Protective plate assembly of battery pack, battery pack and vehicle

Abstract

The utility model relates to a protection plate assembly of a battery pack, the battery pack and a vehicle, the protection plate assembly comprises a plate body, a pressure relief hole is formed in the plate body, the pressure relief hole is used for being arranged corresponding to a pressure relief piece on a battery cell, the plate body comprises a first side and a second side which are oppositely arranged in the first direction, and the first side and the second side are oppositely arranged in the second direction; the first side is one side close to the battery cell; the first protective layer is attached to the first side of the plate body; the first protection layer is attached to the first side of the plate body, the second protection layer is attached to the second side of the plate body, and at least one of the first protection layer and the second protection layer is constructed to be concave towards the pressure relief hole so that the first protection layer and the second protection layer can be connected in the area in the pressure relief hole. The part, in the pressure relief hole, of the first protective layer is constructed as a first pressure relief area, the part, in the pressure relief hole, of the second protective layer is constructed as a second pressure relief area, and the first pressure relief area and the second pressure relief area can be separated after being stressed so as to break through the pressure relief hole.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, and in particular to a protection plate assembly of a battery pack, a battery pack and a vehicle. BACKGROUND

[0002] To avoid thermal runaway in the battery pack, a pressure relief member (such as an explosion-proof valve) is usually arranged on the battery cell of the battery pack, and a pressure relief hole corresponding to the pressure relief member is arranged on the battery pack to release the pressure in the battery pack. In the related art, the arrangement of the pressure relief hole allows water vapor to enter the interior of the battery pack through the pressure relief hole, which causes the risk of failure of the overall insulation and pressure resistance of the battery pack. In addition, when the battery pack is in thermal runaway, although the flame can be discharged through the pressure relief hole, the high-temperature and high-pressure gas heat emitted from the thermal runaway battery cell can also spread and affect the battery cells that have not yet experienced thermal runaway, causing the battery cells to fail in series and increasing the safety hazard. CONTENT OF THE UTILITY MODEL

[0003] To overcome the problems in the related art, the present disclosure provides a protection plate assembly of a battery pack, a battery pack and a vehicle.

[0004] According to a first aspect of an embodiment of the present disclosure, a protection plate assembly of a battery pack is provided, comprising: a plate body, a pressure relief hole being arranged on the plate body, the pressure relief hole being arranged corresponding to a pressure relief member on a battery cell, the plate body comprising a first side and a second side arranged opposite along a first direction, the first side being a side arranged close to the battery cell; a first protection layer attached to the first side of the plate body; and a second protection layer attached to the second side of the plate body, wherein at least one of the first protection layer and the second protection layer is configured to be recessed inwardly toward the pressure relief hole, so that the first protection layer and the second protection layer are connected in the area of the pressure relief hole, a part of the first protection layer in the pressure relief hole is configured as a first pressure relief area, and a part of the second protection layer in the pressure relief hole is configured as a second pressure relief area, the first pressure relief area and the second pressure relief area being capable of being separated after being stressed to open the pressure relief hole.

[0005] Optionally, the first protection layer is configured to be recessed inwardly toward the pressure relief hole, and the second protection layer is configured to be recessed inwardly toward the pressure relief hole.

[0006] Optionally, one of the first protection layer and the second protection layer is configured to be recessed inwardly toward the pressure relief hole, and the other is configured to be parallel to the plate body.

[0007] Optionally, the first protective layer comprises a first insulation region and a first connecting region, and the second protective layer comprises a second insulation region and a second connecting region, the first insulation region is connected with the first pressure relief region through the first connecting region, and the second insulation region is connected with the second pressure relief region through the second connecting region, wherein the first connecting region and the second connecting region can be disconnected after being subjected to force.

[0008] Optionally, the first insulation region and the second insulation region both extend from the side surface of the plate body into the circumferential contour of the pressure relief hole and are connected in the circumferential contour of the pressure relief hole.

[0009] Optionally, the first connecting region and the second connecting region are configured as structural weakening regions.

[0010] Optionally, a plurality of the first connecting regions are arranged at intervals in the circumferential direction of the first pressure relief region, and a plurality of the second connecting regions are arranged at intervals in the circumferential direction of the second pressure relief region.

