CN113363623A

CN113363623A - Battery integrated form automobile body chassis and electric automobile

Info

Publication number: CN113363623A
Application number: CN202110759213.2A
Authority: CN
Inventors: 陈建国; 王颖; 彭月猛; 陈保国
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-09-07

Abstract

The invention provides a battery integrated type automobile body chassis and an electric automobile, which comprise an automobile body, a module, a heat preservation component and a bottom plate, wherein a hollow area is arranged in the automobile body and is used for being integrated into an integral structure after being connected with the module in a sealing mode, the bottom of the automobile body is connected with the bottom plate in a sealing mode, and the heat preservation component is arranged above the bottom plate. The battery integrated type vehicle body chassis and the electric vehicle reduce the number of vehicle bodies and battery parts in a new energy vehicle, reduce the weight proportion of the vehicle bodies and batteries, reduce the cost of the whole vehicle, have maintainability and after-sale feasibility and have feasibility of realizing the process of the whole vehicle.

Description

Battery integrated form automobile body chassis and electric automobile

Technical Field

The invention belongs to the field of new energy automobiles, and particularly relates to a battery integrated automobile body chassis and an electric automobile.

Background

In recent years, new energy automobiles enter a vigorous development era, the sales volume is gradually increased, the competition with the traditional fuel oil automobiles is more and more intense, the requirements on the cost of the new energy automobiles are lower and higher, the endurance requirement is higher and higher, the lightweight level of the whole automobile is required to be continuously improved, the battery system occupies about 30 percent of the weight of the whole automobile, and the cost accounts for more than 20 percent. In the industry, a series of lightweight and descending schemes are proposed for batteries, and schemes such as 355 standard modules, 590 standard modules, CTP and the like are successively proposed; however, the above solutions are basically that the battery system and the entire vehicle are independent of each other, and both have partial functional structures overlapped.

Disclosure of Invention

In view of this, the invention aims to provide a battery integrated type vehicle body chassis to solve the problems that a battery system and a whole vehicle in a new energy vehicle are mutually independent, the light weight level is relatively low, and the cost is high.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides a battery integrated form automobile body chassis, includes automobile body, module, heat preservation part and bottom plate, and the automobile body is inside to be equipped with the fretwork region, and the fretwork region is used for integrating into an organic whole structure after being connected with module sealing, automobile body bottom and bottom plate sealing connection, and the bottom plate top is equipped with the heat preservation part.

Further, the vehicle body comprises a transverse beam and fixed mounting points, a hollow area is arranged in the middle of the transverse beam, the front end and the rear end are respectively arranged on the two sides of the transverse beam, and the fixed mounting points are uniformly distributed on the vehicle bottom side of the transverse beam; the front end and the rear end are both provided with inserting parts for installing a communication connector, a high-voltage connector and a water-cooling interface.

Furthermore, a first sealing part is arranged between the hollow part and the module, and a second sealing part is attached to the joint of the bottom plate and the chassis of the automobile body.

Furthermore, a plurality of weight reduction structures are arranged on the module.

Furthermore, the transverse and longitudinal beams of the vehicle body are of a T-shaped or L-shaped structure, and the number of the transverse and longitudinal beams is increased or decreased according to the size of the module and the strength requirement of the vehicle body.

Further, the module includes curb plate, heat insulating sheet, electric core unit, water-cooling board, busbar, sets up a plurality of electric core units between two curb plates and forms the electric core group, all is equipped with the heat insulating sheet between two adjacent electric core units, between electric core unit and the curb plate, and the different electrodes of two adjacent electric core units use the busbar to establish ties, and water-cooling board is installed to electric core group bottom.

Furthermore, the electric core group is connected with the water cooling plate through a heat conducting adhesive structure.

Furthermore, be equipped with spacing piece between electric core group and the water-cooling board, spacing piece is used for limiting the clearance between electric core group and the water-cooling board, controls the thickness of heat-conducting glue structure.

Further, the electricity core unit includes U type shell and the first output row subassembly of inside setting, the second output row subassembly, the spacer, electric core, the sampling subassembly, No. two end covers, No. four end covers and glue, be equipped with the spacer between two adjacent electric cores, the anodal ear of adjacent electric core piles up the back with anodal ear homonymy and forms electric core stack group, the one end and the first output row subassembly rigid coupling of electric core stack group, the other end and second output row subassembly rigid coupling, first output row subassembly is pegged graft with No. two end covers, the second output row subassembly is pegged graft with No. four end covers, every electric core bottom is through sampling subassembly signal connection to external BMS, be equipped with glue between electric core and the U type shell.

