Battery apparatus, electrical device and energy storage apparatus

Abstract

The present disclosure relates to the technical field of batteries. Provided are a battery apparatus, an electrical device and an energy storage apparatus. The battery apparatus comprises a battery box, a battery cell assembly, a support beam and an adhesive blocking member. The battery box comprises a bottom plate and a box cover, the bottom plate being used for holding the battery cell assembly, the box cover being connected to the bottom plate to define an accommodating space, and the battery cell assembly being arranged in the accommodating space; an adhesive layer connects the battery cell assembly to the bottom plate. The support beam is provided in the accommodating space, the support beam being provided on the bottom plate and located on the peripheral side of the battery cell assembly. The adhesive blocking member comprises an adhesive blocking wall and a bottom wall, the adhesive blocking wall being connected to the bottom wall, and the support beam, the adhesive blocking wall and the bottom plate together enclosing to define a placement recess; the battery cell assembly is provided in the placement recess, and the bottom wall is bonded to the battery cell assembly by means of the adhesive layer.

Description

A battery device, an electrical device, and an energy storage device

[0001] Cross-reference to related applications

[0002] This disclosure is based on and claims priority to Chinese Patent Application No. 202422712103.2, filed on November 7, 2024, entitled “A Battery Device, Electrical Equipment and Energy Storage Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of battery technology, and more particularly to a battery device, electrical equipment, and energy storage device. Background Technology

[0004] Battery devices can be used to store or provide electrical energy. They can be used in electrical equipment, such as vehicles or energy storage devices.

[0005] In related technologies, the battery device includes a battery box and battery cell components disposed inside the battery box. The battery cell components are bonded to the bottom plate of the battery box with adhesive. During the assembly process of the battery cell components into the box, the battery cell components are squeezed downwards to release the liquid adhesive, causing the adhesive to overflow around the battery cell components. The overflowing adhesive can easily contaminate other parts of the battery box and is difficult to clean. Summary of the Invention

[0006] In view of this, embodiments of the present disclosure aim to provide a battery device, an electrical device, and an energy storage device, wherein the support beam and the adhesive barrier can jointly block the liquid adhesive layer.

[0007] To achieve the above objectives, the technical solution of this disclosure embodiment is implemented as follows:

[0008] This disclosure provides a battery device, including:

[0009] Battery cell assembly;

[0010] The battery box includes a base plate and a cover. The base plate supports the individual battery cells, and the cover is connected to the base plate to define an accommodating space in which the individual battery cells are located. An adhesive layer connects the individual battery cells and the base plate.

[0011] A support beam, disposed within the accommodating space, is mounted on the base plate and located around the periphery of the battery cell assembly; and

[0012] The adhesive baffle includes an adhesive baffle wall and a bottom wall. The adhesive baffle wall is connected to the bottom wall. The support beam, the adhesive baffle wall and the bottom plate together form a placement groove. The battery cell assembly is placed in the placement groove. The bottom wall is bonded to the battery cell assembly through an adhesive layer.

[0013] The battery device provided in this disclosure improves the connection stability of the sealant by bonding the bottom wall to the battery cell assembly via an adhesive layer, and also enhances the sealant's sealant reliability. During the assembly of the battery cell assembly into the placement tank, the liquid adhesive layer is squeezed by the battery cell assembly and the bottom plate, flowing towards the periphery of the battery cell assembly. The support beam and sealant wall surround the outer periphery of the battery cell assembly, and together they block the liquid adhesive layer, preventing it from flowing further outside the placement tank to a certain extent. Thus, by adding a sealant and reusing the support beam to block the liquid adhesive layer, the bottom plate no longer needs a closed-loop frame for sealant sealing, reducing costs and manufacturing complexity.

[0014] In some embodiments, the battery cell assembly is disposed on a first side of the base plate along a first direction, with a plane perpendicular to the first direction as the projection plane, and the projections of the battery cell assembly, the adhesive layer, and the bottom wall partially overlap.

[0015] In this embodiment, part of the adhesive layer is sandwiched between the battery cell assembly and the bottom wall. During the assembly of the battery cell assembly into the placement slot, the force applied by the battery cell assembly can be transmitted to the bottom wall, which can press the bottom wall tightly against the base plate, further reducing the risk of displacement of the adhesive baffle during assembly.

[0016] In some embodiments, the battery cell assembly is disposed on a first side of the base plate along a first direction, and the adhesive baffle includes a connecting wall connected to one end of the adhesive baffle along a second direction, and the connecting wall is bent toward the side where the battery cell assembly is located. The connecting wall is connected to the support beam, and the first direction is perpendicular to the second direction.

[0017] In this embodiment, the connecting wall is connected to the support beam, and the end of the adhesive-blocking wall along the second direction is fixed, reducing the risk of the adhesive-blocking component being deformed and displaced by the overflowing adhesive, and further improving the connection stability of the adhesive-blocking component.

[0018] In some embodiments, the connecting wall is bonded to the support beam and / or connected by fasteners.

[0019] In this embodiment, the connecting wall is bonded to the support beam and / or connected by fasteners, which is a simple and convenient connection method.

[0020] In some embodiments, the battery cell assembly is disposed on a first side of the base plate along a first direction, and the adhesive barrier includes an end portion and a main body portion. The end portion is connected to the main body portion and the connecting wall, and the end portion is connected to the end face of the support beam facing a third direction. The first direction and the third direction are perpendicular to each other.

[0021] In this embodiment, the end is connected to the third-direction end face of the support beam. This not only strengthens the connection stability of the adhesive baffle, but also reduces the chance of adhesive getting trapped in the gap between the end and the support beam to a certain extent.

[0022] In some embodiments, the main body portion protrudes towards the first side at the end.

[0023] In this embodiment, the main body is mainly used to block the adhesive layer from overflowing. The main body protrudes to the first side, and the size of the main body along the first direction is larger than the size of the end along the first direction. The overflowing adhesive needs to climb to a higher height to cross the main body and spread outside the placement groove, which can improve the reliability of the adhesive blocking.