[0011] Optionally, a plurality of the pressure relief holes are arranged on the plate body along a second direction, the first protective layer is configured as an integral structure and is formed with a plurality of the first pressure relief regions along the second direction, and / or the second protective layer is configured as an integral structure and is formed with a plurality of the second pressure relief regions along the second direction.

[0012] Optionally, the plate body comprises a first plate member and a second plate member arranged along the first direction, the first plate member is connected to a first side of the second plate member, the second plate member is formed with a protruding portion protruding towards the second side to form a flow channel with the second plate member, a plurality of the pressure relief holes and a plurality of the protruding portions are arranged on the plate body along a second direction, the plurality of the pressure relief holes and the plurality of the protruding portions are arranged alternately in the second direction, and the second protective layer is configured as a plurality of separate structures to avoid the protruding portions.

[0013] Optionally, an outer surface of the protruding portion is coated with a first high-temperature-resistant insulation layer.

[0014] Optionally, the first protective layer and the second protective layer are made of basalt fiber fireproof cloth or high-silicon fiber fireproof cloth.

[0015] Optionally, the first protective layer and the second protective layer are configured as two independent layers, or the first protective layer and the second protective layer are collectively configured as an integral structure, and at least in the region covering the pressure relief hole, the first protective layer and the second protective layer are configured as a one-layer structure.

[0016] Optionally, the first protective layer and the second protective layer are bonded by a high-temperature-resistant adhesive.

[0017] According to a second aspect of the embodiments of the present disclosure, a battery pack is provided, comprising a battery cell and the protection plate assembly of the battery pack provided by the present disclosure.

[0018] Optionally, the battery pack comprises a side frame surrounding the outer periphery of the battery cell and a bottom guard plate covering the end side of the side frame, the pressure relief member is arranged at the bottom of the battery cell, and the protection plate assembly is arranged between the battery cell and the bottom guard plate.

[0019] According to a third aspect of the embodiments of the present disclosure, a vehicle is provided, comprising the battery pack provided by the present disclosure.

[0020] The technical solutions provided by the embodiments of the present disclosure can have the following beneficial effects: by arranging the protection layer with the pressure relief area on both sides of the plate body, the sealing and isolation of the pressure relief hole can be achieved, the risk of the entry of external water vapor and the like into the battery pack through the pressure relief hole to cause the insulation and pressure resistance failure of the entire battery pack can be prevented, the safety of the entire battery pack can be improved, and the pressure relief area can be separated from the protection layer after being stressed to open the pressure relief channel for pressure relief. In addition, due to the recessing of the protection layer into the pressure relief hole and the mutual connection, the plate body at the outer periphery of the pressure relief hole can be insulated and isolated from the pressure relief hole, so that the spread and diffusion of thermal runaway through the plate body can be prevented, and the influence of the battery cell in thermal runaway on the adjacent battery cell not in thermal runaway can be avoided.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0023] Figure 1 is an exploded view of a battery pack according to an exemplary embodiment.

[0024] Figure 2 is a schematic view of a battery pack without battery cells according to an exemplary embodiment.

[0025] Figure 3 is Figure 2 is an enlarged view of part A in

[0026] Figure 4 is a schematic view of a battery pack without battery cells according to an exemplary embodiment.

[0027] Figure 5 is Figure 4 is an enlarged view of part B in

[0028] Figure 6is a top view of a battery pack according to an exemplary embodiment.

[0029] Figure 7 is a sectional view C of Figure 6

[0030] Figure 8 is a D portion enlarged view in Figure 7

[0031] Figure 9 is a D portion enlarged view in Figure 7

[0032] Reference Signs List

[0033] 10 - protection plate assembly, 11 - plate body, 111 - pressure relief hole, 112 - first plate piece, 113 - second plate piece, 1131 - protruding portion, 1132 - first high-temperature-resistant insulation layer, 114 - flow channel, 12 - first protection layer, 121 - first pressure relief area, 122 - first insulation area, 123 - first connection area, 13 - second protection layer, 131 - second pressure relief area, 132 - second insulation area, 133 - second connection area, 20 - battery cell, 21 - pressure relief piece, 30 - side frame, 40 - bottom protection plate, 41 - second high-temperature-resistant insulation layer, 50 - fastener. DETAILED DESCRIPTION

[0034] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, the same numbers refer to the same elements throughout the drawings, unless otherwise represented. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Instead, they only represent examples of devices and methods consistent with some aspects of the present disclosure, as detailed in the appended claims.

