CN221080209U - Battery box, battery assembly and car - Google Patents

Abstract

The utility model relates to the technical field of vehicles and provides a battery box, a battery assembly and an automobile, wherein the battery box comprises a box body and an end cover, the box body is of a shell structure with a hollow interior and an opening at one end, a rubber groove structure is arranged on the inner bottom wall of the box body, heat-conducting rubber is filled in the rubber groove structure, the interior of the shell structure is used for installing a battery module, the heat-conducting rubber and the inner bottom wall of the box body are respectively and tightly attached to the battery module, and the end cover is arranged at the opening of the box body; according to the utility model, the bonding compactness of the battery module and the inner bottom wall of the box body is increased through the heat-conducting glue in the glue groove structure, so that the heat-conducting efficiency of the box body to the battery module is improved, and at the moment, the heat-radiating and cooling effects on the battery module are correspondingly improved through the fan or the water-cooling plate, so that the service life and the stability of the battery module are correspondingly prolonged. The end cover can be covered at the opening of the box body so as to encapsulate the battery module in the box body and realize the safety protection of the battery module.

Description

Battery box, battery assembly and car

Technical Field

The utility model relates to the technical field of vehicles, in particular to a battery box, a battery assembly and an automobile.

Background

The battery box is mainly used for packaging the battery module, wherein the battery box mainly comprises a shell and a battery box, the battery module is arranged in the battery box so as to position the battery module through the battery box, and the battery box can be arranged in the shell through a bolt fastener; the heat generated by the operation of the battery module is transferred to the shell through the battery box, and the battery module can be cooled by the fan or a water cooling plate connected with the shell.

But because battery module adopts bolt fastener fixed mounting in the casing through the battery case, in other words, the interval has the battery case between battery module and the casing to and there is the clearance because of bolt fastener between battery case and the casing, so that the laminating compactness of battery module and battery case is relatively poor, and the heat conduction efficiency of corresponding reduction battery case, and then influence battery module's cooling effect and life and stability.

Disclosure of utility model

The utility model solves the problem of how to increase the bonding compactness of the battery module and the battery box so as to improve the heat conduction cooling effect on the battery module.

In order to solve the problems, the utility model provides a battery box, which comprises a box body and an end cover, wherein the box body is of a shell structure with a hollow inside and an open end, a rubber groove structure is arranged on the inner bottom wall of the box body, heat-conducting rubber is filled in the rubber groove structure, the inside of the shell structure is used for installing a battery module, the heat-conducting rubber and the inner bottom wall of the box body are respectively and tightly attached to the battery module, and the end cover is arranged at the opening of the box body.

Optionally, the glue groove structures are distributed in a grid shape, and the area of an area surrounded by the periphery of the glue groove structures is matched with the area of the battery module.

Optionally, the battery box further includes a first reinforcing rib, the top of the glue groove structure is a mounting area of the battery module, a plurality of first reinforcing ribs are arranged at intervals between the mounting area and the inner wall of the box body, and the first reinforcing ribs are respectively connected with the inner side wall and the inner bottom wall of the box body.

Optionally, the battery box further includes a second reinforcing rib, a plurality of second reinforcing ribs are arranged at intervals along the extending direction of the box body, and two ends of the second reinforcing ribs are respectively connected with two side walls of the box body along the extending direction of the box body.

Optionally, the box includes bottom plate and curb plate, the bottom plate with a plurality of the curb plate encloses into the shell structure, just the bottom plate with the curb plate is integrated into one piece structure.

Optionally, the battery box further comprises a water cooling plate, wherein the water cooling plate is arranged below the box body, and the water cooling plate is connected with the bottom of the box body through a welding bead formed in a friction stir welding mode.

Optionally, the battery box further comprises a connecting seat, a plurality of connecting seats are arranged on the outer side of the box body at intervals, and the connecting seats are connected with the bottom wall and/or the side wall of the box body.

Optionally, the battery box further comprises a sealing structure, a first annular groove is formed in the top of the box body, and the sealing structure is arranged in the first annular groove and is used for sealing the joint of the box body and the end cover.

And/or the battery box further comprises structural adhesive, a second annular groove is further formed in the top of the box body, the second annular groove is located on the outer side of the first annular groove, and the structural adhesive is arranged in the second annular groove.

