Battery device and electric equipment

Abstract

The invention discloses a battery device and electric equipment, a battery column is provided with a plurality of battery monomers arranged along a first direction, and at least one surface of each battery monomer is provided with an electrode terminal; the end plate is arranged at at least one end of the battery column in the first direction; the insulating cover comprises a body part and a first cover part, the body part is arranged between the end plate and the adjacent battery monomer, one end of the first cover part is connected with the body part, and the other end of the first cover part extends away from the body part along the first direction and at least covers the surface of the end plate on the same side as the electrode terminal. Therefore, the body part is arranged between the end plate and the adjacent single battery, and the insulating cover at least can cover the surfaces, on the same side, of the end plate and the electrode terminal, so that the influence of attachments on the insulating cover on insulating protection is reduced, the probability of insulation failure of the battery module in the using process and the testing process is reduced, and the service life of the battery module is prolonged. The test stability is improved, and the potential safety hazard in the use process is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical appliance. Background Technology

[0002] In related technologies, to ensure the structural strength of the battery module, end plates are required at the ends. These end plates are typically conductors, and insulation is needed between them and the individual battery cells. However, when a battery cell experiences thermal runaway, electrolyte can adhere to the vicinity of the end plate, leading to insulation failure and even causing the casing to become electrified, posing a safety hazard.

[0003] Furthermore, during the testing of the battery module, the situation of coupling high-temperature electrolyte after the test was not taken into account. After the test, the electrolyte condenses and is adsorbed near the end plate, which will also lead to insufficient creepage distance between the end plate, the output electrode base and the bar plate set on the output electrode, resulting in insulation failure of the battery module after the test. Summary of the Invention

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, one objective of this application is to provide a battery device that offers enhanced safety and improved testing stability.

[0005] This application also proposes an electrical device employing the aforementioned battery device.

[0006] In a first aspect, this application proposes a battery device, comprising: a battery array, an end plate, and an insulating cover. The battery array has a plurality of battery cells arranged along a first direction, and at least one surface of the battery cells is provided with an electrode terminal. The end plate is disposed at at least one end of the battery array in the first direction. The insulating cover includes a body portion and a first cover portion. The body portion is disposed between the end plate and an adjacent battery cell. One end of the first cover portion is connected to the body portion, and the other end of the first cover portion extends away from the body portion along the first direction and at least covers the surface of the end plate and the electrode terminal located on the same side.

[0007] According to the battery device of the present application embodiment, the insulating cover includes a body portion and a first cover portion. On the one hand, the body portion is disposed between the end plate and the adjacent battery cell. On the other hand, by providing the first cover portion on the insulating cover, the insulating cover can at least cover the surface of the end plate and the electrode terminals located on the same side, so as to reduce the impact of the deposits on the insulating cover on the insulation protection, reduce the probability of insulation failure of the battery module during use and testing, improve test stability, and reduce safety hazards during use.

[0008] According to some embodiments of this application, the end plate includes an end plate end face and two end plate sides. The end plate end face is the surface on the same side as the end plate and the electrode terminal. The two end plate sides are respectively connected to the opposite ends of the end plate end face along a second direction and intersect with the end plate end face. The first cover covers at least the end plate end face and the two end plate sides, wherein the second direction intersects with the first direction.

[0009] In the above technical solution, the end face and side face of the end plate can be covered by the first cover to improve the insulation effect of the battery device.

[0010] According to some embodiments of this application, the dimension of the first cover in the first direction is greater than or equal to the dimension of the end plate in the first direction.

[0011] In the above technical solution, the first cover has a better coverage effect on the end plate in the first direction, which can reduce the probability of attachments appearing on the surface of the end plate and make the barrier effect between the attachments appearing on the first cover and the end plate located in the first undefined accommodating space better, so as to improve the insulation protection performance, increase the creepage distance, and reduce the probability of insulation failure.

[0012] According to some embodiments of this application, the battery device further includes an output electrode base, an end plate is provided with a mounting groove, the output electrode base is disposed in the mounting groove, and a first cover is provided with a clearance window for clearing the mounting groove.

[0013] In the above technical solution, the output electrode base is disposed within the mounting groove.

[0014] The clearance window is used to avoid the output terminal base, which can reduce the assembly difficulty of the output terminal base.

[0015] According to some embodiments of this application, the insulating cover further includes a recessed portion disposed within a mounting groove, and the output electrode base is mounted on the recessed portion.

[0016] In the above technical solution, installing the output electrode base inside the recessed part can not only improve the installation stability and reliability of the output electrode base, but also increase the creepage distance between the output electrode base and the end plate, and improve the insulation effect of the insulating cover.

[0017] According to some embodiments of this application, the recessed portion is connected to the first cover portion.

