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 is connected with the first shell to form an accommodating space for accommodating the circuit board; the first shell comprises a first shell body and two first side walls connected to the two opposite sides of the first shell body in the first direction, the first side walls extend in the second direction, at least one first side wall is provided with a clamping part, and the second direction intersects with the first direction; the second shell comprises a first side portion on at least one side in the first direction, and the second shell is configured to be capable of being buckled to the first shell in the second direction so that the first side portion can be connected with the clamping portion in a clamped mode. The reliability of the battery device 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 used in electronic devices, electric vehicles, electric two-wheel vehicles, electric tools and other fields. With the more and more widely application of battery devices, higher requirements are put forward for the reliability of battery devices. CONTENT OF THE INVENTION

[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 to form an accommodation space for accommodating the circuit board; the first shell comprising a first shell main body and two first side walls connected to opposite sides of the first shell main body along a first direction, the first side wall extending along a second direction, at least one of the first side walls being provided with a clamping portion, the second direction intersecting the first direction; the second shell comprising a first side portion on at least one side along the first direction, the second shell being configured to be clamped to the first shell along the second direction so that the first side portion is clamped with the clamping portion.

[0005] The first shell and the second shell are connected by clamping each other in a split manner, and together form an accommodation space for accommodating the circuit board, so that the connection is more reliable, the circuit board can be better protected, and the reliability is improved. Even in the case of multiple opening and closing of the circuit board shell, the connection reliability can be maintained, and the problem of easy breakage of the middle connection caused by repeated folding and opening of the previous integrated folding shell is eliminated.

[0006] In some embodiments, the clamping portion is a first protrusion, and the first protrusion protrudes from the inner side surface of the first side wall.

[0007] By making the clamping portion a first protrusion, the clamping is easier and more reliable, and it is also convenient to form on the inner side surface of the first side wall, improving production efficiency.

[0008] In some embodiments, the first side portion is clamped between the first protrusion and the first shell main body.

[0009] The first side portion is clamped between the first protrusion and the first shell body through the first side of the second shell, so as to clamp the second shell with the first shell to limit displacement of the second shell relative to the first shell in the first direction, and the two edge portions of the second shell in the first direction are matched with the first protrusion, without the need to set a complex clamping structure on the second shell, so as to simplify the structure and reduce the cost.

[0010] In some embodiments, the first shell body comprises a first face and a second face opposite to each other in the second direction, and the second face is closer to the first protrusion than the first face; the first side portion comprises a third face and a fourth face opposite to each other in the second direction, and the third face is against the second face, and the fourth face is against the first protrusion.

[0011] When the second shell is clamped with the first shell, the third face of the first side portion is against the second face of the first shell body, and the fourth face of the first side portion is against the first protrusion, so that the first side portion is firmly limited between the first protrusion and the first shell body, the risk of shaking of the second shell in the second direction to disengage from the first shell is reduced, the connection reliability is improved, and the circuit board is reliably protected.

[0012] In some embodiments, the second shell comprises a second shell body, and the first side portion is connected to the second shell body and extends in the second direction; wherein the first side portion is formed with a first clamping groove matched with the first protrusion.

[0013] The first side portion extends in the second direction and is formed with the first clamping groove matched with the first protrusion, so that the clamping strength of the first protrusion and the first clamping groove is improved, the risk of shaking to disengage the first shell and the second shell is reduced, and the connection reliability is improved.

[0014] In some embodiments, the first shell further comprises a second side wall connected to one side of the first shell body in a third direction, the second side wall extends in the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0015] The first shell has the second side wall on one side in the third direction, so that the displacement of the second shell in the third direction is limited, the risk of disengagement of the first shell and the second shell is reduced, and the reliability is improved.

[0016] In some embodiments, the second side wall is provided with a second protrusion protruding from an inner side face of the second side wall; and the second shell further comprises a second side portion on one side in the third direction, and the second side portion is clamped between the second protrusion and the first shell body.

[0017] The second side wall of the first shell is provided with a second protrusion along a third direction, and a second side portion of the second shell is clamped between the second protrusion and the first shell body when the second shell is buckled with the second shell along a second direction, so as to limit displacement of the second shell relative to the first shell along the second direction, and the second side wall extending along the second direction can also limit displacement of the second shell along the third direction, so that the first shell and the second shell are more firmly connected, the risk of disconnection of the two is reduced, and reliability is improved.

[0018] In some embodiments, the second side wall is provided with a third protrusion protruding from an inner side surface of the second side wall, and the second shell further includes a second side portion on one side along the third direction, the second side portion extending along the second direction; wherein the second side portion is formed with a second clamping groove clamped with the third protrusion.

[0019] By extending the second side portion along the second direction, the second side portion is formed with a second clamping groove clamped with the third protrusion, further improving the connection strength of the first shell and the second shell, reducing the risk of disconnection of the first shell and the second shell caused by shaking, and improving the connection reliability.

[0020] In some embodiments, the first shell further includes a third side wall connected to the first shell body, the third side wall is arranged opposite to the second side wall along the third direction, and the third side wall is provided with a avoiding port for avoiding the connector on the circuit board.

[0021] The avoiding port facilitates connection of the connector on the circuit board with the battery monomer, and improves installation efficiency.

