Upper box body and energy storage device

Abstract

The utility model discloses an upper box body and an energy storage device, the upper box body comprises a body, a first protective layer and a second protective layer, and the body is provided with an accommodating space which is opened downwards; the first protective layer is arranged on one side, facing the accommodating space, of the body; the second protective layer is arranged on one side, deviating from the accommodating space, of the body; wherein the first protective layer is a fireproof insulating layer, and the second protective layer is a sealing layer. The upper box body can optimize the effects of thermal runaway prevention, insulation, heat preservation, sealing and the like of parts in the accommodating space, and can improve the working performance and the safety performance of the energy storage device.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage devices, in particular to an upper box body and an energy storage device. Background Art

[0002] With the rapid development of the new energy vehicle industry, people's requirements for the safety and driving range of new energy vehicles are constantly increasing. The battery pack is one of the core components of new energy vehicles, and it is crucial to the safety, driving range, cost and service life of the whole vehicle. The battery pack is usually composed of multiple battery modules arranged in a box, wherein the box generally includes an upper box and a lower box. The battery module is generally placed in the lower box first, and the upper box is sealed at the upper end of the lower box to achieve the capping of the battery module.

[0003] In the related art, there is a problem of insufficient insulation protection between the upper box of the battery pack and the battery module, which can easily cause a short circuit in the battery module, reducing the safety of the battery pack. In addition, when a single battery module experiences thermal runaway, the upper box has poor effect in preventing heat spread and cannot block thermal runaway in time, which can easily lead to thermal runaway or even explosion of the entire battery pack, seriously endangering people's lives and property safety. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide an upper box body, which can optimize the effects of thermal runaway prevention, insulation, heat preservation and sealing of the components in the accommodating space, and can improve the working performance and safety performance of the energy storage device.

[0005] The utility model also provides an energy storage device having the upper box body.

[0006] According to the upper box body of the first aspect embodiment of the utility model, the upper box body includes: a main body, a first protective layer and a second protective layer, the main body has a downwardly open accommodating space; the first protective layer is arranged on the side of the main body facing the accommodating space; the second protective layer is arranged on the side of the main body away from the accommodating space; wherein the first protective layer is constructed as a fireproof insulating layer, and the second protective layer is constructed as a sealing layer.

[0007] According to the upper box body of the utility model, multi-level protection can be formed by the first protective layer, the second protective layer and the main body, and the upper box body can be optimized for the thermal runaway prevention, insulation, heat preservation and sealing performance of the components in the accommodating space, thereby effectively improving the working performance and safety performance of the energy storage device and protecting people's lives and property safety.

[0008] According to some embodiments of the present invention, the first protective layer is constructed as a composite material layer, and the first protective layer may include a fireproof layer, an insulating layer and a thermal insulation layer.

[0009] Furthermore, the insulating layer and the fireproof layer are located on a side of the thermal insulation layer facing the accommodating space.

[0010] In some embodiments, the body includes: a body plate and a side plate located around the body plate, and the first protective layer and the second protective layer are disposed on the body plate and the side plate.

[0011] Furthermore, the side panel and / or the main body panel is provided with a first air hole, the first protective layer has a second air hole connected to the first air hole, and the second protective layer has a third air hole connected to the first air hole.

[0012] Furthermore, the upper box body further comprises: a breathable membrane, wherein the breathable membrane is arranged at the first breathable hole, and / or the second breathable hole, and / or the third breathable hole.

[0013] In some embodiments, weight-reducing holes are provided on the main plate and / or the side plate.

[0014] According to some embodiments of the present invention, the first protective layer includes: a first sub-protective layer corresponding to the main plate and a second sub-protective layer corresponding to the side plate, the first sub-protective layer is closely laid on the main plate, and the second sub-protective layer is closely laid on the side plate.

[0015] According to some embodiments of the utility model, the second protective layer includes: a third sub-protective layer corresponding to the main plate and a fourth sub-protective layer corresponding to the side plate, the third sub-protective layer is closely laid on the main plate, and the extension height of the fourth sub-protective layer is less than the height of the side plate.

