Battery device and electric device

Abstract

The battery device comprises a shell, an end cover and a sealing piece, the shell is provided with an opening, the opening is closed by the end cover, a liquid injection hole is formed in the end cover, the sealing piece is arranged at the end, facing the shell, of the liquid injection hole, and the density of the sealing piece is smaller than that of electrolyte in the shell; the sealing piece can move relative to the liquid injection hole so that the liquid injection hole can be communicated or sealed. According to the scheme provided by the invention, when the electrolyte is injected into the liquid injection hole through the external liquid injection nozzle, the external liquid injection nozzle downwards presses the sealing element, and at the moment, the liquid injection hole is conducted; when the liquid level of the electrolyte in the shell reaches a preset position, the density of the sealing element is smaller than that of the electrolyte, and at the moment, the sealing element can seal the corresponding liquid injection hole after floating upwards; when the electrolyte is absorbed by the pole piece in the shell, the liquid level of the electrolyte drops, the sealing piece drops due to the gravity of the sealing piece, and the liquid injection hole is communicated, so that the formation produced gas is conveniently released.

Description

Technical Field

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

[0002] Currently, the electrolyte filling holes on battery covers are all straight-through structures. When the amount of electrolyte inside the battery is too high, overflow is very likely to occur. The overflowing electrolyte will adhere to the battery casing, cover, terminals, and the work areas of the electrolyte filling, formation, and insertion equipment. To prevent overflow, sealing components are generally installed in the electrolyte filling holes.

[0003] The sealing components in the related technologies cannot effectively solve the problems of leakage and battery venting during use. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can solve the problems of leakage and battery venting during use of the sealing component.

[0005] To address the aforementioned technical problems, in a first aspect, this application proposes a battery device, comprising:

[0006] A housing having an opening;

[0007] An end cap that closes the opening and has an injection hole.

[0008] A sealing element is disposed at the end of the injection hole facing the housing. The density of the sealing element is less than the density of the electrolyte inside the housing. The sealing element is movable relative to the injection hole to allow the injection hole to open or close.

[0009] In the technical solution of this application embodiment, when electrolyte is injected into the injection hole through the external injection nozzle, the external injection nozzle presses down on the sealing member, at which time the injection hole is open; when the electrolyte level in the shell reaches the preset position, since the density of the sealing member is less than the density of the electrolyte, the sealing member floats up and can seal the corresponding injection hole; when the electrolyte is absorbed by the electrode in the shell, the electrolyte level drops, the sealing member falls due to its own gravity, the injection hole is open, thereby facilitating the release of formation gas.

[0010] In some embodiments, the sealing element includes a sealing ball and a connector. The sealing ball is disposed at one end of the injection hole facing the housing. The density of the sealing ball is less than the density of the electrolyte, and the diameter of the sealing ball is greater than the inner diameter of the injection hole.

[0011] The connector is connected to the sealing ball and is configured to attach the sealing ball to the injection hole.

[0012] In this way, when electrolyte is injected into the injection hole through the external injection nozzle, the external injection nozzle presses down on the connector, and the connector moves the sealing ball downward, at which point the injection hole is open. When the electrolyte level inside the shell reaches the preset position, because the density of the sealing ball is less than the density of the electrolyte, and the diameter of the sealing ball is larger than the inner diameter of the injection hole, the sealing ball floats up and can seal the corresponding injection hole. When the electrolyte is absorbed by the electrode plate inside the shell, the electrolyte level drops, and the sealing ball falls due to its own gravity, opening the injection hole and facilitating the release of formation gas.

[0013] In some embodiments, the seal further includes a limiter disposed at one end of the injection port facing the housing;

[0014] When the sealing ball is not in contact with the electrolyte, the injection hole is open, and the sealing ball contacts the limiter.

[0015] In this way, when the sealing ball is not in contact with the electrolyte, it can fall to the limiter due to its own weight, thus preventing the sealing ball from entering the casing and affecting the overall battery performance in the event of connector failure.

[0016] In some embodiments, the end of the injection hole facing the housing is provided with a rounded chamfer section, and the limiter is connected to the side of the rounded chamfer section facing the housing; and the inner diameter of the side of the rounded chamfer section facing the housing is larger than the diameter of the sealing ball.

[0017] In this way, since the inner diameter of the chamfered section facing the housing is larger than the diameter of the sealing ball, it is easier for the sealing ball to fit tightly against the side of the injection hole facing the housing after entering the chamfered section.

