Battery, separator, and electric device

Abstract

The embodiment of the invention provides a battery, a spacer and an electric device. A battery includes: a case (21); an electrode assembly (22); and the spacer (24) is arranged between the shell (21) and the electrode assembly (22), the spacer (24) comprises a first spacer plate (241) and a second spacer plate (242), the first spacer plate (241) is arranged towards the electrode assembly (22), one end of the second spacer plate (242) is connected to the first surface of the first spacer plate (241), and the other end of the second spacer plate (242) extends out towards the facing direction of the first surface. According to the technical scheme, the distance piece is arranged between the shell and the electrode assembly of the battery, on one hand, the possibility of direct hard contact between the shell and the electrode assembly can be reduced, and on the other hand, the supporting and buffering effects can be provided between the shell and the electrode assembly, so that the damage to the shell caused by external force on the shell of the battery is reduced. The influence on the internal electrode assembly is avoided, and the use reliability of the battery is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of battery technology, and more specifically, to a battery, a spacer, and an electrical device. Background Art

[0002] With the development of the times, electric vehicles have great market prospects due to their high environmental protection, low noise, low cost and other advantages. They can effectively promote energy conservation and emission reduction, and are beneficial to the development and progress of society. For electric vehicles, battery technology is an important factor related to their development.

[0003] In the development of battery technology, in addition to the need to pay attention to the battery's electrical performance such as charging and discharging, it is also necessary to pay attention to abnormal conditions that may occur during the battery's operation, such as the impact and influence of external forces that the battery may be subjected to in the electrical device. In view of this, how to reduce the impact of external forces on the battery and improve the reliability of the battery is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application provide a battery, a spacer, and an electrical device, which can improve the reliability of the battery.

[0005] In a first aspect, a battery is provided, comprising: a shell; an electrode assembly accommodated in the shell; a spacer arranged between the shell and the electrode assembly, the spacer comprising a first spacer and a second spacer, the first spacer being arranged toward the electrode assembly, one end of the second spacer being connected to a first surface of the first spacer, and the other end of the second spacer extending toward a direction facing the first surface.

[0006] Through the technical solution of the embodiment of the present application, a spacer is arranged between the battery shell and the electrode assembly. The first spacer and the second spacer in the spacer are interconnected and intersected. On the one hand, the two can reduce the possibility of direct hard contact between the shell and the electrode assembly. On the other hand, they can also provide support and buffering between the shell and the electrode assembly, thereby reducing the impact of external force on the internal electrode assembly when acting on the battery shell, thereby improving the reliability of battery use.

[0007] In some possible implementations, the first surface is a surface of the first separator that faces away from the electrode assembly.

[0008] Through the technical solution of this embodiment, on the one hand, the first spacer can be easily attached to the electrode assembly to provide a more comprehensive support for the electrode assembly, and on the other hand, the second spacer can provide a buffer space between the first spacer and the battery shell, thereby effectively buffering the external stress. In this embodiment, the spacer can provide better support and buffering functions for the electrode assembly, thereby greatly improving the reliability of the battery.

[0009] In some possible implementations, the spacer includes: a plurality of second spacer plates, and the plurality of second spacer plates are arranged and distributed on the first spacer plate.

[0010] Through the technical solution of this embodiment, the plurality of second spacers can provide a more comprehensive and stable support and buffering effect between the battery shell and the electrode assembly, thereby further improving the reliability of the battery.

[0011] In some possible implementations, a plurality of second spacer plates are arranged at equal intervals on the first spacer plate.

[0012] In this embodiment, the distance between any two adjacent second spacers among the multiple second spacers can be a fixed value. The multiple second spacers can provide relatively uniform support and buffering between the battery shell and the electrode assembly, and reduce the possibility of stress concentration in a local area of ​​the electrode assembly, thereby further improving the reliability of the battery.

[0013] In some possible implementations, a plurality of second spacer plates are arranged parallel to each other.

[0014] Through the technical solution of this embodiment, the arrangement of the plurality of second spacers on the first spacer is relatively regular, and the overall shape of the spacer is also relatively regular, so it is easy to install in the battery without causing extra waste of space in the battery. Furthermore, the plurality of second spacers are parallel to each other, and the plurality of second spacers can provide relatively uniform support and buffering for the electrode assembly in the battery, which is conducive to further improving the reliability of the battery.

[0015] In some possible implementations, a distance P between two adjacent second spacer plates among the plurality of second spacer plates satisfies 0.5 mm≤P≤50 mm.

[0016] By designing the distance P between two adjacent second spacers among the plurality of second spacers within a suitable threshold range, the support effect and buffering effect of the spacer can be comprehensively improved. Specifically, the distance P between two adjacent second spacers is designed to be greater than or equal to 0.5 mm, so that there is a certain deformation space between the two adjacent second spacers, which is convenient for providing a buffering function for the electrode assembly. In addition, the distance P between two adjacent second spacers is designed to be less than or equal to 50 mm, so that the distance between the two adjacent second spacers is relatively compact, which is convenient for providing a good support effect for the electrode assembly.

[0017] In some possible implementations, an angle α between one of the surfaces of the second partition plate and the first surface of the first partition plate satisfies 120°≤α≤170°.

[0018] Through the technical solution of this embodiment, the angle α between the second spacer and the first spacer in the spacer is designed to be within a suitable threshold range, which can further comprehensively improve the buffering effect of the spacer and reduce the space required for the spacer to be occupied in the battery. Specifically, the angle α between the second spacer and the first spacer is designed to be less than or equal to 170°, which is conducive to increasing the buffering space between the shell and the electrode assembly of the spacer and improving the buffering effect of the spacer. In addition, the angle α between the second spacer and the first spacer is designed to be greater than or equal to 120°. When the battery is subjected to stress, the abutment area between the second spacer and the first spacer and the shell can be increased, the structural stability of the second spacer is improved, and the space occupied by the second spacer in the battery is reduced.

[0019] In some possible implementations, 135°≤α≤150°.

[0020] Through the technical solution of this embodiment, when 135°≤α≤150°, the overall performance of the spacer is better, and the buffering effect of the spacer can be comprehensively improved to a large extent and the space occupied by the spacer in the battery can be reduced.

[0021] In some possible implementations, the spacer is disposed in the first direction of the electrode assembly, and a dimension H of the spacer in the first direction satisfies 1 mm ≤ H ≤ L / 10, where L is a dimension of the battery in the first direction.

[0022] Through the technical solution of this embodiment, when the spacer is arranged in the first direction of the electrode assembly, the dimension H of the spacer in the first direction is designed to be within a suitable threshold range, which can further comprehensively improve the buffering effect of the spacer and reduce the space required for the spacer in the battery. Specifically, the dimension H of the spacer in the first direction is designed to be less than or equal to L / 10, which can reduce the space required for the spacer in the battery, thereby improving the capacity and energy density of the battery. In addition, the dimension H of the spacer in the first direction is designed to be greater than or equal to 1mm, so that the spacer can provide a suitable buffer space between the housing and the electrode assembly to improve the buffering effect of the spacer.

[0023] In some possible implementations, at least one of the first spacer plate and the second spacer plate includes an insulating plate.

[0024] Through the technical solution of this embodiment, a first spacer and / or a second spacer including an insulating plate is arranged between the battery shell and the electrode assembly, which can reduce the transmission of metal ions between the electrode assembly and the metal shell, thereby reducing the possibility of corrosion of the metal shell by the electrode assembly, and further improving the reliability and service life of the battery.

[0025] In some possible implementations, a material of at least one of the first spacer plate and the second spacer plate includes an elastic material.

[0026] Through the technical solution of this embodiment, the elastic first spacer and / or the second spacer can provide a good elastic buffering effect inside the battery.

[0027] In some possible implementations, the stiffness of the first spacer plate is smaller than the stiffness of the second spacer plate, and the toughness of the first spacer plate is greater than the toughness of the second spacer plate.

[0028] Through the technical solution of this embodiment, the first spacer is relatively soft, and the first spacer can be attached to the electrode assembly, shrinking with the electrode assembly, with little impact on the electrode assembly, and the first spacer has strong toughness, so it is not easy to break, which can improve the reliability and service life of the first spacer. In addition, the second spacer is relatively hard, so the second spacer can play a good supporting role for the first spacer and the electrode assembly, and the overall structure is more stable.

[0029] In some possible implementations, the stiffness of the first spacer plate is greater than the stiffness of the second spacer plate, and the toughness of the first spacer plate is less than the toughness of the second spacer plate.

[0030] Through the technical solution of this embodiment, the first spacer is relatively hard and can provide good support for the electrode assembly. The second spacer is relatively soft and has strong toughness, which is conducive to improving the buffering effect of the second spacer and providing a larger shrinkage space for the electrode assembly inside the battery housing.

