Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises single batteries, a box body and a first insulating film, a containing bin is formed in the box body, and the single batteries are contained in the containing bin; a first insulating film is arranged on at least part of the wall surface of the accommodating bin, and is used for separating the battery monomers from the wall surface of the accommodating bin; under the conditions of collision, impact and the like, even if the box body deforms and the wall surface of the accommodating bin abuts against the battery monomer in the box body, the first insulating film can also insulate and separate the wall surface of the accommodating bin and the battery monomer, so that the probability of short circuit can be effectively reduced, and the service life of the battery is prolonged. Therefore, the probability of electric leakage caused by contact between the box body and the single battery under the condition of collision impact can be reduced.

Description

Technical Field

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

[0002] During use or transportation, batteries may encounter collisions and impacts. When subjected to collisions and impacts, the beam structure in the battery casing may deform, causing the beam structure to be squeezed into the casing and come into contact with the battery cells inside, which may lead to leakage. Utility Model Content

[0003] The purpose of this application is to provide a battery device and an electrical device that aims to solve the problem that the battery device may deform under impact and come into contact with the internal battery cells, resulting in leakage.

[0004] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0005] In a first aspect, embodiments of this application provide a battery device, including a battery cell, a housing, and a first insulating film. A receiving compartment is formed inside the housing, and the battery cell is housed in the receiving compartment. At least a portion of the walls of the receiving compartment are provided with the first insulating film, which serves to separate the battery cell from the walls of the receiving compartment.

[0006] The beneficial effects of the embodiments of this application are as follows: The battery device provided in the embodiments of this application provides a first insulating film on at least part of the wall of the housing. In the event of a collision or impact, even if the housing is deformed and the wall of the housing comes into contact with the battery cell inside, the first insulating film can still provide insulation and separation between the wall of the housing and the battery cell, thereby effectively reducing the probability of short circuit. Therefore, it can reduce the probability of leakage caused by the housing contacting the battery cell in the event of a collision or impact.

[0007] In some embodiments, the housing includes two first beams disposed opposite each other and two second beams disposed between the two first beams, forming a receiving compartment between the two first beams and the two second beams; the first insulating film includes a first film layer and a second film layer, the first film layer being applied to the wall surface of at least one first beam facing the receiving compartment, and the second film layer being applied to the wall surface of at least one second beam facing the receiving compartment.

[0008] By adopting the above technical solution, when the first beam and the second beam are deformed due to a collision impact, the first membrane layer can provide insulation protection for at least one first beam, and the second membrane layer can provide insulation protection for at least one second beam, thereby effectively reducing the probability of leakage after the collision impact.

[0009] In some embodiments, the housing further includes a bottom plate connected to two first beams, the bottom plate, the two first beams, and the two second beams enclosing a receiving compartment, and a second membrane layer is also applied to the side wall of at least one second beam facing away from the bottom plate.

[0010] By adopting the above-mentioned technical solution, by covering at least one second beam with a second membrane layer on the side facing away from the base plate, the probability of short circuit caused by contact between the exposed surface of the second beam and the charged structure can be effectively reduced.

[0011] In some embodiments, the housing further includes a third beam disposed within the receiving compartment, with the opposite ends of the third beam respectively connected to two first beams; the first insulating film further includes a third film layer, which is applied to the outer surface of the third beam.

[0012] By adopting the above technical solution, when a third beam is installed in the storage compartment, a third film layer can be applied to the outer surface of the third beam to form an insulating protection for the third beam, thereby reducing the probability of leakage when the third beam deforms and contacts the battery cells.

[0013] In some embodiments, the first membrane layer, the second membrane layer, and the third membrane layer are separate structures; or, at least two of the first membrane layer, the second membrane layer, and the third membrane layer are integral structures.

[0014] By adopting the above technical solution, the first film layer, the second film layer, and the third film layer can be a separate structure, so that the first film layer, the second film layer, and the third film layer can be respectively applied to the first beam, the second beam, and the third beam to simplify the operation; or, at least two of the first film layer, the second film layer, and the third film layer can also be an integral structure, so that they can be applied as a whole to at least two of the first beam, the second beam, and the third beam to improve assembly efficiency.

[0015] In some embodiments, the housing further includes a fourth beam disposed within the receiving compartment, with two second beams connected to opposite ends of the fourth beam; the first insulating film further includes a fourth film layer covering the outer surface of the fourth beam.

[0016] By adopting the above technical solution, when a fourth beam is installed in the storage compartment, a fourth film layer can be applied to the outer surface of the fourth beam to form an insulating protection for the fourth beam, thereby reducing the probability of leakage when the fourth beam deforms and contacts the battery cells.

[0017] In some embodiments, the first membrane layer, the second membrane layer, and the fourth membrane layer are separate structures; or, at least two of the first membrane layer, the second membrane layer, and the fourth membrane layer are integral structures.

