Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery monomer; the circuit board is electrically connected with the battery monomers; the circuit board shell comprises a first shell and a second shell, and the second shell and the first shell are connected and jointly form an accommodating space for accommodating the circuit board; wherein the first shell comprises a first shell body and two first folded edges connected to the two opposite sides of the first shell body in the first direction, a first sliding groove is formed between each first folded edge and the first shell body, the first sliding grooves extend in the second direction, and the second direction intersects with the first direction; the second shell comprises two first side edges in the first direction, the two first side edges are embedded into the two first sliding grooves respectively, and the second shell is configured to be capable of moving to the position between the two first folded edges along the first sliding grooves. The assembly efficiency and reliability can be improved.

Description

TECHNICAL FIELD

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

[0002] With the rapid development of new energy technology, battery devices have been widely applied in the fields of electronic equipment, electric vehicles, electric two-wheel vehicles, electric tools, etc. With the more and more wide application of battery devices, higher requirements are put forward for the reliability of battery devices. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a battery device and a power utilization device to improve the reliability.

[0004] In a first aspect, the embodiments of the present application provide a battery device, comprising: a battery monomer; a circuit board electrically connected with the battery monomer; a circuit board shell comprising a first shell and a second shell, the second shell being connected with the first shell and jointly forming an accommodating space for accommodating the circuit board; wherein the first shell comprises a first shell body and two first folding edges connected to opposite sides of the first shell body along a first direction, each first folding edge and the first shell body forming a first sliding groove therebetween, the first sliding groove extending along a second direction, the second direction intersecting the first direction; the second shell comprises two first side edges along the first direction, the two first side edges being embedded in the two first sliding grooves respectively, the second shell being configured to be movable along the first sliding groove to between the two first folding edges.

[0005] The circuit board shell is two split first shells and a second shell, the two first folding edges of the first shell form a first sliding groove therebetween respectively, the two first side edges of the second shell are moved along the two first sliding grooves to between the two first folding edges and embedded in the two first sliding grooves respectively, so that the second shell is connected with the first shell to jointly form an accommodating space for accommodating the circuit board, thereby realizing quick installation, improving installation efficiency, eliminating the problem of fracture of the previous integrated folding and buckling type shell in repeated opening and closing, and improving the reliability.

[0006] In some embodiments, one end of the first folding edge is connected with the first shell body, and the other end is a free end; along the first direction, the two first folding edges are bent close to each other.

[0007] Thus, the first folding edge limits the displacement of the second shell along the third direction by limiting the displacement of the second shell along the third direction.

[0008] In some embodiments, the first sliding groove comprises a first groove surface and a second groove surface opposite along a third direction, the third direction, the second direction and the first direction are perpendicular to each other; the first side edge abuts against the first groove surface and the second groove surface.

[0009] Therefore, the second shell and the first shell can be tightly connected, the risk of mutual collision due to shaking is reduced, and the reliability is improved.

[0010] In some embodiments, one end of the first groove surface is connected with the second groove surface, and the distance between the first groove surface and the second groove surface gradually increases along the extension direction of the first folding edge.

[0011] The slot of the first sliding groove has a gradually increasing trend, which facilitates the first side edge to enter the first sliding groove while tightly fitting the first side edge with the first sliding groove, thereby improving the reliability.

[0012] In some embodiments, the first shell body comprises a first surface and a second surface opposite along the third direction; the first folding edge comprises a third surface and a fourth surface opposite along the thickness direction thereof, the third surface is closer to the first surface than the fourth surface, the third surface is the first groove surface, and the first surface is the second groove surface.

[0013] Therefore, the second shell and the first shell can be tightly connected, thereby improving the reliability.

[0014] In some embodiments, the first shell body comprises a first end and a second end along the second direction, and the first shell further comprises a second folding edge connected to the first end; the second shell further comprises a second side edge on one side along the second direction, the second side edge connects the two first side edges, and the second side edge abuts against the second folding edge.

[0015] By arranging the second folding edge on the first shell, the second side edge abuts against the second folding edge, thereby limiting the displacement of the second shell on one side along the second direction, and improving the connection reliability.

[0016] In some embodiments, one end of the second folding edge is connected with the first shell body, and the other end is a free end; along the second direction, the second folding edge is bent towards the second end; a limiting groove is formed between the second folding edge and the first shell body, the limiting groove extends along the first direction, and the second side edge is embedded in the limiting groove.

[0017] The second folding edge is bent towards the second end, and a limiting groove is formed between the second folding edge and the first shell body, and the second side edge is embedded in the limiting groove, which not only limits the displacement of the second shell along the second direction, but also limits the displacement of the second shell along the third direction, thereby improving the reliability of the circuit board shell.

