Battery device and electric device

Abstract

This application relates to the field of battery technology, providing a battery device and an electrical device. The battery device includes a housing, at least two beams, a battery cell, a pressure strip structure, and a sampling plate. The at least two beams are disposed opposite each other within the housing along a first direction. The battery cell is disposed within the housing and between the two beams. The battery cell includes a casing, a first terminal post, and a second terminal post. The casing has a first end along a second direction, and the first and second terminal posts are disposed at the first end, with the first and second directions intersecting. The pressure strip structure is disposed at the first end and between the first and second terminal posts, with at least one end of the pressure strip structure connected to a beam. The sampling plate is disposed at the first end, and the pressure strip structure is disposed between the first end and the sampling plate. This application can improve the internal space utilization of the battery device, thereby contributing to an increase in the energy density of the battery device.

Description

Technical Field

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

[0002] Existing battery devices contain many components, which occupy space in the arrangement of individual battery cells, restricting the layout of individual battery cells and thus affecting the energy density of the entire battery device. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of this application is to provide a battery device and an electrical device, which aims to solve the problem of low space utilization of existing battery devices.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows: In a first aspect, embodiments of this application provide a battery device, including: Box; At least two beams are arranged opposite each other within the box body along a first direction; A battery cell is disposed inside a box and located between two beams. The battery cell includes a shell, a first terminal post and a second terminal post. The shell has a first end post along a second direction. The first terminal post and the second terminal post are disposed at the first end post. The first direction intersects with the second direction. A pressure strip structure is provided at the first end and located between the first pole post and the second pole post, and at least one end of the pressure strip structure is connected to the beam body; A sampling plate is located at the first end, and a pressure strip structure is located between the first end and the sampling plate.

[0005] In the above technical solution, by setting the pressure strip structure between the first end of the battery cell and the sampling plate, located below the sampling plate and in the gap area between the poles, and connecting it to the beam inside the box, the space at the bottom of the sampling plate is fully utilized while suppressing the expansion and deformation of the battery cell during use. This avoids occupying additional space for battery cell arrangement, improves the space utilization rate inside the battery device, and thus facilitates the arrangement of more battery cells and increases the energy density of the battery device.

[0006] In some embodiments, the two ends of the pressure strip structure are respectively connected to two beams.

[0007] In the above technical solution, the anti-expansion effect can be improved by connecting the two ends of the pressure strip structure to the two beams respectively.

[0008] In some embodiments, the strip structure includes a strip body and a reinforcing layer, at least one end of the strip body is connected to the beam, and at least a portion of the surface of the strip body is provided with a reinforcing layer.

[0009] In the above technical solution, by setting a reinforcing layer on the surface of the pressure strip body, the mechanical strength and deformation resistance of the pressure strip structure are improved, and the risk of breakage caused by excessive expansion force of the battery cell is reduced. In addition, the entire pressure strip structure is arranged in the space between the pole posts, avoiding the additional occupation of battery cell arrangement space, thus taking into account both structural reliability and space utilization.

[0010] In some embodiments, the reinforcing layer is a covering layer that covers the entire surface of the strip body.

[0011] In the above technical solution, by setting the reinforcing layer as a covering layer and setting it on the entire outer surface of the pressure strip body, the overall strength of the pressure strip structure can be effectively improved and the risk of breakage can be reduced.

[0012] In some embodiments, the reinforcing layer and the pressure strip body are integrally formed.

[0013] In the above technical solution, by setting the reinforcing layer and the pressure strip body as an integral molding structure, the connection is tight and reliable, reducing the risk of delamination failure, thereby further improving the overall strength and reliability of the pressure strip structure and reducing the risk of breakage.

[0014] In some embodiments, the body of the pressure strip is a metal body.

[0015] In the above technical solution, the pressure strip body is made of metal, which improves the mechanical strength and durability of the pressure strip structure and reduces the risk of breakage caused by excessive expansion force of battery cells.

[0016] In some embodiments, the reinforcing layer is an insulating reinforcing layer.

[0017] In the above technical solution, by setting an insulating reinforcing layer on the pressure strip body, the overall mechanical strength and resistance to expansion and deformation of the pressure strip structure are improved, as well as its insulation performance, which is conducive to improving the reliability of the battery device.

[0018] In some embodiments, the battery cell includes a first pressure relief mechanism, which is disposed at a first end and located between a first electrode post and a second electrode post. On a projection plane perpendicular to the second direction, the orthographic projection of the pressure strip structure is offset from the orthographic projection of the first pressure relief mechanism.

[0019] In the above technical solution, the first pressure relief mechanism is used to discharge the internal gas of the battery cell. By setting the pressure bar structure and the first pressure relief mechanism in a staggered manner, the space between the poles is fully utilized while reducing the obstruction of the pressure bar structure to the first pressure relief mechanism, thereby ensuring that the battery cell can release internal gas under abnormal operating conditions and improving thermal runaway protection capability and reliability.

[0020] In some embodiments, the battery device includes a separator plate disposed between a first end and a sampling plate. The separator plate has a first through hole and a second through hole. A first electrode post passes through the first through hole, a second electrode post passes through the second through hole, and a pressure strip structure is connected to the separator plate.

