Cases, batteries, and electrical equipment

Abstract

Embodiments of the present application provide a case (10), a battery (1100), and an electrical device, the case (10) including a case body (100) having a communication hole (101) and a partition member (200) installed in the case body (100) and sealing the communication hole (101), wherein the partition member (200) is configured to melt and fall out in the event of thermal runaway in the battery cell (20), and in embodiments of the present application, the partition member (200) does not allow communication between the inside and outside of the case body (100). The communication holes (101) can be sealed in such a way that impurities such as metal particles from outside the case body (100) cannot enter the case body (100) through the communication holes (101). This reduces the probability of insulation failure caused by metal particles from outside the case body (100) entering the case body (100), and the partition member (200) can melt down due to the heat from thermal runaway, allowing the heat to be released in a timely manner, thereby reducing the risk of heat concentration causing combustion or explosion.

Description

Technical Field

[0004]

[0001] This application cites Chinese Patent Application No. 202311380306.X, titled "Case, Battery and Electrical Equipment", filed on October 24, 2023, the entire content of which is incorporated herein by reference.

[0002] This application relates to the technical field of battery structures, and in particular, provides a case, a battery and an electrical equipment.

Background Art

[0003] Generally, communication holes are opened in the case of a battery. When a thermal runaway occurs in the battery cells inside the case, the high-temperature gas generated by the thermal runaway can be discharged from the communication holes to the outside of the case, avoiding the risk of heat concentrating inside the case and causing combustion or explosion.

[0004] However, when adopting the technical solution of opening communication holes in the case, external impurity particles may enter the case through the communication holes. For example, metal particulate substances outside the base plate or on the bottom guard plate of the case may enter the case through the communication holes, which may cause the insulation protection inside the case to fail.

Summary of the Invention

[0005] The purpose of the embodiments of this application is to provide a case, a battery and an electrical equipment to solve the problem that when opening communication holes in the base plate of the case to deal with thermal runaway in the related art, external metal particles may enter the case and cause insulation failure. <00000​​​​​​In a first aspect, an embodiment of the present invention provides a case for housing a battery cell, the case comprising a case body having a communication hole and a partition member installed in the case body and sealing the communication hole, wherein the partition member is configured to melt and fall out in the event of thermal runaway in the battery cell.

[0008] The beneficial effects of the embodiment of the present invention are as follows. The case provided by the embodiment of the present invention has communication holes in the case body and a partition member installed in the case body to seal the communication holes. In normal operation, the partition member can seal the communication holes so that the inside and outside of the case body do not communicate, and impurities such as metal particles from outside the case body cannot enter the case body through the communication holes. This reduces the probability of insulation failure caused by metal particles from outside the case body entering the case body. At the same time, if thermal runaway occurs in the battery cells inside the case, the partition member can melt and fall off due to the heat of the thermal runaway, thereby opening the communication holes and allowing heat inside the case body to be released in a timely manner, reducing the risk of heat concentration causing combustion or explosion.

[0009] In some embodiments, a portion of the partition member is recessed toward the case body to form a recess, which is then inserted into a communication hole.

[0010] By adopting the above technical proposal, when assembling the partition members to the case body, the recesses of the partition members can be used to insert them into the communication holes, thereby achieving the purpose of positioning and assembly and effectively improving assembly efficiency.

[0011] In some embodiments, the case further includes a first fire-resistant member, the recess having a connecting surface that is installed opposite the case body, and the first fire-resistant member is installed on the connecting surface.

[0012] By adopting the above-described technology, a first fire-resistant member is installed on the connection surface of the recess. When thermal runaway occurs in one of the battery cells inside the case body, the high-temperature gas generated by the thermal runaway of the battery cell melts through the corresponding recess and is discharged outside the case body through the corresponding communication hole. When the discharged high-temperature gas diffuses outside the case body, it is prevented by the first fire-resistant member installed in the recess inserted into the other communication hole, thereby reducing the risk of thermal runaway diffusion.

[0013] In some embodiments, the partition member is installed on the inner surface of the case body.

[0014] By adopting the above technical proposal, the partition member is installed on the inner surface of the case body, the partition member seals the communication hole on the case body on one side inside the case body, and impurities such as metal particles from outside the case body cannot enter the inside of the case body.

[0015] In some embodiments, the partition member includes at least one of a paraffin layer, a plastic layer, and a gelatin layer.

[0016] By adopting the above-described technology, if thermal runaway occurs in the battery cells inside the case, the heat generated by the thermal runaway of the battery cells can melt the partition material, thereby allowing the communication holes to connect the inside and outside of the case, and the heat generated by the thermal runaway of the battery cells to be discharged through the communication holes.

[0017] In some embodiments, the case body includes a base plate, communication holes are provided in the base plate, a partition member is installed on the surface of the base plate adjacent to the battery cell, and the explosion-proof valve of the battery cell faces the partition member.

[0018] By adopting the above technical proposal, communication holes are opened in the base plate of the case body, and partition members are installed on the surface of the base plate adjacent to the battery cells to seal the communication holes. The explosion-proof valves of the battery cells inside the case body face the partition members, and when thermal runaway occurs in the battery cells, the high-temperature gas generated by the thermal runaway can be discharged from the explosion-proof valves of the battery cells and come into contact with the partition members. The partition members can melt and fall in a timely manner, allowing conductivity through the communication holes. As a result, the high-temperature gas generated by the thermal runaway of the battery cells can be discharged from the communication holes in a more timely manner, reducing the probability of heat buildup inside the case body.

[0019] In some embodiments, a base plate has a plurality of communication holes, and at least some of the communication holes are spaced apart along a first direction of the base plate to form a set of holes, and one or more sets of hole sets are formed in the base plate, and if there are at least two sets of hole sets, the sets of holes are spaced apart along a second direction of the base plate, and the first direction and the second direction intersect.

[0020] By adopting the above technical proposal, the communication holes opened in the base plate can be arranged along a first direction of the base plate to form a set of holes, and if there are at least two sets of holes, the sets of holes can be spaced apart along a second direction of the base plate. As a result, when the battery cells are assembled in the case body, multiple battery cells can be arranged along the first direction of the base plate, and multiple rows of battery cells can be spaced apart along the second direction of the base plate. As a result, explosion-proof valves for each battery cell can be installed corresponding to each communication hole to improve efficiency in responding to thermal runaway of the battery cells.

[0021] In some embodiments, the number of partition members is the same as the number of hole sets, and each partition member is positioned to seal all the communication holes in the corresponding hole set.

[0022] By adopting the above technical solution, in order to seal the communication holes of the corresponding hole sets respectively by using a plurality of partition members and thereby achieve the purpose of cost reduction, the material usage amount of the partition members is reduced.

