Battery device and power utilization device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries, the battery device comprises a box body and a battery monomer assembly, the box body comprises an injection molding box and a framework, the framework is at least partially embedded into the injection molding box, and the box body is provided with a containing cavity. The battery monomer assembly comprises a battery monomer and is positioned in the accommodating cavity; the injection molding box and the framework are integrally formed through injection molding. The framework is at least partially embedded into the injection molding box, so that the framework embedded into the injection molding box occupies part of space in the injection molding box, and the usage amount of injection molding materials of the injection molding box is reduced. The framework is embedded into the injection molding box body, so that the production cost of the battery device is reduced.

Description

TECHNICAL FIELD

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

[0002] Batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like.

[0003] In the related art, the production cost of a battery device is high. UTILITY MODEL CONTENT

[0004] To solve the above technical problems, the present application provides a battery device and a power utilization device to reduce the production cost of the battery device.

[0005] The present application is implemented by the following technical solutions.

[0006] The present application provides a battery device, comprising:

[0007] A box body comprising an injection molding box and a framework, the framework being at least partially embedded in the injection molding box, the box body having a containing cavity;

[0008] A battery monomer assembly comprising a battery monomer, the battery monomer assembly being located in the containing cavity;

[0009] The injection molding box and the framework are integrally injection molded.

[0010] In the present application, the box body of the battery device comprises an injection molding box and a framework. By embedding the framework at least partially in the injection molding box, the framework itself occupies part of the space in the injection molding box, thereby reducing the amount of injection molding material used in the injection molding box. Embedding the framework in the injection molding box reduces the production cost of the battery device.

[0011] In some embodiments, the injection molding box comprises:

[0012] A main box comprising a containing cavity;

[0013] A beam assembly separating the containing cavity, the beam assembly comprising a first beam, the length direction of the first beam being a first direction, the first beam having a mounting slot extending in the first direction, and the framework being at least partially embedded in the mounting slot.

[0014] In the present application, the first beam has a mounting slot extending in the first direction, and the framework is at least partially embedded in the mounting slot. This not only reduces the amount of material used for injection molding of the first beam, but also allows the embedded framework in the mounting slot to share the load borne by the first beam, thereby facilitating better load bearing of the first beam.

[0015] In some embodiments, the number of the first beams is at least two, the arrangement direction of the at least two first beams is a second direction, the second direction is arranged transversely to the first direction, and the mounting slot of each of the first beams is provided with the framework.

[0016] In the embodiments of the present disclosure, at least two first beams can divide at least more accommodation cavities in the main box for accommodating battery monomers, and the at least two first beams and the framework in the mounting slot of each of the first beams can better support the main box, which is conducive to improving the carrying capacity of the main box.

[0017] In some embodiments, the main box comprises a preset box wall connected with the first beam, the opposite ends of the first beam along the first direction are connected with the preset box wall, and the two ends of the framework along the first direction are respectively arranged in the corresponding preset box wall.

[0018] In the embodiments of the present disclosure, the two ends of the framework along the first direction are respectively arranged in the corresponding preset box wall, part of the framework is embedded in the mounting slot of the first beam of the beam assembly, and part of the framework is embedded in the preset box wall of the main box, so that the framework can be constrained by the first beam and the preset box wall of the main box respectively, so that the framework can share the load of the first beam and the load of the preset box wall of the main box, the load on the injection box can be better transmitted to the framework and carried by the framework, and the carrying capacity of the box body is improved.

[0019] In some embodiments, the box body further comprises a mounting bracket, at least one end of the framework along the first direction is connected with the mounting bracket, and the mounting bracket is located on the side of the preset box wall away from the accommodation cavity along the first direction.

[0020] In the embodiments of the present disclosure, the mounting bracket is located on the side of the preset box wall away from the accommodation cavity along the first direction, that is, the mounting bracket is located outside the box body, and the battery device can be conveniently mounted on the corresponding structure through the mounting bracket outside the box body. At least one end of the framework along the first direction is connected with the mounting bracket, the load acting on the mounting bracket is transmitted to the framework, the load on the mounting bracket is shared by the framework, and the carrying capacity of the battery device is improved.

[0021] In some embodiments, the mounting bracket and the framework are detachably connected.

[0022] In the embodiments of the present disclosure, the mounting bracket and the framework are detachably connected, which is convenient for replacing a more suitable mounting bracket for installation. The installation flexibility of the battery device is high.

[0023] In some embodiments, the framework comprises:

[0024] a frame body, part of which is located in the mounting slot;

[0025] The mounting piece is integrally formed with the frame body, and is located at a side corresponding to the preset box wall away from the accommodating cavity. The mounting bracket is connected with the mounting piece.

[0026] In the embodiments of the present disclosure, the frame body and the mounting piece are integrally formed, the integrality of the frame body and the mounting piece is good, the load acting on the mounting bracket can be well transmitted to the frame body, and the frame body can well share the load. The mounting piece is located at a side corresponding to the preset box wall away from the accommodating cavity, and the mounting piece is convenient to connect with the mounting bracket.

[0027] In some embodiments, the skeleton has a weight-reducing hole.

[0028] In the embodiments of the present disclosure, the skeleton has a weight-reducing hole, which can reduce the material of the skeleton, and is conducive to reducing the weight of the skeleton and saving costs.

[0029] In some embodiments, the skeleton has a locking part and a bearing part, the locking part and the bearing part are alternately arranged along the first direction, and the weight-reducing hole is a blind hole, and the opening direction of the weight-reducing hole on the locking part faces the bottom wall of the main box.

[0030] In the embodiments of the present disclosure, the bearing part and the locking part are uniformly distributed in the first direction, which is conducive to installing the structure needing to be locked in the box according to actual needs on the locking part. The opening direction of the weight-reducing hole on the locking part faces the bottom wall of the main box, and the side surface of the locking part away from the bottom wall is relatively flat, which is conducive to providing a suitable locking position for the locking mechanism in the battery device.

[0031] In some embodiments, the beam assembly further includes a second beam connected with the first beam, the length direction of the second beam is a second direction, the second direction is arranged transversely to the first direction, the locking part is located at the intersection position of the first beam and the second beam, and the battery monomer assembly further includes an end plate connected with the locking part; the first beam and the second beam are arranged to correspond to the accommodating cavity.

[0032] In the embodiments of the present disclosure, the intersection position of the first beam and the second beam is substantially at the edge position of the space accommodating the battery monomer, and the locking part arranged at the intersection position of the first beam and the second beam can well lock the end plate of the battery monomer assembly.

