Battery and electric device

Abstract

A battery (100) and an electric device. The battery (100) comprises a case (10), a first battery module (20), a second battery module (30) and a protection member (40), wherein the case (10) is provided with an accommodating cavity (11); the first battery module (20) and the second battery module (30) are arranged spaced apart from each other in the accommodating cavity (11); the first battery module (20) comprises a first current confluence member (21), and a plurality of first battery cells (22) connected to one side of the first current confluence member (21); the second battery module (30) comprises a second current confluence member (31), and a plurality of second battery cells (32) connected to one side of the second current confluence member (31), the first current confluence member (21) being arranged facing the second current confluence member (31); and the protection member (40) is connected between the first current confluence member (21) and the second current confluence member (31). The battery (100) is connected to and protects, by means of the protection member (40), the first current confluence member (21) and the second current confluence member (31) which are opposite each other, such that the possibility of a short circuit occurring between the first current confluence member (21) and the second current confluence member (31) due to the damage to the first current confluence member and the second current confluence member caused by high-temperature flue gas and particulate matter ejected from the battery cells is reduced, thereby reducing the risk of high-voltage ignition of the battery (100).

Description

Batteries and electrical devices

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 202410254542.5, entitled “A battery pack, a battery module, a battery cell and an electrical device,” filed on March 6, 2024, the entire contents of which are incorporated herein by reference.

[0003] It should be noted that the "protective part" in the present application is equivalent to the "insulating layer" in the prior application. Since the first busbar and the second busbar of the present application are between the electrode assemblies of the two battery modules, "the protective part is located between the first busbar and the second busbar" can also be understood as the protective part is located between the electrode assemblies of the two battery modules. Technical Field

[0004] The present application relates to the technical field of batteries, and more particularly, to a battery and an electrical device. Background Art

[0005] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0006] When the internal pressure or temperature of the battery cells inside the battery is too high, high-voltage ignition is prone to occur. How to reduce the possibility of high-voltage ignition is a research direction in battery technology.

[0007] Utility Model Content

[0008] The present application provides a battery and an electrical device, which can reduce the possibility of high-voltage ignition.

[0009] In the first aspect, an embodiment of the present application provides a battery, comprising a case, a first battery module, a second battery module and a protective member; the case is provided with a accommodating cavity; the first battery module and the second battery module are arranged at intervals in the accommodating cavity, the first battery module comprises a first bus and a plurality of first battery cells connected to one side of the first bus, the second battery module comprises a second bus and a plurality of second battery cells connected to one side of the second bus, the first bus is arranged facing the second bus; the protective member is located between the first bus and the second bus.

[0010] By adopting the above technical solution, a protective member is arranged between the first battery module and the second battery module. The protective member connects and protects the relative first and second busbars, thereby reducing the possibility of the first and second busbars being damaged by the high-temperature smoke and particulate matter ejected from the battery cells, resulting in insulation failure between the first and second busbars and causing a short circuit in the battery, thereby reducing the risk of high-voltage ignition of the battery.

[0011] In some embodiments of the present application, the first busbar is provided with opposite first and second surfaces, the second busbar is provided with opposite third and fourth surfaces, the first surface is arranged facing the third surface, the second surface is used to connect a plurality of the first battery cells, the fourth surface is used to connect a plurality of the second battery cells, and the protective member covers the first surface and / or the third surface.

[0012] By adopting the above technical solution, the first surface and the second surface are covered by the protective member, thereby better protecting the first surface and the second surface, and further reducing the risk of damage to the first surface and the second surface.

[0013] In some embodiments of the present application, the first busbar is provided with a first side surface located between the first surface and the second surface, the second busbar is provided with a second side surface located between the third surface and the fourth surface, and the protective member covers the first side surface and / or the second side surface.

[0014] By adopting the above technical solution, the first side surface and / or the second side surface are protected by the protective member, thereby further reducing the risk of the first and second busbars being damaged by high-temperature flue gas and particulate matter.

[0015] In some embodiments of the present application, the protective member covers a portion of the second surface, and / or the protective member covers a portion of the fourth surface.

[0016] By adopting the above technical solution, the second surface and / or the fourth surface are protected by the protective member, which further reduces the risk of the first and second busbars being damaged by high-temperature flue gas and particulate matter.

[0017] In some embodiments of the present application, a plurality of first busbars are arranged at intervals on the second surface, the first busbars are used to conductively connect the first battery cells, and the portion of the protective member located on the second surface fills the gap between two adjacent first busbars; and / or, a plurality of second busbars are arranged at intervals on the fourth surface, the second busbars are used to conductively connect the second battery cells, and the portion of the protective member located on the fourth surface fills the gap between two adjacent second busbars.

[0018] By adopting the above technical solution, the protective member is used to fill the gap between two adjacent confluence parts, thereby further reducing the risk of the first confluence member and the second confluence member being damaged by high-temperature flue gas and particulate matter.