[0022] In some embodiments, the first shell body is formed with a first recess, and the circuit board is at least partially located in the first recess.

[0023] By arranging the circuit board in the first recess, the shaking degree of the circuit board can be reduced, and the circuit board is better protected.

[0024] In some embodiments, the first shell and the second shell are both vacuum molded parts.

[0025] The vacuum molded part can make the first shell and the second shell thinner, so as to be more lightweight, and the molding efficiency is higher.

[0026] In a second aspect, the embodiments of the present application provide a power consumption device including the battery device of any of the above embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

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

[0029] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application;

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

[0031] Figure 4 An exploded view of a circuit board housing provided in some embodiments of this application;

[0032] Figure 5 This is a partial structural diagram showing the first and second outer shells being fastened together, as provided in some embodiments of this application;

[0033] Figure 6 Top view of a circuit board housing provided in some embodiments of this application;

[0034] Figure 7 for Figure 6 Cross-sectional view of position AA in the middle;

[0035] Figure 8 An exploded view of a circuit board housing provided for other embodiments of this application;

[0036] Figure 9 A partial structural diagram showing the first and second housings fastened together, provided for other embodiments of this application;

[0037] Figure 10 Top view of a circuit board housing provided for other embodiments of this application;

[0038] Figure 11 for Figure 10 Cross-sectional view of position AA in the middle.

[0039] icon:

[0040] 1000 - Vehicle; 100 - Battery unit; 200 - Controller; 300 - Motor;

[0041] 10 - Box body; 11 - First box body; 12 - Second box body;

[0042] 20 - battery cell; 21 - battery cell housing; 22 - electrode assembly; 23 - electrode terminal; 211 - housing; 212 - end cap; 221 - body portion; 222 - tab;

[0043] 30 - circuit board;

[0044] 40 - circuit board housing; 41 - first housing; 42 - second housing; 411 - first housing body; 411a - first face; 411b - second face; 412 - first side wall; 412a - inner side face; 413 - snap portion; 414 - first protrusion; 415 - second side wall; 416 - second protrusion; 417 - third protrusion; 418 - third side wall; 418a - clearance; 421 - first side portion; 421a - third face; 421b - fourth face; 422 - second side portion; 423 - second housing body; 424 - first snap groove; 425 - second snap groove. DETAILED DESCRIPTION

[0045] In order to make the objects, 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 with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all 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 scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the present application are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the present application are used to distinguish different objects, and are not intended to describe a particular order or a primary and secondary relationship.

[0047] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily mutually exclusive or alternative embodiments to each other.

[0048] In the description of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "mounting", "connection", "connecting", "attachment" should be broadly interpreted, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0050] In the embodiments of the present 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, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0051] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0052] 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 present application are not limited thereto.

[0053] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, 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 to a certain extent, and at the same time allow the active ions to pass through.

[0054] 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.

[0055] As an example, the positive electrode current collector has two opposite surfaces in its own thickness direction, and the positive electrode active material is arranged on any one or both of the two opposite surfaces of the positive electrode current collector.

[0056] As an example, the positive electrode current collector can employ a metal foil or a composite current collector. For example, as a metal foil, aluminum subjected to silver plating on the surface, stainless steel subjected to silver plating on the surface, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, or the like can be employed. The composite current collector can include a high molecular material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, an aluminum alloy, nickel, a nickel alloy, titanium, a titanium alloy, silver, and a silver alloy, or the like) on a high molecular material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0057] 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, 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 only one kind, or two or more kinds 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 LiFePO4 (which can also be referred to simply as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as 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. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (which can also be referred to simply as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (which can also be referred to simply as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (which can also be referred to simply as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (which can also be referred to simply as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be referred to simply as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2), and a modified compound thereof.

[0058] In some embodiments, the positive electrode can employ a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. When the foamed metal is employed as the positive electrode, the foamed metal surface can be free of positive electrode active material, or can be provided with positive electrode active material. As an example, the foamed metal can be filled or / and deposited with lithium source material, potassium metal or sodium metal. The lithium source material can be lithium metal and / or lithium-rich material.

[0059] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0060] As an example, the negative electrode current collector can employ a metal foil, foamed metal or composite current collector. For example, as the metal foil, silver surface treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, nickel or titanium, etc. can be employed. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. 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.).

[0061] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

[0062] 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.

[0063] As an example, the negative electrode active material can employ a negative electrode active material known in the art for use in a battery cell. As an example, the negative electrode active material can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based material, tin-based material, 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 electrode active material can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0064] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0065] In some embodiments, the electrode assembly further includes a separator provided between the positive electrode and the negative electrode.

[0066] In some embodiments, the separator is a separator film. The separator film can be any porous structure separator film known in the art that has good chemical stability and mechanical stability.

[0067] As an example, the separator film can be made of 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 layers can be the same or different. The separator can be a separate component between the positive and negative electrodes or can be attached to the surface of the positive and negative electrodes.

[0068] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive and negative electrodes and functions to transport ions and separate the positive and negative electrodes.

[0069] 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. The liquid electrolyte includes an electrolyte salt and a solvent.

[0070] 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 difluoro oxalate borate, lithium bis-oxalate borate, lithium difluoro bis-oxalate phosphate, and lithium tetrafluoro oxalate phosphate.