[0018] By adopting the above technical solution, the first film layer, the second film layer, and the fourth film layer can be a separate structure, so that the first film layer, the second film layer, and the fourth film layer can be respectively applied to the first beam, the second beam, and the fourth beam to simplify the operation; or, at least two of the first film layer, the second film layer, and the fourth film layer can also be an integral structure, so that they can be applied as a whole to at least two of the first beam, the second beam, and the fourth beam to improve assembly efficiency.

[0019] In some embodiments, the elongation of the first insulating film is K1, where 200% ≤ K1 ≤ 1000%.

[0020] By adopting the above technical solution, the first insulating film has better extensibility, so when the box is deformed due to collision and impact, the first insulating film can simultaneously extend and deform to absorb energy. The probability of the first insulating film tearing and breaking is low, so the first insulating film has better insulation protection capability for the wall of the container.

[0021] In some embodiments, the first insulating film is any one of a polyimide film layer, a polyurea film layer, a polyethylene terephthalate film layer, or a composite material film layer.

[0022] By adopting the above technical solution, using any one of the following as the first insulating film: polyimide film, polyurea film, polyethylene terephthalate film, or composite material film, the superior ductility of the film itself can be effectively utilized to achieve the purpose of tear resistance and energy absorption during duct deformation.

[0023] In some embodiments, a plurality of battery cells are arranged sequentially in any direction to form a battery cell assembly; the battery device further includes a second insulating film, and at least one side surface of the battery cell assembly is covered with the second insulating film.

[0024] By adopting the above technical solution, a second insulating film is applied to at least one side surface of the battery cell assembly. When the housing deforms towards the battery cell assembly due to a collision impact, the second insulating film can form an insulating separation between the battery cell assembly and the wall of the housing, thereby further reducing the probability of leakage.

[0025] Secondly, embodiments of this application also provide an electrical device, including the battery device as described above, which is used to provide electrical energy.

[0026] The beneficial effects of the embodiments of this application are as follows: The electrical device provided in the embodiments of this application includes the above-mentioned battery device. When the probability of leakage caused by the above-mentioned battery device due to collision is lower, the probability of leakage of the electrical device is also lower. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0029] Figure 2 Exploded views of battery devices provided in some embodiments of this application;

[0030] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0031] Figure 4 A schematic diagram showing the first insulating film covering the housing of a battery device provided in some embodiments of this application;

[0032] Figure 5 This is an exploded view of a battery device provided in some embodiments of this application;

[0033] Figure 6 This is an exploded structural diagram of another battery device provided in some embodiments of this application.

[0034] The following are the labeling elements in the figure:

[0035] 1000, vehicles;

[0036] 100. Battery assembly; 200. Controller; 300. Motor;

[0037] 10. Box body; 11. First box body; 12. Second box body; 13. Bottom plate; 101. Storage compartment; 111. First beam; 112. Second beam; 113. Third beam; 114. Fourth beam;

[0038] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab; 210. Battery cell assembly;

[0039] 30. First insulating film; 31. First film layer; 32. Second film layer; 33. Third film layer; 34. Fourth film layer. Detailed Implementation

[0040] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0041] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0045] Batteries may encounter impacts during use or transportation. In the event of an impact, the metal beam structure within the battery casing may deform, potentially causing it to press against the individual battery cells and lead to leakage or short circuits.

[0046] Based on the above considerations, in order to solve the problem that the battery casing may deform and come into contact with the internal battery cells, leading to leakage, when the battery cell is subjected to a collision, a battery device is designed. By setting a first insulating film on the wall of the battery device's housing compartment, when the casing deforms towards the housing compartment in the event of a collision with the battery cell, the first insulating film can provide insulation protection for the housing compartment wall and insulate the battery cell from the housing compartment wall, thereby effectively reducing the probability of leakage caused by the casing coming into contact with the battery cell.

[0047] The battery cells disclosed in this application can be used in electrical devices that use battery devices as a power source or in various energy storage systems that use battery devices as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0048] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0049] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0050] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0051] Please refer to Figure 2 , Figure 2This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include a plurality of battery cells 20, which are connected in series, parallel, or mixed connection via a busbar.

[0052] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 20.

[0053] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 into a single module. As an example, the battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0054] In some embodiments, the battery device may be a battery pack, which includes a housing 10 and one or more battery cell assemblies housed in the housing 10.

[0055] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing 10 by fixing the battery module in the housing 10.

[0056] As an example, the battery cell assembly can also be housed in the housing 10 by directly fixing multiple battery cells 20 to the housing 10.

[0057] As an example, the housing 10 may include a first housing 11 and a second housing 12. The first housing 11 and the second housing 12 are fastened together to form a closed space inside the housing 10 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 11 may be a top cover or a bottom plate.

[0058] As an example, the housing 10 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 10 forms an enclosed space to accommodate the battery cell assembly.

