Battery device, electric equipment and energy storage equipment

Abstract

The utility model discloses a battery device, electric equipment and energy storage equipment. The battery device comprises a battery monomer assembly, a box body, a sampling circuit board and a connector, the battery cell assembly comprises a plurality of battery cells arranged along a first direction; an accommodating space is formed in the box body, and the battery monomer assembly is positioned in the accommodating space; the sampling circuit board is positioned in the accommodating space and is arranged on one side of the battery monomer assembly, the sampling circuit board comprises a first sampling circuit board and a second sampling circuit board, and the first sampling circuit board and the second sampling circuit board are laminated and are in insulated connection; the first sampling circuit board and the second sampling circuit board are provided with first pins and second pins in one-to-one correspondence along the same side of the second direction. Connecting pins are arranged on one side of the connector and comprise the first connecting pin and the second connecting pin, the first connecting pin and the second connecting pin are arranged in an insulated mode, the first connecting pin is electrically connected with the first pin, and the second connecting pin is electrically connected with the second pin.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery device, an electrical device, and an energy storage device. Background Technology

[0002] To monitor the battery's operating status, a sampling circuit board is typically set up to collect battery operating parameters such as voltage and current. The sampling circuit board needs to be connected to the battery's connector. When there are multiple sampling circuit boards, each one needs to be connected to the connector one by one, which results in low installation efficiency. Utility Model Content

[0003] In view of the above problems, this application provides a battery device that integrates a first sampling circuit board and a second sampling circuit board together, reducing the operation steps of connecting it with the connector, thereby improving installation efficiency.

[0004] In a first aspect, this application provides a battery device, comprising:

[0005] A battery cell assembly, comprising a plurality of battery cells arranged along a first direction;

[0006] The housing has an internal storage space where the individual battery cells are located.

[0007] A sampling circuit board is located within the accommodating space and disposed on one side of the battery cell assembly. The sampling circuit board has a first pin and a second pin respectively on the same side along the second direction. The sampling circuit board includes a first sampling circuit board and a second sampling circuit board. The first sampling circuit board and the second sampling circuit board are stacked and insulatedly connected. The first sampling circuit board has a first pin and the second sampling circuit board has a second pin. The second direction is the same as the thickness direction of the sampling circuit board and intersects with the first direction.

[0008] The connector has a first connection pin and a second connection pin on one side. The first connection pin and the second connection pin are insulated from each other. The first connection pin and the first pin are electrically connected, and the second connection pin and the second pin are electrically connected.

[0009] The first sampling circuit board and the second sampling circuit board are insulated from each other and stacked to form an integral structure. The first pin and the second pin are located on the same side in the second direction. When the sampling circuit board is connected to the connector, the first sampling circuit board and the second sampling circuit board can be treated as a whole. At the same time, the first pin is electrically connected to the first connection pin and the second pin is electrically connected to the second connection pin. Compared with the traditional method of connecting the sampling circuit board to the connector one by one, the installation efficiency can be improved.

[0010] In some embodiments, there are multiple first pins and multiple second pins, with multiple first pins spaced apart along a third direction, multiple second pins spaced apart along a third direction, and the first pins and second pins spaced apart along a first direction. Each first pin has a first connection portion, and each second pin has a second connection portion. Each first pin is electrically connected to a first connection portion, and each second pin is electrically connected to a second connection portion. The plane containing both the first and second directions intersects with the third direction.

[0011] The first pin and the second pin are spaced apart along a first direction, so that the first connecting pin and the second connecting pin of the connector are arranged spaced apart along the first direction to facilitate the electrical connection between the first pin and the first connecting pin, and the electrical connection between the second pin and the second connecting pin.

[0012] In some embodiments, a second pin is provided between two adjacent first pins along a third direction, and a second connection pin is provided between two adjacent first connection pins.

[0013] Therefore, the spacing between the first and second pins along a third direction can be increased to reduce the possibility of short circuits caused by simultaneously soldering the first and second pins to the same first or second connection pin; at the same time, it facilitates soldering.

[0014] In some embodiments, the first pin and the second pin are arranged in a rectangular array.

[0015] The rectangular array arrangement makes the arrangement of the first and second pins more regular and orderly. When connecting to the corresponding pins of the connector, it is convenient for installers to quickly and accurately find the corresponding connection points, improving the accuracy and efficiency of the connection, and also facilitating subsequent inspection and maintenance.