[0019] In some embodiments of the present application, the first battery cell has a first side and a second side, the first bus is located on the first side of the plurality of first battery cells, and the second side is provided with a first pressure relief mechanism; and / or, the second battery cell has a third side and a fourth side, the first bus is located on the third side of the plurality of first battery cells, and the fourth side is provided with a second pressure relief mechanism.

[0020] By adopting the above technical solution, the first convergence piece and the first pressure relief mechanism are arranged on different sides of the first battery cell, and the second convergence piece and the second pressure relief mechanism are arranged on different sides of the second battery cell, so that there is a certain spraying distance between the first convergence piece and the first pressure relief mechanism, and between the second convergence piece and the second pressure relief mechanism. The high-temperature gas and particles sprayed by the first pressure relief mechanism will not be sprayed toward the first convergence piece at the first time, and the high-temperature gas and particles sprayed by the second pressure relief mechanism will not be sprayed toward the second convergence piece at the first time, thereby reducing the possibility of high-temperature gas and particles directly damaging the first convergence piece and the second convergence piece.

[0021] In some embodiments of the present application, the first side and the second side are opposite sides or adjacent sides, and / or the third side and the fourth side are opposite sides or adjacent sides.

[0022] By adopting the above technical solution, the first busbar and the first pressure relief mechanism are arranged on the adjacent side or opposite side of the first battery cell, and the second busbar and the second pressure relief mechanism are arranged on the adjacent side or opposite side of the second battery cell, thereby extending the path for high-temperature gas and particles to reach the first busbar and the second busbar, and further reducing the possibility of high-temperature gas and particles directly damaging the first busbar and the second busbar.

[0023] In some embodiments of the present application, along a first direction, a distance between the first busbar and the second busbar is greater than or equal to 5 mm, and the first direction is an arrangement direction from the first battery module to the second battery module.

[0024] Using the above technical solution, the distance between the first busbar and the second busbar is designed to be greater than or equal to 5 mm, so that there is enough space between the first busbar and the second busbar to place the protective part. At the same time, the first busbar and the second busbar can also have enough electrical gap to reduce the possibility of voltage breakdown.

[0025] In some embodiments of the present application, at least one third pressure relief mechanism is provided on the box body.

[0026] By adopting the above technical solution, a third pressure relief mechanism is provided on the box body. When the pressure or temperature inside the box body reaches a certain value, the third pressure relief mechanism opens to reduce the possibility of explosion or fire of the box body caused by excessive pressure or temperature inside the box body.

[0027] In some embodiments of the present application, there are multiple third pressure relief mechanisms, and the multiple third pressure relief mechanisms are arranged around the first battery module and the second battery module.

[0028] By adopting the above technical solution, the third pressure relief mechanism is designed to be multiple and surrounds the first battery module and the second battery module. The multiple third pressure relief mechanisms can discharge smoke or particles more quickly.

[0029] In some embodiments of the present application, the protective member is an insulating member.

[0030] By adopting the above technical solution, the protective part is designed as an insulating part, which is used to block high-temperature flue gas and particles, reducing the possibility of insulation failure caused by high-temperature flue gas causing the first and second busbars to be conductive, thereby reducing the risk of high-voltage ignition.

[0031] In some embodiments of the present application, the melting point of the protective member is greater than or equal to 200°C.

[0032] By adopting the above technical solution and designing the melting point of the protective member to be greater than or equal to 200° C., the possibility of the protective member melting under the action of high-temperature flue gas and particles can be reduced.

[0033] In a second aspect, an embodiment of the present application provides an electrical device, comprising the above-mentioned battery, which is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. 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 creative work.

[0035] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0036] FIG2 is an exploded view of a battery according to an embodiment of the present application;

[0037] FIG3 is a schematic structural diagram of a first battery cell provided in some embodiments of the present application;

[0038] FIG4 is a schematic diagram of a partial structure of a battery according to an embodiment of the present application;

[0039] FIG5 is a cross-sectional view taken along line AA of FIG3 ;

[0040] FIG6 is a schematic diagram of a partial structure of a battery according to another embodiment of the present application;

[0041] FIG7 is a BB cross-sectional view of FIG3 ;

[0042] FIG8 is a schematic structural diagram of a first current collector and a second current return collector of a battery according to another embodiment of the present application.

[0043] The reference numerals of the specific embodiments are as follows:

[0044] 1000, vehicle;

[0045] 100. Battery;

[0046] 10. Box body; 11. Accommodation chamber; 12. First portion; 121. Bottom wall; 122. Side wall; 13. Second portion; 14. Third pressure relief mechanism;

[0047] 20. First battery module; 21. First busbar; 211. First surface; 212. Second surface; 213. First side; 214. First busbar; 22. First battery cell; 221. End cap assembly; 222. Housing; 223. Electrode terminal; 224. First side; 225. Second side; 23. First thermal insulation pad; 24. First pressure relief mechanism;

[0048] 30. Second battery module; 31. Second busbar; 311. Third surface; 312. Fourth surface; 313. Second side surface; 32. Second battery cell; 321. Third side surface; 322. Fourth side surface; 33. Second thermal insulation pad; 34. Second pressure relief mechanism;

[0049] 40. Protective parts;

[0050] 200, controller;

[0051] 300, motor;

[0052] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0054] 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.

