Base plate, battery casing, battery, and electrical device

Abstract

This application discloses a base plate, a battery housing, a battery, and an electrical device. The base plate includes a support plate with multiple venting chambers and multiple venting holes. The venting holes are arranged opposite to multiple battery cells, and each venting hole communicates with at least one venting chamber. The support plate also has an overflow cavity and an overflow hole. The overflow cavity is spaced apart from the venting chambers, and the overflow hole is spaced apart from the venting holes and communicates with the overflow cavity. In the technical solution of this application embodiment, excess glue between the base plate and the battery cells can flow into the overflow cavity through the overflow hole, reducing the probability of glue blocking the venting holes. When a battery cell experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the venting chamber through the venting hole for depressurization, reducing the risk of battery cell combustion and explosion, and improving the safety and stability of the battery.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a base plate, a battery housing, a battery, and an electrical device. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] In related technologies, the bottom of the battery cell cannot vent well, which can easily lead to combustion and explosion when thermal runaway occurs, seriously affecting the safety and stability of the battery. Summary of the Invention

[0004] In view of the above problems, this application provides a base plate, a battery housing, a battery, and an electrical device. The base plate can effectively vent air, thereby improving the safety and stability of the battery.

[0005] In a first aspect, this application provides a base plate, including a support plate, the support plate having a plurality of venting chambers and a plurality of venting holes, the plurality of venting holes being arranged opposite to a plurality of battery cells of a battery and each venting hole communicating with at least one of the venting chambers; wherein, the support plate further has an overflow cavity and an overflow hole, the overflow cavity being arranged separately from the venting chambers, and the overflow hole being arranged spaced apart from the venting holes and communicating with the overflow cavity.

[0006] In the technical solution of this application embodiment, by setting an overflow hole and an overflow cavity on the base plate, excess glue between the base plate and the battery cell can flow from the overflow hole into the overflow cavity, reducing the probability of glue blocking the vent hole. When the battery cell experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity through the vent hole to relieve pressure, reducing the risk of the battery cell burning and exploding, and improving the safety and stability of the battery.

[0007] In some embodiments, the plurality of vent holes are divided into a plurality of vent hole groups, which are arranged in a first direction. Each vent hole group includes a plurality of vent holes, and the plurality of vent holes in each vent hole group are arranged in a second direction. The projection of at least one overflow hole onto a plane perpendicular to the first direction is located between the projections of two adjacent vent holes in the vent hole group onto that plane. Since the vent holes are arranged opposite to the battery cells, the overflow holes are spaced apart from the vent holes in the second direction, thus offsetting the overflow holes from the battery cells. This relative arrangement of the overflow holes and the spaces between adjacent battery cells allows excess glue between the battery cells and the base plate to enter the overflow cavity under the guidance of the overflow holes, reducing the probability of glue blocking the vent holes, lowering the risk of battery cell combustion and explosion, and improving the safety and stability of the battery.

[0008] In some embodiments, at least one of the overflow holes is located between two adjacent groups of vent holes. In the above technical solution, on the one hand, the distance between the overflow hole and the vent hole in the first direction can be increased, improving the structural strength of the base plate; on the other hand, the flow of adhesive can be directionally guided, increasing the adhesive application area of ​​the base plate and causing the adhesive to diffuse away from the vent hole, reducing the probability of adhesive clogging the vent hole and improving the safety and stability of the battery.

[0009] In some embodiments, the number of overflow holes is multiple and divided into multiple overflow hole groups. These multiple overflow hole groups and multiple vent hole groups are alternately arranged in the first direction, and each overflow hole group includes at least one overflow hole. This arrangement allows the multiple overflow holes to be distributed evenly on the support plate, resulting in a more uniform coating of adhesive on the bonding area of ​​the support plate. This not only increases the adhesive coating area of ​​the support plate and improves the connection reliability between the support plate and the multiple battery cells, but also reduces the probability of adhesive blocking the vent holes, lowering the risk of battery cell combustion and explosion, and improving the safety and stability of the battery.

[0010] In some embodiments, a plurality of exhaust chambers are arranged in the second direction and each exhaust chamber extends along the first direction, and a plurality of exhaust holes in each exhaust hole group are connected to a plurality of exhaust chambers in a one-to-one correspondence; the overflow cavity extends along the first direction and is located between two adjacent exhaust chambers. Since the plurality of exhaust holes in each exhaust hole group are arranged in the second direction and each exhaust chamber extends along the first direction, the arrangement direction of the plurality of exhaust holes in each exhaust hole group intersects with the extension direction of the exhaust chamber. Compared with the technical solution where the arrangement direction of the plurality of exhaust holes in each exhaust hole group is consistent with the extension direction of the exhaust chamber, this has the following beneficial technical effects. Regarding the exhaust holes, in the second direction, any two adjacent exhaust holes are separated by a partition, which is the partition between two adjacent exhaust chambers in the second direction. The partition can support the planar layer structure where the exhaust holes are located, improving the structural strength of the planar layer structure, thereby improving the overall structural strength of the support plate. Regarding the exhaust chamber, in the first direction, the planar layer structure above the exhaust chamber is divided into multiple alternating segments: a first segment and a second segment. Exhaust holes can be provided on the first segment, while the second segment can be equipped with overflow holes or be a completely non-porous structure as needed. This utilizes the planar layer structure above the exhaust chamber to reinforce the structural strength of the planar layer containing the exhaust chamber, thereby improving the overall structural strength of the support plate. Therefore, in the above technical solution, the problem of weak local structural strength in the support plate can be reduced, the overall structural strength of the support plate can be improved, and the deformation resistance of the support plate can be enhanced, thereby improving the reliability of the base plate.

[0011] In some embodiments, the number of overflow cavities is multiple, and the multiple overflow cavities are arranged in the second direction. At least one overflow cavity is connected to the overflow hole, and the multiple overflow cavities and the multiple venting cavities are alternately arranged in the second direction. In the above technical solution, by setting multiple overflow cavities, overflow holes can be formed on the support plate as needed, and at least one overflow cavity is connected to the overflow hole. The design is more flexible and can meet different needs. Since the overflow hole can guide the flow of glue in a specific direction, it increases the glue coating area of ​​the base plate. Excess glue flows into the overflow cavity, reducing the probability of glue blocking the venting hole, reducing the risk of battery cell combustion and explosion, and improving the safety and stability of battery use. Since the overflow cavity can hold excess glue, the glue in the overflow cavity can also increase the structural strength of the support plate after curing, improve the deformation resistance of the support plate, and thus improve the reliability of the base plate.

