Battery device, electric equipment and energy storage device

Abstract

The utility model relates to a battery device, electric equipment and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a plurality of single batteries, a lower box body and a pressing strip, the lower box body is provided with a containing cavity and comprises a base and a frame arranged on the base in a surrounding mode, the frame comprises two first walls oppositely arranged in the first direction, and the single batteries are contained in the containing cavity and arranged between the two first walls in the first direction; the pressing strip is arranged at the end, away from the base, of the frame and comprises an insulating sheet arranged in the first direction and metal sheets connected to the two ends of the insulating sheet, and the two metal sheets are connected with the two first walls respectively. According to the battery device, the electric equipment and the energy storage device provided by the invention, the structural reliability of the battery device is improved, and the mass energy density of the battery device is further improved.

Description

Technical Field

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

[0002] Battery devices convert chemical energy into electrical energy and are widely used in electric vehicles, energy storage systems, and other equipment to provide the required electrical output. However, in related battery devices, the expansion beam is prone to failure during use, leading to battery device failure or other accidents, thus reducing the reliability of the battery device. Utility Model Content

[0003] In view of the above problems, this application provides a battery device, an electrical device, and an energy storage device, which can improve the structural reliability of the battery device and further improve the mass energy density of the battery device.

[0004] In a first aspect, embodiments of this application provide a battery device, which includes a battery cell, a lower housing, and a pressure strip. The lower housing has a receiving cavity and includes a base and a frame surrounding the base. The frame includes two first walls disposed opposite each other along a first direction. A plurality of battery cells are received in the receiving cavity and arranged between the two first walls along the first direction. The pressure strip is used to press the battery cells onto the base and includes an insulating sheet disposed along the first direction and metal sheets connected to both ends of the insulating sheet. The insulating sheet is pressed onto the side of the battery cell away from the base, and the two metal sheets are respectively connected to the two first walls.

[0005] In the technical solution of this application embodiment, by setting the pressure strip including an insulating sheet disposed along a first direction and metal sheets connected to both ends of the insulating sheet, the pressure strip is connected between the two first walls of the frame through the metal sheets, so as to adapt to the expansion force generated by the battery device with a large energy storage capacity during operation and improve the structural stability of the frame; at the same time, the insulating sheet itself can reduce the weight of the pressure strip while meeting the structural strength requirements, and the insulating sheet has good insulation performance, which reduces the requirements of the pressure strip for insulation design and can improve the mass energy density of the battery device.

[0006] In some embodiments, the metal sheet is detachably connected to the first wall. This design facilitates the subsequent disassembly and assembly of the pressure strip, reduces the difficulty of repairing or replacing components in the battery device, and improves reliability.

[0007] In some embodiments, the metal sheet is provided with a plurality of locking holes spaced apart sequentially along a second direction. The metal sheet is connected to the first wall through a connector passing through the locking holes, and the second direction intersects the first direction. By providing locking holes on the metal sheet and achieving the connection between the pressure strip and the first wall through the cooperation of the locking holes and the connector, the disassembly and assembly process of the pressure strip is simplified, and the disassembly and assembly efficiency is improved.

[0008] In some embodiments, in the second direction, the minimum spacing between adjacent mounting holes is ≥5mm. This reduces the risk of damage to the metal sheet structure due to excessively small gaps between mounting holes, and helps to further improve the structural reliability of the battery device.

[0009] In some embodiments, the battery cell includes a housing and an electrode assembly, the electrode assembly being housed within the housing, and the housing including electrode terminals and a pressure relief component; the projection of the pressure strip onto the base is misaligned with the projections of the electrode terminals and the pressure relief component onto the base. That is, the pressure strip avoids the electrode lead-out structure and pressure relief structure within the battery cell during installation. This reduces the risk of the pressure strip blocking the pressure relief channel of the battery cell and also reduces the risk of the pressure strip itself contacting the electrode lead-out structure, thus reducing the insulation requirements of the pressure strip.

[0010] In some embodiments, the insulating sheet is bonded to the housing. This helps to further improve the structural reliability of the battery device.

[0011] In some embodiments, multiple battery cells form a battery pack along a first direction, and the multiple battery packs are arranged along a second direction; a pressure strip presses the two ends of the pressure strip onto two adjacent battery packs along the second direction, and the second direction intersects with the first direction. That is, a single pressure strip can be used to press two battery packs together simultaneously, which helps to improve the structural compactness of the battery device, reduce the number of pressure strips, and further improve the production and assembly efficiency of the battery device.

[0012] In some embodiments, the battery device further includes an upper housing connected to a lower housing and disposed at one end of the frame away from the base. The upper and lower housings together form a receiving cavity. The upper housing abuts against a pressure strip, and together with the battery pack and the first wall, they form an exhaust channel. This design allows each individual battery cell in the battery pack to communicate with the exhaust channel, improving the exhaust performance of each individual battery cell under emergency conditions, thereby enhancing the reliability of the battery device.

[0013] In some embodiments, a plurality of notches are provided at the end of the first wall away from the base, and the projection of one notch along a first direction at least partially overlaps with the projection of an exhaust channel along the first direction. The notches improve the connectivity between the exhaust channel and the outside, allowing gas in the exhaust channel to be smoothly discharged to the outside of the battery device through the notches, further improving the reliability of the battery device.

[0014] In some embodiments, the dimensions of each notch in the second direction are ≥20mm. That is, the width of the notch is greater than or equal to 20mm, which helps to guide the gas out of the exhaust channel and reduces the risk of high-temperature gas accumulating in the exhaust channel.

[0015] In some embodiments, the upper housing is connected to the pressure strip. This arrangement allows each venting channel to be independent of the others, enabling one venting channel to discharge gases generated by one battery pack in the event of thermal runaway or other accidents, reducing the risk of heat transfer between different battery packs and further improving the reliability of the battery device.