[0018] In the above technical solution, the output electrode base is installed in the recessed part to separate the output electrode base from the end plate, which can further increase the creepage distance between the end plate and the output electrode base, and between the end plate and the output electrode bar, so as to further improve the insulation stability and reliability. In addition, the recessed part is connected to the first cover part, which can reduce the processing difficulty and improve the assembly efficiency.

[0019] According to some embodiments of this application, the insulating cover further includes a second cover portion, one end of which is connected to the body portion, and the other end of which extends away from the first cover portion along a first direction and at least covers the surface of the battery cell adjacent to the end plate that has electrode terminals.

[0020] In the above technical solution, by setting a second cover, the first cover and the second cover respectively cover the battery cell and the end plate. On the one hand, the structural strength of the insulating cover can be improved, and the fixing stability and reliability of the insulating cover between the end plate and the battery cell can be improved. On the other hand, the creepage distance between the end plate and the battery cell can be larger, and the insulation effect of the insulating cover on the end plate can be higher, and the insulation stability can be higher.

[0021] According to some embodiments of this application, a battery cell includes a cell end face and two cell side faces. The cell end face is provided with electrode terminals. The two cell side faces are respectively connected to opposite ends of the cell end face along a second direction and intersect with the cell end face. A second cover covers at least the cell end face and two cell side faces of the battery cell adjacent to the end cover, wherein the second direction intersects with the first direction.

[0022] In the above technical solution, at least the bottom side and the side facing the battery cell in the first direction are open, which can facilitate the disassembly and assembly of the battery cell and the insulating cover, reduce the assembly difficulty of the battery module, and improve the assembly efficiency.

[0023] According to some embodiments of this application, the distance between the electrode terminal of the battery cell and the edge of the battery cell in the first direction is L1, and the dimension of the second side plate in the first direction is L2, satisfying L1≥L2.

[0024] In the above technical solution, the dimensions of the second side plate in the first direction can be more reasonable. Under the premise of covering and insulating the battery cell, the second side plate can avoid obstructing the electrode terminals or the pressure relief valve of the battery cell, so as to facilitate the electrical connection between the battery cell and the surrounding battery cells and ensure that the pressure relief valve can release pressure stably and reliably, thereby further improving the safety and reliability of the battery module.

[0025] According to some embodiments of this application, the material of the insulating cover includes any one of polyethylene, polypropylene, and polyethylene terephthalate.

[0026] In the above technical solution, while meeting the insulation performance requirements of the insulating cover and improving the insulation isolation effect between the battery cell and the end plate, the cost of the insulating cover can be reduced, the processing difficulty of the insulating cover can be reduced, and the applicability of the insulating cover can be improved.

[0027] According to some embodiments of this application, two end plates and two insulating covers are provided respectively. The two end plates are respectively provided at both ends of the battery column along the first direction, and an insulating cover is provided between each end plate and the adjacent battery cell.

[0028] In the above technical solution, an insulating cover is provided at each end of the battery pack in the first direction. An end plate is further provided on the side of the insulating cover away from the battery pack in the first direction, so as to achieve insulation protection between the end plate and the battery cell through the insulating cover. In addition, insulation protection is achieved at both ends of the battery pack in the first direction, which can further improve the insulation protection effect.

[0029] Secondly, this application proposes an electrical device, including the battery described in the above embodiments.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of an electrical device according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of a battery device according to an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of a battery device according to the first embodiment of this application;

[0035] Figure 4 This is a schematic diagram of an insulating cover according to the first embodiment of this application;

[0036] Figure 5 This is a partial cross-sectional view of a battery device according to the first embodiment of this application;

[0037] Figure 6 yes Figure 5 The center circle shows a magnified view of a portion of area A;

[0038] Figure 7 This is a schematic diagram of a battery device according to the second embodiment of this application;

[0039] Figure 8 This is a schematic diagram of an insulating cover according to the second embodiment of this application;

[0040] Figure 9 This is a partial cross-sectional view of a battery device according to a second embodiment of this application;

[0041] Figure 10 yes Figure 9 The middle circle shows a magnified view of a portion of region B.

[0042] Figure label:

[0043] Battery array 10, battery cell 11, electrode terminal 111, cell end face 1101, cell side face 1102.

[0044] End plate 20, mounting groove 21, end plate end face 201, end plate side face 202.

[0045] Insulating cover 30, main body 31, first cover 32, first side plate 321, clearance window 322, recessed part 323, second cover 33, second side plate 331.

[0046] Output terminal base 40,

[0047] Battery assembly 200, housing 300, electrical equipment 400, controller 500, motor 600.

[0048] First direction X, second direction Y. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0051] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0054] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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 orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0055] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0056] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0057] In this application, "multiple" means two or more (including two).

[0058] A single battery cell can be a rechargeable battery. A rechargeable battery is a battery cell that can be recharged after it has been discharged, allowing the active materials to be activated and the cell to continue to be used.