[0055] 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.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0057] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0058] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0059] The term "plurality" used in this application refers to two or more (including two).

[0060] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0061] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a casing that encloses one or more battery cells. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0062] The battery cell mentioned in the embodiments of the present application may include an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode collector; the positive electrode collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area, the positive electrode coating area is coated with a positive electrode active material layer, and the positive electrode tab is not coated with a positive electrode active material layer. Taking a lithium-ion battery cell as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material layer includes a positive electrode active material. The positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, which is coated on the surface of the current collector. The negative current collector includes a negative coating region and a negative tab connected to the negative coating region. The negative coating region is coated with the negative active material layer, while the negative tab is not coated with the negative active material layer. The negative current collector can be made of copper, and the negative active material layer includes a negative active material, which can be carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene).

[0063] Currently, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application of power batteries continues to expand, market demand is also growing.

[0064] As the energy density of batteries gradually increases, the voltage of batteries can reach as high as 1000V. When high temperature and high pressure occur inside the battery cells, the high-temperature flue gas and particulate matter brought out by the pressure relief mechanism of the battery cells pose a great threat to the insulation interface of the battery system. Especially when the busbars of two adjacent battery modules are damaged, the high-temperature flue gas and particulate matter can easily cause insulation failure between the two battery modules, reduce creepage distance, reduce electrical clearance, and cause a short circuit between the two battery modules, which in turn leads to high-voltage sparks in the battery.

[0065] Therefore, how to reduce the possibility of high-voltage ignition is an important topic in the research and development of battery cells and related components.

[0066] In view of this, the present application provides a technical solution, which uses a protective part to connect and block the two busbars of two adjacent battery modules, thereby reducing the risk of insulation failure of the two busbars and thus reducing the possibility of high-voltage ignition in the battery.

[0067] The battery cells described in the embodiments of the present application are suitable for use in batteries and electrical devices using the batteries.

[0068] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0069] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0070] As shown in FIG1 , the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0071] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0072] As shown in Figure 2, an embodiment of the present application provides a battery 100, including a case 10, a first battery module 20, a second battery module 30 and a protective member 40; the case 10 is provided with a accommodating cavity 11; the first battery module 20 and the second battery module 30 are arranged at intervals in the accommodating cavity 11, the first battery module 20 includes a first bus 21 and a plurality of first battery cells 22 connected to one side of the first bus 21, the second battery module 30 includes a second bus 31 and a plurality of second battery cells 32 connected to one side of the second bus 31, the first bus 21 is arranged facing the second bus 31; the protective member 40 is located between the first bus 21 and the second bus 31.

[0073] The housing 10 is used to provide a storage space for the battery 100 cells, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 can include a first portion 12 and a second portion 13, which cover each other and together define a storage space for accommodating the battery 100 cells. The first portion 12 can be a hollow structure with one end open, and the second portion 13 can be a plate-like structure, which covers the open side of the first portion 12, so that the first portion 12 and the second portion 13 together define a storage space; the first portion 12 and the second portion 13 can also be hollow structures with one end open, and the open side of the first portion 12 covers the open side of the second portion 13 (this embodiment is not shown in the figure). Of course, the housing 10 formed by the first portion 12 and the second portion 13 can be a variety of shapes, such as a cylinder, a cuboid, etc.

[0074] In the first battery module 20, there can be multiple first battery cells 22. The multiple first battery cells 22 can be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple first battery cells 22 are connected both in series and in parallel. The multiple first battery cells 22 can be directly connected in series, in parallel, or in a mixed connection. The first battery module 20 composed of the multiple first battery cells 22 is then housed in the casing 10, with a second thermal insulation pad 33 provided between adjacent first battery cells 22 for thermal insulation. Of course, the first battery module 20 can also be formed by first connecting multiple first battery cells 22 in series, in parallel, or in a mixed connection to form a module. The multiple modules are then connected in series, in parallel, or in a mixed connection to form the first battery module 20, which is then housed in the casing 10.

[0075] Similarly, in the first battery module 20, the number of second battery cells 32 can be multiple, and the multiple second battery cells 32 can be connected in series, in parallel, or in a mixed connection. Mixed connection means that the multiple second battery cells 32 are both connected in series and in parallel. The multiple second battery cells 32 can be directly connected in series, in parallel, or in a mixed connection. The second battery module 30 composed of the multiple second battery cells 32 is then accommodated in the casing 10. A second thermal insulation pad 33 is provided between two adjacent second battery cells 32 for thermal insulation. The second thermal insulation pad 33 and the above-mentioned first thermal insulation pad 23 can be made of any one or more of polyethylene, polypropylene, polytetrafluoroethylene, silicone, and ceramic fiber. Of course, the second battery module 30 can also be a module formed by first connecting multiple second battery cells 32 in series, in parallel, or in a mixed connection. The multiple battery modules are then connected in series, in parallel, or in a mixed connection to form the second battery module 30, which is then accommodated in the casing 10.

