Battery device and electric device

Abstract

The embodiment of the present application provides a battery device and a power utilization device. The battery device comprises a box body, a battery management system and a battery cell. The box body has an electrical compartment and a battery compartment arranged along a first direction. The box body comprises a first wall, a second wall and a third wall. The second wall and the third wall are oppositely arranged with the first wall along a second direction. The electrical compartment is formed between the first wall and the second wall. The battery compartment is formed between the first wall and the third wall. The second wall is closer to the first wall than the third wall. The second direction is perpendicular to the first direction. The battery management system is accommodated in the electrical compartment. The battery cell is accommodated in the battery compartment and electrically connected with the battery management system. The battery management system comprises a box body and an electrical component. The box body has an accommodation space and an opening which are communicated with each other. The second wall covers the opening. The electrical component is accommodated in the accommodation space and connected with the second wall. The battery device can improve the space utilization.

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] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] Battery devices are widely used in portable electronic devices, electric vehicles, power tools, unmanned aerial vehicles, energy storage devices and other fields. During the use of the battery device, the space utilization of the battery device is a problem that cannot be ignored. Therefore, how to improve the space utilization of the battery device is a technical problem that needs to be solved in the battery technology. SUMMARY

[0004] The embodiments of the present application provide a battery device and a power utilization device, which can improve the space utilization of the battery device.

[0005] In a first aspect, the embodiments of the present application provide a battery device, comprising a box body, a battery management system and a battery monomer; the box body has an electrical compartment and a battery compartment arranged along a first direction; the box body comprises a first wall, a second wall and a third wall, the second wall and the third wall are oppositely arranged with the first wall along a second direction, the electrical compartment is formed between the first wall and the second wall, and the battery compartment is formed between the first wall and the third wall; the second wall is closer to the first wall than the third wall, and the second direction is perpendicular to the first direction; the battery management system is accommodated in the electrical compartment; the battery monomer is accommodated in the battery compartment and electrically connected with the battery management system; wherein the battery management system comprises a box and an electrical component, the box has an accommodation space and an opening which are in communication with each other, the second wall covers the opening, and the electrical component is accommodated in the accommodation space and connected to the second wall.

[0006] In the above technical solution, by arranging the second wall closer to the first wall than the third wall, the size of the electrical compartment along the second direction is smaller than the size of the battery compartment along the second direction, thereby reducing the space occupation of the electrical compartment. By arranging the electrical component connected to the second wall and accommodated in the accommodation space of the box, the box can have a smaller size along the second direction, thereby reducing the space occupation of the battery management system along the second direction, allowing a smaller distance between the second wall and the first wall, further reducing the space occupation of the electrical compartment and improving the space utilization of the battery device.

[0007] In some embodiments, the third wall has a first surface facing away from the first wall, and the minimum distance between the second wall and the first surface in the second direction is 50-100 mm. The minimum distance between the second wall and the first surface in the second direction is greater than or equal to 50 mm, which can make the side of the second wall away from the electrical compartment have a larger redundant space, facilitate the arrangement of other components, and reduce the difficulty of arranging other components. The minimum distance between the second wall and the first surface in the second direction is less than or equal to 100 mm, which can make the electrical compartment have a larger space, facilitate the arrangement of components such as the battery management system, and reduce the difficulty of arranging the battery management system. Therefore, the minimum distance between the second wall and the first surface in the second direction is 50-100 mm, which can reduce the difficulty of arranging components on both sides of the second wall and improve the space utilization of the battery device.

[0008] In some embodiments, the battery management system includes a connection terminal and a conductive wire harness; the connection terminal is electrically connected with the electrical component; and the conductive wire harness is connected with the connection terminal and at least partially embedded in the wall portion of the box body. By embedding at least part of the conductive wire harness in the wall portion of the box body, the box body and the conductive wire harness can share a part of the height space, which facilitates reducing the size of the box body in the second direction, so that a smaller distance can be arranged between the second wall and the first wall, which facilitates reducing the space occupation of the electrical compartment and improving the space utilization of the battery device.

[0009] In some embodiments, the electrical component includes a relay, the relay is electrically connected with the connection terminal, and at least one of the size of the relay in the first direction and the size of the relay in the third direction is greater than the size of the relay in the second direction, and the first direction, the second direction and the third direction are perpendicular to each other. In this way, the size of the relay in the second direction can be reduced, the influence of the relay on the size of the box body in the second direction can be reduced, the size of the box body in the second direction can be further reduced, the space occupation of the electrical compartment can be further reduced, and the space utilization of the battery device can be improved.

[0010] In some embodiments, the first wall is provided with an access opening, the access opening is in communication with the electrical compartment; and the box body further includes an access cover, the access cover is arranged on the access opening and detachably connected with the first wall. By connecting the box body and the electrical component to the second wall, the battery management system of the second wall can be directly maintained through the access opening of the first wall, which reduces the maintenance difficulty of the battery management system. By detachably connecting the access cover with the first wall, when the components in the electrical compartment are maintained, the components in the electrical compartment can be maintained only by removing the access cover, which reduces the maintenance difficulty of the electrical compartment.

[0011] In some embodiments, the cabinet includes a frame, the first wall, the second wall and the third wall are connected to the frame; the first wall includes a first part and a second part, the electrical compartment is formed between the first part and the second wall, the battery compartment is formed between the second part and the third wall, and the access opening is arranged on the first part; the first part is detachably connected to the frame. By detachably connecting the first part to the frame, the components in the electrical compartment can be replaced by removing the first part, which is conducive to reducing the maintenance difficulty of the electrical compartment.

