Battery box body, battery and electric device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery box body, a battery and an electric device. According to the technical scheme, the first inner cavity is formed in the frame, the first foam heat preservation structure is arranged in the first inner cavity, and the first foam heat preservation structure has certain heat preservation performance, so that the heat preservation performance of the battery box body is improved. And under the condition that structural defects such as cracks occur in a certain part of the frame, the first foam heat preservation structure can also play a role in blocking water vapor. Therefore, the reliability of the battery box body is improved, and the reliability of the battery is further improved. In addition, as the first foam insulation structure is positioned in the first inner cavity of the frame, the internal space and the external space of the battery box body cannot be additionally occupied, and the space utilization rate of the battery box body is improved.

Description

Technical Field

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

[0002] In the development of battery technology, in addition to improving battery performance, the reliability of batteries is also an issue that cannot be ignored. If the reliability of batteries cannot be guaranteed, it will directly affect the reliability, use cost and user experience of terminal products. Therefore, how to enhance battery reliability is a technical problem that needs to be solved urgently in battery technology. Utility Model Content

[0003] Based on this, the present application provides a battery box, a battery and an electrical device, which can improve the reliability of the battery.

[0004] In a first aspect, the present application provides a battery box, comprising: a plate body; a frame surrounding the edge of the plate body and defining a accommodating cavity with the plate body; and a first foam insulation structure, the frame having a first inner cavity independent of the accommodating cavity, the first foam insulation structure being arranged in the first inner cavity.

[0005] In the technical solution of the embodiment of the present application, a first inner cavity is provided in the frame, and a first foam insulation structure is provided in the first inner cavity. Since the first foam insulation structure has certain insulation performance, the insulation performance of the battery case is improved. In the event that a structural defect such as a crack appears in a certain part of the frame, the first foam insulation structure can also play a role in blocking water vapor. Thus, the reliability of the battery case is improved, and then the reliability of the battery is improved. In addition, since the first foam insulation structure is located in the first inner cavity of the frame, it will not occupy additional internal and external space of the battery case, thereby improving the space utilization of the battery case.

[0006] In some embodiments, the first foam insulation structure is formed in the first inner cavity by a chemical foaming process.

[0007] In this way, the first foam insulation structure is manufactured by chemical foaming process, which can be more flexibly adapted to the structure of the frame, is easy to manufacture, and reduces production costs.

[0008] In some embodiments, a first glue injection hole communicating with the first inner cavity is provided on the frame; the first glue injection hole is used for injecting foam glue into the first inner cavity to form a first foam insulation structure.

[0009] In this way, by providing the first glue injection hole, the first foam heat-insulating structure can be flexibly manufactured according to the structure of the frame.

[0010] In some embodiments, the frame has a first surface disposed toward the accommodating cavity; and the first glue injection hole is disposed on the first surface.

[0011] Since the first glue injection hole is located on the first surface of the frame facing the accommodating cavity, the first glue injection hole can be located inside the battery box. Compared with the case where the first glue injection hole is located on other surfaces of the frame, it is not only convenient to inject foam glue through the first glue injection hole, but also can improve the appearance and sealing performance of the battery box, and further reduce the risk of water vapor penetration.

[0012] In some embodiments, the frame also has a second surface connected to the first surface, and the second surface and the plate body are spaced apart along the thickness direction of the plate body; along the thickness direction of the plate body, the distance between the first glue injection hole and the plate body is greater than the distance between the first glue injection hole and the second surface.

[0013] Since the first glue injection hole is arranged closer to the second surface, it is not only beneficial to manufacture the first foam insulation structure, but also beneficial to make the first foam insulation structure fill the first inner cavity as completely as possible.

[0014] In some embodiments, a plurality of first inner cavities are provided, and all the first inner cavities are independent of each other; a plurality of first glue injection holes are provided; and each first inner cavity is connected to at least one first glue injection hole.

[0015] Since there are multiple first inner cavities, that is, a partition structure is provided inside the frame, it is beneficial to further improve the structural strength of the frame.

[0016] In some embodiments, the frame includes a plurality of side structures connected end to end and arranged around the edge of the plate body; at least one side structure is provided with a first inner cavity and a first glue injection hole communicating with the first inner cavity.

[0017] By configuring the frame to have a structure including a plurality of edge structures, it is facilitated to manufacture and assemble the frame.

[0018] In some embodiments, the diameter of the first glue injection hole is 5 mm to 20 mm.

[0019] In this way, by controlling the aperture of the first glue injection hole, not only is it convenient to inject the foam glue, but it is also beneficial for the foam glue to be contained in the first inner cavity.

[0020] In some embodiments, the battery case also includes a partition and a second foam insulation structure; the partition is at least partially located in the accommodating cavity and is connected to the frame, the partition divides the accommodating cavity into a plurality of sub-chambers, and the partition has a second inner cavity independent of the sub-chambers; the second foam insulation structure is disposed in the second inner cavity.

[0021] By providing a separator, not only can the accommodating cavity be divided into multiple sub-chambers according to usage requirements, but also the structural strength of the battery box can be further improved. Since the second foam insulation structure is provided in the separator, the internal space of the separator can be further utilized, which is conducive to further improving the insulation performance of the battery box.

[0022] In some embodiments, the second foam insulation structure is formed in the second inner cavity by a chemical foaming process.

[0023] In this way, the second foam insulation structure is manufactured by chemical foaming process, which can be more flexibly adapted to the structure of the partition, is easy to manufacture, and reduces production costs.

[0024] In some embodiments, a second glue injection hole communicating with the second inner cavity is provided on the partition, and the second glue injection hole is used for injecting foam glue into the second inner cavity to form a second foam insulation structure.

[0025] In this way, by providing the second glue injection hole, the second foam heat-insulating structure can be flexibly manufactured according to the structure of the partition.

[0026] In some embodiments, the partition has a first side surface disposed toward the plurality of sub-chambers; and the second glue injection hole is disposed on the first side surface.

[0027] In this way, it is convenient to perform the hole-making operation after assembling the corresponding parts of the battery box to form the second glue injection hole.

[0028] In some embodiments, the separator also has a third surface connected to the first side surface, and the third surface is spaced apart from the plate body along the thickness direction of the plate body; along the thickness direction of the plate body, the distance between the second glue injection hole and the plate body is greater than the distance between the second glue injection hole and the third surface.

[0029] Since the second glue injection hole is arranged closer to the third surface, it is not only beneficial to manufacture the second foam insulation structure, but also beneficial to make the second foam insulation structure fill the second inner cavity as completely as possible.

[0030] In some embodiments, the partition is provided with multiple second inner cavities, and all second inner cavities are independent; multiple second glue injection holes are provided; each second inner cavity is connected to at least one second glue injection hole; and / or the aperture of the second glue injection hole is 5 mm to 20 mm.

[0031] Since there are multiple second inner cavities, that is, a partition structure is provided inside the partition, the structural strength of the partition is further improved. By controlling the aperture of the second injection hole, it is not only convenient to inject the foam glue, but also convenient to accommodate the foam glue in the second inner cavity.

[0032] In some embodiments, the material of the second foam insulation structure includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone.

[0033] Since the second foam insulation structure formed by using single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone or two-component foamed silicone has a certain hardness, it can further improve the structural strength of the battery box. Therefore, by flexibly selecting the material of the second foam insulation structure, the performance requirements of the second foam insulation structure under different usage requirements can be met.

[0034] In some embodiments, the board body has a third inner cavity that is independent of the accommodating cavity; the battery box body also includes a third foam insulation structure disposed in the third inner cavity.

[0035] By providing the third foam insulation structure in the board body, the internal space of the board body can be further utilized, and the insulation performance of the battery box can be further improved.