Compared with the prior art, the heat-conducting glue can be filled in the glue groove structure on the inner bottom wall of the box body, the battery module is arranged in the shell structure from one end of the opening of the box body, so that the heat-conducting glue in the glue groove structure and the inner bottom wall of the box body are respectively in close contact with the outer bottom wall of the battery module, the battery module is fixedly arranged in the box body through the heat-conducting glue, a part of heat generated by the operation of the battery module is transferred to the box body through the heat-conducting glue, the other part of heat is directly transferred to the box body, in other words, the bonding tightness of the battery module and the inner bottom wall of the box body is increased through the heat-conducting glue in the glue groove structure, the heat-conducting efficiency of the box body to the battery module is improved, and at the moment, the heat-radiating and cooling effects of the battery module can be correspondingly improved through the fan or the water-cooling plate, and the service life and stability of the battery module are correspondingly prolonged. In addition, can cover the opening part of locating the box through the end cover to with the battery module encapsulation in the box, with the safety protection to the battery module realization.

The utility model also provides a battery assembly, which comprises a battery module and the battery box.

Therefore, since the battery assembly comprises the battery box, the battery assembly at least has all technical effects of the battery box, and the details are not repeated here.

The utility model also provides an automobile which is characterized by comprising the battery assembly or the battery box.

Therefore, since the automobile comprises the battery assembly or the battery box, the automobile has at least all technical effects of the battery assembly or the battery box, and the description is omitted herein.

Drawings

FIG. 1 is a schematic view of an exploded view of a battery assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a battery assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a battery assembly according to an embodiment of the present utility model;

fig. 4 is a schematic view of a partial structure of a battery box according to an embodiment of the present utility model;

Fig. 5 is a schematic diagram showing a cross-sectional structure of a battery assembly according to an embodiment of the utility model.

Reference numerals illustrate:

1-a battery module; 21-a box body; 211-a glue groove structure; 212-a second annular groove; 22-end caps; 23-a first reinforcing rib; 24-second reinforcing ribs; 25-connecting seats; 26-water cooling plates; 261-water inlet; 262-water outlet; 263-flow channel; 27-a sealing structure; 28-structural adhesive; 29-welding bead; 30-first positioning structure.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the coordinate system XYZ provided herein, the positive direction of the X axis represents the right direction, the negative direction of the X axis represents the left direction, the positive direction of the Y axis represents the front direction, the negative direction of the Y axis represents the rear direction, the positive direction of the Z axis represents the upper direction, and the negative direction of the Z axis represents the lower direction. Also, it is noted that the terms "first," "second," and the like in the description and claims of the present utility model and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or implementation of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.

In order to solve the above technical problems, as shown in fig. 1 and fig. 4, the embodiment of the utility model provides a battery box, which comprises a box body 21 and an end cover 22, wherein the box body 21 is a shell structure with a hollow interior and an open end, a glue groove structure 211 is arranged on the inner bottom wall of the box body 21, heat-conducting glue is filled in the glue groove structure 211, the battery module 1 is installed in the shell structure, the heat-conducting glue and the inner bottom wall of the box body 21 are respectively and tightly attached to the battery module 1, and the end cover 22 is arranged at the opening of the box body 21.

It should be noted that, the hollow inside of the housing structure is used for installing the battery module 1, and the inner bottom wall of the case 21 may be provided with a glue groove structure 211, so that the glue groove structure 211 is filled with heat-conducting glue, and when the battery module 1 is installed in the case 21, the battery module 1 is fixed by the heat-conducting glue. After the battery module 1 is mounted in the case 21, the cover may be disposed at the opening of the case 21 to encapsulate the battery module 1 in the case 21.