[0012] In some embodiments, the cabinet includes a frame, the first wall, the second wall and the third wall are connected to the frame; the first wall includes a first part and a second part, the electrical compartment is formed between the first part and the second wall, the battery compartment is formed between the second part and the third wall, and the access opening is arranged on the first part; the second part is detachably connected to the frame. By detachably connecting the second part to the frame, the battery compartment can be maintained and maintained by removing the second part, which is conducive to reducing the maintenance difficulty of the battery compartment.

[0013] In some embodiments, the cabinet further includes a bottom guard plate, the bottom guard plate is connected to the first wall and located on the side of the first wall away from the second wall, and a projection of the bottom guard plate along the second direction covers at least a part of the electrical compartment. In this way, the bottom guard plate can improve the strength of the first wall, reduce the risk of damage to the first wall and damage to the components in the electrical compartment, and improve the reliability of the battery device.

[0014] In some embodiments, the projection of the bottom guard plate along the second direction completely covers the electrical compartment. In this way, the risk of damage to the components in the electrical compartment by external force can be further reduced, and the reliability of the battery device is improved.

[0015] In a second aspect, the embodiments of the present application provide a power utilization device including the battery device provided by any one of the embodiments of the first aspect.

[0016] In some embodiments, the power utilization device further includes a power distribution module, the power distribution module is arranged on the surface of the second wall away from the first wall along the second direction, and the power distribution module is electrically connected to the battery device. By arranging the power distribution module on the surface of the second wall away from the first wall along the second direction, on the one hand, the space utilization rate of the battery device can be improved, the space waste of the battery device can be reduced, and the layout structure of the power utilization device is optimized. On the other hand, the power distribution module and the battery device are relatively close, which can shorten the path of the connection harness between the power distribution module and the battery device, reduce energy consumption, and also reduce the electromagnetic interference of the power distribution module on other components of the power utilization device.

[0017] In some embodiments, the third wall has a first surface facing away from the first wall, and the power distribution module does not protrude beyond the first surface in a direction of the first wall pointing to the second wall. In this way, the power distribution module does not protrude beyond the first surface, which can reduce the risk of interference between the power distribution module and other components of the electrical device, and improve the structural stability of the power distribution module. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be considered as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 A structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0020] Figure 2 A structural schematic diagram of a battery device provided by some embodiments of the present application;

[0021] Figure 3 A structural schematic diagram of a vehicle provided by some embodiments of the present application; Figure 2 A-A sectional view of the vehicle;

[0022] Figure 4 A partial enlarged view of the B area in the vehicle; Figure 3

[0023] Figure 5 An exploded view of a battery device provided by some embodiments of the present application;

[0024] Figure 6 An exploded view of a battery management system provided by some embodiments of the present application;

[0025] Figure 7 A partial schematic view of a battery management system provided by some embodiments of the present application;

[0026] Figure 8 An exploded view of a battery device provided by some other embodiments of the present application;

[0027] Figure 9 A structural schematic diagram of a vehicle provided by some other embodiments of the present application.

[0028] ​Icon: 1 - box; 1a - electrical compartment; 1b - battery compartment; 11 - first wall; 111 - access opening; 112 - first part; 113 - second part; 12 - second wall; 121 - first outer surface; 13 - third wall; 131 - first surface; 14 - partition wall; 15 - access cover; 16 - bezel; 17 - bottom guard plate; 2 - battery management system; 21 - box body; 211 - opening; 212 - containing space; 22 - electrical component; 221 - relay; 23 - connection terminal; 24 - conductive wire harness; 3 - battery monomer; 10 - battery device; 20 - controller; 30 - motor; 40 - power distribution module; 100 - vehicle; X - first direction; Z - second direction; Y - third direction. DETAILED DESCRIPTION

[0029] 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 clearly described 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.

[0030] 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 specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, rather than to describe a particular order or primary and secondary relationship.

[0031] In the present application, the phrase "embodiment" means that the specific features, structures or properties described in conjunction 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 refer to the same embodiment, nor is it a separate or alternative embodiment independent of or to other embodiments.

[0032] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect", "attach" 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; it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] The term "and / or", as used in this application, merely describes an associated relationship, which means that there can be three relationships, for example, A and / or B, which can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this application generally represents an "or" relationship between the front and rear associated objects.

[0034] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, detailed descriptions of the same components are 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, as well as the overall thickness, length, width, and other dimensions of integrated devices, are only exemplary and should not constitute any limitation on the present application.

[0035] "Multiple" appearing in this application means two or more (including two).

[0036] 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 to continue use.

[0037] The battery cell includes, but is not limited to, 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.

[0038] 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 reduce the risk of short circuit of the positive and negative electrodes, and at the same time allow the active ions to pass through.

[0039] 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.

[0040] 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.

[0041] As an example, the positive electrode current collector can employ a foil or a composite current collector. For example, as a 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, 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 (a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0042] 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 or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (which can also be referred to 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 as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (which can also be referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (which can also be referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (which can also be referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2), and a modified compound thereof.

