Bottom plate, box body of battery, battery and electric device

Abstract

The invention discloses a bottom plate, a box body of a battery, the battery and an electric device. The bottom plate comprises a supporting plate, the supporting plate is provided with a plurality of exhaust cavities and a plurality of exhaust holes, the exhaust holes are used for being arranged opposite to a plurality of single batteries of the battery, and each exhaust hole is communicated with at least one exhaust cavity; the supporting plate is further provided with a glue overflowing cavity and a glue overflowing hole, the glue overflowing cavity and the exhaust cavity are arranged in a spaced mode, and the glue overflowing hole and the exhaust hole are arranged in a spaced mode and communicated with the glue overflowing cavity. According to the technical scheme, redundant glue between the bottom plate and the single battery can flow into the glue overflowing cavity from the glue overflowing hole, the probability that the glue blocks the exhaust hole is reduced, when the single battery is subjected to thermal runaway, gas exhausted from the anti-explosion valve can enter the exhaust cavity through the exhaust hole for pressure relief, and the safety of the battery is improved. The risk of combustion explosion of the battery monomers is reduced, and the use safety and stability of the battery are improved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a base plate, a battery box, a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] The bottom of the battery cell in the related art cannot vent air well, and when thermal runaway occurs, it is easy to burn or explode, seriously affecting the safety and stability of the battery. Summary of the invention

[0004] In view of the above problems, the present application provides a base plate, a battery box, a battery and an electrical device. The base plate can be well ventilated to improve the safety and stability of the battery.

[0005] In a first aspect, the present application provides a base plate, comprising a support plate, wherein the support plate has a plurality of exhaust cavities and a plurality of exhaust holes, wherein the plurality of exhaust holes are used to be arranged opposite to a plurality of battery cells of a battery and each of the exhaust holes is connected to at least one of the exhaust cavities; wherein the support plate further has a glue overflow cavity and a glue overflow hole, wherein the glue overflow cavity is separated from the exhaust cavity, and the glue overflow hole is spaced apart from the exhaust holes and is connected to the glue overflow cavity.

[0006] In the technical solution of the embodiment of the present application, by arranging glue overflow holes and glue overflow cavity on the bottom plate, excess glue between the bottom plate and the battery cell can flow from the glue overflow holes into the glue overflow cavity, thereby reducing the probability of glue blocking the exhaust holes; when thermal runaway occurs in the battery cell, the gas discharged from the explosion-proof valve can enter the exhaust cavity through the exhaust hole for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell and improving the safety and stability of battery use.

[0007] In some embodiments, the plurality of exhaust holes are divided into a plurality of exhaust hole groups, the plurality of exhaust hole groups are arranged in the 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 the second direction; the projection of at least one of the overflow holes on a plane perpendicular to the first direction is located between the projections of two adjacent exhaust holes in the exhaust hole group on the plane. Since the exhaust holes are arranged relative to the battery cells, the overflow holes and the exhaust holes are arranged at intervals in the second direction, so that the overflow holes and the battery cells are staggered, so that the overflow holes and the space between the two adjacent battery cells are arranged relative to each other, so that the excess glue between the battery cells and the bottom plate can enter the overflow cavity under the guidance of the overflow holes, thereby reducing the probability of glue blocking the exhaust holes, reducing the risk of combustion and explosion of the battery cells, 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 exhaust hole groups. In the above technical solution, on the one hand, the distance between the overflow hole and the exhaust hole in the first direction can be increased to improve the structural strength of the bottom plate, and on the other hand, the glue flow can be directed to increase the glue coating area of ​​the bottom plate and diffuse the glue away from the exhaust hole, thereby reducing the probability of glue blocking the exhaust hole and improving the safety and stability of the battery.

[0009] In some embodiments, the number of the overflow holes is multiple and they are divided into multiple overflow hole groups, the multiple overflow hole groups and the multiple exhaust hole groups are alternately arranged in the first direction, and each overflow hole group includes at least one overflow hole. With such an arrangement, the multiple overflow holes can be dispersedly arranged on the support plate, so that the glue can be applied more evenly to the bonding area of ​​the support plate, which can not only increase the glue coating area of ​​the support plate and improve the connection reliability between the support plate and multiple battery cells, but also reduce the probability of glue blocking the exhaust holes, reduce the risk of combustion and explosion of battery cells, and improve the safety and stability of the battery.

[0010] In some embodiments, the plurality of exhaust cavities are arranged in the second direction and each of the exhaust cavities extends along the first direction, and the plurality of exhaust holes in each exhaust hole group are connected to the plurality of exhaust cavities in a one-to-one correspondence; the overflow glue cavity extends along the first direction and is located between two adjacent exhaust cavities. Since the plurality of exhaust holes in each exhaust hole group are arranged in the second direction and each exhaust cavity extends along the first direction, the arrangement direction of the plurality of exhaust holes in each exhaust hole group is arranged crosswise with the extension direction of the exhaust cavity. Compared with the technical solution in which the arrangement direction of the plurality of exhaust holes in each exhaust hole group is consistent with the extension direction of the exhaust cavity, the following beneficial technical effects are achieved. With respect to the exhaust holes, in the second direction, there is a partition between any two adjacent exhaust holes, and the partition is a partition between two adjacent exhaust cavities in the second direction. The partition can support the planar layer structure where the exhaust holes are located, thereby improving the structural strength of the planar layer structure, thereby improving the overall structural strength of the support plate. With respect to the exhaust cavity, in the first direction, the planar layer structure located above the exhaust cavity is divided into a plurality of first-stage layer structures and second-stage layer structures that are alternately arranged. Exhaust holes can be set on the first-stage layer structure, and the second-stage layer structure can be provided with overflow holes or a complete non-porous structure as required. In this way, the planar layer structure above the exhaust cavity is used to reinforce the structural strength of the planar layer where the exhaust cavity is located, thereby improving the overall structural strength of the support plate. Therefore, in the above technical solution, the problem of weak local structural strength of the support plate can be reduced, the overall structural strength of the support plate can be improved, and the anti-deformation ability of the support plate can be improved, thereby improving the reliability of the bottom plate.

