Battery devices, battery boxes and electrical equipment

Abstract

This application relates to the field of battery technology and provides a battery device, battery box, and electrical equipment that can solve the protection problem of drain valves. The battery device includes a box and a drain mechanism. The box includes a first wall with a through-hole extending along a first direction. The drain mechanism includes a valve body and a movable component. The valve body is installed in the through-hole, and the movable component moves relative to the valve body along the first direction to open or close the through-hole. The movable component has an energy absorption channel, and the extension direction of the energy absorption channel forms an angle with the first direction.

Description

Technical Field

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

[0002] The battery device is equipped with a drain valve, which can drain the liquid accumulated in the battery box. However, in related technologies, the drain valve lacks effective protection and is easily damaged and fails due to external impacts. Utility Model Content

[0003] This application provides a battery device, battery box, and electrical equipment that can absorb external impacts through the collapse deformation of moving parts, effectively improving the service life of the valve body and drainage mechanism.

[0004] The first aspect of this application provides a battery device, including a housing and a draining mechanism. The housing includes a first wall with a through hole extending along a first direction. The draining mechanism includes a valve body and a movable member. The valve body is installed in the through hole, and the movable member moves relative to the valve body along the first direction to open or close the through hole. The movable member has an energy absorption channel, and the extension direction of the energy absorption channel forms an angle with the first direction.

[0005] The battery device provided in this application includes a housing for accommodating individual battery cells. The housing includes a first wall with a liquid-passing hole extending through it in a first direction to allow liquid to drain from the housing. A draining mechanism is provided at the liquid-passing hole, comprising a valve body and a movable component. The valve body is mounted on the liquid-passing hole, and the movable component is oriented opposite to the valve body in the first direction to open or close the liquid-passing hole. When the liquid-passing hole is closed, the draining mechanism isolates both sides of the hole; when the hole is open, liquid is allowed to drain through it. Furthermore, the movable component has an energy-absorbing channel extending at an angle to the first direction, extending to the area of ​​the movable component that is subjected to external impact. Due to the energy-absorbing channel, the movable component can collapse and deform upon impact to absorb impact energy, reducing the transfer of impact energy to the valve body and thus protecting the valve body and reducing the likelihood of it breaking or being damaged by external impact. Compared with related technologies where the valve body is easily damaged by external impacts, the battery device of this application has an energy absorption channel in the moving part of the draining mechanism. The energy absorption channel provides deformation space, and the moving part absorbs external impacts through collapse deformation, effectively improving the service life of the valve body and the draining mechanism.

[0006] In some embodiments of this application, the movable element includes an extension portion that is at least capable of abutting against the valve body in a first direction, and at least a portion of the energy absorption channel is located in the extension portion.

[0007] Here, the moving part is provided with an extension portion, which can at least abut against the valve body in the first direction, so that the extension portion can directly transmit the external impact energy in the first direction to the valve body. At least part of the energy absorption channel is located in the extension portion, and the energy absorption channel effectively blocks the transmission path of the impact energy so as to have a good energy absorption and buffering effect.

[0008] In some embodiments of this application, the movable member further includes a boss portion, an extension portion connected to one side of the boss portion, the boss portion extending along a first direction, and an energy absorption channel extending to the boss portion.

[0009] Here, the movable part includes a boss portion that extends along a first direction, and an extension portion is connected to one side of the boss portion so that the two form an integral structure with good structural strength. The energy absorption channel extends to the boss portion, thereby expanding the energy absorption coverage area. On the one hand, this improves the energy absorption and buffering effect; on the other hand, the energy absorption channel can reduce weight and save materials, which helps to make the drainage mechanism lightweight and save costs.

[0010] In some embodiments of this application, the movable part includes an outer peripheral surface that surrounds the central axis of the movable part; the energy absorption channel includes a first opening that is disposed on the outer peripheral surface.

[0011] Here, the movable part has an outer peripheral surface surrounding its central axis, and the energy absorption channel includes a first opening. The first opening is disposed on the outer peripheral surface. By providing the first opening as a process hole on the outer peripheral surface of the movable part, it is helpful to process and form the energy absorption channel on the movable part, which facilitates processing and manufacturing.

[0012] In some embodiments of this application, the movable part further includes a first surface, which is disposed adjacent to the outer peripheral surface, and a first opening extends to the first surface to form a notch structure.

[0013] Here, the movable part has a first surface adjacent to the outer peripheral surface, and a first opening extends to the first surface and the outer peripheral surface respectively, thereby forming a notch structure on the movable part. On the one hand, the notch structure can avoid other components of the drainage mechanism and reduce the possibility of interference between the movable part and other components; on the other hand, the notch structure can serve as a limiting notch so that the notch structure can provide a limit or guide for the component extending into it.

[0014] In some embodiments of this application, the energy-absorbing channel extends from the outer peripheral surface toward the central axis of the moving part; and / or, the extension direction of the energy-absorbing channel is perpendicular to the first direction.

[0015] Here, the energy-absorbing channel extends from the outer peripheral surface toward the central axis of the moving part, allowing the energy-absorbing channel to extend from the outer edge of the moving part to the central region, thereby increasing the coverage area of ​​the energy-absorbing channel. The extension direction of the energy-absorbing channel is perpendicular to the first direction, which facilitates the processing and shaping of the energy-absorbing channel and also allows the energy-absorbing channel to extend vertically in the first direction with a shorter depth to cover a larger area.

[0016] In some embodiments of this application, at least a portion of the energy absorption channel has a uniformly arranged cross-sectional profile along its extension direction.

[0017] Here, the cross-sectional profile of the energy-absorbing channel is uniformly set, so that the energy-absorbing channel forms an equal diameter structure. On the one hand, this facilitates the processing and shaping of the energy-absorbing channel; on the other hand, the energy-absorbing channel has a similar energy-absorbing effect in different areas of the moving part, and the energy-absorbing buffering effect is more balanced.

[0018] In some embodiments of this application, the movable component has at least two energy-absorbing channels, and the at least two energy-absorbing channels are evenly distributed around the central axis of the movable component.

[0019] Here, the moving part is provided with at least two energy-absorbing channels so that multiple energy-absorbing channels can cover a larger area and improve the energy absorption and buffering effect; at least two energy-absorbing channels are evenly distributed around the central axis of the moving part, and the evenly distributed energy-absorbing channels help to improve the balance of the energy absorption and buffering effect in different areas of the moving part.

[0020] In some embodiments of this application, the battery device further includes a protective cover connected to the first wall, and the protective cover covers the draining mechanism at least along a first direction; a receiving space is provided between the protective cover and the first wall, the receiving space allowing the movable part to move relative to the valve body.