[0071] 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, butyrosulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be 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 crown ether.

[0072] The gel-state electrolyte includes a polymer as a backbone network of the electrolyte, in combination with an ionic liquid-lithium salt.

[0073] The solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0074] As an example, the polymer solid-state 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, a cellulose, or the like.

[0075] As an example, the inorganic solid-state electrolyte can include one or more of an oxide solid-state electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON 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.

[0076] As an example, the composite solid-state electrolyte is formed by adding an inorganic solid-state electrolyte filler to a polymer solid-state electrolyte.

[0077] In some embodiments, the electrode assembly is in a jelly-roll structure. The positive electrode sheet and the negative electrode sheet are wound into the jelly-roll structure.

[0078] In some embodiments, the electrode assembly is in a stacked structure.

[0079] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets can be provided, and the plurality of positive electrode sheets and the plurality of negative electrode sheets can be alternately stacked.

[0080] 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.

[0081] As an example, the positive electrode sheet and the negative electrode sheet can each be folded to form a plurality of folded segments that are stacked.

[0082] As an example, a plurality of separators can be provided, and each of the plurality of separators can be disposed between any adjacent positive electrode sheet or negative electrode sheet.

[0083] As an example, the separators can be continuously provided and disposed between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0084] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a polygonal shape.

[0085] In some embodiments, the electrode assembly can be provided with tabs. The tabs can guide current out of the electrode assembly. The tabs can include positive tabs and negative tabs.

[0086] In some embodiments, the battery cell can include a housing. The housing can be used to encapsulate the electrode assembly and other components such as the electrolyte. The housing can be a steel case, an aluminum case, a plastic case (e.g., polypropylene), a composite metal case (e.g., a copper-aluminum composite case), or an aluminum-plastic film, or the like.

[0087] 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, the prismatic battery cell including but not limited to a square battery cell, a blade battery cell, a multi-prismatic battery cell, for example, a hexagonal battery cell, etc.

[0088] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0089] In some embodiments, the 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 formed by arranging and fixing a plurality of battery cells into an independent module.

[0090] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box.

[0091] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box.

[0092] As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box.

[0093] 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 buckled so that a closed space is formed inside the box to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box body can be a top cover or a bottom plate.

[0094] 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 a closed space is formed inside the box to accommodate the battery cell assembly.

[0095] As an example, the box can be part of the 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.

[0096] In some embodiments, the battery apparatus refers to an energy storage device, which includes a box, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0097] Battery devices have the advantages of high energy density, less environmental pollution, high power density, long service life, wide adaptability, and small self-discharge coefficient, and are an important part of the development of new energy. The development of battery technology needs to consider many factors, such as energy density, cycle life, discharge capacity, and charge-discharge rate. In addition, the reliability of the battery device also needs to be considered.

[0098] With the rapid development of new energy technology, higher requirements are put forward for the reliability of battery devices. There are many circuit boards in the battery device, which are usually installed in a circuit board shell. The circuit board shell can protect the circuit board inside, such as resisting impact, corrosion, short circuit, etc. In related technologies, the circuit board shell is an integrated folding and buckling type. When multiple rework is required, the circuit board shell is repeatedly folded and opened, and the middle connection is easy to break, resulting in poor reliability. Especially in the current demand for extreme lightweight, the circuit board shell will be thinner, and the risk of breaking the middle connection will further increase.

[0099] To this end, the embodiments of the present application provide a battery device, comprising: a battery monomer; a circuit board electrically connected to the battery monomer; a circuit board shell comprising a first shell and a second shell, the second shell being connected to the first shell to form a containing space for containing the circuit board; the first shell comprises a first shell body and two first side walls connected to the first shell body on opposite sides in a first direction, the first side wall extends in a second direction, at least one first side wall is provided with a clamping part, and the second direction intersects the first direction; the second shell comprises a first side part on at least one side in the first direction, and the second shell is configured to be buckled to the first shell in the second direction to enable the first side part to be clamped with the clamping part.

[0100] The circuit board shell is connected by the mutual buckling and clamping of the split first shell and the second shell, forming a containing space for containing the circuit board, so that the connection is more reliable, the circuit board is better protected, and the reliability is improved. Even in the case of multiple opening and closing of the circuit board shell, reliable connection can be maintained, eliminating the problem of easy breakage of the middle connection of the previous integrated folding shell when repeatedly folded and opened.

[0101] The battery device disclosed in the embodiments of the present application can be used in electric devices such as vehicles, ships, or aircraft, but is not limited to this. The power supply system of the electric device can be composed of the battery device disclosed in the present application to improve the use reliability of the battery device.

[0102] The embodiments of the present application provide a power consumption device using a battery device as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

[0103] The following embodiments are described by taking a power consumption device as a vehicle in an embodiment of the present application as an example for convenience of description.

[0104] With reference to Figure 1 , the vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile. The vehicle 1000 is internally provided with a battery device 100. The battery device 100 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, as an operating power supply or a use power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery 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.

[0105] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply or a use power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0106] Please refer to Figure 2 and Figure 3 , the box body 10 is used to provide an assembly space for the battery monomer 20. 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. The first box body 11 and the second box body 12 are mutually covered. The first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery monomer 20. The second box body 12 can be a hollow structure with one end open. The first box body 11 can be a plate-shaped structure. The first box body 11 is covered on the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space. The first box body 11 and the second box body 12 can also be hollow structures with one side open. The open side of the first box body 11 is covered on the open side of the second box body 12.