[0043] In some embodiments, the positive electrode can employ a foamed metal or a foamed carbon. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or the like. When the foamed metal is employed as the positive electrode, the foamed metal surface can be provided with no positive electrode active material, or can be provided with a positive electrode active material. As an example, the foamed metal can be filled or / and deposited with a lithium source material, potassium metal, or sodium metal. The lithium source material can be lithium metal and / or a lithium-rich material.

[0044] In some embodiments, the negative electrode can be a negative electrode sheet, which can include a negative electrode current collector.

[0045] As an example, the negative electrode current collector can employ a foil, a foamed metal, or a composite current collector. For example, as the foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, titanium, or the like can be employed. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed 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).

[0046] 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.

[0047] 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.

[0048] 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, a silicon-based material, a tin-based material, lithium titanate, or the like. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, 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.

[0049] 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.

[0050] In some embodiments, the separator is a separator film. The separator film can be any known porous structure separator film having good chemical stability and mechanical stability.

[0051] As an example, the material of the separation film can include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separation film can be a single layer film or a multi-layer composite film. When the separation 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.

[0052] 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.

[0053] 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.

[0054] 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 bisoxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorodioxalate phosphate.

[0055] 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, butanedisulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether-based solvent. The ether-based 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.

[0056] Among them, the gel-state electrolyte includes a polymer as a skeleton network of the electrolyte, in combination with an ionic liquid-lithium salt.

[0057] Among them, the solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0058] As an example, the polymer solid-state electrolyte can be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, a single-ion polymer, a polyionic liquid-lithium salt, cellulose, etc.

[0059] 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 thin film), a sulfide solid-state electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorous sulfide, argyrodite), amorphous sulfide), and a halide solid-state electrolyte, a nitride solid-state electrolyte, and a hydride solid-state electrolyte.

[0060] As an example, the composite solid-state electrolyte is formed by adding an inorganic solid-state electrolyte filler to a polymer solid-state electrolyte.

[0061] 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.

[0062] In some embodiments, the electrode assembly is in a stack structure.

[0063] 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 are alternately stacked.

[0064] As an example, a plurality of positive electrode sheets can be provided, and the negative electrode sheet is folded to form a plurality of folded segments that are stacked. One positive electrode sheet is clamped between adjacent folded segments.

[0065] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded segments that are stacked.

[0066] As an example, a plurality of separators can be provided, and each of the plurality of separators is provided between any adjacent positive electrode sheet or negative electrode sheet.

[0067] As an example, the separators can be continuously provided, and the separators are provided between any adjacent positive electrode sheet or negative electrode sheet by folding or winding.

[0068] In some embodiments, the electrode assembly can have a cylindrical shape, a flat shape, or a polygonal shape.

[0069] In some embodiments, the electrode assembly can be provided with tabs. The tabs can guide current out of the electrode assembly. The tabs include positive tabs and negative tabs.

[0070] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as a polypropylene shell), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film.

[0071] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell having another shape. The prismatic battery cell includes a square battery cell, a blade-shaped battery cell, and a polygonal battery cell such as a hexagonal battery cell.

[0072] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0073] In some embodiments, the battery device can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0074] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and battery cells, and the battery cells or the battery module are accommodated in the box body.

[0075] In some embodiments, the box body can be part of the chassis structure of the vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0076] In some embodiments, the battery device can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0077] The battery device can include a battery compartment accommodating the battery cells and an electrical compartment accommodating the battery management system. In the battery device, the height of the battery compartment is limited by the space occupied by the battery cells in the height direction, and the height of the electrical compartment is limited by the space occupied by the battery management system in the height direction. However, the height of the battery management system is large, which easily causes the space waste of the electrical compartment and affects the space utilization of the battery device.

[0078] In view of this, in order to improve the space utilization of the battery device, the embodiments of the present application provide a battery device including a box body, a battery management system and battery cells. The box body has an electrical compartment and a battery compartment arranged along a first direction. The box body includes a first wall, a second wall and a third wall. Along a second direction, the second wall and the third wall are oppositely arranged with the first wall. The electrical compartment is formed between the first wall and the second wall, and the battery compartment is formed between the first wall and the third wall. The second wall is closer to the first wall than the third wall, and the second direction is perpendicular to the first direction. The battery management system is accommodated in the electrical compartment. The battery cells are accommodated in the battery compartment and electrically connected with the battery management system. The battery management system includes a box body and an electrical component. The box body has an accommodation space and an opening in communication with each other. The second wall covers the opening, and the electrical component is accommodated in the accommodation space and connected to the second wall.

[0079] In the battery device, by setting the second wall closer to the first wall than the third wall, the size of the electrical compartment along the second direction is smaller than the size of the battery compartment along the second direction, the space occupation of the electrical compartment is reduced. By setting the electrical component connected to the second wall and accommodated in the accommodation space of the box body, the box body can have a smaller size along the second direction, thereby reducing the space occupation of the battery management system along the second direction, so that a smaller distance can be provided between the second wall and the first wall, further reducing the space occupation of the electrical compartment, and improving the space utilization of the battery device. In addition, along the second direction, the side of the second wall away from the electrical compartment is closer to the region of the first wall than the third wall, which can form a redundant space, and other components can be installed in the redundant space to further reduce the space waste of the battery device and improve the space utilization of the battery device.

[0080] The technical solutions described in the embodiments of the present application are suitable for battery devices and electric devices using battery devices.

[0081] The electric device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc.