[0021] Here, by adding a protective cover, a primary protection is formed, which can effectively isolate the transmission of external impacts to the drainage mechanism, thereby protecting the drainage mechanism and reducing the possibility of damage and failure of the drainage mechanism.

[0022] In some embodiments of this application, the movable member includes a second surface facing the protective cover in a first direction; the protective cover includes a third surface disposed opposite to the second surface, and a buffer gap is provided between the third surface and the second surface at least when the movable member moves relative to the valve body to close the liquid passage.

[0023] Here, the second surface of the moving part and the third surface of the protective cover are arranged opposite each other to form a buffer gap. The moving part does not contact the protective cover. When the protective cover is deformed by external impact, the buffer gap can provide deformation space, thereby reducing the possibility of impact energy being directly transmitted to the moving part and improving the protective performance of the protective cover.

[0024] In some embodiments of this application, a receiving groove is formed on the side of the protective cover facing the first wall. The receiving groove and the draining mechanism are aligned along the first direction. The receiving groove is used to accommodate part of the draining mechanism.

[0025] Here, a receiving groove is formed on the side of the protective cover facing the first wall. The receiving groove and the draining mechanism are aligned along the first direction. On the one hand, the receiving groove can accommodate the draining mechanism. On the other hand, the receiving groove can conveniently collect the accumulated liquid discharged by the draining mechanism.

[0026] In some embodiments of this application, the protective cover has at least one drain hole; the drain hole is located at a position where the protective cover is provided with a receiving groove; and / or, the drain hole penetrates the protective cover along a first direction.

[0027] Here, the protective cover has at least one drain hole, which helps to drain the accumulated liquid inside the protective cover; the drain hole is located at the position where the protective cover is provided with a receiving tank, so that the accumulated liquid collected in the receiving tank can be discharged through the drain hole; the drain hole penetrates the protective cover along the first direction, and the drain hole and the liquid passage hole extend in the same direction, which improves the continuity of the drainage path and helps to drain the accumulated liquid.

[0028] A second aspect of this application provides a battery box, including a box body and a draining mechanism. The box body includes a first wall with a through hole extending along a first direction. The draining mechanism includes a valve body and a movable member. The valve body is installed in the through hole, and the movable member moves relative to the valve body along the first direction to open or close the through hole. The movable member has an energy absorption channel, and the extension direction of the energy absorption channel has an angle with the first direction.

[0029] The battery box provided in this application has a draining mechanism at the liquid passage hole. The moving part of the draining mechanism has an energy absorption channel, which provides deformation space. The moving part absorbs external impact through collapse deformation, effectively improving the service life of the valve body and the draining mechanism.

[0030] A third aspect of this application provides an electrical device including the battery device of the first aspect; or, the electrical device includes the battery box of the second aspect.

[0031] The electrical equipment provided in this application includes a draining mechanism. The moving parts of the draining mechanism have energy-absorbing channels, which provide deformation space. The moving parts absorb external impacts through collapse deformation, effectively improving the service life of the valve body and the draining mechanism. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0033] 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, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of this application;

[0035] Figure 2 This is an exploded structural diagram of the battery device according to an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of the exploded structure of a single battery cell in the battery device of this application embodiment;

[0037] Figure 4 This is an exploded view of a portion of the draining mechanism in the battery device according to an embodiment of this application;

[0038] Figure 5 This is one of the cross-sectional structural diagrams of the battery device according to an embodiment of this application;

[0039] Figure 6 This is one of the structural schematic diagrams of the moving parts in the battery device according to an embodiment of this application;

[0040] Figure 7 This is one of the top view structural schematic diagrams of the moving parts in the battery device according to an embodiment of this application;

[0041] Figure 8 Examples of embodiments of this application Figure 7 A schematic diagram of the cross-sectional structure along the middle AA line;

[0042] Figure 9 This is a second cross-sectional structural diagram of the battery device according to an embodiment of this application;

[0043] Figure 10 This is a second schematic diagram of the structure of the moving parts in the battery device according to an embodiment of this application;

[0044] Figure 11 This is a second top view of the moving parts in the battery device according to an embodiment of this application;

[0045] Figure 12 Examples of embodiments of this application Figure 11 Schematic diagram of the cross-sectional structure along the middle BB;

[0046] Figure 13 Examples of embodiments of this application Figure 11 A schematic diagram of the cross-sectional structure along the CC line;

[0047] Figure 14This is a schematic diagram of the structure of the first wall and the protective cover in the battery device according to an embodiment of this application;

[0048] Figure 15 This is a schematic diagram of the structure of the protective cover in the battery device according to an embodiment of this application;

[0049] Figure 16 Examples of embodiments of this application Figure 15 Schematic diagram of the cross-sectional structure along the middle DD;

[0050] Figure 17 This is a schematic diagram of the structure of the drain hole in the battery device according to an embodiment of this application.

[0051] Explanation of reference numerals in the attached figures:

[0052] 1-Box body; 11-First wall; 12-First box body section; 13-Second box body section; 14-Receiving cavity; 2-Drainage mechanism; 21-Valve body; 22-Moving part; 221-Energy absorption channel; 2211-First opening; 222-Extension; 2221-Second surface; 223-Boss; 2231-Outer peripheral surface; 2232-First surface; 3-Protective cover; 31-Receiving groove; 311-Third surface; 32-Drainage hole; 4-Battery cell; 41-Shell; 42-Electrode assembly; 43-End cap; 5-Power unit; Z-First direction; L-Central axis; H-Buffer gap. Detailed Implementation

[0053] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0054] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0055] 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.

[0056] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0057] 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.

[0058] 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 are in an "or" relationship.

[0059] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0060] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0061] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0062] The following is a detailed description of this application.

[0063] The battery device is equipped with a drain valve, which can be installed on the bottom protective plate of the battery device. Part of the drain valve structure is exposed on the outside of the bottom protective plate, making it highly susceptible to environmental factors that may cause functional failure. This makes it difficult to meet the performance requirements of the product and lacks effective protection for the drain valve.

[0064] There is room for optimization and improvement in the protection of the drain valve. The existing structure is difficult to meet the protection requirements of the drain valve in harsh scenarios during use. The exposed position (weak area) of the drain valve at the bottom of the battery device is prone to failure, which affects the sealing performance. Damage to the drain valve may cause structural failure due to external impact, leading to an increase in the frequency of after-sales maintenance.

[0065] In some technical solutions, the drain valve of the battery device is installed on the bottom protective plate of the battery device. The drain valve is exposed to the outside of the battery device, lacks bottom protection, is difficult to prevent dust, and the sealing ring is prone to aging, making it highly susceptible to environmental factors that may cause functional failure. The piston of the drain valve is a solid structure, which makes it easy to transmit force and cannot play a role in buffering and absorbing energy. In the ball impact test of the battery device, the valve body is prone to cracking and sealing failure under both moving and stationary ball conditions.