[0016] According to the energy storage device of the second aspect of the embodiment of the utility model, the energy storage device includes: the upper box body described in any one of the above embodiments.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is an overall schematic diagram of the upper box body according to some embodiments of the utility model;

[0020] Figure 2 It is a schematic diagram of the upper box part according to some embodiments of the utility model;

[0021] Figure 3 It is an exploded view of the upper box body according to some embodiments of the utility model.

[0022] Reference numerals:

[0023] Upper box 1;

[0024] The body 11, the body plate 111, the side plate 112, the flange portion 1121, the first air hole 11a, and the weight-reducing hole 11b;

[0025] A first protective layer 12, a second air permeable hole 12a;

[0026] A second protective layer 13, a third vent hole 13a;

[0027] Breathable membrane 14. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application 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 drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0030] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 present invention.

[0035] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0036] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0037] The term "plurality" used in the present application refers to two or more (including two).

[0038] Reference below Figure 1-Figure 3The upper box body 1 and the energy storage device according to the embodiment of the utility model are described.

[0039] like Figure 1 and Figure 3 As shown, according to the upper box body 1 of the embodiment of the first aspect of the utility model, the upper box body 1 includes: a main body 11, a first protective layer 12 and a second protective layer 13.

[0040] Among them, the main body 11 has a accommodating space open downward; the first protective layer 12 is arranged on the side of the main body 11 facing the accommodating space; the second protective layer 13 is arranged on the side of the main body 11 away from the accommodating space; the first protective layer 12 is constructed as a fireproof insulation layer, and the second protective layer 13 is constructed as a sealing layer.

[0041] Specifically, the main body 11 has a downwardly open accommodating space, which can be used to accommodate components (such as: battery modules, battery management systems, etc.). Exemplarily, the accommodating space can accommodate at least part of the battery module, and the main body 11 covers the upper end of the battery module to fix and protect the battery module; the first protective layer 12 can be constructed as a fireproof insulating and heat-insulating layer, which has fireproof, insulating and heat-insulating properties. The first protective layer 12 is arranged on the side of the main body 11 facing the accommodating space (that is, the inner side of the main body 11), which can effectively improve the thermal runaway prevention, insulation and heat preservation performance of the upper box 1 for the components in the accommodating space; the second protective layer 13 is constructed as a sealing layer and is arranged on the side of the main body 11 away from the accommodating space (that is, the outer side of the main body 11), which can further protect the main body 11, the first protective layer 12 and the components in the accommodating space, and improve the sealing performance.

[0042] According to the upper box body 1 of the utility model, multi-level protection can be formed by the first protective layer 12, the second protective layer 13 and the main body 11, and the upper box body 1 can optimize the thermal runaway prevention, insulation, heat preservation and sealing performance of the components in the accommodating space, thereby effectively improving the working performance and safety performance of the energy storage device and protecting people's lives and property safety.

[0043] In addition, in some specific embodiments of the present invention, the main body 11 and the first protective layer 12 and the second protective layer 13 are fixedly connected by bonding, which is beneficial to improving the connection stability between the main body 11 and the first protective layer 12 and the second protective layer 13 and saving economic costs.

[0044] like Figure 1 As shown, according to some embodiments of the present invention, the first protective layer 12 is constructed as a composite material layer, and the first protective layer 12 may include a fireproof layer, an insulating layer, and a heat-insulating layer.

[0045] Specifically, the first protective layer 12 can be composed of a combination of multiple layers of materials with different functional characteristics (for example: waterproof characteristics, fireproof characteristics, insulation characteristics, sealing characteristics, etc.), and the first protective layer 12 can include, but is not limited to, a fireproof layer, an insulating layer, and a thermal insulation layer. Among them, the thermal insulation layer can play a good role in heat insulation, heat preservation, and heat diffusion prevention for the battery module in the accommodation space, which is beneficial to improving the working performance and safety of the battery module; the insulating layer can provide insulation protection for the battery module in the accommodation space to ensure the working safety of the battery module; the fireproof layer can play a role in preventing thermal runaway and fire. When a battery module in the accommodation space fails, the fireproof layer can reduce the speed of heat diffusion between the battery modules and prevent the thermal runaway of the battery module from spreading to the outside, which can effectively improve the overall safety of the battery module and the energy storage device.