[0107] Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, or a square, etc. Exemplarily, in Figure 2 the present embodiment, the box body 10 is in a cuboid shape.

[0108] In the battery device 100, a plurality of battery monomers 20 are arranged in the box body 10, and the plurality of battery monomers 20 can be in series connection, parallel connection, or mixed connection, where the mixed connection means that the plurality of battery monomers 20 are in both series connection and parallel connection. The plurality of battery monomers 20 can be directly connected in series, parallel, or mixed connection, and then the whole of the plurality of battery monomers 20 is accommodated in the box body 10. Of course, the battery device 100 can also be in a form that the plurality of battery monomers 20 are first connected in series, parallel, or mixed connection to form a battery module, and then the plurality of battery modules are connected in series, parallel, or mixed connection to form a whole, and the whole is accommodated in the box body 10.

[0109] 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 monomers 20 to realize electrical connection between the plurality of battery monomers 20.

[0110] Each of the battery monomers 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 monomer 20 can be in a cuboid, a cylinder, a prism, or other shapes, etc. Exemplarily, in Figure 3 the present embodiment, the battery monomer 20 is in a cuboid structure.

[0111] As an example, referring to Figure 3 , the battery monomer 20 includes a battery monomer shell 21 and an electrode assembly 22 arranged in the battery monomer shell 21.

[0112] The battery monomer shell 21 can also be used to accommodate an electrolyte, for example, an electrolyte solution. The battery monomer shell 21 can be in various structural forms, for example, a cylinder or a cuboid, etc. Similarly, the material of the battery monomer shell 21 can also be various, for example, copper, iron, aluminum, steel, or aluminum alloy, etc.

[0113] Optionally, the battery monomer shell 21 can include a shell body 211 and an end cover 212, the inside of the shell body 211 is formed with an accommodation cavity for accommodating the electrode assembly 22, and the accommodation cavity has an opening, that is, the shell body 211 is a hollow structure with an opening at one end, and the end cover 212 is sealed to the opening of the shell body 211 to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.

[0114] 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

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] For example, the electrode terminal 23 can be made of various materials, such as copper, iron, aluminum, steel or aluminum alloy.

[0122] 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.

[0123] 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 11 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.

[0124] The following reference Figure 5 The embodiments of this application will be described in detail below.

[0125] 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 to form a containing space for containing the circuit board 30; the first shell 41 comprises a first shell main body 411 and two first side walls 412 connected to the first shell main body 411 on opposite sides along a first direction X, the first side wall 412 extends along a second direction Z, at least one first side wall 412 is provided with a clamping part 413, and the second direction Z intersects with the first direction X; the second shell 42 comprises a first side part 421 on at least one side along the first direction X, and the second shell 42 is configured to be capable of being buckled to the first shell 41 along the second direction Z, so that the first side part 421 is clamped with the clamping part 413.

[0126] The battery monomer 20 is a source of electrical energy required for an electrochemical reaction. The battery monomer 20 stores and releases energy through a chemical reaction, thereby providing power for external devices. The shape of the battery monomer 20 can be various, such as cylindrical, square, prismatic, etc. The battery monomer 20 can also be a soft pack battery. The number of battery monomers 20 can be one or more, and when there are multiple battery monomers 20, the multiple battery monomers 20 can be connected in parallel or series. The present application does not particularly limit the battery monomer 20.

[0127] The circuit board 30 is electrically connected with the battery monomer 20. The circuit board 30 can be a master control board in a battery management system (BMS), which can be integrated with a microcontroller, a battery voltage detection circuit, a current detection circuit, a temperature detection circuit, a communication module, etc., for monitoring, managing and protecting the running state of the battery monomer 20, so that the battery monomer 20 can run efficiently and the service life of the battery monomer 20 can be improved. Of course, the circuit board 30 can also be other circuit boards in the battery device 100, such as a control board in a battery monitoring unit (CSC), etc.

[0128] The circuit board shell 40 comprises the first shell 41 and the second shell 42, and the second shell 42 is connected with the first shell 41 to form a containing space for containing the circuit board 30. The circuit board shell 40 plays a protective role for the circuit board 30, such as resisting vibration impact when falling, resisting impact of spewing materials when thermal runaway, etc.

[0129] The first shell 41 and the second shell 42 are two separate parts. The first shell 41 comprises a first shell main body 411 and two first side walls 412 connected to the first shell main body 411 on opposite sides along a first direction X, and the first side wall 412 extends along a second direction Z.

[0130] The first shell main body 411 is a part of the first shell 41 that mainly protects the circuit board 30. The first side wall 412 is a part of the first shell 41 connected with the second shell 42.

[0131] The two first side walls 412 are connected to the first housing body 411 on opposite sides along a first direction X and extend along a second direction Z, the first direction X and the second direction Z being intersected, for example, perpendicular. The first direction X can be the length direction of the first housing body 411, and the second direction Z can be the vertical direction.

[0132] The first side wall 412 and the first housing body 411 can be integrally formed. For example, by insert molding, of course, by injection molding.

