Box body, battery and electric equipment

Abstract

The embodiment of the invention relates to the technical field of battery structures, and provides a box body, a battery and electric equipment, the box body comprises a box body and a separator, the box body is provided with a through hole, the separator is arranged on the box body, and the separator blocks the through hole; the separator is configured to be capable of being melted through in the case of thermal runaway of the battery cells; according to the embodiment of the invention, the through hole is formed in the box body, and the partition piece is arranged on the box body to block the through hole, so that the partition piece can block the through hole under the condition of normal work, the interior and exterior of the box body are not communicated, and impurities such as metal particles outside the box body cannot enter the box body through the through hole; therefore, the probability of insulation failure caused by the fact that metal particles outside the box body enter the box body can be reduced; the separator can be melted through by heat generated by thermal runaway, so that the through hole is opened, heat in the box body can be discharged in time, and the hidden danger of combustion or explosion caused by heat accumulation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of battery structures, and in particular to a box, a battery and an electrical device. Background Art

[0002] The battery casing usually has through holes so that in the event of thermal runaway of the battery cells inside the casing, the high-temperature smoke generated by the thermal runaway can be discharged to the outside of the casing through the through holes, thereby avoiding the risk of combustion or explosion caused by heat accumulation in the casing.

[0003] However, when adopting the technical solution of opening a through hole in the box, external foreign particles may enter the box through the through hole. For example, metal particles outside the bottom plate of the box or on the bottom guard plate enter the box through the through hole, which may cause the insulation protection inside the box to fail. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a box, a battery and an electrical device, aiming to solve the problem in the related art that opening a through hole on the bottom plate of the box to deal with thermal runaway may cause external metal particles to enter the box and cause insulation failure.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0006] In the first aspect, an embodiment of the present application provides a box for accommodating a battery cell, the box comprising a box body and a partition, a through hole is opened on the box body, the partition is arranged on the box body, and the partition blocks the through hole; the partition is configured to be able to be melted through in the event of thermal runaway of the battery cell.

[0007] Beneficial effects of the embodiments of the present application: The box body provided by the embodiments of the present application has a through hole opened on the box body and a partition is arranged on the box body to seal the through hole. Under normal working conditions, the partition can seal the through hole so that the inside and outside of the box body are not connected, and impurities such as metal particles outside the box body cannot enter the box body through the through hole, thereby reducing the probability of insulation failure caused by metal particles outside the box body entering the box body; at the same time, in the event of thermal runaway of the battery cells in the box body, the partition can be melted through by the heat generated by the thermal runaway, so that the through hole is opened, and the heat inside the box body can be discharged in time, reducing the risk of combustion or explosion caused by heat accumulation.

[0008] In some embodiments, a portion of the partition is recessed toward the box body to form a recessed portion, and the recessed portion is inserted into the through hole.

[0009] By adopting the above technical solution, when the partition is assembled on the box body, the recessed portion of the partition can be inserted into the through hole, thereby achieving the purpose of positioning and assembly, and effectively improving the assembly efficiency.

[0010] In some embodiments, the box body further includes a first fireproofing component, the recessed portion has a connecting surface arranged opposite to the box body, and the first fireproofing component is arranged on the connecting surface.

[0011] By adopting the above-mentioned technical solution, by arranging the first fireproof component on the connecting surface of the recessed portion, when one of the battery cells in the box body undergoes thermal runaway, the high-temperature smoke generated by the thermal runaway of the battery cell melts through the corresponding recessed portion and is discharged from the corresponding through hole to the outside of the box body. When the discharged high-temperature smoke diffuses outside the box body, it can be blocked by the first fireproof component arranged on the recessed portion inserted in other through holes, thereby reducing the hidden danger of thermal runaway diffusion.

[0012] In some embodiments, the divider is disposed on the inner surface of the box body.

[0013] By adopting the above technical solution, the partition is arranged on the inner surface of the box body, and the partition seals the through hole on the box body on one side inside the box body, so that impurities such as metal particles outside the box body cannot enter the inside of the box body.

[0014] In some embodiments, the separator includes at least one of a paraffin layer, a plastic layer, and a gelatin layer.

[0015] By adopting the above-mentioned technical solution, in the event of thermal runaway of the battery cells in the box body, the heat generated by the thermal runaway of the battery cells can melt through the partition, so that the through hole can connect the inside and outside of the box body, and the heat generated by the thermal runaway of the battery cells can be discharged from the through hole.

[0016] In some embodiments, the box body includes a bottom plate, through holes are opened on the bottom plate, and a separator is arranged on a surface of the bottom plate close to the battery cell; the explosion-proof valve of the battery cell faces the separator.

[0017] By adopting the above-mentioned technical solution, a through hole is opened on the bottom plate of the box body, and a partition is arranged on the surface of the bottom plate close to the battery cell to seal the through hole. The explosion-proof valve of the battery cell in the box body faces the partition. When thermal runaway occurs in the battery cell, the high-temperature flue gas generated by the thermal runaway can be discharged from the explosion-proof valve of the battery cell and contact the partition. The partition can be melted through in time to make the through hole conductive, so that the high-temperature flue gas generated by the thermal runaway of the battery cell can be discharged from the through hole more promptly, thereby reducing the probability of heat accumulation in the box body.

[0018] In some embodiments, a plurality of through holes are provided on the base plate, and at least some of the through holes are arranged at intervals along a first direction of the base plate to form hole groups; one or more groups of hole groups are formed on the base plate; when the number of hole groups is at least two groups, the hole groups are arranged at intervals along a second direction of the base plate, wherein the first direction and the second direction intersect.

[0019] By adopting the above-mentioned technical scheme, the through holes opened on the bottom plate can be arranged along the first direction of the bottom plate to form a hole group, and when there are at least two hole groups, the hole groups can be arranged at intervals along the second direction of the bottom plate, so that when the battery cells are assembled in the box body, multiple battery cells can be arranged along the first direction of the bottom plate, and multiple rows of battery cells can be arranged at intervals along the second direction of the bottom plate, so that the explosion-proof valves of each battery cell can be respectively set corresponding to each through hole to improve the efficiency of dealing with thermal runaway of the battery cell.