[0031] In some possible implementations, the spacer further includes: a third spacer plate, one end of which is connected to a second surface of the first spacer plate opposite to the first surface, and the other end of the third spacer plate extends toward the direction of the second surface.

[0032] Through the technical solution of this embodiment, the spacer may include: a first spacer, a second spacer and a third spacer at the same time. The spacer may be similar to a "fishbone" shape. The "fishbone" shaped spacer may have better supporting and buffering effects, which is beneficial to further improve the overall performance of the battery.

[0033] In some possible implementations, the spacer includes: a plurality of third spacer plates, and the plurality of third spacer plates are arranged and distributed on the first spacer plate.

[0034] Through the technical solution of this embodiment, the plurality of third spacers can further provide a more comprehensive and stable support and buffering effect between the battery shell and the electrode assembly, thereby further improving the reliability of the battery.

[0035] In some possible implementations, an arrangement mode of the plurality of third spacers on the first spacer plate is the same as an arrangement mode of the plurality of second spacers on the first spacer plate.

[0036] Through the technical solution of this embodiment, the second partition plate and the third partition plate arranged on both sides of the first partition plate have the same arrangement, so the force on both sides of the first partition plate is more uniform, which can reduce the stress concentration on one side of the first partition plate and improve the overall reliability of the spacer.

[0037] In some possible implementations, the third partition plate and the second partition plate are symmetrically arranged relative to the first partition plate.

[0038] Through the technical solution of this embodiment, the spacer is an axisymmetric "fishbone"-shaped component, which can play a relatively symmetrical and uniform supporting and buffering effect between the electrode assembly and the shell of the battery, thereby helping to further improve the overall performance of the battery.

[0039] In some possible implementations, the third spacer plate includes an insulating plate.

[0040] Through the technical solution of this embodiment, a third spacer including an insulating plate is arranged between the battery shell and the electrode assembly, which can reduce the transmission of metal ions between the electrode assembly and the metal shell, thereby reducing the possibility of corrosion of the metal shell by the electrode assembly, and further improving the reliability and service life of the battery.

[0041] In some possible implementations, the spacer is disposed in the gravity direction of the electrode assembly.

[0042] In this embodiment, when the battery is susceptible to stress from the direction of gravity, the spacer can effectively resist and buffer the stress, thereby reducing the impact of the stress on the electrode assembly. As an example, when the battery is installed on the chassis of a vehicle, the spacer can effectively resist and buffer the stress caused by foreign objects such as flying rocks from under the vehicle, thereby improving the reliability and service life of the battery in the vehicle.

[0043] In some possible implementations, the battery includes: a plurality of spacers, wherein the plurality of spacers are respectively arranged in a gravity direction and an anti-gravity direction of the electrode assembly.

[0044] Through the technical solution of this embodiment, a plurality of spacers are arranged in the battery, and the plurality of spacers can protect the electrode assembly in the battery in multiple directions, thereby further improving the reliability and service life of the battery. In addition, when the battery is applied to an electrical device, for example, when the battery is applied to a vehicle, the battery is prone to vibration in the direction of gravity and the direction of anti-gravity, and thus the battery is prone to stress in the direction of gravity and the direction of anti-gravity. Arranging a plurality of spacers in the direction of gravity and the direction of anti-gravity of the electrode assembly in the battery, respectively, is conducive to further resisting and buffering the influence of stress in the direction of gravity and the direction of anti-gravity on the electrode assembly, and improving the reliability and service life of the battery in the vehicle.

[0045] In some possible implementations, the electrode assembly is a laminated electrode assembly, and the first spacer plate in the spacer is disposed toward a stacking surface of the laminated electrode assembly.

[0046] Through the technical solution of this embodiment, the spacer is applied to a battery including a laminated electrode assembly. The spacer can play a good spacing and buffering role between the stacking surface of the laminated electrode assembly and the shell of the battery, and no hard contact will occur between the stacking surface and the shell. The spacer can reduce the impact of external stress on the stacking surface of the laminated electrode assembly, thereby reducing the possibility of overlap between the positive and negative electrode sheets on the stacking surface due to external force, thereby improving the reliability of the battery.

[0047] In a second aspect, a spacer is provided, comprising: a first spacer plate and a second spacer plate, wherein one end of the second spacer plate is connected to a first surface of the first spacer plate, and the other end of the second spacer plate extends toward a direction of the first surface.

[0048] In some possible implementations, the spacer includes: a plurality of second spacer plates, and the plurality of second spacer plates are arranged and distributed on the first spacer plate.

[0049] In some possible implementations, a plurality of second spacer plates are arranged at equal intervals on the first spacer plate.

[0050] In some possible implementations, a plurality of second spacer plates are arranged parallel to each other.

[0051] In some possible implementations, a distance P between two adjacent second spacer plates among the plurality of second spacer plates satisfies 0.5 mm≤P≤50 mm.

[0052] In some possible implementations, an angle α between one of the surfaces of the second partition plate and the first surface of the first partition plate satisfies 120°≤α≤170°.

[0053] In some possible implementations, at least one of the first spacer plate and the second spacer plate includes an insulating plate.

[0054] In some possible implementations, a material of at least one of the first spacer plate and the second spacer plate includes an elastic material.

[0055] In some possible implementations, the spacer further includes: a third spacer plate, one end of the third spacer plate is connected to a second surface of the first spacer plate opposite to the first surface, and the other end of the third spacer plate extends toward the direction of the second surface.

[0056] In some possible implementations, the spacer includes: a plurality of third spacer plates, and the plurality of third spacer plates are arranged and distributed on the first spacer plate.

[0057] In some possible implementations, an arrangement mode of the plurality of third spacers on the first spacer plate is the same as an arrangement mode of the plurality of second spacers on the first spacer plate.

[0058] In some possible implementations, the third partition plate and the second partition plate are symmetrically arranged relative to the first partition plate.

[0059] In a third aspect, an electrical device is provided, comprising: the battery in the first aspect or any possible implementation manner of the first aspect, wherein the battery is used to provide electrical energy to the electrical device.

[0060] Through the technical solution of the embodiment of the present application, a spacer is arranged between the battery shell and the electrode assembly. The first spacer and the second spacer in the spacer are interconnected and intersected. On the one hand, the two can reduce the possibility of direct hard contact between the shell and the electrode assembly. On the other hand, they can also provide support and buffering between the shell and the electrode assembly, thereby reducing the impact of external force on the internal electrode assembly when acting on the battery shell, thereby improving the reliability of battery use. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0062] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0063] Figure 2 This is a schematic diagram of the structure of a battery provided in one embodiment of the present application;

[0064] Figure 3is another structural schematic diagram of a battery provided by an embodiment of the present application;

[0065] Figure 4 This is a schematic diagram of the structure of a spacer provided in one embodiment of the present application;

[0066] Figure 5 is a schematic side view of a spacer provided in one embodiment of the present application;

[0067] Figure 6 is another structural schematic diagram of a battery provided by an embodiment of the present application;

[0068] Figure 7 is another structural schematic diagram of a spacer provided in one embodiment of the present application;

[0069] Figure 8 Schematic diagram of another structure of a battery provided in one embodiment of the present application.

[0070] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0071] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0072] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0073] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0074] The term "and / or" in this application 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, A and B exist at the same time, and B exists. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0075] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", "third", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0076] Reference to "embodiments" in this application 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 in this application may be combined with other embodiments.

[0077] In the field of new energy, the importance of batteries as the main power source for electrical devices such as electric vehicles, ships or spacecraft is self-evident. In the present application, the battery may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. In some related technologies, the battery may also be referred to as a battery cell or a battery core. In a specific implementation, one or more batteries may form a battery module or a battery pack to provide a higher voltage and capacity to the electrical device. Optionally, the battery pack may include a casing for encapsulating one or more batteries. The casing can reduce the effect of liquid or other foreign matter on the charging or discharging of the battery.

[0078] In the present application, the battery can be cylindrical, flat, rectangular or other shapes, etc., and the present application embodiment does not limit this. In addition, batteries are generally divided into three types according to the packaging method: cylindrical batteries, square batteries and soft-pack batteries, and the present application embodiment does not limit this.

[0079] The development of battery technology must consider many design factors at the same time. For example, in order to improve the charging and discharging performance of the battery, it is necessary to consider various types of performance parameters such as the battery's energy density, cycle life, discharge capacity, and charge and discharge rate. In addition, attention must be paid to abnormal conditions that may occur during the operation of the battery, such as the impact and influence of external forces that the battery may be subjected to in the electrical device. In some application scenarios, the battery is installed in the vehicle. For example, the battery can be installed in the chassis of the vehicle. During the driving of the vehicle, the chassis may be subjected to external stress caused by flying stones, etc. This external stress may cause certain impacts and influences on the battery on the chassis.