[0076] Each first battery cell 22 or each second battery cell 32 can be a secondary battery 100 or a primary battery 100, or can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The first battery cell 22 and the second battery cell 32 can be cylindrical, flat, rectangular, or other shapes.

[0077] 3 , the first battery cell 22 and the second battery cell 32 of this embodiment are both the smallest units constituting the battery 100 , and their structures are the same or similar. Therefore, this embodiment only describes the structure of the first battery cell 22 , and the structure of the second battery cell 32 may refer to the first battery cell 22 of this embodiment.

[0078] The first battery cell 22 includes an end cap assembly 221, a housing 222, and an electrode assembly (not shown) located within the housing 222. The end cap assembly 221 covers the opening (not shown) of the housing 222 to isolate the internal environment of the battery cell 100 from the external environment. The shape of the end cap assembly 221 can be adapted to the shape of the housing 222 to fit the housing 222. Optionally, the end cap assembly 221 can be made of a material with a certain hardness and strength (such as aluminum alloy). This reduces deformation during compression and collision, providing the battery cell 100 with greater structural strength and improved safety. Functional components such as electrode terminals 223 can be provided on the end cap assembly 221. The electrode terminals 223 can be electrically connected to the electrode assembly via an adapter (not shown) to transmit or receive electrical energy from the battery cell 100. The electrode assembly is the component within the battery 100 where electrochemical reactions occur.

[0079] One or more electrode assemblies may be contained within the housing 222. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The portion of the positive electrode sheet and the negative electrode sheet with active material constitutes the main body of the electrode assembly, and the portion of the positive electrode sheet and the negative electrode sheet without active material each constitutes a tab. The positive electrode tab and the negative electrode tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 100, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs are connected to the electrode terminals 223 to form a current loop.

[0080] The housing 222 is a component that cooperates with the end cap assembly 221 to form the internal environment of the battery cell 100. This internal environment can accommodate the electrode assembly, electrolyte, and other components. The housing 222 and end cap assembly 221 can be separate components. An opening can be provided in the housing 222, and the end cap assembly 221 covers the opening to form the internal environment of the battery cell 100. Alternatively, the end cap assembly 221 and the housing 222 can be integrated. Specifically, the end cap assembly 221 and the housing 222 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 222 needs to be sealed, the end cap assembly 221 is then attached to the housing 222. The housing 222 can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, or a hexagonal prism. Specifically, the shape of the housing 222 can be determined based on the specific shape and size of the electrode assembly. The housing 222 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, and plastic, and this embodiment of the present application does not impose any particular limitations on this.

[0081] Referring again to FIG. 2 , the first busbar 21 is used to realize electrical connection between a plurality of first battery cells 22 , and the second busbar 31 is used to realize electrical connection between a plurality of second battery cells 32 . The electrical connection includes parallel or series connection between two electrical components. One side of the busbar is usually used to connect the battery 100 cells, and the other side is an insulating interface.

[0082] In this embodiment, the first bus 21 is arranged facing the second bus 31, which may mean that one surface of the first bus 21 (such as the first surface 211 described below) is arranged facing a surface of the second bus 31 (such as the third surface 311 described below).

[0083] The protective member 40 can be connected between the first bus 21 and the second bus 31 by hot melting, welding, glue filling, etc. By connecting and protecting the relative first bus 21 and second bus 31 through the protective member 40, the possibility of high-temperature smoke and particulate matter ejected from the battery 100 monomer damaging the first bus 21 and the second bus 31, resulting in failure of the insulation interface between the first bus 21 and the second bus 31, is reduced. The possibility of short circuit between the first battery module 20 and the second battery module 30 due to insulation failure between the first bus 21 and the second bus 31 is reduced, thereby reducing the risk of high-voltage ignition of the battery 100.

[0084] As shown in Figures 2, 4 and 5, in some examples, optionally, the first busbar 21 is provided with opposite first and second surfaces 211 and 212, the second busbar 31 is provided with opposite third and fourth surfaces 311 and 312, the first surface 211 is arranged facing the third surface 311, the second surface 212 is used to connect multiple first battery cells 22, the fourth surface 312 is used to connect multiple second battery cells 32, and the protective member 40 covers the first surface 211 and / or the third surface 311.

[0085] Along the first direction X, the first surface 211 and the second surface 212 are respectively located on opposite sides or opposite sides of the first bus 21, and the third surface 311 and the fourth surface 312 are respectively located on opposite sides of the second bus 31. The first direction X is the arrangement direction of the first battery module 20 to the second battery module 30. The first bus 21 and the second bus 31 are located between the first battery module 20 and the second battery module 30, and the protective component 40 is located between the first bus 21 and the second bus 31.