[0133] The first side wall 412 can be provided with a clamping portion 413, and the second housing 42 can include two first side portions 421 along the first direction X.

[0134] The first side wall 412 can be provided with a clamping portion 413, and the second housing 42 can include two first side portions 421 along the first direction X.

[0135] The clamping portion 413 is used to clamp with the first side portion 421 to limit the displacement of the second housing 42 relative to the first housing 41 along the second direction Z, so as to firmly connect the second housing 42 to the first housing 41. The number of clamping portions 413 on the first side wall 412 can be one or more. When the clamping portions 413 are multiple, the multiple clamping portions 413 can be distributed along a third direction Y, the third direction Y, the second direction Z and the first direction X can be perpendicular to each other.

[0136] As an example, during installation, the second housing 42 can be buckled on the first housing 41 along the second direction Z, so that the two first side portions 421 are clamped with the clamping portions 413 on the two first side walls 412 respectively, so that the first housing 41 and the second housing 42 jointly form a containing space for containing the circuit board 30.

[0137] By the way of mutual buckling and clamping of the two split first housing 41 and second housing 42, a containing space for containing the circuit board 30 is jointly formed, so that the connection is more reliable, the circuit board 30 can be better protected, and the reliability is improved. Even in the case of multiple opening and closing of the circuit board housing 40, the connection reliability can be maintained, and the problem of easy fracture of the middle connection caused by repeated folding and opening of the conventional integrated folding housing is eliminated.

[0138] In some embodiments, the clamping portion 413 is a first protrusion 414, and the first protrusion 414 protrudes from the inner side surface 412a of the first side wall 412.

[0139] The opposite side of the two first side walls 412 along the first direction X is the inner side surface 412a (the side of the first side wall 412 facing the circuit board 30) Figure 4 to Figure 7The first protrusions 414 on the two first side walls 412 can be one-to-one corresponding. Of course, they can also be non-corresponding, for example, staggered along the third direction Y. The number of the first protrusions 414 on the two first side walls 412 can be the same. Of course, they can also be different.

[0140] The first protrusions 414 can be formed by recessing the outer side of the first side wall 412 towards the inner side 412a. The first protrusions 414 can be integrally formed with the first side wall 412. For example, they can be formed by plastic injection, of course, they can also be formed by plastic vacuum forming.

[0141] When the second housing 42 is buckled on the first housing 41 along the second direction Z, the two first side portions 421 of the second housing 42 are respectively engaged with the first protrusions 414 on the two first side walls 412 to limit the displacement of the second housing 42 relative to the first housing 41 along the second direction Z.

[0142] By taking the first protrusions 414 as the engaging portions 413, it is easy to form the first protrusions 414 on the inner side 412a of the first side wall 412, thereby improving the production efficiency.

[0143] In some embodiments, with reference to Figure 4 to Figure 7 , the first side portions 421 are clamped between the first protrusions 414 and the first housing body 411.

[0144] Along the second direction Z, the first protrusions 414 and the first housing body 411 have a gap therebetween for clamping the first side portions 421.

[0145] The two first side portions 421 can be two edge portions of the second housing 42 along the first direction X. As an example, the second housing 42 comprises a second housing body 423 and two edge portions connected to the second housing body 423 and protruding outwardly. Specifically, with reference to Figure 5 , when the second housing 42 is buckled on the first housing 41 along the second direction Z, the edge portions of the second housing 42 along the first direction X interfere with the first protrusions 414, causing the second housing 42 to be slightly deformed, and when the edge portions pass through the first protrusions 414, the second housing 42 restores the deformation, and the edge portions are clamped into the gap between the first protrusions 414 and the first housing body 411 to limit the displacement of the second housing 42 relative to the first housing 41 along the second direction Y.

[0146] By clamping the first side portions 421 of the second housing 42 between the first protrusions 414 and the first housing body 411, the engagement between the second housing 42 and the first housing 41 is achieved to limit the displacement of the second housing 42 relative to the first housing 41 along the first direction Y, and by using the two edge portions of the second housing 42 along the first direction X to cooperate with the first protrusions 414, there is no need to provide a complex clamping structure on the second housing 42, thereby being able to simplify the structure and reduce the cost.

[0147] In some embodiments, referring to Figure 4 , the first housing body 411 includes a first face 411a and a second face 411b opposite to each other along the second direction Z, the second face 411b is closer to the first protrusion 414 than the first face 411a; the first side portion 421 includes a third face 421a and a fourth face 421b opposite to each other along the second direction Z, the third face 421a abuts against the second face 411b, and the fourth face 421b abuts against the first protrusion 414.

[0148] A gap is formed between the first protrusion 414 and the second face 411b, the first side portion 421 is clamped into the gap, and the third face 421a of the first side portion 421 abuts against the second face 411b and the fourth face 421b abuts against the first protrusion 414, so that the first side portion 421 is clamped between the first protrusion 414 and the first housing body 411. Optionally, the second face 411b and the third face 421a can be flat surfaces.