[0016] In some embodiments, the connector includes a body and a protective member. The body has a receiving cavity, at least a portion of a first connecting pin and at least a portion of a second connecting pin are located within the receiving cavity, and the body has a mounting port communicating with the receiving cavity along a second direction. The protective member covers the mounting port and is connected to the body.

[0017] The protective cover is placed at the mounting port to protect the connector pins and the pins of the sampling circuit board, thereby reducing the possibility of short circuits and improving the reliability of the battery device.

[0018] In some embodiments, the connector further includes a support member located on the side of the sampling circuit board away from the protective member, the support member being connected to the body portion and abutting against the sampling circuit board.

[0019] During the soldering process, the support can provide support for the sampling circuit board, keeping the first pin in electrical contact with the first connecting pin and the second pin in electrical contact with the second connecting pin, so as to facilitate the soldering operation. At the same time, after the soldering operation is completed, glue needs to be applied to the soldering position for protection. The support can support a certain amount of glue to reduce the glue flowing out to the outside.

[0020] In some embodiments, the support member is snapped into the body portion.

[0021] This allows for quick assembly and disassembly of the support components and the main body, facilitating operation.

[0022] In some embodiments, the battery device further includes a busbar, wherein each battery cell has an electrode terminal on the side facing the sampling circuit board, the busbar is electrically connected to the electrode terminals of different battery cells, and the sampling circuit board is electrically connected to the busbar.

[0023] The sampling circuit board is electrically connected to the busbar, which facilitates the sampling circuit board to collect the operating parameters (such as voltage and current) of the battery cells. By collecting the parameters at the busbar, the overall operating status of the battery cells can be more accurately reflected, providing reliable data support for the monitoring and management of the battery device.

[0024] In some embodiments, the first pin is soldered to the first connection pin; and / or, the second pin is soldered to the second connection pin.

[0025] Soldering can increase the connection strength between pins to maintain the reliability of the electrical connection.

[0026] In some embodiments, the sampling circuit board further includes an adhesive layer, and the first sampling circuit board and the second sampling circuit board are bonded together by the adhesive layer.

[0027] Therefore, an insulating connection between the first sampling circuit board and the second sampling circuit board can be easily and reliably achieved.

[0028] In some embodiments, the first sampling circuit board is provided with a first positioning hole, and the second sampling circuit board is provided with a second positioning hole, the first positioning hole and the second positioning hole are spaced apart along a first direction.

[0029] The first positioning hole and the second positioning hole can be used to cooperate with the positioning fixture to improve the positioning accuracy of the relative position of the first sampling circuit board and the second sampling circuit board. When the first sampling circuit board and the second sampling circuit board are connected to the connector, the accuracy of the connection position of the first pin and the second pin is improved.

[0030] Secondly, this application provides an electrical device, including the battery device of the first aspect, which is used to provide electrical energy to the electrical device.

[0031] Since the electrical equipment includes all the technical features of the battery device in the first aspect, and its effect is the same as described above, it will not be repeated here.

[0032] Thirdly, this application provides an energy storage device, including a cabinet and at least one battery cluster, the battery cluster being housed within the cabinet, the battery cluster including a plurality of battery devices according to the first aspect.

[0033] Since the energy storage device includes all the technical features of the battery device in the first aspect, and its effect is the same as described above, it will not be repeated here.

[0034] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 This is an exploded view of a battery device according to an embodiment of this application;

[0037] Figure 2 This is an exploded view of the connection between the sampling circuit board and the connector in a battery device according to an embodiment of this application;

[0038] Figure 3 This is a partial isometric view of the connection between the sampling circuit board and the connector in a battery device according to an embodiment of this application;

[0039] Figure 4 This is an isometric view of a connector in a battery device according to an embodiment of this application;

[0040] Figure 5 This is a structural diagram of the sampling circuit board and connector in a battery device according to the first embodiment of this application;

[0041] Figure 6 This is a structural diagram of a sampling circuit board and connector in a battery device according to a second embodiment of this application;

[0042] Figure 7 This is a structural diagram of an electrical device for a vehicle according to an embodiment of this application;

[0043] Figure 8This is an isometric view of an energy storage device according to an embodiment of this application.