[0035] To avoid thermal runaway in the battery pack, a pressure relief piece (such as an explosion-proof valve) is usually provided on the battery cell of the battery pack, and a pressure relief hole corresponding to the pressure relief piece is provided on the battery pack to release the pressure in the battery pack. The pressure relief hole can be provided on the shell of the battery pack, or on the cooling plate inside the shell, and there is a pressure relief cavity between the cooling plate and the shell to facilitate the release of pressure. However, the opening of the pressure relief hole allows water vapor to enter the inside of the battery pack through the pressure relief hole, which poses a risk of failure of the overall insulation and pressure resistance of the battery pack. Moreover, when the battery pack experiences thermal runaway, although the flame can be discharged through the pressure relief hole, the high-temperature and high-pressure gas and heat emitted from the thermal runaway battery cell can also spread to the battery cells that have not experienced thermal runaway, causing the battery cells to fail in series and increasing the safety hazard.

[0036] Therefore, the protection plate assembly 10 of the battery pack is provided according to the embodiments of the present disclosure, which combines​​​Figures 1 to 9 The protective plate assembly 10 includes a plate body 11, a first protective layer 12, and a second protective layer 13. The plate body 11 has a pressure relief hole 111, which corresponds to a pressure relief component 21 on the battery cell 20. When a battery cell 20 in the battery pack experiences thermal runaway, the pressure relief component 21 on that cell 20 will open to release the gas and heat inside the cell 20, which will then be released through the pressure relief hole 111.

[0037] The plate 11 includes a first side and a second side disposed opposite to each other along a first direction. The first side is the side disposed close to the battery cell 20, i.e. Figure 1 The top side is shown in the diagram, and the second side is... Figure 1 The lower side is shown in the figure. The first protective layer 12 is attached to the first side (upper side) of the plate 11, and the second protective layer 13 is attached to the second side (lower side) of the plate 11, so that the plate 11 is sandwiched between the two protective layers.

[0038] At least one of the first protective layer 12 and the second protective layer 13 is recessed into the pressure relief hole 111, so that the regions of the first protective layer 12 and the second protective layer 13 within the pressure relief hole 111 are connected. A portion of the first protective layer 12 within the pressure relief hole 111 is configured as a first pressure relief region 121, and a portion of the second protective layer 13 within the pressure relief hole 111 is configured as a second pressure relief region 131. The first pressure relief region 121 and the second pressure relief region 131 can detach under stress to open the pressure relief hole 111. It is understood that since the first protective layer 12 and the second protective layer 13 within the pressure relief hole 111 are connected, and the pressure relief region is a portion of the protective layer within the pressure relief hole 111, when the pressure relief region detaches, a portion of the protective layer within the pressure relief hole 111 remains connected, providing insulation and isolation between the plate 11 circumferentially connected to the pressure relief hole 111. Figure 8 and Figure 9 As shown, the protective layer can be configured to extend radially inward from the inner wall of the pressure relief hole 111 after being detached from the pressure relief zone, with the extended portions of the protective layer connected to each other to insulate the plate 11.

[0039] Through the above technical solution, by setting a protective layer with a pressure relief area on both sides of the plate 11, the pressure relief hole 111 can be sealed and isolated, preventing external moisture and other substances from entering the battery pack through the pressure relief hole 111 and causing the risk of insulation withstand voltage failure of the entire battery pack, thus helping to improve the overall safety of the battery pack. Furthermore, the pressure relief area can detach from the protective layer after being subjected to force, thereby opening a pressure relief channel for pressure relief. In addition, because the protective layer is recessed into and interconnected with the pressure relief hole 111, the plate 11 at the outer periphery of the pressure relief hole 111 can be insulated from the pressure relief hole 111, thereby preventing thermal runaway from spreading through the plate 11 and avoiding the thermal runaway cell 20 affecting adjacent cells 20 that have not experienced thermal runaway.

