CN217035830U - Protection component, shell and battery pack - Google Patents

Abstract

The application provides a protection component, casing and battery package relates to the battery field. The protection assembly comprises a protection plate and a predetermined number of buffering portions, the predetermined number of buffering portions are arranged on the protection plate at intervals along a first direction, the buffering portions comprise a plurality of buffering pieces, the buffering pieces are arranged at intervals along a second direction, the first direction is crossed with the second direction, the liquid cooling plate comprises a flow channel and a groove, the flow channel and the groove are alternately arranged, and the buffering pieces are used for being arranged between the protection plate and the groove. According to the protection component, casing and battery package that this application provided, through setting up the buffer part that sets up along the first direction interval, buffer part includes the bolster that sets up along the interval in the second direction for when dealing with the recess of irregular shape on the liquid cooling board, the bellying that the interval set up in the second direction contacts with the part of recess respectively, has solved the bolster among the current protective structure and can only be applicable to the liquid cooling board that has the recess of regular shape, has richened protection component's service environment.

Description

Protection component, shell and battery pack

Technical Field

The application relates to the field of batteries, in particular to a protection assembly, a shell and a battery pack.

Background

With the market acceptance and the retention of the electric automobile rising year by year and keeping rapid growth, the safety concern of the electric automobile also gradually rises, and the safety of the battery pack as a high-energy-density energy storage component of the electric automobile is about the safety of the whole automobile. Compare in traditional fuel oil car, electric automobile's bottom striking security seems very important, and some battery package whole height is low, and bottom protective structure designs unreasonablely, and barrier propterty is poor, and bottom striking in-process extrudees the runner easily, and the reliability is poor, and the liquid cooling board breaks easily and reveals, thereby more serious striking can lead to the electric core shell to break and arouse the explosion accident that fires.

To the easy cracked problem that appears of liquid cooling board, generally set up protective structure in the below of liquid cooling board at present, be formed with the recess between the runner of liquid cooling board, protective structure includes guard plate and buffer, and the bolster setting is cushioned the atress of liquid cooling board between recess and guard plate, and then has realized the protection of liquid cooling board. However, the buffer member in the existing protection structure can only be applied to the liquid cooling plate with the groove in a regular shape, and the compatibility is poor.

SUMMERY OF THE UTILITY MODEL

In view of this, the application provides a protection component, casing and battery package, through setting up the buffer part that the interval set up in the first direction, buffer part includes the bolster that sets up along the second direction interval for when dealing with the recess of irregular shape on the liquid cooling board, the bellying that sets up along the second direction interval contacts with the part of recess respectively, has solved the bolster among the current protective structure and can only be applicable to the liquid cooling board that has the recess of regular shape, has richened protection component's service environment.

According to an aspect of the application, a protection component is provided, protection component is used for the battery package, the battery package includes the liquid cooling board, protection component includes guard plate and predetermined number's buffering portion, predetermined number the buffering portion along first direction interval set up in the guard plate, the buffering portion includes a plurality of bolster, a plurality of bolsters set up along second direction interval, first direction with the second direction is alternately, the liquid cooling board includes runner and recess, the runner with the recess sets up in turn, the bolster is used for setting up the guard plate with between the recess.

Preferably, the guard plate includes reference plane and bellying, the bellying certainly the reference plane is along the protruding to of third direction the bolster, the bolster set up in the bellying with between the recess, the third direction respectively with first direction with both are perpendicular to the second direction.

Preferably, the buffer member includes a first plane and a second plane, the first plane and the second plane are both perpendicular to the third direction, the protruding portion is formed with a protruding plane at the farthest end in the third direction, the groove includes a recessed plane, the first plane is attached to the protruding plane, and the recessed plane is attached to the second plane.

Preferably, the buffer member is configured to be elastically deformable in the third direction.

Preferably, when the shield assembly is in the first state, the buffer member is not compressed, and the thickness of the buffer member in the third direction is equal to the distance between the convex plane and the concave plane; when the guard assembly is in the second state, the bumper is compressed.

Preferably, the flow channel includes a cooling plane, the cooling plane protrudes toward the buffer member in the third direction relative to the groove, and a distance between the cooling plane and the reference plane is greater than a distance between the recess plane and the protrusion plane.