[0149] As an example, referring to Figure 5 and Figure 4 , the first housing body 411 is formed with a first recess, an edge of the first recess along the first direction X is outwardly protruded to form a first protruding edge, one end of the first side wall 412 is connected to the first protruding edge, and the other end extends along the second direction Z, the first protruding edge has the first face 411a and the second face 411b opposite to each other along the second direction Z. The second housing 42 is formed with a second recess, an edge of the second recess along the first direction X is outwardly protruded to form a second protruding edge, the second protruding edge has the third face 421a and the fourth face 421b opposite to each other along the second direction Z, and when the second housing 42 is clamped and connected with the first housing 41, the first recess and the second recess form a receiving space for accommodating the circuit board 30.

[0150] Figure 5 and Figure 8 to Figure 11 Although it is shown that both the first housing 41 and the second housing 42 have recesses, it can be understood that one of the first housing 41 and the second housing 42 can be a flat plate, and the other has a recess. For example, the first housing 41 has a first recess for accommodating the circuit board 30, and the second housing 42 can be a flat plate.

[0151] When the second housing 42 is clamped and connected with the first housing 41, the third face 421a of the first side portion 421 abuts against the second face 411b of the first housing body 411, and the fourth face 421b of the first side portion 421 abuts against the first protrusion 414, so that the first side portion 421 is firmly limited between the first protrusion 414 and the first housing body 411, reducing the risk of the second housing 42 shaking along the second direction Z to disengage from the first housing 41, improving the connection reliability, and thus reliably protecting the circuit board 30.

[0152] In some embodiments, referring toFigure 4 The second shell 42 comprises a second shell body 423, and a first side portion 421 connected to the second shell body 423 and extending along the second direction Z. The first side portion 421 is formed with a first clamping groove 424 for clamping the first protrusion 414.

[0153] The second shell body 423 is the part of the second shell 42 that mainly protects the circuit board 30. The first side portion 421 extends along the second direction Z to form a side wall of the second shell 42. Both the first shell 41 and the second shell 42 have a side wall extending along the second direction Z. For example, the first side portion 421 can be parallel to the first side wall 412. As an example, two first side portions 421 are provided, and the two first side portions 421 are connected to the second shell body 423 on opposite sides along the first direction X, and each first side portion 421 extends along the second direction Z.

[0154] The first side portion 421 is formed with the first clamping groove 424, and when the second shell 42 is buckled on the first shell 41 along the second direction Z, the first protrusion 414 is clamped into the first clamping groove 424 to achieve clamping. The first clamping groove 424 can be formed by recessing the inner side of the first side portion 421 towards the outer side. The first clamping groove 424 can be integrally formed with the first side portion 421. For example, it can be formed by suction molding, and of course it can also be formed by injection molding.

[0155] By extending the first side portion 421 along the second direction Z, the first side portion 421 is formed with the first clamping groove 424 for clamping the first protrusion 414. This can improve the clamping strength of the first protrusion 414 and the first clamping groove 424, reduce the risk of the first shell 41 and the second shell 42 being separated due to shaking, and improve the connection reliability.

[0156] In some embodiments, with reference to Figure 4 to Figure 7 The first shell 41 further comprises a second side wall 415 connected to the first shell body 411 on one side along the third direction Y, and the second side wall 415 extends along the second direction Z. The first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0157] As an example, the two ends of the second side wall 415 along the first direction X can be connected to two first side walls 412.

[0158] By having the first shell 41 with the second side wall 415 on one side along the third direction Y, the displacement of the second shell 42 along the third direction Y can be limited, the risk of the first shell 41 and the second shell 42 being separated can be reduced, and the reliability can be improved.

[0159] In some embodiments, the second side wall 415 is provided with a second protrusion 416 protruding from the inner side of the second side wall 415; the second housing 42 further comprises a second side portion 422 on one side of the third direction Y, which is clamped between the second protrusion 416 and the first housing body 411.

[0160] The second protrusion 416 can be recessed from the outer side to the inner side of the second side wall 415. The second protrusion 416 can be integrally formed with the second side wall 415. The second side wall 415 can be integrally formed with the first housing body 411. The above-mentioned integrally formed manner can be, for example, a plastic suction integrally formed manner, and of course can also be an injection molding integrally formed manner.

[0161] The number of second protrusions 416 can be one or more. When the second protrusions 416 are multiple, the second protrusions 416 can be distributed at intervals along the first direction X.

[0162] The second side portion 422 can be a flange extending along the third direction Y of the second housing 42. As an example, the second housing 42 comprises a second housing body 423, and the second side portion 422 is connected to the second housing body 423 and protrudes outwardly to form a flange. Specifically, with reference to Figure 8 , when the second housing 42 is buckled to the first housing 41 along the second direction Z, the second side portion 422 interferes with the second protrusion 416, causing the second side portion 422 to be slightly deformed, and when the second side portion 422 passes the second protrusion 416, the second side portion 422 restores the deformation and is clamped into the gap between the second protrusion 416 and the first housing body 411 to achieve clamping.

[0163] Through the second side wall 415 of the first housing 41 along the third direction Y, the second side wall 415 is provided with the second protrusion 416, and when the second housing 42 is buckled to the first housing 41 along the second direction Z, the second side portion 422 of the second housing 42 is clamped between the second protrusion 416 and the first housing body 411 to limit the displacement of the second housing 42 relative to the first housing 41 along the second direction Y, and the second side wall 415 extending along the second direction Z can also limit the displacement of the second housing along the third direction Y, thereby the connection between the first housing 41 and the second housing 42 is more reliable, reducing the risk of separation of the two, and improving reliability.