[0040] In an embodiment, one of the first protective layer 12 and the second protective layer 13 can be recessed towards the pressure relief hole 111, and the other can be flush with the plate body 11, i.e. not recessed towards the pressure relief hole 111. For example, the first protective layer 12 can be recessed towards the pressure relief hole 111, so that the first protective layer 12 can avoid the pressure relief member 21, thereby providing sufficient installation space for the pressure relief member 21, while the second protective layer 13 can not be recessed, and the first protective layer 12 is recessed to be connected with the second protective layer 13; or, the first protective layer 12 can not be recessed, and the second protective layer 13 can be recessed towards the pressure relief hole 111 to be connected with the first protective layer 12, so that the pressure relief area is as close as possible to the pressure relief member 21, to ensure that the pressure relief member 21 can have sufficient impact force to impact the pressure relief area to separate from the protective layer when the pressure relief member 21 is opened.

[0041] In other embodiments, referring to Figure 8 , the first protective layer 12 can be configured to be recessed towards the pressure relief hole 111, and the second protective layer 13 can also be configured to be recessed from the second protective layer 13 towards the pressure relief hole 111. This arrangement can ensure that the pressure relief member 21 has sufficient installation space, and can also ensure that the distance between the pressure relief area and the pressure relief member 21 can be ensured to be effectively impacted by the pressure relief member 21 to separate.

[0042] Referring to Figure 3 , Figure 5 , Figure 8 and Figure 9 , the first protective layer 12 can include a first insulation area 122 and a first connecting area 123, and the second protective layer 13 can include a second insulation area 132 and a second connecting area 133, the first insulation area 122 and the first pressure relief area 121 are connected through the first connecting area 123, and the second insulation area 132 and the second pressure relief area 131 are connected through the second connecting area 133, wherein the first connecting area 123 and the second connecting area 133 can be disconnected under stress. As shown in Figure 3 and Figure 8 , it is shown that the pressure relief member 21 is not opened, and the first connecting area 123 and the second connecting area 133 are not disconnected, as shown in Figure 5 and Figure 9 , it is shown that the pressure relief member 21 is opened, and the first connecting area 123 and the second connecting area 133 are disconnected under impact force. Through the stress disconnection of the connecting area, the pressure relief area can be separated from the protective layer, while the insulation area remains to play an insulation role.

[0043] Referring to Figure 8The first insulation area 122 and the second insulation area 132 can both extend from the side of the plate body 11 to the circumferential contour of the pressure relief hole 111 and can be connected within the circumferential contour of the pressure relief hole 111. Specifically, the first insulation area 122 and the second insulation area 132 are respectively arranged on the two sides of the plate body 11, which can insulate and protect the two sides of the plate body 11. In addition, after the first insulation area 122 and the second insulation area 132 extend from the corresponding side of the plate body 11 to the pressure relief hole 111 and are connected, the plate body at the side wall of the pressure relief hole 111 can be insulated and protected, thereby achieving the omnidirectional and complete insulation protection effect of the plate body 11 near the pressure relief hole 111.

[0044] To achieve that the first connecting area 123 and the second connecting area 133 can be disconnected under stress, the first connecting area 123 and the second connecting area 133 can be configured as a structural weakening area. It can be understood that the structural weakening area refers to that the structural strength of the area is smaller, and the bearing capacity is poorer than other areas, thereby ensuring timely disconnection during pressure relief.

[0045] In an embodiment, the structural weakening area can be achieved by subtractive structure, for example, the thickness of the first connecting area 123 and the second connecting area 133 can be set to be smaller than the thickness of other areas of the protective layer. Alternatively, in an embodiment, as shown in Figure 3 , a plurality of first connecting areas 123 can be arranged at the circumferential interval of the first pressure relief area 121, and a plurality of second connecting areas 133 can be arranged at the circumferential interval of the second pressure relief area 131. In this way, the connecting areas are not arranged everywhere at the outer periphery of the pressure relief area, so that the connecting strength of the insulation area and the pressure relief area is smaller, thereby ensuring timely and effective fracture.

