Battery and electric apparatus

Abstract

A battery (10) and an electric apparatus. Specifically, the battery (10) comprises: a first battery cell (31) and a second battery cell (32) which are adjacent to each other, and a functional component (33), wherein the functional component (33) is disposed in a gap formed by a first surface (311) of the first battery cell (31) and a second surface (321) of the second battery cell (32); filling components (34) and / or a first isolating component (351), the filling components (34) filling edges of the gap, and the first isolating component (351) being tightly attached to an edge of a third surface (312) of the first battery cell (31) and a fourth surface (322) of the second battery cell (32), and covering the gap formed by the first surface (311) and the second surface (321). The third surface (312) intersects with the first surface (311), and the fourth surface (322) intersects with the second surface (321). The solution of the embodiments can lower the probability of insulation problems, thermal runaway, or other such issues occurring in battery cells (31), thus improving overall battery (10) performance.

Description

Battery and power device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202420334454.1, filed on February 23, 2024, entitled “A Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and more specifically, to a battery and an electrical device. Background Art

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become a crucial component of the industry's sustainable development. Battery technology, in turn, is a crucial factor in the development of electric vehicles.

[0005] However, during the battery's charge and discharge process, the internal temperature rises, potentially leading to problems such as thermal runaway, which can affect battery performance and the user experience. Therefore, reducing the probability of thermal runaway is a pressing issue in battery technology.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a battery and an electrical device that can reduce the probability of insulation problems, thermal runaway problems, etc. in battery cells, thereby improving the overall performance of the battery.

[0008] In a first aspect, a battery is provided, comprising: a first battery cell and a second adjacent battery cell, and a functional component, wherein the functional component is arranged in a gap formed by the first surface of the first battery cell and the second surface of the second battery cell; a filling component and / or a first isolation component, wherein the filling component fills the edge of the gap, the first isolation component is tightly attached to the edge of the third surface of the first battery cell and the fourth surface of the second battery cell, and covers the gap formed by the first surface and the second surface, the third surface intersects with the first surface, and the fourth surface intersects with the second surface.

[0009] In the embodiments of the present application, by filling the gaps between adjacent battery cells with filling components and / or covering the gaps between adjacent battery cells with isolation components, the probability of particles falling into the gaps between battery cells can be reduced, and the probability of insulation problems, thermal runaway problems, etc. in the battery cells can be reduced, thereby improving the overall performance of the battery.

[0010] In some embodiments, the filling component fills other areas of the gap except the area occupied by the functional component.

[0011] In the embodiment of the present application, by setting the filling components in other areas except the area occupied by the functional components, the gap between two adjacent battery cells is completely filled, thereby improving the uniformity of the battery cell expansion and further improving the cycle performance of the battery. At the same time, it can also reduce the probability of discharged particles falling into the gap between two adjacent battery cells after one of the battery cells has thermal runaway, reduce the probability of insulation problems, thermal runaway problems, etc. in the battery cells, and improve the overall performance of the battery.

[0012] In some embodiments, the third surface of the first battery cell is provided with a pressure relief mechanism, and / or the fourth surface of the second battery cell is provided with a pressure relief mechanism; wherein the filling component and / or the first isolation component is provided close to the pressure relief mechanism relative to the functional component.

[0013] In an embodiment of the present application, the third surface of the first battery cell is provided with a pressure relief mechanism, and / or the fourth surface of the second battery cell is provided with a pressure relief mechanism, and the filling component and / or the first isolation component are arranged close to the pressure relief mechanism relative to the functional component. After thermal runaway occurs in the battery cell, the probability of particles discharged through the pressure relief mechanism falling into the gap between two adjacent battery cells can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. occurring in the battery cell can be reduced, thereby improving the overall performance of the battery.

[0014] In some embodiments, the filling member and / or the first isolation member has a melting point greater than or equal to 100° C. Thus, in the embodiments of the present application, by setting the melting point of the filling member and / or the first isolation member to be greater than or equal to 100° C., in the event of thermal runaway of a battery cell, the probability of insulation problems and thermal runaway problems caused by discharged particles falling between two adjacent battery cells can be effectively reduced, thereby improving the overall performance of the battery.

[0015] In some embodiments, the filling component is arranged to protrude from the third surface of the first battery cell and / or the fourth surface of the second battery cell. Thus, in the embodiments of the present application, by arranging the filling component to protrude from the third surface of the first battery cell and / or the fourth surface of the second battery cell, the probability of particles discharged from the battery cell in the event of thermal runaway falling into the gap between two adjacent battery cells can be further reduced, and the probability of insulation problems, thermal runaway problems, etc. in the battery cell can be reduced, thereby improving the overall performance of the battery.

[0016] In some embodiments, the third surface of the first battery cell is provided with a first electrode terminal, and / or the fourth surface of the second battery cell is provided with a second electrode terminal; wherein the filling component is not provided higher than the first electrode terminal and / or the second electrode terminal.

[0017] In an embodiment of the present application, a first electrode terminal is provided on the third surface of the first battery cell, and / or a second electrode terminal is provided on the fourth surface of the second battery cell, and the filling component is not provided higher than the first electrode terminal and / or the second electrode terminal, so as to reduce the impact of the filling component on the first electrode terminal and / or the second electrode terminal, thereby facilitating the processing and manufacturing of the battery. At the same time, it can reduce the probability of high-temperature particles discharged from the battery cell in the event of thermal runaway falling into the gap between two adjacent battery cells, and reduce the probability of insulation problems, thermal runaway problems, etc. in the battery cell, thereby improving the overall performance of the battery.