[0016] In some embodiments, the insulating sheet is bonded to the upper housing. This bonding method is simple and easy to implement, which helps reduce the production and assembly cycle of the battery device and improves production efficiency; it also reduces the risk of assembly and noise problems caused by cost reduction.

[0017] In some embodiments, along the second direction, the width of the metal sheet is less than the width of the insulating sheet, and the width of the metal sheet along the second direction is ≥10mm, and the second direction intersects the first direction. By setting the width of the metal sheet in the second direction to be smaller than the width of the insulating sheet in the second direction, the risk of the metal sheet contacting the electrode terminal or the insulating strip can be reduced, which is beneficial to improving the insulation performance of the pressure strip.

[0018] In some embodiments, the orthographic projection of the metal sheet onto the base at least partially overlaps with the orthographic projection of the insulating sheet onto the base, and the metal sheet and the insulating sheet are bonded together. This arrangement is beneficial for improving the production efficiency of the pressure strip and for the flattening design of the pressure strip, which is conducive to further improving the energy density of the battery device.

[0019] In some embodiments, in the first direction, the length of the metal sheet is ≥30mm, and the adhesive area between the metal sheet and the insulating sheet is ≥2500mm². 2 To improve the structural strength of the molding strip.

[0020] In some embodiments, the outer surface of the metal sheet is coated with an insulating layer to improve the electrical insulation performance of the pressure strip, thereby further enhancing the reliability of the battery device.

[0021] Secondly, embodiments of this application also provide an electrical device, which includes a battery device as provided in any of the foregoing embodiments, the battery device being used to provide electrical energy.

[0022] Thirdly, embodiments of this application also provide an energy storage device, which includes a battery device as provided in any of the foregoing embodiments, the battery device being used to store electrical energy.

[0023] 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

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0026] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0027] Figure 3 An exploded view of the three-dimensional structure of a single battery cell provided in some embodiments of this application;

[0028] Figure 4 This is an exploded perspective view of the battery device provided in some embodiments of this application;

[0029] Figure 5 This is a schematic diagram of the structure of the pressure bar in the battery device provided in some embodiments of this application;

[0030] Figure 6 This is a schematic diagram of the battery device provided in some embodiments of this application after removing the upper casing;

[0031] Figure 7 for Figure 6 Enlarged view of part A of the battery device shown;

[0032] Figure 8 for Figure 6 A cross-sectional view along line BB in the battery device shown;

[0033] Figure 9 for Figure 8 Enlarged view of part D in the battery device shown;

[0034] Figure 10 for Figure 6 A cross-sectional view along line CC of the battery device shown;

[0035] Figure 11 for Figure 10 Enlarged view of part E in the battery device shown.

[0036] Explanation of reference numerals in the attached drawings: 1000, vehicle; 200, controller; 300, motor;

[0037] 100. Battery assembly; 10. Battery pack; 11. Battery cell; 111. Casing; 1111. Shell; 1112. Top cover; 112. Electrode assembly; 113. Adapter piece; 114. Electrode terminal; 115. Pressure relief component; 20. Battery box; 21. Lower box; 211. Base; 212. Frame; 2121. First wall; 2122. Second wall; 22. Upper box; 30. Pressure strip; 31. Insulating sheet; 32. Metal sheet; 321. Locking hole;

[0038] X, first direction; Y, second direction; 101, receiving cavity; 102, connector; 103, exhaust passage; 104, notch. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] Furthermore, where the term "and / or" appears, "and / or" merely describes 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, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship. Where the terms "first" and "second" appear, these terms are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0045] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0046] In some related designs, to accommodate high-energy battery devices and strengthen the structural strength of the expansion beams within the "large cells" to withstand greater expansion forces, pressure strips are typically added between the expansion beams after the battery cells are assembled into the casing. This further reinforces the structural strength of the lower casing. However, these pressure strips usually employ locking steel strips, which increases the material, insulation, and locking costs of the strips. Furthermore, the high density of the locking steel strips significantly adds weight to the entire battery device, thereby reducing its energy density and impacting the user experience.

[0047] Based on the above considerations, a battery device is designed. By setting a pressure strip including an insulating sheet arranged along a first direction and metal sheets connected to both ends of the insulating sheet, the pressure strip is connected between the two first walls of the frame through the metal sheets. This adapts to the expansion force generated by the battery device with a large energy storage capacity during operation, thereby improving the structural stability of the frame. At the same time, the insulating sheet itself can reduce the weight of the pressure strip while meeting the structural strength requirements. Moreover, the insulating sheet has good insulation performance, which reduces the insulation design requirements of the pressure strip and can improve the mass energy density of the battery device.

[0048] The battery devices described in this application can be used, but are not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. The power system of such electrical equipment or energy storage device can be formed using the battery devices described in this application.

[0049] The energy storage device utilizing a battery as a power system in this application embodiment can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage device provided in this application embodiment can be used in any power system that requires energy storage.

[0050] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0051] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet. Each battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage device.

[0052] In this application, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. For the sake of brevity, the following embodiments all use electric vehicles as examples.

[0053] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0054] 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.

[0055] Figure 2 A schematic diagram of the structure of a battery device 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 100 provided in the embodiments of this application may include one or more battery packs 10 for providing voltage and capacity. The battery pack 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via a busbar.

[0056] like Figure 2As shown, the battery device 100 is specifically a battery pack, which includes a battery case 20 and one or more battery packs 10, with the battery packs 10 housed within the battery case 20. The battery case 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The battery case 20 can be made of alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0057] The battery pack 10 can be a battery module, which consists of multiple battery cells 11 arranged and fixed to form an independent module. As an example, the battery pack 10 can be a battery module, which can be housed in the battery box 20 by fixing the battery module into the battery box 20. Alternatively, the battery pack 10 can be housed in the battery box 20 by directly fixing multiple battery cells 11 into the battery box 20.

[0058] The battery box 20 may include a lower box 21 and an upper box 22. The lower box 21 and the upper box 22 are fastened together to form a closed space inside the battery box 20 to house the battery pack 10. Here, "closed" means covered or closed, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the individual battery cells 11.

