Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, the battery device comprises an end cover and a shell, the shell is provided with an opening, and the end cover seals the opening to form a sealed cavity; at least one side face of the shell is provided with a liquid injection hole, the inner wall of the shell is provided with a flow channel, the flow channel is communicated with the liquid injection hole, the flow channel has a forward flow direction, and the forward flow direction is the direction from the outside to the inside of the sealed cavity; under the condition that the liquid flows from the liquid injection hole to the flow channel, the liquid is prevented from flowing in the reverse direction of forward flowing. According to the scheme provided by the invention, when the electrolyte is injected into the shell from the liquid injection hole, the electrolyte is transmitted and infiltrated from the side surface of the battery cell to the periphery, and the electrolyte is prevented from infiltrating from the periphery to the middle, so that air in the middle in the shell can be driven to the periphery, a liquid sealing phenomenon of the electrolyte on the side surface of the battery cell in the infiltration process is avoided, and the service life of the battery cell is prolonged. Therefore, the infiltration effect of the side surface of the cell is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and a power utilization device. BACKGROUND

[0002] The battery mainly comprises a shell, a battery cell and a battery top cover. The battery top cover is installed on the top of the shell and cooperates with the shell to form an assembly cavity. The battery cell is installed in the assembly cavity. The battery top cover is provided with a liquid injection hole for injecting electrolyte into the assembly cavity.

[0003] In the related art, the liquid injection hole is prone to cause poor impregnation of the battery cell during use. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which can solve the problem of poor impregnation of the battery cell during liquid injection.

[0005] To solve the above technical problems, in a first aspect, the present application provides a battery device, comprising:

[0006] an end cover;

[0007] a shell having an opening, the end cover closing the opening to form a sealed cavity; at least one side surface of the shell is provided with a liquid injection hole, and an inner wall of the shell is provided with a flow channel, the flow channel being in communication with the liquid injection hole, the flow channel having a forward flow direction, the forward flow direction being from the outside to the inside of the sealed cavity;

[0008] Under the condition that the liquid flows from the liquid injection hole to the flow channel, the liquid is hindered from flowing in the reverse direction of the forward flow.

[0009] In the technical scheme of the present application, the liquid injection hole is arranged on the side surface of the shell. When the electrolyte is injected into the shell from the liquid injection hole, the electrolyte is transmitted and impregnated from the side surface of the battery cell to the surrounding, avoiding impregnation of the electrolyte from the surrounding to the middle, so that the air in the middle of the shell is driven to the periphery, avoiding liquid sealing phenomenon of the battery cell side surface during the impregnation process of the electrolyte, thereby improving the impregnation effect of the battery cell side surface. At the same time, the flow channel on the inner wall of the shell has a forward flow direction, so that the liquid cannot flow in the reverse direction of the forward flow, thereby accelerating the liquid injection speed.

[0010] In some embodiments, the liquid injection hole is arranged on each side surface of the shell, and the flow channel is arranged on the inner wall of each side surface of the shell, and the flow channel is in communication with the corresponding liquid injection hole. In this way, the liquid injection speed and the impregnation speed of the battery cell can be improved, and the liquid sealing phenomenon of the battery cell side surface during the electrolyte impregnation process can be avoided.

[0011] In some embodiments, at least two flow channels are arranged on the inner wall of each side of the shell. In this way, the liquid injection speed can be further improved.

[0012] In some embodiments, a plurality of flow channels are arranged on the inner wall of each side of the shell.

[0013] In some embodiments, the flow channel is composed of a flow channel of a Tesla valve. The Tesla valve can only allow fluid (gas or liquid) to flow smoothly in the forward flow direction. When the liquid flows from the outside to the Tesla valve, it will flow along the forward flow direction. At this time, the liquid is hindered from flowing in the opposite direction of the forward flow direction, so that the phenomenon of liquid overflow from the liquid injection hole during liquid injection can be avoided.

[0014] In some embodiments, the Tesla valve includes at least one main flow channel and at least one annular bypass flow channel.

[0015] The main flow channel and the annular bypass flow channel are arranged on the inner wall of the shell, one end of the main flow channel towards the liquid injection hole is in communication with the liquid injection hole, and both ends of the annular bypass flow channel are in communication with the main flow channel.

[0016] In some embodiments, the flow channel width of the main flow channel is 1-3 mm; and / or,

[0017] The flow channel width of the annular bypass flow channel is 1-3 mm. Since the flow channel size is a key variable that determines the flow rate of the electrolyte, by limiting the size, the flow rate of the electrolyte can be matched with the actual production and the demand of the battery cell.

[0018] In some embodiments, the inner wall roughness Ra of the flow channel is ≤1.6 μm. In this way, the frictional resistance of the electrolyte and the wall surface can be reduced, and the flow efficiency can be further improved.