Compared with the prior art, the battery integrated type vehicle body chassis has the following advantages:

(1) the battery integrated type vehicle body chassis is light in weight and high in level, and reduces the number of parts, so that the production procedures are reduced, and the cost is greatly reduced.

(2) The battery integrated type vehicle body chassis provided by the invention is provided with the module which can directionally control thermal runaway and thermal spread, so that the thermal runaway can be controlled, and the thermal management is integrated.

(3) According to the battery integrated type vehicle body chassis, batteries are flexibly grouped, the compatibility is increased, the batteries of the whole vehicle can be maintained, and the problem that the whole vehicle is difficult to operate due to the batteries is solved.

(4) The battery integrated type vehicle body chassis greatly saves space, improves the space utilization rate, and greatly enhances the connection strength between the battery unit and the vehicle body, and the battery unit and the module have structural strength.

(5) The battery integrated type vehicle body chassis reduces the number of vehicle bodies and battery parts in new energy vehicles, reduces the weight proportion of the vehicle bodies and batteries, reduces the cost of the whole vehicle, has the feasibility of maintainability and after-sale, and has the feasibility of realizing the process of the whole vehicle.

The invention also aims to provide an electric automobile to reduce the weight and the cost of the whole automobile.

an electric vehicle, characterized in that: the vehicle body chassis comprises the battery integrated type vehicle body chassis and a vehicle body arranged on the upper part of the battery integrated type vehicle body chassis.

Compared with the prior art, the electric automobile has the following beneficial effects:

(1) according to the electric automobile, the automobile body replaces part of structural members of the battery system, part of parts of the automobile body is replaced by the part of structural members of the battery, the overlapping area of the whole automobile is greatly reduced, and the weight cost is greatly reduced.

(2) According to the electric automobile, the Z-item space occupation of the whole automobile is reduced, the man-machine and ground clearance is favorably improved, the user experience is increased, and the bottom support of the whole automobile is reduced.

(3) The electric automobile provided by the invention has the advantages that the light weight is horizontally improved, the whole automobile servicing quality is reduced, and the endurance is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is an exploded view of a battery integrated body chassis according to an embodiment of the present invention;

FIG. 2 is a schematic view of an underbody of a vehicle body chassis according to an embodiment of the present invention;

FIG. 3 is a schematic view of a module according to an embodiment of the present invention mounted on a vehicle body;

FIG. 4 is a schematic view of a base plate installation according to an embodiment of the present invention;

FIG. 5 is an exploded view of a module structure according to an embodiment of the present invention;

fig. 6 is an exploded view of a cell unit according to an embodiment of the present invention;

FIG. 7 is a first schematic view of a second end cap according to an embodiment of the present invention;

FIG. 8 is a second end cap according to an embodiment of the present invention;

fig. 9 is a schematic view of an end cap according to an embodiment of the present invention.

Description of reference numerals:

1-a vehicle body; 11-a cross stringer; 12-a hollowed-out area; 13-front end; 14-back end; 15-fixed mounting points; 2-a first sealing member; 3-a module; 31-side plate; 32-heat insulation sheets; 33-cell unit; 331-output row two; 332-a spacer; 333-electric core; 334-end cap No. two; 3341-card table I; 3342-nested nuts; 3343-card table IV; 3344-card table II; 3345-card table III; 3346-position limiting table II; 3347-limit table; 3348-weight reduction slots; 335-output row one; 336-end cap number one; 3361-top plate; 3362-card slot I; 3363-card slot II; 3364-weight reduction structure; 3365-base plate; 3366-card slot III; 3367-card slot IV; 3368-plug fastener; 3369-first end cover side plate; 337-U shaped shell; 338-a sampling component; 339-third end cap; 3310-four end cap; 34-a water-cooling plate; 35-a busbar; 36-a thermally conductive adhesive structure; 37-limiting piece; 38-glue; 4-a heat preservation component; 5-a second sealing member; 6-a bottom plate; 7-module fixing bolts; 8-bottom plate fixing bolts; arrow-vehicle bottom to roof direction.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The noun explains:

thermal runaway: the phenomenon that the current and the temperature are both increased and mutually promoted when the battery is charged/short-circuited/the internal pole piece is damaged and the like; this phenomenon can cause the battery to swell and even explode, catch fire, and produce a large amount of high temperature gas and liquid.

