CN217062320U - Backplate, battery package and vehicle at bottom of battery package - Google Patents

Abstract

The utility model relates to the technical field of vehicles, especially, relate to a backplate, battery package and vehicle at bottom of battery package. The utility model provides a backplate at bottom of battery package, including the backplate main part at the bottom, the upper surface of backplate main part at the bottom is equipped with bellied bearing structure, and bearing structure is used for supporting the part that is located the top of backplate main part at the bottom to reduce the area of contact of backplate main part at the bottom and the part that is located the top of backplate main part at the bottom. The utility model provides a backplate at bottom of battery package is equipped with bellied bearing structure through the upper surface at backplate main part at the bottom, utilizes bearing structure to support the part that is located the top of backplate main part at the bottom like liquid cooling board etc. can reduce the area of contact of backplate main part and top part at the bottom to improve the heat preservation performance that the heat interaction between backplate main part and the top part leads to and reduce, thereby improved the heat preservation performance of battery package.

Description

Backplate, battery package and vehicle at bottom of battery package

Technical Field

The utility model relates to the technical field of vehicles, especially, relate to a backplate, battery package and vehicle at bottom of battery package.

Background

Along with the national strong advocation of green travel, the electric automobile industry is increasingly vigorous, and the demand of users on electric automobiles is higher and higher. The battery pack is one of the core components of the electric automobile, and the battery pack is usually installed at the bottom of the automobile body and directly exposed to the chassis area of the automobile body. However, such a design results in that the heat inside the battery pack is easily conducted to the external environment through the battery pack bottom protection plate, thereby affecting the electrical performance of the battery pack.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present disclosure provides a battery pack bottom guard plate, a battery pack and a vehicle.

The present disclosure provides a battery package backplate, includes: the bottom guard plate comprises a bottom guard plate main body, wherein a raised supporting structure is arranged on the upper surface of the bottom guard plate main body and used for supporting a part positioned above the bottom guard plate main body, so that the contact area between the bottom guard plate main body and the part positioned above the bottom guard plate main body is reduced.

Optionally, the support structure comprises at least one raised rib provided on the upper surface of the backplate body.

Optionally, backplate at the bottom of backplate main part is the aluminium alloy, backplate's inside is formed with the die cavity at the bottom of the aluminium alloy, backplate at the bottom of the aluminium alloy double-phase relative tip have with the opening of die cavity intercommunication, install on the backplate at the bottom of the aluminium alloy and be used for the shutoff the open-ended board of sealing.

Optionally, two opposite end portions of the aluminum section bottom protection plate are respectively provided with a groove, and the sealing plate is embedded in the grooves and is welded and fixed with the aluminum section bottom protection plate.

Optionally, a sealing strip is installed at the periphery of the upper surface of the backplate main body, and the backplate main body is connected with the frame of the battery box body in a sealing manner through the sealing strip; and a flame baffle is arranged on the periphery of the bottom protection plate main body, and the upper surface of the flame baffle is higher than that of the bottom protection plate main body, so that the periphery of the sealing strip is shielded.

Optionally, a bolt hole is formed in the bottom guard plate main body, the bottom guard plate main body is fixedly connected with a frame of the battery box body through a fixing bolt penetrating through the bolt hole, a guard plate buckle is installed at the bolt hole, and the guard plate buckle covers the fixing bolt.

The present disclosure also provides a battery pack including the battery pack bottom guard plate according to any of the above embodiments.

Optionally, the battery package includes a plurality of battery modules that set gradually in the top of backplate at the bottom of the battery package, and is adjacent be equipped with the liquid cooling board between the battery module, the bottom support of liquid cooling board in on the bearing structure of backplate at the bottom of the battery package.

Optionally, an insulation board is arranged between the top of the support structure and the bottom of the liquid cooling board.

The present disclosure also provides a vehicle including the battery pack according to the above embodiment.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the utility model provides a backplate at bottom of battery package, battery package and vehicle, upper surface through at the backplate main part is equipped with bellied bearing structure at the end, utilize bearing structure to support the part that is located the top of backplate main part at the end like liquid cooling board etc, compare in the upper surface for planar backplate at the end, upper surface through backplate main part at the end sets up bellied bearing structure, can reduce the area of contact of backplate main part and the part that is located the top of backplate main part at the end, thereby it is mutual with the heat that is located between the part of the top of backplate main part at the end to reduce backplate main part at the end, thereby it conducts to external heat to reduce the inside via backplate at the end of battery package, thereby the thermal insulation performance of battery package has been improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the embodiments or technical solutions in the prior art description will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is an exploded view of a battery pack bottom guard according to some embodiments of the present disclosure;

fig. 2 is a schematic structural view of an aluminum profile bottom guard plate according to some embodiments of the present disclosure;

fig. 3 is a schematic top view of an aluminum bottom guard plate according to some embodiments of the present disclosure;