[0046] In addition, in a specific embodiment of the present invention, the material of the insulating layer is mica. Since mica has good insulating properties and thermal stability, by constructing the material of the insulating layer as mica, it is beneficial to further enhance the insulation protection strength of the insulating layer to the components in the accommodating space.

[0047] like Figure 1 As shown, according to some embodiments of the present invention, the insulating layer and the fireproof layer are located on the side of the thermal insulation layer facing the accommodating space.

[0048] Specifically, the thermal insulation layer can be arranged on the side of the body 11 facing the accommodating space, the insulating layer can be arranged on the side of the thermal insulation layer facing the accommodating space, and the fireproof layer can be arranged on the side of the insulating layer facing the accommodating space, that is, the fireproof layer is located at the innermost layer, so that the fireproof layer can quickly and directly block the thermal runaway of the battery module in the accommodating space, and prevent the thermal runaway from propagating to the energy storage device as a whole and the outside world, thereby ensuring the safe evacuation of surrounding dangerous sources and personnel, and can minimize the losses caused by heat diffusion, thereby improving the safety of the use of the energy storage device. The thermal insulation layer is located on the outside of the insulating layer and the fireproof layer, which can effectively insulate the accommodating space from the outside world, and can play a role in secondary thermal runaway protection, further improving the safety performance of the energy storage device.

[0049] Furthermore, in some specific embodiments of the present invention, the material structure of the fireproof layer is an intumescent fireproof coating, and is coated on the inner surface of the insulating layer to ensure that the fireproof layer has good heat insulation and fireproofing properties.

[0050] like Figure 3 As shown, according to some embodiments of the present invention, the body 11 includes: a body plate 111 and a side plate 112 located around the body plate 111 , and the first protective layer 12 and the second protective layer 13 are disposed on the body plate 111 and the side plate 112 .

[0051] Specifically, one end of the side panel 112 is connected to the main body panel 111, and the other end extends in the thickness direction of the main body panel 111 in a direction away from the main body panel 111. The main body panel 111 and the side panel 112 together define a downwardly open accommodation space. The main body panel 111 is provided with a first protective layer 12 on one side in the thickness direction, and a second protective layer 13 on the other side. Similarly, the side panel 112 is provided with a first protective layer 12 on one side in the thickness direction, and a second protective layer 13 on the other side. By providing the main body panel 111 and the side panel 112, the first protective layer 12 and the second protective layer 13 can protect the upper end and the surrounding side of the components in the accommodation space, which can improve the comprehensiveness of the protection of the components by the first protective layer 12 and the second protective layer 13, and enhance the protective effect of the upper box body 1.

[0052] In addition, in some specific embodiments of the present invention, a flange portion 1121 is formed at the other end of the side panel 112 and extends away from the accommodating space along the thickness direction of the side panel 112. The flange portion 1121 can make the assembly and disassembly of the upper box body 1 easier and more convenient, which is beneficial to improving the assembly efficiency and maintenance convenience of the upper box body 1.

[0053] like Figure 3 As shown, according to some embodiments of the present invention, a first air hole 11a is provided on the side panel 112 and / or the main panel 111, the first protective layer 12 has a second air hole 12a connected to the first air hole 11a, and the second protective layer 13 has a third air hole 13a connected to the first air hole 11a.

[0054] Specifically, in the embodiment of the utility model, the arrangement of the first air holes 11a can be that the first air holes 11a are formed only on the side plate 112, while the first air holes 11a are not provided on the main plate 111; the arrangement of the first air holes 11a can also be that the first air holes 11a are formed only on the main plate 111, while the first air holes 11a are not provided on the side plate 112; the arrangement of the first air holes 11a can also be that the first air holes 11a are formed on both the side plate 112 and the main plate 111. The first air hole 11a can be a through hole that passes through the side plate 112 or the main plate 111 in the thickness direction, and the second air hole 12a on the first protective layer 12 and the third air hole 13a on the second protective layer 13 are both connected to the first air hole 11a, so that the accommodating space and the outside world can exchange gas through the second air hole 12a, the first air hole 11a and the third air hole 13a. In this way, it can avoid excessive internal and external air pressure due to the temperature difference between the accommodating space and the outside world, effectively improve the heat dissipation and pressure relief performance of the upper box body 1, and can play a good role in preventing thermal runaway of the battery module and improving safety.