[0023] In some embodiments, the case further includes a bottom guard plate. The bottom guard plate is installed outside the base plate, and an exhaust passage is formed with a gap between the bottom guard plate and the base plate. The exhaust passage communicates with the outside of the bottom guard plate, and the communication hole communicates with the exhaust passage.

[0024] By adopting the above technical solution, an exhaust passage is formed with a gap between the bottom guard plate and the base plate. When thermal runaway occurs in the battery cells in the case, the high-temperature gas generated by the thermal runaway of the battery cells melts and drops the partition member that seals the communication hole. As a result, the high-temperature gas can be discharged from the communication hole to the exhaust passage, and further discharged outside the bottom guard plate through the exhaust passage.

[0025] In some embodiments, a second fireproof member is installed on the surface of the bottom guard plate on the side facing the base plate.

[0026] By adopting the above technical solution, by installing a second fireproof member on the surface of the bottom guard plate on the side facing the base plate, when thermal runaway occurs, when the high-temperature gas is discharged from the case body to the exhaust passage through the communication hole, the second fireproof member can play a role in protecting the bottom guard plate and reduce the probability that the bottom guard plate is damaged by the high-temperature gas.

[0027] In some embodiments, the partition member includes a partition portion and an enclosing portion. The partition portion is installed on the inner surface of the case body and is at least partially used to seal the communication hole. The enclosing portion is installed on the surface of the partition portion on the side facing the inside of the case body.

[0028] By adopting the above technical solution, the partition part of the partition member can be used to seal the communication hole, the surrounding part of the partition member can play the role of surrounding, and when applying an adhesive to the case body, it can be avoided that the adhesive enters the surrounding part, thereby reducing the probability that the adhesive contacts the explosion-proof valve of the battery cell, and further reducing the probability of occurrence of failure of the explosion-proof valve.

[0029] In some embodiments, in the thickness direction of the partition part, the projection of the surrounding part is arranged so as to surround the projection of the explosion-proof valve of the battery cell.

[0030] By adopting the above technical solution, the projection of the surrounding part can surround the projection of the explosion-proof valve of the battery cell, so that the surrounding part can play a role of surrounding and protecting the explosion-proof valve, and further reduce the probability that the adhesive contacts the explosion-proof valve of the battery cell, thereby further reducing the probability of occurrence of failure of the explosion-proof valve.

[0031] In some embodiments, the surrounding part includes two first surrounding structures installed oppositely and two second surrounding structures installed oppositely. Both the first surrounding structure and the second surrounding structure are installed on the partition part. Both ends of the first surrounding structure facing each other are respectively connected to the two second surrounding structures, and the height of the first surrounding structure is smaller than the height of the second surrounding structure.

[0032] By adopting the above technical solution, when assembling the battery cell into the case body, the battery cell presses the surrounding part and is assembled into the case body. Since the first surrounding structure and the second surrounding structure of the surrounding part have a height difference, the reaction force of the first surrounding structure on the battery cell can be reduced, thereby effectively reducing the elastic force from the surrounding part received by the battery cell, and further reducing the probability that the battery cell bounces up.

[0033] In a second aspect, the embodiment of the present application further provides a battery including a battery cell and the above case, where the battery cell is installed in the case body of the case.

[0034] The beneficial effects of the embodiments of the present invention are as follows: The battery provided by the embodiments of the present invention includes the above-mentioned case, and the probability of insulation failure in the battery is relatively low because the probability of metal particles from outside the case body entering the case body and causing insulation failure is reduced by sealing the communication holes using partition members.

[0035] In some embodiments, there are multiple battery cells, which are housed within a case body, and the explosion-proof valve of each battery cell faces a corresponding communication hole opened in the case body.

[0036] By adopting the above-described technology, the explosion-proof valve of each battery cell faces a corresponding communication hole opened in the case body. When thermal runaway occurs in any one of the battery cells, the high-temperature gas generated by the thermal runaway in that battery cell can be discharged from the explosion-proof valve to the communication hole, causing the partition member sealing the communication hole to melt and allowing the high-temperature gas to be discharged outside the case body in a timely manner.

[0037] In a third aspect, the embodiment of the present application further provides an electrical device including the battery described above.

[0038] The beneficial effects of the embodiments of the present invention are as follows: The electrical equipment provided by the embodiments of the present invention includes the above-mentioned battery, and based on the relatively low probability of insulation failure occurring in the battery, the probability of leakage current in the electrical equipment is also lower.

[0039] To more clearly explain the technical concept in the embodiments of the present application, the drawings used in the description of the embodiments or the prior art are briefly introduced below. Clearly, the drawings in the following description are only a few embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative work. [Brief explanation of the drawing]

[0040] [Figure 1] This is a schematic diagram of the structure of a vehicle provided by some embodiments of the present application. [Figure 2] This is an exploded view of a battery provided by some embodiments of the present application. [Figure 3] This is a schematic diagram of the exploded structure of a battery cell provided by some embodiments of the present application. [Figure 4] This is a schematic diagram of a structure in which a battery cell is assembled inside a case body provided by several embodiments of the present invention. [Figure 5] This is a schematic diagram of the specific structure between the case body and the battery cell provided by some embodiments of the present application. [Figure 6] This is a schematic diagram showing a localized enlargement of area A in Figure 5. [Figure 7] This is a schematic diagram of the internal structure of the case body provided by several embodiments of the present application. [Figure 8] This is a schematic diagram of the structure of a partition member provided by some embodiments of the present application. [Modes for carrying out the invention]

[0041] The embodiments of the present application will be described in detail below, and examples of the above embodiments are shown in the drawings, where the same or similar reference numerals throughout the text represent the same or similar elements, or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended for use in interpreting the present application, and should not be understood as limiting the present application.

[0042] In the description of the embodiments of this application, it should be understood that the orientations or positional relationships indicated by terms such as "length," "width," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," and "outside" are orientations or positional relationships shown based on the drawings, and are merely for the purpose of facilitating and simplifying the description of the embodiments of this application. They do not indicate or imply that the referred device or element has a specific orientation, is configured in a specific orientation, or must be operated in a specific orientation, and therefore should not be understood as limiting the embodiments of this application.

[0043] Furthermore, the terms “first” and “second” are merely for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the quantity of the technical features being referred to. Accordingly, features designated as “first” and “second” may explicitly or implicitly include one or more such features. In the description of the embodiments of this application, “multiple” means two or more unless otherwise clearly and specifically limited.

[0044] In the embodiments of this application, unless otherwise specifically defined and limited, terms such as "attachment," "connection," "bonding," and "fixing" should be understood in a broad sense, and may include, for example, a fixed connection, a removable connection, or a single unit, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or an internal communication between two elements or an interaction relationship between two elements. A person skilled in the art may understand the specific meaning of the above terms in the embodiments of this application depending on the specific circumstances.

