Battery devices, energy storage devices, electrical devices and charging networks

Abstract

This application discloses a battery device, an energy storage device, an electrical device, and a charging network, relating to the field of battery technology. The battery device includes a first housing, a battery cell, and a constraint member. The first housing has a cavity, and at least a portion of the battery cell is installed in the cavity. The first housing has first cavity walls on both sides along a first direction. A constraint member is provided on at least one side of the cavity along the first direction. At least one first cavity wall is equipped with a guide member. The constraint member is slidably assembled with the guide member along the first direction. A stop member is installed on the guide member to restrict the movement of the constraint member along the first direction. A force-applying member drives the constraint member to move along the first direction and causes the constraint member to abut against one side wall of the battery cell along the first direction, thereby limiting and constraining the battery cell along the first direction to improve the structural stability and safety of the battery device under complex working conditions.

Description

Technical Field

[0001] This application relates to the field of batteries, and in particular to battery devices, energy storage devices, electrical devices, and charging networks. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important part of the sustainable development of the automotive industry. For electric vehicles, battery technology is an important factor related to their development.

[0003] In battery devices, the sides of individual battery cells lack dedicated limiting structures. When the battery device is used in a vehicle environment or other working conditions with vibration and impact, the individual battery cells may shift laterally, shake, or even collide with each other within the battery box due to the lack of dedicated limiting structures on the sides of the individual battery cells. This reduces the structural stability and safety of the battery device under complex working conditions. Utility Model Content

[0004] In view of the above problems, this application proposes a battery device, an energy storage device, an electrical device, and a charging network, aiming to improve the safety and structural stability of the battery device under complex operating conditions.

[0005] In a first aspect, this application proposes a battery device, the battery device comprising: Battery cell; A first housing has a cavity, in which at least part of the battery cell is installed. Along a first direction, the first housing has two opposing first cavity walls. A constraint member is provided on at least one side of the cavity along the first direction; A guide member, at least one of the first cavity walls is fitted with the guide member, and the constraint member is slidably assembled with the guide member along the first direction; A force-applying component is used to drive the constraint component to move along the first direction and to cause the constraint component to abut against the battery cell. A stop member is mounted on the guide member to restrict the movement of the constraint member along the first direction.

[0006] In the technical solution of this application embodiment, a constraint member is movably provided on at least one first cavity wall. The constraint member is movably installed on the first cavity wall along a first direction. A force-applying member is used to drive the constraint member to move along the first direction and to make the constraint member abut against one side of the battery cell along the first direction to apply a compressive force to the battery cell. This ensures that after the battery cell is placed in the box, the constraint member always remains tightly abutting against the side wall of the battery cell and applies a compressive force to the battery cell. Through the above configuration, on the one hand, the side of the battery cell is limited and constrained to restrict the battery cell from generating unexpected movement or displacement in this direction, thereby improving the structural stability and safety of the battery device under complex working conditions. On the other hand, based on the limitation of the side of the battery cell, the constraint member can also adaptively compensate for the dimensional tolerances of the box or the battery cell. That is, according to the installation position of the battery cell in the box, its position is adaptively adjusted, and the constraint member always remains abutting against the side wall of the battery cell and applies a compressive force to the battery cell, thereby reducing the requirements for manufacturing precision.

[0007] Since the constraint member is directly slidably assembled onto the first cavity wall and uses the first cavity wall as the mounting base, there is no need to add an independent mounting base in the space between the battery cell and the first cavity wall. While ensuring that the constraint member has the same adaptive adjustment range, the space occupied by the arrangement of an additional mounting base can be reduced. Thus, with the same energy density, the size of the battery device along the first direction is smaller, or with the same size of the battery device along the first direction, the energy density of the battery device is greater.

[0008] A guide is installed on at least one first cavity wall, and a constraint is slidably assembled on the guide to guide the constraint to move along a first direction. This allows the constraint to adaptively adjust its position along the first direction according to the position of the battery cell after the battery cell is placed in the box, while maintaining a tight abutment with the side wall of the battery cell. At the same time, the guide for guiding the constraint to move along the first direction is directly installed on the first cavity wall. That is, the guide is directly mounted on the first cavity wall, without the need to add an additional mounting base for the guide in the space between the battery cell and the first cavity wall. This reduces the space occupied in the cavity along the first direction while ensuring that the constraint has the same adaptive adjustment range.

[0009] The guide is equipped with a stop, which allows the constraint to move stably along the first direction under the guidance of the guide without slipping off the guide, thereby improving the installation stability of the constraint.

[0010] In some embodiments, the guide includes at least two guide pins mounted on the first cavity wall, the at least two guide pins being spaced apart along the second direction, the first direction being intersecting the second direction.

[0011] In the technical solution of this application embodiment, the guide includes at least two guide pins spaced apart along the second direction and installed on the first cavity wall. By providing at least two guide pins spaced apart along the second direction, it can provide better guidance for the sliding of the constraint member along the first direction, making the movement of the constraint member along the first direction more stable.

[0012] In some embodiments, along the first direction, the constraint member is provided with a sliding hole corresponding to the guide pin, and the guide pin is at least partially provided in the sliding hole, so that the constraint member is movable and mounted on the first cavity wall along the first direction. The guide pin is fitted with the stop, and the stop is located on the side of the constraint member opposite to the first cavity wall.

[0013] In the technical solution of this application embodiment, the constraint member is provided with a sliding hole corresponding to the guide pin along the first direction. The guide pin is at least partially inserted into the sliding hole, so that the constraint member can adaptively move and adjust within the cavity along the first direction according to the position of the battery cell after it is placed in the box, and maintain a tight abutment with the side wall of the battery cell. While achieving the limitation constraint of the battery cell along the first direction, the requirements for manufacturing precision are reduced. The stop member is installed on the guide pin and is located on the side of the constraint member away from the first cavity wall, so as to restrict the movement of the constraint member along the first direction, prevent the constraint member from slipping off the guide pin, and improve the installation stability of the constraint member.

[0014] In some embodiments, the sliding hole includes a first hole and a second hole that are connected to each other, the second hole being disposed toward the battery cell, and the diameter of the second hole being larger than the diameter of the first hole, so as to form a stop surface between the first hole and the second hole; The guide pin extends at least partially into the second hole on the side facing the battery cell. The stop is installed at the end of the guide pin that extends into the second hole, and the stop engages with the stop surface to restrict the movement of the constraint member along the first direction.

[0015] In the technical solution of this application embodiment, the stop member is installed on the side of the guide pin facing the battery cell and extends into one end of the second hole. Through the stop member and the stop surface, the constraint member can be moved and installed on the first cavity wall in the first direction and will not slip off the guide member, so that the constraint member can be stably moved and adjusted relative to the first cavity wall.

[0016] In some embodiments, the guide pin has an annular groove on the periphery of one end that extends into the second hole, the stop is sleeved on the guide pin and at least partially embedded in the annular groove, and the outer edge of the stop protrudes from the periphery of the guide pin. Along the first direction, the projection of the outer edge of the stop on the constraint member at least partially overlaps with the stop surface.

[0017] In the technical solution of this application embodiment, the projection of the outer edge of the stop member onto the constraint member along the first direction at least partially overlaps with the stop surface. Thus, the movement of the constraint member along the first direction can be limited by the cooperation between the outer edge of the stop member and the stop surface, so that the constraint member will not slip off the guide pin during the movement along the first direction.

[0018] In some embodiments, the guide pin is configured such that when the constraint moves a maximum distance toward the corresponding first cavity wall, the guide pin is located in the sliding hole on the side toward the battery cell, or the side of the guide pin toward the battery cell is flush with the side of the sliding hole toward the battery cell.

[0019] In the technical solution of this application embodiment, during the process of battery cell insertion into the box, the constraint member adaptively moves and adjusts its position to compensate for the manufacturing tolerance in size; the guide pin is configured such that when the constraint member moves to the maximum distance toward the corresponding first cavity wall during the process of adaptively moving and adjusting its position according to the position of the battery cell, the side of the guide pin toward the battery cell is still located in the sliding hole, or the side of the guide pin toward the battery cell is kept flush with the side of the sliding hole toward the battery cell, so as to prevent the battery cell from being punctured by the guide pin protruding out of the sliding hole during the process of battery cell insertion into the box.

[0020] In some embodiments, the force-applying member includes an elastic member disposed between the constraint member and the first cavity wall, the elastic member being used to drive the constraint member to move along the first direction and abut against the battery cell.

[0021] In the technical solution of this application embodiment, the force-applying component includes an elastic component, which is used to drive the constraint component to move toward the battery cell, so that the side of the constraint component facing the battery cell always maintains a tight abutment with the side wall of the battery cell. This allows the constraint component to adaptively compensate for dimensional manufacturing tolerances and always maintain an abutment with the side wall of the battery cell. Under the condition of reducing the manufacturing precision requirements, the battery cell is effectively limited along the first direction, thereby improving the structural stability and safety of the battery device under complex working conditions.

[0022] At the same time, the constraint component and the elastic component work together. When the battery device is subjected to vibration or impact along the first direction, the elastic component can absorb part of the impact energy through elastic deformation, while the constraint component provides support and constraint for the battery cell. The two work together to effectively buffer the battery cell and reduce the damage to the battery cell caused by the impact.

[0023] In some embodiments, the elastic element includes a leaf spring, which has two first abutment portions and a second abutment portion located between the two first abutment portions along its length. The two first abutting portions abut against one of the constraint member and the first cavity wall, and the second abutting portion abuts against the other.