[0011] In some embodiments, there are multiple overflow glue cavities, multiple overflow glue cavities are arranged in the second direction, at least one overflow glue cavity is connected to the overflow glue hole, and multiple overflow glue cavities and multiple exhaust cavities are alternately arranged in the second direction. In the above technical solution, by setting multiple overflow glue cavities, holes can be opened on the support plate to form overflow glue holes as needed, and at least one overflow glue cavity is connected to the overflow glue hole. The design is more flexible and can meet different needs. Since the overflow glue hole can guide the flow of glue in a directional manner and increase the glue coating area of ​​the bottom plate, excess glue flows into the overflow glue cavity, reducing the probability of glue blocking the exhaust hole, reducing the risk of combustion and explosion of the battery cell, and improving the safety and stability of the battery. Since the overflow glue cavity can accommodate excess glue, the glue in the overflow glue cavity can also increase the structural strength of the support plate after solidification, and improve the anti-deformation ability of the support plate, thereby improving the reliability of the bottom plate.

[0012] In some embodiments, the upper surface of the support plate is provided with a plurality of blocking parts, and the plurality of blocking parts correspond to the plurality of exhaust hole groups one by one; wherein each blocking part comprises two convex parts arranged opposite to each other in the first direction, each convex part extends along the second direction, and the plurality of exhaust holes in each exhaust hole group are located between the two convex parts in the corresponding blocking part. In the above technical scheme, by setting the blocking part, on the one hand, the structural strength of the support plate can be increased, the anti-deformation ability of the support plate can be improved, thereby improving the reliability of the bottom plate; on the other hand, the exhaust hole and the overflow hole can be separated, so that the exhaust space and the overflow space do not interfere with each other; the blocking part can block the glue between the battery cell and the bottom plate from entering the exhaust hole, but makes the excess glue between the two adjacent blocking parts flow from the overflow hole into the overflow cavity, reducing the probability of glue blocking the exhaust hole; even if the battery cell has thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity through the exhaust hole for pressure relief, reducing the risk of combustion and explosion of the battery cell, and improving the safety and stability of the battery.

[0013] In some embodiments, the number of the support plate is one, or the number of the 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, which makes 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 is arranged above the second plate portion; a plurality of partitions, the plurality of partitions are arranged between the first plate portion and the second plate portion, so as to divide the space between the first plate portion and the second plate portion into a plurality of exhaust cavities and overflow glue cavities, and the exhaust holes and the overflow glue holes pass through the first plate portion. In the above technical solution, the partitions can not only separate the exhaust cavities from the overflow glue cavities so that the exhaust cavities and the overflow glue cavities do not interfere with each other, but also play a supporting role for the first plate portion, which is beneficial to improving the structural strength of the support plate, thereby improving the structural strength of the bottom plate.

[0015] In some embodiments, the support plate is an integrally formed part. Integrally forming the support plate can, on the one hand, eliminate redundant connection structures and simplify the manufacturing process of the support plate, thereby improving the production efficiency of the base plate; on the other hand, it can improve the overall performance of the support plate, increase the structural strength of the support plate, and improve the anti-deformation ability of the support plate, thereby improving the reliability of the base plate.

[0016] In some embodiments, the cross-sectional area of ​​the overflow glue cavity is smaller than the cross-sectional area of ​​the exhaust cavity. This arrangement allows the support plate to store excess glue and improve exhaust performance, and the structural strength of the support plate can still be improved after the glue is cured, thereby improving the reliability of the bottom plate.

[0017] In a second aspect, the present application provides a battery box, which includes the bottom plate described in the above embodiment.

[0018] In the technical solution of the embodiment of the present application, by adopting the above-mentioned bottom plate, excess glue between the bottom plate and the battery cell can flow into the glue overflow cavity from the glue overflow hole, reducing the probability of glue blocking the exhaust hole; when thermal runaway occurs in the battery cell, the gas discharged from the explosion-proof valve can enter the exhaust cavity through the exhaust hole for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell and improving the safety and stability of battery use.

[0019] In the third aspect, the present application provides a battery, which includes: a box body, which is the box body of the battery described in the above embodiment; a plurality of battery cells, which are arranged in the box body and the bottom of each of the battery cells is connected to the upper surface of the bottom plate by glue, and the plurality of exhaust holes are respectively located directly below the plurality of battery cells and are arranged opposite to the explosion-proof valves on the corresponding battery cells.

[0020] In the technical solution of the embodiment of the present application, by adopting the above-mentioned battery box, excess glue between the bottom plate and the battery cell can flow into the glue overflow cavity from the glue overflow hole, reducing the probability of glue blocking the exhaust hole; when the battery cell suffers thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity through the exhaust hole for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell and improving the safety and stability of battery use.

[0021] In some embodiments, at least a portion of the glue overflow hole is located directly below the space between two adjacent battery cells, so that excess glue between the battery cell and the bottom plate can avoid the vent hole and enter the glue overflow cavity under the guidance of the glue overflow hole, thereby reducing the probability of glue blocking the vent hole, reducing the risk of combustion and explosion of the battery cell, and improving the safety and stability of the battery.