[0066] This application discloses a battery device, a battery box, and an electrical device. The battery box is used to house individual battery cells. A liquid passage hole is provided on the first wall of the box to drain accumulated liquid from the box. A draining mechanism is provided at the liquid passage hole, which includes a valve body and a movable component. The valve body is installed at the liquid passage hole, and the movable component and the valve body can be opposite each other along a first direction to open or close the liquid passage hole. The movable component has an energy-absorbing channel, and the extension direction of the energy-absorbing channel forms an angle with the first direction so that the energy-absorbing channel extends to the area of ​​the movable component that is subjected to external impact. Due to the energy-absorbing channel, the movable component can collapse and deform when subjected to external impact to absorb impact energy, reduce the transmission of impact energy to the valve body, thereby protecting the valve body, reducing the possibility of the valve body breaking and being damaged due to external impact, and effectively improving the service life of the valve body and the draining mechanism.

[0067] Electrical equipment can include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0068] The battery device disclosed in this application can be used in electrical equipment that uses batteries as a power source, or as an energy storage device. The energy storage device includes energy storage containers, energy storage cabinets, etc.

[0069] In the following embodiments, for ease of explanation, an example of an electrical device according to an embodiment of this application is a vehicle.

[0070] Figure 1 The diagram illustrates the structure of a vehicle as provided in some embodiments of this application. The vehicle 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 vehicles, etc. Figure 1 As shown, a battery pack is installed inside the vehicle, which can be located at the bottom, front, or rear of the vehicle. The battery pack can be used to power the vehicle; for example, it can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller controls the battery pack's power supply to the motor, for example, to meet the vehicle's power needs during starting, navigation, and driving.

[0071] In some embodiments of this application, the battery device can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0072] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application. The battery device mentioned in the embodiments of this application may also include one or more battery cell assemblies (not shown in the figure, please refer to the combination of multiple battery cells 4) for providing voltage and capacity. The battery cell assembly may include multiple battery cells 4, which are connected in series, parallel or mixed connection through a busbar.

[0073] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 4.

[0074] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells arranged and fixed to form an independent module.

[0075] As an example, a battery module can be formed by bundling multiple battery cells 4 together with cable ties.

[0076] In some embodiments, as shown in the figure, the battery device can be a battery pack, which includes a housing 1 and one or more battery cell assemblies housed within a cavity.

[0077] As an example, the battery cell assembly can be a battery module, which can be housed within the cavity by fixing the battery module within the cavity.

[0078] As an example, the battery cell assembly can also be housed in the cavity by directly fixing multiple battery cells 4 into the cavity.

[0079] As an example, such as Figure 2 As shown, the housing 1 may include a first housing portion 12 and a second housing portion 13. The first housing portion 12 and the second housing portion 13 are fastened together, forming a closed space, or cavity, inside the housing 1 to house the battery cell assembly. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first housing portion 12 may be a top cover or a bottom plate.

[0080] In some embodiments, the housing 1 may be part of the vehicle's chassis structure. For example, a portion of the housing 1 may be at least a portion of the vehicle's floor, or a portion of the housing 1 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0081] In this embodiment of the application, the battery cell 4 can be a secondary battery, which refers to the battery cell 4 that can be used again after being discharged by recharging to activate the active material.

[0082] The battery cell 4 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.

[0083] Reference Figure 3 The battery cell 4 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include square battery cells, blade-shaped battery cells, and multi-prismatic battery cells. For example, a multi-prismatic battery cell can be a hexagonal prismatic battery cell. There are no particular limitations in the embodiments of this application.

[0084] In some embodiments, the housing 41 includes an end cap 43 and a housing 41, the housing 41 having an opening, and the end cap 43 closing the opening to form a sealed space for accommodating the electrode assembly 42 and substances such as electrolytes. The housing 41 may have one or more openings. The end cap 43 may also be provided one or more times.

[0085] In some embodiments, at least one electrode terminal is provided on the housing 41, and the electrode terminal is electrically connected to the electrode tab. The electrode terminal can be directly connected to the electrode tab, or it can be indirectly connected to the electrode tab through an adapter. The electrode terminal can be provided on the end cap 43 or on the housing 41.

[0086] In some embodiments, a pressure relief mechanism is provided on the housing 41. The pressure relief mechanism is used to release the internal pressure of the battery cell 4.

[0087] A battery cell 4 typically includes an electrode assembly 42. The electrode assembly 42 includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell 4, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator is positioned between the positive and negative electrodes to prevent short circuits while allowing active ions to pass through.

[0088] In some embodiments, electrode assembly 42 further includes an isolator disposed between the positive and negative electrodes.

[0089] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0090] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride, and ceramic.

[0091] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0092] In some embodiments, the battery cell 4 also includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0093] In some embodiments, the electrode assembly 42 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0094] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0095] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0096] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0097] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0098] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0099] In some embodiments, the electrode assembly 42 may be cylindrical, flat, or polygonal in shape.

[0100] In some embodiments, the electrode assembly 42 is provided with tabs that can conduct current from the electrode assembly 42. The tabs include a positive tab and a negative tab.

[0101] Reference Figure 4 , Figure 5 and Figure 6 This application provides a battery device, including a housing 1 and a draining mechanism 2. The housing 1 includes a first wall 11, and the first wall 11 has a liquid passage hole that extends along a first direction Z. The draining mechanism 2 includes a valve body 21 and a movable member 22. The valve body 21 is installed in the liquid passage hole, and the movable member 22 moves relative to the valve body 21 along the first direction Z to open or close the liquid passage hole. The movable member 22 has an energy absorption channel 221, and the extension direction of the energy absorption channel 221 has an angle with the first direction Z.

[0102] In the technical solution of this application embodiment, the housing 1 is used to accommodate the battery cell 4. The housing 1 includes a first wall 11 with a liquid passage hole. The liquid passage hole penetrates the first wall 11 along the first direction Z so that the liquid passage hole can drain the liquid accumulated in the housing 1. A draining mechanism 2 is provided at the liquid passage hole. The draining mechanism 2 includes a valve body 21 and a movable part 22. The valve body 21 is installed at the liquid passage hole, and the movable part 22 is opposite to the valve body 21 along the first direction Z so as to open or close the liquid passage hole. When the liquid passage hole is closed, the draining mechanism 2 isolates the two sides of the liquid passage hole. When the liquid passage hole is open, the liquid is allowed to be discharged through the liquid passage hole.

