Battery pack upper cover and vehicle

Abstract

The utility model discloses a battery pack upper cover and a vehicle, the battery pack upper cover comprises: a structural plate assembly and a protective plate assembly, the structural plate assembly is connected to a vehicle body, the structural plate assembly has a first surface and a second surface opposite to each other, and at least part of the first surface forms a vehicle body bearing surface; the protection plate assembly is arranged on the second surface and is at least suitable for thermal protection. According to the battery pack upper cover, the bearing capacity, the deformation resistance, the thermal protection performance and the like can be improved, the safety of a passenger compartment after thermal runaway of the battery pack can be improved, and the working safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a battery pack upper cover and a vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, people have higher and higher requirements for the shape and range of electric vehicles, and then higher requirements for the energy density and lightweight of power batteries. In order to meet the above requirements, the direct integration of power batteries and body (Cell to Body, CTB) has emerged. The CTB integration method of direct integration of power batteries and body uses the body floor directly as the upper cover of the power battery pack, which can effectively improve the integration of the battery pack and achieve improved energy density and lightweight.

[0003] In the related technology, the CTB integration method of directly integrating the power battery and the vehicle body is adopted, which shortens the distance between the battery cell and the passenger compartment. As a result, the battery cell is prone to directly impact the vehicle body floor after thermal runaway occurs, causing a fire in the passenger compartment, thereby causing a serious accident. In addition, since the vehicle body floor needs to bear the load of the passenger compartment, the vehicle body floor is prone to deformation and touch the internal components of the battery pack, especially the battery cell, which may cause failure and pose a serious safety hazard. 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 a battery pack cover. The battery pack cover can improve the load-bearing capacity, deformation resistance and thermal protection performance, etc., can improve the safety of the passenger compartment after the battery pack thermal runaway, and improve the working safety of the battery pack.

[0005] The utility model also provides a vehicle having the battery pack upper cover.

[0006] According to the battery pack cover of the first aspect embodiment of the utility model, the battery pack cover includes: a structural plate assembly and a protective plate assembly, the structural plate assembly is connected to the vehicle body, and the structural plate assembly has a first surface and a second surface relative to each other, at least a portion of the first surface is formed as a vehicle body load-bearing surface; the protective plate assembly is arranged on the second surface and is at least suitable for heat protection.

[0007] According to the battery pack cover of the utility model, on the basis of realizing CTB integration, the structural plate assembly and the protective plate assembly can effectively improve the load-bearing capacity, deformation resistance and thermal protection performance of the battery pack cover. Compared with the CTB integration method adopted in the related art, the battery cell is easy to directly impact the vehicle body floor after thermal runaway, causing a fire in the passenger compartment, and the vehicle body floor is easy to deform and touch the internal components of the battery pack, causing a malfunction. In the utility model, the protective plate assembly on the second surface can solve the safety problem of the passenger compartment after the thermal runaway of the battery pack, and effectively improve the personal and property safety of the passengers in the vehicle. At the same time, a cavity is formed between the first surface and the second surface, which can enhance the rigidity and strength of the battery pack cover, without the need to set an additional reinforcing plate on the battery pack cover to solve the problem of easy deformation, thereby improving the safety performance of the whole vehicle and achieving lightweight of the whole vehicle.

[0008] According to some embodiments of the present invention, the structural plate assembly includes: a plurality of structural plates stacked in the relative directions between the first surface and the second surface, defined in sequence as the first structural plate to the Nth structural plate, N≥2, the first structural plate defines the first surface, and the Nth structural plate defines the second surface.

[0009] Furthermore, there are first gaps between adjacent structural plates, and at least one of the first gaps is filled with a reinforcement layer.

[0010] Furthermore, the reinforcement layer is constructed as one or more of a foaming layer and a porous plate.

[0011] Furthermore, at least one of the reinforcement layers is configured as a foamed layer.

[0012] In some embodiments, the structural panels include: a main panel body, a side panel body and a connecting panel body, one end of the side panel body is connected to the main panel body, and the other end of the side panel body is connected to the connecting panel body, and the connecting panel bodies of multiple structural panels are connected to the protective panel assembly.

