Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises a battery monomer and a cover body, the battery monomer is provided with an exhaust port, the cover body is arranged on the battery monomer, the exhaust port is located in the cover body, the cover body can move along a first direction relative to the battery monomer, so that the exhaust port is communicated with the outside, and the first direction is a gas outflow direction in the exhaust port. According to the scheme provided by the invention, automatic exhaust can be realized in the whole process, and the cover body can be reused, so that the cost is effectively saved. When the whole device is installed, only the cover body needs to be placed at the exhaust port of the single battery, the installation process is simple and convenient, and the installation efficiency is effectively improved.

Description

Technical Field

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

[0002] Lithium batteries will generate gas when they are subjected to high temperature, overcharge, over discharge, or other tests that damage the battery. In order to facilitate the discharge of gas generated inside the lithium battery to the outside, an exhaust valve is generally installed on the lithium battery.

[0003] The exhaust valve in the related art has a complicated installation process when in use. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device, which can solve the problem of complicated installation process when the exhaust valve is in use.

[0005] In order to solve the above technical problems, in a first aspect, the present application proposes a battery device, comprising:

[0006] A battery cell, wherein the battery cell is provided with an exhaust port;

[0007] The cover body is arranged on the battery cell, the exhaust port is located in the cover body, and the cover body can move relative to the battery cell along a first direction so that the exhaust port is connected with the outside, wherein the first direction is the direction in which the gas in the exhaust port flows out.

[0008] In the technical solution of the embodiment of the present application, when the battery cell is working normally, the cover blocks the exhaust port, and the exhaust port will not be connected to the outside, thereby preventing debris from entering the battery cell; when the battery cell has thermal runaway, the gas generated in the battery cell flows from the exhaust port into the cover, and the exhausted gas acts on the inside of the cover to make the cover move relative to the battery cell, thereby making the exhaust port connected to the outside. At this time, the exhausted gas can flow to the outside, thereby preventing the battery cell from bulging. The overall process can realize automatic exhaust, and the cover can be reused, effectively saving costs. When installing the overall device, you only need to place the cover at the exhaust port on the battery cell. The installation process is simple and convenient, which effectively improves the installation efficiency.

[0009] In some embodiments, the battery device further comprises a limit seat, the limit seat is arranged on the battery cell; the interior of the limit seat is a hollow structure, and the exhaust port is connected to the interior of the limit seat;

[0010] The cover is connected to the limiting seat, and the cover can move relative to the limiting seat along the first direction so that the exhaust port is connected to the outside. In this way, the cover can be conveniently connected to the battery cell through the limiting seat connected to the battery cell.

[0011] In some embodiments, the cover body is provided with a first opening on one side facing the battery cell, and the limiting seat is provided with a second opening and a third opening on two opposite sides along the first direction;

[0012] The cover body is at least partially located in the limiting seat, a gap exists between the side surface of the cover body and the second opening, and the exhaust port is connected with the interior of the cover body through the third opening and the first opening.

[0013] In some embodiments, a protrusion is provided on the side of the cover body, and a stopper is provided on the top surface of the inner part of the limit seat;

[0014] When the cover moves to a preset position relative to the limiting seat along the first direction, the protrusion abuts against the stopper, and the cover is blocked from moving along the first direction, thereby preventing the cover from falling off the limiting seat.

[0015] In some embodiments, the battery device further comprises a sealing ring, which is arranged between the cover body and the inner bottom surface of the limiting seat, so as to ensure the sealing between the cover body and the inner bottom surface of the limiting seat.

[0016] In some embodiments, the limiting seat is detachably connected to the battery cell, so that it is easy to remove the limiting seat from the battery cell.

[0017] In some embodiments, the cover body includes a plurality of arc segments, each of which extends along the first direction, and two adjacent arc segments are detachably connected around the circumference. In this way, the size of the cover body can be conveniently adjusted by increasing or decreasing the number of arc segments.