[0033] In some embodiments, the opening direction of the lightening hole on the bearing part is away from the bottom wall of the main box, the number of the battery cells in the battery cell assembly is at least two, the at least two battery cells are arranged along a second direction, the first beam is arranged at at least one end of the battery cell assembly along the second direction, and the projection area of the bearing part along the second direction at least partially overlaps the projection area of the battery cells along the second direction.

[0034] In the embodiments of the present disclosure, the battery cell assembly is provided with the first beam at at least one end along the second direction, and the projection area of the bearing part along the second direction at least partially overlaps the projection area of the battery cells along the second direction, so that the expansion force of the battery cells in the battery cell assembly can act on the bearing part, and the expansion force of the battery cells is buffered by the deformation of the bearing part at the lightening hole. In addition, the opening direction of the lightening hole on the bearing part is away from the bottom wall of the main box, which is beneficial to the deformation buffering of the bearing part at the lightening hole, and is also beneficial to the bearing of the load on the bottom of the main box by the bearing part.

[0035] In some embodiments, the material of the injection molding box can be plastic, and / or the material of the skeleton can be metal.

[0036] In the embodiments of the present disclosure, the injection molding box can be better injection molded by plastic injection molding. The skeleton of metal material is beneficial to improving the bearing capacity of the box.

[0037] In some embodiments, the battery device further comprises a buffer pad connected to the outside of the box.

[0038] In the embodiments of the present disclosure, the external impact is buffered and absorbed by the buffer pad, which is beneficial to better protecting the box and the battery cells in the box and reducing the damage to the box. The buffer pad material is relatively cheap, which is beneficial to reducing the cost.

[0039] The embodiments of the present disclosure provide a power utilization device comprising any of the above battery devices. BRIEF DESCRIPTION OF DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numerals in the drawings indicate the same or similar elements. In the drawings:

[0041] Figure 1 FIG. 1 is a structural schematic diagram of a power utilization device according to an embodiment of the present disclosure;

[0042] Figure 2 An exploded schematic view of a battery device according to an embodiment of the present disclosure;

[0043] Figure 3 A perspective view of a second box according to an embodiment of the present disclosure;

[0044] Figure 4 An exploded schematic view of a battery device according to an embodiment of the present disclosure; Figure 3 An enlarged view of a middle position A;

[0045] Figure 5 An exploded schematic view of a second box according to an embodiment of the present disclosure, showing a sectioning position;

[0046] Figure 6 An enlarged view of a middle position B-B; Figure 5 An enlarged view of a middle position B-B;

[0047] Figure 7 An enlarged view of a middle position C-C; Figure 5 An enlarged view of a middle position C-C;

[0048] Figure 8 An enlarged view of a middle position D; Figure 7 An enlarged view of a middle position D;

[0049] Figure 9 An assembly view of a mounting bracket and a skeleton according to an embodiment of the present disclosure, showing that the projection area of the mounting bracket along a first direction substantially covers the projection area of the mounting member along the first direction;

[0050] Figure 10 An assembly view of a mounting bracket and a skeleton according to an embodiment of the present disclosure, showing that the mounting bracket is deviated to one side of the mounting member along a second direction.

[0051] Explanation of Reference Signs

[0052] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 400, box; 401, first box; 402, second box; 500, battery cell; 1, injection box; 11, main box; 111, preset box wall; 12, beam assembly; 121, first beam; 1211, mounting groove; 122, second beam; 2, skeleton; 21, frame body; 22, mounting member; 23, weight-reducing hole; 24, binding part; 25, bearing part; 3, mounting bracket; 4, accommodating cavity; R1, first direction; R2, second direction; R3, third direction. DETAILED DESCRIPTION

[0053] The embodiments of the technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present disclosure, and therefore cannot be used to limit the protection scope of the present application.

[0054] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the disclosure pertain; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure; the use of the terms "including," "comprising," "having" and variations thereof herein is meant to encompass the items listed thereafter, but does not exclude additional, unrecited items; the terms "a" and "an" herein do not denote a limitation of quantity or an intent to exclude equivalents; the terms "including" and "comprising" are used herein to mean, and are used interchangeably with, the phrase "including at least this, but not excluding additional or different items or implementations".

[0055] In the description of the embodiments of the disclosure, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the disclosure, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0056] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the disclosure. The occurrence of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment to the other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with each other.

[0057] In the description of the embodiments of the disclosure, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are "or" relationship.

[0058] In the description of the embodiments of the disclosure, 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 fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through 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 disclosure can be understood according to the specific circumstances.

[0059] In the description of the embodiments of the disclosure, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, which can be contact between two objects in contact without interaction force, or contact between two objects in contact with interaction force.

[0060] In the related art, the injection molding box of the battery device is a solid structure integrally injection molded. For example, the beams and other structures on the injection molding box are all solid structures integrally injection molded. The framework is not embedded in the injection molding box integrally injection molded, and the injection molding filling at each position of the injection molding box and the framework manufacturing all need corresponding materials, the material usage amount is large, the weight of the battery device is large, and therefore, the production cost of the battery device is high.

[0061] The battery device provided in the embodiments of the present disclosure includes an injection molding box and a framework, and the framework is at least partially embedded in the injection molding box. The framework embedded in the injection molding box itself occupies part of the space in the injection molding box, thereby reducing the usage amount of the injection molding material of the injection molding box. The framework embedded in the injection molding box reduces the production cost of the battery device.

[0062] The scheme that the framework is at least partially embedded in the injection molding box in the embodiments of the present disclosure is not limited to be applied to the battery device, but can also be applied to the electric device.

[0063] The embodiments of the present disclosure provide an electric device, please refer to Figure 1 , which includes a battery device, and the battery device is used for storing or providing electric energy.

[0064] In some embodiments, the electric device further includes a device body, and the battery device is installed on the device body to supply power to the device body.

[0065] The electric device is a device that uses electric energy as energy and realizes corresponding functions by consuming electric energy. Exemplarily, the electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0066] The device body refers to the main structure that consumes electric energy to realize corresponding functions. For example, the electric device can be a mobile phone, and the device body is the part that can realize functions such as communication, and the part that can realize functions such as communication is supplied with power by the battery monomer or the battery device. For example, the electric device can be a car, and the device body is the part that can provide people with seats and can drive on the road, and the part that can provide people with seats and can drive on the road is supplied with power by the battery monomer or the battery device.

[0067] The electric device provided in the embodiments of the present disclosure is taken as a vehicle 1000 for example.

[0068] The vehicle 1000 provided in the embodiments of the present disclosure can be a fuel car, a gas car, or a new energy car, and the new energy car can be a pure electric car, a hybrid car, or a range extended car, etc. Please refer to Figure 1The vehicle 1000 is provided with the battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 can be used to control the battery device 100 to supply power to the motor 300. For example, the battery device 100 can be used for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0069] In the embodiments of the present disclosure, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle 1000.