[0059] In some embodiments, the battery box 20 may be part of the vehicle's chassis structure. For example, a portion of the battery box 20 may be at least a part of the vehicle's floor, or a portion of the battery box 20 may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0060] The battery cell 11 mentioned in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0061] The battery cell 11 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells, etc., and this application has no particular limitation.

[0062] Figure 3 This is an exploded three-dimensional structural diagram of a battery cell provided in some embodiments of this application. For example... Figure 3 As shown, the battery cell 11 includes one or more electrode assemblies 112 and a housing 111. The housing 111 may include a shell 1111 and a top cover 1112. Multiple walls of the shell 1111 form a cavity for accommodating the electrode assemblies 112. The shape of the shell 1111 depends on the combined shape of the one or more electrode assemblies 112. For example, the shell 1111 may be a hollow cuboid, cube, or regular polyhedron, and one face of the shell 1111 may have an opening to allow the one or more electrode assemblies 112 to be placed inside the shell 1111. The shell 1111 is filled with an electrolyte, such as an electrolyte solution.

[0063] The battery cell 11 may also include two electrode terminals 114, which can be disposed on a top cover 1112. The top cover 1112 is typically flat, and the two electrode terminals 114 are fixed to the flat surface of the top cover 1112, which are respectively a positive electrode terminal and a negative electrode terminal. Each electrode terminal 114 is provided with a corresponding adapter piece 113, which is located between the top cover 1112 and the electrode assembly 112, for electrically connecting the electrode assembly 112 and the electrode terminal 114. In this battery cell 11, depending on actual usage requirements, the electrode assembly 112 can be configured as a single unit or multiple units, and multiple independent electrode assemblies 112 are disposed within the battery cell 11.

[0064] like Figures 1 to 11 As shown, this application provides a battery device 100, which includes a plurality of battery cells 11, a lower housing 21, and a pressure strip 30. The lower housing 21 has a receiving cavity 101 and includes a base 211 and a frame 212 surrounding the base 211. The frame 212 includes two first walls 2121 arranged opposite each other along a first direction X. The plurality of battery cells 11 are received in the receiving cavity 101 and arranged between the two first walls 2121 along the first direction X. The pressure strip 30 is used to press the battery cells 11 onto the base and includes an insulating sheet 31 arranged along the first direction X and metal sheets 32 connected to both ends of the insulating sheet 31. The insulating sheet 31 is pressed onto the side of the battery cell 11 away from the base 211, and the two metal sheets 32 are respectively connected to the two first walls 2121.

[0065] The battery device 100 includes a plurality of battery cells 11. In a possible implementation, the plurality of battery cells 11 are connected in series, in parallel or in a mixed manner to form a battery pack 10. The battery device 100 may include a plurality of battery packs 10. Alternatively, in some embodiments, the plurality of battery cells 11 may be set to be independent of each other and connected by a plate to transmit electrical energy.

[0066] The lower housing 21 is the main structure of the battery device 100 for storing multiple battery cells 11. The lower housing 21 has a receiving cavity 101 and includes a base 211 and a frame 212. The frame 212 is an annular structure with openings at both ends. The base 211 covers one opening of the frame 212 and, together with the frame 212 (and the upper housing 22), forms the receiving cavity 101 for accommodating multiple battery cells 11 (or battery pack 10).

[0067] It is understood that the base 211 mainly serves to support multiple battery cells 11, and the frame 212 is used to provide protection for the battery cells 11 in the receiving cavity 101 around the periphery and sides of the battery box 20. In these embodiments of the present application, the base 211 and the frame 212 can be detachably connected by means of snap-fit ​​connection, slot connection, or connector (screw, bolt, stud, etc.); or, in some embodiments of the present application, the base 211 and the frame 212 can be fixedly connected by adhesive, welding, or even integral molding.

[0068] The frame 212 is set around the base 211, which means that the frame 212 is set as a ring structure along the outer contour of the base 211 and is set around the periphery of the base 211 along the outer contour of the base 211.

[0069] The frame 212 includes two first walls 2121 arranged opposite each other along a first direction X. This means the first walls 2121 are a pair of wall structures (or beam structures) arranged opposite each other in a ring-shaped frame 212. It is understood that in these embodiments of this application, the ring-shaped structure of the frame 212 may be, but is not limited to, a rectangular ring, a hexagonal ring, or an octagonal ring. This application only describes the frame 212 as a rectangular ring. In these embodiments of this application, the frame 212 also includes two second walls 2122 located at both ends of the first walls 2121 and connecting the two first walls 2121. The first walls 2121 and the second walls 2122 together form a rectangular ring.

[0070] Multiple battery cells 11 are housed in a housing cavity 101 to provide a stable and relatively enclosed working environment for the multiple battery cells 11, thereby reducing the risk of external environment affecting the operation of the battery cells 11.

[0071] Multiple battery cells 11 are arranged between two first walls 2121 along the first direction X. This means that the first direction X is the direction in which multiple battery cells 11 are arranged to form a battery pack 10. That is, multiple battery cells 11 are arranged sequentially along the first direction X to form a battery pack 10. In these embodiments of the present application, the number of battery packs 10 may be, but is not limited to, one, two or three. In embodiments where the number of battery packs 10 is greater than one, each battery cell 11 in each battery pack 10 is arranged between the first walls 2121 along the first direction X.

[0072] In these embodiments of this application, the first wall 2121 can be configured as an expansion beam in the frame 212 to absorb the expansion force generated by the battery device 100 during operation. That is, the relative orientation of the two large surfaces of the battery cell 11 can be set as the first direction X. In a single battery pack 10, multiple battery cells 11 are arranged sequentially between the two first walls 2121 with their large surfaces in contact. In this way, during the operation of the battery device 100, the multiple battery cells 11 generate a large expansion force in the first direction X, which is transmitted to the two first walls 2121 in the frame 212 that are positioned opposite each other along the first direction X. The two first walls 2121, acting as expansion beams, absorb the expansion force generated by the battery device 100 during operation, maintaining the overall structure of the battery box 20 without excessive changes, thus preserving the structural integrity and reliability of the battery device 100.