[0018] In some embodiments, the limiter includes a plurality of first elastic plates and a plurality of second elastic plates;

[0019] One end of each of the first elastic pieces is connected to the side of the rounded chamfer section facing the housing, and the other end of each of the first elastic pieces is connected to the second elastic piece;

[0020] The first elastic sheet extends along a first direction, and the second elastic sheet is inclined inward relative to the first elastic sheet, wherein the first direction is the injection direction in the injection hole;

[0021] The sealing ball is at least partially located within the space enclosed by the plurality of the first elastic sheets.

[0022] Since the limiter is formed by the first elastic sheet and the second elastic sheet, when the sealing ball is not in contact with the electrolyte, it falls under its own weight and comes into elastic contact with the second elastic sheet, which effectively buffers the weight of the sealing ball acting on the second elastic sheet and prevents the second elastic sheet from being crushed.

[0023] Meanwhile, as the sealing ball floats up, the second elastic plate tilts towards the bottom of the sealing ball, which allows the sealing ball to fit tightly against the injection hole under the force of the second elastic plate.

[0024] In some embodiments, the connector includes a support rod and a connecting rod, the support rod being mounted on the outward-facing end of the injection hole, the connecting rod being configured to connect the support rod to the sealing ball, and the length of the connecting rod being adjustable.

[0025] In this way, by adjusting the length of the connecting rod, the sealing ball can be disengaged from the injection hole.

[0026] In some embodiments, the surface of the sealing ball is provided with an electrolyte-resistant coating. This prevents the sealing ball from being corroded by the electrolyte.

[0027] In some embodiments, a sealing ring is provided on the contact surface of the sealing ball relative to the injection hole, and / or,

[0028] A sealing ring is provided on the contact edge of the injection hole relative to the sealing ball.

[0029] This improves the sealing performance of the sealing ball when it comes into contact with the injection hole.

[0030] In some embodiments, the battery device further includes a dust cover detachably attached to the outward-facing end of the filling port. This prevents external debris from falling into the filling port.

[0031] Secondly, this application proposes an electrical device, including a battery device as described in any one of the embodiments of this application.

[0032] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the embodiments described below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 This is a schematic diagram of the structure of an electrical device provided in some embodiments of this application;

[0035] Figure 2 This is a schematic diagram of the battery structure provided in some embodiments of this application;

[0036] Figure 3 This is a schematic diagram of the structure of a battery cell provided in some embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the structure of a battery device provided in some embodiments of this application;

[0038] Figure 5 Schematic diagrams of seals provided for some embodiments of this application;

[0039] Figure 6 This is a schematic diagram of the seal provided in some embodiments of this application after it has fallen.

[0040] The reference numerals in the detailed embodiments are as follows:

[0041] 1000, vehicles;

[0042] 100. Battery; 200. Controller; 300. Motor; 400. Seals;

[0043] 110. Housing; 111. First part; 112. Second part; 120. Battery cell; 121. Housing; 122. End cap; 1221. Liquid filling hole; 12211. Rounded chamfer section; 123. Electrode assembly;

[0044] 410. Sealing ball; 420. Connector; 421. Support rod; 422. Connecting rod; 430. Limiter; 431. First elastic plate; 432. Second elastic plate. Detailed Implementation

[0045] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

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

[0048] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0049] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

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

[0051] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0052] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0053] With the rapid development of the new energy industry, aluminum-cased power batteries have been widely used in vehicles, ships, and energy storage. As a core component of vehicle and ship power and energy storage products, the performance, lifespan, and reliability of aluminum-cased power batteries directly determine the product's competitiveness in the market. In the manufacturing of aluminum-cased batteries, "leakage" is an unavoidable problem for lithium battery companies today. Leakage causing internal liquid shortages affects the battery's cycle life, and in severe cases, insufficient liquid can lead to lithium plating and dead zones, seriously endangering the battery's charge / discharge performance and reliability.

[0054] There are two main reasons for battery "overflow": First, the battery is designed to have a higher liquid injection volume, so even after the electrode is fully wetted, there is still a lot of liquid floating inside the battery; Second, the electrode has poor liquid absorption performance and cannot be fully wetted within the specified process time, resulting in a lot of liquid floating.

[0055] In the manufacturing process of aluminum-cased batteries, excessive internal electrolyte can cause leakage during the electrolyte injection, formation, and helium filling processes. Currently, the leakage problem is usually solved by adjusting the ratio of primary and secondary electrolyte injection volumes to reduce the total electrolyte volume, but this cannot meet the current demand for high electrolyte volumes in lithium batteries.