[0012] In some embodiments, the upper surface of the support plate is provided with a plurality of blocking portions, each of which corresponds one-to-one with a plurality of vent hole groups. Each blocking portion includes two protrusions arranged opposite each other in the first direction, each protrusion extending along the second direction, and a plurality of vent holes in each vent hole group located between the two protrusions in the corresponding blocking portion. In the above technical solution, by providing blocking portions, on the one hand, the structural strength of the support plate can be increased, improving its resistance to deformation and thus enhancing the reliability of the base plate. On the other hand, it can separate the vent holes and the overflow holes, preventing interference between the venting space and the overflow space. The blocking portions can prevent adhesive between the battery cell and the base plate from entering the vent holes, instead allowing excess adhesive between two adjacent blocking portions to flow from the overflow hole into the overflow cavity, reducing the probability of adhesive blocking the vent holes. Even if the battery cell experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity through the vent hole for depressurization, reducing the risk of battery cell combustion and explosion, and improving the safety and stability of the battery.

[0013] In some embodiments, the number of support plates is one, or the number of support plates is multiple and the multiple support plates are arranged side by side in the second direction. The number of support plates can be selected according to the number and arrangement of battery cells, making the design more flexible.

[0014] In some embodiments, the support plate includes: a first plate portion and a second plate portion, the first plate portion being disposed above the second plate portion; and a plurality of partition portions disposed between the first plate portion and the second plate portion to divide the space between the first plate portion and the second plate portion into a plurality of venting chambers and overflow chambers, the venting holes and overflow holes penetrating through the first plate portion. In the above technical solution, the partition portions not only separate the venting chambers and overflow chambers, preventing them from interfering with each other, but also provide support for the first plate portion, which helps to improve the structural strength of the support plate, thereby improving the structural strength of the base plate.

[0015] In some embodiments, the support plate is a one-piece molded part. One-piece molding of the support plate eliminates unnecessary connecting structures, simplifies the manufacturing process, and improves the production efficiency of the base plate. Furthermore, it enhances the overall performance of the support plate, increases its structural strength, and improves its resistance to deformation, thereby increasing the reliability of the base plate.

[0016] In some embodiments, the cross-sectional area of ​​the glue overflow chamber is smaller than the cross-sectional area of ​​the venting chamber. This arrangement allows the support plate to both store excess glue and improve venting performance, while also maintaining the structural strength of the support plate after the glue has cured, thereby enhancing the reliability of the base plate.

[0017] Secondly, this application provides a battery housing, which includes the base plate described in the above embodiments.

[0018] In the technical solution of this application embodiment, by adopting the above-mentioned base plate, excess glue between the base plate and the battery cell can flow into the glue overflow cavity through the glue overflow hole, reducing the probability of glue blocking the vent hole. When the battery cell experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity through the vent hole to relieve pressure, reducing the risk of the battery cell burning and exploding, and improving the safety and stability of the battery.

[0019] Thirdly, this application provides a battery comprising: a housing, wherein the housing is the housing of the battery described in the above embodiments; a plurality of battery cells disposed within the housing, wherein the bottom of each battery cell is bonded to the upper surface of the base plate by adhesive; and a plurality of vent holes being located directly below the plurality of battery cells and being disposed opposite to the explosion-proof valve on the corresponding battery cell.

[0020] In the technical solution of this application embodiment, by adopting the battery casing described above, excess glue between the base plate and the battery cell can flow into the glue overflow cavity through the glue overflow hole, reducing the probability of glue blocking the vent hole. When the battery cell experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity through the vent hole to relieve pressure, reducing the risk of the battery cell burning and exploding, and improving the safety and stability of the battery.

[0021] In some embodiments, at least a portion of the overflow hole is located directly below the space between two adjacent battery cells, allowing excess adhesive between the battery cell and the base plate to bypass the vent and be guided into the overflow cavity through the overflow hole. This reduces the probability of adhesive blocking the vent, lowers the risk of battery cell combustion or explosion, and improves the safety and stability of the battery.

[0022] In some embodiments, multiple battery cells form multiple battery packs, which are arranged in a first direction. Each battery pack includes multiple battery cells, and the multiple battery cells in each battery pack are arranged in a second direction. At least one overflow hole is located between two adjacent battery cells in the battery pack. In the above technical solution, by arranging multiple batteries in an orderly manner on a base plate and, depending on the situation, providing an overflow hole directly below the space between two adjacent battery cells in the battery pack, excess adhesive between the base plate and the battery cells can be guided to flow in a directional manner, increasing the adhesive application area of ​​the base plate and causing the adhesive to diffuse away from the vent hole, reducing the probability of adhesive blocking the vent hole, and improving the safety and stability of the battery.

[0023] In some embodiments, the first direction and the second direction are perpendicular to each other and both perpendicular to the thickness direction of the base plate, wherein the second direction is the thickness direction of the battery cell. In the above technical solution, the multiple battery cells are arranged more compactly, and each battery cell can be bonded to the base plate, improving the installation reliability of each battery cell and thus improving the reliability of the battery in use.

[0024] In some embodiments, a liquid cooling plate is provided between any two adjacent battery cells in the battery pack, and at least one of the overflow holes is located directly below the liquid cooling plate. By providing a liquid cooling plate between two adjacent battery cells, heat exchange can be performed between the liquid cooling plate and the battery cells, carrying away the heat generated by the battery cells during operation, thereby cooling the battery cells and reducing damage caused by excessive temperature.