[0036] In some embodiments, the third foam insulation structure is formed in the third inner cavity by a chemical foaming process; and / or, the material of the third foam insulation structure includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone.

[0037] In this way, the third foam insulation structure is made through the chemical foaming process, which can be more flexibly adapted to the structure of the board, facilitates production, and reduces production costs. Since the third foam insulation structure formed by single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone or two-component foamed silicone has a certain hardness, it can further improve the structural strength of the battery box. Therefore, by flexibly selecting the material of the third foam insulation structure, the performance requirements of the third foam insulation structure under different usage requirements can be met.

[0038] In some embodiments, along the thickness direction of the board body, the ratio of the size of the first foam insulation structure to the size of the first inner cavity is 0.9 to 1; and / or, the material of the first foam insulation structure includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone.

[0039] By controlling the size of the first foam insulation structure, it is helpful to further improve the insulation performance. Since the first foam insulation structure is formed by a single-component foamed polyurethane, a two-component foamed polyurethane, a single-component foamed silicone or a two-component foamed silicone, the structural strength of the battery box can be further improved. Therefore, by flexibly selecting the material of the first foam insulation structure, the performance requirements of the first foam insulation structure under different usage requirements can be met.

[0040] In a second aspect, the present application provides a battery, comprising a battery box in any of the above embodiments.

[0041] In a third aspect, the present application provides an electrical device, comprising a battery in any of the above embodiments.

[0042] 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

[0043] 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:

[0044] Figure 1 A schematic diagram of the structure of a vehicle in some embodiments of the present application;

[0045] Figure 2 Schematic diagram of the exploded structure of the battery in some embodiments of the present application;

[0046] Figure 3 This is a schematic diagram of the structure of a battery module in some embodiments of the present application;

[0047] Figure 4 A schematic diagram of the exploded structure of a battery cell in some embodiments of the present application;

[0048] Figure 5 It is a three-dimensional schematic diagram of a partial structure of a battery box in some embodiments of the present application;

[0049] Figure 6 A schematic diagram of a cross-sectional structure of a part of the frame in some embodiments of the present application at a viewing angle;

[0050] Figure 7 for Figure 5 A schematic diagram of the local enlarged structure at point A in the middle;

[0051] Figure 8 A schematic cross-sectional view of a partial structure of a frame in some embodiments of the present application at another viewing angle;

[0052] Fig. 9 A schematic diagram of a three-dimensional structure of a partial structure of a frame in some embodiments of the present application;

[0053] Fig.10for Figure 5 A schematic diagram of a top view of a portion of the structure of a battery box;

[0054] Fig.11 for Figure 5 A schematic diagram of the local enlarged structure at B in the middle;

[0055] Fig.12 This is a schematic diagram of a cross-sectional structure of a separator in some embodiments of the present application at a viewing angle;

[0056] Fig.13 This is a schematic diagram of a cross-sectional structure of a separator in some embodiments of the present application at another viewing angle;

[0057] Fig.14 It is a schematic diagram of a three-dimensional structure of a partial structure of a separator in some embodiments of the present application;

[0058] Fig.15 It is a three-dimensional schematic diagram of a partial structure of a battery box in some other embodiments of the present application;

[0059] Fig.16 for Fig.15 A schematic diagram of a top view of a portion of the structure of a battery box;

[0060] Fig.17 It is a three-dimensional schematic diagram of a partial structure of a battery box in some other embodiments of the present application;

[0061] Fig.18 for Fig.17 A schematic diagram of a top view of a portion of the structure of a battery box;

[0062] Fig.19 It is a schematic diagram of the cross-sectional structure of the plate body in some embodiments of the present application.

[0063] The reference numerals in the specific implementation manner are as follows:

[0064] Vehicle 1, battery 10, controller 20, motor 30;

[0065] Battery module 100, battery cell 110, end cap 111, electrode terminal 111a, housing 112, electrode assembly 113;

[0066] Battery box 200, first part 210, second part 220, plate 221, frame 222, edge structure 222a, first surface b1, second surface b2, first foam insulation structure 223, partition 224, first side surface c1, third surface b3, second foam insulation structure 225, third foam insulation structure 226, connector 227;

[0067] Accommodating chamber Q, sub-chamber Q1, first inner chamber N1, first glue injection hole k1, second inner chamber N2, second glue injection hole k2, third inner chamber N3;

[0068] A first aperture d1, a second aperture d2, a first size h1, a second size h2, a third size h3, and a fourth size h4;

[0069] The first direction F1, the second direction F2, and the third direction F3. DETAILED DESCRIPTION

[0070] The following embodiments of the technical solution of the present application are 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. 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.

[0075] 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).

[0076] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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.

[0077] 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.

[0078] 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.

[0079] In a low temperature environment (such as a winter environment), the electrochemical reaction rate inside the battery will slow down, which will cause the battery's working performance to deteriorate, affecting the battery's reliability and thus affecting the use of electrical devices.

[0080] In order to improve the problem of the reliability of the battery structure being affected by the use environment, the embodiment of the present application improves the working performance of the battery by improving the thermal insulation performance of the battery box, thereby improving the reliability of the battery. Specifically, by setting a thermal insulation structure in the cavity within the frame of the battery box, the thermal insulation performance of the battery box is improved.

[0081] Based on this, in order to improve the problem that the reliability of the battery structure is affected by the use environment, an embodiment of the present application provides a battery case, which improves some of the aforementioned problems by improving the thermal insulation performance of the battery case.

[0082] The battery box disclosed in the embodiment of the present application is used for batteries, and the batteries can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. A power supply system of the electrical device can be composed of the battery disclosed in the present application and other components, which is conducive to improving the problem of battery reliability affected by the use environment.

[0083] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may 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, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0084] 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.

[0085] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1 provided for some embodiments of the present application. The vehicle 1 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 10 is provided inside the vehicle 1, and the battery 10 may be provided at the bottom, head or tail of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1. The vehicle 1 may also include a controller 20 and a motor 30, and the controller 20 is used to control the battery 10 to power the motor 30, for example, for starting, navigating and operating power requirements of the vehicle 1 during driving.

[0086] In some embodiments of the present application, the battery 10 can be used not only as an operating power source for the vehicle 1 , but also as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0087] In order to meet different power requirements, the battery 10 may include a plurality of battery cells 110, where the battery cell 110 refers to the smallest unit that constitutes the battery module 100 or the battery pack. The plurality of battery cells 110 can be connected in series and / or in parallel via the electrode terminals 111a for use in various applications. The battery mentioned in the present application includes a battery module 100 or a battery pack. Among them, the plurality of battery cells 110 can be connected in series, in parallel, or in mixed connection, where mixed connection refers to a mixture of series and parallel connection. The battery 10 may also be referred to as a battery pack. In the embodiment of the present application, the plurality of battery cells 110 may directly constitute a battery pack, or may first constitute a battery module 100, which may then constitute a battery pack.

[0088] Please refer to Figure 2 , Figure 2 FIG. 1 is a schematic structural diagram of a battery 10 according to an embodiment of the present application. Figure 2 In the embodiment, the battery 10 may include a plurality of battery modules 100 and a case 200, and the plurality of battery modules 100 are contained inside the case 200. The case 200 is used to contain the battery cells 110 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 110. The case 200 may be a simple three-dimensional structure such as a single cuboid, cylinder or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders or spheres, which is not limited in the embodiments of the present application. The material of the case 200 may be an alloy material such as aluminum alloy, iron alloy, or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiments of the present application.