[0103] Based on this, the movable part 22 is provided with an energy absorption channel 221. The extension direction of the energy absorption channel 221 is at an angle to the first direction Z, so that the energy absorption channel 221 extends to the area of ​​the movable part 22 that is subjected to external impact. Due to the setting of the energy absorption channel 221, the movable part 22 can collapse and deform when subjected to external impact in order to absorb the impact energy and reduce the transmission of impact energy to the valve body 21, thereby protecting the valve body 21 and reducing the possibility of the valve body 21 being broken and damaged due to external impact.

[0104] Compared with related technologies, where the valve body 21 is easily damaged by external impacts, the battery device of this application embodiment has an energy absorption channel 221 in the movable part 22 of the drain mechanism 2. The energy absorption channel 221 provides deformation space, and the movable part 22 absorbs external impacts through collapse deformation, effectively improving the service life of the valve body 21 and the drain mechanism 2, and improving the sealing effectiveness.

[0105] In some examples, the housing 1 has a receiving cavity 14 for accommodating the battery cell 4. The housing 1 can be a split structure or a one-piece structure, and the cross-sectional profile of the housing 1 can be a regular or irregular shape such as a circle, ellipse, triangle, rectangle, trapezoid, or hexagon. For example, the housing 1 is set as a cuboid structure.

[0106] In some examples, the first wall 11 can be the bottom wall, top wall, or side wall of the box 1, etc. Any box wall in the box 1 that requires the drainage mechanism 2 can be the first wall 11. For example, the first wall 11 is the bottom protective plate of the box 1.

[0107] In some examples, the first direction Z has an angle with the extended plane (the surface with the largest area) of the first wall 11. This angle can be acute, obtuse or right. For example, the first direction Z is perpendicular to the first wall 11. In the case that the first wall 11 is a bottom protective plate, the first direction Z can be the height direction of the box 1 so that the accumulated liquid can be discharged from the liquid passage hole in the direction of gravity.

[0108] In some examples, the valve body 21 is mounted on the liquid passage hole, meaning that the valve body 21 is positioned at the liquid passage hole, with at least a portion of the valve body 21 located within the liquid passage hole. The valve body 21 is connected to the first wall 11, and this connection can be achieved through, but is not limited to, snap-fitting, bonding, welding, screwing, or fastener connection. For example, the valve body 21 may have external threads, and the inner wall of the liquid passage hole may have internal threads; alternatively, a nut may be fixed within the liquid passage hole, and the valve body 21 may be detachably connected to the first wall 11 via a screw connection.

[0109] In some examples, the movable member 22 is movably connected to the valve body 21, and the movable connection includes, but is not limited to, a sliding connection or a rotating connection. For example, the valve body 21 has a through hole along the first direction Z, and the movable member 22 is inserted into the through hole along the first direction Z, so that the movable member 22 can move relative to the valve body 21 along the first direction Z.

[0110] In some examples, the movable part 22 moves away from the valve body 21 and toward the outside of the housing 1, forming a gap between the movable part 22 and the valve body 21 that connects the through hole of the valve body 21 and the outside of the first wall 11. The drainage mechanism 2 opens the liquid passage, and the accumulated liquid and other fluids can be discharged through the through hole of the valve body 21. Conversely, the movable part 22 moves toward the inside of the valve body 21 and the housing 1, and the movable part 22 contacts the valve body 21 and closes the gap. The drainage mechanism 2 closes the liquid passage, thereby isolating the receiving cavity 14 relative to the outside of the housing 1.

[0111] In some examples, the drainage mechanism 2 further includes at least one seal positioned where the movable member 22 is disengaged from the valve body 21. For example, the at least one seal includes an inner sealing ring and an outer sealing ring, which are respectively mounted on the valve body 21, coaxially arranged, with the outer sealing ring located outside the inner sealing ring. The inner and outer sealing rings can disengage the movable member 22 to provide a good sealing effect when the liquid passage is closed.

[0112] Reference Figure 6 , Figure 7and Figure 8 In some examples, the movable part 22 has an energy absorption channel 221. The energy absorption channel 221 is a spatial structure. The setting of the energy absorption channel 221 makes the movable part 22 form a hollow structure. The movable part 22 has a space for deformation and collapse. The deformation and collapse of the movable part 22 can effectively absorb external impact energy. The energy absorption channel 221 has channel walls on opposite sides along the first direction Z.

[0113] In some examples, the extension direction of the energy absorption channel 221 can be its length direction, or the extension direction of the energy absorption channel 221 can be the direction of its cross-section changing regularly, where regular change means that the size of the cross-section remains unchanged, gradually increases or gradually decreases.

[0114] In some examples, the extension direction of the energy absorption channel 221 may have an acute, right, or obtuse angle with the first direction Z. For example, the first wall 11 is a bottom protective plate, the liquid passage hole is set perpendicular to the first wall 11, the extension direction of the energy absorption channel 221 is set perpendicular to the first direction Z, and the extension direction of the energy absorption channel 221 is any direction parallel to the first wall 11.

[0115] In some examples, by optimizing the moving parts in the drainage mechanism 2, the design forms an energy-absorbing channel 221 through partial hollowing, so that the moving parts can collapse and absorb energy when subjected to external force (external impact), thereby reducing the force on the valve body 21 in the drainage mechanism 2 and providing protection for the valve body 21.

[0116] Reference Figure 9 and Figure 10 In some embodiments of this application, the movable member 22 includes an extension 222, which is at least capable of abutting against the valve body 21 along the first direction Z, as shown in the reference. Figure 11 , Figure 12 and Figure 13 At least a portion of the energy absorption channel 221 is located in the extension portion 222.

[0117] In the technical solution of this application embodiment, the movable member 22 is provided with an extension portion 222. The extension portion 222 can at least abut against the valve body 21 along the first direction Z, so that the extension portion 222 can directly transmit the external impact energy in the first direction Z to the valve body 21. At least a portion of the energy absorption channel 221 is located in the extension portion 222. The energy absorption channel 221 effectively blocks the transmission path of the impact energy so as to have a good energy absorption and buffering effect.

[0118] In some examples, the extension portion 222 is a structure in the movable member 22 that abuts against the valve body 21. The extension portion 222 has an abutting surface that abuts against the valve body 21 at least along the first direction Z. It should be noted that the extension portion 222 may form one or more abutting surfaces.

[0119] In some examples, the extension 222 is located at the end of the through hole of the valve body 21 near the outside of the first wall 11, and the abutting surface is located on the side of the extension 222 facing the receiving cavity 14. The abutting surface is perpendicular to the first direction Z. The abutting surface can be an annular surface. The abutting surface surrounds the central axis of the valve body 21. The abutting surface can also be located at the position of abutting the sealing element.