[0056] Currently, the electrolyte filling holes on battery covers are all of a straight-through structure. When the amount of electrolyte inside the battery is excessive, overflow is very likely to occur. This causes the overflowing electrolyte to adhere to the battery casing, cover, terminals, and the workstations of the electrolyte filling, formation, and insertion equipment, corroding the battery aluminum casing and affecting the product's appearance and reliability. Therefore, there is a need to develop a device to prevent electrolyte overflow from the battery filling holes, effectively preventing the electrolyte inside the battery from overflowing from the filling holes when there is a large amount of electrolyte.

[0057] Based on the above considerations, in order to solve the problems of leakage and battery venting during use of the sealing component, a battery device is designed. The battery device includes a housing, an end cap, and a seal. The housing has an opening, the end cap closes the opening, and the end cap is provided with an injection hole. The seal is located at the end of the injection hole facing the housing. The density of the seal is less than the density of the electrolyte inside the housing. The seal can move relative to the injection hole to make the injection hole open or sealed.

[0058] In the technical solution of this application embodiment, when electrolyte is injected into the injection hole through the external injection nozzle, the external injection nozzle presses down on the sealing member, at which time the injection hole is open; when the electrolyte level in the shell reaches the preset position, since the density of the sealing member is less than the density of the electrolyte, the sealing member floats up and can seal the corresponding injection hole; when the electrolyte is absorbed by the electrode in the shell, the electrolyte level drops, the sealing member falls due to its own gravity, the injection hole is open, thereby facilitating the release of formation gas.

[0059] In this application, "battery" refers to a single physical module comprising one or more individual battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery pack, etc. Batteries can serve as a power source or power system for electrical devices, which helps improve the overall performance of the battery and facilitates its widespread adoption.

[0060] The aforementioned electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0061] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0062] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

[0063] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0064] Please refer to Figure 2 , Figure 2This is an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 110 and a battery cell 120, with the battery cell 120 housed within the housing 110. The housing 110 provides a accommodating space for the battery cell 120, and the housing 110 can adopt various structures. In some embodiments, the housing 110 may include a first portion 111 and a second portion 112, which overlap each other, and together define a accommodating space for accommodating the battery cell 120. The second portion 112 may be a hollow structure with one open end, and the first portion 111 may be a plate-like structure, with the first portion 111 covering the open side of the second portion 112 so that the first portion 111 and the second portion 112 together define the accommodating space; alternatively, the first portion 111 and the second portion 112 may both be hollow structures with one open side, with the open side of the first portion 111 covering the open side of the second portion 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be of various shapes, such as cylinder, cuboid, etc.

[0065] In battery 100, there can be multiple battery cells 120. These multiple battery cells 120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 120 are connected in both series and parallel. Multiple battery cells 120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 120 is housed within housing 110. Alternatively, battery 100 can also consist of multiple battery cells 120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within housing 110. Battery 100 may also include other structures; for example, battery 100 may also include a busbar component for electrical connection between multiple battery cells 120.

[0066] Each battery cell 120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 120 can be cylindrical, flat, cuboid, or other shapes.

[0067] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123, and electrode terminals. The housing includes a casing 121 and an end cap 122. The casing 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0068] The housing 121 is an assembly used to cooperate with the end cap 122 to form the internal environment of the battery cell 120, wherein the formed internal environment can accommodate the electrode assembly 123, electrolyte, and other components. The housing 121 and the end cap 122 can be independent components. The housing 121 can have various shapes and sizes. Specifically, the shape of the housing 121 can be determined according to the specific shape and size of the electrode assembly 123. The housing 121 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0069] End cap 122 refers to a component that covers the opening of housing 121 to isolate the internal environment of battery cell 120 from the external environment. The shape of end cap 122 can be adapted to the shape of housing 121 to fit it. Optionally, end cap 122 can be made of a material with certain hardness and strength, such as aluminum alloy. This makes end cap 122 less prone to deformation under pressure and impact, allowing battery cell 120 to have higher structural strength and improved reliability. Functional components such as electrode terminals can be provided on end cap 122. Electrode terminals can be used for electrical connection with electrode assembly 123 to output or input electrical energy to battery cell 120. The material of end cap 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating structure can also be provided on the inner side of end cap 122. The insulating structure can be used to isolate the electrical connection components inside housing 121 from end cap 122 to reduce the risk of short circuit. For example, the insulating structure can be made of plastic, rubber, etc.