[0059] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0060] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which may form a battery array, and the multiple battery cells may be connected in series, parallel, or in a mixed configuration via a busbar.

[0061] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells, such as forming a battery array.

[0062] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0063] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0064] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0065] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0066] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0067] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0068] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0069] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical equipment using battery devices.

[0070] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0071] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0072] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. A battery device 200 is installed inside the vehicle, and the battery device 200 may be located at the bottom, front, or rear of the vehicle. The battery device 200 can be used to power the vehicle; for example, the battery device 200 can serve as the vehicle's operating power source.

[0073] The vehicle may also include a controller 500 and a motor 600. The controller 500 controls the battery device 200 to supply power to the motor 600, which serves as a load, for example, to meet the power requirements of the vehicle during starting, navigation, and driving.

[0074] In some embodiments of this application, the battery device 200 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0075] Please refer to Figure 2 , Figure 2 This is an exploded view of a battery device 200 provided in some embodiments of this application. The battery device 200 includes a housing 300 for housing individual battery cells 11.

[0076] The housing 300 is a component that houses the individual battery cells 11. The housing 300 provides space for multiple battery cells 11 and can adopt various structures. In some embodiments, the housing 300 may include a tray and a cover, which overlap to define a space for accommodating the battery cells 11. The tray and cover can be of various shapes, such as cuboids, cylinders, etc. The tray can be a hollow structure open on one side, and the cover can also be a hollow structure open on one side, with the open side of the cover overlapping the open side of the tray, thus forming a housing 300 with a space for placement. Alternatively, the tray can be a hollow structure open on one side, and the cover can be a plate-like structure, overlapping the open side of the tray, thus forming a housing 300 with a space for placement. As an example, the battery cell 11 can be a cylindrical battery cell 11, a prismatic battery cell 11, or a battery cell 11 of other shapes; this application does not impose any particular limitations.

[0077] In the battery device 200, there can be one or more battery cells 11. If there are multiple battery cells 11, they can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 11 are connected in both series and parallel. Alternatively, multiple battery cells 11 can be first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed manner to form a whole, which is then housed within the housing 300. Another option is that all battery cells 11 can be directly connected in series, parallel, or in a mixed manner, and then the whole consisting of all battery cells 11 is housed within the housing 300.

[0078] The battery cell 11 serves as the smallest energy unit of the battery device 200. The battery device 200 includes multiple battery cells 11, each of which includes a housing, an end cap, and an electrode assembly disposed within the housing.

[0079] The housing may include a base plate and side plates. The side plates surround the periphery of the base plate and define an accommodating space with an installation opening. Electrode assemblies and other functional components can be installed in the accommodating space. The end cap is closed on the installation opening of the housing to isolate the internal environment of the battery cell 11 from the external environment. The shape of the end cap is adapted to the shape of the housing. The end cap can be supported by a material with a certain hardness and strength (such as aluminum alloy or carbon fiber plate). The end cap can effectively protect the safety and reliability of the internal components of the housing during compression and collision.

[0080] In some embodiments, the end cap may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold. The end cap can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating member may also be provided on the inner side of the end cap. The insulating member can be used to isolate the electrical connection components within the housing from the end cap to reduce the risk of short circuits. For example, the insulating member may be made of plastic, rubber, etc.

[0081] The housing is a component used to mate with the end cap to form the internal environment of the battery cell 11, wherein the formed internal environment can accommodate electrode components, electrolyte, and other components. The housing and end cap can be independent components, and a mounting opening can be provided on the housing. The end cap closes the opening at the mounting opening to form the internal environment of the battery cell 11. The housing can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing can be determined according to the specific shape and size of the electrode components. The housing can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this.

[0082] The electrode assembly is the component in the battery cell 11 where the electrochemical reaction occurs. The casing may contain one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 200, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0083] In related technologies, the battery device 200 includes battery cells 11 arranged in a row and end plates 20 located at both ends of a row of battery cells 11. The battery cells 11 located at both ends are defined as end battery cells (i.e., battery cells 11 adjacent to the end plates 20). An insulating structure is provided between the end plates 20 and the end battery cells. At least part of the insulating structure covers the end battery cells, and the insulating structure can achieve insulation protection for the end plates 20.

[0084] However, when the battery cell 11 experiences thermal runaway, the electrolyte tends to adhere to the vicinity of the insulation structure, which can easily lead to conductivity between the output electrode and the end plate 20, resulting in the casing 300 becoming energized and posing a safety hazard. Furthermore, during the testing of the battery device 200, the existing insulation structure does not take into account the situation of high-temperature electrolyte coupling after the test. That is, the electrolyte during the test will condense and adhere to the insulation structure after the test is completed, resulting in insufficient creepage distance between the end plate 20, the output electrode base 40 and the output electrode, leading to insulation failure of the battery device after the test.

