Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, a sealing part in a box body of the battery device comprises a sealing part and a connecting part which are connected with each other, the sealing part is clamped between a box main body and a cover body, the connecting part extends out of the space between the box main body and the cover body, and at least part of the connecting part is connected to the outer surface, deviating from an accommodating space, of the cover body; and the accommodating space is in a negative pressure state. The connecting part extends out of the space between the box main body and the cover body and is at least partially connected to the outer surface, deviating from the accommodating space, of the cover body, so that the sealing element can be fixed relative to the cover body by being connected to the outer surface, deviating from the accommodating space, of the cover body during installation, and positioning of the sealing element in the installation process is achieved; the complexity of the sealing element in the mounting process is reduced, the convenience of assembling the battery device is improved, and the production efficiency of the battery device is improved.

Description

TECHNICAL FIELD

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

[0002] The battery device has the advantages of high specific energy and high power density, and is widely used in electronic devices and vehicles, such as mobile phones, notebook computers, electric vehicles, electric cars, electric planes, electric ships and electric tools.

[0003] With the continuous expansion of the application range of the battery device, the market demand for the battery device is also increasing. How to improve the production efficiency of the battery device is more and more concerned by the technical personnel in the field. 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 is convenient to assemble and is conducive to improving the production efficiency.

[0005] In the first aspect, some embodiments of the present application provide a battery device, which comprises a battery monomer group and a box body. The box body comprises a box main body, a cover body and a sealing piece. The box main body forms a containing space with an opening. The battery monomer group is contained in the containing space. The cover body covers the opening. The sealing piece comprises a sealing part and a connecting part connected with each other. The sealing part is clamped between the box main body and the cover body. The connecting part extends from between the box main body and the cover body, and at least part of the connecting part is connected to the outer surface of the cover body away from the containing space. The containing space is in a negative pressure state.

[0006] In the above structure, since the sealing part of the sealing piece is clamped between the box main body and the cover body, and the connecting part extends from between the box main body and the cover body and is at least partially connected to the outer surface of the cover body away from the containing space, the sealing piece can be relatively fixed with the cover body by being connected to the outer surface of the cover body away from the containing space during installation. The positioning of the sealing piece during installation is realized, the complexity of the sealing piece during installation is reduced, the convenience of assembling the battery device is improved, and the production efficiency of the battery device is improved. At the same time, since the containing space is in a negative pressure state, under the action of the external atmospheric pressure, the cover body will press the box main body at the opening, so that the sealing part between the box main body and the cover body is more closely attached to the cover body and the box main body, which is conducive to improving the sealing ability of the sealing piece to the interface between the cover body and the box main body.

[0007] According to the battery device provided by some embodiments of the present application, the sealing member further comprises a fitting portion connected to the sealing portion and the connecting portion and extending from between the box body and the cover body, the fitting portion, the sealing portion and the connecting portion enclose a containing cavity, the cover body is contained in the containing cavity, the fitting portion is attached to a surface of the cover body facing the containing space, the connecting portion is attached to an outer surface of the cover body away from the containing space, and the containing cavity is in a negative pressure state, so that the fitting portion, the sealing portion and the connecting portion are tightly attached to the surface of the cover body under the action of the external atmospheric pressure, not only enabling the fitting portion, the sealing portion and the connecting portion to be connected to the cover body, but also reducing the gap between the sealing member and the cover body and reducing the space occupied by the sealing member.

[0008] According to the battery device provided by some embodiments of the present application, the connecting portion comprises a first portion and a second portion, the first portion and the second portion are respectively connected to two ends of the sealing portion in the arrangement direction of the cover body and the box body, the first portion is connected to an outer surface of the cover body away from the containing space, and the second portion is connected to an outer surface of the box body away from the containing space. Through the above scheme, while the sealing portion is clamped between the cover body and the box body, the first portion and the second portion connected to the sealing portion can also better block the gap between the cover body and the box body, which is conducive to improving the sealing effect of the sealing member.

[0009] According to the battery device provided by some embodiments of the present application, the first portion surrounds the opening in a circumferential direction and is attached to an outer surface of the cover body away from the containing space, and the second portion surrounds the opening in a circumferential direction and is attached to an outer surface of the box body away from the containing space, so that the first portion and the second portion can both surround the opening for a whole circle to block the gap between the cover body and the box body, which is conducive to reducing the occurrence of leakage.

[0010] According to the battery device provided by some embodiments of the present application, the cover body comprises a main body portion and a cover portion connected to each other, the cover portion is arranged around the outer periphery of the main body portion, the cover portion is configured as a thermoplastic structure, the cover portion abuts against the box body at the opening edge, and the sealing portion is clamped between the box body and the cover portion. By configuring the cover portion as a thermoplastic structure, the cover portion can be heated and softened, so that the cover portion can more fully and closely contact the sealing portion and the box body. After the cover portion is cooled and solidified again, the cover portion can form a continuous and dense sealing structure with the sealing portion and the box body, which is conducive to improving the sealing effect of the box body.

[0011] According to the battery device provided by some embodiments of the present application, the cover portion is bent towards the box body relative to the main body portion, so that the cover portion can conveniently contact the box body at the opening edge before the main body portion, and the connection between the cover body and the box body is convenient.

