Battery, support assembly, battery module, power utilization device and energy storage device

Abstract

The utility model discloses a battery, a support assembly, a battery module, a power utilization device and an energy storage device, the battery comprises at least two electrode assemblies, the electrode assemblies comprise tabs, and the adjacent electrode assemblies are electrically connected through the tabs; the support assembly is arranged between every two adjacent electrode assemblies; the bracket assembly comprises a supporting part used for supporting the electrode assembly; the limiting part is used for accommodating and / or supporting the tab; the limiting part comprises a first limiting part and a second limiting part, the first limiting part and the second limiting part are arranged in a separable and matched mode, when the first limiting part and the second limiting part are arranged in a matched mode, a gap is formed between the first limiting part and the second limiting part, and the gap is used for containing the tab. The energy density of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to batteries, bracket assemblies, battery modules, electrical devices and energy storage devices. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In new energy vehicles equipped with batteries, batteries can be used to provide power in whole or in part. In the field of energy storage, batteries can be installed in energy storage boxes or directly on the user side. In these application scenarios, the industry has put forward higher requirements for the energy density of batteries. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a battery, a bracket assembly, a battery module, an electrical device and an energy storage device with high energy density.

[0005] This application is implemented through the following technical solutions.

[0006] The first aspect of the present application provides a battery, comprising: at least two electrode assemblies, each of which comprises a pole lug, and adjacent electrode assemblies are electrically connected via the pole lug; a bracket assembly, arranged between two adjacent electrode assemblies; the bracket assembly comprises: a supporting portion, the supporting portion being used to support the electrode assembly to form a space for accommodating the pole lug; and a limiting portion, the limiting portion being used to accommodate and / or support the pole lug; wherein the limiting portion comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion being detachable and matingly arranged, and when the first limiting portion and the second limiting portion are matingly arranged, there is a gap between the first limiting portion and the second limiting portion, and the gap is used to accommodate the pole lug.

[0007] The supporting part supports two adjacent electrode assemblies, and the two limiting parts cooperate with each other to form a gap for accommodating the pole ears, which can not only limit the relative displacement of the two electrode assemblies, but also the two limiting parts form limiting protection for the pole ears, thereby reducing the risk of the pole ears breaking due to squeezing, pulling or undesirable folding, thereby realizing the production application of long batteries and improving the battery grouping efficiency and energy density.

[0008] In some embodiments, the first limiting portion and the second limiting portion can be arranged in cooperation along a first direction or along a second direction to form the gap; the first direction is perpendicular to the supporting direction of the electrode assembly supported by the supporting portion, and the second direction is parallel to the supporting direction.

[0009] The first limiting portion and the second limiting portion can cooperate in a variety of ways to support and protect the pole ear, making the assembly more flexible and adaptable to different battery application scenarios, especially the production and application of long batteries, thereby improving the battery assembly efficiency and energy density.

[0010] In some embodiments, the bracket assembly also includes a blocking portion, which is located in the gap to separate the gap into a first gap and a second gap distributed along a third direction, the first gap and the second gap are respectively used to accommodate a first pole ear and a second pole ear of the electrode assembly, and the third direction is perpendicular to the first direction and the second direction.

[0011] The barrier portion divides the gap into two gaps for accommodating the first pole ear and the second pole ear of the electrode assembly, which can protect the two pole ears at the same time and can block two pole ears with different electrical polarities to reduce the risk of short circuit.

[0012] In some embodiments, the support portion includes a first support portion and a second support portion, the first support portion is configured to be connected to the first limiting portion, and the second support portion is configured to be connected to the second limiting portion.

[0013] Each limiting part is respectively connected to the supporting part, which is convenient for assembly, improves the strength and makes the support more reliable.

[0014] In some embodiments, a liquid flow hole is provided in at least one of the first limiting portion, the first supporting portion, the second limiting portion, and the second supporting portion.

[0015] The flow holes are used to accelerate the flow of electrolyte when injecting electrolyte into the shell, so that the electrolyte can fully infiltrate each electrode component. At the same time, they also play a role in reducing weight, which helps to make the battery lighter.

[0016] In some embodiments, the first supporting portion and the second supporting portion are detachably connected so that the first limiting portion and the second limiting portion can be separated and matched.

[0017] The first support part and the second support part are detachably connected to realize the separation and matching of the first limiting part and the second limiting part, which is convenient for assembly and can make most of the structures of the first limiting part and the second limiting part play the role of protecting the pole ear and reduce interference with the pole ear.

[0018] In some embodiments, the first limiting portion and the second limiting portion can be separated and matched along a first direction, and the gap is configured to have an escape opening that passes through along the second direction.

[0019] Thus, the bracket assembly can cooperate along a first direction perpendicular to the arrangement direction of the electrode assembly to support the electrode assembly and protect the electrode tab.

[0020] In some embodiments, the first limiting portion and the second limiting portion can be separated and matched along the second direction, and the gap is configured to have an escape opening that opens on at least one side toward the first direction.

[0021] Thus, the bracket assembly can cooperate along the same direction as the arrangement direction of the electrode assembly to support the electrode assembly and protect the electrode lug.

[0022] In some embodiments, the first limiting portion and the second limiting portion can be separated and matched along a first direction, and the gap is configured to have a first avoidance opening and a second avoidance opening respectively opening toward opposite sides of the first direction.

[0023] Thus, the bracket assembly can cooperate along a first direction perpendicular to the arrangement direction of the electrode assembly to support the electrode assembly and protect the electrode tab.

[0024] In some embodiments, both the first limiting portion and the second limiting portion are provided with the blocking portion, and the two blocking portions protrude along the first direction and abut against each other.