[0020] In some embodiments, the number of separators is the same as the number of hole groups, and each separator is configured to block all through holes in the corresponding hole group.

[0021] By adopting the above technical solution, a plurality of separators are used to respectively block the through holes of the corresponding hole groups, thereby reducing the material consumption of the separators to achieve the purpose of reducing costs.

[0022] In some embodiments, the box body also includes a bottom guard plate, which is arranged on the outside of the bottom plate, and an exhaust channel is formed between the bottom guard plate and the bottom plate. The exhaust channel is connected to the outside of the bottom guard plate, and the through hole is connected to the exhaust channel.

[0023] By adopting the above-mentioned technical solution, an exhaust channel is formed between the bottom guard plate and the bottom plate. When a battery cell in the box body experiences thermal runaway, the high-temperature smoke generated by the thermal runaway of the battery cell will melt through the partition blocking the through hole, so that the high-temperature smoke can be discharged from the through hole into the exhaust channel, and then discharged out of the bottom guard plate through the exhaust channel.

[0024] In some embodiments, a second fireproofing component is provided on a surface of the bottom guard plate facing the bottom plate.

[0025] By adopting the above-mentioned technical solution, by arranging a second fireproof component on the side surface of the bottom guard plate facing the bottom plate, when thermal runaway occurs, when the high-temperature smoke is discharged from the box body through the through hole to the exhaust channel, the second fireproof component can protect the bottom guard plate and reduce the probability of the bottom guard plate being damaged by the high-temperature smoke.

[0026] In some embodiments, the partition includes a partition portion and an enclosure portion. The partition portion is disposed on the inner surface of the box body and is at least partially used to block the through hole. The enclosure portion is disposed on a side surface of the partition portion facing the inside of the box body.

[0027] By adopting the above-mentioned technical solution, the partitioning part of the partition can be used to block the through hole, and the enclosure part of the partition can play a blocking role to prevent the colloid from entering the enclosure part when the box body is coated with glue, so as to reduce the probability of the colloid contacting the explosion-proof valve of the battery cell, thereby reducing the probability of failure of the explosion-proof valve.

[0028] In some embodiments, in the thickness direction of the partition, a projection of the enclosure portion is configured to be able to surround a projection of an explosion-proof valve of the battery cell.

[0029] By adopting the above technical solution, the projection of the enclosure portion can surround the projection of the explosion-proof valve of the battery cell, so that the enclosure portion can play a role in enclosing and protecting the explosion-proof valve, further reducing the probability of the colloid contacting the explosion-proof valve of the battery cell, thereby further reducing the probability of failure of the explosion-proof valve.

[0030] In some embodiments, the enclosure portion includes two first enclosure structures disposed opposite to each other and two second enclosure structures disposed opposite to each other, the first enclosure structure and the second enclosure structure are both disposed on the partition portion, and the opposite ends of the first enclosure structure are respectively connected to the two second enclosure structures; the height of the first enclosure structure is less than the height of the second enclosure structure.

[0031] By adopting the above-mentioned technical solution, when the battery cell is assembled into the box body, the battery cell squeezes the enclosure part and is assembled on the box body. Since the first enclosure structure and the second enclosure structure of the enclosure part have a height difference, the reaction force of the first enclosure structure on the battery cell can be reduced, so that the elastic force applied by the enclosure part to the battery cell can be effectively reduced, thereby reducing the probability of the battery cell being bounced.

[0032] In a second aspect, an embodiment of the present application further provides a battery, including a battery cell and a box body as described above, wherein the battery cell is disposed in the box body.

[0033] Beneficial effects of the embodiments of the present application: The battery provided in the embodiments of the present application includes the above-mentioned box body. On the basis that the above-mentioned box body can use partitions to block the through holes to reduce the probability of insulation failure caused by metal particles outside the box body entering the box body, the probability of insulation failure of the battery is also low.

[0034] In some embodiments, there are multiple battery cells, and the multiple battery cells are accommodated in the box body, and the explosion-proof valve of each battery cell faces the corresponding through hole opened on the box body.

[0035] By adopting the above-mentioned technical solution, the explosion-proof valve of each battery cell is oriented toward the corresponding through hole opened on the box body. When any battery cell has thermal runaway, the high-temperature flue gas generated by the thermal runaway of the battery cell can be discharged from the explosion-proof valve to the through hole, so that the partition blocking the through hole is melted through, and the high-temperature flue gas can be discharged from the box body in time.

[0036] In a third aspect, an embodiment of the present application further provides an electrical device, comprising a battery as described above.

[0037] Beneficial effects of the embodiments of the present application: The electrical equipment provided by the embodiments of the present application includes the above-mentioned battery. Based on the low probability of insulation failure of the above-mentioned battery, the leakage probability of the electrical equipment is also lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0040] Figure 2 An exploded view of a battery provided for some embodiments of the present application;

[0041] Figure 3 A schematic diagram of the exploded structure of a battery cell provided in some embodiments of the present application;

[0042] Figure 4 A schematic diagram of a structure in which a battery cell is assembled in a box body provided in some embodiments of the present application;

[0043] Figure 5 A schematic diagram of a specific structure between a box body and a battery cell provided in some embodiments of the present application;

[0044] Figure 6 for Figure 5 A local enlarged schematic diagram of point A;

[0045] Figure 7 A schematic diagram of the structure inside the box body provided in some embodiments of the present application;

[0046] Figure 8 A schematic diagram of the structure of a separator provided in some embodiments of the present application.

[0047] Among them, the reference numerals in the figure are:

[0048] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor;

[0049] 10. Box body; 11. First part; 12. Second part;

[0050] 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Shell; 23. Cell assembly; 23a. Tab; 24. Explosion-proof valve;

[0051] 100, box body; 101, through hole; 102, hole group; 110, bottom plate;

[0052] 200, separator; 210, recessed portion; 211, connecting surface; 220, separator; 230, enclosure portion; 231, first enclosure structure; 232, second enclosure structure;

[0053] 300, first fireproof part;

[0054] 400, bottom guard plate; 410, exhaust passage;

[0055] 500, second fireproofing element;

[0056] D, first direction; H, second direction; M, thickness direction. DETAILED DESCRIPTION

[0057] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0058] In the description of the embodiments of the present application, it needs to be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0059] In addition, the terms "first" and "second" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0060] In the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; 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. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] 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.