[0045] Judging from the current market developments, the applications of power batteries are becoming increasingly broad. Power batteries are not only used in energy storage systems such as hydroelectric, thermal, wind, and solar power plants, but also in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in multiple fields such as military equipment and aerospace. As the application fields of power batteries continue to expand, the market demand for them will also continue to increase.

[0046] A battery consists of a case and multiple battery cells assembled inside the case. During the use of the battery, there is a risk of thermal runaway in the battery cells inside. When a battery cell experiences thermal runaway, it releases a large amount of hot gas through an explosion-proof valve. If this large amount of hot gas accumulates inside the case, there is a risk that the battery will burn and explode.

[0047] To reduce the risk of heat buildup inside the case leading to combustion or explosion, related technologies involve creating communication holes in the battery case, allowing communication between the inside and outside of the case. Even if thermal runaway occurs in the battery cells, the high-temperature gas generated by the runaway can be discharged outside the case through the communication holes, thereby reducing the risk of high-temperature gas buildup inside the case and further reducing the risk of combustion or explosion of the battery cells. However, when adopting a technology that involves creating communication holes in the case, external impurity particles may enter the case through the communication holes. For example, metallic particulate matter on the outside of the case's base plate or bottom guard plate may enter the case through the communication holes, potentially causing a failure in the insulation protection inside the case and creating a risk of electrical leakage.

[0048] Based on the above considerations, in order to solve the problem that external metal particles may enter the case and cause insulation failure when a communication hole is made in the case to deal with thermal runaway, the case is designed with a communication hole in the case body and a partition member installed in the case body to seal the communication hole. As a result, external impurities such as particulate metal substances cannot enter the case body through the communication hole, and at the same time, if thermal runaway occurs, the high-temperature gas generated by the thermal runaway can melt through the partition member, thereby allowing the high-temperature gas to be discharged to the outside of the case body through the communication hole.

[0049] The case of this invention can meet the need to address thermal runaway. High-temperature gas generated by thermal runaway can melt through the partition member and be discharged outside the case body through the communication hole. At the same time, in normal conditions when thermal runaway is not occurring, the partition member can prevent impurities such as metallic particulate matter from entering the case body from the outside, thereby reducing the risk of insulation failure due to the entry of metallic particulate matter and other impurities into the case body, and further reducing the risk of electrical leakage.

[0050] The cases disclosed in the embodiments of this application may be used in electrical equipment that uses batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical equipment may include, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, electric scooters, electric vehicles, ships, and aerospace vehicles. Among these, electric toys may include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric boat toys and electric airplane toys, and aerospace vehicles may include airplanes, rockets, space shuttles and spacecraft.

[0051] In the following embodiments, for the sake of explanation, the electrical equipment according to one embodiment of the present application will be described as a vehicle 1000.

[0052] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 provided by some embodiments of the present application, the vehicle 1000 may be a fuel-powered vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range extender vehicle, etc. A battery 1100 is installed inside the vehicle 1000, and the battery 1100 may be installed in 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 can function as the operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 1200 and a motor 1300, the controller 1200 controlling the battery 1100 to supply power to the motor 1300, and is used, for example, to meet the operating power needs of the vehicle 1000 during starting, navigation, and driving.

[0053] In some embodiments of the present invention, the battery 1100 may not only be used as an operating power source for the vehicle 1000, but can also be used as a driving power source for the vehicle 1000, providing driving force to the vehicle 1000 by completely or partially replacing fuel or natural gas.

[0054] Referring to Figure 2, which is an exploded view of a battery 1100 provided by several embodiments of the present invention, the battery 1100 comprises a case 10 and a battery cell 20, the battery cell 20 being housed within the case 10. The case 10 is used to provide housing space for the battery cell 20, and the case 10 can employ various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 covering each other, and together the first portion 11 and the second portion 12 defining housing space for housing the battery cell 20. The second part 12 may be a hollow structure with one end open, and 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 together define a housing space, and both the first part 11 and the second part 12 may 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 case 10 formed by the first part 11 and the second part 12 may be of various shapes such as a cylinder or a rectangular parallelepiped.

[0055] In the battery 1100, there may be multiple battery cells 20, and the connections between the multiple battery cells 20 may be in series, in parallel, or in series-parallel. Series-parallel connection means that the multiple battery cells 20 have both series and parallel connections. The connections between the multiple battery cells 20 may be directly in series, in parallel, or in series-parallel. Furthermore, the entire assembly of the multiple battery cells 20 is housed in a case 10. Of course, the battery 1100 may be in a form in which the multiple battery cells 20 are first connected in series, in parallel, or in series-parallel to form a battery module, and the multiple battery modules are further connected in series, in parallel, or in series-parallel to form the whole, and housed in a case 10. The battery 1100 may further include other structures, for example, the battery 1100 may further include bus members for realizing electrical connections between the multiple battery cells 20.

[0056] Each battery cell 20 may be a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 20 may be cylindrical, flattened, rectangular, or have other shapes.

[0057] Referring to Figure 3, which is a schematic diagram of the exploded structure of a battery cell 20 provided in some embodiments of the present application, the battery cell 20 refers to the smallest unit constituting a battery. As shown in Figure 3, the battery cell 20 includes an end cap 21, a casing 22, a battery core assembly 23, and other functional components.

[0058] The end cap 21 refers to a component that covers the opening of the casing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cap 21 may, but is not limited to, conform to the shape of the casing 22 for fitting into the casing 22. Selectively, the end cap 21 may be made of a material having a certain hardness and strength (e.g., an aluminum alloy), so that the end cap 21 is less prone to deformation when subjected to pressure and impact, the battery cell 20 can have higher structural strength, and safety performance can be improved. Functional components such as electrode terminals 21a may be installed on the end cap 21. The electrode terminals 21a may be used to electrically connect to the battery core assembly 23 so that they are used to output or input electrical energy from the battery cell 20. In some embodiments, the end cap 21 may further be equipped with a pressure release mechanism, such as an explosion-proof valve, for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 21 may be made of various materials such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic, and is not particularly limited in the embodiments of this application. In some embodiments, an insulating member may be further installed inside the end cap 21, which may be used to isolate the electrical connection members in the casing 22 from the end cap 21 in order to reduce the risk of short circuits. Exemplarily, the insulating member may be made of plastic, rubber, or the like.