[0018] In some embodiments, the first shell body is further provided with a clamping slot, and the second shell is provided with a protrusion corresponding to the position of the clamping slot; or the first shell body is further provided with a protrusion, and the second shell is provided with a clamping slot corresponding to the position of the protrusion; wherein when the second shell moves between the two first folding edges, the protrusion is embedded in the clamping slot.

[0019] When the second shell moves between the two first folding edges, the protrusion is embedded in the clamping slot, further limiting the displacement of the second shell, and improving the reliability of the circuit board shell.

[0020] In some embodiments, the first shell and the second shell are both vacuum molded parts.

[0021] The first shell and the second shell are both vacuum molded parts, both have a certain toughness, and are connected more tightly when matched. The vacuum molded part can also reduce the weight of the circuit board shell, help the light weight of the battery device, and has higher production efficiency.

[0022] In a second aspect, the embodiments of the present application provide a power utilization device, which comprises the battery device according to any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope.

[0024] Figure 1 A structural schematic diagram of a vehicle is provided for some embodiments of the present application;

[0025] Figure 2 An exploded schematic diagram of a battery device is provided for some embodiments of the present application;

[0026] Figure 3 An exploded schematic diagram of a battery monomer is provided for some embodiments of the present application;

[0027] Figure 4 A structural schematic diagram of a circuit board shell during installation is provided for some embodiments of the present application;

[0028] Figure 5 An exploded schematic diagram of a circuit board shell is provided for some embodiments of the present application;

[0029] Figure 6 A first shell schematic diagram is provided for some embodiments of the present application, wherein the middle part structure is omitted;

[0030] Figure 7 A Figure 6 An enlarged schematic diagram of the B position;

[0031] Figure 8 A top view of a circuit board housing provided for some embodiments of the present application;

[0032] Figure 9 Provided for Figure 8 A cross-sectional view at position A-A in the middle.

[0033] Icon:

[0034] 1000 - vehicle;

[0035] 100 - battery device; 200 - controller; 300 - motor;

[0036] 10 - box body; 11 - first box body; 12 - second box body;

[0037] 20 - battery cell; 21 - battery cell housing; 22 - electrode assembly; 23 - electrode terminal; 211 - housing; 212 - end cover; 221 - main body part; 222 - tab;

[0038] 30 - circuit board;

[0039] 40 - circuit board housing; 41 - first housing; 42 - second housing; 411 - first housing main body; 411a - first face; 411b - second face; 411c - first end; 411d - second end; 411e - recess; 412 - first folding edge; 412a - third face; 412b - fourth face; 413 - first sliding groove; 413a - first groove face; 413b - second groove face; 414 - limiting groove; 415 - clamping groove; 416 - second folding edge; 421 - first side edge; 422 - second side edge; 423 - protrusion. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising," "including," and "having," and variations thereof, are intended to cover a non-exclusive inclusion; the terms "first," "second," and the like, are used merely to distinguish one element from another, and do not require a particular order or sequence.

[0042] Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments.

[0043] In the description of the application, it is necessary to explain that, unless otherwise explicitly defined and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0044] In this application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0045] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0046] In the embodiments of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0047] The battery cell 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. The embodiments of the application are not limited in this regard.

[0048] A battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are intercalated and deintercalated between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, and can function to prevent the positive electrode and the negative electrode from shorting to some extent, while allowing the active ions to pass through.

[0049] 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 disposed on at least one surface of the positive electrode current collector.

[0050] As an example, the positive electrode current collector has two surfaces opposite in the thickness direction thereof, and the positive electrode active material is disposed on either one or both of the two opposite surfaces of the positive electrode current collector.

[0051] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with silver plating on the surface, stainless steel with silver plating on the surface, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, etc. can be used. 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 (e.g., a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0052] As an example, the positive electrode active material can include at least one of lithium-containing phosphates, lithium transition metal oxides, and modified compounds thereof. However, the present application is 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 or in combination with two or more. As an example of the lithium-containing phosphates, at least one of lithium iron phosphate (e.g., LiFePO4 (which can also be referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (e.g., LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon can be included, but is not limited thereto. As an example of the lithium transition metal oxides, at least one of lithium cobalt oxide (e.g., LiCoO2), lithium nickel oxide (e.g., LiNiO2), lithium manganese oxide (e.g., LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (e.g., LiNi 1 / 3 Co 1 / 3 Mn 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 523LiNi 0.5 Co 0.25 Mn 0.25 O2(also can be referred to as NCM 211 LiNi 0.6 Co 0.2 Mn 0.2 O2(also can be referred to as NCM 622 LiNi 0.8 Co 0.1 Mn 0.1 O2(also can be referred to as NCM 811 LiNi 0.85 Co 0.15 Al 0.05 O2) and modified compounds thereof.