[0024] In the technical solution of this application embodiment, the elastic member includes a leaf spring. By setting the leaf spring between the constraint member and the first cavity wall, and making the second abutting part and the two first abutting parts of the leaf spring abut against the constraint member and the first cavity wall respectively, an elastic force is applied to the constraint member. When the battery cell is installed in the box, the constraint member can adaptively adjust its position and maintain a tight abutting fit with the side wall of the battery cell at all times.

[0025] In some embodiments, along the first direction, the constraint member is provided with a mounting groove on the side opposite to the battery cell and / or the first cavity wall is provided with a mounting groove on the side facing the constraint member, the extending direction of the mounting groove is parallel to the extending arrangement direction of the leaf spring, and the leaf spring is at least partially accommodated in the mounting groove; Using a plane perpendicular to the first direction as a reference plane, the mounting groove is used to constrain the leaf spring along an extension direction perpendicular to the leaf spring.

[0026] In the technical solution of this application embodiment, a mounting groove is provided on the side of the constraint member away from the battery cell and / or on the side of the first cavity wall facing the constraint member, so as to install at least part of the leaf spring in the mounting groove, thereby constraining and limiting the position of the leaf spring in the direction perpendicular to the extension of the leaf spring, so as to restrict the movement of the leaf spring in the direction perpendicular to its extension, and prevent the leaf spring from laterally deflecting or coming out during compression.

[0027] In some embodiments, the leaf spring extends along a second direction, which is perpendicular to the first direction.

[0028] In the technical solution of this application embodiment, the leaf spring extends along a second direction perpendicular to the first direction in the plane where the battery device is located, that is, it is arranged in the horizontal direction. At this time, the mounting groove constrains and limits the leaf spring along the height direction of the battery device, and supports it in the height direction by using the mounting groove, which effectively avoids the leaf spring from sagging or shifting due to its own weight. This allows the leaf spring to maintain its designed position for a long time, ensuring that the elastic force it provides is stable in direction and consistent in magnitude.

[0029] In some embodiments, along the first direction, the constraint member is provided with at least two ribs on the side opposite to the battery cell and / or the first cavity wall is provided with at least two ribs on the side facing the constraint member, and the extending direction of the ribs is parallel to the extending arrangement direction of the leaf spring. Within the reference plane, at least two of the protruding ribs are spaced apart along an extension direction perpendicular to the leaf spring to form the mounting groove between adjacent protruding ribs.

[0030] In the technical solution of this application embodiment, at least two protruding ribs are provided on the side of the constraint member away from the battery cell and / or on the side of the first cavity wall facing the constraint member, and the extension direction of the two protruding ribs is parallel to the extension arrangement direction of the leaf spring, thereby forming the above-mentioned mounting groove between two adjacent protruding ribs. On the one hand, the position of the leaf spring is constrained and limited, and on the other hand, the setting of the protruding ribs also helps to improve the overall structural strength of the constraint member.

[0031] In some embodiments, the surface of the leaf spring is provided with a wear-resistant layer; and / or, the mounting groove is provided with a wear-resistant layer.

[0032] In the technical solution of this application embodiment, by providing a wear-resistant layer on the surface of the leaf spring and / or in the mounting groove, the frictional wear between the leaf spring and the constraint member and / or the first cavity wall can be effectively reduced, while reducing the debris generated by friction and improving the reliability of the battery device.

[0033] In some embodiments, the leaf spring includes a main body and bent portions connected to both ends of the main body in the length direction. The bent portions are bent relative to the main body in the first direction. A first abutting portion is formed at the connection between the bent portions and the main body, and the first abutting portion is arc-shaped. A second abutting portion is located on the main body.

[0034] In the technical solution of this application embodiment, the bent portion is bent relative to the main body portion along the first direction, thereby forming a smoothly transitioned arc-shaped structure at the connection between the bent portion and the main body portion, and the arc-shaped structure forms a first abutting portion for abutting against the constraint member or the first cavity wall. Through this arc-shaped structure, the sharp edge can be prevented from directly contacting the contacting part when the leaf spring is compressed and deformed, thereby preventing scratches on the constraint member or the first cavity wall.

[0035] In some embodiments, a plurality of constraint members are provided, and the plurality of constraint members are arranged sequentially along a second direction, the second direction being intersecting the first direction.

[0036] In the technical solution of this application embodiment, multiple constraint members are provided and arranged sequentially along the second direction. That is, by providing multiple constraint members, multiple battery cells arranged along the second direction in the cavity are supported and constrained, so that each constraint member can adaptively move and adjust its own position according to the position of the corresponding battery cell in the cavity, and maintain a tight support and fit with the side wall of the corresponding battery cell, further reducing the requirements for manufacturing precision.

[0037] In some embodiments, along the first direction, the constraint abuts against the sidewall of one of the battery cells; or Along the first direction, the constraint abuts against the sidewalls of the plurality of battery cells.

[0038] In the technical solution of this application embodiment, the constraint member abuts against a battery cell, that is, the constraint member and the battery cell are set in a one-to-one correspondence; or, each constraint member abuts against the side wall of multiple battery cells, which can reduce the number of constraint members and simplify the assembly process.

[0039] In some embodiments, the first housing includes a support member and a frame. Along a third direction, the frame is connected to one side of the support member and forms the cavity with the support member. The first direction, the second direction, and the third direction intersect each other but are not coplanar.

[0040] In the technical solution of this application embodiment, the first box includes a support member and a frame. Along a third direction, the frame is connected to one side of the support member, thereby enclosing the cavity between the support member and the frame.

[0041] In some embodiments, along the third direction, the constraint member has a guide surface on the side away from the support member; the guide surface is inclined along the third direction from the side away from the support member to the side closer to the support member, toward the direction closer to the battery cell.

[0042] In the technical solution of this application embodiment, a guide surface is provided on the side of the constraint member away from the support member. The guide surface is inclined along the height direction of the battery device, from the side away from the support member to the side closer to the support member, towards the direction closer to the battery cell. When the battery cell is installed in the box, the bottom edge of the battery cell first contacts the guide surface and slides in along the inclined direction of the guide surface, thereby being guided to the preset installation position. Through the above guide surface design, it is possible to avoid hard collision or jamming between the battery cell and the constraint member during the installation process, reduce the assembly difficulty, and improve the assembly efficiency.

[0043] In some embodiments, along the first direction, the constraint member has a groove on the side facing the battery cell; along the third direction, the groove at least penetrates the side of the constraint member away from the support member.

[0044] In the technical solution of this application embodiment, when disassembling a battery cell, an external tool can be inserted into the groove from top to bottom and apply a force to the constraint to move it away from the battery cell, so as to separate the constraint from the side wall of the battery cell, thereby removing the battery cell from the cavity.

[0045] In some embodiments, the constraint member has a planar contact plane on the side facing the battery cell for abutting against the sidewall of the battery cell.

[0046] In the technical solution of this application embodiment, the constraint member is constructed as a planar structure facing the battery cell side and is in surface contact with the side wall of the battery cell. This can effectively reduce the local stress concentration on the side wall of the battery cell when it is in contact with the side wall of the battery cell, thereby effectively preventing excessive local pressure from causing indentations or damage to the surface of the battery cell.

[0047] In some embodiments, the constraint is configured to at least cover and abut against the central region of the battery cell sidewall.

[0048] In the technical solution of this application embodiment, the constraint member at least covers and supports the central area of ​​the battery cell. That is, the point of application of the supporting force from the constraint member on the battery cell is located near the center of the side wall of the battery cell. Therefore, no off-center load torque is generated, and the battery cell will not tilt or twist due to uneven force.

[0049] In some embodiments, the area of ​​the constraint member covering the sidewall of the battery cell accounts for more than 50% of the area of ​​the sidewall of the battery cell.

[0050] In the technical solution of this application embodiment, the area of ​​the constraint member abutting against the side wall of the battery cell accounts for ≥50% of the total area of ​​the side wall of the battery cell. That is to say, the constraint member covers most of the area of ​​the side wall of the battery cell, so that the abutting force can be distributed on a larger contact surface, thereby reducing the pressure per unit area and protecting the surface of the battery cell from damage.

[0051] In some embodiments, the constraint member includes at least one of a carbon fiber composite structure, a glass fiber composite structure, and an aramid fiber composite structure.

[0052] In the technical solution of this application embodiment, the constraint component is made of composite material structure which has high strength and light weight. Under the premise of meeting mechanical performance requirements, the weight of the battery device is reduced, which helps to achieve the lightweighting of the battery device.

[0053] In some embodiments, the sidewall of the battery cell includes a first surface and a second surface connected together, the first surface and the second surface intersect each other, and the area of ​​the first surface is larger than the area of ​​the second surface; the constraint member abuts against the second surface.

[0054] In the technical solution of this application embodiment, by having the constraint member abut against the second surface of the battery cell, the battery cell is limited and constrained in a direction perpendicular to the stacking of battery cells, thereby improving the installation stability of the battery cell in the battery device.

[0055] Secondly, this application proposes an energy storage device, which includes the battery device described in the first aspect, the battery device being used to store or provide electrical energy.

[0056] Thirdly, this application proposes an electrical device, which includes the battery device described in the first aspect or the energy storage device described in the second aspect, wherein the battery device is used to store or provide electrical energy.

[0057] Fourthly, this application proposes a charging network, which includes charging piles and the energy storage device described in the second aspect, wherein the energy storage device is used to provide electrical energy to the charging piles.

[0058] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0059] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: 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 A schematic diagram showing the installation position of the constraint member in the first housing of a battery device provided in some embodiments of this application; Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5This is a top view of the first housing in a battery device provided in some embodiments of this application; Figure 6 for Figure 5 Schematic diagram of the BB section structure; Figure 7 for Figure 6 Enlarged schematic diagram of the structure at point C; Figure 8 This is a schematic diagram of the constraint structure in a battery device provided in some embodiments of this application; Figure 9 for Figure 8 Another structural diagram from a different perspective; Figure 10 This is a schematic diagram of the elastic element structure in a battery device provided in some embodiments of this application; Figure 11 This is a schematic diagram of the guide structure in a battery device provided in some embodiments of this application; Figure 12 This is a schematic diagram of the structure of the stop member of the battery device provided in some embodiments of this application.