[0059] The casing 22 is an assembly that fits with the end cap 21 to form the internal environment of the battery cell 20, which may be used to house the battery core assembly 23, electrolyte, and other components. The casing 22 and the end cap 21 may be separate components, and the casing 22 may have an opening, which the end cap 21 covers to form the internal environment of the battery cell 20. The end cap 21 and the casing 22 may be integrated, but are not limited to this, and specifically, the end cap 21 and the casing 22 may first form a common assembly surface before other components are placed in the casing, and if it is necessary to seal the inside of the casing 22, the end cap 21 covers the casing 22. The casing 22 may be of various shapes and dimensions, such as a rectangular parallelepiped, cylindrical shape, or hexagonal prism shape. Specifically, the shape of the casing 22 may be determined according to the specific shape and dimensions of the battery core assembly 23. The casing 22 may be made of various materials such as copper, iron, aluminum, stainless steel, aluminum alloy, or plastic, and is not particularly limited in the embodiments of this application.

[0060] The battery core assembly 23 is a component that undergoes an electrochemical reaction in the battery cell 1100. The casing 22 may contain one or more battery core assemblies 23. The battery core assembly 23 is mainly formed by winding or stacking positive electrode pieces and negative electrode pieces, and usually a separator film is provided between the positive electrode pieces and negative electrode pieces. The portions of the positive electrode pieces and negative electrode pieces that have active material constitute the main body of the battery core assembly, and the portions of the positive electrode pieces and negative electrode pieces that do not have active material each constitute a tab 23a. The positive electrode tab and the negative electrode tab may be located together at one end of the main body, or they may be located at both ends of the main body, respectively. During the charging and discharging process of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs 23a are connected to the electrode terminals to form a current loop.

[0061] The following describes the cases provided by the embodiments of this application.

[0062] According to some embodiments of the present application, referring to Figures 2, 4 and 7, embodiments of the present application provide a case 10 for housing a battery cell 20, the case 10 comprising a case body 100 from which a communication hole 101 is provided, and a partition member 200 installed in the case body 100 and sealing the communication hole 101, wherein the partition member 200 is configured to melt and fall out in the event of thermal runaway in the battery cell 20.

[0063] Of these, the case body 100 is the main structure of the case 10, and the case body 100 may include a first part 11 and a second part 12, thereby providing a communication hole 101 in the case body 100, and the communication hole 101 may be specifically provided in the first part 11, or in the second part 12, or in both the first part 11 and the second part 12.

[0064] The communication hole 101 penetrates the case body 100 and allows electrical contact between the inside and outside of the case body 100. Specifically, the communication hole 101 may be a circular hole, an oblong hole, a rectangular hole, a slit hole, etc., but is not limited to these.

[0065] The partition member 200 is used to seal the communication hole 101. Specifically, the partition member 200 may be fixed and assembled to the case body 100, for example, by bonding with adhesive, fixing with fastening members, or engagement. The partition member 200 may be fixed and assembled to the inner surface of the case body 100, or fixed and assembled to the outer surface of the case body 100, or the partition member 200 can be further inserted into the communication hole 101 to seal the communication hole 101. In this configuration, the inside of the case body 100 refers to one side of the case body 100 for housing the battery cells 20, and the outside of the case body 100 refers to the other side opposite the inside.

[0066] The partition member 200 may be a partition plate, partition block, partition column, etc., but is not limited to these. The number of partition members 200 may be one or more, and one partition member 200 may be used only to seal one communication hole 101, or one partition member 200 may seal multiple communication holes 101 simultaneously.

[0067] The partition member 200 can melt down if thermal runaway occurs in the battery cell 20, allowing the communication hole 101 to conduct electricity and enabling the large amount of hot gas generated by the thermal runaway of the battery cell 20 to be discharged to the outside of the case body 100 through the communication hole 101. Specifically, the partition member 200 may be a molten material with a low melting point, such as plastic or paraffin, or it may be a flammable material with a low flash point, such as paper or a fiber layer. The hot gas generated by thermal runaway can melt down or burn through the partition member 200 in order to conduct electricity through the communication hole 101.

[0068] The case 10 provided by the embodiment of the present invention has a communication hole 101 in the case body 100 and a partition member 200 installed in the case body 100 to seal the communication hole 101. In normal operation, the partition member 200 can seal the communication hole 101 so that the inside and outside of the case body 100 do not communicate, and impurities such as metal particles from outside the case body 100 cannot enter the case body 100 through the communication hole 101. This reduces the probability of insulation failure caused by metal particles from outside the case body 100 entering the case body 100, and also reduces the probability of electrical leakage. At the same time, if thermal runaway occurs in the battery cell 20 inside the case 10, the partition member 200 can melt and fall off due to the heat of the thermal runaway, thereby opening the communication hole 101 and allowing the heat inside the case body 100 to be released in a timely manner, thus avoiding the risk of heat concentration causing combustion or explosion.

[0069] Referring to Figures 5 to 7, in some embodiments, a portion of the partition member 200 is recessed toward the case body 100 to form a recess 210, and the recess 210 is inserted into the communication hole 101.

[0070] The recess 210 is formed by recessing a portion of the partition member 200 toward the communication hole 101. The recess 210 is used for insertion into the communication hole 101, thereby enabling the partition member 200 to be positioned and installed by the insertion and fitting of the recess 210 and the communication hole 101.

[0071] Specifically, the recess 210 may be a columnar protrusion, a spherical protrusion, a block-shaped protrusion, etc., but is not limited to these. Alternatively, the external structure of the recess 210 can be adapted to the corresponding communication hole 101. In this case, the communication hole 101 corresponding to the recess 210 refers to the communication hole 101 into which the recess 210 is to be inserted. By adapting the external structure of the recess 210 to the corresponding communication hole 101 or by setting it to be approximately the same, the recess 210 can be easily inserted into the corresponding communication hole 101 and assembled.

[0072] As can be understood, the number of recesses 210 formed in the partition member 200 may be the same as the number of communication holes 101 that the partition member 200 seals, or the number of recesses 210 may be less than the number of communication holes 101 that are sealed. For example, when one of the partition members 200 is used to seal x communication holes 101, one recess 210 may be formed in the partition member 200, and the partition member 200 may be positioned and installed by inserting the recess 210 into the corresponding communication hole 101, and the other part of the partition member 200 may be able to seal another x-1 communication holes 101, where x may be an integer of 1 or more, or when one of the partition members 200 is used to seal y communication holes 101, more than one and less than y recesses 210 may be formed in the partition member 200, and these recesses 210 may be The partition member 200 is inserted into the corresponding communication hole 101 to assemble a positioning guide, thereby allowing the other parts of the partition member 200 to seal the y communication holes 101 that are not inserted into the recesses 210, where y may be an integer greater than 2. Alternatively, when one partition member 200 is used to seal z communication holes 101, z recesses 210 may be formed in the partition member 200, and the positioning guide assembly of the partition member 200 can be achieved by inserting each of these recesses 210 into the corresponding communication hole 101, where z may be an integer greater than or equal to 2.

