Battery device, electric device and valve body

Abstract

The utility model discloses a battery device, a power utilization device and a valve body, and relates to the technical field of batteries, the battery device comprises at least one battery monomer, a box body and the valve body, the box body comprises a box main body and an upper cover, the upper cover and the box main body enclose to form a containing cavity, the battery monomer is arranged in the containing cavity, the upper cover is provided with a reinforcing part and a through hole communicated with the containing cavity, and the through hole is communicated with the reinforcing part. The through hole is formed in the reinforcing part; the valve body is arranged at the through hole, the battery device is used for vacuumizing the containing cavity through the valve body so that the interior of the containing cavity can be in a negative pressure state, and the upper cover is attached to the single battery under the action of negative pressure.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device, an electrical device and a valve body. Background Art

[0002] As environmental pollution becomes increasingly serious, the new energy industry has attracted more and more attention. In the new energy industry, battery technology is an important factor related to its development.

[0003] In the related art, the battery box includes an upper cover. The existing upper cover has poor structural strength and is prone to abnormal noise during use. Utility Model Content

[0004] The main purpose of the present application is to provide a battery device, aiming to solve the problem that the upper cover of the existing battery device is prone to produce abnormal noise during use.

[0005] The present application provides a battery device, comprising at least one battery cell, a box body and a valve body, the box body comprising a box body and an upper cover, the upper cover and the box body are combined to form a accommodating cavity, the battery cell is arranged in the accommodating cavity, the upper cover is provided with a reinforcement part and a through hole connected to the accommodating cavity, the through hole is arranged on the reinforcement part; the valve body is arranged at the through hole, the battery device is used to evacuate the accommodating cavity through the valve body so that the accommodating cavity is in a negative pressure state, and the upper cover is attached to the battery cell under the action of the negative pressure.

[0006] In the technical solution of the embodiment of the present application, the upper cover is arranged on the box body and enclosed with the box body to form a receiving cavity, the battery cell is arranged in the receiving cavity, the upper cover is provided with a reinforcement part and a through hole, the reinforcement part increases the structural strength of the upper cover, so that the upper cover is not easy to deform and produce abnormal noise; the through hole is arranged on the reinforcement part, thus ensuring the structural strength of the upper cover at the through hole, the valve body is arranged at the through hole, so that the valve body can be stably installed on the upper cover; and the battery device is used to evacuate the receiving cavity through the valve body so that the receiving cavity is in a negative pressure state, the box body is in a negative pressure state, so that there is a pressure difference between the inside and outside of the box body, and the upper cover is attached to the battery cell under the action of the negative pressure, so that the upper cover can be closely attached to the battery cell, avoiding the situation that the upper cover is easily prone to abnormal noise due to the suspension between the upper cover and the battery cell, and at the same time, the upper cover is tightly covered on the battery cell, so that the box body, the upper cover and the battery cell can jointly bear the structural strength, thereby improving the overall structural strength of the battery device. It can be seen that the technical solution of the present application solves the problem that the upper cover in the battery device is prone to abnormal noise during use.

[0007] In some embodiments, the upper cover includes an integrally formed cover body and a plurality of protrusions, wherein the protrusions protrude from the cover body toward a side facing away from the battery cell, and the cover body and the plurality of protrusions are arranged on the outer surface of the upper cover to form a plurality of recesses, and the plurality of protrusions and the plurality of recesses form the reinforcement portion, and the through hole is arranged on the protrusion or the recess, and the cover body is attached to the battery cell under the action of negative pressure. In this embodiment, the cover body and the plurality of protrusions are integrally formed, which improves the overall structural strength of the upper cover, and the plurality of protrusions and the plurality of recesses form the reinforcement portion, so that the structure of the reinforcement portion is stable, thereby further strengthening the structural strength of the upper cover. The through hole is arranged on the protrusion or the recess, so that the upper cover at the through hole has a stronger structure, thereby enabling the valve body to be stably installed on the upper cover.

[0008] In some embodiments, the through hole is provided on the concave portion; and / or the depth of the concave portion is H, and H is not less than 1 mm and not more than 3 mm. In this embodiment, the through hole is provided on the concave portion, and the valve body is installed at the through hole, that is, at least part of the valve body is provided in the concave portion, so that the space of the concave portion is fully utilized, the thickness of the valve body installed on the upper cover is reduced, and the space utilization rate of the upper cover is improved. In addition, by limiting the depth of the groove to between 1 mm and 3 mm, the structural strength of the reinforcement portion is ensured.

[0009] In some embodiments, the battery device further comprises a buffer, which is disposed in the accommodating cavity and between the upper cover and the battery cell, and the buffer abuts against the upper cover and the battery cell respectively. In this embodiment, the buffer can absorb and buffer the deformation of the upper cover, while preventing the upper cover from colliding with the battery cell, thus further improving the problem of the upper cover being easily formed and generating abnormal noise.

[0010] In some embodiments, the valve body includes a valve seat, a valve cover and a stopper, wherein the valve seat is arranged at the through hole, the valve seat has an air passage and an air inlet and an air outlet connected to the air passage, the air inlet is connected to the accommodating chamber, and the air outlet is connected to the outside atmosphere; the valve cover is movably arranged at the air inlet to open or close the air inlet; the stopper is arranged on the valve seat and provides the valve cover with a first force for continuously closing the air inlet to limit the valve cover from opening the air inlet; the stopper is used to open the air inlet when the second force of the air pressure in the accommodating chamber on the valve cover is greater than the first force. In this embodiment, the air inlet on the valve seat is connected to the accommodating chamber of the box body, and the air outlet of the valve seat is connected to the outside atmosphere, and the stopper provides the valve cover with a first force for continuously closing the air inlet to limit the valve cover from opening the air inlet, so that the battery device can maintain a negative pressure state in the box body during normal use, thereby ensuring that the upper cover can fit the battery cell under the action of negative pressure. When the battery device is in thermal runaway, the second force exerted by the air pressure in the box on the valve cover is greater than the first force exerted by the limiter on the valve cover, causing the valve cover to open the air inlet to allow the air pressure in the box to escape from the air inlet, thereby improving the safety of the battery device.

[0011] In some embodiments, the valve seat includes a first seat body and a second seat body, the first seat body is arranged on the upper cover, the first seat body has the gas passage, the first seat body is provided with the air inlet at one end close to the battery cell, the second seat body is arranged at one end of the first seat body away from the battery cell, the second seat body and / or the first seat body are provided with the air outlet, and the stopper is arranged on the first seat body and / or the second seat body and provides the valve cover with a first force to continuously close the air inlet. In this embodiment, the first seat body is provided with an air inlet at one end close to the battery cell so that the air inlet of the valve body is connected with the accommodating cavity, and the second seat body is arranged at one end of the first valve body away from the battery cell so that the air outlet is arranged on the second seat body and / or the first seat body so that the air pressure in the accommodating cavity is released to the outside when the battery device is in thermal runaway, so as to improve the smoothness of the air pressure in the accommodating cavity being discharged to the outside. In addition, by providing the first seat body and the second seat body, the valve cover and the stopper can be easily assembled to simplify the structure of the valve body and improve the production efficiency of the valve body.

[0012] In some embodiments, a positioning portion is provided on the second seat body, and the valve cover includes a covering portion and a guiding portion. The covering portion is provided at the air inlet for opening or closing the air inlet, and the guiding portion is extended along the first direction. The end of the guiding portion close to the air inlet is connected to the covering portion, and the end of the guiding portion close to the air outlet is slidably matched with the positioning portion and can reciprocate along the first direction. In this embodiment, by providing a positioning portion on the second seat body and a guiding portion on the valve cover, the guiding portion and the positioning portion are slidably matched, so that when the valve cover reciprocates along the first direction, the positioning portion and the guiding portion can position and guide the movement of the valve cover, thereby avoiding the displacement of the valve cover, ensuring the stability of the valve cover in opening or closing the air inlet, and improving the reliability of the valve body.