[0021] In the above technical solution, by setting an isolation plate with through holes for the terminal posts in the battery device, not only is the positioning and installation of the isolation plate and the reliable electrical connection between the sampling plate and the terminal posts achieved, but the isolation plate also isolates the sampling plate, improving the electrical insulation performance between the sampling plate and the casing and other structures of the battery cell below. Furthermore, the pressure strip structure is integrated and fixed to the isolation plate, enhancing the structural stability and making full use of the space between the terminal posts and below the sampling plate, thereby improving space utilization and structural compactness.

[0022] In some embodiments, the pressure strip structure is disposed on the side of the isolation plate facing away from the sampling plate.

[0023] In the above technical solution, by setting the pressure strip structure on the side of the isolation plate facing away from the sampling plate, the isolation plate isolates the pressure strip structure from the sampling plate, reducing the mechanical interference or electrical risks caused to the sampling plate by phenomena such as breakage and vibration of the pressure strip structure, thereby improving the sampling reliability.

[0024] In some embodiments, the pressure strip structure and the partition plate are integrally formed.

[0025] In the above technical solution, by designing the pressure strip structure and the isolation plate as an integral molding structure, not only is the assembly process simplified, but the strength and stability of the overall structure are also improved, and the warping and shaking of the pressure strip structure during use are suppressed, thereby reducing the risk of interference to the sampling signal.

[0026] In some embodiments, the battery cell includes a first pressure relief mechanism, which is disposed at a first end and located between a first electrode post and a second electrode post. The separator is provided with a first exhaust channel, which corresponds to the first pressure relief mechanism.

[0027] In the above technical solution, by setting a first exhaust channel corresponding to the first pressure relief mechanism on the isolation plate, it is ensured that the pressure relief gas can be discharged smoothly, avoiding obstruction of the exhaust path due to the isolation plate covering. Furthermore, the first exhaust channel is integrated into the isolation plate, which improves the structural compactness and thus helps to improve the energy density of the battery device.

[0028] In some embodiments, the first exhaust channel extends along a first direction, at least one beam has a second exhaust channel inside, the box has an exhaust hole, and the first exhaust channel is connected to the exhaust hole via the second exhaust channel.

[0029] In the above technical solution, by setting a first exhaust channel extending along a first direction on the isolation plate and sequentially connecting it with the second exhaust channel inside the beam structure and the exhaust hole of the box, a directional exhaust channel is formed from the first pressure relief mechanism of the battery cell, the first exhaust channel of the isolation plate, the second exhaust channel of the beam to the exhaust hole of the box. This ensures that the pressure relief gas can be quickly and reliably discharged to the outside of the box when thermal runaway is triggered, reducing the residue inside the box, thereby improving the thermal runaway prevention and control capability and reducing the risk of damage to internal sampling plates, battery cells and other components. In addition, by integrating the exhaust channel into the internal space of the beam, the combination of support and exhaust functions is achieved without increasing the additional volume, improving the space utilization, structural compactness and overall reliability of the battery device.

[0030] In some embodiments, the beam extends along a third direction, and at least one end of the beam along the third direction is connected to at least one side wall of the box along the third direction. The side wall is provided with vent holes, and the first direction, the second direction and the third direction intersect each other.

[0031] In the above technical solution, by setting exhaust holes on the side wall of the box and using the second exhaust channel in the beam to discharge the gas, an efficient exhaust path is formed that avoids the obstruction of the top structure of the battery cell (such as the isolation plate, sampling plate, etc.), which reduces the risk of depressurized gas remaining inside the box and ensures that the gas released by the battery cell under abnormal operating conditions can be quickly discharged from the side to the outside of the box, thereby improving the thermal runaway prevention and control capability.

[0032] In some embodiments, the battery device includes a second pressure relief mechanism disposed at a vent.

[0033] In the above technical solution, a second pressure relief mechanism is set at the exhaust port. When the pressure of the gas to be relieved reaches a preset threshold, it is opened to achieve rapid release. Under normal working conditions or low pressure conditions, it remains closed to maintain the sealing of the box.

[0034] In some embodiments, the first exhaust channel and the pressure strip structure are arranged side by side along a third direction on the side of the isolation plate facing away from the sampling plate, and the first direction, the second direction and the third direction intersect each other.

[0035] In the above technical solution, by arranging the first exhaust channel and the pressure strip structure side by side on the side of the isolation plate facing away from the sampling plate, the space between the first and second poles of the battery cell is fully utilized. The structure is compact and the space utilization rate is improved, which is conducive to improving the energy density of the battery device.

[0036] In some embodiments, the isolation plate includes a first wall and a second wall, a pressure strip structure, the first wall and the second wall are connected in sequence, the pressure strip structure and the second wall are disposed on the first end to enclose a first exhaust channel on the first end, and on a projection plane perpendicular to the second direction, the orthographic projection of the first exhaust channel at least partially coincides with the orthographic projection of the first pressure relief mechanism.

[0037] In the above technical solution, by utilizing the structure of the isolation plate itself to form the first exhaust flow channel, there is no need to add an extra exhaust guide component, which simplifies the overall structure and improves the space utilization rate; and by making the orthographic projection of the first exhaust flow channel coincide with the orthographic projection of the first pressure relief mechanism, it is ensured that the pressure relief gas can enter the first exhaust flow channel, thereby realizing external discharge and improving the reliability of exhaust.