[0073] When installed in this manner, the partition member 200 can be inserted into the corresponding communication hole 101 by utilizing the recess 210 of the partition member 200 when assembling it to the case body 100. This achieves the purpose of positioning and assembly, and effectively improves assembly efficiency.

[0074] Referring to Figures 5 to 7, in some embodiments, the case 10 further includes a first fire-resistant member 300, the recess 210 has a connecting surface 211 that is installed facing the case body 100, and the first fire-resistant member 300 is installed on the connecting surface 211.

[0075] The first fire-resistant member 300 is used to reduce the risk of the recess 210 accidentally melting due to high-temperature gas outside the case body 100. The first fire-resistant member 300 may be a structural member having a fire-resistant effect, such as a fire-resistant coating, fire-resistant patch, or fire-resistant tape. The first fire-resistant member 300 may be fixed to the recess 210 by methods such as coating or adhesive.

[0076] The connecting surface 211 refers to one surface in the recess 210 for installing the first fire-resistant member 300. It should be understood that the connecting surface 211 is installed facing the case body 100, that is, the connecting surface 211 is one surface of the recess 210 that is separated from the case body 100.

[0077] As can be understood, when the partition member 200 is installed on the inner surface of the case body 100, a recess 210 formed by a part of the partition member 200 recessing outward from the case body 100 is inserted into the communication hole 101, and the first fire-resistant member 300 is installed on the connecting surface 211 of the recess 210 to cover the connecting surface 211, at which time the connecting surface 211 is the outwardly protruding surface of the recess 210, that is, the first fire-resistant member 300 is covered on the outwardly protruding surface of the recess 210. When the partition member 200 is installed on the outer surface of the case body 100, a recess 210 formed by a part of the partition member 200 recessing inward into the case body 100 is inserted into the communication hole 101, and the first fire-resistant member 300 is installed on the connecting surface 211 of the recess 210 to cover the connecting surface 211 of the recess 210. At this time, the connecting surface 211 is the surface on one side of the recess 210 that exhibits an inward recess, that is, the first fire-resistant member 300 is installed on the surface on one side of the recess 210 that exhibits an inward recess.

[0078] With this setup, when thermal runaway occurs in one of the battery cells 20 inside the case body 100, the high-temperature gas generated by the thermal runaway of the battery cell 20 melts through the corresponding recess 210 and is discharged outside the case body 100 through the corresponding communication hole 101. When the discharged high-temperature gas diffuses outside the case body 100, it is blocked by the first fire-resistant member 300 installed in the recess 210 inserted into the other communication hole 101, thereby reducing the risk of thermal runaway diffusion.

[0079] Referring to Figures 6 and 7, in some embodiments, the partition member 200 is installed on the inner surface of the case body 100.

[0080] The partition member 200 may be installed on the inner surface of the case body 100. Specifically, the partition member 200 may be fixed to the inner surface of the case body 100 by applying an adhesive, and the communication hole 101 on the case body 100 on one side of the case body 100 will be sealed, so that impurities such as metal particles from outside the case body 100 cannot enter the inside of the case body 100.

[0081] When installed in this manner, the partition member 200 is placed on the inner surface of the case body 100. The partition member 200 is recessed toward the outside of the case body 100 to form a recess 210, which is then inserted into the corresponding communication hole 101. The first fire-resistant member 300 is placed in the recess 210 inserted into the communication hole 101, and the first fire-resistant member 300 covers one side of the recess 210 that faces outward from the case body 100. At the same time, the other part of the partition member 200 is shielded by the case body 100. This provides a superior protective effect of the first fire-resistant member 300 against the recess 210, effectively reducing the risk of thermal runaway diffusion in the event of thermal runaway in the battery cell 20.

[0082] Referring to Figures 6 and 7, in some embodiments, the partition member 200 includes at least one of a paraffin layer, a plastic layer, and a gelatin layer.

[0083] If thermal runaway occurs in the battery cell 20, the battery cell 20 generates a large amount of hot gas due to the thermal runaway. When the hot gas is ejected and comes into contact with the partition member 200, the partition member 200, which includes at least one of the paraffin layer, plastic layer, and gelatin layer, melts into a liquid phase and falls off. This opens the communication hole 101 sealed by the partition member 200, allowing the hot gas to be discharged to the outside of the case 10 in a timely manner.

[0084] It should be understood that the partition member 200 includes at least one of a paraffin layer, a plastic layer, and a gelatin layer, and the partition member 200 may further include several other types of molten material layers, of which the molten material layer refers to a material layer in which, when the temperature rises to a predetermined value, the crystals are destroyed due to an increase in the kinetic energy of the thermal motion of the molecules, and the material changes from a crystalline phase to a liquid phase.

[0085] In some embodiments, the partition member 200 may include a plastic layer, which may specifically be a low-melting-point plastic, such as polypropylene or polycarbonate. When manufacturing the plastic layer, a flattened rigid plastic sheet is heated to soften it, then adsorbed onto the mold surface under vacuum, cooled, and molded to obtain a plastic layer with a predetermined structural shape. The plastic layer is then bonded and fixed to the inner surface of the case body 100 by applying an adhesive to the bottom of the plastic layer.

[0086] With this setup, if thermal runaway occurs in the battery cell 20 inside the case body 100, the heat generated by the thermal runaway of the battery cell 20 can melt and drip through the partition member 200, thereby allowing the communication hole 101 to communicate with the inside and outside of the case body 100, and the heat generated by the thermal runaway of the battery cell 20 to be discharged through the communication hole 101.

[0087] Referring to Figures 6 and 7, in some embodiments, the case body 100 includes a base plate 110, a communication hole 101 is provided in the base plate 110, a partition member 200 is installed on the surface of the base plate 110 adjacent to the battery cell 20, and the explosion-proof valve 24 of the battery cell 20 faces the partition member 200.

[0088] The base plate 110 is the base structure of the case body 100, and as can be understood, when the battery cells 20 are assembled inside the case body 100, the base plate 110 can be used to support the battery cells 20.

[0089] Communication holes 101 are provided in the base plate 110, and selectively, the communication holes 101 may be arranged in an array on the base plate 110, or the communication holes 101 may be arranged in the base plate 110 along any one direction and at intervals, or the communication holes 101 may be arranged in the base plate 110 at intervals in multiple directions, or the communication holes 101 may be irregularly distributed on the base plate 110.