[0082] The following embodiments are described for convenience with the electric device being a vehicle as an example.

[0083] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 100 is provided for some embodiments of the present application. The vehicle 100 is internally provided with the battery device 10, which can be arranged at the bottom, head, or tail of the vehicle 100. The battery device 10 can be used for power supply of the vehicle 100, for example, the battery device 10 can be used as the operating power supply of the vehicle 100.

[0084] The vehicle 100 can further include a controller 20 and a motor 30, and the controller 20 is used to control the battery device 10 to supply power to the motor 30, for example, for the working power demand of the vehicle 100 during starting, navigation, and driving.

[0085] In some embodiments of this application, the battery device 10 can not only serve as the operating power source of the vehicle 100, but also as the driving power source of the vehicle 100, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 100.

[0086] Please refer to Figures 2-7 , Figure 2 This is a schematic diagram of the structure of the battery device 10 provided in some embodiments of this application; Figure 3 for Figure 2 AA section view; Figure 4 for Figure 3 A magnified view of a portion of region B in the middle; Figure 5 Exploded views of the battery device 10 provided in some embodiments of this application; Figure 6 Exploded view of the battery management system 2 provided in some embodiments of this application; Figure 7 This is a partial schematic diagram of a battery management system 2 provided in some embodiments of this application. Embodiments of this application provide a battery device 10, including a housing 1, a battery management system 2, and battery cells 3. The housing 1 has an electrical compartment 1a and a battery compartment 1b arranged along a first direction X. The housing 1 includes a first wall 11, a second wall 12, and a third wall 13. Along a second direction Z, the second wall 12 and the third wall 13 are both disposed opposite to the first wall 11. The electrical compartment 1a is formed between the first wall 11 and the second wall 12, and the battery compartment 1b is formed between the first wall 11 and the third wall 13. The second wall 12 is closer to the first wall 11 than the third wall 13. The second direction Z is perpendicular to the first direction X. The battery management system 2 is housed within the electrical compartment 1a. The battery cells 3 are housed within the battery compartment 1b and are electrically connected to the battery management system 2. The battery management system 2 includes a housing 21 and an electrical component 22. The housing 21 has an interconnected receiving space 212 and an opening 211. A second wall 12 covers the opening 211. The electrical component 22 is received in the receiving space 212 and connected to the second wall 12.

[0087] The enclosure 1 may include a partition wall 14, which separates the electrical compartment 1a and the battery compartment 1b. The partition wall 14 may be an expansion beam.

[0088] The battery management system 2 is electrically connected to the battery cell 3. The battery management system 2 is used to acquire parameter information of the battery cell 3 and manage the input or output of electrical energy of the battery cell 3. The parameter information of the battery cell 3 may include the temperature, voltage, etc. of the battery cell 3 in the battery device 10.

[0089] The battery management system 2 can be connected to either the first wall 11 or the second wall 12. The battery cell 3 can be connected to either the first wall 11 or the third wall 13. For example, the battery management system 2 is connected to the second wall 12, and the first wall 11 supports the battery cell 3.

[0090] The second wall 12 and the third wall 13 are located at the same side of the first wall 11 along the second direction Z, the electrical compartment la is formed between the first wall 11 and the second wall 12, so that the first wall 11 and the second wall 12 are oppositely arranged along the second direction Z; the battery compartment lb is formed between the first wall 11 and the third wall 13, so that the first wall 11 and the third wall 13 are oppositely arranged along the second direction Z. It can be understood that the surface of the second wall 12 away from the first wall 11 and the surface of the third wall 13 away from the first wall 11 are both part of the outer surface of the box 1.

[0091] The second wall 12 has a first outer surface 121 away from the first wall 11 along the second direction Z, and the first outer surface 121 is the surface of the second wall 12 farthest away from the first wall 11. Along the second direction Z, the distance between the first outer surface 121 and the first wall 11 is less than the minimum distance between the third wall 13 and the first wall 11, so that the second wall 12 is closer to the first wall 11 than the third wall 13.

[0092] The third wall 13 has a first surface 131 away from the first wall 11, and between the first outer surface 121 and the first surface 131 along the second direction Z, a redundant space is formed, which is located outside the battery device 10. The redundant space can be used to accommodate other components of the vehicle 100, for example, the redundant space can be used to install the power distribution module 40 of the vehicle 100.

[0093] The box 21 is a hollow structure with one open side, and the open side of the box 21 forms an opening 211. When the box 21 is installed on the second wall 12, the opening 211 of the box 21 is connected to the surface of the second wall 12 facing the first wall 11 and connected, realizing that the second wall 12 covers the opening 211. The box 21 and the second wall 12 can be bonded, clamped or connected by fasteners. Among them, the fastener can be a bolt.

[0094] The electrical component 22 is accommodated in the accommodation space 212, so that the electrical component 22 is integrated in the box 21. The electrical component 22 can be one or more, and the electrical component 22 can be a relay, a fuse, a current sensor, a control panel, etc. The electrical component 22 can be bonded, clamped or connected by fasteners with the second wall 12. Among them, the fastener can be a bolt.