[0164] In some embodiments, with reference to Figure 2 to Figure 11 , the second side wall 415 is provided with a third protrusion 417 protruding from the inner side of the second side wall 415; the second housing 42 further comprises a second side portion 422 connected to the second housing body 423 on one side of the third direction Y, and the second side portion 422 extends along the second direction Z; wherein the second side portion 422 is formed with a second clamping groove 425 clamped and matched with the third protrusion 417.

[0165] The two ends of the second side wall 415 along the second direction Y can be connected with the two first side walls 412 respectively.

[0166] The third protrusion 417 can be formed by recessing the outer side of the second side wall 415 towards the inner side. The third protrusion 417 can be integrally formed with the second side wall 415. The second side wall 415 can be integrally formed with the first housing body 411. The above-mentioned integrally formed manner can be, for example, a plastic absorption integrally formed manner, and of course can be an injection molding integrally formed manner.

[0167] The number of the third protrusion 417 can be one or more. When the third protrusion 417 is multiple, the third protrusions 417 can be distributed at intervals along the first direction X.

[0168] The second side portion 422 extends along the second direction Z to form another side wall of the second housing 42. For example, the second side portion 422 can be parallel to the second side wall 415.

[0169] The second side portion 422 is formed with a second clamping groove 425, and when the second housing 42 is buckled to the first housing 41 along the second direction Z, the third protrusion 417 is clamped into the second clamping groove 425 to achieve clamping. The second clamping groove 425 can be formed by recessing the inner side of the second side portion 422 towards the outer side. The second clamping groove 425 can be integrally formed with the second side portion 422. For example, plastic absorption molding, and of course can be injection molding.

[0170] By extending the second side portion 422 along the second direction Z, the second side portion 422 is formed with the second clamping groove 425 for clamping the third protrusion 417, which further improves the connection strength of the first housing 41 and the second housing 42, reduces the risk of the first housing 41 and the second housing 42 being separated due to shaking, and improves the connection reliability.

[0171] In some embodiments, the first housing 41 further comprises a second side wall 415 and a third side wall 418 connected to the first housing body 411 along the opposite two sides of the third direction Y, and the second side wall 415 and the third side wall 418 both extend along the second direction Z, and the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0172] The second side wall 415 and the third side wall 418 are used to limit the displacement of the second housing 42 along the third direction Y, the two first side walls 412 are used to limit the displacement of the second housing 42 along the first direction X, and the first protrusion 414 is clamped with the first side portion 421 to limit the displacement of the second housing 42 along the second direction Z.

[0173] Therefore, the displacement of the second housing 42 along the first direction X, the second direction Z and the third direction Y is limited, which further reduces the risk of the first housing 41 and the second housing 42 being separated due to shaking.

[0174] In some embodiments, the third side wall 418 is provided with a relief 418a for avoiding a connector (not shown in the figure) on the circuit board 30.

[0175] The relief 418a can be one opening extending along the first direction X, or a plurality of openings corresponding to the plurality of connectors one by one.

[0176] The relief 418a facilitates the connection of the connector on the circuit board 30 with the battery cell 20, and improves the installation efficiency.

[0177] In some embodiments, the first housing body 411 is formed with a first recess (not labeled in the figure); the circuit board 30 is at least partially located in the first recess.

[0178] The circuit board 30 can be entirely located in the first recess, or partially located in the first recess.

[0179] As an example, the circuit board 30 is fixed in the first recess by fasteners (such as bolts), the circuit board 30 is provided with a plurality of lock holes around its periphery, and the first recess is provided with mounting posts corresponding to the plurality of lock holes one by one, and the fasteners pass through the lock holes and are connected with the mounting posts.

[0180] By locating the circuit board 30 in the first recess, the degree of shaking of the circuit board 30 can be reduced, and the circuit board 30 is better protected.

[0181] In some embodiments, the first housing 41 and the second housing 42 are both vacuum formed parts.

[0182] The vacuum formed parts can make the first housing 41 and the second housing 42 thinner, thereby being more lightweight, and higher in molding efficiency.

[0183] The following refers to Figure 4 to Figure 7 , a specific example of the present application is described in detail.

[0184] The embodiments of the present application provide a battery device 100, comprising a battery cell 20, a battery management system (BMS), the battery management system (BMS) comprising a circuit board 30 and a circuit board housing 40, the circuit board housing 40 comprising a first housing 41 and a second housing 42 arranged separately, the first housing 41 and the second housing 42 can be buckled and clamped up and down (second direction Z) to jointly form an accommodation space for accommodating the circuit board 30.

[0185] The buckling and clamping mode of the first housing 41 and the second housing 42 can be two, as follows.

[0186] The first scheme: refer to Figure 8 to Figure 11The first outer shell 41 includes a first outer shell body 411, two first sidewalls 412 connected to opposite sides of the first outer shell body 411 along a first direction X, and a second sidewall 415 and a third sidewall 418 connected to opposite sides of the first outer shell body 411 along a third direction Y. The first sidewalls 412 and the second sidewalls 415 both extend along a second direction Z. The first sidewalls 412 are formed with a plurality of first protrusions 414 protruding from their inner surfaces, and the second sidewalls 415 are formed with a plurality of second protrusions 416 protruding from their inner surfaces.

