Battery and electric device

Abstract

A battery and an electric device. The battery (10) is provided with a plurality of sampling positions, and the battery comprises a sampling structure (12). The sampling structure (12) comprises: a sampling circuit board (20), comprising at least two layers of circuit board sections (21) in a folded state; and a plurality of sampling terminals (30), adapted to be electrically connected to the sampling positions of the battery (10), respectively. The plurality of sampling terminals (30) include at least two groups of sampling terminals (30) electrically connected to the at least two layers of circuit board sections (21), respectively.

Description

Battery and electric device Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202410543858.6, filed on April 30, 2024, entitled “Battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of batteries, and in particular to a battery and an electric device. BACKGROUND

[0003] Secondary batteries, especially lithium ion batteries, have the advantages of high voltage, large specific energy, long cycle life, green and pollution-free, wide working temperature range, and small self-discharge, and are widely used in portable electronic devices and large new energy electric vehicles. It has great significance to solve the environmental pollution and energy crisis of human beings. With the wide application of lithium ion batteries, battery reliability has become a problem that producers are closely concerned about. SUMMARY

[0004] In one aspect of the present disclosure, a battery having a plurality of sampling positions is provided, the battery comprising a sampling structure, wherein the sampling structure comprises: a sampling circuit board comprising at least two layers of circuit board segments in a folded state; and a plurality of sampling terminals for respectively electrically connecting to each sampling position of the battery; wherein the plurality of sampling terminals comprises at least two groups of sampling terminals electrically connected to the at least two layers of circuit board segments, respectively.

[0005] In the present embodiment, the sampling circuit board comprises at least two layers of circuit board segments in a folded state, and the at least two layers of circuit board segments are electrically connected to at least two groups of sampling terminals in the plurality of sampling terminals electrically connected to each sampling position of the battery, respectively. This can enable the sampling circuit board to connect more sampling terminals under limited size, meet the wiring requirements of more sampling points of the battery, and improve the wiring utilization of the sampling circuit board in limited space. Moreover, the layers of circuit board segments in the folded sampling circuit board can be connected through the lines on the sampling circuit board, without relying on external lines outside the sampling circuit board or setting conductive channels between the vias of adjacent layers of circuit board, thereby facilitating reduction of line complexity, improvement of signal transmission anti-interference, and reduction of circuit board design difficulty.

[0006] In some embodiments, the sampling circuit board has a flexible segment at the interlayer folding position of the adjacent two layers of circuit board segments.

[0007] In the embodiment, by arranging the flexible section at the interlayer folding position of the adjacent two layer circuit board sections, the stress concentration of the sampling circuit board during folding and in the folded state can be reduced, and the risk that the interlayer folding position of the sampling circuit board is damaged due to the failure to fold to a suitable angle and excessive bending stress can be reduced. In addition, the flexible section can also make the electrical connection of the lines arranged therein for connecting the adjacent two layer circuit board sections more reliable, and the risk of failure can be reduced.

[0008] In some embodiments, the sampling circuit board is a flexible circuit board.

[0009] In the embodiment, the sampling circuit board is arranged as a flexible circuit board, and the folding requirement between the multi-layer circuit board sections is met by the flexibility of the flexible circuit board itself, so that the utilization rate of the wiring of the sampling circuit board in the limited space is improved, and better design flexibility is achieved.

[0010] In some embodiments, the adjacent two layer circuit board sections in the at least two layer circuit board sections are adhesively fixed.

[0011] In the embodiment, the adjacent two layer circuit board sections are fixed by adhesion, so that the mutual positioning between the folded adjacent two layer circuit boards can be achieved, the connection reliability of the sampling circuit board is prevented from being affected by the misalignment, the adhesion process is relatively simple, the space occupied is relatively small, and the space occupation of the sampling structure can be reduced.

[0012] In some embodiments, the adjacent two layer circuit board sections are adhesively fixed by double-sided adhesive tape.

[0013] In the embodiment, the adjacent two layer circuit board sections are adhesively fixed by double-sided adhesive tape, so that a relatively stable and consistent adhesion effect can be obtained, and the operation and positioning are easy, which is beneficial to improve the production efficiency.

[0014] In some embodiments, the sampling structure further comprises a battery management system, and at least two electrical connectors arranged on the at least two layer circuit board sections, respectively, for electrically connecting the battery management system of the battery.

[0015] In the embodiment, the at least two electrical connectors arranged on the at least two layer circuit board sections, respectively, are used to electrically connect the battery management system of the battery, so that each layer circuit board section obtains sampling data from each sampling position of the battery through the sampling terminal, and provides the sampling data to the battery management system, so that the battery management system can monitor and control the state of the battery, thereby optimizing the performance of the battery and improving the reliability of the battery.

[0016] In some embodiments, the number of the at least two electrical connectors is the same as the number of the at least two layers of the circuit board segments, and the at least two electrical connectors correspond to the at least two layers of the circuit board segments one by one, and each electrical connector independently realizes electrical connection between the circuit in the corresponding layer of the circuit board segment and the battery management system of the battery.

[0017] In the present embodiment, one electrical connector is arranged for each layer of the circuit board segment to independently realize electrical connection between the circuit in the layer of the circuit board segment and the battery management system of the battery, so that the circuit board segments can be divided according to requirements to realize parameter sampling of different areas in the battery or sampling of different parameters in the battery, and the battery management system can also determine the circuit board segment corresponding to the electrical connector according to fault information reflected by the electrical connector, thereby facilitating fault positioning.

[0018] In some embodiments, the sampling circuit board is a flexible circuit board, and the sampling structure further comprises a reinforcing member fixed between adjacent two layers of the at least two layers of the circuit board segments, wherein the adjacent two layers of the circuit board segments are fixed with the reinforcing member to form reinforcing surfaces for mounting the at least two electrical connectors through regions adjacent to folding positions between the adjacent two layers of the circuit board segments.

[0019] In the present embodiment, for the flexible circuit board, the reinforcing member is fixed between the adjacent two layers of the circuit board segments to form the reinforcing surfaces for mounting the at least two electrical connectors, so that the fixing strength of the electrical connectors on the flexible circuit board can be improved, and the risk of loosening or falling off of the electrical connectors from the flexible circuit board during plugging and unplugging can be reduced.

[0020] In some embodiments, the reinforcing member has a plate-shaped portion, and opposite two plate surfaces of the plate-shaped portion are respectively bonded and fixed with the adjacent two layers of the circuit board segments.

[0021] In the present embodiment, the opposite two plate surfaces of the plate-shaped portion of the reinforcing member are respectively bonded and fixed with the adjacent two layers of the circuit board segments, so that flat reinforcing surfaces on opposite two sides of the adjacent two layers of the circuit board segments can be formed on two sides of the reinforcing member, the fixing of the electrical connectors is more stable, and the space occupation of the electrical connectors and the sampling circuit board in the thickness direction of the sampling circuit board can be reduced.

[0022] In some embodiments, the opposite two plate surfaces of the plate-shaped portion are respectively bonded with the adjacent two layers of the circuit board segments by double-sided adhesive.