[0018] In some embodiments, the arc segment is provided with a clamping block and a clamping groove on both sides of the arc segment in the circumferential direction, so as to facilitate the connection or disassembly between two adjacent arc segments.

[0019] In a second aspect, the present application proposes a battery device, comprising:

[0020] A battery cell, wherein the battery cell is provided with an exhaust port;

[0021] The cover body is detachably connected to the battery cell, the side of the cover body away from the battery cell is an opening structure, a cover plate is arranged on the cover body, the cover plate can be opened or closed relative to the opening structure, and the exhaust port is located in the cover body.

[0022] In the technical solution of the embodiment of the present application, when the battery cell is working normally, the cover is connected to the battery cell and the cover is closed. At this time, the exhaust port will not be connected to the outside, preventing debris from entering the battery cell; when the battery cell has thermal runaway, the gas generated in the battery cell flows from the exhaust port into the cover, and the exhausted gas acts on the inside of the cover, so that the cover on the cover opens, thereby connecting the exhaust port to the outside. At this time, the exhausted gas can flow to the outside, thereby preventing the battery cell from bulging. The overall process can realize automatic exhaust, and the cover can be reused, effectively saving costs. When installing the overall device, it only needs to detachably connect the cover to the exhaust port on the battery cell. The installation process is simple and convenient, which effectively improves the installation efficiency.

[0023] In some embodiments, a connecting section is provided on the side of the cover body facing the battery cell, and a threaded section is provided on the battery cell, and the threaded section cooperates with the connecting section. In this way, by rotating the connecting section on the cover body so that the connecting section and the threaded section are connected together, the cover body can be quickly installed on the battery cell.

[0024] In a third aspect, the present application proposes an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[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] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0027] Figure 1 A schematic diagram of the structure of an electric device provided in some embodiments of the present application;

[0028] Figure 2 A schematic diagram of the structure of a battery provided in some embodiments of the present application;

[0029] Figure 3 A schematic diagram of the structure of a battery cell provided in some embodiments of the present application;

[0030] Figure 4 A schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0031] Figure 5 Bit Figure 4 The enlarged schematic diagram of point A in the middle;

[0032] Figure 6 A schematic diagram of a battery device provided in some embodiments of the present application during exhaust;

[0033] Figure 7 Another schematic diagram of a battery device provided in some embodiments of the present application during exhaust;

[0034] Figure 8 Bit Figure 7 The enlarged schematic diagram of point B in the middle;

[0035] Fig. 9 A schematic diagram of a battery device after exhaust provided in some embodiments of the present application;

[0036] Fig.10 A schematic diagram of a limit seat provided for some embodiments of the present application;

[0037] Fig.11 A schematic diagram of a cover body provided in some embodiments of the present application being away from a limiting seat;

[0038] Fig.12 A schematic diagram of a cover provided for some embodiments of the present application;

[0039] Fig.13 Schematic diagram of arc segments provided for some embodiments of the present application;

[0040] Fig.14 Another schematic diagram of a battery device provided in some embodiments of the present application;

[0041] Fig.15 for Fig.14 Enlarged schematic diagram of point C in the middle.

[0042] The reference numerals in the specific implementation manner are as follows:

[0043] 1000. Vehicles;

[0044] 100, battery; 200, controller; 300, motor;

[0045] 110, box body; 111, first part; 112, second part; 120, battery cell group; 121, shell; 122, end cover; 123, electrode assembly;

[0046] 10. Battery cell; 101. Exhaust port; 11. Cover body; 113. First opening; 114. Protrusion; 115. Connecting section; 116. Cover plate; 117. Arc section; 118. Block; 12. Limiting seat; 124. Second opening; 125. Third opening; 126. Stopper. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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).

[0053] 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.

[0054] 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.