[0044] The reference numerals in the detailed embodiments are as follows:

[0045] 1000, vehicle; 200, controller; 300, motor;

[0046] 100. Battery device;

[0047] 10. Battery cell assembly; 11. Battery cell; 111. Electrode terminals;

[0048] 20. Box body;

[0049] 30. Sampling circuit board; 31. First sampling circuit board; 311. First pin; 312. First positioning hole; 32. Second sampling circuit board; 321. Second pin; 322. Second positioning hole; 33. Adhesive layer;

[0050] 40. Connector; 41. Body; 411. First connecting pin; 4111. First connecting part; 412. Second connecting pin; 4121. Second connecting part; 413. Snap-fit ​​hole; 42. Protective component; 43. Support component; 431. Snap-fit ​​part;

[0051] 50. Busbar;

[0052] 2000, Energy storage equipment; 2100, Cabinet; 2200, Battery cluster;

[0053] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0054] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0056] In the description of the embodiments of this application, 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 specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0057] 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 application. 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.

[0058] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0059] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0060] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0061] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0062] To monitor the battery's operating status, a sampling circuit board is typically set up to collect battery operating parameters such as voltage and current. The sampling circuit board needs to be connected to the battery's connector. When there are multiple sampling circuit boards, each one needs to be connected to the connector one by one, which results in low installation efficiency.

[0063] In view of this, this application provides a battery device in which a first sampling circuit board and a second sampling circuit board are insulatedly connected and stacked to form an integral structure, and the first pin and the second pin are located on the same side in a second direction. When the sampling circuit board is connected to the connector, the first sampling circuit board and the second sampling circuit board can be treated as a whole, and the first pin is electrically connected to the first connection pin and the second pin is electrically connected to the second connection pin. Compared with the traditional method of connecting the sampling circuit board to the connector one by one, the installation efficiency can be improved.

[0064] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0065] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0066] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0067] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0068] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0069] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0070] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to house the battery cell assembly.

[0071] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0072] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0073] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices, such as electric vehicles, cars, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0074] In some embodiments, a battery cell 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.

[0075] The battery cell 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 the embodiments of this application are not limited to this.

[0076] A single battery cell 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 a single battery cell, 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 while allowing active ions to pass through.

[0077] In some embodiments, the positive electrode may 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.

[0078] 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.

[0079] 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. A composite current collector may include a polymer base layer and a metal layer. A composite current collector can be formed by forming metallic materials such as aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys on a polymer base material such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene.

[0080] 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 application 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 can also be abbreviated as NCM 333 LiNi 0.5 Co 0.2 Mn 0.3 O2 can also be abbreviated as NCM 523 LiNi 0.5 Co 0.25 Mn 0.25 O2 can also be abbreviated as NCM 211 LiNi 0.6 Co 0.2 Mn 0.2 O2 can also be abbreviated as NCM 622 LiNi 0.8 Co 0.1 Mn 0.1 O2 can also be abbreviated as NCM 811 Lithium nickel cobalt aluminum oxides such as LiNi 0.8 Co 0.15 Al 0.05 At 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.

[0081] In some embodiments, the positive 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 positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, a positive electrode active material is filled and / or deposited within the foamed metal.

[0082] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0083] 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. A composite current collector may include a polymer material substrate and a metal layer. A composite current collector can be formed by forming metal materials such as copper, copper alloys, nickel, nickel alloys, titanium, titanium alloys, silver, and silver alloys on a polymer material substrate such as polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, or polyethylene.

[0084] 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.

[0085] 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.

[0086] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in battery cells. 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 application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for battery cells may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0087] 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.

[0088] As an example, negative electrode active materials can be filled or / and deposited within the negative electrode current collector.

[0089] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0090] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0091] In some embodiments, the separator is a separator membrane. This application 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.

[0092] 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.

[0093] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0094] In some embodiments, the battery cell further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application does not impose specific limitations on the type of electrolyte; it can be selected according to requirements. The electrolyte can be liquid, gel, or solid.

[0095] Liquid electrolytes include electrolyte salts and solvents.

[0096] 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.

[0097] 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.

