Battery devices and electrical equipment

Abstract

The present application relates to a battery device and an electrical equipment, wherein a limiter is provided on at least one side of a battery cell assembly along a second direction, and the limiter is convexly provided on a mounting surface and extends along a first direction, and when the battery cell assembly is pressed down and bonded to the mounting surface, the limiter can prevent at least part of the glue from overflowing, interrupting the continuous glue path formed in the second direction. In this way, when thermal runaway occurs, the continuity of the released electrolyte covering the overflowed glue surface is interrupted, reducing the probability of the electrolyte forming a continuous conductive path on the overflowed glue, thereby reducing the probability of insulation failure between the battery cell and the box body during thermal runaway, which is conducive to improving the reliability of the battery device.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Art

[0002] During the assembly process of the battery device, in order to effectively fix the battery module, glue is usually applied to the bottom of the box, and then the battery module is pressed down into the box. However, due to the limitations of the traditional structural design, the glue overflows from the sides of the battery module when the battery module is pressed down, and connects with each other to form a continuous glue path, which makes the insulation between the battery module and the box easily fail during thermal runaway, reducing the reliability of the battery device. Utility Model Content

[0003] Based on this, it is necessary to provide a battery device and electrical equipment to reduce the probability of insulation failure between the battery cell and the box during thermal runaway and improve the reliability of the battery device.

[0004] In a first aspect, the present application provides a battery device, comprising: a box body, the bottom of which comprises a mounting surface; a battery cell assembly, bonded to the mounting surface, the battery cell assembly comprising a plurality of battery cells distributed in sequence along a first direction; wherein the battery device further comprises a limit member, the limit member being located on at least one side of the battery cell assembly along a second direction, the limit member being protruding from the mounting surface and extending along the first direction, the first direction intersecting with the second direction.

[0005] In the above-mentioned battery device, a stopper is provided on at least one side of the battery cell assembly along the second direction, and the stopper is convexly provided on the mounting surface and extends along the first direction. When the battery cell assembly is pressed down and bonded to the mounting surface, the stopper can prevent at least part of the glue from overflowing, interrupting the continuous glue path formed in the second direction. In this way, when thermal runaway occurs, the continuity of the released electrolyte covering the overflowed glue surface is interrupted, reducing the probability of the electrolyte forming a continuous conductive path on the overflowed glue, thereby reducing the probability of insulation failure between the battery cell and the box body during thermal runaway, which is conducive to improving the reliability of the battery device.

[0006] In some embodiments, the battery device further includes two abutment beams, which are respectively located on both sides of the battery cell assembly along the first direction and extend along the second direction, and the limiter is connected between the two abutment beams. With such a design, the introduction of the abutment beams can not only resist the expansion of the battery cell assembly and reduce the expansion deformation of the battery cell assembly, but also limit the overflow of glue in the first direction. In addition, the limiter is connected between the two abutment beams to form a closed structure on one side of the battery cell assembly along the second direction, further improving the limiting effect of the overflow of glue in the second direction.

[0007] In some embodiments, the battery device further comprises a first insulating member, which is disposed on a side of each abutting beam facing the limiting member and is used to abut against the battery cell assembly, and the limiting member is connected to the first insulating member. In this design, the first insulating member is disposed on the abutting beam, and the second insulating member is used to abut against the battery cell assembly, so that effective abutment is achieved while also achieving insulation between the battery cell assembly and the abutting beam, thereby improving the insulation inside the battery device.

[0008] In some embodiments, both ends of the first insulating member along the second direction include a first end, and both ends of the stopper along the second direction include a second end, and each first end extends beyond the corresponding second end along the second direction. With such a design, both ends of the first insulating member along the second direction extend beyond the stopper, so that the battery can be insulated and abutted against the abutment beam when it expands, which is beneficial to improving the reliability of the battery device.

[0009] In some embodiments, the dimension of each first end beyond the corresponding second end is recorded as D, where D≥20 mm. With this design, the dimension of the first end beyond the second end is controlled to be more than 20 mm, so that the first insulating member can better abut against the battery cell assembly to achieve effective insulation protection.