[0070] Electrode assembly 123 is the component in the battery cell 120 where electrochemical reactions occur. The housing 121 may contain one or more electrode assemblies 123. The electrode assembly 123 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets to separate them and prevent internal short circuits. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 123, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or at opposite ends. During the charging and discharging process of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop. Furthermore, the electrode assembly 123 can be a wound structure or a stacked structure.

[0071] In some embodiments, the battery cell 120 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 120 reaches a threshold.

[0072] According to some embodiments of this application, such as Figure 4 As shown, this application provides a battery device, which includes a housing 121, an end cap 122, and a seal 400. The housing 121 has an opening, the end cap 122 closes the opening, and the end cap 122 is provided with an injection hole 1221. The seal 400 is disposed at the end of the injection hole 1221 facing the housing 121. The density of the seal 400 is less than the density of the electrolyte in the housing 121. The seal 400 can move relative to the injection hole 1221 to make the injection hole 1221 open or sealed.

[0073] In this embodiment, the connection structure between the housing 121 and the end cap 122 can be referred to the above description, and will not be repeated here.

[0074] In this embodiment, the electrolyte density of the lithium iron phosphate power battery is 1.23±0.01g / cm³, the electrolyte density of the lithium manganese oxide power battery is 1.215±0.01g / cm³, the electrolyte density of the lithium titanate power battery is 1.179±0.01g / cm³, the electrolyte density of the high-rate ternary / artificial graphite electrolyte is 1.25±0.01g / cm³, and the electrolyte density of the lithium cobalt oxide / artificial graphite electrolyte is 1.212±0.01g / cm³.

[0075] In this embodiment, the sealing element 400 can be attached to the injection hole 1221. The sealing element 400 can move up and down relative to the injection hole 1221 along its axial direction. The density of the sealing element 400 is less than the density of the corresponding electrolyte, which is not limited here.

[0076] In the technical solution of this application embodiment, when electrolyte is injected into the injection hole 1221 through the external injection nozzle, the external injection nozzle presses down on the sealing member 400, at which time the injection hole 1221 is open; when the electrolyte level in the housing 121 reaches the preset position, the sealing member 400 comes into contact with the electrolyte. Since the density of the sealing member 400 is less than the density of the electrolyte, the sealing member 400 will float up. The floated sealing member 400 can seal the corresponding injection hole 1221, thereby preventing overflow; when the electrolyte is absorbed by the electrode in the housing 121, the electrolyte level drops, and the sealing member 400 falls due to its own gravity, the injection hole is open, thereby facilitating the release of formation gas.

[0077] According to some embodiments of this application, such as Figure 5 and combined Figure 6As shown, the seal 400 includes a sealing ball 410 and a connector 420. The sealing ball 410 is disposed at the end of the injection hole 1221 facing the housing 121. The density of the sealing ball 410 is less than the density of the electrolyte, and the diameter of the sealing ball 410 is greater than the inner diameter of the injection hole 1221. The connector 420 is connected to the sealing ball 410 and is configured to hang the sealing ball 410 at the injection hole 1221.

[0078] In this embodiment, the connector 420 can be a T-shaped link, the upper end of which is longer than the inner diameter of the injection hole 1221, and the upper end rests on the upper port of the injection hole 1221. The lower end of the link is connected to the sealing ball 410. Of course, it is understood that the connector 420 can also be a Y-shaped structure, etc., and this is not limited here.

[0079] In this embodiment, the sealing ball 410 is located at the lower port of the injection hole 1221. In the initial stage, when electrolyte is injected into the injection hole 1221 through the external injection nozzle, the external injection nozzle presses down on the connector 420, causing the connector 420 to move the sealing ball 410 downwards. At this time, as... Figure 6 As shown, injection hole 1221 is in the open position;

[0080] When the electrolyte level inside the housing 121 reaches the preset position, the sealing ball 410 comes into contact with the electrolyte. Since the density of the sealing ball 410 is less than the density of the electrolyte, the sealing ball 410 will float. Because the diameter of the sealing ball 410 is larger than the inner diameter of the injection hole 1221, at this time... Figure 5 As shown, the floating sealing ball 410 can seal the corresponding injection hole 1221, thereby preventing leakage. When the electrolyte is absorbed by the electrode in the shell 121, the electrolyte level drops, and the sealing ball 410 falls due to its own gravity, opening the injection hole and facilitating the release of the formation gas.