[0070] In some embodiments, the battery device 100 can be a battery pack.

[0071] In some embodiments, the battery device 100 can be an energy storage device.

[0072] The battery device 100 in the embodiments of the present disclosure includes a battery cell 500. The battery cell 500 is used for storing or providing electric energy.

[0073] In the embodiments of the present disclosure, the battery cell 500 can be a secondary battery, which refers to a battery cell 500 that can be activated by charging after discharging.

[0074] The battery cell 500 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present disclosure is not limited thereto.

[0075] The battery cell 500 includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode and a separator, and the separator is arranged between the negative electrode and the positive electrode. During the charging and discharging process of the battery cell 500, active ions (such as lithium ions) are inserted and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time can allow the active ions to pass through. In some embodiments, the positive electrode can be a positive electrode sheet, which can include a positive electrode current collector and a positive electrode active material arranged on at least one surface of the positive electrode current collector.

[0076] As an example, the positive electrode current collector has two opposite surfaces in the thickness direction of itself, and the positive electrode active material is arranged on any one or both of the two opposite surfaces of the positive electrode current collector.

[0077] As an example, the positive electrode current collector can employ a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver, etc. can be employed. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0078] As an example, the positive electrode active material can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, embodiments of the disclosure are not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material can also be used. These positive electrode active materials can be used alone only one or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFeP04 (which can also be referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnP04), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, lithium cobalt oxide (such as LiCo02), lithium nickel oxide (such as LiNi02), lithium manganese oxide (such as LiMn02, LiMn204), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3Mn 1 / 3 O2 (which can also be referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (which can also be referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (which can also be referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (which can also be referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.8 Co 0.15 Al 0.05O2) and modified compounds thereof. The modified compounds refer to substances obtained by modification means such as doping or coating on the basis of the above-mentioned substances.

[0079] In some embodiments, referring to Figure 2 The battery device 100 further includes a case 400 in which the battery cell 500 is installed.

[0080] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0081] As an example, the negative electrode current collector can employ a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as the metal foil, a pure metal, an alloy, a surface-treated metal, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver, etc. can be employed. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0082] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0083] As an example, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is disposed on either one or both of the two opposite surfaces of the negative electrode current collector.

[0084] As an example, the negative electrode active material can employ a negative electrode active material for the battery cell 500 known in the art. As an example, the negative electrode active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, embodiments of the present disclosure are not limited to these materials, and other conventional materials that can be used as the negative electrode active material for the battery cell 500 can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0085] In some embodiments, the negative electrode can employ a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, or foamed alloy, etc. When the foamed metal is used as the negative electrode sheet, the surface of the foamed metal can not be provided with the negative electrode active material, or can be provided with the negative electrode active material.

[0086] In some embodiments, the negative electrode can employ a foamed carbon.

[0087] As an example, the negative active material can be filled or / and deposited in the negative current collector.

[0088] In some embodiments, the material of the positive current collector can be aluminum, and the material of the negative current collector can be copper.

[0089] In some embodiments, the electrode assembly further comprises a separator, which is arranged between the positive electrode and the negative electrode.

[0090] In some embodiments, the separator is a separator film. The type of the separator film is not particularly limited in the embodiments of the present disclosure, and any known porous structure separator film with good chemical stability and mechanical stability can be selected.

[0091] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride, and ceramic. The separator film can be a single-layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive electrode and the negative electrode, or can be attached to the surface of the positive electrode and the negative electrode. An inorganic particle coating layer, an organic particle coating layer, or an organic / inorganic composite coating layer can also be applied to the surface of the separator film.

[0092] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is arranged between the positive electrode and the negative electrode, and simultaneously functions as ion transmission and separation of the positive electrode and the negative electrode.

[0093] In some embodiments, the battery cell 500 further comprises an electrolyte, which functions as ion conduction between the positive electrode and the negative electrode. The type of the electrolyte is not particularly limited in the embodiments of the present disclosure, and can be selected according to the requirements. The electrolyte can be in a liquid state, a gel state, or a solid state.

[0094] The liquid electrolyte comprises an electrolyte salt and a solvent.

[0095] In some embodiments, the electrolyte salt can be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonylimide, lithium bis-trifluoromethanesulfonylimide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoroboric oxalate, lithium boric oxalate, lithium difluoroboric dioxalate phosphate, and lithium tetrafluoroboric dioxalate phosphate.

[0096] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, butyl sulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be selected from an ether solvent. The ether solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and a crown ether.

[0097] In some embodiments, the electrolyte solution can also include an additive. For example, the additive can include a negative electrode film-forming additive, a positive electrode film-forming additive, and an additive capable of improving certain performance of the battery cell 500, such as an additive capable of improving overcharge / fast charge performance of the battery cell 500, an additive capable of improving high-temperature performance of the battery cell 500, an additive capable of improving low-temperature performance of the battery cell 500, and the like.

[0098] In some embodiments, the gel-state electrolyte includes a polymer as a backbone network and can be used in combination with an ionic liquid-lithium salt.

[0099] In some embodiments, the solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0100] As an example, the polymer of the polymer solid-state electrolyte can include a polyether (polyethylene oxide), a polysiloxane, a polycarbonate, a polyacrylonitrile, a polyvinylidene fluoride, a polymethyl methacrylate, a single-ion polymer, a polyionic liquid, cellulose, or the like.

[0101] As an example, the inorganic solid-state electrolyte can be one or more of an oxide solid-state electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON thin film), a sulfide solid-state electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorous sulfide, argyrodite), amorphous sulfide), and a halide solid-state electrolyte, a nitride solid-state electrolyte, and a hydride solid-state electrolyte.

[0102] As an example, the composite solid-state electrolyte is formed by adding an inorganic solid-state electrolyte filler to a polymer solid-state electrolyte.

[0103] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of a wound structure and a stacked structure.

[0104] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into the wound structure.

[0105] In some embodiments, the electrode assembly is a stack structure.

[0106] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets are alternately stacked.

[0107] As an example, a plurality of positive electrode sheets are provided, and the negative electrode sheet is folded to form a plurality of folded segments which are stacked.

[0108] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded segments which are stacked.

[0109] As an example, a plurality of isolation pieces are provided, and each isolation piece is arranged between any adjacent positive electrode sheet or negative electrode sheet.

[0110] As an example, a plurality of isolation pieces are provided, and each isolation piece is arranged between any adjacent positive electrode sheet or negative electrode sheet.

[0111] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a multi-prism shape, etc.

[0112] In some embodiments, the electrode assembly is provided with a tab, and the tab can guide current out of the electrode assembly. The tab includes a positive tab and a negative tab.