FIG. 4 is a cross-sectional view along the line A-A in FIG. 3;

FIG. 5 is an enlarged view of the portion B in FIG. 4;

fig. 6 is a schematic structural view of an aluminum bottom protective plate and a sealing plate before assembly according to some embodiments of the disclosure;

fig. 7 is a schematic structural view of an assembled aluminum bottom guard plate and sealing plate according to some embodiments of the present disclosure;

FIG. 8 is an enlarged view of the portion C of FIG. 7;

FIG. 9 is a schematic view of an assembly structure of an aluminum bottom guard plate, a sealing strip and a flame baffle according to some embodiments of the disclosure;

FIG. 10 is an enlarged view of the portion D in FIG. 9;

FIG. 11 is an enlarged view of section E of FIG. 9;

fig. 12 is a schematic view of an assembly structure of the aluminum profile bottom guard plate, the fixing bolt and the guard plate fastener according to some embodiments of the present disclosure;

FIG. 13 is an enlarged view of the portion F in FIG. 12;

fig. 14 is a schematic structural view of a battery pack according to some embodiments of the present disclosure;

fig. 15 is a schematic top view of a battery pack according to some embodiments of the present disclosure;

FIG. 16 is a schematic sectional view taken along line G-G in FIG. 15;

FIG. 17 is an enlarged view of the section H in FIG. 16;

FIG. 18 is a schematic structural view of a cellular aluminum floor backplate according to some embodiments of the present disclosure;

FIG. 19 is an enlarged view of section I of FIG. 18;

FIG. 20 is a schematic structural view of a foamed aluminum sandwich floor sheathing according to some embodiments of the present disclosure;

fig. 21 is an enlarged view of the portion J of fig. 20.

Wherein, 1-battery bottom protection plate;

10-aluminum section bottom guard board; 100-a support structure; 101-aluminum profile bottom plate; 102-friction stir welding seam; 103-PVC stone-strike-resistant glue; 104-bolt holes; 11-sealing plate; 111-front sealing plate; 112-rear sealing plate; 113-arc welding; 12-a sealing strip; 13-flame baffle; 14-fixing a rivet; 15-sealing ring; 16-a fixing bolt; 17-guard plate buckle;

18-honeycomb aluminum plate bottom guard board; 181-a first aluminum plate layer; 182-aluminum honeycomb core; 183-a second aluminum plate layer;

19-foamed aluminum sandwich plate bottom guard plate; 191-a first aluminum plate; 192-foamed aluminum plate; 193-a second aluminum plate;

2-a battery module; 3-liquid cooling plate; 4-connecting a pipeline; 5-liquid inlet; 6-a liquid outlet; 7-heat insulation board.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

As shown in fig. 1, an embodiment of the present disclosure provides a battery bottom protection plate 1, including: the bottom protection plate comprises a bottom protection plate main body, wherein a raised supporting structure 100 is arranged on the upper surface of the bottom protection plate main body, and the supporting structure 100 is used for supporting a component (such as a liquid cooling plate) positioned above the bottom protection plate main body so as to reduce the contact area between the bottom protection plate main body and the component positioned above the bottom protection plate main body.

According to the battery pack bottom guard plate 1 provided by the embodiment of the disclosure, the upper surface of the bottom guard plate main body is provided with the convex supporting structure 100, the supporting structure 100 is utilized to support components above the bottom guard plate main body, such as the liquid cooling plate 3, and compared with a bottom guard plate with a plane upper surface, the contact area between the bottom guard plate main body and the components above the bottom guard plate main body can be reduced by arranging the convex supporting structure 100 on the upper surface of the bottom guard plate main body, so that the heat interaction between the bottom guard plate main body and the components above the bottom guard plate main body is reduced, the heat conducted from the inside of a battery pack to the outside through the bottom guard plate is reduced, and the heat insulation performance of the battery pack is improved; further, the heat insulation board 7 with a low heat conductivity coefficient can be used at the top of the supporting structure 100 in a matched manner, so that the heat insulation requirement inside the battery pack is met.