[0073] The first wall 2121 can be an extruded aluminum profile structure, and its two ends are connected to the second wall 2122 by welding. At the same time, in order to reduce the cracking failure of the weld between the first wall 2121 and the second wall 2122 under the action of expansion force, a reinforcing beam structure can be set at the position of the first wall 2121 away from the receiving cavity 101, thereby providing support for the first wall 2121 and reducing the risk of the first wall 2121 cracking under the action of expansion force.

[0074] The pressure strip 30 is used to press the battery cell 11 onto the base 211 to improve the stability of the battery cell 11 in the receiving cavity 101. Exemplarily, in some embodiments, it can be set at one end of the frame 212 away from the base 211 to further improve the structural strength of the frame 212 and offset the impact of the expansion force on the structure of the frame 212.

[0075] The pressure strip 30 includes an insulating sheet 31 disposed along the first direction X and a metal sheet 32 ​​connected to both ends of the insulating sheet 31. This means that the pressure strip 30 is composed of two parts. At least part of the insulating sheet 31 is a strip-shaped body extending in a straight line, which is the main structure of the pressure strip 30 and is used to press the battery cell 11 together with the base 211 at the end of each battery cell 11 away from the base 211. At the same time, it can also be used to enhance the structural stability between the two first walls 2121. The metal sheet 32 ​​is used to lock and fix the insulating sheet 31 to the two first walls 2121 at both ends.

[0076] In these embodiments of the present application, the insulating sheet 31 has a structure with good tensile strength and structural stability. At the same time, the insulating sheet 31 can also be configured to have good insulation performance to improve the insulation and protection performance of the pressure strip 30.

[0077] For example, the insulating sheet 31 can be a composite material formed by fibers and resin. The fiber material can be, but is not limited to, aramid fibers, glass fibers, ultra-high molecular weight polyethylene fibers, etc., and the fiber structure can be, but is not limited to, continuous fibers, long fibers, short fibers, or plain weave, twill weave, satin weave, axial weave, etc., woven from fibers. The resin can be, but is not limited to, thermosetting resins such as epoxy resin, polyurethane, unsaturated resin, phenolic resin, etc., or thermoplastic resins such as polypropylene, polyethylene, polyester resin, or polyamide.

[0078] The insulating sheet 31 is pressed onto the side of the battery cell 11 away from the base 211, so that the insulation of the insulating sheet 31 can pass through the battery compartment area of ​​the battery device 100. This can improve the insulation performance of the pressure strip 30 and reduce the risk of short circuit in the battery device 100, while improving the structural stability of the battery cell 11 and the structural stability of the frame 212.

[0079] Metal sheet 32 ​​can be, but is not limited to, stainless steel sheet or titanium alloy sheet or other alloy sheet.

[0080] In these embodiments of this application, by setting the middle part of the pressure strip 30 to be an insulating sheet 31 and the two ends to be metal sheets 32, the material properties of the insulating sheet 31 can be used to reduce the weight of the pressure strip 30 itself while obtaining a good insulation effect, which is beneficial to improving the energy density of the battery device 100 and improving the insulation performance of the battery device 100. At the same time, setting the two ends of the pressure strip 30 to be metal sheets 32 can be used to improve the locking strength of the pressure strip 30, so as to adapt to the structure of the battery device 100 with a higher energy density.

[0081] The connection between the metal sheet 32 ​​and the insulating sheet 31, and the connection between the two metal sheets 32 and the two first walls 2121, can be, but is not limited to, a detachable connection method such as a snap-fit, a slot, or a connector; or, the metal sheet 32 ​​and the insulating sheet 31 can be fixedly connected by means of adhesive bonding, injection molding, etc.

[0082] According to the battery device 100 provided in the embodiments of this application, by setting the pressure strip 30 including an insulating sheet 31 disposed along the first direction X and a metal sheet 32 ​​connected to both ends of the insulating sheet 31, the pressure strip 30 is connected between the two first walls 2121 of the frame 212 through the metal sheet 32, so as to adapt to the expansion force generated by the battery device 100 with a large energy storage capacity during operation and improve the structural stability of the frame 212; at the same time, the insulating sheet 31 can reduce the weight of the pressure strip 30 while meeting the structural strength requirements, and the insulating sheet 31 has good insulation performance, which reduces the insulation design requirements of the pressure strip 30 and can improve the mass energy density of the battery device 100.

[0083] In some embodiments, the metal sheet 32 ​​is detachably connected to the first wall 2121.

[0084] In some embodiments of this application, a first buckle (not shown) may be provided on the metal sheet 32, and a second buckle (not shown) that matches the first buckle may be provided on the first wall 2121. During the assembly of the battery device 100, the metal sheet 32 ​​and the first wall 2121 are detachably connected through the first buckle and the second buckle.

[0085] Alternatively, in some embodiments, a locking block can be provided on the metal sheet 32, and a slot matching the locking block can be provided on the first wall 2121. During the assembly of the battery device 100, the metal sheet 32 ​​and the first wall 2121 can be detachably connected by locking the locking block on the metal sheet 32 ​​into the slot on the first wall 2121.

[0086] This setup is beneficial for improving the assembly and disassembly speed of the pressure strip 30. On the one hand, it helps to improve the efficiency of the battery device 100 during production. On the other hand, it can also improve the efficiency of maintenance and parts replacement when the battery device 100 malfunctions and needs to be replaced or repaired.

[0087] In some embodiments, the metal sheet 32 ​​is provided with a plurality of locking holes 321 arranged sequentially at intervals along the second direction Y. The metal sheet 32 ​​is connected to the first wall 2121 by a connector 102 passing through the locking holes 321. The second direction Y intersects with the first direction X.