[0018] In some embodiments, the filling component is flush with the first electrode terminal and / or the second electrode terminal. Thus, in the embodiments of the present application, by flushing the filling component with the first electrode terminal and / or the second electrode terminal, the processing and manufacturing of the battery are facilitated and the production cost is reduced.

[0019] In some embodiments, the functional component is disposed in the middle area between the first surface and the second surface; the filling component includes a first filling component and a second filling component, and the first filling component and the second filling component are disposed in at least one of the two edge gaps between the first surface and the second surface.

[0020] In an embodiment of the present application, by arranging the first filling component and the second filling component in at least one of the two edge gaps between the first surface and the second surface, the probability of high-temperature particles discharged from the battery cell in the event of thermal runaway falling into the gap between two adjacent battery cells can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. occurring in the battery cell can be reduced, thereby improving the overall performance of the battery.

[0021] In some embodiments, the first filling component is flush with the third surface and the fourth surface, and / or the second filling component is flush with the fifth surface of the first battery cell and the sixth surface of the second battery cell, the third surface is arranged opposite to the fifth surface, and the fourth surface is arranged opposite to the sixth surface.

[0022] In the embodiment of the present application, by setting the filling component flush with the surface of the battery cell, the probability of discharged particles falling into the gap between two adjacent battery cells after one of the battery cells has thermal runaway can be reduced, the probability of insulation problems, thermal runaway problems, etc. in the battery cells can be reduced, and the overall performance of the battery can be improved. In addition, the manufacturing method is simple and efficient, which facilitates the processing and manufacturing of the battery.

[0023] In some embodiments, the third surface of the first battery cell is provided with a pressure relief mechanism, and / or the fourth surface of the second battery cell is provided with a pressure relief mechanism, one of the first filling component and the second filling component is close to the pressure relief mechanism, and the other is far away from the pressure relief mechanism, and the melting point of the one close to the pressure relief mechanism is higher than the melting point of the other far away from the pressure relief mechanism.

[0024] In an embodiment of the present application, one of the first filling component and the second filling component is close to the pressure relief mechanism, and the other is far away from the pressure relief mechanism. By setting the melting point of the one close to the pressure relief mechanism to be higher than the melting point of the other far away from the pressure relief mechanism, after a thermal runaway occurs in a battery cell, the probability of particles discharged through the pressure relief mechanism falling into the gap between two adjacent battery cells can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. occurring in the battery cell can be reduced, thereby improving the overall performance of the battery and helping to reduce the manufacturing cost of the battery.

[0025] In some embodiments, the battery also includes a second isolation component, which is tightly attached to the edges of the fifth surface of the first battery cell and the sixth surface of the second battery cell and covers the gap between the first surface and the second surface, the fifth surface intersects with the first surface, and the sixth surface intersects with the second surface, wherein the third surface is arranged opposite to the fifth surface, and the fourth surface is arranged opposite to the sixth surface.

[0026] In the embodiment of the present application, by providing a second isolation component, the gaps between adjacent battery cells are further covered, so that particles generated by thermal runaway and the like are less likely to enter the gaps between adjacent battery cells, thereby reducing the probability of insulation problems, thermal runaway problems, etc. occurring in the battery cells, and further improving the overall performance of the battery.

[0027] In some embodiments, the material of the first isolation component and / or the second isolation component is a thermoplastic resin or thermoplastic polyester. Thus, in the embodiments of the present application, by setting the material of the first isolation component and / or the second isolation component to a thermoplastic resin or thermoplastic polyester with strong plasticity, good chemical resistance and mechanical properties, after a battery cell experiences thermal runaway, the probability of particles discharged from the battery falling into the gap between two adjacent battery cells can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. in the battery cell can be reduced, thereby improving the overall performance of the battery.

[0028] In some embodiments, the material of the filling component is one of the following: rubber, silica gel, silicone glue, epoxy glue, and compressible foam.

[0029] In the embodiment of the present application, by setting the material type of the filling component, the applicable material type can be flexibly used in different types of batteries, thereby reducing the probability of insulation problems, thermal runaway problems, etc. in the battery cells and reducing the manufacturing cost of the battery.

[0030] In some embodiments, the first isolation member and / or the second isolation member is a plate-like structure or a T-shaped structure with a protrusion, with at least a portion of the protrusion filling the edge of the gap. Thus, in embodiments of the present application, by configuring the first isolation member and / or the second isolation member as a plate-like structure or a T-shaped structure with a protrusion, with at least a portion of the protrusion filling the edge of the gap, processing and assembly of the battery are facilitated, and manufacturing costs are reduced.

[0031] In a second aspect, an electrical device is provided, comprising the battery as described in the first aspect or any embodiment of the first aspect, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 shows a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0033] FIG2 shows a schematic structural diagram of a battery according to an embodiment of the present application.

[0034] FIG3 shows a schematic structural diagram of a battery cell provided in an embodiment of the present application.

[0035] FIG4 shows a schematic structural diagram of a battery provided in an embodiment of the present application.