[0113] In some embodiments, referring to Figure 2 , the battery device 100 further includes a box 400, and the battery cell 500 is installed in the box 400.

[0114] As an example, the box 400 can include a first box 401 and a second box 402. The first box 401 and the second box 402 are buckled so that a closed space is formed inside the box 400 to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box 401 can be a top cover or a bottom plate.

[0115] In the battery device 100 of the embodiments of the present disclosure, referring to Figure 3 and Figure 5 , the battery device 100 includes a box 400 and a battery cell assembly. The box 400 includes an injection box 1 and a skeleton 2, and the skeleton 2 is at least partially embedded in the injection box 1. The box 400 has a receiving cavity 4. The battery cell assembly includes a battery cell 500, and the battery cell assembly is located in the receiving cavity 4.

[0116] The box 400 is mainly used to accommodate the battery cell 500 to protect the battery cell 500 and reduce damage to the battery cell 500 from the external environment.

[0117] The injection box 1 is a box-shaped structure formed by an injection molding process using an injection molding material.

[0118] The injection molding material is mainly a material that can be applied to the injection molding process.

[0119] Exemplarily, the injection molding box 1 and the skeleton 2 are integrally injection molded. That is, the skeleton is molded together with the injection molding box during the injection molding process of the injection molding box.

[0120] Exemplarily, the skeleton 2 is placed in the mold, and the skeleton 2 is molded together with the injection molding box during the injection molding process of the injection molding box 1 by the mold.

[0121] Exemplarily, the battery cell assembly includes at least two battery cells 500, which are connected in series, in parallel, or in a hybrid manner. The hybrid manner refers to both series connection and parallel connection.

[0122] Exemplarily, the injection molding material can be a thermoplastic material, a thermosetting material, or a partial fiber composite material.

[0123] Exemplarily, the injection molding material can be plastic, and the thermoplastic material is one of the plastics. The injection molding material can also be other materials besides plastic.

[0124] Plastic refers to a material that mainly contains resin (or monomers directly polymerized in the processing process) and additives, and can be formed by flowing during processing. For example, plastic can be molded into a certain shape under certain temperature and pressure conditions, and the shape remains basically unchanged at room temperature. Plastic does not contain fibers and adhesives.

[0125] The battery device 100 stores or provides electrical energy through the battery cells 500 in the accommodation cavity 4.

[0126] In the embodiments of the present disclosure, the box body 400 of the battery device 100 includes the injection molding box 1 and the skeleton 2. By embedding the skeleton 2 at least partially into the injection molding box 1, the skeleton 2 embedded in the injection molding box 1 itself occupies part of the space in the injection molding box 1, reducing the amount of injection molding material used in the injection molding box 1. Embedding the skeleton 2 into the injection molding box 1 reduces the production cost of the battery device 100.

[0127] In some embodiments, referring to Figure 3 and Figure 4 , the injection molding box 1 includes a main box 11 and a beam assembly 12. The main box 11 includes the accommodation cavity 4. The beam assembly 12 divides the accommodation cavity 4, and the beam assembly 12 includes a first beam 121, the length direction of the first beam 121 is a first direction R1, the first beam 121 has a mounting groove 1211 extending along the first direction R1, and the skeleton 2 is at least partially embedded in the mounting groove 1211.

[0128] Exemplarily, the beam assembly 12, the main box 11, and the skeleton 2 are integrally injection molded.

[0129] Exemplarily, the main box 11 is integrally formed with the beam assembly 12. The main box 11 and the beam assembly 12 are not two independently manufactured structures.

[0130] Integrally formed is formed as a whole with the same material.

[0131] Exemplarily, the main box 11 and the beam assembly 12 are both made of plastic.

[0132] Exemplarily, the beam assembly 12 and the main box 11 are integrally formed in the process of integrally injection molding the beam assembly 12, the main box 11 and the skeleton 2.

[0133] Exemplarily, the beam assembly 12 and the main box 11 can be integrally injection molded with the skeleton 2 respectively. For example, the beam assembly 12 is integrally injection molded with the skeleton 2, the main box 11 is integrally injection molded with the skeleton 2, and the beam assembly 12 and the skeleton 2 can not be integrally formed.

[0134] In the embodiments of the present disclosure, the first beam 121 has a mounting groove 1211 extending along the first direction R1, and the skeleton 2 is at least partially embedded in the mounting groove 1211, not only making the material used for injection molding of the first beam 121 less, but also enabling the skeleton 2 embedded in the mounting groove 1211 to share the load borne by the first beam 121, which is conducive to better bearing of the first beam 121.

[0135] It can be understood that the arrangement of the skeleton 2 is not limited. Exemplarily, the skeleton 2 can be partially embedded in the main box 11.

[0136] In some embodiments, referring to Figure 3 and Figure 4 , the number of the first beams 121 is at least two, the arrangement direction of the at least two first beams 121 is the second direction R2, the second direction R2 is arranged crosswise to the first direction R1, and the mounting groove 1211 of each first beam 121 is provided with the skeleton 2.

[0137] Exemplarily, the number of the first beams 121 can be three.

[0138] Exemplarily, the at least two first beams 121 are arranged at intervals along the first direction R1.

[0139] Exemplarily, the first direction R1 and the second direction R2 are perpendicular.

[0140] Exemplarily, the large face of the battery monomer 500 is perpendicular to the first direction R1.

[0141] Exemplarily, at least two battery monomers 500 are arranged between the two adjacent first beams 121, and all the battery monomers 500 between the two adjacent first beams 121 are arranged along the first direction R1. The first beam 121 can better bear the expansion force of the battery monomer 500.

[0142] In the embodiments of the present disclosure, the at least two first beams 121 can divide more space for accommodating the battery monomers 500 in the accommodating cavity 4 in the main box 11, and the at least two first beams 121 and the framework 2 in the mounting groove 1211 of each first beam 121 can better support the main box 11, which is conducive to improving the carrying capacity of the main box 11.

[0143] It can be understood that the number of the first beams 121 is not limited. For example, the number of the first beams 121 can be one. For example, the number of the first beams 121 is at least two, the mounting groove 1211 of part of the first beams 121 is provided with the framework 2, and the mounting groove 1211 of part of the first beams 121 is not provided with the framework 2, and the corresponding mounting groove 1211 is vacant.

[0144] In some embodiments, referring to Figure 3 , the main box 11 comprises a preset box wall 111 connected with the first beam 121, the first beam 121 is connected with the preset box wall 111 at opposite ends along the first direction R1, and the framework 2 is respectively arranged in the corresponding preset box wall 111 at both ends along the first direction R1.

[0145] For example, the preset box wall 111 is a side wall of the main box 11.