[0088] The locking hole 321 is a structure on the metal sheet 32 ​​for connecting with the first wall 2121. In these embodiments of the present application, the metal sheet 32 ​​is locked and fastened to the first wall 2121 by passing the connector 102 sequentially through the locking hole 321 and the first wall 2121. The connector 102 may be, but is not limited to, a bolt, screw or stud.

[0089] On the metal sheet 32, a plurality of locking holes 321 are arranged sequentially at intervals along the second direction Y, so that the metal sheet 32 ​​is connected to the first wall 2121 through a plurality of locking points, thereby improving the connection strength between the metal sheet 32 ​​and the first wall 2121.

[0090] In these embodiments of the present application, the second direction Y is parallel to the setting direction of the first wall 2121 in order to improve the uniformity of the installation structure when each locking hole 321 is connected to the first wall 2121 through the connector 102.

[0091] In some embodiments, in the second direction Y, the minimum spacing between adjacent locking holes 321 is ≥5mm.

[0092] The minimum spacing between adjacent locking holes 321 refers to the distance between the tangents (which are parallel) at the closest points between adjacent locking holes 321. The purpose of this setting is to improve the structural strength of the metal sheet 32 ​​itself and reduce the risk of damage to the structure of the metal sheet 32 ​​due to excessively small spacing between the locking holes 321.

[0093] For example, in these embodiments of the present application, the minimum spacing between adjacent locking holes 321 may be, but is not limited to, 8 mm, 10 mm, 12 mm or 15 mm.

[0094] In some embodiments, the battery cell 11 includes a housing 111 and an electrode assembly 112, the electrode assembly 112 being housed within the housing 111, and the housing 111 including an electrode terminal 114 and a pressure relief member 115; the orthographic projection of the pressure strip 30 onto the base 211 is misaligned with the orthographic projection of the electrode terminal 114 and the pressure relief member 115 onto the base 211.

[0095] In the battery cell 11, the electrode assembly 112 is the component in which the electrochemical reaction actually occurs. The electrode assembly 112 is housed in the housing 111 and immersed in the electrolyte. The battery cell 11 is charged and discharged by the movement of electrons between the positive and negative electrodes. The housing 111 is used to provide a stable and relatively sealed working environment for the electrode assembly 112 so that the electrode assembly 112 can work in a stable environment.

[0096] The housing 111 includes electrode terminals 114 and pressure relief components 115. The electrode terminals 114 are used to connect the electrode assembly 112 to external electrical equipment or charging equipment, and are the electrode lead-out structures of the electrode assembly 112. The pressure relief components 115 are protective structures for the battery cell 11 under extreme operating conditions. They are designed to trigger a "fusible link" when the internal pressure of the battery cell 11 is too high, connecting the internal space of the housing 111 to the outside, thereby quickly venting the pressurized gas inside the housing 111 to the outside, so as to reduce the risk of a larger thermal runaway event.

[0097] The misalignment between the projection of the pressure strip 30 onto the base 211 and the projection of the electrode terminal 114 and the pressure relief component 115 onto the base 211 refers to the fact that when the pressure strip 30 is assembled to the lower housing 21, it usually comes into contact with or is connected to the top cover 1112 in the outer casing 111. The electrode terminal 114 and the pressure relief component 115 are also usually located at the top cover 1112 of the outer casing 111. Therefore, when assembling the pressure strip 30, it is necessary to control the misalignment between the pressure strip 30 and the electrode terminal 114 and the pressure relief component 115 to reduce the risk of the pressure strip 30 blocking the pressure relief component 115 and to reduce the risk of the pressure strip 30 contacting the electrode terminal 114 and causing conductivity, thereby further improving the reliability of the battery device 100.

[0098] The outer casing 111 includes a top cover 1112 and a housing 1111 connected together, forming a space for accommodating the electrode assembly 112. In some embodiments of this application, the top cover 1112 may include a central recess (not shown) and shoulders (not shown) on both sides along the width direction of the battery cell 11. The electrode terminals 114 and the pressure relief member 115 extend from the top cover 1112 to the outside corresponding to the recess, and the surface of the electrode terminals 114 facing away from the housing 1111 is lower than the surface of the shoulders facing away from the housing 1111. In this case, the pressure strip 30 projects onto the base 211 the shoulders of the battery cell 11. The projection overlaps, that is, the pressure strip 30 matches the shoulder of the top cover 1112 in the battery cell 11. This arrangement can further protect the electrode terminal 114 and the pressure relief member 115 by utilizing the recess on the top cover 1112. At the same time, in the battery device 100, the recess also provides a certain pressure relief space for each battery cell 11 in the receiving cavity 101, so that when the internal pressure of the battery cell 11 increases, it can release pressure into the receiving cavity 101, further improving the reliability of the battery device 100.

[0099] In some embodiments, the insulating sheet 31 is bonded to the housing 111. This further strengthens the structural strength between the pressure strip 30 and the battery cell 11, which is beneficial to improving the overall structural strength and main frequency of the battery device 100 system.

[0100] In these embodiments of the present application, the insulating sheet 31 and the outer shell 111 may be bonded together, but not limited to, by polyurethane structural adhesive, acrylic structural adhesive, epoxy structural adhesive or silicone structural adhesive.

[0101] In some embodiments, a plurality of battery cells 11 form a row of battery packs 10 along the first direction X, and the multiple rows of battery packs 10 are arranged along the second direction Y; the pressure strip 30 presses against two adjacent rows of battery packs 10 at both ends along the second direction Y, and the second direction Y intersects with the first direction X.

[0102] In these embodiments of the present application, multiple battery cells 11 are arranged sequentially along the second direction Y in the form of multiple rows of battery packs 10. In this case, a single pressure strip 30 can be set to press the two ends of the adjacent rows of battery packs 10 respectively along the second direction Y. In this way, a single pressure strip 30 can be used to press the close ends of the two adjacent rows of battery packs 10 together, which helps to reduce the number of pressure strips 30 used, reduce the number of locking points of the pressure strips 30 during assembly, and further improve the production and assembly efficiency of the battery device 100.