In some embodiments, as shown in FIG. 1, the support structure includes at least one raised rib disposed on the upper surface of the backplate body. The part above the bottom protection plate main body is supported by the raised ribs, so that the contact area of the bottom protection plate main body and the part above the bottom protection plate main body is reduced. In specific implementation, the top size of the raised ribs can be designed as required so as to reduce the top size of the raised ribs as much as possible on the basis of meeting the support stability, thereby reducing the contact area between the bottom protective plate and the component above the bottom protective plate as much as possible, reducing heat dissipation and improving the thermal insulation performance of the battery pack. The number of the raised ribs can be reasonably set according to the number of the components to be supported, and is not particularly limited herein. In one embodiment, as shown in fig. 1, 4 protruding ribs are provided on the upper surface of the backplate main body, the 4 protruding ribs extend in parallel along the length direction (or width direction) of the backplate main body, and the 4 protruding ribs are respectively used for supporting 4 liquid cooling plates.

In a specific embodiment, the bottom guard plate main body can adopt an aluminum bottom guard plate, and compared with a steel stamping metal plate bottom guard plate, the aluminum bottom guard plate has the advantages of small density, light weight and the like, and is favorable for meeting the requirement of light weight of the battery pack; specifically, the aluminum bottom cover sheet may be an aluminum-profile bottom cover sheet 10 (as shown in fig. 1 to 17), a honeycomb aluminum-profile bottom cover sheet 18 (as shown in fig. 18 and 19), or a foamed aluminum sandwich bottom cover sheet 19 (as shown in fig. 20 and 21), and the aluminum bottom cover sheet may have sufficient structural strength to meet the structural strength requirement of the battery pack for the bottom cover sheet by using the above materials and structural forms. Of course, the bottom guard plate main body can also adopt other materials and structural forms, such as a steel bottom guard plate, and the like, as long as the requirement on the structural strength of the bottom guard plate can be met.

In some embodiments, as shown in fig. 2 to 4, the bottom guard plate body is an aluminum-profile bottom guard plate 10, specifically, the aluminum-profile bottom guard plate 10 may be an extruded aluminum profile, and a high-strength cavity is formed inside the aluminum-profile bottom guard plate 10.

In a specific embodiment, as shown in fig. 2, the aluminum bottom guard plate 10 may be formed by splicing a plurality of aluminum bottom plates 101 (e.g., two, three, four, etc.), and specifically, the aluminum bottom guard plate 10 may be formed by welding the plurality of aluminum bottom plates 101 by friction stir welding. Of course, the aluminum bottom protection plate 10 can also be an aluminum bottom plate 101 without being spliced.

For convenience of showing the sectional structure of the aluminum section bottom guard plate 10, the sectional view is shown in fig. 4, and the partially enlarged sectional view is shown in fig. 5, which is taken along the plane a-a as shown in fig. 3. And friction stir welding seams 102 are formed between two adjacent aluminum profile bottom plates 101. In order to improve the stone-impact resistance of the aluminum-profile bottom protective plate 10, PVC stone-impact-resistant glue 103 is arranged on the whole bottom surface of the aluminum-profile bottom protective plate 10, and in addition, the PVC stone-impact-resistant glue 103 also has a heat preservation effect, so that the heat preservation performance of the battery pack is improved.

In some embodiments, as shown in fig. 1, 6 to 8, a cavity is formed inside the aluminum bottom guard plate 10, two opposite ends of the aluminum bottom guard plate 10 have openings communicating with the cavity, and a sealing plate 11 for sealing the openings is mounted on the aluminum bottom guard plate 10.

Particularly, because the region of the upper surface of the aluminum profile bottom protection plate 10 is the liquid cooling plate 3 and the battery cell region, if the cavity of the aluminum profile bottom protection plate 10 is not plugged, air can flow through the cavity of the aluminum profile bottom protection plate 10 in the driving process, so that heat exchange inside and outside the battery pack is accelerated, the temperature of the battery cell is reduced, and the cruising and performance of the whole vehicle are influenced. Therefore, in the embodiment of the present disclosure, the sealing plate 11 is installed on the aluminum-profile bottom protective plate 10, and the sealing plate 11 plays a role in sealing the cavity of the aluminum-profile bottom protective plate 10, so that the reduction of the heat preservation effect of the battery pack caused by the flow of cold air during driving is reduced.

In a specific implementation, in the case that the aluminum bottom protection plate 10 is formed by splicing a plurality of aluminum bottom plates 101, as shown in fig. 6, one sealing plate 11 (also referred to as a front sealing plate 111 and a rear sealing plate 112) may be respectively arranged in front of and behind each aluminum bottom plate 101 to seal the cavity. Of course, a single sealing plate 11 may be disposed at the front and rear of the aluminum bottom plate 10 to seal the cavity of the aluminum bottom plate 10.