[0146] For example, the main box 11 further comprises a bottom wall, and the bottom wall is used for carrying the battery monomers 500.

[0147] For example, the bottom wall and the battery monomers 500 are arranged along a third direction R3, and the third direction R3 is arranged transversely to the first direction R1 and the second direction R2.

[0148] For example, the box body 400 comprises a first box body 401 and a second box body 402, and the battery monomers 500 are located in a space enclosed by the first box body 401 and the second box body 402.

[0149] For example, the second box body 402 comprises an injection molding box 1 and a framework 2, and the accommodating cavity 4 is located in the second box body 402, the first box body 401 covers the accommodating cavity 4 of the injection molding box 1, and the second box body 402 is connected with the first box body 401.

[0150] For example, the first box body 401 and the second box body 402 are arranged along the third direction R3.

[0151] For example, the first box body 401 is located on a side of the battery monomers 500 away from the bottom wall of the main box 11 along the third direction R3.

[0152] For example, the bottom wall is connected to a side of the preset box wall 111 along the third direction R3.

[0153] Exemplarily, the bottom wall is connected to one side of the preset box wall 111 away from the first cabinet 401 along the third direction R3.

[0154] In the embodiments of the present disclosure, the two ends of the skeleton 2 along the first direction R1 are respectively arranged in the corresponding preset box wall 111, and the skeleton 2 is partially embedded in the mounting groove 1211 of the first beam 121 of the beam assembly 12 and partially embedded in the preset box wall 111 of the main box 11, so that the skeleton 2 can be constrained by the first beam 121 and the preset box wall 111 of the main box 11 respectively, and the skeleton 2 can share the load of the first beam 121 and the load of the preset box wall 111 of the main box 11, so that the load on the injection box 1 can be well transmitted to the skeleton 2 and borne by the skeleton 2, which is beneficial to improve the load bearing capacity of the cabinet 400.

[0155] It can be understood that the arrangement of the skeleton 2 is not limited. Exemplarily, the skeleton 2 is located between the two ends of the preset box wall 111 along the first direction R1, and the skeleton 2 is not arranged in the preset box wall 111.

[0156] In some embodiments, referring to Figure 3 and Figure 6 , the preset box wall 111 is partially located on the slot side of the mounting groove 1211 to limit the skeleton 2 from being taken out of the mounting groove 1211 from the slot, and the opening direction of the slot of the mounting groove 1211 is arranged transversely to the first direction R1.

[0157] The slot side of the mounting groove 1211, that is, the side corresponding to the opening direction of the slot of the mounting groove 1211.

[0158] For example, the opening direction of the slot of the mounting groove 1211 is the side of the mounting groove 1211 along the third direction R3, and the preset box wall 111 is partially located on the slot side of the mounting groove 1211, that is, the preset box wall 111 is partially located on the upper side of the mounting groove 1211 along the third direction R3. For example, the opening direction of the slot of the mounting groove 1211 is upward, and the preset box wall 111 is partially located on the slot side of the mounting groove 1211, that is, the preset box wall 111 is partially located on the upper side of the mounting groove 1211.

[0159] Exemplarily, the opening direction of the slot of the mounting groove 1211 is toward the first cabinet 401.

[0160] Exemplarily, the opening direction of the slot of the mounting groove 1211 can be perpendicular to the first direction R1.

[0161] Exemplarily, the opening direction of the slot of the mounting groove 1211 can be the side of the mounting groove 1211 along the second direction R2.

[0162] Exemplarily, the preset box wall 111 is sleeved on the skeleton 2.

[0163] Exemplarily, the mounting groove 1211 is open at the groove side, and the preset box wall 111 is not present at the groove side of the mounting groove 1211.

[0164] In some embodiments, referring to Figure 3 , Figure 5 , Figure 6 , Figure 9 and Figure 10 , the box body 400 further comprises a mounting bracket 3, and the skeleton 2 is connected with the mounting bracket 3 at at least one end in the first direction R1, and the mounting bracket 3 is located at a side of the preset box wall 111 away from the accommodating cavity 4 in the first direction R1.

[0165] The mounting bracket 3 is mainly used to bear the load of the battery device 100, and the battery device 100 is mounted to the corresponding structure through the mounting bracket 3.

[0166] Exemplarily, the box body 400 comprises a second box body 402, and the second box body 402 further comprises the mounting bracket 3.

[0167] Exemplarily, the battery device 100 is mounted to the corresponding structure of the electric device through the mounting bracket 3.

[0168] Exemplarily, the battery device 100 is mounted to the vehicle 1000 through the mounting bracket 3.

[0169] Exemplarily, the battery device 100 is mounted to the device body of the electric device through the mounting bracket 3.

[0170] Exemplarily, the mounting bracket 3 is detachably connected with the skeleton 2.

[0171] Exemplarily, the mounting bracket 3 is bolted with the skeleton 2.

[0172] Exemplarily, the mounting bracket 3 is welded with the skeleton 2.

[0173] In the embodiments of the present disclosure, the mounting bracket 3 is located at a side of the preset box wall 111 away from the accommodating cavity 4 in the first direction R1, that is, the mounting bracket 3 is outside the box body 400, and the battery device 100 can be conveniently mounted to the corresponding structure through the mounting bracket 3 outside the box body 400. The skeleton 2 is connected with the mounting bracket 3 at at least one end in the first direction R1, the load acting on the mounting bracket 3 is transmitted to the skeleton 2, and the load on the mounting bracket 3 is shared by the skeleton 2, which is beneficial to improve the carrying capacity of the battery device 100.

[0174] It can be understood that the structure of the battery device 100 is not limited. Exemplarily, the battery device 100 can not be provided with the mounting bracket 3. Exemplarily, the mounting bracket 3 can be arranged separately from the skeleton 2.

[0175] In some embodiments, the mounting bracket 3 is detachably connected with the skeleton 2.

[0176] Exemplarily, a plurality of mounting brackets 3 of different structures can be provided according to different vehicle models, and a mounting bracket 3 of a type suitable for a vehicle model is selected and installed to the framework 2. When the battery device 100 is replaced to another vehicle model, a mounting bracket 3 of a type suitable for the other vehicle model can be replaced and installed to the framework 2. The versatility of the battery device 100 is improved.

[0177] Exemplarily, the mounting bracket 3 can be customized according to the specific mounting points of different vehicle models. For example, for a SUV (sport utility vehicle) model, a mounting bracket 3 suitable for the body structure of the SUV can be designed. For a sedan, another mounting bracket 3 suitable for the body structure of the sedan can be designed. In this way, the mounting bracket 3 can be matched with the mounting points of different vehicle models.