[0103] For example, in some embodiments of this application, multiple battery cells 11 are arranged sequentially along a first direction X to form three battery packs 10. The three battery packs 10 are arranged sequentially along a second direction Y and housed in a receiving cavity 101. Along the second direction Y, the three battery packs 10 are respectively a first battery pack (not labeled), a second battery pack, and a third battery pack. In this case, a pressure strip 30 can be provided on the shoulder of the first battery pack (away from the second battery pack), a pressure strip 30 on the shoulder of the first battery pack and the second battery pack, a pressure strip 30 on the shoulder of the second battery pack and the third battery pack, and a pressure strip 30 on the shoulder of the third battery pack (away from the second battery pack). In this way, the three battery packs 10 are locked and fixed by these four pressure strips 30, reducing the number of locking points between the pressure strips 30 and the first wall 2121, which is beneficial to improving the production and assembly efficiency of the battery device 100.

[0104] In some embodiments, the battery device 100 further includes an upper housing 22, which is connected to the lower housing 21 and is disposed at one end of the frame 212 away from the base 211. The upper housing 22 and the lower housing 21 together form a receiving cavity 101. The upper housing 22 abuts against the pressure strip 30, and the two together with the battery pack 10 and the first wall 2121 form an exhaust channel 103.

[0105] The battery device 100 also includes an upper housing 22, meaning that the battery box 20 in the battery device 100 also includes an upper housing 22, and the upper housing 22 and the lower housing 21 cooperate to form the receiving cavity 101 of the battery device 100.

[0106] The upper housing 22 is connected to the lower housing 21 and is located at the end of the frame 212 opposite to the base 211. The connection between the upper housing 22 and the lower housing 21 can be achieved by welding, riveting, or other methods to achieve a fixed connection; or, in some embodiments, it can be achieved by snap-fit ​​connection, sliding groove connection, or connection by connectors (screws, bolts), or other methods to achieve a detachable connection. At the same time, the upper housing 22 covers the open end of the lower housing 21 (the end opposite to the base 211) to cooperate with the lower housing 21 to form the receiving cavity 101.

[0107] The upper housing 22 abuts against the pressure strip 30, and together with the battery pack 10 and the first wall 2121, they form an exhaust channel 103. This means that after the upper housing 22 is connected to the lower housing 21, the surface of the upper housing 22 near the lower housing 21 abuts against the pressure strip 30. In each battery pack 10, the upper housing 22, the pressure strip 30, the recessed portion of the battery cell 11 (correspondingly equipped with a pressure relief component), and the two first walls 2121 at both ends along the first direction X together form the exhaust channel 103. In this way, when a battery cell 11 in a battery pack 10 experiences thermal runaway, the pressure relief component of that battery cell 11 activates, venting the high-temperature gas from the battery cell 11 into the exhaust channel 103. This gas can then be quickly depressurized outside the receiving cavity 101 through the exhaust channel 103, thereby reducing the risk of escalating thermal runaway.

[0108] In some embodiments of this application, there may be no connecting structure between the upper housing 22 and the pressure strip 30. In this case, the upper housing 22 and the pressure strip 30 are engaged by abutting each other after assembly, so as to improve the convenience of disassembling the upper housing 22 for maintenance or replacement.

[0109] In some embodiments, the first wall 2121 is provided with a plurality of notches 104 at one end away from the base 211, and the projection of a notch 104 along the first direction X at least partially overlaps with the projection of an exhaust channel 103 along the first direction X.

[0110] The notch 104 is designed to be compatible with the exhaust passage 103, allowing the exhaust passage 103 to communicate with the outside through the notch 104, so as to quickly discharge the gas in the exhaust passage 103 to the outside. It is understood that the number of notches 104 should be compatible with the number of exhaust passages 103, that is, in the first direction X, one or two notches 104 are provided at both ends of an exhaust passage 103.

[0111] The projection of a notch 104 along the first direction X at least partially overlaps with the projection of an exhaust channel 103 along the first direction X, that is, the notch 104 and the exhaust channel 103 are connected so that when a battery cell 11 in the battery pack 10 experiences thermal runaway, the pressure relief component in the battery cell 11 works and releases the high temperature and high pressure gas in the battery cell 11 into the exhaust channel 103, and then guides it through the exhaust channel 103 to the notch 104, and finally discharges it to the outside through the notch 104.

[0112] In these embodiments of the present application, in order to improve the exhaust flow of the exhaust passage 103, the projection of the notch 104 along the first direction X can be set to completely overlap with the exhaust passage 103; even in some embodiments, the projection of the exhaust passage 103 in the first direction X can be set to fall within the notch 104, so as to further improve the efficiency of the exhaust passage 103 in discharging gas through the notch 104.

[0113] In some embodiments, the size of each notch 104 in the second direction Y is ≥20mm.

[0114] The dimensions of each notch 104 in the second direction Y refer to the width of the notch 104. In these embodiments of the present application, by setting the width of each notch 104 to be greater than or equal to 20mm, the size of the connection between the exhaust channel 103 and the outside is further increased, thereby improving the efficiency of gas discharge through the exhaust channel 103.

[0115] For example, in these embodiments of the present application, the dimensions of each notch 104 in the second direction Y may be set to 25mm, 30mm, 35mm or 40mm.

[0116] In some embodiments, the upper housing 22 is connected to the pressure strip 30. This further enhances the structural consistency between the upper housing 22 and the pressure strip 30, which helps to improve the independence between each exhaust channel 103, reduce the risk of high temperatures generated by thermal runaway being transmitted between different battery packs 10, and help to reduce the risk of thermal runaway escalation.