[0024] In some embodiments, the adhesive barrier is spaced apart from the side of the battery cell assembly to form an adhesive-containing space.

[0025] In this embodiment, the adhesive barrier wall and the side of the battery cell assembly are spaced apart to form an adhesive-containing space. During the assembly of the battery cell assembly into the placement slot, the adhesive overflowing from the adhesive layer can enter the adhesive-containing space, reducing the squeezing force of the adhesive on the adhesive barrier wall.

[0026] In some embodiments, the end of the adhesive barrier away from the bottom wall is connected to the battery cell assembly.

[0027] In this embodiment, the end of the sealant wall away from the bottom wall is connected to the battery cell assembly, which can not only further enhance the connection stability of the sealant, but also prevent the box cover from pressing on the sealant wall during the assembly of the box cover and the bottom plate.

[0028] In some embodiments, the surface of the bottom wall away from the adhesive barrier is bonded to the base plate.

[0029] In this embodiment, the adhesive baffle can be fixed to the base plate. The adhesive baffle is easy to assemble and operate, reducing the risk of the adhesive baffle moving under force.

[0030] In some embodiments, the battery cell assembly is connected to a support beam; and / or,

[0031] The adhesive barrier is a flexible structure; and / or,

[0032] The rubber-blocking component is an insulating structure.

[0033] In this embodiment, both the base plate and the support beam provide fixation for the battery cell assembly, preventing displacement due to impacts or other forces. The adhesive baffle is a flexible structure. Thus, the baffle can undergo elastic deformation under the pressure of adhesive overflowing from the adhesive layer. This elastic deformation not only increases the space to accommodate the adhesive but also prevents excessive reaction forces from causing the adhesive to flow to other locations. The adhesive baffle is also an insulating structure, improving the reliability and safety of the battery device.

[0034] In some embodiments, a battery cell assembly is disposed on a first side of the base plate along a first direction. The battery cell assembly includes a cell unit, and the cell unit includes at least two battery cells stacked along a second direction. The second direction is perpendicular to the surface with the largest area in the battery cell. Two support beams are disposed on both sides of the cell unit along the second direction. Two adhesive baffles are spaced apart along a third direction. Each adhesive baffle is connected to the two support beams at both ends along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0035] In this embodiment, two support beams and two adhesive baffles are sequentially connected to form a closed-loop structure. The two support beams not only provide stable support for the battery cell assembly, preventing displacement caused by unstable battery cell assembly, but also provide fixed positions for the two adhesive baffles, ensuring that both ends of the two adhesive baffles along the second direction are effectively fixed and preventing displacement of the adhesive baffles.

[0036] This disclosure also provides an electrical device including any of the above-described battery devices, the battery devices being used to store or provide electrical energy.

[0037] The electrical equipment provided in this disclosure includes the battery device provided in this disclosure, and has the same or corresponding beneficial effects as the battery device.

[0038] This disclosure also provides an energy storage device, including any of the above-described battery devices, the battery devices being used to store or provide electrical energy.

[0039] The energy storage device provided in this disclosure includes the battery device provided in this disclosure, and has the same or corresponding beneficial effects as the battery device. Attached Figure Description

[0040] Figure 1 is a schematic diagram of the vehicle structure in an embodiment of this disclosure;

[0041] Figure 2 is a schematic diagram of the structure of the battery device in an embodiment of this disclosure;

[0042] Figure 3 is a schematic diagram of a part of the structure of the battery device shown in Figure 2, where the box cover is not shown;

[0043] Figure 4 is an exploded schematic diagram of the structure shown in Figure 3;

[0044] Figure 5 is a schematic diagram of the structure shown in Figure 3 from another perspective;

[0045] Figure 6 is a schematic cross-sectional view along the AA direction in Figure 5;

[0046] Figure 7 is an enlarged view of point B in Figure 6;

[0047] Figure 8 is a structural schematic diagram of the first type of adhesive-blocking component in the embodiments of this disclosure;

[0048] Figure 9 is an enlarged view of point C in Figure 8;

[0049] Figure 10 is a schematic diagram of the assembly of the base plate, the first type of adhesive baffle and the support beam in an embodiment of this disclosure;

[0050] Figure 11 is an enlarged view of point D in Figure 10;

[0051] Figure 12 is a structural schematic diagram of the second type of adhesive-blocking component in the embodiments of this disclosure;

[0052] Figure 13 is an enlarged view of point E in Figure 12;

[0053] Figure 14 is a partially enlarged schematic diagram of the base plate, the second type of adhesive baffle, and the support beam in an embodiment of this disclosure;

[0054] Figure 15 is another cross-sectional schematic diagram of a battery device structure according to an embodiment of the present disclosure, wherein the folded part of the adhesive-blocking wall is connected to the battery cell assembly.

[0055] Figure 16 is a schematic diagram of the structure of an energy storage device in some embodiments of this disclosure. Detailed Implementation

[0056] The embodiments of the technical solutions disclosed herein will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solutions disclosed herein and are therefore intended to limit the scope of protection of this disclosure.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure.

[0058] In the description of the embodiments disclosed herein, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this disclosure. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] It should be noted that in this disclosure, "at least two" refers to a quantity of two or more. "Multiple" refers to a quantity of two or more. The first direction, the second direction, and the third direction are perpendicular to each other. The first direction is denoted as X, the second direction as Y, and the third direction as Z. The first side and the second side are two sides opposite to the first direction. The first side is denoted as X1, and the second side as X2. "Above" refers to the direction towards the sky, and "below" is the opposite of "above," referring to the direction towards the ground.

[0061] Please refer to Figures 1 to 3. To facilitate understanding of the battery cell 22, battery device 100, and electrical equipment provided in the embodiments of this disclosure, some basic structures of the battery cell 22, battery device 100, and electrical equipment provided in the embodiments of this disclosure will be introduced first.