[0013] In some embodiments, the positioning portion is configured as a positioning hole extending through the first direction, and one end of the guide portion close to the air outlet is inserted into the positioning hole so as to be reciprocatingly movable along the first direction. In this embodiment, by inserting the guide portion of the valve cover into the positioning hole on the second seat body, not only the structure of the sliding fit between the valve cover and the second seat body is simplified, but also the stability of the reciprocating movement of the valve cover along the first direction is improved.

[0014] In some embodiments, the second seat body is connected to the first seat body, and the second seat body is provided with a plurality of the air outlets, which are arranged around the circumference of the positioning hole. In this embodiment, the plurality of air outlets improves the smoothness of the airflow to be discharged outwards, and the second seat body is provided with the positioning hole and the plurality of air outlets, so that the structure on the second seat body is compact, the utilization rate is high, and no additional processing is required on the first seat body, which is conducive to simplifying the structure of the valve seat.

[0015] In some embodiments, the first seat body includes a bottom wall, a side wall and a top wall connected in sequence, the side wall is arranged in an annular shape and surrounded between the bottom wall and the top wall, the bottom wall is arranged in the accommodating cavity, the bottom wall is provided with the air inlet, the top wall is arranged on the upper cover, the second seat body is connected to the top wall and / or the side wall, the second seat body and / or the top wall are configured with the air outlet, and the cover part closes the air inlet under the action of negative pressure and is carried on the bottom wall. In this embodiment, the first seat body includes a bottom wall, a side wall and a top wall connected in sequence, and the valve body is conveniently fixed by arranging the top wall on the upper cover; the side wall is arranged in an annular shape and surrounded between the bottom wall and the top wall to form an air passage; the air inlet is arranged on the bottom wall, so that the cover part of the valve cover can close the air inlet at the same time when it is carried on the bottom wall, thereby improving the stability of the valve cover closing the air inlet and simplifying the structure of the valve body.

[0016] In some embodiments, the stopper includes an elastic member, the elastic member is telescopically arranged in the air passage along the first direction, one end of the elastic member abuts against the second seat body, and the other end of the elastic member abuts against the cover portion, and the elastic member is configured to provide a thrust to the cover portion to continuously close the air inlet. In this embodiment, the resilience of the elastic member can continuously provide a thrust to the cover portion, and when the battery device is in normal use, the cover portion of the valve cover can continuously and stably close the air inlet under the action of the thrust, so that the accommodating cavity of the box body is kept in a negative pressure state, so that the upper cover can stably fit the battery cell.

[0017] In some embodiments, the elastic member is constructed as a spring, and the spring is sleeved on the guide portion. In this embodiment, the spring has a simple structure and good elastic potential energy, and can effectively keep the valve cover in a state of closing the air inlet; and the spring is sleeved on the guide portion, which is conducive to simplifying the assembly process and improving the installation stability of the elastic member.

[0018] In some embodiments, the limiter includes a magnetic member and a magnetic accessory that magnetically cooperates with the magnetic member, one of the magnetic member and the magnetic accessory is disposed on the first seat at the air inlet, and the other is disposed on the covering portion, and the covering portion is configured to close the air inlet under the action of the magnetic attraction of the magnetic member and the magnetic accessory. In this embodiment, through the magnetic attraction between the magnetic member and the magnetic accessory, when the battery device is in normal use, the covering portion of the valve cover can continuously and stably close the air inlet under the action of the magnetic attraction, so that the accommodating cavity of the box body is maintained in a negative pressure state, thereby allowing the upper cover to stably fit the battery cell. The magnetic member has the advantages of strong and stable magnetism, which is conducive to improving the stability of the first force provided by the limiter to the valve cover to continuously close the air inlet.

[0019] In some embodiments, the valve body further includes a first seal, the valve seat and / or the valve cover are provided with a first mounting groove near the air inlet, and the first seal is provided in the first mounting groove to seal the gap between the valve cover and the valve seat when the valve cover closes the air inlet; and / or, the valve body further includes a second seal, the valve seat and / or the upper cover are provided with a second mounting groove near the through hole, and the second seal is provided in the second mounting groove to seal the gap between the valve seat and the upper cover. In this embodiment, the first seal can seal the gap between the valve cover and the valve seat when the valve cover closes the air inlet, thereby improving the sealing of the valve cover to the air inlet. By providing the second seal, the gap between the valve seat and the upper cover can be sealed to ensure that the accommodating chamber of the box body can be maintained in a negative pressure state, so that the upper cover can be stably attached to the battery cell.

[0020] In some embodiments, the valve seat is provided with a mounting hole, the upper cover is provided with a fixing portion, and the valve seat is connected to the fixing portion through a fastener passing through the mounting hole, so as to fix the valve seat to the upper cover. In this embodiment, the valve seat can be stably mounted on the upper cover by fasteners passing through the mounting hole on the valve seat and fixing it to the upper cover, and the fixing method of the valve seat is simple and has high stability.

[0021] In some embodiments, the upper cover is provided with a fixing hole corresponding to the mounting hole, the battery device includes a fixing sleeve, the fixing sleeve is provided at the fixing hole and is sealed and connected to the upper cover, the fixing sleeve is provided with an opening on the side facing the mounting hole, and the fixing portion is provided on the inner wall of the fixing sleeve. In this embodiment, by providing a fixing hole on the upper cover, it is convenient to seal the fixing sleeve with the upper cover so that the accommodating cavity can be maintained in a negative pressure state. The fixing sleeve is provided with an opening on the side facing the outside of the accommodating cavity, which is convenient for processing the fixing portion in the fixing sleeve, thereby facilitating the fastener to be inserted into the fixing sleeve and connected with the fixing portion, thereby improving the convenience of assembly.

[0022] The present application also proposes an electrical device, which includes a battery device, and the battery device is used to store or provide electrical energy.

[0023] The present application also proposes a valve body, which is used for the battery device as described above. The battery device includes a box body, and the valve body includes a valve seat, a valve cover and a limit member, the valve seat is used to be installed on the upper cover of the box body, the valve seat has an air passage and an air inlet and an air outlet connected to the air passage, the air inlet is used to be connected to the accommodating chamber of the box body, and the air outlet is connected to the outside atmosphere; the valve cover is movably arranged at the air inlet to open or close the air inlet; the limit member is arranged on the valve seat and provides a first force to the valve cover to continuously close the air inlet to limit the valve cover from opening the air inlet; the battery device is used to evacuate the accommodating chamber of the box body through the valve body so that the accommodating chamber is in a negative pressure state, and the upper cover of the box body is attached to the battery cell in the box body under the action of the negative pressure; the limit member is used to open the air inlet when the second force of the air pressure in the accommodating chamber of the box body on the valve cover is greater than the first force.

[0024] In the technical solution of the embodiment of the present application, the air inlet on the valve seat is connected to the accommodating cavity of the box body, and the air outlet of the valve seat is connected to the outside atmosphere. The first force for continuously closing the air inlet is provided to the valve cover through the limiter to limit the valve cover from opening the air inlet, so that the battery device can maintain a negative pressure state in the box body during normal use, thereby ensuring that the upper cover can fit the battery cell under the action of negative pressure. When the battery device has thermal runaway, the second force of the air pressure in the box body on the valve cover is greater than the first force of the limiter on the valve cover, so that the valve cover opens the air inlet, so that the air pressure in the box body can be released from the air inlet to the outside, thereby improving the safety of the battery device. The battery device can evacuate the accommodating chamber through the valve body to make the accommodating chamber in a negative pressure state, and the box body in a negative pressure state, so that there is a pressure difference between the inside and outside of the box body, and the upper cover is fitted to the battery cell under the action of negative pressure, so that the upper cover can fit the battery cell tightly, avoiding the situation where the upper cover and the battery cell are suspended in the air, which causes the upper cover to easily produce abnormal noise. At the same time, the upper cover is tightly wrapped on the battery cell, so that the box body, the upper cover and the battery cell can jointly bear the structural strength, thereby improving the overall structural strength of the battery device.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0028] Figure 2 A schematic diagram of the exploded structure of a battery device according to some embodiments of the present application;

[0029] Figure 3 A schematic diagram of the structure of a battery device according to some embodiments of the present application;

[0030] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0031] Figure 5 for Figure 3 Schematic diagram of the partial structure of the decomposition;

[0032] Figure 6 for Figure 5 Schematic diagram of some structures in;

[0033] Figure 7 This is a schematic diagram of the exploded structure of the valve body of some embodiments of the present application;

[0034] Figure 8 A cross-sectional view of a valve body according to some embodiments of the present application;

[0035] Fig. 9 for Figure 3 A schematic diagram of the structure from another perspective;

[0036] Fig.10 for Fig. 9 Sectional view along line II;

[0037] Fig.11 for Fig.10 Enlarged view of point B in the middle.