[0013] Furthermore, the main board body is substantially parallel to the connecting board body.

[0014] According to some embodiments of the present invention, the protective plate assembly includes: a mica board, and the mica board is connected to the structural plate assembly.

[0015] Furthermore, there is a second gap between the mica board and the second surface, and the protective plate assembly further includes: a heat insulation layer, and the heat insulation layer is filled in the second gap.

[0016] According to the vehicle of the second aspect of the present utility model, the vehicle includes: the battery pack cover as 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 is a schematic cross-sectional view of a battery pack cover according to some embodiments of the present utility model;

[0020] Figure 2 It is an exploded view of the upper cover of the battery pack according to some embodiments of the present utility model.

[0021] Reference numerals:

[0022] Battery pack cover 1;

[0023] A first surface 11a, a first surface 11b, and a first gap 11c;

[0024] Structural plate 111;

[0025] Main plate body 1111, side plate body 1112, connecting plate body 1113;

[0026] Protection plate assembly 12, mica board 121, thermal insulation layer 122;

[0027] Reinforcement layer 13. 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 2 A battery pack upper cover 1 and a vehicle according to an embodiment of the utility model are described.

[0039] like Figure 2 As shown, according to the battery pack upper cover 1 of the first embodiment of the utility model, the battery pack upper cover 1 includes: a structural plate assembly and a protective plate assembly 12.

[0040] The structural plate assembly is connected to the vehicle body and has a first surface 11a and a second surface 11b opposite to each other, at least part of the first surface 11a being formed as a vehicle body bearing surface; the protective plate assembly 12 is arranged on the second surface 11b and is at least suitable for heat protection.

[0041] Specifically, the structural plate assembly has a first surface 11a and a second surface 11b, and the first surface 11a and the second surface 11b are opposite to each other, so that at least part of the first surface 11a and the second surface 11b are separated by a certain distance, so that the battery pack cover 1 can be formed into a cavity structure, which can improve the rigidity, strength and deformation resistance of the battery pack cover 1; and at least part of the first surface 11a is formed as the vehicle body load-bearing surface, and the second surface 11b is provided with a protective plate assembly 12, which has at least a thermal protection function and can at least enhance the thermal protection capability of the battery pack cover 1. The battery pack of the vehicle can be arranged on the side of the second surface 11b away from the first surface 11a, and the protective plate assembly 12 can block the heat of the battery pack from being transferred to the first surface 11a to avoid direct impact on the first surface 11a after thermal runaway of the battery pack.

[0042] It should be pointed out that the above-mentioned vehicle body load-bearing surface can be a vehicle interior space load-bearing surface for installing seats and supporting the feet of drivers and passengers, such as the vehicle floor surface, or it can be a luggage compartment space load-bearing surface in the luggage compartment, such as the luggage compartment bottom surface.

[0043] According to the battery pack cover 1 of the utility model, on the basis of realizing CTB integration, the load-bearing capacity, deformation resistance and thermal protection performance of the battery pack cover 1 can be effectively improved through the structural plate assembly and the protective plate assembly 12. Compared with the CTB integration method adopted in the related art, the battery cell is easy to directly impact the vehicle body floor after thermal runaway, causing a fire in the passenger compartment, and the vehicle body floor is easy to deform and touch the internal components of the battery pack, causing a malfunction. In the utility model, the protective plate assembly 12 on the second surface 11b can solve the safety problem of the passenger compartment after the thermal runaway of the battery pack, and effectively improve the personal and property safety of the passengers in the vehicle. At the same time, a cavity is formed between the first surface 11a and the second surface 11b, which can enhance the rigidity and strength of the battery pack cover 1, without the need to set an additional reinforcing plate on the battery pack cover 1 to solve the problem of easy deformation, thereby improving the safety performance of the whole vehicle and achieving lightweight of the whole vehicle.

[0044] like Figure 1 As shown, according to some embodiments of the present invention, the structural plate assembly includes: a plurality of structural plates 111 stacked in relative directions between a first surface 11a and a second surface 11b, which are defined as a first structural plate to an N-th structural plate in sequence, N≥2, the first structural plate defines the first surface 11a, and the N-th structural plate defines the second surface 11b.