[0080] In the relevant design, the battery generally includes a shell, an electrode assembly and an electrolyte, wherein the shell can be used to accommodate the electrode assembly and the electrolyte, the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator, and the electrolyte as an electrolyte can conduct ions between the positive electrode sheet and the negative electrode sheet of the electrode assembly, thereby realizing the normal operation of the battery. For lithium batteries, the electrolyte may include lithium salts and organic solvents.

[0081] In some batteries, the electrode assembly will directly contact the battery shell. When the battery shell is subjected to external stress, the electrode assembly contained in the shell is also easily affected by the stress, causing the risk of overlapping of the positive and negative electrodes. In addition, the negative electrode in the electrode assembly is also prone to corrosion due to direct (direct contact between the two) or indirect (transmission through electrolyte) contact with the metal battery shell. This will cause the metal shell of the battery to reduce its strength due to corrosion, reducing the reliability, service life and safety of the battery.

[0082] In view of this, an embodiment of the present application provides a battery, including a shell, an electrode assembly and a spacer, wherein the electrode assembly is accommodated in the shell, the spacer is arranged between the shell and the electrode assembly, and the spacer includes a first spacer and a second spacer, the first spacer is arranged toward the electrode assembly, one end of the second spacer is connected to the first surface of the first spacer, and the other end of the second spacer extends toward the direction of the first surface. Through the technical solution of the embodiment of the present application, a spacer is arranged between the shell and the electrode assembly of the battery, and the first spacer and the second spacer in the spacer are connected and intersected with each other, which can reduce the possibility of direct hard contact between the shell and the electrode assembly on the one hand, and provide support and buffering between the shell and the electrode assembly on the other hand, thereby reducing the impact of external force on the internal electrode assembly when acting on the battery shell, and improving the reliability of the battery.

[0083] The technical solutions described in the embodiments of the present application are applicable to various devices using batteries, such as electric vehicles, electric bicycles, electric tools, ships and spacecraft, among which spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0084] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the devices described above, but can also be applied to all devices using batteries. However, for the sake of simplicity, the following embodiments are described using electric vehicles as examples.

[0085] For example, Figure 1 As shown, it is a schematic diagram of the structure of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 11, a controller 12 and a battery pack 10 may be arranged inside the vehicle 1. The controller 12 is used to control the battery pack 10 to supply power to the motor 11. For example, a battery pack 10 may be arranged at the bottom, front or rear of the vehicle 1. The battery pack 10 may be used to power the vehicle 1. For example, the battery pack 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements of the vehicle 1 during startup, navigation and operation. In another embodiment of the present application, the battery pack 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0086] In order to meet different power requirements, the battery pack 10 may include a plurality of batteries, wherein the plurality of batteries may be connected in series, in parallel or in hybrid connection, wherein hybrid connection refers to a mixture of series connection and parallel connection. The battery may also be referred to as a battery cell. Optionally, a plurality of battery cells may be connected in series, in parallel or in hybrid connection to form a battery module, and a plurality of battery modules may be connected in series, in parallel or in hybrid connection to form a battery pack. In other words, a plurality of battery cells may be directly connected to form a battery pack, or may be first connected to form a battery module, and then the battery modules may be connected to form a battery pack.

[0087] Figure 2 A structural schematic diagram of a battery 20 provided in one embodiment of the present application is shown.

[0088] like Figure 2 As shown, the battery 20 includes an electrode assembly 22 and a housing 21, and the housing 21 may include a main housing 211 and a cover plate 212. The wall of the main housing 211 and the cover plate 212 are both referred to as the wall of the battery 20.

[0089] The electrode assembly 22 is composed of a positive electrode sheet, a negative electrode sheet and a separator. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer. The current collector not coated with the positive electrode active material layer serves as a positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The current collector not coated with the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer. The current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current is passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the separator may be polypropylene (PP) or polyethylene (PE), etc. In addition, the electrode assembly 22 may be a winding structure or a stacked structure, but the present application is not limited thereto.

[0090] The main housing 211 is determined according to the shape of the positive electrode sheet, the negative electrode sheet and the separator in the electrode assembly 22. For example, the main housing 211 may be a hollow cuboid, a cube or a cylinder, and at least one surface of the main housing 211 has an opening so that the electrode assembly 22 can be placed in the main housing 211. For example, Figure 2 As shown, when the main housing 211 is a hollow cuboid or a cube, two opposite faces of the main housing 211 are open faces, that is, the plane has no wall, so that the inside and outside of the main housing 211 are connected. The two cover plates 212 respectively cover the two openings on the main housing 211 and are connected to the main housing 211 to form a closed cavity for placing the electrode assembly 22. The housing 21 is filled with an electrolyte, such as an electrolyte.

[0091] The battery 20 may also include two electrode terminals 214, as an example. Figure 2 As shown, the two electrode terminals 214 can be respectively arranged on the two cover plates 212. The cover plate 212 is generally in the shape of a flat plate, and the two electrode terminals 214 are fixed on the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal and a negative electrode terminal. Each electrode terminal 214 is respectively provided with a connecting member, or also referred to as a current collecting member, which is located between the cover plate 212 and the electrode assembly 22, and is used to electrically connect the electrode assembly 22 and the electrode terminal 214.

[0092] Continue to see Figure 2 As shown, the electrode assembly 22 has a first electrode tab 221 and a second electrode tab ( Figure 2 (not shown), the first pole ear 221 and the second pole ear can be respectively located on opposite sides of the electrode assembly 22. The polarities of the first pole ear 221 and the second pole ear are opposite. For example, when the first pole ear 221 is a positive pole ear, the second pole ear is a negative pole ear. The first pole ear 221 of the electrode assembly 22 is connected to one electrode terminal 214 through a connecting member, and the second pole ear of the electrode assembly 22 is connected to another electrode terminal 214 through another connecting member 3.

[0093] Figure 3 Another structural schematic diagram of a battery 20 provided in one embodiment of the present application is shown.

[0094] like Figure 3 As shown, the battery 20 includes: a housing 21, an electrode assembly 22, and a spacer 24. The electrode assembly 22 is accommodated in the housing 21, and the spacer 24 is disposed between the housing 21 and the electrode assembly 22. The spacer 24 includes a first spacer plate 241 and a second spacer plate 242. The first spacer plate 241 is disposed toward the electrode assembly 22, one end of the second spacer plate 242 is connected to the first surface of the first spacer plate 241, and the other end of the second spacer plate 242 extends toward the direction of the first surface.

[0095] Specifically, in the embodiment of the present application, the relevant technical solutions of the housing 21 and the electrode assembly 22 can be referred to above. Figure 2 Related description of the illustrated embodiment. In some specific implementations, in order to improve the strength of the battery 20 and thus improve the stability of the battery 20, the material of the housing 21 includes but is not limited to metal material.

[0096] The spacer 24 is disposed inside the housing 21 and between the wall of the housing 21 and the electrode assembly 22. Optionally, the spacer 24 may abut between the electrode assembly 22 and the housing 21 to achieve installation of the spacer 24 inside the housing 21. Alternatively, in some alternative embodiments, the spacer 24 may also be disposed inside the housing 21 by other installation means.

[0097] Specifically, the spacer 24 includes a first spacer 241, which is disposed toward the electrode assembly 22. Optionally, in some examples, the first spacer 241 may be attached to the electrode assembly 22. The shape and size of the first spacer 241 may be designed accordingly according to the electrode assembly 22. For example, in the case where one of the surfaces of the first spacer 241 is disposed toward the target surface in the electrode assembly 22, the shape of one surface of the first spacer 241 may be the same as the contour shape of the target surface of the electrode assembly 22, and the area of ​​one surface of the first spacer 241 may be comparable to the area of ​​the target surface of the electrode assembly 22, for example, may be slightly larger than the area of ​​the target surface of the electrode assembly 22.

[0098] Optionally, the first partition plate 241 may be a flat plate structure or a curved plate structure. When the first partition plate 241 is a curved plate structure, as an example but not a limitation, the first partition plate 241 may be a corrugated plate, a curved plate, etc.

[0099] Based on the first spacer 241, the spacer 24 also includes a second spacer 242, which intersects with the large surface of the first spacer 241. For example, the second spacer 242 can intersect with the side of the first spacer 241 facing away from the electrode assembly 22, or the second spacer 242 can also intersect with the side of the first spacer 241 facing the electrode assembly 22.