[0086] The protective member 40 covers the first surface 211 and / or the third surface 311, which means that the protective member 40 can only cover the first surface 211, or only cover the third surface 311, or the protective member 40 covers the first surface 211 and the second surface 212 on both sides along the first direction X respectively. Covering means that the protective member 40 is connected to the first surface 211 or the second surface 212, and there is no exposed area on the first surface 211 or the second surface 212. By covering the first surface 211 and the second surface 212 by the protective member 40, the first surface 211 and the second surface 212 are better protected, so that the first surface 211 and the second surface 212 are electrically separated from the rest of the space in the box body 10, further reducing the risk of damage to the first surface 211 and the second surface 212.

[0087] As shown in FIG8 , in some examples, optionally, the first busbar 21 has a first side surface 213 located between the first surface 211 and the second surface 212 , the second busbar 31 has a second side surface 313 located between the third surface 311 and the fourth surface 312 , and the protective member 40 covers the first side surface 213 and / or the second side surface 313 .

[0088] The first side surface 213 refers to the side surface of the first busbar 21 located between the first surface 211 and the second surface 212. The first side surface 213 can be one surface or multiple surfaces. For example, when the first busbar 21 of this embodiment is in the shape of a rectangular plate as shown in the figure, the first side surface 213 can be a rectangular side surface, or one of the planes of the rectangular side surface. For another example, when the first busbar 21 of this embodiment is in the shape of a circular plate, the first side surface 213 can be a circumferential surface.

[0089] Similarly, the second side surface 313 may also be a side surface of the second current collector 31 located between the third surface 311 and the fourth surface 312 , and the second side surface 313 may also be one surface or multiple surfaces.

[0090] There are three situations in which the protective member 40 covers the first side 213 and / or the second side 313. One is that the protective member 40 only covers the first side 213, another is that the protective member 40 only covers the second side 313, and yet another is that the protective member 40 covers both the first side 213 and the second side 313. By protecting the first side 213 and / or the second side 313 through the protective member 40, the risk of the first conduit 21 and the second conduit 31 being damaged by high-temperature flue gas and particulate matter is further reduced.

[0091] In some examples, optionally, the protective member 40 covers a portion of the second surface 212 , and / or the protective member 40 covers a portion of the fourth surface 312 .

[0092] The protective member 40 may only cover a portion of the second surface 212, or the protective member 40 may only cover a portion of the fourth surface 312, or the protective member 40 may cover a portion of the second surface 212 and the fourth surface 312 at the same time. The reason why the protective member 40 cannot completely cover the second surface 212 and the fourth surface 312 is that the second surface 212 needs to reserve a portion that is electrically connected to the first battery cell 22 (for example, for installing the first conduit 214 described below), and the fourth surface 312 needs to reserve a portion that is electrically connected to the second battery cell 32 (for example, for installing the second conduit described below).

[0093] In this embodiment, the second surface 212 and / or the fourth surface 312 are protected by the protective member 40 , thereby further reducing the risk of the first conduit 21 and the second conduit 31 being damaged by high-temperature flue gas and particulate matter.

[0094] As shown in Figures 2 and 8, a plurality of first busbars 214 are arranged at intervals on the second surface 212, and the first busbars 214 are used to conductively connect the first battery cells 22, and a portion of the protective member 40 located on the second surface 212 fills the gap between two adjacent first busbars 214; and / or, a plurality of second busbars (not shown in the figures) are arranged at intervals on the fourth surface 312, and the second busbars are used to conductively connect the second battery cells 32, and a portion of the protective member 40 located on the fourth surface 312 fills the gap between two adjacent second busbars.

[0095] Since the first conduit 21 and the second conduit 31 of this embodiment have the same or similar structures, this embodiment only illustrates the first conduit portion 214 of the second surface 212. The second conduit portion on the fourth surface 312 can refer to the first conduit portion 214 of this embodiment.

[0096] The first confluence portion 214 can be embedded in the second surface 212, or protrude from the second surface 212. When the first confluence portion 214 of this embodiment protrudes from the second surface 212, a certain gap is formed between the two adjacent first confluence portions 214. The protective member 40 fills the gap between the two adjacent confluence portions, which can reduce the risk of high-temperature flue gas or particles directly damaging the second surface 212 of the gap portion, and can also reduce the risk of unnecessary conduction between the two adjacent first confluence portions 214, further reducing the possibility of the first confluence member 21 and the second confluence member 31 being damaged by high-temperature flue gas and particulate matter, resulting in insulation failure.

[0097] In some examples, optionally, the first battery cell 22 has a first side 224 and a second side 225, the first bus 21 is located on the first side 224 of the plurality of first battery cells 22, and the second side 225 is provided with a first pressure relief mechanism 24; and / or, the second battery cell 32 has a third side 321 and a fourth side 322, the first bus 21 is located on the third side 321 of the plurality of first battery cells 22, and the fourth side 322 is provided with a second pressure relief mechanism 34.

