of the first blocking part along the second direction is taken as the first end face, and the first end face of the second blocking part along the second direction is taken as the first side surface; the first end face protrudes from the first side surface.

4. The battery device according to claim 1, characterized in that, The first end face of the first blocking part along the second direction is taken as the first end face, and the first end face of the second blocking part along the second direction is taken as the first side surface; the first side surface is flush with the first end face.

5. The battery device according to any one of claims 1-4, characterized in that, The blocking member further includes a third blocking portion connected to the side of the second blocking portion away from the bottom wall, the third blocking portion extending along the second direction.

6. The battery device according to claim 5, characterized in that, The end face of the first end of the third blocking part along the second direction is taken as the second end face, and the end face of the first end of the second blocking part along the second direction is taken as the first side surface. The second end face protrudes from the first side surface, and there is a second gap between the second end face and the boundary of the first end of the main surface along the second direction.

7. The battery device according to claim 5, characterized in that, The end face of the first end of the third blocking part along the second direction is taken as the second end face, and the end face of the first end of the second blocking part along the second direction is taken as the first side surface; the first side surface is flush with the second end face.

8. The battery device according to any one of claims 1-4, characterized in that, The second blocking portion includes two blocking bodies extending along a third direction, and the first blocking portion is connected to one of the blocking bodies at each end along the second direction, and the blocking body has the receiving area on the outside away from the other blocking body; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

9. The battery device according to claim 8, characterized in that, The first blocking body is a blocking body connected to the first end of the first blocking part along the second direction. The first dimension D2 between the inner side of the first blocking body facing the other blocking body and the boundary of the first end of the main surface along the second direction satisfies: 0.25×T≤D2≤0.5×T; where T is the dimension of the battery cell along the first direction.

10. The battery device according to claim 9, characterized in that, The dimension W2 of the barrier along the second direction satisfies the following condition with respect to the first dimension D2: 0.1×D2≤W2≤0.5×D2.

11. The battery device according to any one of claims 1-4, characterized in that, The end face of the first end of the second blocking part along the second direction is taken as the first side surface, and the end face of the second end of the second blocking part along the second direction is taken as the second side surface. The second blocking part covers the area between the first side surface and the second side surface.

12. The battery device according to any one of claims 1-4, characterized in that, The blocking component is bonded between two adjacent battery cells.

13. The battery device according to any one of claims 1-4, characterized in that, The two receiving areas are symmetrically arranged about the center plane of the battery cell; wherein the center plane is a plane passing through the geometric center of the battery cell and perpendicular to the second direction.

14. The battery device according to any one of claims 1-4, characterized in that, The dimension W1 of the first blocking portion along the third direction and the dimension H of the main surface along the third direction satisfy: 1% × H ≤ W1 ≤ 10% × H, wherein the first direction, the second direction, and the third direction are mutually perpendicular; and / or, The dimension L1 of the first blocking portion along the second direction and the dimension W of the battery cell along the second direction satisfy the following: W-10mm≤L1≤W-1mm; and / or, The distance D1 between the outer side of the first blocking part facing the bottom wall and the bottom surface of the battery cell facing the bottom wall satisfies: 0mm≤D1≤3mm.

15. The battery device according to any one of claims 1-4, characterized in that, The distance L2 between the side of the blocking member away from the bottom wall and the first blocking part satisfies the following relationship with the dimension H of the main surface along the third direction: 20%×H+6mm≤L2≤98%×H; Wherein, the first direction, the second direction, and the third direction are perpendicular to each other.

16. An electrical appliance, characterized in that, The electrical device includes the battery device as described in claims 1-15, the battery device being used to provide electrical energy.

17. An energy storage device, characterized in that, The energy storage device includes the battery device as described in claims 1-15, the battery device being used to store electrical energy.

Images