[0095] In the embodiments of the present application, by setting the second wall 12 closer to the first wall 11 than the third wall 13, the size of the electrical compartment 1a along the second direction Z is smaller than the size of the battery compartment 1b along the second direction Z, thereby reducing the space occupation of the electrical compartment 1a. By setting the electrical component 22 connected to the second wall 12 and accommodated in the accommodation space 212 of the box body 21, the box body 21 can have a smaller size along the second direction Z, thereby reducing the space occupation of the battery management system 2 along the second direction Z, so that a smaller distance can be set between the second wall 12 and the first wall 11, further reducing the space occupation of the electrical compartment 1a and improving the space utilization of the battery device 10. In addition, along the second direction Z, the side of the second wall 12 away from the electrical compartment 1a is closer to the region of the first wall 11 than the third wall 13, which can form a redundant space, and other components can be installed in the redundant space to further reduce the space waste of the battery device 10 and improve the space utilization of the battery device 10.

[0096] In some embodiments, please continue to refer to Figures 2-5 . The third wall 13 has a first surface 131 away from the first wall 11, and the minimum distance between the second wall 12 and the first surface 131 along the second direction Z is 50-100 mm.

[0097] The second wall 12 has a first outer surface 121 away from the first wall 11, the first outer surface 121 being the surface of the second wall 12 farthest away from the first wall 11, and the distance between the first outer surface 121 and the first surface 131 along the second direction Z is the minimum distance between the second wall 12 and the first surface 131.

[0098] The minimum distance between the second wall 12 and the first surface 131 is L, which can be any one of 50 mm, 52 mm, 54 mm, 56 mm, 58 mm, 60 mm, 62 mm, 64 mm, 66 mm, 68 mm, 70 mm, 72 mm, 74 mm, 76 mm, 78 mm, 80 mm, 82 mm, 84 mm, 86 mm, 88 mm, 90 mm, 92 mm, 94 mm, 96 mm, 98 mm, 100 mm or any point value between any two of them.

[0099] In the embodiment, the minimum distance between the second wall 12 and the third wall 13 in the second direction Z is greater than or equal to 50 mm, which can make the side of the second wall 12 away from the electrical compartment 1a have a larger redundant space, facilitate the arrangement of other components, and reduce the difficulty of arranging other components; the minimum distance between the second wall 12 and the third wall 13 is less than or equal to 100 mm, which can make the electrical compartment 1a have a larger space, facilitate the arrangement of the battery management system 2 and other components, and reduce the difficulty of arranging the battery management system 2; therefore, the minimum distance between the second wall 12 and the third wall 13 is 50 mm-100 mm, which can reduce the difficulty of arranging components on both sides of the second wall 12 and improve the space utilization of the battery device 10.

[0100] In some embodiments, please continue to refer to Figure 6 and Figure 7 . The battery management system 2 further includes a connection terminal 23 and a conductive wire harness 24. The connection terminal 23 is electrically connected with the electrical component 22. The conductive wire harness 24 is connected with the connection terminal 23, and the conductive wire harness 24 is at least partially embedded in the wall portion of the box body 21.

[0101] The connection terminal 23 can be directly connected with the electrical component 22 to achieve electrical connection between the connection terminal 23 and the electrical component 22; or the connection terminal 23 can be connected with the electrical component 22 through a wire to achieve electrical connection between the connection terminal 23 and the electrical component 22.

[0102] The conductive wire harness 24 can be connected with multiple connection terminals 23, and the multiple connection terminals 23 are connected with multiple electrical components 22 to achieve electrical connection of the multiple electrical components 22 in the box body 21. The battery management system 2 can further include an external connector. The conductive wire harness 24 can be connected with the connection terminal 23 and the external connector, and the connection terminal 23 is connected with the electrical component 22 to achieve electrical connection between the electrical component 22 and the external connector. The external connector can be connected with external devices outside the battery device 10 or other electrical components in the battery device 10.

[0103] The conductive wire harness 24 can be entirely embedded in the wall portion of the box body 21; or only a part of the conductive wire harness 24 can be embedded in the wall portion of the box body 21, and the other part can be located outside the box body 21 or in the accommodation space 212.

[0104] In the embodiment, by embedding at least part of the conductive wire harness 24 in the wall portion of the box body 21, the box body 21 and the conductive wire harness 24 can share a part of the height space, which can facilitate reducing the size of the box body 21 in the second direction Z, so that a smaller distance between the second wall 12 and the first wall 11 can be arranged, which can facilitate reducing the space occupation of the electrical compartment 1a and improving the space utilization of the battery device 10.

[0105] In some embodiments, please continue to refer to Figure 6And Figure 7 The electrical component 22 includes a relay 221, the relay 221 is electrically connected with the connection terminal 23, at least one of the size of the relay 221 along the first direction X and the size of the relay 221 along the third direction Y is greater than the size of the relay 221 along the second direction Z, the first direction X, the second direction Z and the third direction Y are perpendicular to each other.

[0106] The relay 221 is electrically connected with the connection terminal 23, so that the relay 221 can be electrically connected with the control panel, the output pole of the battery device 10 and other components through the connection terminal 23 and the conductive wire harness 24.

[0107] The size of the relay 221 along the first direction X and the size of the relay 221 along the third direction Y can both be greater than the size of the relay 221 along the second direction Z; or the size of the relay 221 along the first direction X can be greater than the size of the relay 221 along the second direction Z, and the size of the relay 221 along the third direction Y can be less than the size of the relay 221 along the second direction Z; or the size of the relay 221 along the third direction Y can be greater than the size of the relay 221 along the second direction Z, and the size of the relay 221 along the first direction X can be less than the size of the relay 221 along the second direction Z.