Further, in order to fix the sealing plate 11 on the aluminum section bottom protection plate 10, as shown in fig. 7 and fig. 8, two opposite end portions of the aluminum section bottom protection plate 10 are respectively provided with a groove, and the sealing plate 11 is embedded in the groove and is welded and fixed with the aluminum section bottom protection plate 10. So set up, both can guarantee to seal board 11 and the aluminium alloy backplate 10 fixed fastness at the bottom of, realize again that sealing board 11 inlays in the recess of backplate 10 at the bottom of the aluminium alloy, do not influence the whole outward appearance effect of backplate 10 at the bottom of the aluminium alloy.

In order to clearly show the mounting and fixing structure of the sealing plate 11 on the aluminum profile bottom protection plate 10, the mounting and fixing structure of the sealing plate 11 is shown in an enlarged scale at the position shown in fig. 7. The material and the technology of sealing board 11 are the aluminum plate of bending in advance, its fixed welding on backplate 10 is shown in fig. 8 at the bottom of the aluminium alloy, the installation of sealing board 11 needs the opening position at backplate 10's tip at the bottom of the aluminium alloy in advance, set up the recess, that is to say, break or cut off a part with the muscle that the opening position is connected between adjacent opening, thereby backplate 10's tip forms the structure of flute profile at the bottom of the aluminium alloy, will seal in the recess of backplate 10 at the bottom of the plate 11 embedding aluminium alloy, then fix on backplate at the bottom of with arc-welding, backplate 10 forms arc welding 113 at the bottom of the aluminium alloy with sealing between the plate 11, realize sealing board 11 firmly fixed on backplate 10 at the bottom of the aluminium alloy, thereby guarantee reliability in the whole car life cycle.

In some embodiments, as shown in fig. 1 and 9, a sealing strip 12 is installed at the periphery of the upper surface of the aluminum-profile backplate 10, and the aluminum-profile backplate 10 is connected with the frame of the battery box body in a sealing manner through the sealing strip 12, so that the sealing performance of the accommodating cavity formed by the aluminum-profile backplate 10 and the frame of the battery box body is ensured. Further, as shown in fig. 1, a sealing ring 15 may be further disposed between the upper surface of the aluminum-profile backplate 10 and the frame of the battery box (or other components of the battery box), and both the sealing strip 12 and the sealing ring 15 play a role in sealing the aluminum-profile backplate 10 and the battery box.

Further, as shown in fig. 9 to 11, a flame baffle 13 is installed on the periphery of the aluminum profile bottom protection plate 10, and the upper surface of the flame baffle 13 is higher than the upper surface of the aluminum profile bottom protection plate 10 to form a shield on the periphery of the sealing strip 12, so that when a fire test is performed on the bottom of the battery pack, the sealing strip 12 can be protected by the flame baffle 13, and sealing failure caused by burning of the sealing strip 12 by flame can be avoided.

In a specific implementation, as shown in fig. 1 and 9, detachable flame baffles 13 are respectively arranged at four corner positions of the aluminum bottom guard plate 10, and preferably, the flame baffles 13 on the left and right sides are symmetrical parts. The design details of the flame baffle 13 are shown in the enlarged partial views 10 and 11, wherein fig. 10 is a schematic enlarged partial view of the flame baffle 13 at the corner position of the rear end of the aluminum profile bottom guard plate 10, and fig. 11 is a schematic enlarged partial view of the flame baffle 13 at the corner position of the front end of the aluminum profile bottom guard plate 10. The flame baffle 13 can be made of steel sheet metal, and electrophoresis treatment is performed on the surface of the flame baffle 13 to ensure the corrosion resistance of the flame baffle 13. The flame baffle 13 can be fixed at the corner position of the aluminum profile bottom guard plate 10 by adopting a fixing rivet 14; the height of flame baffle 13 is a little higher than the upper surface of backplate 10 at the bottom of the aluminium alloy, and the purpose can shelter from sealing strip 12, avoids when carrying out the test of burning by fire in the battery package bottom, and the direct firing of flame leads to the problem of the quick sealed inefficacy of battery package.