[0055] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0056] Compared with lead-acid batteries, nickel-metal hydride batteries, and nickel-cadmium batteries, lithium batteries have the advantages of high energy density and long cycle life, so they are widely used as power sources for electrical devices. During the storage or circulation of lithium batteries, the electrolyte will inevitably react with the positive electrode active material and produce gas. As the requirements for the volume energy density of lithium batteries become higher and higher, the volume of the internal design of the battery is getting smaller and smaller. When a small amount of gas is generated inside the battery, the internal pressure of the battery will increase sharply. Excessive internal pressure of the battery will cause the battery shell to deform or even rupture, which will bring safety hazards.

[0057] In order to facilitate the discharge of gas generated inside the lithium battery to the outside, an exhaust valve is generally installed on the lithium battery. When installing the exhaust valve in the related art, it is connected to the lithium battery through a connecting pipe, and then a sealant is set between the connecting pipe and the outside of the lithium battery, and then a one-way exhaust valve is installed outside the connecting pipe, and finally a pressure relief device is installed on the one-way exhaust valve. The overall installation process is complicated, which affects the installation efficiency.

[0058] Based on the above considerations, in order to solve the problem of complicated installation process of the exhaust valve when in use, a battery device is designed, which includes a battery cell and a cover body, wherein an exhaust port is provided on the battery cell; the cover body is provided in the battery cell, and the exhaust port is located in the cover body, and the cover body can move relative to the battery cell along a first direction so that the exhaust port is connected to the outside, wherein the first direction is the direction in which gas flows out of the exhaust port.

[0059] During use, when the battery cell is working normally, the cover blocks the exhaust port, and the exhaust port will not be connected to the outside, preventing debris from entering the battery cell; when the battery cell has thermal runaway, the gas generated in the battery cell flows from the exhaust port into the cover, and the exhausted gas acts on the inside of the cover to make the cover move relative to the battery cell, so that the exhaust port is connected to the outside. At this time, the exhausted gas can flow to the outside, thereby preventing the battery cell from bulging. The overall process can realize automatic exhaust, and the cover can be reused, effectively saving costs. When installing the overall device, you only need to place the cover at the exhaust port on the battery cell. The installation process is simple and convenient, which effectively improves the installation efficiency.

[0060] The battery in this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. The battery can be used as a power source or power system for an electrical device, which is conducive to improving the overall performance of the battery and facilitating the promotion of the battery.

[0061] The above-mentioned electrical devices may be, but are not limited to, mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, etc.

[0062] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0063] Please refer to Figure 1The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0064] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0065] Please refer to Figure 2 The battery 100 includes a box body 110 and a battery cell group 120, and the battery cell group 120 is accommodated in the box body 110. The box body 110 is used to provide a storage space for the battery cell group 120, and the box body 110 can adopt a variety of structures. In some embodiments, the box body 110 may include a first part 111 and a second part 112, and the first part 111 and the second part 112 cover each other, and the first part 111 and the second part 112 jointly define a storage space for accommodating the battery cell group 120. The second part 112 may be a hollow structure with one end open, and the first part 111 may be a plate-like structure, and the first part 111 covers the open side of the second part 112, so that the first part 111 and the second part 112 jointly define a storage space; the first part 111 and the second part 112 may also be hollow structures with one side open, and the open side of the first part 111 covers the open side of the second part 112. Of course, the box body 110 formed by the first part 111 and the second part 112 can be in various shapes, such as a cylinder, a cuboid, etc.

[0066] In the battery 100, there may be multiple battery cell groups 120, and the multiple battery cell groups 120 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cell groups 120 are both connected in series and in parallel. The multiple battery cell groups 120 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cell groups 120 is accommodated in the box 110; of course, the battery 100 may also be a battery module formed by connecting multiple battery cell groups 120 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 accommodated in the box 110. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cell groups 120.

[0067] Each battery cell group 120 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 group 120 may be cylindrical, flat, rectangular, or in other shapes.

[0068] like Figure 3 As shown, the battery cell group 120 may include a housing, an electrode assembly 123 and electrode terminals. The housing includes a shell 121 and an end cap 122. The shell 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell group 120 from the external environment.