[0055] like Figure 1 and Figure 3As shown, according to some embodiments of the present invention, the upper box body 1 further includes: a breathable membrane 14, and the breathable membrane 14 is arranged at the first breathable hole 11a, and / or the second breathable hole 12a, and / or the third breathable hole 13a.

[0056] Specifically, the breathable membrane 14 is suitable for covering the first breathable hole 11a, the second breathable hole 12a and / or the third breathable hole 13a to play a blocking role in the air flow channel between the accommodating space formed by the first breathable hole 11a, the second breathable hole 12a and the third breathable hole 13a and the outside world. In this way, while ensuring that the air flow channel has the function of heat dissipation and pressure relief, it can avoid the air flow channel from being directly exposed, thereby ensuring that the upper box body 1 has good sealing performance, improving the protection effect of the upper box body 1, and extending the working life of the components in the accommodating space.

[0057] In addition, in some specific embodiments of the present invention, the first air hole 11a, the second air hole 12a and the third air hole 13a are constructed in multiple forms, and the air permeable membrane 14 is constructed in multiple forms corresponding to the first air hole 11a, the second air hole 12a and the third air hole 13a one by one. In this way, the air flow channel between the accommodating space and the outside world can be increased, which is beneficial to improving the heat dissipation and pressure relief effect of the upper box body 1.

[0058] like Figure 3 As shown, according to some embodiments of the present invention, weight-reducing holes 11 b are provided on the main body plate 111 and / or the side plate 112 .

[0059] Specifically, the weight-reducing holes 11b can be constructed as a plurality of holes that are spaced apart on the main plate 111 and / or the side plate 112. By setting the weight-reducing holes 11b, the weight of the main plate 111 and the side plate 112 can be reduced and materials can be saved while ensuring the structural strength and rigidity of the main plate 111 and the side plate 112. This can improve the lightweight of the upper box body 1 and save economic costs, which is beneficial to optimizing the energy efficiency and economic benefits of the energy storage device and helps to increase the cruising range of the entire vehicle.

[0060] In addition, in some specific embodiments of the present invention, the main body plate 111 and the side plate 112 both adopt a composite structure of a metal frame and non-metal (such as plastic) to further achieve lightweighting of the upper box body 1.

[0061] like Figure 3 As shown, according to some embodiments of the present invention, the first protective layer 12 includes: a first sub-protective layer corresponding to the main plate 111 and a second sub-protective layer corresponding to the side plate 112, the first sub-protective layer is closely laid on the main plate 111, and the second sub-protective layer is closely laid on the side plate 112.

[0062] Specifically, the first sub-protective layer can be closely laid on the side of the main plate 111 facing the accommodating space, and the second sub-protective layer can be closely laid on the side of the side plate 112 facing the accommodating space, so that the first sub-protective layer can play a good role in fire prevention, insulation and heat preservation on the upper side of the accommodating space, and the second sub-protective layer can play a good role in fire prevention, insulation and heat preservation on the surrounding side of the accommodating space. Therefore, by arranging the first sub-protective layer and the second sub-protective layer, the comprehensiveness of the protection of the upper and surrounding sides of the accommodating space can be improved, the protection effect of the upper box body 1 can be effectively enhanced, and the overall safety of the energy storage device can be improved.

[0063] It can be understood that the first sub-protective layer in the embodiment of the utility model can also play a role in regulating the upper space of the accommodating space, thereby improving the sealing between the upper end of the battery module in the accommodating space and the upper box body 1, thereby preventing heat from diffusing from the upper end to other battery modules when a single battery module thermally runs away, and further enhancing the anti-thermal runaway effect of the upper box body 1.

[0064] like Figure 1-Figure 3 As shown, according to some embodiments of the utility model, the second protective layer 13 includes: a third sub-protective layer corresponding to the main plate 111 and a fourth sub-protective layer corresponding to the side plate 112, the third sub-protective layer is closely laid on the main plate 111, and the extension height of the fourth sub-protective layer is less than the height of the side plate 112.