According to the embodiment, the heat-conducting glue can be filled in the glue groove structure 211 on the inner bottom wall of the box body 21, the battery module 1 is installed in the shell structure from one end of the opening of the box body 21, so that the heat-conducting glue in the glue groove structure 211 and the inner bottom wall of the box body 21 are respectively in close contact with the outer bottom wall of the battery module 1, the battery module 1 is fixedly installed in the box body 21 through the heat-conducting glue, a part of heat generated by the operation of the battery module 1 is transferred to the box body 21 through the heat-conducting glue, and the other part of heat is directly transferred to the box body 21, in other words, the bonding tightness between the battery module 1 and the inner bottom wall of the box body 21 is increased through the heat-conducting glue in the glue groove structure 211, so that the heat-conducting efficiency of the box body 21 to the battery module 1 is improved, and at the moment, the heat-radiating and cooling effects of the battery module 1 can be correspondingly improved through the fan or the water-cooling plate 26 are correspondingly improved, and the service life and stability of the battery module 1 are correspondingly prolonged. In addition, the end cover 22 can be covered at the opening of the case 21, so as to encapsulate the battery module 1 in the case 21, thereby realizing the safety protection of the battery module 1.

In one embodiment of the present utility model, the glue groove structures 211 are distributed in a grid shape, and the area of the area surrounded by the periphery of the glue groove structures 211 is matched with the area of the battery module 1.

It should be noted that, the area of the area surrounded by the periphery of the glue groove structure 211 is matched with the area of the battery module 1, so that when the battery module 1 is mounted in the box 21, the heat-conducting glue in the area surrounded by the periphery of the glue groove structure 211 can be completely contacted with the bottom wall of the battery module 1, and accordingly the connection area with the battery module 1 is increased, so as to improve the mounting stability of the battery module 1. In addition, the case 21 may be made of an aluminum alloy material.

The glue groove structure 211 may be in a manner such as that the glue groove structure 211 in fig. 4 is in a grid-like distribution, and the lines forming the grid in the glue groove structure 211 are glue grooves, where the glue groove structure 211 includes a plurality of grid units, and each grid unit is an inner bottom wall of the box 21, and each grid unit may be an isosceles triangle, or may be other shapes, which is not specifically limited herein.

At this time, the bottom surface of the groove structure is lower than the inner bottom wall of the case 21, when the heat conducting glue is filled in the groove structure, the top surface of the heat conducting glue can be flush with the inner bottom wall of the case 21, or the heat conducting glue is slightly higher than the inner bottom wall of the case 21, when the battery module 1 is mounted in the case 21, the bottom wall of the battery module 1 is highly attached to the inner bottom wall of the case 21 and the heat conducting glue, so that the heat conducting efficiency of the battery module 1 is improved, as shown in fig. 4.

In the following two related arts, the battery module 1 is mounted in the case 21 by means of a heat conductive adhesive, the first type: for example, a plurality of heat conducting adhesive tapes are arranged at intervals on the inner bottom wall of the box body 21, when the battery module 1 is installed in the box body 21, one part of heat generated by the operation of the battery module 1 is transferred to the bottom of the box body 21 through the heat conducting adhesive, and the other part is transferred to the bottom of the box body 21 through air; and because the heat conductivity coefficient of air is 0.024W/mk, the heat conductivity coefficient of the heat-conducting glue is 0.8-2.5W/mk, wherein the heat conductivity coefficient is also called heat conductivity, the heat conductivity coefficient refers to a material with the thickness of 1m under the condition of stable heat transfer, the temperature difference of the surfaces of two sides is 1 degree (K and DEG C), and the heat transferred through the area of 1 square meter in 1 second is expressed in W/m.

Second kind: the inner bottom wall of the box body 21 is fully paved with heat conducting glue, the battery module 1 is mounted on the heat conducting glue, at the moment, the bottom of the battery module 1 is fully in close contact with the heat conducting glue, and heat generated by the operation of the battery module 1 is fully transferred to the bottom of the box body 21 through the heat conducting glue; the heat conducting efficiency of the heat conducting glue is 0.8-2.5W/mk.

Therefore, in contrast to the heat conduction efficiency of the battery module 1 in the two related arts, in the present embodiment, the case 21 may be made of an aluminum alloy material, when the battery module 1 is mounted on the inner bottom wall of the case 21, the heat-conducting glue in the glue groove structure 211 and the inner bottom wall of the case 21 are tightly adhered to the bottom of the battery module 1, so that a part of the heat generated by the operation of the battery module 1 is transferred to the case 21 through the heat-conducting glue, and another part is directly transferred to the case 21; because the heat conductivity coefficient of the aluminum alloy material is 120-220W/mk, the adhesive groove structure 211 is adopted in the embodiment, the fitting degree of the battery module 1 and the box body 21 is improved, and because the heat conductivity coefficient of the aluminum alloy is thousands times of that of static air, the heat conduction efficiency of the battery box for the battery module 1 is higher, and the heat dissipation and cooling effects for the battery module 1 are correspondingly improved.