[0038] Description of Figure Numbers:

[0039] 1. Vehicles;

[0040] 10. Battery device;

[0041] 100. Battery cell;

[0042] 200, box body; 210, box body; 220, upper cover; 221, reinforcement part; 2211, protrusion; 2212, recess; 222, through hole; 223, cover body; 230, accommodating cavity; 240, fixing sleeve; 241, fixing part;

[0043] 300, valve body; 310, valve seat; 311, air passage; 312, air inlet; 313, air outlet; 314, first seat body; 3141, bottom wall; 3142, side wall; 3143, top wall; 315, second seat body; 316, positioning part; 317, mounting hole; 320, valve cover; 321, covering part; 322, guide part; 330, stopper; 331, elastic part; 340, first sealing part; 350, second sealing part; 360, fastener;

[0044] 400, buffer parts;

[0045] 20. Controller;

[0046] 30. Motor.

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0050] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0051] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0056] As batteries are widely used in energy storage power systems, electric vehicles and other fields, for example: energy storage power systems include hydropower, wind power, thermal power, solar power and other power station energy storage systems; electric vehicles include electric cars, electric motorcycles and electric bicycles, etc.; people pay special attention to battery technology.

[0057] In the related art, the battery box includes a box body and an upper cover. The upper cover and the box body are combined to form a accommodating cavity. The battery cell is arranged in the accommodating cavity. The upper cover is a sheet metal part. The structural strength of the sheet metal part is poor. It is easy to produce rebound and waves during use, which is easy to produce abnormal noise.

[0058] The box also contains structures such as a wiring harness, and space needs to be reserved for these structures, resulting in a large amount of empty space inside the box. The upper cover is prone to rebound due to the empty space in the accommodating cavity, which can easily produce abnormal noises.

[0059] Based on the above considerations, in order to solve the problem that the upper cover in the existing battery device is prone to abnormal noise during use, the present application proposes a new battery device 10, which includes at least one battery cell 100, a box body 200 and a valve body 300. The box body 200 includes a box body 210 and an upper cover 220. The upper cover 220 is provided with a reinforcement portion 221 and a through hole 222. The reinforcement portion 221 increases the structural strength of the upper cover 220, so that the upper cover 220 is not easily deformed and produces abnormal noise; the through hole 222 is provided on the reinforcement portion 221, thereby ensuring that the upper cover 220 at the through hole 222 is 0 structural strength, the valve body 300 is arranged at the through hole 222, so that the valve body 300 can be stably installed on the upper cover 220; the battery device 10 is used to evacuate the accommodating chamber 230 through the valve body 300 so that the accommodating chamber 230 is in a negative pressure state, and the box body 200 is in a negative pressure state, so that there is a pressure difference between the inside and outside of the box body 200, and the upper cover 220 is attached to the battery cell 100 under the action of negative pressure, so that the upper cover 220 can be closely attached to the battery cell 100, avoiding the situation that the upper cover 220 is easily prone to abnormal noise due to the suspension between the upper cover 220 and the battery cell 100. In addition, the upper cover 220 is tightly wrapped on the battery cell 100, so that the box body 210, the upper cover 220 and the battery cell 100 can jointly bear the structural strength, thereby improving the overall structural strength of the battery device 10.

[0060] It is further explained that the above-mentioned battery device may include a plurality of battery cells. Among them, the battery cell may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The shape of the battery cell may be cylindrical, flat, rectangular or other shapes, and the present application does not specifically limit the shape of the battery cell. Multiple battery cells may be connected in series, in parallel, or in a mixed connection including both series and parallel connections. Several battery cells may be connected in series, in parallel or in a mixed connection to form a battery module, and the flexible circuit board may at least be used to collect voltage signals of a battery module composed of multiple battery cells.

[0061] The present application provides an electric device using the battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0062] For the convenience of description, the following embodiments are described by taking a vehicle 1 as an example of an electrical device in an embodiment of the present application.

[0063] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1 provided for some embodiments of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is provided inside the vehicle 1, and the battery device 10 may be provided at the bottom, head or tail of the vehicle 1. The battery device 10 may be used to power the vehicle 1, for example, the battery device 10 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 20 and a motor 30, and the controller 20 is used to control the battery device 10 to power the motor 30, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0064] In some embodiments of the present application, the battery device 10 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0065] Please refer to Figure 2 , Figure 2 The exploded view of the battery device 10 provided in some embodiments of the present application. The battery device 10 includes a box body 200 and a battery cell 100, and the battery cell 100 is arranged in the box body 200. Among them, the box body 200 is used to provide a storage space for the battery cell 100, and the box body 200 can adopt a variety of structures. In some embodiments, the box body 200 includes a box body 210 and an upper cover 220, and the box body 210 and the upper cover 220 cover each other, and the box body 210 and the upper cover 220 jointly define a storage space for accommodating the battery cell 100. The specific structure of the box body 210 and the upper cover 220 is not limited. The box body 210 can be a hollow structure with one end open, and the upper cover 220 can be a plate-like structure. The upper cover 220 covers the open side of the box body 210 to jointly define the storage space; the box body 210 and the upper cover 220 can also be hollow structures with one side open, and the open side of the upper cover 220 covers the open side of the box body 210. Of course, the box body 200 formed by the box body 210 and the upper cover 220 can be in various shapes, such as a cylinder, a cuboid, etc.

[0066] In a battery device, there may be multiple battery cells, which may be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells is accommodated in a box; of course, the battery device may also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then accommodated in a box. The battery device may also include other structures, for example, the battery device may also include a busbar component for realizing electrical connection between multiple battery cells.

[0067] Each battery cell may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell may be cylindrical, flat, rectangular, or in other shapes.

[0068] See also Figures 3 to 11 In one embodiment of the present application, the present application provides a battery device 10. The battery device 10 includes at least one battery cell 100, a box body 200 and a valve body 300. The box body 200 includes a box body 210 and an upper cover 220. The upper cover 220 and the box body 210 are enclosed to form a receiving chamber 230. The battery cell 100 is arranged in the receiving chamber 230. The upper cover 220 is provided with a reinforcement portion 221 and a through hole 222 communicating with the receiving chamber 230. The through hole 222 is provided on the reinforcement portion 221. The valve body 300 is provided at the through hole 222. The battery device 10 is used to evacuate the receiving chamber 230 through the valve body 300 so that the receiving chamber 230 is in a negative pressure state. The upper cover 220 is attached to the battery cell 100 under the action of the negative pressure.

[0069] The specific material of the box body 210 and the upper cover 220 is not limited. In some embodiments, the box body 210 and the upper cover 220 can be made of high-strength metal materials, such as but not limited to: aluminum alloy, alloy steel, etc. The upper side of the box body 210 can be open, and the upper cover 220 covers the open side of the box body 210 to jointly define the accommodating cavity 230, and the battery cell 100 is installed in the accommodating cavity 230.

[0070] A reinforcing portion 221 is provided on the upper cover 220, and the reinforcing portion 221 increases the structural strength of the upper cover 220. The specific structure of the reinforcing portion 221 is not limited, for example but not limited to; a protrusion 2211 is provided on the upper cover 220, which is arranged on the side facing away from the battery cell 100, and the protrusion 2211 can increase the structural strength of the upper cover 220; or, a recess 2212 is provided on the upper cover 220, which is arranged on the side close to the battery cell 100, and the recess 2212 can increase the structural strength of the upper cover 220; or, a protrusion 2211 is provided on the upper cover 220, which is arranged on the side facing away from the battery cell 100, and a recess 2212 is provided on the side close to the battery cell 100, and the protrusion 2211 and the recess 2212 cooperate to increase the structural strength of the upper cover 220; wherein, the number of the protrusion 2211 and the recess 2212 can be one, two, or more, and is not specifically limited.