[0062] In this embodiment of the disclosure, the battery cell 22 can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0063] The battery cell 22 can be a lithium-ion battery cell, sodium-ion battery cell, sodium-lithium-ion battery cell, lithium metal battery cell, sodium metal battery cell, lithium-sulfur battery cell, magnesium-ion battery cell, nickel-metal hydride battery cell, nickel-cadmium battery cell, or lead-acid battery cell, etc., and this embodiment does not limit it.

[0064] A single battery cell 22 typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the single battery cell 22, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits between them while allowing active ions to pass through.

[0065] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0066] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0067] As an example, the positive current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0068] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this disclosure is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, 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, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM) 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM) 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM) 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM) 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM) 811 ), lithium nickel cobalt aluminum oxide (such as LiNi) 0.8 Co 0.15 Al 0.05At least one of O2 and its modified compounds. Modified compounds refer to substances obtained by modification methods such as doping or coating based on the above-mentioned substances.

[0069] In some embodiments, the negative electrode can be a negative electrode sheet, which may include a negative electrode current collector.

[0070] As an example, the negative electrode current collector can be a metal foil, a conductive polymer material, a carbon material, or a composite current collector. For example, as a metal foil, pure metals, alloys, or surface-treated metals can be used, including but not limited to stainless steel, copper, aluminum, nickel, titanium, or silver. The composite current collector may include a polymer material substrate and a metal layer. The composite current collector can be formed by forming a metal material (copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0071] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0072] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0073] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cell 22. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this disclosure is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cell 22 may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0074] In some embodiments, the negative electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. When foamed metal is used as the negative electrode sheet, the surface of the foamed metal may or may not have a negative electrode active material.

[0075] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0076] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0077] In some embodiments, the separator is a separator membrane. This disclosure does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0078] As an example, the main material of the separator can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator can be a single-layer film or a multi-layer composite film, without particular limitation. When the separator is a multi-layer composite film, the materials of each layer can be the same or different, without particular limitation. The separator can be a single component located between the positive and negative electrodes, or it can be attached to the surfaces of the positive and negative electrodes. An inorganic particle coating, an organic particle coating, or an organic / inorganic composite coating can also be applied to the surface of the separator.

[0079] In some embodiments, the battery cell 22 further includes an electrolyte disposed within the casing of the battery cell 22. The electrolyte serves to conduct active ions between the positive and negative electrodes. This disclosure does not impose specific limitations on the type of electrolyte, which can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0080] Liquid electrolytes include electrolyte salts and solvents.

[0081] In some embodiments, the electrolyte salt may be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0082] In some embodiments, the solvent may be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may 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 ethers.

[0083] In some embodiments, the electrolyte may optionally include additives. For example, additives may include negative electrode film-forming additives, positive electrode film-forming additives, and additives that can improve certain properties of the battery cell 22, such as additives that improve the overcharge / fast charge performance of the battery cell 22, additives that improve the high-temperature performance of the battery cell 22, additives that improve the low-temperature performance of the battery cell 22, etc.

[0084] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0085] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0086] As an example, the polymers of polymeric solid electrolytes may include polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0087] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphorus sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0088] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0089] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0090] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0091] In some implementations, the electrode assembly is a stacked structure.

[0092] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0093] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0094] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0095] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0096] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0097] In some implementations, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0098] In some implementations, the electrode assembly has tabs that allow current to be drawn out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0099] In some embodiments, the battery cell 22 may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. As an example, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0100] As an example, the battery cell 22 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This disclosure does not impose any particular limitations.

[0101] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0102] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0103] In some embodiments, a pressure relief mechanism is provided on the casing. The pressure relief mechanism is used to release the internal gas of the battery cell 22.

[0104] As an example, the internal pressure or temperature of the battery cell 22 is actuated to release the internal pressure or temperature when it reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 22 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby forming an opening or channel for the internal pressure or temperature to be released. The threshold design varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 22.

[0105] In some embodiments, as shown in Figures 3 and 4, the battery cell assembly 2 is typically formed by arranging multiple battery cells 22.

[0106] Please refer to Figures 3 and 4. The battery device 100 mentioned in the embodiments of this disclosure may include one or more battery cell assemblies 2 for providing voltage and capacity.

[0107] As an example, the battery cell assembly 2 can be a battery module, which is formed by arranging and fixing multiple battery cells 22 together. As an example, the battery module can be formed by bundling multiple battery cells 22 together with cable ties.

[0108] This disclosure provides an electrical device including a battery device 100 as described in any embodiment of this disclosure, the battery device 100 being used to store or provide electrical energy.

[0109] Electrical equipment includes, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, vehicles, ships, or spacecraft. Vehicles can include electric vehicles and electric cars, electric toys can include electric vehicles and electric cars, and so on. Fixed or mobile electric toys include, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft.

[0110] Please refer to Figure 16. This disclosure provides an energy storage device, including a battery device 100 as described in any embodiment of this disclosure. The battery device 100 is used to store or provide electrical energy.

[0111] Please refer to Figure 16. The energy storage device may also include a cabinet 210, and the battery device 100 is disposed inside the cabinet 210.

[0112] Energy storage devices include, but are not limited to, energy storage containers or energy storage cabinets.

[0113] In the following embodiments, for ease of explanation, a vehicle 1000 is used as an example of an electrical device according to an embodiment of this disclosure. The description is as follows, in conjunction with the accompanying drawings.

[0114] Figure 1 is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this disclosure. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. As shown in Figure 1, a battery device 100 is disposed inside the vehicle 1000. The battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power requirements of the vehicle 1000 during starting, navigation, and driving.

[0115] In some embodiments of this disclosure, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0116] In related technologies, to limit adhesive overflow during the assembly of battery cells, a closed-loop frame is installed on the upper surface of the base plate. The frame, made of metal profile, surrounds the outer perimeter of the battery cell's support beam. Adhesive is applied to the upper surface of the base plate within the space enclosed by the frame. During battery cell assembly, the frame prevents adhesive from overflowing outside the frame. Once the adhesive has solidified, the battery cell is then fixed to the support beam. However, adding this closed-loop frame presents challenges such as high cost and complex manufacturing processes.