In an embodiment of the present utility model, as shown in fig. 3 and 4, the battery box further includes a first reinforcing rib 23, an installation area of the battery module 1 is above the glue groove structure 211, a plurality of first reinforcing ribs 23 are disposed between the installation area and an inner wall of the box 21 at intervals, and the first reinforcing ribs 23 are respectively connected with an inner side wall and an inner bottom wall of the box 21.

It should be noted that, because the heat-conducting glue is filled in the glue groove structure 211, when the battery module 1 is installed in the box 21, the upper part of the glue groove structure 211 is an installation area for fixing the battery module 1 through the heat-conducting glue, the first reinforcing ribs 23 are arranged between the installation area and the inner wall of the box 21 at intervals, and the first reinforcing ribs 23 are distributed on the inner bottom wall and the inner side wall of the box 21 to be connected, so that when the battery box receives the extrusion force of the lateral collision, the first reinforcing ribs 23 can reduce the stress concentration degree of the battery box by guiding the way of the collision load transmission and the dispersion stress of the external force, so that the battery box is more stable when the battery box receives the external force collision load, the impact resistance of the battery box is improved, and the safety and the stability of the battery box are ensured.

Specifically, the case 21 and the first reinforcing ribs 23 may be an integrally formed structure, thereby improving the lateral mechanical strength of the entire battery case; because the first reinforcing rib 23 is respectively connected with the inner side wall and the inner bottom wall of the box body 21, the first reinforcing rib 23 can be a triangular reinforcing rib, a fan-shaped reinforcing rib and the like, and an avoidance interval is reserved between the first reinforcing rib 23 and the battery module 1, so that when the whole battery box receives impact force along the extending direction perpendicular to the box body 21, the avoidance interval can be used as a deformation space of the side wall of the box body 21, the side wall of the box body 21 is prevented from directly transmitting the impact force to the battery module 1, and safety protection of the battery module 1 is realized. The present invention is not particularly limited as long as the structure of the reinforcing ribs capable of simultaneously connecting the inner bottom wall and the inner side wall of the case 21 is applicable to the present invention.

Wherein, a plurality of first strengthening ribs 23 set up and form first reinforcement subassembly along the extending direction interval of box 21, and two first reinforcement subassemblies set up respectively in the installation district along the opposite both sides of the extending direction of perpendicular to box 21, when box 21 receives the impact force along the extending direction (horizontal) of box 21, box 21 accessible two first reinforcement subassemblies improves the lateral shock resistance of the extending direction (length direction) of box 21.

The extending direction of the case 21 corresponds to the X-axis direction of the coordinate system in fig. 4, and the extending direction of the case 21 may be the length direction of the case 21 or the transverse direction of the case 21; the extending direction perpendicular to the case 21 corresponds to the Y-axis direction of the coordinate system in fig. 4, and the extending direction perpendicular to the case 21 may be the width direction of the case 21 or the longitudinal direction of the case 21.

In one embodiment of the present utility model, as shown in fig. 3 and 4, the battery case further includes a second reinforcing rib 24, a plurality of second reinforcing ribs 24 are disposed at intervals along the extending direction of the case 21, and two ends of the second reinforcing rib 24 are respectively connected to two sidewalls of the case 21 along the extending direction thereof.

It should be noted that, when the case 21 receives the longitudinal collision force of the case 21, the case 21 may improve the longitudinal impact resistance of the case 21 by the second reinforcing ribs 24 by connecting the two ends of the second reinforcing ribs 24 with the two sidewalls of the case 21 along the extending direction thereof, respectively; wherein, when the case 21 receives a collision force perpendicular to the extending direction (longitudinal direction) of the case 21, the impact resistance range perpendicular to the extending direction (width direction) of the case 21 can be improved by a plurality of second reinforcing ribs 24 arranged at intervals along the extending direction of the case 21.