[0038] Secondly, embodiments of this application also provide an electrical device, including: the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0039] 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

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the vehicle structure provided in an embodiment of this application; Figure 2 This is an exploded view of the battery device provided in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of a single battery cell provided in an embodiment of this application; Figure 4 This is an assembly diagram of the pressure strip structure provided in the embodiments of this application; Figure 5 A cross-sectional view of the pressure strip structure provided in the embodiments of this application; Figure 6 This is an exploded view of the internal structure of the battery device provided in the embodiments of this application; Figure 7 A schematic diagram of the bottom structure of the isolation plate provided in an embodiment of this application; Figure 8This is a cross-sectional view of the structural assembly of the isolation plate provided in an embodiment of this application.

[0042] The following are the labeling elements in the figure: 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor; 101. Housing; 1011. First housing; 1012. Second housing; 1013. Exhaust vent; 102. Battery cell; 1021. Casing; 10211. First end; 1022. First terminal post; 1023. Second pole post; 1024. First pressure relief mechanism; 103. Beam; 105. Pressure strip structure; 1051. Pressure strip body; 1052, Reinforcing layer; 106, Screw; 107, Sampling plate; 1071, Sampling terminal; 108. Electrical connector; 109. Isolation plate; 1091. First through hole; 1092. Second through hole; 1093. First exhaust channel; 1094. First wall; 1095. Second wall; 1096. Third wall; 1097. Fourth wall; 110. Second exhaust channel; 1101. Second opening structure; 111. Third through hole. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0046] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0047] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0048] 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.

[0049] 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.

[0050] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two groups).

[0051] In the description of the embodiments of this application, the technical terms "center", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing 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.

[0052] 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.

[0053] In battery devices, structural components such as beams and pressure strips are typically installed inside the battery unit to effectively suppress the mechanical stress generated by the expansion of individual battery cells during charging and discharging. However, pressure strips are usually placed at the shoulders between battery cells, requiring a certain amount of shoulder space to be reserved for each cell. This occupies space in the arrangement of battery cells, restricts the compact layout of battery cells, and consequently limits the improvement of the energy density of the entire battery device.

[0054] Based on this, this application provides a battery device with an optimized pressure strip structure layout. By setting the pressure strip structure below the sampling plate and in the gap area between the electrode posts, the idle space at the bottom of the sampling plate is fully utilized, avoiding additional occupation of battery cell arrangement space, improving the internal space utilization of the battery device, thereby facilitating the arrangement of more battery cells and increasing the energy density of the battery device.

[0055] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices 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, etc.

[0056] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0057] Reference Figure 1 As shown, 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, and the battery device 100 can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, the battery device 100 can serve as the operating power source for vehicle 1000. 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 vehicle 1000 during starting, navigation, and driving.

[0058] In some embodiments, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Reference Figure 2As shown, the battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells 102, which are connected in series, parallel, or mixed connections via a busbar.

[0060] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 102.

[0061] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 102 into an independent module. As an example, the battery module can be formed by bundling multiple battery cells 102 together with cable ties.

[0062] In some embodiments, the battery device may be a battery pack, which includes a housing 101 and one or more battery cell assemblies housed in the housing 101.

[0063] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 101 by fixing the battery module in the housing 101.

[0064] As an example, the battery cell assembly can also be housed in the housing 101 by directly fixing multiple battery cells 102 to the housing 101.

[0065] As an example, the housing 101 may include a first housing 1011 and a second housing 1012. The first housing 1011 and the second housing 1012 are fastened together to form a closed space inside the housing 101 to house the battery cell assembly. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 1011 may be a top cover or a bottom plate.

[0066] As an example, the housing 101 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 101 forms an enclosed space to accommodate the battery cell assembly.

[0067] In some embodiments, the housing 101 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 101 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 101 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0068] In this embodiment, the battery cell 102 can be a secondary battery, which refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 102 can be flat, cuboid, or other shapes.

[0069] The battery cell 102 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.

[0070] Battery cell 102 refers to the smallest unit that makes up battery device 100. For example... Figure 3 As shown, the battery cell 102 may include a housing 1021, a first terminal 1022, and a second terminal 1023. The housing 1021 may be a steel housing, an aluminum housing, a plastic housing (such as a polypropylene housing), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film, etc. One of the first terminal 1022 and the second terminal 1023 is a positive terminal, and the other is a negative terminal. They may be disposed on the top of the housing 1021 for outputting or inputting electrical energy into the battery cell 102.

[0071] In some embodiments, such as Figure 3 As shown, the battery cell 102 may further include a first pressure relief mechanism 1024, which is disposed on the top of the housing 1021 and located in the middle between the first terminal 1022 and the second terminal 1023. The first pressure relief mechanism 1024 is used to release the internal gas of the battery cell 102.

[0072] As an example, when the internal pressure or temperature of the battery cell 102 reaches a predetermined threshold, the first pressure relief mechanism 1024 performs an action or a weak structure (such as a diaphragm) in the first pressure relief mechanism 1024 is damaged, thereby forming an opening or channel for the internal pressure or temperature to be released. This threshold can be designed according to actual needs.

[0073] As an example, the first pressure relief mechanism 1024 can be integrally formed with the housing 1021.

[0074] As an example, the first pressure relief mechanism 1024 can also be separately configured and connected to the housing 1021.

[0075] As an example, the first pressure relief mechanism 1024 can be an explosion-proof valve.

[0076] In some embodiments, when the housing 1021 is a non-sealed structure, the first pressure relief mechanism 1024 can be configured as a through-hole structure to discharge gas inside the battery cell 102.