[0036] FIG5 shows a schematic structural diagram of another battery provided in an embodiment of the present application.

[0037] FIG6 shows a schematic structural diagram of another battery provided in an embodiment of the present application.

[0038] FIG7 shows a schematic structural diagram of another battery provided in an embodiment of the present application.

[0039] FIG8 shows a schematic structural diagram of another battery provided in an embodiment of the present application.

[0040] FIG9 shows a schematic structural diagram of another battery provided in an embodiment of the present application.

[0041] FIG10 shows a schematic structural diagram of another battery provided in an embodiment of the present application.

[0042] DESCRIPTION OF REFERENCE NUMERALS: 1-vehicle; 11-motor; 12-controller; 10-battery; 100-housing; 110-first housing portion; 20-battery cell; 120-second housing portion; 214-electrode terminal; 214a-positive electrode terminal; 214b-negative electrode terminal; 212-cover plate; 22-electrode assembly; 23-connecting member; 221a-first electrode tab; 222a-second electrode tab; 211-housing; 213-pressure relief mechanism; 215-bottom wall; 310-first electrode terminal; 320-second electrode terminal; 312-third surface; 322-fourth surface; 341-first filling component; 311-first surface; 321-second surface; 31-first battery cell; 32-second battery cell; 33-functional component; 313-fifth surface; 342-second filling component; 323-sixth surface; 34-filling component; 35-isolating component; 351-first isolating component; 352-second isolating component.

[0043] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0044] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, i.e., the present application is not limited to the described embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on this 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 perpendicular, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0046] 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.

[0047] The term "and / or" in this application simply describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" 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-secondary relationship.

[0049] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0050] In this application, a battery refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing reduces the possibility of liquids or other foreign matter affecting the charging or discharging of the battery cells.

[0051] Optionally, the battery cell 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. The battery cell may be cylindrical, flat, rectangular, or in other shapes, etc., which is not limited in the embodiments of the present application. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, which is not limited in the embodiments of the present application.

[0052] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet comprises a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The current collector uncoated with the positive active material layer protrudes from the current collector coated with the positive active material layer, and the current collector uncoated with the positive active material layer serves as the positive electrode tab. For lithium-ion batteries, for example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet comprises a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The current collector uncoated with the negative active material layer protrudes from the current collector coated with the negative active material layer, and the current collector uncoated with the negative active material layer serves as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be carbon or silicon, among others. To allow high current to pass without fusing, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. The separator can be made of polypropylene (PP) or polyethylene (PE). In addition, the electrode assembly can be a wound structure or a laminated structure, but the embodiments of the present application are not limited to this.

[0053] The development of battery technology must take into account multiple design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, the safety, stability and other performance of the battery must also be considered.

[0054] When a battery includes multiple battery cells, there is usually a certain gap between adjacent battery cells. When a battery cell experiences thermal runaway, it will discharge high-temperature gas, liquid, particles and other emissions. These emissions may affect adjacent battery cells. For example, discharged particles may fall into the gap between two battery cells, causing insulation problems in the adjacent battery cells, and further triggering thermal runaway and other problems in the adjacent battery cells.

[0055] Specifically, functional components, such as cooling plates, thermal insulation pads, buffer pads, etc., can be arranged between adjacent battery cells. However, due to the height difference between the functional components and the battery cells, and they are usually arranged in the middle area between the battery cells, the height difference will cause gaps between adjacent battery cells. The existence of this gap will increase the probability of thermal runaway of the battery.

[0056] In view of this, an embodiment of the present application provides a battery, comprising a first battery cell and a second battery cell adjacent to each other, and a functional component, wherein the functional component is disposed within a gap formed between the first surface of the first battery cell and the second surface of the second battery cell; the battery further comprises a filling component and / or a first isolation component, wherein the filling component fills the edge of the gap formed between the first surface and the second surface, the first isolation component is closely attached to the edge of the third surface of the first battery cell and the fourth surface of the second battery cell, and covers the gap between the first surface and the second surface, wherein the third surface intersects with the first surface, and the fourth surface intersects with the second surface. By filling the gap between adjacent battery cells with the filling component and / or covering the gap between adjacent battery cells with the isolation component, the probability of particles falling into the gap between the battery cells can be reduced, and the probability of the battery cells generating insulation problems, thermal runaway problems, etc. can be reduced, thereby improving the overall performance of the battery.

[0057] The technical solutions described in the embodiments of the present application are applicable to various battery-using devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, electric vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0058] 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 an example.

[0059] For example, as shown in FIG1 , it is a structural diagram 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 10 may be provided inside the vehicle 1. The controller 12 is used to control the battery 10 to supply power to the motor 11. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1. For example, the battery 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 during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 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.

[0060] To meet different power requirements, a battery can include multiple battery cells, which can be connected in series, parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections. A battery can also be referred to as a battery pack. Alternatively, multiple battery cells can be connected in series, parallel, or in a hybrid configuration to form a battery module, which can then be connected in series, parallel, or in a hybrid configuration to form a battery. In other words, multiple battery cells can be directly connected to form a battery, or they can be first connected to form battery modules, which can then be connected to form a battery.