[0053] In some embodiments, the positive electrode can employ a foam metal. The foam metal can be a foam nickel, a foam copper, a foam aluminum, a foam alloy, or the like. When the foam metal is employed as the positive electrode, the foam metal surface can not be provided with the positive electrode active material, or of course can be provided with the positive electrode active material. As an example, the foam metal can also be filled or / and deposited with a lithium source material, a potassium metal, or a sodium metal, the lithium source material being a lithium metal and / or a lithium-rich material.

[0054] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0055] As an example, the negative electrode current collector can employ a metal foil, a foam metal, or a composite current collector. For example, as the metal foil, silver surface treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, nickel, or titanium, or the like can be employed. The foam metal can be a foam nickel, a foam copper, a foam aluminum, a foam alloy, or the like. 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, or the like) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0056] As an example, the negative electrode sheet can include the negative electrode current collector and the negative electrode active material provided on at least one surface of the negative electrode current collector.

[0057] As an example, the negative electrode current collector has two surfaces opposite in the thickness direction thereof, and the negative electrode active material is provided on either one or both of the two opposite surfaces of the negative electrode current collector.

[0058] As an example, the negative active material can employ a negative active material for a battery cell known in the art. As an example, the negative active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, and lithium titanate, etc. The silicon-based material can be selected from at least one of elemental silicon, silicon oxide compound, silicon-carbon composite, silicon-nitrogen composite, and silicon alloy. The tin-based material can be selected from at least one of elemental tin, tin oxide compound, and tin alloy. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery negative active material can also be used. These negative active materials can be used alone or in combination of two or more.

[0059] In some embodiments, the material of the positive current collector can be aluminum, and the material of the negative current collector can be copper.

[0060] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0061] In some embodiments, the separator is a separator film. The separator film can be of various types, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0062] As an example, the material of the separator film can include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator film can be a single layer film or a multi-layer composite film. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different. The separator can be a separate component located between the positive and negative electrodes, or can be attached to the surface of the positive and negative electrodes.

[0063] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode and the negative electrode, and functions to transport ions and separate the positive and negative electrodes.

[0064] In some embodiments, the battery cell further includes an electrolyte that functions to conduct ions between the positive and negative electrodes. The electrolyte can be in a liquid state, a gel state, or a solid state. Among them, the liquid electrolyte includes an electrolyte salt and a solvent.

[0065] In some embodiments, the electrolyte salt can include 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, and lithium tetrafluorophosphoric oxalate.

[0066] In some embodiments, the solvent can include 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 ether solvents. The ether solvents 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 crown ether.

[0067] In some embodiments, the gel electrolyte includes a polymer as a skeleton network of the electrolyte, and an ionic liquid-lithium salt.

[0068] In some embodiments, the solid electrolyte includes a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte.

[0069] As an example, the polymer solid electrolyte can be a polyether (polyethylene oxide), a polysiloxane, a polycarbonate, a polyacrylonitrile, a polyvinylidene fluoride, a polymethyl methacrylate, a single-ion polymer, a polyionic liquid-lithium salt, cellulose, or the like.

[0070] As an example, the inorganic solid electrolyte can include one or more of an oxide solid electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorus sulfide, argyrodite), amorphous sulfide), and a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

[0071] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0072] In some embodiments, the electrode assembly is a jelly-roll structure. The positive electrode sheet and the negative electrode sheet are wound into the jelly-roll structure.

[0073] In some embodiments, the electrode assembly is a stacked structure.

[0074] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets can be alternately stacked.

[0075] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet can be folded to form a plurality of folded segments that are stacked, and one positive electrode sheet can be interposed between adjacent folded segments.

[0076] As an example, the positive electrode sheet and the negative electrode sheet can be folded to form a plurality of folded segments that are stacked.

[0077] As an example, the separators can be provided in plurality, each provided between any adjacent positive electrode sheet or negative electrode sheet.

[0078] As an example, the separators can be provided in plurality, each provided between any adjacent positive electrode sheet or negative electrode sheet.

[0079] In some embodiments, the electrode assembly can have a shape of a cylinder, a flat, or a polygonal prism, etc.

[0080] In some embodiments, the electrode assembly can be provided with tabs, which can conduct current out of the electrode assembly. The tabs can include positive tabs and negative tabs.

[0081] In some embodiments, the battery cell can include a casing. The casing can be used to enclose components such as the electrode assembly and the electrolyte. The casing can be a steel casing, an aluminum casing, a plastic casing (e.g., polypropylene), a composite metal casing (e.g., a copper-aluminum composite casing), or an aluminum-plastic film, etc.

[0082] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes, which can include but not limited to a square battery cell, a blade battery cell, a polygonal battery cell (e.g., a hexagonal battery cell), etc.

[0083] A battery apparatus as referred to in embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0084] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module.

[0085] In some embodiments, the battery apparatus can be a battery pack, which includes a box and one or more battery cell assemblies housed in the box.