[0060] The reference numerals in the detailed embodiments are as follows: 1000, vehicles; 100. Battery device; 10. Battery cells; 20. Battery box; 21. First box body; 211. Support member; 212. Frame; 213. Cavity; 214. First cavity wall; 22. Second box body; 30. Constraint; 31. Sliding hole; 311. First hole; 312. Second hole; 313. Stop surface; 32. Mounting groove; 33. Rib; 34. Groove; 35. Guide surface; 40. Guide component; 41. Guide pin; 411. Annular groove; 50. Stop; 51. Arc-shaped part; 511. Clamping hole; 52. Notch; 60. Elastic element; 61. Leaf spring; 611. Main body; 6111. Second supporting part; 612. Bending part; 6121. First supporting part; 70. Beam structure; 200, controller; 300, motor. Detailed Implementation

[0061] 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.

[0062] 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.

[0063] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0064] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0065] 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.

[0066] 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.

[0067] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0068] 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).

[0069] 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", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0070] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the 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.

[0071] The battery device can be a battery pack, which generally includes a housing and multiple individual battery cells housed within the housing.

[0072] In battery devices, the sides of individual battery cells lack dedicated limiting structures. When the battery device is used in a vehicle environment or other conditions involving vibration and impact, the individual battery cells may experience lateral displacement, shaking, or even collisions within the battery box due to the lack of dedicated limiting structures on the sides of the individual battery cells. This reduces the structural stability and safety of the battery device under complex operating conditions.

[0073] Based on the above considerations, in order to limit the side of the battery cell 10 and improve the structural stability and safety of the battery device 100 under complex working conditions, this application provides a battery device 100. The battery device 100 includes a first housing 21, and the first housing 21 has first cavity walls 214 on opposite sides along the first direction X. By sliding the constraint member 30 along the first direction X onto the first cavity wall 214, the force-applying member drives the constraint member 30 to move along the first direction X, so that the constraint member 30 abuts against the battery cell 10. The constraint member 30 is configured to maintain a tight abutment with the side wall of the battery cell 10 and apply compressive force to the battery cell 10 during movement along the first direction X. Thus, through the abutment and compressive engagement between the constraint member 30 and the battery cell 10 along the first direction X, the battery cell 10 is effectively limited and constrained along the first direction X, and the battery cell 10 is restricted from unexpected movement or displacement in this direction, thereby improving the structural stability and safety of the battery cell 10 under complex working conditions.

[0074] A guide member 40 is installed on at least one first cavity wall 214, and a constraint member 30 is slidably assembled on the guide member 40 along the first direction X. A stop member 50 is installed on the guide member 40 to restrict the movement of the constraint member 30 along the first direction X, prevent the constraint member 30 from slipping off the guide member 40, and improve the installation stability of the constraint member 30.

[0075] The constraint member 30 is slidably mounted on the guide member 40 installed on the first cavity wall 214 along the first direction X. During the movement along the first direction X, the constraint member 30 can always maintain a tight abutting fit with the side wall of the battery cell 10 under the action of the force-applying member. Thus, it can adaptively move and adjust its own position according to the actual installation position of the battery cell 10 after it is put into the box, so that the side of the constraint member 30 facing the battery cell 10 always maintains a tight abutting fit with the corresponding battery cell 10 and applies a squeezing force to the battery cell 10. This can adaptively compensate for the dimensional tolerances of the box or the battery cell 10 and reduce the requirements for manufacturing precision.

[0076] The constraint member 30 is directly slidably mounted on the guide member 40 installed on the first cavity wall 214 along the first direction X. That is, the guide member 40 uses the first cavity wall 214 as the mounting base, which avoids adding an independent mounting base for mounting the guide member 40 in the cavity 213. While ensuring that the constraint member 30 has the same adaptive adjustment range along the first direction X, it can reduce the space occupied in the cavity 213 along the first direction X. With the same battery device 100 size, it helps to increase the energy density of the battery device 100, or with the same energy density, it can reduce the size of the battery device 100 along the first direction X.

[0077] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0078] The battery cell 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.

[0079] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage devices, energy storage systems, and charging networks that use the battery device as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0080] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0081] Please refer to Figure 1 , Figure 1 The diagram illustrates the structure of a vehicle according to some embodiments of this application. 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 vehicle 1000, which can be located at the bottom, front, or rear of vehicle 1000. Battery device 100 can be used to power vehicle 1000. For example, battery device 100 can serve as the operating power source for vehicle 1000. Vehicle 100 may also include a controller 200 and a motor 300. Controller 200 controls the battery device 100 to supply power to motor 300, for example, to meet the power needs of vehicle 1000 during startup, navigation, and driving.

[0082] 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.

[0083] Please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 20 and battery cells 10, with the battery cells 10 housed in the battery case 20.

[0084] Multiple battery cells 10 can be provided, and the multiple battery cells 10 can be connected in series, parallel, or mixed via a busbar. As an example, multiple battery cells 10 can form a battery module, which is formed by arranging and fixing multiple battery cells 10 into an independent module. As an example, a battery module can be formed by binding multiple battery cells 10 together with cable ties.

[0085] Each battery cell 10 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 10 that can be recharged after discharge to activate its active materials and continue to be used. The battery cell 10 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 this application embodiment is not limited to this. The battery cell 10 can be cylindrical, flat, cuboid, or other shapes.

[0086] The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar for realizing electrical connection between multiple battery cells 10.

[0087] The battery box 20 provides a accommodating space for the battery cells 10, and the battery box 20 can adopt various structures. In some embodiments, the battery box 20 may include a first box body 21 and a second box body 22. The first box body 21 has a cavity 213 for accommodating the battery cells 10, and the second box body 22 covers the first box body 21. The first box body 21 can be a hollow structure with one open end, and the second box body 22 can be a plate-like structure, covering the open side of the first box body 21 so that the second box body 22 and the first box body 21 together define the cavity 213; the second box body 22 and the first box body 21 can also both be hollow structures with one open end, with the open side of the second box body 22 covering the open side of the first box body 21. Of course, the box formed by the second box body 22 and the first box body 21 can be of various shapes, such as a cylinder, a cuboid, etc. The aforementioned first housing 21 is an important structural support component in the new energy vehicle battery system, used to house and protect the battery cells 10, and also has a significant impact on the collision safety of the entire vehicle and the overall torsional and bending stiffness of the vehicle body.

[0088] Please see Figure 3 and further combine Figure 4 , Figure 3 This is a schematic diagram showing the installation position of the constraint member in the first housing of a battery device provided in some embodiments of this application. Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A; In a first aspect, embodiments of this application provide a battery device 100, which includes a battery cell 10, a first housing 21, a constraint member 30, a guide member 40, and a stop member 50. The first housing 21 has a cavity 213, at least a portion of the battery cell 10 is installed in the cavity 213, and the cavity 213 has two opposing first cavity walls 214 along the first direction X. At least one first cavity wall 214 is equipped with a guide member 40, and the constraint member 30 is slidably assembled with the guide member 40 along the first direction X.

[0089] A constraint member 30 is provided on at least one side of the cavity 213 along the first direction X. The constraint member 30 abuts against the side wall of the battery cell 10 on the side facing the battery cell 10. The constraint member 30 is movably mounted on the first cavity wall 214 along the first direction X. A force-applying member is used to drive the constraint member 30 to move along the first direction X and abut against the side of the battery cell 10 along the first direction X. The constraint member 30 is configured to maintain a tight abutment with the battery cell 10 and apply a squeezing force to the battery cell 10 during the movement along the first direction X under the action of the force-applying member.

[0090] In this embodiment, a constraint member 30 is provided on at least one side of the cavity 213 along the first direction X. Under the action of the force-applying member, the side of the constraint member 30 facing the battery cell 10 abuts against the side wall of the battery cell 10 and applies a compressive force to the battery cell 10, thereby limiting and constraining the battery cell 10 along the first direction X, thereby restricting the battery cell 10 from generating unexpected movement or displacement in the first direction X, so as to improve the structural stability and safety of the battery device 100 under complex working conditions.

[0091] In one embodiment, a constraint member 30 is provided on one side of the cavity 213 along the first direction X. The constraint member 30 is slidably mounted on the guide member 40 installed on the first cavity wall 214 along the first direction X. During the movement along the first direction X, under the action of the force-applying member, the constraint member 30 always maintains a tight abutment with the side wall of the battery cell 10 and applies a squeezing force to the battery cell 10, thereby limiting and constraining the battery cell 10 in the battery device 100 along the first direction X.

[0092] In another embodiment, constraint members 30 are respectively provided on both sides of the cavity 213 along the first direction X. The constraint members 30 are slidably mounted on the guide members 40 installed on the first cavity wall 214 along the first direction X. During the movement along the first direction X, under the action of the force-applying member, the constraint members 30 always maintain a tight abutment with the side wall of the battery cell 10 and apply a squeezing force to the battery cell 10, thereby limiting and constraining the battery cell 10 in the battery device 100 on both sides of the first direction X. The double-sided limiting method can more effectively constrain the movement or displacement of the battery cell 10 in the first direction X, and can further improve the structural stability and safety of the battery device 100 under complex working conditions.