[0025] The two blocking parts provide more space for the gap formed by the cooperation between the first limiting part and the second limiting part, and can block two pole ears with different electrical polarities to reduce the risk of short circuit.

[0026] In some embodiments, along the third direction, the relative ends of the first limiting portion are respectively connected to the first supporting portion, and the relative ends of the second limiting portion are respectively connected to the second supporting portion. Along the second direction, the relative ends of the first supporting portion both protrude from the first limiting portion, and the relative ends of the second supporting portion both protrude from the second limiting portion.

[0027] The supporting portion is higher than the limiting portion, which avoids interference between the limiting portion and the root of the electrode ear or the main body of the electrode assembly. Such a structure can improve the overall strength of the bracket assembly and provide reliable support and protection for the electrode assembly.

[0028] In some embodiments, the first support portion and the second support portion both include a hollow main body portion and an extension portion, each of the hollow main body portions includes a first end and a second end located on opposite sides in the second direction, and each of the extension portions is arranged at the second end, and when the first support portion is connected to the second support portion, the extension portion of the first support portion covers the first end of the second support portion, and the extension portion of the second support portion covers the first end of the first support portion.

[0029] The structure of the support part is a hollow structure, which reduces the weight of the bracket assembly and is beneficial to the lightweight of the battery. The first support part is connected to the second support part, and the support area is increased through the expansion part, so that the support is more stable.

[0030] In some embodiments, the tabs of two adjacent electrode assemblies extend along the second direction and are connected to each other, and the tabs pass through the avoidance opening.

[0031] Therefore, the bracket assembly can be easily installed between two electrode assemblies connected without bent pole tabs to protect the pole tabs.

[0032] In some embodiments, the electrode ears of two adjacent electrode assemblies each include a gathering portion and a bending portion, the gathering portion is connected between the main body portion and the bending portion of the corresponding electrode assembly, the bending portion is bent relative to the gathering portion, the bending portions of the two adjacent electrode assemblies both extend along the same side of the first direction and are connected to each other, and the bending portion passes through the avoidance opening and is located in the gap.

[0033] Therefore, the bracket assembly can be easily installed between two electrode assemblies having pole ears bent in the same direction, thereby protecting the pole ears.

[0034] In some embodiments, the electrode ears of two adjacent electrode assemblies each include a gathering portion and a bending portion, the gathering portion is connected between the main body portion and the bending portion of the corresponding electrode assembly, the bending portion is bent relative to the gathering portion, and the bending portions of the two adjacent electrode assemblies extend along opposite sides of the first direction and are connected to each other, and each bending portion passes through the first avoidance opening and the second avoidance opening and is located in the gap.

[0035] Thus, the two bent portions extending along the opposite sides of the first direction can be easily accommodated in the gap.

[0036] The third aspect of the present application provides a bracket assembly, comprising: a supporting portion, which is used to support the electrode assembly to form a space for accommodating the electrode lug of the electrode assembly; and a limiting portion, which is used to accommodate and / or support the electrode lug; wherein the limiting portion comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are detachable and cooperatively arranged, and when the first limiting portion and the second limiting portion are cooperatively arranged, there is a gap between the first limiting portion and the second limiting portion, and the gap is used to accommodate the electrode lug.

[0037] In some embodiments, the first limiting portion and the second limiting portion can be arranged in cooperation along a first direction or along a second direction to form the gap; the first direction is perpendicular to the supporting direction of the electrode assembly supported by the supporting portion, and the second direction is parallel to the supporting direction.

[0038] In some embodiments, the bracket assembly also includes a blocking portion, which is located in the gap to separate the gap into a first gap and a second gap distributed along a third direction, the first gap and the second gap are respectively used to accommodate a first pole ear and a second pole ear of the electrode assembly, and the third direction is perpendicular to the first direction and the second direction.

[0039] In some embodiments, the support portion includes a first support portion and a second support portion, the first support portion is configured to be connected to the first limiting portion, and the second support portion is configured to be connected to the second limiting portion.

[0040] In some embodiments, the first supporting portion and the second supporting portion are detachably connected so that the first limiting portion and the second limiting portion can be separated and matched.

[0041] In some embodiments, the first limiting portion and the second limiting portion can be separated and matched along a first direction, and the gap is configured to have an escape opening that passes through along the second direction.

[0042] In some embodiments, the first limiting portion and the second limiting portion can be separated and matched along the second direction, and the gap is configured to have an escape opening that opens on at least one side toward the first direction.

[0043] In some embodiments, the first limiting portion and the second limiting portion can be separated and matched along a first direction, and the gap is configured to have avoidance openings opening toward opposite sides of the first direction.

[0044] A third aspect of the present application provides a battery module, comprising the battery provided by the first aspect.

[0045] A fourth aspect of the present application provides an electrical device, comprising the battery for providing electrical energy provided by the first aspect or the battery module provided by the third aspect.

[0046] A fifth aspect of the present application provides an energy storage device, comprising the battery provided in the first aspect or the battery module provided in the third aspect, wherein the battery is capable of storing electrical energy and providing electrical energy.