[0120] In some examples, the energy absorption channel 221 is at least partially located in the extension portion 222, meaning that it is projected along the first direction Z toward the same projection plane, and the projection of the extension portion 222 can cover at least part of the energy absorption channel 221. The energy absorption channel 221 may be entirely located in the extension portion 222, or the energy absorption channel 221 may be extended to the extension portion 222 by other parts of the movable member 22.

[0121] Reference Figure 8 , Figure 11 and Figure 12 In some embodiments of this application, the movable member 22 further includes a boss portion 223, an extension portion 222 is connected to one side of the boss portion 223, the boss portion 223 extends along the first direction Z, and the energy absorption channel 221 extends to the boss portion 223.

[0122] In the technical solution of this application embodiment, the movable part 22 includes a boss portion 223, which extends along the first direction Z. An extension portion 222 is connected to one side of the boss portion 223 so that the two form an integral structure with good structural strength. The energy absorption channel 221 extends to the boss portion 223, thereby expanding the energy absorption coverage area. On the one hand, it improves the energy absorption buffering effect; on the other hand, the energy absorption channel 221 can reduce weight and save materials, which helps to make the drainage mechanism 2 lightweight and save costs.

[0123] In some examples, the boss portion 223 and the extension portion 222 are arranged sequentially along the first direction Z. The extension portion 222 is located on the side of the boss portion 223 away from the receiving cavity 14. The boss portion 223 is located in the through hole of the valve body 21. The boss portion 223 extends toward the receiving cavity 14 along the first direction Z. The radial dimension of the boss portion 223 can be smaller than the radial dimension of the extension portion 222 so that the extension portion 222 forms an abutment surface.

[0124] In some examples, the energy-absorbing channel 221 extends to the boss portion 223, meaning that at least a portion of the energy-absorbing channel 221 is located on the boss portion 223 and projected onto the same projection plane along the first direction Z. The projection of the boss portion 223 can cover at least a portion of the energy-absorbing channel 221. It should be noted that the portion of the energy-absorbing channel 221 corresponding to the boss portion 223 and the portion corresponding to the extension portion 222 can be interconnected or relatively isolated.

[0125] In some examples, the moving parts can adopt a one-piece structure; for example, the boss 223 and the extension 222 are integrally molded. In other examples, the boss 223 and the extension 222 are separately molded and then connected into one piece by bonding or welding. The one-piece structure combined with partial hollowing forms an energy-absorbing channel 221, which enables the moving parts to absorb energy when subjected to external forces, reducing the stress on the valve body 21 in the drainage mechanism 2.

[0126] Reference Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 13 In some embodiments of this application, the movable member 22 includes an outer peripheral surface 2231, which surrounds the central axis L of the movable member 22; the energy absorption channel 221 includes a first opening 2211, which is disposed on the outer peripheral surface 2231.

[0127] In the technical solution of this application embodiment, the movable part 22 has an outer peripheral surface 2231 surrounding its central axis L. The energy absorption channel 221 includes a first opening 2211, which is disposed on the outer peripheral surface 2231. By providing the first opening 2211 as a process hole on the outer peripheral surface 2231 of the movable part 22, it is helpful to process and form the energy absorption channel 221 on the movable part 22, which is convenient for processing and manufacturing.

[0128] In some examples, the movable part 22 can be a rotating body or a prism structure, and the central axis L of the movable part 22 is set along the first direction Z. For example, the movable part 22, the valve body 21 and the liquid passage are set coaxially, and the central axis L of the three are all parallel to the first direction Z.

[0129] In some examples, the outer peripheral surface 2231 surrounds the central axis L of the movable part 22. The outer peripheral surface 2231 is an annular surface, which can be a circular ring, an elliptical ring, a rectangular ring, or a hexagonal ring, etc.

[0130] In some examples, the movable part 22 may be provided with one or more outer peripheral surfaces 2231. For example, the boss portion 223 and the extension portion 222 may each form an outer peripheral surface 2231. The energy absorption channel 221 may be provided with a first opening 2211 on one or more outer peripheral surfaces 2231. For example, the first opening 2211 is provided on the outer peripheral surface 2231 corresponding to the boss portion 223.

[0131] It should be noted that the first opening 2211 can be used as a process opening so that the energy absorption channel 221 can be formed on the moving part 22 through the first opening 2211. The first opening 2211 can also be used as a pressure relief port to reduce the compressive force on the gas in the energy absorption channel 221 when the moving part 22 collapses and deforms.

[0132] In other embodiments of this application, the energy absorption channel 221 may not have a first opening 2211, the energy absorption channel 221 may be a closed structure, the movable part 22 may be formed by split molding and splicing to form the energy absorption channel 221, or the movable part 22 may be formed by three-dimensional printing or other methods.

[0133] Reference Figure 6 , Figure 7 , Figure 10 , Figure 11 and Figure 13 In some embodiments of this application, the movable member 22 further includes a first surface 2232, which is disposed adjacent to the outer peripheral surface 2231, and the first opening 2211 extends to the first surface 2232 and forms a notch structure.

[0134] In the technical solution of this application embodiment, the movable member 22 has a first surface 2232 adjacent to the outer peripheral surface 2231, and the first opening 2211 extends to the first surface 2232 and the outer peripheral surface 2231 respectively, thereby forming a notch structure on the movable member 22. On the one hand, the notch structure can avoid other components of the drainage mechanism 2 and reduce the possibility of interference between the movable member 22 and other components; on the other hand, the notch structure can serve as a limiting notch so that the notch structure can provide a limiting or guiding function for the component extending into it.

[0135] In some examples, the movable part 22 includes a first surface 2232, which is the surface of an adjacent outer peripheral surface 2231. The first surface 2232 can be the surface of the movable part 22 facing or away from the receiving cavity 14. It is understood that different outer peripheral surfaces 2231 can correspond to the same or different first surfaces 2232.

[0136] In some examples, the boss portion 223 forms a first surface 2232 on the side opposite to the extension portion 222, and the first opening 2211 extends to the first surface 2232, such that the energy absorption channel 221 forms a notch structure at the corner of the first surface 2232 and the outer peripheral surface 2231.

[0137] In some examples, the notch structure serves as an obstacle avoidance notch, allowing it to avoid components or other structures in the drainage mechanism 2; in other examples, the notch structure serves as a limiting structure, with its inner wall providing limiting and guidance for the components of the drainage mechanism 2, thus enhancing the functionality of the notch structure.

[0138] Reference Figure 6 , Figure 8 , Figure 10 , Figure 12 and Figure 13 In some embodiments of this application, the energy absorption channel 221 extends from the outer peripheral surface 2231 toward the central axis L of the movable member 22; and / or, the extension direction of the energy absorption channel 221 is perpendicular to the first direction Z.