[0062] The battery includes a casing and multiple battery cells assembled in the casing. During the use of the battery, the battery cells inside are at risk of thermal runaway. When the battery cells are in thermal runaway, they will discharge high-temperature flue gas carrying a large amount of heat through the explosion-proof valve; the high-temperature flue gas carrying a large amount of heat accumulates in the casing, which will cause the battery to burn or even explode.

[0063] In order to reduce the risk of combustion or explosion caused by heat accumulation in the box, in the related technology, a through hole is opened on the battery box so that the inside and outside of the box are connected through the through hole; even if the battery cell thermal runaway occurs, the high-temperature smoke generated by the thermal runaway of the battery cell can be discharged from the through hole to the outside of the box, thereby reducing the risk of high-temperature smoke accumulation in the box, and further reducing the risk of combustion or explosion of the battery cell. However, when the technical solution of opening a through hole in the box is adopted, external impurity particles may enter the box through the through hole, for example, metal particles outside the bottom plate of the box or on the bottom guard plate enter the box through the through hole, which may cause the insulation protection in the box to fail, and then cause the risk of leakage.

[0064] Based on the above considerations, in order to solve the problem that opening a through hole in the box to deal with thermal runaway may cause external metal particles to enter the box and cause insulation failure, a box is designed. A through hole is opened in the box body of the box, and a partition is set on the box body to seal the through hole, so that external metal particles and other impurities cannot enter the box body through the through hole; at the same time, in the event of thermal runaway, the high-temperature flue gas generated by the thermal runaway can melt through the partition, so that the high-temperature flue gas can be discharged to the outside of the box body through the through hole.

[0065] The box body of the present application can meet the requirements for dealing with thermal runaway. The high-temperature flue gas generated by thermal runaway can melt through the partition and be discharged to the outside of the box body through the through hole. At the same time, in a normal state where thermal runaway does not occur, the partition can block impurities such as metal particles outside the box body from entering the box body, thereby reducing the risk of insulation failure caused by impurities such as metal particles entering the box body, thereby reducing the risk of leakage.

[0066] The box disclosed in the embodiment of the present application can be used for electric devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements. Electric devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0067] 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.

[0068] Please refer to Figure 1 , Figure 1 A 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 1100 is provided inside the vehicle 1000, and the battery 1100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 may be used to power the vehicle 1000, for example, the battery 1100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300, and the controller 1200 is used to control the battery 1100 to power the motor 1300, for example, for starting, navigating and driving the vehicle 1000.

[0069] In some embodiments of the present application, the battery 1100 can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0070] Please refer to Figure 2 , Figure 2An exploded view of a battery 1100 provided in some embodiments of the present application. The battery 1100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, the first part 11 may be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0071] In the battery 1100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 1100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 1100 may also include other structures, for example, the battery 1100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0072] Each battery cell 20 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 20 may be cylindrical, flat, rectangular, or in other shapes.

[0073] Please refer to Figure 3 , Figure 3 The schematic diagram of the exploded structure of the battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, a battery cell assembly 23 and other functional components.

[0074] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect to the battery cell assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold, such as an explosion-proof valve. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0075] The shell 22 is a component used to cooperate with the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover 21 at the opening. Without limitation, the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common assembly surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cover 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0076] The battery cell assembly 23 is a component in the battery cell 1100 where electrochemical reactions occur. One or more battery cell assemblies 23 may be contained in the housing 22. The battery cell assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab 23a connects the electrode terminals to form a current loop.

[0077] Next, the box provided in the embodiment of the present application will be introduced and explained.

[0078] According to some embodiments of this application, please refer to Figure 2 , Figure 4 and Figure 7 The embodiment of the present application provides a box body 10 for accommodating a battery cell 20. The box body 10 includes a box body 100 and a separator 200. The box body 100 is provided with a through hole 101. The separator 200 is arranged on the box body 100 and blocks the through hole 101. The separator 200 is configured to be able to be melted through when a thermal runaway occurs in the battery cell 20.

[0079] Among them, the box body 100 is the main structure of the box body 10, and the box body 100 may include a first part 11 and a second part 12; therefore, the through hole 101 opened on the box body 100, the through hole 101 may be specifically opened on the first part 11, or may also be opened on the second part 12, or the through hole 101 may be opened on both the first part 11 and the second part 12.

[0080] The through hole 101 can penetrate the box body 100 and make the inside and outside of the box body 100 communicate with each other. Specifically, the through hole 101 can be, but is not limited to, a round hole, a waist hole, a rectangular hole, a strip hole, etc.

[0081] The separator 200 is used to block the through hole 101. Specifically, the separator 200 can be fixedly assembled on the box body 100, for example, by gluing, fastening, clamping, etc. The separator 200 can be fixedly assembled on the inner surface of the box body 100, or the separator 200 can also be fixedly assembled on the outer surface of the box body 100; or the separator 200 can also be inserted into the through hole 101 and block the through hole 101; wherein, the inner side of the box body 100 refers to the side of the box body 100 for accommodating the battery cell 20, and the outer side of the box body 100 refers to the other side relative to the inner side.

[0082] The separator 200 may be, but is not limited to, a separator plate, a separator block, a separator column, etc. The number of separators 200 may be one or more; wherein one separator 200 may be used to block only one through hole 101; or one separator 200 may block multiple through holes 101 at the same time.

[0083] The separator 200 can be melted through when the battery cell 20 has thermal runaway, so that the through hole 101 is connected, and the high-temperature flue gas carrying a large amount of heat generated by the thermal runaway of the battery cell 20 can be discharged from the through hole 101 to the outside of the box body 100. Specifically, the separator 200 can be a molten material with a low melting point, such as plastic, paraffin, etc.; or, the separator 200 can also be a combustible material with a low ignition point, such as paper, fiber layer, etc.; the high-temperature flue gas generated by thermal runaway can melt through or burn the separator 200, so that the through hole 101 is connected.