[0047] Utility model effect:

[0048] Through the embodiments of the present application, the battery grouping efficiency and energy density are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0050] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0051] Figure 2 An exploded schematic diagram of a battery module provided in some embodiments of the present application;

[0052] Figure 3 An exploded schematic diagram of a battery provided in some embodiments of the present application;

[0053] Figure 4 A schematic diagram of the structure of a bracket assembly provided in some embodiments of the present application;

[0054] Figure 5 An exploded schematic diagram of a bracket assembly provided in some other embodiments of the present application;

[0055] Figure 6 A schematic diagram of the structure of a bracket assembly provided in some other embodiments of the present application;

[0056] Figure 7 for Figure 6 An exploded schematic diagram of the bracket assembly;

[0057] Figure 8 A partial structural schematic diagram of a bracket assembly provided in some embodiments of the present application;

[0058] Fig. 9 A schematic diagram of a battery structure with the outer shell removed provided in some embodiments of the present application;

[0059] Fig.10 for Fig. 9 A partial cross-sectional schematic diagram of the middle bracket assembly after installation;

[0060] Fig.11 A schematic diagram of a battery structure with the outer shell removed provided in some other embodiments of the present application;

[0061] Fig.12 for Fig.11 An enlarged schematic diagram of the lug connection of the middle electrode assembly;

[0062] Fig.13 for Fig.11 A partial cross-sectional schematic diagram of a middle bracket assembly installed between two adjacent electrode assemblies;

[0063] Fig.14A schematic diagram of a battery structure with the outer shell removed provided in some other embodiments of the present application;

[0064] Fig.15 for Fig.14 An enlarged schematic diagram of the lug connection of the middle electrode assembly;

[0065] Fig.16 for Fig.14 A partial cross-sectional schematic diagram of a middle bracket assembly installed between two adjacent electrode assemblies.

[0066] Description of reference numerals:

[0067] Vehicle 1000; battery module 100; controller 200; motor 300;

[0068] Battery 1; bottom shell 2; upper cover 3;

[0069] Housing 10;

[0070] Electrode assembly 20; body 21; tab 22; first tab 211; second tab 212; folded portion 221; bent portion 222;

[0071] Bracket assembly 50; support portion 51; first support portion 511; second support portion 512; hollow body portion 513; extension portion 514; limit portion 52; first limit portion 521; second limit portion 522; gap 52a; barrier portion 53; liquid flow hole 501; first end 531a; second end 531b;

[0072] The first direction is X; the second direction is Y; the third direction is Z. DETAILED DESCRIPTION

[0073] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0075] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0076] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0077] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0078] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0079] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0080] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0081] In the embodiment of the present application, the battery may be a secondary battery, which refers to a battery that can be continuously used by activating the active material by charging after the battery is discharged.

[0082] The battery 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 storage battery, etc., which is not limited in the embodiments of the present application.

[0083] Batteries generally include an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the battery charging and discharging process, active ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is set between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0084] In some embodiments, the positive electrode may be a positive electrode sheet, and the positive electrode sheet 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.

[0085] As an example, the positive electrode current collector has two surfaces facing each other in its thickness direction, and the positive electrode active material is disposed on either or both of the two facing surfaces of the positive electrode current collector.

[0086] As an example, the positive electrode current collector may be a metal foil or a composite current collector. For example, as the metal foil, aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc., treated with silver surface, may be used. The composite current collector may include a polymer material base and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0087] As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other traditional materials that can be used as positive electrode active materials for batteries may also be used. These positive electrode active materials may be used alone or in combination of two or more. Among them, examples of lithium-containing phosphates may include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also 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 iron manganese phosphate, and a composite material of lithium iron manganese phosphate and carbon.

[0088] In some embodiments, the positive electrode may be a foamed metal. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or a carbon foam. When the foamed metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foamed metal, but of course, the positive electrode active material may also be provided. As an example, a lithium source material, potassium metal or sodium metal may also be filled or / and deposited in the foamed metal, and the lithium source material is lithium metal and / or a lithium-rich material.

[0089] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0090] As an example, the negative electrode current collector may be a metal foil, a foamed metal or a composite current collector. For example, as a metal foil, aluminum or stainless steel treated with silver, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel or titanium, etc. may be used. The composite current collector may include a polymer material base and a metal layer. The foamed metal may be a nickel foam, a copper foam, an aluminum foam, an alloy foam, or carbon foam, etc. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector may be aluminum, and the material of the negative electrode current collector may be copper.

[0091] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0092] In some embodiments, the separator is a separator. The present application has no particular limitation on the type of separator, and any known separator with a porous structure having good chemical stability and mechanical stability can be selected.

[0093] As an example, the main material of the isolation membrane can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramics.

[0094] In some embodiments, the separator is a solid electrolyte, which is disposed between the positive electrode and the negative electrode and serves to transmit ions and isolate the positive and negative electrodes.

[0095] In some embodiments, the battery further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0096] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0097] In some embodiments, the electrode assembly is a laminate structure.

[0098] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0099] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0100] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0101] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0102] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0103] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, or polygonal.

[0104] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0105] In some embodiments, the battery may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0106] As an example, the battery may be a cylindrical battery, a prismatic battery, a soft-pack battery or a battery of other shapes. Prismatic batteries include blade-shaped batteries and polygonal batteries. Polygonal batteries are, for example, hexagonal batteries, etc. There is no particular limitation in the present application.

[0107] In some embodiments, the housing is provided with an opening, and an end cap is provided at the opening, and the end cap closes the opening to form a closed space for accommodating the electrode assembly and electrolyte and other substances. The housing may be provided with one or more openings. One or more end caps may also be provided.

[0108] In some embodiments, at least one electrode terminal is disposed on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal may be directly connected to the tab, or indirectly connected to the tab via a transition component. The electrode terminal may be disposed on the end cap, or on the housing.

[0109] In some embodiments, a pressure relief mechanism is provided on the housing, and is used to release the internal pressure of the battery.

[0110] In some embodiments, the battery module of the present application embodiment includes one or more batteries to provide a single physical module with higher voltage and capacity. When there are multiple batteries, the multiple batteries are connected in series, in parallel or in mixed connection through a busbar. Multiple batteries are arranged and fixed to form a battery module.