[0012] According to the battery device provided by some embodiments of the present application, the main body portion and the cover portion are integrally formed.

[0013] According to the battery device provided by some embodiments of the present application, the thickness of the sealing part is set as D, 0.3mm≤D≤1mm, which not only makes the sealing part have sufficient thickness, so that the sealing part has sufficient structural strength and reduces the possibility of damage to the sealing part during installation, but also makes the thickness of the sealing part not too thick, which not only helps to avoid material waste caused by the thickness of the sealing part being too thick, but also helps to reduce the gap between the box body and the cover caused by the sealing part.

[0014] According to the battery device provided by some embodiments of the present application, the sealing part is configured as a polyethylene structure, a polyether ether ketone structure or a thermoplastic polyurethane elastomer structure.

[0015] According to the battery device provided by some embodiments of the present application, the connecting part is provided with an adhesive layer on the surface of the box, and the connecting part is adhered to the box through the adhesive layer, so that the sealing part can be more firmly fixed to the box, and the possibility of the sealing part falling off the box during assembly can be reduced.

[0016] According to the battery device provided by some embodiments of the present application, the box further comprises a connecting part, and the box body and the cover are detachably connected through the connecting part, which not only makes the box body and the cover be more firmly connected, so that the box has sufficient overall rigidity and impact resistance, but also makes the box body and the cover be easily detachable, so that the devices inside the box can be easily maintained.

[0017] According to the battery device provided by some embodiments of the present application, the connecting part comprises a connecting bolt, the cover is provided with a first connecting hole, the box body is provided with a second connecting hole, and the connecting bolt connects the box body and the cover by penetrating through the first connecting hole and the second connecting hole.

[0018] In the second aspect, some embodiments of the present application provide a power consumption device, which comprises the battery device provided by any of the technical solutions above, and the battery device is used to provide electric energy.

[0019] The technical solutions provided by the embodiments of the present application at least bring the following beneficial effects:

[0020] Some embodiments of this application provide a battery device including a battery cell pack and a housing. The housing includes a main body, a cover, and a sealing element. The main body forms an accommodating space with an opening, in which the battery cell pack is accommodated. The cover closes the opening. The sealing element includes a sealing portion and a connecting portion connected to each other. The sealing portion is sandwiched between the main body and the cover, and the connecting portion extends from between the main body and the cover, with at least a portion connected to the outer surface of the cover facing away from the accommodating space. The accommodating space is under negative pressure. In the above structure, because the sealing portion of the sealing element is sandwiched between the main body and the cover, and the connecting portion extends from between the main body and the cover and is at least partially connected to the outer surface of the cover facing away from the accommodating space, the sealing element can be relatively fixed to the cover during installation by connecting to the outer surface of the cover facing away from the accommodating space. This achieves positioning of the sealing element during installation, reduces the complexity of the installation process, improves the ease of assembly of the battery device, and is beneficial to improving the production efficiency of the battery device. Meanwhile, due to the negative pressure state inside the containment space, under the action of external atmospheric pressure, the cover will press against the box body at the opening, making the sealing part between the box body and the cover fit more tightly against the cover and the box body, which is conducive to improving the sealing ability of the sealing element at the interface between the cover and the box body. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. 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:

[0022] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application;

[0023] Figure 2 This is a schematic diagram showing the disassembled structure of a battery device provided in some embodiments of this application;

[0024] Figure 3 This is a schematic diagram of the internal structure of a battery device provided in some embodiments of this application;

[0025] Figure 4 for Figure 3 Enlarged view at F2;

[0026] Figure 5 This is a schematic diagram of the internal structure of a battery device provided in other embodiments of this application;

[0027] Figure 6 for Figure 5 A magnified view of point F1 in the middle.

[0028] In the picture:

[0029] 1 vehicle; 2 battery device; 3 controller; 4 motor; 5 case; 5a first case portion; 5b second case portion; 5c accommodation space; 5c1 opening; 51 case main body; 52 lid; 521 main body portion; 522 lid portion; 53 seal; 530 cavity; 531 sealing portion; 532 connecting portion; 5321 first portion; 5322 second portion; 533 adhering portion; 7 battery cell group. DETAILED DESCRIPTION

[0030] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0031] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by the skilled person in the field to which the embodiments of the present application belong.

[0032] In the description of the embodiments of the present application, the orientations or positional relationships indicated by 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", "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 indicated 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.

[0033] In addition, the technical terms "first", "second" and the like are only for description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0034] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0035] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, a first feature is "on", "above", or "under" a second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact with an intermediate medium. Moreover, the first feature "over", "above", and "on" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "under", "below", and "under" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0036] At present, from the development of market situation, the application of battery apparatus is more and more extensive. The battery apparatus is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to energy storage container or energy storage cabinet, etc. With the continuous expansion of the application field of battery apparatus, people's requirements for the reliability of battery apparatus are also increasing.

[0037] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0038] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0039] The battery cell can be a secondary battery cell, which refers to a battery cell that can be activated by charging after discharging the active material for continued use.

[0040] The battery cell can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead-acid battery cell, etc.