[0059] In some embodiments, the housing 10 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 10 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 10 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0060] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 20, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0061] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after the battery cell has been discharged by recharging to activate the active materials.

[0062] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0063] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0064] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved reliability. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0065] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0066] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 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. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0067] According to some embodiments of this application, refer to Figures 4 to 6 This application provides a battery device 100, including a battery cell 20, a housing 10 and a first insulating film 30. A receiving compartment 101 is formed inside the housing 10, and the battery cell 20 is housed in the receiving compartment 101. The first insulating film 30 is disposed on at least a portion of the wall surface of the receiving compartment 101, and the first insulating film 30 is used to separate the battery cell 20 and the wall surface of the receiving compartment 101.

[0068] The housing 10 serves as the outer shell structure of the battery device 100, and it can accommodate, assemble, and protect the battery cells 20. A receiving compartment 101 is formed inside the housing 10; it can be understood that the receiving compartment 101 refers to a portion of the housing 10 used to accommodate the battery cells 20.

[0069] The battery cell 20 is housed within the housing 10; optionally, the battery cell 20 can be fixedly assembled to the wall of the housing 101, for example, by means of adhesive bonding, snap-fitting, or fastener connection. When the housing 101 contains multiple battery cells 20, the multiple battery cells 20 can be electrically connected to each other through electrical connectors (such as copper sheets, aluminum sheets, silver sheets, gold sheets, etc.).

[0070] The first insulating film 30 is a film layer structure with insulating properties. In some embodiments, the first insulating film 30 may also be made of a material with high ductility to reduce the probability of the first insulating film 30 being torn when the housing 10 deforms. Thus, when the housing 10 deforms under collision or impact conditions, the first insulating film 30, which is fixedly disposed on the wall of the internal storage compartment 101 of the housing 10, can stretch and deform synchronously with the deformation of the housing 10. Therefore, the first insulating film 30 can provide insulation separation between the battery cell 20 and the wall of the storage compartment 101 when the housing 10 is deformed, thereby reducing the probability of short circuits and leakage.

[0071] The first insulating film 30 is disposed on at least a portion of the wall surface of the receiving compartment 101; optionally, the first insulating film 30 layer may be disposed on a portion of the wall surface of the receiving compartment 101, for example, on the peripheral side facing the internal battery cell 20; or, the first film layer may also be disposed on the entire wall surface of the receiving compartment 101 to achieve complete protection of the receiving compartment 101.

[0072] Optionally, the first insulating film 30 can be fixed to the surface of the receiving chamber 101 by adhesive bonding, or it can be fixed and covered on the surface of the receiving chamber 101 by various methods such as hot pressing and snap-fit ​​fixing. The first insulating film 30 can be a single integral film structure; or, the first insulating film 30 can be formed by combining multiple independent film structures.

[0073] The battery device 100 provided in this application embodiment provides a first insulating film 30 on at least a portion of the wall surface of the receiving compartment 101. In the event of a collision or impact, even if the housing 10 deforms and the wall surface of the receiving compartment 101 comes into contact with the battery cell 20 inside, the first insulating film 30 can still provide insulation and separation between the wall surface of the receiving compartment 101 and the battery cell 20, thereby effectively reducing the probability of a short circuit. Therefore, it can reduce the probability of leakage caused by the wall surface of the receiving compartment 101 contacting the battery cell 20 in the event of a collision or impact.

[0074] Please refer to Figure 4 and Figure 5In some embodiments, the housing 10 includes two first beams 111 disposed opposite to each other and two second beams 112 disposed between the two first beams 111, forming a receiving compartment 101 between the two first beams 111 and the two second beams 112; the first insulating film 30 includes a first film layer 31 and a second film layer 32, the first film layer 31 covering the wall surface of at least one first beam 111 facing the receiving compartment 101, and the second film layer 32 covering the wall surface of at least one second beam 112 facing the receiving compartment 101.

[0075] The first beam 111 consists of two beams arranged opposite each other on the box 10. In some embodiments, the first beam 111 can serve as a side beam of the box 10. Optionally, the first beam 111 can be a roll-formed beam, a profile beam, or other beam structures.

[0076] The second beam 112 consists of two internal beams arranged opposite each other on the housing 10. The second beam 112 is positioned between the two first beams 111, and the first beams 111 and the second beam 112 can be connected end to end to form a receiving compartment 101 for accommodating the battery cells 20. Optionally, the second beam 112 can be a roll-formed beam, a profile beam, or other beam structures.

[0077] It should be understood that when the first beam 111 and the second beam 112 form a receiving chamber 101, that is, the receiving chamber 101 is the area between the two first beams 111 and the two second beams 112; therefore, the side wall of the two first beams 111 facing each other is the wall of the first beam 111 facing the receiving chamber 101, and the side wall of the two second beams 112 facing each other is the wall of the second beam 112 facing the receiving chamber 101.