[0022] In some embodiments, a plurality of the battery cells form a plurality of battery groups, the plurality of the battery groups are arranged in a first direction, each of the battery groups includes a plurality of the battery cells, and the plurality of the battery cells in each of the battery groups are arranged in a second direction; at least one of the glue overflow holes is located between two adjacent battery cells in the battery group. In the above technical solution, a plurality of batteries are arranged in an orderly manner on the bottom plate, and a glue overflow hole is set directly below the space between two adjacent battery cells in the battery group according to the situation, which can guide the directional flow of excess glue between the bottom plate and the battery cells, increase the glue coating area of ​​the bottom plate, and diffuse the glue in a direction away from the exhaust hole, reduce the probability of glue blocking the exhaust hole, and improve the safety and stability of the battery.

[0023] In some embodiments, the first direction and the second direction are perpendicular to each other and are perpendicular to the thickness direction of the bottom plate, and 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 bottom plate, thereby improving the installation reliability of each battery cell, thereby improving the reliability of battery 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, the liquid cooling plate can exchange heat with the battery cells, take away the heat generated by the battery cells during operation, achieve cooling of the battery cells, and reduce damage caused by excessive temperature.

[0025] In some embodiments, the battery cells in the battery packs are arranged opposite to each other in the first direction, the liquid cooling plates in the battery packs are arranged opposite to each other in a one-to-one correspondence in the first direction, and the liquid cooling plates in the battery packs are an integrated structure. In the above technical solution, by arranging the liquid cooling plates in the battery packs to be arranged opposite to each other as an integrated structure, on the one hand, the connection structure of the liquid cooling plates arranged opposite to each other can be omitted, and the connection steps between the liquid cooling plates and the battery cells can be simplified, which is conducive to improving the connection efficiency between the liquid cooling plates and the battery cells. On the other hand, the same liquid cooling plate is connected to the battery cells, which is equivalent to connecting the battery cells together, which can further improve the installation reliability of the battery cells and improve the overall performance of the battery.

[0026] In a fourth aspect, the present application provides an electrical device, which includes the battery in the above embodiment.

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

[0028] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0030] Figure 1 A schematic diagram of the structure of an electric device in some embodiments of the present application;

[0031] Figure 2 A schematic diagram of the structure of a battery in some embodiments of the present application;

[0032] Figure 3 A schematic diagram of the structure of a battery cell in some embodiments of the present application;

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

[0034] Figure 5 A schematic diagram of the structure of a support plate of a base plate of some embodiments of the present application;

[0035] Figure 6 for Figure 5 A side view of the support plate shown in ;

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

[0037] Figure 8 A schematic diagram of the structure of batteries in some other embodiments of the present application;

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

[0039] Fig.10 for Figure 8 A partial enlarged view of the battery shown in .

[0040] The reference numerals in the specific implementation manner are as follows:

[0041] The electric device 1000,

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

[0043] Bottom plate 11,

[0044] Exhaust cavity 1101, exhaust hole 1102, exhaust hole group 1103,

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

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

[0047] Controller 200, motor 300,

[0048] The first direction is X, the second direction is Y, the third direction is Z,

[0049] Battery cell 40, shell 41, shell cover 411, shell body 412, battery cell assembly 42, pole ear 421, electrode terminal 43,

[0050] Liquid cooling plate 50 , battery pack 60 . DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0056] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0057] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", and "circumferential" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0058] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0059] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0060] For general batteries, during the use or energy storage of the battery, abnormal reasons such as weather, aging, overcharging, etc. often cause thermal runaway of the battery cells inside the battery, thereby generating a large amount of thermal runaway smoke. The thermal runaway smoke contains a large amount of flammable gases and substances. Therefore, in order to reduce the risk of battery use, an exhaust structure is set on the bottom plate at the bottom of the battery cell for exhaust.

[0061] The exhaust structure on the bottom plate of the battery in the related art is prone to blockage, resulting in poor exhaust. When the battery cell has thermal runaway problems, it is easy to burn and even cause the battery cell to explode, affecting the safety and stability of the battery cell during use.

[0062] In order to improve the safety and stability of battery use, the present application provides a glue overflow cavity and a glue overflow hole on the bottom plate at the bottom of the battery cell. When assembling the battery, excess glue between the bottom plate and the battery cell will enter the glue overflow cavity from the glue overflow hole, reducing the probability of glue entering the exhaust hole and blocking the exhaust hole after curing. Even when the battery cell has thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity through the exhaust hole for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell and improving the safety and stability of the battery.

[0063] The battery disclosed in the embodiments of the present application can be used in an electrical device that uses the battery as a power source or in various energy storage systems that use the battery as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0064] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0065] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle, and the battery 100 may be provided at the bottom, head or tail of the vehicle. The battery 100 may be used to power the vehicle, for example, the battery 100 may be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle.

[0066] In some embodiments of the present application, the battery 100 can be used not only as an operating power source for the vehicle, but also as a 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 2An exploded view of a battery 100 provided in some embodiments of the present 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 box 101 and a plurality of battery cells 40, and the plurality of battery cells 40 are accommodated in the box 101. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the plurality of battery cells 40.

[0068] The multiple battery cells 40 can be connected in series, in parallel or in a mixed connection. The mixed connection means that the multiple battery cells 40 are both connected in series and in parallel. The multiple battery cells 40 can be directly connected in series, in parallel or in a mixed connection, and then the whole formed by the multiple battery cells 40 is accommodated in the box 101; of course, the battery 100 can also be a battery 100 module formed by connecting multiple battery cells 40 in series, in parallel or in a mixed connection, and then the multiple battery 100 modules are connected in series, in parallel or in a mixed connection to form a whole, and then accommodated in the box 101.

[0069] Each battery cell 40 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 40 may be cylindrical, flat, rectangular, or in other shapes.