[0111] In some embodiments, the battery module may further include a case in which the battery is accommodated.

[0112] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0113] Below, this application is described in detail.

[0114] At present, new energy batteries are increasingly used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are increasingly used in the field of energy storage. In new energy vehicles equipped with batteries, batteries can be used to provide power in whole or in part. In the field of energy storage, batteries can be installed in energy storage boxes or directly on the user side.

[0115] In these application scenarios, in order to meet the actual energy usage needs, it is necessary to increase the energy density of the battery as much as possible. While the existing electrochemical material system remains unchanged, how to improve the battery grouping efficiency is one of the important means to improve the battery volume energy density. Taking energy storage batteries as an example, a battery box is generally composed of multiple battery cells, a battery cluster is composed of multiple battery boxes, and an energy storage battery that meets energy needs is composed of multiple battery clusters. These grouping structures need to be completed through grouping structures at different levels, and grouping structures often take up a large space and reduce the battery energy density. In order to improve the grouping efficiency of energy storage batteries, an embodiment of the present application provides a long battery cell structure to improve the space utilization in the height direction of the battery cells in the battery box.

[0116] In order to achieve a longer battery cell, the embodiment of the present application uses a plurality of electrode assemblies arranged in sequence along the length direction of the battery cell shell to form a long battery. However, during the assembly and transportation of such a long battery, two adjacent electrode assemblies are prone to displacement, resulting in the risk of failure of the electrical connectors between them.

[0117] In this regard, the present application provides a battery, comprising: at least two electrode assemblies, the electrode assemblies including pole tabs, adjacent electrode assemblies being electrically connected via the pole tabs; a bracket assembly is arranged between two adjacent electrode assemblies, the bracket assembly comprising: a supporting portion, the supporting portion being used to support the electrode assembly to form a space to accommodate the pole tabs; a limiting portion being used to accommodate and / or support the pole tabs; wherein the limiting portion comprises a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion being detachable and matingly arranged, and when the first limiting portion and the second limiting portion are matingly arranged, there is a gap between the first limiting portion and the second limiting portion, and the gap is used to accommodate the pole tabs.

[0118] The supporting part supports two adjacent electrode assemblies, and the two limiting parts cooperate with each other to form a gap for accommodating the pole ears, which can not only limit the relative displacement of the two electrode assemblies, but also the two limiting parts form limiting protection for the pole ears, thereby reducing the risk of the pole ears breaking due to squeezing, pulling or undesirable folding, thereby realizing the production application of long batteries and improving the battery grouping efficiency and energy density.

[0119] The application embodiment provides an electric device including the above-mentioned battery or battery module for providing electric energy, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0120] In the following embodiments, for the convenience of description, the electric device of one embodiment of the present application is taken as a vehicle 1000 as an example for description. The following is a description with reference to the accompanying drawings.

[0121] Figure 1 The schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle. Figure 1 As shown, a battery module 100 is disposed inside the vehicle 1000, and the battery module 100 can be disposed at the bottom, head, or tail of the vehicle 1000. The battery module 100 can be used to power the vehicle 1000, for example, the battery module 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery module 100 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0122] In some embodiments of the present application, the battery module 100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0123] like Figure 2 As shown, the battery module 100 includes a box body and at least one battery 1. The box body includes a bottom shell 2 and an upper cover 3. The upper cover 3 is disposed above the bottom shell 2, so as to form a storage space for the battery 1 between the bottom shell 2 and the upper cover 3.

[0124] In the battery module 100, there can be multiple batteries 1, and the multiple batteries 1 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple batteries 1 are both connected in series and in parallel. Multiple battery modules 1 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple batteries 1 is placed in the accommodation space formed between the bottom shell 2 and the upper cover 3; of course, the battery module 100 can also be a battery module in the form of multiple batteries 1 connected in series, in parallel, or in mixed connection, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and are accommodated in the accommodation space formed by the bottom shell 2 and the upper cover 3. The battery module 100 may also include other structures, for example, the battery module 100 may also include a converging component for realizing electrical connection between the multiple batteries 1.

[0125] In the embodiment of the present application, the battery may be a secondary battery, which refers to a battery that can be continuously used by activating active materials by charging after the battery is discharged.

[0126] The battery 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 storage battery, etc., which is not limited in the embodiments of the present application.

[0127] Although not shown in the figure, the battery generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the battery charging and discharging process, active ions (such as lithium ions) are embedded and released back and forth between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, while allowing active ions to pass through.

[0128] In some embodiments, the electrode assembly is provided with tabs (not shown), which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0129] In some embodiments, the battery may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing), or an aluminum-plastic film.

[0130] As an example, the battery can be a cylindrical battery, a prismatic battery, a soft-pack battery or a battery of other shapes. Prismatic batteries include square shell batteries, blade-shaped batteries, and polygonal prismatic batteries. Polygonal prismatic batteries are, for example, hexagonal prismatic batteries, etc. There is no particular limitation in the present application.

[0131] Below, refer to Figures 3 to 16 Some embodiments of the present application are described in detail.

[0132] The embodiment of the present application provides a battery 1, comprising: at least two electrode assemblies 20, the electrode assemblies 20 comprising tabs 22, adjacent electrode assemblies 20 being electrically connected via the tabs 22; and a support assembly 50 disposed between two adjacent electrode assemblies 20. The support assembly 50 comprises: a support portion 51, the support portion 51 being used to support the electrode assembly 20 to form a space for accommodating the tabs; and a limiting portion 52, being used to accommodate and / or support the tabs 22; wherein the limiting portion 52 comprises a first limiting portion 521 and a second limiting portion 522, the first limiting portion 521 and the second limiting portion 522 being detachably and cooperatively arranged, and when the first limiting portion 521 and the second limiting portion 522 are cooperatively arranged, there is a gap 52a between the first limiting portion 521 and the second limiting portion 522, and the gap 52a is used to accommodate the tabs 22.