[0117] In view of the above, this disclosure provides a battery device, which includes a battery box, a battery cell assembly, a support beam, and a sealant. The battery box includes a base plate and a cover. The base plate supports the battery cell assembly, and the cover is connected to the base plate to define an accommodating space, within which the battery cell assembly is located. An adhesive layer connects the battery cell assembly and the base plate. The support beam is disposed within the accommodating space, on the base plate, and located around the periphery of the battery cell assembly. The sealant includes a sealant wall and a bottom wall, the sealant wall being connected to the bottom wall. The support beam, the sealant wall, and the base plate together form a placement groove, in which the battery cell assembly is placed. The bottom wall is bonded to the battery cell assembly via the adhesive layer.

[0118] The battery device provided in this disclosure improves the connection stability of the sealant by bonding the bottom wall to the battery cell assembly via an adhesive layer, and also enhances the sealant's sealant reliability. During the assembly of the battery cell assembly into the placement tank, the liquid adhesive layer is squeezed by the battery cell assembly and the bottom plate, flowing towards the periphery of the battery cell assembly. The support beam and sealant wall surround the outer periphery of the battery cell assembly, and together they block the liquid adhesive layer, preventing it from flowing further outside the placement tank to a certain extent. Thus, by adding a sealant and reusing the support beam to block the liquid adhesive layer, the bottom plate no longer needs a closed-loop frame for sealant sealing, reducing costs and manufacturing complexity.

[0119] The battery device 100 provided in this disclosure is further described below with reference to the accompanying drawings. Referring to Figures 2 to 10, the battery device 100 includes a battery box 1, a battery cell assembly 2, a support beam 12, and a sealant 13. The battery box 1 includes a base plate 11 and a cover 15. The base plate 11 supports the battery cell assembly 2, and the cover 15 is connected to the base plate 11 to define an accommodating space, in which the battery cell assembly 2 is located. An adhesive layer 14 connects the battery cell assembly 2 and the base plate 11. The support beam 12 is disposed within the accommodating space, on the base plate 11, and located around the periphery of the battery cell assembly 2. The sealant 13 includes a sealant wall 131 and a bottom wall 132. The sealant wall 131 is connected to the bottom wall 132. The support beam 12, the sealant wall 131, and the base plate 11 together form a placement groove 1a, in which the battery cell assembly 2 is disposed. The bottom wall 132 is bonded to the battery cell assembly 2 via the adhesive layer 14.

[0120] For example, please refer to Figures 2 to 10. The support beam 12 is disposed on the surface of the base plate 11 facing the first side X1 in the first direction X. The bottom wall 132 is connected to the surface of the base plate 11 facing the first side X1. The adhesive barrier wall 131 is connected to the first side X1 of the bottom wall 132. The placement groove 1a opens towards the first side X1.

[0121] The base plate 11 is generally flat and can be used to support and fix the battery cell assembly 2. The flat structure means that the two surfaces of the base plate 11 facing the first direction X are generally flat, and the first direction X is consistent with the thickness direction of the base plate 11.

[0122] The adhesive barrier 131 is connected to the first side X1 of the bottom wall 132. That is, the adhesive barrier 131 and the support beam 12 are both located on the first side X1 of the bottom plate 11. The support beam 12 and the adhesive barrier 131 can form a closed ring structure. The surface of the support beam 12 facing the placement groove 1a and the surface of the adhesive barrier 131 facing the placement groove 1a together form the circumferential wall of the placement groove 1a surrounding the first direction X.

[0123] It is understandable that during the process of assembling the battery cell assembly 2 into the placement slot 1a, the adhesive layer 14 is in a liquid state; after the assembly is completed, the adhesive layer 14 solidifies into a solid state.

[0124] During the assembly of the battery cell assembly 2 into the placement slot 1a, the battery cell assembly 2 can enter the placement slot 1a as a whole from top to bottom. That is, during the assembly process, the first side X1 of the first direction X is above, the second side of the first direction X is below, the opening of the placement slot 1a faces upward, the battery cell assembly 2 enters the placement slot 1a and presses the adhesive layer 14 downward. During the assembly process, the adhesive layer 14 is in a liquid state. The liquid adhesive layer 14 is squeezed by the battery cell assembly 2 and the base plate 11 and flows around the battery cell assembly 2. The closed-loop structure formed by the support beam 12 and the adhesive barrier 131 surrounds the outer periphery of the battery cell assembly 2. The support beam 12 and the adhesive barrier 131 can jointly block the liquid adhesive layer 14, and to a certain extent prevent the liquid adhesive layer 14 from continuing to flow to the outside of the placement slot 1a until the liquid adhesive layer 14 solidifies into a solid state, thus completing the assembly of the battery cell assembly 2 into the box.

[0125] The cover 15 is connected to the base plate 11 to define the accommodating space. In other words, the cover 15 closes the opening of the placement slot 1a facing the first side X1, thereby improving the waterproof and dustproof performance of the battery box 1.

[0126] The battery device 100 provided in this embodiment of the present disclosure has a bottom wall 132 bonded to the battery cell assembly 2 via an adhesive layer 14. This not only improves the connection stability of the sealant 13 but also enhances the sealant-blocking reliability of the sealant 13. During the assembly of the battery cell assembly 2 into the placement tank 1a, the liquid adhesive layer 14 is squeezed by the battery cell assembly 2 and the bottom plate 11 and flows towards the periphery of the battery cell assembly 2. The support beam 12 and the sealant-blocking wall 131 surround the outer periphery of the battery cell assembly 2, and together they can block the liquid adhesive layer 14, thus preventing it from continuing to flow outside the placement tank 1a to a certain extent. In this way, by adding the sealant 13 and reusing the support beam 12 to block the liquid adhesive layer 14, the bottom plate 11 no longer needs to be provided with a closed-loop frame for sealant blocking, which can reduce costs and manufacturing process difficulty.