[0041] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0042] In some embodiments, the battery device can include one or more battery packs, and the battery pack can include one or more battery cell assemblies. As an example, the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body, for example, by a fixing manner. As another example, the battery device includes a plurality of battery packs, and the plurality of battery packs can be connected in series, in parallel, and in a mixed manner.

[0043] As an example, the box body can include a first box body and a second box body. The first box body and the second box body are buckled so that an enclosed space is formed inside the box body to accommodate the battery cell assembly. Here, the enclosed refers to covered or closed, which can be sealed or unsealed. The first box body can be a top cover or a bottom plate.

[0044] As an example, the box body can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are connected with the frame, respectively, so that an enclosed space is formed inside the box body to accommodate the battery cell assembly.

[0045] In some embodiments, the battery device can be used in an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0046] With the continuous expansion of the application range of the battery device in various fields, the demand for the battery device in the market is also increasing. How to improve the production efficiency of the battery device is more and more concerned by the technical personnel in the field. In order to improve the reliability of the battery device, the box body of the battery device is usually made into a structure capable of forming a sealed space to put the battery cell, circuit board, and other devices into the sealed space, so as to reduce the influence of the external environment on these devices and ensure the reliability of their work. Generally, the box body includes an upper cover and a box body connected with each other. In order to ensure the sealing performance of the box body as a whole, the upper cover and the box body need to be sealed by a sealing gasket in some cases, so as to form a continuous and closed sealing line between the upper cover and the box body. However, the installation precision of the sealing gasket has a very important influence on the sealing performance between the upper cover and the box body. During installation, not only time and labor are consumed, but also it is easy to cause leakage hidden trouble in the later period due to the poor consistency of manual operation. These make the battery device inconvenient to assemble and restrict the improvement of the production efficiency of the battery device.

[0047] In order to facilitate the assembly of the battery device and improve the production efficiency of the battery device, some embodiments of the present application provide a battery device, which comprises a battery cell and a box body, the box body comprises a box main body, a cover body and a sealing piece, the box main body forms a containing space with an opening, the battery cell is contained in the containing space, the cover body covers the opening, and the sealing piece comprises a sealing part and a connecting part connected with each other, the sealing part is clamped between the box main body and the cover body, the connecting part extends from between the box main body and the cover body, and at least part of the connecting part is connected to the outer surface of the cover body away from the containing space; the containing space is in a negative pressure state. In the above structure, since the sealing part of the sealing piece is clamped between the box main body and the cover body, the connecting part extends from between the box main body and the cover body and is at least partially connected to the outer surface of the cover body away from the containing space, the relative fixation of the sealing piece and the cover body can be realized by connecting to the outer surface of the cover body away from the containing space during installation, the positioning of the sealing piece during installation is realized, the complexity of the sealing piece during installation is reduced, the assembly of the battery device is facilitated, and the production efficiency of the battery device is improved. At the same time, since the containing space is in a negative pressure state, under the action of the external atmospheric pressure, the cover body will press the box main body at the opening, so that the sealing part between the box main body and the cover body is more closely attached to the cover body and the box main body, which is beneficial to improve the sealing ability of the sealing piece to the interface between the cover body and the box main body.

[0048] The battery device described in the embodiments of the present application is suitable for use in an electric device.

[0049] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc.

[0050] The following embodiments take a vehicle as an example for convenient description.

[0051] Figure 1 A schematic diagram of the vehicle provided in some embodiments of the present application is shown.

[0052] As Figure 1As shown, the vehicle 1 is provided with a battery device 2, which can be arranged at the bottom, head or tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1, for example, the battery device 2 can be used as the operating power source of the vehicle 1.

[0053] The vehicle 1 can further include a controller 3 and a motor 4, the controller 3 being used to control the battery device 2 to supply power to the motor 4, for example, for the power demand of the vehicle 1 during starting, navigation and driving.

[0054] In some embodiments of the present application, the battery device 2 can not only be used as the operating power source of the vehicle 1, but also be used as the driving power source of the vehicle 1, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1.

[0055] Figure 2 A split structure schematic diagram of the battery device provided in some embodiments of the present application is shown. As shown, the battery device 2 includes a box body 5 and a battery cell group 7, the battery cell group 7 being accommodated in the box body 5. The battery cell in the battery cell group 7 can be the smallest unit constituting the battery. Figure 2

[0056] The box body 5 is used to accommodate the battery cell group 7, and the box body 5 can be of various structures. In some embodiments, the box body 5 can include a first box body part 5a and a second box body part 5b, the first box body part 5a and the second box body part 5b being mutually coverable, and the first box body part 5a and the second box body part 5b together defining an accommodation space 5c for accommodating the battery cell group 7. The second box body part 5b can be a hollow structure with one end open, and the first box body part 5a can be a plate-like structure, the first box body part 5a being coverable on the open side of the second box body part 5b to form the box body 5 with the accommodation space 5c; or the first box body part 5a and the second box body part 5b can both be hollow structures with one side open, the open side of the first box body part 5a being coverable on the open side of the second box body part 5b to form the box body 5 with the accommodation space 5c. Of course, the first box body part 5a and the second box body part 5b can be of various shapes, such as a cylinder, a cuboid, etc.

