Battery device and electric equipment

Abstract

The battery device comprises a box body, at least one battery monomer, an electric connecting piece and a restraining piece, the box body is provided with a containing space, the box body comprises a frame, the frame is used for forming the containing space and comprises a side beam, a containing groove is formed in the side, close to the containing space, of the side beam, and the restraining piece is arranged in the containing groove. At least one battery monomer is positioned in the accommodating space, the electric connecting piece comprises a main body section and a connecting section which are connected with each other, the connecting section is electrically connected with the at least one battery monomer, the main body section is arranged in the accommodating groove, and the restraining piece is detachably connected with the opening end of the accommodating groove and is used for restraining the at least one battery monomer. The restraining piece is configured to restrain the main body section; the two ends, in the vertical direction, of the restraining piece are provided with a clamping part and a lap joint part respectively, and the clamping part and the lap joint part are matched with the upper side edge and the lower side edge of the open end of the containing groove respectively. The disassembly and assembly efficiency can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology

[0002] With increasing environmental pollution, the new energy industry is attracting more and more attention. Within the new energy industry, battery technology is a crucial factor in its development.

[0003] Rechargeable battery cells, also known as secondary battery cells, are battery cells that can be recharged after discharge to reactivate the active materials and continue to be used. Rechargeable battery cells are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools. Improving the efficiency of battery assembly and disassembly is currently a key research focus. Utility Model Content

[0004] In one aspect of this disclosure, a battery device is provided, comprising:

[0005] A housing having a receiving space, the housing including a frame for forming the receiving space, wherein the frame includes a side beam, and the side beam has a receiving groove on the side near the receiving space;

[0006] At least one battery cell is located within the accommodating space;

[0007] An electrical connector includes a main body segment and a connecting segment connected to each other, the connecting segment being electrically connected to the at least one battery cell, and the main body segment being disposed in the receiving groove; and

[0008] A constraint member is detachably connected to the open end of the receiving groove, and the constraint member is configured to constrain the main body segment;

[0009] The constraint member has a snap-fit ​​part and an overlap part at both ends in the vertical direction, and the snap-fit ​​part and the overlap part respectively cooperate with the upper and lower edges of the opening end of the receiving groove.

[0010] According to embodiments of this disclosure, by providing a receiving groove and placing the main body segment of the electrical connector within it, the receiving groove provides space for the electrical connector. By setting a constraint member at the open end of the receiving groove to constrain the main body segment, the risk of damage caused by the main body segment swaying within the receiving groove can be reduced. Simultaneously, the constraint member isolates the electrical connector from nearby structural components, which helps reduce the risk of insulation withstand voltage failure and heat dissipation difficulties due to insufficient gaps between the electrical connector and nearby structural components. Furthermore, under conditions of compression or vibration, it helps reduce the risk of arcing failure of the electrical connector due to collision and wear of nearby structural components. The constraint member provides protection for the electrical connector, reducing the required protection and thus reducing the use of protective materials and lowering costs.

[0011] The detachable connection between the constraint and the opening of the receiving slot allows the constraint to be independent of the overall structure of the side beam. This increases the efficiency of the side beam's assembly and disassembly, and facilitates separate welding, machining, and other processing of the constraint, reducing machining steps and thus reducing parts processing costs. It also allows the constraint to be supplied as a whole with brackets, cable ties, and other suspension components for modular pre-assembly, reducing transportation and secondary processing and assembly costs. During after-sales maintenance, it facilitates rapid disassembly of the constraint for processing; for example, electrical connections can be exposed simply by removing the constraint, better meeting the needs of assembly lines and after-sales recycling and reuse.

[0012] Meanwhile, the snap-fit ​​and overlapping parts of the constraint component engage with the upper and lower edges of the opening end of the receiving groove, which improves the flexibility of assembling the constraint component with the receiving groove.

[0013] In some embodiments, the surface of the constraint member away from the receiving groove is provided with a fixing structure, which is configured to fix the pipelines inside the battery device.

[0014] In this embodiment, by setting a fixing structure on the surface of the constraint member away from the receiving groove, the space near the receiving groove can be used to accommodate the pipeline of the battery device, which is beneficial to improving the energy density of the battery device. In addition, when multiple constraint members are set, since the constraint members are set at the opening end of the receiving groove, and the fixing structure is also arranged along the extension direction of the receiving groove, the extension direction of the pipeline is more regular when it is fixed on the fixing structure, which helps to reduce the design difficulty of the battery device.

[0015] In some embodiments, the surface of the constraint member having the fixing structure is recessed toward the bottom wall of the receiving groove.

[0016] In this embodiment, the surface of the constraint member with the fixing structure is recessed towards the bottom wall of the receiving groove. This allows at least part of the fixing structure to be placed in the receiving groove, and the space defined by the receiving groove is used to accommodate the pipelines and other structures of the battery device, reducing the space occupied by these structures and improving the energy density of the battery device. At the same time, the receiving groove can also be used to protect the pipelines fixed on the fixing structure, reducing the risk of collision or wear of the pipelines by structural components near the pipelines.

[0017] In some embodiments, the electrical connector includes a tab that is electrically connected to the electrode leads of the battery cell.

[0018] In this embodiment, the electrical connector includes a plate, which is beneficial for shielding the plate through the constraint member, reducing electromagnetic interference between the plate and the external cables of the receiving slot, and providing conditions for the cables inside the battery device to be arranged near the outside of the constraint member, which is beneficial for improving the flexibility of pipeline arrangement inside the battery device.

[0019] In some embodiments, a fire-resistant material and / or an insulating material is provided between the surface of the constraint member on the side near the receiving groove and the electrical connector.