Specifically, by the plurality of first reinforcing ribs 23 and the plurality of second reinforcing ribs 24, the impact resistance and range of the case 21 can be improved, and accordingly the safety and stability of the battery case can be improved, regardless of the direction of collision impact to which the case 21 is subjected.

In one embodiment of the present utility model, the case 21 includes a bottom plate and side plates, the bottom plate and the side plates enclose the housing structure, and the bottom plate and the side plates are integrally formed.

It should be noted that, in the related art, the case 21 of the battery case includes a plurality of plates, and the plurality of plates are enclosed into the case 21 by way of splicing, and the plurality of plates are assembled into the case 21 by way of splicing and welding or bolting, so that the mechanical strength of the case 21 is weaker, and when the case 21 is subjected to the collision extrusion force, the case 21 is easily extruded and deformed to hurt the battery module 1; therefore, in the present embodiment, the bottom plate and the plurality of side plates enclose a housing structure, and the bottom plate and the side plates may be integrally formed, so as to effectively improve the mechanical strength of the case 21, and accordingly improve the anti-extrusion capability of the case.

Specifically, the case 21 may be integrally formed by a die casting process, or by an extrusion process.

In one embodiment of the present utility model, as shown in fig. 1 and 5, the battery case further includes a water cooling plate 26, the water cooling plate 26 is disposed below the case 21, and the water cooling plate 26 is connected to the bottom of the case 21 by a weld bead 29 formed by friction stir welding.

It should be noted that, set up in the below of box 21 through water-cooling plate 26, and be connected with the bottom of box 21, thereby when battery module 1 installs in box 21, because the interior heat conduction glue of gluey inslot structure 211 and the interior bottom wall of box 21 respectively with battery module 1 in close contact with, thereby effectively improve battery module 1 and the laminating degree of box 21, because water-cooling plate 26 is connected with the bottom of box 21, thereby be equivalent to improving battery module 1 and water-cooling plate 26's laminating degree, and then through mentioning the heat conduction efficiency of box 21 to battery module 1, with the cooling effect of water-cooling plate 26 to battery module 1's heat dissipation.

The water cooling plate 26 is connected with the bottom of the box 21 through a weld bead 29 formed by friction stir welding, so that the welding stability of the water cooling plate 26 and the bottom of the box 21 is effectively improved.

The friction stir welding is to utilize heat generated by friction between a welding tool rotating at a high speed and a workpiece to locally melt a welded material, and when the welding tool moves forwards along a welding interface, the plasticized welded material flows from the front part to the rear part of the welding tool under the action of the rotating friction force of the welding tool, and a compact solid-phase welding seam is formed under the extrusion of the welding tool.

Specifically, the water cooling plate 26 has a water inlet 261, a water outlet 262 and a flow channel 263, and two ends of the flow channel 263 are respectively communicated with the water inlet 261 and the water outlet 262, and an external liquid cooling unit can be used to output cooling liquid, and the cooling liquid enters the flow channel 263 from the water inlet 261 and is discharged from the water outlet 262, so that the cooling liquid is continuously circulated in the water cooling plate 26 to take away heat generated by the operation of the battery module 1 and conducted to the water cooling plate 26 through the box 21, thereby realizing heat dissipation and temperature reduction of the battery module 1.

When the water cooling plate 26 is connected to the bottom of the tank 21 by friction stir welding, a certain interval is reserved between the weld bead 29 and the flow channel 263 of the water cooling plate 26, so as to prevent the weld bead 29 from damaging the flow channel 263 of the water cooling plate 26.

In one embodiment of the present utility model, as shown in fig. 2, 4 and 5, the battery box further includes a connection seat 25, a plurality of connection seats 25 are disposed at intervals on the outer side of the box 21, and the connection seats 25 are connected with the bottom wall and/or the side wall of the box 21.

It should be noted that, by disposing the plurality of connection seats 25 at intervals outside the case 21, the connection seats 25 do not occupy the internal space of the case 21; the connecting seat 25 can be connected with the outer side wall and/or the outer bottom wall of the box 21, so that when the box 21 is mounted on the body of an automobile, the connecting seat 25 and the automobile body can be penetrated through by fasteners, so that the box 21 is stably fixed on the body through the plurality of connecting seats 25, in other words, the box 21 is fixedly connected with the mounting points of the automobile body through the plurality of connecting seats 25 distributed all around, and therefore the fixed points of the automobile body in the three other directions are effective when the battery box is subjected to impact load in a certain direction, and the risk that the whole battery box falls off due to failure of the fastening points of the automobile body on a certain side in the collision process is avoided.