[0085] Based on this, this application proposes a battery device 200. By setting the first cover portion 32 on the insulating cover 30, the insulating cover 30 can cover the end plate 20 to achieve insulation protection between the end plate 20 and the battery cell 11. Under normal use conditions, the electrolyte adhering to the insulating cover 30 during thermal runaway reduces the probability of conduction between the end plate 20 and the output electrode bar, thereby reducing safety hazards and improving safety. During the testing process, especially after the high-temperature electrolyte coupling test, the electrolyte condensed and adhering to the insulating cover 30 can also be separated from the end plate 20, so that the creepage distance between the end plate 20, the output electrode base 40 and the output electrode bar meets the safety requirements. This can reduce the probability of insulation failure of the battery device 200 after testing and improve the test stability and reliability.

[0086] The following is for reference. Figures 1-10 This application describes a battery device 200 and an electrical appliance 400 according to embodiments thereof.

[0087] like Figure 3 and Figure 7 As shown, this application proposes a battery device 200, including: a battery array 10, an end plate 20, and an insulating cover 30.

[0088] The battery array 10 has a plurality of battery cells 11 arranged along a first direction X, and an end plate 20 is disposed at at least one end of the battery array 10 in the first direction X. The insulating cover 30 includes a body portion 31 and a first cover portion 32, with the battery cells 11 adjacent to the end plate 20 between the body portion 31 and the end plate 20. One end of the first cover portion 32 is connected to the body portion 31, and the other end of the first cover portion 32 extends away from the body portion 31 and at least covers the surface of the end plate 20 and the electrode terminal 111 located on the same side.

[0089] It is understood that at least one surface of the battery cell 11 is provided with an electrode terminal, and the first cover 32 at least covers the end plate 20 and the surface on the same side as the electrode terminal, meaning that the battery cell 11 is provided with an electrode terminal 111, and the electrode terminal 111 can be located on one or more surfaces of the battery cell 11, such as the side surface or end face of the battery cell 11.

[0090] For example, the first cover 32 may include a plurality of first side plates 321, and the first side plates 321 are at least disposed on the surface of the end plate 20 corresponding to the electrode terminal 111. For example, if a certain side of a battery cell 11 has an electrode terminal 111, then at least the end plate 20 is provided with a first side plate 321 on the surface of the side of the corresponding cell.

[0091] Of course, the first side plate 321 can also cover the surface of the end plate 20 and the electrode terminal 111 located on the same side as the adjacent side.

[0092] Specifically, the battery array 10 may include multiple battery cells 11, which may be connected in series, parallel, or a combination thereof to meet the required output voltage and power requirements. End plates 20 may be provided at both ends of the battery array 10 to improve the structural strength and stability of the battery device 200. Furthermore, to achieve insulation between the battery cells 11 and the end plates 20, an insulating cover 30 may be provided between the battery cells 11 and the end plates 20, separating the battery cells 11 from the end plates 20. The insulating cover 30 may be located at one end of the battery array 10 in the first direction X, preferably at both ends of the battery array 10 in the first direction X.

[0093] This application provides an insulating cover 30, which includes a main body 31 and a first cover 32. The first cover 32 can cover the surface of the end plate 20 and the electrode terminal 111 located on the same side, thereby achieving insulation protection between the end plate 20 and the battery cell 11, ensuring that the insulation effect of the insulating cover 30 remains stable, reducing the impact of adhering substances on the insulation effect of the insulating cover 30, reducing the probability of insulation failure after thermal runaway, which would cause the battery device 200 housing 300 to become charged, reducing the safety hazards of the battery device 200, reducing the probability of insulation failure of the battery device 200 after testing, and improving test stability.

[0094] Among them, such as Figure 4 , Figure 5 and Figure 6 As shown, according to some embodiments of this application, the insulating cover 30 includes: a body portion 31, which is located between the end plate 20 and the adjacent battery cell 11; one end of the first cover portion 32 is connected to the body portion 31; and the other end of the first cover portion 32 extends away from the body portion 31 along a first direction X and covers the surface of the end plate 20 and the electrode terminal 111 located on the same side.

[0095] The first cover 32 can cover the entire outer peripheral surface of the end plate 20, or cover a portion of the outer peripheral surface of the end plate 20. When the first cover 32 covers the entire outer peripheral surface of the end plate 20, the first cover 32 can define an outer frame. The outer frame is connected to the body part 31 on one side in the first direction X, and the other side of the outer frame in the first direction X is open, so that the end plate 20 can be inserted into the first cover 32, reducing the assembly difficulty between the first cover 32 and the end plate 20, and ensuring the covering effect of the first cover 31, thereby improving insulation stability and reliability.