[0098] 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, such as additives that improve the overcharge / fast charge performance of the battery cell, additives that improve the high-temperature performance of the battery cell, and additives that improve the low-temperature performance of the battery cell.

[0099] The gel electrolyte includes a polymer as a backbone network and can be used in conjunction with an ionic liquid-lithium salt.

[0100] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0101] As an example, the polymers of polymeric solid electrolytes may include polyether polyethylene oxide, polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids, cellulose, etc.

[0102] As an example, inorganic solid electrolytes can be one or more of the following: oxide solid electrolytes, crystalline perovskite, sodium superconducting ion conductors, garnet, amorphous LiPON thin films, sulfide solid electrolytes, crystalline lithium superconducting ion conductors, lithium germanium phosphate sulfide, silver sulfide, amorphous sulfides, halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0103] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0104] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0105] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0106] In some embodiments, the electrode assembly has a stacked structure.

[0107] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0108] 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.

[0109] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0110] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0111] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0112] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal, etc.

[0113] In some embodiments, the electrode assembly has tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0114] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing such as polypropylene, or a composite metal casing such as a copper-aluminum composite casing. In some embodiments, the casing may be a sealed structure or a non-sealed structure.

[0115] As an example, the battery cell can be a cylindrical battery cell, a prismatic 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 application does not have any particular limitations.

[0116] 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 be provided with one or more.

[0117] 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.

[0118] In some embodiments, a pressure relief mechanism is provided on the housing. The pressure relief mechanism is used to release the internal gas of the battery cell.

[0119] As an example, the internal pressure or temperature of a battery cell 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 reaches the predetermined threshold, the pressure relief mechanism is activated or a weak structure in the pressure relief mechanism is broken, thereby creating 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.

[0120] As an example, the pressure relief mechanism can be integrally molded with the housing.

[0121] As an example, the pressure relief mechanism can also be separately installed and connected to the housing.

[0122] The term "actuation" as used in this application refers to the activation or actuation of the pressure relief mechanism to a certain state, thereby releasing the internal pressure and temperature of the battery cell. The actions of the pressure relief mechanism may include, but are not limited to: movement of components within the mechanism to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the mechanism, etc. When the pressure relief mechanism is activated, the high-temperature, high-pressure substances inside the battery cell are discharged as waste from the activated portion. This method allows for pressure and temperature relief of the battery cell under controllable pressure or temperature, thereby preventing potentially more serious accidents.

[0123] In some embodiments, when the housing is a non-sealed structure, the pressure relief mechanism can be configured as a through hole for venting gas inside the battery cell.

[0124] The emissions from battery cells mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0125] For ease of explanation, please refer to the following embodiments. Figures 1-6 The following description will be based on a battery device 100 according to some embodiments of this application.

[0126] The battery device 100 includes a battery cell assembly 10, a housing 20, a sampling circuit board 30, and a connector 40. The battery cell assembly 10 includes a plurality of battery cells 11 arranged along a first direction X. The housing 20 has an internal receiving space, within which the battery cell assembly 10 is located. The sampling circuit board 30 is located within the receiving space and disposed on one side of the battery cell assembly 10. The sampling circuit board 30 has a first pin 31 and a second pin 32 on the same side along a second direction Y. The sampling circuit board 30 includes a first sampling circuit board 31 and a second sampling circuit board 32, which are stacked and insulated from each other. The first sampling circuit board 31 has a first pin 311, and the second sampling circuit board 32 has a second pin 321. The second direction Y is the same as the thickness direction of the sampling circuit board 30 and intersects the first direction X. The connector 40 has a first connection pin 411 and a second connection pin 412 on one side. The first connection pin 411 and the second connection pin 412 are insulated from each other. The first connection pin 411 and the first pin 311 are electrically connected, and the second connection pin 412 and the second pin 321 are electrically connected.

[0127] The first sampling circuit board 31 can collect the operating parameters (voltage, current, etc.) of a portion of the battery cells 11, and the second sampling circuit board 32 can collect the operating parameters (voltage, current, etc.) of another portion of the battery cells 11.

[0128] The first sampling circuit board 31 and the second sampling circuit board 32 can be fixed together by means of adhesive bonding or screw connection. The first sampling circuit board 31 and the second sampling circuit board 32 can be manufactured using multilayer printed circuit board (PCB) technology, or they can be made using flexible substrate to form FPC (Flexible Printed Circuit), or they can be signal acquisition board assemblies of FCC (Flexible flat cable connect flexible die-cut circuit).