[0025] In some embodiments, multiple battery cells in multiple battery packs are arranged facing each other in the first direction, and multiple liquid cooling plates in multiple battery packs are arranged facing each other one-to-one in the first direction, with the multiple liquid cooling plates arranged facing each other in multiple battery packs forming an integral structure. In the above technical solution, by making the multiple liquid cooling plates arranged facing each other in multiple battery packs an integral structure, on the one hand, the connection structure of the multiple liquid cooling plates arranged facing each other can be eliminated, simplifying the connection steps between the liquid cooling plates and multiple battery cells, which is beneficial to improving the connection efficiency between the liquid cooling plates and multiple battery cells; on the other hand, connecting the same liquid cooling plate to multiple battery cells is equivalent to connecting multiple battery cells together, which can further improve the installation reliability of multiple battery cells and make the overall battery performance better.

[0026] Fourthly, this application provides an electrical device that includes the battery described in the above embodiments.

[0027] In the technical solution of this application embodiment, by using the above-mentioned battery, the safety and stability of the electrical device can be improved.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0030] Figure 1 This is a schematic diagram of the structure of an electrical device according to some embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the battery structure according to some embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the structure of a battery cell according to some embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the structure of the base plate in some embodiments of this application;

[0034] Figure 5 This is a schematic diagram of the structure of the support plate of the base plate in some embodiments of this application;

[0035] Figure 6 for Figure 5 Side view of the support plate shown;

[0036] Figure 7 for Figure 6 A partial enlarged view of the support plate shown;

[0037] Figure 8 This is a schematic diagram of the battery structure according to some embodiments of this application;

[0038] Figure 9 for Figure 8 A partial enlarged view of the battery shown;

[0039] Figure 10 for Figure 8 A magnified view of a portion of the battery shown.

[0040] The reference numerals in the detailed embodiments are as follows:

[0041] 1000 electrical appliances

[0042] Battery 100, casing 101, first part 1011, second part 1012.

[0043] Base plate 11,

[0044] Exhaust chamber 1101, exhaust port 1102, exhaust port assembly 1103.

[0045] Glue overflow cavity 1104, glue overflow hole 1105, glue overflow hole assembly 1106.

[0046] Support plate 111, first plate portion 1111, second plate portion 1112, partition portion 1113, blocking portion 112, protrusion 1121, adhesive layer 12.

[0047] Controller 200, Motor 300

[0048] First direction X, second direction Y, third direction Z.

[0049] Battery cell 40, casing 41, casing cover 411, casing body 412, cell assembly 42, tabs 421, electrode terminals 43.

[0050] Liquid cooling plate 50, battery pack 60. Detailed Implementation

[0051] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0053] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0054] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0055] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0057] In the description of the embodiments of this application, the technical terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0058] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0059] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0060] For ordinary batteries, during battery use or energy storage, abnormal factors such as weather, aging, and overcharging often cause thermal runaway in individual battery cells, resulting in a large amount of thermal runaway fumes. These fumes contain a large amount of flammable gases and substances. Therefore, in order to reduce the risk of battery use, an exhaust structure is installed on the bottom plate of the battery cell to exhaust the fumes.

[0061] In related technologies, the venting structure on the battery base plate is prone to blockage, resulting in poor venting. When a battery cell experiences thermal runaway, it is prone to combustion, and may even cause the battery cell to explode, affecting the safety and stability of the battery cell during use.

[0062] To improve the safety and stability of the battery, this application provides an overflow cavity and an overflow hole on the bottom plate of the battery cell. During battery assembly, excess glue between the bottom plate and the battery cell will enter the overflow cavity through the overflow hole, reducing the probability of glue entering the vent hole and blocking the vent hole after curing. Even if the battery cell experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity through the vent hole to relieve pressure, reducing the risk of the battery cell burning or exploding, and improving the safety and stability of the battery.

[0063] The battery disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0064] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0065] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is installed inside the vehicle, and the battery 100 can be located at the bottom, front, or rear of the vehicle. The battery 100 can be used to power the vehicle; for example, the battery 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0066] In some embodiments of this application, the battery 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0067] Please refer to Figure 2 , Figure 2This is an exploded view of a battery 100 provided in some embodiments of this application. In the figure, the X direction is the width direction of the battery 100, the Y direction is the length direction of the battery 100, and the Z direction is the height direction of the battery 100. The battery 100 includes a housing 101 and a plurality of battery cells 40, which are housed within the housing 101. The battery 100 may also include other structures; for example, it may include a busbar component for electrical connection between the plurality of battery cells 40.

[0068] Multiple battery cells 40 can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 40 are connected in both series and parallel. Multiple battery cells 40 can be directly connected in series, parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 40 is housed in the housing 101. Of course, the battery 100 can also be composed of multiple battery cells 40 first connected in series, parallel, or in a mixed manner to form a battery 100 module, and then multiple battery 100 modules are connected in series, parallel, or in a mixed manner to form a whole assembly, which is then housed in the housing 101.

[0069] Each battery cell 40 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 40 can be cylindrical, flat, cuboid, or other shapes.

[0070] Please refer to this again. Figure 2 and further refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of a battery cell 40 provided in some embodiments of this application. A battery cell 40 refers to the smallest unit that makes up the battery 100. The battery cell 40 includes a casing 41, a cell assembly 42, and other functional components.

[0071] The housing 41 includes a cover 411 and a body 412. The cover 411 is a component that closes onto the opening of the body 412 to isolate the internal environment of the battery cell 40 from the external environment. The shape of the cover 411 can be adapted to the shape of the body 412 to fit it. Optionally, the cover 411 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the cover 411 is less prone to deformation under pressure and impact, allowing the battery cell 40 to have higher structural strength and improved reliability. Functional components such as electrode terminals 43 can be provided on the cover 411. The electrode terminals 43 can be used for electrical connection with the cell assembly 42 to output or input electrical energy from the battery cell 40. In some embodiments, the cover 411 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 40 reaches a threshold. The material of the cover 411 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating member (not shown in the figure) may be provided on the inner side of the cover 411. The insulating member can be used to isolate the electrical connection components inside the housing 412 from the cover 411 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc. The housing 412 is a component used to cooperate with the cover 411 to form the internal environment of the battery cell 40, wherein the formed internal environment can be used to accommodate the cell assembly 42, electrolyte, and other components. The housing 412 and the cover 411 can be independent components. An opening can be provided on the housing 412, and the cover 411 can be used to close the opening to form the internal environment of the battery cell 40. Alternatively, the cover 411 and the body 412 can be integrated. Specifically, the cover 411 and the body 412 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the body 412, the cover 411 closes the body 412. The body 412 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the body 412 can be determined according to the specific shape and size of the battery cell assembly 42. The material of the body 412 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0072] The cell assembly 42 is the component in the battery cell 40 where the electrochemical reaction occurs. The casing 412 may contain one or more cell assemblies 42. The cell assembly 42 is mainly formed by winding or stacking positive and negative electrode plates, and typically a separator is provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the cell assembly 42, while the portions of the positive and negative electrode plates without active material each constitute a tab 421. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs 421 connect to the electrode terminals 43 to form a current circuit.