Specifically, the outer walls of the connecting seat 25 and the box body 21 may adopt an integrally formed structure, so that the connection stability of the connecting seat 25 and the box body 21 can be further improved, and the impact resistance of the battery box is correspondingly improved. For example, the connection seat 25 may be provided on the outer side wall of the case 21, on the outer bottom wall of the case, or on the outer side wall of the case 21, and on the outer bottom wall of the case 21.

In one embodiment of the present utility model, as shown in fig. 4, a first positioning structure 30 is provided on the case 21, and a second positioning structure matched with the first positioning structure 30 is provided on the end cover 22.

It should be noted that, through setting up first location structure 30 at the top of box 21, set up in the second location structure that first location structure 30 matches on end cover 22 to when end cover 22 and box 21 lid closes to be connected, correspond from top to bottom through first location structure 30 and second location structure, with the degree of accuracy that improves end cover 22 and box 21 once to the equipment, make end cover 22 and box 21's equipment be connected inseparabler, improve end cover 22 and box 21's equipment quality and efficiency correspondingly.

Specifically, when the first positioning structure 30 is a positioning protrusion, the second positioning protrusion is a positioning groove; when the first positioning structure 30 is a positioning groove, the second positioning protrusion is a positioning protrusion.

In one embodiment of the present utility model, as shown in fig. 1 and 3, the battery box further includes a sealing structure 27, a first annular groove is disposed at the top of the box body 21, and the sealing structure 27 is disposed in the first annular groove, and is used for sealing a connection between the box body 21 and the end cover 22.

And/or, still include structural adhesive 28, the top of box 21 still is equipped with second annular groove 212, second annular groove 212 is in the outside of first annular groove, structural adhesive 28 sets up in second annular groove 212.

It should be noted that the case 21 and the end cover 22 may be connected in three ways as follows; first kind: the box body 21 is connected with the end cover 22 through a sealing structure 27 and is fastened through a fastening piece, for example, a first annular groove is formed in the top of the box body 21 and provides a mounting position for the sealing structure 27, when the end cover 22 is mounted at the opening of the box body 21, the sealing structure 27 can play a role in sealing between the box body 21 and the end cover 22 so as to prevent external dust, water vapor and the like from entering the box body 21, and then the end cover 22 and the box body 21 can be connected through the fastening piece so as to fix the end cover 22 on the box body 21; the fastening member may be a bolt fastening member, a clip fastening member, or the like, and is not particularly limited herein.

Second kind: the box 21 is connected with the end cover 22 through the structural adhesive 28, for example, a second annular groove 212 is formed in the top of the box 21, the second annular groove 212 provides a mounting position for the structural adhesive 28, when the end cover 22 is mounted at the opening of the box 21, the structural adhesive 28 not only can play a role in connecting the box 21 with the end cover 22, but also can play a certain sealing role, and the traditional connection modes such as screwing, welding and riveting can be replaced, so that the problems of electrochemical corrosion and fatigue loosening caused by the traditional screwing are avoided. Moreover, the structural adhesive 28 has higher connection strength, better sealing performance and better shock resistance than the traditional screwing mode.

Third kind: the box 21 is connected with the end cover 22 through the sealing structure 27 and the structural adhesive 28, for example, a first annular groove and a second annular groove 212 are formed in the top of the box 21, the first annular groove provides a mounting position for the sealing structure 27, the second annular groove 212 is positioned on the outer side of the first annular groove, the second annular groove 212 provides a mounting position for the structural adhesive 28, when the end cover 22 is mounted at the opening of the box 21, the sealing structure 27 can play a sealing role between the box 21 and the end cover 22, the structural adhesive 28 can play a connecting role between the box 21 and the end cover 22, can play a certain sealing role, can replace the traditional connecting modes such as screwing, welding, riveting and the like, correspondingly reduces the connecting parts of the battery box, so that the assembly efficiency of the battery box is improved, and the problems of electrochemical corrosion and fatigue caused by the traditional unscrewing are avoided.