[0020] In this embodiment, fire-resistant material and / or insulating material are disposed between the surface of the constraint member near the receiving groove and the electrical connector, which enables the constraint member to achieve extended functions of fire resistance and insulation, forming fire-resistant and insulating protection for the electrical connector, and at the same time, it is beneficial to further constrain the electrical connector.

[0021] In some embodiments, the battery device includes a plurality of the constraint members, which are spaced apart along the extension direction of the side beam.

[0022] In this embodiment, setting multiple constraint members can provide targeted protection for certain locations of the electrical connector without completely sealing the opening of the receiving groove, which can save the material of the constraint members and help reduce costs.

[0023] In some embodiments, the bottom wall of the receiving groove is provided with at least one group of ribs, each group of ribs including a plurality of ribs, the extension direction of the plurality of ribs being parallel to the extension direction of the side beam;

[0024] The main body segment is disposed between adjacent ribs among the plurality of ribs, and / or the main body segment is disposed between the ribs and the sidewall of the receiving groove.

[0025] In this embodiment, at least one group of ribs acts as a reinforcing rib, increasing the strength of the bottom wall of the receiving groove. Furthermore, each group of ribs includes multiple ribs, with the main body segment positioned between adjacent ribs and / or between the ribs and the sidewall of the receiving groove. When the main body segment cannot extend at the same height, for example, to avoid other structures, the multiple ribs can provide a receiving area and support for parts of the main body segment, improving the flexibility and reliability of the main body segment's arrangement. Simultaneously, the straight grooves formed between the ribs simplify the wiring structure of the main body segment, thereby reducing design and verification difficulty.

[0026] In some embodiments, the battery device further includes:

[0027] A reinforcing beam is provided in the receiving space, and one end of the reinforcing beam is provided with a connecting part, which is fixedly connected to the receiving groove.

[0028] The bottom wall of the receiving groove is provided with a plurality of rib groups, and there is a gap between adjacent rib groups. The projection of the connecting part and the rib group on the bottom wall of the receiving groove does not coincide.

[0029] In this embodiment, the rigidity of the box body can be improved by setting reinforcing beams. By setting multiple groups of stiffeners and providing gaps between adjacent groups of stiffeners, the connection of the reinforcing beams can be avoided, which is beneficial for the connection between the connection and the bottom wall of the receiving groove, and improves the reliability of the connection between the connection and the receiving groove.

[0030] In some embodiments, the body segment includes:

[0031] The fixing part is supported by the rib group; and

[0032] An avoidance portion is provided between adjacent rib groups, and the projection of the avoidance portion and the connecting portion on the bottom wall of the receiving groove does not coincide.

[0033] In this embodiment, the main body segment includes a fixed part and a clearance part. The clearance part provides space for the connecting part, which helps to form a compact and reliable layout between the rib group, the main body segment and the connecting part.

[0034] In another aspect of this disclosure, an electrical device is provided, including the aforementioned battery device. Attached Figure Description

[0035] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0036] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0037] Figure 1 These are schematic diagrams of the structure of some embodiments of the electrical equipment according to this disclosure;

[0038] Figure 2 This is an exploded schematic diagram of some embodiments of the battery device according to the present disclosure;

[0039] Figure 3 This is an exploded view of the mounting structure of the frame, electrical connectors, restraints, and reinforcing beams according to some embodiments of the battery device of this disclosure;

[0040] Figure 4 This is an exploded view of the mounting structure of the frame, electrical connectors and constraints according to some embodiments of the battery device of this disclosure;

[0041] Figure 5 (a) is a front view schematic diagram of a constraint member according to some embodiments of the battery device of this disclosure. Figure 5 (b) is a schematic left cross-sectional view of a constraint member according to some embodiments of the battery device of the present disclosure;

[0042] Figure 6 This is a side cross-sectional schematic diagram of the side beam according to some embodiments of the battery device of this disclosure;

[0043] Figure 7 This is an exploded structural diagram of the side beam according to some embodiments of the battery device of this disclosure;

[0044] Figure 8 This is a schematic diagram of the mounting structure of the side beam according to some embodiments of the battery device of this disclosure;

[0045] It should be understood that the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Furthermore, the same or similar reference numerals denote the same or similar components.

[0046] Figure label:

[0047] 10. Box body; 11. Frame; 111. Side beam; 112. Receiving groove;

[0048] 20. Battery cell;

[0049] 30. Electrical connector; 31. Main body section; 311. Fixing part; 312. Clearance part; 32. Connecting section;

[0050] 40. Constraint; 41. Fixing structure; 411. First cable tie; 412. Locking structure; 413. Second cable tie; 42. Snap-fit ​​part; 43. Overlap part;

[0051] 51. Fireproof materials; 52. Insulating materials;

[0052] 60. Reinforcing bar group; 61. Reinforcing bar;

[0053] 70. Reinforcing beam; 71. Connecting part;

[0054] 80. Battery device;

[0055] 90. Vehicle; 91. Controller; 92. Motor; 93. Axle; 94. Wheel. Detailed Implementation

[0056] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0057] When using terms like "includes" or "contains," to describe an element as "including" or "containing" one or more elements, it should be understood that the elements listed after the word are components of the element preceding the word, but this does not preclude the possibility that the element preceding the word may also contain other elements. Furthermore, this statement specifically covers situations where the element preceding the word is entirely composed of or specifically realized by all the elements listed after the word.

[0058] The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0059] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0060] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0061] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0062] As the new energy market demands increasingly higher energy density from battery packs, the space available for electrical connectors is becoming increasingly limited, potentially leading to thermal failure risks such as insulation withstand voltage issues. In some related technologies, the side beam is integrally molded and has cavities, within which the electrical connectors are arranged.