[0078] The first insulating film 30 includes a first film layer 31 and a second film layer 32. Understandably, the first film layer 31 is used to cover the wall surface of at least one first beam 111 facing the receiving chamber 101, and the second film layer 32 is used to cover the wall surface of at least one second beam 112 facing the receiving chamber 101. Exemplarily, the first film layer 31 can be adhesively fixedly attached to the surface of the first beam 111, completely covering the wall surface of the first beam 111 facing the receiving chamber 101; the second film layer 32 can be adhesively fixedly attached to the surface of the second beam 112, completely covering the wall surface of the second beam 112 facing the receiving chamber 101.

[0079] Optionally, the first film layer 31 and the second film layer 32 can be separate independent film layer structures; thus, the application and fixing of the first film layer 31 and the second film layer 32 can be performed separately without interference, thereby effectively simplifying the film application operation. Alternatively, the first film layer 31 and the second film layer 32 can be an integral structure, thereby allowing the first film layer 31 and the second film layer 32 to be applied and fixed to the first beam 111 and the second beam 112 simultaneously, improving the film application efficiency.

[0080] With this configuration, when a collision impact causes the first beam 111 and the second beam 112 to deform, the first membrane layer 31 can provide insulation protection for the first beam 111 to reduce the probability of the first beam 111 directly contacting the battery cell 20, and the second membrane layer 32 can provide insulation protection for the second beam 112 to reduce the probability of the second beam 112 directly contacting the battery cell 20, thereby effectively reducing the probability of leakage after a collision impact.

[0081] Please refer to Figure 4 and Figure 5 In some embodiments, the housing 10 further includes a bottom plate 13, which is connected to two first beams 111. The bottom plate 13, the two first beams 111, and the two second beams 112 enclose a receiving compartment 101. The second membrane layer 32 is also covered on the side wall of at least one second beam 112 facing away from the bottom plate 13.

[0082] The second membrane layer 32 covering the wall surface of the second beam 112 facing the receiving chamber 101 and the second membrane layer 32 covering the wall surface of the second beam 112 facing away from the bottom plate 13 can be independent of each other or be an integral structure. Exemplarily, in some embodiments, the two second membrane layers 32 can be an integral structure, and the two second membrane layers 32 are perpendicular to each other, so that they can be simultaneously affixed to the wall surface of the second beam 112 facing the receiving chamber 101 and the wall surface facing away from the bottom plate 13.

[0083] Understandably, the base plate 13 is used to connect to the two first beams 111, and the base plate 13, together with the two first beams 111 and the two second beams 112, forms a receiving compartment 101; thus, when the battery cell 20 is housed in the receiving compartment 101, the battery cell 20 can also be fixedly mounted on the base plate 13 to improve stability. In some embodiments, the housing 10 also includes a top plate, which is connected to the side of the two first beams 111 facing away from the base plate 13, so that the interior of the housing 10 forms a closed space.

[0084] It should be understood that the side of the second beam 112 facing away from the base plate 13 is an exposed wall surface inside the housing 10. Therefore, when the housing 10 deforms due to a collision or impact, the second beam 112 may also deform, and the surface of the second beam 112 facing away from the base plate 13 may come into contact with a live structure inside the housing 10. Thus, by covering at least one wall surface of the second beam 112 facing away from the base plate 13 with a second membrane layer 32, the second beam 112 can be further insulated and protected, thereby further reducing the probability of a short circuit caused by contact between the exposed surface of the second beam 112 and a live structure inside the housing 10.

[0085] Please refer to Figures 4 to 6 In some embodiments, the housing 10 further includes a third beam 113 disposed within the receiving compartment 101, with the two opposite ends of the third beam 113 respectively connected to two first beams 111; the first insulating film 30 further includes a third film layer 33, which is applied to the outer surface of the third beam 113.

[0086] The third beam 113 is an internal beam structure disposed within the receiving compartment 101. Optionally, the number of third beams 113 can be one, two, or more. The two opposite ends of the third beam 113 are respectively connected to two first beams 111. The third beam 113 can be parallel to the second beam 112, or it can be non-parallel to the second beam 112. The third beam 113 can be a roll-formed beam, a profile beam, or other beam structures.

[0087] The first insulating film 30 also includes a third film layer 33; it is understood that the third film layer 33 is part of the first insulating film 30, and the third film layer 33 is used to form an insulating protection for the surface of the third beam 113. The third film layer 33 can be fixed to the surface of the third beam 113 by adhesive bonding, or the third film layer 33 can also be applied to the surface of the third beam 113 by means of hot pressing, snap-fit ​​connection, etc.