[0178] By using mounting brackets 3 of different structures, a user can select a suitable mounting bracket 3 according to his own needs and install it to the framework 2 of the box body 400. The installation flexibility is high, the installation process is simplified, and the installation and disassembly can be more convenient.

[0179] At least two types of mounting brackets 3 are alternatively connected with the framework 2. Here, alternatively means that a set of mounting brackets 3 suitable for a vehicle model is selected. For example, six mounting brackets 3 are required when the battery device 100 is installed on a SUV. The structures of the mounting brackets 3 at different mounting points can be the same or different, but the selected set of mounting brackets 3 all need to be suitable for the mounting points of the SUV. One type of mounting bracket 3 is a complete set of mounting brackets 3 suitable for a vehicle model. Different vehicle models are adapted to one type of mounting bracket 3.

[0180] In the embodiments of the present disclosure, the mounting bracket 3 is detachably connected with the framework 2, which facilitates the replacement of different mounting brackets 3 according to actual needs, and makes the installation flexibility of the battery device 100 higher.

[0181] In some embodiments, please refer to Figure 3 and Figure 5 The mounting bracket 3 is connected to both ends of the framework 2 along the first direction R1.

[0182] In the embodiments of the present disclosure, the mounting bracket 3 is connected to both ends of the framework 2, so that the load on the mounting bracket 3 at both ends can be transmitted from both ends of the framework 2 to the framework 2, so that the framework 2 can be more evenly loaded.

[0183] It can be understood that the arrangement of the mounting bracket 3 is not limited. Exemplarily, the mounting bracket 3 is provided at one end of the framework 2, and the other end is not provided with the mounting bracket 3.

[0184] In some embodiments, please refer toFigure 3 、 Figure 5 and Figure 6 , the projection area of the mounting bracket 3 and the projection area of the preset box wall 111 at least partially overlap along the first direction R1.

[0185] Exemplarily, the two ends of the framework 2 are connected with the mounting brackets 3, and the projection area of each end of the mounting bracket 3 at least partially overlaps with the projection area of the corresponding preset box wall 111.

[0186] Exemplarily, the mounting bracket 3 is in the shape of L.

[0187] Exemplarily, the projection area of the mounting bracket 3 and the projection area of the preset box wall 111 are staggered, and there is no overlapping area between the projection area of the mounting bracket 3 and the projection area of the preset box wall 111 along the first direction R1.

[0188] In some embodiments, referring to Figure 3 、 Figure 6 and Figure 9 , the framework 2 comprises a frame body 21 and a mounting piece 22. The frame body 21 is partially located in the mounting groove 1211. The mounting piece 22 is integrally formed with the frame body 21, and the mounting piece 22 is located on the side of the corresponding preset box wall 111 away from the containing cavity 4. The mounting bracket 3 is connected with the mounting piece 22.

[0189] Exemplarily, the projection area of the frame body 21 is located in the projection area of the mounting piece 22, and the projection area of the mounting piece 22 is partially located outside the projection area of the frame body 21. Since the projection area of the frame body 21 is located in the projection area of the mounting piece 22, and the projection area of the mounting piece 22 is partially located outside the projection area of the frame body 21, the cross-sectional area of the mounting piece 22 is larger than that of the frame body 21, so that the mounting piece 22 has a larger mounting surface for mounting the mounting bracket 3, and the mounting bracket 3 can be more conveniently mounted on the mounting piece 22.

[0190] The projection area of the frame body 21 is located in the projection area of the mounting piece 22, and the projection area of the mounting piece 22 is partially located outside the projection area of the frame body 21. The outer contour of the projection area of the mounting piece 22 and the projection area of the frame body 21 does not completely coincide, and the cross-sectional area of the mounting piece 22 is larger than that of the frame body 21.

[0191] The frame body 21 is partially located in the mounting groove 1211, and the mounting piece 22 is located on the side of the corresponding preset box wall 111 away from the containing cavity 4. The frame body 21 is partially embedded in the preset box wall 111.

[0192] Exemplarily, the mounting piece 22 can be at least partially embedded in the preset box wall 111.

[0193] Exemplarily, the mounting member 22 is partially overlapped with the projection area of the corresponding preset box wall 111 in the projection along the first direction R1. The movement of the framework 2 along the first direction R1 can be limited by the mounting member 22 along the first direction R1.

[0194] Exemplarily, one end of the rack body 21 along the first direction R1 is connected with the mounting member 22.

[0195] Exemplarily, the opposite ends of the rack body 21 along the second direction R2 are both connected with the mounting member 22.

[0196] Exemplarily, please refer to Figure 3 , Figure 6 and Figure 9 , the projection area of the mounting member 22 is substantially covered by the projection area of the mounting bracket 3 in the projection along the first direction R1. The projection area of the mounting member 22 is located in the projection area of the mounting bracket 3.

[0197] Exemplarily, please refer to Figure 3 and Figure 10 , the mounting bracket 3 is deviated to one side of the mounting member 22 along the second direction R2.

[0198] In the embodiments of the present disclosure, the rack body 21 and the mounting member 22 are integrally formed, the integrity of the rack body 21 and the mounting member 22 is good, the load acting on the mounting member 22 by the mounting bracket 3 can be well transmitted to the rack body 21, which is conducive to the rack body 21 to well share the load. The mounting member 22 is located on the side of the corresponding preset box wall 111 away from the accommodating cavity 4, which is convenient for the mounting member 22 to be connected with the mounting bracket 3.

[0199] It can be understood that the specific structure of the framework 2 is not limited. Exemplarily, the framework 2 can include the rack body 21 but not the mounting member 22, and the mounting bracket 3 is mounted to the rack body 21.

[0200] In some embodiments, please refer to Figure 3 , Figure 4 , Figure 8 and Figure 9 , the framework 2 has a lightening hole 23.

[0201] Exemplarily, the cross-sectional shape of the lightening hole 23 is rectangular.

[0202] In the embodiments of the present disclosure, the framework 2 has the lightening hole 23, which can reduce the material of the framework 2, and is conducive to reducing the weight of the framework 2 and saving costs.

[0203] It can be understood that the specific structure of the framework 2 is not limited. Exemplarily, the framework 2 can have a solid structure as a whole, and the lightening hole 23 is not arranged on the framework 2.

[0204] In some embodiments, please refer to Figure 3、 Figure 4 、 Figure 8 and Figure 9 The skeleton 2 has a locking portion 24 and a bearing portion 25, the locking portion 24 and the bearing portion 25 are arranged alternately along the first direction R1, the weight-reducing hole 23 is a blind hole, and the opening direction of the weight-reducing hole 23 on the locking portion 24 faces the bottom wall of the main box 11.