[0077] In the embodiments of this application, such as Figure 2As shown, the first direction X refers to the arrangement direction of the multiple battery cells 102, and the second direction Y refers to the height direction of the battery cell 102. The intersection of the first direction X and the second direction Y means that the angle between the lines containing the first direction X and the second direction Y is greater than 0° and less than or equal to 90°, which can be 10°, 50°, 80°, 90°, or any value within a range of two of the above values. The third direction Z refers to the extension direction of the beam 103. The first direction X, the second direction Y, and the third direction Z intersect each other pairwise; for example, the angle between any two directions can be 90°. It can be understood that the first direction X, the second direction Y, and the third direction Z here refer to the thickness, height, and length directions of a regular-shaped (such as rectangular) battery cell 102.

[0078] In some embodiments, refer to Figures 2 to 4 , Figure 6 As shown, this application provides a battery device 100, including: a housing 101, at least two beams 103, a battery cell 102, a pressure strip structure 105, and a sampling plate 107. At least two beams 103 are arranged opposite each other in the housing 101 along the first direction X; a battery cell 102 is disposed in the housing 101 and located between the two beams 103. The battery cell 102 includes a shell 1021, a first terminal 1022 and a second terminal 1023. The shell 1021 has a first end 10211 along the second direction Y. The first terminal 1022 and the second terminal 1023 are disposed at the first end 10211; a pressure strip structure 105 is disposed at the first end 10211 and located between the first terminal 1022 and the second terminal 1023. At least one end of the pressure strip structure 105 is connected to the beam 103; a sampling plate 107 is disposed at the first end 10211 and the pressure strip structure 105 is disposed between the first end 10211 and the sampling plate 107.

[0079] The housing 101 serves as the external support and protective structure for the entire battery device 100, housing internal components such as the battery cells 102, beams 103, and pressure strip structures 105. The housing 101 can be made of materials with a certain strength, such as stainless steel or aluminum alloy.

[0080] At least two beams 103 are arranged opposite each other in the first direction X inside the housing 101 and can extend in the third direction Z to clamp the battery cell 102 to resist the stress generated by the expansion of the battery cell 102 during charging and discharging, and reduce the risk of deformation.

[0081] Optionally, the beam 103 can be made of a material with a certain strength, such as stainless steel or aluminum alloy.

[0082] As an example, the beam 103 and the box 101 can be an integrally formed structure, which improves the overall structural strength and connection reliability, thereby enhancing the resistance to expansion forces.

[0083] Multiple battery cells 102 can be provided, and multiple battery cells 102 are arranged side by side along the first direction X to form a battery cell assembly, which is disposed between two beams 103. As an example, Figure 2 As shown, two battery cell assemblies are installed inside the housing 101, and the two battery cell assemblies are arranged side by side along the third direction Z. In the battery cell assembly, the large surfaces (the surfaces with the largest area) of two adjacent battery cells 102 are arranged in close contact with each other.

[0084] In the battery cell 102, the outer casing 1021 can be made of steel, aluminum, or plastic (such as polypropylene). The first terminal 1022 and the second terminal 1023 are located at the first end 10211 (usually the top) of the outer casing 1021 along the second direction Y (height direction). The first terminal 1022 and the second terminal 1023 can be arranged at intervals along the third direction Z for electrical connection.

[0085] At least one end of the pressure strip structure 105 is connected to the beam 103 and forms a constraint structure along the first direction X, spanning the first end 10211 of the battery cell 102, further suppressing the expansion and deformation of the battery cell 102 during use. Furthermore, the pressure strip structure 105 is positioned below the sampling plate 107, in the gap between the electrode posts, making full use of the space at the bottom of the sampling plate 107, avoiding additional space occupation for the battery cell 102 arrangement, improving the internal space utilization of the battery device 100, thereby facilitating the arrangement of more battery cells 102 and increasing the energy density of the battery device 100.

[0086] Optionally, the sampling board 107 may include a flexible circuit board (FPC), a printed circuit board (PCB), etc.

[0087] As an example, the sampling board 107 is provided with sampling terminals 1071 on both sides along the third direction Z. The sampling terminals 1071 may include voltage sampling terminals, temperature sampling terminals, etc., for collecting voltage, temperature and other signals of the battery cell 102 respectively.

[0088] As an example, the battery device 100 includes a plurality of battery cells 102 arranged side by side along a first direction X. The battery device 100 also includes an electrical connector 108, which can be used to connect the terminals of two adjacent battery cells 102 to achieve electrical connection. The electrical connector 108 can be a battery pack.

[0089] As an example, sampling terminal 1071 is electrically connected to electrical connector 108, so that sampling board 107 is attached above the two terminals of battery cell 102.

[0090] In some embodiments, refer to Figure 4 As shown, the two ends of the pressure strip structure 105 are respectively connected to the two beams 103 to improve the anti-expansion effect.

[0091] As an example, such as Figure 4 and Figure 7 As shown, the two ends of the pressure strip structure 105 can be connected to the top of the two beams 103 one by one by fasteners such as screws 106.

[0092] As an example, one end of the pressure strip structure 105 is connected to the beam 103, and the other end is connected to the first end 10211 of the battery cell 102.

[0093] In some embodiments, refer to Figure 4 and Figure 5 As shown, the pressure strip structure 105 includes a pressure strip body 1051 and a reinforcing layer 1052. At least one end of the pressure strip body 1051 is connected to the beam body 103, and at least a portion of the surface of the pressure strip body 1051 is provided with the reinforcing layer 1052.