[0089] In some embodiments, the box body 200 may include a first portion 210 and a second portion 220, the first portion 210 and the second portion 220 cover each other, and the first portion 210 and the second portion 220 jointly define a space for accommodating the battery cell 110. The second portion 220 may be a hollow structure with one end open, and the first portion 210 may be a plate-like structure, and the first portion 210 covers the open side of the second portion 220, so that the first portion 210 and the second portion 220 jointly define a space for accommodating the battery cell 110. The first portion 210 and the second portion 220 may also be hollow structures with one side open, and the open side of the first portion 210 covers the open side of the second portion 220.

[0090] Please refer to Figure 3 , Figure 3 FIG. 1 is a schematic structural diagram of a battery module 100 according to an embodiment of the present application. Figure 3 In the embodiment, the battery module 100 may include a plurality of battery cells 110, and the plurality of battery cells 110 may be connected in series, in parallel, or in a mixed connection to form the battery module 100, and the plurality of battery modules 100 may be connected in series, in parallel, or in a mixed connection to form the battery 10. In the present application, the battery cell 110 may include a lithium-ion battery 10, a sodium-ion battery 10, or a magnesium-ion battery 10, etc., which is not limited in the embodiments of the present application. The battery cell 110 may be in a cylindrical, flat, rectangular, or other shape, etc., which is not limited in the embodiments of the present application. The battery cell 110 may be in a cylindrical, flat, rectangular, or other shape, etc., which is not limited in the embodiments of the present application. However, for the sake of simplicity of description, the following embodiments are all described using the cubic square battery cell 110 as an example.

[0091] Please refer to Figure 4 , Figure 4The schematic diagram of the decomposition structure of the battery cell 110 provided in some embodiments of the present application. The battery cell 110 refers to the smallest unit constituting the battery 10. Figure 4 The battery cell 110 includes an end cover 111, a shell 112, an electrode assembly 113 and other functional components.

[0092] The end cap 111 refers to a component that covers the opening of the shell 112 to isolate the internal environment of the battery cell 110 from the external environment. Without limitation, the shape of the end cap 111 can be adapted to the shape of the shell 112 to match the shell 112. Optionally, the end cap 111 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 111 is not easily deformed when it is squeezed and collided, so that the battery cell 110 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 111a can be provided on the end cap 111. The electrode terminal 111a can be used to electrically connect to the electrode assembly 113 for outputting or inputting electrical energy of the battery cell 110. In some embodiments, the end cap 111 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 110 reaches a threshold. In some embodiments, the end cap 111 can also be provided with a liquid injection hole for injecting electrolyte into the interior of the battery cell 110. The material of the end cap 111 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the present embodiment. In some embodiments, an insulating member can be provided on the inner side of the end cap 111, and the insulating member can be used to isolate the electrical connection components in the housing 112 from the end cap 111 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0093] The shell 112 is a component used to cooperate with the end cap 111 to form the internal environment of the battery cell 110, wherein the formed internal environment can be used to accommodate the electrode assembly 113, the electrolyte (not shown in the figure) and other components. The shell 112 and the end cap 111 can be independent components, and an opening can be set on the shell 112, and the internal environment of the battery cell 110 is formed by covering the opening with the end cap 111 at the opening. Without limitation, the end cap 111 and the shell 112 can also be integrated. Specifically, the end cap 111 and the shell 112 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 112, the end cap 111 covers the shell 112. The shell 112 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 112 can be determined according to the specific shape and size of the electrode assembly 113. The shell 112 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0094] The electrode assembly 113 is a component in the battery cell 110 where an electrochemical reaction occurs. One or more electrode assemblies 113 may be included in the housing 112. The electrode assembly 113 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 113, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear (not shown in the figure). The positive pole ear and the negative pole ear may be located at one end of the main body or at both ends of the main body respectively. During the charge and discharge process of the battery 10, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ear connects the electrode terminal 111a to form a current loop. The separator is used to isolate the positive electrode sheet and the negative electrode sheet, and prevent the electrons in the battery cell 110 from passing freely, allowing the ions in the electrolyte to flow freely between the positive electrode sheet and the negative electrode sheet. The spacer may be a film made of materials such as PE (polyethylene) and PP (polypropylene).

[0095] According to some embodiments of this application, please refer to Figure 5 , Figure 5 Schematic diagram of a portion of the structure of the battery box 200 in some embodiments of the present application. Figure 5 The second part 220 of the battery case 200 shown in some of the above embodiments is shown in FIG. Of course, the first part 210 of the battery case 200 shown in some of the above embodiments can also be set as follows according to actual use requirements. Figure 5 The structure shown is not specifically limited in the embodiments of the present application.

[0096] As shown in the figure, the first direction F1 in the figure is the height direction of the battery box 200, the second direction F2 is the length direction of the battery box 200, and the third direction F3 is the length direction of the battery box 200. The first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. It can be understood that the first direction F1, the second direction F2 and the third direction F3 are only for the convenience of explanation, and are not intended to limit the embodiments of the present application.

[0097] According to some embodiments of this application, please continue to refer to Figure 5 , and combined with reference Figure 6 , Figure 6 The schematic cross-sectional view of a portion of the frame 222 in some embodiments of the present application at a certain viewing angle is shown in FIG.

[0098] The plate body 221 is a plate-shaped component. The thickness direction of the plate body 221 is the first direction F1. Figure 5In the case where the structure shown is the second part 220 of the battery box 200, the plate 221 is used as a bottom plate for supporting the components disposed in the battery box 200. Figure 5 When the structure shown is used as the first part 210 of the battery case 200 , the plate 221 can be regarded as a top plate.

[0099] The frame 222 refers to a component provided in a frame. The material of the frame 222 can have both certain rigidity and certain deformability to meet the use environment and lightweight requirements of the battery. The material of the frame 222 can be a metal that is easier to process, such as aluminum and steel. The frame 222 can be an integrated structure or a structure assembled in parts. The frame 222 can be formed using a related beam structure.

[0100] The frame 222 is arranged around the edge of the plate body 221 and defines a receiving cavity Q with the plate body 221. The receiving cavity Q is used to place the battery cell 110. The frame 222 has a first surface b1 arranged facing the receiving cavity Q, and the first surface b1 can be regarded as the inner side of the frame 222. Of course, the frame 222 can also have an outer side arranged opposite to the first surface b1. The outer side of the frame 222 is relative to the inner side of the frame 222, and the outer side of the frame 222 can be regarded as the surface of the battery box 200 facing the outside. In the case where the plate body 221 is used as a bottom plate, the plate body 221 has a top surface (not shown) arranged facing the receiving cavity Q, and the top surface of the plate body 221 and the first surface b1 of the frame 222 together constitute the inner wall of the receiving cavity Q. In the case where the plate body 221 is used as a top plate, the plate body 221 has a bottom surface arranged facing the receiving cavity Q, and the bottom surface of the plate body 221 and the first surface b1 of the frame 222 together constitute the inner wall of the receiving cavity Q.

[0101] The frame 222 has a first inner cavity N1 which is independent of the accommodating cavity Q. The first inner cavity N1 refers to the space formed by the surface inside the frame 222. The provision of the first inner cavity N1 can help reduce the weight of the frame 222. Figure 5 , the first inner cavity N1 of the frame 222 can be roughly regarded as being outside the accommodating cavity Q.

[0102] The first foam insulation structure 223 refers to a foam insulation structure formed by a foaming process using a foaming material. The foaming process includes a physical foaming process and a chemical foaming process. The specific formation process can be set according to the use requirements and is not specifically limited here. The first foam insulation structure 223 is arranged in the first inner cavity N1. That is, the first foam insulation structure 223 is filled in the first inner cavity N1. Among them, the first foam insulation structure 223 can fill the entire first inner cavity N1, or it can fill part of the first inner cavity N1.