[0093] In this embodiment, under the action of the force-applying member, the constraint member 30 can maintain a tight abutment with the battery cell 10 while moving along the first direction X, and apply a compressive force to the battery cell 10. Thus, it can adaptively move and adjust its own position according to the actual installation position of the battery cell 10 after it is placed in the box, so that the constraint member 30 facing the battery cell 10 always maintains a tight abutment with the corresponding battery cell 10 and applies a compressive force to the battery cell 10. This achieves the limitation and constraint of the battery cell 10 along the first direction X, thereby adaptively compensating for the dimensional tolerances generated in the manufacturing and assembly process of the box and the battery cell 10, and reducing the requirements for manufacturing precision.

[0094] In this embodiment, the constraint member 30 is directly slidably mounted on the guide member 40 installed on the first cavity wall 214 along the first direction X. That is, the guide member 40 directly uses the first cavity wall 214 as the mounting base. Therefore, there is no need to set an additional independent mounting base between the first cavity wall 214 and the battery cell 10. While ensuring that the constraint member 30 has the same adaptive adjustment range along the first direction X, the excessive occupation of the internal space of the cavity 213 along the first direction X is reduced.

[0095] It is understandable that if an additional independent mounting base for installing the guide member 40 is set between the first cavity wall 214 and the battery cell 10, the independent mounting base itself has a certain thickness to resist its own deformation during use and provide sufficient support strength. In the first direction X, the additional independent mounting base will occupy the arrangement space of the battery cell 10. In particular, if the constraint members 30 are arranged on both sides of the cavity 213 along the first direction X, the independent mounting bases added on both sides of the first direction X will occupy more space in the cavity 213.

[0096] In this embodiment, along the first direction X, the constraint member 30 is directly slidably assembled onto the guide member 40 installed on the first cavity wall 214. That is, the guide member 40 directly uses the first cavity wall 214 as the mounting base. This reduces the space occupied in the cavity 213 along the first direction X while keeping the same size of the battery device 100, allowing more battery cells 10 to be arranged in the cavity 213, which helps to improve the energy density of the battery device 100; or, with the same energy density, the size of the battery device 100 along the first direction X can be reduced.

[0097] In this embodiment, the constraint member 30 is slidably assembled with the guide member 40 along the first direction X, thereby providing guidance for the movement of the constraint member 30 along the first direction X. During the installation of the battery cell 10 into the box, the constraint member 30, under the guidance of the guide member 40, adaptively moves and adjusts its position along the first direction X according to the actual installation position of the battery cell 10, always maintaining a tight abutment with the side wall of the battery cell 10 and applying a squeezing force to the battery cell 10, so as to limit and constrain the battery cell 10 along the first direction X, and reduce the unexpected movement or displacement of the battery cell 10 along the first direction.

[0098] It is understandable that the guide member 40 is installed on the first cavity wall 214. The guide member 40, which guides the constraint member 30 to move along the first direction, directly uses the first cavity wall 214 as the mounting base. Therefore, it is not necessary to add an independent mounting base between the battery cell 10 and the first cavity wall 214 to install the guide member 40 and guide the constraint member 30 to move along the first direction X. This avoids the space occupied in the cavity 213 along the first direction X due to the thickness of the independent mounting base itself.

[0099] In this embodiment, the guide member 40, which guides the constraint member 30 to move along the first direction X, is directly installed on the first cavity wall 214. That is, the structure (box wall) of the first box 21 itself is used as the mounting base of the guide member 40. When the constraint member 30 has the same adaptive adjustment range along the first direction X, the space occupied by the cavity 213 along the first direction X can be reduced. Thus, under the same external dimensions of the battery device 100, more space is freed up for the battery cell 10, which is beneficial to improving energy density; or under the same energy density requirements, the overall size of the battery device 100 can be reduced.

[0100] It is understandable that when constraint members 30 are arranged on both sides of the cavity 213 along the first direction X, more space can be saved in the cavity 213 compared to adding an independent mounting base between the first cavity wall 214 and the battery cell 10.

[0101] According to some embodiments of this application, please refer to Figure 3and Figure 4 The guide member 40 includes at least two guide pins 41 mounted on the first cavity wall 214. The at least two guide pins 41 are spaced apart along the second direction. The first direction X and the second direction are intersecting. In one embodiment, the first direction X is perpendicular to the second direction Y.

[0102] In this embodiment, the guide member 40 includes at least two guide pins 41 spaced apart along the second direction Y. By arranging multiple guide pins 41 spaced apart along the second direction Y, the guiding effect on the constraint member 30 along the first direction X is made more stable. Specifically, when the constraint member 30 is subjected to lateral force or deflection torque during sliding, the two guide pins 41 can work together to provide a reverse stabilizing couple, thereby effectively limiting the tilt and sway of the constraint member 30 in the vertical plane and ensuring that it always moves horizontally along the first direction X in the correct posture.

[0103] It is understandable that the more guide pins 41 are set (e.g., three or more), the larger the span of the guide, the stronger the constraint on the sliding posture of the constraint member 30, and the higher the motion stability.

[0104] According to some embodiments of this application, please refer to Figure 3 and Figure 4 Along the first direction X, the constraint member 30 is provided with a sliding hole 31 corresponding to the guide pin 41. The guide pin 41 is at least partially provided in the sliding hole 31 so that the constraint member 30 can be moved and installed on the first cavity wall 214 along the first direction X. The guide pin 41 is provided with a stop member 50, and the stop member 50 is provided on the side of the constraint member 30 away from the first cavity wall 214.

[0105] Specifically, the constraint member 30 is provided with a sliding hole 31 corresponding to the guide pin 41 along the first direction X. The guide pin 41 is at least partially inserted into the corresponding sliding hole 31, thereby guiding the constraint member 30 to move along the first direction X to match the actual installation position of the battery cell 10 during installation in the box. This allows the constraint member 30 to slide along the guide pin 41 along the first direction X, thereby achieving adaptive adjustment of the position of the constraint member 30 and maintaining a tight abutment with the side wall of the battery cell 10 and applying a compressive force to the battery cell 10 to limit and constrain the battery cell 10 along the first direction X. The guide pin 41 is equipped with a stop member 50, which is located on the side of the constraint member 30 away from the first cavity wall 214, to limit the movement of the constraint member 30 along the first direction X, prevent the constraint member 30 from slipping off the guide pin 41, and improve the installation stability of the constraint member 30.

[0106] In this embodiment, a sliding hole 31 is provided through the constraint member 30 along the first direction X, which is slidably engaged with the guide pin 41. The guide pin 41 passes through the sliding hole 31, and the two are slidably engaged, providing precise guidance for the movement of the constraint member 30 along the first direction X.

[0107] Through the through-hole design between the sliding hole 31 and the guide pin 41, the guide pin 41 is inserted into the interior of the constraint member 30, so that the overall external dimensions of the constraint member 30 are not limited or constrained by the guide member 40. This allows the constraint member 30 to be designed to be larger in the plane perpendicular to the first direction X, thereby increasing the contact area with the battery cell 10. The increased contact area can distribute the constraint force applied by the constraint member 30 to the battery cell 10 over a larger area, effectively reducing the pressure per unit area, avoiding local stress concentration, and thus preventing the sidewall of the battery cell 10 from being indented, deformed, or internally damaged due to excessive force.

[0108] In this embodiment, the specific structure of the guide pin 41 is not limited, as long as it can guide the constraint member 30 to move along the first direction X.

[0109] In one embodiment, the guide pin 41 can be a cylindrical pin with a circular cross-section. Correspondingly, the sliding hole 31 provided on the constraint member 30 is a circular hole. The pin is fixedly installed on the first cavity wall 214 by welding, and the pin extends along the first direction X. Its outer surface is precision machined to maintain the smoothness of the surface. The inner diameter of the sliding hole 31 provided through the constraint member 30 along the first direction X is slightly larger than the outer diameter of the pin. The two form a sliding fit to guide the constraint member 30 to slide along the first direction X.

[0110] Using a pin as a guide pin 41 has the advantages of simple structure, convenient installation and low cost.

[0111] In another embodiment, the guide pin 41 can be a guide post with a square cross-section, and correspondingly, the sliding hole 31 provided on the constraint member 30 is a square hole.

[0112] In another embodiment, the guide pin 41 can be a guide post with a triangular or hexagonal cross section, and the corresponding sliding hole 31 provided on the constraint member 30 is a triangular hole or a hexagonal hole.

[0113] According to some embodiments of this application, please refer to Figure 7 , Figure 8 The sliding hole 31 includes a first hole 311 and a second hole 312 that are connected to each other. The second hole 312 is disposed facing the battery cell 10, and the diameter of the second hole 312 is larger than the diameter of the first hole 311, so as to form a stop surface 313 between the first hole 311 and the second hole 312. The guide pin 41 extends at least partially into the second hole 312 on the side facing the battery cell 10. The stop member 50 is installed at one end of the guide pin 41 that extends into the second hole 312, and the stop member 50 is engaged with the stop surface 313 to restrict the movement of the constraint member 30 along the first direction X.

[0114] In this embodiment, a stop 50 is provided at one end of the guide pin 41 that extends into the second hole 312. The stop 50 cooperates with the stop surface 313 to limit the sliding stroke of the constraint member 30 in the direction away from the first cavity wall 214 in the first direction X, so as to prevent the constraint member 30 from slipping off the guide pin 41.

[0115] Specifically, as the constraint member 30 moves away from the corresponding first cavity wall 214 along the first direction X, the stop surface 313 moves synchronously toward the stop member 50 along with the constraint member 30. When the constraint member 30 moves to the maximum distance, the stop surface 313 abuts against the stop member 50 to define the end point of the travel of the constraint member 30 sliding away from the corresponding first cavity wall 214 along the first direction X, thereby restricting the constraint member 30 from continuing to move along the guide pin 41 and preventing the constraint member 30 from slipping off the guide pin 41.