[0098] The “side” in the first side 224 , the second side 225 , the third side 321 and the fourth side 322 may refer to a lateral area, a side edge or a side surface.

[0099] The above technical solution includes at least three structural forms. One is that the first manifold 21 and the first pressure relief mechanism 24 are located on different sides, while the second manifold 31 and the second pressure relief mechanism 34 are on the same side. Another is that the first manifold 21 and the first pressure relief mechanism 24 are located on the same side, while the second manifold 31 and the second pressure relief mechanism 34 are on different sides. Still another is that the first manifold 21 and the first pressure relief mechanism 24 are located on different sides, while the second manifold 31 and the second pressure relief mechanism 34 are on different sides.

[0100] Among them, the first pressure relief mechanism 24 and the second pressure relief mechanism 34 refer to elements or components that are actuated to release the internal pressure or temperature when the internal pressure or temperature of the battery 100 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and isolation membrane in the battery 100. The pressure relief mechanism can take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery 100 reaches a predetermined threshold, the pressure relief mechanism performs an action or the weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0101] When the first busbar 21 and the first pressure relief mechanism 24 are arranged on different sides of the first battery cell 22, and the second busbar 31 and the second pressure relief mechanism 34 are arranged on different sides of the second battery cell 32, a certain spraying distance is provided between the first busbar 21 and the first pressure relief mechanism 24, and between the second busbar 31 and the second pressure relief mechanism 34. The high-temperature gas and particles sprayed by the first pressure relief mechanism 24 will not be sprayed toward the first busbar 21 at the first time, and the high-temperature gas and particles sprayed by the second pressure relief mechanism 34 will not be sprayed toward the second busbar 31 at the first time, thereby reducing the possibility of the high-temperature gas and particles directly damaging the first busbar 21 and the second busbar 31.

[0102] 4-7 , in some examples, optionally, the first side 224 and the second side 225 are opposite sides or adjacent sides, and / or the third side 321 and the fourth side 322 are opposite sides or adjacent sides.

[0103] "Opposite sides" refers to two side surfaces that are opposite in a direction (e.g., the first direction X in the figure). "Adjacent sides" refers to two side surfaces that are adjacent in a direction (e.g., the second direction Y in the figure, which is perpendicular to the first direction X), and the two side surfaces form an angle greater than 0° and less than or equal to 90°.

[0104] The above technical solution has multiple possible implementations. For example, as shown in Figures 1, 4 and 5, the first side 224 and the second side 225 are opposite sides along the first direction X, and the third side 321 and the fourth side 322 are also opposite sides along the first direction X.

[0105] For another example, as shown in FIG6 and FIG7 , the first side 224 and the second side 225 are two adjacent sides along the second direction Y, and the third side 321 and the fourth side 322 are two adjacent sides along the second direction Y.

[0106] For another example, the first side 224 and the second side 225 are opposite sides, the third side 321 and the fourth side 322 are adjacent sides, or the first side 224 and the second side 225 are adjacent sides, the third side 321 and the fourth side 322 are opposite sides (the above two embodiments are not shown in the figure).

[0107] The above-mentioned arrangement of the first convergence piece 21 and the first pressure relief mechanism 24 on the adjacent side or opposite side of the first battery cell 22, and the arrangement of the second convergence piece 31 and the second pressure relief mechanism 34 on the adjacent side or opposite side of the second battery cell 32, extends the path for the high-temperature gas and particles to reach the first convergence piece 21 and the second convergence piece 31. The high-temperature gas and particles ejected by the first pressure relief mechanism 24 and the second pressure relief mechanism 34 will not be directly ejected toward the first convergence piece 21 and the second convergence piece 31, reducing the possibility of the high-temperature gas and particles directly damaging the first convergence piece 21 and the second convergence piece 31.

[0108] Referring again to FIG. 2 , FIG. 4 and FIG. 6 , in some examples, optionally, at least one third pressure relief mechanism 14 is provided on the box body 10 .

[0109] When the pressure or temperature inside the box 10 reaches a certain value, the third pressure relief mechanism 14 opens to reduce the possibility of explosion or fire in the box 10 caused by excessive pressure or temperature inside the box 10. Since the structure and function of the third pressure relief mechanism 14 are similar to those of the first pressure relief mechanism 24 and the second pressure relief mechanism 34 described above, they will not be described in detail in this embodiment.

[0110] In some examples, optionally, there are multiple third pressure relief mechanisms 14 , and the multiple third pressure relief mechanisms 14 are arranged around the first battery module 20 and the second battery module 30 .