[0100] In the embodiment of the present application, the second spacer 242 intersects with the first surface of the first spacer 241, and the first surface can be the side of the first spacer 241 facing away from the electrode assembly 22 or the side facing the electrode assembly 22. Specifically, one end of the second spacer 242 is connected to the first surface of the first spacer 241, and the other end of the second spacer 242 extends in the direction of the first surface of the first spacer 241. The two opposite large surfaces of the second spacer 242 have a preset angle with the first surface of the first spacer 241, and the second spacer 242 and the first spacer 241 are not arranged parallel to each other.

[0101] Optionally, when one end of the second spacer 242 is connected to a side of the first spacer 241 facing away from the electrode assembly 22, the other end of the second spacer 242 may abut against the shell 21 of the battery 20. The second spacer 242 may provide a buffer space between the electrode assembly 22 and the shell 21, and provide a certain support force for the electrode assembly 22.

[0102] Optionally, the shape of the second spacer 242 can be designed according to actual needs. As an example, the second spacer 242 can be a rectangular plate, which has high stability and can be stably abutted between the first spacer 241 and the shell 21 or between the first spacer 241 and the electrode assembly 22. In other examples, the second spacer 242 can also be a regular or irregular shape such as a triangle, an ellipse, a diamond, etc. This embodiment of the application does not specifically limit this.

[0103] Optionally, similar to the first partition plate 241, the second partition plate 242 may also be a flat plate structure or a curved plate structure. When the second partition plate 242 is a curved plate structure, as an example but not a limitation, the second partition plate 242 may be a corrugated plate, a curved plate, etc.

[0104] Optionally, the first partition plate 241 and / or the second partition plate 242 may be a plate-like structure of equal thickness or a plate-like structure of unequal thickness.

[0105] Through the technical solution of the embodiment of the present application, a spacer 24 is arranged between the shell 21 of the battery 20 and the electrode assembly 22. The first spacer 241 and the second spacer 242 in the spacer 24 are interconnected and intersected. On the one hand, the two can reduce the possibility of direct hard contact between the shell 21 and the electrode assembly 22. On the other hand, they can also provide support and buffering between the shell 21 and the electrode assembly 22, thereby reducing the impact of external force on the internal electrode assembly 22 when acting on the shell 21 of the battery, thereby improving the reliability of the battery 20.

[0106] In some related technologies, the spacer provided between the housing 21 and the electrode assembly 22 is only a flat or wavy plate-like member. In this case, the flat spacer cannot play a buffering role between the housing 21 and the electrode assembly 22. When an external force acts on the housing 21, the external force may still act on the electrode assembly 22 through the flat spacer, causing a certain impact on the electrode assembly 22. In addition, the wavy spacer has poor supporting force and is easily flattened by the electrode assembly 22, thereby losing its buffering effect. Moreover, the wavy spacer will occupy more space inside the battery 20, resulting in a reduction in the capacity of the battery 20.

[0107] Therefore, the spacer 24 including the first spacer 241 and the second spacer 242 provided in the embodiment of the present application is superior to the above-mentioned planar or wavy spacers, and the spacer 24 can provide a relatively stable and reliable support and buffering effect between the housing 21 and the electrode assembly 22, thereby reliably improving the overall performance of the battery 20. In addition, the first spacer 241 in the spacer 24 can be attached to the electrode assembly 22, and the spacer 24 and the electrode assembly 22 will not cause waste of space inside the battery 20, which is conducive to improving the capacity of the battery 20.

[0108] In some embodiments, Figure 3 As shown, the second spacer 242 is disposed on a side of the first spacer 241 away from the electrode assembly 22. In other words, the first surface of the first spacer 241 is a side of the first spacer 241 away from the electrode assembly 22.

[0109] Specifically, in this embodiment, on the one hand, the first spacer 241 can be conveniently attached to the electrode assembly 22 to provide a more comprehensive support for the electrode assembly 22, and on the other hand, the second spacer 242 is convenient to provide a buffer space between the first spacer 241 and the housing 21 of the battery 20, thereby being able to effectively buffer external stress. In this embodiment, the spacer 24 can provide better support and buffering functions for the electrode assembly 22, thereby greatly improving the reliability of the battery 20.

[0110] Figure 4 A schematic structural diagram of a spacer 24 provided in an embodiment of the present application is shown.

[0111] Alternatively, if Figure 4 As shown, the spacer 24 may include a plurality of second spacer plates 242 , and the plurality of second spacer plates 242 may be arranged and distributed on the first spacer plates 241 .

[0112] Specifically, when the battery 20 has a larger size, a single second spacer 242 may not be able to provide more comprehensive and stable support and buffering between the electrode assembly 22 and the shell 21. In view of this, the spacer 24 may include a plurality of second spacers 242, which may be arranged and distributed on the first spacer 241 in any direction.

[0113] As an example, the first partition plate 241 may be a rectangular partition plate, and the plurality of second partition plates 242 may be arranged and distributed on the first partition plate 241 along the length direction of the first partition plate 241. Alternatively, the plurality of second partition plates 242 may also be arranged and distributed on the first partition plate 241 along the width direction of the first partition plate 241. Alternatively, the plurality of second partition plates 242 may also be arranged and distributed along other directions of the first partition plate 241.

[0114] Through the technical solution of this embodiment, the plurality of second spacers 242 can provide a more comprehensive and stable support and buffering effect between the shell 21 of the battery 20 and the electrode assembly 22, thereby further improving the reliability of the battery 20.

[0115] Optionally, continue to see Figure 4 As shown, a plurality of second spacers 242 may be arranged at equal intervals on the first spacer 241 .

[0116] Specifically, in this embodiment, the plurality of second spacers 242 may be arranged and distributed on the first spacer 241 along the first target direction. The first target direction may be any direction parallel to the first spacer 241. The second spacer 242 forms a connection area in the first spacer 241, and the distance between two adjacent second spacers 242 in the plurality of second spacers 242 may be the minimum distance between two connection areas formed by the two second spacers 242 in the first spacer 241 in the first target direction.

[0117] As an example, Figure 4 As shown, when the second spacer 242 is a rectangular spacer, the connection area formed between the second spacer 242 and the first spacer 241 is a straight strip area, and the distance between two adjacent second spacers 242 can be the minimum distance between the two straight strip areas formed by the two second spacers 242 in the first spacer 241 in the first target direction.

[0118] In this embodiment, the distance between any two adjacent second spacers 242 among the multiple second spacers 242 can be a fixed value. The multiple second spacers 242 can provide relatively uniform support and buffering between the shell 21 of the battery 20 and the electrode assembly 22, and reduce the possibility of stress concentration in a local area of ​​the electrode assembly 22, thereby further improving the reliability of the battery 20.

[0119] In some alternative embodiments, the distance between any two adjacent second spacers 242 in the plurality of second spacers 242 may also be a variable value, that is, the plurality of second spacers 242 may be arranged at non-equidistant intervals on the first spacer 241. This embodiment may be applicable to some batteries 20 with relevant requirements, for example, a local area in the battery 20 needs to have strong protection, and the arrangement density of the second spacers 242 corresponding to the local area may be greater than the arrangement density of the second spacers 242 corresponding to other areas, that is, the distance between the two adjacent second spacers 242 corresponding to the local area may be smaller than the distance between the two adjacent second spacers 242 corresponding to other areas.

[0120] Optionally, continue to see Figure 4As shown, a plurality of second spacer plates 242 may be disposed parallel to each other.

[0121] In this embodiment, the plurality of second partition plates 242 may be disposed parallel to each other on the first partition plate 241 along the first target direction. Optionally, the plurality of second partition plates 242 may be arranged at equal intervals or at non-equal intervals.

[0122] Through the technical solution of this embodiment, the arrangement of the plurality of second spacers 242 on the first spacer 241 is relatively regular, and the overall shape of the spacer 24 is also relatively regular, so it is easy to be installed in the battery 20 without causing additional waste of space in the battery 20. Furthermore, the plurality of second spacers 242 are parallel to each other, and the plurality of second spacers 242 can provide relatively uniform support and buffering for the electrode assembly 22 in the battery 20, which is conducive to further improving the reliability of the battery 20.

[0123] Continue to see Figure 4 As shown, in some embodiments, the distance P between two adjacent second spacers 242 in the plurality of second spacers 242 may satisfy 0.5 mm ≤ P ≤ 50 mm. As an example, P may be 0.8 mm, 1 mm, 3 mm, 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, etc. between 0.5 mm and 50 mm.

[0124] Specifically, in this embodiment, as described above, a plurality of second spacers 242 may be arranged and distributed on the first spacer 241 along the first target direction, and the distance P between two adjacent second spacers 242 among the plurality of second spacers 242 may be the minimum distance between two connection areas formed by the two second spacers 242 in the first spacer 241 in the first target direction.