[0133] At least two electrode assemblies 20 may be arranged in sequence, and two adjacent electrode assemblies 20 along the arrangement direction are connected via tabs 22. At least two electrode assemblies 20 may be connected in parallel or in series. Each electrode assembly 20 may be constructed as a winding structure or a stacked structure.

[0134] As an example, at least two electrode assemblies 20 are accommodated in the housing 10 and arranged in sequence along the length direction (second direction Y) of the housing 10. Each electrode assembly 20 includes a body 21 and a pole ear 22 disposed at the end of the body 21. The pole ear 22 is located between two adjacent body parts 21. The pole ear may include a first pole ear 211 and a second pole ear 212. The electrical polarity of the first pole ear 211 and the second pole ear 212 may be the same or different. The body 21 includes a positive electrode sheet, a negative electrode sheet, and a separator disposed between the positive electrode sheet and the negative electrode sheet. The first pole ear 211 may be connected to the positive electrode sheet, and the second pole ear 212 may be connected to the negative electrode sheet.

[0135] The dimension of the housing 10 in the length direction (second direction Y) is greater than the dimension in the width direction (third direction Z) and greater than the dimension in the height direction (first direction X), thereby forming a so-called blade-shaped housing. Figure 3 As shown, the length of the housing 10 may be in the range of 400 mm to 1400 mm, the width may be in the range of 60 mm to 140 mm, and the height may be in the range of 15 mm to 35 mm. Figure 3 In the example shown, the dimension in the length direction of the shell 10 is the distance between the planes of the two end covers 30 arranged along the second direction Y where the pole positions are not set; the dimension in the width direction is the distance between the two opposite surfaces of the shell along the third direction Z; and the dimension in the height direction is the distance between the two opposite surfaces of the shell 10 along the first direction X.

[0136] The supporting portion 51 of the bracket assembly 50 is used to support the electrode assembly 20 to form a space for accommodating the pole ear; the limiting portion 52 is used to accommodate and / or support the pole ear 22; wherein the limiting portion 52 includes a first limiting portion 521 and a second limiting portion 522, the first limiting portion 521 and the second limiting portion 522 are detachable and matingly arranged, and when the first limiting portion 521 and the second limiting portion 522 are matingly arranged, there is a gap 52a between the first limiting portion 521 and the second limiting portion 522, and the gap 52a is used to accommodate the pole ear 22.

[0137] The first limiting portion 521 and the second limiting portion 522 can be separated and matched, and can be, the first limiting portion 521 and the second limiting portion 522 can be close to each other and matched to each other, forming a gap 52a between the two, and the first limiting portion 521 and the second limiting portion 522 can be separated from each other. The first limiting portion 521 and the second limiting portion 522 can be matched by snap-fit, threaded connection, adsorption connection, etc. or other matching methods.

[0138] The tab 22 is received in the gap 52 a between the first limiting portion 521 and the second limiting portion 522 . The first limiting portion 521 and the second limiting portion 522 can clamp the tab 22 , and have a clamping force on the tab 22 along the thickness direction of the tab, or have no clamping force on the tab 22 .

[0139] The two adjacent electrode assemblies 20 are supported by the support portion 51, and the two limiting portions cooperate with each other to form a gap 52a for accommodating the pole ear 22, which can not only limit the relative displacement of the two electrode assemblies, but also the two limiting portions form limiting protection for the pole ear, thereby reducing the risk of the pole ear being broken or folded and short-circuited due to squeezing or pulling, thereby realizing the production application of long batteries and improving the battery grouping efficiency and energy density.

[0140] In some embodiments, the first limiting portion 521 and the second limiting portion 522 can be arranged in cooperation along the first direction X or along the second direction X to form a gap 52a; the first direction X is perpendicular to the support direction of the electrode assembly 20 supported by the supporting portion 51, and the second direction Y is parallel to the support direction. The second direction Y is perpendicular to the first direction X.

[0141] A support assembly 50 is disposed between each two adjacent electrode assemblies 20 and supported by a support portion 51, so that the plurality of electrode assemblies 20 are arranged in a strip shape along the arrangement direction. The direction in which the support portion 51 supports the electrode assemblies 20 is the same as the arrangement direction. The support assembly 50 is insulated from the electrode assemblies 20, and for example, the support assembly 50 may be a plastic part.

[0142] The first limiting portion 521 and the second limiting portion 522 can be fitted together along a first direction X perpendicular to the supporting direction, so that a gap 52 a for accommodating the tab 22 is formed between the first limiting portion 521 and the second limiting portion 522 .

[0143] The first limiting portion 521 and the second limiting portion 522 can be fitted together along the same direction as the supporting direction, so that a gap 52 a for accommodating the tab 22 is formed by the first limiting portion 521 and the second limiting portion 522 .

[0144] By cooperating the first limiting portion 521 and the second limiting portion 522 in various ways, the assembly is more flexible and can adapt to different tab connection methods.

[0145] In some embodiments, the bracket assembly 50 also includes a blocking portion 53, which is located in the gap 52a to separate the gap 52a into a first gap and a second gap distributed along a third direction Z, and the first gap and the second gap are used to accommodate the first pole ear 211 and the second pole ear 212 of the electrode assembly 20, respectively, and the third direction Z is perpendicular to the first direction X and the second direction Y.