[0023] In the present embodiment, the opposite two plate surfaces of the plate-shaped portion and the adjacent two layers of the circuit board segments are bonded by the double-sided adhesive, so that a relatively stable and consistent bonding effect can be obtained, and the operation and positioning are easy, which is beneficial to improve the production efficiency.

[0024] In some embodiments, the reinforcing member has a mounting portion for mounting within the battery.

[0025] In the present embodiment, the reinforcing member can be mounted within the battery through the mounting portion to satisfy the positioning of the reinforcing member and the flexible circuit board connected thereto, so that the flexible circuit board is not prone to dislocation to affect the connection reliability between the flexible circuit board and the sampling terminals.

[0026] In some embodiments, the at least two circuit board segments include a first circuit board segment and a second circuit board segment arranged adjacently, the at least two electrical connectors include a first electrical connector corresponding to the first circuit board segment and a second electrical connector corresponding to the second circuit board segment, the first electrical connector and the second electrical connector are located on opposite sides of the first circuit board segment and the second circuit board segment and arranged adjacent to the interlayer folding position of the first circuit board segment and the second circuit board segment.

[0027] In the present embodiment, the folded first circuit board segment and the second circuit board segment are respectively connected to the first electrical connector and the second electrical connector, and the first electrical connector and the second electrical connector are arranged on opposite sides of the first circuit board segment and the second circuit board segment and adjacent to the interlayer folding position, so that the first electrical connector and the second electrical connector are conveniently connected by lines at the interlayer folding position, and the length of the lines and the complexity of the arrangement are reduced.

[0028] In some embodiments, the sampling circuit board is a flexible circuit board, and the sampling structure further includes a reinforcing member fixed between the first circuit board segment and the second circuit board segment, wherein the reinforcing member is bonded to the first circuit board segment and the second circuit board segment adjacent to the regions of the interlayer folding position, respectively, so that the first circuit board segment and the second circuit board segment form a first reinforcing surface for mounting the first electrical connector and a second reinforcing surface for mounting the second electrical connector, respectively.

[0029] In the present embodiment, for the first electrical connector and the second electrical connector adjacent to the interlayer folding position, the first circuit board segment and the second circuit board segment adjacent to the regions of the interlayer folding position are bonded by the reinforcing member to form the first reinforcing surface for mounting the first electrical connector and the second reinforcing surface for mounting the second electrical connector, so that the first electrical connector and the second electrical connector can be more stably and reliably connected at the positions adjacent to the interlayer folding position.

[0030] In some embodiments, the plurality of sampling terminals comprises a first group of sampling terminals electrically connected to the first layer circuit board segment and a second group of sampling terminals electrically connected to the second layer circuit board segment, the first group of sampling terminals and the first electrical connector are located on the same side of the first layer circuit board segment, and the second group of sampling terminals and the second electrical connector are located on the same side of the second layer circuit board segment.

[0031] In the present embodiment, by locating the first group of sampling terminals and the first electrical connector on the same side of the first layer circuit board segment, and locating the second group of sampling terminals and the second electrical connector on the same side of the second layer circuit board segment, the first group of sampling terminals, the second group of sampling terminals, the first electrical connector and the second electrical connector can be arranged on one side surface of the flexible circuit board before folding, thereby facilitating the reduction of processing procedures and the reduction of processing difficulty. Moreover, the first group of sampling terminals and the second group of sampling terminals of the structure are not located between the first layer circuit board segment and the second layer circuit board segment, so that the first layer circuit board segment and the second layer circuit board segment are more flat when being bonded, and better bonding effect is achieved.

[0032] In some embodiments, the battery further comprises: a plurality of battery cells arranged at least in a first direction; and a plurality of busbars respectively electrically connected to the plurality of sampling terminals, and each busbar is respectively electrically connected to adjacent battery cells, wherein the first direction is parallel to the length direction of the sampling circuit board.

[0033] In the present embodiment, the length direction of the sampling circuit board is parallel to the arrangement direction of the plurality of battery cells, and the busbars for electrically connecting adjacent battery cells are connected through the sampling terminals, so that the busbars connected to each battery cell can be connected to the sampling terminals distributed in the length direction of the sampling circuit board, thereby forming a sufficient arrangement space for the sampling related lines on the sampling circuit board.

[0034] In some embodiments, the battery further comprises: a spacer located between the plurality of battery cells and the plurality of busbars, and having a through region for electrically connecting the plurality of battery cells and the plurality of busbars respectively; wherein the sampling circuit board is located on the side of the spacer away from the plurality of battery cells.

[0035] In the present embodiment, the spacer is arranged between the plurality of battery cells and the plurality of busbars, so that the sampling circuit board is separated from the battery cells through the spacer, and the plurality of battery cells and the plurality of busbars form electrical connection from the through region of the spacer, so that the sampling circuit board can obtain sampling signals from each battery cell through the busbars via the sampling terminals, and good insulation effect can be formed between the sampling circuit board and the battery cells, thereby reducing the risk of short circuit.

[0036] In one aspect of the present disclosure, a power consuming device is provided, comprising the aforementioned battery.

[0037] The power consuming device using the aforementioned battery is advantageous to achieve a better battery use effect. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings described below are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the drawings.

[0039] With reference to the drawings, the present disclosure can be more clearly understood according to the following detailed description, in which:

[0040] FIG. 1 is a structural schematic diagram of a power consuming device according to some embodiments of the present disclosure;

[0041] FIG. 2 is an exploded schematic diagram of a battery according to some embodiments of the present disclosure;

[0042] FIG. 3 is a schematic diagram of the installation structure of a battery monomer, a sampling structure and a spacer according to some embodiments of the present disclosure;

[0043] FIG. 4 is an exploded structural schematic diagram of FIG. 3;

[0044] FIG. 5 is a structural schematic diagram of a sampling structure according to some embodiments of the present disclosure in a perspective view along a third direction;

[0045] FIG. 6 is a local structural schematic diagram of a sampling structure according to some embodiments of the present disclosure in an unfolded state;

[0046] FIG. 7 is a structural schematic diagram of the sampling structure shown in FIG. 5 in a perspective view along a second direction;

[0047] FIG. 8 is an enlarged schematic diagram of circle A in FIG. 7;

[0048] FIG. 9 is a three-dimensional structural schematic diagram of a sampling structure according to some embodiments of the present disclosure;

[0049] FIG. 10 is an enlarged schematic diagram of circle B in FIG. 9.

[0050] It should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship. In addition, the same or similar reference numerals represent the same or similar components.