[0073] Please refer to this again. Figure 2 The housing 101 is used to provide a space for the battery cell 40, and the housing 101 can adopt various structures.

[0074] In some embodiments, the housing 101 may include a first portion 1011 and a second portion 1012, which overlap each other, and together define a receiving space for accommodating the battery cell 40. The second portion 1012 may be a hollow structure with one open end, and the first portion 1011 may be a plate-like structure, with the first portion 1011 covering the open side of the second portion 1012 so that the first portion 1011 and the second portion 1012 together define the receiving space; alternatively, the first portion 1011 and the second portion 1012 may both be hollow structures with one open side, with the open side of the first portion 1011 covering the open side of the second portion 1012. Of course, the housing 101 formed by the first portion 1011 and the second portion 1012 can be of various shapes, such as a cylinder, a cuboid, etc.

[0075] In some embodiments, the housing 101 of the battery 100 may include a base plate 11, which can be used to support multiple battery cells 40. Please refer to... Figure 4 , Figure 4 This is a schematic diagram of the structure of the base plate 11 in some embodiments of this application. The base plate 11 may include a support plate 111, which has a plurality of vent chambers 1101 and a plurality of vent holes 1102. The plurality of vent holes 1102 are arranged opposite to a plurality of battery cells 40 of the battery 100, and each vent hole 1102 communicates with at least one vent chamber 1101.

[0076] When a battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve (not shown in the figure) of the battery cell 40 can enter the exhaust chamber 1101 through the exhaust port 1102 to relieve pressure, reducing the risk of combustion and explosion of the battery cell 40 and improving the safety and stability of the battery 100. Specifically, the "explosion-proof valve" automatically opens when there is overpressure or excessive temperature inside the battery cell 40, thereby achieving the purpose of explosion prevention.

[0077] The support plate 111 also has an overflow cavity 1104 and an overflow hole 1105. The overflow cavity 1104 and the overflow hole 1105 are connected. The overflow cavity 1104 is arranged separately from the venting cavity 1101, and the overflow hole 1105 is arranged alternately with the venting hole 1102. That is, the overflow space and the venting space do not interfere with each other. When assembling the battery 100, the overflow hole 1105 can guide excess glue between the base plate 11 and the battery cell 40 into the overflow cavity 1104, increasing the glue application area on the base plate 11 and reducing the probability of glue entering the venting hole 1102 and blocking the venting hole 1102 after curing. This allows the venting hole 1102 and the venting cavity 1101 to release pressure normally.

[0078] In the technical solution of this application embodiment, by providing an overflow hole 1105 and an overflow cavity 1104 on the base plate 11, excess glue between the base plate 11 and the battery cell 40 can flow from the overflow hole 1105 into the overflow cavity 1104, reducing the probability of glue blocking the vent hole 1102. When the battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity 1101 through the vent hole 1102 for pressure relief, reducing the risk of the battery cell 40 burning and exploding, and improving the safety and stability of the battery 100.

[0079] Please refer to this again. Figure 4 and further refer to Figure 5 , Figure 5 This is a schematic diagram of the structure of the support plate 111 of the base plate 11 in some embodiments of this application. Multiple vent holes 1102 are divided into multiple vent hole groups 1103. The multiple vent hole groups 1103 are arranged in a first direction, and each vent hole group 1103 includes multiple vent holes 1102. The multiple vent holes 1102 in each vent hole group 1103 are arranged in a second direction, that is, the multiple vent holes 1102 are arranged in both the first and second directions. The first direction is... Figure 4 The X direction is shown in the figure, and the second direction is... Figure 4 The Y direction is shown in the figure.

[0080] On a plane perpendicular to the first direction, the projection of at least one overflow hole 1105 lies between the projections of two adjacent vent holes 1102 in the vent hole group 1103. That is, the overflow hole 1105 and the vent holes 1102 are arranged at intervals in the second direction.

[0081] Since the vent 1102 is positioned opposite to the battery cell 40, the overflow hole 1105 is arranged at a distance from the vent 1102 in the second direction, so that the overflow hole 1105 is staggered from the battery cell 40. In this way, the space between the overflow hole 1105 and two adjacent battery cells 40 is positioned opposite to each other, so that excess glue between the battery cell 40 and the base plate 11 can be guided into the overflow cavity 1104 under the guidance of the overflow hole 1105, reducing the probability of glue blocking the vent 1102, reducing the risk of the battery cell 40 burning and exploding, and improving the safety and stability of the battery 100.

[0082] Based on the arrangement of the overflow hole 1105 and the vent hole 1102 at intervals in the second direction, at least one overflow hole 1105 can be provided between two adjacent vent hole groups 1103, so that the overflow hole 1105 and the vent hole 1102 are arranged at intervals in the first direction.

[0083] In the above technical solution, on the one hand, the distance between the overflow hole 1105 and the vent hole 1102 in the first direction can be increased to improve the structural strength of the base plate 11. On the other hand, the flow of glue can be guided in a direction to increase the glue coating area of ​​the base plate 11 and make the glue diffuse away from the vent hole 1102, thereby reducing the probability of glue blocking the vent hole 1102 and improving the safety and stability of the battery 100.

[0084] Please refer to this again. Figure 5 There are multiple overflow holes 1105. The multiple overflow holes 1105 on the support plate 111 are divided into multiple overflow hole groups 1106. The multiple overflow hole groups 1106 and multiple vent hole groups 1103 are arranged alternately in the first direction.

[0085] Specifically, in the first direction, the two outermost hole groups can be two vent hole groups 1103, and there is one vent hole group 1103 between two adjacent overflow hole groups 1106, and one overflow hole group 1106 between two adjacent vent hole groups 1103.