[0019] In some embodiments, the inner wall of the liquid injection hole is provided with a corrosion-resistant layer; and / or, the inner wall of the flow channel is provided with a corrosion-resistant layer. In this way, the electrolyte can be prevented from corroding the inner wall of the liquid injection hole and the flow channel.

[0020] In a second aspect, the application provides a battery device.

[0021] The above description is only a summary of the technical solutions of the application. In order to more clearly understand the technical means of the application, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the implementation. The accompanying drawings are included to provide a description of the implementation and are not intended to limit the scope of the application. Moreover, in the drawings, like reference numerals designate similar parts throughout the several views. In the drawings:

[0023] Figure 1 Structure diagram of the power device provided by some embodiments of the application;

[0024] Figure 2 Structure diagram of the battery provided by some embodiments of the application;

[0025] Figure 3 Structure diagram of the battery cell provided by some embodiments of the application;

[0026] Figure 4 Structure diagram of the shell provided by some embodiments of the application;

[0027] Figure 5 Structure diagram of the shell provided by some embodiments of the application; Figure 4 Structure diagram of the shell provided by some embodiments of the application;

[0028] Figure 6 Structure diagram of the injection port and flow channel provided by some embodiments of the application;

[0029] Figure 7 Structure diagram of the flow channel provided by some embodiments of the application;

[0030] Figure 8 Structure diagram of the shell provided by some embodiments of the application;

[0031] Figure 9 Structure diagram of the shell provided by some embodiments of the application; Figure 8 Structure diagram of the shell provided by some embodiments of the application.

[0032] Reference numerals in the detailed description are as follows:

[0033] 1000, vehicle;

[0034] 100, battery; 200, controller; 300, motor;

[0035] 110, box; 111, first part; 112, second part; 120, battery cell; 121, shell; 122, end cover; 1221, injection hole; 123, electrode assembly;

[0036] 130, injection hole; 140, flow channel; 141, main flow passage; 142, annular bypass flow passage. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0038] 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 belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "coupled" as used herein means the joining of two members together with one or more intervening members.

[0039] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0040] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0041] 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, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0042] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0043] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0044] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled 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.

[0045] At present, from the development of market situation, the application of power battery is more and more extensive. Power battery is not only applied to energy storage power supply system such as hydroelectric power station, thermal power station, wind power station and solar power station, but also widely applied to electric vehicles such as electric bicycle, electric motorcycle, electric automobile and electric traffic tools, as well as military equipment and aerospace. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0046] In the related art, the battery mainly includes a shell, a battery cell and a battery top cover. The battery top cover is mounted on the top of the shell and cooperates with the shell to form an assembly cavity. The battery cell is mounted in the assembly cavity. The battery top cover is provided with a liquid injection hole for injecting electrolyte into the assembly cavity.

[0047] When the electrolyte is injected through the liquid injection hole, since the liquid injection hole is designed on the battery top cover, the electrolyte infiltrates from the periphery to the center of the battery cell after injection. This will cause the air to be sealed in the center, which is difficult to discharge subsequently, and thus will cause the problem of poor infiltration of the battery cell.

[0048] Based on the above consideration, in order to solve the problem of poor infiltration of the battery cell during the injection process, a battery device is designed. The battery device comprises a cover and a shell. The shell has an opening, and the cover closes the opening to form a sealed cavity. At least one side surface of the shell is provided with a liquid injection hole, and an inner wall of the shell is provided with a flow channel. The flow channel is in communication with the liquid injection hole, and the flow channel has a forward flow direction. The forward flow direction is from the outside to the inside of the sealed cavity. Under the condition that the liquid flows from the liquid injection hole to the flow channel, the liquid is hindered from flowing in the opposite direction of the forward flow.

[0049] In the technical scheme of the embodiment of the application, the liquid injection hole is arranged on the side of the shell. When the electrolyte is injected into the shell from the liquid injection hole, the electrolyte is transmitted and infiltrated from the side of the battery cell to the periphery, avoiding the electrolyte from infiltrating from the periphery to the middle. In this way, the air in the middle of the shell can be driven to the periphery, avoiding the liquid seal phenomenon on the side of the battery cell in the infiltration process, thereby improving the infiltration effect of the side of the battery cell. At the same time, since the flow channel on the inner wall of the shell has a forward flow direction, the liquid cannot flow in the opposite direction of the forward flow direction. In this way, the liquid injection speed can be accelerated.

[0050] The battery in the application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the application can include a battery pack and the like. The battery can be used as a power supply or a power supply system of an electric device, so as to improve the overall performance of the battery and facilitate the promotion of the battery.