[0051] BRIEF DESCRIPTION OF DRAWINGS

[0052] 10 - battery; 11 - battery cell; 11p - electrode lead-out portion; 112 - busbar; 12 - sampling structure; 13 - spacer; 131 - through region; 14 - case; 15 - case lid;

[0053] 20 - sampling circuit board; 21 - circuit board segment; 211 - first layer circuit board segment; 212 - second layer circuit board segment; 21e - reinforcing surface; 21e1 - first reinforcing surface; 21e2 - second reinforcing surface; 22 - interlayer folding position; 22a - flexible segment; 23 - double-sided tape;

[0054] 30 - sampling terminal; 31 - first group of sampling terminals; 32 - second group of sampling terminals;

[0055] 40 - electrical connector; 41 - first electrical connector; 42 - second electrical connector;

[0056] 50 - reinforcing member; 51 - plate portion; 52 - mounting portion;

[0057] 60 - vehicle;

[0058] dr1 - first direction; dr2 - second direction; dr3 - third direction; BMS - battery management system. DETAILED DESCRIPTION

[0059] Embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings and examples. The detailed description and drawings of the following examples are intended to illustrate the principles of the present disclosure by way of example only and are not intended to limit the scope of the present disclosure, that is, the present disclosure is not limited to the described examples.

[0060] In the description of the present disclosure, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like is only for the purpose of facilitating the description of the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first", "second", "third" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable range of error. "Parallel" is not strictly parallel, but within the allowable range of error.

[0061] The orientation words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the present disclosure. In the description of the present disclosure, it should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0062] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0063] "Multiple" appearing in the present disclosure refers to two or more (including two).

[0064] In the embodiments of the present disclosure, the battery cell in the battery can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0065] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The present application is not limited thereto.

[0066] The battery cell includes an electrode assembly. The electrode assembly includes first and second polar plates with opposite polarities, and a separator disposed between the first and second polar plates. In some embodiments, the first polar plate is a positive polar plate, and the second polar plate is a negative polar plate. In other embodiments, the first polar plate is a negative polar plate, and the second polar plate is a positive polar plate. During charging and discharging of the battery cell, active ions (e.g., lithium ions) are inserted and extracted between the positive and negative polar plates. The separator is disposed between the positive and negative polar plates, which can prevent short circuiting of the positive and negative polar plates, while allowing the active ions to pass through.

[0067] In some embodiments, the positive polar plate can include a positive current collector substrate and a positive active material layer disposed on at least one surface of the positive current collector substrate.

[0068] As an example, the positive current collector substrate has two opposite surfaces in its own thickness direction, and the positive active material layer is disposed on either one or both of the two opposite surfaces of the positive current collector substrate.

[0069] As an example, the positive electrode current collector substrate can employ a metal foil or a composite current collector. For example, as a metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, etc. can be employed. The composite current collector can 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.) on a polymer material base substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0070] As an example, the positive electrode active material layer can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, the disclosure is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material layer can also be used. These positive electrode active material layers can be used alone only one or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (which can also be referred to as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and a composite material of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (which can also be referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2 (which can also be referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2 (which can also be referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2 (which can also be referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2 (which can also be referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2), and modified compounds thereof, etc.

[0071] In some embodiments, the negative electrode tab can include a negative electrode current collector substrate.

[0072] As an example, the negative electrode current collector substrate can employ a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, a carbon, nickel, or titanium, or the like can be employed. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, or the like. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by applying a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, or the like) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0073] In some embodiments, the negative electrode tab can include a negative electrode current collector substrate and a negative electrode active material layer disposed on at least one surface of the negative electrode current collector substrate.

[0074] As an example, the negative electrode current collector substrate has two surfaces opposite in the thickness direction thereof, and the negative electrode active material layer is disposed on either one or both of the two opposite surfaces of the negative electrode current collector substrate.

[0075] As an example, the negative electrode active material layer can employ a negative electrode active material layer for a battery cell known in the art. As an example, the negative electrode active material layer can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, lithium titanate, or the like. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present disclosure is not limited to these materials, and other conventional materials that can be used as a battery negative electrode active material layer can also be used. These negative electrode active material layers can be used alone only one or two or more can be used in combination.

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

[0077] In some embodiments, the separator is a separator film. The present disclosure does not have a particular limitation on the type of separator film, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0078] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive electrode sheet and the negative electrode sheet, or can be attached to the surface of the positive electrode sheet and / or the surface of the negative electrode sheet while being located between the positive electrode sheet and the negative electrode sheet.

[0079] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode sheet and the negative electrode sheet, and functions to transport ions and separate the positive and negative electrodes.

[0080] In some embodiments, the battery cell further includes an electrolyte that functions to conduct ions between the positive and negative electrodes. The type of electrolyte is not particularly limited by the present disclosure and can be selected as desired. The electrolyte can be liquid, gel, or solid.

[0081] As an example, the liquid electrolyte includes an electrolyte salt and a solvent.

[0082] In some embodiments, the electrolyte salt can be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonylimide, lithium bis-trifluoromethanesulfonylimide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoro oxalate borate, lithium di-oxalate borate, lithium difluoro di-oxalate phosphate, and lithium tetrafluoro oxalate phosphate.

[0083] In some embodiments, the solvent can 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, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, butanedisulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether-based solvent. The ether-based solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ether.

[0084] As an example, the gel electrolyte includes a polymer as a backbone network of the electrolyte, in combination with an ionic liquid-lithium salt.

[0085] As an example, the solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0086] As an example, the polymer solid-state electrolyte can be a polyether (polyethylene oxide), a polysiloxane, a polycarbonate, a polyacrylonitrile, a polyvinylidene fluoride, a polymethyl methacrylate, a single-ion polymer, a polyionic liquid-lithium salt, a cellulose, or the like.

[0087] As an example, the inorganic solid-state electrolyte can be one or more of an oxide solid-state electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), a sulfide solid-state electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorous sulfide, argyrodite), amorphous sulfide), and a halide solid-state electrolyte, a nitride solid-state electrolyte, and a hydride solid-state electrolyte.

[0088] As an example, the composite solid-state electrolyte is formed by adding an inorganic solid-state electrolyte filler to a polymer solid-state electrolyte.

[0089] In some embodiments, the shape of the electrode assembly can be flat. The battery cell can correspondingly be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes.

[0090] In some embodiments, the battery cell can include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, or the like.

[0091] As an example, the battery cell can be a pouch battery cell or a hard-shell battery cell. The hard-shell battery cell can be a prismatic battery cell, such as a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell, or the like. The multi-prismatic battery cell can be, for example, a hexagonal prism battery cell, or the like.

[0092] In some embodiments, the battery includes a battery module. The battery module can include a plurality of battery cells connected in series, in parallel, or in a mixed connection. The battery module can be accommodated in a box to form a battery. The box can be independently arranged or as part of the chassis structure of a vehicle. For example, part of the box can become at least part of the floor of the vehicle, or part of the box can become at least part of the cross beam and the longitudinal beam of the vehicle.

[0093] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, or the like.

[0094] In some related technologies, the battery module adopts a structure of a single-layer sampling circuit board, and a plurality of sampling terminals are arranged on the single-layer sampling circuit board to sample the voltage, temperature, and the like of each battery cell in the battery module.

[0095] It is found through research that the single-layer sampling circuit board has limited sampling terminals and sampling lines, and cannot meet the needs of more sampling points. Moreover, for a battery module with a small size, the sampling circuit board cannot arrange enough sampling lines.