Soft package battery: the soft package battery is formed by covering a polymer shell on a liquid lithium ion battery. The structure adopts aluminum plastic film package.

And (3) pole lug: the battery is divided into positive and negative electrodes, the tabs are metal conductors leading out the positive and negative electrodes from the battery core, and the ears of the positive and negative electrodes of the battery are contact points during charging and discharging. This contact point is not the copper sheet that we see on the outside of the cell, but rather a connection inside the cell. The tabs are made of three materials, the positive electrode of the battery is made of aluminum (Al) material, the negative electrode of the battery is made of nickel (Ni) material, and the negative electrode of the battery is also made of copper nickel (Ni-Cu) material, and the tabs and the negative electrode are both formed by compounding a film and a metal belt.

FPC: a Flexible Printed Circuit (FPC) is a highly reliable and excellent Flexible Printed Circuit board made of polyimide or polyester film as a base material. The high-density light-weight LED lamp has the characteristics of high wiring density, light weight, thin thickness and good bending property.

The module: after the batteries are combined in series and parallel through the structural components, the battery pack has the function of externally exchanging electric energy, is provided with a protection circuit, and can externally output a combination of signals such as voltage, temperature and the like of the batteries.

A battery integrated type vehicle body chassis is shown in figures 1 to 9 and comprises a vehicle body 1, a first sealing part 2, a module 3, a heat preservation part 4, a second sealing part 5 and a bottom plate 6, wherein a hollow-out area 12 is arranged inside the vehicle body 1, the hollow-out area 12 is used for being connected with the module 3 in a sealing mode and then integrated into a whole, the bottom of the vehicle body 1 is connected with the bottom plate 6 in a sealing mode, and the heat preservation part 4 is arranged above the bottom plate 6.

Preferably, a first sealing member 2 is provided between the cutout 12 and the die set 3. A second sealing part 5 is attached to the joint of the bottom plate 6 and the chassis of the vehicle body 1 and is mainly used for ensuring that the bottom plate 6 is sealed with the vehicle body 1, and the bottom plate 6 is connected with the vehicle body 1 through a bottom plate fixing bolt 8. The first sealing member 2 and the second sealing member 5 may be made of rubber.

The heat preservation part 4 is pasted on the upper portion of the bottom plate 6, and the heat preservation part 4 adopts a low heat conduction heat preservation material, such as: the bottom plate 6 of the dragon vacuum heat insulation plate is formed by an aluminum plate or a steel plate in a stamping mode.

As shown in fig. 2, the vehicle body 1 is a frame structure and is integrally formed by compounding multiple materials in multiple processes such as sheet metal, stamping, rolling, extruding, gluing, riveting, welding and the like. The vehicle body 1 comprises a transverse longitudinal beam 11, a front end 13, a rear end 14 and fixed mounting points 15, a hollow area 12 is arranged in the middle of the transverse longitudinal beam 11, the front end 13 and the rear end 14 are respectively arranged on two sides of the transverse longitudinal beam, and a plurality of fixed mounting points 15 are uniformly distributed on the bottom side of the transverse longitudinal beam 11, so that the vehicle body is conveniently fixed with a bottom plate 6; the front end 13 and the rear end 14 are respectively provided with a plugging part for installing structures such as a communication connector, a high-voltage connector, a water-cooling interface and the like, so that the vehicle body 1 and other parts of the whole vehicle can conveniently communicate, exchange electric energy, exchange cooling liquid and the like, a limiting effect is achieved, and the vehicle body 1 and other parts can be conveniently assembled. The longitudinal and transverse beams 11 of the vehicle body are of a T-shaped or L-shaped structure, and the number of the longitudinal and transverse beams 11 is increased or decreased according to the size of the module 3 and the strength requirement of the vehicle body 1. The designed transverse and longitudinal beams 11 effectively ensure the strength of the vehicle body 1.

As shown in fig. 5, the module 3 includes a side plate 31, a spacer 32, a plurality of cell units 33, a water-cooling plate 34, a bus bar 35, a heat-conducting adhesive structure 36 and a limiting plate 37, wherein a plurality of cell units 33 are arranged between two side plates 31 to form a cell group, a heat-insulating plate 32 is arranged between two adjacent cell units 33 and between each cell unit 33 and the side plate 31, different electrodes of two adjacent cell units 33 are connected in series by using the bus bar 35, and the water-cooling plate 34 is arranged at the bottom of the cell group.