[0051] The electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric aircraft toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0052] The following embodiments are described by taking a vehicle 1000 as an example for convenience of description.

[0053] Please refer to Figure 1 , Figure 1 The vehicle 1000 provided by some embodiments of the application is a structural schematic diagram. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile. The vehicle 1000 is internally provided with a battery 100. The battery 100 can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further 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 demand of the vehicle 1000 during starting, navigation, and driving.

[0054] In some embodiments of the application, the battery 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0055] Please refer toFigure 2 , Figure 2 This 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] According to some embodiments of this application, Figure 4 This is a schematic diagram of the shell in this application. Figure 5 for Figure 4 Side view, Figure 6 This is a schematic diagram of the injection port and flow channel in this application. Figure 7 This is a schematic diagram of the flow channel in this application. Figure 4 and combined Figure 5 , Figure 6 , Figure 7 As shown, this application provides a battery device, which includes an end cap 122 and a housing 121. The housing 121 has an opening, and the end cap 122 closes the opening to form a sealed cavity. At least one side of the housing 121 is provided with an injection hole 130, and the inner wall of the housing 121 is provided with a flow channel 140. The flow channel 140 communicates with the injection hole 130 and has a forward flow direction, which is from the outside to the inside of the sealed cavity. When liquid flows from the injection hole 130 to the flow channel 140, the liquid is obstructed from flowing in the opposite direction of the forward flow.

[0064] In this embodiment, the connection structure between the end cap 122 and the housing 121 can be referred to the description above, and will not be repeated here.

[0065] In this embodiment, the forward flow direction is as follows: Figure 7 The X-axis direction in the diagram.

[0066] In this embodiment, injection holes 130 can be provided on one or two equal sides of the housing 121, such as... Figure 8 and Figure 9 As shown, injection holes 130 can also be provided on each side of the housing 121. The specific details can be determined according to the actual situation, and this specification does not limit this embodiment.

[0067] In this embodiment, the injection hole 130 can be located in the middle of the side, or the injection hole 130 can be located in other positions on the side. The specific location can be determined according to the actual situation, and this embodiment does not limit this.

[0068] In this embodiment, the flow channel 140 can be formed by the flow channel in the Tesla valve, which is not limited here.

[0069] During use, by providing injection holes 130 on the side of the housing 121, when electrolyte is injected into the housing 121 through the injection holes 130, the electrolyte is transferred and wetted from the side of the cell to the surrounding areas, preventing the electrolyte from wetting from the surrounding areas to the center. This drives the air in the center of the housing 121 to the periphery, avoiding liquid sealing on the side of the cell during the wetting process, thereby improving the wetting effect on the side of the cell. At the same time, since the flow channels 140 on the inner wall of the housing 121 have a positive flow direction, the liquid cannot flow in the opposite direction of the positive flow. This can speed up the injection speed and prevent the electrolyte from overflowing from the injection holes 130 on the side.

[0070] According to some embodiments of this application, such as Figure 5 and combined Figure 6 As shown, each side of the housing 121 is provided with an injection hole 130, and each side of the housing 121 is provided with a flow channel 140 on its inner wall, and the flow channel 140 is connected to the corresponding injection hole 130.

[0071] In this embodiment, injection holes 130 can be provided on all four sides of the housing 121. At the same time, flow channels 140 are provided on the inner walls of the four sides, and each flow channel 140 is connected to the corresponding injection hole 130. Of course, it can be understood that injection holes 130 can also be provided on three sides of the housing 121, and this is not limited here.

[0072] This embodiment improves the electrolyte injection speed and increases the cell immersion speed by providing injection holes 130 on each side of the housing 121, thereby preventing liquid sealing on the side of the cell during the electrolyte immersion process.

[0073] According to some embodiments of this application, such as Figure 5 and combined Figure 6 As shown, at least two flow channels 140 are provided on the inner wall of each side of the housing 121.

[0074] In this embodiment, two or three equal flow channels 140 can be provided on the inner wall of each side of the housing 121, which is not limited here. In this way, the electrolyte injected through the injection hole 130 will be quickly distributed into each flow channel 140, further improving the injection speed.

[0075] According to some embodiments of this application, such as Figure 5 and combined Figure 6 As shown, multiple evenly distributed flow channels 140 are provided on the inner wall of each side of the housing 121.

[0076] In this embodiment, three or four equal flow channels 140 can be evenly distributed on the inner wall of each side. The specific number can be determined according to the actual situation, and this embodiment does not limit this.

[0077] In this embodiment, multiple evenly distributed flow channels 140 are provided on the inner wall of the side, thereby effectively improving the uniformity of electrolyte wetting.

[0078] According to some embodiments of this application, the flow channel 140 is formed by the flow channel of a Tesla valve.