[0094] As an example, the pressure strip body 1051 spans the gap between the two terminals of the battery cell 102, and both ends of the pressure strip body 1051 are connected to two beams 103 inside the housing 101 to constrain the expansion of the battery cell 102. To cope with the large expansion force that the battery cell 102 may generate under long-term cycling or high-temperature conditions, at least part of the surface of the pressure strip body 1051 (such as the upper and lower surfaces, left and right sides, etc.) is provided with a reinforcing layer 1052 to improve the mechanical strength and deformation resistance of the pressure strip structure 105 and reduce the risk of breakage due to excessive expansion force of the battery cell 102.

[0095] Optionally, the reinforcing layer 1052 can be made of metal materials, engineering plastics, etc. Metal materials include aluminum alloys, stainless steel, etc. Engineering plastics include polyamides, polycarbonates, etc.

[0096] Therefore, this embodiment of the application reduces the risk of breakage of a single-material pressure strip under high stress conditions by setting the pressure strip structure 105 as a composite structure including the pressure strip body 1051 and the reinforcing layer 1052. Furthermore, the entire pressure strip structure 105 is arranged in the space between the electrode posts, avoiding additional space occupation for the battery cell arrangement 102, thus balancing structural reliability and space utilization.

[0097] In some embodiments, refer to Figure 5 As shown, the reinforcing layer 1052 is a covering layer, which covers the entire surface of the pressure strip body 1051, that is, the pressure strip body 1051 is disposed inside the covering layer.

[0098] In this embodiment of the application, by setting the reinforcing layer 1052 as a covering layer and covering the entire outer surface of the pressure strip body 1051, the overall strength and fatigue resistance of the pressure strip structure 105 can be effectively improved, and the risk of fracture can be reduced.

[0099] In some embodiments, the reinforcing layer 1052 and the pressure strip body 1051 are integrally formed.

[0100] As an example, the reinforcing layer 1052 is made of plastic and the pressure strip body 1051 is made of steel. The plastic can be coated onto the surface of the steel strip using an injection molding process to form an integrally molded pressure strip structure 105. The connection is tight and reliable, reducing the risk of delamination failure, thereby further improving the overall strength and reliability of the pressure strip structure 105 and reducing the risk of breakage.

[0101] In some embodiments, the pressure strip body 1051 is a metal body.

[0102] The pressure strip body 1051 can be made of metal materials such as aluminum alloy and stainless steel, which improves the mechanical strength and durability of the pressure strip structure 105 and reduces the risk of breakage due to excessive expansion force of the battery cell 102.

[0103] In some embodiments, the reinforcing layer 1052 is an insulating reinforcing layer.

[0104] The reinforcing layer 1052 can be made of materials with insulating properties, such as engineering plastics or epoxy resin. It can be firmly wrapped around the surface of the metal strip body 1051 by integral molding. In addition to improving the overall mechanical strength and resistance to expansion and deformation of the strip structure 105, it also improves its insulation performance, thereby helping to improve the reliability of the battery device 100.

[0105] In some embodiments, the pressure strip structure 105 includes a metal body and an insulating reinforcement layer, which not only enhances its own mechanical reliability but also reduces the risk of electrical contact between the metal body and the sampling plate 107, reducing signal interference or short circuit hazards, thereby ensuring stable acquisition of parameters such as voltage and temperature and improving sampling reliability.

[0106] In some embodiments, refer to Figure 3 and Figure 4 As shown, the battery cell 102 includes a first pressure relief mechanism 1024, which is located at the first end 10211 and between the first pole post 1022 and the second pole post 1023. On the projection plane perpendicular to the second direction Y, the orthographic projection of the pressure strip structure 105 is offset from the orthographic projection of the first pressure relief mechanism 1024.

[0107] In this embodiment, the pressure strip structure 105 and the first pressure relief mechanism 1024 are misaligned. On the one hand, the pressure strip structure 105 can make full use of the space between the poles to improve space utilization. On the other hand, by avoiding the first pressure relief mechanism 1024 on the projection surface, the risk of the pressure strip structure 105 blocking the gas discharge during the pressure relief process is reduced, thereby ensuring that the battery cell 102 can release internal gas under abnormal operating conditions, improving thermal runaway protection capability and reliability.

[0108] In some embodiments, refer to Figure 6 and Figure 7 As shown, the battery device 100 includes an isolation plate 109, which is disposed between the first end 10211 and the sampling plate 107. The isolation plate 109 has a first through hole 1091 and a second through hole 1092. A first electrode post 1022 passes through the first through hole 1091, and a second electrode post 1023 passes through the second through hole 1092. A pressure strip structure 105 is connected to the isolation plate 109.

[0109] The separator 109 can be made of materials with insulating properties, such as engineering plastics or epoxy resin. The separator 109 isolates the sampling plate 107, improving the electrical insulation between the sampling plate 107 and the metal casing and other structures of the battery cell 102 below.

[0110] Furthermore, the isolation plate 109 has through holes corresponding to the terminals of the battery cell 102, and the terminals pass through the through holes so that the electrical connector 108 can be connected to the terminals. The sampling terminal 1071 of the sampling plate 107 is electrically connected to the electrical connector 108, thereby realizing the positioning and installation of the isolation plate 109 and the reliable electrical connection between the sampling plate 107 and the terminals.

[0111] In addition, the pressure strip structure 105 is integrated and fixed to the isolation plate 109, which enhances the structural stability and makes full use of the space between the poles and under the sampling plate 107, thereby improving the space utilization and structural compactness.