[0129] The first pin 311, the second pin 321, the first connecting pin 411, and the second connecting pin 412 can all be made of copper or copper alloys with good conductivity.

[0130] As an example, connector 40 may be provided with a slot, in which a first connection pin 411 and a second connection pin 412 are provided, and sampling circuit board 30 can be plugged into the slot. In other examples, the first connection pin 411 and the first pin 311 of connector 40, as well as the second connection pin 412 and the second pin 321, are connected and fixed by laser welding.

[0131] The first sampling circuit board 31 and the second sampling circuit board 32 are insulated from each other and stacked to form an integral structure. The first pin 311 and the second pin 321 are located on the same side of the second direction Y. When the sampling circuit board 30 is connected to the connector 40, the first sampling circuit board 31 and the second sampling circuit board 32 can be treated as a whole. At the same time, the first pin 311 is electrically connected to the first connection pin 411, and the second pin 321 is electrically connected to the second connection pin 412. Compared with the traditional method of connecting the sampling circuit board 30 to the connector 40 one by one, the installation efficiency can be improved.

[0132] In some embodiments, please refer to Figures 2-6 The number of first pins 311 and the number of second pins 321 are both multiple. The multiple first pins 311 are spaced apart along the third direction Z. The multiple second pins 321 are spaced apart along the third direction Z. The first pins 311 and the second pins 321 are spaced apart along the first direction X. The first connecting pin 411 has a first connecting portion 4111. The second connecting pin 412 has a second connecting portion 4121. Each first pin 311 is electrically connected to a first connecting portion 4111. Each second pin 321 is electrically connected to a second connecting portion 4121. The plane containing the first direction X and the second direction Y intersects with the third direction Z.

[0133] The first pin 311 and the second pin 321 can be staggered or arranged in parallel along the third direction Z. The first connecting pin 411 and the second connecting pin 412 can be staggered or arranged in parallel along the third direction Z.

[0134] The first pin 311 and the second pin 321 are spaced apart along the first direction X, so that the first connection pin 411 and the second connection pin 412 of the connector 40 are spaced apart along the first direction X, so as to facilitate the electrical connection between the first pin 311 and the first connection pin 411, and the electrical connection between the second pin 321 and the second connection pin 412.

[0135] In some embodiments, please refer to Figure 5 Along the third direction Z, a second pin 321 is provided between two adjacent first pins 311, and a second connection pin 412 is provided between two adjacent first connection pins 411.

[0136] The second pin 321 between two adjacent first pins 311 can be one or more, or some adjacent first pins 311 may have a second pin 321 between them, while other adjacent first pins 311 may not have a second pin 321 between them. The figure illustrates that the number of second pins 321 between any two adjacent first pins 311 is one.

[0137] Therefore, the spacing between the first pin 311 and the second pin 321 along the third direction Z can be increased to reduce the possibility of short circuits caused by simultaneously soldering the first pin 311 and the second pin 321 to the same first connecting pin 411 or the same second connecting pin 412; at the same time, soldering is more convenient. Along the third direction Z, there can be one, multiple, or partial second connecting pins 412 between any two adjacent first connecting pins 411. The figure illustrates that any two adjacent first connecting pins 411 are connected by one second connecting pin 412.

[0138] Therefore, the first connection pin 411 and the second connection pin 412 can be staggered to increase the soldering space and facilitate the soldering operation.

[0139] In some embodiments, please refer to Figure 6 The first pin 311 and the second pin 321 are arranged in a rectangular array.

[0140] exist Figure 6 In the middle, the first connection portion 4111 of the first connection pin 411 and the second connection portion 4121 of the second connection pin 412 are arranged in a rectangular array.

[0141] The rectangular array arrangement makes the arrangement of the first pin 311 and the second pin 321 more regular and orderly. When connecting to the corresponding pins of the connector 40, it is convenient for installers to quickly and accurately find the corresponding connection points, improving the accuracy and efficiency of the connection, and also facilitating subsequent inspection and maintenance.