[0125] As an example, Figure 4 The multiple second spacers 242 shown in the figure are parallel to each other, and the distance P between two adjacent second spacers 242 among the multiple second spacers 242 can be the distance between two parallel straight strip areas formed by the two second spacers 242 in the first spacer 241.

[0126] Through the technical solution of this embodiment, the distance P between two adjacent second spacers 242 among the plurality of second spacers 242 is designed to be within a suitable threshold range, so that the support effect and buffering effect of the spacer 24 can be comprehensively improved. Specifically, the distance P between two adjacent second spacers 242 is designed to be greater than or equal to 0.5 mm, so that there is a certain deformation space between the two adjacent second spacers 242, which is convenient for providing a buffering function for the electrode assembly 22. In addition, the distance P between two adjacent second spacers 242 is designed to be less than or equal to 50 mm, so that the distance between the two adjacent second spacers 242 can be relatively compact, which is convenient for providing a good support effect for the electrode assembly 22.

[0127] Figure 5 A schematic side view of the spacer 24 provided in the embodiment of the present application is shown.

[0128] like Figure 4 and Figure 5 As shown, in some embodiments, the angle α between one of the surfaces of the second spacer plate 242 and the first surface of the first spacer plate 241 satisfies 120°≤α≤170°.

[0129] As an example, in Figure 4 and Figure 5 In the illustrated embodiment, the angle α between the first surface of the second partition plate 242 and the first surface of the first partition plate 241 is an obtuse angle, and the angle β between the second surface of the second partition plate 242 and the first surface of the first partition plate 241 is an acute angle. The first surface and the second surface of the second partition plate 242 are two opposite large surfaces of the second partition plate 242.

[0130] Optionally, in some embodiments, Figure 5 As shown, when the second partition plate 242 is a plate-like member of equal thickness, that is, when the first surface and the second surface of the second partition plate 242 are parallel to each other, the sum of the angle α and the angle β can be 180 degrees.

[0131] Alternatively, in other embodiments, when the second spacer 242 is a plate-like member of unequal thickness, that is, when the first surface and the second surface of the second spacer 242 are not parallel to each other, the sum of the angle α and the angle β may not be equal to 180.

[0132] Through the technical solution of the embodiment of the present application, the two surfaces of the second spacer 242 are inclined to the same side relative to the first spacer 241. The second spacer 242 can play a better buffering role while playing a certain supporting role, thereby effectively buffering the external stress of the battery 20.

[0133] Optionally, the angle α may satisfy 120°≤α<180°. Further, 120°≤α≤170°, and further, 135°≤α≤150°. As an example, α may be 120°, 130°, 135°, 140°, 150°, 160°, etc. between 120° and 180°.

[0134] Optionally, when the spacer 24 includes a plurality of second spacers 242, the angle α between any second spacer 242 of the plurality of second spacers 242 and the first spacer 241 may satisfy 120°≤α<180°, and further, the angle α may satisfy 135°≤α≤150°.

[0135] Through the technical solution of this embodiment, the angle α between the second spacer 242 and the first spacer 241 in the spacer 24 is designed to be within a suitable threshold range, which can further comprehensively improve the buffering effect of the spacer 24 and reduce the space required for the spacer 24 to be occupied in the battery 20. Specifically, the angle α between the second spacer 242 and the first spacer 241 is designed to be less than or equal to 170°, which is conducive to improving the buffer space between the spacer 24 and the shell 21 and the electrode assembly 22, and improving the buffering effect of the spacer 24. In addition, the angle α between the second spacer 242 and the first spacer 241 is designed to be greater than or equal to 120°, which is conducive to increasing the abutment area between the second spacer 242 and the first spacer 241 and the shell 21 when the battery 20 is subjected to stress, improving the structural stability of the second spacer 242, and reducing the space occupied by the second spacer 242 in the battery 20.

[0136] When the angle is 135°≤α≤150°, the overall performance of the spacer 24 is better, and the buffering effect of the spacer 24 can be improved to a greater extent and the space occupied by the spacer 24 in the battery 20 can be reduced.

[0137] It should be noted that, in some embodiments, the surfaces of the first spacer 241 and the second spacer 242 may be curved surfaces. In this case, the angle between the surface of the first spacer 241 and the surface of the second spacer 242 may be the angle between the cross-sections of the two surfaces at the connection point.

[0138] Continue to see Figure 4 and Figure 5 As shown, optionally, the spacer 24 is arranged in the first direction of the electrode assembly 22, and the dimension H of the spacer 24 in the first direction satisfies 1mm≤H≤L / 10, where L is the dimension of the battery 20 in the first direction. As an example, H can be between 1mm and L / 10 and can be 2mm, 5mm, 10mm, L / 15, L / 20, etc.

[0139] Specifically, in this embodiment, the size design of the spacer 24 will affect the performance parameters such as the capacity and energy density of the battery 20. Therefore, the size of the spacer 24 can be designed according to the size of the battery 20, that is, when the spacer 24 is arranged in the first direction of the electrode assembly 22, the size H of the spacer 24 in the first direction can be designed to be less than or equal to one tenth of the size of the battery 20 in the first direction.

[0140] Optionally, the first direction may be any direction of the electrode assembly 22. Figures 3 to 5 As shown, the spacer 24 may be disposed in the height direction of the electrode assembly 22 , L is the dimension of the battery 20 in the height direction, and the dimension of the spacer 24 in the height direction H≤L / 10.

[0141] In addition, the dimension H of the spacer 24 in the first direction needs to be greater than or equal to a certain threshold, that is, greater than 1 mm, so that the spacer 24 can provide a relatively certain buffer space in the first direction, thereby playing a more reliable buffering function.

[0142] Optionally, in some designs, the dimension H of the spacer 24 in the first direction may be a variable value. For example, when the first spacer plate 241 in the spacer 24 is a curved plate-like structure, the dimension H of the spacer 24 in the first direction may be a variable value. In this embodiment, the dimension H of the spacer 24 in the first direction may satisfy 1 mm ≤ H ≤ L / 10.

[0143] Through the technical solution of this embodiment, the height H of the second spacer 242 relative to the first spacer 241 is designed to be within a suitable threshold range, which can further comprehensively improve the buffering effect of the spacer 24 and reduce the space required for the spacer 24 to occupy in the battery 20. Specifically, the height H of the second spacer 242 relative to the first spacer 241 is designed to be less than or equal to L / 10, which can reduce the space required for the second spacer 242 to occupy in the battery 20. In addition, the height H of the second spacer 242 relative to the first spacer 241 is designed to be greater than or equal to 1 mm, so that the second spacer 242 can provide a suitable buffer space between the housing 21 and the electrode assembly 22 to improve the buffering effect of the spacer 24.

[0144] Optionally, in the above-mentioned application embodiment, at least one of the first spacer plate 241 and the second spacer plate 242 includes an insulating plate.

[0145] Specifically, when the housing 21 is made of metal, if the pole piece in the electrode assembly 22 is in direct contact with the metal housing or in contact with the metal housing through the electrolyte, the strength of the metal housing may be reduced due to corrosion. In view of this, a first spacer 241 and / or a second spacer 242 including an insulating plate is provided between the housing 21 of the battery 20 and the electrode assembly 22, which can reduce the metal ion transmission between the electrode assembly 22 and the metal housing 21, thereby reducing the possibility of the electrode assembly 22 causing corrosion to the metal housing 21, and further improving the reliability and service life of the battery 20.

[0146] Optionally, the first spacer 241 and the second spacer 242 may be insulating plates made of the same material, for example, the material of the insulating plate includes but is not limited to polycarbonate (PC), polyethylene (PE) or polyvinyl chloride (PVC), etc. Alternatively, in some alternative embodiments, the first spacer 241 and the second spacer 242 may also be made of different materials.

[0147] Optionally, in the above application embodiment, the material of at least one of the first spacer 241 and the second spacer 242 includes an elastic material. For example, the above PC, PE, PVC, etc. can have a certain elasticity while having insulation properties. The elastic first spacer 241 and / or the second spacer 242 can provide a good elastic buffering effect inside the battery 20.

[0148] In some embodiments, the first partition plate 241 and the second partition plate 242 may be an integrally formed structure. Alternatively, the first partition plate 241 and the second partition plate 242 may also be separate structures.

[0149] When the first spacer 241 and the second spacer 242 are separate structures, the first spacer 241 and the second spacer 242 can be connected to each other by a connection process in the related art. For example, the first spacer 241 and the second spacer 242 can be connected to each other by an adhesive process, a melting process, or a mechanical connector.

[0150] Optionally, the design of the first spacer 241 is different from the design of the second spacer 242 to meet the needs of different batteries 20. For example, the stiffness of the first spacer 241 is different from the stiffness of the second spacer 242, and / or the toughness of the first spacer 241 is different from the toughness of the second spacer 242.