[0111] The first portion 12 may include a bottom wall 121 and side walls 122. The number of side walls 122 may be multiple. The third pressure relief mechanisms 14 may be arranged at intervals along the side walls 122 and surround the entire first battery module 20 and second battery module 30 of this embodiment. This allows high-temperature gas and the housing 222 within the box 10 to be discharged more quickly through the multiple third pressure relief mechanisms 14. Of course, the third pressure relief mechanisms 14 may also be provided on the bottom wall 121 and the second portion 13 (this embodiment is not shown in the figures).

[0112] At least one third pressure relief mechanism 14 may be disposed facing one or more first pressure relief mechanisms 24 , and / or at least one third pressure relief mechanism 14 may be disposed facing one or more second pressure relief mechanisms 34 .

[0113] The above technical solution includes various implementations. For example, one third pressure relief mechanism 14 may face one or more first pressure relief mechanisms 24, or multiple third pressure relief mechanisms 14 may face one or more first pressure relief mechanisms 24, respectively. Alternatively, one third pressure relief mechanism 14 may face one or more second pressure relief mechanisms 34, or multiple third pressure relief mechanisms 14 may face one or more second pressure relief mechanisms 34, respectively. Alternatively, a portion (greater than or equal to one) of the third pressure relief mechanisms 14 may face the first pressure relief mechanism 24, and another portion (greater than or equal to one) of the third pressure relief mechanisms 14 may face the second pressure relief mechanism 34.

[0114] In this way, the third pressure relief mechanism 14 can be placed closer to the first pressure relief mechanism 24 or the second pressure relief mechanism 34 , and the smoke or particles discharged from the first pressure relief mechanism 24 and the second pressure relief mechanism 34 can be directly discharged through the third pressure relief mechanism 14 when the pressure or temperature is too high.

[0115] In some examples, optionally, the protection member 40 is an insulating member.

[0116] There are various structural forms in which the protective member 40 is an insulating member. One is that the insulating member is made of a single material, which can be any insulating material. Another is that the protective member 40 is internally made of a single material, which can be insulating or non-insulating, and is provided with a protective layer on the outside of the protective member 40, so that the protective member 40 forms an insulating member.

[0117] The protective member 40 is designed as an insulating member, which can be used to block high-temperature flue gas and particles, reducing the possibility of high-temperature flue gas causing the first busbar 21 and the second busbar 31 to be conductive and causing insulation failure, thereby reducing the risk of high-voltage ignition.

[0118] In some examples, optionally, the melting point of the protective member 40 is greater than or equal to 200°C.

[0119] By designing the melting point of the protective member 40 to be greater than or equal to 200° C., the possibility of the protective member 40 melting under the action of high-temperature flue gas and particles can be reduced, thereby providing better protection for the first and second conduit members 21 and 31 .

[0120] The material of the protective part 40 can be an insulating material with a melting point greater than or equal to 200°C, such as polytetrafluoroethylene, silicone rubber, polyetheretherketone, etc., which are not listed one by one in this embodiment. The protective part 40 can be connected between the first busbar 21 and the second busbar 31 by hot melting, welding, bonding, and glue filling.

[0121] 4-7 , in some examples, optionally, along a first direction X, a spacing L between the first busbar 21 and the second busbar 31 is greater than or equal to 5 mm, and the first direction X is the arrangement direction of the first battery module 20 to the second battery module 30 .

[0122] The distance L between the first current collector 21 and the second current collector 31 is greater than or equal to 5 mm. For example, L may be 5 mm to 100 mm, such as 5 mm, 10 mm, 20 mm, 50 mm, and 100 mm.

[0123] The distance L between the first bus 21 and the second bus 31 is not only the electrical gap between the two, but also the installation space for the protective part 40. The distance between the first bus 21 and the second bus 31 is designed to be greater than or equal to 5 mm, so that there is enough space between the first bus 21 and the second bus 31 to place the protective part 40. At the same time, it can also ensure that the first bus 21 and the second bus 31 have enough electrical gap to reduce the possibility of voltage breakdown between the two.