[0096] Understandably, in combination Figure 4 , Figure 5 , Figure 6 as well as Figure 8 , Figure 9 and Figure 10 As shown, the first cover 32 covers at least one surface of the end plate 20, and the first cover 32 and the end plate 20 can be connected by a structure such as structural adhesive. Any adhering substances that may be generated on the outer surface of the insulating cover 30 can be spaced apart from the end plate 20 covering the inside of the first cover 32, and the adhering substances will not adhere to the inner surface of the first cover 32, so as to improve the protective effect.

[0097] It should be noted that, in the test scenario where the battery device 200 is coupled with the electrolyte, the setting of the first cover 32 can increase the creepage distance from the output electrode to the end plate 20, reduce the impact of electrolyte corrosion, adhesion, condensation, etc. on the insulation effect of the insulating cover 30 after the test, and ensure that the insulation cover 30 can meet the requirement that the insulation resistance between the total positive and negative electrodes of the battery device 200 and the housing 300 is greater than 1000Ω / V after the test, so as to ensure the insulation stability of the battery device 200 after the test and reduce the probability of insulation failure after the test.

[0098] According to the battery device 200 of this application embodiment, the insulating cover 30 includes a body portion 31 and a first cover portion 32. On the one hand, the body portion 31 is disposed between the end plate 20 and the adjacent battery cell 11. On the other hand, by providing the first cover portion 32 on the insulating cover 30, the insulating cover 30 can at least cover the surface of the end plate 20 and the electrode terminal 111 located on the same side, so as to reduce the impact of the deposits on the insulating cover 30 on the insulation protection, reduce the probability of insulation failure of the battery device 200 during use and testing, improve test stability, and reduce safety hazards during use.

[0099] According to some embodiments of this application, the end plate 20 includes an end plate end face 201 and two end plate side faces 202. The end plate end face 201 is the surface of the end plate 20 and the electrode terminal 111 located on the same side. The two end plate side faces 202 are respectively connected to the opposite ends of the end plate end face 201 along the second direction Y and intersect with the end plate end face 201. The first cover portion 32 at least covers the end plate end face 201 and the two end plate side faces 202, wherein the second direction Y intersects with the first direction.

[0100] Specifically, the first cover 32 may include a plurality of first side plates 321. One end of the first side plate 321 is connected to the main body 31. The plurality of first side plates 321 are arranged sequentially around the end plate 20 in the circumferential direction, and two adjacent first side plates 321 are connected. That is, one first side plate 321 is opposite to the end face 201 of the end plate, and two first side plates 321 are located on both sides of the first side plate 321 opposite to the end face 201 of the end plate in the second direction Y, and are respectively opposite to the corresponding side face 202 of the end plate.

[0101] Of course, the end plate 20 also has an end plate bottom surface, and a first side plate 321 can be set corresponding to the end plate bottom surface.

[0102] Therefore, the first cover 32 can cover the end plate side 202 and end plate end face 201 of the end plate 20, thereby improving the insulation effect of the battery device 200.

[0103] For example, such as Figure 4 , Figure 5 and Figure 6 As shown, the end plate 20 has a cuboid structure. The electrode terminal 111 is located on the end face of the battery cell 11 located above it. The multiple first side plates 321 may include a first top plate and first side plates located on both sides of the first top plate along the second direction Y. The second direction Y is perpendicular to the first direction X. For example, the first direction X is the length direction and the second direction Y is the width direction. The first top plate, the two first side plates and the body part 31 enclose an accommodating space. The end plate 20 can be set in this accommodating space. The first top plate and the two first side plates are respectively attached to the end plate 20. The bottom side of the accommodating space and the side away from the end battery cell in the first direction X are open to facilitate the disassembly and assembly of the end plate 20, reduce the assembly difficulty of the battery device 200, improve the assembly efficiency, and at the same time reduce the number of first side plates 321 to reduce the material usage of the insulating cover 30 and reduce material costs.

[0104] For example,

[0105] Structural adhesive can be applied to the first side plate 321 and the end plate 20 can be fixed by the structural adhesive. Alternatively, the first side plate 321 can be provided with a plug-in groove or plug-in protrusion, and the end plate 20 can be provided with a plug-in protrusion or plug-in groove to realize the plug-in connection between the end plate 20 and the first cover 32.

[0106] Combination Figure 5 and Figure 9 As shown, according to some embodiments of this application, the dimension of the first cover portion 32 in the first direction X is greater than or equal to the dimension of the end plate 20 in the first direction X.

[0107] For example, the first cover 32 has a dimension of 18 mm in the first direction X, and the end plate 20 has a dimension of 15 mm in the first direction X, or the first side plate 321 has a dimension of 20 mm in the first direction X, and the end plate 20 has a dimension of 20 mm in the first direction X.