In some embodiments, as shown in fig. 1, 12 and 13, the aluminum bottom protection plate 10 is provided with bolt holes 104, and the aluminum bottom protection plate 10 is detachably connected to the frame of the battery box through fixing bolts 16 inserted into the bolt holes 104. Further, backplate buckle 17 (or called buckle visor) is installed to bolt hole 104 department, and backplate buckle 17 covers and is established on fixing bolt 16, and backplate buckle 17 plays and avoids driving the vehicle in-process, and debris such as silt get into the die cavity on backplate 10 at the bottom of the aluminium alloy, cause ponding, abnormal sound and bolt corrosion scheduling problem.

In a specific implementation, the fixing bolt 16 penetrates upwards into the bolt hole 104 on the aluminum profile bottom guard plate 10 from the bottom of the aluminum profile bottom guard plate 10, and the fixing bolt 16 may be specifically a hexagon head flat washer bolt; the guard plate buckle 17 covers the bolt head of the fixing bolt 16 from bottom to top.

As shown in fig. 18 and 19, a schematic structural view of a cellular aluminum bottom cover 18 is adopted for the bottom cover main body of some embodiments of the present disclosure. Specifically, the aluminum honeycomb panel bottom guard plate 18 may include a aluminum honeycomb core 182, a first aluminum plate layer 181 and a second aluminum plate layer 183, where the first aluminum plate layer 181 and the second aluminum plate layer 183 are respectively used as a panel and a bottom plate, and are compounded with the aluminum honeycomb core 182 at high temperature and high pressure to form a composite panel; the aluminum honeycomb floor skirt 18 can provide high Z-support (i.e., vertical support) to improve the resistance of the battery pack to bottoming. Further, the upper surface of the first aluminum plate layer 181 may be provided with a protruding support structure 100, and the support structure 100 may be fixed on the upper surface of the first aluminum plate layer 181 by welding, bonding, or the like. Compare with the above-mentioned scheme that adopts backplate 10 at the bottom of the aluminium alloy, adopt backplate 18 at the bottom of the honeycomb aluminium sheet's scheme, need not set up sealing plate 11, other structures for example set up flame baffle 13, bolt fastening isotructure, all can refer to above-mentioned scheme that adopts backplate 10 at the bottom of the aluminium alloy and carry out reasonable setting, no longer describe here.

As shown in fig. 20 and 21, the bottom cover sheet 19 of the aluminum foam sandwich panel is adopted as the bottom cover sheet main body according to some embodiments of the present disclosure. Specifically, the foamed aluminum sandwich panel bottom cover sheet 19 may include a foamed aluminum sheet 192, a first aluminum sheet 191, and a second aluminum sheet 193, the foamed aluminum sheet 192 being disposed between the first aluminum sheet 191 and the second aluminum sheet 193 and being fixedly connected with the first aluminum sheet 191 and the second aluminum sheet 193 to form a sandwich panel; the foamed aluminum sandwich plate bottom guard plate 19 has the advantages of light weight and high strength. Further, the upper surface of first aluminum plate 191 may be provided with a protruding support structure 100, and support structure 100 may be fixed to the upper surface of first aluminum plate 191 by welding, bonding, or the like. Compared with the scheme of the aluminum section bottom protection plate 10, the scheme of the foamed aluminum sandwich bottom protection plate 19 does not need to be provided with the sealing plate 11, and other structures such as the structures of the flame baffle 13, the bolt fixing and the like can be reasonably arranged by referring to the scheme of the aluminum section bottom protection plate 10, and are not described again.

The embodiment of the present disclosure further provides a battery pack, which includes the battery pack bottom protection plate 1 according to any one of the above embodiments, so that the battery pack bottom protection plate 1 according to any one of the above embodiments has the beneficial effects, which are not described herein again.

In some embodiments, as shown in fig. 14 to 17, the battery pack includes a plurality of battery modules 2 sequentially disposed above the battery pack bottom protective plate 1, and a liquid cooling plate 3 is disposed between adjacent battery modules 2; be connected with connecting line 4 on the liquid cooling board 3, form the liquid cooling system through connecting line 4 connection between the polylith liquid cooling board 3, the liquid cooling system has inlet 5 and liquid outlet 6. Effectively cool down with the battery module 2 that utilizes liquid cold plate 3 to lieing in 3 both sides of liquid cold plate, avoid battery module 2's electric core high temperature to arouse thermal runaway.