[0069] The shell 121 is a component used to cooperate with the end cap 122 to form the internal environment of the battery cell group 120, wherein the formed internal environment can be used to accommodate the electrode assembly 123, the electrolyte and other components. The shell 121 and the end cap 122 can be independent components. The shell 121 can be of various shapes and sizes. Specifically, the shape of the shell 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0070] The end cap 122 refers to a component that covers the opening of the shell 121 to isolate the internal environment of the battery cell group 120 from the external environment. Without limitation, the shape of the end cap 122 can be adapted to the shape of the shell 121 to match the shell 121. Optionally, the end cap 122 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 122 is not easily deformed when squeezed and collided, so that the battery cell group 120 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals can be provided on the end cap 122. The electrode terminal can be used to electrically connect to the electrode assembly 123 for outputting or inputting electrical energy of the battery cell group 120. The material of the end cap 122 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating structure may be provided inside the end cap 122, and the insulating structure may be used to isolate the electrical connection components in the housing 121 from the end cap 122 to reduce the risk of short circuit. For example, the insulating structure may be plastic, rubber, or the like.

[0071] The electrode assembly 123 is a component in the battery cell group 120 where an electrochemical reaction occurs. One or more electrode assemblies 123 may be included in the housing 121. The electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet, and the separator is used to separate the positive electrode sheet and the negative electrode sheet to avoid short circuits between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 123, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute the pole ear. The positive pole ear and the negative pole ear may be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the pole ear connects the electrode terminal to form a current loop. In addition, the electrode assembly 123 may be a winding structure or a laminated structure.

[0072] In some embodiments, the battery cell group 120 may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell group 120 reaches a threshold value.

[0073] According to some embodiments of the present application, Figure 4 is a schematic diagram of the structure of the battery device in this application, Figure 5 Bit Figure 4 The enlarged schematic diagram of point A in the middle. Figure 6 is a schematic diagram of the battery device in this application during exhaust, Figure 7 This is another schematic diagram of the battery device in this application when exhausting. Figure 8 Bit Figure 7 The enlarged schematic diagram of point B in the middle, Fig. 9 Schematic diagram of the battery device after exhaust in this application. Figure 4-Figure 9 As shown, the present application provides a battery device, which includes a battery cell 10 and a cover body 11, wherein an exhaust port 101 is provided on the battery cell 10, the cover body 11 is provided on the battery cell 10, the exhaust port 101 is located inside the cover body 11, and the cover body 11 can move relative to the battery cell 10 along a first direction so that the exhaust port 101 is connected to the outside, wherein the first direction is the direction in which gas in the exhaust port 101 flows out.

[0074] The first direction in this embodiment can refer to Figure 5 The X-axis direction.

[0075] The exhaust port 101 in this embodiment is disposed on the upper side of the battery cell 10. Of course, it is understandable that the exhaust port 101 can also be disposed on the left side, right side, etc. of the battery cell 10. The specific location can be determined based on actual conditions, and this specification embodiment does not limit this.

[0076] refer to Figure 4As shown, the cover 11 has an open structure on one side facing the battery cell 10, and the other side of the cover 11 is a closed structure. When the cover 11 is installed on the battery cell 10, the opening of the cover 11 is in close contact with the surface of the battery cell 10, and the exhaust port 101 is located inside the cover 11.

[0077] When the battery cell 10 is working normally, the opening of the cover 11 is in close contact with the surface of the battery cell 10, and the exhaust port 101 is located inside the cover 11. At this time, the cover 11 and the battery cell 10 are sealed. When the battery cell 10 has thermal runaway, the internal air pressure of the battery cell 10 rises. When the air pressure P reaches a threshold value, where P=M / S, M is the weight of the cover 11, and S is the area of ​​the exhaust port 101, when the internal pressure of the battery cell 10 P0>P, the gas will blow the cover 11 up in the first direction. At this time, Figure 8 As shown, the exhaust port 101 is connected to the outside, so that the generated gas can be discharged to the outside to achieve the purpose of pressure relief and exhaust. Fig. 9 As shown, when P0<P, the cover body 11 will descend relative to the battery cell 10 until the cover body 11 contacts the battery cell 10. At this time, the cover body 11 returns to the initial state to achieve a sealing effect.