[0061] For example, as shown in FIG2 , a schematic diagram of the structure of a battery 10 according to an embodiment of the present application is provided. The battery 10 may include a plurality of battery cells 20. The battery 10 may further include a housing 100 (or housing), which has a hollow interior and houses the plurality of battery cells 20. As shown in FIG2 , the housing 100 may include two parts, referred to herein as a first housing 110 and a second housing 120, which are snap-fitted together. The shapes of the first housing 110 and the second housing 120 may be determined based on the shape of the plurality of battery cells 20. The first housing 110 and the second housing 120 may each have an opening. For example, the first housing 110 and the second housing 120 may each be a hollow rectangular parallelepiped with only one open face. The opening of the first housing 110 and the opening of the second housing 120 are arranged opposite each other, and the first housing 110 and the second housing 120 snap-fit ​​together to form a housing having a closed chamber. The plurality of battery cells 20 are connected in parallel, in series or in a mixed combination and placed in the box body 100 formed by buckling the first box body 110 and the second box body 120 .

[0062] Optionally, the battery 10 may also include other structures, which will not be described in detail here. For example, the battery 10 may also include a busbar component, which is used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can achieve electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0063] The number of battery cells 20 can be set to any value based on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or in a hybrid manner to achieve higher capacity or power. Since each battery 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be arranged in groups, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in each group of battery cells 20 is not limited and can be set according to requirements.

[0064] FIG3 is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application.

[0065] As shown in FIG3 , the battery cell 20 includes one or more electrode assemblies 22, a housing 211, and a cover plate 212. The walls of the housing 211 and the cover plate 212 are collectively referred to as the walls of the battery cell 20. The housing 211 is shaped according to the shape of the one or more electrode assemblies 22 after assembly. For example, the housing 211 may be a hollow rectangular parallelepiped, a cube, or a cylinder, and one of the faces of the housing 211 may have an opening so that the one or more electrode assemblies 22 can be placed within the housing 211. For example, when the housing 211 is a hollow rectangular parallelepiped or a cube, one of the planes of the housing 211 is an open face, i.e., the plane has no walls, allowing the inside and outside of the housing 211 to communicate. When the housing 211 is a hollow cylinder, the end faces of the housing 211 are open faces, i.e., the end faces have no walls, allowing the inside and outside of the housing 211 to communicate. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for placing the electrode assemblies 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0066] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member 23, also known as a current collecting member, which is located between the cover plate 212 and the electrode assembly 22 and electrically connects the electrode assembly 22 to the electrode terminals 214.

[0067] As shown in FIG3 , each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarity of the first electrode tab 221a and the second electrode tab 222a are opposite. For example, when the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab. The first electrode tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via a connecting member 23, and the second electrode tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one connecting member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via another connecting member 23.

[0068] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG3 , four independent electrode assemblies 22 are provided in the battery cell 20 .

[0069] As an example, a pressure relief mechanism 213 may be further provided on one wall of the battery cell 20. The pressure relief mechanism 213 is configured to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold.

[0070] Optionally, in one embodiment of the present application, the pressure relief mechanism 213 and the electrode terminal 214 are disposed on different walls of the battery cell 20. As an example, as shown in FIG3 , the electrode terminal 214 of the battery cell 20 may be disposed on the top wall of the battery cell 20, i.e., the cover plate 212. The pressure relief mechanism 213 is disposed on another wall of the battery cell 20 that is different from the top wall. For example, the pressure relief mechanism 213 is disposed on the bottom wall 215 opposite the top wall. For ease of illustration, the bottom wall 215 is separated from the housing 211 in FIG3 , but this does not limit the bottom side of the housing 211 to having an opening.

[0071] Alternatively, in another embodiment of the present application, the pressure relief mechanism 213 and the electrode terminal 214 are disposed on the same wall of the battery cell 20. For example, the electrode terminal 214 and the pressure relief mechanism 213 can both be disposed on the top wall of the battery cell 20, i.e., the cover plate 212.

[0072] The pressure relief mechanism 213 can be part of the wall in which it is located, or it can be a separate structure from the wall in which it is located, and fixed to the wall in which it is located by, for example, welding. For example, in the embodiment shown in Figure 3, when the pressure relief mechanism 213 is part of the bottom wall 215, the pressure relief mechanism 213 can be formed by providing a notch in the bottom wall 215, and the thickness of the bottom wall 215 corresponding to the notch is less than the thickness of the pressure relief mechanism 213 in other areas except the notch. The notch is the weakest point of the pressure relief mechanism 213. When the battery cell 20 generates too much gas, causing the pressure inside the shell 211 to rise and reach a threshold, or when the internal reaction of the battery cell 20 generates heat, causing the internal temperature of the battery cell 20 to rise and reach a threshold, the pressure relief mechanism 213 can rupture at the notch, causing the inside and outside of the shell 211 to communicate with each other. The gas pressure and temperature are released outward through the rupture of the pressure relief mechanism 213, thereby reducing the probability of explosion of the battery cell 20.

[0073] In addition, the pressure relief mechanism 213 may be any of various possible pressure relief mechanisms, which are not limited in the present embodiment. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 on which the pressure relief mechanism 213 is provided reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 on which the pressure relief mechanism 213 is provided reaches a threshold.