[0124] Finally, please refer to Figures 2-8. An embodiment of the present application provides a battery 100, including a case 10, a first battery module 20, a second battery module 30 and a protective member 40; the case 10 is provided with a accommodating cavity 11; the first battery module 20 and the second battery module 30 are arranged at intervals in the accommodating cavity 11, the first battery module 20 includes a first bus 21 and a plurality of first battery cells 22 connected to one side of the first bus 21, the second battery module 30 includes a second bus 31 and a plurality of second battery cells 32 connected to one side of the second bus 31, and the first bus 21 is arranged facing the second bus 31; the protective member 40 is located between the first bus 21 and the second bus 31. The first busbar 21 has opposing first and second surfaces 211 and 212, and the second busbar 31 has opposing third and fourth surfaces 311 and 312. The first surface 211 faces the third surface 311. The second surface 212 is used to connect a plurality of first battery cells 22, and the fourth surface 312 is used to connect a plurality of second battery cells 32. The protective member 40 covers the first surface 211 and / or the third surface 311. The first busbar 21 has a first side 224 located between the first and second surfaces 211 and 212, and the second busbar 31 has a second side 225 located between the third and fourth surfaces 311 and 312. The protective member 40 covers the first side 224 and / or the second side 225. The protective member 40 covers a portion of the second surface 212 and / or a portion of the fourth surface 312. Multiple first busbars 214 are spaced apart on the second surface 212. The first busbars 214 are used to electrically connect the first battery cells 22. A portion of the protective member 40 located on the second surface 212 fills the space between two adjacent first busbars 214. Alternatively, multiple second busbars are spaced apart on the fourth surface 312. The second busbars are used to electrically connect the second battery cells 32. A portion of the protective member 40 located on the fourth surface 312 fills the space between two adjacent second busbars. The first battery cells 22 have a first side 224 and a second side 225. The first busbar 21 is located on the first side 224 of the plurality of first battery cells 22, and the second side 225 is provided with a first pressure relief mechanism 24. Alternatively, the second battery cells 32 have a third side 321 and a fourth side 322. The first busbar 21 is located on the third side 321 of the plurality of first battery cells 22, and the fourth side 322 is provided with a second pressure relief mechanism 34. The first side 224 and the second side 225 are opposite or adjacent sides, and / or the third side 321 and the fourth side 322 are opposite or adjacent sides. The housing 10 is provided with at least one third pressure relief mechanism 14. There are multiple third pressure relief mechanisms 14, which are arranged around the first battery module 20 and the second battery module 30. The protective member 40 is an insulating member. The melting point of the protective member 40 is greater than or equal to 200°C.Along the first direction X, the distance between the first current collector 21 and the second current collector 31 is greater than or equal to 5 mm. The first direction X is the arrangement direction of the first battery module 20 to the second battery module 30 .

[0125] Based on the above-mentioned battery 100 , an embodiment of the present application further provides an electrical device, including the above-mentioned battery 100 , wherein the battery 100 is used to provide electrical energy to the electrical device, and the electrical device may be a vehicle 1000 .

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for the intermediate technical features. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A battery, characterized in that: include: The box body is provided with a receiving cavity; a first battery module and a second battery module, spaced apart and arranged in the accommodating cavity, wherein the first battery module comprises a first busbar and a plurality of first battery cells connected to one side of the first busbar, and the second battery module comprises a second busbar and a plurality of second battery cells connected to one side of the second busbar, wherein the first busbar is arranged facing the second busbar; as well as A protective member is located between the first current busbar and the second current busbar.

2. The battery according to claim 1, characterized in that The first busbar is provided with a first surface and a second surface in opposite relation, the second busbar is provided with a third surface and a fourth surface in opposite relation, the first surface is arranged facing the third surface, the second surface is used for connecting a plurality of the first battery cells, the fourth surface is used for connecting a plurality of the second battery cells, and the protective member covers the first surface and / or the third surface.

3. The battery according to claim 2, characterized in that The first busbar has a first side surface between the first surface and the second surface, the second busbar has a second side surface between the third surface and the fourth surface, and the protective member covers the first side surface and / or the second side surface.

4. The battery according to claim 3, characterized in that The protective member covers a portion of the second surface, and / or the protective member covers a portion of the fourth surface.

5. The battery according to claim 4, characterized in that A plurality of first busbars are arranged at intervals on the second surface, the first busbars being used to electrically connect the first battery cells, and a portion of the protective member located on the second surface fills a gap between two adjacent first busbars; And / or, a plurality of second busbars are arranged at intervals on the fourth surface, the second busbars are used to conductively connect the second battery cells, and a portion of the protective member located on the fourth surface fills the interval between two adjacent second busbars.

6. The battery according to any one of claims 1 to 5, characterized in that: The first battery cell has a first side and a second side, the first busbar is located on the first side of the plurality of first battery cells, and the second side is provided with a first pressure relief mechanism; and / or the second battery cell has a third side and a fourth side, the first busbar is located on the third side of the plurality of first battery cells, and the fourth side is provided with a second pressure relief mechanism.

7. The battery according to claim 6, characterized in that The first side and the second side are opposite sides or adjacent sides, and / or the third side and the fourth side are opposite sides or adjacent sides.

8. The battery according to claim 6, characterized in that At least one third pressure relief mechanism is provided on the box body.

9. The battery according to claim 8, characterized in that There are multiple third pressure relief mechanisms, and the multiple third pressure relief mechanisms are arranged around the first battery module and the second battery module.

10. The battery according to any one of claims 1 to 5, characterized in that: The protective member is an insulating member.

11. The battery according to any one of claims 1 to 5, characterized in that: The melting point of the protective member is greater than or equal to 200°C.

12. The battery according to any one of claims 1 to 5, characterized in that: Along a first direction, a distance between the first current collector and the second current collector is greater than or equal to 5 mm. The first direction is an arrangement direction of the first battery module to the second battery module.

13. An electrical device, characterized in that: The battery according to any one of claims 1 to 12 is used to provide electrical energy.

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