[0205] The opening direction of the weight-reducing hole 23 on the locking portion 24 faces the bottom wall of the main box 11, and the side of the locking portion 24 away from the bottom wall of the box body 400 is relatively flat, so that the structure inside the box body 400 can be locked more conveniently.

[0206] Exemplarily, the opening direction of the weight-reducing hole 23 on the bearing portion 25 faces away from the bottom wall of the main box 11.

[0207] Exemplarily, the battery monomer 500 and the bottom wall are arranged along a third direction R3, and the third direction R3 is arranged transversely to the first direction R1 and the second direction R2 respectively.

[0208] Exemplarily, the third direction R3 is perpendicular to the first direction R1 and the second direction R2 respectively, and the first direction R1 and the second direction R2 are perpendicular.

[0209] Exemplarily, at least two battery monomers 500 are arranged between two adjacent first beams 121, and the at least two battery monomers 500 are arranged along the second direction R2. The box body 400 further comprises an expansion beam connected with the skeleton 2 in the mounting groove 1211 of the first beam 121 to bear the expansion force of the battery monomers 500 between the two adjacent first beams 121.

[0210] Exemplarily, the box body 400 comprises a second box body 402, and the second box body 402 further comprises an expansion beam.

[0211] Exemplarily, the skeleton 2 in the mounting groove 1211 of each first beam 121 is connected with an expansion beam.

[0212] Exemplarily, the expansion beam is connected to the side of the locking portion 24 away from the bottom wall.

[0213] The opening direction of the weight-reducing hole 23 on the bearing portion 25 faces away from the bottom wall of the main box 11, and the side of the bearing portion 25 facing the bottom wall is relatively flat, which can better provide rigid support for the injection molding box 1 at the corresponding position.

[0214] Exemplarily, the battery device 100 can be carried by supporting the position corresponding to the bearing portion 25 on the outer side of the box body 400 during transportation of the battery device 100.

[0215] Exemplarily, the carrying fork of the forklift can support the outer side of the box body 400 at a position corresponding to the bearing part 25 to carry the battery device 100.

[0216] In the embodiments of the present disclosure, the bearing parts 25 and the binding parts 24 are uniformly distributed in the first direction R1, which is beneficial to installing the structures that need to be bound in the box body 400 on the binding parts 24 according to actual needs. The opening direction of the weight-reducing holes 23 located on the binding parts 24 is towards the bottom wall of the main box 11, and the side surface of the binding part 24 away from the bottom wall is relatively flat, which is beneficial to providing a suitable binding position for the binding mechanism in the battery device 100.

[0217] Exemplarily, the arrangement of the weight-reducing holes 23 on the framework 2 is not limited. Exemplarily, the opening direction of all the blind holes as the weight-reducing holes 23 on the framework 2 is the same.

[0218] In some embodiments, referring to Figure 3 , Figure 5 and Figure 8 , the beam assembly 12 further comprises a second beam 122 connected with the first beam 121, the length direction of the second beam 122 is a second direction R2, the second direction R2 is arranged transversely to the first direction R1, the binding part 24 is located at the position where the first beam 121 and the second beam 122 intersect, and the battery monomer assembly further comprises an end plate connected with the binding part 24; the first beam 121 and the second beam 122 separate the containing cavity 4.

[0219] Exemplarily, referring to Figure 3 and Figure 5 , the first beam 121 and the second beam 122 separate the containing cavity 4 into six spaces containing the battery monomers 500.

[0220] Exemplarily, the number of the second beams 122 can be at least two.

[0221] Exemplarily, the at least two second beams 122 are arranged along the first direction R1.

[0222] Exemplarily, the end plate abuts against the battery monomer assembly.

[0223] In the embodiments of the present disclosure, the position where the first beam 121 and the second beam 122 intersect is substantially at the edge position of a single space containing the battery monomer assembly, and the binding part 24 arranged at the position where the first beam 121 and the second beam 122 intersect can better bind the end plate of the battery monomer assembly.

[0224] It can be understood that the specific position of the binding part 24 is not limited. Exemplarily, the binding part 24 can be staggered with the intersection position of the first beam 121 and the second beam 122.

[0225] In some embodiments, referring to Figure 3 andFigure 4 The opening direction of the lightening hole 23 on the bearing part 25 is away from the bottom wall of the main tank 11, the number of the battery cells 500 in the battery cell assembly is at least two, the at least two battery cells 500 are arranged along a second direction R2, the second direction R2 is arranged transversely to the first direction R1 and the large face of the battery cell 500 respectively, the battery cell assembly is provided with the first beam 121 at least one end along the second direction R2, and the projection area of the bearing part 25 along the second direction R2 at least partially overlaps the projection area of the battery cell 500 along the second direction R2.

[0226] It should be noted that the large face of the battery cell 500 refers to the surface with the largest area among the outer surfaces of the battery cell 500.

[0227] The main action direction of the expansion force of the battery cell 500 in the working process is arranged transversely to the large face of the battery cell 500.

[0228] Exemplarily, the second direction R2 is perpendicular to the first direction R1.

[0229] Exemplarily, the second direction R2 is perpendicular to the large face of the battery cell 500.

[0230] Exemplarily, the large face of the battery cell 500 is parallel to the first direction R1.

[0231] Exemplarily, the lightening hole 23 on the bearing part 25 is empty.

[0232] In the embodiments of the present disclosure, the battery cell assembly is provided with the first beam 121 at least one end along the second direction R2, and the projection area of the bearing part 25 along the second direction R2 at least partially overlaps the projection area of the battery cell 500 along the second direction R2, so that the expansion force of the battery cell 500 in the battery cell assembly can act on the bearing part 25, and the expansion force of the battery cell 500 is buffered through the deformation of the bearing part 25 at the lightening hole 23. In addition, the opening direction of the lightening hole 23 on the bearing part 25 is away from the bottom wall of the main tank 11, which is beneficial on the one hand for the bearing part 25 to better deform and buffer at the lightening hole 23, and on the other hand for the bearing part 25 to bear the load outside the bottom of the main tank 11.

[0233] It can be understood that the position of the bearing part 25 is not limited. Exemplarily, the projection area of the bearing part 25 along the second direction R2 and the projection area of the battery cell 500 along the second direction R2 do not overlap.

[0234] In some embodiments, the material of the injection molding tank 1 can be plastic, and / or the material of the framework 2 can be metal.

[0235] Exemplarily, the framework 2 can be a metal casting.

[0236] In the embodiments of the present disclosure, the injection molding box 1 can be better injection molded by plastic injection molding. The skeleton 2 of metal material is beneficial to improve the carrying capacity of the box body 400.