[0078] In the technical solution of the embodiment of the present application, when the battery cell 10 is working normally, the cover 11 blocks the exhaust port 101, and the exhaust port 101 will not be connected to the outside, so as to prevent debris from entering the battery cell 10; when the battery cell 10 has thermal runaway, the gas generated in the battery cell 10 flows from the exhaust port 101 to the cover 11, and the exhausted gas acts on the inside of the cover 11, so that the cover 11 moves relative to the battery cell 10, so that the exhaust port 101 is connected to the outside, and at this time, the exhausted gas can flow to the outside, so as to prevent the battery cell 10 from inflating and expanding. The overall process can realize automatic exhaust, and the cover 11 can be reused, which effectively saves costs. When installing the overall device, it is only necessary to place the cover 11 at the exhaust port 101 on the battery cell 10. The installation process is simple and convenient, which effectively improves the installation efficiency.

[0079] According to some embodiments of the present application, Fig.10 As shown, the battery device also includes a limit seat 12, which is arranged on the battery cell 10; the interior of the limit seat 12 is a hollow structure, and the exhaust port 101 is connected to the interior of the limit seat 12; the cover body 11 is connected to the limit seat 12, and the cover body 11 can move relative to the limit seat 12 along the first direction so that the exhaust port 101 is connected to the outside.

[0080] In this embodiment, the limiting seat 12 can be connected to the battery cell 10 by bolts, or the limiting seat 12 can be welded to the battery cell 10. The specific method can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0081] The first direction in this embodiment can refer to Fig.10 The X-axis direction.

[0082] refer to Fig.10 As shown, in this embodiment, a first opening 113 is provided on the lower side of the cover body 11, and the other sides of the cover body 11 are closed structures. The cover body 11 can be completely located in the limiting seat 12, or a part of the cover body 11 is located in the limiting seat 12, and the other part is located above the limiting seat 12. When the cover body 11 is located in the limiting seat 12, there is a gap between the cover body 11 and the inner wall of the limiting seat 12.

[0083] The interior of the limiting seat 12 is a hollow structure as a whole, a second opening 124 is provided on the upper side of the limiting seat 12, and a third opening 125 is provided on the lower side of the limiting seat 12, wherein the inner diameter D1 of the second opening 124 is greater than the outer diameter D2 of the cover body 11, that is, there is a gap between the outer side of the cover body 11 along the direction perpendicular to the X-axis and the second opening 124. When the cover body 11 is connected to the limiting seat 12, the cover body 11 can move relative to the limiting seat 12 along the X-axis direction.

[0084] When the battery cell 10 is working normally, one side of the cover body 11 located at the first opening 113 is in close contact with the inner bottom surface of the limiting seat 12. At this time, the exhaust port 101 is connected to the inside of the cover body 11 through the third opening 125 and the first opening 113. When the cover body 11 is in close contact with the inner bottom surface of the limiting seat 12, the exhaust port 101 will not be connected to the outside.

[0085] When thermal runaway occurs in the battery cell 10, the gas generated in the battery cell 10 flows from the exhaust port 101 through the third opening 125 and the first opening 113 into the cover 11, and the exhausted gas acts on the inside of the cover 11, so that the cover 11 is away from the bottom surface of the inner part of the limit seat 12. Fig.10 In the direction of the arrow inside the middle limit seat 12, the gas discharged from the exhaust port 101 will flow to the outside through the third opening 125, the inside of the limit seat 12, and the gap between the cover body 11 and the second opening 124, thereby preventing the battery cell 10 from expanding. Referring to the above description, when P0<P, the cover body 11 will drop relative to the limit seat 12 until the cover body 11 contacts the bottom surface inside the limit seat 12. At this time, the cover body 11 returns to the initial state to achieve a sealing effect.