[0112] In some embodiments, refer to Figures 6 to 8 As shown, the pressure strip structure 105 is located on the side of the isolation plate 109 facing away from the sampling plate 107.

[0113] In this embodiment, the pressure strip structure 105 is disposed on the side of the isolation plate 109 facing away from the sampling plate 107, located at the bottom of the isolation plate 109, while the sampling plate 107 is arranged on the top of the isolation plate 109. The isolation plate 109 can isolate the pressure strip structure 105 from the sampling plate 107, reducing the mechanical interference or electrical risks to the sampling plate 107 caused by the pressure strip structure 105 due to breakage, vibration, or other phenomena, thereby improving the sampling reliability.

[0114] In some embodiments, refer to Figures 6 to 8As shown, the pressure strip structure 105 and the isolation plate 109 are integrally formed structures.

[0115] For example, the metal body (such as stainless steel or aluminum alloy) of the pressure strip structure 105 can be embedded and encapsulated in a reinforcing layer 1052 made of insulating engineering plastic using an injection molding process. This reinforcing layer 1052 and the isolation plate 109 are molded simultaneously during manufacturing, forming a single integral component. This not only simplifies the assembly process but also improves the overall structural strength and stability. The metal body acts as an internal skeleton, providing high-strength support, while the externally injection-molded insulating material not only achieves electrical isolation but also suppresses warping and wobbling of the metal body through a binding constraint, thereby reducing the risk of interference with the sampling signal.

[0116] In some embodiments, refer to Figure 8 As shown, the battery cell 102 includes a first pressure relief mechanism 1024, which is located at the first end 10211 and between the first terminal post 1022 and the second terminal post 1023. The separator plate 109 is provided with a first exhaust channel 1093, which corresponds to the first pressure relief mechanism 1024.

[0117] Optionally, the first exhaust channel 1093 can be a through hole, a guide channel, or other structures.

[0118] The first exhaust channel 1093 corresponds to the first pressure relief mechanism 1024. This means that on a projection plane perpendicular to the second direction Y, the orthographic projection of the first exhaust channel 1093 and the orthographic projection of the first pressure relief mechanism 1024 at least partially overlap. This ensures that the pressure relief gas discharged through the first pressure relief mechanism 1024 flows into the first exhaust channel 1093, avoiding obstruction of the exhaust path due to the cover of the isolation plate 109. Furthermore, the first exhaust channel 1093 is integrated into the isolation plate 109, improving the structural compactness, which is beneficial to improving the energy density of the battery device 100.

[0119] In some embodiments, refer to Figure 2 , Figure 6 and Figure 8 As shown, the first exhaust channel 1093 extends along the first direction X, and at least one beam 103 has a second exhaust channel 110 inside. The box 101 has an exhaust hole 1013. The first exhaust channel 1093 is connected to the exhaust hole 1013 through the second exhaust channel 110.

[0120] As an example, the beam 103 is provided with a third through hole 111, and the first exhaust channel 1093 is connected to the second exhaust channel 110 through the third through hole 111.

[0121] As an example, the second exhaust channel 110 extends along the second direction Y, and the top and / or bottom of the second exhaust channel 110 are provided with a first opening structure. The top and / or bottom of the housing 101 are provided with an exhaust hole 1013, and the exhaust hole 1013 is connected to the first opening structure.

[0122] As an example, such as Figure 6 As shown, the second exhaust channel 110 extends along the third direction Z. At least one end of the second exhaust channel 110 is provided with a second opening structure 1101. At least one side of the housing 101 is provided with an exhaust hole 1013, and the exhaust hole 1013 is correspondingly connected to the second opening structure 1101.

[0123] This embodiment of the application forms a directional exhaust channel by setting a first exhaust channel 1093 on the isolation plate 109 and sequentially connecting it with the second exhaust channel 110 inside the beam 103 structure and the exhaust hole 1013 of the box, thus forming a directional exhaust channel from the first pressure relief mechanism 1024 of the battery cell 102, the first exhaust channel 1093 of the isolation plate 109, the second exhaust channel 110 of the beam 103 to the exhaust hole 1013 of the box 101. This ensures that the pressure relief gas can be quickly and reliably discharged to the outside of the box 101 when thermal runaway is triggered, reducing the residue inside the box 101, thereby improving the thermal runaway prevention and control capability and reducing the risk of damage to internal components such as the sampling plate 107 and the battery cell 102. In addition, by integrating the exhaust channel into the internal space of the beam 103, the combination of support and exhaust functions is achieved without increasing the additional volume, improving the space utilization, structural compactness and overall reliability of the battery device 100.

[0124] In some embodiments, refer to Figure 2 and Figure 6 As shown, the beam 103 extends along the third direction Z, and at least one end of the beam 103 along the third direction Z is connected to at least one side wall of the box body 101 along the third direction Z. The side wall is provided with an exhaust hole 1013.

[0125] As an example, the beam 103 can be a hollow structure. The beam 103 has a second opening structure 1101 at both ends along the third direction Z, thereby forming a second exhaust channel 110 that extends and penetrates along the third direction Z. Correspondingly, the box 101 has exhaust holes 1013 on both side walls along the third direction Z, and the exhaust holes 1013 are connected to the second opening structure 1101.