[0065] Specifically, the third sub-protective layer can be closely laid on the side of the main body plate 111 away from the accommodating space, and the fourth sub-protective layer can be closely laid on the side of the side plate 112 away from the accommodating space, so that the third sub-protective layer and the fourth sub-protective layer can jointly play a comprehensive sealing role on the accommodating space, which can effectively improve the sealing of the upper box body 1 to the components in the accommodating space and ensure the normal operation of the components. In addition, the extension height of the fourth sub-protective layer is less than the height of the side plate 112, so that a certain space can be reserved for the part of the outer side of the side plate 112 near the free end, so as to facilitate the installation and fixation of the side plate 112 and other components in the energy storage device (such as the lower box body), which helps to improve the assembly efficiency and stability of the upper box body 1 and other components in the energy storage device.

[0066] like Figure 1-Figure 3 As shown, according to the energy storage device of the second aspect of the utility model, the energy storage device includes: the upper box body 1 described in any one of the above embodiments, and the technical effect produced is consistent with the above embodiments, which will not be repeated here.

[0067] It should be pointed out that the above-mentioned energy storage device can be an electricity storage device and an electricity-consuming device, etc. For example, the energy storage device can be a battery pack, which is provided with a battery module to realize electric energy storage and transmission, and the upper box body 1 can be covered on the upper end of the battery module to protect the battery pack.

[0068] The energy storage device in the present invention can be used in, but is not limited to, electrical devices and electrical storage devices such as vehicles, ships or aircraft. A power supply system comprising the main body 11, the first protective layer 12 and the second protective layer 13 disclosed in the present invention can be used to form the electrical device or electrical storage device, which is beneficial to increase the application range of the upper box 1 and improve the safety and working performance of the energy storage device.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An upper box, characterized in that: include: A body (11), wherein the body (11) has a accommodating space that is open downward; A first protective layer (12), the first protective layer (12) being arranged on a side of the body (11) facing the accommodating space; A second protective layer (13), the second protective layer (13) is arranged on a side of the body (11) away from the accommodating space; wherein The first protective layer (12) is configured as a fireproof insulation layer, and the second protective layer (13) is configured as a sealing layer.

2. The upper box according to claim 1, characterized in that: The first protective layer (12) is constructed as a composite material layer, and the first protective layer (12) may include a fireproof layer, an insulating layer and a heat-insulating layer.

3. The upper box according to claim 2, characterized in that: The insulating layer and the fireproof layer are located on a side of the thermal insulation layer facing the accommodating space.

4. The upper box according to claim 1, characterized in that: The body (11) comprises: a body plate (111) and a side plate (112) located around the body plate (111), and the first protective layer (12) and the second protective layer (13) are both provided on the body plate (111) and the side plate (112).

5. The upper box according to claim 4, characterized in that: The side plate (112) and / or the main plate (111) are provided with a first air hole (11a), the first protective layer (12) has a second air hole (12a) connected to the first air hole (11a), and the second protective layer (13) has a third air hole (13a) connected to the first air hole (11a).

6. The upper box according to claim 5, characterized in that: Also includes: A breathable membrane (14), wherein the breathable membrane (14) is arranged at the first breathable hole (11a), and / or the second breathable hole (12a), and / or the third breathable hole (13a).

7. The upper box according to claim 4, characterized in that: The main body plate (111) and / or the side plate (112) are provided with weight-reducing holes (11b).

8. The upper box according to claim 4, characterized in that: The first protective layer (12) comprises: a first sub-protective layer corresponding to the main plate (111) and a second sub-protective layer corresponding to the side plate (112), the first sub-protective layer being closely laid on the main plate (111), and the second sub-protective layer being closely laid on the side plate (112).

9. The upper box according to claim 4, characterized in that: The second protective layer (13) comprises: a third sub-protective layer corresponding to the main plate (111) and a fourth sub-protective layer corresponding to the side plate (112), the third sub-protective layer is closely laid on the main plate (111), and the extension height of the fourth sub-protective layer is less than the height of the side plate (112).

10. An energy storage device, characterized in that: include: The upper box according to any one of claims 1 to 9.

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