Preferably, the area of the convex plane is equal to the area of the concave plane.

Preferably, the number of the protrusions is the same as the number of the buffers.

According to a second aspect of the present application, a housing is provided, the housing includes the above-mentioned protection component, the housing further includes an upper housing, a lower housing and the liquid cooling plate, the upper housing, the lower housing, the liquid cooling plate and the protection component are sequentially arranged, a bearing space is formed between the upper housing and the lower housing, and the bearing space is used for arranging a battery module.

According to a third aspect of the present application, there is provided a battery pack including the above-described case and battery module.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 shows a schematic structural diagram of a shield assembly according to an embodiment of the present application;

FIG. 2 shows a schematic structural diagram of a guard plate according to an embodiment of the present application;

fig. 3 shows a schematic view of a buffer arrangement position according to an embodiment of the present application;

FIG. 4 illustrates a partial structural view of a shield assembly mounted to a liquid cooled panel according to an embodiment of the present application;

fig. 5 illustrates a schematic structural view of a battery pack according to an embodiment of the present application.

Icon: 100-a liquid-cooled plate; 110-a flow channel; 120-grooves; 200-a buffer; 300-protection plate; 310-a boss; 410-an upper housing; 420-a lower housing; 430-a battery module; l1-first direction; l2 — second direction; l3-third direction; h1 — first distance; h2 — second distance; h3 — third distance; h4-fourth distance.

Detailed Description

The following detailed description is provided to assist the reader in obtaining a thorough understanding of the methods, devices, and/or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and/or systems described herein will be apparent to those skilled in the art in view of the disclosure of the present application. For example, the order of operations described herein is merely an example, which is not limited to the order set forth herein, but rather, variations may be made in addition to operations which must occur in a particular order, which will be apparent upon understanding the disclosure of the present application. Moreover, descriptions of features known in the art may be omitted for the sake of clarity and conciseness.

The features described herein may be embodied in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and/or systems described herein that will be apparent upon understanding the present disclosure.

Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on," "connected to," coupled to, "over," or "overlying" another element, it may be directly "on," "connected to," coupled to, "over," or "overlying" the other element, or one or more other elements may be present therebetween. In contrast, when an element is referred to as being "directly on," "directly connected to," directly coupled to, "directly on" or "directly over" another element, there may be no intervening elements present.

As used herein, the term "and/or" includes any one of the associated listed items and any combination of any two or more of the items.

Although terms such as "first", "second", and "third" may be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first member, component, region, layer or section discussed in the examples described herein could be termed a second member, component, region, layer or section without departing from the teachings of the examples.

For ease of description, spatial relationship terms such as "above … …," "upper," "below … …," and "lower" may be used herein to describe one element's relationship to another element as illustrated in the figures. Such spatial relationship terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "upper" relative to other elements would then be oriented "below" or "lower" relative to the other elements. Thus, the term "above … …" includes both an orientation of "above … …" and "below … …" depending on the spatial orientation of the device. The device may also be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. The singular forms also are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," and "having" specify the presence of stated features, quantities, operations, elements, components, and/or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and/or combinations thereof.

Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be expected. Thus, examples described herein are not limited to the particular shapes shown in the drawings, but include changes in shape that occur during manufacturing.

The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of this application. Further, while the examples described herein have a variety of configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

According to a first aspect of the present application, there is provided a protection assembly for a battery pack, the battery pack including a liquid cooling plate, as shown in fig. 1, the protection assembly includes a protection plate 300 and a predetermined number of buffer portions, the predetermined number of buffer portions are disposed at intervals in the protection plate 300 along a first direction L1, the buffer portions include a plurality of buffer members 200, the plurality of buffer members 200 are disposed at intervals in a second direction L2, the first direction L1 crosses the second direction L2, as shown in fig. 4, the liquid cooling plate 100 includes a flow channel 110 and a groove 120, the flow channel 110 and the groove 120 are alternately disposed, and the buffer members 200 are disposed between the protection plate 300 and the groove 120. This protection subassembly is through setting up the buffer portion of interval setting on first direction L1, and the buffer portion includes the bolster 200 of interval setting on second direction L2 for when dealing with the recess of irregular shape on the liquid cold board, the bellying that the interval set up on second direction L2 contacts with the part of recess respectively, has solved the liquid cold board that the bolster 200 among the current protective structure can only be applicable to the recess 120 that has regular shape, has richened protection subassembly's service environment.