[0063] Research has found that the one-piece molding of the side beams leads to lower assembly and disassembly efficiency. When performing processes such as welding or machining holes on the inner wall of the side beams, the one-piece molding structure makes disassembly difficult, limiting tooling space and tool size, hindering the convenient fixing of supports and cable ties, and resulting in more cumbersome procedures. It also leads to difficulties in after-sales maintenance and recycling.

[0064] In view of this, the present disclosure provides a battery device and electrical equipment that can improve disassembly and assembly efficiency.

[0065] In one aspect of this disclosure, a battery device is provided, comprising:

[0066] A housing having a receiving space, the housing including a frame for forming the receiving space, wherein the frame includes a side beam, and the side beam has a receiving groove on the side near the receiving space;

[0067] At least one battery cell is located within the accommodating space;

[0068] An electrical connector includes a main body segment and a connecting segment connected to each other, the connecting segment being electrically connected to the at least one battery cell, and the main body segment being disposed in the receiving groove; and

[0069] A constraint member is detachably connected to the open end of the receiving groove, and the constraint member is configured to constrain the main body segment;

[0070] The constraint member has a snap-fit ​​part and an overlap part at both ends in the vertical direction, and the snap-fit ​​part and the overlap part respectively cooperate with the upper and lower edges of the opening end of the receiving groove.

[0071] According to embodiments of this disclosure, by providing a receiving groove and placing the main body segment of the electrical connector within it, the receiving groove provides space for the electrical connector. By setting a constraint member at the open end of the receiving groove to constrain the main body segment, the risk of damage caused by the main body segment swaying within the receiving groove can be reduced. Simultaneously, the constraint member isolates the electrical connector from nearby structural components, which helps reduce the risk of insulation withstand voltage failure and heat dissipation difficulties due to insufficient gaps between the electrical connector and nearby structural components. Furthermore, under conditions of compression or vibration, it helps reduce the risk of arcing failure of the electrical connector due to collision and wear of nearby structural components. The constraint member provides protection for the electrical connector, reducing the required protection and thus reducing the use of protective materials and lowering costs.

[0072] The detachable connection between the constraint and the opening of the receiving slot allows the constraint to be independent of the overall structure of the side beam. This increases the efficiency of the side beam's assembly and disassembly, facilitates the separate welding and machining of the constraint, reduces processing steps and thus lowers parts processing costs, and enables the constraint to be supplied as a whole with brackets, cable ties, and other suspension components for modular pre-assembly, thereby reducing transportation and secondary processing and assembly costs. During after-sales maintenance, it facilitates the rapid disassembly of the constraint for processing; for example, electrical connections can be exposed simply by removing the constraint, better meeting the needs of assembly lines and after-sales recycling and reuse.

[0073] Meanwhile, the snap-fit ​​and overlapping parts of the constraint component engage with the upper and lower edges of the opening end of the receiving groove, which improves the flexibility of assembling the constraint component with the receiving groove.

[0074] The battery device disclosed herein is applicable to various types of electrical devices that use battery devices. These electrical devices can include mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; and power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. This disclosure does not impose any particular limitation on the aforementioned electrical devices. The battery device can be used to power vehicles and other electrical devices, for example, to provide power for vehicle operation or driving.

[0075] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0076] Figure 1This is a structural schematic diagram of some embodiments of the electrical equipment disclosed herein. For convenience, a vehicle is used as an example for explanation. The vehicle 90 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle or a hybrid vehicle, etc. A battery device 80 can be installed at the bottom, front, or rear of the vehicle 90.

[0077] The battery device 80 can be used to power the vehicle 90. For example, the battery device 80 can serve as the operating power source for the vehicle 90's electrical system, such as meeting the power requirements for starting, navigation, and operation of the vehicle 90. The battery device 80 can not only serve as the operating power source for the vehicle 90, but also as the driving power source for the vehicle 90, replacing or partially replacing fuel or natural gas to provide propulsion for the vehicle 90.

[0078] The vehicle 90 may also house an axle 93, wheels 94, a motor 92, and a controller 91. The controller 91 controls the battery device 80 to supply power to the motor 92. For example, when the vehicle 90 uses the battery device 80 as its driving power source, the controller 91 can provide the motor 92 with the power required for constant speed and acceleration. The motor 92 drives the axle 93 to rotate, thereby rotating the wheels 94.

[0079] Figure 2 This is an exploded schematic diagram of some embodiments of the battery device according to the present disclosure. Figure 3 This is an exploded view of the mounting structure of the frame, electrical connectors, restraints, and reinforcing beams according to some embodiments of the battery device of this disclosure. Figure 4 This is an exploded view of the mounting structure of the frame, electrical connectors, and constraints according to some embodiments of the battery device of this disclosure. Figure 6 This is a side cross-sectional schematic diagram of the side beam according to some embodiments of the battery device of this disclosure.

[0080] refer to Figures 2-4 and Figure 6This disclosure provides a battery device 80, including a housing 10, at least one battery cell 20, an electrical connector 30, and a constraint member 40. The housing 10 has a receiving space and includes a frame 11 for forming the receiving space. The frame 11 includes a side beam 111, and the side beam 111 has a receiving groove 112 on the side near the receiving space. At least one battery cell 20 is located within the receiving space. The electrical connector 30 includes a main body segment 31 and a connecting segment 32 connected to each other. The connecting segment 32 is electrically connected to at least one battery cell 20, and the main body segment 31 is disposed in the receiving groove 112. The constraint member 40 is detachably connected to the open end of the receiving groove 112, and the constraint member 40 is configured to constrain the main body segment 31. The constraint member 40 has a snap-fit ​​portion 42 and an overlap portion 43 at its two ends in the vertical direction, respectively, and the snap-fit ​​portion 42 and the overlap portion 43 cooperate with the upper and lower edges of the open end of the receiving groove 112.