[0010] In some embodiments, the battery device further includes a second insulating member, which is disposed on a surface of each abutting beam that faces away from the mounting surface. In this design, the second insulating member is introduced to provide insulation protection for the top surface of the abutting beam, which is beneficial to improving the insulation effect inside the battery device, thereby improving the reliability of the battery device.

[0011] In some embodiments, a side of the second insulating member facing the stopper is connected to a side of the first insulating member away from the mounting surface. In this design, one side of the second insulating member is connected to one side of the first insulating member to partially cover the abutting beam, further improving the insulation protection of the abutting beam, thereby facilitating the reliability of the battery device.

[0012] In some embodiments, the stopper includes a first component and a second component distributed along a first direction, and the height of the second component protruding from the mounting surface is higher than the height of the first component protruding from the mounting surface. With such a design, the first component and the second component with a height difference introduced in the stopper can effectively destroy the continuity of the adhesion of the electrolyte released during thermal runaway, effectively reduce the probability of insulation failure between the battery cell and the box during thermal runaway, and improve the reliability of the battery device.

[0013] In some embodiments, the maximum height difference between the second component and the first component is recorded as h, where 10 mm ≤ h ≤ 50 mm. With such a design, the height difference between the second component and the first component can be controlled between 10 mm and 50 mm, which can better destroy the continuity of the electrolyte released during thermal runaway while effectively taking into account the utilization of the internal space of the box.

[0014] In some embodiments, the first component and the second component each include a plurality of components, and the first component and the second component are alternately arranged along the first direction and connected to each other. With such a design, the first component and the second component are alternately arranged in sequence along the first direction, so that the continuity of the electrolyte adhesion is worse, thereby effectively reducing the probability of insulation failure caused by internal glue overflow when the battery device is thermally runaway.

[0015] In some embodiments, the second component includes two support portions, the two support portions are spaced apart on the mounting surface along the first direction; the two support portions are inclined along the side facing each other, and the ends away from the mounting surface are connected to each other; and / or the ends of the two support portions away from the mounting surface are connected by a connecting portion. In this design, the second component is designed as an inclined and mutually connected support portion; or two support portions and a connecting portion, so that the second component is higher than the first component, and a concave-convex structure is formed on the surface of the limiter, which is conducive to better destroying the continuity of the electrolyte adhesion.

[0016] In some embodiments, the battery cell assembly includes a plurality of battery cell assemblies, all of which are spaced apart along the second direction, and each battery cell assembly has a stopper on one side along the second direction. In this design, a stopper is provided on one side of each battery cell assembly to achieve effective glue blocking, so that the continuity of electrolyte adhesion is effectively destroyed during thermal runaway, thereby effectively reducing the probability of insulation failure caused by glue overflow during thermal runaway of the battery device.

[0017] In a second aspect, the present application provides an electrical device, which includes the above battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application.

[0019] Figure 2 An exploded view of a battery device provided in accordance with some embodiments of the present application.

[0020] Figure 3 An internal structure diagram of a battery device provided in some embodiments of the present application.

[0021] Figure 4 for Figure 3 The structural diagram of the coordination of the limiting member, the first insulating member and the second insulating member is shown in FIG.

[0022] Figure 5 A structural diagram of the coordination of a limit member, a first insulating member, and a second insulating member provided in some other embodiments of the present application.

[0023] Figure 6 for Figure 5 The structure shown in the figure is coordinated with the structural diagram of the battery cell assembly.

[0024] Figure 7 A structural diagram of the coordination of a limit member, a first insulating member, and a second insulating member provided in some other embodiments of the present application.

[0025] Figure 8 for Figure 7 The structure shown in the figure is coordinated with the structural diagram of the battery cell assembly.

[0026] Fig. 9 A structural diagram of the interior of a battery device provided for some other embodiments of the present application.