[0084] The box body 10 provided in the embodiment of the present application has a through hole 101 opened on the box body 100, and a partition 200 is arranged on the box body 100 to block the through hole 101. Under normal working conditions, the partition 200 can block the through hole 101 so that the inside and outside of the box body 100 are not connected, and impurities such as metal particles outside the box body 100 cannot enter the box body 100 through the through hole 101, thereby reducing the probability of insulation failure caused by metal particles outside the box body 100 entering the box body 100, thereby reducing the probability of leakage; at the same time, in the case of thermal runaway of the battery cell 20 in the box body 10, the partition 200 can be melted through by the heat generated by the thermal runaway, so that the through hole 101 is opened, and the heat inside the box body 100 can be discharged in time to avoid the hidden danger of heat accumulation and combustion or explosion.

[0085] Please refer to Figures 5 to 7 In some embodiments, a portion of the partition 200 is recessed toward the box body 100 to form a recessed portion 210 , and the recessed portion 210 is inserted into the through hole 101 .

[0086] The recessed portion 210 is formed by a portion of the separator 200 being recessed toward the through hole 101 . The recessed portion 210 is used to be inserted into the through hole 101 so that the separator 200 can be positioned and installed through the plug-in fit between the recessed portion 210 and the through hole 101 .

[0087] Specifically, the recessed portion 210 may be, but is not limited to, a columnar protrusion, a spherical protrusion, a block-shaped protrusion, etc.; or, the outer shape structure of the recessed portion 210 may be adapted to the corresponding through hole 101, wherein the through hole 101 corresponding to the recessed portion 210 refers to the through hole 101 to be inserted into the recessed portion 210, and by setting the outer shape structure of the recessed portion 210 to be adapted to or substantially the same as the corresponding through hole 101, the recessed portion 210 can be more easily inserted into the corresponding through hole 101 for assembly.

[0088] It can be understood that the number of recessed portions 210 formed on the separator 200 can be the same as the number of through holes 101 blocked by the separator 200, or the number of recessed portions 210 can be less than the number of blocked through holes 101. For example, when one of the separators 200 is used to block x through holes 101, a recessed portion 210 can be formed on the separator 200, and the recessed portion 210 is inserted into the corresponding through hole 101 to position and install the separator 200, so that the other part of the separator 200 can block the other x-1 through holes 101, where x can be an integer greater than or equal to 1; or, when one of the separators 200 is used to block y through holes 101, the separator 200 can form a recessed portion 210 greater than one and less than y, and divide the recessed portions 210 into two parts. They are separately inserted into corresponding through holes 101 to realize the positioning and guiding assembly of the separator 200, so that the other parts of the separator 200 can block the through holes 101 without the recessed parts 210 inserted in y through holes 101, wherein y can be an integer greater than 2; or, when one of the separators 200 is used to block z through holes 101, z recessed parts 210 can be formed on the separator 200, and these recessed parts 210 are respectively inserted into corresponding through holes 101 to realize the positioning and guiding assembly of the separator 200, wherein the above-mentioned z can be an integer greater than or equal to 2.

[0089] With such arrangement, when the partition 200 is assembled on the box body 100 , the recessed portion 210 of the partition 200 can be inserted into the corresponding through hole 101 , thereby achieving the purpose of positioning and assembly, and effectively improving the assembly efficiency.

[0090] Please refer to Figures 5 to 7 In some embodiments, the box body 10 further includes a first fireproofing member 300 , the recessed portion 210 has a connecting surface 211 disposed opposite to the box body 100 , and the first fireproofing member 300 is disposed on the connecting surface 211 .

[0091] The first fireproof member 300 is used to reduce the risk of the recessed portion 210 being accidentally melted through due to high-temperature smoke outside the box body 100. The first fireproof member 300 can be a structural member with a fireproof effect, such as a fireproof coating, a fireproof patch, a fireproof adhesive, etc. The first fireproof member 300 can be fixed on the recessed portion 210 by coating, adhesion, etc.

[0092] The connecting surface 211 refers to a side surface of the recessed portion 210 for setting the first fireproofing component 300. It should be understood that the connecting surface 211 is arranged opposite to the box body 100, that is, the connecting surface 211 is a side surface of the recessed portion 210 facing away from the box body 100.

[0093] It can be understood that when the partition 200 is arranged on the inner surface of the box body 100, the recessed portion 210 formed by the portion of the partition 200 being recessed outward from the box body 100 is inserted into the through hole 101, and the first fireproofing member 300 is arranged on the connecting surface 211 of the recessed portion 210 and covers the connecting surface 211. At this time, the connecting surface 211 is a side surface of the recessed portion 210 that is convex, that is, the side surface of the recessed portion 210 that is convex is covered with the first fireproofing member 300; When the partition 200 is arranged on the outer surface of the box body 100, a part of the partition 200 is recessed into the box body 100 to form a recessed portion 210 and is inserted into the through hole 101, and a first fireproofing component 300 is arranged on the connecting surface 211 of the recessed portion 210 and covers the connecting surface 211 of the recessed portion 210. At this time, the connecting surface 211 is a side surface of the recessed portion 210 that is concave, that is, the first fireproofing component 300 is covered on the side surface of the recessed portion 210 that is concave.

[0094] With such arrangement, when thermal runaway occurs to one of the battery cells 20 in the box body 100, the high-temperature smoke generated by the thermal runaway of the battery cell 20 melts through the corresponding recessed portion 210 and is discharged from the corresponding through hole 101 to the outside of the box body 100. When the discharged high-temperature smoke diffuses outside the box body 100, it can be blocked by the first fireproof component 300 provided on the recessed portion 210 inserted in other through holes 101, thereby reducing the hidden danger of thermal runaway diffusion.