[0086] This arrangement allows multiple adhesive overflow holes 1105 to be distributed on the support plate 111, making the adhesive coating on the bonding area of ​​the support plate 111 more uniform. This not only increases the adhesive coating area of ​​the support plate 111 and improves the connection reliability between the support plate 111 and the multiple battery cells 40, but also reduces the probability of adhesive blocking the vent holes 1102, lowers the risk of combustion and explosion of the battery cells 40, and improves the safety and stability of the battery 100.

[0087] Each group of adhesive overflow holes 1106 includes at least one adhesive overflow hole 1105. For example, each group of adhesive overflow holes 1106 may include one adhesive overflow hole 1105; or, for instance, each group of adhesive overflow holes 1106 may include multiple adhesive overflow holes 1105, which may be arranged at intervals in the second direction, or the multiple adhesive overflow holes 1105 may be arranged in other discharge methods, which can be set according to the actual situation.

[0088] Please refer to this again. Figure 4 and Figure 5 and further refer to Figure 6 and Figure 7 , Figure 6 for Figure 5 The side view of the support plate 111 shown. Figure 7 for Figure 6 The image shows a partial enlarged view of the support plate 111. Multiple exhaust chambers 1101 are arranged in a second direction, each exhaust chamber 1101 extending along a first direction, and multiple exhaust holes 1102 in each exhaust hole group 1103 are connected to the multiple exhaust chambers 1101 in a one-to-one correspondence.

[0089] In other words, the arrangement direction of the multiple exhaust holes 1102 in each exhaust hole group 1103 is intersected with the extension direction of the exhaust chamber 1101. The number of exhaust chambers 1101 is equal to the number of exhaust holes 1102 in each exhaust hole group 1103. The multiple exhaust holes 1102 in each exhaust hole group 1103 and the multiple exhaust chambers 1101 can be arranged one-to-one and connected accordingly, so that each exhaust chamber 1101 is connected to one exhaust hole 1102 in the multiple exhaust hole groups 1103.

[0090] Since the multiple exhaust holes 1102 in each exhaust hole group 1103 are arranged in the second direction, and each exhaust cavity 1101 extends along the first direction, the arrangement direction of the multiple exhaust holes 1102 in each exhaust hole group 1103 is intersected with the extension direction of the exhaust cavity 1101. Compared with the technical solution where the arrangement direction of the multiple exhaust holes 1102 in each exhaust hole group 1103 is consistent with the extension direction of the exhaust cavity 1101, it has the following beneficial technical effects.

[0091] Regarding the exhaust port 1102, in the second direction, any two adjacent exhaust ports 1102 are provided with a partition 1113. The partition 1113 is the partition between two adjacent exhaust chambers 1101 in the second direction. The partition 1113 can support the planar layer structure where the exhaust port 1102 is located, thereby improving the structural strength of the planar layer structure and thus improving the overall structural strength of the support plate 111.

[0092] Regarding the exhaust chamber 1101, in the first direction, the planar layer structure above the exhaust chamber 1101 is divided into multiple alternating first and second layer structures. The first layer structure can be provided with exhaust holes 1102, while the second layer structure can be provided with overflow holes 1105 or be a complete non-porous structure as needed. In this way, the planar layer structure above the exhaust chamber 1101 is used to strengthen the structural strength of the planar layer where the exhaust chamber 1101 is located, thereby improving the overall structural strength of the support plate 111.

[0093] Therefore, the above technical solution can reduce the problem of weak local structural strength of the support plate 111, improve the overall structural strength of the support plate 111, improve the deformation resistance of the support plate 111, and thereby improve the reliability of the base plate 11.

[0094] The overflow cavity 1104 extends along the first direction and is located between two adjacent exhaust cavities 1101, effectively utilizing the internal space of the support plate 111 and improving the space utilization rate inside the support plate 111.

[0095] To prevent glue from flowing out of the glue overflow cavity 1104, end plates can be provided at both ends of the support plate 111 in the first direction to block at least a portion of the opening of the glue overflow cavity 1104. Of course, since the glue has good adhesion, the end plates may not be necessary.

[0096] Please refer to this again. Figures 5-7 The number of overflow cavities 1104 is multiple, and the multiple overflow cavities 1104 are arranged in the second direction, which can increase the distribution range of the overflow cavities 1104. This can accommodate more excess glue, reduce the probability of glue blocking the vent hole 1102, and improve the safety and stability of the battery 100.

[0097] At least one overflow cavity 1104 is connected to an overflow hole 1105. Specifically, during the manufacturing of the support plate 111, multiple overflow cavities 1104 can be pre-set. After manufacturing, the number, arrangement, and location of the overflow holes 1105 can be selected as needed.

[0098] For example, in the plurality of glue overflow cavities 1104 of each support plate 111, a portion of the glue overflow cavities 1104 are connected to one or more glue overflow holes 1105, so that excess glue between the base plate 11 and the battery cell 40 can flow into this portion of the glue overflow cavities 1104 through the glue overflow holes 1105, while the other portion of the glue overflow cavities 1104 are not connected to the glue overflow holes 1105; or, in the plurality of glue overflow cavities 1104 of each support plate 111, each glue overflow cavity 1104 is connected to at least one glue overflow hole 1105, so that excess glue between the base plate 11 and the battery cell 40 can flow into the corresponding glue overflow cavity 1104 through the glue overflow hole 1105.

[0099] In the above technical solution, by setting multiple overflow cavities 1104, overflow holes 1105 can be formed on the support plate 111 as needed, and at least one overflow cavity 1104 can be connected to the overflow hole 1105. The design is more flexible and can meet different needs. Since the overflow hole 1105 can guide the flow of glue in a direction, the glue coating area of ​​the base plate 11 is increased. Excess glue flows into the overflow cavity 1104, reducing the probability of glue blocking the vent hole 1102, reducing the risk of combustion and explosion of the battery cell 40, and improving the safety and stability of the battery 100.

[0100] Optionally, multiple overflow cavities 1104 and multiple venting cavities 1101 are arranged alternately in the second direction. With this arrangement, since the overflow cavities 1104 can hold excess glue, the glue in the overflow cavities 1104, after curing, can also increase the structural strength of the support plate 111 and improve the deformation resistance of the support plate 111, thereby improving the reliability of the base plate 11.