[0081] refer to Figure 2 In some embodiments, the battery device 80 includes a housing 10, a cover, and one or more battery cells 20 disposed within the housing 10. The housing 10, while housing the battery cells 20, also provides functions such as cooling, sealing, and shock protection for the battery cells 20, and can prevent liquids or other foreign matter from adversely affecting the charging, discharging, or reliability of the battery cells 20. The cover can be closed onto the end of the housing 10 to seal the housing 10.

[0082] The housing 10 includes a frame 11, which can refer to a frame structure that forms a closed shape. The internal area of ​​the closed shape enclosed by the frame structure is a receiving space, in which at least one battery cell 20 is located. The housing 10 may further include a base plate, and the bottom of the frame 11 is fixedly connected to the base plate, thereby further enclosing the receiving space.

[0083] The frame 11 includes a side beam 111, which may be located at the upper edge of the frame 11, for example. The side beam 111 may be provided with a connecting structure for connecting the box body 10 and the box cover. The side beam 111 has a receiving groove 112 on the side near the receiving space, and the opening of the receiving groove 112 may face the receiving space.

[0084] The individual battery cells 20 can be electrically connected in various ways, such as series, parallel, or mixed connection, to achieve the required electrical performance parameters of the battery device 80. Multiple battery cells 20 can be arranged in rows, and one or more rows of battery cells 20 can be arranged in the housing as needed.

[0085] In some embodiments, the individual battery cells 20 of the battery device 80 can be arranged along at least one of the length and width directions of the housing 10. At least one row or column of battery cells 20 can be provided as needed. Alternatively, one or more layers of battery cells 20 can be provided along the height direction of the battery device 80 as required.

[0086] In some embodiments, multiple battery cells 20 may first be connected in series, parallel, or in a mixed manner to form a battery module, and then the multiple battery modules may be connected in series, parallel, or in a mixed manner to form a whole, which is housed within the housing 10. In other embodiments, all battery cells 20 are directly connected in series, parallel, or in a mixed manner, and then the whole consisting of all battery cells 20 is housed within the housing 10. The electrode terminals of the battery cells 20 may be electrically connected to adjacent battery cells 20 via a busbar.

[0087] In this embodiment of the disclosure, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0088] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this disclosure does not limit this type. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes, and this disclosure does not limit this type either. Battery cells 20 are generally classified into cylindrical battery cells, square battery cells, and pouch battery cells according to their packaging method, and this disclosure does not limit this type either.

[0089] The battery cell 20 of this disclosure is applicable to various types of battery devices. The battery device referred to herein is a physical module that includes one or more battery cells 20 to provide higher voltage and capacity.

[0090] As an example, the battery cell 20 includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The separator is located between the positive and negative electrode. The operation of the battery cell 20 is achieved by the movement of internal metal ions between the positive and negative electrode. During the charging and discharging process of the battery cell 20, active ions (e.g., lithium ions) repeatedly insert and extract between the positive and negative electrode. The separator, positioned between the positive and negative electrode, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0091] The positive electrode includes a positive active material layer. The positive electrode may also include a positive current collector substrate, with the positive active material layer disposed on the surface of the positive current collector substrate. For example, the positive active material layer may be disposed on one surface or both opposite surfaces in the thickness direction of the positive current collector substrate.

[0092] As an example, the positive electrode current collector substrate can be a metal foil or a composite current collector. For example, as a metal foil, silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc., can be used. The composite current collector may include a polymer material base layer and a metal layer. The composite current collector can be formed by applying a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) onto a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0093] As an example, the positive electrode active material layer 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 positive electrode active material layers may also be used. These positive electrode active material layers 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) 0.85 Co 0.15 Al 0.05At least one of O2 and its modified compounds.

[0094] The negative electrode sheet includes a negative electrode active material layer. The negative electrode sheet may also include a negative electrode current collector substrate, with the negative electrode active material layer disposed on the surface of the negative electrode current collector substrate. For example, the negative electrode active material layer may be disposed on one surface or both opposite surfaces in the thickness direction of the negative electrode current collector substrate.

[0095] As an example, the negative electrode current collector substrate can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrodes, carbon, nickel, or titanium, etc. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by applying a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) onto a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0096] As an example, the negative electrode active material layer may employ a negative electrode active material layer known in the art for use in battery cell 20. As an example, the negative electrode active material layer 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 material layers may also be used. These negative electrode active material layers may be used alone or in combination of two or more.

[0097] In some embodiments, the separator is a diaphragm. This disclosure does not impose any particular limitation on the type of diaphragm; the separator can be any known porous structure separator with good chemical and mechanical stability.

[0098] 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 separate component located between the positive and negative electrode plates, or it can be located between the positive and negative electrode plates while being attached to the surface of the positive electrode plate and / or the surface of the negative electrode plate.

[0099] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrode plates, serving both to transport ions and to isolate the positive and negative electrodes.

[0100] In some embodiments, the battery cell 20 further includes an electrolyte, which acts as a conductor of 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.

[0101] As an example, liquid electrolytes include electrolyte salts and solvents.

[0102] 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.

[0103] 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.

[0104] As an example, gel electrolytes include a polymer-based backbone network combined with an ionic liquid—a lithium salt.

[0105] As an example, solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0106] As an example, polymer solid electrolytes can be polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0107] 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.