[0027] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery cell; 20, housing; 21, first part; 22, second part; 23, mounting surface; 30, battery cell assembly; 40, stopper; 41, second end; 42, first component; 43, second component; 431, support portion; 432, connecting portion; 50, first insulating member; 51, first end; 60, second insulating member; 70, abutting beam; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0032] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0034] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0035] In the preparation of battery devices, in order to effectively fix the battery module, glue is usually applied to the bottom of the box, and then the battery module is pressed down into the box. However, during the pressing process, the glue can easily overflow from between the battery module and the box, forming a continuous glue path in the box. When the battery device experiences thermal runaway, the released electrolyte will cover the surface of the overflowed glue and form a continuous conductive path, resulting in a reduction in the creepage distance between the battery cell assembly and the box, thereby causing the insulation between the battery module and the box to fail, reducing the reliability of the battery device.

[0036] Based on this, in order to solve the problem of easy insulation failure due to glue overflow in traditional battery devices during thermal runaway, the present application provides a battery device, in which a limiter is provided on at least one side of the battery cell assembly along the second direction, and the limiter is convexly provided on the mounting surface and extends along the first direction. When the battery cell assembly is pressed down and bonded to the mounting surface, the limiter can prevent at least part of the glue from overflowing, interrupting the formation of a continuous glue path in the second direction. In this way, when thermal runaway occurs, the continuity of the released electrolyte covering the glue overflow surface is interrupted, reducing the probability of the electrolyte forming a continuous conductive path on the glue overflow, thereby reducing the probability of insulation failure between the battery cell and the box body during thermal runaway, which is conducive to improving the reliability of the battery device.

[0037] Among them, the battery cell assembly refers to a combination structure composed of several battery cells connected in series, parallel or mixed, which can be in the form of a battery module or a non-battery module, that is, there is no end plate, strap or other structure on its side.

[0038] The battery cells disclosed in the embodiments of the present application can be used, but not limited to, in electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery cells, battery devices, etc. disclosed in the present application.

[0039] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0040] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0041] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0042] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0043] Please refer to Figure 2 , Figure 2 An exploded view of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 20 and a battery cell 10, and the battery cell 10 is contained in the box body 20. Among them, the box body 20 is used to provide a storage space for the battery cell 10, and the box body 20 can adopt a variety of structures. In some embodiments, the box body 20 may include a first part 21 and a second part 22, and the first part 21 and the second part 22 cover each other, and the first part 21 and the second part 22 jointly define a storage space for accommodating the battery cell 10. The second part 22 may be a hollow structure with one end open, and the first part 21 may be a plate-like structure, and the first part 21 covers the open side of the second part 22, so that the first part 21 and the second part 22 jointly define a storage space; the first part 21 and the second part 22 may also be hollow structures with one side open, and the open side of the first part 21 covers the open side of the second part 22. Of course, the box body 20 formed by the first part 21 and the second part 22 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0044] In the battery device 100, there may be multiple battery cells 10, and the multiple battery cells 10 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 10 are both connected in series and in parallel. The multiple battery cells 10 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 10 is accommodated in the box 20; of course, the battery device 100 may also be a battery module formed by connecting multiple battery cells 10 in series, in parallel, or in a mixed connection, and then the multiple battery device 100 modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 20. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 10.

[0045] Each battery cell 10 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 10 may be cylindrical, flat, rectangular, or in other shapes.

[0046] According to some embodiments of this application, please refer to Figure 3 The present application provides a battery device 100, which includes: a box body 20, a battery cell assembly 30 and a stopper 40. The bottom of the box body 20 includes a mounting surface 23; the battery cell assembly 30 is bonded to the mounting surface 23, and the battery cell assembly 30 includes a plurality of battery cells 10 distributed in sequence along a first direction X. The battery device 100 also includes a stopper 40, which is located on at least one side of the battery cell assembly 30 along a second direction Y. The stopper 40 is convexly disposed on the mounting surface 23 and extends along the first direction X, and the first direction X intersects with the second direction Y.