[0095] Please refer to Figure 6 and Figure 7 In some embodiments, the partition 200 is disposed on the inner surface of the box body 100 .

[0096] The partition 200 can be set on the inner surface of the box body 100. Specifically, the partition 200 can be fixed to the inner surface of the box body 100 by gluing and adhering, and the through hole 101 on the box body 100 is blocked on one side inside the box body 100, so that impurities such as metal particles outside the box body 100 cannot enter the interior of the box body 100.

[0097] In this way, when the partition 200 is arranged on the inner surface of the box body 100, the partition 200 is recessed toward the outside of the box body 100 to form a recessed portion 210 and is inserted into the corresponding through hole 101, and a first fireproof component 300 is arranged on the recessed portion 210 inserted into the through hole 101, so that the first fireproof component 300 covers the side surface of the recessed portion 210 facing the outside of the box body 100, and at the same time, other parts of the partition 200 are blocked by the box body 100, so that the first fireproof component 300 has a better protective effect on the recessed portion 210, and when there is a situation where thermal runaway occurs in the battery cell 20, the hidden danger of thermal runaway spread is effectively reduced.

[0098] Please refer to Figure 6 and Figure 7 In some embodiments, the separator 200 includes at least one of a paraffin layer, a plastic layer, and a gelatin layer.

[0099] In the event of thermal runaway of the battery cell 20, the battery cell 20 generates high-temperature flue gas carrying a large amount of heat due to thermal runaway. When the high-temperature flue gas is ejected and contacts the separator 200, the separator 200 including at least one of a paraffin layer, a plastic layer and a gelatin layer can be turned into a liquid phase and melted through, thereby allowing the through hole 101 blocked by the separator 200 to be opened, and the high-temperature flue gas can be discharged out of the box body 10 in a timely manner.

[0100] It should be understood that the separator 200 includes at least one of a paraffin layer, a plastic layer and a gelatin layer, and the separator 200 may also include multiple other molten material layers; wherein the above-mentioned molten material layer refers to a type of material layer that, when the temperature rises to a preset value, the kinetic energy of the thermal motion of the molecules increases, resulting in crystallization destruction and changing from a crystal phase to a liquid phase.

[0101] In some embodiments, the partition 200 may include a plastic layer, which may be a low melting point plastic, such as polypropylene, polycarbonate, etc. When preparing the plastic layer, a flat plastic hard sheet may be heated and softened, then vacuum-adsorbed on a mold surface, cooled and molded to obtain a plastic layer of a preset configuration, and then adhered and fixed to the inner surface of the box body 100 by applying glue on the bottom of the plastic layer.

[0102] With such arrangement, when the battery cell 20 in the box body 100 experiences thermal runaway, the heat generated by the battery cell 20 due to thermal runaway can reach the partition 200 , so that the through hole 101 can connect the inside and outside of the box body 100 , and the heat generated by the battery cell 20 due to thermal runaway can be discharged from the through hole 101 .

[0103] Please refer to Figure 6 and Figure 7In some embodiments, the box body 100 includes a bottom plate 110 , a through hole 101 is opened on the bottom plate 110 , and a partition 200 is arranged on the surface of the bottom plate 110 close to the battery cell 20 ; the explosion-proof valve 24 of the battery cell 20 faces the partition 200 .

[0104] The bottom plate 110 is a base structure of the box body 100 . It can be understood that when the battery cells 20 are assembled in the box body 100 , the bottom plate 110 can be used to support the battery cells 20 .

[0105] Through holes 101 are provided on the bottom plate 110. Optionally, the through holes 101 may be arranged in an array on the bottom plate 110; alternatively, the through holes 101 may be arranged in any direction and at intervals on the bottom plate 110; alternatively, the through holes 101 may be arranged in multiple directions and at intervals on the bottom plate 110; alternatively, the through holes 101 may be irregularly distributed on the bottom plate 110.

[0106] It can be understood that the battery cell 20 is assembled in the box body 100, and the explosion-proof valve 24 of the battery cell 20 is facing the partition 200. When the battery cell 20 has thermal runaway, the high-temperature flue gas carrying a large amount of heat generated by the thermal runaway will be ejected from the explosion-proof valve 24 of the battery cell 20 toward the partition 200. The partition 200 can be quickly melted through, that is, the through hole 101 can be opened in time, so that the high-temperature flue gas can be discharged from the through hole 101 in time.

[0107] Optionally, the explosion-proof valve 24 of the battery cell 20 can specifically face the recessed portion 210; when the battery cell 20 has thermal runaway, the explosion-proof valve 24 of the battery cell 20 can spray high-temperature flue gas toward the recessed portion 210, so that the recessed portion 210 is quickly melted through, so that the high-temperature flue gas can be sprayed toward the through hole 101 and outside the box body 100, effectively improving the efficiency of high-temperature flue gas discharge from the box body 100; the risk of heat accumulation in the box body 10 is effectively improved.

[0108] Please refer to Figures 6 to 8 In some embodiments, a plurality of through holes 101 are provided on the bottom plate 110, and at least some of the through holes 101 are arranged at intervals along a first direction D of the bottom plate 110 to form hole groups 102; one or more groups of hole groups 102 are formed on the bottom plate 110; when the number of the hole groups 102 is at least two, the hole groups 102 are arranged at intervals along a second direction H of the bottom plate 110, wherein the first direction D and the second direction H intersect.

[0109] It can be understood that the first direction D of the bottom plate 110 intersects with the second direction H of the bottom plate 110. Optionally, the first direction D and the second direction H can be perpendicular to each other. For example, the first direction D can be the length direction of the bottom plate 110, and the second direction H can be the width direction of the bottom plate. The first direction D of the bottom plate 110 can be specifically as follows: Figure 7 The second direction H of the bottom plate 110 can be specifically as follows: Figure 7 The direction H in.