[0096] Therefore, the battery and the power consumption device provided in the embodiments of the present disclosure can improve the arrangement of the sampling lines for the battery.

[0097] In one aspect of the present disclosure, a battery having a plurality of sampling positions is provided, and the battery comprises a sampling structure, wherein the sampling structure comprises: a sampling circuit board comprising at least two layers of circuit board segments in a folded state; and a plurality of sampling terminals for being electrically connected to respective sampling positions of the battery; wherein the plurality of sampling terminals comprises at least two groups of sampling terminals electrically connected to the at least two layers of circuit board segments, respectively.

[0098] In the present embodiment, the sampling circuit board comprises at least two layers of circuit board segments in a folded state, and the at least two layers of circuit board segments are electrically connected to at least two groups of sampling terminals in the plurality of sampling terminals electrically connected to respective sampling positions of the battery, respectively. In this way, the sampling circuit board can connect more sampling terminals in a limited size, meet the wiring needs of more sampling points of the battery, and improve the wiring utilization rate of the sampling circuit board in a limited space. Moreover, the layers of circuit board segments in the folded sampling circuit board can be connected through lines on the sampling circuit board, without relying on external lines or conductive channels arranged between vias of adjacent layers of circuit boards, thereby facilitating reduction of line complexity, improvement of signal transmission anti-interference, and reduction of circuit board design difficulty.

[0099] The battery of the embodiments of the present disclosure can be applied to various power consumption devices using the battery. The power consumption device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric vehicle, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric vehicle toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer. The embodiments of the present disclosure do not particularly limit the above-mentioned power consumption devices. The battery can be used for power supply of a power consumption device such as a vehicle, for example, to provide power for control or driving.

[0100] FIG. 1 is a structural schematic diagram of some embodiments of an electric device according to the present disclosure. For convenience, the electric device is exemplified by a vehicle. Referring to FIG. 1, the vehicle 60 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle or a hybrid electric vehicle, etc. The battery 10 can be disposed at the bottom or the front or the rear of the vehicle 60.

[0101] The battery 10 can be used for power supply of the vehicle 60, for example, the battery 10 can be used as an operating power source of the vehicle 60, for example, for the circuit system of the vehicle 60, for example, for the power demand of the vehicle 60 during starting, navigation, and operation. The battery 10 can not only be used as an operating power source of the vehicle 60, but also be used as a driving power source of the vehicle 60, to replace or partially replace fuel or natural gas to provide driving force for the vehicle 60.

[0102] The vehicle 60 can also be provided with an axle, a wheel, a motor, and a controller, which is used to control the power supply of the battery 10 to the motor. For example, when the vehicle 60 uses the battery 10 as a driving power source, the battery 10 replaces or partially replaces fuel or natural gas to provide the required power for the motor at a constant speed or acceleration. The motor is used to drive the axle to rotate, so as to drive the wheel to rotate.

[0103] FIG. 2 is an exploded schematic diagram of some embodiments of the battery according to the present disclosure. Referring to FIG. 2, in some embodiments, the battery 10 can include a plurality of battery monomers 11, a box 14, and a box cover 15 covering the open side of the box 14. The box 14 and the box cover 15 can provide a containing space for the battery monomers 11, and provide sealing and anti-impact functions, etc., and can also avoid the adverse effects of liquid or other foreign matters on the charging and discharging or safety of the battery module.

[0104] The box 14 and the box cover 15 can be various shapes, such as a cuboid or a cylinder, etc. The box 14 can be a hollow structure with one side open, and the box cover 15 can also be a hollow structure with one side open. The open side of the box cover 15 covers the open side of the box 14, so as to form an internal containing space. In other embodiments, the box cover 15 can be a plate structure, and covers the open side of the box 11 to form an internal containing space.

[0105] For the battery 10 including a plurality of battery monomers 11, the plurality of battery monomers 11 can be arranged in at least one of the length direction and the width direction of the box 14. According to actual needs, at least one row of battery monomers 11 can be provided. According to needs, one or more layers of battery monomers 11 can also be provided in the height direction of the battery 10.

[0106] In some embodiments, the plurality of battery cells 11 can form one or more battery modules in series, in parallel, or in a mixed manner, and the one or more battery modules are accommodated in the case 14. For the plurality of battery modules, the arrangement can be along at least one of the length direction and the width direction of the case 14, or in the height direction of the battery 10, or one or more layers of battery modules can be arranged.

[0107] FIG. 3 is a schematic diagram of the mounting structure of the battery cell, the sampling structure, and the spacer in some embodiments of the battery according to the present disclosure. FIG. 4 is a schematic diagram of the exploded structure of FIG. 3. Referring to FIGS. 3 and 4, the battery 10 of the present embodiment includes a sampling structure 12 for the battery 10. The sampling structure 12 can sample the voltage, temperature, and other signals of each battery cell in the battery 10 and send them to other elements or systems, such as the battery management system (BMS) of the battery 10. The specific sampling structure is described further below, and will not be described in detail here.

[0108] Referring to FIGS. 3 and 4, in some embodiments, the battery 10 includes a plurality of battery cells 11 arranged along a first direction and a plurality of busbars 112, the plurality of busbars 112 are respectively electrically connected to a plurality of sampling terminals 30 of the sampling structure 12, and each busbar 112 is respectively electrically connected to adjacent battery cells 11. The first direction is parallel to the length direction of the sampling circuit board 20 of the sampling structure 12.

[0109] The battery cell 11 can include an electrode assembly, an electrolyte, and a housing accommodating the electrode assembly and the electrolyte. For details, please refer to the previous detailed description of the battery cell, which will not be expanded here. In FIGS. 3 and 4, the battery cell 11 adopts a square cell, and in other embodiments, other structures such as a blade-shaped battery cell, a multi-prismatic battery, etc. can also be adopted.

[0110] In FIG. 3, a rectangular coordinate system can be defined according to the height direction of the battery cell 11 and the arrangement direction of the plurality of battery cells 11. In FIG. 3, the first direction dr can be parallel to the arrangement direction of the plurality of battery cells 11, and also parallel to the length direction of the sampling circuit board 20. The third direction dr3 is parallel to the height direction of the battery cell 11, and the second direction dr2 is perpendicular to both the first direction dr1 and the third direction dr3. The two electrode lead-out portions of the battery cell 11 with opposite polarities can be arranged at intervals along the second direction dr2. The plurality of busbars 112 can be arranged as two rows of busbars 112 arranged at intervals along the second direction dr2, and each row of busbars 112 includes a plurality of busbars 112 arranged along the first direction dr1.

[0111] In FIG. 4, the top of each battery cell 11 is provided with two electrode lead-out portions 11p of opposite polarity, and the shells of two adjacent battery cells 11 are connected to each other or connected by flexible buffer members. The busbars 112 are connected to the electrode lead-out portions 11p of the two adjacent battery cells 11, respectively, to realize series connection or parallel connection between the two battery cells 11. The busbars 112 are made of conductive materials, such as metal materials or alloys, for example, copper, aluminum, etc., and are electrically connected to the electrode lead-out portions 11p of the battery cells 11, for example, by welding.