[0101] Please refer to this again. Figure 7 The cross-sectional shape of the glue overflow cavity 1104 can be the same as or different from the cross-sectional shape of the venting cavity 1101. The cross-sectional area of ​​the glue overflow cavity 1104 can be smaller than that of the venting cavity 1101. This arrangement allows the support plate 111 to both store excess glue and improve venting performance. Furthermore, the cured glue still enhances the structural strength of the support plate 111, thereby improving the reliability of the base plate 11.

[0102] Please refer to this again. Figure 5 In some embodiments, the upper surface of the support plate 111 is provided with a plurality of blocking portions 112, and the plurality of blocking portions 112 correspond one-to-one with a plurality of vent hole groups 1103. Each blocking portion 112 includes two protrusions 1121 arranged opposite to each other in a first direction. Each protrusion 1121 extends along a second direction. The plurality of vent holes 1102 in each vent hole group 1103 are located between the two protrusions 1121 in the corresponding blocking portion 112.

[0103] The protrusion 1121 and the support plate 111 can be integrally formed, meaning the protrusion 1121 is integrally formed during the forming of the support plate 111. Alternatively, the protrusion 1121 and the support plate 111 can be separate structures, meaning the protrusion 1121 is placed on the support plate 111 after it has been formed. For example, the support plate 111 and the protrusion 1121 can be connected together using methods such as bonding, snap-fitting, or fasteners. The cross-sectional shape of the protrusion 1121 can be triangular, rectangular, or similar.

[0104] In the above technical solution, by setting the blocking part 112, on the one hand, the structural strength of the support plate 111 can be increased and the deformation resistance of the support plate 111 can be improved, thereby improving the reliability of the base plate 11. On the other hand, the vent hole 1102 and the overflow hole 1105 can be separated, so that the venting space and the overflow space do not interfere with each other. The blocking part 112 can prevent the glue between the battery cell 40 and the base plate 11 from entering the vent hole 1102, and instead allow the excess glue between two adjacent blocking parts 112 to flow into the overflow cavity 1104 from the overflow hole 1105, reducing the probability of glue blocking the vent hole 1102. Even if the battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the venting cavity 1101 through the vent hole 1102 for depressurization, reducing the risk of the battery cell 40 burning and exploding, and improving the safety and stability of the battery 100.

[0105] The number of support plates 111 is one, or the number of support plates 111 is multiple. Multiple support plates 111 are arranged side by side in the second direction. Multiple support plates 111 can be directly fixed to the bottom wall of the box 101, or they can be connected together and then fixed to the bottom wall of the box 101. The number of support plates 111 can be selected according to the number and arrangement of the battery cells 40, making the design more flexible.

[0106] Please refer to this again. Figure 6 and Figure 7 The support plate 111 includes a first plate portion 1111, a second plate portion 1112, and a plurality of partition portions 1113. The first plate portion 1111 is located above the second plate portion 1112, and the plurality of partition portions 1113 are located between the first plate portion 1111 and the second plate portion 1112. The plurality of partition portions 1113 can divide the space between the first plate portion 1111 and the second plate portion 1112 into a plurality of exhaust chambers 1101 and overflow chambers 1104. The exhaust holes 1102 and overflow holes 1105 penetrate the first plate portion 1111.

[0107] In the above technical solution, the partition 1113 can not only separate the exhaust chamber 1101 from the overflow chamber 1104 so that the exhaust chamber 1101 and the overflow chamber 1104 do not interfere with each other, but also support the first plate 1111, which is beneficial to improve the structural strength of the support plate 111, thereby improving the structural strength of the base plate 11.

[0108] The support plate 111 is a one-piece molded part. For example, the support plate 111 can be integrally injection molded or thermoformed. Integrating the support plate 111 into one piece can eliminate unnecessary connecting structures, simplify the manufacturing process of the support plate 111, thereby improving the production efficiency of the base plate 11. On the other hand, it can improve the overall performance of the support plate 111, increase its structural strength, and enhance its resistance to deformation, thereby improving the reliability of the base plate 11.

[0109] Please refer to 8 and Figure 9 , Figure 8 This is a schematic diagram of the structure of a battery 100 according to some embodiments of this application. Figure 9 for Figure 8 A partial enlarged view of the battery 100 shown.

[0110] According to some embodiments of this application, this application also provides a housing 101 for a battery 100, the housing 101 of the battery 100 including the base plate 11 of the above embodiments.

[0111] In the technical solution of this application embodiment, by using the above-mentioned base plate 11, excess glue between the base plate 11 and the battery cell 40 can flow into the glue overflow cavity 1104 through the glue overflow hole 1105, reducing the probability of glue blocking the vent hole 1102. When the battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity 1101 through the vent hole 1102 for pressure relief, reducing the risk of the battery cell 40 burning and exploding, and improving the safety and stability of the battery 100.

[0112] Please refer to this again. Figure 8 and Figure 9 According to some embodiments of this application, this application also provides a battery 100, which includes a housing 101 and a plurality of battery cells 40. The housing 101 is the housing 101 of the battery 100 described above. The plurality of battery cells 40 are disposed inside the housing 101. The bottom of each battery cell 40 is bonded to the upper surface of the base plate 11 by adhesive. A plurality of vent holes 1102 are respectively located directly below the plurality of battery cells 40, and the plurality of vent holes 1102 are disposed opposite to the explosion-proof valve on the corresponding battery cell 40.

[0113] During battery assembly 100, the overflow hole 1105 guides excess adhesive between the base plate 11 and the battery cell 40 into the overflow cavity 1104, increasing the adhesive application area on the base plate 11 and reducing the probability of adhesive entering the vent hole 1102 and blocking it after curing. This allows the vent hole 1102 and the vent cavity 1101 to release pressure normally. When the battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve of the battery cell 40 can enter the vent cavity 1101 through the vent hole 1102 for pressure relief, reducing the risk of combustion and explosion of the battery cell 40 and improving the safety and stability of the battery 100.