[0108] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0109] The electrical connector 30 can be, for example, a busbar or wire harness, and the material can be, for example, copper, silver, or an alloy. The electrical connector 30 includes a main body segment 31 and a connecting segment 32 disposed at at least one end of the main body segment 31. Figure 3 and Figure 4 In the process, the electrical connector 30 includes two connecting sections 32. The main body section 31 can refer to the part that is attached to the bottom wall of the receiving groove 112, and the connecting section 32 can refer to the part that is bent and extends away from the receiving groove 112. The connecting section 32 is electrically connected to at least one battery cell 20, thereby realizing the charging or discharging process of the battery cell 20.

[0110] The electrical connector 30 can be integrally formed by bending to form the main body segment 31 and the connecting segment 32, or the main body segment 31 and the connecting segment 32 can be fixedly connected to form the electrical connector 30 together.

[0111] At least a portion of the main body segment 31 is disposed in the receiving groove 112, and the main body segment 31 may be disposed entirely in the receiving groove 112. Alternatively, the receiving groove 112 may not be disposed continuously, and at intervals therebetween, the main body segment 31 may be disposed outside the receiving groove 112.

[0112] The constraint member 40 is detachably connected to the open end of the receiving groove 112. The shape of the constraint member 40 includes, but is not limited to, sheet-like or block-like shapes. The constraint member 40 and the receiving groove 112 can be connected in a detachable manner, including but not limited to snap-fit ​​or embedding. The constraint member 40 is configured to constrain the portion of the main body segment 31 located in the receiving groove 112. Here, constraining the portion of the main body segment 31 located in the receiving groove 112 means that when the portion of the main body segment 31 located in the receiving groove 112 moves in a direction away from the receiving groove 112 (that is, toward the open end of the receiving groove 112), the constraint member 40 can block the main body segment 31.

[0113] The constraint member 40 has a snap-fit ​​part 42 and an overlap part 43 at both ends in the vertical direction. The snap-fit ​​part 42 and the overlap part 43 respectively cooperate with the upper and lower edges of the opening end of the receiving groove 112. At the upper or lower edge of the opening end of the receiving groove 112, the receiving groove 112 may be provided with a first connecting part that cooperates with the snap-fit ​​part 42. The first connecting part extends away from the side wall of the receiving groove 112. The snap-fit ​​part 42 may be a snap-fit ​​groove that can slide with the first connecting part.

[0114] A second connecting portion that mates with the overlapping portion 43 can be provided at the edge of the opening end opposite to the first connecting portion on the side of the receiving groove 112. The form of the second connecting portion may include a boss. The overlapping portion 43 may include a first overlapping section and a second overlapping section. The first overlapping section extends toward the bottom wall of the receiving groove 112, and the second overlapping section extends perpendicular to the first overlapping section at the end of the first overlapping section near the bottom wall of the receiving groove 112. In this way, the two overlapping sections of the overlapping portion 43 respectively overlap with the two outer surfaces of the second connecting portion, and the snap-fit ​​portion 42 and the overlapping portion 43 can be slidably connected to the opening end of the receiving groove 112.

[0115] This allows for multiple installation methods for the constraint member 40. For example, the overlapping part 43 can be installed first on the lower side of the opening end of the receiving groove 112, and then the snap-fit ​​part 42 on the upper side can be installed; or the snap-fit ​​part 42 and the overlapping part 43 can be installed simultaneously from one end of the receiving groove 112, and then the constraint member 40 can be slid to the desired position.

[0116] According to the embodiments of this disclosure, by providing a receiving groove 112 and placing the main body segment 31 of the electrical connector 30 within the receiving groove 112, the receiving groove 112 can provide receiving space for the electrical connector 30. By providing a constraint member 40 at the open end of the receiving groove 112 to constrain the main body segment 31, the risk of damage caused by the main body segment 31 shaking within the receiving groove 112 can be reduced. Simultaneously, the constraint member 40 can isolate the electrical connector 30 from nearby structural components, which helps reduce the risk of insulation withstand voltage failure and heat dissipation difficulties caused by excessively small gaps between the electrical connector 30 and nearby structural components. Furthermore, under conditions of compression or vibration, it helps reduce the risk of electrical connector 30 failure due to collision and wear of nearby structural components. The constraint member 40 can provide protection for the electrical connector 30, reducing the protection requirements of the electrical connector 30 and helping to reduce the use of protective materials, thereby reducing costs.

[0117] The constraint member 40 is detachably connected to the open end of the receiving groove 112, making the constraint member 40 independent of the overall structure of the side beam 111. This increases the efficiency of disassembly and assembly of the side beam 111, and facilitates separate welding, machining, and other processing of the constraint member 40. This reduces processing steps and thus parts processing costs. Furthermore, it allows the constraint member 40 to be supplied as a single unit with its mounting brackets, cable ties, and other suspension components for modular pre-assembly, reducing transportation and secondary processing costs. During after-sales maintenance, it facilitates rapid disassembly of the constraint member 40 for processing; for example, only the constraint member 40 needs to be removed to expose the electrical connector 30, better meeting the needs of assembly lines and after-sales recycling and reuse.

[0118] Meanwhile, by having the snap-fit ​​portion 42 and the overlapping portion 43 of the constraint member 40 engage with the upper and lower edges of the opening end of the receiving groove 112 respectively, the flexibility of assembling the constraint member 40 and the receiving groove 112 can be improved.

[0119] Figure 5 (a) is a front view schematic diagram of a constraint member according to some embodiments of the battery device of this disclosure. Figure 5 (b) is a left cross-sectional schematic view of a constraint member according to some embodiments of the battery device of this disclosure. Reference Figure 5 In some embodiments, the surface of the constraint member 40 away from the receiving groove 112 is provided with a fixing structure 41, which is configured to fix the pipeline inside the battery device 80.