[0146] The barrier portion 53 separates the gap 52a into two gaps for accommodating the first pole tab 211 and the second pole tab 212 of the electrode assembly 20, which can protect the two pole tabs at the same time and can block the two pole tabs 22 with different electrical polarities to reduce the risk of short circuit.

[0147] In some embodiments, the support portion 51 includes a first support portion 511 and a second support portion 512 , the first support portion 511 is configured to be connected to the first limiting portion 521 , and the second support portion 512 is configured to be connected to the second limiting portion 522 .

[0148] The two supporting parts may support the electrode assembly 20 at the same time, or the electrode assembly 20 may be supported by only one of the supporting parts.

[0149] Each limiting part is respectively connected to the supporting part, so the assembly is convenient and the strength is improved.

[0150] Optionally, the first supporting portion 511 and the first limiting portion 521 are an integral structure; the second supporting portion 512 and the second limiting portion 522 are an integral structure.

[0151] In some embodiments, at least one of the first limiting portion 521 , the first supporting portion 511 , the second limiting portion 522 , and the second supporting portion 512 is provided with a liquid flow hole 501 .

[0152] The liquid flow holes 501 are used to accelerate the flow of electrolyte when injecting electrolyte into the shell 10, so that the electrolyte can fully infiltrate each electrode assembly 20, and also play a role in reducing weight, which helps to make the battery lightweight.

[0153] In some embodiments, the first support portion 511 and the second support portion 512 are detachably connected so that the first limiting portion 521 and the second limiting portion 522 can be separated and matched.

[0154] The first support portion 511 and the second support portion 512 can be detachably connected by snap connection, threaded connection, magnetic adsorption connection or other methods.

[0155] The first and second limiting portions 521 and 522 can be separated and matched by detachably connecting the first and second supporting portions 511 and 512 , so that most of the structures of the first and second limiting portions 521 and 522 can protect the pole lug 22 and reduce interference with the pole lug 22 .

[0156] In some embodiments, both the first limiting portion 521 and the second limiting portion 522 are provided with a blocking portion 53 , and the two blocking portions 53 protrude toward each other and abut against each other.

[0157] The two blocking portions 53 provide more space for the first limiting portion 521 and the second limiting portion 522 to cooperate to form the gap 52a, and can block two tabs with different electrical polarities to reduce the risk of short circuit.

[0158] As an example, see Figure 4 , Figure 5 and Figure 8 , the two blocking portions 53 protrude toward the first direction X and abut against each other. Figure 6 The two blocking portions 53 protrude toward the second direction Y and abut against each other.

[0159] In some embodiments, reference Figure 4 Along the third direction Z, the opposite ends of the first limiting portion 521 are respectively connected to the first supporting portion 511, and the opposite ends of the second limiting portion 522 are respectively connected to the second supporting portion 512. Along the second direction Y, the opposite ends of the first supporting portion 511 both protrude from the first limiting portion 521, and the opposite ends of the second supporting portion 512 both protrude from the second limiting portion 522.

[0160] Along the second direction Y, the support parts located at both ends of the limiting part are higher than the limiting part, avoiding interference between the limiting part and the root of the pole ear 22 or the main body 21 of the electrode assembly 20, and such a structure can enhance the overall strength of the bracket assembly 50 and provide reliable support and protection for the electrode assembly 20.

[0161] In some embodiments, reference Figure 5 The first support portion 511 and the second support portion 512 both include a hollow main body portion 513 and an extension portion 514, each hollow main body portion 513 includes a first end 531a and a second end 531b located on opposite sides in the second direction Y, and each extension portion 514 is arranged at the second end 531b. When the first support portion 511 is connected to the second support portion 512, the extension portion 514 of the first support portion 511 is covered on the first end 531a of the second support portion 512, and the extension portion 514 of the second support portion 512 is covered on the first end 531a of the first support portion 511.

[0162] The structure of the support part is a hollow structure, which reduces the weight of the bracket assembly 50 and is beneficial to the lightweight of the battery 1. The first support part 511 is connected to the second support part 512, and the support area is increased by the expansion part 514, so that the support is more stable.

[0163] In some embodiments, the first limiting portion 521 and the second limiting portion 522 can be separated and matched along the first direction X, and the gap 52a is configured to have an escape opening that passes through along the second direction Y.

[0164] Thus, the support assembly 50 can cooperate along the first direction X perpendicular to the arrangement direction (second direction Y) of the electrode assembly 20 to support the electrode assembly 20 and protect the electrode tab 22 .

[0165] Refer to Figure 4 , Fig. 9 and Fig.10 The tabs 22 of two adjacent electrode assemblies 20 extend along the second direction Y and are connected to each other. The tabs 22 pass through the avoidance opening that runs through the second direction Y and are located in the gap 52a.

[0166] The tabs 22 of two adjacent electrode assemblies 20 extend along the second direction Y to form a non-bending tab. When the bracket assembly 50 is installed, along the first direction X, the first limiting portion 521 and the second limiting portion 522 are separated from each other and respectively located on opposite sides of the tab 22 and aligned with each other. Then, the first limiting portion 521 and the second limiting portion 522 move closer to each other along the first direction X, so that the first limiting portion 521 and the second limiting portion 522 are installed in cooperation between the two adjacent electrode assemblies 20. Since the gap 52a formed by the cooperation of the first limiting portion 521 and the second limiting portion 522 has a through-hole along the second direction Y, the through-hole can avoid the non-bending tab 22 and accommodate the non-bending tab 22 in the gap 52a.

[0167] Therefore, the bracket assembly 50 can be easily installed between two electrode assemblies 20 that are connected without bent electrode tabs, thereby protecting the electrode tabs 22 .