[0070] Please refer again Figure 2 , and further refer to Figure 3 , Figure 3 The schematic diagram of the structure of the battery cell 40 provided in some embodiments of the present application. The battery cell 40 refers to the smallest unit constituting the battery 100. The battery cell 40 includes a housing 41, a battery cell assembly 42 and other functional components.

[0071] The shell 41 includes a shell cover 411 and a shell body 412. The shell cover 411 refers to a component that covers the opening of the shell body 412 to isolate the internal environment of the battery cell 40 from the external environment. Without limitation, the shape of the shell cover 411 can be adapted to the shape of the shell body 412 to match the shell body 412. Optionally, the shell cover 411 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the shell cover 411 is not easy to deform when it is squeezed and collided, so that the battery cell 40 can have a higher structural strength and reliability can also be improved. Functional components such as electrode terminals 43 can be provided on the shell cover 411. The electrode terminal 43 can be used to electrically connect to the battery cell assembly 42 for outputting or inputting electrical energy of the battery cell 40. In some embodiments, the shell cover 411 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 40 reaches a threshold. The shell cover 411 may also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating member (not shown in the figure) may also be provided on the inner side of the shell cover 411, and the insulating member may be used to isolate the electrical connection components in the shell body 412 from the shell cover 411 to reduce the risk of short circuit. Exemplarily, the insulating member may be plastic, rubber, etc. The shell body 412 is a component used to cooperate with the shell cover 411 to form the internal environment of the battery cell 40, wherein the formed internal environment can be used to accommodate the battery cell assembly 42, electrolyte and other components. The shell body 412 and the shell cover 411 may be independent components, and an opening may be provided on the shell body 412, and the internal environment of the battery cell 40 is formed by covering the opening with the shell cover 411 at the opening. Without limitation, the shell cover 411 and the shell body 412 can also be integrated. Specifically, the shell cover 411 and the shell body 412 can form a common connection surface before other components are put into the shell. When it is necessary to encapsulate the interior of the shell body 412, the shell cover 411 is then covered with the shell body 412. The shell body 412 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell body 412 can be determined according to the specific shape and size of the battery cell assembly 42. The shell body 412 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0072] The battery cell assembly 42 is a component in the battery cell 40 where electrochemical reactions occur. One or more battery cell assemblies 42 may be included in the shell 412. The battery cell assembly 42 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly 42, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 421. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the tab 421 connects the electrode terminal 43 to form a current loop.

[0073] Please refer again Figure 2 The box body 101 is used to provide a storage space for the battery cell 40, and the box body 101 can adopt a variety of structures.

[0074] In some embodiments, the box body 101 may include a first portion 1011 and a second portion 1012, the first portion 1011 and the second portion 1012 cover each other, and the first portion 1011 and the second portion 1012 jointly define a storage space for accommodating the battery cell 40. The second portion 1012 may be a hollow structure with one end open, and the first portion 1011 may be a plate-like structure, and the first portion 1011 covers the open side of the second portion 1012, so that the first portion 1011 and the second portion 1012 jointly define a storage space; the first portion 1011 and the second portion 1012 may also be hollow structures with one side open, and the open side of the first portion 1011 covers the open side of the second portion 1012. Of course, the box body 101 formed by the first portion 1011 and the second portion 1012 may be in various shapes, such as a cylinder, a cuboid, etc.

[0075] In some embodiments, the housing 101 of the battery 100 may include a bottom plate 11, and the bottom plate 11 may be used to support a plurality of battery cells 40. Figure 4 , Figure 4 The bottom plate 11 of some embodiments of the present application is a schematic diagram of the structure. The bottom plate 11 may include a support plate 111, the support plate 111 has a plurality of exhaust cavities 1101 and a plurality of exhaust holes 1102, the plurality of exhaust holes 1102 are used to be arranged opposite to the plurality of battery cells 40 of the battery 100, and each exhaust hole 1102 is connected to at least one exhaust cavity 1101.

[0076] When thermal runaway occurs in the battery cell 40, the gas discharged from the explosion-proof valve (not shown in the figure) of the battery cell 40 can enter the exhaust cavity 1101 through the exhaust hole 1102 to release pressure, thereby reducing the risk of combustion and explosion of the battery cell 40 and improving the safety and stability of the battery 100. Among them, the "explosion-proof valve" automatically opens when the battery cell 40 is over-pressurized or the temperature is too high, thereby achieving the purpose of explosion prevention.

[0077] The support plate 111 also has a glue overflow cavity 1104 and a glue overflow hole 1105. The glue overflow cavity 1104 and the glue overflow hole 1105 are connected. The glue overflow cavity 1104 is separated from the exhaust cavity 1101, and the glue overflow hole 1105 is spaced from the exhaust hole 1102, that is, the glue overflow space and the exhaust space do not interfere with each other. When assembling the battery 100, the glue overflow hole 1105 can guide the excess glue between the bottom plate 11 and the battery cell 40 to flow into the glue overflow cavity 1104, increase the glue coating area on the bottom plate 11, reduce the probability of glue entering the exhaust hole 1102 and blocking the exhaust hole 1102 after curing, so that the exhaust hole 1102 and the exhaust cavity 1101 can be depressurized normally.

[0078] In the technical solution of the embodiment of the present application, by setting the glue overflow hole 1105 and the glue overflow cavity 1104 on the bottom plate 11, the excess glue between the bottom plate 11 and the battery cell 40 can flow from the glue overflow hole 1105 into the glue overflow cavity 1104, thereby reducing the probability of glue blocking the exhaust hole 1102. When the battery cell 40 has thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity 1101 through the exhaust hole 1102 for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell 40 and improving the safety and stability of the battery 100.