[0120] exist Figure 5 In (a), the fixing structure 41 includes, but is not limited to, a first cable tie 411, a locking structure 412, and a second cable tie 413. The first cable tie 411 can be a bundling cable tie, the second cable tie 413 can be a round-hole disc buckle cable tie, and the locking structure 412 can be a C-shaped bracket welded to or integrally formed with the constraint member 40. It should be understood that it is not necessarily like... Figure 5 Instead of providing multiple fixing structures 41 on a single constraint member 40 as shown in (a), the selection can be made according to the type of pipeline to be fixed as needed. Here, the pipeline inside the battery device 80 can refer to pipes and / or cables. For example, pipes can be pipes required for cooling or heating, and cables can be low-voltage connection harnesses, etc.

[0121] In this way, the constraint member 40 not only serves to constrain and protect the electrical connector 30, but also provides electromagnetic shielding between the electrical connector 30 and the pipeline fixed by the fixing structure 41. Depending on the requirements, the constraint member 40 can be made of metal or plastic. Metal constraint members 40 have higher strength, while plastic constraint members 40 can achieve better shielding.

[0122] In this embodiment, by providing a fixing structure 41 on the surface of the constraint member 40 away from the receiving groove 112, the space near the receiving groove 112 can be used to accommodate the pipeline of the battery device 80, which is beneficial to improving the energy density of the battery device 80. In addition, when multiple constraint members 40 are provided, since the constraint members 40 are located at the open end of the receiving groove 112, and the fixing structure 41 is also arranged along the extension direction of the receiving groove 112, the extension direction of the pipeline when fixed on the fixing structure 41 is also more regular, which helps to reduce the design difficulty of the battery device 80.

[0123] refer to Figure 5 (b) and Figure 6In some embodiments, the surface of the constraint member 40 with the fixing structure 41 is recessed toward the bottom wall of the receiving groove 112.

[0124] exist Figure 5 (b) and Figure 6 In the middle, the constraint member 40 is recessed towards the bottom wall of the receiving groove 112 and is generally arc-shaped. Relative to the opening end of the receiving groove 112, the fixing structure 41 can be set on the surface of the constraint member 40 closer to the bottom wall of the receiving groove 112.

[0125] In this embodiment, the surface of the constraint member 40 with the fixing structure 41 is recessed towards the bottom wall of the receiving groove 112. This allows at least a portion of the fixing structure 41 to be placed in the receiving groove 112, which is beneficial for accommodating the pipeline of the battery device 80 within the space defined by the receiving groove 112, thereby increasing the energy density of the battery device 80. At the same time, it is also beneficial for protecting the pipeline fixed on the fixing structure 41 by using the receiving groove 112, thereby reducing the risk of collision or abrasion of the pipeline by structural components near the pipeline.

[0126] refer to Figure 3 , Figure 4 and Figure 6 In some embodiments, the electrical connector 30 includes a tab that is electrically connected to the electrode leads of the battery cell 20.

[0127] When the electrical connector 30 includes a strip, the strip is disposed within the cavity formed by the receiving groove 112 and the constraint member 40, so that the constraint member 40 can shield the strip. When the battery device 80 includes other cables such as low-voltage connectors, the constraint member 40 can also shield these cables, reducing electromagnetic interference between the strip and other cables.

[0128] In this embodiment, the electrical connector 30 includes a plate, which is beneficial for shielding the plate through the constraint member 40, reducing electromagnetic interference between the plate and the external cables of the receiving groove 112, and providing conditions for the cables in the battery device 80 to be arranged near the outside of the constraint member 40, which is beneficial for improving the flexibility of the pipeline arrangement inside the battery device 80.

[0129] refer to Figure 5 (b) and Figure 6 In some embodiments, a fire-resistant material 51 and / or an insulating material 52 are provided between the surface of the constraint member 40 on the side near the receiving groove 112 and the electrical connector 30.

[0130] exist Figure 6 In this configuration, the two opposing surfaces of the fire-retardant material 51 and / or the insulating material 52 can be respectively bonded to and abut against the constraint member 40 and the electrical connector 30. In this way, the electrical connector 30 and the constraint member 40 can mutually constrain their degrees of freedom, forming a mutual limiting relationship.

[0131] Fire-retardant material 51 includes, but is not limited to, materials such as metals and ceramics. It can also be a material that possesses both fire-retardant and insulating properties, such as mica paper, TC board, and foam. Insulating material 52 includes, but is not limited to, materials such as plastics. Similar to fire-retardant material 51, insulating material 52 can also be a material that possesses both fire-retardant and insulating properties. In other embodiments, a material with other functions, such as vibration-absorbing material, can be provided between the surface of the constraint member 40 near the receiving groove 112 and the electrical connector 30. Vibration-absorbing material includes, but is not limited to, foam.

[0132] In this embodiment, fire-retardant material 51 and / or insulating material 52 are disposed between the surface of the constraint member 40 near the receiving groove 112 and the electrical connector 30. This facilitates the constraint member 40 to achieve extended functions of fire resistance and insulation, providing fire-resistant and insulating protection for the electrical connector 30, while also further constraining the electrical connector 30.

[0133] Figure 7 This is an exploded structural diagram of the side beam according to some embodiments of the battery device of this disclosure.

[0134] refer to Figure 7 In some embodiments, the battery device 80 includes a plurality of constraint members 40, which are spaced apart along the extension direction of the side beam 111.