[0151] The above stiffness can be used to characterize the ability of the structural member to resist elastic deformation. The smaller the stiffness of the structural member, the easier it is to elastically deform. On the contrary, the greater the stiffness of the structural member, the less likely it is to elastically deform. The stiffness of the first spacer 241 and the second spacer 242 can be measured by the stiffness measurement method in the relevant technology. As an example, a professional stiffness testing device can be used to place the tested object (i.e., the first spacer 241 and the second spacer 242) between two supporting points using a three-point bending method, a four-point bending method, etc., and apply a force between the two supporting points to measure the bending deformation of the object, thereby measuring the stiffness of the object.

[0152] The toughness can be used to characterize the ability of a structural member to resist fracture. The stronger the toughness of a structural member, the less likely it is to fracture. Conversely, the weaker the toughness of a structural member, the easier it is to fracture. The toughness of the first spacer 241 and the second spacer 242 can be measured using a toughness measurement method in the relevant art. As an example, a professional toughness testing device can be used to measure the work consumed by breaking a test object of a certain shape (i.e., the first spacer 241 and the second spacer 242) by an impact test, thereby measuring the toughness of the object.

[0153] Specifically, in some examples, the rigidity of the first spacer 241 may be less than that of the second spacer 242, and the toughness of the first spacer 241 may be greater than that of the second spacer 242, so that the first spacer 241 is relatively soft, and the first spacer 241 can be attached to the electrode assembly 22, and shrinks along with the electrode assembly 22, with less impact on the electrode assembly 22, and the first spacer 241 has relatively strong toughness, so it is not easy to break, which can improve the reliability and service life of the first spacer 241. In addition, the second spacer 242 is relatively hard, so the second spacer 242 can play a good supporting role for the first spacer 241 and the electrode assembly 22, and the overall structure is more stable.

[0154] Alternatively, in other examples, the rigidity of the first spacer 241 may be greater than the rigidity of the second spacer 242, and the toughness of the first spacer 241 may be less than the toughness of the second spacer 242. In this case, the first spacer 241 is relatively hard and can provide good support for the electrode assembly 22. The second spacer 242 is relatively soft and has strong toughness, which is conducive to improving the buffering effect of the second spacer 242 and providing a larger shrinkage space for the electrode assembly 22 inside the housing 21 of the battery 20.

[0155] Through the technical solution of this embodiment, the stiffness of the first spacer 241 is different from the stiffness of the second spacer 242, and / or the toughness of the first spacer 241 is different from the toughness of the second spacer 242, so that the first spacer 241 and the second spacer 242 can have different characteristics to adapt to the needs of different batteries 20, thereby expanding the application scenarios of the spacer 24 in the battery 20.

[0156] Figure 6 A schematic structural diagram of another battery 20 provided in one embodiment of the present application is shown. Figure 7 Shows Figure 6 A schematic structural diagram of a spacer 24 in a battery 20 is shown.

[0157] like Figure 6 and Figure 7 As shown, in the embodiment of the present application, the spacer 24 also includes: a third spacer 243, one end of which is connected to the second surface of the first spacer 241 opposite to the first surface, and the other end of the third spacer 243 extends in the direction of the second surface of the first spacer 241.

[0158] In the embodiment of the present application, the spacer 24 includes: a first spacer 241, a second spacer 242 and a third spacer 243. The first spacer 241 is disposed toward the electrode assembly 22 of the battery 20, and the second spacer 242 and the third spacer 243 are disposed on both sides of the first spacer 241, and the second spacer 242 and the third spacer 243 are intersected with the first spacer 241.

[0159] Specifically, the third spacer 243 and the first spacer 241 have a preset angle, and the third spacer 243 and the first spacer 241 are not arranged parallel to each other. As an example, when the second spacer 242 is connected to the side of the first spacer 241 facing away from the electrode assembly 22, and the third spacer 243 is connected to the side of the first spacer 241 facing the electrode assembly 22, one end of the third spacer 243 is connected to the first spacer 241, and the other end can abut against the electrode assembly 22. The third spacer 243 can provide a larger buffer space between the electrode assembly 22 and the shell 21, and provide a certain support force for the electrode assembly 22.

[0160] Optionally, the shape of the third partition plate 243 can be designed according to actual needs. In some embodiments, the third partition plate 243 can be the same as the second partition plate 242 in the above embodiment. As an example, the third partition plate 243 can be a rectangular plate, which has high stability. In other examples, the third partition plate 243 can also be a regular or irregular shape such as a triangle or an ellipse. The embodiments of the present application do not specifically limit this.

[0161] Through the technical solution of the embodiment of the present application, the spacer 24 may include: a first spacer 241, a second spacer 242 and a third spacer 243 at the same time. The spacer 24 may be similar to a "fishbone" shape. The "fishbone" shaped spacer 24 may have better supporting and buffering effects, which is beneficial to further improve the overall performance of the battery 20.

[0162] In some embodiments, Figure 6 and Figure 7 As shown, the spacer 24 may include: a plurality of third spacer plates 243 , and the plurality of third spacer plates 243 may be arranged and distributed on the first spacer plate 241 .

[0163] Specifically, when the battery 20 has a larger size, a single third spacer 243 may not be able to provide more comprehensive and stable support and buffering between the electrode assembly 22 and the shell 21. In view of this, the spacer 24 may include a plurality of third spacers 243, which may be arranged and distributed on the first spacer 241 in any direction.

[0164] Optionally, the arrangement direction of the plurality of third spacers 243 on the first spacer 241 may be the same as the arrangement direction of the plurality of second spacers 242 on the first spacer 241. As an example, the first spacer 241 may be a rectangular spacer, and the plurality of second spacers 242 and the plurality of third spacers 243 may be arranged and distributed on both surfaces of the first spacer 241 along the length direction of the first spacer 241.

[0165] Alternatively, in some alternative embodiments, the arrangement direction of the plurality of third spacers 243 on the first spacer 241 may also be different from the arrangement direction of the plurality of second spacers 242 on the first spacer 241. As an example, the first spacer 241 may be a rectangular spacer, the plurality of second spacers 242 may be arranged and distributed on one surface of the first spacer 241 along the length direction of the first spacer 241, and the plurality of third spacers 243 may be arranged and distributed on the other surface of the first spacer 241 along the width direction of the first spacer 241.

[0166] Through the technical solution of this embodiment, the plurality of third spacers 243 can further provide a more comprehensive and stable support and buffering effect between the shell 21 of the battery 20 and the electrode assembly 22, thereby further improving the reliability of the battery 20.

[0167] Optionally, continue to see Figure 6 and Figure 7 As shown, a plurality of third partition plates 243 may be arranged at equal intervals on the first partition plate 241 .

[0168] Specifically, in this embodiment, the plurality of third spacers 243 may be arranged and distributed on the first spacer 241 along the second target direction. The second target direction may be any direction parallel to the first spacer 241. The third spacers 243 form a connection area in the first spacer 241, and the distance between two adjacent third spacers 243 among the plurality of third spacers 243 may be the minimum distance between two connection areas formed by the two third spacers 243 in the first spacer 241 in the second target direction.

[0169] As an example, Figure 7 As shown, when the third spacer 243 is a rectangular spacer, the connection area formed between the third spacer 243 and the first spacer 241 is a straight strip area, and the distance between two adjacent third spacers 243 can be the minimum distance between the two straight strip areas formed by the two third spacers 243 in the first spacer 241 in the second target direction.

[0170] In this embodiment, the distance between any two adjacent third spacers 243 among the multiple third spacers 243 can be a fixed value. The multiple third spacers 243 can provide relatively uniform support and buffering between the shell 21 of the battery 20 and the electrode assembly 22, and reduce the possibility of stress concentration in a local area of ​​the electrode assembly 22, thereby further improving the reliability of the battery 20.

[0171] Optionally, continue to see Figure 6 and Figure 7 As shown, a plurality of third spacer plates 243 may be disposed parallel to each other.

[0172] In this embodiment, a plurality of third partition plates 243 may be disposed parallel to each other on the first partition plate 241 along the second target direction. Optionally, the plurality of third partition plates 243 parallel to each other may be arranged at equal intervals or at non-equal intervals.

[0173] Through the technical solution of this embodiment, the arrangement of the plurality of third spacers 243 on the first spacer 241 is relatively regular, and the overall shape of the spacer 24 is also relatively regular, so it is easy to be installed in the battery 20 without causing additional waste of space in the battery 20. Furthermore, the plurality of third spacers 243 are parallel to each other, and the plurality of third spacers 243 can provide relatively uniform support and buffering for the electrode assembly 22 in the battery 20, which is conducive to further improving the reliability of the battery 20.