[0112] The sampling structure 12 includes a plurality of sampling terminals 30 electrically connected to the plurality of busbars 112. The electrical connection between the sampling terminals 30 and the busbars 112 can be achieved by welding or the like. The sampling terminals 30 can sample signals such as voltage, current, temperature, etc. on the busbars 112 connected by the sampling terminals 30 according to the designed sampling circuit.

[0113] By arranging the first direction of the battery cells 11 parallel to the length direction of the sampling circuit board 20 of the sampling structure 12, the busbars 112 connected to each battery cell 11 can be connected to the sampling terminals 30 distributed in the length direction of the sampling circuit board 20, so as to form a sufficient arrangement space for the sampling-related circuit on the sampling circuit board 20.

[0114] Referring to FIG. 4, in some embodiments, the battery 10 further includes a spacer 13. The spacer 13 is located between the plurality of battery cells 11 and the plurality of busbars 112, and has a through region 131 for electrically connecting the plurality of battery cells 11 and the plurality of busbars 112, respectively. The sampling circuit board 20 is located on the side of the spacer 13 away from the plurality of battery cells 11.

[0115] The spacer 13 can be made of a material having electrical insulation isolation capability, such as insulating plastic or insulating ceramic material, etc. The spacer 13 can be configured as a sheet structure with length and width greater than thickness. The through region 131 can be a through hole with the same cross-sectional shape as the electrode lead-out portion 11p of the battery cell 11 and a cross-sectional size not less than that of the electrode lead-out portion 11p.

[0116] The spacer 13 is arranged between the plurality of battery cells 11 and the plurality of busbars 112, so that the sampling circuit board 20 is separated from the battery cells 11 by the spacer 13, and the plurality of battery cells 11 and the plurality of busbars 112 form electrical connection from the through region 131 of the spacer 13. In this way, the sampling circuit board 20 can obtain sampling signals from each battery cell 11 through the busbars 112 via the sampling terminals 30, and good insulation effect can be formed between the sampling circuit board 20 and the battery cells 11, reducing the risk of short circuit.

[0117] FIG. 5 is a structural schematic diagram of a sampling structure in some embodiments of a battery according to the present disclosure, in a perspective view along a third direction. FIG. 6 is a partial structural schematic diagram of a sampling structure in some embodiments of a battery according to the present disclosure, in an unfolded state. FIG. 7 is a structural schematic diagram of the sampling structure shown in FIG. 5, in a perspective view along a second direction. FIG. 8 is an enlarged schematic diagram of circle A in FIG. 7. FIG. 9 is a three-dimensional structural schematic diagram of a sampling structure in some embodiments of a battery according to the present disclosure. FIG. 10 is an enlarged schematic diagram of circle B in FIG. 9.

[0118] Referring to FIGS. 3-10, embodiments of the present disclosure provide a battery 10 having a plurality of sampling positions. The battery includes a sampling structure 12, wherein the sampling structure 12 includes a sampling circuit board 20 and a plurality of sampling terminals 30. The sampling circuit board 20 includes at least two layers of circuit board segments 21 in a folded state. The plurality of sampling terminals 30 are respectively electrically connected to the respective sampling positions of the battery 10. The plurality of sampling terminals 30 include at least two groups of sampling terminals 30 respectively electrically connected to the at least two layers of circuit board segments 21.

[0119] The sampling circuit board 20 collects signals such as voltages and temperatures of the respective battery cells 11 in the battery, and can send these signals to a master control chip of the battery to determine information such as the state of charge and the state of health of the entire battery 10. The sampling terminals 30 can extract the voltages, temperatures, and the like of the battery cells 11 directly or through the electrical connection of the busbar 112 to the battery cells 11, and are connected to the sampling lines arranged on the sampling circuit board 20 to effectively monitor various parameters during the operation of the battery 10.

[0120] The at least two layers of circuit board segments 21 in a folded state refer to an overlapping multi-layer structure formed by bending or folding the at least partially lengthened sampling circuit board 20 at a predetermined position through a flexible area or a hinge, and the at least two layers folded out of the sampling circuit board 20 are defined as the at least two layers of circuit board segments 21.

[0121] In the present embodiment, the sampling circuit board 20 includes at least two layers of circuit board segments 21 in a folded state, and the at least two layers of circuit board segments 21 are respectively electrically connected to at least two groups of sampling terminals 30 of the plurality of sampling terminals 30 electrically connected to the respective sampling positions of the battery 10. This allows the sampling circuit board 20 to connect more sampling terminals 30 in a limited size, meet the wiring requirements of more sampling points of the battery 10, and improve the wiring utilization of the sampling circuit board 20 in a limited space.

[0122] Compared with the single-layer sampling circuit board solution in the related art, the at least two circuit board segments 21 in the folded state can be connected to more sampling terminals, more sampling points are realized, and the need for arranging more sampling lines is met. Even for a relatively narrow battery, there is sufficient space for arranging lines.

[0123] The layers of the circuit board segments 21 in the folded sampling circuit board 20 can be connected through lines on the sampling circuit board 20, without relying on external lines or conductive channels arranged between vias of adjacent layers of the circuit board, thereby facilitating reduction of line complexity, improvement of signal transmission anti-interference performance, and reduction of circuit board design difficulty.

[0124] Referring to FIGS. 6 and 8, in some embodiments, the sampling circuit board 20 has a flexible segment 22a at the interlayer folding position 22 between two adjacent circuit board segments 21.

[0125] The interlayer folding position 22 refers to a position at which two adjacent circuit board segments 21 are folded and connected to each other. The flexible segment 22a refers to a portion of the sampling circuit board 20 made of a flexible material that can be bent and folded. The flexible segment 22a can be made of a material with soft texture, such as polyimide (PI), so that it can be bent and folded within a certain range.

[0126] In the present embodiment, by arranging the flexible segment 22a at the interlayer folding position 22 between two adjacent circuit board segments 21, stress concentration of the sampling circuit board 20 during folding and in the folded state is reduced, and the risk of damage to the interlayer folding position 22 of the sampling circuit board 20 due to failure to fold to a suitable angle or excessive bending stress is reduced. In addition, the flexible segment 22a can also make the electrical connection of the lines arranged therein for connecting two adjacent circuit board segments 21 more reliable and reduce the risk of failure.

[0127] In some embodiments, the sampling circuit board 20 is a flexible circuit board.

[0128] A flexible circuit board (FPC) can be made of a polyester film or polyimide as a base material, and has a small mass and good flexibility. In the present embodiment, the sampling circuit board 20 is arranged as a flexible circuit board, and the folding requirement between the multiple circuit board segments 21 is met by the flexibility of the flexible circuit board itself, thereby improving the utilization rate of the lines of the sampling circuit board 20 in a limited space and achieving better design flexibility.

[0129] In some embodiments, two adjacent circuit board segments 21 of the at least two circuit board segments 21 are adhesively fixed.