[0046] Referring to Figure 1 , a plurality of pressure relief holes 111 are arranged on the plate body 11 along the second direction. In this embodiment, the first protective layer 12 can be configured as a one-piece structure, and a plurality of first pressure relief areas 121 are formed along the second direction. In an embodiment, the second protective layer 13 can be configured as a one-piece structure, and a plurality of second pressure relief areas 131 are formed along the second direction. The one-piece structure is simpler to install, which simplifies the installation steps.

[0047] According to an embodiment of the present disclosure, referring to Figure 8 and Figure 9 , the plate body 11 can include a first plate 112 and a second plate 113 arranged along the left-right direction of the plane in the first direction Figure 8 and Figure 9 , the first plate 112 is connected to the first side of the second plate 113, and the second plate 113 forms a protruding portion 1131 protruding towards the second side to form a flow channel 114 with the second plate 113, i.e., the plate body 11 can be configured as a cooling plate. The plate body 11 is arranged along the second directionFigure 8 and Figure 9 The plurality of pressure relief holes 111 and the plurality of protrusions 1131 are arranged alternately in the second direction. In this embodiment, the second protective layer 13 can be configured as a plurality of split structures to avoid the protrusions 1131. The protective layer can be provided in the area between the pressure relief holes 111 and the protrusions 1131 to meet the insulation requirement, and the protective layer is not provided in the protrusions 1131 to save material cost.

[0048] To further ensure the insulation effect, the outer surface of the protrusion 1131 is coated with a first high-temperature-resistant insulation layer 1132, which can effectively prevent the plate body 11 from becoming a conductor when the battery cell 20 is in thermal runaway.

[0049] In the embodiments of the present disclosure, the first protective layer 12 and the second protective layer 13 can be made of basalt fiber fireproof cloth or high-silica fiber fireproof cloth, for example, one layer can be made of basalt fiber fireproof cloth, the other layer can be made of high-silica fiber fireproof cloth, or both layers can be made of basalt fiber fireproof cloth or high-silica fiber fireproof cloth. This material can ensure that the material remains insulating after the battery cell 20 is in thermal runaway.

[0050] In the embodiments of the present disclosure, the first protective layer 12 and the second protective layer 13 can be configured as two independent layers, and the two protective layers can be connected in the area of the pressure relief hole 111. This independent mode is convenient for manufacturing and replacement.

[0051] In other embodiments, the first protective layer 12 and the second protective layer 13 can also be configured as an integrated structure. At least in the area covering the pressure relief hole 111, it is configured as a one-layer structure. For example, the first protective layer 12 and the second protective layer 13 can be configured as a one-layer structure as a whole, and the one-layer structure is divided into two layers in the area corresponding to the plate body 11, thereby forming a two-layer structure; or in the area covering the pressure relief hole 111, it is configured as a one-layer structure, and the two protective layers can be fused into a one-layer structure in the area covering the pressure relief hole 111 during manufacturing, so that the first protective layer 12 and the second protective layer 13 maintain an integrated structure. This integrated structure can reduce the number of parts and is convenient for installation.

[0052] When the two independent protective layers are adopted, to ensure the connection stability of the first protective layer 12 and the second protective layer 13, the first protective layer 12 and the second protective layer 13 can be bonded by a high-temperature-resistant adhesive.

[0053] According to the second aspect of the embodiments of the present disclosure, with reference to Figure 1, provide a battery pack comprising the battery cell 20 and the above-mentioned battery pack protection plate assembly 10, and have all the beneficial effects of the above-mentioned battery pack protection plate assembly 10, which will not be repeated here.

[0054] Wherein the battery pack comprises a side frame 30 surrounding the outer periphery of the battery cell 20 and a bottom protection plate 40 covering the end side of the side frame 30, the pressure relief member 21 is arranged at the bottom of the battery cell 20, and the protection plate assembly 10 is arranged between the battery cell 20 and the bottom protection plate 40. The protection plate assembly 10 and the bottom protection plate 40 can form a pressure relief cavity of the pressure relief hole 111, and the side of the bottom protection plate 40 close to the protection plate assembly 10 can be coated with a second high-temperature-resistant insulation layer 41, as shown in Figure 8 and Figure 9 to insulate when thermal runaway occurs to prevent the bottom protection plate 40 from forming a conductor.