[0074] The above description, combined with FIG3 , illustrates a schematic structural diagram of a battery cell 20 provided in an embodiment of the present application. The following description, combined with FIG4-10 , illustrates a battery provided in an embodiment of the present application. FIG4-10 illustrates a cross-sectional view of a battery 10. It should be noted that, in some embodiments, the specific structure of the battery 10 may refer to that described in FIG1-3 .

[0075] As shown in Figures 4-10, an embodiment of the present application provides a battery 10, which includes a first battery cell 31 and a second battery cell 32 adjacent to each other, and a functional component 33, the functional component 33 is arranged in the gap formed by the first surface 311 of the first battery cell 31 and the second surface 321 of the second battery cell 32; a filling component 34 and / or a first isolation component 351, the filling component 34 fills the edge of the gap formed by the first surface 311 and the second surface 321, the first isolation component 351 is tightly attached to the edge of the third surface 312 of the first battery cell 31 and the fourth surface 322 of the second battery cell 32, and covers the gap between the first surface 311 and the second surface 321, the third surface 312 intersects with the first surface 311, and the fourth surface 322 intersects with the second surface 321.

[0076] The battery 10 in the embodiment of the present application may include at least two battery cells 20 , such as the first battery cell 31 and the second battery cell 32 in FIGS. 4-10 .

[0077] The functional component 33 is disposed between the first battery cell 31 and the second battery cell 32 and plays a certain role in improving the overall performance of the battery 10 . For example, it may be a thermal insulation pad, a cooling plate, a buffer pad, etc.

[0078] The battery 10 may include both a filling component 34 and a first isolation component 351, as shown in Figures 4 and 5, or may include either one of the two, as shown in Figures 6-10. For example, the battery 10 may include a filling component 34, and for example, the battery 10 may include a first isolation component 351. This application does not limit this.

[0079] The first surface 311 , the third surface 312 , the second surface 321 , and the fourth surface 322 are the outer surfaces of the first battery cell 31 and the second battery cell 32 , respectively. The first surface 311 and the second surface 321 are the surfaces forming the gap between the two battery cells 20 , or the two surfaces on the two battery cells 20 that are closest to each other.

[0080] The functional component 33 is disposed within the gap between adjacent battery cells 20. This can be understood as being disposed in the center or at one end of the first surface 311 and the second surface 321. This means that there is a height difference between the functional component 33 and the battery cells 20, and the functional component 33 cannot completely occupy the entire area of ​​the gap between adjacent battery cells 20. Furthermore, the functional component 33 can be closely attached to the first surface 311 and the second surface 321, or it can have a gap between it and the first surface 311 and / or the second surface 321. Optionally, the first surface 311 and the second surface 321 can be provided with a pressure relief mechanism, such as the pressure relief mechanism 213 shown in FIG. 3 .

[0081] The third surface 312 intersects the first surface 311. For example, for a prismatic battery cell 20, the third surface 312 and the first surface 311 are substantially perpendicular to each other and connected. Similarly, the fourth surface 322 intersects the second surface 321. For a prismatic battery cell 20, the fourth surface 322 and the second surface 321 are substantially perpendicular to each other.

[0082] The number of the filling component 34 can be one or more, such as two, which is not limited in this application. Similarly, the number of the isolation component 35 can be one or more, such as two, which is not limited in this application.

[0083] By filling the gaps between adjacent battery cells 20 with the filling component 34 and / or covering the gaps between adjacent battery cells 20 with the isolation component 35, the probability of particles falling into the gaps between the battery cells 20 can be reduced, and the probability of the battery cells 20 generating insulation problems, thermal runaway problems, etc. can be reduced, thereby improving the overall performance of the battery 10.

[0084] In some implementations, the filling component 34 fills other areas of the gap except the area occupied by the functional component 33 .

[0085] For example, the filling component 34 can be configured to have a shape that matches or fits with the functional component 33 based on the shape of the functional component 33, thereby filling the edge gap. In other words, the filling component 34 and the functional component 33 occupy the entire area of ​​the gap between two adjacent battery cells 20.

[0086] By setting the filling component 34 in other areas except the area occupied by the functional component 33, the gap between two adjacent battery cells 20 is completely filled, thereby improving the uniformity of the expansion of the battery cells 20, and further improving the cycle performance of the battery 10. At the same time, it can also reduce the probability of discharged particles falling into the gap between two adjacent battery cells 20 after one of the battery cells 20 has thermal runaway, reduce the probability of insulation problems, thermal runaway problems, etc. in the battery cells 20, and improve the overall performance of the battery 10.

[0087] Optionally, the filling component 34 may not match the shape of the functional component 33. For example, in FIG7 , the two ends of the functional component 33 are arc-shaped, and the filling component 34 is rectangular. After filling the edge gap, it is tangent to the functional component 33.

[0088] It should be understood that different areas of the gap between two adjacent battery cells 20 in the battery 10 can be filled with filling components 34. For example, in Figure 4, in addition to the two edge gaps in the y direction being filled with filling components 34, at least one edge gap in the z direction can also be filled with filling components 34. The x direction, y direction, and z direction are perpendicular to each other.

[0089] It is worth noting that the edge gap between two adjacent battery cells 20 in the battery 10 is caused by the functional component 33 set between the two battery cells 20. Due to the height difference between the functional component 33 and the battery cell 20, the functional component 33 cannot completely fill the gap between the battery cells 20.