[0057] To improve the sealing performance of the first box body part 5a and the second box body part 5b after being connected, a sealing member, such as sealing glue, a sealing ring, etc., can be arranged between the first box body part 5a and the second box body part 5b.

[0058] Supposing that the first box body part 5a is coverable on the top of the second box body part 5b, the first box body part 5a can also be referred to as an upper box cover, and the second box body part 5b can also be referred to as a lower box body.

[0059] ​In the battery device 2, the battery cell in the battery cell group 7 can be one or multiple. If the battery cell is multiple, the multiple battery cells can be connected in series, in parallel, or in a mixed connection, where the mixed connection means that the multiple battery cells are connected in series and in parallel. The multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the multiple battery cells are accommodated in the box body 5. Alternatively, the multiple battery cells can be connected in series, in parallel, or in a mixed connection to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then the whole is accommodated in the box body 5.

[0060] Some embodiments of the present application provide a battery device, referring to Figures 3 to 6 The battery device 2 includes the battery cell group 7 and the box body 5. The box body 5 includes a box main body 51, a cover body 52, and a sealing member 53. The box main body 51 forms an accommodation space 5c with an opening 5c1. The battery cell group 7 is accommodated in the accommodation space 5c. The cover body 52 covers the opening 5c1. The sealing member 53 includes a sealing portion 531 and a connecting portion 532 connected to each other. The sealing portion 531 is arranged between the box main body 51 and the cover body 52. The connecting portion 532 extends from between the box main body 51 and the cover body 52, and at least part of the connecting portion 532 is connected to an outer surface of the cover body 52 away from the accommodation space 5c. The accommodation space 5c is in a negative pressure state.

[0061] The battery cell in the battery cell group 7 can be a secondary battery cell, which means that the battery cell can be activated by charging after discharging to continue to be used. The battery cell can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead storage battery cell, etc.

[0062] Exemplarily, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft package battery cell, or a battery cell with other shapes. The prismatic battery cell includes a square battery cell, a blade-shaped battery cell, and a multi-prismatic battery cell, such as a hexagonal battery cell, etc.

[0063] When the battery cell group 7 includes multiple battery cells, the multiple battery cells can be arranged and fixed to form a battery module.

[0064] The box body 5 can be a component for providing the accommodation space 5c for accommodating the battery cell group 7, a wire harness, a circuit board, a heat exchange device, etc. inside the battery device 2, so that the box body 5 can provide protection for the battery cell group 7, the wire harness, the circuit board, the heat exchange device, etc.

[0065] The box body can be a main body structure part in the box body, and the cover body can be a structure part matched with the box body, and the two together enclose the containing space. The box body can be the first box body part 5a in the foregoing scheme, or can be the second box body part 5b in the foregoing scheme.

[0066] The box body 51 forms the containing space 5c with the opening 5c1, which can mean that the box body 51 encloses the containing space 5c with one end having the opening 5c1, so that the battery monomer group 7, the wire harness, the circuit board, the heat exchange device and the like can be loaded into the containing space 5c from the opening 5c1 or maintained from the opening 5c1. The cover body 52 can form an independent containing space 5c relative to the outside environment by covering the opening 5c1, so as to protect the battery monomer group 7, the wire harness, the circuit board, the heat exchange device and the like.

[0067] The sealing member 53 can be a member for sealing the covering gap between the cover body 52 and the box body 51, which is used to make the containing space 5c as a sealed space independent of the outside environment. The sealing part 531 and the connecting part 532 are two parts connected with each other in the sealing member 53, wherein the sealing part 531 can be a part clamped between the box body 51 and the cover body 52, and the connecting part 532 can be a part for connecting with the outer surface of the box body 5.

[0068] The sealing part 531 is clamped between the box body 51 and the cover body 52, which can mean that the cover body 52 covers the opening 5c1 by connecting with the box body 51, and the sealing part 531 is clamped by the cover body 52 and the box body 51 to seal and block the gap between the cover body 52 and the box body 51. The connecting part 532 extends from the gap between the box body 51 and the cover body 52, which can mean that the connecting part 532 connected with the sealing part 531 extends outward from the gap between the box body 51 and the cover body 52 to connect with the outer surface of the box body 5.

[0069] Exemplarily, the sealing part 531 can be provided as an elastic structure which can produce elastic deformation. When the sealing part 531 is clamped by the cover body 52 and the box body 51, the sealing part 531 will be deformed by extrusion, and the elastic restoring force of the sealing part 531 will make the sealing part 531 tightly fit the surface of the cover body 52 and the surface of the box body 51.

[0070] At least part of the connecting portion 532 is connected to the outer surface of the cover 52 away from the accommodation space 5c. That is, at least part of the connecting portion 532 is attached to the outer surface of the cover 52 away from the accommodation space 5c, so that the cover 52 can position and fix the sealing member 53 through the connection with the connecting portion 532, reduce the position deviation of the sealing member 53 during installation, reduce the complexity of the sealing member 53 during installation, and facilitate the convenience and installation precision of the sealing member 53. For example, all of the connecting portion 532 can be attached to the outer surface of the cover 52 away from the accommodation space 5c, or part of the connecting portion 532 can be attached to the outer surface of the cover 52 away from the accommodation space 5c, and the other part can be attached to the outer surface of the box body 51 away from the accommodation space 5c.