[0187] The second housing 42 includes two first side portions 421 along a first direction X and two second side portions 422 along a third direction Y. When the second housing 42 is fastened to the first housing 41 along the second direction Z, the two first side portions 421 respectively engage with the first protrusions 414 of the two first sidewalls 412, that is, the first side portions 421 are engaged between the first sidewalls 412 and the first housing body 411, and the second side portions 422 engage with the second protrusions 416 of the second sidewalls 415, that is, the second side portions 422 are engaged between the second sidewalls 415 and the first housing body 411, thereby restricting the displacement of the second housing 42 along the second direction Z. The first sidewalls 412 restrict the displacement of the second housing 42 along the first direction X, and the second sidewalls 415 and the third sidewalls 418 restrict the displacement of the second housing 42 along the third direction Y. Thus, the first housing 41 and the second housing 42 can be reliably connected, better protecting the circuit board 30 and improving reliability.

[0188] In the above scheme, the first side portion 421 and the second side portion 422 on the second outer shell 42 both extend in the horizontal direction, that is, the edge of the second outer shell 42 has no sidewall.

[0189] The second option: Refer to ​ The second solution differs from the first solution in that the second outer shell 42 also has sidewalls along the first direction X and the third direction Y, and the sidewalls have slots that engage with the protrusions of the first outer shell 41.

[0190] Specifically, the two first side portions 421 along the first direction X and the two second side portions 422 along the third direction Y both extend along the second direction Y, forming two side walls parallel to the first side wall 412 and the second side wall 415 respectively. The first side portions 421 are provided with first clamping slots 424 connected with the first protrusions 414, and the second side portions 422 are provided with second clamping slots 425 connected with the third protrusions 417. When the second shell 42 is buckled to the first shell 41 along the second direction Z, the first protrusions 414 of the two first side walls 412 are respectively embedded in the first clamping slots 424 of the two first side portions 421, and the third protrusions 417 of the second side wall 415 are embedded in the second clamping slots 425 of the second side portions 422, so as to limit the displacement of the second shell 42 along the second direction Z. The first side wall 412 limits the displacement of the second shell 42 along the first direction X, and the second side wall 415 and the third side wall 418 limit the displacement of the second shell 42 along the third direction Y. Thus, the first shell 41 and the second shell 42 can be reliably connected, better protecting the circuit board 30 and improving the reliability.

[0191] In a second aspect, the embodiments of the present application provide a power consumption device, which comprises the battery device 100 mentioned in any of the above embodiments.

[0192] Since the power consumption device comprises the battery device 100 mentioned in any of the above embodiments, the circuit board in the battery device 100 can be reliably protected by the circuit board shell 40, so as to also improve the reliability of the power consumption device in the process of using the battery device 100.

[0193] The above only describes 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 by, The battery device comprises: a battery cell; a circuit board electrically connected to the battery cell; a circuit board housing comprising a first housing and a second housing connected to the first housing to form a receiving space for receiving the circuit board; the first housing comprises a first housing body and two first side walls connected to opposite sides of the first housing body in a first direction, the first side walls extend in a second direction, at least one of the first side walls is provided with a clamping portion, and the second direction intersects the first direction; the second housing comprises a first side portion on at least one side in the first direction, and the second housing is configured to be clamped to the first housing in the second direction so that the first side portion is clamped with the clamping portion; the clamping portion is a first protrusion protruding from an inner side surface of the first side wall; the first side portion is clamped between the first protrusion and the first housing body; the first housing body comprises a first surface and a second surface opposite to the first surface in the second direction, and the second surface is closer to the first protrusion than the first surface; the first side portion comprises a third surface and a fourth surface opposite to the third surface in the second direction, and the third surface abuts against the second surface, and the fourth surface abuts against the first protrusion.

2. The battery device according to claim 1, wherein the second housing comprises a second housing body, and the first side portion is connected to the second housing body and extends in the second direction; wherein the first side portion is formed with a first clamping groove matched with the first protrusion.

3. The battery device according to claim 1, wherein the first housing further comprises a second side wall connected to one side of the first housing body in a third direction, the second side wall extends in the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device according to claim 3, wherein the second side wall is provided with a second protrusion protruding from an inner side surface of the second side wall; the second housing further comprises a second side portion on one side in the third direction, and the second side portion is clamped between the second protrusion and the first housing body.

5. The battery device according to claim 3, wherein the second side wall is provided with a third protrusion protruding from an inner side surface of the second side wall; the second housing further comprises a second side portion on one side in the third direction, and the second side portion extends in the second direction; wherein the second side portion is formed with a second clamping groove matched with the third protrusion.

6. The battery device according to claim 3, wherein the first housing further comprises a third side wall connected to the first housing body, the third side wall is arranged opposite to the second side wall in the third direction, and the third side wall is provided with a clearance for avoiding a connector on the circuit board.

7. The battery device according to claim 1, wherein the first housing body is formed with a first recess. The circuit board is at least partially located in the first recess.

8. The battery device of claim 1, wherein, The first housing and the second housing are both blister members.

9. An electrical device, characterized by Comprising: The battery device of any one of claims 1-8.

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