[0126] This embodiment of the application provides an exhaust port 1013 on the side wall of the housing 101 and uses the second exhaust channel 110 in the beam 103 to laterally exhaust the gas, forming an efficient exhaust path that avoids the obstruction of the top structure of the battery cell 102 (such as the sampling plate 107, the isolation plate 109, etc.). This reduces the risk of depressurized gas remaining inside the housing 101 and ensures that the gas released by the battery cell 102 under abnormal operating conditions can be quickly discharged from the side to the outside of the housing 101, thereby improving the thermal runaway prevention and control capability.

[0127] In some embodiments, the battery device 100 includes a second pressure relief mechanism disposed at the vent 1013.

[0128] Optionally, the second pressure relief mechanism may include an explosion-proof valve, a pressure relief valve, etc.

[0129] This embodiment of the application provides a second pressure relief mechanism at the exhaust port 1013 on the side wall of the housing 101. When the air pressure inside the housing 101 does not reach a preset threshold, the mechanism remains closed, effectively blocking external water vapor, dust and other pollutants. When the battery cell 102 triggers the first pressure relief mechanism 1024 due to thermal runaway or other reasons and generates high-pressure gas, the gas is conducted to the second pressure relief mechanism through the first exhaust channel 1093 of the isolation plate 109 and the second exhaust channel 110 in the beam. When the pressure exceeds the preset threshold, the second pressure relief mechanism opens, quickly discharging the gas outside the housing 101, thereby improving the reliability of the battery device 100.

[0130] In some embodiments, refer to Figure 8 As shown, the first exhaust channel 1093 and the pressure strip structure 105 are arranged side by side along the third direction Z on the side of the isolation plate 109 facing away from the sampling plate 107.

[0131] In this embodiment, the first exhaust channel 1093 and the pressure strip structure 105 are arranged side by side on the side of the isolation plate 109 facing away from the sampling plate 107 and located at the bottom of the isolation plate 109. This makes full use of the space between the terminals of the battery cell 102, resulting in a compact structure and improved space utilization, which is beneficial to improving the energy density of the battery device 100.

[0132] In some embodiments, refer to Figure 7 and Figure 8 As shown, the isolation plate 109 includes a first wall 1094 and a second wall 1095. The pressure strip structure 105, the first wall 1094 and the second wall 1095 are connected in sequence. The pressure strip structure 105 and the second wall 1095 are disposed on the first end 10211 to enclose the first exhaust channel 1093 on the first end 10211. On the projection plane perpendicular to the second direction Y, the orthographic projection of the first exhaust channel 1093 at least partially coincides with the orthographic projection of the first pressure relief mechanism 1024.

[0133] As an example, the first wall 1094 serves as the top structure of the first exhaust channel 1093, and is disposed opposite to the first end 10211 of the battery cell 102. The pressure strip structure 105 and the second wall 1095 are disposed opposite to each other, serving as the side structure of the first exhaust channel 1093, thereby enclosing the first exhaust channel 1093 extending along the first direction X on the first end 10211 of the battery cell 102. The two ends of the first exhaust channel 1093 are respectively provided with a third opening structure, which is respectively connected to the third through hole 111 of the beam 103 at both ends, thereby realizing the connection between the first exhaust channel 1093 and the second exhaust channel 110.

[0134] In this embodiment, the first exhaust channel 1093 is formed by utilizing the structure of the isolation plate 109 itself, eliminating the need for additional exhaust guide components, thus simplifying the overall structure and improving space utilization. Furthermore, by aligning the orthographic projection of the first exhaust channel 1093 with the orthographic projection of the first pressure relief mechanism 1024, it is ensured that the pressure relief gas can enter the first exhaust channel 1093, thereby achieving external discharge and improving the reliability of exhaust.

[0135] In some embodiments, refer to Figure 7 As shown, the isolation plate 109 also includes a third wall 1096 and a fourth wall 1097. The third wall 1096, the pressure strip structure 105, the first wall 1094, the second wall 1095 and the fourth wall 1097 are connected sequentially along the third direction Z. The third wall 1096 is provided with a first through hole 1091 and the fourth wall 1097 is provided with a second through hole 1092.

[0136] In some embodiments, refer to Figure 6 and Figure 7 As shown, the battery device 100 includes a plurality of battery cell assemblies arranged side by side along a third direction Z, and each battery cell assembly includes a plurality of battery cells 102 arranged side by side along a first direction X. Each battery cell assembly has a separator plate 109 and a sampling plate 107 on its top.

[0137] As an example, such as Figure 6 and Figure 7 As shown, the isolation plate 109 on top of each battery cell assembly is a one-piece molded structure.

[0138] In some embodiments, refer to Figures 6 to 8 As shown, a pressure strip structure 105 spanning the top of each battery cell 102 and a first exhaust channel 1093 are provided on the top of the battery cell assembly. The first exhaust channel 1093 corresponds to the first pressure relief mechanism 1024 of each battery cell 102. The pressure relief gas discharged from each first pressure relief mechanism 1024 can enter the same first exhaust channel 1093 for centralized exhaust, which simplifies the exhaust channel structure.