[0079] Because a Tesla valve allows fluid (gas or liquid) to flow smoothly only in the forward flow direction, when liquid flows into the Tesla valve from the outside, it will flow in the forward flow direction. At this time, the liquid is prevented from flowing in the opposite direction of the forward flow, thus preventing liquid from overflowing from the injection hole during injection.

[0080] According to some embodiments of this application, such as Figure 7 As shown, the Tesla valve includes at least one main flow channel 141 and at least one annular bypass flow channel 142, wherein the main flow channel 141 and the annular bypass flow channel 142 are both disposed on the inner wall of the housing 121, one end of the main flow channel 141 facing the injection hole 130 is connected to the injection hole 130, and both ends of the annular bypass flow channel 142 are connected to the main flow channel 141.

[0081] In this embodiment, the Tesla valve may include three main flow channels 141 and three annular bypass flow channels 142, forming a three-stage structure. The specific design can be determined according to actual conditions, and this embodiment does not limit this aspect.

[0082] By carving the flow channel of the Tesla valve as described above into the inner wall of the housing 121 to form the flow channel 140, the phenomenon of liquid overflowing from the injection hole during liquid injection can be avoided.

[0083] According to some embodiments of this application, the flow channel width of the main flow channel 141 is 1mm-3mm; and / or, the flow channel width of the annular bypass flow channel 142 is 1mm-3mm.

[0084] Since the channel size is a key variable that determines the electrolyte flow rate, limiting the size allows the electrolyte flow rate to match the actual production and cell requirements.

[0085] According to some embodiments of this application, the inner wall roughness Ra of the flow channel 140 is ≤1.6μm. This reduces the frictional resistance between the electrolyte and the wall surface, further improving flow efficiency.

[0086] According to some embodiments of this application, the inner wall of the injection hole 130 is provided with an anti-corrosion layer; and / or, the inner wall of the flow channel 140 is provided with an anti-corrosion layer.

[0087] In this embodiment, the anti-corrosion layer may be provided only on the inner wall of the injection hole 130, or only on the inner wall of the flow channel 140, or both the inner walls of the injection hole 130 and the flow channel 140 may be provided with anti-corrosion layers. For ease of explanation, the following description will use the example of both the inner walls of the injection hole 130 and the inner walls of the flow channel 140 being provided with anti-corrosion layers.

[0088] The anti-corrosion layer in this embodiment can be polyimide, polytetrafluoroethylene, etc., and the specific material can be determined according to the actual situation. This specification does not limit this embodiment.

[0089] By providing anti-corrosion layers on the inner walls of the injection hole 130 and the flow channel 140, the corrosion of the injection hole 130 and the inner walls of the flow channel 140 by the electrolyte can be prevented.

[0090] This application also provides an electrical device, including a battery device as described in any of the embodiments of this application.

[0091] 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.

[0092] 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: End cap; The housing has an opening, and the end cap closes the opening to form a sealed cavity; at least one side of the housing is provided with an injection hole, and the inner wall of the housing is provided with a flow channel, the flow channel communicating with the injection hole, the flow channel having a positive flow direction, the positive flow being from the outside to the inside of the sealed cavity; When liquid flows from the injection hole into the flow channel, the liquid is prevented from flowing in the opposite direction to the forward flow.

2. The battery device according to claim 1, characterized in that, Each side of the housing is provided with an injection hole, and the inner wall of each side of the housing is provided with a flow channel, which communicates with the corresponding injection hole.

3. The battery device according to claim 2, characterized in that, At least two flow channels are provided on the inner wall of each side of the housing.

4. The battery device according to claim 2, characterized in that, The inner wall of each side of the housing is provided with a plurality of evenly distributed flow channels.

5. The battery device according to any one of claims 1 to 4, characterized in that, The flow channel is formed by the flow path of a Tesla valve.

6. The battery device according to claim 5, characterized in that, The Tesla valve includes at least one main flow channel and at least one annular bypass flow channel; Both the main flow channel and the annular bypass flow channel are disposed on the inner wall of the housing. The end of the main flow channel facing the injection hole is connected to the injection hole, and both ends of the annular bypass flow channel are connected to the main flow channel.

7. The battery device according to claim 6, characterized in that, The width of the main flow channel is 1mm-3mm; and / or, The width of the annular bypass channel is 1mm-3mm.

8. The battery device according to any one of claims 1 to 4, characterized in that, The roughness Ra of the inner wall of the flow channel is ≤1.6μm.

9. The battery device according to any one of claims 1 to 4, characterized in that, The inner wall of the injection hole is provided with an anti-corrosion layer; and / or, The inner wall of the flow channel is provided with an anti-corrosion layer.

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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