[0110] The hole group 102 refers to a set of through holes 101 arranged at intervals along the first direction D of the bottom plate 110. When the battery cells 20 are assembled in the box body 100, the battery cells 20 can be arranged along the first direction D of the bottom plate 110, and the large surfaces of adjacent battery cells 20 are arranged opposite to each other; in this way, the explosion-proof valve 24 of each battery cell 20 can be respectively set to correspond to a through hole 101. When any battery cell 20 has thermal runaway, the battery cell 20 can spray high-temperature smoke through the explosion-proof valve 24 to the separator 200 covered by the corresponding through hole 101, thereby being able to meet the requirements of coping with thermal runaway of any battery cell 20.

[0111] The number of the hole groups 102 may be multiple, and the multiple hole groups 102 may be arranged at intervals along the second direction H of the bottom plate 110. Figure 7 As shown, Figure 7 A schematic diagram of the structure inside the box body 100 provided for some embodiments of the present application, wherein several groups of hole groups 102 blocked by the partition 200 and one group of hole groups 102 not blocked by the partition 200 are shown. When the battery cells 20 are assembled in the box body 100, the battery cells 20 can be arranged along the first direction D of the bottom plate 110, and the large surfaces of adjacent battery cells 20 are arranged opposite to each other; at the same time, the battery cells 20 can be arranged along the second direction H of the bottom plate 110 to form multiple rows. Specifically, the number of rows formed by the battery cells 20 arranged along the first direction D of the bottom plate 110 can be the same as the number of the hole groups 102. In this way, the explosion-proof valve 24 of each battery cell 20 can be respectively set corresponding to a through hole 101 to meet the requirements of coping with thermal runaway of any battery cell 20.

[0112] Please refer to Figures 6 to 8 In some embodiments, the number of separators 200 is the same as the number of hole groups 102 , and each separator 200 is configured to block all through holes 101 in the corresponding hole group 102 .

[0113] Optionally, when the number of hole groups 102 is one, the number of separators 200 may be one, and the separator 200 can completely cover the hole group 102 so that all through holes 101 in the hole group 102 are blocked by the separator 200 .

[0114] When there are multiple groups of hole groups 102, the hole groups 102 are arranged at intervals along the second direction H of the bottom plate 110, and the number of separators 200 is multiple and consistent with the number of hole groups 102; each separator 200 can cover the corresponding hole group 102 respectively, so that each separator 200 can block all the through holes 101 in the corresponding hole group 102.

[0115] With such an arrangement, when any battery cell 20 in the box body 100 experiences thermal runaway, the high-temperature flue gas discharged from the explosion-proof valve 24 of the battery cell 20 can melt through a corresponding partition, so that the corresponding through hole 101 of the corresponding hole group 102 can be connected and discharge the high-temperature flue gas; and the probability of the partitions 200 covering the other hole groups 102 being melted through is low, so that the partitions 200 covering the other hole groups 102 can continue to be used, and only one partition 200 corresponding to the battery cell 20 experiencing thermal runaway needs to be replaced, which effectively reduces the cost.

[0116] Please refer to Figure 2 , Figure 6 and Figure 7 In some embodiments, the box body 10 also includes a bottom guard plate 400, which is arranged on the outer side of the bottom plate 110, and an exhaust channel 410 is formed between the bottom guard plate 400 and the bottom plate 110, and the exhaust channel 410 is connected to the outside of the bottom guard plate 400, and the through hole 101 is connected to the exhaust channel 410.

[0117] It can be understood that the bottom guard plate 400 is used to be arranged on the outside of the bottom plate 110 and plays a protective role for the bottom plate 110 .

[0118] The bottom guard plate 400 can be fixedly assembled on the bottom plate 110 by fasteners, and the bottom guard plate 400 and the bottom plate 110 are spaced apart to form an exhaust passage 410, and the space between the bottom guard plate 400 and the bottom plate 110 can be connected to the outside of the bottom guard plate 400 and the bottom plate 110; when the battery cell 20 in the box body 100 has thermal runaway, the high-temperature flue gas generated by the thermal runaway melts through the through hole 101 and is discharged from the through hole 101, and the high-temperature flue gas discharged from the through hole 101 can be discharged from the exhaust passage 410 to the outside of the bottom guard plate 400, so that the bottom guard plate 400 can protect the bottom plate 110, and the bottom guard plate 400 has a low degree of obstruction to the discharge of high-temperature flue gas from the through hole 101, which effectively ensures a low probability of high-temperature flue gas accumulation in the box body 100.

[0119] Specifically, in the event of thermal runaway of a battery cell 20, when the high-temperature smoke exhausted from the battery cell 20 is discharged from the corresponding through hole 101 to the exhaust channel 410, the high-temperature smoke will diffuse to other through holes 101, and the first fireproof component 300 arranged on the side surface of the recessed portion 210 facing the outside of the box body 100 can block the contact between the high-temperature smoke and the recessed portion 210, thereby reducing the probability of the high-temperature smoke melting through other through holes 101 and contacting other battery cells 20 that have not experienced thermal runaway, thereby reducing the probability of thermal runaway spreading.

[0120] With such arrangement, an exhaust passage 410 is formed between the bottom guard plate 400 and the bottom plate 110. When a thermal runaway occurs to a battery cell 20 in the box body 10, the high-temperature flue gas generated by the thermal runaway of the battery cell 20 will melt through the partition 200 that blocks the through hole 101, so that the high-temperature flue gas can be discharged from the through hole 101 into the exhaust passage 410, and then discharged out of the bottom guard plate 400 through the exhaust passage 410.

[0121] Please refer to Figure 6 In some embodiments, a second fireproofing member 500 is provided on a surface of the bottom guard plate 400 facing the bottom plate 110 .

[0122] The second fireproof member 500 is used to reduce the risk of burning the bottom guard plate 400 when the high-temperature smoke is discharged from the through hole 101 to the exhaust channel 410. The second fireproof member 500 can be a structural member with a fireproof effect, for example, a fireproof coating, a fireproof patch, a fireproof adhesive, etc. The second fireproof member 500 can be fixed on the bottom guard plate 400 by coating, adhesion, etc.

[0123] With such arrangement, when thermal runaway occurs and high-temperature smoke is discharged from the box body 100 through the through hole 101 to the exhaust channel 410, the second fireproof component 500 can protect the bottom guard plate 400 and reduce the probability of the bottom guard plate 400 being burned and damaged by the high-temperature smoke.