[0045] Specifically, a plurality of structural plates 111 may be stacked in a direction relative to the first surface 11a and the second surface 11b, each structural plate 111 has a certain thickness in a direction relative to the first surface 11a and the second surface 11b, and a first surface 11a is formed on the first structural plate of the plurality of structural plates 111, and a second surface 11b is formed on the Nth structural plate, so that the first surface 11a and the second surface 11b are located at both ends of the structural plate assembly. Wherein, N≥2, and N may be 2, 3 or 5, corresponding to the structural plate assembly structure of two structural plates 111, three structural plates 111 or five structural plates 111 stacked in a direction relative to the first surface 11a and the second surface 11b.

[0046] By setting up a structural plate assembly including multiple structural plates 111, on the one hand, the multiple structural plates 111 can increase the distance between the first surface 11a and the second surface 11b, which is beneficial to increase the distance between the vehicle body load-bearing surface (vehicle floor surface, luggage compartment bottom, etc.) and the battery pack, and enhance the thermal protection effect; on the other hand, the multiple structural plates 111 can be jointly formed into a multi-layer structure, which can fully improve the strength, rigidity and deformation resistance of the battery pack cover 1, which is beneficial to further ensure the normal operation of the battery pack and optimize the NVH (Noise, Vibration, Harshness) performance of the whole vehicle, which helps to ensure driving safety and enhance driving comfort.

[0047] In addition, in some specific embodiments of the present invention, multiple structural plates 111 are all constructed of sheet metal materials. Since sheet metal materials have the advantages of light weight, good durability, good load-bearing capacity and low cost, therefore, by constructing multiple structural plates 111 as sheet metal materials, it is beneficial to further improve the lightweight and service life of the battery pack cover 1 and save economic costs.

[0048] like Figure 1 As shown, according to some embodiments of the present invention, there are first gaps 11 c between adjacent structural plates 111 , and at least one first gap 11 c is filled with a reinforcement layer 13 .

[0049] Specifically, at least part of the adjacent structural plates 111 can be spaced apart to form a first gap 11c, and multiple first gaps 11c can be defined between the multiple structural plates 111. For example, when N is equal to 3, two first gaps 11c can be defined between the multiple structural plates 111, and when N is equal to 5, four first gaps 11c can be defined between the multiple structural plates 111. Among them, at least one first gap 11c is filled with a reinforcing layer 13, and the reinforcing layer 13 can further enhance the structural rigidity and strength of the battery pack cover 1, thereby further improving the carrying capacity of the battery pack cover 1 for the vehicle body and the passengers and loaded items in the vehicle, further optimizing the deformation resistance of the battery pack cover 1, and thus avoiding the deformation of the battery pack cover 1. The impact on the operation of the internal components of the battery pack can improve the safety and life of the battery pack. In addition, the reinforcing layer 13 can also further provide heat insulation protection between the battery pack and the vehicle body load-bearing surface, further improving the safety inside the vehicle.

[0050] It is understandable that the reinforcement layer 13 may be one and disposed in only one first gap 11 c , or there may be multiple reinforcement layers 13 and disposed in different first gaps 11 c , respectively.

[0051] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the reinforcing layer 13 is constructed as one or more of a foaming layer and a porous plate.

[0052] Specifically, the reinforcing layer 13 can be constructed to include only a foaming layer, the reinforcing layer 13 can also be constructed to include only a porous plate, and the reinforcing layer 13 can also be constructed to include a foaming layer and multi-plate holes. Among them, the foaming layer can be deformed and foamed to fill the first gap 11c. Exemplarily, the foaming layer can be foam, etc.; the porous plate can be a plate with multiple gaps or holes formed on it, and the gaps or holes can provide deformation space. By constructing the reinforcing layer 13 as one or more of a foaming layer and a porous plate, the rigidity, energy absorption and shock absorption capacity, and thermal protection performance of the battery pack cover 1 can be optimized, and it helps to enhance the sound insulation effect of the battery pack cover 1 and improve the riding comfort in the vehicle.