[0116] According to some embodiments of this application, please refer to Figure 7 , Figure 11 , Figure 12 The guide pin 41 has an annular groove 411 on the periphery of one end that extends into the second hole 312. The stop member 50 is sleeved on the end of the guide pin 41 that extends into the second hole 312 and is at least partially embedded in the annular groove 411. The outer edge of the stop member 50 protrudes from the periphery of the guide pin 41. When viewed along the first direction X, the projection of the outer edge of the stop member 50 on the constraint member 30 at least partially overlaps with the stop surface 313.

[0117] Specifically, when the constraint member 30 moves along the first direction X toward a direction away from the first cavity wall 214, the stop surface 313 moves synchronously toward the stop member 50 along with the constraint member 30. When the constraint member 30 moves to the maximum stroke position, since the projection of the outer edge of the stop member 50 on the constraint member 30 overlaps at least partially with the stop surface 313, the stop member 50 abuts against the stop surface 313, thereby restricting the constraint member 30 from continuing to move and preventing the constraint member 30 from slipping off the guide pin 41.

[0118] In one embodiment, the stop member 50 may be a retaining ring (or a spring clip) with an elastic opening. Specifically, the stop member 50 includes an arc-shaped portion 51 with a generally C-shaped profile and a notch 52 on one side. A clamping hole 511 (or process hole) is provided on the ends of the arc-shaped portion 51 on both sides of the notch 52 for cooperating with assembly tools such as spring clip pliers.

[0119] During installation, the operator inserts the tip of the snap ring pliers into the two clamping holes 511 respectively, then grips the pliers handles and applies force to move the two clamping holes 511 away from each other, thereby opening the notch 52 and expanding the inner diameter of the arc-shaped part 51. Subsequently, the expanded arc-shaped part 51 is fitted onto the guide pin 41 and moved to the position of the annular groove 411. At this time, the snap ring pliers are released to remove the external force. The arc-shaped part 51 recovers its deformation due to its own elasticity, the notch 52 retracts, and the inner diameter of the arc-shaped part 51 decreases, thereby tightly fitting into the annular groove 411 and using its elastic force to hold the guide pin 41, thus achieving fixation.

[0120] According to some embodiments of this application, the guide pin 41 is configured such that when the constraint member 30 moves a maximum distance toward the corresponding first cavity wall 214, the side of the guide pin 41 toward the battery cell 10 is located inside the sliding hole 31; or, the side of the guide pin 41 toward the battery cell 10 is flush with the side of the sliding hole 31 toward the battery cell 10.

[0121] Specifically, the constraint member 30 adaptively moves and adjusts its position according to the actual installation position of the battery cell 10, so that the constraint member 30 always maintains a tight abutment with the side wall of the battery cell 10. Especially during the assembly of the battery cell 10 into the box, the guide pin 41 facing the battery cell 10 will not protrude from the sliding hole 31 facing the battery cell 10, or remain flush with the sliding hole 31 facing the battery cell 10, thereby avoiding the protrusion of the guide pin 41 from piercing or scratching the side wall of the battery cell 10, ensuring the safety of assembly, improving the yield of the battery device 100, and protecting the structural integrity of the battery cell 10.

[0122] In one embodiment, a boss may be provided on the first cavity wall 214. When the constraint member 30 moves toward the first cavity wall 214 along the first direction X, when the side of the guide pin 41 facing the battery cell 10 is flush with the side of the sliding hole 31 facing the battery cell 10, the constraint member 30 and the boss provided on the first cavity wall 214 abut against each other to prevent the constraint member 30 from continuing to move toward the first cavity wall 214, thereby preventing the guide pin 41 from extending outward into the sliding hole 31.

[0123] In another embodiment, a boss can be provided on the side of the constraint member 30 away from the battery cell 10. When the constraint member 30 moves toward the first cavity wall 214 along the first direction X, when the side of the guide pin 41 facing the battery cell 10 is flush with the side of the sliding hole 31 facing the battery cell 10, the boss on the constraint member 30 and the first cavity wall 214 abut against each other to prevent the constraint member 30 from continuing to move toward the first cavity wall 214, thereby preventing the guide pin 41 from extending outward into the sliding hole 31.

[0124] In another embodiment, bosses may be provided on the side of the first cavity wall 214 and the constraint member 30 away from the battery cell 10.

[0125] According to some embodiments of this application, please refer to Figure 4 The force-applying component includes an elastic member 60 disposed between the constraint member 30 and the first cavity wall 214. The elastic member 60 is used to drive the constraint member 30 toward the battery cell 10 and abut against the side wall of the battery cell 10.

[0126] Specifically, the elastic member 60 is disposed in the gap between the constraint member 30 and the first cavity wall 214. One end of the elastic member 60 abuts against the first cavity wall 214 and the other end abuts against the constraint member 30, and is used to apply an elastic force toward the battery cell 10 to the constraint member 30 so as to drive the constraint member 30 to abut against the side wall of the battery cell 10.

[0127] With the setting of the elastic member 60, the constraint member 30 can adaptively move and adjust according to the actual position of the battery cell 10, and always maintain close contact with the side wall of the battery cell 10, and apply a squeezing force to the battery cell 10 to achieve limiting constraint on the battery cell 10 along the first direction X.

[0128] It is understandable that the elastic member 60 located between the first cavity wall 214 and the constraint member 30 is the power source for the constraint member 30 to adaptively move and adjust its own position according to the actual installation position of the battery cell 10, thereby maintaining its resistance against the battery cell 10 and applying a squeezing force to the battery cell 10.

[0129] For example, the elastic element 60 can be at least one of a helical spring, a leaf spring, a disc spring, and a rubber spring.

[0130] In this embodiment, by replacing the elastic element 60 with different elastic coefficients, the pre-tightening force applied by the constraint element 30 to the battery cell 10 can be flexibly adjusted, and the limiting pre-tightening force on the battery cell 10 can be controlled and adjusted to adapt to different battery cell 10 models and operating conditions; or when the elastic element 60 structure ages or fails, the limiting pre-tightening force can be restored by replacing the elastic element 60.

[0131] It is understandable that the constraint member 30 and the elastic member 60 work together. When the battery device 100 is subjected to vibration or impact along the first direction X, the elastic member 60 can absorb part of the impact energy through elastic deformation. At the same time, the constraint member 30 provides support and constraint for the battery cell 10. The two work together to effectively buffer the battery cell 10 and reduce the damage to the battery cell 10 caused by the impact.

[0132] That is, when the battery device 100 is subjected to vibration impact along the first direction X, the elastic member 60 can absorb and dissipate the impact energy through its own elastic deformation, while the constraint member 30 restricts the excessive displacement of the battery cell 10. Compared with the rigid limiting scheme, this embodiment can effectively buffer vibration impact, which helps to improve the reliability and service life of the battery device 100 under complex working conditions.

[0133] According to some embodiments of this application, please refer to Figure 4 , Figure 7 , Figure 10 The elastic member 60 includes a leaf spring 61. Along the length of the leaf spring 61, the leaf spring 61 has a first abutment portion 6121 located on both sides and a second abutment portion 6111 located between the two first abutment portions 6121. Along the first direction X, the two first abutment portions 6121 and the second abutment portion 6111 are respectively located on opposite sides of the leaf spring 61. One of the second abutment portion 6111 and the two first abutment portions 6121 abuts against the constraint member 30 and the other abuts against the first cavity wall 214.

[0134] Specifically, the elastic member 60 includes a leaf spring 61, which has a long and thin plate-like structure. Along the length of the leaf spring 61, the leaf spring 61 has a first abutment portion 6121 on both sides and a second abutment portion 6111 between the two first abutment portions 6121. One of the second abutment portion 6111 and the two first abutment portions 6121 abuts against the side of the constraint member 30 away from the battery cell 10, and the other abuts against the first cavity wall 214, thereby forming a three-point contact installation. The compression deformation of the leaf spring 61 applies a force to the constraint member 30, so that during the adaptive movement and adjustment of the constraint member 30 along the first direction X, it can always maintain contact with the battery cell 10 and apply a squeezing force to the battery cell 10, so as to limit and constrain the battery cell 10 along the first direction X.

[0135] In one embodiment, the two first abutting portions 6121 (i.e. both ends) of the leaf spring 61 abut against the side of the constraint member 30 away from the battery cell 10, while the second abutting portion 6111 (i.e. the middle portion) abuts against the first cavity wall 214; at this time, the two ends of the leaf spring 61 exert force on the constraint member 30, and the middle portion is supported by the first cavity wall 214.

[0136] In another embodiment, the two first abutting portions 6121 of the leaf spring 61 abut against the first cavity wall 214, while the second abutting portion 6111 abuts against the side of the constraint member 30 away from the battery cell 10; at this time, the two ends of the leaf spring 61 are supported by the first cavity wall 214, and the middle part applies a force to the constraint member 30.

[0137] Both of the above installation methods can achieve elastic biasing of the leaf spring 61 on the constraint member 30, thereby allowing the constraint member 30 to elastically abut against the side wall of the battery cell 10. The specific method to be adopted can be selected based on factors such as the internal spatial layout of the battery device 100, the force requirements, and the ease of assembly.

[0138] In this embodiment of the application, by selecting leaf springs 61 with different elastic coefficients, the preload applied by the constraint member 30 to the side wall of the battery cell 10 can be flexibly adjusted, thereby achieving precise control and on-demand adjustment of the preload.

[0139] In this embodiment, the leaf spring 61 is bow-shaped. In one embodiment, the leaf spring 61 can be made of spring steel to have good elastic properties and fatigue life.