[0090] In some implementations, a pressure relief mechanism is provided on the third surface 312 of the first battery cell 31, and / or a pressure relief mechanism is provided on the fourth surface 322 of the second battery cell 32; wherein the filling component 34 and / or the first isolation component 351 are provided closer to the pressure relief mechanism than the functional component 33. For example, the pressure relief mechanism may be the pressure relief mechanism 213 shown in FIG. 3 .

[0091] In an embodiment of the present application, the third surface 312 of the first battery cell 31 is provided with a pressure relief mechanism, and / or the fourth surface 322 of the second battery cell 32 is provided with a pressure relief mechanism, and the filling component 34 and / or the first isolation component 351 are arranged close to the pressure relief mechanism relative to the functional component 33. After the battery cell 20 has thermal runaway, the probability of particles discharged through the pressure relief mechanism falling into the gap between two adjacent battery cells 20 can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. in the battery cell 20 can be reduced, thereby improving the overall performance of the battery 10.

[0092] In some implementations, the filling member 34 and / or the first isolation member 351 have a melting point greater than or equal to 100° C. Thus, in the embodiment of the present application, by setting the melting point of the filling member 34 and / or the first isolation member 351 to be greater than or equal to 100° C., in the event of thermal runaway of the battery cell 20, the probability of insulation problems and thermal runaway problems caused by discharged particles falling between two adjacent battery cells 20 can be effectively reduced, thereby improving the overall performance of the battery 10.

[0093] In some implementations, the filling component 34 is provided to protrude from the third surface 312 of the first battery cell 31 and / or the fourth surface 322 of the second battery cell 32. Thus, in the embodiment of the present application, by providing the filling component 34 to protrude from the third surface 312 of the first battery cell 31 and / or the fourth surface 322 of the second battery cell 32, the probability of particles discharged from the battery cell 20 in the event of thermal runaway falling into the gap between two adjacent battery cells 20 can be further reduced, and the probability of insulation problems, thermal runaway problems, etc., occurring in the battery cell 20 can be reduced, thereby improving the overall performance of the battery 10.

[0094] In some implementations, a first electrode terminal 310 is provided on the third surface 312 of the first battery cell 31, and / or a second electrode terminal 320 is provided on the fourth surface 322 of the second battery cell 32; wherein the filling component 34 is provided no higher than the first electrode terminal 310 and / or the second electrode terminal 320. For example, the first electrode terminal 310 and / or the second electrode terminal 320 may be the electrode terminal 214 shown in FIG. 3 .

[0095] In the embodiment of the present application, a first electrode terminal 310 is provided on the third surface 312 of the first battery cell 31, and / or a second electrode terminal 320 is provided on the fourth surface 322 of the second battery cell 32, and the filling component 34 is not provided higher than the first electrode terminal 310 and / or the second electrode terminal 320, so as to reduce the impact of the filling component 34 on the first electrode terminal 310 and / or the second electrode terminal 320, thereby facilitating the processing and manufacturing of the battery 10. At the same time, it can reduce the probability of high-temperature particles discharged from the battery cell 20 in the event of thermal runaway falling into the gap between two adjacent battery cells 20, and reduce the probability of insulation problems, thermal runaway problems, etc. in the battery cell 20, thereby improving the overall performance of the battery 10.

[0096] In some implementations, the filling member 34 is flush with the first electrode terminal 310 and / or the second electrode terminal 320. Thus, in the embodiment of the present application, by flushing the filling member 34 with the first electrode terminal 310 and / or the second electrode terminal 320, the processing and manufacturing of the battery 10 are facilitated and the production cost is reduced.

[0097] In some implementations, the functional component 33 is disposed in the middle area between the first surface 311 and the second surface 321 , and the filling component 34 includes a first filling component 341 and a second filling component 342 , which are disposed in at least one of the two edge gaps between the first surface 311 and the second surface 321 .

[0098] In an embodiment of the present application, by arranging the first filling component 341 and the second filling component 342 in at least one of the two edge gaps between the first surface 311 and the second surface 321, the probability of high-temperature particles discharged from the battery cell 20 in the event of thermal runaway falling into the gap between two adjacent battery cells 20 can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. occurring in the battery cell 20 can be reduced, thereby improving the overall performance of the battery 10.

[0099] In some embodiments, the first filling component 341 is flush with the third surface 312 and the fourth surface 322, and / or the second filling component 342 is flush with the fifth surface 313 of the first battery cell 31 and the sixth surface 323 of the second battery cell 32, the third surface 312 is arranged opposite to the fifth surface 313, and the fourth surface 322 is arranged opposite to the sixth surface 323.

[0100] After filling the edge gap, the filling component 34 can be set flush with the surface of the battery cell near the edge. For example, as shown in Figure 4-10, for ease of understanding, directional words such as "upper" and "lower" are used here in conjunction with the accompanying drawings for explanation. The upper first filling component 341 can be flush with the upper third surface 312 and the fourth surface 322, and the lower second filling component 342 can be flush with the lower fifth surface 313 and the sixth surface 323. In other words, in the y direction, the first filling component 341 and the second filling component 342 are filled in the upper and lower edge gaps respectively, and are set flush with the corresponding surfaces.