[0079] Please refer again Figure 4 , and further refer to Figure 5 , Figure 5 Schematic diagram of the structure of the support plate 111 of the bottom plate 11 of some embodiments of the present application. The plurality of exhaust holes 1102 are divided into a plurality of exhaust hole groups 1103, and the plurality of exhaust hole groups 1103 are arranged in a first direction. Each exhaust hole group 1103 includes a plurality of exhaust holes 1102, and the plurality of exhaust holes 1102 in each exhaust hole group 1103 are arranged in a second direction, that is, the plurality of exhaust holes 1102 are arranged in the first direction and the second direction. The first direction is Figure 4 The X direction is shown in Figure 4 The Y direction is shown in FIG.

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

[0081] Since the exhaust hole 1102 is arranged opposite to the battery cell 40, the glue overflow hole 1105 and the exhaust hole 1102 are arranged in the second direction at intervals, so that the glue overflow hole 1105 and the battery cell 40 are staggered. In this way, the glue overflow hole 1105 and the space between two adjacent battery cells 40 are arranged opposite to each other, so that the excess glue between the battery cell 40 and the bottom plate 11 can enter the glue overflow cavity 1104 under the guidance of the glue overflow hole 1105, thereby reducing the probability of glue blocking the exhaust hole 1102, reducing the risk of combustion and explosion of the battery cell 40, and improving the safety and stability of the battery 100.

[0082] On the basis of arranging the glue overflow hole 1105 and the exhaust hole 1102 at intervals in the second direction, at least one glue overflow hole 1105 may be disposed between two adjacent exhaust hole groups 1103 , even if the glue overflow hole 1105 and the exhaust hole 1102 are arranged at intervals in the first direction.

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

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

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

[0086] With such a configuration, multiple glue overflow holes 1105 can be dispersedly arranged on the support plate 111, so that the glue can be more evenly coated on the bonding area of ​​the support plate 111. This can not only increase the glue coating area of ​​the support plate 111 and improve the connection reliability between the support plate 111 and multiple battery cells 40, but also reduce the probability of glue blocking the exhaust holes 1102, reduce the risk of combustion and explosion of the battery cells 40, and improve the safety and stability of the battery 100.

[0087] Each glue overflow hole group 1106 includes at least one glue overflow hole 1105. For example, each glue overflow hole group 1106 may include one glue overflow hole 1105; for another example, each glue overflow hole group 1106 may include multiple glue overflow holes 1105, and the multiple glue overflow holes 1105 may be arranged at intervals in the second direction, or the multiple glue overflow holes 1105 may be arranged in other discharge modes, which may be specifically set according to actual conditions.

[0088] Please refer again Figure 4 and Figure 5 , and further refer to Figure 6 and Figure 7 , Figure 6 for Figure 5 A side view of the support plate 111 is shown in FIG. Figure 7 for Figure 6 A partial enlarged view of the support plate 111 is shown in FIG. A plurality of exhaust cavities 1101 are arranged in the second direction, each exhaust cavity 1101 extends along the first direction, and a plurality of exhaust holes 1102 in each exhaust hole group 1103 are connected to the plurality of exhaust cavities 1101 in a one-to-one correspondence.

[0089] That is to say, the arrangement direction of the multiple exhaust holes 1102 in each exhaust hole group 1103 is cross-set with the extension direction of the exhaust cavity 1101, the number of exhaust cavities 1101 is equal to the number of exhaust holes 1102 in each exhaust hole group 1103, and the multiple exhaust holes 1102 in each exhaust hole group 1103 and the multiple exhaust cavities 1101 can be arranged one by one relative to each other and connected correspondingly, so that each exhaust cavity 1101 is finally connected with an exhaust hole 1102 corresponding to the position 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 cross-arranged with the extension direction of the exhaust cavity 1101. Compared with the technical solution in which 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] With respect to the exhaust holes 1102, in the second direction, there is a partition 1113 between any two adjacent exhaust holes 1102, and the partition 1113 is the partition 1113 between two adjacent exhaust cavities 1101 in the second direction. The partition 1113 can support the planar layer structure where the exhaust holes 1102 are located, thereby improving the structural strength of the planar layer structure, thereby improving the overall structural strength of the support plate 111.

[0092] With respect to the exhaust cavity 1101, in the first direction, the planar layer structure located above the exhaust cavity 1101 is divided into a plurality of first-section layer structures and second-section layer structures which are alternately arranged. The exhaust holes 1102 may be provided on the first-section layer structure, and the second-section layer structure may be provided with overflow holes 1105 or a complete hole-free structure as required. In this way, the planar layer structure above the exhaust cavity 1101 is utilized to reinforce the structural strength of the planar layer where the exhaust cavity 1101 is located, thereby improving the overall structural strength of the support plate 111.

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

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

[0095] In order to prevent the glue in the overflow glue cavity 1104 from flowing out, end plates can be provided at both ends of the support plate 111 in the first direction to cover at least a portion of the opening of the overflow glue cavity 1104. Of course, since the glue has good viscosity, no end plates may be provided.

[0096] Please refer again Figure 5-Figure 7 There are multiple overflow glue cavities 1104, and the multiple overflow glue cavities 1104 are arranged in the second direction, which can increase the distribution range of the overflow glue cavity 1104, so that more excess glue can be accommodated, reducing the probability of glue blocking the exhaust hole 1102, and improving the safety and stability of the battery 100.

[0097] At least one overflow cavity 1104 is connected to the overflow hole 1105. Specifically, when manufacturing the support plate 111, a plurality of overflow cavities 1104 can be preset, and after manufacturing, the number, arrangement, and location of the overflow holes 1105 can be selected as needed.