[0047] The box body 20 refers to the shell structure outside the battery device 100, which may include a first part 21 and a second part 22, and a space for accommodating the battery cell assembly 30 may be formed between the first part 21 and the second part 22. At this time, the mounting surface 23 is provided on a surface of the second part 22 facing the first part 21, and the battery cell assembly 30 is bonded to the mounting surface 23 of the second part 22 by glue.

[0048] The battery cell assembly 30 includes a plurality of battery cells 10 distributed in sequence along the first direction X, which may be in the form of a battery module or a structure consisting of a plurality of battery cells 10. In the battery cell assembly 30, there are many ways to arrange the battery cells 10. For example, taking a square battery as an example, the battery cells 10 are arranged in a manner that their respective large surfaces are bonded to each other, wherein the large surface refers to the surface with the largest area of ​​the battery cell 10. When installing the battery cell assembly 30, glue may be applied to the bottom of the battery cell assembly 30 or to the mounting surface 23; of course, glue may also be applied to the bottom and mounting surface 23 of the battery cell assembly 30 respectively.

[0049] The stopper 40 refers to a structure located on one side of the battery cell assembly 30 along the second direction Y, which extends along the first direction X and can limit the glue between the battery cell assembly 30 and the mounting surface 23 from overflowing in the second direction Y. Due to the existence of the stopper 40, the glue cannot form a continuous glue path in the second direction Y. In this way, when thermal runaway occurs, the electrolyte covering the overflowed glue cannot form an effective conductive path, so that effective insulation is maintained between the battery cell assembly 30 and the box 20. The extension length of the stopper 40 in the first direction X can be determined according to actual needs, for example: the length of the stopper 40 in the first direction X is greater than or equal to the length of the battery cell assembly 30 in the first direction X. Of course, in some embodiments, the length of the stopper 40 in the first direction X can also be slightly less than the length of the battery cell assembly 30 in the first direction X. The stopper 40 is protruded from the mounting surface 23, and its protruding height can also be determined according to actual needs, as long as it can effectively block the overflowed glue.

[0050] At the same time, the stopper 40 is located on one side of the battery cell assembly 30 along the second direction Y, and it can keep a gap with the battery cell assembly 30; it can also abut against the battery cell assembly 30, so that not only the battery is stably fixed on the mounting surface 23; but also the structure in the box body 20 is more compact. Among them, there are many ways to fix the stopper 40 on the mounting surface 23, such as: it can be but not limited to clamping, riveting, welding, bonding, pinning, etc., or it can be an integrated structure, such as: the stopper 40 is integrally formed on the mounting surface 23 by 3D printing, injection molding, die casting, etc. At the same time, the first direction X and the second direction Y can be understood as directions that intersect with the height direction of the box body 20, and the three directions are different. In some embodiments, the first direction X, the second direction Y and the height direction of the box body 20 are perpendicular to each other.

[0051] In this way, when thermal runaway occurs, the continuity of the released electrolyte covering the surface of the overflowed glue is interrupted, reducing the probability of the electrolyte forming a continuous conductive path on the overflowed glue, thereby reducing the probability of insulation failure between the battery cell 10 and the box body 20 during thermal runaway, which is beneficial to improving the reliability of the battery device 100.

[0052] According to some embodiments of the present application, optionally, please refer to Figure 3 The battery device 100 further includes two abutting beams 70 , which are respectively located on both sides of the battery cell assembly 30 along the first direction X and extend along the second direction Y. The limiting member 40 is connected between the two abutting beams 70 .

[0053] The abutment beam 70 refers to a structure located on one side of the battery cell assembly 30 along the first direction X, which can maintain an abutment state with the battery cell assembly 30, or have a gap between the battery cell assembly 30. When the battery cell assembly 30 expands during cyclic charge and discharge, the abutment beam 70 can abut on the battery cell assembly 30, provide an abutment force for the expansion of the battery cell assembly 30, and reduce the expansion deformation of the battery cell assembly 30.