[0101] For the square battery cell 20 , the third surface 312 may be parallel to the fifth surface 313 , and the fourth surface 322 may be parallel to the sixth surface 323 .

[0102] By setting the filling component 34 flush with the surface of the battery cell 20, the probability of discharged particles falling into the gap between two adjacent battery cells 20 after one of the battery cells 20 has thermal runaway can be reduced, the probability of the battery cells 20 having insulation problems, thermal runaway problems, etc. can be reduced, and the overall performance of the battery 10 can be improved.

[0103] In some embodiments, the third surface 312 of the first battery cell 31 is provided with a pressure relief mechanism, and / or the fourth surface 322 of the second battery cell 32 is provided with a pressure relief mechanism, one of the first filling component 341 and the second filling component 342 is close to the pressure relief mechanism, and the other is far away from the pressure relief mechanism, and the melting point of the one close to the pressure relief mechanism is higher than the melting point of the other far away from the pressure relief mechanism.

[0104] In an embodiment of the present application, one of the first filling component 341 and the second filling component 342 is close to the pressure relief mechanism, and the other is far away from the pressure relief mechanism. By setting the melting point of the one close to the pressure relief mechanism to be higher than the melting point of the other far away from the pressure relief mechanism, after the battery cell 20 has thermal runaway, the probability of particles discharged through the pressure relief mechanism falling into the gap between two adjacent battery cells 20 can be significantly reduced, and the probability of insulation problems, thermal runaway problems, etc. in the battery cell 20 is reduced, thereby improving the overall performance of the battery 10 and helping to reduce the manufacturing cost of the battery 10.

[0105] In an embodiment of the present application, as shown in Figure 5, the battery 10 may also include a second isolation component 352, and the second isolation component 352 may also be closely attached to the edge of the fifth surface 313 of the first battery cell 31 and the sixth surface 323 of the second battery cell 32, and cover the gap formed by the first surface 311 and the second surface 321, the fifth surface 313 intersects with the first surface 311, and the sixth surface 323 intersects with the second surface 321, wherein the third surface 312 and the fifth surface 313 are arranged opposite to each other, and the fourth surface 322 and the sixth surface 323 are arranged opposite to each other.

[0106] For ease of understanding, directional terms such as “upper” and “lower” may be used for description in conjunction with the accompanying drawings. As shown in FIG5 , the battery 10 may include a lower second isolation component 352 in addition to the upper first isolation component 351 .

[0107] By providing a second isolation component 352, the gaps between adjacent battery cells 20 are further covered, so that particles generated by thermal runaway and the like are less likely to enter the gaps between adjacent battery cells 20, thereby reducing the probability of insulation problems, thermal runaway problems, etc. occurring in the battery cells 20, and further improving the overall performance of the battery 10.

[0108] In some embodiments, the material of the first isolation component 351 and / or the second isolation component 352 is a thermoplastic resin or a thermoplastic polyester. For example, the material of the first isolation component 351 and / or the second isolation component 352 includes, but is not limited to, polypropylene, polyethylene terephthalate, polybutylene terephthalate, polyphenylene sulfide, and polyoxymethylene.

[0109] In an embodiment of the present application, by setting the material of the first isolation component 351 and / or the second isolation component 352 to a thermoplastic resin or thermoplastic polyester with strong plasticity, good chemical resistance and mechanical properties, after the battery cell 20 has thermal runaway, the probability of particles discharged through the battery 10 falling into the gap between two adjacent battery cells 20 can be significantly reduced, and the probability of the battery cell 20 having insulation problems, thermal runaway problems, etc. can be reduced, thereby improving the overall performance of the battery 10.

[0110] In the embodiment of the present application, the material of the filling component 34 is one of the following: rubber, silica gel, silicone glue, epoxy glue, and compressible foam.

[0111] Rubbers include EPDM (ethylene propylene diene monomer) rubber and silicone rubber. Filling adhesives are colloids that solidify when exposed to air or light, such as foaming adhesives, structural adhesives, silicone adhesives, and caulking agents. Compressible foams include polyurethane foam and melamine foam.

[0112] In the embodiment of the present application, by setting the material type of the filling component 34, the applicable material type can be flexibly used in different types of batteries 10, thereby reducing the probability of insulation problems, thermal runaway problems, etc. in the battery cells 20 and reducing the manufacturing cost of the battery 10.

[0113] In some implementations, the first isolation member 351 and / or the second isolation member 352 is a plate-like structure or a T-shaped structure with a protrusion, with at least a portion of the protrusion filling the edge of the gap. Thus, in the embodiments of the present application, by configuring the first isolation member 351 and / or the second isolation member 352 as a plate-like structure or a T-shaped structure with a protrusion, with at least a portion of the protrusion filling the edge of the gap, processing and assembly of the battery 10 are facilitated, and manufacturing costs are reduced.

[0114] An embodiment of the present application further provides an electrical device, which includes the battery 10 in the above embodiment, and the battery 10 is used to provide electrical energy to the electrical device.

[0115] Optionally, the electrical device may be a vehicle 1 , a ship, or a spacecraft.