[0098] For example, among the multiple glue overflow cavities 1104 of each support plate 111, a part of the glue overflow cavities 1104 is connected to one or more glue overflow holes 1105, so that excess glue between the bottom plate 11 and the battery cell 40 can flow into this part of the glue overflow cavities 1104 through the glue overflow holes 1105, while another part of the glue overflow cavities 1104 is not connected to the glue overflow holes 1105; for another example, among the multiple 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 bottom plate 11 and the battery cell 40 can flow into the corresponding glue overflow cavity 1104 through the glue overflow holes 1105.

[0099] In the above technical solution, by setting a plurality of overflow glue cavities 1104, holes can be opened on the support plate 111 as needed to form overflow glue holes 1105, and at least one overflow glue cavity 1104 is connected to the overflow glue hole 1105. The design is more flexible and can meet different needs. Since the overflow glue hole 1105 can guide the flow of glue in a directional manner and increase the glue coating area of ​​the bottom plate 11, excess glue flows into the overflow glue cavity 1104, reducing the probability of glue blocking the exhaust 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, a plurality of overflow glue cavities 1104 and a plurality of exhaust cavities 1101 are alternately arranged in the second direction. In this arrangement, since the overflow glue cavities 1104 can accommodate excess glue, the glue in the overflow glue cavities 1104 can also increase the structural strength of the support plate 111 after solidification, and improve the anti-deformation ability of the support plate 111, thereby improving the reliability of the bottom plate 11.

[0101] Please refer again Figure 7 The cross-sectional shape of the overflow glue cavity 1104 may be the same as or different from the cross-sectional shape of the exhaust cavity 1101. The cross-sectional area of ​​the overflow glue cavity 1104 may be smaller than the cross-sectional area of ​​the exhaust cavity 1101. With such a configuration, the support plate 111 can store excess glue and improve the exhaust performance. Moreover, after the glue is cured, the structural strength of the support plate 111 can still be improved, thereby improving the reliability of the bottom plate 11.

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

[0103] The convex portion 1121 and the support plate 111 can be integrally formed, that is, the convex portion 1121 is integrally formed when the support plate 111 is formed. The convex portion 1121 and the support plate 111 can also be a separate structure, that is, after the support plate 111 is formed, the convex portion 1121 is set on the support plate 111. For example, the support plate 111 and the convex portion 1121 can be connected together by bonding, clamping, fasteners, etc. Among them, the cross-sectional shape of the convex portion 1121 can be a triangular, rectangular, or other structure.

[0104] In the above technical scheme, by setting the blocking portion 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 bottom plate 11; on the other hand, the exhaust hole 1102 and the glue overflow hole 1105 can be separated, so that the exhaust space and the glue overflow space do not interfere with each other. The blocking portion 112 can block the glue between the battery cell 40 and the bottom plate 11 from entering the exhaust hole 1102, and instead allows the excess glue between two adjacent blocking portions 112 to flow from the glue overflow hole 1105 into the glue overflow cavity 1104, thereby reducing the probability of glue blocking the exhaust hole 1102. Even if the battery cell 40 has thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity 1101 through the exhaust hole 1102 for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell 40 and improving the safety and stability of the battery 100.

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

[0106] Please refer 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 partitions 1113. The first plate portion 1111 is disposed above the second plate portion 1112. The plurality of partitions 1113 are disposed between the first plate portion 1111 and the second plate portion 1112. The plurality of partitions 1113 can divide the space between the first plate portion 1111 and the second plate portion 1112 into a plurality of exhaust cavities 1101 and overflow glue cavities 1104. The exhaust holes 1102 and the overflow glue holes 1105 pass through the first plate portion 1111.

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

[0108] The support plate 111 is an integrally formed part. For example, the support plate 111 can be integrally formed by injection molding or hot pressing. The integrally formed support plate 111 can, on the one hand, eliminate redundant connection structures and simplify the manufacturing process of the support plate 111, thereby improving the production efficiency of the bottom plate 11; on the other hand, it can improve the overall performance of the support plate 111, increase the structural strength of the support plate 111, and improve the anti-deformation ability of the support plate 111, thereby improving the reliability of the bottom plate 11.

[0109] Please refer to 8 and Fig. 9 , Figure 8 Schematic diagram of the structure of the battery 100 according to some other embodiments of the present application. Fig. 9 for Figure 8 FIG. 1 is a partial enlarged view of the battery 100 shown in FIG.

[0110] According to some embodiments of the present application, the present application further provides a case 101 of a battery 100 , and the case 101 of the battery 100 includes the bottom plate 11 of the above embodiment.

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

[0112] Please refer again Figure 8 and Fig. 9 According to some embodiments of the present application, the present application also provides a battery 100, which includes a box body 101 and a plurality of battery cells 40. The box body 101 is the box body 101 of the battery 100 of the above embodiment. The plurality of battery cells 40 are arranged in the box body 101. The bottom of each battery cell 40 is connected to the upper surface of the bottom plate 11 by glue. The plurality of exhaust holes 1102 are respectively located directly below the plurality of battery cells 40, and the plurality of exhaust holes 1102 are arranged opposite to the explosion-proof valves on the corresponding battery cells 40.

[0113] When assembling the battery 100, the glue overflow hole 1105 can guide the excess glue between the bottom plate 11 and the battery cell 40 to flow into the glue overflow cavity 1104, thereby increasing the glue coating area on the bottom plate 11 and reducing the probability of glue entering the vent hole 1102 and blocking the vent hole 1102 after curing, so that the vent hole 1102 and the vent cavity 1101 can be depressurized normally. When the battery cell 40 has 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 depressurization, thereby 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 the embodiment of the present application, by adopting the box body 101 of the above-mentioned battery 100, the excess glue between the bottom plate 11 and the battery cell 40 can flow into the glue overflow cavity 1104 from the glue overflow hole 1105, thereby reducing the probability of glue blocking the exhaust hole 1102. When the battery cell 40 has thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity 1101 through the exhaust hole 1102 for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell 40 and improving the safety and stability of the battery 100.