[0071] The accommodation space 5c is in a negative pressure state. That is, the accommodation space 5c is vacuumized by a vacuumizing device, so that the air pressure in the accommodation space 5c is lower than the atmospheric pressure. Under the action of the atmospheric pressure, the cover 52 and the box body 51 are pressed tightly, and the sealing portion 531 can be more closely attached to the cover 52 and the box body 51, which facilitates the sealing ability of the sealing member 53 to the interface between the cover 52 and the box body 51.

[0072] In the above structure, the sealing portion 531 of the sealing member 53 is clamped between the box body 51 and the cover 52, and the connecting portion 532 extends from between the box body 51 and the cover 52 and is at least partially connected to the outer surface of the cover 52 away from the accommodation space 5c. Therefore, the sealing member 53 can be relatively fixed to the cover 52 by being attached to the outer surface of the cover 52 away from the accommodation space 5c during installation, the positioning of the sealing member 53 during installation is achieved, the complexity of the sealing member 53 during installation is reduced, the convenience of the assembly of the battery device 2 is improved, and the production efficiency of the battery device 2 is facilitated. Meanwhile, the accommodation space 5c is in a negative pressure state, and under the action of the atmospheric pressure, the cover 52 will press the box body 51 at the opening 5c1 tightly, so that the sealing portion 531 between the box body 51 and the cover 52 is more closely attached to the cover 52 and the box body 51, which facilitates the sealing ability of the sealing member 53 to the interface between the cover 52 and the box body 51.

[0073] In some embodiments, continuing to refer to Figure 3 and Figure 4 The sealing member 53 further comprises an attaching portion 533 connected to the sealing portion 531 and the connecting portion 532 and extending from between the box body 51 and the cover 52. The attaching portion 533, the sealing portion 531, and the connecting portion 532 enclose a cavity 530, the cover 52 is accommodated in the cavity 530, the attaching portion 533 is attached to the surface of the cover 52 facing the accommodation space 5c, the connecting portion 532 is attached to the outer surface of the cover 52 away from the accommodation space 5c, and the cavity 530 is in a negative pressure state.

[0074] The fitting part 533 can be a structure part of the sealing member 53 attached to the surface of the cover 52 facing the accommodation space 5c, which is connected with the sealing part 531 and the connecting part 532 and extends from between the box body 51 and the cover 52, so that the sealing member 53 composed of the fitting part 533, the sealing part 531 and the connecting part 532 is an integral structure. The fitting part 533, the sealing part 531 and the connecting part 532 enclose the cavity 530, which can mean that the fitting part 533, the sealing part 531 and the connecting part 532 are connected to each other to enclose the sealing member 53 with the cavity 530. Among them, the cavity 530 can be a space for accommodating the cover 52. Exemplarily, the sealing member 53 composed of the fitting part 533, the sealing part 531 and the connecting part 532 can be a bag-shaped member.

[0075] The cover 52 is accommodated in the cavity 530, which can mean that the cover 52 is wrapped by the sealing member 53, and the cover 52 is loaded into the cavity 530 enclosed by the sealing member 53 without being exposed from the sealing member 53, which makes the installation of the sealing member 53 more simple and convenient by loading the cover 52 into the cavity 530 of the sealing member 53 when installing the sealing member 53.

[0076] Exemplarily, after the cover 52 is loaded into the cavity 530 of the sealing member 53, the loading port of the sealing member 53 for loading the cover 52 can be sealed by using a sealing device, or a self-sealing structure can be provided at the loading port of the sealing member 53 for loading the cover 52, and after the cover 52 is loaded from the loading port of the sealing member 53, the loading port is sealed by using the self-sealing structure of the sealing member 53.

[0077] The fitting part 533 is attached to the surface of the cover 52 facing the accommodation space 5c, which can mean that the fitting part 533 is attached to the surface of the cover 52 facing the accommodation space 5c. The connecting part 532 is attached to the outer surface of the cover 52 away from the accommodation space 5c, which can mean that the connecting part 532 is attached to the outer surface of the cover 52 away from the accommodation space 5c. By attaching the fitting part 533 to the surface of the cover 52 facing the accommodation space 5c and attaching the connecting part 532 to the outer surface of the cover 52 away from the accommodation space 5c, the sealing member 53 can be relatively positioned with the cover 52, so that when the cover 52 is closed on the opening 5c1, the sealing part 531 in the sealing member 53 can move synchronously with the cover 52 and be clamped between the cover 52 and the box body 51, reducing the process of manually adjusting the sealing part 531 between the cover 52 and the box body 51 and reducing the complexity of the installation process of the sealing member 53.

[0078] The cavity 530 is in a negative pressure state, so that under the action of the external atmospheric pressure, the fitting part 533, the sealing part 531 and the connecting part 532 are tightly attached to the surface of the cover body 52, not only enabling the fitting part 533, the sealing part 531 and the connecting part 532 to be connected to the cover body 52, but also reducing the gap between the sealing element 53 and the cover body 52 and reducing the space occupied by the sealing element 53.