[0127] In some embodiments, the battery box 1 includes a seal, and the surface of the bottom plate 11 facing the first side X1 has a closed-loop sealing surface. The sealing surface surrounds the outer periphery of the sealant 13 and the support beam 12. The seal is disposed on the sealing surface, and the box cover 15 presses the seal against the bottom plate 11. In other words, the box cover 15 and the bottom plate 11 together clamp the seal, and the seal is achieved by the elastic deformation of the seal.

[0128] In this embodiment, the sealing surface surrounds the outer periphery of the adhesive baffle 13 and the support beam 12, meaning that the sealing surface is located outside the placement groove 1a. Since the adhesive baffle 13 and the support beam 12 can block the adhesive layer 14 from overflowing, they can prevent the adhesive from contaminating the sealing surface to a certain extent, thus avoiding the adhesive from affecting the sealing reliability between the lid 15 and the bottom plate 11.

[0129] The connection method between the cover 15 and the base plate 11 includes, but is not limited to, at least one of the following connection methods: welding, screw connection and bolt connection.

[0130] The specific material used for the adhesive layer 14 is not limited. The adhesive layer 14 can be made of thermally conductive structural adhesive or other adhesives that can achieve bonding.

[0131] In some embodiments, as shown in Figures 8 to 14, the surface of the bottom wall 132 away from the adhesive barrier 131 is bonded to the base plate 11. That is, the bottom wall 132 is fixed to the base plate 11.

[0132] In this embodiment, the adhesive baffle 13 can be fixed to the base plate 11. The adhesive baffle 13 is easy to assemble and operate, reducing the risk of the adhesive baffle 13 moving under force.

[0133] For example, the bottom wall 132 and the surface of the base plate 11 facing the first side X1 can be bonded. For instance, the bottom wall 132 and the surface of the base plate 11 facing the first side X1 can be bonded with double-sided tape or an adhesive substance. In this way, the adhesive layer 14 is difficult to penetrate between the bottom wall 132 and the base plate 11. For example, the bottom wall 132 and the surface of the base plate 11 facing the first side X1 can be sealed together.

[0134] It is understandable that the dimensions of the adhesive barrier 131 along the first direction X and the dimensions of the support beam 12 along the first direction X can be set according to requirements. For example, the dimensions of the adhesive barrier 131 along the first direction X and the dimensions of the support beam 12 along the first direction X can be designed according to the amount of adhesive layer 14 used.

[0135] In some embodiments, referring to Figures 7 and 10, the adhesive barrier 131 is spaced apart from the side of the battery cell assembly 2 to form an adhesive-containing space 100a. The adhesive-containing space 100a is a portion of the space in the placement groove 1a and is used to accommodate the adhesive overflowing from the adhesive layer 14.

[0136] The side of the battery cell assembly 2 refers to the surface of the battery cell assembly 2 facing the adhesive barrier 131.

[0137] In this embodiment, the adhesive barrier 131 and the side of the battery cell assembly 2 are spaced apart to form an adhesive space 100a. During the process of assembling the battery cell assembly 2 into the placement groove 1a, the adhesive overflowing from the adhesive layer 14 can enter the adhesive space 100a, reducing the squeezing force of the adhesive on the adhesive barrier 131.

[0138] In some embodiments, referring to Figures 3 and 4, the battery cell assembly 2 is connected to the support beam 12. The battery cell assembly 2 is fixed to the support beam 12, so that both the base plate 11 and the support beam 12 provide a fixing effect on the battery cell assembly 2, preventing the battery cell assembly 2 from being displaced by impact or other forces.

[0139] In some embodiments, referring to Figures 3 to 5, the battery cell assembly 2 includes two end plates 21 and a plurality of battery cells 22, with the plurality of battery cells 22 clamped between the two end plates 21, and the end plates 21 connected to the support beam 12. Thus, the plurality of battery cells 22 are clamped together by the two end plates 21.

[0140] Multiple battery cells 22 can be arranged along the second direction Y to form a unit, with two end plates 21 located at both ends of the unit along the second direction Y. The battery cell assembly 2 can be bundled into a module using straps, cable ties, or other binding components.

[0141] As an example, the end plate 21 and the support beam 12 can be connected by screws or bolts.

[0142] In some embodiments, the adhesive barrier 13 is a flexible structure. In this way, the adhesive barrier 13 can undergo elastic deformation under the squeezing force of the adhesive overflowing from the adhesive layer 14. This elastic deformation can not only increase the space to accommodate the adhesive, but also prevent excessive reaction force from causing the adhesive to flow to other locations.

[0143] A flexible structure is a structure that can undergo elastic deformation when subjected to the compressive force of the colloid overflowing from the adhesive layer 14.

[0144] The adhesive barrier 13 can be made of a flexible material, which is a material that can undergo tensile deformation and / or bending deformation and can recover its deformation. For example, the adhesive barrier 13 can be made of a non-metallic insulating material, such as silicone and / or rubber.

[0145] In some embodiments, the sealant 13 is an insulating structure. An insulating structure refers to a structure that is electrically insulated. This improves the reliability and safety of the battery device 100.

[0146] The adhesive barrier 13 can be made of an insulating material. An insulating material is a material that cannot conduct electricity. For example, the adhesive barrier 13 can be made of a non-metallic insulating material.