[0115] Among them, at least a part of the overflow hole 1105 is located directly below the space between two adjacent battery cells 40. In other words, the overflow hole 1105 and the battery cell 40 are staggered, so that the excess glue between the battery cell 40 and the bottom plate 11 can avoid the vent hole 1102 and enter the overflow cavity 1104 under the guidance of the overflow hole 1105, thereby 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.

[0116] Please refer again Figure 8 , and further refer to Fig.10 , Fig.10 for Figure 8 A partial enlarged view of the battery 100 shown in FIG. A plurality of battery cells 40 form a plurality of battery groups 60, the plurality of battery groups 60 are arranged in a first direction, each battery group 60 includes a plurality of battery cells 40, the plurality of battery cells 40 in each battery group 60 are arranged in a second direction, and at least one glue overflow hole 1105 is located between two adjacent battery cells 40 in the battery group 60.

[0117] Specifically, a glue overflow hole 1105 may be provided directly below the space between any two adjacent battery cells 40 in each battery group 60, or a glue overflow hole 1105 may be provided directly below the space between two battery cells 40 in each battery group 60, or a glue overflow hole 1105 may be provided directly below the space between two battery cells 40 in a part of the battery groups 60, and a glue overflow hole 1105 may be provided directly below the space between any two adjacent battery cells 40 in another part of the battery groups 60.

[0118] In the above technical solution, multiple batteries 100 are arranged in an orderly manner on the base plate 11, and a glue overflow hole 1105 is set directly below the space between two adjacent battery cells 40 in the battery pack 60 according to the situation. This can guide the directional flow of excess glue between the base plate 11 and the battery cells 40, increase the glue coating area of ​​the base plate 11, and make the glue diffuse in a direction away from the exhaust hole 1102, thereby reducing the probability of glue blocking the exhaust 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 are perpendicular to the thickness direction of the bottom plate 11, and the second direction is the thickness direction of the battery cell 40. That is, the multiple battery cells 40 in each battery pack 60 are stacked in the thickness direction thereof, and each battery cell 40 is placed upright on the bottom 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 and connected to the bottom plate 11 , thereby improving the installation reliability of each battery cell 40 , thereby improving the use reliability of the battery 100 .

[0121] Please refer to Figure 8 and Fig.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 a liquid cooling plate 50 between two adjacent battery cells 40, the liquid cooling plate 50 can exchange heat with the battery cells 40, take away the heat generated by the battery cells 40 when working, realize cooling treatment of the battery cells 40, and reduce damage caused by excessive temperature.

[0122] The battery cells 40 in the battery packs 60 are arranged opposite to each other in the first direction, the liquid cooling plates 50 in the battery packs 60 are arranged opposite to each other in the first direction in a one-to-one correspondence, and the liquid cooling plates 50 arranged opposite to each other in the battery packs 60 are an integrated structure. The liquid cooling plates 50 arranged opposite to each other can be formed as one piece, or can be connected together by welding, fasteners, or other connection methods.

[0123] In the above technical scheme, by arranging the multiple liquid cooling plates 50 arranged opposite to each other in the multiple battery groups 60 into an integrated structure, on the one hand, the connection structure of the multiple liquid cooling plates 50 arranged opposite to each other can be omitted, and the connection steps of the liquid cooling plates 50 and the multiple battery cells 40 are simplified, which is beneficial to improve 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 the multiple battery cells 40 and make the overall performance of the battery 100 better.

[0124] According to some embodiments of the present application, the present application further provides an electrical device 1000, comprising the battery cell 40 described in any of the above schemes, or comprising the battery 100 described in the above schemes, and the battery 100 is used to provide electrical energy to the electrical device 1000.

[0125] The power-consuming device 1000 may be any of the aforementioned devices or systems using the battery 100 .

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

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

[0128] The width direction of the box 101 is a first direction (the first direction is the X direction shown in the figure), the length direction of the box 101 is a second direction (the second direction is the Y direction shown in the figure), and the height direction of the box 101 is a third direction (the third direction is the Z direction shown in the figure). The box 101 includes a bottom plate 11, and the bottom plate 11 includes a plurality of support plates 111, and the plurality of support plates 111 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] A plurality of exhaust cavities 1101 and a plurality of overflow glue cavities 1104 are defined inside the support plate 111, each exhaust cavity 1101 and each overflow glue cavity 1104 extend along the first direction, and the plurality of exhaust cavities 1101 and the plurality of overflow glue cavities 1104 are alternately arranged in the second direction, and a plurality of exhaust hole groups 1103 and a plurality of overflow glue hole groups 1106 are provided on each support plate 111, the plurality of exhaust hole groups 1103 are arranged at intervals in the first direction, the plurality of overflow glue hole groups 1106 are arranged at intervals in the first direction, and the plurality of exhaust hole groups 1103 and the plurality of overflow glue hole groups 1106 are alternately arranged in the first direction, each exhaust hole group 1103 includes a plurality of exhaust holes 1102 and the plurality of exhaust holes 1102 are arranged at intervals in the second direction, and each overflow glue hole group 1106 includes a overflow glue hole 1105, and the overflow glue hole 1105 is arranged at intervals from the exhaust hole 1102 in the second direction. Each exhaust hole group 1103 is provided with protrusions 1121 on both sides in the second direction. The protrusions 1121 can be used to separate the adjacent exhaust hole groups 1103 from the glue overflow hole groups 1106 .