[0142] In some embodiments, please refer to Figure 2 The connector 40 includes a body portion 41 and a protective member 42. The body portion 41 has a receiving cavity, and at least a portion of the first connecting pin 411 and at least a portion of the second connecting pin 412 are located in the receiving cavity. Along the second direction Y, the body portion 41 has a mounting port communicating with the receiving cavity. The protective member 42 covers the mounting port and is connected to the body portion 41.

[0143] The connection between the main body 41 and the protective component 42 includes, but is not limited to, screw connection, adhesive bonding, or snap-fit ​​connection. The protective component 42 can be a protective cover or a protective cap. The protective component 42 covers the mounting port and can protect the connection pins of the connector 40 and the pins of the sampling circuit board 30 to reduce the occurrence of short circuits and improve the reliability of the battery device 100.

[0144] In some embodiments, please refer to Figure 2 The connector 40 also includes a support member 43, which is located on the side of the sampling circuit board 30 away from the protective member 42. The support member 43 is connected to the main body 41 and abuts against the sampling circuit board 30.

[0145] The support member 43 can be a support plate or a cover structure, and the support member 43 can be made of plastic.

[0146] During the welding process, the support 43 can provide support for the sampling circuit board 30, so that the first pin 311 and the first connecting pin 411 are in electrical contact, and the second pin 321 and the second connecting pin 412 are in electrical contact, so as to facilitate the welding operation. At the same time, after the welding operation is completed, glue needs to be applied to the welding position for protection. The support 43 can support a certain amount of glue to reduce the glue from flowing out to the outside.

[0147] In some embodiments, the support member 43 is snapped into the body portion 41.

[0148] As an example, the support member 43 has a snap-fit ​​portion 431 on the side facing the body portion 41, and the body portion 41 has a snap-fit ​​hole 413 on the side facing the support member 43. The snap-fit ​​portion 431 snaps into the snap-fit ​​hole 413. The number of snap-fit ​​portions 431 and snap-fit ​​portions 413 can be multiple to improve the reliability of the connection.

[0149] This allows for quick assembly and disassembly of the support member 43 and the main body 41, facilitating operation.

[0150] In some embodiments, please refer to Figure 1 The battery device 100 also includes a busbar 50. Each battery cell 11 has an electrode terminal 111 on the side facing the sampling circuit board 30. The busbar 50 is electrically connected to the electrode terminals 111 of different battery cells 11. The sampling circuit board 30 is electrically connected to the busbar 50.

[0151] The busbar 50 can be electrically connected to the electrode terminals 111 of two adjacent battery cells 11. When there are three or more battery cells 11, the busbar 50 can also be electrically connected to the electrode terminals 111 of two spaced-apart battery cells 11. The sampling circuit board 30 and the busbar 50 can be electrically connected by soldering.

[0152] The sampling circuit board 30 is electrically connected to the busbar 50, which facilitates the sampling circuit board 30 to collect the operating parameters (such as voltage and current) of the battery cell assembly 10. By collecting the parameters at the busbar 50, the overall operating status of the battery cell assembly 10 can be more accurately reflected, providing reliable data support for the monitoring and management of the battery device 100.

[0153] In some embodiments, the first pin 311 is soldered to the first connection pin 411, and the second pin 321 and the second connection pin 412 are soldered together. Soldering increases the connection strength between the pins to maintain the reliability of the electrical connection. In some embodiments, the sampling circuit board 30 further includes an adhesive layer 33, which bonds the first sampling circuit board 31 and the second sampling circuit board 32 together. This allows for a convenient and reliable insulating connection between the first sampling circuit board 31 and the second sampling circuit board 32.

[0154] In some embodiments, please refer to Figure 3 The first sampling circuit board 31 is provided with a first positioning hole 312, and the second sampling circuit board 32 is provided with a second positioning hole 322. The first positioning hole 312 and the second positioning hole 322 are spaced apart along the first direction X.

[0155] The first positioning hole 312 and the second positioning hole 322 include, but are not limited to, circular, elliptical, or square shapes.

[0156] The first positioning hole 312 and the second positioning hole 322 can be respectively engaged with different positioning pins of the positioning fixture to reduce the possibility of misalignment of the first pin 311 and the second pin 321 during welding and improve the accuracy of welding.