[0108] In this way, the first cover 32 has a better coverage effect on the end plate 20 in the first direction X, which can reduce the probability of deposits appearing on the surface of the end plate 20, and make the barrier effect between the deposits appearing on the first cover 32 and the end plate 20 located in the accommodating space defined by the first cover 32 better, so as to improve the insulation protection performance, increase the creepage distance, and reduce the probability of insulation failure.

[0109] Combination Figures 3 to 6 As shown, according to some embodiments of this application, the battery device 200 further includes an output electrode base 40, an end plate 20 is provided with a mounting groove 21, the output electrode base 40 is disposed in the mounting groove 21, and a first cover 32 is provided with a clearance window 322 for clearance of the mounting groove 21.

[0110] The mounting groove 21 is formed on the end face 201 of the end plate. The output electrode base 40 is used to install the output electrode bar. The output electrode base 40 can be constructed as a plastic part and is set in the mounting groove 21. The clearance window 322 is used to avoid the output electrode base 40, which can reduce the assembly difficulty of the output electrode base 40. The output electrode base 40 is exposed outside the first side plate 321 through the mounting groove 21. The output electrode bar can be installed on the output electrode base 40 through the mounting groove 21, which can also reduce the assembly difficulty between the output electrode bar and the output electrode base 40.

[0111] The output electrode base 40 can protrude from the first side plate 321 through the mounting groove 21. The output electrode bar is installed on the part of the output electrode base 40 that protrudes from the first side plate 321, further reducing the assembly difficulty between the output electrode bar and the output electrode base 40.

[0112] like Figures 7 to 10 As shown, according to some other embodiments of this application, the insulating cover 30 may also include a recessed portion 323, which is disposed in the mounting groove 21, and the output electrode base 40 is mounted in the recessed portion 323.

[0113] Therefore, installing the output electrode base 40 inside the recessed part 323 can not only improve the installation stability and reliability of the output electrode base 40, but also increase the creepage distance of the output electrode bar from the output electrode base 40 to the end plate 20, and improve the insulation effect of the insulating cover 30.

[0114] A recessed portion 323 may be further provided on the first cover portion 32. The recessed portion 323 may include a base plate and multiple side plates connected to the first side plate 321. The base plate and the side plates enclose an installation space, and the recessed portion 323 is set in the installation groove 21. The installation space of the recessed portion 323 is used to install the output electrode base 40, so that the output electrode base 40 is separated from the end plate 20. This can further increase the creepage distance of the output electrode bar from the output electrode base 40 to the end plate 20, thereby further improving the insulation stability and reliability. The recessed portion 323 and the first cover portion 31 can be integrally formed, which can reduce the processing difficulty and improve the assembly efficiency.

[0115] It should be pointed out that, as Figures 3 to 6 As shown, in the first embodiment, the insulating cover 30 may consist only of the body portion 31 and the first cover portion 32, and the first cover portion 32 may cover at least one surface of the end plate 20, such as... Figures 7 to 10 As shown, in the second embodiment, the insulating cover 30 may include a first cover portion 32 and a second cover portion 33 located on both sides of the body portion 31 in the first direction X. The first cover portion 32 covers at least one surface of the end plate 20, and the second cover portion 33 covers at least one surface of the battery cell 11.

[0116] Specifically, such as Figures 7 to 10 As shown, the insulating cover 30 also includes a second cover portion 33. One end of the second cover portion 33 is connected to the main body portion 31, and the other end of the second cover portion 33 extends away from the main body portion 31 along the first direction X, and at least covers the surface of the battery cell 11 adjacent to the end plate 20 that is provided with electrode terminals 111.

[0117] In this way, by setting the second cover 33, the first cover 32 and the second cover 33 respectively cover the surface of the battery cell 11 with the electrode terminal 111 and the same side surface of the end plate 20. On the one hand, the structural strength of the insulating cover 30 can be improved, and the fixing stability and reliability of the insulating cover 30 between the end plate 20 and the battery cell 11 can be improved. On the other hand, the creepage distance between the end plate 20 and the battery cell 11 can be larger, and the insulation effect of the insulating cover 30 on the end plate 20 can be higher, and the insulation stability can be higher.

[0118] According to some embodiments of this application, the battery cell 11 includes a cell end face 1101 and two cell side faces 1102. The cell end face 1101 is provided with electrode terminals 111. The two cell side faces 1102 are respectively connected to the opposite ends of the cell end face 1101 along the second direction Y and intersect with the cell end face 1101. The second cover portion 33 at least covers the cell end face 1101 and the two cell side faces 1102 of the battery cell 11 adjacent to the end plate 20, wherein the second direction Y intersects with the first direction.