[0088] Optionally, the third membrane layer 33 can be an independent membrane structure, that is, the third membrane layer 33 can be fixed separately to the surface of the third beam 113; or, the third membrane layer 33 can be an integral structure with the first membrane layer 31, so that the first membrane layer 31 and the third membrane layer 33 can be simultaneously applied to the first beam 111 and the connected third beam 113.

[0089] It should be understood that the outer surface of the third beam 113 refers to the exposed wall surface of the third beam 113 in the receiving compartment 101; for example, when the third beam 113 is only connected to the first beam 111, the outer surface of the third beam 113 includes the opposite two side walls of the third beam 113 facing the second beam 112, the wall surface of the third beam 113 facing the bottom plate 13, and the wall surface of the third beam 113 facing away from the bottom plate 13; or, when the third beam 113 is also connected to the bottom plate 13, the outer surface of the third beam 113 includes the opposite two side walls of the third beam 113 facing the second beam 112 and the side wall surface of the third beam 113 facing away from the bottom plate 13.

[0090] For example, in some embodiments, the third film layer 33 is applied to the outer surface of the third beam 113. Specifically, the third film layer 33 is applied to the opposite two side walls of the third beam 113 facing the second beam 112 and to the side wall of the third beam 113 facing away from the bottom plate 13. In this way, when the third beam 113 is deformed due to a collision, the third film layer 33 on the opposite two side walls of the third beam 113 facing the second beam 112 can insulate the third beam 113 from the battery cell 20, and the third film layer 33 on the side wall of the third beam 113 facing away from the bottom plate 13 can insulate the third beam 113 from the charged structure in the housing 101, which can effectively reduce the probability of leakage or short circuit.

[0091] With this configuration, when a third beam 113 is installed inside the housing 101, a third film layer 33 can be applied to the outer surface of the third beam 113 to form an insulating protection for the third beam 113, thereby reducing the probability of leakage when the third beam 113 deforms and contacts the battery cell 20.

[0092] Please refer to Figures 4 to 6 In some embodiments, the first membrane layer 31, the second membrane layer 32, and the third membrane layer 33 are separate structures; or, at least two of the first membrane layer 31, the second membrane layer 32, and the third membrane layer 33 are integral structures.

[0093] In this embodiment, the first film layer 31, the second film layer 32, and the third film layer 33 can be configured as a separate structure, that is, the first film layer 31, the second film layer 32, and the third film layer 33 are independent of each other, such as... Figure 5 As shown. In this way, the first film layer 31 can be attached to the wall surface of the first beam 111, the second film layer 32 can be attached to the wall surface of the second beam 112, and the third film layer 33 can be attached to the wall surface of the third beam 113, thereby simplifying the film application operation.

[0094] Alternatively, in this embodiment, at least two of the first film layer 31, the second film layer 32, and the third film layer 33 may be configured as an integral structure; for example, the first film layer 31 and the second film layer 32 may be an integral structure, or the first film layer 31 and the third film layer 33 may be an integral structure, or the second film layer 32 and the third film layer 33 may be an integral structure, or the first film layer 31, the second film layer 32, and the third film layer 33 may be integrally formed or connected to form a whole, such as... Figure 6 As shown.

[0095] With this configuration, at least two of the first film layer 31, the second film layer 32, and the third film layer 33 can be integrally applied to at least two of the first beam 111, the second beam 112, and the third beam 113, thereby improving the film application efficiency.

[0096] Please refer to Figures 4 to 6 In some embodiments, the housing 10 further includes a fourth beam 114 disposed within the receiving compartment 101, with two second beams 112 connected to opposite ends of the fourth beam 114; the first insulating film 30 further includes a fourth film layer 34 covering the outer surface of the fourth beam 114.

[0097] The fourth beam 114 is an internal beam structure disposed within the receiving compartment 101. Optionally, the number of fourth beams 114 can be one, two, or more. The opposite ends of the fourth beam 114 are respectively connected to two second beams 112. The fourth beam 114 can be parallel to the first beam 111, or it can be non-parallel to the first beam 111. The fourth beam 114 can be a roll-formed beam, a profile beam, or other beam structures.

[0098] The first insulating film 30 also includes a fourth film layer 34; it is understood that the fourth film layer 34 is part of the first insulating film 30, and the fourth film layer 34 is used to form an insulating protection for the surface of the fourth beam 114. The fourth film layer 34 can be fixed to the surface of the fourth beam 114 by adhesive bonding, or the fourth film layer 34 can also be applied to the surface of the fourth beam 114 by means of hot pressing, snap-fit ​​connection, etc.

[0099] Optionally, the fourth membrane layer 34 can be an independent membrane structure, that is, the fourth membrane layer 34 can be fixed separately to the surface of the fourth beam 114; or, the fourth membrane layer 34 can be an integral structure with the second membrane layer 32, so that the second membrane layer 32 and the fourth membrane layer 34 can be simultaneously applied to the second beam 112 and the connected third beam 113.