[0157] The first positioning hole 312 and the second positioning hole 322 can be used to cooperate with the positioning fixture to improve the positioning accuracy of the relative position of the first sampling circuit board 31 and the second sampling circuit board 32. When the first sampling circuit board 31 and the second sampling circuit board 32 are respectively connected to the connector 40, the accuracy of the connection position of the first pin 311 and the second pin 321 is improved.

[0158] For ease of explanation, the following embodiments use an electrical device from some embodiments of this application as an example. The electrical device includes the battery device 100 described above, which provides electrical energy to the electrical device. The electrical device can be, but is not limited to, electric vehicles, power tools, vehicles 1000, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft. Figure 7 This is a schematic diagram of the structure of a vehicle 1000, used as an electrical device in some embodiments of this application. 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. A battery device 100 is installed inside the vehicle 1000, and 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 supply power to 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. Since the electrical device includes all the technical features of the battery device 100 in the above embodiments, its effects are the same as described above, and will not be repeated here.

[0159] For ease of explanation, please refer to the following examples. Figure 8 The following description will be based on an energy storage device 2000 according to some embodiments of this application.

[0160] The energy storage device 2000 includes a cabinet 2100 and at least one battery cluster 2200, which is housed within the cabinet 2100. The battery cluster 2200 includes a plurality of battery devices 100 as described in the above embodiments.

[0161] Battery clusters 2200 can increase the voltage and capacity of energy storage device 2000. Battery clusters 2200 may include multiple battery devices 100. Multiple battery devices 100 are connected in series via a busbar to increase the voltage of energy storage device 2000. When energy storage device 2000 includes multiple battery clusters 2200, the multiple battery clusters 2200 are connected in parallel to increase the capacity of energy storage device 2000. Energy storage device 2000 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. Energy storage device 2000 can store electrical energy as needed and output electrical energy when appropriate. For example, energy storage device 2000 can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the use of energy storage device 2000.

[0162] Since the energy storage device 2000 includes all the technical features of the battery device 100 in the above embodiments, and has the same effect as described above, it will not be repeated here.

[0163] In an alternative embodiment of the battery device, please refer to Figures 1-5The battery device 100 includes a battery cell assembly 10, a housing 20, a busbar 50, a sampling circuit board 30, and a connector 40. The battery cell assembly 10 includes multiple battery cells 11 arranged along a first direction X. The housing 20 has an internal receiving space, within which the battery cell assembly 10 is located. The sampling circuit board 30 is located within the receiving space and disposed on one side of the battery cell assembly 10. The sampling circuit board 30 has first pins 31 and second pins 32 on the same side along a second direction Y. The sampling circuit board 30 includes a first sampling circuit board 31, a second sampling circuit board 32, and an adhesive layer 33. The first sampling circuit board 31 and the second sampling circuit board 32 are stacked and bonded together with insulation by the adhesive layer 33. The first sampling circuit board 31 has first pins 311, and the second sampling circuit board 32 has second pins 321. The second direction Y is the same as the thickness direction of the sampling circuit board 30 and intersects the first direction X. The multiple first pins 311 are spaced apart along a third direction Z, and the multiple second pins 321 are spaced apart along the third direction Z. First pins 311 and second pins 321 are spaced apart along a first direction X. A first connecting pin 411 and a second connecting pin 412 are respectively provided on one side of the connector 40, and the first connecting pins 411 and the second connecting pins 412 are insulated from each other. The first connecting pin 411 has a first connecting portion 4111, and the second connecting pin 412 has a second connecting portion 4121. Each first pin 311 is electrically connected to one first connecting portion 4111, and each second pin 321 is electrically connected to one second connecting portion 4121. The plane containing both the first direction X and the second direction Y intersects with a third direction Z. Along the third direction Z, a second pin 321 is provided between two adjacent first pins 311. Along the third direction Z, a second connecting pin 412 is provided between two adjacent first connecting pins 411. The connector 40 includes a body portion 41, a support member 43, and a protective member 42. The body portion 41 has a receiving cavity, in which at least a portion of the first connecting pin 411 and at least a portion of the second connecting pin 412 are located. Along the second direction Y, the body portion 41 has a mounting opening communicating with the receiving cavity. A protective member 42 covers the mounting opening and is connected to the body portion 41. A support member 43 is located on the side of the sampling circuit board 30 opposite to the protective member 42. The support member 43 snaps into the body portion 41 and abuts against the sampling circuit board 30. The busbar 50 is electrically connected to the electrode terminals 111 of different battery cells 11, and the sampling circuit board 30 is electrically connected to the busbar 50. The first pin 311 is soldered to the first connecting pin 411, and the second pin 321 and the second connecting pin 412 are soldered together.