[0237] It can be understood that the material of the injection molding box 1 is not limited. The material of the skeleton 2 is not limited. For example, the injection molding box 1 can be made of other materials other than plastic. For example, the skeleton 2 can be made of other materials other than metal.

[0238] In some embodiments, the battery device 100 further comprises a buffer pad connected to the outside of the box body 400.

[0239] For example, the material of the buffer pad is mainly wood, and the buffer pad is a wooden pad.

[0240] For example, the buffer pad is located at the bottom of the box.

[0241] For example, the buffer pad is located on the side of the second box body 402 away from the first box body 401.

[0242] For example, the buffer pad is detachably connected with the box body 400. It is convenient to replace and maintain the buffer pad, and has good maintenance economy. When the buffer pad is damaged, the buffer pad can be replaced, and the box body 400 does not need to be replaced.

[0243] In the embodiments of the present disclosure, the buffer pad buffers and absorbs the external impact, which is beneficial to better protect the box body 400 and the battery monomer 500 in the box body 400, and reduce the damage to the box body 400. The buffer pad material is relatively cheap, which is beneficial to reduce the cost.

[0244] In some embodiments, the injection molding box 1 and the skeleton 2 are integrally injection molded.

[0245] The injection molding box 1 and the skeleton 2 are integrally injection molded, that is, the skeleton 2 is molded together with the injection molding box 1 in the process of injection molding of the injection molding box 1.

[0246] For example, the skeleton 2 is placed in the mold, and in the process of injection molding of the injection molding box 1 by the mold, the skeleton 2 is molded together with the injection molding box.

[0247] In the embodiments of the present disclosure, the skeleton 2 and the injection molding box 1 are integrally injection molded and the skeleton 2 is embedded in the injection molding box 1, so that the injection molding box 1 and the skeleton 2 do not need to be provided with additional skeletons 2 after integral injection molding. The skeleton 2 and the injection molding box 1 are integrally injection molded, and the skeleton 2 does not need to be assembled after molding, which improves the production efficiency. After molding, the skeleton 2 does not need to be assembled, which correspondingly reduces the error rate in the assembly process, and is beneficial to improve the product quality.

[0248] The present disclosure provides a battery device 100, which will be described below. Figures 1-10The battery device 100 comprises a box body 400 and a battery cell 500. The box body 400 comprises an injection-molded box 1 and a framework 2, which are integrally injection-molded, and the framework 2 is at least partially embedded in the injection-molded box 1. The box body 400 has a containing cavity 4. The battery cell 500 is located in the containing cavity 4. The injection-molded box 1 comprises a main box 11 and a beam assembly 12. The beam assembly 12 and the main box 11 enclose the containing cavity 4, and the beam assembly 12, the main box 11 and the framework 2 are integrally injection-molded. The beam assembly 12 comprises a first beam 121, the length direction of the first beam 121 is a first direction R1, the first beam 121 has a mounting groove 1211 extending along the first direction R1, and the framework 2 is at least partially embedded in the mounting groove 1211. The battery device 100 further comprises a mounting bracket 3, the mounting bracket 3 is connected to at least one end of the framework 2 along the first direction R1, and the mounting bracket 3 is located on the side of the preset box wall 111 away from the containing cavity 4 along the first direction R1. The mounting bracket 3 has various structures, and the mounting bracket 3 can be selected and matched according to the vehicle type. The battery device 100 further comprises a buffer pad connected to the outside of the box body 400. The buffer pad is usually made of a material with high elasticity and energy absorption performance, which can absorb energy when impacted and convert it into heat energy or other forms of energy to release.

[0249] The above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them. Although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features. Such modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising an injection molding box and a skeleton, the skeleton being at least partially embedded in the injection molding box, the box body having a containing cavity; a battery cell assembly comprising battery cells, the battery cell assembly being located in the containing cavity; the injection molding box and the skeleton are integrally injection molded.

2. The battery device according to claim 1, characterized by The injection molding box comprises: a main box comprising a containing cavity; a beam assembly separating the containing cavity, the beam assembly comprising a first beam, the length direction of the first beam being a first direction, the first beam having a mounting slot extending along the first direction, the skeleton being at least partially embedded in the mounting slot.

3. The battery device of claim 2, wherein The number of the first beams is at least two, the arrangement direction of the at least two first beams being a second direction, the second direction being arranged crosswise to the first direction, and each of the first beams is provided with the skeleton in the mounting slot.

4. The battery device of claim 2, wherein The main box comprises a preset box wall connected with the first beam, the opposite ends of the first beam along the first direction are both connected with the preset box wall, and the two ends of the skeleton along the first direction are respectively provided in the corresponding preset box wall.

5. The battery device of claim 4, wherein, The box body further comprises a mounting bracket, at least one end of the skeleton along the first direction is connected with the mounting bracket, and the mounting bracket is located on the side of the preset box wall away from the containing cavity along the first direction.

6. The battery device of claim 5, wherein The mounting bracket and the skeleton are detachably connected.

7. The battery device of claim 5, wherein The skeleton comprises: a skeleton body partially located in the mounting slot; a mounting piece integrally formed with the skeleton body, the mounting piece being located on the side of the corresponding preset box wall away from the containing cavity, and the mounting bracket being connected with the mounting piece.

8. The battery device of claim 2, wherein The skeleton has a weight-reducing hole.

9. The battery device of claim 8, wherein, The skeleton has a locking portion and a bearing portion, the locking portion and the bearing portion being arranged alternately along the first direction, the weight-reducing hole being a blind hole, and the opening direction of the weight-reducing hole located on the locking portion being towards the bottom wall of the main box.

10. The battery device of claim 9, wherein, The beam assembly further comprises a second beam connected with the first beam, the length direction of the second beam being a second direction, the second direction being arranged crosswise to the first direction, the locking portion being located at the position where the first beam and the second beam intersect, the battery cell assembly further comprising an end plate connected with the locking portion, and the first beam and the second beam separating the containing cavity.

11. The battery device of claim 9, wherein, The opening direction of the weight-reducing hole located on the bearing portion is away from the bottom wall of the main box, the number of the battery cells in the battery cell assembly is at least two, the at least two battery cells being arranged along the second direction, the second direction being arranged crosswise to the first direction and the large face of the battery cell respectively, at least one end of the battery cell assembly along the second direction is provided with the first beam, and the projection area of the bearing portion along the second direction at least partially coincides with the projection area of the battery cell along the second direction.

12. The battery device according to any one of claims 1 to 11, wherein The material of the injection molding box can be plastic, and / or the material of the skeleton can be metal.

13. The battery device according to any one of claims 1 to 11, wherein The battery device further comprises a buffer pad connected on the outside of the box body.

14. An electrical device, comprising: The battery device according to any one of claims 1-13 is used for storing or providing electric current.

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