[0054] The limiting member 40 can be directly connected between the abutting beams 70 or indirectly connected, for example, one end of the limiting member 40 is connected to the abutting beam 70 through an intermediate structure. When the limiting member 40 is connected between two abutting beams 70, a closed structure can be formed on one side of the battery cell assembly 30 along the second direction Y, effectively preventing the glue from overflowing along the second direction Y; at the same time, the abutting beams 70 on both sides can also play a role in limiting the overflow of glue in the first direction X.

[0055] In this design, the introduction of the abutment beam 70 can not only resist the expansion of the battery cell assembly 30 and reduce the expansion deformation of the battery cell assembly 30, but also limit the overflow of glue in the first direction X. In addition, the limiter 40 is connected between the two abutment beams 70 to form a closed structure on one side of the battery cell assembly 30 along the second direction Y, further improving the limiting effect of the overflow of glue in the second direction Y.

[0056] According to some embodiments of the present application, optionally, please refer to Figure 3 and Figure 4 The battery device 100 further includes a first insulating member 50 , which is disposed on a side of each abutting beam 70 facing the limiting member 40 and is used to abut against the battery cell assembly 30 . The limiting member 40 is connected to the first insulating member 50 .

[0057] The first insulating member 50 refers to a structure with an insulating function, and its material may be, but is not limited to, plastic, rubber, etc. The first insulating member 50 is disposed on a side of each abutting beam 70 facing the limiter 40, and its purpose is to facilitate the battery cell assembly 30 to abut on the first insulating member 50 when it expands, instead of directly abutting on the abutting beam 70, and to achieve insulation between the battery cell assembly 30 and the abutting beam 70 while achieving effective abutment. At the same time, the size of the first insulating member 50 along the second direction Y can be designed in a variety of ways, such as: the size of the first insulating member 50 along the second direction Y is equal to the size of the abutting beam 70 along the second direction Y; or the size of the first insulating member 50 along the second direction Y is smaller than the size of the abutting beam 70 along the second direction Y, etc.

[0058] The stopper 40 is connected to the first insulating member 50 to achieve indirect connection with the abutting beam 70. There are many ways to connect the stopper 40 and the first insulating member 50, such as but not limited to welding, clamping, bonding, etc. Of course, the stopper 40 and the first insulating member 50 can also be designed as an integrated structure.

[0059] With such a design, the first insulating member 50 is disposed on the abutting beam 70 , and the second insulating member 60 is used to abut against the battery cell assembly 30 . While achieving effective abutment, insulation between the battery cell assembly 30 and the abutting beam 70 is also achieved, thereby improving the insulation inside the battery device 100 .

[0060] According to some embodiments of the present application, optionally, please refer to Figure 4 Both ends of the first insulating member 50 along the second direction Y include a first end 51 , and both ends of the limiting member 40 along the second direction Y include a second end 41 , and each first end 51 along the second direction Y extends beyond the corresponding second end 41 .

[0061] Each first end 51 extends beyond the corresponding second end 41 along the second direction Y, indicating that the dimension of the first insulating member 50 along the second direction Y is greater than the dimension of the stopper 40 along the second direction Y, so that both ends of the first insulating member 50 extend beyond the stopper 40. The portion of the first insulating member 50 extending beyond the stopper 40 can better abut against the battery cell assembly 30, so that the battery cell assembly 30 can abut against the abutment beam 70 in an insulated manner when expansion occurs.

[0062] With such a design, both ends of the first insulating member 50 along the second direction Y extend out of the stopper 40 , so that the battery can be insulated and abutted against the abutting beam 70 when expanding, which is beneficial to improving the reliability of the battery device 100 .

[0063] According to some embodiments of the present application, optionally, please refer to Figure 4 The dimension of each first end 51 beyond the corresponding second end 41 is recorded as D, where D≥20mm.

[0064] The dimension D of the first end 51 beyond the second end 41 may be greater than 20 mm, for example, but not limited to, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, etc.