[0168] In some embodiments, the first limiting portion 521 and the second limiting portion 522 can be separated and matched along the second direction Y, and the gap 52a is configured to have an escape opening that opens toward at least one side of the first direction X.

[0169] The gap 52a may be open (open) on one side in the first direction X and closed on the other side; or may be open on both sides in the first direction X so that the avoidance opening is continuous along the first direction X.

[0170] Therefore, the bracket assembly 50 can cooperate along the same direction as the arrangement direction of the electrode assembly 20 (the second direction Y) to support the electrode assembly 20 and protect the electrode tab 22.

[0171] Refer to Figure 6 , Figure 7 , Figure 11-13 The electrode ears 22 of two adjacent electrode assemblies 20 each include a gathering portion 221 and a bending portion 222. The gathering portion 221 is connected between the main body portion 21 and the bending portion 22 of the corresponding electrode assembly 20. The bending portion 22 is bent relative to the gathering portion 221. The bending portions 22 of two adjacent electrode assemblies 20 both extend along the same side of the first direction X and are connected to each other. The bending portion 222 passes through the avoidance opening and is located in the gap 52a.

[0172] The bent pole ear can reduce the space occupied between two adjacent electrode assemblies 20, which is beneficial to the improvement of the volume energy density of the battery. When installing the bracket assembly 50, the first limiting portion 521 and the second limiting portion 522 can be first connected together along the second direction Y, and then the avoidance direction of the gap 52a formed between the first limiting portion 521 and the second limiting portion 522 is directed toward the pole ear 22, and the bracket assembly 50 is moved along the first direction X and placed between two adjacent electrode assemblies 20, and the bent pole ear 22 passes through the avoidance and is received in the gap 52a.

[0173] Therefore, the bracket assembly 50 can be easily installed between two electrode assemblies 20 having electrode tabs bent in the same direction, thereby protecting the electrode tabs 22 .

[0174] In some embodiments, the first limiting portion 521 and the second limiting portion 522 can be separated and matched along the first direction X, and the gap 52a is configured to have avoidance openings opening toward opposite sides of the first direction X respectively.

[0175] Thus, the support assembly 50 can cooperate along the first direction X perpendicular to the arrangement direction (second direction Y) of the electrode assembly 20 to support the electrode assembly 20 and protect the electrode tab 22 .

[0176] Refer to Figure 8 , Figure 14-16 The electrode ears 22 of two adjacent electrode assemblies 20 each include a gathering portion 221 and a bending portion 222. The gathering portion 221 is connected between the main body portion 21 and the bending portion 222 of the corresponding electrode assembly 20. The bending portion 222 is bent relative to the gathering portion 221. The bending portions 222 of the two adjacent electrode assemblies 20 extend along opposite sides of the first direction X and are connected to each other. Each bending portion 222 passes through the two openings of the avoidance opening and is located in the gap 52a.

[0177] When the bracket assembly 50 is installed, along the first direction X, the first limiting portion 521 and the second limiting portion 522 are separated from each other and respectively located on opposite sides of the pole lug 22 and aligned with each other. Then, the first limiting portion 521 and the second limiting portion 522 move closer to each other along the first direction X, so that the first limiting portion 521 and the second limiting portion 522 are installed in cooperation between two adjacent electrode assemblies 20. Since the gap 52a formed by the cooperation of the first limiting portion 521 and the second limiting portion 522 has an avoidance opening opened on opposite sides along the second direction Y, the avoidance opening avoids the two pole lugs 22. As a result, the two bending portions 222 extending on opposite sides of the first direction X can be easily accommodated in the gap 52a.

[0178] In some embodiments, the battery further includes an end cap 30, which is disposed at at least one open end of the housing 10 along the second direction. A positive terminal 41 and a negative terminal 42 are disposed on the end cap 30, and the positive terminal 41 and the negative terminal 42 are connected to the positive electrode tab and the negative electrode tab of the electrode assembly 20, respectively.

[0179] The embodiment of the present application further provides a bracket assembly 50 , and the specific contents of the bracket assembly 50 have been described in detail above and will not be repeated here.

[0180] An embodiment of the present application also provides a battery module, which includes the battery mentioned in any of the above embodiments.

[0181] An embodiment of the present application also provides an electrical device, comprising a battery or a battery module as mentioned in any of the above embodiments for providing electrical energy.

[0182] An embodiment of the present application also provides an energy storage device, characterized in that it includes a battery or a battery module as mentioned in any of the above embodiments, and the battery can store electrical energy and provide electrical energy.

[0183] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: At least two electrode assemblies, each of which comprises a tab, and adjacent electrode assemblies are electrically connected via the tab; A support assembly is disposed between two adjacent electrode assemblies; The bracket assembly comprises: A support portion, the support portion being used to support the electrode assembly to form a space for accommodating the electrode tab; and A limiting portion, the limiting portion is used to accommodate and / or support the tab; Among them, the limiting part includes a first limiting part and a second limiting part, the first limiting part and the second limiting part are detachable and cooperatively arranged, and when the first limiting part and the second limiting part are cooperatively arranged, there is a gap between the first limiting part and the second limiting part, and the gap is used to accommodate the pole ear.

2. The battery according to claim 1, characterized in that The first limiting portion and the second limiting portion can be arranged in cooperation along a first direction or along a second direction to form the gap; the first direction is perpendicular to the supporting direction of the electrode assembly supported by the supporting portion, and the second direction is parallel to the supporting direction.

3. The battery according to claim 2, characterized in that The bracket assembly also includes a blocking portion, which is located in the gap to separate the gap into a first gap and a second gap distributed along a third direction, the first gap and the second gap are used to accommodate the first pole ear and the second pole ear of the electrode assembly respectively, and the third direction is perpendicular to the first direction and the second direction.