[0147] In some embodiments, please refer to Figures 3, 4, 5 and 10. The battery cell assembly 2 is disposed on the first side X1 of the base plate 11 along the first direction X. The battery cell assembly 2 includes a cell unit 20. The cell unit 20 includes at least two battery cells 22 stacked along the second direction Y. The second direction Y is perpendicular to the surface with the largest area in the battery cell 22. Two support beams 12 are disposed on both sides of the cell unit 20 along the second direction Y. Two adhesive baffles 13 are spaced apart along the third direction Z. Each adhesive baffle 13 is connected to the two support beams 12 at both ends along the second direction Y. The first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0148] As an example, please refer to Figures 3, 4, and 10. The projection of the base plate 11 onto a projection plane perpendicular to the first direction X is approximately rectangular. The two support beams 12 can be spaced apart along the length of the base plate 11, and the two adhesive baffles 13 can be spaced apart along the width of the base plate 11. That is, the second direction Y can be aligned with the length of the base plate 11, and the third direction Z can be aligned with the width of the base plate 11. It is understood that in other examples, the two support beams 12 can be spaced apart along the width of the base plate 11, and the two adhesive baffles 13 can be spaced apart along the length of the base plate 11. That is, the third direction Z can be aligned with the length of the base plate 11, and the second direction Y can be aligned with the width of the base plate 11.

[0149] In some embodiments, see Figure 5, at least two individual units 20 are arranged along the third direction Z.

[0150] In this embodiment, two support beams 12 and two adhesive baffles 13 are sequentially connected to form a closed-loop structure. The two support beams 12 can resist the expansion force of the battery cell 22, providing stable support for the battery cell assembly 2 and preventing displacement caused by unstable fixing of the battery cell assembly 2. The two support beams 12 can also provide fixed positions for the two adhesive baffles 13, so that both ends of the two adhesive baffles 13 along the second direction Y can be effectively fixed, preventing displacement of the adhesive baffles 13.

[0151] The support beam 12 can be made of metal, for example, the support beam 12 can be a metal profile.

[0152] In some embodiments, referring to Figure 7, the battery cell assembly 2 is disposed on the first side X1 of the base plate 11 along the first direction X. With the plane perpendicular to the first direction X as the projection plane, the projections of the battery cell assembly 2, the adhesive layer 14, and the bottom wall 132 partially overlap. That is, part of the adhesive layer 14 is sandwiched between the battery cell assembly 2 and the bottom wall 132. During the assembly of the battery cell assembly 2 into the placement groove 1a, the force applied by the battery cell assembly 2 can be transmitted to the bottom wall 132, pressing the bottom wall 132 firmly against the base plate 11, further reducing the risk of displacement of the adhesive baffle 13 during assembly.

[0153] In some embodiments, referring to Figures 3 to 14, the battery cell assembly 2 is disposed on a first side X1 of the base plate 11 along a first direction X. The adhesive barrier 13 includes a connecting wall 133, which is connected to one end of the adhesive barrier wall 131 along a second direction Y. The connecting wall 133 is bent toward the side where the battery cell assembly 2 is located. The connecting wall 133 is connected to the support beam 12. The first direction X is perpendicular to the second direction Y. As an example, the support beam 12 may be located approximately at the end 1311 of the adhesive barrier wall 131 along the second direction Y.

[0154] In this embodiment, the connecting wall 133 is connected to the support beam 12, and the end 1311 of the adhesive-blocking wall 131 along the second direction Y is fixed, reducing the risk of the adhesive-blocking member 13 being deformed and displaced by the overflowing adhesive, and further improving the connection stability of the adhesive-blocking member 13.

[0155] In some embodiments, referring to Figures 8 to 14, the connecting wall 133 is disposed on the surface of the support beam 12 away from the battery cell assembly 2 along the second direction Y. This design, with the support beam 12 located on the side of the connecting wall 133 closer to the battery cell assembly 2 in the second direction Y, not only facilitates the connection between the battery cell assembly 2 and the support beam 12, but also avoids friction between the battery cell assembly 2 and the connecting wall 133 during assembly.

[0156] In other embodiments, the connecting wall 133 is disposed on the surface of the support beam 12 near the battery cell assembly 2 along the second direction Y.

[0157] In some embodiments, please refer to Figures 8 to 14. The support beams 12 are spaced apart along the second direction Y. The adhesive baffle 13 includes two connecting walls 133, which are respectively connected to the two ends of the adhesive baffle wall 131 along the second direction Y. The two connecting walls 133 are respectively connected to the two support beams 12.

[0158] In some embodiments, referring to Figures 8 to 14, the connecting wall 133 is bonded to the support beam 12 and / or connected by fasteners 3. That is, the connecting wall 133 and the support beam 12 are fixed by at least one of bonding and fastener connection 3.

[0159] For example, the connecting wall 133 may be bonded to the support beam 12 only. Alternatively, the connecting wall 133 may be connected to the support beam 12 only via fastener 3. Yet another example is that the connecting wall 133 is bonded to the support beam 12 and connected via fastener 3.

[0160] In this embodiment, the connecting wall 133 is bonded to the support beam 12 and / or connected by fasteners 3, which is a simple and convenient connection method.

[0161] As an example, please refer to Figures 8 to 11. The connecting wall 133 and the support beam 12 can be bonded together with double-sided tape or an adhesive substance.

[0162] Fasteners 3 include, but are not limited to, rivets, screws, or bolts.

[0163] As an example, referring to Figures 12 to 14, the connecting wall 133 may form a through hole 133a, and a fastener 3, such as a rivet, may be inserted through the through hole 133a and connected to the support beam 12.

[0164] The material of fastener 3 is not limited. For example, the material of fastener 3 includes, but is not limited to, metal or plastic.

[0165] In some embodiments, referring to Figures 8 to 14, the battery cell assembly 2 is disposed on a first side X1 of the base plate 11 along the first direction X. The adhesive-resistant wall 131 includes an end portion 1311 and a main body portion 1312. The end portion 1311 connects the main body portion 1312 and the connecting wall 133. The end portion 1311 is connected to the end face of the support beam 12 facing the third direction Z. The first direction X and the third direction Z are perpendicular to each other. That is, the end portion 1311 is connected to one end of the main body portion 1312 along the second direction Y.

[0166] In this embodiment, the end 1311 is connected to the end face of the support beam 12 facing the third direction Z. This not only strengthens the connection stability of the adhesive baffle 13, but also reduces the probability of adhesive getting trapped in the gap between the end 1311 and the support beam 12 to a certain extent.