[0090] As can be understood, the battery cell 20 is assembled inside the case body 100, and the explosion-proof valve 24 of the battery cell 20 faces the partition member 200. When thermal runaway occurs in the battery cell 20, a large amount of hot gas generated by the thermal runaway is ejected from the explosion-proof valve 24 of the battery cell 20 toward the partition member 200, allowing the partition member 200 to melt down quickly, that is, the communication hole 101 to be opened in a timely manner, thereby allowing the hot gas to be discharged from the communication hole 101 in a timely manner.

[0091] Selectively, the explosion-proof valve 24 of the battery cell 20 can be directed specifically towards the recess 210, and when thermal runaway occurs in the battery cell 20, the explosion-proof valve 24 of the battery cell 20 can eject hot gas toward the recess 210, causing the recess 210 to melt rapidly, thereby allowing the hot gas to be ejected out of the case body 100 toward the communication hole 101, effectively improving the efficiency of hot gas discharge from the case body 100 and effectively reducing the risk of heat buildup inside the case 10.

[0092] Referring to Figures 6 to 8, in some embodiments, a base plate 110 has a plurality of communication holes 101, and at least some of the communication holes 101 are spaced apart along a first direction D of the base plate 110 to form a hole set 102, and one or more sets of hole sets 102 are formed in the base plate 110, and if there are at least two sets of hole sets 102, the hole sets 102 are spaced apart along a second direction H of the base plate 110, and the first direction D and the second direction H intersect.

[0093] As can be understood, the first direction D and the second direction H of the base plate 110 intersect, and optionally, the first direction D and the second direction H may be perpendicular to each other. For example, the first direction D may be the length direction of the base plate 110, and the second direction H may be the width direction of the base plate. Specifically, the first direction D of the base plate 110 may be direction D in Figure 7, and the second direction H of the base plate 110 may specifically be direction H in Figure 7.

[0094] The hole set 102 is a collection of a row of communication holes 101 spaced apart along the first direction D of the base plate 110. When the battery cells 20 are assembled in the case body 100, the battery cells 20 may be positioned and installed along the first direction D of the base plate 110, and the large surfaces between adjacent battery cells 20 may be facing each other. In this way, each explosion-proof valve 24 of each battery cell 20 may be installed corresponding to one communication hole 101, and when thermal runaway occurs in any one of the battery cells 20, that battery cell 20 can eject hot gas through the explosion-proof valve 24 into the partition member 200 covered by the corresponding communication hole 101, thereby meeting the need to address thermal runaway in any one of the battery cells 20.

[0095] The number of hole sets 102 may be multiple sets, and in this case, the multiple sets of hole sets 102 may be spaced apart along the second direction H of the base plate 110. As shown in Figure 7, Figure 7 is a schematic diagram of the internal structure of the case body 100 provided in some embodiments of the present application, showing multiple sets of hole sets 102 sealed by partition members 200 and one set of hole sets 102 not sealed by partition members 200. When the battery cells 20 are assembled inside the case body 100, the battery cells 20 may be arranged and installed along a first direction D of the base plate 110, and the large surfaces between adjacent battery cells 20 may be facing each other. At the same time, the battery cells 20 may be arranged along a second direction H of the base plate 110 to form multiple rows. Specifically, the number of rows formed by the arrangement of battery cells 20 along the first direction D of the base plate 110 may be the same as the number of hole sets 102. In this way, each explosion-proof valve 24 of each battery cell 20 may be installed corresponding to one communication hole 101, thereby meeting the need to address thermal runaway in any one of the battery cells 20.

[0096] Referring to Figures 6 to 8, in some embodiments, the number of partition members 200 is the same as the number of hole sets 102, and each partition member 200 is positioned to seal all the communication holes 101 in the corresponding hole set 102.

[0097] Selectively, when there is one set of hole assemblies 102, there may be only one partition member 200, and the partition member 200 can completely cover the set of hole assemblies 102 such that all the communication holes 101 within the hole assemblies 102 are sealed by the partition member 200.

[0098] When there are multiple sets of hole sets 102, the hole sets 102 in each set are spaced apart along the second direction H of the base plate 110, the number of partition members 200 is multiple and matches the number of hole sets 102, and each partition member 200 can cover the corresponding hole set 102 so that each partition member 200 can seal all the communication holes 101 in the corresponding hole set 102.

[0099] With this setup, when thermal runaway occurs in any one of the battery cells 20 inside the case body 100, the high-temperature gas discharged from the explosion-proof valve 24 of the battery cell 20 can melt through the corresponding partition member, thereby allowing the corresponding communication hole 101 of the corresponding hole assembly 102 to conduct electricity and discharge the high-temperature gas. The probability of the partition members 200 covering the other hole assembly 102 melting through is relatively low, allowing the partition members 200 covering the other hole assembly 102 to continue to be used. Only one partition member 200 corresponding to the battery cell 20 that experienced thermal runaway needs to be replaced, effectively reducing costs.

[0100] Referring to Figures 2, 6, and 7, in some embodiments, the case 10 further includes a bottom guard plate 400, which is installed on the outside of the base plate 110, and an exhaust passage 410 is formed between the bottom guard plate 400 and the base plate 110 with a gap between them, the exhaust passage 410 is in communication with the outside of the bottom guard plate 400, and the communication hole 101 is in communication with the exhaust passage 410.

[0101] As can be understood, the bottom guard plate 400 is installed on the outside of the base plate 110 and is used to protect the base plate 110.

[0102] The bottom guard plate 400 may be assembled by fixing it to the base plate 110 with fastening members, and an exhaust passage 410 is formed with a gap between the bottom guard plate 400 and the base plate 110, and the gap between the bottom guard plate 400 and the base plate 110 may communicate with the outside of the bottom guard plate 400 and the base plate 110, and when thermal runaway occurs in the battery cell 20 inside the case body 100, the high temperature gas generated by the thermal runaway melts through the communication hole 101 and is discharged from the communication hole 101, and the high temperature gas discharged from the communication hole 101 can be discharged outside the bottom guard plate 400 through the exhaust passage 410, and the bottom guard plate 400 can protect the base plate 110, so the bottom guard plate 400 effectively ensures that the degree of obstruction to the discharge of high temperature gas from the communication hole 101 is relatively low and the probability of high temperature gas accumulating inside the case body 100 is relatively low.

[0103] Specifically, when thermal runaway occurs in the battery cell 20, the high-temperature gas discharged from the battery cell 20 is discharged into the exhaust passage 410 through the corresponding communication hole 101. At this time, the high-temperature gas diffuses to other communication holes 101, and the first fire-resistant member 300 installed on one side of the recess 210 facing outward from the case body 100 can prevent contact between the high-temperature gas and the recess 210. This reduces the probability that the high-temperature gas melts down to other communication holes 101 and comes into contact with other battery cells 20 that are not experiencing thermal runaway, and further reduces the probability of thermal runaway diffusion.