[0053] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, at least one reinforcement layer 13 is configured as a foamed layer.

[0054] Specifically, the reinforcing layer 13 can be constructed as one, or as multiple reinforcing layers 13, and are respectively arranged in different first gaps 11c. In this embodiment, at least one reinforcing layer 13 is constructed as a foaming layer. In this way, it can be ensured that at least one foaming layer is arranged between the battery pack and the load-bearing surface of the vehicle body. Since the foaming layer has good thermal insulation and energy absorption and shock absorption properties, therefore, at least one reinforcing layer 13 is arranged as a foaming layer. This can ensure that the battery pack cover 1 plays a good thermal protection role between the battery pack and the interior of the vehicle, while improving the deformation resistance of the battery pack cover 1, effectively ensuring the working safety of the battery pack, and ensuring safe and reliable driving.

[0055] like Figure 1 As shown, according to some embodiments of the present invention, the structural plate 111 includes: a main plate body 1111 , a side plate body 1112 and a connecting plate body 1113 .

[0056] Among them, one end of the side plate body 1112 is connected to the main plate body 1111, and the other end of the side plate body 1112 is connected to the connecting plate body 1113. The connecting plate body 1113 of multiple structural plates 111 and the protective plate assembly 12 are connected.

[0057] Specifically, the main boards 1111 of the plurality of structural panels 111 are arranged relatively to each other, and each main board 1111 can extend in a first direction (e.g., left-right direction of the vehicle body, front-back direction of the vehicle body, etc.), and the main board 1111 can provide installation positions for vehicle components such as seats, and can play a good bearing role for the occupants and articles in the vehicle, as well as fix and protect the battery pack; the extension direction of the side panel 1112 intersects with the first direction, and one end of the side panel 1112 in the extension direction can be connected to the outer periphery of the main board 1111, and the other end of the side panel 1112 in the extension direction can be connected to the connecting plate 1113, and the side panel 1112 can play a good supporting role for the main board 1111, and allow adjacent main board 1111 to be spaced apart to form a first gap 11c, thereby The structural rigidity and strength of the battery pack cover 1 can be improved, and space can be provided for filling the reinforcing layer 13; one end of the connecting plate body 1113 is connected to the side plate body 1112, and the other end can extend away from the main plate body 1111, and the connecting plate bodies 1113 of multiple structural plates 111 are connected to the protective plate assembly 12, and the connecting plate bodies 1113 and the protective plate assembly 12 can be connected to the vehicle body, so as to realize the assembly of the structural plate assembly and the protective plate assembly 12, as well as the battery pack cover 1 and the vehicle body assembly. The connecting plate bodies 1113 of multiple structural plates 111 are connected to the protective plate assembly 12, which can effectively enhance the connection stability and connection strength between the multiple structural plates 111 and between the structural plates 111 and the protective plate assembly 12, and can further improve the load-bearing and protection reliability of the battery pack cover 1.

[0058] like Figure 1 As shown, according to some embodiments of the present invention, the main board body 1111 and the connecting board body 1113 are substantially parallel.

[0059] Specifically, the first extension surface where the main plate body 1111 is located and the second extension surface where the connecting plate body 1113 is located can be substantially parallel, and the substantially parallel here means that the first extension surface and the second extension surface can be parallel, or the first extension surface and the second extension surface have an angle within 15°. By setting the main plate body 1111 and the connecting plate body 1113 to be substantially parallel, the main plate body 1111, the connecting plate body 1113 and the side plate body 1112 can form a good supporting structure, which can improve the mechanical properties of the structural plate assembly and optimize the deformation resistance and life of the structural plate assembly.

[0060] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, the protection plate assembly 12 includes: a mica board 121, and the mica board 121 is connected to the structural plate assembly.

[0061] Specifically, at least part of the edge of the mica board 121 can be connected to the structural plate assembly. The mica board 121 has a certain thickness in the direction relative to the first surface 11a and the second surface 11b. The mica board 121 is located between the battery pack and the structural plate assembly. Since the mica board 121 has good insulation properties, high temperature resistance and good durability, by providing the mica board 121, the insulation and high temperature protection effects of the battery pack upper cover 1 on the battery pack can be enhanced, which can further improve the working safety of the battery pack and the safety of the driver and passengers.