[0081] According to some embodiments of this application, such as Figure 5 or Figure 6 As shown, the seal 400 also includes a limiter 430, which is disposed at the end of the injection hole 1221 facing the housing 121; when the sealing ball 410 is not in contact with the electrolyte, the injection hole 1221 is open, and the sealing ball 410 contacts the limiter 430.

[0082] refer to Figure 6 As shown, when the sealing ball 410 is not in contact with the electrolyte, it falls due to its own gravity, at which point the injection hole 1221 is open. Simultaneously, the connector 420 on the sealing ball 410 is tightly attached to the upper end of the injection hole 1221, thus preventing the sealing ball 410 from falling off.

[0083] At this time, the sealing ball 410 is still in contact with the limiter 430. With the support of the limiter 430, the sealing ball 410 can be prevented from entering the housing 121 and affecting the overall battery performance when the connector 420 fails.

[0084] According to some embodiments of this application, such as Figure 5 As shown, the end of the injection hole 1221 facing the housing 121 is provided with a rounded chamfer section 12211, and the limiter 430 is connected to the side of the rounded chamfer section 12211 facing the housing 121; and the inner diameter of the side of the rounded chamfer section 12211 facing the housing 121 is larger than the diameter of the sealing ball 410.

[0085] In this embodiment, the sealing ball 410 itself is located in the space formed by the limiter 430 and the rounded chamfer segment 12211.

[0086] When the sealing ball 410 comes into contact with the electrolyte, it floats up. As a result, since the inner diameter of the chamfered section 12211 facing the housing 121 is larger than the diameter of the sealing ball 410, under the constraint of the chamfered section 12211, the upper part of the sealing ball 410 will quickly pass through the chamfered section 12211 and enter the lower end of the injection hole 1221 to seal the injection hole 1221.

[0087] According to some embodiments of this application, such as Figure 5 As shown, the limiter 430 includes a plurality of first elastic pieces 431 and a plurality of second elastic pieces 432, wherein one end of each first elastic piece 431 is connected to the side of the rounded chamfer section 12211 facing the housing 121, and the other end of each first elastic piece 431 is connected to a second elastic piece 432; the first elastic pieces 431 extend along a first direction, and the second elastic pieces 432 are inclined inward relative to the first elastic pieces 431, wherein the first direction is the injection direction in the injection hole 1221; the sealing ball 410 is at least partially located within the space enclosed by the plurality of first elastic pieces 431.

[0088] The first direction in this embodiment is as follows: Figure 5 The X-axis direction in the diagram.

[0089] In this embodiment, the limiter 430 may include five or six first elastic pieces 431. At the same time, the number of first elastic pieces 431 is the same as the number of second elastic pieces 432, which is not limited here.

[0090] refer to Figure 5As shown, the upper end of the first elastic piece 431 is connected to the side of the rounded chamfer section 12211 facing the housing 121, and the lower end of the first elastic piece 431 is connected to the second elastic piece 432. At the same time, the second elastic piece 432 is inclined inward relative to the first elastic piece 431. At this time, the sealing ball 410 is located within the space enclosed by the first elastic piece 431 and the second elastic piece 432.

[0091] Since the limiter 430 is formed by the first elastic sheet 431 and the second elastic sheet 432, when the sealing ball 410 is not in contact with the electrolyte, under its own weight, the sealing ball 410 falls and elastically contacts the second elastic sheet 432. The sealing ball 410 presses down on the second elastic sheet 432 to expand outward relative to the first elastic sheet 431. This can buffer the weight of the sealing ball 410 on the second elastic sheet 432 and prevent the second elastic sheet 432 from being crushed.

[0092] Meanwhile, when the sealing ball 410 floats up, the second elastic sheet 432 tilts inward relative to the first elastic sheet 431, so that under the force of the second elastic sheet 432, the sealing ball 410 can be tightly attached to the injection hole 1221.

[0093] According to some embodiments of this application, such as Figure 5 As shown, the connector 420 includes a support rod 421 and a connecting rod 422. The support rod 421 is mounted on the outer end of the injection hole 1221, and the connecting rod 422 is configured to connect the support rod 421 and the sealing ball 410. The length of the connecting rod 422 is adjustable.

[0094] In this embodiment, the support rod 421 is horizontally arranged, and the length of the support rod 421 is greater than the inner diameter of the injection hole 1221. The support rod 421 overlaps the upper port of the injection hole 1221, and the support rod 421 is connected to the sealing ball 410 through the connecting rod 422.

[0095] In this embodiment, the connecting rod 422 can be a telescopic sleeve rod, which is not limited here.