[0103] Therefore, by setting the first inner cavity N1 in the frame 222 and setting the first foam insulation structure 223 in the first inner cavity N1, since the first foam insulation structure 223 has certain insulation performance, the insulation performance of the battery case 200 is improved. In the event that a structural defect such as a crack appears in a certain part of the frame 222, the first foam insulation structure 223 can also play a role in blocking water vapor. As a result, the reliability of the battery case 200 is improved, and the reliability of the battery is improved. In addition, since the first foam insulation structure 223 is located in the first inner cavity N1 of the frame 222, it will not occupy the internal space and external space of the battery case 200, thereby improving the space utilization of the battery case 200.

[0104] According to some embodiments of this application, please continue to refer to Figure 5 and Figure 6 The first foam insulation structure 223 is formed in the first inner cavity N1 through a chemical foaming process.

[0105] It is understandable that if a physical foaming process is used to form the first foam insulation structure 223, it is necessary to first make the first foam insulation structure 223 and then place the first foam insulation structure 223 in the first inner cavity N1 of the frame 222. Not only does it have certain requirements for the shape of the first inner cavity N1 of the frame 222, it is also difficult to place the first foam insulation structure 223 in the first inner cavity N1, and it is also difficult for the first foam insulation structure 223 to fit well with the inner wall of the first inner cavity N1. In the embodiment of the present application, a chemical foaming process is used to form the first foam insulation structure 223, which can be formed in the first inner cavity N1 of the frame 222, and the first foam insulation structure 223 after forming can better fit with the inner wall of the first inner cavity N1, and is better adapted to the shape of the first inner cavity N1 of the frame 222.

[0106] It should be noted that the specific process of the chemical foaming process can be adjusted according to specific usage requirements and will not be described in detail here.

[0107] In this way, the first foam insulation structure 223 is manufactured by chemical foaming process, which can be more flexibly adapted to the structure of the frame 222, is easy to manufacture, and reduces production costs.

[0108] According to some embodiments of this application, please continue to refer to Figure 5 and Figure 6 , and combined with reference Figure 7 , Figure 7 for Figure 5 In the partial enlarged structural diagram at A in the middle, a first glue injection hole k1 communicating with the first inner cavity N1 is provided on the frame 222. The first glue injection hole k1 is used for injecting foam glue into the first inner cavity N1 to form a first foam insulation structure 223.

[0109] The foam glue is a material used to form the first foam insulation structure 223. The foam glue can be a single-component foam glue or a two-component foam glue. In the case where the foam glue is a two-component foam glue, the foam glue can be a two-component silicone foam glue or a two-component polyurethane foam glue. In the embodiment of the present application, a two-component polyurethane foam glue can be selected as the foam glue, which not only has excellent thermal insulation performance but also can reduce the production cost. The material of the foam glue can be set according to the specific use requirements, and no specific restrictions are made here.

[0110] The position of the first glue injection hole k1 can be set according to the structure of the frame 222, the state in which the frame 222 is placed, and whether the frame 222 is assembled with the plate body 221. For example, when the frame 222 is a structure assembled in parts and is not assembled, the structure constituting a part of the frame 222 can be a beam structure, which has a first inner cavity N1 and a first glue injection hole k1 connected to the first inner cavity N1. The first glue injection hole k1 can be arranged at both ends of the beam structure along the longitudinal direction, or can be arranged on each surface of the beam structure. For another example, when the frame 222 is a structure assembled in parts and has been assembled or the frame 222 is an integrated structure, the first glue injection hole k1 can be arranged on the surface of the frame 222 corresponding to the first inner cavity N1. For another example, when the frame 222 is assembled with the plate body 221, the first glue injection hole k1 can be arranged on the outer side surface, inner side surface or other surface of the frame 222 mentioned above. The number and shape of the first glue injection holes k1 can be set accordingly according to the determined positions of the first glue injection holes k1 , as long as the first foam insulation structure 223 can be formed, and no specific limitation is made here.

[0111] It should be noted that the first foam insulation structure 223 has a portion exposed through the first glue injection hole k1, and the exposed portion can be convex relative to the first glue injection hole k1, can be concave relative to the first glue injection hole k1, or can be flush with the first glue injection hole k1. Figure 7 For example, the exposed portion is shown to be flush with the first glue injection hole k1. The shape of the exposed portion can be controlled by the chemical foaming process, and the exposed portion at the first glue injection hole k1 can be processed or not processed according to the needs after the first foam insulation structure 223 is formed, and no specific limitation is made here. That is to say, after the first foam insulation structure 223 is formed by the chemical foaming process, the first glue injection hole k1 can be substantially blocked by the first foam insulation structure 223.

[0112] It is understandable that when multiple first glue injection holes k1 are needed, after the frame 222 and the plate body 221 are assembled, the first glue injection holes k1 are set on the corresponding surface of the frame 222 to facilitate the processing of the first glue injection holes k1 and improve production efficiency.

[0113] In this way, by setting the first glue injection hole k1, the first foam heat-insulating structure 223 can be flexibly manufactured according to the structure of the frame 222.

[0114] According to some embodiments of this application, please continue to refer to Figures 5 to 7 The frame 222 has a first surface b1 disposed toward the accommodating cavity Q, and the first glue injection hole k1 is disposed on the first surface b1.

[0115] Of course, in some other embodiments, the first glue injection hole k1 may also be located on the outer side of the frame 222, or on the second surface b2 of the frame 222, and the second surface b2 is arranged along the first direction F1 and is spaced apart from the plate 221. It can be understood that since the outer side of the frame 222 is located on the outer surface of the battery case 200, the first glue injection hole k1 will be exposed to the outside, which will lead to poor appearance of the battery case 200 and the risk of water vapor infiltration. The second surface b2 of the frame 222 will contact with other parts of the battery case 200, and together constitute a closed space in the battery case 200. If the first glue injection hole k1 is opened on the second surface b2 of the frame 222, the sealing performance will need to be further improved.

[0116] In the embodiment of the present application, since the first glue injection hole k1 is located on the first surface b1 of the frame 222 facing the accommodating cavity Q, the first surface b1 can be regarded as the inner side of the frame 222, so that the first glue injection hole k1 can be located inside the battery case 200, which is not only convenient for injecting foam glue through the first glue injection hole k1, but also can improve the appearance and sealing performance of the battery case 200, and further reduce the risk of water vapor penetration. Therefore, compared with the situation where the first glue injection hole k1 is located on other surfaces of the frame 222, setting the first glue injection hole k1 on the first surface b1 of the frame 222 makes the battery case 200 more reliable.

[0117] According to some embodiments of this application, please continue to refer to Figures 5 to 7 The frame 222 also has a second surface b2 connected to the first surface b1, and the second surface b2 is spaced apart from the plate body 221 along the thickness direction of the plate body 221. That is, the second surface b2 is arranged along the first direction F1 and is spaced apart from the plate body 221. Along the thickness direction of the plate body 221, the spacing between the first glue injection hole k1 and the plate body 221 is greater than the spacing between the first glue injection hole k1 and the second surface b2. That is, the first glue injection hole k1 is arranged closer to the second surface b2.

[0118] During the glue injection process, the plate 221 can be laid flat first. Since the first glue injection hole k1 is arranged closer to the second surface b2, the height of the first glue injection hole k1 is higher, and more foam glue can be injected into the first inner cavity N1. This is not only conducive to making the first foam insulation structure 223, but also conducive to making the first foam insulation structure 223 fill the first inner cavity N1 as completely as possible.

[0119] Of course, in some other embodiments, according to the use requirements, along the thickness direction of the plate body 221, the distance between the first glue injection hole k1 and the plate body 221 may be equal to or less than the distance between the first glue injection hole k1 and the second surface b2. It is understandable that when the first glue injection hole k1 is arranged closer to the second surface b2, it is more conducive to glue injection and injection of more foam glue.