[0100] It should be understood that the outer surface of the fourth beam 114 refers to the exposed wall surface of the fourth beam 114 in the receiving compartment 101; for example, when the fourth beam 114 is only connected to the second beam 112, the outer surface of the fourth beam 114 includes the opposite side walls of the fourth beam 114 facing the first beam 111, the wall surface of the fourth beam 114 facing the bottom plate 13, and the wall surface of the fourth beam 114 facing away from the bottom plate 13; or, when the fourth beam 114 is also connected to the bottom plate 13, the outer surface of the fourth beam 114 includes the opposite side walls of the fourth beam 114 facing the first beam 111 and the side wall surface of the fourth beam 114 facing away from the bottom plate 13.

[0101] For example, in some embodiments, the fourth film layer 34 is applied to the outer surface of the fourth beam 114. Specifically, the fourth film layer 34 is applied to the opposite two side walls of the fourth beam 114 facing the first beam 111 and to the side wall of the fourth beam 114 facing away from the bottom plate 13. In this way, when the fourth beam 114 is deformed due to a collision, the fourth film layer 34 on the opposite two side walls of the fourth beam 114 facing the first beam 111 can insulate the fourth beam 114 from the battery cell 20, and the fourth film layer 34 on the side wall of the fourth beam 114 facing away from the bottom plate 13 can insulate the fourth beam 114 from the charged structure in the housing 101, which can effectively reduce the probability of leakage or short circuit.

[0102] With this configuration, when a fourth beam 114 is installed inside the housing 101, a fourth film layer 34 can be applied to the outer surface of the fourth beam 114 to form an insulating protection for the fourth beam 114, thereby reducing the probability of leakage when the fourth beam 114 deforms and contacts the battery cell 20.

[0103] In some embodiments, the housing 10 may include a third beam 113 and a fourth beam 114. The third beam 113 and the fourth beam 114 may be distributed intermittently within the housing 101, and mutual interference may be avoided by opening clearance grooves on the third beam 113 or the fourth beam 114. At the same time, a third membrane layer 33 and a fourth membrane layer 34 may be respectively coated on the outer surfaces of the third beam 113 and the fourth beam 114 to reduce the probability of leakage of the housing 10 under collision and impact conditions.

[0104] Please refer to Figures 4 to 6 In some embodiments, the first film layer 31, the second film layer 32, and the fourth film layer 34 are separate structures; or, at least two of the first film layer 31, the second film layer 32, and the fourth film layer 34 are integral structures.

[0105] In this embodiment, the first film layer 31, the second film layer 32, and the fourth film layer 34 can be configured as a separate structure, that is, the first film layer 31, the second film layer 32, and the fourth film layer 34 are independent of each other, such as... Figure 5 As shown. In this way, the first film layer 31 can be attached to the wall surface of the first beam 111, the second film layer 32 can be attached to the wall surface of the second beam 112, and the fourth film layer 34 can be attached to the wall surface of the fourth beam 114, thereby simplifying the film application operation.

[0106] Alternatively, in this embodiment, at least two of the first film layer 31, the second film layer 32, and the fourth film layer 34 can be configured as an integral structure; for example, the first film layer 31 and the second film layer 32 are integral structures, or the first film layer 31 and the fourth film layer 34 are integral structures, or the second film layer 32 and the fourth film layer 34 are integral structures, or the first film layer 31, the second film layer 32, and the fourth film layer 34 are integrally formed or connected to form a whole, such as... Figure 6 As shown.

[0107] With this configuration, at least two of the first film layer 31, the second film layer 32, and the fourth film layer 34 can be integrally applied over at least two of the first beam 111, the second beam 112, and the fourth beam 114, thereby improving the film application efficiency.

[0108] In some embodiments, the first insulating film 30 may simultaneously include a first film layer 31, a second film layer 32, a third film layer, and a fourth film layer 34, such that at least two of the first film layer 31, the second film layer 32, the third film layer, and the fourth film layer 34 can be an integral structure; or, the first film layer 31, the second film layer 32, the third film layer, and the fourth film layer 34 can all be integrally formed or connected to form a whole, such as... Figure 6 As shown.

[0109] Please refer to Figures 4 to 6 In some embodiments, the elongation of the first insulating film 30 is K1, where 200% ≤ K1 ≤ 1000%.

[0110] Elongation refers to the parameter measured according to the test method for elongation in the Chinese national standard GB / T 528-2009. Specifically, elongation is the ratio of the maximum elongation of the sample before fracture to its original length in a tensile test, usually expressed as a percentage.

[0111] In this embodiment, the elongation K1 of the first insulating film 30 is greater than or equal to 200% and less than or equal to 1000%, that is, the ratio of the maximum extended length of the first insulating film 30 to the original length is between 200% and 1000%, thereby the first insulating film 30 has better extensibility.