[0108] In the embodiment, the size of the relay 221 along the second direction Z can be reduced, the influence of the relay 221 on the size of the box body 21 along the second direction Z is reduced, which is beneficial to further reduce the size of the box body 21 along the second direction Z, further reduce the space occupation of the electrical compartment la, and improve the space utilization of the battery device 10.

[0109] In some embodiments, the relay 221 can include a coil and a triggering mechanism, energization or de-energization of the coil can drive the triggering mechanism to act, so as to realize the connection or disconnection of the output circuit of the battery device 10. Wherein, the relay 221 can be a structure without a shell, the coil is exposed in the box body 21, the box body 21 fixes the position of the coil, and the coil is insulated and isolated from the outside of the box body 21.

[0110] In some embodiments, please refer to Figure 8 , Figure 8 An exploded view of the battery device 10 provided in some other embodiments of the present application is shown. The battery management system 2 is arranged on the second wall 12. The first wall 11 is provided with an access opening 111, the access opening 111 is in communication with the electrical compartment la. The box body 1 further includes an access cover 15, the access cover 15 is arranged on the access opening 111 and is detachably connected with the first wall 11.

[0111] The battery management system 2 on the second wall 12 can be maintained through the access opening 111 on the first wall 11. When the battery device 10 is normally used, the access cover 15 is arranged on the access opening 111 to close the access opening 111, so as to reduce the risk of foreign matter entering the electrical compartment la.

[0112] The number of the access openings 111 can be one or multiple. In the embodiment where the access openings 111 are multiple, one access cover 15 can be provided for each access opening 111, and one access cover 15 can be provided for multiple access openings 111.

[0113] The access cover 15 can be connected with the first wall 11 by clamping, pinning, or fastener, so as to achieve detachable connection between the access cover 15 and the first wall 11. The fastener can be a bolt.

[0114] In the embodiment, the battery management system 2 is arranged on the second wall 12, and the battery management system 2 on the second wall 12 can be directly accessed through the access opening 111 of the first wall 11, thereby reducing the maintenance difficulty of the battery management system 2. The access cover 15 is arranged in detachable connection with the first wall 11, and when the components in the electrical compartment la are accessed, the components in the electrical compartment la can be accessed only by removing the access cover 15, thereby reducing the maintenance difficulty of the electrical compartment la. When the battery device 10 is installed at the bottom of the vehicle 100, the first wall 11 can be the bottom wall of the battery device 10. Compared with removing the entire battery device 10 to access the battery device 10, the access cover 15 is removed to access the battery management system 2, thereby simplifying the maintenance steps and reducing the access difficulty.

[0115] In some embodiments, please continue to refer to Figure 8 The box 1 includes a frame 16, and the first wall 11, the second wall 12, and the third wall 13 are connected to the frame 16. The first wall 11 includes a first part 112 and a second part 113, the electrical compartment la is formed between the first part 112 and the second wall 12, the battery compartment lb is formed between the second part 113 and the third wall 13, and the access opening 111 is arranged on the first part 112. The first part 112 is detachably connected to the frame 16.

[0116] The frame 16 surrounds the outer periphery of the electrical compartment la and the battery compartment lb. In the embodiment where the battery device 10 includes the partition wall 14, the frame 16 can include the partition wall 14.

[0117] The second wall 12 can be welded, bonded, clamped, or fastened to the frame 16. For example, the second wall 12 is connected to the frame 16 by friction welding.

[0118] The third wall 13 can be welded, bonded, clamped, or fastened to the frame 16. For example, the third wall 13 is connected to the frame 16 by bolt locking.

[0119] In a projection plane perpendicular to the second direction Z, the front projection of the first part 112 covers the electrical compartment 1a, and the front projection of the second part 113 covers the battery compartment 1b. The first part 112 and the second part 113 can be directly connected; or can be connected through an intermediate part, for example, the first part 112 and the second part 113 are connected through a transition part, and the transition part and the partition wall 14 are stacked along the second direction Z.

[0120] The first part 112 and the second part 113 can be integrally formed, or can be separately arranged and connected. In the embodiment in which the first part 112 and the second part 113 are integrally formed, the first part 112 and the second part 113 are both detachably connected with the frame 16. In the embodiment in which the first part 112 and the second part 113 are separately arranged and connected, the first part 112 is detachably connected with the second part 113.

[0121] The first part 112 can be snap-connected, pinned, or fastened with the frame 16. The fastener can be a bolt.

[0122] In the present embodiment, by arranging the first part 112 to be detachably connected with the frame 16, the components in the electrical compartment 1a can be replaced by removing the first part 112, which is conducive to reducing the maintenance difficulty of the electrical compartment 1a.

[0123] In some embodiments, a sealing gasket is arranged between the third wall 13 and the frame 16, and the sealing gasket is used to seal the connection position of the third wall 13 and the frame 16 to achieve the sealing of the battery compartment 1b.

[0124] In some embodiments, the second part 113 is detachably connected with the frame 16.

[0125] The second part 113 can be snap-connected, pinned, or fastened with the frame 16. The fastener can be a bolt.

[0126] In the present embodiment, by arranging the second part 113 to be detachably connected with the frame 16, the battery compartment 1b can be overhauled and maintained by removing the second part 113, which is conducive to reducing the maintenance difficulty of the battery compartment 1b.