[0086] In this embodiment, the limiting seat 12 is directly fixed to the battery cell 10 , and then the cover body 11 is connected to the limiting seat 12 , so that the cover body 11 can be connected to the battery cell 10 .

[0087] According to some embodiments of the present application, Fig.10As shown, the cover body 11 is provided with a first opening 113 on one side facing the battery cell 10, and the limiting seat 12 is provided with a second opening 124 and a third opening 125 on two opposite sides along the first direction;

[0088] The cover body 11 is at least partially located in the limiting seat 12 , and there is a gap between the side of the cover body 11 and the second opening 124 . The exhaust port 101 is connected to the interior of the cover body 11 through the third opening 125 and the first opening 113 .

[0089] refer to Fig.10 As shown, in this embodiment, a first opening 113 is provided on the lower side of the cover body 11, and the other sides of the cover body 11 are closed structures. The cover body 11 can be completely located in the limiting seat 12, or a part of the cover body 11 is located in the limiting seat 12, and the other part is located above the limiting seat 12. When the cover body 11 is located in the limiting seat 12, there is a gap between the cover body 11 and the inner wall of the limiting seat 12.

[0090] A second opening 124 is provided on the upper side of the limiting seat 12, and a third opening 125 is provided on the lower side of the limiting seat 12, wherein the inner diameter D1 of the second opening 124 is greater than the outer diameter D2 of the cover body 11, that is, there is a gap between the outer side of the cover body 11 along the direction perpendicular to the X-axis and the second opening 124. When the cover body 11 is connected to the limiting seat 12, the cover body 11 can move relative to the limiting seat 12 along the X-axis direction.

[0091] When the battery cell 10 is working normally, one side of the cover body 11 located at the first opening 113 is in close contact with the inner bottom surface of the limiting seat 12. At this time, the exhaust port 101 is connected to the inside of the cover body 11 through the third opening 125 and the first opening 113. When the cover body 11 is in close contact with the inner bottom surface of the limiting seat 12, the exhaust port 101 will not be connected to the outside.

[0092] When thermal runaway occurs in the battery cell 10, the gas generated in the battery cell 10 flows from the exhaust port 101 through the third opening 125 and the first opening 113 into the cover 11, and the exhausted gas acts on the inside of the cover 11, so that the cover 11 is away from the bottom surface of the inner part of the limit seat 12. Fig.10 In the direction of the arrow inside the middle limit seat 12, the gas discharged from the exhaust port 101 will flow to the outside through the third opening 125, the inside of the limit seat 12, and the gap between the cover body 11 and the second opening 124, thereby preventing the battery cell 10 from expanding. Referring to the above description, when P0<P, the cover body 11 will drop relative to the limit seat 12 until the cover body 11 contacts the bottom surface inside the limit seat 12. At this time, the cover body 11 returns to the initial state to achieve a sealing effect.

[0093] According to some embodiments of the present application, Fig.10As shown, a protrusion 114 is provided on the side of the cover body 11, and a stopper 126 is provided on the top surface of the inner part of the limit seat 12; when the cover body 11 moves to a preset position along the first direction relative to the limit seat 12, the protrusion 114 abuts against the stopper 126, and the cover body 11 is prevented from moving along the first direction.

[0094] like Fig.11 As shown, in this embodiment, a protrusion 114 is provided on the side surface of the cover body 11 intersecting with the X-axis. The protrusion 114 can be integrally formed with the cover body 11 . At the same time, a stopper 126 is provided on the left side of the top surface inside the limiting seat 12 .

[0095] When the battery cell 10 has thermal runaway, the gas generated in the battery cell 10 flows from the exhaust port 101 through the third opening 125 and the first opening 113 into the cover 11, and the exhausted gas acts on the inside of the cover 11, so that the cover 11 moves away from the bottom surface of the inner part of the limit seat 12. When the protrusion 114 abuts against the stopper 126, the cover 11 can no longer move upward, and at this time, the cover 11 can be prevented from falling off from the limit seat 12.