[0086] As an example, the battery cell assembly can be a battery module, which can be housed in the box by fixing the battery module in the box.

[0087] As an example, the battery cell assembly can also be housed in the box by directly fixing a plurality of battery cells in the box.

[0088] As an example, the box can include a first box body and a second box body. The first box body and the second box body are fastened so that an inside of the box forms a closed space to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box body can be a top cover or a bottom plate.

[0089] As an example, the box can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that an inside of the box forms a closed space to accommodate the battery monomer assembly.

[0090] As an example, the box can be part of a chassis structure of a vehicle. For example, the top cover of the box can be at least part of the floor of the vehicle, or the frame of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0091] In some embodiments, the battery device refers to an energy storage device, and the energy storage device includes a box, at least one side of the box is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet and the like.

[0092] The battery device has the advantages of high energy density, small environmental pollution, large power density, long service life, wide adaptation range, small self-discharge coefficient and the like, and is an important part of the development of new energy at present. The development of battery technology needs to consider many factors, such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, in addition, the reliability of the battery device also needs to be considered.

[0093] With the rapid development of new energy technology, higher requirements are put forward for the reliability of the battery device, in addition, higher requirements are also put forward for the assembly efficiency of the battery device. There are many circuit boards in the battery device, and these circuit boards are usually installed in a circuit board shell. The circuit board shell can protect the circuit board inside it, such as resisting impact, preventing corrosion, short circuit and the like. Taking the battery management system (BMS) as an example, the circuit board shell in the battery management system is usually of upper and lower shell cover type and is fixed by fasteners, resulting in low installation efficiency. In the related art, the circuit board shell is of one-piece folding and fastening type, although the installation efficiency can be improved, but in the case of multiple rework, the circuit board shell is repeatedly folded and opened, the middle connection is easy to break, resulting in poor reliability, especially in the current demand for extreme lightness, the circuit board shell will be thinner, and the risk of breaking the middle connection will be further increased.

[0094] To this end, the embodiment of the present application provides a battery device, comprising: a battery cell; a circuit board electrically connected with the battery cell; a circuit board shell comprising a first shell and a second shell, the second shell being connected with the first shell and jointly forming an accommodating space for accommodating the circuit board; wherein the first shell comprises a first shell body and two first folding edges connected to opposite sides of the first shell body along a first direction, each first folding edge and the first shell body forming a first sliding groove therebetween, the first sliding groove extending along a second direction intersecting the first direction; the second shell comprises two first side edges along the first direction, the two first side edges being embedded in the two first sliding grooves respectively, and the second shell being configured to be capable of moving along the first sliding grooves to between the two first folding edges.

[0095] By the circuit board shell being two split first shells and a second shell, the two first folding edges of the first shell respectively forming the first sliding grooves with the first shell body, and the two first side edges of the second shell respectively moving along the two first sliding grooves to between the two first folding edges and being embedded in the two first sliding grooves, the second shell is connected with the first shell to jointly form the accommodating space for accommodating the circuit board, thereby, quick installation can be achieved, installation efficiency is improved, the problem of fracture of the split folding and buckling shell in repeated opening and closing is eliminated, and reliability is improved.

[0096] The battery device disclosed in the embodiment of the present application can be used in, but is not limited to, an electric device such as a vehicle, a ship or an aircraft. A power supply system of the electric device can be composed of the battery device disclosed in the present application, so as to improve the use reliability of the battery device.

[0097] The embodiment of the present application provides an electric device using the battery device as a power supply. 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 and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric plane toy, and the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft.

[0098] The following embodiments are described taking a vehicle as an example for convenience of description.

[0099] Reference Figure 1The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom of the vehicle 1000, or at the head of the vehicle 1000, or at the tail of the vehicle 1000. The battery device 100 can be used to supply power to the vehicle 1000, for example, the battery device 100 can be used as an operating power source or a use power source of the vehicle 1000, etc. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation, and driving.

[0100] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source or a use power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0101] Please refer to Figure 2 and Figure 3 The box body 10 is used to provide an assembly space for the battery monomer 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 are overlapped with each other, and the first box body 11 and the second box body 12 together define an assembly space for accommodating the battery monomer 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-shaped structure, which is overlapped with the open side of the second box body 12 to make the first box body 11 and the second box body 12 together define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 is overlapped with the open side of the second box body 12.

[0102] Of course, the first box body 11 and the second box body 12 can form a box body 10 with various shapes, such as a cylinder, a cuboid, or a square, etc. Exemplarily, in Figure 2 , the shape of the box body 10 is a cuboid.