[0140] It is understandable that the leaf spring 61 has a flat structural feature and occupies very little space in its thickness direction (i.e., the compression direction of the leaf spring 61). Compared with other forms of elastic elements such as coil springs, the leaf spring 61 can significantly reduce the space occupied in the cavity 213 along the first direction X while providing the same elastic force, thereby freeing up more space for the battery cell 10 and improving the energy density of the battery device 100.

[0141] According to some embodiments of this application, please refer to Figure 9 Along the first direction X, the constraint member 30 is provided with a mounting groove 32 on the side away from the battery cell 10 and / or on the side of the first cavity wall 214 facing the constraint member 30. The extension direction of the mounting groove 32 is parallel to the extension arrangement direction of the leaf spring 61. The leaf spring 61 is at least partially housed in the mounting groove 32. Taking a plane perpendicular to the first direction X as a reference plane, the mounting groove 32 is used to constrain the leaf spring 61 along the extension arrangement direction perpendicular to the leaf spring 61 to limit the unintended movement or displacement of the leaf spring 61 along its own extension direction, and to prevent the leaf spring 61 from laterally deflecting or coming out during compression.

[0142] In this embodiment, the width of the mounting groove 32 should match the width of the leaf spring 61. Specifically, the mounting groove 32 has a first sidewall and a second sidewall that are arranged opposite each other along the extension direction of the leaf spring 61. The leaf spring 61 is accommodated between the first sidewall and the second sidewall. The distance between the first sidewall and the second sidewall (i.e., the groove width) is equal to or slightly greater than the width of the leaf spring 61, so as to limit the leaf spring 61 from generating unexpected lateral movement or displacement in the direction perpendicular to its extension direction. Thus, it can effectively prevent the leaf spring 61 from laterally deflecting or coming out of the mounting groove 32 during compression, so that the leaf spring 61 is always in a reliable working position.

[0143] Please see Figure 3 , Figure 4In one embodiment, the leaf spring 61 can be extended along the second direction Y. In this case, the mounting groove 32 also extends along the second direction Y so that at least a portion of the leaf spring 61 can be accommodated in the mounting groove 32. The groove wall of the mounting groove 32 limits and constrains the leaf spring 61 along the third direction Z, so that the leaf spring 61 can be compressed and deformed in the expected direction (first direction X) to apply a limiting preload force to the battery cell 10 through the constraint member 30.

[0144] In another embodiment, the leaf spring 61 can be arranged to extend along the third direction Z. In this case, the mounting groove 32 also extends along the third direction Z. That is, the leaf spring 61 extends along the height direction of the battery device 100. At this time, the groove wall of the mounting groove 32 limits and constrains the leaf spring 61 along the first direction X, so that the leaf spring 61 can be compressed and deformed in the expected direction (first direction X) to apply a limiting preload force to the battery cell 10 through the constraint member 30.

[0145] In another embodiment, the extension direction of the leaf spring 61 can be located between the second direction Y and the third direction Z, that is, the extension direction of the leaf spring 61 is inclined. At this time, the mounting groove 32 also extends along the inclined direction, and the groove wall of the mounting groove 32 limits and constrains the leaf spring 61 in a direction perpendicular to the inclined direction, so that the leaf spring 61 can be compressed and deformed in the expected direction (first direction X) to apply a limiting preload force to the battery cell 10 through the constraint member 30.

[0146] For example, in the case of the leaf spring 61 being arranged in an inclined extension manner, the angle between the leaf spring 61 and the battery device 100 in the height direction can be 30°, 36°, 39°, 42°, 45°, 53°, 60°, etc.

[0147] In this embodiment, the mounting groove 32 can be set only on the side of the constraint member 30 away from the battery cell 10, or only on the side of the first cavity wall 214 facing the constraint member 30, or simultaneously on both the side of the constraint member 30 away from the battery cell 10 and the side of the first cavity wall 214 facing the constraint member 30. The setting position of the mounting groove 32 can be selected according to the actual spatial layout and constraint requirements.

[0148] According to some embodiments of this application, please refer to Figure 3 , Figure 4 The leaf spring 61 extends along the second direction Y, which is perpendicular to the first direction X.

[0149] In this embodiment, the leaf spring 61 extends along the second direction Y, that is, the leaf spring 61 extends horizontally, and the mounting groove 32 also extends horizontally. Specifically, the mounting groove 32 constrains and limits the leaf spring 61 in the height direction (third direction Z) of the battery device 100 and provides support for it. The supporting force is opposite to the direction of the gravity of the leaf spring 61, thereby effectively offsetting the influence of gravity and preventing the leaf spring 61 from sagging and shifting its position. This allows the leaf spring 61 to accurately maintain its preset installation position even under long-term use or vibration conditions, so that the leaf spring 61 can continuously and stably output a constant elastic force of the same direction and magnitude to the limiting structure, thereby providing a reliable limiting preload force for the battery cell 10.

[0150] According to some embodiments of this application, please refer to Figure 8 , Figure 9 Along the first direction X, the constraint member 30 is provided with at least two protruding ribs 33 on the side opposite to the battery cell 10. The extending direction of the protruding ribs 33 is parallel to the extending direction of the leaf spring 61. In the reference plane, at least two protruding ribs 33 are spaced apart along the extending direction perpendicular to the leaf spring 61 to form a mounting groove 32 between two adjacent protruding ribs 33.

[0151] Specifically, in a plane parallel to the reference plane in the above embodiment, at least two protrusions 33 are spaced apart from each other in a direction perpendicular to the extension direction of the leaf spring 61, and the gap between two adjacent protrusions 33 forms a mounting groove 32. At least a portion of the leaf spring 61 is accommodated in the mounting groove 32 and its lateral displacement in the direction perpendicular to the extension direction of the leaf spring 61 is restricted by the protrusions 33.

[0152] In another embodiment, the first cavity wall 214 is provided with at least two protruding ribs 33 on the side facing the constraint member 30. The extending direction of the protruding ribs 33 is parallel to the extending arrangement direction of the leaf spring 61. In the reference plane, at least two protruding ribs 33 are spaced apart along the extending arrangement direction perpendicular to the leaf spring 61 to form a mounting groove 32 between two adjacent protruding ribs 33.

[0153] In another embodiment, the constraint member 30 is provided with at least two protruding ribs 33 on the side away from the battery cell 10 and on the side of the first cavity wall 214 facing the constraint suggestion, thereby forming two mounting grooves 32 on the side of the constraint member 30 away from the battery cell 10 and on the first cavity wall 214, so as to better limit and constrain the leaf spring 61 in the direction perpendicular to its extension.

[0154] In this embodiment, the constraint member 30 and / or the first cavity wall 214 are provided with protruding ribs 33. On the one hand, a mounting groove 32 is formed between two adjacent protruding ribs 33 to limit and constrain the leaf spring 61 along its extension direction perpendicular to its extension direction. On the other hand, the protruding ribs 33 themselves serve as reinforcing ribs, which also significantly improve the structural stiffness and bending strength of the constraint member 30 and / or the first cavity wall 214. Through the above-mentioned arrangement, this embodiment of the application achieves both lateral constraint of the leaf spring 61 and reinforcement of the structure of the constraint member 30 and / or the first cavity wall 214 without adding additional parts.

[0155] According to some embodiments of this application, the surface of the leaf spring 61 is provided with a wear-resistant layer; and / or, the mounting groove 32 is provided with a wear-resistant layer.

[0156] In this embodiment, a wear-resistant layer is provided on the surface of the leaf spring 61, which can effectively reduce wear and debris generated between the leaf spring 61 and the mounting groove 32 due to long-term reciprocating motion, thereby improving the reliability of the battery device 100.

[0157] In another embodiment, a wear-resistant layer can be provided in the mounting groove 32, which can also reduce the wear and debris generated between the leaf spring 61 and the mounting groove 32 due to long-term reciprocating motion, thereby improving the reliability of the battery device 100.

[0158] In another embodiment, wear-resistant layers can be provided on the surface of the leaf spring 61 and in the mounting groove 32, which can further reduce wear and debris generated between the leaf spring 61 and the mounting groove 32 due to long-term reciprocating motion, and improve the reliability of the battery device 100.

[0159] For example, the wear-resistant layer may be at least one of a Teflon coating, a diamond-like carbon coating, a molybdenum disulfide coating, or a nickel-based alloy plating.

[0160] According to some embodiments of this application, please refer to Figure 7 , Figure 10 The leaf spring 61 includes a main body 611 and bent portions 612 connected to both ends of the main body 611 along its length. The bent portions 612 are bent relative to the main body 611 along a first direction. A first abutting portion 6121 is formed at the connection between the bent portion 612 and the main body 611. The first abutting portion 6121 is arc-shaped. A second abutting portion 6111 is located on the main body 611.

[0161] Specifically, the leaf spring 61 is formed by bending a single spring steel plate, including a main body 611 and bent portions 612 connected to both ends of the main body 611 along its length. The bent portions 612 are bent relative to the main body 611 along the first direction X, thereby forming a smoothly transitioning arc-shaped structure at the connection between the bent portions 612 and the main body 611. The arc-shaped structure forms a first abutting portion 6121 for abutting against the constraint member 30 or the first cavity wall 214. Through this arc-shaped structure, the sharp edges can be prevented from directly contacting the contacting parts when the leaf spring 61 is deformed under pressure, thereby preventing scratches on the constraint member 30 or the first cavity wall 214. The second abutting portion 6111 of the leaf spring 61 is located on the main body 611, specifically in the middle area of ​​the main body 611.

[0162] It is understandable that the arc-shaped structure with a smooth transition formed at the connection between the bent part 612 and the main body part 611 can effectively disperse the contact stress during the abutment compared to the sharp corner transition or the right angle transition, thus avoiding local stress concentration and extending the life of the leaf spring 61. At the same time, the arc-shaped surface is smooth and without sharp corners, which can prevent the surface of the constraint member 30 or the first cavity wall 214 from being scratched during sliding or abutment.