[0071] The reinforcing portion 221 is provided with a through hole 222 which is connected to the accommodating cavity 230 , so that the structure of the upper cover 220 at the through hole 222 has greater strength. The valve body 300 is installed at the through hole 222 on the reinforcing portion 221 so that the valve body 300 can be stably installed on the upper cover 220 .

[0072] The valve body 300 is a regulating valve for regulating the air pressure in the receiving chamber 230 of the box body 200. The battery device 10 is used to evacuate the receiving chamber 230 through the valve body 300 so that the receiving chamber 230 is in a negative pressure state. The receiving chamber 230 of the box body 200 is in a negative pressure state, which means that the pressure in the receiving chamber 230 is less than the atmospheric pressure, there is a pressure difference between the inside and outside of the box body 200, and the pressure of the air pressure in the receiving chamber 230 is negative pressure relative to the atmospheric pressure. When assembling the battery device 10, the valve body 300 can be installed at the through hole 222 of the upper cover 220, and the battery cell 100 can be installed in the box body 200, and then the box body 200 can be evacuated through the valve body 300 so that the receiving chamber 230 of the box body 200 is in a negative pressure, and the upper cover 220 is attached to the battery cell 100 under the action of the negative pressure. Of course, under the action of the negative pressure, part of the structure of the box body 210 can also be attached to the battery cell 100. Part of the structure of the box 200 can also fit other structural parts in the box 200. For example, if there are structures such as a wiring harness and a busbar in the box 200, the upper cover 220 can also fit the wiring harness, the busbar and other structural parts under the action of negative pressure. In addition, the upper cover 220 is closely attached to the structural parts inside the box 200 under the action of negative pressure, which can increase the safety gap with the whole vehicle.

[0073] Furthermore, since the box body 200 is in a negative pressure state, the box body 210 and the upper cover 220 are not easy to bulge or produce abnormal noise, so that the box body 200 is not easy to interfere with the frame of the entire vehicle; the upper cover 220 is attached to the battery cell 100, and the structural parts in the box body 200 are not easy to move relative to the upper cover 220 and the box body 210, and are not easy to wear, thereby reducing the probability of short circuit and improving the reliability of the battery device 10.

[0074] In the technical solution of the embodiment of the present application, the upper cover 220 is arranged on the box body 210 and encloses the box body 210 to form a receiving chamber 230, and the battery cell 100 is arranged in the receiving chamber 230. The upper cover 220 is provided with a reinforcing portion 221 and a through hole 222. The reinforcing portion 221 increases the structural strength of the upper cover 220, so that the upper cover 220 is not easily deformed and produces abnormal noise; the through hole 222 is arranged on the reinforcing portion 221, so that the structural strength of the upper cover 220 at the through hole 222 is ensured, and the valve body 300 is arranged at the through hole 222, so that the valve body 300 can be stably installed on the upper cover 220; and the battery device 10 is used to pass through the valve body 30 0 The accommodating chamber 230 is evacuated to make the accommodating chamber 230 in a negative pressure state, and the box body 200 is in a negative pressure state, so that there is a pressure difference between the inside and outside of the box body 200, and the upper cover 220 is attached to the battery cell 100 under the action of the negative pressure, so that the upper cover 220 can be closely attached to the battery cell 100, avoiding the situation that the upper cover 220 is easily to produce abnormal noise due to the suspension between the upper cover 220 and the battery cell 100, and at the same time, the upper cover 220 is tightly wrapped on the battery cell 100, so that the box body 210, the upper cover 220 and the battery cell 100 can jointly bear the structural strength, thereby improving the overall structural strength of the battery device 10. It can be seen that the technical solution of the present application solves the problem that the upper cover 220 in the battery device 10 is easy to produce abnormal noise during use.

[0075] See also Figures 3 to 5 According to some embodiments of the present application, optionally, the upper cover 220 includes an integrally formed cover body 223 and a plurality of protrusions 2211, the protrusions 2211 protrude on the cover body 223 toward the side facing away from the battery cell 100, the cover body 223 and the plurality of protrusions 2211 are arranged on the outer surface of the upper cover 220 to form a plurality of recesses 2212, the plurality of protrusions 2211 and the plurality of recesses 2212 form a reinforcing portion 221, the through holes 222 are arranged on the protrusions 2211 or the recesses 2212, and the cover body 223 is attached to the battery cell 100 under the action of negative pressure.

[0076] The cover body 223 and the plurality of protrusions 2211 are integrally stamped and formed, that is, the upper cover 220 is an integrally stamped and formed part, so as to facilitate the processing and forming of the upper cover 220, which is conducive to reducing the production cost of the upper cover 220 and increasing the structural strength of the upper cover 220. The plurality of protrusions 2211 are convexly arranged on the outer surface of the upper cover 220, and the specific shapes and positions of the plurality of protrusions 2211 are not limited, and the protrusions 2211 can be circular, square, or other shapes.

[0077] The plurality of protrusions 2211 and the cover body 223 are surrounded by a plurality of recesses 2212, which may be in the shape of a groove. The reinforcement part 221 formed by the plurality of protrusions 2211 and the plurality of recesses 2212 provides the upper cover 220 with good structural strength, and the upper cover 220 is not easy to rebound under the action of the reinforcement part 221. At the same time, the upper cover 220 is attached to the battery cell 100 under the action of negative pressure, further solving the problem that the upper cover 220 is easy to produce abnormal noise during use.

[0078] In this embodiment, the cover body 223 and the plurality of protrusions 2211 are integrally formed, which improves the overall structural strength of the upper cover 220, and the plurality of protrusions 2211 and the plurality of recesses 2212 form a reinforcement portion 221, which stabilizes the structure of the reinforcement portion 221, thereby further strengthening the structural strength of the upper cover 220. The through hole 222 is provided on the protrusion 2211 or the recess 2212, so that the upper cover 220 at the through hole 222 has a stronger structure, thereby enabling the valve body 300 to be stably mounted on the upper cover 220.

[0079] See also Figures 3 to 5 According to some embodiments of the present application, optionally, the through hole 222 is provided on the recess 2212; and / or the depth of the recess 2212 is H, and H is not less than 1 mm and not more than 3 mm.

[0080] The specific shape of the recess 2212 is not limited, and the recess 2212 can be opened on one side, two sides, or three sides, as long as the recess 2212 is formed by the cover body 223 and the protrusion 2211 on the outer surface of the upper cover 220. The depth of the recess 2212 can be 1 mm, 2 mm, 3 mm, etc., and is not specifically limited.

[0081] In this embodiment, the through hole 222 is provided on the recess 2212, and the valve body 300 is installed at the through hole 222, that is, at least part of the valve body 300 is provided in the recess 2212, so that the space of the recess 2212 is fully utilized, the thickness of the valve body 300 installed on the upper cover 220 is reduced, and the space utilization rate of the upper cover 220 is improved. In addition, by limiting the depth of the groove to between 1 mm and 3 mm, the structural strength of the reinforcement part 221 is ensured.

[0082] See also Figure 5 According to some embodiments of the present application, optionally, the battery device 10 further includes a buffer member 400 , which is disposed in the accommodating cavity 230 and between the upper cover 220 and the battery cell 100 , and the buffer member 400 abuts against the upper cover 220 and the battery cell 100 , respectively.

[0083] The material and thickness of the buffer 400 can be selected as needed, and the buffer 400 can be a thin sheet structure. Exemplarily, the buffer 400 can be foam.

[0084] In this embodiment, the buffer member 400 can absorb and buffer the deformation of the upper cover 220 and prevent the upper cover 220 from colliding with the battery cell 100, thereby further improving the problem that the upper cover 220 is easily deformed and produces abnormal noise.