[0103] In the battery device 100, a plurality of battery cells 20 are arranged in the box 10, and the plurality of battery cells 20 can be connected in series, in parallel, or in a mixed connection, where the mixed connection means that the plurality of battery cells 20 are connected in series and in parallel. The plurality of battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and the plurality of battery cells 20 are accommodated in the box 10. Of course, the battery device 100 can also be in a form that the plurality of battery cells 20 are connected in series, in parallel, or in a mixed connection to form a battery module, and the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and the whole is accommodated in the box 10.

[0104] In some embodiments, the battery device 100 can further include other structures, for example, the battery device 100 can further include a busbar component for connecting the plurality of battery cells 20 to achieve electrical connection between the plurality of battery cells 20.

[0105] Each battery cell 20 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in a cuboid, a cylinder, a prism, or other shapes. For example, in the embodiment shown in Figure 3 In the embodiment shown in

[0106] For example, referring to Figure 3 , the battery cell 20 includes a battery cell housing 21 and an electrode assembly 22 arranged in the battery cell housing 21.

[0107] The battery cell housing 21 can also be used to accommodate an electrolyte, for example, an electrolyte solution. The battery cell housing 21 can be in various structural forms, for example, a cylinder or a cuboid. Similarly, the material of the battery cell housing 21 can also be various, for example, copper, iron, aluminum, steel, or aluminum alloy.

[0108] Optionally, the battery cell housing 21 can include a shell 211 and an end cover 212, the shell 211 has an accommodation cavity formed therein for accommodating the electrode assembly 22, and the accommodation cavity has an opening, that is, the shell 211 is a hollow structure with an opening at one end, and the end cover 212 is sealed to the opening of the shell 211 to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.

[0109] The shell 211 can be in various shapes, such as a cylinder, a cuboid, a prism, or the like. The shape of the shell 211 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is in a cylindrical structure, a cylindrical shell 211 can be selected; if the electrode assembly 22 is in a cuboid structure, a cuboid shell 211 can be selected. Of course, the structure of the end cap 212 can also be various, such as a plate structure or a hollow structure with one end open, and the like. Exemplarily, in the embodiment shown in FIG. 1, the shell 211 is in a cuboid structure. Figure 3

[0110] Of course, it is understood that the battery cell shell 21 is not limited to the above structure, and the battery cell shell 21 can also be in other structures, for example, the battery cell shell 21 can include a shell 211 and two end caps 212, the shell 211 is a hollow structure with openings formed on opposite sides, one end cap 212 corresponds to cover one opening of the shell 211 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte, that is, the shell 211 is formed with openings on opposite sides, and the two end caps 212 cover the two sides of the shell 211 respectively to close the corresponding openings.

[0111] It should be noted that the electrode assembly 22 is a component in which an electrochemical reaction occurs in the battery cell 20, and the structure of the electrode assembly 22 can be various, for example, the electrode assembly 22 can be a wound structure formed by winding a positive electrode sheet, a separator, and a negative electrode sheet, or a laminated structure formed by laminating a positive electrode sheet, a separator, and a negative electrode sheet.

[0112] Exemplarily, the separator is a separator film, and 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.

[0113] The electrode assembly 22 includes a main body part 221 and a tab 222, the main body part 221 is the main component of the electrode assembly 22 in which an electrochemical reaction occurs in the battery cell 20, and exemplarily, in the embodiment shown in FIG. 1, the main body part 221 is a wound structure formed by winding a positive electrode sheet, a separator, and a negative electrode sheet. Figure 3 The tab 222 is connected to one end of the main body part 221 close to the end cap 212, so as to connect the tab 222 with the electrode terminal 23. The tab 222 can be directly connected with the electrode terminal 23, or can be connected through an adapter component.

[0114] Optionally, the electrode assembly 22 accommodated in the battery cell shell 21 can be one or multiple. Exemplarily, in the embodiment shown in FIG. 1, the electrode assembly 22 accommodated in the battery cell shell 21 is one. Figure 3 ​In the battery cell 20, the battery cell housing 21 is provided with multiple electrode assemblies 22, which are stacked. When multiple electrode assemblies 22 are provided inside the battery cell housing 21 of the battery cell 20, the number of electrode assemblies 22 can be two, three, four, five, or six, etc.

[0115] The electrode terminal 23 serves to electrically connect to the electrode assembly 22, acting as the output or input terminal of the battery cell 20, thereby enabling the output or input of electrical energy from the battery cell 20.

[0116] For example, the electrode terminal 23 can be made of various materials, such as copper, iron, aluminum, steel or aluminum alloy.

[0117] Among them, Figure 3 In the battery cell 20, there are two electrode terminals 23. Correspondingly, each electrode assembly 22 has two tabs 222 with opposite polarities. That is, the two tabs 222 are the positive and negative terminals of the input or output electrode assembly 22, respectively. The two electrode terminals 23 are electrically connected to the two tabs 222 of the electrode assembly 22, respectively, so as to realize the input or output of the positive and negative terminals of the battery cell 20.