[0127] In some embodiments, please continue to refer to Figure 8 The box body 1 further comprises a bottom guard plate 17, the bottom guard plate 17 is connected to the first wall 11 and located on the side of the first wall 11 away from the second wall 12, and the projection of the bottom guard plate 17 along the second direction Z covers at least part of the electrical compartment 1a.

[0128] The bottom guard plate 17 is snap-connected, pinned, or fastened with the first wall 11. The fastener can be a bolt.

[0129] In the projection plane perpendicular to the second direction Z, the orthographic projection of the bottom guard plate 17 can cover all of the electrical compartment 1a; or the orthographic projection of the bottom guard plate 17 can cover part of the electrical compartment 1a. The orthographic projection of the bottom guard plate 17 can cover only at least part of the electrical compartment 1a; or the orthographic projection of the bottom guard plate 17 can cover at least part of the electrical compartment 1a and at least part of the battery compartment 1b.

[0130] In the embodiment, the bottom guard plate 17 can improve the strength of the first wall 11, reduce the risk of damage to the first wall 11 and cause partial damage in the electrical compartment 1a, and improve the reliability of the battery device 10.

[0131] In some embodiments, please continue to refer to Figure 8 . The projection of the bottom guard plate 17 along the second direction Z completely covers the electrical compartment 1a.

[0132] In the projection plane of the second direction Z, the orthographic projection of the bottom guard plate 17 can cover only the electrical compartment 1a; or the orthographic projection of the bottom guard plate 17 can cover at least part of the battery compartment 1b and the electrical compartment 1a.

[0133] In the embodiment, the risk of damage to the components in the electrical compartment 1a by external force can be further reduced, and the reliability of the battery device 10 is improved.

[0134] The embodiments of the application provide a vehicle 100, which comprises the battery device 10 provided in any one of the above embodiments.

[0135] In some embodiments, please refer to Figure 9 , Figure 9 is a structural schematic view of the vehicle 100 provided in some other embodiments of the application. The vehicle 100 further comprises a power distribution module 40, which is arranged on the surface of the second wall 12 away from the first wall 11 along the second direction Z, and the power distribution module 40 is electrically connected with the battery device 10.

[0136] The power distribution module 40 and the battery management system 2 can be arranged on the second wall 12. The electrical components in the electrical compartment 1a and the power distribution module 40 share the second wall 12, so as to save the installation position.

[0137] The power distribution module 40 can be connected with the first wall 11 through clamping, pin connection or fastener. The fastener can be a bolt.

[0138] In the embodiment, by arranging the power distribution module 40 on the surface of the second wall 12 away from the first wall 11 in the second direction Z, on the one hand, the space utilization of the battery device 10 can be improved, the waste of space of the battery device 10 can be reduced, and the layout structure of the vehicle 100 is optimized. On the other hand, the power distribution module 40 and the battery device 10 are relatively close, the path of the connecting wire harness between the power distribution module 40 and the battery device 10 can be shortened, the energy consumption can be reduced, and the electromagnetic interference of the power distribution module 40 on other components of the vehicle 100 can also be reduced.

[0139] In some embodiments, please continue to refer to Figure 9 . The third wall 13 has a first surface 131 away from the first wall 11, and the power distribution module 40 does not protrude from the first surface 131 in the direction of the first wall 11 pointing to the second wall 12.

[0140] The surface of the second wall 12 away from the electrical compartment 1a is a first outer surface 121, and a redundant space is formed between the first surface 131 and the first outer surface 121 in the second direction Z, and the power distribution module 40 is accommodated in the redundant space.

[0141] In the embodiment, the power distribution module 40 does not protrude from the first surface 131, which can reduce the risk of interference between the power distribution module 40 and other components of the vehicle 100, and improve the structural stability of the power distribution module 40.

[0142] Please refer to Figures 2-8The embodiment of the application provides a battery device 10, which comprises a box body 1, a battery management system 2 and a battery monomer 3. The box body 1 has an electrical compartment 1a and a battery compartment 1b arranged along a first direction X. The battery management system 2 is contained in the electrical compartment 1a, and the battery management system 2 comprises a box 21, an electrical component 22, a connecting terminal 23 and a conductive wire harness 24. The box 21 has a containing space 212. The electrical component 22 is contained in the containing space 212. The connecting terminal 23 is electrically connected with the electrical component 22. The conductive wire harness 24 is connected with the connecting terminal 23, and the conductive wire harness 24 is at least partially embedded in a wall portion of the box 21. The battery monomer 3 is contained in the battery compartment 1b and is electrically connected with the battery management system 2. The box 1 comprises a first wall 11, a second wall 12 and a third wall 13, the second wall 12 and the third wall 13 are oppositely arranged with the first wall 11 along a second direction Z, the electrical compartment 1a is formed between the first wall 11 and the second wall 12, the battery compartment 1b is formed between the first wall 11 and the third wall 13, the second wall 12 is closer to the first wall 11 than the third wall 13, the third wall 13 has a first surface 131 away from the first wall 11, the minimum distance between the second wall 12 and the first surface 131 along the second direction Z is 50mm-100mm, the electrical component 22 comprises a relay 221, the relay 221 is electrically connected with the connecting terminal 23, at least one of the size of the relay 221 along the first direction X and the size of the relay 221 along a third direction Y is greater than the size of the relay 221 along the second direction Z, and the first direction X, the second direction Z and the third direction Y are perpendicular to each other. The battery management system 2 is arranged on the second wall 12. The first wall 11 is provided with an access opening 111, and the access opening 111 is communicated with the electrical compartment 1a. The box 1 further comprises an access cover 15, the access cover 15 is arranged on the access opening 111 and is detachably connected with the first wall 11. The box 1 further comprises a bottom guard plate 17, the bottom guard plate 17 is connected with the first wall 11 and is located on the side of the first wall 11 away from the second wall 12, and a projection of the bottom guard plate 17 along the second direction Z covers at least a part of the electrical compartment 1a.