[0079] In some embodiments, with continued reference to Figure 5 and Figure 6 The connecting part 532 includes a first part 5321 and a second part 5322, and the first part 5321 and the second part 5322 are respectively connected to both ends of the sealing part 531 in the arrangement direction of the cover body 52 and the box body 51, the first part 5321 is connected to the outer surface of the cover body 52 away from the accommodation space 5c, and the second part 5322 is connected to the outer surface of the box body 51 away from the accommodation space 5c.

[0080] The first part 5321 and the second part 5322 can be two part structures in the connecting part 532, both of which extend from between the box body 51 and the cover body 52. The first part 5321 and the second part 5322 are respectively connected to both ends of the sealing part 531 in the arrangement direction of the cover body 52 and the box body 51, and can be that the first part 5321 and the second part 5322 are both connected to the sealing part 531 and are respectively located at both ends of the sealing part 531 in the arrangement direction of the cover body 52 and the box body 51, so that the first part 5321 and the second part 5322 can respectively extend to the direction of the cover body 52 and the box body 51, so as to make the first part 5321 obtain a larger attached connection area with the cover body 52 and make the second part 5322 obtain a larger attached connection area with the box body 51.

[0081] The first part 5321 is connected to the outer surface of the cover body 52 away from the accommodation space 5c, which can mean that the first part 5321 is attached and connected to the outer surface of the cover body 52 away from the accommodation space 5c. The second part 5322 is connected to the outer surface of the box body 51 away from the accommodation space 5c, which can mean that the second part 5322 is attached and connected to the outer surface of the box body 51 away from the accommodation space 5c.

[0082] Through the above scheme, while the sealing part 531 is clamped between the cover body 52 and the box body 51, the first part 5321 and the second part 5322 connected to the sealing part 531 can also better block the gap between the cover body 52 and the box body 51, which is conducive to improving the sealing effect of the sealing element 53.

[0083] In some embodiments, the first portion 5321 is circumferentially wrapped around the opening 5c1 and attached to the outer surface of the cover 52 facing away from the accommodation space 5c, and the second portion 5322 is circumferentially wrapped around the opening 5c1 and attached to the outer surface of the box body 51 facing away from the accommodation space 5c.

[0084] The first portion 5321 circumferentially wrapped around the opening 5c1 and attached to the outer surface of the cover 52 facing away from the accommodation space 5c can mean that the first portion 5321 extends circumferentially along the opening 5c1, and the first portion 5321 extending circumferentially along the opening 5c1 is arranged in a circumferential manner, so that the first portion 5321 can wrap around the opening 5c1 for a full circle to block the gap between the cover 52 and the box body 51, which is conducive to reducing the occurrence of leakage.

[0085] The second portion 5322 circumferentially wrapped around the opening 5c1 and attached to the outer surface of the box body 51 facing away from the accommodation space 5c can mean that the second portion 5322 extends circumferentially along the opening 5c1, and the second portion 5322 extending circumferentially along the opening 5c1 is arranged in a circumferential manner, so that the second portion 5322 can wrap around the opening 5c1 for a full circle to block the gap between the cover 52 and the box body 51, which is conducive to reducing the occurrence of leakage.

[0086] In some embodiments, the cover 52 comprises a main body part 521 and a cover part 522 connected to each other, and the cover part 522 is bent relative to the main body part 521, the cover part 522 is configured as a thermoplastic structure, the cover part 522 covers the opening 5c1, and the sealing part 531 is clamped between the box body 51 and the cover part 522.

[0087] The main body part 521 and the cover part 522 are two parts connected to each other in the cover 52, wherein the main body part 521 is a main structure part in the cover 52, and the cover part 522 is a structure part arranged circumferentially around the outer periphery of the main body part 521. Since the cover part 522 is arranged circumferentially around the outer periphery of the main body part 521, the cover part 522 can be in contact with the box body 51 at the edge of the annular opening 5c1.

[0088] The sealing part 531 is clamped between the box body 51 and the cover part 522, which can mean that the sealing part 531 is arranged on the side of the box body 51 at the edge of the annular opening 5c1 close to the cover part 522, and is clamped by the box body 51 and the cover part 522.

[0089] The cover joint 522 is configured as a thermoplastic structure, which means that the cover joint 522 is made of a thermoplastic material. Since the thermoplastic material can be repeatedly heated and softened and hardened at a certain temperature range, the cover joint 522 is configured as a thermoplastic structure, so that the cover joint 522 can be heated and softened, so that the cover joint 522 can be more fully attached to the sealing part 531 and the box body 51. After the cover joint 522 is cooled and re-solidified, the cover joint 522 can form a continuous and dense sealing structure with the sealing part 531 and the box body 51, which is beneficial to improve the sealing effect of the box 5.

[0090] Exemplarily, the cover joint 522 can be heated and softened by using a heating device. After the cover joint 522 is attached to the edge of the opening 5c1 of the box body 51, the containing space 5c is vacuumized by using a vacuumizing device, so that the containing space 5c is in a negative pressure state. Under the action of atmospheric pressure, the softened cover joint 522 is tightly attached to the sealing part 531 and the box body 51. After the softened cover joint 522 is re-solidified, the cover joint 522 can form a continuous and dense sealing structure with the sealing part 531 and the box body 51.

[0091] In some embodiments, the cover joint 522 is bent towards the box body 51 relative to the body part 521.