[0096] During use, adjust the length of connecting rod 422 as needed. Figure 6 As shown, when the sealing ball 410 falls under its own weight and the support rod 421 is in close contact with the upper port of the injection hole 1221, it can ensure that the sealing ball 410 separates from the lower port of the injection hole 1221.

[0097] According to some embodiments of this application, the surface of the sealing ball 410 is provided with an electrolyte corrosion resistant coating.

[0098] In this embodiment, the electrolyte-resistant coating can be a polyethylene coating, a polypropylene coating, etc., and is not limited here. This prevents the electrolyte from corroding the corresponding sealing ball 410.

[0099] According to some embodiments of this application, a sealing ring is provided on the contact surface of the sealing ball 410 relative to the injection hole 1221, and / or, a sealing ring is provided on the contact edge of the injection hole 1221 relative to the sealing ball 410.

[0100] In this embodiment, a sealing ring is provided on the contact surface of the sealing ball 410 relative to the injection hole 1221, or a sealing ring is provided on the contact edge of the injection hole 1221 relative to the sealing ball 410, or a sealing ring is provided on the contact surface of the sealing ball 410 relative to the injection hole 1221, and a sealing ring is also provided on the contact edge of the injection hole 1221 relative to the sealing ball 410. In this way, the sealing performance of the sealing ball 410 and the injection hole 1221 can be improved when they are in contact.

[0101] According to some embodiments of this application, the battery device also includes a dust cover, which is detachably connected to the outer end of the injection hole 1221.

[0102] In this embodiment, the dust cover can be connected to the outer end of the injection hole 1221 by bolts or clips, which is not limited here.

[0103] By attaching a dust cover to the outer end of the injection hole 1221, external debris can be prevented from falling into the injection hole 1221.

[0104] This application also provides an electrical device, including a battery device as described in any of the embodiments of this application.

[0105] The specific structure of the battery device in this embodiment refers to the above embodiments. Since the power device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A housing having an opening; An end cap that closes the opening and has an injection hole. A sealing element is disposed at the end of the injection hole facing the housing. The density of the sealing element is less than the density of the electrolyte inside the housing. The sealing element is movable relative to the injection hole to allow the injection hole to open or close.

2. The battery device according to claim 1, characterized in that, The sealing element includes a sealing ball and a connector. The sealing ball is disposed at the end of the injection hole facing the housing. The density of the sealing ball is less than the density of the electrolyte, and the diameter of the sealing ball is greater than the inner diameter of the injection hole. The connector is connected to the sealing ball and is configured to attach the sealing ball to the injection hole.

3. The battery device according to claim 2, characterized in that, The sealing element also includes a limiter, which is disposed at the end of the injection hole facing the housing; When the sealing ball is not in contact with the electrolyte, the injection hole is open, and the sealing ball contacts the limiter.

4. The battery device according to claim 3, characterized in that, The injection hole has a chamfered section at one end facing the housing, and the limiter is connected to the chamfered section on the side facing the housing; and the inner diameter of the chamfered section on the side facing the housing is larger than the diameter of the sealing ball.

5. The battery device according to claim 4, characterized in that, The limiter includes a plurality of first elastic plates and a plurality of second elastic plates; One end of each of the first elastic pieces is connected to the side of the rounded chamfer section facing the housing, and the other end of each of the first elastic pieces is connected to the second elastic piece; The first elastic sheet extends along a first direction, and the second elastic sheet is inclined inward relative to the first elastic sheet, wherein the first direction is the injection direction in the injection hole; The sealing ball is at least partially located within the space enclosed by the plurality of the first elastic sheets.

6. The battery device according to claim 2, characterized in that, The connector includes a support rod and a connecting rod. The support rod is mounted on the outward-facing end of the injection hole, and the connecting rod is configured to connect the support rod to the sealing ball. The length of the connecting rod is adjustable.

7. The battery device according to any one of claims 2 to 6, characterized in that, The surface of the sealing ball is coated with an electrolyte-resistant coating.

8. The battery device according to any one of claims 2 to 6, characterized in that, A sealing ring is provided on the contact surface of the sealing ball relative to the injection hole, and / or, A sealing ring is provided on the contact edge of the injection hole relative to the sealing ball.

9. The battery device according to any one of claims 1 to 6, characterized in that, The battery device also includes a dust cover, which is detachably connected to the outer end of the injection hole.

10. An electrical device, characterized in that, Includes the battery device as described in any one of claims 1 to 9.

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