In one or more embodiments, the set of electrical cores is bonded to the water cooled plate 34 by a thermally conductive adhesive structure 36. In one or more embodiments, a limiting sheet 37 is disposed between the electric core assembly and the water cooling plate 34, and the limiting sheet 37 limits the gap between the electric core assembly and the water cooling plate 34 to control the thickness of the heat conductive adhesive structure 36.

The side plates 3 are of cast aluminum or aluminum profile construction. The heat insulating sheet 32 is an aerogel or mica sheet. The bus bar 35 is a serial copper bar. The water cooling plate 34 is made of aluminum profile, and the aluminum plate can be stamped and brazed, blown and the like.

As shown in fig. 3 and 4, the installation process of the module 3, the vehicle body 1 and the floor panel 6 is as follows: the bottom of the module 3 is pasted with a first sealing part 2, the bottom of the module 3 is lifted upwards from the bottom of the vehicle to be assembled with a chassis of a whole vehicle body 1, a plurality of module fixing bolts 7 are fixed on fixing mounting points 15 of a chassis transverse longitudinal beam 11, a side plate 31 of the module 3 is integrated with the vehicle body 1 after being installed, the overall structural strength of the vehicle body is enhanced, the top of the assembled module 3 is filled in a hollow area 12 formed by the vehicle transverse longitudinal beam 11 to replace a vehicle body floor in the original traditional scheme, and other high-low pressure connecting pieces are installed after the module 3 is installed and are installed upwards from the bottom of the vehicle; the heat preservation component 4 is attached to the bottom plate 6, the second sealing component 5 is prevented at the joint of the bottom plate 6 and the vehicle body 1, and the bottom plate 6 is connected with the vehicle body 1 through the bottom plate fixing bolt 8.

As shown in fig. 7, the battery cell unit 33 includes a U-shaped casing 337 and a first output row assembly, a second output row assembly, a spacer 332, a battery cell 333, a sampling assembly 338, a second end cover 334, a fourth end cover 3310 and glue 38 disposed inside the U-shaped casing 337, the spacer 332 is disposed between two adjacent battery cells 333, a positive tab of the battery cell 333 is stacked on the same side of the positive tab to form a battery cell stack, one end of the battery cell stack is fixedly connected to the first output row assembly, the other end of the battery cell stack is fixedly connected to the second output row assembly, the first output row assembly is plugged into the second end cover 334, the second output row assembly is plugged into the fourth end cover 3310, the bottom of each battery cell 333 is connected to an external BMS through a signal of the sampling assembly 338, and the glue 38 is disposed between the battery cell 333 and the U-shaped casing 337. This scheme has improved the unable atress current situation of soft-packaged electrical core, has increased the grouped mode flexibility ratio of soft-packaged electrical core, and it is uncontrollable to solve soft-packaged thermal diffusion. And the grouping is more flexible, and the standardization, the light weight and the integration are more facilitated.

The quantity of electric core increases according to parallelly connected demand, also a plurality of electric cores stack. In one or more embodiments, the number of stacked battery cells 333 is 2, the positive lugs of two battery cells 333 are stacked on the same side as the positive lugs, a spacer 332 is attached between the

battery cells

333 and 333, and the spacer 332 is made of foam or aerogel, and the foam or aerogel is used for absorbing expansion of the battery cells 333 and insulating heat. In another embodiment, the number of the cells 333 is 3, one side of the stacked cell tabs is assembled with the first output row assembly, the other side is combined with the next stacked cell, the tabs and the tabs are partially overlapped and stacked, the number of the tabs is increased according to the serial requirement, and finally, the tabs on one side of one string of cells 333 are combined with the second output row assembly and are fixedly combined by laser welding or ultrasonic welding after combination.

The first output row component comprises a first output row 335 and a first end cover 336, and the first output row 335 and the first end cover 336 are combined in any one or more of integral injection molding, fastening and fixing or direct placement in limiting; the second output row component comprises a third end cover 339 and a second output row 331, and the combination mode of the third end cover 339 and the second output row 331 is any one or more of integral injection molding, buckling fixation or direct placement in limit; the first output row 335 and the second output row 331 are both made of copper, aluminum or copper-aluminum composite materials and are used for exchanging electric energy between the unit bodies and the outside; the structure bilateral symmetry of a number one end cover 336 and a number three end cover 339, the material is PP + 30% GF, all is equipped with limit structure, mounting structure, connector buckle structure and subtracts heavy and technology structure on a number one end cover 336 and a number three end cover 339.