[0167] In some embodiments, please refer to Figures 8 to 14. The support beams 12 are spaced apart along the second direction Y. The adhesive barrier 131 includes two ends 1311, which are respectively connected to the two ends of the main body 1312 along the second direction Y. The two ends 1311 are respectively connected to the end faces of the two support beams 12 facing the third direction Z.

[0168] In some embodiments, end 1311 is bonded to the Z-oriented end face of support beam 12. Exemplarily, end 1311 and the Z-oriented end face of support beam 12 are bonded using double-sided adhesive or an adhesive substance. This allows for a sealed connection between the opposing surfaces of end 1311 and support beam 12, more effectively preventing adhesive from adhesive layer 14 from entering between end 1311 and support beam 12.

[0169] In some embodiments, referring to Figures 8 to 14, the main body 1312 protrudes to the end 1311 on the first side X1. The main body 1312 is mainly used to block the adhesive layer 14 from overflowing. The main body 1312 protrudes to the end 1311 on the first side X1. The dimension of the main body 1312 along the first direction X is larger than the dimension of the end 1311 along the first direction X. The overflowing adhesive needs to climb a higher height to cross the main body 1312 and spread outside the placement groove 1a, which can improve the adhesive blocking effect.

[0170] For example, the surface of the end portion 1311 facing the first side X1 is flush with the surface of the support beam 12 facing the first side X1. That is, in the first direction X, the height of the end portion 1311 and the support beam 12 are substantially the same, and the main body portion 1312 protrudes from the support beam 12 towards the first side X1.

[0171] In some embodiments, as shown in Figure 15, the end of the adhesive barrier 131 away from the bottom wall 132 is connected to the battery cell assembly 2.

[0172] During the assembly of the battery cell assembly 2 into the placement tank 1a, the adhesive baffle 13 can be connected to the base plate 11 and the support beam 12 first, and then the battery cell assembly 2 can be placed into the placement tank 1a as a whole from top to bottom. During the assembly process, the adhesive layer 14 is in a liquid state. The liquid adhesive layer 14 is squeezed by the battery cell assembly 2 and the base plate 11 and flows towards the periphery of the battery cell assembly 2. The support beam 12 and the adhesive baffle wall 131 can jointly block the liquid adhesive layer 14. After the battery cell assembly 2 enters the placement tank 1a, the end of the adhesive baffle wall 131 away from the bottom wall 132 can be connected to the battery cell assembly 2.

[0173] In this embodiment, the end of the adhesive-blocking wall 131 away from the bottom wall 132 is connected to the battery cell assembly 2. This not only further strengthens the connection stability of the adhesive-blocking component 13, but also prevents the cover 15 from pressing against the adhesive-blocking wall 131 during the assembly of the cover 15 and the bottom plate 11. In some embodiments, please refer to Figures 11 and 15. The main body 1312 includes an adhesive-receiving sub-part 13121 and a folding sub-part 13122. The adhesive-receiving sub-part 13121 connects the folding sub-part 13122 and the bottom wall 132. The adhesive-receiving sub-part 13121 is spaced apart from the side of the battery cell assembly 2 to form an adhesive-receiving space 100a (see Figure 7). Please refer to Figure 15. The folding sub-part 13122 is bonded to the side of the battery cell assembly 2.

[0174] In this embodiment, during the assembly of the battery cell assembly 2 into the placement slot 1a, the adhesive overflowing from the adhesive layer 14 can enter the adhesive space 100a, reducing the squeezing force of the adhesive on the adhesive-blocking wall 131. The folding part 13122 is bonded to the side of the battery cell assembly 2, which not only further strengthens the connection stability of the adhesive-blocking part 13, but also prevents the cover 15 from pressing against the adhesive-blocking wall 131 during the assembly of the cover 15 and the base plate 11.

[0175] In some embodiments, as shown in Figures 10 to 14, the bottom wall 132 is generally a sheet-like structure extending along the second direction Y.

[0176] In some embodiments, referring to Figures 10 to 14, the adhesive barrier 131 is generally a sheet-like structure extending along the second direction Y.

[0177] In some embodiments, referring to Figures 10 to 14, the connecting wall 133 is generally a sheet-like structure extending in the third direction Z.

[0178] In some embodiments, the adhesive baffle 13 can be a one-piece molded structure. The adhesive baffle 13 has good structural strength, simple structure, and is easy to manufacture.

[0179] In some embodiments, the interior of the base plate 11 may form channels for the flow of heat exchange fluid. In other words, the base plate 11 can be used to exchange heat with the battery cell 22 to regulate the temperature of the battery cell 22.

[0180] The heat exchange fluid is a flowable fluid, including but not limited to water.

[0181] In one specific embodiment, referring to Figures 2 to 14, the battery device 100 includes a battery box 1 and a battery cell assembly 2. The battery box 1 includes a base plate 11, a support beam 12, and a sealant 13. The support beam 12 is disposed on the base plate 11 and located around the periphery of the battery cell assembly 2. The sealant 13 includes a sealant wall 131 and a bottom wall 132. The bottom wall 132 and the support beam 12 are disposed on the same surface of the base plate 11, and the sealant wall 131 connects to the bottom wall 132. The support beam 12, the sealant wall 131, and the base plate 11 together form a placement groove 1a. At least a portion of the base plate 11 and at least a portion of the bottom wall 132 are covered with an adhesive layer 14. The battery cell assembly 2 is disposed within the placement groove 1a and is bonded to the adhesive layer 14. Two support beams 12 are spaced apart along the second direction Y, and two adhesive baffles 13 are spaced apart along the third direction Z. Each adhesive baffle 13 is connected to two support beams 12 at both ends along the second direction Y. The adhesive baffle 13 includes a connecting wall 133, which is connected to one end of the adhesive baffle wall 131 along the second direction Y, and the connecting wall 133 is bent toward the side where the battery cell assembly 2 is located. The connecting wall 133 is connected to the support beams 12. The battery cell assembly 2 is disposed in the placement groove 1a, and is bonded to the adhesive layer 14. The battery cell assembly 2 is also connected to the support beams 12.