[0118] The structure in which the electrode terminal 23 is mounted on the battery cell housing 21 can be varied. For example, in... Figure 2 to Figure 9 In this embodiment, two electrode terminals 23 are mounted on the end cap 212. Of course, the structure of the battery cell 20 is not limited to this. In other embodiments, both electrode terminals 23 may be mounted on the housing 211 of the battery cell housing 21. Similarly, one electrode terminal 23 may be mounted on the housing 211 of the battery cell housing 21, and the other electrode terminal 23 may be mounted on the end cap 212 of the battery cell housing 21.

[0119] Below, refer to Figure 4 The embodiments of this application will be described in detail below.

[0120] The embodiment of the present application provides a battery device 100, comprising: a battery monomer 20; a circuit board 30 electrically connected with the battery monomer 20; a circuit board shell 40 comprising a first shell 41 and a second shell 42, the second shell 42 is connected with the first shell 41 and forms a containing space for containing the circuit board together; wherein the first shell 41 comprises a first shell main body 411 and two first folding edges 412 connected to opposite sides of the first shell main body 411 along a first direction X, each first folding edge 412 and the first shell main body 411 form a first sliding groove 413, the first sliding groove 413 extends along a second direction Y, and the second direction Y intersects the first direction X; the second shell 42 comprises two first side edges 421 along the first direction X, and the two first side edges 421 are embedded in the two first sliding grooves 413 respectively, and the second shell 42 is configured to be capable of moving along the first sliding groove 413 to between the two first folding edges 412.

[0121] The circuit board 30 can be a master control board in a power management system (BMS), and the microcontroller, the battery voltage detection circuit, the current detection circuit, the temperature detection circuit, the communication module and the like are integrated on the circuit board 30. Of course, the circuit board 30 can also be other circuit boards in the battery device 100, such as a battery monitoring unit (CSC) and the like.

[0122] The circuit board shell 40 is used for containing the circuit board 30, so as to provide protection for the circuit board 30. The circuit board shell 40 comprises the first shell 41 and the second shell 42, and the first shell 41 and the second shell 42 are two separate parts.

[0123] The first shell 41 comprises the first shell main body 411 and the two first folding edges 412 connected to opposite sides of the first shell main body 411 along the first direction X, and the first folding edge 412 can be integrally formed with the first shell main body 411. For example, the first folding edge 412 can be bent from the edge of the first shell main body 411 along the first direction X. The first folding edge 412 can also be connected with the first shell main body 411 in other manners, such as bonding, welding and the like.

[0124] Each first folding edge 412 and the first shell main body 411 form the first sliding groove 413, the first sliding groove 413 extends along the second direction Y, and the first folding edge 412 and the first shell main body 411 have a gap, and the gap forms the first sliding groove 413. The first sliding groove 413 extends along the second direction Y, and the second direction Y intersects the first direction X, for example, the second direction Y is perpendicular to the first direction X.

[0125] The two first side edges 421 of the second shell 42 can be embedded in the first sliding groove 413 and move to between the two first folding edges 412 along the second direction Y under the guidance of the first sliding groove 413 Figure 9The middle dashed line C arrow indicates the direction of embedding, so the first shell 41 and the second shell 42 are connected to each other to form a containing space for containing the circuit board 30.

[0126] As an example, the first shell body 411 is formed with a groove 411e, and the circuit board 30 is at least partially contained in the groove 411e. The second shell 42 is also formed with a groove, and when the second shell 42 moves between the two first folding edges 412, the groove 411e of the first shell 41 and the groove of the second shell 42 are opposite to each other, and together form a containing space for containing the circuit board 30.

[0127] By the circuit board shell 40 being two separate first shell 41 and second shell 42, the two first folding edges 412 of the first shell 41 are respectively connected with the first shell body 411 to form a first sliding groove 413, and the two first side edges 421 of the second shell 42 are respectively moved along the two first sliding grooves 413 to the two first folding edges 412 and embedded in the two first sliding grooves 413, so that the second shell 42 is connected with the first shell 41 to form a containing space for containing the circuit board 30, thereby realizing quick installation, improving installation efficiency, eliminating the problem of breaking of the previous integrated folding and buckling shell in repeated opening and closing, and improving reliability.

[0128] In some embodiments, one end of the first folding edge 412 is connected with the first shell body 411, and the other end is a free end; along the first direction X, the two first folding edges 412 are bent towards each other.

[0129] The first folding edge 412 is bent relative to the first shell body 411, and the two first folding edges 412 are bent towards each other along the first direction X.

[0130] Therefore, the first folding edge 412 limits the first side edge 421 in the third direction Z, thereby limiting the displacement of the second shell 42 in the third direction Z.