[0065] With such a design, the dimension of the first end 51 beyond the second end 41 is controlled to be more than 20 mm, so that the first insulating member 50 can better abut against the battery cell assembly 30 to achieve effective insulation protection.

[0066] According to some embodiments of the present application, optionally, please refer to Figure 3 The battery device 100 further includes a second insulating member 60 , which is disposed on a surface of each abutting beam 70 facing away from the mounting surface 23 .

[0067] The second insulating member 60 is a structure with an insulating function, which can provide insulating protection for the top surface of the abutting beam 70. The size of the second insulating member 60 along the second direction Y can be designed in a variety of ways, for example: the size of the second insulating member 60 along the second direction Y is equal to the size of the abutting beam 70 along the second direction Y; or the size of the second insulating member 60 along the second direction Y is smaller than the size of the abutting beam 70 along the second direction Y, etc.

[0068] With such a design, the second insulating member 60 is introduced to provide insulation protection for the top surface of the abutting beam 70 , which is beneficial to improving the insulation effect inside the battery device 100 , thereby improving the reliability of the battery device 100 .

[0069] According to some embodiments of the present application, optionally, please refer to Figure 3 The side of the second insulating member 60 facing the limiting member 40 is connected to the side of the first insulating member 50 away from the mounting surface 23 .

[0070] One side of the second insulating member 60 is connected to one side of the first insulating member 50, which means that the second insulating member 60 extends from the top surface of the abutting beam 70 to the side surface of the abutting beam 70 and is connected to the first insulating member 50, thereby partially covering the abutting beam 70. The connection between the second insulating member 60 and the first insulating member 50 may be, but is not limited to, bonding, clamping, etc.; of course, the two may also be an integrated structure.

[0071] With such a design, one side of the second insulating member 60 is connected to one side of the first insulating member 50 to partially cover the abutting beam 70 , further improving the insulation protection of the abutting beam 70 , thereby facilitating improving the reliability of the battery device 100 .

[0072] According to some embodiments of the present application, optionally, please refer to Figures 5 to 8The limiting member 40 includes a first component 42 and a second component 43 distributed along the first direction X. The height of the second component 43 protruding from the mounting surface 23 is higher than the height of the first component 42 protruding from the mounting surface 23.

[0073] The height of the second component 43 protruding from the mounting surface 23 is higher than the height of the first component 42 protruding from the mounting surface 23, indicating that the surface of the stopper 40 facing away from the mounting surface 23 has at least two height differences, so that when thermal runaway occurs, the first component 42 and the second component 43 with the height difference are more likely to destroy the continuity of the electrolyte adhesion. Both the first component 42 and the second component 43 can be attached to the mounting surface 23, that is, there is no gap between the first component 42 and the second component 43 and the mounting surface 23; of course, there can also be a gap between the first component 42 and the second component 43 and the mounting surface 23. Specifically in some embodiments, the first component 42 is attached to the mounting surface 23, and there is a gap between the second component 43 and the mounting surface 23.

[0074] The number of the first component 42 and the second component 43 can be one or more. When there are more than one first component 42 and more than one second component 43, the first component 42 and the second component 43 can be alternately distributed in sequence along the first direction X, and more than two first components 42 can be arranged between two adjacent second components 43.

[0075] With such a design, the first component 42 and the second component 43 with a height difference introduced in the limiter 40 can effectively destroy the continuity of the adhesion of the electrolyte released during thermal runaway, effectively reduce the probability of insulation failure between the battery cell 10 and the box body 20 during thermal runaway, and improve the reliability of the battery device 100.

[0076] According to some embodiments of the present application, optionally, please refer to Figure 5 The maximum height difference between the second component 43 and the first component 42 is recorded as h, where 10mm≤h≤50mm.

[0077] The height difference between the second component 43 and the first component 42 can be controlled between 10 mm and 50 mm, which can better destroy the continuity of the electrolyte released during thermal runaway while effectively taking into account the use of the internal space of the box 20. The maximum height of the first component 42 protruding from the mounting surface 23 can be designed to be greater than or equal to 5 mm to achieve an effective adhesive blocking effect; at the same time, the maximum height of the first component 42 protruding from the mounting surface 23 should not be greater than the height of the abutting beam 70.