[0139] In the technical solution of this application embodiment, the energy absorption channel 221 extends from the outer peripheral surface 2231 toward the central axis L of the movable member 22, so that the energy absorption channel 221 can extend from the outer edge of the movable member 22 to the central region, thereby increasing the coverage area of ​​the energy absorption channel 221; the extension direction of the energy absorption channel 221 is perpendicular to the first direction Z, which facilitates the processing and shaping of the energy absorption channel 221, and also enables the energy absorption channel 221 to extend vertically in the first direction Z with a shorter depth to cover a larger area.

[0140] In some examples, the energy absorption channel 221 extends from the outer peripheral surface 2231 toward the central axis L of the movable member 22, meaning that the extension direction of the energy absorption channel 221 is from the edge of the movable member 22 toward the center, and the extension direction of the energy absorption channel 221 may be parallel to the extension plane of the first wall 11.

[0141] In some examples, the extension direction of the energy absorption channel 221 is perpendicular to the first direction Z, which means that the energy absorption channel 221 extends in any direction in the plane perpendicular to the first direction Z. The extension direction of the energy absorption channel 221 can be a straight line, a curve, a broken line or a spiral.

[0142] In some examples, the extension direction of the energy absorption channel 221 is set to the radial direction of the movable member 22, the energy absorption channel 221 extends from the outer peripheral surface 2231 toward the central axis L of the movable member 22, and the extension direction of the energy absorption channel 221 is perpendicular to the first direction Z.

[0143] Reference Figure 6 , Figure 10 and Figure 11 In some embodiments of this application, at least a portion of the cross-sectional profile of the energy absorption channel 221 is uniformly arranged along the extending direction of the energy absorption channel 221.

[0144] In the technical solution of this application embodiment, the cross-sectional profile of the energy absorption channel 221 is uniformly arranged, so that the energy absorption channel 221 forms an equal diameter structure. On the one hand, it is convenient to process and shape the energy absorption channel 221; on the other hand, the energy absorption channel 221 has similar energy absorption effects in different areas of the moving part 22, and the energy absorption and buffering effect is more balanced.

[0145] In some examples, at least a portion of the cross-sectional profile of the energy-absorbing channel 221 is uniformly set along the extension direction of the energy-absorbing channel 221. This means that when a cross-section is made at any point along the extension direction of the energy-absorbing channel 221, the profile shape and profile size of different cross-sections remain consistent, and the energy-absorbing channel 221 is a constant diameter structure.

[0146] In some examples, the cross-sectional profile of the energy absorption channel 221 can be a regular or irregular shape such as a circle, ellipse, triangle, rectangle, rhombus, or hexagon. For example, the cross-section of the energy absorption channel 221 is set to a rectangle.

[0147] In some examples, the energy absorption channel 221 is provided on the boss portion 223 and extends along the outer peripheral surface 2231 of the boss portion 223 toward the central axis of the movable member 22. The energy absorption channel 221 is configured as a uniform diameter structure with a uniform cross-section. In other examples, the energy absorption channel 221 extends along the outer peripheral surface 2231 of the extension portion 222 toward the central axis of the movable member 22. The energy absorption channel 221 is configured as a uniform diameter structure with a uniform cross-section.

[0148] In other embodiments of this application, the energy-absorbing channel 221 is provided with a structure in which the cross-sectional size or cross-sectional shape varies, and the change in cross-sectional size can be gradual or stepped. For example, the cross-sectional size of the energy-absorbing channel 221 gradually decreases from the outer peripheral surface 2231 toward the center of the movable member 22; or, the cross-sectional size of the energy-absorbing channel 221 gradually increases from the outer peripheral surface 2231 toward the center of the movable member 22.

[0149] In some examples, the energy absorption channel 221 extends to the extension portion 222 and the boss portion 223, respectively, and the dimension of the extension portion of the energy absorption channel 221 along the first direction Z is smaller than the dimension of the boss portion 223 of the energy absorption channel 221 along the first direction Z.

[0150] Reference Figure 7 , Figure 10 and Figure 11 In some embodiments of this application, the movable member 22 has at least two energy absorption channels 221, and the at least two energy absorption channels 221 are evenly distributed around the central axis L of the movable member 22.

[0151] In the technical solution of this application embodiment, the movable component 22 is provided with at least two energy absorption channels 221 so that multiple energy absorption channels 221 can cover a larger area and improve the energy absorption and buffering effect; at least two energy absorption channels 221 are evenly distributed around the central axis L of the movable component 22, and the evenly distributed energy absorption channels 221 help to improve the balance of the energy absorption and buffering effect in different areas of the movable component 22.

[0152] In some examples, the active component 22 may be provided with one or more (including two) energy absorption channels 221. Different energy absorption channels 221 may adopt the same or different structural forms. Different energy absorption channels 221 may be isolated from each other, or at least two of the different energy absorption channels 221 may be interconnected.

[0153] In some examples, multiple (including two) energy-absorbing channels 221 may be centrally or axially symmetrically distributed around the central axis L of the movable member 22. For example, the movable member 22 may have three energy-absorbing channels 221 with identical structures. All three energy-absorbing channels 221 extend from the outer peripheral surface 2231 of the boss portion 223 toward the central axis L of the movable member 22, and the three energy-absorbing channels 221 are centrally symmetrically distributed.

[0154] Reference Figure 5 , Figure 9 , Figure 14 and Figure 15 In some embodiments of this application, the battery device further includes a protective cover 3, which is connected to the first wall 11 and covers the draining mechanism 2 at least along the first direction Z; a receiving space is provided between the protective cover 3 and the first wall 11, which allows the movable part 22 to move relative to the valve body 21.

[0155] The technical solution of this application embodiment, by adding a protective cover 3, forms a primary protection, which can effectively isolate the transmission of external impact to the drainage mechanism 2, thereby protecting the drainage mechanism 2 and reducing the possibility of damage and failure of the drainage mechanism 2.

[0156] In some examples, the protective cover 3 can be a closed structure or an open structure. The closed structure requires the operator to clean the liquid inside; the open structure can be a frame structure, or a drainage channel can be formed between the protective cover 3 and the first wall 11, or the protective cover 3 can have a drainage hole 32.

[0157] In some examples, the connection between the protective cover 3 and the first wall 11 can be by bonding, welding, snap-fitting, fastener connection or movable connection, for example, the protective cover 3 is connected to the first wall 11 by fasteners such as screws, or one side of the protective cover 3 is hinged to the first wall 11 and the other side is connected to the first wall 11 by snap-fitting. The protective cover 3 can be opened or closed relative to the first wall 11 so as to facilitate maintenance of the drainage mechanism 2 when it is opened.