[0143] In the battery device 10, by arranging the second wall 12 to be closer to the first wall 11 than the third wall 13 along the second direction Z, the size of the electrical compartment la along the second direction Z is smaller than the size of the battery compartment lb along the second direction Z, the influence of the size of the battery cell 3 on the size of the electrical compartment la can be reduced, the space occupation of the electrical compartment la can be reduced, and the space utilization of the electrical compartment la can be improved, thereby improving the space utilization of the battery device 10. In addition, along the second direction Z, the side of the second wall 12 away from the electrical compartment la is closer to the first wall 11 than the third wall 13, which can form a redundant space, and other components can be installed in the redundant space to further reduce the space waste of the battery device 10 and improve the space utilization of the battery device 10. By embedding at least part of the conductive wire harness 24 in the wall of the box body 21, the box body 21 and the conductive wire harness 24 can share a part of the height space, which is conducive to reducing the size of the box body 21 along the second direction Z, so that a smaller distance can be arranged between the second wall 12 and the first wall 11, which is conducive to reducing the space occupation of the electrical compartment la and improving the space utilization of the battery device 10. The size of the relay 221 along the second direction Z is small, which reduces the influence of the relay 221 on the size of the box body 21 along the second direction Z, which is conducive to further reducing the size of the box body 21 along the second direction Z, further reducing the space occupation of the electrical compartment la, and improving the space utilization of the battery device 10. When the battery device 10 is installed at the bottom of the vehicle 100, the first wall 11 can be the bottom wall of the battery device 10. In this way, compared with disassembling the entire battery device 10 for maintenance, disassembling the maintenance cover 15 for maintenance of the battery management system 2 simplifies the maintenance steps and reduces the difficulty of maintenance. The bottom guard plate 17 can improve the strength of the first wall 11, reduce the risk of damage to the first wall 11 and cause partial damage in the electrical compartment la, and improve the reliability of the battery device 10.

[0144] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0145] The above embodiments are only used to illustrate the technical solutions of the present application and are 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 principles of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, include: The enclosure has an electrical compartment and a battery compartment arranged along a first direction. The enclosure includes a first wall, a second wall, and a third wall. Along a second direction, the second wall and the third wall are both disposed opposite to the first wall. The electrical compartment is formed between the first wall and the second wall, and the battery compartment is formed between the first wall and the third wall. The second wall is closer to the first wall than the third wall. The second direction is perpendicular to the first direction. A battery management system is housed within the electrical compartment; The battery cell is housed within the battery compartment and is electrically connected to the battery management system; The battery management system includes a housing and electrical components. The housing has interconnected receiving spaces and openings. A second wall covers the openings. The electrical components are housed within the receiving spaces and connected to the second wall. The battery management system also includes: Connecting terminals are used for electrical connection to the electrical components; A conductive wire harness is connected to the connection terminal, and the conductive wire harness is at least partially embedded in the wall of the housing. The electrical component includes a relay, which is electrically connected to the connection terminal. At least one of the dimensions of the relay along the first direction and the third direction is greater than the dimension of the relay along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery device as claimed in claim 1, characterized in that, The third wall has a first surface facing away from the first wall, and the minimum distance between the second wall and the first surface along the second direction is 50mm-100mm.

3. The battery device as described in claim 1 or 2, characterized in that, The first wall is provided with an access port, which is connected to the electrical compartment; The enclosure also includes an inspection cover, which is placed over the inspection port and is detachably connected to the first wall.

4. The battery device as claimed in claim 3, characterized in that, The enclosure includes a frame, and the first wall, the second wall, and the third wall are all connected to the frame; the first wall includes a first part and a second part, the electrical compartment is formed between the first part and the second wall, the battery compartment is formed between the second part and the third wall, and the access port is provided in the first part; The first part is detachably connected to the frame, and / or the second part is detachably connected to the frame.

5. The battery device as claimed in claim 1 or 2, characterized in that, The enclosure also includes a bottom protective plate, which is connected to the first wall and located on the side of the first wall opposite to the second wall. The projection of the bottom protective plate along the second direction covers at least a portion of the electrical compartment.

6. The battery device as claimed in claim 5, characterized in that, The projection of the bottom guard plate along the second direction completely covers the electrical compartment.

7. An electrical device, characterized in that, Includes the battery device as described in any one of claims 1-6.

8. The electrical appliance as described in claim 7, characterized in that, The electrical device further includes a power distribution module, which is disposed on the surface of the second wall away from the first wall along the second direction, and the power distribution module is electrically connected to the battery device.

9. The electrical appliance as described in claim 8, characterized in that, The third wall has a first surface that is opposite to the first wall and points in a direction from the first wall toward the second wall, and the power distribution module does not protrude from the first surface.

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