[0096] When the protrusion 114 abuts against the stopper 126, Fig.11 As shown, the right side portion of the second opening 124 on the limiting seat 12 is still in a through state, and at this time, the gas can flow from the right side portion to the outside.

[0097] According to some embodiments of the present application, the battery device further includes a sealing ring (not shown in the figure), which is disposed between the cover body 11 and the inner bottom surface of the limiting seat 12 .

[0098] The sealing ring in this embodiment is fixed on the inner bottom surface of the limiting seat 12. When the battery cell 10 is working normally, one side of the cover body 11 located at the first opening 113 is tightly attached to the inner bottom surface of the limiting seat 12 through the sealing ring. In this way, the sealing between the cover body 11 and the inner bottom surface of the limiting seat 12 can be ensured.

[0099] According to some embodiments of the present application, the limiting seat 12 is detachably connected to the battery cell 10 .

[0100] The limiting seat 12 in this embodiment can be connected to the battery cell 10 by means of bolts, clamping, etc. Since the limiting seat 12 is detachable relative to the battery cell 10, it is convenient to replace the limiting seat 12.

[0101] According to some embodiments of the present application, Fig.12 Combined with Fig.13 As shown, the cover body 11 includes a plurality of arc segments 117 , each arc segment 117 extends along a first direction, and two adjacent arc segments 117 are detachably connected around the circumference.

[0102] In this embodiment, each arc segment 117 extends along the X-axis direction, and each arc segment 117 can be formed of rubber, thermoplastic elastomer, etc. Two adjacent arc segments 117 can be connected together by bonding, bolts, etc. When in use, the size of the cover body 11 can be conveniently adjusted by increasing or decreasing the number of arc segments 117.

[0103] When multiple arc segments 117 are connected together around the circumference, an annular structure is formed. At this time, a baffle is bonded on one side of the annular structure along the axial direction, and the other side remains an open structure. At this time, the overall structure of the cover body 11 can be formed.

[0104] According to some embodiments of the present application, Fig.13 As shown, the arc segment 117 is provided with a clamping block 118 and a clamping groove on both sides around the circumference.

[0105] When two adjacent arc segments 117 are connected around the circumference, it is only necessary to insert the clamping block 118 into the corresponding clamping slot. In this way, the two adjacent arc segments 117 can be conveniently connected or disassembled.

[0106] like Fig.14 Combined with Fig.15 As shown, the present application also provides a battery device, which includes a battery cell 10 and a cover body 11, wherein an exhaust port 101 is provided on the battery cell 10; the cover body 11 is detachably connected to the battery cell 10, and a side of the cover body 11 away from the battery cell 10 is an opening structure, and a cover plate 116 is provided on the cover body 11, and the cover plate 116 can be opened or closed relative to the opening structure, and the exhaust port 101 is located inside the cover body 11.

[0107] In this embodiment, the cover body 11 and the battery cell 10 can be integrally formed, or the cover body 11 can be welded to the battery cell 10 . The specific details can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0108] When the cover 11 is fixed to the battery cell 10 , the exhaust port 101 on the battery cell 10 is located inside the cover 11 .

[0109] In this embodiment, the cover plate 116 can be connected to the cover body 11 through a pin, a hinge, etc. The specific connection can be determined according to actual conditions, and this embodiment of the specification does not limit this.

[0110] When the battery cell 10 works normally, the cover plate 116 is closed. At this time, the cover body 11 and the battery cell 10 form a closed structure as a whole, and the exhaust port 101 is not connected to the outside, so as to prevent debris from entering the battery cell 10.