[0163] According to some embodiments of this application, please refer to Figure 2 Multiple constraint members 30 are provided, and the multiple constraint members 30 are arranged sequentially along the second direction. The first direction intersects the second direction. Optionally, the first direction X is perpendicular to the second direction Y.

[0164] In this embodiment, multiple constraint members 30 are provided and arranged sequentially along the second direction Y. That is, by setting multiple constraint members 30, multiple battery cells 10 arranged along the second direction Y in the cavity 213 are supported and constrained, so that each constraint member 30 can adaptively move and adjust its own position according to the position of the corresponding battery cell 10 in the cavity 213, maintain a tight support and fit with the side wall of the corresponding battery cell 10, and apply a limiting pre-tightening force to the battery cell 10, further reducing the requirements for manufacturing precision.

[0165] It is understandable that, compared to simply setting up a constraint member 30 that extends a long distance along the second direction Y to limit and constrain the battery cells 10 in the cavity 213 along the first direction X, if the battery cells arranged along the second direction Y are not on the same plane on the side of the first direction X facing the constraint member 30 (the first housing 21 has local unevenness, or the battery cells 10 themselves have dimensional tolerances), it will lead to some battery cells 10 being over-pressured, while some battery cells 10 are unconstrained.

[0166] In this embodiment, multiple constraint members 30 are arranged sequentially along the second direction Y. The length of each constraint member 30 is relatively short, so that it can better adapt to the actual installation position of the battery cell 10 in a small area arranged along the second direction Y, thereby minimizing the occurrence of some battery cells 10 being over-voltaged and some battery cells 10 being unconstrained.

[0167] According to some embodiments of this application, along the first direction X, the constraint member 30 abuts against the sidewall of a battery cell 10; or along the first direction X, the constraint member 30 abuts against the sidewalls of multiple battery cells 10.

[0168] In one embodiment, each constraint 30 abuts against one battery cell 10, that is, the constraint 30 and the battery cell 10 are set in a one-to-one correspondence. The one-to-one configuration enables each constraint 30 to independently adapt to the actual position of its corresponding battery cell 10, avoiding the problem that a certain constraint 30 cannot abut against all battery cells 10 at the same time due to different positional deviations of multiple battery cells 10, which helps to achieve accurate and reliable positioning of each battery cell 10.

[0169] In another embodiment, each constraint 30 abuts against the sidewalls of multiple battery cells 10, which can reduce the number of constraint 30s and simplify the assembly process.

[0170] According to some embodiments of this application, please refer to Figure 3 The first housing 21 includes a support member 211 and a frame 212. Along the third direction Z, the frame 212 is connected to one side of the support member 211 and forms a cavity 213 with the support member 211. The first direction, the second direction and the third direction intersect each other but are not coplanar. Optionally, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0171] In this embodiment, the first housing 21 includes a support member 211 and a frame 212. Along the third direction Z, the frame 212 is connected to one side of the support member 211, thereby enclosing the cavity 213 between the support member 211 and the frame 212. The third direction Z is the height direction of the battery device 100.

[0172] According to some embodiments of this application, please refer to Figure 4 Along the third direction Z, the constraint member 30 has a guide surface 35 on the side away from the support member 211. Along the third direction Z, the guide surface 35 is inclined from the side away from the support member 211 to the side closer to the support member 211, and is positioned towards the direction closer to the battery cell 10.

[0173] In this embodiment, a guide surface 35 is provided on the side of the constraint member 30 away from the support member 211. The guide surface 35 is along the height direction of the battery device 100 and is inclined in the third direction Z from the side away from the support member 211 to the side closer to the support member 211, towards the direction closer to the battery cell 10. When the battery cell 10 is installed in the box, the bottom edge of the battery cell 10 first contacts the guide surface 35 and slides in along the inclined direction of the guide surface 35, thereby being guided to the preset installation position. Through the above-mentioned design of the guide surface 35, it is possible to avoid hard collision or jamming between the battery cell 10 and the constraint member 30 during the installation process, reduce the assembly difficulty, and improve the assembly efficiency.

[0174] Understandably, when the battery cell 10 is not installed in the box, the constraint member 30 is at its furthest position from the corresponding first cavity wall 214 along the first direction X under the action of the leaf spring 61. When the battery cell 10 is installed in the box, the battery cell 10 is guided into the box by the guide surface 35 set on the top of the constraint member 30. At the same time, the constraint member 30 is subjected to the lateral extrusion force of the battery cell 10. The constraint member 30 moves along the guide pin 41 toward the first cavity wall 214. The leaf spring 61 on the side of the constraint member 30 away from the battery cell 10 is subjected to the extrusion force, compresses and deforms, and generates a large pre-tightening force on the side of the battery cell 10, thereby achieving the limitation and constraint of the side of the battery cell 10.

[0175] According to some embodiments of this application, please refer to Figure 4 , Figure 8 Along the first direction X, the constraint member 30 has a groove 34 on the side facing the battery cell 10. Along the third direction Z, the groove 34 penetrates at least through the side of the constraint member 30 away from the support member 211, so that a tool can be inserted to apply force when disassembling the battery cell 10.

[0176] In this embodiment, for the battery device 100 with replaceable battery cells 10, when disassembling the battery cell 10, an external tool can be inserted into the groove 34 from top to bottom and apply a force to the constraint member 30 to move it away from the battery cell 10, so that the constraint member 30 is separated from the side wall of the battery cell 10, thereby temporarily relieving the squeezing and constraint on the battery cell 10, so that the battery cell 10 can be removed from the cavity 213 to realize the repair or replacement of the battery cell 10.

[0177] According to some embodiments of this application, the constraint member 30 has a planar contact plane on the side facing the battery cell 10 for abutting against the sidewall of the battery cell 10.

[0178] In this embodiment, the constraint member 30 is constructed as a planar structure facing the battery cell 10 and is in surface contact with the side wall of the battery cell 10. This can effectively reduce the local stress concentration on the side wall of the battery cell 10 when the constraint member 30 is squeezed and pressed against the side wall of the battery cell 10, thereby effectively preventing excessive local pressure from causing indentations or damage to the surface of the battery cell 10.

[0179] According to some embodiments of this application, the constraint 30 is configured to at least cover and abut against the central region of the sidewall of the battery cell 10.

[0180] In this embodiment, the constraint member 30 at least covers and supports the central region of the battery cell 10. That is, the point of application of the supporting force from the constraint member 30 on the battery cell 10 is located near the center of the side wall of the battery cell 10. Therefore, no off-center load torque is generated, and the battery cell 10 will not tilt or twist due to uneven force, which helps to improve the attitude stability of the battery cell 10 in the cavity 213.

[0181] According to some embodiments of this application, the area of ​​the constraint member 30 covering the sidewall of the battery cell 10 accounts for more than 50% of the sidewall area of ​​the battery cell 10.

[0182] In this embodiment, the area of ​​the constraint member 30 abutting against the side wall of the battery cell 10 accounts for ≥50% of the total area of ​​the side wall of the battery cell 10. In other words, the constraint member 30 covers most of the side wall of the battery cell 10, so that the abutting pressure can be distributed on a larger contact surface, thereby reducing the pressure per unit area and protecting the surface of the battery cell 10 from damage.

[0183] It is understandable that the ratio of the area of ​​the constraint member 30 abutting against the side wall of the battery cell 10 to the total area of ​​the side wall of the battery cell 10 can be 51%, 53%, 55.8%, 54%, 60%, 65%, 67.3%, 69%, 74%, 77%, 78.1%, 80%, 84%, 88.9%, 90%, 91%, 92%, 93.5%, etc.

[0184] According to some embodiments of this application, the constraint member 30 includes at least one of a carbon fiber composite structure, a glass fiber composite structure, and an aramid fiber composite structure.

[0185] In this embodiment, the constraint member 30 is made of composite material structure which has high strength and light weight. Under the premise of meeting mechanical performance requirements, it reduces the weight of the battery device 100 and helps to achieve the lightweighting of the battery device 100.

[0186] It is understandable that the constraint component 30 can be made of carbon fiber reinforced composite material, glass fiber reinforced composite material or aramid fiber reinforced composite material, etc.

[0187] According to some embodiments of this application, the sidewall of the battery cell 10 includes a first surface and a second surface connected together, the first surface and the second surface are intersecting and the area of ​​the first surface is larger than the area of ​​the second surface, and the constraint member 30 abuts against the second surface.

[0188] In this embodiment, the battery cell 10 can be square, and the battery cell 10 can be enclosed by a top cover and side walls to form a cavity for accommodating components such as electrode assemblies. The side walls can be formed by connecting two first surfaces arranged opposite each other along a second direction and two second surfaces arranged opposite each other along the first direction X. Optionally, the first direction X is perpendicular to the second direction Y. Multiple battery cells 10 can be stacked and arranged along the second direction Y to form a battery cell assembly, with the first surfaces of two adjacent battery cells 10 abutting each other. A beam 70 can be provided in the cavity 213. The beam 70 is fixedly connected to the first housing 21 and abuts against the first surface of the outermost battery cell 10 in the battery cell assembly along the second direction Y to limit and constrain the expansion and deformation of the battery cell 10, and at the same time improve the structural strength of the first housing 21.

[0189] In this embodiment, by abutting the second surface of the battery cell 10 against the constraint member 30, the battery cell 10 is limited and constrained in a direction perpendicular to the stacking of the battery cells 10, thereby improving the installation stability of the battery cell 10 in the battery device 100.