[0130] In the embodiment, the adjacent two layers of the circuit board segments 21 are fixed by bonding, which can realize the mutual positioning of the adjacent two layers of the folded circuit boards, prevent the dislocation from affecting the connection reliability of the sampling circuit board 20, and is relatively simple in bonding process and less in space occupation, which is conducive to reducing the space occupation of the sampling structure.

[0131] Referring to FIG. 8, in some embodiments, the adjacent two layers of the circuit board segments 21 are bonded by the double-sided adhesive tape 23.

[0132] The double-sided adhesive tape 23 has adhesion on both sides and can be made by coating adhesive film on opposite sides of a substrate such as paper or plastic. In the embodiment, the adjacent two layers of the circuit board segments 21 are bonded by the double-sided adhesive tape 23b, which can obtain relatively stable and consistent bonding effect and is easy to operate and position, which is conducive to improving the production efficiency.

[0133] Referring to FIG. 4, in some embodiments, the sampling structure 12 further comprises a battery management system BMS and at least two electrical connectors 40. The at least two electrical connectors 40 are respectively arranged on the at least two layers of the circuit board segments 21 and are used for electrical connection with the battery management system BMS.

[0134] The battery management system BMS is used for monitoring and controlling the operating conditions of the battery, including monitoring the voltage, current, temperature and other parameters of each battery cell, and realizing the estimation of the state-of-charge (SOC) and the state-of-health (SOH). The electrical connector 40 is installed on the sampling circuit board 20 and is used for establishing electrical connection between the sampling circuit board 20 and the battery management system BMS, so as to transmit at least one of power, control signal and data signal.

[0135] In the embodiment, the at least two electrical connectors 40 respectively arranged on the at least two layers of the circuit board segments 21 realize electrical connection with the battery management system BMS of the battery 10, so that each layer of the circuit board segment 21 obtains sampling data from each sampling position of the battery 10 through the sampling terminal 30 and provides the sampling data to the battery management system BMS, so that the battery management system BMS monitors and controls the battery state, which is conducive to optimizing the battery performance and improving the reliability of the battery.

[0136] In some embodiments, the number of the at least two electrical connectors 40 is the same as the number of layers of the at least two layers of the circuit board segments 21, and the at least two electrical connectors 40 correspond to the at least two layers of the circuit board segments 21 one by one, and each electrical connector 40 independently realizes electrical connection between the circuit in the corresponding layer of the circuit board segment 21 and the battery management system BMS.

[0137] In the embodiment, each layer of the circuit board segment 21 is provided with an electrical connector 40 to independently realize the electrical connection between the circuit in the layer of the circuit board segment 21 and the battery management system BMS, so that each layer of the circuit board segment 21 can be divided according to the needs to realize the sampling of different areas or different parameters of the battery 10, and the battery management system BMS can also determine the circuit board segment 21 corresponding to the electrical connector 40 according to the fault information reflected by the electrical connector 40, thereby facilitating fault positioning.

[0138] Referring to FIGS. 5 and 8, in some embodiments, the sampling circuit board 20 is a flexible circuit board, and the sampling structure 12 further comprises a reinforcing member 50. The reinforcing member 50 is fixed between adjacent two layers of the circuit board segments 21 in the at least two layers of the circuit board segments 21. The adjacent two layers of the circuit board segments 21 are fixed with the reinforcing member 50 to form a reinforcing surface 21e for mounting at least two electrical connectors 40 in the area adjacent to the layer folding position 22 of the adjacent two layers of the circuit board segments 21.

[0139] The flexible circuit board itself can be significantly stretched or twisted when stressed. By fixing the reinforcing member 50 between the adjacent two layers of the circuit board segments 21, a reinforcing surface 21e for mounting at least two electrical connectors 40 is formed. When the electrical connectors 40 are mounted on the reinforcing surface 21e, the reinforcing surface 21e can improve the fixing strength of the electrical connectors 40 on the flexible circuit board, greatly reducing the degree of deformation or twisting of the flexible circuit board when the electrical connectors 40 are pulled out or inserted, thereby reducing the risk of the electrical connectors 40 loosening or falling off the flexible circuit board during this process.

[0140] Referring to FIG. 10, in some embodiments, the reinforcing member 50 has a plate-shaped portion 51, and opposite two plate surfaces of the plate-shaped portion 51 are respectively bonded and fixed with the adjacent two layers of the circuit board segments 21.

[0141] The plate-shaped portion 51 refers to a flat plate structure on the reinforcing member 50, and opposite two plate surfaces are formed in the thickness direction of the plate-shaped portion 51. By bonding and fixing the opposite two plate surfaces of the plate-shaped portion 51 of the reinforcing member 50 with the adjacent two layers of the circuit board segments 21 respectively, flat reinforcing surfaces 21e are formed on the opposite two sides of the adjacent two layers of the circuit board segments 21 on both sides of the reinforcing member 50, which can make the fixing of the electrical connectors 40 more stable, and can also reduce the space occupation of the electrical connectors 40 and the sampling circuit board 20 in the thickness direction of the sampling circuit board 20.

[0142] Referring to FIG. 8, in some embodiments, the opposite two plate surfaces of the plate-shaped portion 51 are respectively bonded with the adjacent two layers of the circuit board segments 21 by double-sided adhesive tape 23.

[0143] In the present embodiment, the opposite two plate surfaces of the plate-shaped portion 51 and the adjacent two circuit board segments 21 are bonded by the double-sided adhesive tape 22b, so that a relatively stable and consistent bonding effect can be obtained, and the operation and positioning are easy, which is beneficial to improve the production efficiency.

[0144] Referring to FIGS. 9 and 10, in some embodiments, the reinforcement 50 has a mounting portion 52 for mounting within the battery 10.

[0145] The mounting portion 52 refers to a part of the structure of the reinforcement 50 for mounting the reinforcement within the battery 10. In FIG. 10, the mounting portion 52 is a through hole at both ends of the reinforcement 50 in the width direction of the flexible circuit board, and the through hole is used to mount and fix the reinforcement with the internal structure of the battery 10. For example, for a battery including a battery module, a bolt is passed through the through hole to be fixedly connected with an end plate of the battery module. The battery management system BMS can be connected with the electrical connector 40 in a plug-in manner at a position adjacent to the end plate.

[0146] In the present embodiment, the reinforcement 50 can be mounted within the battery 10 through the mounting portion 52 to meet the positioning of the reinforcement 50 and the flexible circuit board connected thereto, so that the flexible circuit board is not easily dislocated to affect the connection reliability between the flexible circuit board and the sampling terminal 30.

[0147] Referring to FIGS. 3-10, in some embodiments, the at least two circuit board segments 21 include a first circuit board segment 211 and a second circuit board segment 212 arranged adjacent to each other, and the at least two electrical connectors 40 include a first electrical connector 41 corresponding to the first circuit board segment 211 and a second electrical connector 42 corresponding to the second circuit board segment 212, the first electrical connector 41 and the second electrical connector 42 are located on opposite sides of the first circuit board segment 211 and the second circuit board segment 212, and are arranged adjacent to the interlayer folding position 22 of the first circuit board segment 211 and the second circuit board segment 212.