[0120] According to some embodiments of this application, please continue to refer to Figure 5 , and combined with reference Figure 8 and Fig. 9 , Figure 8 2 is a schematic cross-sectional view of a portion of the frame 222 in some embodiments of the present application at another viewing angle. Fig. 9 The 3D structure diagram of the partial structure of the frame 222 in some embodiments of the present application shows that there are multiple first inner cavities N1, and all the first inner cavities N1 are independent of each other. There are multiple first glue injection holes k1, and each first inner cavity N1 is connected to at least one first glue injection hole k1.

[0121] Each first inner cavity N1 is connected to at least one first glue injection hole k1, which means that the number of first glue injection holes k1 connected to the first inner cavity N1 can be one or more. That is, the number of first glue injection holes k1 is greater than or equal to the number of first inner cavities N1, which can be set according to the use requirements and the process, and is not specifically limited here.

[0122] For example, Figure 8 and Fig. 9 For example, Figure 8 It shows that two first inner cavities N1 are provided in a part of the frame 222. Fig. 9 The dotted line in the figure indicates the boundary between the two first inner cavities N1. Fig. 9 It illustrates a situation where the two first inner cavities N1 are connected to the two first glue injection holes k1 in a one-to-one correspondence.

[0123] Since the first inner cavity N1 is provided with a plurality of Figure 8As shown, a partition structure (not shown) is provided inside the frame 222. For example, the partition structure can be provided in a plate shape, and the partition structure can also be provided in plurality, and the frame 222 can be divided into a plurality of first inner chambers N1 by the partition structure, and all the first inner chambers N1 are provided around the accommodation chamber Q. For example, Fig.10 For example, Fig.10 for Figure 5 The schematic diagram of the top view of the partial structure of the battery box 200 is shown in FIG. Fig.10 In the figure, the dotted line with an arrow indicates the position of the first injection hole k1. Fig.10 It illustrates that eight first glue injection holes k1 are provided, and the eight first glue injection holes k1 are provided around the accommodating cavity Q. Accordingly, each first glue injection hole k1 can be connected to a first inner cavity N1, that is, eight first inner cavities N1 can be provided in the frame 222, and the eight first inner cavities N1 are provided around the accommodating cavity Q.

[0124] Therefore, by configuring the frame 222 to have a structure with a plurality of first inner cavities N1 , it is beneficial to further improve the structural strength of the frame 222 .

[0125] According to some embodiments of this application, please continue to refer to Figure 5 and Fig.10 The frame 222 includes a plurality of side structures 222a connected end to end and arranged around the edge of the plate body 221; at least one side structure 222a is provided with a first inner cavity N1 and a first glue injection hole k1 communicating with the first inner cavity N1. The side structure 222a can be set as a beam structure, that is, the side structure 222a is substantially a longitudinal member. The number of side structures 222a can be set according to usage requirements.

[0126] In the embodiment of the present application, Figure 5 and Fig.10 For example, a situation where four side structures 222a are provided is illustrated, and the four side structures 222a are all provided with a first inner cavity N1 and a first glue injection hole k1. Two of the side structures 222a are relatively arranged along the third direction F3, and the other two side structures 222a are relatively arranged along the second direction F2. One of the other two side structures 222a can be provided with a bending section protruding along the second direction F2, so that a space for installing the rest of the battery box 200 can be formed.

[0127] By configuring the frame 222 to include a plurality of edge structures 222 a , it is facilitated to manufacture and assemble the frame 222 .

[0128] According to some embodiments of this application, please continue to refer to Figure 6, the aperture of the first glue injection hole k1 is 5 mm to 20 mm. That is, the aperture of the first glue injection hole k1 is the first aperture d1, and the first aperture d1 is 5 mm to 20 mm. Exemplarily, the first aperture d1 can be 5 mm, 6 mm, 8 mm, 10 mm, 13 mm, 15 mm, 18 mm, 19 mm or 20 mm. The size of the first aperture d1 can be determined according to the shape of the first glue injection hole k1. For example, when the shape of the first glue injection hole k1 is circular, the first aperture d1 is the diameter. For another example, when the shape of the first glue injection hole k1 is rectangular, there are multiple first apertures d1, and the smallest first aperture d1 and the largest aperture are both in the range of 5 mm to 20 mm.

[0129] In this way, by controlling the aperture of the first glue injection hole k1 , not only the injection of the foam glue is facilitated, but also the foam glue can be contained in the first inner cavity N1 .

[0130] According to some embodiments of this application, please continue to refer to Figure 5 , and combined with reference Fig.11 and Fig.12 , Fig.11 for Figure 5 The local enlarged structural diagram at B in the middle, Fig.12 The schematic diagram of the cross-sectional structure of the separator 224 in some embodiments of the present application at a viewing angle is shown. The battery box 200 further includes a separator 224 and a second foam insulation structure 225. The separator 224 is at least partially located in the accommodating cavity Q and connected to the frame 222. The separator 224 divides the accommodating cavity Q into a plurality of sub-cavities Q1. The separator 224 has a second inner cavity N2 that is independent of the sub-cavity Q1. The second foam insulation structure 225 is disposed in the second inner cavity N2.

[0131] The second foam insulation structure 225 can be understood with reference to the first foam insulation, and the second inner cavity N2 can be understood with reference to the first inner cavity N1, which will not be repeated here. The materials of the first foam insulation structure 223 and the second foam insulation structure 225 can be the same or different. The partition 224 can be set as a beam structure, and the two ends of the partition 224 along its own longitudinal direction can be respectively connected to different parts of the frame 222. Among all the sub-chambers Q1, a part of the sub-chamber Q1 can be used to accommodate battery cells 110, and a part of the sub-chamber Q1 can be used to accommodate other components or other related parts in the battery box 200.

[0132] By providing the partition 224, not only can the accommodating chamber Q be divided into a plurality of sub-chambers Q1 according to the use requirements, but also the structural strength of the battery box 200 can be further improved. Since the second foam insulation structure 225 is provided in the partition 224, the internal space of the partition 224 can be further utilized, which is conducive to further improving the insulation performance of the battery box 200.

[0133] According to some embodiments of this application, please continue to refer to Fig.12 The second foam insulation structure 225 is formed in the second inner cavity N2 by a chemical foaming process. Of course, in some other embodiments, the second foam insulation structure 225 can also be formed in the second inner cavity N2 by a physical foaming process.

[0134] In this way, the second foam insulation structure 225 is manufactured by chemical foaming process, which can be more flexibly adapted to the structure of the partition 224, is easy to manufacture, and reduces production costs.

[0135] According to some embodiments of this application, please continue to refer to Fig.11 and Fig.12 The partition 224 is provided with a second glue injection hole k2 in communication with the second inner cavity N2, and the second glue injection hole k2 is used for injecting foam glue into the second inner cavity N2 to form a second foam insulation structure 225. The number and position of the second glue injection holes k2 can be understood with reference to the first glue injection holes k1 illustrated in some of the aforementioned embodiments, and will not be described in detail here. The foam glue injected into the second inner cavity N2 can be understood with reference to the foam glue injected into the first inner cavity N1, and will not be described in detail here.

[0136] In this way, by setting the second glue injection hole k2, the second foam insulation structure 225 can be flexibly manufactured according to the structure of the partition 224. In the case where a plurality of first glue injection holes k1 are provided on the frame 222, the first glue injection holes k1 and the second glue injection holes k2 can be formed after the frame 222, the plate body 221 and the partition 224 are assembled, thereby further improving production efficiency.