[0112] Optionally, the elongation K1 of the first insulating film 30 includes, but is not limited to, 200%, 220%, 250%, 270%, 300%, 330%, 350%, 380%, 400%, 410%, 430%, 450%, 470%, 490%, 500%, 510%, 550%, 580%, 600%, 630%, 650%, 680%, 700%, 720%, 750%, 780%, 800%, 810%, 860%, 890%, 900%, 920%, 950%, 970%, 1000%, etc. For example, when the elongation K1 of the first insulating film 30 is 400%, the first insulating film 30 can be stretched and deformed to 4 times its original length without tearing, and the first insulating film 30 has superior ductility.

[0113] With this configuration, the first insulating film 30 has better extensibility, so when the box 10 is deformed due to collision impact, the first insulating film 30 can simultaneously extend and deform to absorb energy, and the probability of the first insulating film 30 tearing or breaking is low, thus the first insulating film 30 has better insulation protection capability for the wall of the receiving chamber 101.

[0114] Please refer to Figures 4 to 6 In some embodiments, the first insulating film 30 is any one of a polyimide film layer, a polyurea film layer, a polyethylene terephthalate film layer, or a composite material film layer.

[0115] It should be understood that polyimide films, polyurea films, polyethylene terephthalate films, or composite films all have good extensibility, meaning they can produce a certain degree of stretching and deformation without tearing.

[0116] The aforementioned composite material membranes include, but are not limited to, membrane structures formed by combining polymer-based materials (such as polyimide, polytetrafluoroethylene, polyethylene, etc.), inorganic materials (such as silica, alumina, titanium dioxide, etc.), high-performance resins (such as epoxy resin, polyester resin), and nanomaterials. Composite material membranes can provide properties such as high-efficiency electrical isolation, high-temperature resistance, and chemical corrosion resistance.

[0117] With this configuration, using any one of the following as the first insulating film 30: polyimide film, polyurea film, polyethylene terephthalate film, or composite material film, the superior ductility of the film itself can be effectively utilized to achieve the purpose of tear resistance and energy absorption during duct deformation.

[0118] Please refer to Figures 4 to 6 In some embodiments, a plurality of battery cells 20 are arranged sequentially in any direction to form a battery cell assembly 210; the battery device 100 also includes a second insulating film (not shown in the figure), and at least one side surface of the battery cell assembly 210 is covered with the second insulating film.

[0119] The second insulating film is a film layer structure with insulating properties; for example, the second insulating film includes, but is not limited to, a polyimide film layer, a polyurea film layer, a polyethylene terephthalate film layer, or a composite material film layer; optionally, the second insulating film and the first insulating film 30 may be made of the same material or different materials.

[0120] Optionally, the elongation of the second insulating film is K2, where 200% ≤ K2 ≤ 1000%; optionally, the elongation of the second insulating film K2 includes, but is not limited to, 200%, 300%, 400%, 500%, 600%, 700%, 800%, 900%, 1000%, etc.; the elongation of the second insulating film K2 can be the same as or different from the elongation of the first insulating film 30 K1.

[0121] At least one surface of the battery cell assembly 210 is covered with a second insulating film; optionally, the second insulating film can be covered on one exposed surface of the battery cell assembly 210, or all surfaces of the battery cell assembly 210 can be covered with the second insulating film. Exemplarily, in some embodiments, one side of the battery cell assembly 210 is fixedly mounted to the base plate 13 of the housing 10, and the terminals of each battery cell 20 are located on the other side of the battery cell assembly 210 facing away from the base plate 13; thus, the second insulating film can be covered on the peripheral side of the battery cell assembly 210 to further separate and protect the battery cell assembly 210 and the wall of the receiving compartment 101, thereby further reducing the probability that the wall of the receiving compartment 101 will contact the battery cells 20 in the battery cell assembly 210 when the housing 10 deforms.

[0122] The second insulating film can be fixed to the surface of the battery cell assembly 210 by adhesive bonding, that is, it can be bonded to the surface of each battery cell 20 in the battery cell assembly 210 to achieve insulation protection for each battery cell 20. Optionally, the second insulating film can be applied to each group of battery cell assemblies 210; or, the second insulating film can be applied to the surface of the outermost battery cell assembly 210 in two or more adjacent battery cell assemblies 210 (that is, the surface of the battery cell assembly 210 adjacent to any one of the first beam 111, the second beam 112, the third beam 113 or the fourth beam 114 facing the beam).

[0123] With this configuration, a second insulating film is applied to at least one side surface of the battery cell assembly 210. When the housing 10 deforms toward the battery cell assembly 210 due to a collision impact, the second insulating film can form an insulating separation between the battery cell assembly 210 and the wall of the housing 101, thereby further reducing the probability of leakage.

[0124] The battery device 100 provided in this application will now be further described according to specific embodiments.