[0085] See also Figures 6 to 11 According to some embodiments of the present application, optionally, the valve body 300 includes a valve seat 310, a valve cover 320 and a limiter 330, the valve seat 310 is arranged at the through hole 222, the valve seat 310 has an air passage 311 and an air inlet 312 and an air outlet 313 connected to the air passage 311, the air inlet 312 is connected to the accommodating chamber 230, and the air outlet 313 is connected to the outside atmosphere; the valve cover 320 is movably arranged at the air inlet 312 to open or close the air inlet 312; the limiter 330 is arranged on the valve seat 310 and provides a first force to continuously close the air inlet 312 to the valve cover 320 to limit the valve cover 320 from opening the air inlet 312; the limiter 330 is used to open the air inlet 312 when the second force of the air pressure in the accommodating chamber 230 on the valve cover 320 is greater than the first force.

[0086] The valve seat 310 is installed at the through hole 222 of the upper cover 220, and the valve seat 310 can be sealed and connected to the upper cover 220. The air passage 311 can be arranged in a straight cylindrical shape or in a circuitous bending shape, which is not limited here. For example, the air passage 311 is arranged in a straight cylindrical shape, that is, the extension direction of the air passage 311 is extended along the thickness direction of the box body 200, the air inlet 312 is located at one end of the valve seat 310 close to the battery cell 100, and the air outlet 313 is located at one end of the valve seat 310 away from the battery cell 100.

[0087] The valve cover 320 is movably disposed at the air inlet 312, or the valve cover 320 is rotatably disposed at the air inlet 312, and it is sufficient that the valve cover 320 can open or close the air inlet 312. The specific structure and installation position of the limiter 330 are not limited, and it is sufficient that the limiter 330 can provide the valve cover 320 with a first force to continuously close the air inlet 312, and the first force can be a thrust or a pull. The valve cover 320 is limited to open the air inlet 312 by the first force, so that when the battery device 10 is in normal use, the accommodating chamber 230 of the box body 200 is maintained in a negative pressure state to ensure that the upper cover 220 fits the battery cell 100 under the action of the negative pressure.

[0088] In this embodiment, the air inlet 312 on the valve seat 310 is in communication with the accommodating chamber 230 of the housing 200, and the air outlet 313 of the valve seat 310 is in communication with the outside atmosphere. The first force for continuously closing the air inlet 312 is provided to the valve cover 320 through the stopper 330, so as to limit the valve cover 320 from opening the air inlet 312, so that the battery device 10 can maintain a negative pressure state in the housing 200 during normal use, thereby ensuring that the upper cover 220 can be attached to the battery cell 100 under the action of negative pressure. When the battery device 10 has thermal runaway, the second force of the air pressure in the housing 200 on the valve cover 320 is greater than the first force of the stopper 330 on the valve cover 320, so that the valve cover 320 opens the air inlet 312, so that the air pressure in the housing 200 can be released from the air inlet 312, thereby improving the safety of the battery device 10.

[0089] See also Figures 6 to 11 According to some embodiments of the present application, optionally, the valve seat 310 includes a first seat body 314 and a second seat body 315, the first seat body 314 is disposed on the upper cover 220, the first seat body 314 has an air passage 311, an end of the first seat body 314 close to the battery cell 100 is configured with an air inlet 312, the second seat body 315 is disposed at an end of the first seat body 314 away from the battery cell 100, an air outlet 313 is configured on the second seat body 315 and / or the first seat body 314, and a limiting member 330 is disposed on the first seat body 314 and / or the second seat body 315 and provides a first force to continuously close the air inlet 312 to the valve cover 320.

[0090] The first seat body 314 is provided with an air outlet 313; or, the second seat body 315 is provided with an air outlet 313; or, the first seat body 314 and the second seat body 315 are provided with an air outlet 313 together. The valve cover 320 can be movably arranged on the first seat body 314, or, the valve cover 320 can be movably arranged on the second seat body 315, and it is sufficient that the valve cover 320 can open or close the air inlet 312 by movement. The installation position of the limiter 330 is also not limited, and the limiter 330 can be installed on the first seat body 314 or on the second seat body 315, and it is sufficient that the limiter 330 can provide the valve cover 320 with a first force to continuously close the air inlet 312.

[0091] In this embodiment, the first seat body 314 is configured with an air inlet 312 at one end close to the battery cell 100, so that the air inlet 312 of the valve body 300 is connected to the accommodating chamber 230, and the second seat body 315 is provided at one end of the first valve body 300 away from the battery cell 100, so that the second seat body 315 and / or the first seat body 314 are configured with an air outlet 313, so that the air pressure in the accommodating chamber 230 is released to the outside when the battery device 10 is in thermal runaway, so as to improve the smoothness of the air pressure in the accommodating chamber 230 to be discharged to the outside. In addition, by providing the first seat body 314 and the second seat body 315, the valve cover 320 and the stopper 330 can be easily assembled, so as to simplify the structure of the valve body 300 and improve the production efficiency of the valve body 300.

[0092] See also Figures 6 to 8 According to some embodiments of the present application, optionally, a positioning portion 316 is provided on the second seat body 315, and the valve cover 320 includes a covering portion 321 and a guide portion 322, the covering portion 321 is provided at the air inlet 312 to open or close the air inlet 312, the guide portion 322 is extended along the first direction, one end of the guide portion 322 close to the air inlet 312 is connected to the covering portion 321, and one end of the guide portion 322 close to the air outlet 313 is slidably matched with the positioning portion 316 and can reciprocate along the first direction.

[0093] One of the positioning portion 316 and the guide portion 322 may be hole-shaped, and the other may be column-shaped, so that the positioning portion 316 and the guide portion 322 can slide together. The area of ​​the covering portion 321 is larger than the opening area of ​​the air inlet 312, so that the covering portion 321 can fully cover the air inlet 312.

[0094] In this embodiment, a positioning portion 316 is provided on the second seat body 315, and a guide portion 322 is provided on the valve cover 320. The guide portion 322 slidably cooperates with the positioning portion 316, so that when the valve cover 320 moves back and forth along the first direction, the positioning portion 316 and the guide portion 322 can position and guide the movement of the valve cover 320, thereby avoiding the displacement of the valve cover 320 and ensuring the stability of the valve cover 320 in opening or closing the air inlet 312, thereby improving the reliability of the valve body 300.

[0095] According to some embodiments of the present application, optionally, the positioning portion 316 is constructed as a positioning hole that penetrates along the first direction, and one end of the guide portion 322 close to the air outlet 313 is inserted into the positioning hole so as to be reciprocally movable along the first direction.

[0096] The cross-sectional shape of the positioning hole can be circular, square, or other shapes, which are not specifically limited here. It only requires that one end of the guide portion 322 be slidably inserted into the positioning hole, and the positioning hole and the guide portion 322 slide in cooperation to position and guide the moving direction of the valve cover 320, thereby avoiding the valve cover 320 from moving out of position.

[0097] In this embodiment, by inserting the guide portion 322 of the valve cover 320 into the positioning hole on the second seat body 315, not only the structure of the sliding fit between the valve cover 320 and the second seat body 315 is simplified, but also the stability of the reciprocating movement of the valve cover 320 along the first direction is improved.

[0098] See also Figures 6 to 8 According to some embodiments of the present application, optionally, the second base body 315 is connected to the first base body 314, and a plurality of air outlets 313 are provided on the second base body 315, and the plurality of air outlets 313 are arranged around the circumference of the positioning hole.

[0099] The second seat body 315 can be interference fit with the first seat body 314, or can be threaded or snap-fitted, which is not limited here. When assembling the valve body 300, the valve cover 320 can be installed in the air passage 311 first, and then the second seat body 315 can be installed on the first seat body 314 and limitedly cooperate with the valve cover 320 to limit and fix the valve cover 320. The multiple air outlets 313 can be discontinuously annular around the circumference of the positioning hole, so that the structure of the second seat body 315 can be fully utilized to improve the smoothness of exhaust.

[0100] In this embodiment, multiple air outlets 313 improve the smoothness of air discharge to the outside, and the second seat body 315 is provided with positioning holes and multiple air outlets 313, so that the structure on the second seat body 315 is compact and has high utilization rate, and no additional processing is required on the first seat body 314, which is conducive to simplifying the structure of the valve seat 310.