In one or more embodiments, as shown in fig. 9, the first end cover 336 includes a first end cover body, a top plate 3361, a weight reduction structure 3364, a bottom plate 3365, and a first end cover side plate 3369, the top plate 3361 is disposed above the first end cover body, the bottom plate 3365 is disposed below the first end cover body, the first end cover side plate 3369 is disposed on one side of the first end cover body, the top plate 3361 and the first end cover side plate 3369 are both L-shaped structures, a first clamping groove 3362 and a second clamping groove 3363 are respectively disposed on two side surfaces of the top plate 3361, a plurality of third clamping grooves 3366 are disposed on the bottom plate 3365, and a plurality of fourth clamping grooves 3367 and a plug connector clip 3368 are disposed on the first end cover side plate 3369; an end cover limiting groove is formed in each of the top plate 3361 and the bottom plate 3365.

A plurality of weight reducing structures 3364 are arranged on the first end cover body, and the weight reducing structures 3364 are positioned between the top plate 3361 and the bottom plate 3365. Preferably, the shapes and the number of the first card slot 3362, the second card slot 3363, the third card slot 3366, the fourth card slot 3367 and the plug connector buckle 3368 can be determined according to actual conditions.

The second end cap 334 and the fourth end cap 3310 are designed to protect the tabs of the first output row assembly, the second output row assembly, and the battery cell 333, support the first output row assembly and the second output row assembly, and have nuts embedded therein, so as to facilitate connection and fixation of the battery cell unit 3 during outward output. No. two end covers 334 and No. four end covers 3310 are equipped with spacing limit structure, installation buckle structure, connector buckle structure and subtract heavy structure, design a plurality of buckles, cooperate fixedly with end cover 336, No. three end cover 339 respectively.

In one or more embodiments, as shown in fig. 7 and 8, the second end cap 334 includes a second end cap body, a first stop 3341, a nesting nut 3342, a fourth stop 3343, a second stop 3344, a third stop 3345, a second stop 3346 and a first stop 3347, the second end cap body includes a left part and a right part which are integrally formed, the cross sections of the left part and the right part are both rectangular structures, the height of the left part is smaller than that of the right part, the top of the right part is provided with the first stop 3347 and the first stop 3341, the bottom is provided with the second stop 3346 and a plurality of third stops 3345, the third stop 3345 is clamped with the third stop 3366, the first stop 3341 is used for clamping the first stop 3362, and the first stop 3347 and the second stop 3346 are both used for contacting and connecting to the first end cap stop 3346; the top of left part is equipped with the screw that is used for installing nested nut 3342, and the side is equipped with a plurality of No. two ka tai 3344, and No. two ka tai 3344 is used for joint No. four draw-in groove 3367. And a plurality of weight reduction grooves 3348 are formed in the second end cover body.

The insertion process of the second end cover 334 and the first end cover 336 is as follows: insert an end cover body and an end cover curb plate 3369 with the left part between, the right part is located between roof 3361 and the bottom plate 3365, spacing platform 3347 this moment, No. two spacing platforms 3346 are connected with an end cover spacing groove contact, it is spacing to No. two end covers 334 and an end cover 336, then with a calorie of platform 3341 and a calorie of groove 3362 joint, No. three calorie of platform 3345 and No. three calorie of groove 3366 joint, No. two calorie of platform 3344 and No. four calorie of groove 3367 joint, No. four calorie of platform 3343 and No. two calorie of groove 3363 joint.

The U-shaped shell 337 is made of steel, aluminum or other high-temperature resistant materials, an insulating film is adhered inside the U-shaped shell, and an exhaust guide port is formed in the upper portion of the U-shaped shell, so that unit assembly is facilitated, and the U-shaped shell is mainly used for directional exhaust and guide of thermal diffusion of the battery cell 333.

Different parts adopt different functional glues and are designed according to external conditions; the glue is designed in a layered mode, the large surface of the battery cell 333 is coated with low-heat-conduction glue or high-temperature carbonizable glue, and structural bonding of the glue is increased according to requirements; the unit heat exchange window is positioned on the upper or bottom surface of the battery and can be selected according to the external heat exchange mode.