[0116] Referring again to Figure 4, an embodiment of the present application provides a battery 10, which includes a first battery cell 31 and a second battery cell 32 adjacent to each other, and a functional component 33, the functional component 33 is arranged in a gap formed by a first surface 311 of the first battery cell 31 and a second surface 321 of the second battery cell 32; a filling component 34 and / or a first isolation component 351, the filling component 34 fills the gap formed by the first surface 311 and the second surface 321, except for the area occupied by the functional component 33, and is arranged flush with the third surface 312 of the first battery cell 31 and the fourth surface 322 of the second battery cell 32, the first isolation component 351 is tightly attached to the edges of the third surface 312 of the first battery cell 31 and the fourth surface 322 of the second battery cell 32, and covers the gap between the first surface 311 and the second surface 321, the third surface 312 intersects with the first surface 311, and the fourth surface 322 intersects with the second surface 321.

[0117] Although the present application has been described with reference to the above-described embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described 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 encompasses all technical solutions within the scope of the claims.

Claims

1. A battery, characterized in that: The battery (10) comprises: Adjacent first battery cells (31) and second battery cells (32), and a functional component (33), wherein the functional component (33) is disposed in a gap formed by a first surface (311) of the first battery cell (31) and a second surface (321) of the second battery cell (32); A filling component (34) and / or a first isolation component (351), wherein the filling component (34) fills the edge of the gap, the first isolation component (351) is closely attached to the edges of the third surface (312) of the first battery cell (31) and the fourth surface (322) of the second battery cell (32), and covers the gap formed by the first surface (311) and the second surface (321), the third surface (312) intersects with the first surface (311), and the fourth surface (322) intersects with the second surface (321).

2. The battery according to claim 1, characterized in that The filling component (34) fills other areas in the gap except the area occupied by the functional component (33).

3. The battery according to claim 1 or 2, characterized in that The third surface (312) of the first battery cell (31) is provided with a pressure relief mechanism, and / or the fourth surface (322) of the second battery cell (32) is provided with a pressure relief mechanism; Wherein, the filling component (34) and / or the first isolation component (351) are arranged close to the pressure relief mechanism relative to the functional component (33).

4. The battery according to any one of claims 1 to 3, characterized in that The melting point of the filling component (34) and / or the first isolation component (351) is greater than or equal to 100°C.

5. The battery according to any one of claims 1 to 4, characterized in that The filling component (34) is arranged to protrude from the third surface (312) of the first battery cell (31) and / or the fourth surface (322) of the second battery cell (32).

6. The battery according to claim 5, characterized in that The third surface (312) of the first battery cell (31) is provided with a first electrode terminal (310), and / or the fourth surface (322) of the second battery cell (32) is provided with a second electrode terminal (320); The filling component (34) is not arranged higher than the first electrode terminal (310) and / or the second electrode terminal (320).

7. The battery according to claim 6, characterized in that The filling component (34) is arranged flush with the first electrode terminal (310) and / or the second electrode terminal (320).

8. The battery according to any one of claims 1 to 7, characterized in that The functional component (33) is arranged in the middle area between the first surface (311) and the second surface (321); The filling component (34) includes a first filling component (341) and / or a second filling component (342), wherein the first filling component (341) and the second filling component (342) are arranged in at least one of the two edge gaps between the first surface (311) and the second surface (321).

9. The battery according to claim 8, characterized in that The first filling component (341) is flush with the third surface (312) and the fourth surface (322), and / or the second filling component (342) is flush with the fifth surface (313) of the first battery cell (31) and the sixth surface (323) of the second battery cell (32); Wherein, the third surface (312) is arranged opposite to the fifth surface (313), and the fourth surface (322) is arranged opposite to the sixth surface (323).

10. The battery according to claim 8 or 9, characterized in that The third surface (312) of the first battery cell (31) is provided with a pressure relief mechanism, and / or the fourth surface (322) of the second battery cell (32) is provided with a pressure relief mechanism; One of the first filling component (341) and the second filling component (342) is close to the pressure relief mechanism, and the other is far away from the pressure relief mechanism. The melting point of the one close to the pressure relief mechanism is higher than the melting point of the other far away from the pressure relief mechanism.

11. The battery according to any one of claims 1 to 10, characterized in that The battery (10) further includes a second isolation component (352), the second isolation component (352) being closely attached to the edges of the fifth surface (313) of the first battery cell (31) and the sixth surface (323) of the second battery cell (32), and covering the gap between the first surface (311) and the second surface (321), the fifth surface (313) intersecting with the first surface (311), and the sixth surface (323) intersecting with the second surface (321); Wherein, the third surface (312) is arranged opposite to the fifth surface (313), and the fourth surface (322) is arranged opposite to the sixth surface (323).

12. The battery according to claim 11, characterized in that The material of the first isolation component (351) and / or the second isolation component (352) is thermoplastic resin or thermoplastic polyester.

13. The battery according to any one of claims 1 to 12, characterized in that The material of the filling component (34) is one of the following: rubber, silica gel, silicone glue, epoxy glue, and compressible foam.

14. The battery according to claim 11 or 12, characterized in that The first isolation component (351) and / or the second isolation component (352) is a plate-shaped structure or a T-shaped structure with a protrusion, and at least a portion of the protrusion fills the edge of the gap.

15. An electrical device, characterized in that: The device comprises a battery (10) according to any one of claims 1 to 14, wherein the battery (10) is used to provide electrical energy to the electrical device.

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