[0158] In some examples, the protective cover 3 covers the drainage mechanism 2 at least along the first direction Z, which means that the projection of the protective cover 3 onto the same projection plane along the first direction Z covers at least part of the projection of the drainage mechanism 2. It is understood that the protective cover 3 may also cover the drainage mechanism 2 in other directions.

[0159] In some examples, a protective cover 3 is added to the outside of the entire drainage mechanism 2. The protective cover 3 can be connected to the first wall 11 by welding or bolting.

[0160] In some examples, a receiving space is provided between the protective cover 3 and the first wall 11, allowing the movable member 22 to move relative to the valve body 21. This means that along the direction of movement of the movable member 22 relative to the valve body 21 (e.g., the first direction Z), the protective cover 3 and the first wall 11 are spaced apart to form a receiving space, which ensures that the movable member 22 does not interfere with the protective cover 3 during its movement relative to the valve body 21. When the movable member 22 moves away from the valve body 21 to open the liquid passage, and when the movable member 22 moves closer to the valve body 21 to close the liquid passage, the movable member 22 and other structures of the drainage mechanism 2 do not interfere with the protective cover 3.

[0161] Reference Figure 5 , Figure 9 and Figure 16 In some embodiments of this application, the movable member 22 includes a second surface 2221, which faces the protective cover 3 along the first direction Z; the protective cover 3 includes a third surface 311, which is disposed opposite to the second surface 2221, and a buffer gap H is provided between the third surface 311 and the second surface 2221, at least when the movable member 22 moves relative to the valve body 21 to close the liquid passage.

[0162] In the technical solution of this application embodiment, the second surface 2221 of the movable part 22 and the third surface 311 of the protective cover 3 are arranged opposite to each other to form a buffer gap H. The movable part 22 does not contact the protective cover 3. When the protective cover 3 is deformed by external impact, the buffer gap H can provide deformation space, thereby reducing the possibility of impact energy being directly transmitted to the movable part 22 and improving the protective performance of the protective cover 3.

[0163] In some examples, the second surface 2221 of the movable member 22 is the end surface of the movable member 22. For example, the second surface 2221 can be the end face of the extension 222 facing the protective cover 3. The third surface 311 of the protective cover 3 is disposed opposite to the second surface 2221. For example, the third surface 311 is parallel to the second surface 2221. Of course, the third surface 311 and the second surface 2221 can also be disposed at an angle.

[0164] In some examples, a buffer gap H is provided between the third surface 311 and the second surface 2221, which means that the third surface 311 and the second surface 2221 do not contact each other, and there is a gap between the third surface 311 and the second surface 2221 along the first direction Z. The spacing between the third surface 311 and the second surface 2221 can be uniformly set.

[0165] It is understandable that the size of the buffer gap H changes with the movement of the movable member 22 relative to the valve body 21. In some examples, when the movable member 22 moves relative to the valve body 21 to close the liquid passage, a buffer gap H is provided between the third surface 311 and the second surface 2221. In other words, when the movable member 22 is at the position furthest from the third surface 311, the second surface 2221 of the movable member 22 does not contact the third surface 311.

[0166] In some examples, when the movable part 22 moves relative to the valve body 21 to open the liquid passage, a buffer gap H is provided between the third surface 311 and the second surface 2221. In other words, when the movable part 22 is at the position furthest from or closest to the third surface 311, the second surface 2221 of the movable part 22 does not contact the third surface 311.

[0167] In other examples, when the movable part 22 moves relative to the valve body 21 to open the liquid passage and the protective cover 3 does not interfere with the movable part 22, the second surface 2221 of the movable part 22 can contact the third surface 311 when the movable part 22 is located closest to the third surface 311.

[0168] In some examples, the protective cover 3 and the drainage mechanism 2 are provided with a partial air gap where space permits, so that the air gap forms a buffer gap H. When resisting external impact, the protective cover 3 resists the external force first, the buffer gap H buffers part of the impact energy, and the remaining impact energy is then subjected to force and resisted by the moving parts. The energy is then absorbed by the energy absorption channel 221 formed by the hollow structure in the moving parts, which plays the role of energy reduction layer by layer, so as to protect the drainage mechanism 2. It effectively protects the valve body 21 of the drainage mechanism 2 in the ball impact condition, optimizes the sealing failure problem caused by the cracking of the valve body 21, and also improves the ability of the valve body 21 itself to resist external impact.

[0169] Reference Figure 5 , Figure 9 , Figure 15 and Figure 16 In some embodiments of this application, a receiving groove 31 is formed on the side of the protective cover 3 facing the first wall 11. The receiving groove 31 is aligned with the draining mechanism 2 along the first direction Z. The receiving groove 31 is used to accommodate part of the draining mechanism 2.

[0170] In the technical solution of this application embodiment, a receiving groove 31 is formed on the side of the protective cover 3 facing the first wall 11. The receiving groove 31 and the draining mechanism 2 are aligned and arranged along the first direction Z. On the one hand, the receiving groove 31 can accommodate the draining mechanism 2. On the other hand, the receiving groove 31 can conveniently collect the accumulated liquid discharged by the draining mechanism 2.

[0171] In some examples, the shape of the receiving tank 31 is adapted to the shape of the draining mechanism 2. For example, the outer contours of both the receiving tank 31 and the draining mechanism 2 are set to be circular. The inner axial wall of the receiving tank 31 and the outer peripheral wall of the draining mechanism 2 can be spaced apart so that the draining mechanism 2 does not contact the protective cover 3, thereby reducing the force transmission path between the two.

[0172] In some examples, the bottom wall of the receiving groove 31 forms a third surface 311, and the middle part of the protective cover 3 can be configured as a protrusion structure away from the first wall 11 so that the receiving groove 31 corresponding to the draining mechanism 2 is formed in the protrusion structure.

[0173] In some examples, the protective cover 3 is designed with a partial groove, which forms a receiving groove 31 to receive the draining mechanism 2, so that the inner wall of the receiving groove 31 can wrap around and cover the draining mechanism 2 from multiple directions.

[0174] In some examples, when the movable part 22 moves relative to the valve body 21 to open the liquid passage, part of the draining mechanism 2 is housed in the receiving groove 31; when the movable part 22 moves relative to the valve body 21 to close the liquid passage, the draining mechanism 2 may not extend into the receiving groove 31. In other examples, when the movable part 22 moves relative to the valve body 21 to close the liquid passage, part of the draining mechanism 2 is housed in the receiving groove 31, and the receiving groove 31 allows the movable part 22 to move relative to the valve body 21.