[0078] With such a design, the height difference between the second component 43 and the first component 42 can be controlled within a range of 10 mm to 50 mm, which can better destroy the continuity of the adhesion of the electrolyte released during thermal runaway while effectively taking into account the utilization of the internal space of the housing 20 .

[0079] According to some embodiments of the present application, optionally, please refer to Figure 5 The first component 42 and the second component 43 each include a plurality of components, and the first components 42 and the second components 43 are alternately distributed along the first direction X and connected to each other.

[0080] The first components 42 and the second components 43 are alternately distributed along the first direction X, indicating that a surface of the stopper 40 facing away from the mounting surface 23 is designed with one high and one low concave-convex in the first direction X. Specifically, in some embodiments, the first component 42 and the second component 43 are an integrated structure, for example, the stopper 40 is designed into a plurality of first components 42 and second components 43 connected to each other through bending, stamping and other processes.

[0081] With such a design, the first components 42 and the second components 43 are alternately arranged in sequence along the first direction X, so that the continuity of the electrolyte adhesion is worse, thereby effectively reducing the probability of insulation failure caused by glue overflow when the battery device 100 thermally runs away.

[0082] According to some embodiments of the present application, the second component 43 may include two support portions 431, and the two support portions 431 are spaced apart on the mounting surface 23 along the first direction X; Figure 5 and Figure 6 , the two support portions 431 are inclined along the side facing each other, and the ends away from the mounting surface 23 are connected to each other; and / or, please refer to Figure 7 and Figure 8 The two supporting portions 431 are connected at their ends away from the mounting surface 23 by a connecting portion 432 .

[0083] The two support portions 431 are inclined toward each other and connected to each other to form a triangular structure. When the two support portions 431 are connected by the connecting portion 432, the second component 43 can present a square or trapezoidal structure. At this time, each support portion 431 can be arranged perpendicular to the mounting surface 23, and at the same time, a gap is maintained between the connecting portion 432 and the mounting surface 23, and the connecting portion 432 can be parallel to the mounting surface 23.

[0084] In this design, the second component 43 is designed as an inclined and interconnected support portion 431; or two support portions 431 and a connecting portion 432, so that the second component 43 is higher than the first component 42, and a concave-convex structure is formed on the surface of the limiter 40, which is conducive to better destroying the continuity of the electrolyte adhesion.

[0085] According to some embodiments of the present application, optionally, please refer to Fig. 9 The battery cell assembly 30 includes a plurality of battery cell assemblies 30 , all of which are spaced apart along the second direction Y, and each of the battery cell assemblies 30 has a limiting member 40 on one side along the second direction Y.

[0086] When the battery cell assemblies 30 are spaced apart along the second direction Y, a stopper 40 may be provided between two adjacent battery cell assemblies 30; a stopper 40 may also be provided between the battery cell assemblies 30 and the inner wall of the box body 20. Meanwhile, in some embodiments, both ends of each stopper 40 are provided with a first insulating member 50 and a second insulating member 60.

[0087] With such a design, a limiter 40 is provided on one side of each battery cell assembly 30 to achieve effective glue resistance, so that the continuity of electrolyte adhesion is effectively destroyed during thermal runaway, thereby effectively reducing the probability of insulation failure due to glue overflow during thermal runaway of the battery device 100.

[0088] According to some embodiments of the present application, the present application provides an electric device, and the electric device includes the above battery device 100.