[0101] See also Figures 8 to 11 According to some embodiments of the present application, optionally, the first seat body 314 includes a bottom wall 3141, a side wall 3142 and a top wall 3143 connected in sequence, the side wall 3142 is arranged in a ring shape and surrounded by the bottom wall 3141 and the top wall 3143, the bottom wall 3141 is arranged in the accommodating cavity 230, the bottom wall 3141 is provided with an air inlet 312, the top wall 3143 is arranged on the upper cover 220, the second seat body 315 is connected to the top wall 3143 and / or the side wall 3142, the second seat body 315 and / or the top wall 3143 are constructed with an air outlet 313, and the covering portion 321 closes the air inlet 312 under the action of negative pressure and is carried on the bottom wall 3141.

[0102] The side wall 3142 connects the bottom wall 3141 and the top wall 3143. The side wall 3142 is arranged in an annular shape and is arranged between the bottom wall 3141 and the top wall 3143 to enclose the air passage 311. The top wall 3143 is supported on the upper cover 220. The top wall 3143 can be fixedly connected to the upper cover 220 by a fastener 360 to improve the stability of the valve body 300 installed on the upper cover 220.

[0103] In this embodiment, the first seat body 314 includes a bottom wall 3141, a side wall 3142 and a top wall 3143 which are connected in sequence. By arranging the top wall 3143 on the upper cover 220, it is convenient to fix the valve body 300; the side wall 3142 is arranged in a ring shape and is surrounded between the bottom wall 3141 and the top wall 3143 to form an air passage 311; the air inlet 312 is arranged on the bottom wall 3141, so that the covering part 321 of the valve cover 320 can simultaneously close the air inlet 312 when it is supported on the bottom wall 3141, thereby improving the stability of the valve cover 320 in closing the air inlet 312 and also helping to simplify the structure of the valve body 300.

[0104] See also Figures 8 to 11 According to some embodiments of the present application, optionally, the limiting member 330 includes an elastic member 331, which is telescopically arranged in the air passage 311 along the first direction, one end of the elastic member 331 abuts against the second seat body 315, and the other end of the elastic member 331 abuts against the covering portion 321, and the elastic member 331 is configured to provide a thrust to the covering portion 321 to continuously close the air inlet 312.

[0105] The elastic member 331 has a rebound force, so as to provide a thrust to the covering portion 321 through the rebound force. The elastic member 331 can be a spring, an elastic block, etc.

[0106] In this embodiment, the resilience of the elastic member 331 can continuously provide thrust to the covering portion 321. When the battery device 10 is in normal use, the covering portion 321 of the valve cover 320 can continuously and stably close the air inlet 312 under the action of the thrust, so that the accommodating cavity 230 of the box body 200 is maintained in a negative pressure state, so that the upper cover 220 can stably fit the battery cell 100.

[0107] According to some embodiments of the present application, optionally, the elastic member 331 is constructed as a spring, and the spring is sleeved on the guide portion 322 .

[0108] In this embodiment, the spring has a simple structure and good elastic potential energy, which can effectively keep the valve cover 320 in a state of closing the air inlet 312; and the spring is sleeved on the guide portion 322, which is conducive to simplifying the assembly process and improving the installation stability of the elastic member 331.

[0109] According to some embodiments of the present application, optionally, the limiting member 330 includes a magnetic member and a magnetic accessory that magnetically cooperates with the magnetic member, one of the magnetic member and the magnetic accessory is arranged on the first seat body 314 at the air inlet 312, and the other is arranged on the covering portion 321, and the covering portion 321 is configured to close the air inlet 312 under the action of the magnetic force of the magnetic member and the magnetic accessory.

[0110] The magnetic attraction component can be a magnet, and the magnetic attraction accessory can be a magnet, or a magnet, or a metal component that can be magnetically attracted to a magnet or a magnet. The magnetic attraction component can be arranged on the first seat body 314 at the air inlet 312, and the magnetic attraction accessory is arranged on the covering part 321. With such an arrangement, a magnetic attraction force can be generated between the magnetic attraction component and the magnetic attraction accessory, and the magnetic attraction force continuously acts on the covering part 321 to limit the covering part 321 from opening the air inlet 312.

[0111] The magnetic member can be embedded in the first seat body 314, and the magnetic accessory can be embedded in the cover portion 321. Of course, the magnetic member and the first seat body 314 can be integrally formed, and the magnetic accessory and the valve cover 320 can also be integrally formed, which can be specifically arranged as needed.

[0112] In this embodiment, through the magnetic attraction between the magnetic member and the magnetic accessory, when the battery device is in normal use, the covering portion 321 of the valve cover 320 can continuously and stably close the air inlet 312 under the action of the magnetic attraction, so that the accommodating chamber 230 of the box body 200 is kept in a negative pressure state, so that the upper cover 220 can stably fit the battery cell 100. The magnetic member has the advantages of strong and stable magnetism, which is conducive to improving the stability of the first force provided by the limiter 330 to the valve cover 320 to continuously close the air inlet 312.

[0113] See also Figure 7 , Figure 8 and Fig.11 According to some embodiments of the present application, optionally, the valve body 300 also includes a first sealing member 340, and the valve seat 310 and / or the valve cover 320 are provided with a first mounting groove near the air inlet 312, and the first sealing member 340 is provided in the first mounting groove to seal the gap between the valve cover 320 and the valve seat 310 when the valve cover 320 closes the air inlet 312.

[0114] The first sealing member 340 may be arranged in an annular shape. The first sealing member 340 is installed in the first installation groove on the valve seat 310; or, the first sealing member 340 is installed in the first installation groove on the valve cover 320; or, when the valve cover 320 closes the air inlet 312, a portion of the first sealing member 340 is arranged in the first installation groove on the valve seat 310, and another portion of the first sealing member 340 is arranged in the first installation groove on the valve cover 320. In this arrangement, when the valve cover 320 closes the air inlet 312, the first sealing member 340 can seal the gap between the valve cover 320 and the valve seat 310.

[0115] In this embodiment, the first sealing member 340 can seal the gap between the valve cover 320 and the valve seat 310 when the valve cover 320 closes the air inlet 312 , thereby improving the sealing performance of the valve cover 320 to the air inlet 312 .

[0116] According to some embodiments of the present application, optionally, the valve body 300 also includes a second sealing member 350 , and the valve seat 310 and / or the upper cover 220 are provided with a second mounting groove near the through hole 222 , and the second sealing member 350 is provided in the second mounting groove to seal the gap between the valve seat 310 and the upper cover 220 .

[0117] The second sealing member 350 may also be arranged in an annular shape. The second sealing member 350 is installed in the second installation groove on the valve seat 310; or, the second sealing member 350 is installed in the second installation groove on the upper cover 220; or, a part of the second sealing member 350 is arranged in the second installation groove on the valve seat 310, and another part of the second sealing member 350 is arranged in the second installation groove on the upper cover 220. In this way, the second sealing member 350 can seal the gap between the valve seat 310 and the upper cover 220.

[0118] In this embodiment, by providing the second sealing member 350 , the gap between the valve seat 310 and the upper cover 220 can be sealed to ensure that the accommodating chamber 230 of the box body 200 can be maintained in a negative pressure state, so that the upper cover 220 can be stably attached to the battery cell 100 .

[0119] See also Figures 6 to 11 According to some embodiments of the present application, optionally, a mounting hole 317 is provided on the valve seat 310, and a fixing portion 241 is provided on the upper cover 220. The valve seat 310 is connected to the fixing portion 241 through a fastener 360 passing through the mounting hole 317 to fix the valve seat 310 to the upper cover 220.

[0120] The fastener 360 may be a bolt, or a clip, or other connecting member; the connecting portion may be a threaded structure, or a clip-fit ​​structure, which is not specifically limited here.

[0121] In this embodiment, the fastener 360 passes through the mounting hole 317 on the valve seat 310 and is fixedly connected to the upper cover 220, so that the valve seat 310 can be stably mounted on the upper cover 220. The fixing method of the valve seat 310 is simple and has high stability.