[0131] In some embodiments, with reference to Figure 9 , the first sliding groove 413 includes a first groove surface 413a and a second groove surface 413b opposite in the third direction Z, and the third direction Z, the second direction Y and the first direction X are perpendicular to each other; the first side edge 421 abuts against the first groove surface 413a and the second groove surface 413b.

[0132] The first side edge 421 abuts against the first groove surface 413a and the second groove surface 413b, which can be understood as the first side edge 421 being clamped between the first groove surface 413a and the second groove surface 413b, so that the first folding edge 412 gives the first side edge 421 a certain pre-tightening force. As an example, the first shell 41 can be a plastic suction piece which has a certain toughness.

[0133] Thus, the second shell 42 and the first shell 41 can be tightly connected, the risk of mutual collision due to shaking is reduced, and reliability is improved.

[0134] In some embodiments, with reference to Figure 5 , one end of the first groove surface 413a is connected with the second groove surface 413b, and along the extension direction of the first folding edge 412, the distance H1 between the first groove surface 413a and the second groove surface 413b gradually increases.

[0135] The distance H1 between the first groove surface 413a and the second groove surface 413b is a straight line distance along the third direction Z. The distance H1 between the first groove surface 413a and the second groove surface 413b gradually increases, so that the slot of the first sliding groove 413 gradually widens. The included angle between the first groove surface 413a and the second groove surface 413b can be an acute angle.

[0136] The slot of the first sliding groove 413 has a gradually increasing trend, which facilitates the first side edge 421 to enter the first sliding groove 413 while enabling the first side edge 421 to tightly cooperate with the first sliding groove 413, thereby improving reliability.

[0137] In some embodiments, the first shell body 411 includes a first surface 411a and a second surface 411b opposite to each other along the third direction Z; the first folding edge 412 includes a third surface 412a and a fourth surface 412b opposite to each other along the thickness direction thereof, the third surface 412a is closer to the first surface 411a than the fourth surface 412b, and a part of the third surface 412a is the first groove surface 413a, and the first surface 411a is the second groove surface 413b.

[0138] The first groove surface 413a is formed by the first folding edge 412, and the second groove surface 413b is formed by the first shell body 411, so that the first folding edge 412 and the first shell body 411 jointly enclose the first sliding groove 413.

[0139] Thus, the second shell 42 and the first shell 41 can be tightly connected, thereby improving reliability.

[0140] In some embodiments, with reference to Figure 6 , Figure 7 and Figure 7 , the first shell body 411 includes a first end 411c and a second end 411d along the second direction Y, and the first shell 41 further includes a second folding edge 416 connected to the first end 411c; the second shell 42 further includes a second side edge 422 on one side along the second direction Y, the second side edge 422 connects the two first side edges 421, and the second side edge 422 abuts against the second folding edge 416.

[0141] When the second shell 42 moves to between the two first folding edges 412, i.e., is installed in place, the second side edge 422 abuts against the second folding edge 416.

[0142] The second fold edge 416 is arranged on the first shell 41, and the second side edge 422 abuts against the second fold edge 416, so as to limit the displacement of the second shell 42 along one side of the second direction Y, and improve the connection reliability.

[0143] In some embodiments, one end of the second fold edge 416 is connected with the first shell body 411, and the other end is a free end; along the second direction Y, the second fold edge 416 is bent towards the second end 411d, and a limiting groove 414 is formed between the second fold edge 416 and the first shell body 411 (as shown in the figure), the limiting groove 414 extends along the first direction X, and the second side edge 422 is embedded in the limiting groove 414. Figure 6

[0144] The second fold edge 416 is bent towards the second end 411d, and the limiting groove 414 is formed between the second fold edge 416 and the first shell body 411, and the second side edge 422 is embedded in the limiting groove 414, which not only can limit the displacement of the second shell 42 along the second direction Y, but also can limit the displacement of the second shell 42 along the third direction Z, so as to improve the reliability of the circuit board shell 40.

[0145] In some embodiments, the first shell body 411 is further provided with a clamping groove 415, and the second shell 42 is provided with a protrusion 423 corresponding in position to the clamping groove 415; or, the first shell body is further provided with a protrusion 423, and the second shell 42 is provided with a clamping groove 415 corresponding in position to the protrusion 423; wherein when the second shell 42 moves between the two first fold edges 412, the protrusion 423 is embedded in the clamping groove 415.

[0146] When the second shell 42 moves between the two first fold edges 412, that is, is installed in place, the protrusion 423 is embedded in the clamping groove 415 to limit the displacement of the second shell 42.

[0147] As an example, with reference to Figure 2 to Figure 9 The clamping groove 415 is arranged on one side of the first shell body 411 along the second direction Y close to the second end 411d.

[0148] When the second shell 42 moves between the two first fold edges 412, the protrusion 423 is embedded in the clamping groove 415, further limiting the displacement of the second shell 42, and improving the reliability of the circuit board shell 40.