[0130] A plurality of battery cells 40 form a plurality of battery groups 60, and the plurality of battery groups 60 are arranged in the first direction. Each battery group 60 is connected to the bottom plate 11 by glue, and the glue can form an adhesive layer 12 after curing. Each battery group 60 includes a plurality of battery cells 40, and the plurality of battery cells 40 of each battery group 60 are arranged in the second direction. The plurality of battery cells 40 are arranged one by one directly above the plurality of exhaust holes 1102, so that the explosion-proof valve on each battery cell 40 is arranged directly opposite to the exhaust hole 1102 at the corresponding position. In each battery group 60, a glue overflow hole 1105 is provided in the space between two adjacent battery cells 40.

[0131] The two protrusions 1121 located on both sides of the exhaust hole group 1103 can block the excess glue between the battery cell 40 and the bottom plate 11 from entering the exhaust cavity 1101 from the exhaust hole 1102, and instead allow the excess glue to enter the glue overflow cavity 1104 from the glue overflow hole 1105, thereby reducing the probability of glue blocking the exhaust hole 1102. When the battery cell 40 has thermal runaway, the gas discharged from the explosion-proof valve can enter the exhaust cavity 1101 through the exhaust hole 1102 for pressure relief, thereby reducing the risk of combustion and explosion of the battery cell 40 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 the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A base plate, characterized in that: A support plate is included, wherein the support plate has a plurality of exhaust cavities and a plurality of exhaust holes, wherein the plurality of exhaust holes are arranged opposite to a plurality of battery cells of the battery and each of the exhaust holes is connected to at least one of the exhaust cavities; Wherein, the support plate further comprises a glue overflow cavity and a glue overflow hole, the glue overflow cavity is arranged separately from the exhaust cavity, and the glue overflow hole is arranged at intervals from the exhaust hole and is communicated with the glue overflow cavity.

2. The base plate 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; A projection of at least one of the glue overflow holes on a plane perpendicular to the first direction is located between projections of two adjacent exhaust holes in the exhaust hole group on the plane.

3. The base plate according to claim 2, characterized in that: At least one of the glue overflow holes is located between two adjacent exhaust hole groups.

4. The base plate according to claim 2 or 3, characterized in that: The glue overflow holes are multiple in number and divided into multiple glue overflow hole groups. The multiple glue overflow hole groups and the multiple exhaust hole groups are alternately arranged in the first direction, and each of the glue overflow hole groups includes at least one glue overflow hole.

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

6. The base plate according to claim 5, characterized in that There are multiple overflow glue cavities, multiple overflow glue cavities are arranged in the second direction, at least one overflow glue cavity is connected to the overflow glue hole, and multiple overflow glue cavities and multiple exhaust cavities are alternately arranged in the second direction.

7. The base plate according to any one of claims 2 to 6, characterized in that: A plurality of blocking parts are provided on the upper surface of the support plate, and the plurality of blocking parts correspond to the plurality of exhaust hole groups one by one; Each of the blocking portions includes two convex portions that are arranged opposite to each other in the first direction, each of the convex portions extends along the second direction, and the plurality of exhaust holes in each exhaust hole group are located between the two convex portions in the corresponding blocking portion.

8. The base plate according to any one of claims 2 to 7, characterized in that: The number of the support plate is one, or the number of the support plate is multiple and the multiple support plates are arranged side by side in the second direction.

9. The base plate according to any one of claims 1 to 8, characterized in that: The support plate comprises: a first plate portion and a second plate portion, wherein the first plate portion is disposed above the second plate portion; A plurality of 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 a plurality of the exhaust cavities and the overflow glue cavities, and the exhaust holes and the overflow glue holes pass through the first plate portion.

10. The base plate according to claim 9, characterized in that The support plate is an integrally formed part.

11. The base plate according to any one of claims 1 to 10, characterized in that: The cross-sectional area of ​​the overflow cavity is smaller than the cross-sectional area of ​​the exhaust cavity.

12. A battery box, characterized in that: Comprising a base plate according to any one of claims 1-11.

13. A battery, characterized in that: include: A box, wherein the box is a box of the battery according to claim 12; A plurality of battery cells are arranged in the box body and the bottom of each battery cell is connected to the upper surface of the bottom plate by glue. The plurality of exhaust holes are respectively located directly below the plurality of battery cells and are arranged opposite to the explosion-proof valves on the corresponding battery cells.

14. The battery according to claim 13, characterized in that At least a portion of the glue overflow hole is located directly below the space between two adjacent battery cells.

15. The battery according to claim 13 or 14, characterized in that: A plurality of the battery cells form a plurality of battery groups, the plurality of the battery groups are arranged in a first direction, each of the battery groups includes a plurality of the battery cells, and the plurality of the battery cells in each of the battery groups are arranged in a second direction; At least one of the glue overflow holes is located between two adjacent battery cells in the battery pack.

16. The battery according to claim 15, characterized in that The first direction and the second direction are perpendicular to each other and are perpendicular to the thickness direction of the bottom plate. The second direction is the thickness direction of the battery cell.

17. The battery according to claim 15 or 16, 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 glue overflow holes is located directly below the liquid cooling plate.

18. The battery according to claim 17, characterized in that The battery cells in the battery packs are arranged opposite to each other in the first direction, the liquid cooling plates in the battery packs are arranged opposite to each other in a one-to-one correspondence in the first direction, and the liquid cooling plates in the battery packs are an integrated structure.

19. An electrical device, characterized in that: Comprising a battery according to any one of claims 13-18.

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