[0122] According to some embodiments of the present application, optionally, the upper cover 220 is provided with a fixing hole corresponding to the mounting hole 317, and the battery device 10 includes a fixing sleeve 240, which is provided at the fixing hole and sealed with the upper cover 220, and the fixing sleeve 240 is open on one side facing the mounting hole 317, and a fixing portion 241 is provided on the inner wall of the fixing sleeve 240.

[0123] The fixing sleeve 240 is fixedly connected to the upper cover 220, and the specific connection method is not limited, for example but not limited to: welding fixation, adhesive fixation, threaded connection, or clamping fixation. The fixing sleeve 240 is a hollow structure with one side open, and the fixing part 241 is arranged on the inner wall of the fixing sleeve 240. Exemplarily, the fixing sleeve 240 is a threaded sleeve.

[0124] In this embodiment, by providing a fixing hole on the upper cover 220, the fixing sleeve 240 is conveniently sealed and connected to the upper cover 220, so that the accommodating chamber 230 can be kept in a negative pressure state. The fixing sleeve 240 is opened on one side outside the accommodating chamber 230, which facilitates the processing of the fixing part 241 in the fixing sleeve 240, so that the fastener 360 is conveniently inserted into the fixing sleeve 240 and connected to the fixing part 241, thereby improving the convenience of assembly.

[0125] According to some embodiments of the present application, the present application provides a battery device 10. The battery device 10 includes at least one battery cell 100, a box body 200 and a valve body 300. The box body 200 includes a box body 210 and an upper cover 220. The upper cover 220 and the box body 210 are enclosed to form a receiving cavity 230, and the battery cell 100 is arranged in the receiving cavity 230. The upper cover 220 is provided with a reinforcement portion 221 and a through hole 222 connected to the receiving cavity 230, and the through hole 222 is provided on the reinforcement portion 221. The valve body 300 is provided at the through hole 222. The battery device 10 is used to evacuate the receiving cavity 230 through the valve body 300 so that the receiving cavity 230 is in a negative pressure state. The upper cover 220 is attached to the battery cell 100 under the action of the negative pressure. The upper cover 220 includes an integrally formed cover body 223 and a plurality of protrusions 2211, the protrusions 2211 protrude from the cover body 223 toward the side facing away from the battery cell 100, the cover body 223 and the plurality of protrusions 2211 are surrounded on the outer surface of the upper cover 220 to form a plurality of recesses 2212, the plurality of protrusions 2211 and the plurality of recesses 2212 form a reinforcing portion 221, the through hole 222 is provided on the protrusion 2211 or the recess 2212, and the cover body 223 is attached to the battery cell 100 under the action of negative pressure. The through hole 222 is provided on the recess 2212. The battery device 10 further includes a buffer 400, which is provided in the accommodating cavity 230 and between the upper cover 220 and the battery cell 100, and the buffer 400 abuts against the upper cover 220 and the battery cell 100, respectively. The valve body 300 includes a valve seat 310, a valve cover 320 and a limiter 330. The valve seat 310 is arranged at the through hole 222. The valve seat 310 has an air passage 311 and an air inlet 312 and an air outlet 313 connected to the air passage 311. The air inlet 312 is connected to the accommodating chamber 230, and the air outlet 313 is connected to the outside atmosphere. The valve cover 320 is movably arranged at the air inlet 312 to open or close the air inlet 312. The limiter 330 is arranged on the valve seat 310 and provides a first force to continuously close the air inlet 312 to the valve cover 320 to limit the valve cover 320 from opening the air inlet 312. The limiter 330 is used to open the air inlet 312 when the second force of the air pressure in the accommodating chamber 230 on the valve cover 320 is greater than the first force. The valve seat 310 includes a first seat body 314 and a second seat body 315. The first seat body 314 is arranged on the upper cover 220. The first seat body 314 has an air passage 311. An end of the first seat body 314 close to the battery cell 100 is configured with an air inlet 312. The second seat body 315 is arranged at an end of the first seat body 314 away from the battery cell 100. An air outlet 313 is configured on the second seat body 315 and / or the first seat body 314. The limiting member 330 is arranged on the first seat body 314 and / or the second seat body 315 and provides a first force to continuously close the air inlet 312 to the valve cover 320.A positioning portion 316 is provided on the second seat body 315, and the valve cover 320 includes a covering portion 321 and a guiding portion 322. The covering portion 321 is provided at the air inlet 312 for opening or closing the air inlet 312, and the guiding portion 322 is extended along the first direction, and one end of the guiding portion 322 close to the air inlet 312 is connected to the covering portion 321, and one end of the guiding portion 322 close to the air outlet 313 is slidably matched with the positioning portion 316 and can reciprocate along the first direction. The first seat body 314 includes a bottom wall 3141, a side wall 3142 and a top wall 3143 which are connected in sequence. The side wall 3142 is arranged in a ring shape and is surrounded by the bottom wall 3141 and the top wall 3143. The bottom wall 3141 is arranged in the accommodating cavity 230. The bottom wall 3141 is provided with an air inlet 312. The top wall 3143 is arranged on the upper cover 220. The second seat body 315 is connected to the top wall 3143 and / or the side wall 3142. The second seat body 315 and / or the top wall 3143 are constructed with an air outlet 313. The covering portion 321 closes the air inlet 312 under the action of negative pressure and is supported on the bottom wall 3141. The stopper 330 includes an elastic member 331, which is telescopically arranged in the air passage 311 along a first direction, one end of the elastic member 331 abuts against the second seat body 315, and the other end of the elastic member 331 abuts against the cover portion 321, and the elastic member 331 is configured to provide a thrust to the cover portion 321 to continuously close the air inlet 312. The valve body 300 also includes a first sealing member 340, and a first mounting groove is provided at the valve seat 310 and / or the valve cover 320 near the air inlet 312, and the first sealing member 340 is arranged in the first mounting groove to seal the gap between the valve cover 320 and the valve seat 310 when the valve cover 320 closes the air inlet 312. The valve body 300 further includes a second sealing member 350 . The valve seat 310 and / or the upper cover 220 are provided with a second mounting groove near the through hole 222 . The second sealing member 350 is provided in the second mounting groove to seal the gap between the valve seat 310 and the upper cover 220 .

[0126] See also Figures 6 to 11In one embodiment of the present application, the present application provides a valve body 300, the valve body 300 is used for the battery device 10 as described above, the battery device 10 includes a box body 200, the valve body 300 includes a valve seat 310, a valve cover 320 and a stopper 330, the valve seat 310 is used to be installed on the upper cover 220 of the box body 200, the valve seat 310 has an air passage 311 and an air inlet 312 and an air outlet 313 connected to the air passage 311, the air inlet 312 is used to communicate with the accommodating cavity 230 of the box body 200, and the air outlet 313 is connected to the outside atmosphere; the valve cover 320 can be movably arranged at the air inlet 312 to open Open or close the air inlet 312; the limiter 330 is arranged on the valve seat 310 and provides a first force to the valve cover 320 to continuously close the air inlet 312, so as to limit the valve cover 320 from opening the air inlet 312; the battery device 10 is used to evacuate the accommodating chamber 230 of the box body 200 through the valve body 300 so that the accommodating chamber 230 is in a negative pressure state, and the upper cover 220 of the box body 200 is attached to the battery cell 100 in the box body 200 under the action of the negative pressure; the limiter 330 is used to open the air inlet 312 when the second force of the air pressure in the accommodating chamber 230 of the box body 200 on the valve cover 320 is greater than the first force.

[0127] In this embodiment, the valve body 300 is applied to the battery device 10, and the valve body 300 includes a valve seat 310, a valve cover 320 and a limiter 330. The air inlet 312 on the valve seat 310 is connected to the accommodating cavity 230 of the box body 200, and the air outlet 313 of the valve seat 310 is connected to the outside atmosphere. The limiter 330 provides a first force to continuously close the air inlet 312 to limit the valve cover 320 from opening the air inlet 312, so that the battery device 10 can maintain a negative pressure state in the box body 200 during normal use, thereby ensuring that the upper cover 220 can fit the battery cell 100 under the action of negative pressure. When the battery device 10 is in thermal runaway, the second force exerted by the air pressure in the box 200 on the valve cover 320 is greater than the first force exerted by the limiter 330 on the valve cover 320, so that the valve cover 320 opens the air inlet 312 to allow the air pressure in the box 200 to escape from the air inlet 312, thereby improving the safety of the battery device 10.