[0055] Taking the first protection layer 12 and the second protection layer 13 as two independent layers for example, the assembly process of the battery pack in the embodiment of the present disclosure can be as follows: first, the parts of the first protection layer 12 and the second protection layer 13 located in the pressure relief hole 111 are bonded by high-temperature-resistant adhesive, and the protection layers on both sides of the plate body 11 are fixed and pasted with the plate body, and if the first protection layer 12 and the second protection layer 13 are integrally structured together, the bonding step can be omitted; second, the plate body 11 is bonded and tightly connected with the side frame 30 around; third, the bottom protection plate 40 is connected to the bottom end of the side frame 30 through the fastener 50, and sealing glue or sealing surface is added at the fixed boundary between the two to seal the cavity between the plate body 11 and the bottom protection plate 40.

[0056] According to a third aspect of the embodiment of the present disclosure, a vehicle is provided, comprising the above-mentioned battery pack, and having all the beneficial effects of the above-mentioned battery pack, which will not be repeated here.

[0057] In the above detailed description, reference is made to the accompanying drawings, which show by way of illustration specific aspects in which the disclosure can be practiced. In this regard, reference is made to the orientation of the described figures in using terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate directional orientation or positional relationship. Since the components of the described devices can be positioned in a plurality of different orientations, the directional terms can be used for illustrative purposes, but not limitative. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concept of the present disclosure. Therefore, the following detailed description should not be regarded as limiting in nature.

[0058] It should be understood that the features of various ones of the example embodiments of the present disclosure described herein can be combined with each other, unless specifically noted otherwise. As used in the present document, the term "and / or" includes any

[0059] It should be understood that, unless otherwise specifically noted, the terms "joined", "attached", "mounted", "connected", "linked", "fixed" and the like as used herein are to be construed broadly, for example, as either fixed connections, or detachable connections, or integral; as either mechanical connections, or electrical connections, or communicable with each other; as either direct connections, or indirect connections via intermediate medium; as either internal connection or interaction between two elements, or interaction between two elements, unless otherwise specifically defined. The specific meaning of the above terms in the present document can be understood according to the specific circumstances by those skilled in the art.

[0060] Further, the word "over" as used in describing a component, element, or material layer "over" a surface in the formation or location of the component, element, or material layer "over" the surface can be used herein to mean that the component, element, or material layer is positioned (e.g., placed, formed, deposited, etc.) "indirectly" on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or material layer. However, the word "over" as used in describing a component, element, or material layer "over" a surface in the formation or location of the component, element, or material layer "over" the surface can also optionally have the specific meaning that the component, element, or material layer is positioned (e.g., placed, formed, deposited, etc.) "directly" on the surface, e.g., in direct contact with the surface.

[0061] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections are not limited by these terms. Instead, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, the first element, component, region, layer or section mentioned in the examples described herein can also be referred to as a second element, component, region, layer or section, without departing from the teachings of the examples. In addition, the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description herein, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless specifically defined otherwise.

[0062] It should be understood that spatial relative terms, such as “above,” “upper,” “below,” and “lower,” are used herein to describe the relationship between one element and another shown in the figures. In addition to the orientation depicted in the figures, these spatial relative terms are also intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as “above” or “upper” relative to another element would be “below” or “lower” relative to that other element. Thus, depending on the spatial orientation of the device, the term “above” encompasses both above and below orientations. Devices may have other orientations (e.g., rotated 90 degrees or in other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0063] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0064] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding this specification and the accompanying drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0065] Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the concepts disclosed herein. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

[0066] It is to be understood that the disclosure is not limited to the precise construction herein described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the disclosure. The scope of the disclosure is limited only by the claims that follow.