[0092] The cover joint 522 is bent towards the box body 51 relative to the body part 521, which means that the cover joint 522 is bent relative to the body part 521, and the bending direction is towards the box body 51. This makes the cover joint 522 located on the side of the body part 521 close to the box body 51, so that when the cover 52 is close to the opening 5c1 to cover the opening 5c1, the cover joint 522 can conveniently contact the box body 51 at the edge of the opening 5c1 before the body part 521, so that the connection between the cover 52 and the box body 51 is convenient.

[0093] In some embodiments, the body part 521 and the cover joint 522 are integrally formed.

[0094] The body part 521 and the cover joint 522 are integrally formed, which means that the body part 521 and the cover joint 522 are made by casting or other integral forming processing methods, so that the cover 52 can be manufactured synchronously as a whole. This not only makes the processing and manufacturing of the bracket convenient, but also makes the overall structure of the cover 52 have good strength. The body part 521 and the cover joint 522 can also be made by milling or other mechanical processing methods by processing a whole blank, so that the cover 52 has lower processing difficulty and processing cost.

[0095] Exemplarily, the body part 521 and the cover joint 522 are both thermoplastic structures.

[0096] The main body part 521 and the cover part 522 are both thermoplastic structures, which means that the main body part 521 and the cover part 522 are made of the same thermoplastic material, so that the main body part 521 and the cover part 522 can be integrally manufactured synchronously.

[0097] Exemplarily, the main body part 521 and the cover part 522 are made by injection molding, so that the overall structure of the cover 52 has good strength.

[0098] Exemplarily, the main body part 521 and the cover part 522 can be made of polypropylene, polyvinyl chloride, polycarbonate, or the like.

[0099] In some embodiments, the thickness of the sealing part 531 is set as D, 0.3mm≤D≤1mm.

[0100] By setting the thickness D of the sealing part 531 to be D≥0.3mm, the sealing part 531 has sufficient thickness, so that the sealing part 531 has sufficient structural strength, and the possibility of damage to the sealing part 531 during installation is reduced. By setting the thickness D of the sealing part 531 to be D≤1mm, the thickness of the sealing part 531 is not too thick, which not only helps to avoid material waste caused by the thickness of the sealing part 531 being too thick, but also helps to reduce the gap between the box body 51 and the cover 52 caused by the sealing part 531.

[0101] In some embodiments, the sealing member 53 is configured as a polyethylene structure, a polyether ether ketone structure, or a thermoplastic polyurethane elastomer structure.

[0102] The sealing member 53 is configured as a polyethylene structure, a polyether ether ketone structure, or a thermoplastic polyurethane elastomer structure, which means that the sealing member 53 is made of polyethylene, polyether ether ketone, or thermoplastic polyurethane elastomer material, so that the sealing member 53 can be well sealed in the gap between the box body 51 and the cover 52.

[0103] In some embodiments, the connecting part 532 is provided with an adhesive layer (not shown in the figure) on the surface facing the box 5, and the connecting part 532 is adhered to the box 5 through the adhesive layer.

[0104] By providing the adhesive layer on the surface of the connecting part 532 facing the box 5, the connecting part 532 is adhered to the surface of the box 5 through the adhesive layer, so that the sealing member 53 can be fixed more firmly to the box 5, and the possibility of the sealing member 53 falling off the box 5 during assembly can be reduced.

[0105] Exemplarily, the adhesive layer can be made of adhesive glue.

[0106] In some embodiments, the box 5 further comprises a connecting piece (not shown in the figure), and the box body 51 and the cover 52 are detachably connected through the connecting piece.

[0107] The connecting member can be a member for connecting the box body 51 and the cover body 52. The box body 51 and the cover body 52 are detachably connected through the connecting member, not only enabling the box body 51 and the cover body 52 to be more firmly connected, so that the box body 5 has sufficient overall rigidity and impact resistance, but also enabling the box body 51 and the cover body 52 to be conveniently detached, so as to facilitate maintenance of the devices inside the box body 5.

[0108] In some embodiments, the connecting member includes a connecting bolt, the cover body 52 is provided with a first connecting hole (not shown in the figure), the box body 51 is provided with a second connecting hole (not shown in the figure), and the connecting bolt connects the box body 51 and the cover body 52 by passing through the first connecting hole and the second connecting hole.

[0109] The first connecting hole can be a hole structure on the cover body 52. The second connecting hole can be a hole structure on the box body 51. The connecting bolt connects the box body 51 and the cover body 52 by passing through the first connecting hole and the second connecting hole, so that the connecting bolt can lock the box body 51 and the cover body 52, and press the sealing part 531 between the box body 51 and the cover body 52.

[0110] Exemplarily, the first connecting hole and the second connecting hole can both be through holes, the connecting bolt is screw-connected with a nut after passing through the first connecting hole and the second connecting hole, and the nut and the connecting bolt jointly lock the box body 51 and the cover body 52; or the first connecting hole can be a through hole, the second connecting hole can be a threaded hole, the connecting bolt is screw-connected in the second connecting hole after passing through the first connecting hole, and is screw-connected with a nut, the connecting bolt locks the box body 51 and the cover body 52.