[0182] In this embodiment, the bottom wall 132 is connected to the surface of the bottom plate 11 facing the battery cell assembly 2, the connecting wall 133 is connected to the support beam 12, and the end 1311 of the adhesive-blocking wall 131 along the second direction Y is fixed. The adhesive-blocking member 13 can be fixed to the bottom plate 11 and the support beam 12, reducing the risk of the adhesive-blocking member 13 being deformed and displaced by the overflowing adhesive, and further improving the connection stability of the adhesive-blocking member 13. Using the adhesive layer 14 to cover at least a portion of the bottom wall 132 further improves the connection stability of the adhesive-blocking member 13 and can reduce the risk of the adhesive-blocking member 13 moving under force. During the process of assembling the battery cell assembly 2 into the placement tank 1a, the liquid adhesive layer 14 is squeezed by the battery cell assembly 2 and the bottom plate 11 and flows towards the periphery of the battery cell assembly 2, while the support beam 12 and the adhesive-blocking wall 131 surround the outer periphery of the battery cell assembly 2. The support beam 12 and the adhesive-blocking wall 131 can jointly block the liquid adhesive layer 14, and to a certain extent prevent the liquid adhesive layer 14 from continuing to flow to the outside of the placement tank 1a. Thus, by adding the adhesive barrier 13 and reusing the support beam 12 to block the liquid adhesive layer 14, the base plate 11 no longer needs to be equipped with a closed-loop frame for adhesive blocking, which can reduce costs and manufacturing process difficulty.

[0183] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. A battery device, comprising: Battery cell assembly; A battery box includes a base plate and a cover. The base plate supports the battery cell assembly, and the cover is connected to the base plate to define an accommodating space in which the battery cell assembly is located. An adhesive layer connects the battery cell assembly and the base plate. A support beam is disposed within the accommodating space, the support beam is disposed on the base plate and the support beam is located on the periphery of the battery cell assembly; and A sealant is provided, comprising a sealant wall and a bottom wall, the sealant wall being connected to the bottom wall, the support beam, the sealant wall, and the bottom plate forming a placement groove, the battery cell assembly being disposed in the placement groove, and the bottom wall being bonded to the battery cell assembly via the adhesive layer.

2. The battery device according to claim 1, wherein, The battery cell assembly is disposed on the first side of the base plate along the first direction, with the plane perpendicular to the first direction as the projection plane, and the projections of the battery cell assembly, the adhesive layer, and the bottom wall partially overlap.

3. The battery device according to claim 1 or 2, wherein, The battery cell assembly is disposed on the first side of the base plate along the first direction. The adhesive baffle includes a connecting wall, which is connected to one end of the adhesive baffle along the second direction and is bent toward the side where the battery cell assembly is located. The connecting wall is connected to the support beam, and the first direction is perpendicular to the second direction.

4. The battery device according to claim 3, wherein, The connecting wall is bonded to the support beam and / or connected by fasteners.

5. The battery device according to claim 3, wherein, The battery cell assembly is disposed on the first side of the base plate along the first direction. The adhesive barrier includes an end portion and a main body portion. The end portion connects the main body portion and the connecting wall. The end portion is connected to the end face of the support beam facing a third direction. The first direction and the third direction are perpendicular to each other.

6. The battery device according to claim 5, wherein, The main body protrudes from the end portion toward the first side.

7. The battery device according to claim 5, wherein, The support beams are spaced apart along the second direction, and the adhesive barrier includes two ends, which are respectively connected to the two ends of the main body along the second direction, and are respectively connected to the end faces of the two support beams facing the third direction.

8. The battery device according to claim 5, wherein, The end face is bonded to the end face of the support beam in the third direction.

9. The battery device according to claim 3, wherein, The support beams are spaced apart along the second direction, and the adhesive baffle includes two connecting walls, which are respectively connected to the two ends of the adhesive baffle along the second direction, and are respectively connected to the two support beams.

10. The battery device according to claim 3, wherein, The connecting wall forms a through hole, and fasteners are inserted through the through hole and connected to the support beam.

11. The battery device according to claim 1, wherein, The adhesive barrier is spaced apart from the side of the battery cell assembly to form an adhesive-containing space.

12. The battery device according to claim 1, wherein, The end of the adhesive-blocking wall away from the bottom wall is connected to the battery cell assembly.

13. The battery device according to claim 1, wherein, The surface of the bottom wall away from the adhesive barrier is bonded to the bottom plate.

14. The battery device according to claim 1, wherein, The battery cell assembly is connected to the support beam.

15. The battery device according to any one of claims 1 to 14, wherein, The adhesive-blocking component is a flexible structure.

16. The battery device according to any one of claims 1 to 15, wherein, The adhesive baffle is an insulating structure.

17. The battery device according to any one of claims 1 to 16, wherein, The battery cell assembly is disposed on the first side of the base plate along the first direction. The battery cell assembly includes a cell unit, and the cell unit includes at least two battery cells stacked along the second direction. The second direction is perpendicular to the surface with the largest area in the battery cell. Two support beams are disposed on both sides of the cell unit along the second direction. Two adhesive baffles are spaced apart along the third direction. Each adhesive baffle is connected to the two support beams at both ends along the second direction. The first direction, the second direction, and the third direction are perpendicular to each other.

18. The battery device according to any one of claims 1 to 16, wherein, The battery box includes a seal, the bottom plate has a closed-loop sealing surface on the surface facing the first side, the sealing surface surrounds the outer periphery of the baffle and the support beam, the seal is disposed on the sealing surface, and the box cover presses the seal against the bottom plate.

19. An electrical device comprising a battery device according to any one of claims 1 to 18, the battery device being used to store or provide electrical energy.

20. An energy storage device comprising a battery device according to any one of claims 1 to 18, the battery device being used to store or provide electrical energy.

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