[0114] In the technical solution of this application embodiment, by adopting the casing 101 of the battery 100, excess glue between the bottom plate 11 and the battery cell 40 can flow into the overflow cavity 1104 through the overflow hole 1105, reducing the probability of glue blocking the vent hole 1102. When the battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent cavity 1101 through the vent hole 1102 for depressurization, reducing the risk of the battery cell 40 burning and exploding, and improving the safety and stability of the battery 100.

[0115] At least a portion of the glue overflow hole 1105 is located directly below the space between two adjacent battery cells 40. In other words, the glue overflow hole 1105 is offset from the battery cell 40, so that excess glue between the battery cell 40 and the base plate 11 can avoid the vent hole 1102 and enter the glue overflow cavity 1104 under the guidance of the glue overflow hole 1105. This reduces the probability of glue blocking the vent hole 1102, lowers the risk of the battery cell 40 burning or exploding, and improves the safety and stability of the battery 100.

[0116] Please refer to this again. Figure 8 and further refer to Figure 10 , Figure 10 for Figure 8 The image shows a partial enlarged view of the battery 100. Multiple battery cells 40 form multiple battery packs 60, which are arranged in a first direction. Each battery pack 60 includes multiple battery cells 40, and the multiple battery cells 40 in each battery pack 60 are arranged in a second direction. At least one overflow hole 1105 is located between two adjacent battery cells 40 in the battery pack 60.

[0117] Specifically, an overflow hole 1105 may be provided directly below the space between any two adjacent battery cells 40 in each battery pack 60; or an overflow hole 1105 may be provided directly below the space between two battery cells 40 in one battery pack 60; or an overflow hole 1105 may be provided directly below the space between two battery cells 40 in one part of the battery pack 60, and an overflow hole 1105 may be provided directly below the space between any two adjacent battery cells 40 in another part of the battery pack 60.

[0118] In the above technical solution, multiple batteries 100 are arranged in an orderly manner on the base plate 11. Depending on the situation, an overflow hole 1105 is provided directly below the space between two adjacent battery cells 40 in the battery pack 60. This can guide the excess glue between the base plate 11 and the battery cells 40 to flow in a directional manner, increase the glue application area of ​​the base plate 11, and make the glue diffuse away from the vent hole 1102, thereby reducing the probability of glue blocking the vent hole 1102 and improving the safety and stability of the battery 100.

[0119] The first direction and the second direction are perpendicular to each other, and both the first direction and the second direction are perpendicular to the thickness direction of the base plate 11. The second direction is the thickness direction of the battery cell 40. That is to say, multiple battery cells 40 in each battery pack 60 are stacked in their thickness direction, and each battery cell 40 stands upright on the base plate 11.

[0120] In the above technical solution, the multiple battery cells 40 are arranged more compactly, and each battery cell 40 can be bonded to the base plate 11, improving the installation reliability of each battery cell 40, thereby improving the reliability of the battery 100 in use.

[0121] Please refer to Figure 8 and Figure 10 A liquid cooling plate 50 is provided between any two adjacent battery cells 40 in the battery pack 60, and at least one overflow hole 1105 is located directly below the liquid cooling plate 50. By providing the liquid cooling plate 50 between two adjacent battery cells 40, heat exchange can be carried away between the liquid cooling plate 50 and the battery cells 40 during operation, thereby cooling down the battery cells 40 and reducing damage caused by excessive temperature.

[0122] In this configuration, multiple battery cells 40 within multiple battery packs 60 are arranged facing each other in a first direction, and multiple liquid cooling plates 50 within the multiple battery packs 60 are arranged facing each other one-to-one in the first direction. The multiple liquid cooling plates 50 arranged facing each other in the multiple battery packs 60 are an integral structure. The multiple liquid cooling plates 50 arranged facing each other can be integrally formed, or they can be connected together by welding, fasteners, or other connection methods.

[0123] In the above technical solution, by setting the multiple liquid cooling plates 50 facing each other in the multiple battery packs 60 into an integrated structure, on the one hand, the connection structure of the multiple liquid cooling plates 50 facing each other can be eliminated, simplifying the connection steps between the liquid cooling plates 50 and the multiple battery cells 40, which is conducive to improving the connection efficiency between the liquid cooling plates 50 and the multiple battery cells 40. On the other hand, the same liquid cooling plate 50 is connected to multiple battery cells 40, which is equivalent to connecting multiple battery cells 40 together, which can further improve the installation reliability of multiple battery cells 40 and make the overall performance of the battery 100 better.

[0124] According to some embodiments of this application, this application also provides an electrical device 1000, including a battery cell 40 as described in any of the above embodiments, or including a battery 100 as described in the above embodiments, wherein the battery 100 is used to provide electrical energy to the electrical device 1000.

[0125] The electrical device 1000 can be any of the aforementioned devices or systems that use the battery 100.

[0126] In the technical solution of this application embodiment, by using the above-mentioned battery 100, the safety and stability of the electrical device 1000 can be improved.

[0127] Please refer to this again. Figures 4-10 According to some embodiments of this application, a battery 100 is provided. The battery 100 includes a housing 101, a plurality of battery cells 40, and a plurality of liquid cooling plates 50.

[0128] The width direction of the housing 101 is a first direction (the first direction is the X direction shown in the figure), the length direction of the housing 101 is a second direction (the second direction is the Y direction shown in the figure), and the height direction of the housing 101 is a third direction (the third direction is the Z direction shown in the figure). The housing 101 includes a base plate 11, and the base plate 11 includes a plurality of support plates 111, which are arranged in the second direction. The length direction of each support plate 111 extends along the first direction, and the width direction of each support plate 111 extends along the second direction.

[0129] The support plate 111 internally defines a plurality of venting chambers 1101 and a plurality of overflow chambers 1104. Each venting chamber 1101 and each overflow chamber 1104 extends along a first direction. The plurality of venting chambers 1101 and the plurality of overflow chambers 1104 are alternately arranged in a second direction. Each support plate 111 is provided with a plurality of venting hole groups 1103 and a plurality of overflow hole groups 1106. The plurality of venting hole groups 1103 are spaced apart in the first direction, and the plurality of overflow hole groups 1106 are spaced apart in the first direction. The plurality of venting hole groups 1103 and the plurality of overflow hole groups 1106 are alternately arranged in the first direction. Each venting hole group 1103 includes a plurality of venting holes 1102, and the plurality of venting holes 1102 are spaced apart in the second direction. Each overflow hole group 1106 includes a single overflow hole 1105, which is spaced apart from the venting holes 1102 in the second direction. Each vent hole group 1103 has a protrusion 1121 on both sides in the second direction. The protrusion 1121 can be used to separate the adjacent vent hole group 1103 from the overflow hole group 1106.