[0148] In FIG. 6, the sampling circuit board 20 in the unfolded state can be folded at the interlayer folding position 22 to form the folded double-layer circuit board segment shown in FIGS. 5 and 7. Here, the circuit board segment 21 on the upper side in FIGS. 7 and 8 is defined as the first circuit board segment 211, and the circuit board segment 21 on the lower side in FIGS. 7 and 8 is defined as the second circuit board segment 212. Here, the first circuit board segment 211 is located on the side of the second circuit board segment 212 away from the battery monomer 11 in the third direction dr3. In other embodiments, the first circuit board segment 211 can also be arranged on the side of the second circuit board segment 212 adjacent to the battery monomer 11 in the third direction dr3.

[0149] The first and second circuit board segments 211 and 212 can be symmetrical with respect to the interlayer folding position 22. For example, each of the first and second circuit board segments 211 and 212 can be provided in a strip shape and have the same length and width. The first and second electrical connectors 41 and 42 can be designed according to the sampling functions of the corresponding circuit board segments and can have the same or different connector housings. In some embodiments, the first and second electrical connectors 41 and 42 can be symmetrically arranged with respect to the sampling circuit board 20 so that the first and second electrical connectors 41 and 42 can be integrally connected to the cables of the battery management system (BMS) in a plug-in manner.

[0150] In the present embodiment, the first and second circuit board segments 211 and 212 are folded to connect the first and second electrical connectors 41 and 42, respectively, and the first and second electrical connectors 41 and 42 are arranged on opposite sides of the first and second circuit board segments 211 and 212 and adjacent to the interlayer folding position 22, which facilitates the connection of the first and second electrical connectors 41 and 42 at the interlayer folding position 22 and reduces the length and complexity of the wiring.

[0151] Referring to FIG. 8, in some embodiments, the sampling circuit board 20 is a flexible circuit board, and the sampling structure 12 further includes a reinforcing member 50. The reinforcing member 50 is fixed between the first and second circuit board segments 211 and 212. The reinforcing member 50 is bonded to the first and second circuit board segments 211 and 212 adjacent to the interlayer folding position 22, respectively, so that the first and second circuit board segments 211 and 212 form first and second reinforcing surfaces 21e1 and 21e2 for mounting the first and second electrical connectors 41 and 42, respectively.

[0152] In the present embodiment, for the first and second electrical connectors 41 and 42 adjacent to the interlayer folding position 22, the first and second circuit board segments 211 and 212 are bonded to the reinforcing member 50 adjacent to the interlayer folding position 22, respectively, to form the first and second reinforcing surfaces 21e1 and 21e2 for mounting the first and second electrical connectors 41 and 42, respectively, so that the first and second electrical connectors 41 and 42 can be more stably and reliably connected adjacent to the interlayer folding position 22.

[0153] Referring to FIGS. 5 and 6, in some embodiments, the plurality of sampling terminals 30 includes a first group of sampling terminals 31 electrically connected to the first layer circuit board segment 211 and a second group of sampling terminals 32 electrically connected to the second layer circuit board segment 212, the first group of sampling terminals 31 and the first electrical connector 41 are located on the same side of the first layer circuit board segment 211, and the second group of sampling terminals 32 and the second electrical connector 42 are located on the same side of the second layer circuit board segment 212.

[0154] In the present embodiment, by locating the first group of sampling terminals 31 and the first electrical connector 41 on the same side of the first layer circuit board segment 211, and locating the second group of sampling terminals 32 and the second electrical connector 42 on the same side of the second layer circuit board segment 212, the first group of sampling terminals 31, the second group of sampling terminals 32, the first electrical connector 41 and the second electrical connector 42 can be arranged on one side surface of the flexible circuit board before folding, thereby facilitating the reduction of processing procedures and the reduction of processing difficulty. Moreover, the first group of sampling terminals 31 and the second group of sampling terminals 32 of this structure are not located between the first layer circuit board segment 211 and the second layer circuit board segment 212, so that the first layer circuit board segment 211 and the second layer circuit board segment 212 are more flat when being bonded, achieving better bonding effect.

[0155] Referring to FIGS. 3 and 4, in some embodiments, the battery 10 includes a plurality of battery cells 11 and a plurality of busbars 112. The plurality of battery cells 11 are arranged at least along a first direction dr1. The plurality of busbars 112 are respectively electrically connected to the plurality of sampling terminals 30 of the sampling structure 12, and each busbar 112 is respectively electrically connected to adjacent battery cells 11, wherein the first direction is parallel to the length direction of the sampling circuit board 20 of the sampling structure 12.

[0156] The battery cells 11 can be arranged in a second direction dr2 or a third direction dr3 in addition to being arranged in the first direction dr1. In the present embodiment, the length direction of the sampling circuit board is parallel to the arrangement direction of the battery cells in the battery 10, and the busbars for electrically connecting adjacent battery cells are connected through the sampling terminals, so that the busbars connected to each battery cell can be connected to the sampling terminals distributed in the length direction of the sampling circuit board, thereby forming a more sufficient arrangement space for the sampling-related lines on the sampling circuit board.

[0157] Referring to FIG. 4, in some embodiments, the battery 10 further includes a spacer 13 located between the plurality of battery cells 11 and the plurality of busbars 112, and having a through region 131 for the plurality of battery cells 11 and the plurality of busbars 112 to be respectively electrically connected; wherein the sampling circuit board 20 is located on the side of the spacer 13 away from the plurality of battery cells 11.

[0158] In the embodiment, the spacers are arranged between the plurality of battery monomers and the plurality of busbars, the sampling circuit board is separated from the battery monomers by the spacers, and the plurality of battery monomers and the plurality of busbars are electrically connected from the through region of the spacers, so that the sampling circuit board can obtain the sampling signals from each battery monomer through the busbars via the sampling terminals, and good insulation effect can be formed between the sampling circuit board and the battery monomers, and the risk of short circuit is reduced.

[0159] The above battery can be used in various electrical equipment. Therefore, in one aspect of the present disclosure, an electrical equipment is provided, which comprises the battery 10 of any of the foregoing embodiments.

[0160] In some specific embodiments, as shown in FIGS. 3-10, the battery 10 comprises a sampling structure 12, a plurality of battery monomers 11, a plurality of busbars 112, and a battery management system BMS, the plurality of busbars 112 are electrically connected with the plurality of sampling terminals 30 of the sampling structure 12 respectively, and each busbar 112 is electrically connected with the adjacent battery monomer 11 respectively. The sampling structure 12 comprises a sampling circuit board 20 and a plurality of sampling terminals 30. The sampling circuit board 20 is a flexible circuit board. The sampling circuit board 20 comprises a first layer circuit board segment 211 and a second layer circuit board segment 212 in a folded state. The first layer circuit board segment 211 and the second layer circuit board segment 212 are bonded by double-sided adhesive 23.