[0111] Some embodiments of the present application also provide a power utilization device, which includes the battery device 2 provided by any of the technical solutions above, and the battery device 2 is used to provide electric energy.

[0112] The battery device 2 provided by the embodiments of the present application comprises a battery cell group 7 and a box body 5, the box body 5 comprises a box main body 51, a cover body 52 and a sealing piece 53, the box main body 51 forms a containing space 5c with an opening 5c1, the battery cell group 7 is contained in the containing space 5c, the sealing piece 53 comprises a sealing part 531, a connecting part 532 and a fitting part 533 which are connected with each other, the fitting part 533, the sealing part 531 and the connecting part 532 form a containing cavity 530, the cover body 52 is contained in the containing cavity 530, the containing cavity 530 is in a negative pressure state, the cover body 52 covers the opening 5c1, the sealing part 531 is clamped between the box main body 51 and the cover body 52, the connecting part 532 and the fitting part 533 extend from between the box main body 51 and the cover body 52, the fitting part 533 is attached to a surface of the cover body 52 which faces the containing space 5c, the connecting part 532 is attached to an outer surface of the cover body 52 which faces away from the containing space 5c, and the containing space 5c is in a negative pressure state. In the above structure, since the sealing part 531 of the sealing piece 53 is clamped between the box main body 51 and the cover body 52, and the connecting part 532 extends from between the box main body 51 and the cover body 52 and is at least partially connected to the outer surface of the cover body 52 which faces away from the containing space 5c, the sealing piece 53 can be relatively fixed with the cover body 52 by being connected to the outer surface of the cover body 52 which faces away from the containing space 5c when being installed, the positioning of the sealing piece 53 during installation is realized, the complexity of the sealing piece 53 during installation is reduced, the convenience of assembling the battery device 2 is improved, and the production efficiency of the battery device 2 is improved. At the same time, since the containing space 5c is in a negative pressure state, under the action of the external atmospheric pressure, the cover body 52 will press the box main body 51 at the opening 5c1 tightly, so that the sealing part 531 between the box main body 51 and the cover body 52 is more tightly attached to the cover body 52 and the box main body 51, and the sealing ability of the sealing piece 53 to the interface between the cover body 52 and the box main body 51 is improved.

[0113] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the embodiments of the present application, and they should be covered in the scope of the claims and description of the present application. Especially, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell pack; The enclosure includes a main body, a cover, and a seal. The main body forms an open receiving space in which the battery cell assembly is received. The cover closes to the opening. The seal includes a sealing portion and a connecting portion connected to each other. The sealing portion is sandwiched between the main body and the cover. The connecting portion extends from between the main body and the cover, and at least a portion of the connecting portion is connected to the outer surface of the cover opposite to the receiving space. The receiving space is under negative pressure.

2. The battery device according to claim 1, characterized in that, The sealing element further includes a fitting portion, which is connected to the sealing portion and the connecting portion and extends from between the box body and the cover. The fitting portion, the sealing portion and the connecting portion form a cavity, and the cover is accommodated in the cavity. The fitting portion is attached to the surface of the cover facing the accommodating space, and the connecting portion is attached to the outer surface of the cover away from the accommodating space. The cavity is under negative pressure.

3. The battery device according to claim 1, characterized in that, The connecting part includes a first part and a second part, which are respectively connected to the two ends of the sealing part in the arrangement direction of the cover and the box body. The first part is connected to the outer surface of the cover away from the receiving space, and the second part is connected to the outer surface of the box body away from the receiving space.

4. The battery device according to claim 3, characterized in that, The first part surrounds the opening circumferentially and is attached to the outer surface of the cover away from the receiving space, and the second part surrounds the opening circumferentially and is attached to the outer surface of the box body away from the receiving space.

5. The battery device according to claim 1, characterized in that, The cover includes a main body and a closing part connected to each other. The closing part is disposed around the outer periphery of the main body and is configured as a thermoplastic structure. The closing part abuts against the box body at the edge of the opening. The sealing part is sandwiched between the box body and the closing part.

6. The battery device according to claim 5, characterized in that, The cover portion bends toward the main body of the box relative to the main body portion.

7. The battery device according to claim 5, characterized in that, The main body and the cover are integrally formed.

8. The battery device according to any one of claims 1-7, characterized in that, The thickness of the sealing part is set to D, where 0.3mm ≤ D ≤ 1mm.

9. The battery device according to any one of claims 1-7, characterized in that, The seal is configured as a polyethylene structure, a polyetheretherketone structure, or a thermoplastic polyurethane elastic structure.

10. The battery device according to any one of claims 1-7, characterized in that, The connecting part is provided with an adhesive layer on the surface facing the box body, and the connecting part is bonded to the box body through the adhesive layer.

11. The battery device according to any one of claims 1-7, characterized in that, The enclosure also includes a connector, through which the enclosure body and the cover are detachably connected.

12. The battery device according to claim 11, characterized in that, The connector includes a connecting bolt, the cover has a first connecting hole, the box body has a second connecting hole, and the connecting bolt passes through the first connecting hole and the second connecting hole to connect the box body and the cover.

13. An electrical appliance, characterized in that, The battery device includes any one of claims 1-10, the battery device being used to provide electrical energy.

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