As shown in fig. 2, the shield plate 300 includes a reference plane formed as a plane on which an upper surface of a portion of the shield plate 300 except the projection 310 is located, and the projection 310 projects from the reference plane in a third direction L3, the projection 310 is formed with a projection plane (an upper plane of the projection 310) at a farthest end from the reference plane in a third direction L3, the first direction L1 is perpendicular to the second direction L2, and the third direction L3 is perpendicular to both the first direction L1 and the second direction L2, respectively. As shown in fig. 4, the liquid-cooled plate 100 includes a cooling plane formed as a plane in which the lower surfaces of the plurality of flow channels 110 are located, and a recessed plane formed as a plane in which the bottoms of the plurality of grooves 120 are located. The buffer member 200 is disposed between the grooves 120 of the liquid-cooled plate 100 of the protrusion 310, and specifically, the buffer member 200 includes a first plane (a lower plane of the buffer member 200) attached to the protrusion plane and a second plane (a lower plane of the buffer member 200) attached to the depression plane. The buffer member 200 is made of super-elastic hard material, when the protection assembly is in the first state, namely the battery pack with the protection structure is disposed on the electric vehicle, and when the bottom of the electric vehicle is not impacted, the guard plate 300 is not impacted, so the guard plate 300 does not apply an acting force to the buffer member 200, the buffer member 200 is not compressed, and when the guard assembly is in the second state, namely, the battery pack with the protection structure is arranged on the electric automobile, and when the bottom of the electric automobile is impacted, the guard plate 300 is applied with a force to the buffer member 200 by striking the guard plate 300, the buffer member 200 is compressed, thus, the impact force applied to the protection plate 300 is transferred to the groove 120 of the liquid cooling plate 100, the flow channel 110 of the liquid cooling plate 100 is not extruded, the flow channel 110 of the liquid cooling plate 100 can be prevented from being broken, and the reliability and the overall safety of the liquid cooling plate 100 are improved.

Preferably, the buffer 200 is made of MPP (MPP, microporous Polypropylene) material.

It should be noted that, as shown in fig. 3, the buffering portion is a buffering member 200 set including a plurality of buffering members 200, the number of the buffering members 200 in the buffering portion may be determined according to requirements, and the number of the buffering portions in the protection assembly is a predetermined number, where the predetermined number may be determined according to the specific size, structure, and the like of the battery pack.

Preferably, as shown in fig. 4, when the shield assembly is in the first state, the thickness of the buffer member in the third direction L3 is a first distance H1, the distance between the concave plane and the reference plane is a second distance H2, the distance between the convex plane and the reference plane is a third distance H3, and the first distance H1 is equal to the difference between the second distance H2 and the third distance H3. Thus, the second plane of the buffer member 200 can be attached to the protruding plane of the protruding portion 310, so as to prevent the buffer member 200 from being compressed when the protection assembly is in the first state, and further prevent the liquid cooling plate 100 from being stressed. Meanwhile, if the first distance H1 is too small, the impact force applied to the protection plate 300 cannot be transmitted to the groove 120, so that the possibility of applying a force to the flow channel 110 is increased, and the risk of damaging the flow channel 110 is increased.

Further, the distance between cooling plane and the reference plane is fourth distance H4, fourth distance H4 is greater than second distance H2, so, can guarantee that bolster 200 transmits the impact that guard plate 300 received fast to recess 120, and simultaneously, distance H3 between protruding plane and the reference plane is improved, can avoid the guard plate 300 bearing capacity that the guard plate 300 rigidity is relatively poor to be caused extremely low, and then the runner 110 who causes receives the force easily warp, the relatively poor problem of reliability and security, make the intensity reinforcing of guard plate 300, and then strengthen protection component's protective capacities. In addition, even when the protection structure reaches the limit state where the third distance is 0, that is, the thickness H1 of the protection component in the third direction L3 is compressed to 0, a gap still exists between the cooling plane and the reference plane, so that the stress on the flow channel 110 can be avoided.