Further, because the material of backplate main part and liquid cooling plate 3 is the metal material that coefficient of heat conductivity is high at the end, metal direct contact can cause the heat to run off in passing through contact interface fast, the conduction to the battery wraps the external natural environment. Therefore, in the embodiment of the present disclosure, in order to improve the thermal insulation performance of the battery pack, as shown in fig. 16 and 17, a raised support structure 100 is disposed on the upper surface of the bottom guard plate main body, and the liquid cooling plate 3 is supported by the support structure 100, that is, the bottom of the liquid cooling plate 3 is supported on the support structure 100 of the bottom guard plate 1 of the battery pack, so that compared with the bottom guard plate whose upper surface is a planar structure, by disposing the raised support structure 100, the contact area between the bottom guard plate main body and the upper liquid cooling plate 3 can be reduced, thereby improving the thermal insulation performance reduction caused by the heat interaction between the bottom guard plate main body and the upper component; further, the insulation board 7 with a low thermal conductivity coefficient (for example, a glass fiber reinforced composite insulation board) can be used at the top of the supporting structure 100 in a matched manner, so that the insulation requirement inside the battery pack is met.

In an embodiment, fig. 15 is a top view of the battery pack bottom cover plate 1 and its top thermal management system, and a cross-sectional view taken along the plane a-a is shown in fig. 16. The enlarged partial position shown in fig. 16 is shown in fig. 17. In order to improve the heat preservation performance of the battery pack, a plurality of raised ribs are arranged on the upper surface of the bottom protection plate main body, and the top of each rib is provided with a glass fiber reinforced composite material heat preservation plate 7 with a low heat conductivity coefficient. Specifically, the number of ribs can be equal to the quantity of liquid cooling plate 3, and liquid cooling plate 3 specifically can be for falling T type liquid cooling plate 3, and the bottom of liquid cooling plate 3 supports on glass fiber reinforced composite heated board 7. Specifically, the width that can set up bellied rib is less than heated board 7's width, and heated board 7's width is less than the bottom width of liquid cooling board 3 to reduce the heat because of the heat transfer loses, reach good heat preservation effect.

The embodiment of the present disclosure further provides a vehicle including the battery pack according to the above embodiment, so that the beneficial effects of the battery pack according to the above embodiment are achieved, and the details are not repeated herein.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The previous description is only for the purpose of describing particular embodiments of the present disclosure, so as to enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A battery package backplate characterized in that includes:

the bottom guard plate comprises a bottom guard plate main body, wherein a raised supporting structure is arranged on the upper surface of the bottom guard plate main body and used for supporting a part located above the bottom guard plate main body, so that the contact area between the bottom guard plate main body and the part located above the bottom guard plate main body is reduced.

2. The battery pack skirt of claim 1, wherein said support structure comprises at least one raised rib disposed on an upper surface of said skirt body.

3. The battery bottom protection plate according to claim 1, wherein the bottom protection plate body is an aluminum-profile bottom protection plate, a cavity is formed in the aluminum-profile bottom protection plate, two opposite end portions of the aluminum-profile bottom protection plate are provided with openings communicated with the cavity, and a sealing plate for sealing the openings is mounted on the aluminum-profile bottom protection plate.

4. The battery bottom protection plate according to claim 3, wherein two opposite end portions of the aluminum profile bottom protection plate are respectively provided with a groove, and the sealing plate is embedded in the grooves and is welded and fixed with the aluminum profile bottom protection plate.

5. The battery pack baseboard according to any one of claims 1 to 4, wherein a sealing strip is mounted at a periphery of an upper surface of the baseboard main body, and the baseboard main body is connected with a frame of a battery box body in a sealing manner through the sealing strip;

and a flame baffle is arranged on the periphery of the bottom guard plate main body, and the upper surface of the flame baffle is higher than that of the bottom guard plate main body, so that the periphery of the sealing strip is shielded.

6. The battery pack bottom protection plate according to any one of claims 1 to 4, wherein a bolt hole is formed in the bottom protection plate main body, the bottom protection plate main body is detachably connected with a frame of a battery box body through a fixing bolt penetrating through the bolt hole, a protection plate buckle is installed at the bolt hole, and the protection plate buckle covers the fixing bolt.

7. A battery pack comprising the battery pack bottom protective plate according to any one of claims 1 to 6.

8. The battery pack of claim 7, wherein the battery pack comprises a plurality of battery modules sequentially disposed above the battery pack bottom guard plate, and a liquid cooling plate is disposed between adjacent battery modules, and the bottom of the liquid cooling plate is supported on a support structure of the battery pack bottom guard plate.

9. The battery pack of claim 8, wherein an insulation board is disposed between the top of the support structure and the bottom of the liquid cooling board.

10. A vehicle characterized by comprising the battery pack according to any one of claims 7 to 9.

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