[0137] According to some embodiments of this application, please continue to refer to Fig.11 and Fig.12 The partition 224 has a first side surface c1 facing the plurality of sub-chambers Q1, and the second glue injection hole k2 is disposed on the first side surface c1. According to the structure of the partition 224, the partition 224 may have a plurality of first side surfaces c1, and at least one first side surface c1 may be provided with a second glue injection hole k2. The configuration may be performed according to specific use requirements, and no specific limitation is made here.

[0138] In this way, it is convenient to perform a hole-drilling operation after the corresponding parts of the battery box 200 are assembled to form the second glue injection hole k2.

[0139] According to some embodiments of this application, please continue to refer to Fig.11 and Fig.12The separator 224 also has a third surface b3 connected to the first side surface c1, and the third surface b3 is spaced apart from the plate body 221 along the thickness direction of the plate body 221. Along the thickness direction of the plate body 221, the distance between the second glue injection hole k2 and the plate body 221 is greater than the distance between the second glue injection hole k2 and the third surface b3.

[0140] During the glue injection process, the plate 221 can be laid flat first. Since the second glue injection hole k2 is arranged closer to the third surface b3, the height of the second glue injection hole k2 is higher, and more foam glue can be injected into the second inner cavity N2. This is not only conducive to making the second foam insulation structure 225, but also conducive to making the second foam insulation structure 225 as completely filled in the second inner cavity N2 as possible.

[0141] Of course, in some other embodiments, according to the use requirements, along the thickness direction of the plate body 221, the distance between the second glue injection hole k2 and the plate body 221 may be equal to or less than the distance between the second glue injection hole k2 and the third surface b3. It can be understood that when the first glue injection hole k1 is arranged closer to the third surface b3, it is more conducive to glue injection and injection of more foam glue.

[0142] For another example, in some other embodiments, the second glue injection hole k2 may be provided on the third surface b3. In the case where the first glue injection hole k1 is provided on the first surface b1 of the frame 222, the second glue injection hole k2 is provided on the first side surface c1 of the partition 224, which is more conducive to the opening operation of the frame 222 and the partition 224, thereby facilitating processing and manufacturing.

[0143] According to some embodiments of this application, please continue to refer to Figure 5 , and combined with reference Fig.13 and Fig.14 , Fig.13 2 is a schematic cross-sectional view of the separator 224 in some embodiments of the present application at another viewing angle. Fig.14 Schematic diagram of a three-dimensional structure of a part of the structure of the separator 224 in some embodiments of the present application, the separator 224 is provided with a plurality of second inner cavities N2, and all the second inner cavities N2 are independent. A plurality of second glue injection holes k2 are provided. Each second inner cavity N2 is connected to at least one second glue injection hole k2.

[0144] Each second inner cavity N2 is connected to at least one second glue injection hole k2, which means that the number of first glue injection holes k1 connected to the second inner cavity N2 can be one or more. That is, the number of second glue injection holes k2 is greater than or equal to the number of second inner cavities N2, which can be set according to the use requirements and the process, and is not specifically limited here.

[0145] For example, Fig.13 and Fig.14 For example, Fig.13 The diagram shows a situation where two second inner cavities N2 are provided in a part of the structure of the partition 224. Fig.14 The dotted line in the figure indicates the boundary between the two second inner cavities N2. Fig.14 It illustrates the situation that the two second inner cavities N2 are connected to the two second glue injection holes k2 in a one-to-one correspondence.

[0146] Since the second inner cavity N2 is provided with a plurality of Fig.13 As shown, a partition structure (not shown) is provided inside the partition 224. The partition structure inside the partition 224 can be understood by referring to the partition structure inside the frame 222 shown above, and will not be described in detail here. Fig.10 For example, the dotted line with an arrow indicates the position of the second injection hole k2. Fig.10 The diagram shows a situation where two second glue injection holes k2 are provided. Accordingly, each second glue injection hole k2 can be connected to a second inner cavity N2 , that is, two second inner cavities N2 can be provided in the partition 224 .

[0147] Since there are multiple second inner cavities N2 , that is, a partition structure is provided inside the partition 224 , it is beneficial to further improve the structural strength of the partition 224 , thereby improving the reliability of the battery box 200 .

[0148] According to some embodiments of this application, please continue to refer to Fig.12 , the aperture of the second glue injection hole k2 is 5 mm to 20 mm. That is, the aperture of the second glue injection hole k2 is the second aperture d2, and the second aperture d2 is 5 mm to 20 mm. Exemplarily, the second aperture d2 can be 5 mm, 6 mm, 8 mm, 10 mm, 13 mm, 15 mm, 18 mm, 19 mm or 20 mm. The size of the second aperture d2 can be determined according to the shape of the second glue injection hole k2, which can be understood by referring to the first aperture d1 illustrated above, and will not be repeated here.

[0149] By controlling the aperture of the second glue injection hole k2, not only the injection of the foam glue is facilitated, but also the foam glue can be contained in the second inner cavity N2.

[0150] According to some embodiments of this application, please continue to refer to Fig.12 The material of the second foam insulation structure 225 includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone. For example, the material of the second foam insulation structure 225 can be two-component foamed polyurethane.

[0151] It can be understood that the specific hardness of the second foam insulation structure 225 can be controlled according to the selected material and the specific process. Since the second foam insulation structure 225 is formed by a single-component foamed polyurethane, a two-component foamed polyurethane, a single-component foamed silicone or a two-component foamed silicone, the structural strength of the battery box 200 can be further improved. By flexibly selecting the material of the second foam insulation structure 225, the performance requirements of the second foam insulation structure 225 under different usage requirements can be met.

[0152] According to some embodiments of this application, please continue to refer to Figure 5 , there is one partition 224. The number and arrangement of the partitions 224 can be set according to the usage, and are not specifically limited here.

[0153] For example, combined with reference Fig.15 and Fig.16 , Fig.15 2 is a three-dimensional schematic diagram of a partial structure of a battery box 200 in some other embodiments of the present application. Fig.16 for Fig.15 The schematic diagram of the top view of the partial structure of the battery case 200 is shown, and three separators 224 are provided. Two of the separators 224 are arranged opposite to each other along the second direction F2, and the two ends of the two separators 224 are respectively connected to two side structures 222a arranged opposite to each other along the third direction F3. One end of another separator 224 is connected to a side structure 222a arranged along the second direction F2, and the other end is extended along the second direction F2 and sequentially connected to two separators 224 arranged opposite to each other along the second direction F2. At this time, the three separators 224 divide the accommodating cavity Q into three sub-chambers Q1. Two of the three separators 224 are provided with two second glue injection holes k2.

[0154] For example, in conjunction with reference Fig.17 and Fig.18 , Fig.17 is a three-dimensional schematic diagram of a partial structure of a battery box 200 in some other embodiments of the present application, Fig.18 for Fig.17 The schematic diagram of the top view of the partial structure of the battery box 200 shows that there are six separators 224. Fig.15 and Fig.16The illustrated situation is different in that four partitions 224 are provided, one end of which is connected to a side structure 222a arranged along the second direction F2 and the other end of which is extended along the second direction F2 and sequentially connected to two partitions 224 arranged opposite to each other along the second direction F2. These four partitions 224 are sequentially spaced along the third direction F3. At this time, the six partitions 224 divide the accommodating chamber Q into eleven sub-chambers Q1. Five of the six partitions 224 are provided with second glue injection holes k2, some of the partitions 224 are provided with three second glue injection holes k2, and some of the partitions 224 are provided with four second glue injection holes k2.

[0155] Therefore, in combination with the situations illustrated in the above embodiments, the number and arrangement of the partitions 224 can be flexibly set according to usage requirements.

[0156] According to some embodiments of this application, please continue to refer to Figure 5 , and combined with reference Fig.19 , Fig.19 2 is a schematic cross-sectional view of the plate body 221 in some embodiments of the present application, wherein the plate body 221 has a third inner cavity N3 which is independent of the accommodating cavity Q. The battery box 200 further includes a third foam insulation structure 226 disposed in the third inner cavity N3.