[0124] Please refer to Figures 6 to 8 In some embodiments, the partition 200 includes a partition portion 220 and a blocking portion 230. The partition portion 220 is disposed on the inner surface of the box body 100 and is at least partially used to block the through hole 101. The blocking portion 230 is disposed on a side surface of the partition portion 220 facing the inside of the box body 100.

[0125] The partition 220 is used to be attached to the inner surface of the box body 100 and block the through hole 101. The partition 220 may be, but is not limited to, a block structure, a sheet structure, or a plate structure.

[0126] The enclosure 230 is arranged on a side surface of the partition 220 facing the inside of the box body 100. The enclosure 230 is used to enclose the side surface of the partition 220 facing the inside of the box body 100. When the gluing process is carried out in the box body 100, the enclosure 230 can prevent the colloid from entering the area enclosed by the enclosure 230, so as to reduce the probability of the partition 220 being covered by the colloid, thereby reducing the probability that the high-temperature flue gas cannot melt through the partition 220 due to the colloid.

[0127] Specifically, the enclosure 230 may be, but is not limited to, a polygonal enclosure structure (e.g., a triangular enclosure, a rectangular enclosure, etc.), an annular enclosure structure (e.g., a circular enclosure, an elliptical enclosure, etc.), etc. The enclosure 230 may be fixedly mounted on the surface of the partition 220, or the enclosure 230 may be integrally formed with the partition 220.

[0128] With such a configuration, the partition portion 220 of the partition 200 can be used to block the through hole 101, and the enclosure portion 230 of the partition 200 can play a blocking role to prevent the colloid from entering the enclosure portion 230 when the box body 100 is coated with glue, thereby reducing the probability that the high-temperature flue gas cannot melt through the partition portion 220 due to the colloid covering the partition portion 220, and at the same time can reduce the probability of the colloid contacting the explosion-proof valve 24 of the battery cell 20, thereby reducing the probability of the explosion-proof valve 24 failing.

[0129] Please refer to Figures 6 to 8 In some embodiments, in the thickness direction M of the partition 220 , the projection of the enclosure 230 is configured to be able to surround the projection of the explosion-proof valve 24 of the battery cell 20 .

[0130] It can be understood that the enclosure 230 can serve as a enclosure for the explosion-proof valve 24 of the battery cell 20 in the thickness direction M of the partition 220. When the inner surface of the box body 100 is coated with glue, the enclosure 230 can block the colloid, thereby preventing the colloid from flowing onto the partition 220, reducing the probability of the colloid contacting the explosion-proof valve 24 of the battery cell 20, and further reducing the risk of the explosion-proof valve 24 being blocked by the colloid and failing.

[0131] Please refer to Figures 6 to 8 In some embodiments, the enclosure portion 230 includes two first enclosure structures 231 and two second enclosure structures 232 that are arranged opposite to each other. The first enclosure structure 231 and the second enclosure structure 232 are both arranged on the partition portion 220, and the opposite ends of the first enclosure structure 231 are respectively connected to the two second enclosure structures 232; the height of the first enclosure structure 231 is less than the height of the second enclosure structure 232.

[0132] The first enclosure structure 231 may be, but not limited to, an enclosure plate, an enclosure rod, an enclosure block, etc. Similarly, the second enclosure structure 232 may be, but not limited to, an enclosure plate, an enclosure rod, an enclosure block, etc. The first enclosure structure 231 and the second enclosure structure 232 are sequentially connected end to end to form the enclosure portion 230 and play a role in enclosure of the partition portion 220.

[0133] When the battery cell 20 is assembled in the box body 100, the battery cell 20 is arranged on the inner surface of the box body 100 and squeezes the enclosure 230. Since the height of the first enclosure structure 231 is less than the height of the second enclosure structure 232, the first enclosure structure 231 is squeezed by the battery cell 20 to a smaller extent, or the first enclosure structure 231 is not squeezed by the battery cell 20. Therefore, the reaction force of the first enclosure structure 231 on the battery cell 20 is small or there is no reaction force. Therefore, the reaction force of the enclosure 230 on the battery cell 20 is relatively smaller, thereby reducing the probability of the battery cell 20 being bounced.

[0134] For example, in some specific embodiments, a plurality of through holes 101 are provided on the bottom plate 110 of the box body 100, and the plurality of through holes 101 can be arranged at intervals along the width of the bottom plate 110 to form a plurality of hole groups 102; the separators 200 are in a strip-shaped structure, and the number of the separators 200 is consistent with the number of the hole groups 102. The length of each separator 200 is arranged along the length of the bottom plate 110, and each separator 200 can block all the through holes 101 included in the corresponding hole group 102; A plurality of recessed portions 210 are formed on the partition 200, and each recessed portion 210 is respectively inserted into a corresponding through hole 101, and a fire-retardant coating is coated on the surface of each recessed portion 210 facing the outside of the box body 100; a bottom guard plate 400 is also provided outside the box body 100, and the bottom guard plate 400 is assembled to the outer surface of the bottom plate 110 of the box body 100 by fasteners, and an exhaust passage 410 is formed between the bottom guard plate 400 and the outer surface of the bottom plate 110, and each through hole 101 is respectively connected to the exhaust passage 410. Among them, the partition 200 includes a strip-shaped partition and an enclosure portion 230 integrally formed on the surface of the partition facing the inner side of the box body 100, the enclosure portion 230 includes two first enclosure structures 231 and two second enclosure structures 232, the two first enclosure structures 231 are respectively located at the short sides of the partition, and the two second enclosure structures 232 are respectively located at the long sides of the partition, and the first enclosure structure 231 and the second enclosure structure 232 are connected end to end in sequence. When the battery cells 20 are assembled in the box body 100, the battery cells 20 can be arranged in sequence along the length direction of the bottom plate 110, so that the explosion-proof valves 24 of the battery cells 20 in the same row can be arranged one by one with the respective recessed portions 210 of the corresponding partition 200. At the same time, in the battery cells 20 in the same row, each battery cell 20 only squeezes the second enclosure structure 232, and the height of the first enclosure structure 231 is smaller than the second enclosure structure 232. The head and tail battery cells 20 in the battery cells 20 in the same row will not squeeze the first enclosure structure 231, so that the first enclosure structure 231 will not exert a reaction force on the head and tail battery cells 20 in the same row, effectively reducing the reaction force on the head and tail battery cells 20 in the same row, so as to ensure the stability of the assembly of the battery cells 20 and prevent the battery cells 20 from being bounced.