[0190] According to some embodiments of this application, a battery device 100 is provided. The battery device 100 includes a first housing 21, a battery cell 10, and a constraint member 30. The cavity 213 has a first cavity wall 214 on each side along the first direction X. A constraint member 30 is installed on each first cavity wall 214 along the first direction X. The constraint member 30 is configured to abut against the side wall of the battery cell 10 and apply a compressive force to the battery cell 10 during movement along the first direction X, thereby limiting and constraining the battery cell 10 on both sides along the first direction X, so as to improve the structural stability and safety of the battery device 100 under complex working conditions.

[0191] The constraint member 30 is slidably mounted on the first cavity wall 214 along the first direction X. The constraint member 30 is configured to maintain a tight abutment with the side wall of the battery cell 10 during movement along the first direction X. Thus, it can adaptively move and adjust its own position according to the actual installation position of the battery cell 10 after it is placed in the box. This ensures that the side of the constraint member 30 facing the battery cell 10 always maintains a tight abutment with the corresponding battery cell 10 and applies a pressing force to the battery cell 10. This adaptively compensates for the dimensional tolerances of the box or the battery cell 10 and reduces the requirements for manufacturing precision.

[0192] The constraint member 30 is directly slidably mounted on the first cavity wall 214 along the first direction X. That is, the constraint member 30 uses the first cavity wall 214 as the mounting base, avoiding the need to add an independent mounting base in the cavity 213. While ensuring that the constraint member 30 has the same adaptive adjustment range along the first direction X, it can reduce the space occupied in the cavity 213 along the first direction X. With the same battery device 100 size, it helps to improve the energy density of the battery device 100, or with the same energy density, it can reduce the size of the battery device 100 along the first direction X.

[0193] Secondly, embodiments of this application propose an energy storage device, which includes a battery device 100 as described in the first aspect, the battery device 100 being used to store or provide electrical energy.

[0194] The energy storage device provided in this application includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 100. The multiple battery devices 100 are connected in series through a bus component to improve 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 improve the capacity of the energy storage device.

[0195] 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 electrical energy when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide electrical energy to relevant users or electrical equipment during peak hours. Energy storage devices can be energy storage containers, energy storage cabinets, and other devices used for energy storage.

[0196] The energy storage device provided in this application embodiment includes the battery device 100 provided by any of the above solutions, and can achieve the same effect, which will not be described in detail here.

[0197] Thirdly, this application proposes an electrical device, which includes a battery device 100 as described in the first aspect or an energy storage device as described in the second aspect, wherein the battery device 100 is used to store or provide electrical energy.

[0198] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 10, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0199] The examples of electrical devices in this application are based on the examples of the battery device 100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 100 described above, and will not be repeated here.

[0200] Fourthly, this application proposes a charging network, which includes charging piles and, in a second aspect, an energy storage device for providing electrical energy to the charging piles.

[0201] In this embodiment, the charging network includes charging piles and energy storage devices. The charging piles are electrically connected to the energy storage devices, which provide power to the charging piles. The charging piles are also electrically connected to a battery device 100 within the energy storage devices via cables. The battery device 100 can provide its stored energy to the charging piles. Each charging pile has one or more connectors for connecting to an electrical device (such as a vehicle 1000), thereby enabling the charging pile to replenish power to the device.

[0202] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0203] 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 by, The battery device includes: Battery cell; A first housing has a cavity, in which at least part of the battery cell is installed. Along a first direction, the first housing has two opposing first cavity walls. A constraint member is provided on at least one side of the cavity along the first direction; A guide member, at least one of the first cavity walls is fitted with the guide member, and the constraint member is slidably assembled with the guide member along the first direction; A force-applying component is used to drive the constraint component to move along the first direction and to cause the constraint component to abut against the battery cell. A stop member is mounted on the guide member to restrict the movement of the constraint member along the first direction.

2. The battery device of claim 1, wherein The guide includes at least two guide pins mounted on the first cavity wall, and the at least two guide pins are spaced apart along a second direction, with the first direction intersecting the second direction.

3. The battery device of claim 2, wherein Along the first direction, the constraint member is provided with a sliding hole corresponding to the guide pin, and the guide pin is at least partially provided in the sliding hole, so that the constraint member is movable and installed on the first cavity wall along the first direction; The guide pin is fitted with the stop, and the stop is located on the side of the constraint member opposite to the first cavity wall.

4. The battery device of claim 3, wherein The sliding hole includes a first hole and a second hole that are connected to each other. The second hole is disposed towards the battery cell, and the diameter of the second hole is larger than the diameter of the first hole, so as to form a stop surface between the first hole and the second hole. The guide pin extends at least partially into the second hole on the side facing the battery cell. The stop is installed at the end of the guide pin that extends into the second hole, and the stop engages with the stop surface to restrict the movement of the constraint member along the first direction.

5. The battery device of claim 4, wherein The guide pin has an annular groove on the periphery of one end that extends into the second hole. The stop is sleeved on the guide pin and at least partially embedded in the annular groove. The outer edge of the stop protrudes from the periphery of the guide pin. Along the first direction, the projection of the outer edge of the stop on the constraint member at least partially overlaps with the stop surface.

6. The battery device of claim 3, wherein The guide pin is configured such that when the constraint moves a maximum distance toward the corresponding first cavity wall, the guide pin is located inside the sliding hole on the side facing the battery cell; or, the side of the guide pin facing the battery cell is flush with the side of the sliding hole facing the battery cell.

7. The battery device of any one of claims 1-6, wherein, The force-applying component includes an elastic element disposed between the constraint member and the first cavity wall, the elastic element being used to drive the constraint member to move along the first direction and abut against the battery cell.

8. The battery device of claim 7, wherein The elastic element includes a leaf spring, which has two first abutting portions and a second abutting portion located between the two first abutting portions along its length. The two first abutting portions abut against one of the constraint member and the first cavity wall, and the second abutting portion abuts against the other.

9. The battery device of claim 8, wherein, Along the first direction, the constraint member is provided with a mounting groove on the side away from the battery cell and / or the first cavity wall is provided with a mounting groove on the side facing the constraint member. The extending direction of the mounting groove is parallel to the extending direction of the leaf spring, and the leaf spring is at least partially accommodated in the mounting groove. Using a plane perpendicular to the first direction as a reference plane, the mounting groove is used to constrain the leaf spring along an extension direction perpendicular to the leaf spring.

10. The battery device of claim 9, wherein, The leaf spring extends along a second direction, which is perpendicular to the first direction.

11. The battery device of claim 9, wherein Along the first direction, the constraint member is provided with at least two protruding ribs on the side away from the battery cell and / or the first cavity wall is provided with the side facing the constraint member, and the extending direction of the protruding ribs is parallel to the extending arrangement direction of the leaf spring. Within the reference plane, at least two of the protruding ribs are spaced apart along an extension direction perpendicular to the leaf spring to form the mounting groove between adjacent protruding ribs.

12. The battery device as claimed in claim 9, characterized in that, The surface of the leaf spring is provided with a wear-resistant layer; and / or, the mounting groove is provided with a wear-resistant layer.

13. The battery device according to any one of claims 8-12, characterized in that, The leaf spring includes a main body and bent portions connected to both ends of the main body along its length. The bent portions are bent relative to the main body along the first direction. The first abutting portion is formed at the connection between the bent portions and the main body, and the first abutting portion is arc-shaped. The second abutting portion is located on the main body.

14. The battery device according to any one of claims 1-6, characterized in that, The constraint members are provided in multiple ways, and the multiple constraint members are arranged sequentially along the second direction, which intersects with the first direction.

15. The battery device according to any one of claims 1-6, characterized in that, Along the first direction, the constraint abuts against the sidewall of one of the battery cells; or Along the first direction, the constraint abuts against the sidewalls of the plurality of battery cells.

16. The battery device according to any one of claims 2-6, characterized in that, The first housing includes a support member and a frame. Along a third direction, the frame is connected to one side of the support member and together with the support member, forms the cavity. The first direction, the second direction, and the third direction intersect each other but are not coplanar.

17. The battery device as claimed in claim 16, characterized in that, Along the third direction, the constraint member has a guide surface on the side away from the support member; The guide surface is inclined along the third direction from the side away from the support member to the side closer to the support member, towards the direction closer to the battery cell.

18. The battery device as claimed in claim 16, characterized in that, Along the first direction, the constraint member has a groove on the side facing the battery cell; Along the third direction, the groove extends at least through the side of the constraint member away from the support member.

19. The battery device according to any one of claims 1-6, characterized in that, The constraint member has a planar contact surface on the side facing the battery cell for abutting against the sidewall of the battery cell.

20. The battery device according to any one of claims 1-6, characterized in that, The constraint is configured to at least cover and abut against the central region of the sidewall of the battery cell.

21. The battery device according to any one of claims 1-6, characterized in that, The area of ​​the constraint member covering the sidewall of the battery cell accounts for more than 50% of the area of ​​the sidewall of the battery cell.

22. The battery device according to any one of claims 1-6, characterized in that, The constraint component includes at least one of the following: carbon fiber composite structure, glass fiber composite structure, and aramid fiber composite structure.

23. The battery device according to any one of claims 1-6, characterized in that, The sidewall of the battery cell includes a first surface and a second surface connected to each other, the first surface and the second surface are intersecting, and the area of ​​the first surface is larger than the area of ​​the second surface. The constraint member abuts against the second surface.

24. An energy storage device, characterized in that, The energy storage device includes the battery device according to any one of claims 1-23, the battery device being used to store or provide electrical energy.

25. An electrical appliance, characterized in that, The electrical device includes a battery device according to any one of claims 1-23 or an energy storage device according to claim 24, wherein the battery device is used to store or provide electrical energy.

26. A charging network, characterized in that, The charging network includes charging piles and the energy storage device as described in claim 24, the energy storage device being used to provide electrical energy to the charging piles.

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