[0135] Some locations of the electrical connector 30 may be far from nearby structural components, posing no or minimal safety hazards. These locations do not require protection from the constraint member 40, while other locations do require protection from the constraint member 40. Multiple constraint members 40 can be installed at various protected locations on the electrical connector 30. The number of constraint members 40 can be, for example, 3, 4, or 5.

[0136] In this embodiment, the provision of multiple constraint members 40 can provide targeted protection for certain locations of the electrical connector 30 without completely sealing the opening of the receiving groove 112, which helps to save the material of the constraint members 40 and thus reduce costs.

[0137] refer to Figure 7 In some embodiments, the bottom wall of the receiving groove 112 is provided with at least one group of ribs 60, each group of ribs 60 including a plurality of ribs 61, the extension direction of the plurality of ribs 61 being parallel to the extension direction of the side beam 111, wherein the main body segment 31 is disposed between adjacent ribs 61 among the plurality of ribs 61, and / or the main body segment 31 is disposed between the ribs 61 and the side wall of the receiving groove 112.

[0138] exist Figure 7In each rib group 60, multiple ribs 61 can be arranged at intervals along the vertical direction, forming multiple receiving areas between the multiple ribs 61 and between the ribs 61 and the sidewall of the receiving groove 112. The multiple receiving areas are located at different positions in the vertical direction. When at least two rib groups 60 are provided, the main body section 31 can be installed at different heights when installed with different rib groups 60.

[0139] In this embodiment, at least one rib group 60 can act as a reinforcing rib, improving the strength of the bottom wall of the receiving groove 112. Furthermore, each rib group 60 includes multiple ribs 61, with the main body segment 31 disposed between adjacent ribs 61, and / or between the ribs 61 and the side wall of the receiving groove 112. When the main body segment 31 cannot extend continuously at the same height, the multiple ribs 61 can provide a receiving area and support for the main body segment 31, which improves the flexibility and reliability of the arrangement of the main body segment 31. Simultaneously, it facilitates the extension of the main body segment 31 along the bottom wall of the receiving groove 112 within the same plane. Without needing to avoid obstacles, the main body segment 31 can extend along a straight line, resulting in a more regular shape and simplifying the wiring structure of the main body segment 31, thereby reducing design and verification difficulties.

[0140] refer to Figure 3 and Figure 7 In some embodiments, the battery device 80 further includes a reinforcing beam 70 disposed in the receiving space. One end of the reinforcing beam 70 is provided with a connecting part 71, which is fixedly connected to the receiving groove 112. The bottom surface of the receiving groove 112 is provided with a plurality of rib groups 60, and there is a gap between adjacent rib groups 60. The projections of the connecting part 71 and the rib groups 60 on the bottom wall of the receiving groove 112 do not coincide.

[0141] The reinforcing beam 70 can improve the rigidity of the box 10 in the accommodating space. For example, the two ends of the reinforcing beam 70 can be fixedly connected to the side beam 111 and the side beam opposite to the side beam 111, respectively.

[0142] One end of the reinforcing beam 70 is provided with a connecting portion 71, which can be fixedly connected to the receiving groove 112. The fixed connection can be achieved by welding, for example. The connecting portion 71 may include a first surface fixedly connected to the bottom wall of the receiving groove 112 and a second surface fixedly connected to the side wall of the receiving groove 112, thus forming an L-shaped fixed connection surface.

[0143] In order to avoid the connection part 71, the bottom wall of the receiving groove 112 is provided with a plurality of rib groups 60, and there is a gap between adjacent rib groups 60. The projection of the connection part 71 on the bottom wall is located in the gap, that is, the projection of the connection part 71 and the rib group 60 on the bottom wall of the receiving groove 112 do not coincide.

[0144] In this embodiment, the rigidity of the box body 10 can be improved by setting a reinforcing beam 70. By setting multiple stiffener groups 60 and providing gaps between adjacent stiffener groups 60, the connecting part 71 of the reinforcing beam 70 can be avoided, which is beneficial for the fixed connection between the connecting part 71 and the bottom wall of the receiving groove 112, and improves the reliability of the connection between the connecting part 71 and the receiving groove 112.

[0145] Figure 8 This is a schematic diagram of the side beam mounting structure according to some embodiments of the battery device of this disclosure.

[0146] refer to Figure 8 In some embodiments, the main body segment 31 includes a fixing part 311 and a clearance part 312. The fixing part 311 is supported by the rib group 60, and the clearance part 312 is disposed between adjacent rib groups 60. The projection of the clearance part 312 and the connecting part 71 on the bottom wall of the receiving groove 112 does not coincide.

[0147] The extension direction of the fixing part 311 of the main body section 31 is parallel to the extension direction of the side beam 111, so that the fixing part 311 can be supported by the rib group 60. It should be understood that the height position of the fixing part 311 in different rib groups 60 can be different or the same. The projections of the clearance part 312 and the connecting part 71 on the bottom wall of the receiving groove 112 do not coincide. Figure 8 In the middle, the shape of the clearance part 312 is wavy and the position is higher than the adjacent fixed part 311, so that the space below the clearance part 312 can be used to set the connecting part 71.

[0148] In this embodiment, the main body segment 31 includes a fixing part 311 and a clearance part 312. The clearance part 312 provides space for the connecting part 71, which helps to form a compact and reliable layout between the rib group 60, the main body segment 31 and the connecting part 71.

[0149] The embodiments of the battery device 80 described above are applicable to various electrical devices. Therefore, in another aspect of this disclosure, an electrical device is provided that includes the aforementioned battery device 80.

[0150] The following is for reference. Figures 2-3 and Figures 5-8 A specific example of the battery device disclosed herein will be described.