Claims

1. A battery pack guard plate assembly, comprising: The plate body is provided with a pressure relief hole corresponding to a pressure relief member on the battery cell, and the plate body comprises a first side and a second side arranged opposite along a first direction, wherein the first side is arranged close to the battery cell. The first protective layer is arranged on the first side of the plate body. The second protective layer is arranged on the second side of the plate body. At least one of the first protective layer and the second protective layer is configured to be recessed inwardly towards the pressure relief hole, so that the first protective layer and the second protective layer are connected in the area of the pressure relief hole, a part of the first protective layer in the pressure relief hole is configured as a first pressure relief area, and a part of the second protective layer in the pressure relief hole is configured as a second pressure relief area, wherein the first pressure relief area and the second pressure relief area can be separated after being stressed to open the pressure relief hole. The first protective layer is configured to be recessed inwardly towards the pressure relief hole, and the second protective layer is configured to be parallel to the plate body. One of the first protective layer and the second protective layer is configured to be recessed inwardly towards the pressure relief hole, and the other is configured to be parallel to the plate body.

2. The battery pack kick plate assembly of claim 1, wherein, The first protective layer comprises a first insulation area and a first connecting area, and the second protective layer comprises a second insulation area and a second connecting area, wherein the first insulation area and the first pressure relief area are connected through the first connecting area, and the second insulation area and the second pressure relief area are connected through the second connecting area, and the first connecting area and the second connecting area can be disconnected after being stressed.

3. The battery pack kick plate assembly of claim 1, wherein, The first insulation area and the second insulation area extend from the side of the plate body to the circumferential contour of the pressure relief hole and are connected in the circumferential contour of the pressure relief hole.

4. The battery pack kick plate assembly of claim 1, wherein, The first connecting area and the second connecting area are configured as a structural weakening area.

5. The battery pack kick plate assembly of claim 4, wherein, A plurality of first connecting areas are arranged in the circumferential direction of the first pressure relief area, and a plurality of second connecting areas are arranged in the circumferential direction of the second pressure relief area.

6. The battery pack kick plate assembly of claim 4, wherein, The plate body is provided with a plurality of pressure relief holes arranged along a second direction, the first protective layer is configured as an integral structure and is provided with a plurality of first pressure relief areas along the second direction, and / or the second protective layer is configured as an integral structure and is provided with a plurality of second pressure relief areas along the second direction.

7. The battery pack kick plate assembly of claim 6, wherein, The plate body comprises a first plate member and a second plate member arranged along the first direction, the first plate member is connected to the first side of the second plate member, the second plate member is provided with a protruding portion protruding towards the second side to form a flow channel with the second plate member, the plate body is provided with a plurality of pressure relief holes and a plurality of protruding portions arranged along a second direction, the plurality of pressure relief holes and the plurality of protruding portions are arranged alternately along the second direction, and the second protective layer is configured as a plurality of separate structures to avoid the protruding portions.

8. The battery pack kick plate assembly of claim 1, wherein, An outer surface of the protruding portion is coated with a first high-temperature-resistant insulation layer.

9. The battery pack kick plate assembly of claim 1, wherein, The first protective layer and the second protective layer are made of basalt fiber fireproof cloth or high-silicon fiber fireproof cloth.

10. The battery pack kick plate assembly of claim 9, wherein, ​ 11. The battery pack kick plate assembly of claim 1, wherein, ​ 12. The battery pack kick plate assembly of claim 1, wherein, The first protective layer and the second protective layer are configured as two independent layers, or the first protective layer and the second protective layer are configured as an integrated structure, and at least in the area covering the pressure relief hole, the first protective layer and the second protective layer are configured as a one-layer structure.

13. The battery pack kick plate assembly of claim 1, wherein, The first protective layer and the second protective layer are bonded by a high-temperature-resistant adhesive.

14. A battery pack, characterized by A protective plate assembly comprising a battery pack and an electric core according to any one of claims 1-13.

15. The battery pack of claim 14, wherein, The battery pack comprises a side frame surrounding the outer periphery of the electric core and a bottom guard plate covering the end side of the side frame, the pressure relief member is arranged at the bottom of the electric core, and the protective plate assembly is arranged between the electric core and the bottom guard plate.

16. A vehicle characterized by A battery pack comprising the battery pack according to claim 14 or 15.

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