[0104] With this setup, an exhaust passage 410 is formed with a gap between the bottom guard plate 400 and the base plate 110. If thermal runaway occurs in the battery cell 20 inside the case 10, the high-temperature gas generated by the thermal runaway of the battery cell 20 melts through the partition member 200 that seals the communication hole 101. As a result, the high-temperature gas is discharged from the communication hole 101 into the exhaust passage 410, and further discharged outside the bottom guard plate 400 via the exhaust passage 410.

[0105] Referring to Figure 6, in some embodiments, a second fire-resistant member 500 is installed on one side of the bottom guard plate 400 facing the base plate 110.

[0106] The second fire-resistant member 500 is used to reduce the risk of the bottom guard plate 400 burning when high-temperature gas is discharged from the communication hole 101 to the exhaust passage 410. The second fire-resistant member 500 may be a structural member having a fire-resistant effect, such as a fire-resistant coating, fire-resistant patch, or fire-resistant tape. The second fire-resistant member 500 may be fixed to the bottom guard plate 400 by methods such as coating or adhesive.

[0107] With this setup, if thermal runaway occurs, the second fire protection member 500 can protect the bottom guard plate 400 when high-temperature gas is discharged from inside the case body 100 through the communication hole 101 to the exhaust passage 410, thereby reducing the probability that the bottom guard plate 400 will be damaged by the high-temperature gas.

[0108] Referring to Figures 6 to 8, in some embodiments, the partition member 200 includes a partition portion 220 and an enclosure portion 230, the partition portion 220 being installed on the inner surface of the case body 100 and used to seal at least partially the communication hole 101, and the enclosure portion 230 being installed on one side of the partition portion 220 facing inward into the case body 100.

[0109] Of these, the partition portion 220 is attached to the inner surface of the case body 100 and used to seal the communication hole 101. The partition portion 220 may be a block structure, a sheet structure, or a plate structure, but is not limited to these.

[0110] The enclosure portion 230 is installed on one side of the partition portion 220 facing into the case body 100. The enclosure portion 230 is used to surround the one side of the partition portion 220 facing into the case body 100. When the adhesive application process is carried out inside the case body 100, the enclosure portion 230 can prevent the adhesive from entering the area surrounded by the enclosure portion 230, reducing the probability that the partition 220 will be covered with adhesive, and further reducing the probability that the high-temperature gas from the adhesive will not melt the partition portion 220.

[0111] Specifically, the enclosure portion 230 may be 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., but is not limited to these. The enclosure portion 230 may be assembled by fixing it to the surface of the partition portion 220, or the enclosure portion 230 may be integrally molded with the partition portion 220.

[0112] With this setup, the partition portion 220 of the partition member 200 can be used to seal the communication hole 101, and the enclosure portion 230 of the partition member 200 can act as an enclosure, preventing adhesive from entering the enclosure portion 230 when adhesive is applied to the case body 100, reducing the probability that high-temperature gas cannot melt and run down the partition portion 220 by covering it with adhesive, and at the same time reducing the probability that the adhesive will come into contact with the explosion-proof valve 24 of the battery cell 20, further reducing the probability of the explosion-proof valve 24 failing.

[0113] Referring to Figures 6 to 8, in some embodiments, the projection of the enclosure portion 230 in the thickness direction M of the partition portion 220 is arranged to surround the projection of the explosion-proof valve 24 of the battery cell 20.

[0114] As can be understood, the enclosure portion 230 can act as a barrier for the explosion-proof valve 24 of the battery cell 20 in the thickness direction M of the partition portion 220, and when adhesive is applied to the inner surface of the case body 100, the enclosure portion 230 can act as a barrier for the adhesive, thereby preventing the adhesive from flowing into the partition portion 220, reducing the probability of the adhesive coming into contact with 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 adhesive and malfunctioning.

[0115] Referring to Figures 6 to 8, in some embodiments, the enclosure 230 includes two opposing first enclosure structures 231 and two opposing second enclosure structures 232, both of which are installed in the partition 220, with the opposing ends of the first enclosure structure 231 each connected to the two second enclosure structures 232, and the height of the first enclosure structure 231 being less than the height of the second enclosure structures 232.

[0116] Of these, the first enclosure structure 231 may be an enclosure plate, enclosure rod, enclosure block, etc., but is not limited thereto. Similarly, the second enclosure structure 232 may be an enclosure plate, enclosure rod, enclosure block, etc., but is not limited thereto. The first enclosure structure 231 and the second enclosure structure 232 are connected in sequence to form an enclosure section 230 and serve as an enclosure for the partition section 220.

[0117] When the battery cell 20 is assembled inside the case body 100, the battery cell 20 is placed on the inner surface of the case body 100 and presses against the enclosure 230. Since the height of the first enclosure structure 231 is smaller than the height of the second enclosure structure 232, the width over which the first enclosure structure 231 is pressed against the battery cell 20 is relatively small, or the first enclosure structure 231 is not pressed against the battery cell 20 at all. Therefore, the reaction force of the first enclosure structure 231 against the battery cell 20 is relatively small or nonexistent. Consequently, the reaction force of the enclosure 230 against the battery cell 20 is relatively smaller, thereby reducing the probability of the battery cell 20 bouncing up.

[0118] Exemplary, in some specific embodiments, the base plate 110 of the case body 100 has a plurality of communication holes 101, the plurality of communication holes 101 are spaced apart along the width of the base plate 110 to form a plurality of hole sets 102, the partition members 200 have a strip-like structure, the number of partition members 200 corresponds to the number of hole sets 102, the length of each partition member 200 is arranged along the length of the base plate 110, and each partition member 200 can seal all the communication holes 101 included in the corresponding hole set 102, each partition Multiple recesses 210 are formed in the member 200, each recess 210 is inserted into a corresponding communication hole 101, and a fire-resistant coating is applied to one surface of each recess 210 facing outwards from the case body 100. A bottom guard plate 400 is further installed outside the case body 100, and the bottom guard plate 400 is assembled to the outer surface of the base plate 110 of the case body 100 by fastening members, and an exhaust passage 410 is formed with a gap between it and the outer surface of the base plate 110, and each communication hole 101 communicates with the exhaust passage 410. The partition member 200 includes a strip-shaped partition sheet and an enclosure portion 230 integrally formed on one side of the partition sheet facing into the case body 100, wherein the enclosure portion 230 includes two first enclosure structures 231 and two second enclosure structures 232, the two first enclosure structures 231 each located on the short sides of the partition sheet and the two second enclosure structures 232 each located on the long sides of the partition sheet, and the first enclosure structures 231 and the second enclosure structures 232 are sequentially connected.When the battery cells 20 are assembled inside the case body 100, the battery cells 20 can be arranged sequentially along the length of the base plate 110, so that the explosion-proof valves 24 of the battery cells 20 in the same row can be installed in a one-to-one correspondence with each recess 210 of the corresponding partition member 200. At the same time, in the battery cells 20 in the same row, each battery cell 20 presses only against the second enclosure structure 232, and the height of the first enclosure structure 231 is smaller than that of the second enclosure structure 232, so that the leading and trailing battery cells 20 in the same row do not press against the first enclosure structure 231. As a result, the first enclosure structure 231 does not apply a reaction force to the leading and trailing battery cells 20 in the same row, effectively reducing the reaction force received by the leading and trailing battery cells 20 in the same row, ensuring the stability of the assembly of the battery cells 20, and preventing the battery cells 20 from bouncing up.