[0151] The battery device 80 includes a housing 10, at least one battery cell 20, an electrical connector 30, and a restraint member 40. The housing 10 has a receiving space and includes a frame 11 for forming the receiving space. The frame 11 includes a side beam 111, and the side beam 111 has a receiving groove 112 on the side near the receiving space. At least one battery cell 20 is located within the receiving space. The electrical connector 30 includes a main body segment 31 and a connecting segment 32 connected to each other. The connecting segment 32 is electrically connected to at least one battery cell 20, and the main body segment 31 is disposed in the receiving groove 112. The restraint member 40 is detachably connected to the open end of the receiving groove 112 and is configured to restrain the main body segment 31.

[0152] Foam is provided between the surface of the constraint member 40 near the receiving groove 112 and the electrical connector 30. The electrical connector 30 is a tab that is electrically connected to the electrode lead-out end of the battery cell 20.

[0153] The battery assembly 80 includes a plurality of constraint members 40, which are spaced apart along the extension direction of the side beam 111. A fixing structure 41 is provided on the surface of the constraint member 40 away from the receiving groove 112, and the fixing structure 41 is configured to fix the pipelines inside the battery assembly 80. The surface of the constraint member 40 with the fixing structure 41 is recessed towards the bottom wall of the receiving groove 112. The constraint member 40 has a snap-fit ​​portion 42 and an overlapping portion 43 at its two ends in the vertical direction, respectively, which engage with the upper and lower edges of the opening end of the receiving groove 112.

[0154] The bottom wall of the receiving groove 112 is provided with at least one group of ribs 60, each group of ribs 60 includes a plurality of ribs 61, the extension direction of the plurality of ribs 61 is parallel to the extension direction of the side beam 111, wherein the main body section 31 is disposed between adjacent ribs 61 and between the ribs 61 and the side wall of the receiving groove 112.

[0155] The battery device 80 also includes a reinforcing beam 70, which is disposed in the receiving space. One end of the reinforcing beam 70 is provided with a connecting part 71, which is fixedly connected to the receiving groove 112. The bottom surface of the receiving groove 112 is provided with a plurality of rib groups 60, and there is a gap between adjacent rib groups 60. The projections of the connecting part 71 and the rib groups 60 on the bottom wall of the receiving groove 112 do not coincide.

[0156] The main body section 31 includes a fixing part 311 and a clearance part 312. The fixing part 311 is supported by the rib group 60, and the clearance part 312 is disposed between adjacent rib groups 60. The projection of the clearance part 312 and the connecting part 71 on the bottom wall of the receiving groove 112 does not coincide.

[0157] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0158] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A battery device (80), characterized in that, include: The box (10) has a receiving space, the box includes a frame (11) for forming the receiving space, wherein the frame (11) includes a side beam (111) and the side beam (111) has a receiving groove (112) on the side near the receiving space. At least one battery cell (20) is located within the accommodating space; An electrical connector (30) includes a main body segment (31) and a connecting segment (32) connected to each other, the connecting segment (32) being electrically connected to the at least one battery cell (20), and the main body segment (31) being disposed in the receiving groove (112); and A constraint member (40) is detachably connected to the open end of the receiving groove (112), and the constraint member (40) is configured to constrain the main body segment (31). The constraint member (40) has a snap-fit ​​part (42) and an overlap part (43) at both ends in the vertical direction, and the snap-fit ​​part (42) and the overlap part (43) respectively cooperate with the upper and lower edges of the opening end of the receiving groove (112).

2. The battery device (80) according to claim 1, characterized in that, The surface of the constraint member (40) away from the receiving groove (112) is provided with a fixing structure (41), which is configured to fix the pipeline inside the battery device (80).

3. The battery device (80) according to claim 2, characterized in that, The surface of the constraint member (40) with the fixing structure (41) is recessed toward the bottom wall of the receiving groove (112).

4. The battery device (80) according to claim 1, characterized in that, The electrical connector (30) includes a tab that is electrically connected to the electrode lead-out end of the battery cell (20).

5. The battery device (80) according to claim 1, characterized in that, The surface of the constraint member (40) near the receiving groove (112) is provided with fire-resistant material (51) and / or insulating material (52) between it and the electrical connector (30).

6. The battery device (80) according to claim 1, characterized in that, The battery device (80) includes a plurality of the constraint members (40), which are spaced apart along the extension direction of the side beam (111).

7. The battery device (80) according to claim 1, characterized in that, The bottom wall of the receiving groove (112) is provided with at least one group of ribs (60), each group of ribs (60) includes a plurality of ribs (61), and the extension direction of the plurality of ribs (61) is parallel to the extension direction of the side beam (111). The main body segment (31) is disposed between adjacent ribs (61) among the plurality of ribs (61), and / or the main body segment (31) is disposed between the ribs (61) and the sidewall of the receiving groove (112).

8. The battery device (80) according to claim 7, characterized in that, Also includes: A reinforcing beam (70) is provided in the accommodating space, and a connecting part (71) is provided at one end of the reinforcing beam (70), and the connecting part (71) is fixedly connected to the accommodating groove (112); The bottom wall of the receiving groove (112) is provided with a plurality of rib groups (60), and there is a gap between adjacent rib groups (60). The projection of the connecting part (71) and the rib group (60) on the bottom wall of the receiving groove (112) does not coincide.

9. The battery device (80) according to claim 8, characterized in that, The main body segment (31) includes: The fixing part (311) is supported by the rib group (60); and The clearance portion (312) is disposed between adjacent rib groups (60), and the projections of the clearance portion (312) and the connecting portion (71) on the bottom wall of the receiving groove (112) do not coincide.

10. An electrical appliance, characterized in that, Includes the battery device (80) as described in any one of claims 1-9.

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