[0125] Please refer to Figure 4 and Figure 5 In this embodiment, the battery device 100 includes a housing 10 and battery cells 20. The housing 10 includes two first beams 111 arranged opposite each other, two second beams 112 disposed between the two first beams 111, a third beam 113 and a fourth beam 114 intersecting between the first beams 111 and the second beams 112, and a base plate 13. The two opposite ends of the two second beams 112 are respectively connected to the two first beams 111. The base plate 13 covers the same side of the first beams 111 and the second beams 112, thereby forming a receiving compartment 101 by the first beams 111, the second beams 112, and the base plate 13. The third beam 113 and the fourth beam 114 are both disposed within the receiving compartment 101. The opposite ends of the third beam 113 are respectively connected to the first beams 111, and the opposite ends of the fourth beam 114 are respectively connected to the second beams 112. The battery cells 20 can be accommodated within the receiving compartment 101.

[0126] The battery device 100 also includes a first insulating film 30, the elongation K1 of which is between 200% and 1000%. The first insulating film 30 includes a first film layer 31, a second film layer 32, a third film layer 33, and a fourth film layer 34. The first film layer 31 is attached to the wall surface of the first beam 111; specifically, it is attached to the wall surface of the two first beams 111 facing each other. The second film layer 32 is attached to the wall surface of the second beam 112; specifically, it is attached to the wall surface of the two second beams 112 facing each other, and to the wall surface of the second beam 112 facing away from the base plate 13. The third film layer 33 is attached to the outer surface of the third beam 113; specifically, it is attached to the opposite side walls of the second beams 112 facing both sides of the third beam 113, and to the wall surface of the third beam 113 facing away from the base plate 13. The fourth film layer 34 is used to be attached to the outer surface of the fourth beam 114; specifically, the fourth film layer 34 is attached to the opposite side walls of the first beam 111 facing both sides of the fourth beam 114, and the side wall of the fourth beam 114 facing away from the bottom plate 13.

[0127] Please refer to Figure 1 and Figure 4 Secondly, embodiments of this application also provide an electrical device, including a battery device 100 as described above, the battery device 100 being used to provide electrical energy.

[0128] The electrical device provided in this application embodiment is, for example, the vehicle 1000 described above. The electrical device includes the battery device 100 described above. When the probability of the battery device 100 leaking electricity due to a collision is lower, the probability of the electrical device leaking electricity is also lower.

[0129] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized by: The battery device comprises: a battery cell; a box body, the box body is internally formed with a containing bin, the battery cell is accommodated in the containing bin; and a first insulation film, at least part of the wall surface of the containing bin is provided with the first insulation film, the first insulation film is used for separating the battery cell and the wall surface of the containing bin.

2. The battery device of claim 1, wherein: The box body comprises two first beams arranged oppositely and two second beams arranged between the two first beams, the containing bin is formed between the two first beams and the two second beams; the first insulation film comprises a first film layer and a second film layer, the first film layer is arranged on the wall surface of at least one of the first beams facing the containing bin, and the second film layer is arranged on the wall surface of at least one of the second beams facing the containing bin.

3. The battery device of claim 2, wherein: The box body further comprises a bottom plate connected to the two first beams, the bottom plate, the two first beams and the two second beams enclose to form the containing bin; the second film layer is further arranged on the wall surface of at least one of the second beams away from the bottom plate.

4. The battery device according to claim 2 or 3, characterized by: The box body further comprises a third beam arranged in the containing bin, opposite ends of the third beam are connected to the two first beams respectively; the first insulation film further comprises a third film layer arranged on the outer surface of the third beam.

5. The battery device of claim 4, wherein: The first film layer, the second film layer and the third film layer are in a split structure; or at least two of the first film layer, the second film layer and the third film layer are in an integrated structure.

6. The battery device of any one of claims 2, 3, 5, wherein: The box body further comprises a fourth beam arranged in the containing bin, opposite ends of the fourth beam are connected to the two second beams respectively; the first insulation film further comprises a fourth film layer arranged on the outer surface of the fourth beam.

7. The battery device of claim 6, wherein: The first film layer, the second film layer and the fourth film layer are in a split structure; or at least two of the first film layer, the second film layer and the fourth film layer are in an integrated structure.

8. The battery device of any one of claims 1-3, 5, 7, wherein: The elongation of the first insulation film is K1, 200%≤K1≤1000%.

9. The battery device of any one of claims 1-3, 5, 7, wherein: The first insulation film is any one of a polyimide film layer, a polyurea film layer, a polyethylene terephthalate film layer or a composite material film layer.

10. The battery device of any one of claims 1-3, 5, 7, wherein: A plurality of the battery cells are sequentially arranged in any direction to form a battery cell assembly; the battery device further comprises a second insulation film, at least one side surface of the battery cell assembly is covered with the second insulation film.

11. An electrical device, characterized by: The battery device comprises any one of claims 1 to 10, and is used for providing electric energy.

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