[0117] In some embodiments, the upper housing 22 and the pressure strip 30 can be connected by a snap-fit ​​structure, Velcro, or even detachable butyl hot melt adhesive to further enhance the structural consistency between the pressure strip 30 and the upper housing 22. This arrangement also helps reduce the risk of assembly or abnormal noise problems due to out-of-tolerance contours after the upper housing 22 and lower housing 21 are assembled, especially when the upper housing 22 is relatively thin. Simultaneously, this detachable connection between the upper housing 22 and the pressure strip 30 allows them to remain detachable, facilitating subsequent maintenance or replacement of the internal components of the battery device 100. This increases the independence of different exhaust channels 103 while maintaining the maintainability of the battery device 100.

[0118] In some embodiments, the insulating sheet 31 is bonded to the upper housing 22.

[0119] This can further improve the tightness of the connection between the insulating sheet 31 and the upper housing 22, further improve the structural independence between different exhaust channels 103, and further improve the overall structural strength of the battery device 100.

[0120] In some embodiments, along the second direction Y, the width of the metal sheet 32 ​​is less than the width of the insulating sheet 31, and the width of the metal sheet 32 ​​along the second direction Y is ≥10mm, and the second direction Y intersects with the first direction X.

[0121] In other words, in the pressure strip 30, the width of the metal sheet 32 ​​in the second direction Y is smaller than the width of the insulating sheet 31 in the second direction Y. In this way, the insulating sheet 31 can provide a certain limit for the metal sheet 32, which helps to reduce the risk of the metal sheet 32 ​​contacting the electrode terminals or plates in the two rows of battery packs 10 on both sides in the second direction Y, thereby further improving the reliability of the battery device 100.

[0122] The width of the metal sheet 32 ​​along the second direction Y is ≥10mm, which is intended to improve the connection strength between the metal sheet 32 ​​and the first wall 2121 (the larger the width of the metal sheet 32, the more locking points can be set).

[0123] For example, the width dimension of the metal sheet 32 ​​along the second direction Y can be, but is not limited to, 11mm, 12mm, 13mm, 14mm, or 15mm.

[0124] In some embodiments, the orthographic projection of the metal sheet 32 ​​onto the base 211 at least partially overlaps with the orthographic projection of the insulating sheet 31 onto the base 211, and the metal sheet 32 ​​and the insulating sheet 31 are bonded together.

[0125] In these embodiments of the present application, by setting an adhesive between the metal sheet 32 ​​and the insulating sheet 31, the connection structure between the metal sheet 32 ​​and the insulating sheet 31 can be simplified (no need to set screws, nuts or groove structures), which is beneficial to thinning the design while ensuring the structural strength of the pressure strip 30.

[0126] In these embodiments of the present application, the metal sheet 32 ​​and the insulating sheet 31 may be bonded together, but not limited to, by polyurethane structural adhesive, acrylic structural adhesive, epoxy structural adhesive or silicone structural adhesive.

[0127] In some embodiments, in the first direction X, the length of the metal sheet 32 ​​is ≥30mm, and the adhesive area between the metal sheet 32 ​​and the insulating sheet 31 is ≥2500mm². 2 .

[0128] The length of the metal sheet 32 ​​is related to the size of the connection area between it and the insulating sheet 31. It can be understood that the larger the length of the metal sheet 32 ​​in the first direction X, the larger the connection area between the metal sheet 32 ​​and the insulating sheet 31 can be.

[0129] In these embodiments of this application, the length of the metal sheet 32 ​​in the first direction X is set to be greater than or equal to 30 mm, and the adhesive area between the metal sheet 32 ​​and the insulating sheet 31 is ≥2500 mm². 2 To further improve the insulation performance of the battery device 100, while increasing the connection area between the metal sheet 32 ​​and the insulating sheet 31, the extent to which the metal sheet 32 ​​extends into the battery compartment should be minimized.

[0130] Exemplary examples, in these embodiments of this application, the length of the metal sheet 32 ​​in the first direction X can be set to 35mm, 40mm, 45mm, or 50mm; the adhesive area between the metal sheet 32 ​​and the insulating sheet 31 is 3000mm². 2 3500mm 2 4000mm 2 4500mm 2 Or 5000mm 2 .

[0131] In some embodiments, the outer surface of the metal sheet 32 ​​is coated with an insulating layer (not shown) to further improve the electrical insulation performance of the pressure strip 30.

[0132] For example, the insulating layer can be a polymer coating such as polyethylene or polypropylene, or it can be an epoxy insulating varnish or an organosilicon coating.

[0133] This application also provides an electrical device, which includes a battery device 100 as provided in any of the foregoing embodiments, the battery device 100 being used to provide electrical energy.

[0134] This application also provides an energy storage device, which includes a battery device 100 as provided in any of the foregoing embodiments, the battery device 100 being used to store electrical energy.

[0135] Based on some embodiments of this application, please refer to the following: Figures 1 to 11 This application provides a battery device 100, which includes a plurality of battery cells 11, a lower housing 21, and a pressure strip 30. The lower housing 21 has a receiving cavity 101 and includes a base 211 and a frame 212 surrounding the base 211. The frame 212 includes two first walls 2121 arranged opposite each other along a first direction X. The plurality of battery cells 11 are received in the receiving cavity 101 and arranged between the two first walls 2121 along the first direction X. The pressure strip 30 is disposed at one end of the frame 212 away from the base 211 and includes an insulating sheet 31 arranged along the first direction X and metal sheets 32 connected to both ends of the insulating sheet 31. The two metal sheets 32 are respectively connected to the two first walls 2121.

[0136] In the pressure strip 30, at least a portion of the insulating sheet 31 is a strip extending in a straight line, which is the main structure of the pressure strip 30 and is used to press the battery cell 11 together with the base 211 at the end of each battery cell 11 away from the base 211. At the same time, it can also be used to enhance the structural stability between the two first walls 2121. The metal sheet 32 ​​is used to lock and fix the insulating sheet 31 to the two first walls 2121 at both ends.