[0128] In addition, the battery device 10 is used to evacuate the accommodating chamber 230 through the valve body 300 so that the accommodating chamber 230 is in a negative pressure state, and the box body 200 is in a negative pressure state, so that there is a pressure difference between the inside and outside of the box body 200, and the upper cover 220 is attached to the battery cell 100 under the action of the negative pressure, so that the upper cover 220 can be closely attached to the battery cell 100, avoiding the situation that the upper cover 220 is easily prone to abnormal noise due to the suspension between the upper cover 220 and the battery cell 100. At the same time, the upper cover 220 is tightly wrapped on the battery cell 100, so that the box body 210, the upper cover 220 and the battery cell 100 can jointly bear the structural strength, thereby improving the overall structural strength of the battery device 10.

[0129] The present application also proposes an electrical device, which includes a battery device. The specific structure of the battery device refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the battery device is used to store or provide electrical energy. The electrical device can be an electric car, an electric motorcycle, an electric bicycle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present 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. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device, characterized in that: include: at least one battery cell; A box body, comprising a box body and an upper cover, wherein the upper cover and the box body are enclosed to form a receiving cavity, the battery cell is arranged in the receiving cavity, the upper cover is provided with a reinforcement part and a through hole communicating with the receiving cavity, and the through hole is arranged on the reinforcement part; The valve body is arranged at the through hole. The battery device is used to evacuate the accommodating cavity through the valve body to make the accommodating cavity present a negative pressure state. The upper cover is attached to the battery cell under the action of the negative pressure.

2. The battery device according to claim 1, characterized in that: The upper cover includes an integrally formed cover body and a plurality of protrusions, wherein the protrusions protrude from the cover body toward a side facing away from the battery cell, and the cover body and the plurality of protrusions are arranged on an outer surface of the upper cover to form a plurality of recesses, and the plurality of protrusions and the plurality of recesses form the reinforcement portion, and the through holes are arranged on the protrusions or the recesses, and the cover body is attached to the battery cell under the action of negative pressure.

3. The battery device according to claim 2, characterized in that: The through hole is provided on the recess; And / or, the depth of the recess is H, and H is not less than 1 mm and not more than 3 mm.

4. The battery device according to claim 1, characterized in that: The battery device further includes a buffer member, which is disposed in the accommodating cavity and located between the upper cover and the battery cell. The buffer member abuts against the upper cover and the battery cell respectively.

5. The battery device according to any one of claims 1 to 4, characterized in that: The valve body comprises: A valve seat, the valve seat is arranged at the through hole, the valve seat has an air passage and an air inlet and an air outlet communicated with the air passage, the air inlet is communicated with the accommodating cavity, and the air outlet is communicated with the outside atmosphere; A valve cover is movably disposed at the air inlet to open or close the air inlet; A limit member is provided on the valve seat and provides a first force to the valve cover to continuously close the air inlet, so as to limit the valve cover from opening the air inlet; the limit member is used to open the air inlet when a second force exerted by the air pressure in the accommodating cavity on the valve cover is greater than the first force.

6. The battery device according to claim 5, characterized in that: The valve seat includes a first seat body and a second seat body, the first seat body is arranged on the upper cover, the first seat body has the air passage, the first seat body is provided with the air inlet at one end close to the battery cell, the second seat body is provided at one end of the first seat body away from the battery cell, the air outlet is provided on the second seat body and / or the first seat body, the limiting member is provided on the first seat body and / or the second seat body and provides the first force to the valve cover to continuously close the air inlet.

7. The battery device according to claim 6, characterized in that: A positioning portion is provided on the second seat body, and the valve cover includes a covering portion and a guiding portion. The covering portion is provided at the air inlet for opening or closing the air inlet, and the guiding portion is extended along a first direction, and one end of the guiding portion close to the air inlet is connected to the covering portion, and one end of the guiding portion close to the air outlet is slidably matched with the positioning portion and can reciprocate along the first direction.

8. The battery device according to claim 7, characterized in that: The positioning portion is configured as a positioning hole penetrating along the first direction, and one end of the guide portion close to the air outlet is inserted into the positioning hole so as to be reciprocally movable along the first direction.

9. The battery device according to claim 8, characterized in that: The second base body is connected to the first base body, and a plurality of the air outlets are arranged on the second base body. The plurality of the air outlets are arranged around the circumference of the positioning hole.

10. The battery device according to claim 7, characterized in that: The first seat body includes a bottom wall, a side wall and a top wall connected in sequence, the side wall is arranged in a ring shape and surrounded by the bottom wall and the top wall, the bottom wall is arranged in the accommodating cavity, the bottom wall is provided with the air inlet, the top wall is arranged on the upper cover, the second seat body is connected to the top wall and / or the side wall, the second seat body and / or the top wall are constructed with the air outlet, and the covering portion closes the air inlet under the action of negative pressure and is carried on the bottom wall.

11. The battery device according to claim 7, characterized in that: The limiting member includes an elastic member, which is telescopically arranged in the air passage along the first direction, one end of the elastic member abuts against the second seat body, and the other end of the elastic member abuts against the covering portion, and the elastic member is configured to provide a thrust to the covering portion to continuously close the air inlet.

12. The battery device according to claim 11, characterized in that The elastic member is configured as a spring, and the spring is sleeved on the guide portion.

13. The battery device according to claim 7, characterized in that: The limiting member includes a magnetic member and a magnetic accessory that magnetically cooperates with the magnetic member. One of the magnetic member and the magnetic accessory is arranged on the first seat body at the air inlet, and the other is arranged on the covering part. The covering part is configured to close the air inlet under the action of the magnetic force of the magnetic member and the magnetic accessory.

14. The battery device according to claim 5, characterized in that: The valve body further comprises a first sealing member, the valve seat and / or the valve cover is provided with a first mounting groove near the air inlet, and the first sealing member is provided in the first mounting groove to seal the gap between the valve cover and the valve seat when the valve cover closes the air inlet; And / or, the valve body further includes a second sealing member, the valve seat and / or the upper cover is provided with a second mounting groove near the through hole, and the second sealing member is provided in the second mounting groove to seal the gap between the valve seat and the upper cover.

15. The battery device according to claim 14, characterized in that: The valve seat is provided with a mounting hole, the upper cover is provided with a fixing portion, and the valve seat is connected to the fixing portion through a fastener passing through the mounting hole, so as to fix the valve seat and the upper cover.

16. The battery device according to claim 15, characterized in that The upper cover is provided with a fixing hole corresponding to the mounting hole, the battery device comprises a fixing sleeve, the fixing sleeve is arranged at the fixing hole and is sealed with the upper cover, the fixing sleeve is opened on one side facing the mounting hole, and the fixing portion is provided on the inner wall of the fixing sleeve.

17. An electrical device, characterized in that: The battery device comprises a battery device as claimed in any one of claims 1 to 16, wherein the battery device is used to store or provide electrical energy.

18. A valve body, used for a battery device according to any one of claims 5 to 16, the battery device comprising a box, characterized in that: The valve body includes: A valve seat, used for being installed on the upper cover of the box body, the valve seat having an air passage and an air inlet and an air outlet communicated with the air passage, the air inlet being used for being communicated with the accommodating cavity of the box body, and the air outlet being communicated with the outside atmosphere; A valve cover is movably disposed at the air inlet to open or close the air inlet; A limiter is provided on the valve seat and provides a first force to the valve cover for continuously closing the air inlet, so as to limit the valve cover from opening the air inlet; the battery device is used to evacuate the accommodating chamber of the box body through the valve body so that the accommodating chamber is in a negative pressure state, and the upper cover of the box body is attached to the battery cell in the box body under the action of the negative pressure; the limiter is used to open the air inlet when the second force of the air pressure in the accommodating chamber of the box body on the valve cover is greater than the first force.

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