[0111] When the battery cell 10 has thermal runaway, the gas generated in the battery cell 10 flows from the exhaust port 101 into the cover 11, and the exhausted gas acts on the inside of the cover 11. Fig.15 As shown, the airflow in the cover body 11 pushes the cover plate 116 from bottom to top, so that the cover plate 116 is opened, so that the exhaust port 101 is connected to the outside, and the exhausted gas can flow to the outside, thereby preventing the battery cell 10 from bulging. After the gas is exhausted, an external force can be applied to the cover plate 116 to make the cover plate 116 snap onto the cover body 11 again.

[0112] The whole process can realize automatic exhaust, and the cover body 11 can be reused, which effectively saves costs. When installing the whole device, it only needs to detachably connect the cover body 11 to the exhaust port 101 on the battery cell 10. The installation process is simple and convenient, which effectively improves the installation efficiency.

[0113] According to some embodiments of the present application, Fig.15 As shown, a connecting section 115 is provided on the side of the cover body 11 facing the battery cell 10 , and a threaded section is provided on the battery cell 10 , and the threaded section cooperates with the connecting section 115 .

[0114] In this embodiment, an external thread is provided on the connecting section 115 , and an internal thread is provided on the threaded section on the battery cell 10 , so that the cover body 11 can be quickly fixed to the battery cell 10 by rotating the cover body 11 .

[0115] The present application also provides an electrical device, comprising a battery device as described in any one of the embodiments of the present application.

[0116] The specific structure of the battery device in this embodiment refers to the above embodiment. Since all the technical solutions of all the above embodiments are adopted in this electrical device, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0117] 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: A battery cell, wherein the battery cell is provided with an exhaust port; A cover, wherein the cover is disposed on the battery cell, the exhaust port is located in the cover, and the cover can move relative to the battery cell along a first direction so that the exhaust port is connected to the outside, wherein the first direction is the gas outflow direction of the exhaust port; A limit seat, the limit seat is arranged on the battery cell; the interior of the limit seat is a hollow structure, and the exhaust port is connected to the interior of the limit seat; The cover body is connected to the limiting seat, and the cover body can move relative to the limiting seat along the first direction so that the exhaust port is connected to the outside.

2. The battery device according to claim 1, characterized in that: The cover body is provided with a first opening on one side facing the battery cell, and the limiting seat is provided with a second opening and a third opening on two opposite sides along the first direction; The cover body is at least partially located in the limiting seat, a gap exists between the side surface of the cover body and the second opening, and the exhaust port is connected with the interior of the cover body through the third opening and the first opening.

3. The battery device according to claim 2, characterized in that: The side surface of the cover body is provided with a protrusion, and the inner top surface of the limit seat is provided with a stopper; When the cover body moves to a preset position relative to the limiting seat along the first direction, the protrusion abuts against the stopper, and the cover body is blocked from moving along the first direction.

4. The battery device according to claim 2, characterized in that: The battery device further comprises a sealing ring, which is arranged between the cover body and the inner bottom surface of the limiting seat.

5. The battery device according to any one of claims 1 to 4, characterized in that: The limiting seat is detachably connected to the battery cell.

6. The battery device according to claim 1, characterized in that: The cover body includes a plurality of arc segments, each of which extends along the first direction, and two adjacent arc segments are detachably connected around the circumference.

7. The battery device according to claim 6, characterized in that: The arc segment is provided with clamping blocks and clamping grooves on both sides of the arc segment in the circumferential direction.

8. A battery device, characterized in that: include: A battery cell, wherein the battery cell is provided with an exhaust port; The cover body is detachably connected to the battery cell, the side of the cover body away from the battery cell is an opening structure, a cover plate is arranged on the cover body, the cover plate can be opened or closed relative to the opening structure, and the exhaust port is located in the cover body.

9. The battery device according to claim 8, characterized in that: A connecting section is arranged on one side of the cover body facing the battery cell, and a threaded section is arranged on the battery cell, and the threaded section cooperates with the connecting section.

10. An electrical device, characterized in that: Comprising the battery device according to any one of claims 1 to 9.

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