Specifically, the sealing structure 27 may be a sealing ring or a sealant, and when the sealing structure 27 is a sealant, the sealant may be a 3M DP-8005 acrylic sealant, which has good connectivity and chemical resistance. The structural adhesive 28 can be dupont 2090 structural adhesive, and the structural adhesive 28 has high connection strength and can replace the traditional connection modes such as screw connection, welding, riveting and the like.

Another embodiment of the present utility model provides a battery assembly including the battery module 1 and the battery case as described in the above embodiment.

The battery module 1 is mounted in the case 21 of the battery case and sealed by the end cap 22; the water cooling plate 26 is disposed below the case 21 and is fixedly connected to a bead 29 formed by friction stir welding with the bottom of the case 21, so that the temperature of the battery module 1 in the battery case can be reduced by the water cooling plate 26. The battery assembly has all technical effects of the battery box and is not described herein.

Another embodiment of the present utility model provides an automobile including the battery assembly as described in the above embodiment, or the battery box as described in the above embodiment.

It should be noted that, the automobile includes a body, and the connection seat of the battery assembly or the battery box may be mounted on the body through a bolt fastener, so as to realize the fixed mounting of the battery assembly and the battery box. The automobile has all technical effects of a battery assembly or a battery box, and are not described in detail herein.

Although the utility model is disclosed above, the scope of the utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the scope of the utility model.

Claims (10)

1. The utility model provides a battery box, its characterized in that, includes box (21) and end cover (22), box (21) are inside hollow and one end open-ended shell structure, the interior bottom wall of box (21) is equipped with gluey groove structure (211), be used for filling heat conduction glue in gluey groove structure (211), the inside of shell structure is used for installing battery module (1), heat conduction glue with the interior bottom wall of box (21) respectively with battery module (1) hugs closely the setting, end cover (22) set up in the opening part of box (21).

2. The battery box according to claim 1, wherein the glue groove structures (211) are distributed in a grid shape, and the area of an area surrounded by the periphery of the glue groove structures (211) is matched with the area of the battery module (1).

3. The battery box according to claim 1, further comprising first reinforcing ribs (23), wherein the mounting area of the battery module (1) is above the glue groove structure (211), the plurality of first reinforcing ribs (23) are arranged between the mounting area and the inner wall of the box body (21) at intervals, and the first reinforcing ribs (23) are respectively connected with the inner side wall and the inner bottom wall of the box body (21).

4. A battery box according to claim 3, further comprising a second reinforcing rib (24), wherein a plurality of the second reinforcing ribs (24) are provided at intervals along the extending direction of the box body (21), and both ends of the second reinforcing rib (24) are respectively connected with both side walls of the box body (21) along the extending direction thereof.

5. The battery box according to claim 1, wherein the box body (21) comprises a bottom plate and side plates, the bottom plate and a plurality of the side plates enclose the shell structure, and the bottom plate and the side plates are of an integrally formed structure.

6. The battery box according to claim 1, further comprising a water cooling plate (26), wherein the water cooling plate (26) is disposed below the box body (21), and the water cooling plate (26) is connected with a weld bead (29) formed at the bottom of the box body (21) by friction stir welding.

7. The battery box according to claim 1, further comprising a connection base (25), wherein a plurality of the connection bases (25) are disposed at intervals outside the box body (21), and the connection bases (25) are connected with a bottom wall and/or a side wall of the box body (21).

8. The battery box according to any one of claims 1 to 7, further comprising a sealing structure (27), wherein a first annular groove is arranged at the top of the box body (21), and the sealing structure (27) is arranged in the first annular groove and is used for sealing the connection part of the box body (21) and the end cover (22);

And/or, still include structural adhesive (28), the top of box (21) still is equipped with second annular groove (212), second annular groove (212) are in the outside of first annular groove, structural adhesive (28) set up in second annular groove (212).

9. A battery assembly, characterized by comprising a battery module (1) and a battery compartment as claimed in any one of claims 1 to 8.

10. An automobile comprising the battery assembly according to claim 9, or the battery box according to any one of claims 1 to 8.