Preferably, the area of the convex plane is equal to that of the concave plane, so that the force-bearing area of the protection plate 300 can be increased, and the liquid cooling plate 100 can be prevented from being damaged.

In addition, the protrusions 310 are formed as reinforcing ribs formed at portions of the protection plate 300, and the weight of the protection plate 300 is significantly reduced compared to the protection plate 300 formed by welding the reinforcing ribs on a flat plate, so that the weight of the protection assembly is reduced, and the energy density of the battery pack having the protection structure is improved.

In addition, in order to better verify the safety problem of the whole mechanical structure of the battery pack, a bottom ball impact experiment can be carried out on the battery pack, the bottom ball impact experiment is used for simulating the structural deformation and damage conditions of the bottom of the battery pack when the electric vehicle is impacted due to the fact that the electric vehicle encounters pothole roads, the top of an uphill slope, road surface obstacles, ground impact objects and the like in the driving process, and the method has important reference significance for verifying the safety and the reliability of the battery pack.

According to a second aspect of the present application, a housing is provided, where the housing includes the above-mentioned protection assembly, and the housing has the same technical effects as the above-mentioned protection assembly, and details are not repeated here.

As shown in fig. 5, the housing includes an upper housing 410, a lower housing 420, a liquid cooling plate 100 and a protection assembly, the liquid cooling plate 100 is disposed below the lower housing 420, the protection assembly is disposed below the liquid cooling plate 100, a bearing space is formed between the upper housing 410 and the lower housing 420, and the bearing space is used for disposing the battery module 430.

According to a third aspect of the present application, a battery pack is provided, where the battery pack includes the casing, and the battery pack has the same technical effects as the casing, and the details are not repeated here.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (10)

1. A protection assembly for a battery pack including a liquid cooling plate, the protection assembly comprising a protection plate and a predetermined number of buffer portions, the predetermined number of buffer portions being disposed on the protection plate at intervals along a first direction, the buffer portions comprising a plurality of buffer members disposed at intervals along a second direction, the first direction crossing the second direction,

the liquid cooling plate comprises a flow channel and grooves, the flow channel and the grooves are alternately arranged, and the buffer piece is used for being arranged between the protection plate and the grooves.

2. The fender assembly of claim 1, wherein the fender includes a reference plane and a raised portion that projects from the reference plane in a third direction toward the bumper, the bumper being disposed between the raised portion and the recess, the third direction being perpendicular to both the first direction and the second direction.

3. The shield assembly of claim 2 wherein said bumper member includes a first planar surface and a second planar surface, both of said first planar surface and said second planar surface being perpendicular to said third direction, said protrusion being formed with a raised planar surface at a distal-most end in said third direction, said recess including a recessed planar surface, said first planar surface being attached to said raised planar surface, said recessed planar surface being attached to said second planar surface.

4. A fender assembly according to claim 3, wherein the bumper is arranged to be resiliently deformable in the third direction.

5. The shield assembly of claim 4, wherein the bumper is uncompressed when the shield assembly is in the first state, the bumper having a thickness in the third direction equal to a distance between the convex plane and the concave plane;

when the guard assembly is in the second state, the bumper is compressed.

6. The shield assembly of claim 3 wherein said flow channel includes a cooling surface, said cooling surface projecting in said third direction relative to said recess toward said bumper,

the distance between the cooling plane and the reference plane is greater than the distance between the recessed plane and the raised plane.

7. The shield assembly of claim 3 wherein the area of the raised flat surface is equal to the area of the recessed flat surface.

8. The shield assembly of claim 2, wherein the number of lobes is the same as the number of bumpers.

9. A housing, characterized in that the housing comprises the protection assembly according to any one of claims 1 to 8, and further comprises an upper housing, a lower housing and the liquid cooling plate, the upper housing, the lower housing, the liquid cooling plate and the protection assembly are arranged in sequence, and a bearing space is formed between the upper housing and the lower housing, and the bearing space is used for arranging a battery module.

10. A battery pack, characterized in that the battery pack comprises the case according to claim 9 and a battery module.

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