[0149] In some embodiments, the first shell 41 and the second shell 42 are both vacuum plastic parts.

[0150] The first shell 41 and the second shell 42 are both vacuum plastic parts, both have a certain toughness, and are connected more tightly when matched, and the vacuum plastic part can also reduce the weight of the circuit board shell 40, which helps the lightweight of the battery device 100, and has higher production efficiency. ​

[0151] Hereinafter, with reference to the drawings, the present application will be described in detail. ​ One specific example of the present application will be described.

[0152] The embodiment of the present application provides a battery device 100, which comprises a battery monomer 20 and a battery management system (BMS), the battery management system (BMS) comprises a circuit board 30 and a circuit board shell 40 containing the circuit board 30, the circuit board shell 40 comprises a first shell 41 and a second shell 42, the first shell 41 is bent to form a first folding edge 412 on both sides of the first direction X, the first shell 41 is bent to form a second folding edge 416 on one side of the second direction Y, the first folding edge 412 and the first shell main body 411 form a first sliding groove 413 extending along the second direction Y, the second folding edge 416 and the first shell main body 411 form a limiting groove 414 extending along the first direction X, and the first shell 41 further comprises a clamping groove 415 on the side away from the second folding edge 416 along the second direction Y. The second shell 42 comprises a protrusion 423 corresponding to the position of the clamping groove 415.

[0153] The two first side edges 421 of the second shell 42 along the first direction X are respectively embedded in the two first sliding grooves 413, and the second shell 42 moves along the second direction Y to the between the two first folding edges 412 under the guidance of the first sliding groove 413, so that the first shell 41 and the second shell 42 jointly form a containing space for containing the circuit board 30. When the second shell 42 is installed in place, the second side edge 422 of the second shell 42 along the second direction Y is embedded in the limiting groove 414 and abuts against the second folding edge 416, and the protrusion 423 on the second shell 42 is clamped into the clamping groove 415 on the first shell 41.

[0154] In the second aspect, the embodiment of the present application provides a power consumption device comprising the battery device 100 of any of the above embodiments.

[0155] The above only provides the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, include: Battery cell; The circuit board is electrically connected to the individual battery cells; The circuit board housing includes a first housing and a second housing, wherein the second housing is connected to the first housing and together form a receiving space for accommodating the circuit board; The first outer shell includes a first outer shell body and two first flanges connected to opposite sides of the first outer shell body along a first direction. Each first flange forms a first groove with the first outer shell body. The first groove extends along a second direction, which intersects with the first direction. The second housing includes two first sides along the first direction, the two first sides being respectively embedded in the two first grooves, and the second housing is configured to move along the first grooves between the two first folded edges; One end of the first folded edge is connected to the first outer shell body, and the other end is a free end; Along the first direction, the two first folded edges bend close to each other; The first groove includes a first groove surface and a second groove surface that are opposite each other along a third direction, wherein the third direction, the second direction and the first direction are perpendicular to each other; The first side abuts against the first groove surface and the second groove surface; One end of the first groove surface is connected to the second groove surface, and the distance between the first groove surface and the second groove surface gradually increases along the extension direction of the first fold.

2. The battery device according to claim 1, characterized in that, The first outer shell body includes a first surface and a second surface opposite to each other along the third direction; The first folded edge includes a third surface and a fourth surface that are opposite to each other along its thickness direction. The third surface is closer to the first surface than the fourth surface. The third surface is the first groove surface, and the first surface is the second groove surface.

3. The battery device according to claim 1, characterized in that, The first outer shell body includes a first end and a second end along the second direction. The first outer casing also includes a second folded edge connected to the first end; The second housing also includes a second side edge along one side of the second direction, the second side edge connecting the two first side edges, and the second side edge abutting against the second folded edge.

4. The battery device according to claim 3, characterized in that, One end of the second folded edge is connected to the first outer shell body, and the other end is a free end; Along the second direction, the second folded edge is bent toward the second end, and a limiting groove is formed between the second folded edge and the first outer shell body, the limiting groove extending along the first direction; The second side is embedded in the limiting groove.

5. The battery device according to claim 1, characterized in that, The first outer shell body is also provided with a slot, and the second outer shell is provided with a protrusion corresponding to the position of the slot; or the first outer shell body is also provided with a protrusion, and the second outer shell is provided with a slot corresponding to the position of the protrusion. When the second outer shell moves between the two first folded edges, the protrusion is embedded in the slot.

6. The battery device according to claim 1, characterized in that, The first outer shell body is provided with a groove; The circuit board is at least partially located in the groove.

7. The battery device according to claim 1, characterized in that, Both the first outer shell and the second outer shell are thermoformed parts.

8. An electrical device, characterized in that, include: The battery device according to any one of claims 1-7.

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