[0119] Specifically, the second cover 33 may include a plurality of second side plates 331, which are connected to the main body 31. The plurality of second side plates 331 are arranged sequentially around the circumference of the battery cell 11, and adjacent second side plates 331 are connected. That is, one second side plate 331 is opposite to the end face 1011 of the cell, and two second side plates 331 are located on both sides of the second side plate 331 opposite to the end face 1011 of the cell in the second direction Y, and are respectively opposite to the corresponding side face 1012 of the cell. The plurality of second side plates 331 may include a second top plate and second side plates located on both sides of the second top plate along the second direction Y. The second top plate, the two second side plates, and the main body 31 enclose an accommodating space, in which at least a portion of the end battery cell can be disposed. At least the bottom side and the side of the accommodating space facing the end battery cell in the first direction X are open to facilitate the assembly and disassembly of the battery cell 11 and the insulating cover 30, reduce the assembly difficulty of the battery device 200, and improve the assembly efficiency.

[0120] Of course, the battery cell 11 also has a bottom surface, and a second side plate 331 can be provided corresponding to the bottom surface of the cell, that is, the second cover 33 covers the entire outer side surface of the battery cell 11.

[0121] like Figure 10 As shown, according to some embodiments of this application, the distance between the electrode terminal of the battery cell 11 and the edge of the battery cell 11 in the first direction X is L1, the size of the second cover 33 in the first direction X is L2, that is, the size of the second side plate 331 in the first direction X is L2, and L1 is greater than or equal to L2.

[0122] For example: the length of L1 is 15mm, and the length of L2 is 15mm or 12mm, etc.

[0123] In this way, the dimensions of the second side plate 331 in the first direction X can be more reasonable. Under the premise of covering and insulating the battery cell 11, the second side plate 331 can avoid obstructing the electrode terminals or the pressure relief mechanism of the battery cell 11, so as to facilitate the electrical connection between the battery cell 11 and the surrounding battery cells 11 and ensure that the pressure relief valve can relieve pressure stably and reliably, thereby further improving the safety and reliability of the battery device 200.

[0124] According to some embodiments of this application, the insulating cover 30 is made of any one of polyethylene (PE), polypropylene (PP), or polyethylene terephthalate (PET).

[0125] In this way, while meeting the insulation performance requirements of the insulating cover 30 and improving the insulation isolation effect between the battery cell 11 and the end plate 20, the cost of the insulating cover 30 can be reduced, the processing difficulty of the insulating cover 30 can be reduced, and the applicability of the insulating cover 30 can be improved.

[0126] Of course, the material of the insulating cover 30 in this application embodiment is not limited to this. In other embodiments, the insulating cover 30 may also include polytetrafluoroethylene (PTFE) material parts, polyvinylidene fluoride (PVDF) material parts, polyether ether ketone (PEEK) material parts, polyimide (PI) material parts, and polyether sulfone (PES) material parts.

[0127] It should be noted that the insulating cover 30 in this embodiment can be constructed from the aforementioned materials, such as polytetrafluoroethylene (PTFE), which has extremely strong chemical and heat resistance and is inert to almost all chemicals; polyvinylidene fluoride (PVDF), which has excellent chemical stability and high-temperature resistance; polyetheretherketone (PEEK), a high-performance engineering plastic with excellent heat resistance, chemical resistance, and mechanical properties, suitable for applications requiring high strength and stability; polyimide, which also has excellent thermal stability and chemical inertness; or polyethersulfone, which has good thermal stability and chemical resistance and can maintain its physical properties in high-temperature and corrosive environments.

[0128] In other words, the insulating cover 30 in this embodiment can be made of the above-mentioned materials, which not only have good electrical insulation properties, but also exhibit strong chemical stability, especially in resisting electrolyte corrosion, so as to improve the insulation effect of the battery device 200, reduce safety hazards, and improve test stability.

[0129] It should be noted that the insulating cover 30 of the first embodiment of this application may include a first cover portion 32, and the first cover portion 32 is provided with an avoidance window 322 or a recessed portion 323. The insulating cover 30 of the second embodiment of this application may include a first cover portion 32 and a second cover portion 33, and the first cover portion 32 is provided with an avoidance window 322 or a recessed portion 323.

[0130] It should be noted that there are two end plates 20 and two insulating covers 30 respectively. The two end plates 20 are respectively located at both ends of the battery column 10 along the first direction X, and an insulating cover 30 is provided between each end plate 20 and the adjacent battery cell 11.

[0131] In other words, an insulating cover 30 is provided at both ends of the battery pack 10 in the first direction X. An end plate 20 is further provided on the side of the insulating cover 30 away from the battery pack 11 in the first direction X, so as to achieve insulation protection between the end plate 20 and the battery cell 11 through the insulating cover 30. Furthermore, the battery pack 10 achieves insulation protection at both ends in the first direction X, which can further improve the insulation protection effect.

[0132] like Figure 1 As shown, this application proposes an electrical device 400, including: the battery device 200 in the above embodiment.

[0133] Other configurations and operations of the battery device 200 and the electrical device 400 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0134] Hereinafter, with reference to the accompanying drawings, a specific embodiment will be used to exemplarily describe the power supply device 400 and the battery device 200 of this application.