[0175] Reference Figure 5 , Figure 9 , Figure 15 , Figure 16 and Figure 17 In some embodiments of this application, the protective cover 3 is provided with at least one drain hole 32; the drain hole 32 is located at the position where the protective cover 3 is provided with the receiving groove 31; and / or, the drain hole 32 penetrates the protective cover 3 along the first direction Z.

[0176] In the technical solution of this application embodiment, the protective cover 3 is provided with at least one drain hole 32. The drain hole 32 helps to drain the accumulated liquid in the protective cover 3. The drain hole 32 is located at the position where the protective cover 3 is provided with the receiving groove 31, so that the accumulated liquid collected in the receiving groove 31 can be discharged through the drain hole 32. The drain hole 32 penetrates the protective cover 3 along the first direction Z. The drain hole 32 and the liquid passage hole extend in the same direction, which improves the continuity of the drainage path and helps to drain the accumulated liquid.

[0177] In some examples, the protective cover 3 has one or more (including two) drainage holes 32, which connect the inner and outer sides of the protective cover 3. The drainage holes 32 can be located at the location where the protective cover 3 is provided with the receiving groove 31. For example, the drainage holes 32 are located on the bottom wall or side wall of the receiving groove 31. The drainage holes 32 can also be provided at other locations of the protective cover 3. For example, the drainage holes 32 are spaced apart from the receiving groove 31.

[0178] In some examples, the drain hole 32 penetrates the protective cover 3 along the first direction Z. In other examples, the direction in which the drain hole 32 penetrates the protective cover 3 forms an angle with the first direction Z. The drain hole 32 may also extend in a straight line, a broken line, or a curve.

[0179] In some examples, partial drain holes 32 are opened on the protective cover 3 so that the liquid can flow out along the drain holes 32 under the action of gravity, which meets the functional requirements; partial drain holes 32 can be opened at the corresponding position of the receiving tank 31. The design of the receiving tank 31 can also make the liquid better collect so that the liquid can flow out along the drain holes 32 under the action of gravity.

[0180] Furthermore, this application embodiment also provides a battery box for accommodating battery cells 4. The battery box includes a box body 1 and a draining mechanism 2. The box body 1 includes a first wall 11, and the first wall 11 has a liquid passage hole that extends along a first direction Z. The draining mechanism 2 includes a valve body 21 and a movable member 22. The valve body 21 is installed in the liquid passage hole, and the movable member 22 moves relative to the valve body 21 along the first direction Z to open or close the liquid passage hole. The movable member 22 has an energy absorption channel 221, and the extension direction of the energy absorption channel 221 has an angle with the first direction Z.

[0181] In the technical solution of this application embodiment, a draining mechanism 2 is provided at the liquid passage of the battery box. The movable part 22 of the draining mechanism 2 has an energy absorption channel 221. The energy absorption channel 221 provides deformation space. The movable part 22 absorbs external impact through collapse deformation, effectively improving the service life of the valve body 21 and the draining mechanism 2.

[0182] Reference Figure 1 In some embodiments of this application, the electrical device includes the battery device of the present application embodiment; or, the electrical device includes the battery box of the present application embodiment.

[0183] The technical solution of this application embodiment includes an electrical device including a draining mechanism 2. The movable part 22 of the draining mechanism 2 has an energy absorption channel 221. The energy absorption channel 221 provides deformation space. The movable part 22 absorbs external impact through collapse deformation, effectively improving the service life of the valve body 21 and the draining mechanism 2.

[0184] In some examples, the electrical equipment is a vehicle, and the battery pack can be located at the bottom, front, or rear of the vehicle. The battery pack can be used to power the vehicle; for example, it can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, with the controller controlling the battery pack to supply power to the power unit 5, for example, to meet the vehicle's power needs during starting, navigation, and driving.

[0185] In some examples, the battery device can serve not only as the operating power source for the vehicle, but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. For example, the battery device supplies power to the power unit 5 to drive the vehicle.

[0186] In one possible embodiment of this application, the draining mechanism 2 of the battery device has a buffering and energy-absorbing function, which can effectively protect the valve body 21 of the draining mechanism 2 in the ball impact condition, solve the sealing failure problem caused by the cracking of the valve body 21, and also improve the ability of the valve body 21 itself to resist external impact.

[0187] Specifically, by optimizing the moving parts in the drainage mechanism 2, a partial hollowing-out design is used to form an energy-absorbing channel 221, enabling the moving parts to collapse and absorb energy when subjected to external forces, thereby protecting the valve body 21 of the drainage mechanism 2 and reducing the stress on it. A protective cover 3 is added to the outside of the entire drainage mechanism 2. The protective cover 3 can be connected to the bottom guard plate by welding or bolting. A drainage hole 32 is opened in the protective cover 3, allowing the liquid to flow out along the drainage hole 32 under the action of gravity, thus fulfilling the functional requirements. The protective cover 3 and the drainage... Mechanism 2 leaves a partial gap to form a buffer gap H when space permits. When resisting external impact, the protective cover 3 resists the external force first, the buffer gap H buffers part of the impact energy, and the remaining impact energy is then subjected to force and resistance by the moving parts. The energy is then absorbed by the energy absorption channel 221 formed by the hollow structure in the moving parts, which plays the role of energy reduction layer by layer, so as to protect the draining mechanism 2. It effectively protects the valve body 21 of the draining mechanism 2 in the ball impact condition and optimizes the sealing failure problem caused by the cracking of the valve body 21.

[0188] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery device, characterized by, The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box.

2. The battery device according to claim 1, characterized by The application relates to a battery device and a battery box.

3. The battery device of claim 2, wherein, The application relates to a battery device and a battery box.

4. The battery device according to any one of claims 1 to 3, characterized by, The application relates to a battery device and a battery box. The application relates to a battery device and a battery box.

5. The battery device of claim 4, wherein, The application relates to a battery device and a battery box.

6. The battery device of claim 4, wherein The application relates to a battery device and a battery box.

7. The battery device according to any one of claims 1 to 3, wherein The application relates to a battery device and a battery box.

8. The battery device of any one of claims 1-3, wherein, The application relates to a battery device and a battery box.

9. The battery device of any one of claims 1-3, wherein, The application relates to a battery device and a battery box. The application relates to a battery device and a battery box.

10. The battery device of claim 9, wherein, The application relates to a battery device and a battery box. The application relates to a battery device and a battery box.

11. The battery device of claim 9, wherein, The application relates to a battery device and a battery box.

12. The battery device of claim 11, wherein, The application relates to a battery device and a battery box. The application relates to a battery device and a battery box.

13. A battery pack, characterized by The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box.

14. An electrical device, characterized by The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device and a battery box. The application relates to a battery device

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