[0135] Please refer to Figure 2 In a second aspect, an embodiment of the present application further provides a battery 1100 , comprising a battery cell 20 and the box body 10 as described above, wherein the battery cell 20 is disposed in the box body 100 of the box body 10 .

[0136] The battery 1100 provided in the embodiment of the present application includes the above-mentioned box body 10. On the basis that the above-mentioned box body 10 can use the partition 200 to block the through hole 101 to reduce the probability of insulation failure caused by metal particles outside the box body 100 entering the box body 100, the probability of insulation failure of the battery 1100 is also low.

[0137] Please refer to Figure 2 , Figure 6 and Figure 7 In some embodiments, there are multiple battery cells 20 , and the multiple battery cells 20 are accommodated in the box body 100 , and the explosion-proof valve 24 of each battery cell 20 faces the corresponding through hole 101 opened on the box body 100 .

[0138] It can be understood that the explosion-proof valve 24 of each battery cell 20 is facing the corresponding through hole 101 opened on the box body 100, and the through hole 101 is blocked by the partition 200. When any battery cell 20 has thermal runaway, the explosion-proof valve 24 of the battery cell 20 will spray high-temperature flue gas toward the through hole 101. After the high-temperature flue gas contacts the partition 200, the partition 200 can be quickly melted through, so that the high-temperature flue gas can be discharged from the through hole 101 to the outside of the box body 100 in time, so as to reduce the probability of high-temperature flue gas accumulating in the box body 100 and causing the risk of combustion or explosion.

[0139] Please refer to Figure 1 In a third aspect, an embodiment of the present application further provides an electrical device, comprising a battery as described above.

[0140] It can be understood that the power-consuming device can be, but is not limited to, a mobile phone, a computer, a toy, an electric car, a ship, a spacecraft, etc. In some specific implementations, the power-consuming device can be a vehicle 1000 , and the battery 1100 can be used to provide power to the vehicle 1000 .

[0141] The electrical equipment provided in the embodiment of the present application includes the above-mentioned battery 1100. Based on the low probability of insulation failure of the above-mentioned battery 1100, the probability of leakage of the electrical equipment is also lower.

[0142] The above are only preferred embodiments of the present application and are not intended to limit the embodiments of the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A box for accommodating a battery cell, characterized in that: The box body comprises: A box body, wherein a through hole is formed in the box body; and A separator is provided on the box body and blocks the through hole; the separator is configured to be melted through when thermal runaway occurs in the battery cell.

2. The box according to claim 1, characterized in that: A portion of the partition is recessed toward the box body to form a recessed portion, and the recessed portion is inserted into the through hole.

3. The box according to claim 2, characterized in that: The box body also includes a first fireproof component, the recessed portion has a connecting surface arranged opposite to the box body, and the first fireproof component is arranged on the connecting surface.

4. The box according to any one of claims 1 to 3, characterized in that: The partition is arranged on the inner surface of the box body.

5. The box according to any one of claims 1 to 4, characterized in that: The separator includes at least one of a paraffin layer, a plastic layer, and a gelatin layer.

6. The box according to any one of claims 1 to 5, characterized in that: The box body comprises a bottom plate, the through hole is opened on the bottom plate, the partition is arranged on the surface of the bottom plate close to the battery cell; the explosion-proof valve of the battery cell faces the partition.

7. The box according to claim 6, characterized in that: A plurality of through holes are provided on the base plate, and at least some of the through holes are arranged at intervals along a first direction of the base plate to form hole groups; one or more groups of hole groups are formed on the base plate, and when the number of the hole groups is at least two, the hole groups are arranged at intervals along a second direction of the base plate; wherein the first direction and the second direction intersect.

8. The box according to claim 7, characterized in that: The number of the separators is the same as the number of the hole groups, and each separator is configured to block all the through holes in the corresponding hole group.

9. The box according to any one of claims 6 to 8, characterized in that: The box body also includes a bottom guard plate, which is arranged on the outer side of the bottom plate. An exhaust passage is formed between the bottom guard plate and the bottom plate. The exhaust passage is connected to the outside of the bottom guard plate, and the through hole is connected to the exhaust passage.

10. The box according to claim 9, characterized in that: A second fireproofing component is arranged on a surface of one side of the bottom guard plate facing the bottom plate.

11. The box according to any one of claims 6 to 10, characterized in that: The partition comprises a partition portion and a blocking portion. The partition portion is arranged on the inner surface of the box body and is at least partially used to block the through hole. The blocking portion is arranged on a side surface of the partition portion facing the inside of the box body.

12. The box according to claim 11, characterized in that: The projection of the enclosure portion in the thickness direction of the partition portion is configured to be able to surround the projection of the explosion-proof valve of the battery cell.

13. The box according to claim 12, characterized in that: The enclosure portion includes two first enclosure structures arranged opposite to each other and two second enclosure structures arranged opposite to each other. The first enclosure structure and the second enclosure structure are both arranged on the partition portion, and the opposite ends of the first enclosure structure are respectively connected to the two second enclosure structures; the height of the first enclosure structure is less than the height of the second enclosure structure.

14. A battery, characterized in that: The invention comprises a battery cell and a box body as claimed in claims 1 to 13, wherein the battery cell is arranged in a box body of the box body.

15. The battery according to claim 14, characterized in that: There are multiple battery cells, which are accommodated in the box body, and the explosion-proof valve of each battery cell faces the corresponding through hole opened on the box body.

16. An electrical equipment, characterized in that: Comprising the battery as claimed in claims 14 and 15.

Images