[0164] The first sampling circuit board 31 and the second sampling circuit board 32 have corresponding first pins 311 and second pins 321 on the same side along the second direction Y, which facilitates soldering with the connector 40 and improves installation efficiency. Meanwhile, along the third direction Z, a second pin 321 is provided between two adjacent first pins 311, and a second connecting pin 412 is provided between two adjacent first connecting pins 411, which can reduce the possibility of short circuits between pins. The protective component 42 and the support component 43 can protect each pin, and the support component 43 can also provide support during soldering to facilitate soldering.

[0165] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application 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. These 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 application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, include: A battery cell assembly, comprising a plurality of battery cells arranged along a first direction; The housing has an internal storage space, and the battery cell assembly is located within the storage space. A sampling circuit board is located within the accommodating space and disposed on one side of the battery cell assembly. The sampling circuit board has a first pin and a second pin respectively on the same side along the second direction. The sampling circuit board includes a first sampling circuit board and a second sampling circuit board. The first sampling circuit board and the second sampling circuit board are stacked and insulatedly connected. The first sampling circuit board has the first pin, and the second sampling circuit board has the second pin. The second direction is the same as the thickness direction of the sampling circuit board and intersects with the first direction. The connector has a first connection pin and a second connection pin on one side, the first connection pin and the second connection pin are insulated from each other, the first connection pin and the first pin are electrically connected, and the second connection pin and the second pin are electrically connected.

2. The battery device according to claim 1, characterized in that, The number of first pins and the number of second pins are both multiple. The multiple first pins are spaced apart along a third direction, and the multiple second pins are spaced apart along a third direction. The first pins and the second pins are spaced apart along the first direction. The first connecting pin has a first connecting portion, and the second connecting pin has a second connecting portion. Each first pin is electrically connected to a first connecting portion, and each second pin is electrically connected to a second connecting portion. The plane where the first direction and the second direction are located intersects with the third direction.

3. The battery device of claim 2, wherein, Along the third direction, the first pin is provided between two adjacent second pins, and the first connection pin and the second connection pin are spaced apart.

4. The battery device of claim 2, wherein The first pin and the second pin are arranged in a rectangular array.

5. The battery device according to any one of claims 1 to 4, characterized by, The connector includes a body and a protective member. The body has a receiving cavity, in which at least a portion of the first connecting pin and at least a portion of the second connecting pin are located. Along the second direction, the body has a mounting port communicating with the receiving cavity. The protective member covers the mounting port and is connected to the body.

6. The battery device of claim 5, wherein, The connector also includes a support member located on the side of the sampling circuit board away from the protective member. The support member is connected to the main body and abuts against the sampling circuit board.

7. The battery device of claim 6, wherein The support member is engaged with the main body.

8. The battery device according to any one of claims 1 to 4, wherein The battery device also includes a busbar, and each battery cell has an electrode terminal on the side facing the sampling circuit board. The busbar is electrically connected to the electrode terminals of different battery cells, and the sampling circuit board is electrically connected to the busbar.

9. The battery device according to any one of claims 1-4, characterized in that, The first pin is soldered to the first connection pin; and / or, the second pin is soldered to the second connection pin.

10. The battery device according to any one of claims 1 to 4, wherein The sampling circuit board also includes an adhesive layer, through which the first sampling circuit board and the second sampling circuit board are bonded together.

11. The battery device according to any one of claims 1 to 4, wherein The first sampling circuit board is provided with a first positioning hole, and the second sampling circuit board is provided with a second positioning hole. The first positioning hole and the second positioning hole are spaced apart along the first direction.

12. An electrical device, characterized by Includes the battery device as described in any one of claims 1-11, the battery device being used to provide electrical energy to the electrical equipment.

13. An energy storage device, comprising: It includes a cabinet and at least one battery cluster, the battery cluster being housed within the cabinet, the battery cluster comprising a plurality of battery devices as described in any one of claims 1-11.

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