[0137] In these embodiments of the present application, the insulating sheet 31 has a structure with good tensile strength and structural stability. At the same time, the insulating sheet 31 can also be configured to have good insulation performance to improve the insulation and protection performance of the pressure strip 30.

[0138] In some embodiments, a plurality of battery cells 11 form a row of battery packs 10 along a first direction X, and the multiple rows of battery packs 10 are arranged along a second direction Y; the pressure strip 30 presses against two adjacent rows of battery packs 10 at both ends along the second direction Y.

[0139] In this way, multiple battery cells 11 are arranged sequentially along the second direction Y in the form of multiple rows of battery packs 10. At this time, a single pressure strip 30 can be set to press the two ends of the adjacent rows of battery packs 10 respectively along the second direction Y. In this way, a single pressure strip 30 can be used to press the close ends of the two adjacent rows of battery packs 10 together, which helps to reduce the number of pressure strips 30 used and reduce the number of locking points of the pressure strips 30 during assembly, further improving the production and assembly efficiency of the battery device 100.

[0140] In the battery device 100, the upper housing 22 and the lower housing 21 together form a receiving cavity 101. At the same time, the upper housing 22 abuts against the pressure strip 30, and the two together with the battery pack 10 and the first wall 2121 form an exhaust channel 103.

[0141] After the upper housing 22 is connected to the lower housing 21, the surface of the upper housing 22 near the lower housing 21 abuts against the pressure strip 30. In each battery pack 10, the upper housing 22, the pressure strip 30, the recessed portion of the battery cell 11 (correspondingly equipped with a pressure relief component), and the two first walls 2121 at both ends along the first direction X together form an exhaust channel 103. In this way, when a battery cell 11 in a battery pack 10 experiences thermal runaway, the pressure relief component of that battery cell 11 operates, venting the high-temperature gas in the battery cell 11 into the exhaust channel 103. The gas can then be quickly depressurized outside the receiving cavity 101 through the exhaust channel 103, thereby reducing the risk of escalating thermal runaway.

[0142] The first wall 2121 has a plurality of notches 104 at one end away from the base 211. The projection of a notch 104 along the first direction X at least partially overlaps with the projection of an exhaust channel 103 along the first direction X.

[0143] The notch 104 is designed to be compatible with the exhaust passage 103, allowing the exhaust passage 103 to communicate with the outside through the notch 104, so as to quickly discharge the gas in the exhaust passage 103 to the outside. It is understood that the number of notches 104 should be compatible with the number of exhaust passages 103, that is, in the first direction X, one or two notches 104 are provided at both ends of an exhaust passage 103.

[0144] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0145] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery device, characterized in that, include: Battery cell; The lower housing has a receiving cavity and includes a base and a frame surrounding the base. The frame includes two first walls arranged opposite each other along a first direction. A plurality of battery cells are received in the receiving cavity and arranged between the two first walls along the first direction. A pressure bar is used to press the battery cell onto the base; The pressure strip includes an insulating sheet arranged along the first direction and metal sheets connected to both ends of the insulating sheet. The insulating sheet is pressed against the side of the battery cell away from the base, and the two metal sheets are respectively connected to the two first walls.

2. The battery device according to claim 1, characterized in that, The metal sheet is detachably connected to the first wall.

3. The battery device according to claim 2, characterized in that, The metal sheet is provided with a plurality of locking holes arranged at intervals along the second direction. The metal sheet is connected to the first wall through a connector passing through the locking holes. The second direction intersects the first direction.

4. The battery device according to claim 3, characterized in that, In the second direction, the minimum distance between adjacent locking holes is ≥5mm.

5. The battery device according to claim 1, characterized in that, The battery cell includes a housing and an electrode assembly, the electrode assembly being housed within the housing, and the housing including electrode terminals and a pressure relief component; The projection of the pressure strip onto the base is misaligned with the projection of the electrode terminal and the pressure relief component onto the base.

6. The battery device according to claim 5, characterized in that, The insulating sheet is bonded to the outer shell.

7. The battery device according to claim 5, characterized in that, Along the first direction, a plurality of battery cells form a battery pack, and the plurality of battery packs are arranged along the second direction; The pressure strip presses against the two adjacent rows of battery packs at both ends along the second direction, and the second direction intersects with the first direction.

8. The battery device according to claim 7, characterized in that, The battery device also includes: The upper housing is connected to the lower housing and is located at one end of the frame away from the base. The upper housing and the lower housing together form the receiving cavity. The upper housing abuts against the pressure strip, and together with the battery pack and the first wall, they form an exhaust channel.

9. The battery device according to claim 8, characterized in that, The first wall has a plurality of notches at one end away from the base, and the projection of one of the notches along the first direction at least partially overlaps with the projection of one of the exhaust channels along the first direction.

10. The battery device according to claim 9, characterized in that, The dimensions of each of the notches in the second direction are ≥20mm.

11. The battery device according to claim 8, characterized in that, The upper housing is connected to the pressure strip.

12. The battery device according to claim 11, characterized in that, The insulating sheet is bonded to the upper housing.

13. The battery device according to any one of claims 1 to 12, characterized in that, Along the second direction, the width of the metal sheet is less than the width of the insulating sheet, and the width of the metal sheet along the second direction is ≥10mm, and the second direction intersects with the first direction.

14. The battery device according to any one of claims 1 to 12, characterized in that, The orthographic projection of the metal sheet onto the base at least partially overlaps with the orthographic projection of the insulating sheet onto the base, and the metal sheet and the insulating sheet are bonded together.

15. The battery device according to claim 14, characterized in that, In the first direction, the length of the metal sheet is ≥30mm, and the adhesive area between the metal sheet and the insulating sheet is ≥2500mm². 2 .

16. The battery device according to any one of claims 1 to 12, characterized in that, The outer surface of the metal sheet is coated with an insulating layer.

17. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 16, the battery device being used to provide electrical energy.

18. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1 to 16, the battery device being used to store electrical energy.

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