[0157] The third inner cavity N3 may be understood with reference to the first inner cavity N1 and the second inner cavity N2 illustrated above, and the third foam insulation structure 226 may be understood with reference to the first foam insulation structure 223 and the second foam insulation structure 225 illustrated above, which will not be described in detail here.

[0158] By providing the third foam insulation structure 226 in the plate body 221 , the internal space of the plate body 221 can be further utilized, and the insulation performance of the battery box 200 can be further improved.

[0159] Of course, in some other embodiments, the plate 221 may be a solid structure, which can further improve the structural strength of the plate 221. The relevant structure of the plate 221 can be set according to the components carried in the battery box 200 and whether the plate 221 is located at the top or the bottom, and is not specifically limited here.

[0160] According to some embodiments of this application, please continue to refer to Figure 5 and Fig.19 The third foam insulation structure 226 is formed in the third inner cavity N3 through a chemical foaming process.

[0161] In this way, the third foam insulation structure 226 is manufactured by the chemical foaming process, which can be more flexibly adapted to the structure of the plate body 221, facilitates production, and reduces production costs.

[0162] Of course, in some other embodiments, the third foam insulation structure 226 can also be made by a physical foaming process. In addition, the plate body 221 can also be provided with a third glue injection hole (not shown in the figure) connected to the third inner cavity N3. The relevant implementation of the third glue injection hole can refer to the first glue injection hole k1 and the second glue injection hole k2, which will not be repeated here.

[0163] It should be noted that when any one of the first glue injection hole k1, the second glue injection hole k2 and the third glue injection hole is opened, the opening positions can be distributed as evenly as possible in various parts of the battery box 200. This is conducive to improving the structural strength of the battery box 200 as a whole.

[0164] According to some embodiments of this application, please continue to refer to Figure 5 and Fig.19 The material of the third foam insulation structure 226 includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone. For example, the material of the third foam insulation structure 226 can be two-component foamed polyurethane.

[0165] It is understandable that the specific hardness of the third foam insulation structure 226 can be controlled according to the selected material and the specific process. Since the third foam insulation structure 226 is formed by a single-component foamed polyurethane, a two-component foamed polyurethane, a single-component foamed silicone or a two-component foamed silicone, the structural strength of the battery box 200 can be further improved. By flexibly selecting the material of the third foam insulation structure 226, the performance requirements of the third foam insulation structure 226 under different usage requirements can be met.

[0166] According to some embodiments of this application, please continue to refer to Figure 5 and Figure 6 , along the thickness direction of the plate body 221, the ratio of the size of the first foam insulation structure 223 to the size of the first inner cavity N1 is 0.9 to 1. The size of the first foam insulation structure 223 along the first direction F1 is the first size h1, and the size of the first inner cavity N1 along the first direction F1 is the second size h2. That is, the ratio of the first size h1 to the second size h2 is 0.9 to 1. Exemplarily, the ratio may be 0.9, 0.91, 0.93, 0.95, 0.96, 0.97, 0.98 or 1. For example, Figure 6 As an example, the situation where the ratio of the first size h1 to the second size h2 is 1 is illustrated, that is, the first foam thermal insulation structure 223 can be completely filled in the first inner cavity N1.

[0167] In this way, by controlling the size of the first foam insulation structure 223, the insulation performance can be further improved.

[0168] According to some embodiments of this application, please continue to refer to Figure 5 and Figure 6 The material of the first foam insulation structure 223 includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone. For example, the material of the first foam insulation structure 223 can be two-component foamed polyurethane.

[0169] It can be understood that the specific hardness of the first foam insulation structure 223 can be controlled according to the selected material and the specific process. Since the first foam insulation structure 223 is formed by a single-component foamed polyurethane, a two-component foamed polyurethane, a single-component foamed silicone or a two-component foamed silicone, the structural strength of the battery box 200 can be further improved. By flexibly selecting the material of the first foam insulation structure 223, the performance requirements of the first foam insulation structure 223 under different usage requirements can be met.

[0170] It should be noted that the materials of the first foam thermal insulation structure 223 , the second foam thermal insulation structure 225 and the third foam thermal insulation structure 226 may be the same or different.

[0171] According to some embodiments of this application, please continue to refer to Figure 5 and Fig.12 , along the thickness direction of the plate body 221, the ratio of the size of the second foam insulation structure 225 to the size of the second inner cavity N2 is 0.9 to 1. The size of the second foam insulation structure 225 along the first direction F1 is a third size h3, and the size of the second inner cavity N2 along the first direction F1 is a fourth size h4. That is, the ratio of the third size h3 to the fourth size h4 is 0.9 to 1. Exemplarily, the ratio may be 0.9, 0.91, 0.93, 0.95, 0.96, 0.97, 0.98 or 1. For example, Fig.12 As an example, it illustrates a situation where the ratio of the third size h3 to the fourth size h4 is 1, that is, the second foam thermal insulation structure 225 can be completely filled in the second inner cavity N2.

[0172] In this way, by controlling the size of the second foam thermal insulation structure 225, the thermal insulation performance can be further improved.

[0173] According to some embodiments of this application, please continue to refer to Figure 5 The battery box 200 further includes a connector 227, which is connected to the outer side of the frame 222. The connector 227 may be provided with a corresponding structure for easy assembly.

[0174] In this way, by providing the connecting piece 227 on the frame 222 , it is convenient to install the frame 222 .

[0175] According to some embodiments of this application, please continue to refer to Figure 5 , Fig.10 , Figures 15 to 18 , a corresponding connection structure (not shown) may be provided on the frame 222, and the frame 222 may be connected to other parts of the battery box 200 by means of the connection structure. Exemplarily, the connection structure may be a rivet nut. Of course, the connection method between the first part 210 and the second part 220 of the battery box 200 may also be other methods, which are not specifically limited here.

[0176] According to some embodiments of the present application, the present application further provides a battery 10, including the battery case 200 in any of the above embodiments. Of course, the battery also includes a battery cell 110 disposed in the accommodation cavity Q of the battery case 200. Since the battery includes the battery case 200 in any of the above solutions, the advantages of the battery case 200 mentioned above are also possessed by the battery, which will not be repeated here.

[0177] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 10 in any of the above embodiments. The battery 10 is used to provide electrical energy.

[0178] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0179] According to some embodiments of this application, please continue to refer to Figures 5 to 14, the embodiment of the present application provides a battery case 200, the battery case 200 includes a plate 221, a frame 222, a partition 224, a first foam insulation structure 223 and a second foam insulation structure 225. The frame 222 is arranged around the edge of the plate 221, and defines a receiving cavity Q with the plate 221. The frame 222 has a first inner cavity N1 that is independent of the receiving cavity Q. The first foam insulation structure 223 is arranged in the first inner cavity N1. The frame 222 has a first surface b1 that is arranged toward the receiving cavity Q, and a second surface b2 that is connected to the first surface b1. The second surface b2 is arranged at intervals with the plate 221 along the thickness direction of the plate 221. The frame 222 is provided with a first glue injection hole k1 that is connected to the first inner cavity N1 and is arranged on the first surface b1. Along the thickness direction of the plate 221, the spacing between the first glue injection hole k1 and the plate 221 is greater than the spacing between the first glue injection hole k1 and the second surface b2. The first glue injection hole k1 is used for injecting foam glue into the first inner cavity N1 to form the first foam insulation structure 223. The partition 224 is located in the accommodating cavity Q and is connected to the frame 222. The partition 224 divides the accommodating cavity Q into a plurality of sub-cavities Q1. The partition 224 has a second inner cavity N2 that is independent of the sub-cavity Q1. The second foam insulation structure 225 is arranged in the second inner cavity N2. The partition 224 has a first side surface c1 arranged toward the plurality of sub-cavities Q1, and a second glue injection hole k2 that is connected to the second inner cavity N2 is provided on the first side surface c1. The second glue injection hole k2 is used for injecting foam glue into the second inner cavity N2 to form the second foam insulation structure 225. The apertures of the first glue injection hole k1 and the second glue injection hole k2 are both 5 mm to 20 mm. The first inner cavity N1 is completely filled with the first foam insulation structure 223, and the second inner cavity N2 is completely filled with the second foam insulation structure 225. The first foam insulation structure 223 is formed in the first inner cavity N1 by chemical foaming process. The second foam insulation structure 225 is formed in the second inner cavity N2 by chemical foaming process.