[0119] Referring to Figure 2, in a second embodiment, the present invention further provides a battery 1100 comprising a battery cell 20 and the case 10, wherein the battery cell 20 is installed in the case body 100 of the case 10.

[0120] The battery 1100 provided by the embodiment of the present invention includes the case 10, and the case 10, by sealing the communication hole 101 using the partition member 200, reduces the probability that metal particles from outside the case body 100 will enter the case body 100 and cause insulation failure, thus the probability of insulation failure in the battery 1100 is also relatively low.

[0121] Referring to Figures 2, 6, and 7, in some embodiments, there are multiple battery cells 20, which are housed within the case body 100, and the explosion-proof valve 24 of each battery cell 20 faces a corresponding communication hole 101 opened in the case body 100.

[0122] As can be understood, each battery cell 20 has an explosion-proof valve 24 directed toward a corresponding communication hole 101 opened in the case body 100, and the communication hole 101 is sealed by a partition member 200. When thermal runaway occurs in any one of the battery cells 20, the explosion-proof valve 24 of the battery cell 20 ejects hot gas toward the communication hole 101. After the hot gas comes into contact with the partition member 200, the partition member 200 can quickly melt and fall off, thereby allowing the hot gas to be discharged out of the case body 100 through the communication hole 101 in a timely manner, reducing the probability of hot gas accumulating inside the case body 100 and causing a risk of combustion or explosion.

[0123] Referring to Figure 1, in a third embodiment, the embodiment of the present application further provides an electrical device including the above-mentioned battery.

[0124] As is to be understood, the electrical device may be, but is not limited to, a mobile phone, computer, toy, electric vehicle, ship, aerospace, etc. In some specific embodiments, the electrical device may be a vehicle 1000, and the battery 1100 may be used to provide electrical energy to the vehicle 1000.

[0125] The electrical equipment provided by the embodiment of the present invention includes the battery 1100, and based on the relatively low probability of insulation failure occurring in the battery 1100, the probability of leakage current in the electrical equipment is also lower.

[0126] The above is merely a relatively good embodiment of the present application and is not intended to limit the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the claims of the embodiments of the present application, as long as they do not deviate from the spirit and principles of the embodiments of the present application, should all be included in the claims of the embodiments of the present application. [Explanation of Symbols]

[0127] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 10. Case; 11. Part 1; 12. Part 2; 20. Battery cell; 21. End cap; 21a. Electrode terminal; 22. Casing; 23. Battery core assembly; 23a. Tab; 24. Explosion-proof valve; 100, Case body; 101, Communication hole; 102, Hole assembly; 110, Base plate; 200, partition member; 210, recess; 211, connecting surface; 220, partition section; 230, enclosure section; 231, first enclosure structure; 232, second enclosure structure; 300, First fire-resistant component; 400, bottom guard plate; 410, exhaust passage; 500, Second fire-resistant component; D, first direction; H, second direction; M, thickness direction.

Claims

1. A case for housing a battery cell, wherein the case is The case body from which the communication holes are made, A partition member installed in the case body and sealing the communication hole, Includes, The partition member is configured to melt and fall off in the event of thermal runaway in the battery cell, case.

2. A portion of the partition member is recessed toward the case body to form a recess, and the recess is inserted into the communication hole. The case described in claim 1.

3. The case further includes a first fire-resistant member, the recess has a connecting surface that is installed facing the case body, and the first fire-resistant member is installed on the connecting surface. The case described in claim 2.

4. The partition member is characterized by being installed on the inner surface of the case body. The case described in claim 1.

5. The partition member is characterized by comprising at least one of a paraffin layer, a plastic layer, and a gelatin layer. The case described in claim 1.

6. The aforementioned case body includes a base plate, The communication holes are provided in the base plate, the partition member is installed on the surface of the base plate adjacent to the battery cell, and the explosion-proof valve of the battery cell faces the partition member. The case described in claim 1.

7. The base plate is provided with a plurality of communication holes, at least some of which are spaced apart along a first direction of the base plate to form a set of holes, and one or more sets of the set of holes are formed in the base plate, and if there are at least two sets of the set of holes, the set of holes is spaced apart along a second direction of the base plate, and the first direction and the second direction intersect. The case described in claim 6.

8. The number of partition members is the same as the number of hole sets, and each partition member is arranged to seal all of the communication holes in the corresponding hole set. The case described in claim 7.

9. The case further includes a bottom guard plate, the bottom guard plate is installed on the outside of the base plate, an exhaust passage is formed between the bottom guard plate and the base plate with a gap between them, the exhaust passage communicates with the outside of the bottom guard plate, and the communication hole communicates with the exhaust passage. The case described in claim 6.

10. A second fire-resistant member is installed on one side of the bottom guard plate facing the base plate. The case described in claim 9.

11. The partition member is characterized by including a partition portion installed on the inner surface of the case body and used to seal the communication hole at least partially, and an enclosure portion installed on one side of the partition portion facing into the case body. The case described in claim 6.

12. In the thickness direction of the partition portion, the projection of the enclosure portion is arranged to surround the projection of the explosion-proof valve of the battery cell. The case described in claim 11.

13. The enclosure comprises two first enclosure structures and two second enclosure structures installed opposite each other, both of which are installed in the partition section, and the opposing ends of the first enclosure structure are each connected to the two second enclosure structures, and the height of the first enclosure structure is less than the height of the second enclosure structure. The case described in claim 12.

14. A battery comprising a battery cell and a case according to any one of claims 1 to 13, characterized in that the battery cell is installed inside the case body of the case. battery.

15. The number of the battery cells is multiple, the multiple battery cells are housed within the case body, and the explosion-proof valve of each battery cell faces a corresponding communication hole opened in the case body. The battery according to claim 14.

16. A battery comprising the battery described in claim 14, Electrical equipment.

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