4. The battery according to any one of claims 2 or 3, characterized in that: The support portion includes a first support portion and a second support portion, the first support portion is configured to be connected to the first limiting portion, and the second support portion is configured to be connected to the second limiting portion.

5. The battery according to claim 4, characterized in that A liquid flow hole is provided in at least one of the first limiting portion, the first supporting portion, the second limiting portion and the second supporting portion.

6. The battery according to claim 4, characterized in that The first supporting portion and the second supporting portion are detachably connected so that the first limiting portion and the second limiting portion can be separated and matched.

7. The battery according to claim 2 or 3, characterized in that: The first limiting portion and the second limiting portion can be separated and matched along a first direction. The gap is configured to have an escape opening penetrating along the second direction.

8. The battery according to claim 2 or 3, characterized in that: The first limiting portion and the second limiting portion can be separated and matched along the second direction. The gap is configured to have an escape opening opened toward at least one side of the first direction.

9. The battery according to claim 2 or 3, characterized in that: The first limiting portion and the second limiting portion can be separated and matched along a first direction. The gap is configured to have escape openings opened toward opposite sides of the first direction.

10. The battery according to claim 3, characterized in that Both the first limiting portion and the second limiting portion are provided with the blocking portion, and the two blocking portions protrude toward each other and abut against each other.

11. The battery according to claim 4, characterized in that Along the third direction, opposite ends of the first limiting portion are respectively connected to the first supporting portion, and opposite ends of the second limiting portion are respectively connected to the second supporting portion. Along the second direction, two opposite ends of the first supporting portion both protrude from the first limiting portion, and two opposite ends of the second supporting portion both protrude from the second limiting portion.

12. The battery according to claim 4, characterized in that The first supporting portion and the second supporting portion each include a hollow body portion and an extension portion, each of the hollow body portions includes a first end and a second end located at opposite sides in the second direction, and each of the extension portions is disposed at the second end. When the first supporting part and the second supporting part are connected, the extension part of the first supporting part covers the first end of the second supporting part, and the extension part of the second supporting part covers the first end of the first supporting part.

13. The battery according to claim 7, characterized in that The pole tabs of two adjacent electrode assemblies extend along the second direction and are connected to each other, and the pole tabs pass through the avoidance opening.

14. The battery according to claim 8, characterized in that The electrode ears of two adjacent electrode assemblies each include a gathered portion and a bent portion, the gathered portion is connected between the body portion and the bent portion of the corresponding electrode assembly, the bent portion is bent relative to the gathered portion, and the bent portions of the two adjacent electrode assemblies both extend along the same side of the first direction and are connected to each other. The bent portion passes through the avoidance opening and is located in the gap.

15. The battery according to claim 9, characterized in that The electrode ears of two adjacent electrode assemblies each include a gathered portion and a bent portion, the gathered portion is connected between the body portion and the bent portion of the corresponding electrode assembly, the bent portion is bent relative to the gathered portion, and the bent portions of the two adjacent electrode assemblies extend along opposite sides of the first direction and are connected to each other. Each of the bent portions passes through openings on both sides of the avoidance opening and is located in the gap.

16. A bracket assembly, characterized in that: include: A support portion, the support portion being used to support the electrode assembly to form a space for accommodating a tab of the electrode assembly; and A limiting portion, the limiting portion is used to accommodate and / or support the tab; Among them, the limiting part includes a first limiting part and a second limiting part, the first limiting part and the second limiting part are detachable and cooperatively arranged, and when the first limiting part and the second limiting part are cooperatively arranged, there is a gap between the first limiting part and the second limiting part, and the gap is used to accommodate the pole ear.

17. The bracket assembly according to claim 16, characterized in that: The first limiting portion and the second limiting portion can be arranged in cooperation along a first direction or along a second direction to form the gap; the first direction is perpendicular to the supporting direction of the electrode assembly supported by the supporting portion, and the second direction is parallel to the supporting direction.

18. The bracket assembly according to claim 17, characterized in that The bracket assembly also includes a blocking portion, which is located in the gap to separate the gap into a first gap and a second gap distributed along a third direction, the first gap and the second gap are used to accommodate the first pole ear and the second pole ear of the electrode assembly respectively, and the third direction is perpendicular to the first direction and the second direction.

19. The bracket assembly according to any one of claims 16 to 18, characterized in that: The support portion includes a first support portion and a second support portion, the first support portion is configured to be connected to the first limiting portion, and the second support portion is configured to be connected to the second limiting portion.

20. The bracket assembly according to claim 19, characterized in that The first supporting portion and the second supporting portion are detachably connected so that the first limiting portion and the second limiting portion can be separated and matched.

21. The bracket assembly according to claim 17 or 18, characterized in that: The first limiting portion and the second limiting portion can be separated and matched along a first direction. The gap is configured to have an escape opening penetrating along the second direction.

22. The bracket assembly according to claim 17 or 18, characterized in that: The first limiting portion and the second limiting portion can be separated and matched along the second direction. The gap is configured to have an escape opening opened toward at least one side of the first direction.

23. The bracket assembly according to claim 17 or 18, characterized in that: The first limiting portion and the second limiting portion can be separated and matched along a first direction. The gap is configured to have escape openings opened toward opposite sides of the first direction.

24. A battery module, characterized in that: Comprising the battery according to any one of claims 1 to 15.

25. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 1 to 15 or the battery module according to claim 24 for providing electrical energy.

26. An energy storage device, characterized in that: The invention comprises the battery according to any one of claims 1 to 15 or the battery module according to claim 24, wherein the battery is capable of storing electric energy and providing electric energy.

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