[0062] It should be pointed out that the mica board 121 can define a third plane away from the second plane, and the third plane is a flat surface, which can improve the flatness of the mica board 121 and the battery pack, and further enhance the insulation and thermal protection effects.

[0063] In addition, in some specific embodiments of the present invention, the projection of the mica board 121 in the relative direction between the first surface 11a and the second surface 11b completely covers the projection of the main board body 1111, the side board body 1112 and the connecting board body 1113 in the relative direction between the first surface 11a and the second surface 11b, so as to ensure the insulation and thermal protection reliability of the mica board 121 for the battery pack.

[0064] like Figure 1 and Figure 2 As shown, according to some embodiments of the present invention, there is a second gap between the mica board 121 and the second surface 11b, and the protective plate assembly 12 further includes: a heat insulation layer 122, and the heat insulation layer 122 is filled in the second gap.

[0065] Specifically, a second gap may be formed between the mica board 121 and the second surface 11b, and the thermal insulation layer 122 may be filled in the second gap to provide good thermal insulation protection. Exemplarily, the thermal insulation layer 122 may be constructed as an aerogel material. When thermal runaway occurs in the battery pack, the thermal insulation layer 122 may effectively prevent the heat of the battery pack from being transferred into the vehicle, thereby improving the personal and property safety of the occupants in the vehicle.

[0066] like Figure 1 and Figure 2 As shown, according to the vehicle of the second aspect of the utility model, the vehicle includes: the battery pack cover 1 described in any one of the above embodiments, and the technical effects produced are consistent with those in the above embodiments, which will not be repeated here.

[0067] 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.

[0068] 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. A battery pack cover, characterized in that: include: A structural panel assembly connected to a vehicle body, the structural panel assembly having a first surface (11a) and a second surface (11b) opposite to each other, at least a portion of the first surface (11a) being formed as a vehicle body load-bearing surface; A protection plate assembly (12), wherein the protection plate assembly (12) is disposed on the second surface (11b) and is at least suitable for heat protection.

2. The battery pack cover according to claim 1, characterized in that: The structural plate assembly comprises: a plurality of structural plates (111) stacked in the relative direction between the first surface (11a) and the second surface (11b), which are defined as a first structural plate to an Nth structural plate in sequence, N≥2, the first structural plate defines the first surface (11a), and the Nth structural plate defines the second surface (11b).

3. The battery pack cover according to claim 2, characterized in that: A first gap (11c) is provided between adjacent structural plates (111), and at least one of the first gaps (11c) is filled with a reinforcement layer (13).

4. The battery pack cover according to claim 3, characterized in that: The reinforcing layer (13) is constructed as one or more of a foaming layer and a porous plate.

5. The battery pack cover according to claim 4, characterized in that: At least one of the reinforcement layers (13) is configured as a foamed layer.

6. The battery pack cover according to claim 2, characterized in that: The structural plates (111) each include: a main plate body (1111), a side plate body (1112) and a connecting plate body (1113); one end of the side plate body (1112) is connected to the main plate body (1111), and the other end of the side plate body (1112) is connected to the connecting plate body (1113); the connecting plate bodies (1113) of the plurality of structural plates (111) and the protective plate assembly (12) are connected.

7. The battery pack cover according to claim 6, characterized in that: The main plate body (1111) and the connecting plate body (1113) are substantially parallel.

8. The battery pack cover according to claim 1, characterized in that: The protective plate assembly (12) comprises a mica plate (121), wherein the mica plate (121) is connected to the structural plate assembly.

9. The battery pack cover according to claim 8, characterized in that: A second gap is provided between the mica board (121) and the second surface (11b), and the protective plate assembly (12) further comprises: a heat insulating layer (122), wherein the heat insulating layer (122) is filled in the second gap.

10. A vehicle, characterized in that: include: The battery pack cover according to any one of claims 1 to 9.

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