[0180] Therefore, the embodiment of the present application sets the first foam insulation structure 223 in at least the first inner cavity N1 in the frame 222. Since the first foam insulation structure 223 has certain insulation performance, the insulation performance of the battery case 200 is improved. In the event that a structural defect such as a crack appears in a certain part of the frame 222, the first foam insulation structure 223 can also play a role in blocking water vapor. As a result, the reliability of the battery case 200 is improved. In addition, since the first foam insulation structure 223 is located in the first inner cavity N1 of the frame 222, it will not occupy the internal space and external space of the battery case 200, thereby improving the space utilization rate of the battery case 200. In this process, by setting the first glue injection hole k1 and the chemical foaming process that cooperate with each other, it can be more flexibly adapted to the structure of the frame 222, which is convenient for production and reduces production costs. Furthermore, the first glue injection hole k1 is arranged on the inner side of the frame 222 and close to the second surface b2 of the frame 222, which is not only convenient for injecting foam glue through the first glue injection hole k1, but also can improve the appearance and sealing performance of the battery box 200, and further reduce the risk of water vapor infiltration. Further, in the case of using a partition plate, a second foam insulation structure 225 is arranged in the second inner cavity N2 in the partition plate, which can further improve the insulation performance of the battery box 200. Further, by selecting corresponding materials to form a corresponding foam insulation structure with a certain hardness, the structural strength of the battery box 200 can be further improved, and then the reliability of the battery box 200 can be further improved. Therefore, the method of setting the foam insulation structure in the embodiment of the present application can adapt to frames 222 of different structures, is easy to operate, and is easy to produce. Through the mutual cooperation of the relevant foam insulation structure and the relevant glue injection hole, the reliability of the battery box 200 is improved as a whole, and then the reliability of the battery is improved.

[0181] 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 battery box (200), characterized in that: include: Plate(221); a frame (222) arranged around the edge of the plate body (221) and defining a receiving cavity (Q) together with the plate body (221); a first inner cavity (N1) independent of the receiving cavity (Q) is provided in the frame (222); and The first foam thermal insulation structure (223) is arranged in the first inner cavity (N1).

2. The battery box (200) according to claim 1, characterized in that: The first foam thermal insulation structure (223) is formed in the first inner cavity (N1) by a chemical foaming process.

3. The battery box (200) according to claim 2, characterized in that: The frame (222) is provided with a first glue injection hole (k1) connected to the first inner cavity (N1); the first glue injection hole (k1) is used for injecting foam glue into the first inner cavity (N1) to form the first foam thermal insulation structure (223).

4. The battery box (200) according to claim 3, characterized in that: The frame (222) has a first surface (b1) disposed toward the accommodating cavity (Q); The first glue injection hole (k1) is arranged on the first surface (b1).

5. The battery box (200) according to claim 4, characterized in that: The frame (222) further comprises a second surface (b2) connected to the first surface (b1), and the second surface (b2) and the plate body (221) are arranged at intervals along the thickness direction of the plate body (221); Along the thickness direction of the plate body (221), the distance between the first glue injection hole (k1) and the plate body (221) is greater than the distance between the first glue injection hole (k1) and the second surface (b2).

6. The battery box (200) according to claim 3, characterized in that: There are a plurality of first inner cavities (N1), and all the first inner cavities (N1) are independent of each other; there are a plurality of first glue injection holes (k1); Each of the first inner cavities (N1) is in communication with at least one of the first glue injection holes (k1).

7. The battery box (200) according to claim 3, characterized in that: The frame (222) comprises a plurality of edge structures (222a) which are connected end to end in sequence and are arranged around the edge of the plate body (221); At least one of the edge structures (222a) is provided with the first inner cavity (N1) and the first glue injection hole (k1) connected to the first inner cavity (N1).

8. The battery box (200) according to claim 3, characterized in that: The diameter of the first glue injection hole (k1) is 5 mm to 20 mm.

9. The battery box (200) according to any one of claims 1 to 8, characterized in that: The battery box (200) further comprises: a partition (224), at least partly located in the accommodating cavity (Q) and connected to the frame (222), the partition (224) dividing the accommodating cavity (Q) into a plurality of sub-cavities (Q1); the partition (224) having a second inner cavity (N2) independent of the sub-cavities (Q1); and The second foam thermal insulation structure (225) is arranged in the second inner cavity (N2).

10. The battery box (200) according to claim 9, characterized in that: The second foam thermal insulation structure (225) is formed in the second inner cavity (N2) by a chemical foaming process.

11. The battery box (200) according to claim 10, characterized in that: The partition (224) is provided with a second glue injection hole (k2) connected to the second inner cavity (N2), and the second glue injection hole (k2) is used for injecting foam glue into the second inner cavity (N2) to form the second foam thermal insulation structure (225).

12. The battery box (200) according to claim 11, characterized in that: The partition (224) has a first side surface (c1) disposed toward the plurality of sub-chambers (Q1); The second glue injection hole (k2) is arranged on the first side surface (c1).

13. The battery box (200) according to claim 12, characterized in that: The separator (224) further comprises a third surface (b3) connected to the first side surface (c1), and the third surface (b3) is spaced apart from the plate body (221) along the thickness direction of the plate body (221); Along the thickness direction of the plate body (221), the distance between the second glue injection hole (k2) and the plate body (221) is greater than the distance between the second glue injection hole (k2) and the third surface (b3).

14. The battery box (200) according to claim 11, characterized in that: The partition (224) is provided with a plurality of second inner cavities (N2), and all the second inner cavities (N2) are independent of each other; a plurality of second glue injection holes (k2) are provided; each second inner cavity (N2) is connected to at least one second glue injection hole (k2); and / or The diameter of the second glue injection hole (k2) is 5 mm to 20 mm.

15. The battery box (200) according to claim 9, characterized in that: The material of the second foam thermal insulation structure (225) includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone.

16. The battery box (200) according to any one of claims 1 to 8, characterized in that: The plate body (221) has a third inner cavity (N3) which is independent of the accommodating cavity (Q); The battery box (200) also includes a third foam insulation structure (226) disposed in the third inner cavity (N3).

17. The battery box (200) according to claim 16, characterized in that: The third foam insulation structure (226) is formed in the third inner cavity (N3) by a chemical foaming process; and / or The material of the third foam thermal insulation structure (226) includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone.

18. The battery box (200) according to any one of claims 1 to 8, characterized in that: Along the thickness direction of the plate body (221), the ratio of the size of the first foam insulation structure (223) to the size of the first inner cavity (N1) is 0.9 to 1; and / or The material of the first foam insulation structure (223) includes one of single-component foamed polyurethane, two-component foamed polyurethane, single-component foamed silicone, and two-component foamed silicone.

19. A battery (10), characterized in that: It comprises a battery box (200) as claimed in any one of claims 1 to 18.

20. An electrical device, characterized in that: Comprising a battery (10) as claimed in claim 19.

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