[0135] See Figure 1 In this embodiment of the application, the electrical device 400 can be a vehicle, and the battery device 200 is formed as a battery pack and used to supply power to the vehicle's motor, such as... Figure 2 As shown, the battery device 200 may have multiple battery rows 10 inside, and each battery row 10 has multiple battery cells 11 arranged along the first direction X, and further see Figure 3 As shown, the battery array 10 has end plates 20 at both ends in the first direction. An insulating cover 30 can be provided between the end plate 20 and the adjacent battery cell 11. See also... Figure 4 As shown, in some embodiments, the insulating cover 30 may include a body portion 31 and a first cover portion 32 located on the side of the body portion 31 away from the battery cell 11. The first cover portion 32 is used to cover the end plate end face 201 and the two end plate side faces 202 of the end plate 20, such as... Figure 8 As shown, in some other embodiments, the insulating cover 30 may include a body portion 31 and a first cover portion 32 and a second cover portion 33 located on both sides of the body portion 31. The first cover portion 32 is used to cover the end plate end face 201 and the two end plate side faces 202 of the end plate 20. The second cover portion 33 is used to cover the single cell end face 1011 and the two single cell side faces 1012 of the battery cell 11, and the second cover portion 33 is spaced apart from the electrode terminal 111.

[0136] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0137] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: A battery array (10) having a plurality of battery cells (11) arranged along a first direction, wherein at least one surface of each battery cell (11) is provided with an electrode terminal (111). End plate (20), said end plate (20) being disposed at at least one end of the battery array (10) in the first direction; An insulating cover (30) includes a body portion (31) and a first cover portion (32). The body portion (31) is disposed between the end plate (20) and the adjacent battery cell (11). One end of the first cover portion (32) is connected to the body portion (31), and the other end of the first cover portion (32) extends away from the body portion (31) along the first direction and at least covers the surface of the end plate (20) and the electrode terminal (111) located on the same side.

2. The battery device according to claim 1, characterized in that, The end plate (20) includes an end plate end face (201) and two end plate side faces (202). The end plate end face (201) is the surface of the end plate (20) and the electrode terminal (111) located on the same side. The two end plate side faces (202) are respectively connected to the opposite ends of the end plate end face (201) along the second direction and intersect with the end plate end face (201). The first cover (32) at least covers the end plate end face (201) and the two end plate side faces (202), wherein the second direction intersects with the first direction.

3. The battery device according to claim 1, characterized in that, The dimension of the first cover (32) in the first direction is greater than or equal to the dimension of the end plate (20) in the first direction.

4. The battery device according to claim 1, characterized in that, The battery device further includes an output electrode base (40), and the end plate (20) is provided with a mounting groove (21). The output electrode base (40) is disposed in the mounting groove (21). The first cover (32) is provided with a clearance window (322), which is used to avoid the output electrode base (40).

5. The battery device according to claim 4, characterized in that, The insulating cover (30) also includes a recessed portion (323), which is disposed in the mounting groove (21), and the output electrode base (40) is mounted on the recessed portion (323).

6. The battery device according to claim 5, characterized in that, The recessed portion (323) is connected to the first cover portion (32).

7. The battery device according to claim 1, characterized in that, The insulating cover (30) further includes a second cover (33), one end of which is connected to the body part (31), and the other end of which extends away from the first cover (32) along the first direction and at least covers the surface of the battery cell (11) adjacent to the end plate (20) where the electrode terminal (111) is located.

8. The battery device according to claim 7, characterized in that, The battery cell (11) includes a cell end face (1101) and two cell side faces (1102). The cell end face (1101) is provided with the electrode terminal (111). The two cell side faces (1102) are respectively connected to the opposite ends of the cell end face (1101) along the second direction and intersect with the cell end face (1101). The second cover (33) covers at least the cell end face (1101) and the two cell side faces (1102) of the battery cell (11) adjacent to the end plate (20), wherein the second direction intersects with the first direction.

9. The battery device according to claim 7, characterized in that, The distance between the electrode terminal of the battery cell (11) and the edge of the battery cell (11) in the first direction is L1, and the size of the second cover (33) in the first direction is L2, satisfying: L1≥L2.

10. The battery device according to any one of claims 1-9, characterized in that, Two end plates (20) and two insulating covers (30) are provided respectively. The two end plates (20) are respectively provided at both ends of the battery array (10) along the first direction, and an insulating cover (30) is provided between each end plate (20) and the adjacent battery cell (11).

11. The battery device according to any one of claims 1-9, characterized in that, The insulating cover (30) is made of any one of polyethylene, polypropylene, or polyethylene terephthalate.

12. An electrical appliance, characterized in that, include: The battery as described in any one of claims 1 to 11.

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