The sampling assembly 338 is a wire harness or an FPC, the sampling assembly 338 is used for voltage and temperature sampling, a wire harness or FPC sampling terminal is designed by using a nickel sheet or an aluminum sheet and is connected by using laser welding or ultrasonic welding, and the number of voltage and temperature can be increased or decreased according to different requirements; the pencil or FPC arrange in all electric cores 333 bottoms (thickness sides), use the double faced adhesive tape fixed, the pencil or FPC other end are connected with external BMS through the connector, carry out the data interchange of sampling through the electric current, the connector cooperates fixedly with an end cover or No. three end cover design fast plug structures.

An electric automobile comprises the battery-integrated automobile body chassis and an automobile body arranged on the upper part of the battery-integrated automobile body chassis.

According to the electric automobile, the automobile body replaces part of structural members of a battery system, and part of parts of the automobile body are replaced by the part of structural members of the battery, so that the overlapping area of the whole automobile is greatly reduced, and the weight cost is greatly reduced; the Z-item space occupation of the whole vehicle is reduced, the man-machine and ground clearance is favorably improved, the user experience is increased, and the bottom support of the whole vehicle is reduced; lightweight horizontal lifting, whole vehicle service quality reduction, continuation of the journey promotion.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A battery integrated form automobile body chassis which characterized in that: including automobile body, module, heat preservation part and bottom plate, the automobile body is inside to be equipped with the fretwork region, and the fretwork region is used for integrating structure after being connected with module sealing, automobile body bottom and bottom plate sealing connection, and the bottom plate top is equipped with the heat preservation part.

2. A battery integrated vehicle body chassis according to claim 1, wherein: the vehicle body comprises a transverse girder and fixed mounting points, a hollow area is arranged in the middle of the transverse girder and the longitudinal girder, the front end and the rear end are respectively arranged on the two sides of the transverse girder, and the fixed mounting points are uniformly distributed on the vehicle bottom side of the transverse girder and the longitudinal girder; the front end and the rear end are both provided with inserting parts for installing a communication connector, a high-voltage connector and a water-cooling interface.

3. A battery integrated vehicle body chassis according to claim 1, wherein: a first sealing part is arranged between the hollow part and the module, and a second sealing part is attached to the joint of the bottom plate and the chassis of the automobile body.

4. A battery integrated vehicle body chassis according to claim 1, wherein: the module is provided with a plurality of weight reducing structures.

5. A battery-integrated vehicle body chassis according to claim 2, wherein: the transverse and longitudinal beams of the automobile body are of a T-shaped or L-shaped structure, and the number of the transverse and longitudinal beams is increased or decreased according to the size of the module and the strength requirement of the automobile body.

6. A battery integrated vehicle body chassis according to claim 1, wherein: the module includes curb plate, heat insulating sheet, electric core unit, water-cooling board, busbar, sets up a plurality of electric core units between two curb plates and forms electric core group, all is equipped with the heat insulating sheet between two adjacent electric core units, between electric core unit and the curb plate, and the different electrodes of two adjacent electric core units use the busbar to establish ties, and water-cooling board is installed to electric core group bottom.

7. A battery integrated vehicle body chassis according to claim 6, wherein: the electric core group is connected with the water cooling plate through a heat conducting glue structure.

8. A battery integrated vehicle body chassis according to claim 7, wherein: be equipped with spacing piece between electric core group and the water-cooling board, spacing piece is used for restricting the clearance between electric core group and the water-cooling board, controls the thickness of heat-conducting glue structure.

9. A battery integrated vehicle body chassis according to claim 6, wherein: the electric core unit includes U type shell and the first output row subassembly of inside setting, second output row subassembly, the spacer, electric core, the sampling subassembly, No. two end covers, No. four end covers and glue, be equipped with the spacer between two adjacent electric cores, the anodal ear and the anodal ear homonymy of adjacent electric core pile up the back and form electric core stack group, the one end and the first output row subassembly rigid coupling of electric core stack group, the other end and second output row subassembly rigid coupling, first output row subassembly is pegged graft with No. two end covers, second output row subassembly is pegged graft with No. four end covers, every electric core bottom is through sampling subassembly signal connection to external BMS, be equipped with glue between electric core and the U type shell.

10. An electric vehicle, characterized in that: comprising a battery-integrated vehicle body chassis according to any one of claims 1 to 9, and a vehicle body disposed on an upper portion of the battery-integrated vehicle body chassis.