[0089] According to some embodiments of this application, please refer to Figures 3 to 9 The present application provides a battery device 100, which includes a box 20, a battery cell assembly 30, a stopper 40, an abutting beam 70, a first insulating member 50 and a second insulating member 60. The battery cell assembly 30 is bonded to the bottom of the box 20, and the two abutting beams 70 are located at both ends of the battery cell assembly 30 along the first direction X, and are both arranged on the mounting surface 23. The first insulating member 50 is arranged on a side of the abutting beam 70 facing the battery cell assembly 30, and the second insulating member 60 is arranged on a surface of the abutting beam 70 facing away from the mounting surface 23. The stopper 40 is located on at least one side of the battery cell assembly 30 along the second direction Y, and is connected between the two first insulating members 50, wherein the first direction X is perpendicular to the second direction Y. In addition, a surface of the stopper 40 facing away from the mounting surface 23 can be designed as a concave-convex structure. With such a design, the probability of insulation failure caused by glue overflow during thermal runaway of the battery device 100 is reduced; at the same time, the insulation protection inside the battery device 100 is also enhanced.

[0090] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: The battery device comprises: A box body (20), the bottom of which includes a mounting surface (23); A battery cell assembly (30) is bonded to the mounting surface (23), wherein the battery cell assembly (30) comprises a plurality of battery cells (10) distributed in sequence along a first direction (X); The battery device further comprises a limiter (40), the limiter (40) being located on at least one side of the battery cell assembly (30) along the second direction (Y), the limiter (40) being protruding from the mounting surface (23) and extending along the first direction (X), the first direction (X) intersecting with the second direction (Y).

2. The battery device according to claim 1, characterized in that: The battery device further comprises two abutment beams (70), the two abutment beams (70) being respectively located on both sides of the battery cell assembly (30) along the first direction (X) and extending along the second direction (Y), and the limiting member (40) being connected between the two abutment beams (70).

3. The battery device according to claim 2, characterized in that: The battery device further comprises a first insulating member (50), which is arranged on a side of each abutting beam (70) facing the limiting member (40) and is used for abutting and cooperating with the battery cell assembly (30), and the limiting member (40) is connected to the first insulating member (50).

4. The battery device according to claim 3, characterized in that: Both ends of the first insulating member (50) along the second direction (Y) include a first end (51), and both ends of the limiting member (40) along the second direction (Y) include a second end (41), and each first end (51) extends beyond the corresponding second end (41) along the second direction (Y).

5. The battery device according to claim 4, characterized in that: The dimension of each first end (51) beyond the corresponding second end (41) is denoted as D, where D≥20 mm.

6. The battery device according to claim 3, characterized in that: The battery device further comprises a second insulating member (60), wherein the second insulating member (60) is disposed on a surface of each of the abutting beams (70) which faces away from the mounting surface (23).

7. The battery device according to claim 6, characterized in that: A side of the second insulating member (60) facing the limiting member (40) is connected to a side of the first insulating member (50) away from the mounting surface (23).

8. The battery device according to any one of claims 1 to 7, characterized in that: The limiting component (40) comprises a first component (42) and a second component (43) distributed along the first direction (X), wherein the height of the second component (43) protruding from the mounting surface (23) is higher than the height of the first component (42) protruding from the mounting surface (23).

9. The battery device according to claim 8, characterized in that: The maximum height difference between the second component (43) and the first component (42) is denoted as h, where 10 mm ≤ h ≤ 50 mm.

10. The battery device according to claim 8, characterized in that: The first component (42) and the second component (43) each include a plurality of components, and the first components (42) and the second components (43) are alternately distributed along the first direction (X) and are connected to each other.

11. The battery device according to claim 8, characterized in that: The second component (43) comprises two supporting portions (431), and the two supporting portions (431) are arranged on the mounting surface (23) at intervals along the first direction (X); The two support portions (431) are inclined along a side facing each other, and the ends away from the mounting surface (23) are connected to each other; and / or the ends of the two support portions (431) away from the mounting surface (23) are connected via a connecting portion (432).

12. The battery device according to any one of claims 1 to 7, characterized in that: The battery cell assemblies (30) include a plurality of battery cell assemblies (30), all of which are spaced apart along the second direction (Y), and each of the battery cell assemblies (30) has the limiting component (40) on one side along the second direction (Y).

13. An electrical equipment, characterized in that: The electrical equipment comprises the battery device according to any one of claims 1-12.

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