[0139] In some embodiments, refer to Figures 2 to 8 As shown, this application provides a battery device 100, including: a housing 101, two beams 103, a battery cell assembly, a sampling plate 107, and an isolation plate 109. Two beams 103 are positioned opposite each other within a housing 101. The battery cell assembly includes multiple battery cells 102 located within the housing 101 and between the two beams 103. Each battery cell 102 includes a housing 1021, positive and negative terminals, and an explosion-proof valve located on top of the housing 1021. The explosion-proof valve is positioned between the positive and negative terminals. A separator plate 109 is located on top of the battery cell assembly, and a sampling plate 107 is located on top of the separator plate 109. The separator plate 109 has through holes for the positive and negative terminals to pass through, allowing the terminals of adjacent battery cells 102 to be electrically connected to the sampling plate 107 via a connector. The separator plate 109 is integrally formed with a pressure strip structure 105, which includes a steel strip and a plastic reinforcing layer covering the steel strip. The pressure strip structure 105 is located at the bottom of the separator plate 109. Located between the positive and negative terminals, the pressure strip structure 105 is offset from the explosion-proof valve. The two ends of the pressure strip structure 105 are respectively connected to two beams 103. Furthermore, the isolation plate 109 forms a first exhaust channel 1093 on the top of the battery cell assembly. The first exhaust channel 1093 covers the explosion-proof valve of each battery cell 102. The beam 103 is a hollow structure with openings on both sides to form a second exhaust channel 110 inside. The housing 101 is provided with an exhaust hole 1013 on the side wall corresponding to the second exhaust channel 110. The first exhaust channel 1093 is connected to the exhaust hole 1013 through the second exhaust channel 110, thereby discharging the gas discharged from the explosion-proof valve to the outside of the housing 101 through the first exhaust channel 1093, the second exhaust channel 110, and the exhaust hole 1013.

[0140] In some embodiments, this application also provides an electrical device, including: a battery device 100 of any of the above embodiments, the battery device 100 being used to provide electrical energy.

[0141] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0142] The above are merely preferred embodiments of this application and are not intended to limit the embodiments of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this application should be included within the protection scope of the embodiments of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; At least two beams are disposed opposite to each other within the box body along a first direction; A battery cell is disposed within the housing and located between the two beams. The battery cell includes a housing, a first terminal post, and a second terminal post. The housing has a first end post along a second direction. The first terminal post and the second terminal post are disposed at the first end post. The first direction intersects with the second direction. A pressure strip structure is provided at the first end and located between the first pole post and the second pole post, and at least one end of the pressure strip structure is connected to the beam body; A sampling plate is disposed at the first end, and the pressure strip structure is disposed between the first end and the sampling plate.

2. The battery device according to claim 1, characterized in that, The two ends of the pressure strip structure are respectively connected to the two beams.

3. The battery device according to claim 1, characterized in that, The pressure strip structure includes a pressure strip body and a reinforcing layer. At least one end of the pressure strip body is connected to the beam body, and the reinforcing layer is provided on at least a portion of the surface of the pressure strip body.

4. The battery device according to claim 3, characterized in that, The reinforcing layer is a covering layer, which covers the entire surface of the pressure strip body.

5. The battery device according to claim 3, characterized in that, The reinforcing layer and the pressure strip body are integrally formed.

6. The battery device according to claim 3, characterized in that, The pressure strip body is a metal body, and / or the reinforcing layer is an insulating reinforcing layer.

7. The battery device according to any one of claims 1 to 6, characterized in that, The battery cell includes a first pressure relief mechanism, which is located at the first end and between the first electrode post and the second electrode post. On a projection plane perpendicular to the second direction, the orthographic projection of the pressure strip structure is offset from the orthographic projection of the first pressure relief mechanism.

8. The battery device according to any one of claims 1 to 6, characterized in that, The battery device includes an isolation plate disposed between the first end and the sampling plate. The isolation plate has a first through hole and a second through hole. The first electrode post passes through the first through hole, and the second electrode post passes through the second through hole. The pressure strip structure is connected to the isolation plate.

9. The battery device according to claim 8, characterized in that, The pressure strip structure is located on the side of the isolation plate facing away from the sampling plate.

10. The battery device according to claim 8, characterized in that, The pressure strip structure and the isolation plate are integrally formed.

11. The battery device according to claim 8, characterized in that, The battery cell includes a first pressure relief mechanism, which is located at the first end and between the first electrode and the second electrode. The separator is provided with a first exhaust channel, which corresponds to the first pressure relief mechanism.

12. The battery device according to claim 11, characterized in that, The first exhaust channel extends along the first direction, and at least one of the beams has a second exhaust channel inside. The box has an exhaust hole, and the first exhaust channel is connected to the exhaust hole via the second exhaust channel.

13. The battery device according to claim 12, characterized in that, The beam extends along a third direction, and at least one end of the beam along the third direction is connected to at least one side wall of the box along the third direction. The side wall is provided with the exhaust hole, and the first direction, the second direction and the third direction intersect each other.

14. The battery device of claim 12, wherein, The battery device includes a second pressure relief mechanism, which is located at the vent.

15. The battery device of claim 12, wherein, The first exhaust channel and the pressure strip structure are arranged side by side along a third direction on the side of the isolation plate facing away from the sampling plate, and the first direction, the second direction and the third direction intersect each other.

16. The battery device of claim 15, wherein, The isolation plate includes a first wall and a second wall. The pressure strip structure, the first wall and the second wall are connected in sequence. The pressure strip structure and the second wall are disposed on the first end to enclose the first exhaust channel on the first end. On the projection plane perpendicular to the second direction, the orthographic projection of the first exhaust channel and the orthographic projection of the first pressure relief mechanism at least partially coincide.

17. An electrical device, comprising: include: The battery device according to any one of claims 1 to 16, wherein the battery device is used to provide electrical energy.

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