[0174] Optionally, in the above application embodiment, the relevant design of the third partition plate 243 can refer to the above Figures 3 to 5The relevant scheme of the second spacer 242 in the illustrated embodiment. In other words, the arrangement of the plurality of third spacers 243 on the first spacer 241 can be the same as the arrangement of the plurality of second spacers 242 on the first spacer 241 in the above embodiment. For example, the distance design between two adjacent third spacers 243 in the plurality of third spacers 243 can be the same as the relevant design of the distance P between two adjacent second spacers 242 in the above embodiment. The angle design between the third spacer 243 and the first spacer 241 can be the same as the relevant design of the angle α between the second spacer 242 and the first spacer 241 in the above embodiment. The height design of the third spacer 243 relative to the first spacer 241 can also be the same as the relevant design of the height of the second spacer 242 relative to the first spacer 241 in the above embodiment.

[0175] Through the technical solution of this embodiment, the second partition plate 242 and the third partition plate 243 arranged on both sides of the first partition plate 241 have the same arrangement, so the force on both sides of the first partition plate 241 is more uniform, which can reduce the stress concentration on a certain side of the first partition plate 241 and improve the overall reliability of the spacer 24.

[0176] In some specific implementations, such as Figure 6 and Figure 7 As shown, the third spacer plate 243 and the second spacer plate 242 may be symmetrically arranged relative to the first spacer plate 241 .

[0177] In this implementation, the shape and size of the third spacer 243 are the same as those of the second spacer 242. In the case where the spacer 24 includes a plurality of third spacers 243 and a plurality of second spacers 242, the arrangement of the plurality of third spacers 243 on one surface of the first spacer 241 is the same as the arrangement of the plurality of second spacers 242 on the other surface of the first spacer 241.

[0178] Through the technical solution of this embodiment, the spacer 24 is an axially symmetrical "fishbone"-shaped component, which can play a relatively symmetrical and uniform supporting and buffering effect between the electrode assembly 22 and the shell 21 of the battery 20, thereby helping to further improve the overall performance of the battery 20.

[0179] Optionally, in the above application embodiment, the third spacer plate 243 may include an insulating plate.

[0180] Through the technical solution of this embodiment, a third spacer 243 including an insulating plate is arranged between the shell 21 of the battery 20 and the electrode assembly 22, which can reduce the metal ion transmission between the electrode assembly 22 and the metal shell 21, thereby reducing the possibility of corrosion of the metal shell 21 by the electrode assembly 22, and further improving the reliability and service life of the battery 20.

[0181] Optionally, in the above application embodiment, the material of the third spacer plate 243 may include elastic material.

[0182] In some embodiments, the first partition plate 241, the second partition plate 242, and the third partition plate 243 may be an integrally formed structure. Alternatively, the first partition plate 241, the second partition plate 242, and the third partition plate 243 may also be separate structures.

[0183] Optionally, the materials of the first partition plate 241, the second partition plate 242 and the third partition plate 243 may be the same. Alternatively, the materials of the first partition plate 241, the second partition plate 242 and the third partition plate 243 may be different.

[0184] In the above embodiments, the battery 20 may include a single spacer 24 , and the single spacer 24 may be disposed corresponding to other walls of the housing 21 except the wall where the electrode terminal 214 is located.

[0185] In some embodiments, Figure 3 and Figure 6 As shown, the spacer 24 may be disposed in the gravity direction of the electrode assembly 22 in the battery 20. In an embodiment, the electrode terminal 214 of the battery 20 may be disposed on the side wall and / or the top wall of the battery 20.

[0186] In this embodiment, when the battery 20 is susceptible to stress from the direction of gravity, the spacer 24 can effectively resist and buffer the stress, thereby reducing the influence of the stress on the electrode assembly 22. As an example, when the battery 20 is disposed on the chassis of a vehicle, the spacer 24 can effectively resist and buffer the stress caused by foreign objects such as flying rocks from under the vehicle on the battery 20, thereby improving the reliability and service life of the battery 20 in the vehicle.

[0187] Figure 8 A schematic structural diagram of another battery 20 provided in one embodiment of the present application is shown.

[0188] like Figure 8 As shown, the battery 20 may include: a plurality of spacers 24, which are respectively disposed in the gravity direction and the anti-gravity direction of the electrode assembly 22.

[0189] As an example, Figure 8Two spacers 24 are shown, and the two spacers 24 may be located in the gravity direction and the anti-gravity direction of the electrode assembly 22 , respectively. That is, the two spacers 24 may be disposed corresponding to the top wall and the bottom wall of the shell 21 , respectively.

[0190] Optionally, the two spacers 24 may be the same two spacers 24, or the designs of the first spacer 241 and the second spacer 242 in the two spacers 24 may be different. For example, the number of the second spacers 242 in the two spacers 24 may be different, and / or the angles between the second spacers 242 and the first spacers 241 in the two spacers 24 may be different. It is understandable that each spacer 24 in the battery 20 may be designed according to actual needs, and the embodiment of the present application does not specifically limit the structural differences between different spacers 24.

[0191] Through the technical solution of this embodiment, a plurality of spacers 24 are provided in the battery 20, and the plurality of spacers 24 can protect the electrode assembly 22 in the battery 20 in multiple directions, thereby further improving the reliability and service life of the battery 20. In addition, when the battery 20 is applied to an electrical device, for example, when the battery 20 is applied to a vehicle, the battery 20 is prone to vibration in the direction of gravity and the direction of anti-gravity, and thus the battery 20 is prone to stress in the direction of gravity and the direction of anti-gravity. Arranging a plurality of spacers 24 in the direction of gravity and the direction of anti-gravity of the electrode assembly 22 in the battery 20, respectively, is conducive to further resisting and buffering the influence of stress in the direction of gravity and the direction of anti-gravity on the electrode assembly 22, and improving the reliability and service life of the battery 20 in the vehicle.

[0192] Optionally, in the above-mentioned application embodiment, the spacer 24 can be respectively arranged in the gravity direction and / or anti-gravity direction of the electrode assembly 22, that is, multiple spacers 24 can be respectively arranged corresponding to the top wall and bottom wall of the shell 21, and the electrode terminals 214 of the battery 20 can be respectively arranged on the two side walls of the shell 21.

[0193] Alternatively, in other alternative embodiments, when the electrode terminal 214 of the battery 20 is located in the gravity direction and / or anti-gravity direction of the electrode assembly 22, that is, the electrode terminal 214 is respectively arranged corresponding to the top wall and / or bottom wall of the shell 21, the spacer 24 can also be arranged corresponding to the side wall of the shell 21, that is, the spacer 24 is arranged on the side of the electrode assembly 22.

[0194] Optionally, in the above application embodiment, the spacer 24 is mainly suitable for a laminated electrode assembly, that is, the electrode assembly 22 in the battery 20 is a laminated electrode assembly, and the first spacer 241 in the spacer 24 is arranged toward the stacking surface of the laminated electrode assembly.

[0195] Specifically, in the stacked electrode assembly, the positive electrode sheet, the isolation membrane and the negative electrode sheet are stacked in sequence along the stacking direction. The stacking surface in the stacked electrode assembly is the surface formed by the sides of the positive electrode sheet, the isolation membrane and the negative electrode sheet, and the stacking surface is parallel to the stacking direction.

[0196] As an example, in the above Figure 2 In the case where the electrode assembly 22 in the battery 20 shown in the figure is a laminated electrode assembly, the stacking surface of the laminated electrode assembly is the other four side surfaces except the two large surfaces in the electrode assembly 22. The one or more spacers 24 provided in the embodiment of the present application can be arranged toward any one or more side surfaces of the electrode assembly 22. In some specific implementations, the two spacers 24 can be arranged toward the upper and lower surfaces of the electrode assembly 22, respectively, and the left and right surfaces of the electrode assembly 22 correspond to the end cap 214 of the battery 20.

[0197] Through the technical solution of the embodiment of the present application, the spacer 24 is applied to the battery 20 including the laminated electrode assembly. The spacer 24 can play a good spacing and buffering role between the stacking surface of the laminated electrode assembly and the shell 21 of the battery 20. No hard contact will occur between the stacking surface and the shell 21. The spacer 24 can reduce the influence of external stress on the stacking surface of the laminated electrode assembly, thereby reducing the possibility of overlap between the positive and negative electrode sheets on the stacking surface due to external force, thereby improving the reliability of the battery 20.

[0198] It should be noted that, as an example, Figure 8 The two spacers 24 shown in FIG. 2 can be used together with the above Figures 3 to 5 The spacers 24 in the illustrated embodiment are identical, that is, each spacer 24 includes a first spacer plate 241 and a second spacer plate 242. In some alternative embodiments, the two spacers 24 may also be the same as those described above. Figure 6 and Figure 7 The spacers 24 in the illustrated embodiment are identical, and each spacer 24 includes a first spacer plate 241 , a second spacer plate 242 , and a third spacer plate 243 .