[0161] The plurality of sampling terminals 30 comprises a first group of sampling terminals 31 electrically connected with the first layer circuit board segment 211 and a second group of sampling terminals 32 electrically connected with the second layer circuit board segment 212, the first group of sampling terminals 31 and the first electrical connector 41 are located on the same side of the first layer circuit board segment 211, and the second group of sampling terminals 32 and the second electrical connector 42 are located on the same side of the second layer circuit board segment 212.

[0162] The sampling structure 12 further comprises a first electrical connector 41 corresponding to the first layer circuit board segment 211 and a second electrical connector 42 corresponding to the second layer circuit board segment 212, the first electrical connector 41 and the second electrical connector 42 are located on opposite sides of the first layer circuit board segment 211 and the second layer circuit board segment 212, and are arranged adjacent to the interlayer folding position 22 of the first layer circuit board segment 211 and the second layer circuit board segment 212. The first electrical connector 41 and the second electrical connector 42 independently realize the electrical connection between the circuits in the first layer circuit board segment 211 and the second layer circuit board segment 212 and the battery management system BMS.

[0163] The sampling structure 12 further comprises a reinforcing member 50 fixed between the first layer circuit board segment 211 and the second layer circuit board segment 212, wherein the reinforcing member 50 is bonded with the first layer circuit board segment 211 and the second layer circuit board segment 212 respectively adjacent to the area of the interlayer folding position 22, so that the first layer circuit board segment 211 and the second layer circuit board segment 212 respectively form a first reinforcing surface 21e1 for mounting the first electrical connector 41 and a second reinforcing surface 21e2 for mounting the second electrical connector 42.

[0164] Although the present disclosure has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the present disclosure, and components thereof can be replaced with equivalents. In particular, the technical features mentioned in the respective embodiments can be combined in any manner as long as there is no structural conflict. The present disclosure 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 (10) having a plurality of sampling locations, the battery comprising a sampling structure (12), wherein, The sampling structure (12) comprises: a sampling circuit board (20) comprising at least two layers of circuit board segments (21) in a folded state; and a plurality of sampling terminals (30) for being electrically connected to respective sampling positions of the battery (10) respectively; wherein the plurality of sampling terminals (30) comprises at least two groups of sampling terminals (30) electrically connected to the at least two layers of circuit board segments (21) respectively.

2. The battery (10) according to claim 1, wherein The sampling circuit board (20) has a flexible segment (22a) at a layer-to-layer folding position (22) between adjacent two layers of circuit board segments (21).

3. The battery (10) of claim 2, wherein, The sampling circuit board (20) is a flexible circuit board.

4. The battery (10) according to any one of claims 1-3, wherein Adjacent two layers of circuit board segments (21) in the at least two layers of circuit board segments (21) are adhesively fixed.

5. The battery (10) of claim 4, wherein, The adjacent two layers of circuit board segments (21) are adhesively fixed by double-sided adhesive tape (23).

6. The battery (10) according to any one of claims 1-5, further comprising: a battery management system (BMS); and at least two electrical connectors (40) respectively arranged on the at least two layers of circuit board segments (21) for electrically connecting to the battery management system (BMS). The number of the at least two electrical connectors (40) is the same as the number of layers of the at least two layers of circuit board segments (21), and the at least two electrical connectors (40) correspond to the at least two layers of circuit board segments (21) one-to-one, and each electrical connector (40) independently realizes electrical connection between a circuit in the corresponding layer of circuit board segment (21) and the battery management system (BMS).

7. The battery (10) of claim 6, wherein, The sampling circuit board (20) is a flexible circuit board, and the sampling structure (12) further comprises:

8. The battery (10) according to any one of claims 6-7, wherein a reinforcing member (50) fixed between adjacent two layers of circuit board segments (21) in the at least two layers of circuit board segments (21); wherein the adjacent two layers of circuit board segments (21) are adhesively fixed to the reinforcing member (50) to form a reinforcing surface (21e) for mounting the at least two electrical connectors (40) in a region adjacent to the layer-to-layer folding position (22) of the adjacent two layers of circuit board segments (21). The reinforcing member (50) has a plate-shaped portion (51), and opposite two plate surfaces of the plate-shaped portion (51) are adhesively fixed to the adjacent two layers of circuit board segments (21) respectively.

9. The battery (10) of claim 8, wherein, The opposite two plate surfaces of the plate-shaped portion (51) are adhesively fixed to the adjacent two layers of circuit board segments (21) by double-sided adhesive tape (23) respectively.

10. The battery (10) of claim 9, wherein, The reinforcing member (50) has a mounting portion (52) for mounting in the battery (10).

11. The battery (10) according to any one of claims 8-10, wherein ​ 12. The battery (10) according to any one of claims 6-11, wherein The at least two circuit board segments (21) include a first circuit board segment (211) and a second circuit board segment (212) arranged adjacently, the at least two electrical connectors (40) include a first electrical connector (41) corresponding to the first circuit board segment (211) and a second electrical connector (42) corresponding to the second circuit board segment (212), the first electrical connector (41) and the second electrical connector (42) are located on opposite sides of the first circuit board segment (211) and the second circuit board segment (212) and arranged adjacent to an interlayer folding position (22) of the first circuit board segment (211) and the second circuit board segment (212).

13. The battery (10) of claim 12, wherein, The sampling circuit board (20) is a flexible circuit board, and the sampling structure (12) further includes: a reinforcing member (50) fixed between the first circuit board segment (211) and the second circuit board segment (212); wherein the reinforcing member (50) is bonded to the first circuit board segment (211) and the second circuit board segment (212) adjacent to the regions of the interlayer folding position (22) respectively, so that the first circuit board segment (211) and the second circuit board segment (212) form a first reinforcing surface (21e1) for mounting the first electrical connector (41) and a second reinforcing surface (21e2) for mounting the second electrical connector (42) respectively.

14. The battery (10) according to claim 12 or 13, wherein The plurality of sampling terminals (30) include a first group of sampling terminals (31) electrically connected to the first circuit board segment (211) and a second group of sampling terminals (32) electrically connected to the second circuit board segment (212), the first group of sampling terminals (31) and the first electrical connector (41) are located on the same side of the first circuit board segment (211), and the second group of sampling terminals (32) and the second electrical connector (42) are located on the same side of the second circuit board segment (212).

15. The battery (10) according to any one of claims 1-14, further comprising: a plurality of battery cells (11) arranged at least along a first direction; and a plurality of busbars (112) respectively electrically connected to the plurality of sampling terminals (30), and each busbar (112) is respectively electrically connected to an adjacent battery cell (11), wherein the first direction is parallel to the length direction of the sampling circuit board (20).

16. The battery (10) according to claim 15, further comprising: a spacer (13) located between the plurality of battery cells (11) and the plurality of busbars (112) and having a through region (131) for the plurality of battery cells (11) and the plurality of busbars (112) to be respectively electrically connected; wherein the sampling circuit board (20) is located on a side of the spacer (13) away from the plurality of battery cells (11).

17. An electrical device, comprising: the battery (10) according to any one of claims 1-16.

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