[0130] Multiple battery cells 40 form multiple battery packs 60, which are arranged in a first direction. Each battery pack 60 is connected to the base plate 11 with adhesive, which cures to form an adhesive layer 12. Each battery pack 60 includes multiple battery cells 40, which are arranged in a second direction. The multiple battery cells 40 are positioned directly above multiple vent holes 1102, so that the explosion-proof valve on each battery cell 40 is directly opposite the corresponding vent hole 1102. In each battery pack 60, an overflow hole 1105 is provided between two adjacent battery cells 40.

[0131] The two protrusions 1121 located on both sides of the vent hole group 1103 can prevent excess glue between the battery cell 40 and the base plate 11 from entering the vent chamber 1101 through the vent hole 1102. Instead, excess glue enters the overflow chamber 1104 through the overflow hole 1105, reducing the probability of glue blocking the vent hole 1102. When the battery cell 40 experiences thermal runaway, the gas discharged from the explosion-proof valve can enter the vent chamber 1101 through the vent hole 1102 for pressure relief, reducing the risk of the battery cell 40 burning and exploding, and improving the safety and stability of the battery 100.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, include: The housing includes a bottom plate, the bottom plate includes a support plate, the support plate has multiple vent chambers and multiple vent holes, the multiple vent holes are arranged opposite to multiple battery cells of the battery and each vent hole communicates with at least one vent chamber; The support plate also has an overflow cavity and an overflow hole. The overflow cavity is arranged separately from the exhaust cavity, and the overflow hole is arranged at an interval from the exhaust hole and communicates with the overflow cavity. Multiple battery cells are disposed inside the housing, and the bottom of each battery cell is bonded to the upper surface of the base plate with adhesive. Multiple vent holes are located directly below the multiple battery cells and are positioned opposite to the explosion-proof valve on the corresponding battery cell.

2. The battery according to claim 1, characterized in that, The plurality of exhaust holes are divided into a plurality of exhaust hole groups, the plurality of exhaust hole groups are arranged in a first direction, each exhaust hole group includes a plurality of exhaust holes, and the plurality of exhaust holes in each exhaust hole group are arranged in a second direction; The projection of at least one of the overflow holes onto a plane perpendicular to the first direction lies between the projections of two adjacent vent holes in the vent hole group onto that plane.

3. The battery according to claim 2, characterized in that, At least one of the overflow holes is located between two adjacent sets of vent holes.

4. The battery according to claim 2, characterized in that, The number of overflow holes is multiple and they are divided into multiple overflow hole groups. The multiple overflow hole groups and the multiple vent hole groups are arranged alternately in the first direction, and each overflow hole group includes at least one overflow hole.

5. The battery according to any one of claims 2-4, characterized in that, The plurality of exhaust chambers are arranged in the second direction and each exhaust chamber extends along the first direction, and the plurality of exhaust holes in each exhaust hole group are connected to the plurality of exhaust chambers in a one-to-one correspondence; The overflow cavity extends along the first direction and is located between two adjacent exhaust cavities.

6. The battery according to claim 5, characterized in that, The number of overflow chambers is multiple, and the multiple overflow chambers are arranged in the second direction. At least one of the overflow chambers is connected to the overflow hole, and the multiple overflow chambers and the multiple venting chambers are arranged alternately in the second direction.

7. The battery according to any one of claims 2-4, characterized in that, The upper surface of the support plate is provided with multiple blocking parts, and each of the multiple blocking parts corresponds to one of the multiple exhaust hole groups; Each of the blocking portions includes two protrusions disposed opposite each other in the first direction, each of the protrusions extends along the second direction, and a plurality of the exhaust holes in each exhaust hole group are located between the two protrusions in the corresponding blocking portion.

8. The battery according to any one of claims 2-4, characterized in that, The number of support plates is one, or the number of support plates is multiple and the multiple support plates are arranged side by side in the second direction.

9. The battery according to any one of claims 1-4, characterized in that, The support plate includes: A first plate portion and a second plate portion, wherein the first plate portion is disposed above the second plate portion; Multiple partitions are provided between the first plate portion and the second plate portion to divide the space between the first plate portion and the second plate portion into multiple exhaust chambers and glue overflow chambers, wherein the exhaust holes and glue overflow holes pass through the first plate portion.

10. The battery according to claim 9, characterized in that, The support plate is a one-piece molded part.

11. The battery according to any one of claims 1-4, characterized in that, The cross-sectional area of ​​the overflow cavity is smaller than the cross-sectional area of ​​the exhaust cavity.

12. The battery according to claim 1, characterized in that, At least a portion of the overflow hole is located directly below the space between two adjacent battery cells.

13. The battery according to claim 1, characterized in that, Multiple battery cells form multiple battery packs, the multiple battery packs are arranged in a first direction, each battery pack includes multiple battery cells, and the multiple battery cells in each battery pack are arranged in a second direction; At least one of the overflow holes is located between two adjacent battery cells in the battery pack.

14. The battery according to claim 13, characterized in that, The first direction and the second direction are perpendicular to each other and both are perpendicular to the thickness direction of the base plate, and the second direction is the thickness direction of the battery cell.

15. The battery according to claim 13 or 14, characterized in that, A liquid cooling plate is provided between any two adjacent battery cells in the battery pack, and at least one of the overflow holes is located directly below the liquid cooling plate.

16. The battery according to claim 15, characterized in that, Multiple battery cells in the multiple battery packs are arranged facing each other in the first direction, and multiple liquid cooling plates in the multiple battery packs are arranged facing each other in the first direction in a one-to-one correspondence, and the multiple liquid cooling plates arranged facing each other in the multiple battery packs are an integral structure.

17. An electrical appliance, characterized in that, Includes the battery according to any one of claims 1-16.

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