[0199] Optionally, when the battery 20 includes a laminated electrode assembly, and the spacer 24 includes a plurality of third spacers 243, the arrangement direction of the plurality of third spacers 243 can be parallel to the stacking direction of the positive electrode sheets, the separator and the negative electrode sheets in the laminated electrode assembly. In this embodiment, the third spacer 243 only contacts a small number of electrode sheets in the laminated electrode assembly, and the third spacer 243 has little effect on the electrode assembly. Alternatively, in some alternative embodiments, the arrangement direction of the plurality of third spacers 243 can also be perpendicular to the stacking direction of the positive electrode sheets, the separator and the negative electrode sheets in the laminated electrode assembly. In this embodiment, each third spacer 243 can simultaneously contact all the electrode sheets in the laminated electrode assembly to provide good support for the laminated electrode assembly. Alternatively, in other alternative embodiments, the arrangement direction of the plurality of third spacers 243 can also be any other direction parallel to the stacking surface, which is not limited in the embodiments of the present application.

[0200] The present application also provides a spacer, the structure of which may be the same as the structure of the spacer 24 in the aforementioned embodiments.

[0201] Specifically, the spacer may include: a first spacer plate 241 and a second spacer plate 242 , wherein one end of the second spacer plate 242 is connected to the first surface of the first spacer plate 241 , and the other end of the second spacer plate 242 extends toward the direction of the first surface.

[0202] In some embodiments, the spacer can be applied to the battery 20 as shown in the above spacer 24, and is disposed between the housing 21 and the electrode assembly 22 of the battery 20 to provide buffering and support. In other embodiments, the spacer can also be applied to other structural scenarios, such as battery packs, vehicles, etc., to reduce the impact and influence of external stress on the product structure.

[0203] The specific structure of the spacer provided in the embodiments of the present application can be found in the relevant description of any of the above embodiments, and for the sake of brevity, no further details will be given here.

[0204] The present application also provides an electric device, which may include the battery 20 in the above embodiments, and the battery 20 is used to provide electric energy to the electric device. Optionally, the electric device may be a vehicle 1, a ship or a spacecraft.

[0205] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: Housing (21); An electrode assembly (22) is accommodated in the housing (21); A spacer (24) is arranged between the shell (21) and the electrode assembly (22), and the spacer (24) includes a first spacer plate (241) and a second spacer plate (242), wherein the first spacer plate (241) is arranged toward the electrode assembly (22), one end of the second spacer plate (242) is connected to the first surface of the first spacer plate (241), and the other end of the second spacer plate (242) extends in the direction of the first surface.

2. The battery according to claim 1, characterized in that The first surface is a side of the first spacer (241) that faces away from the electrode assembly (22).

3. The battery according to claim 1 or 2, characterized in that: The spacer (24) comprises: a plurality of the second spacer plates (242), wherein the plurality of the second spacer plates (242) are arranged and distributed on the first spacer plate (241).

4. The battery according to claim 3, characterized in that A plurality of the second partition plates (242) are arranged at equal intervals and distributed on the first partition plate (241).

5. The battery according to claim 3 or 4, characterized in that: A plurality of the second partition plates (242) are arranged parallel to each other.

6. The battery according to any one of claims 3 to 5, characterized in that A distance P between two adjacent second spacer plates (242) among the plurality of second spacer plates (242) satisfies 0.5 mm ≤ P ≤ 50 mm.

7. The battery according to any one of claims 1 to 6, characterized in that An included angle α between one of the surfaces of the second partition plate (242) and the first surface of the first partition plate (241) satisfies 120°≤α≤170°.

8. The battery according to claim 7, characterized in that 135°≤α≤150°。 9. The battery according to any one of claims 1 to 8, characterized in that The spacer (24) is arranged in a first direction of the electrode assembly (22), and a dimension H of the spacer (24) in the first direction satisfies 1 mm ≤ H ≤ L / 10, wherein L is a dimension of the battery in the first direction.

10. The battery according to any one of claims 1 to 9, characterized in that At least one of the first spacer plate (241) and the second spacer plate (242) includes an insulating plate.

11. The battery according to any one of claims 1 to 10, characterized in that The material of at least one of the first spacer plate (241) and the second spacer plate (242) includes an elastic material.

12. The battery according to any one of claims 1 to 11, characterized in that The rigidity of the first spacer plate (241) is smaller than the rigidity of the second spacer plate (242), and the toughness of the first spacer plate (241) is larger than the toughness of the second spacer plate (242).

13. The battery according to any one of claims 1 to 11, characterized in that The rigidity of the first spacer plate (241) is greater than the rigidity of the second spacer plate (242), and the toughness of the first spacer plate (241) is less than the toughness of the second spacer plate (242).

14. The battery according to any one of claims 1 to 13, characterized in that The spacer (24) further comprises: a third spacer plate (243), one end of the third spacer plate (243) being connected to a second surface of the first spacer plate (241) opposite to the first surface, and the other end of the third spacer plate (243) extending in a direction toward the second surface.

15. The battery according to claim 14, characterized in that The spacer (24) comprises: a plurality of third spacer plates (243), wherein the plurality of third spacer plates (243) are arranged and distributed on the first spacer plate (241).

16. The battery according to claim 15, characterized in that The arrangement of the plurality of third spacers (243) on the first spacer (241) is the same as the arrangement of the plurality of second spacers (242) on the first spacer (241).

17. The battery according to any one of claims 14 to 16, characterized in that The third partition plate (243) and the second partition plate (242) are symmetrically arranged relative to the first partition plate (241).

18. The battery according to any one of claims 14 to 17, characterized in that The third spacer plate (243) includes an insulating plate.

19. The battery according to any one of claims 1 to 18, characterized in that The spacer (24) is arranged in the gravity direction of the electrode assembly (22).

20. The battery according to any one of claims 1 to 19, characterized in that The battery comprises: a plurality of the spacers (24), wherein the plurality of the spacers (24) are respectively arranged in the gravity direction and the anti-gravity direction of the electrode assembly (22).

21. The battery according to any one of claims 1 to 20, characterized in that The electrode assembly (22) is a laminated electrode assembly, and the first partition plate (241) in the partition (24) is arranged toward the stacking surface of the laminated electrode assembly.

22. A spacer, characterized in that: include: A first partition plate (241) and a second partition plate (242), wherein one end of the second partition plate (242) is connected to the first surface of the first partition plate (241), and the other end of the second partition plate (242) extends in the direction of the first surface.

23. The spacer according to claim 22, characterized in that The spacer comprises: a plurality of the second spacer plates (242), and the plurality of the second spacer plates (242) are arranged and distributed on the first spacer plate (241).

24. The spacer according to claim 23, characterized in that A plurality of the second partition plates (242) are arranged at equal intervals and distributed on the first partition plate (241).

25. The spacer according to claim 23 or 24, characterized in that A plurality of the second partition plates (242) are arranged parallel to each other.

26. The spacer according to any one of claims 23 to 25, characterized in that A distance P between two adjacent second spacer plates (242) among the plurality of second spacer plates (242) satisfies 0.5 mm ≤ P ≤ 50 mm.

27. The spacer according to any one of claims 22 to 26, characterized in that An included angle α between one of the surfaces of the second partition plate (242) and the first surface of the first partition plate (241) satisfies 120°≤α≤170°.

28. The spacer according to any one of claims 22 to 27, characterized in that At least one of the first spacer plate (241) and the second spacer plate (242) includes an insulating plate.

29. The spacer according to any one of claims 22 to 28, characterized in that The material of at least one of the first spacer plate (241) and the second spacer plate (242) includes an elastic material.

30. The spacer according to any one of claims 22 to 29, characterized in that The spacer also includes: a third spacer plate (243), one end of the third spacer plate (243) is connected to a second surface of the first spacer plate (241) opposite to the first surface, and the other end of the third spacer plate (243) extends in a direction toward the second surface.

31. The spacer according to claim 30, characterized in that The spacer comprises: a plurality of the third spacer plates (243), and the plurality of the third spacer plates (243) are arranged and distributed on the first spacer plate (241).

32. The spacer according to claim 31, characterized in that The arrangement of the plurality of third spacers (243) on the first spacer (241) is the same as the arrangement of the plurality of second spacers (242) on the first spacer (241).

33. The spacer according to any one of claims 30 to 32, characterized in that The third partition plate (243) and the second partition plate (242) are symmetrically arranged relative to the first partition plate (241).

34. An electrical device, characterized in that: include: The battery according to any one of claims 1 to 21, wherein the battery is used to provide electrical energy to the electrical device.

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