CN114024076A - Power battery pack lower box body of novel integrated liquid cooling system for new energy automobile - Google Patents
Power battery pack lower box body of novel integrated liquid cooling system for new energy automobile Download PDFInfo
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- CN114024076A CN114024076A CN202111289522.4A CN202111289522A CN114024076A CN 114024076 A CN114024076 A CN 114024076A CN 202111289522 A CN202111289522 A CN 202111289522A CN 114024076 A CN114024076 A CN 114024076A
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- liquid cooling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
- H01M50/24—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries from their environment, e.g. from corrosion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/691—Arrangements or processes for draining liquids from casings; Cleaning battery or cell casings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a power battery pack lower box body of a novel integrated liquid cooling system for a new energy automobile, which comprises a battery pack aluminum box body frame and a bottom protecting cover fixed on the battery pack aluminum box body frame, wherein the battery pack aluminum box body frame does not adopt a bottom plane type structure, a first step and a second step are arranged on the battery pack aluminum box body frame, a liquid cooling plate positioned above the bottom protecting cover is fixedly welded on the battery pack aluminum box body frame through the second step, and the battery pack aluminum box body frame is welded with the bottom protecting cover through the first step. The liquid cooling plate only needs to satisfy the welding strength requirement with frame segmentation friction stir welding in this scheme, and this level of welding of liquid cooling plate and frame does not have sealed requirement, and the bottom protection adopts at the bottom of high strength punching press aluminium sheet material protecting cover and frame to carry out the whole welding seam sealing performance of friction stir welding good, and middle part horizontal longeron welding via hole pierces through cold drawing and end protecting cover and carries out friction stir welding, can promote the qualification rate of product to more than 95%.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a lower power battery pack box body of a novel integrated liquid cooling system for a new energy automobile.
Background
With the occurrence of problems such as global environment deterioration and resource reduction, various large automobile factories shift the line of sight to new energy automobiles. Various electric vehicles such as hybrid electric vehicles, pure electric vehicles, extended range electric vehicles and the like are in the endlessly. On new energy electric automobile, power battery system is key spare part. Along with the increasing demand of power battery systems and the gradual improvement of production efficiency and uniformity requirements for battery packs, the height space of the power battery systems of the current passenger cars is smaller and smaller, and in order to compress the internal design combination level of the power battery systems as much as possible and reduce the overall height, the integrated design of the lower shell and the liquid cooling plate of the power battery systems is imperative.
The integration mode of the liquid cooling plate and the lower box body of the battery pack in the industry at present mainly comprises the steps that the liquid cooling plate and an aluminum alloy box body frame adopt an FDS (spin-draw-screw riveting) process, the liquid cooling plate and the frame of the lower box body are sealed by adopting a binding surface gluing and an inner side mounting sealing strip polarity seal, and then a steel plate bottom protecting cover is mounted on the frame of the lower box body through bolts to protect the liquid cooling plate. The scheme has the problems of more product integrated processing procedures, long processing time of FDS and the installation of the bottom protecting cover, more operators, high requirements on the sealant gluing construction environment and the product surface cleanliness, about 60 percent of one-time finished product rate of FDS riveting, difficult or impossible repair of glued riveting sealing failure, and high product cost; the reliability of the product is directly influenced by the micro-leakage condition at the riveting position of the FDS rivet; the product capacity of the FDS integrated process is difficult to improve; high production line replication cost and the like.
Disclosure of Invention
Objects of the invention
In view of this, the invention aims to provide a lower power battery pack box of a novel integrated liquid cooling system for a new energy automobile, so as to achieve lower manufacturing cost and better use effect.
(II) technical scheme
In order to achieve the technical purpose, the invention provides a lower power battery pack box body of a novel integrated liquid cooling system for a new energy automobile, which comprises the following parts:
it includes battery package aluminium box frame and is fixed in the end protecting cover on the battery package aluminium box frame, battery package aluminium box frame does not adopt bottom plane formula structure, be provided with first step and second step on the battery package aluminium box frame, battery package aluminium box frame has the liquid cooling board that is located end protecting cover top through second step welded fastening, and battery package aluminium box frame through first step with end protecting cover welding, fixed mounting has the liquid cooling pipe on the battery package aluminium box frame, the liquid cooling pipe be used for being connected between liquid cooling board and the liquid cooling mechanism.
Preferably, be fixed with longeron and crossbeam on the battery package aluminium box frame, the joint has hoist and mount piece on the crossbeam, the lower extreme of hoist and mount piece runs through the crossbeam and welds with the end protecting cover.
Preferably, the bottom protecting cover is provided with a welding through hole, the bottom of the cross beam is provided with a local bulge penetrating through the liquid cooling plate and the bottom protecting cover, the liquid cooling plate and the frame of the aluminum box body are welded through a first friction stir welding seam, the hoisting part and the lower end of the local bulge and the welding through hole are welded through a second friction stir welding seam, and the bottom protecting cover, the longitudinal beam and the cross beam are welded through a third friction stir welding seam.
Preferably, the heat insulating pad used for supporting the liquid cooling plate and reducing displacement interference and temperature field influence between the liquid cooling plate and the bottom protecting cover is laid between the liquid cooling plate and the bottom protecting cover, and the heat insulating pad is made of elastic heat insulating materials.
Preferably, the frame of the battery aluminum-clad box body is made of an aluminum alloy frame extruded section.
Preferably, the liquid cooling plate is provided with a through hole and a drain hole, and the lower end of the projection point for local welding of the cross beam and the longitudinal beam penetrates through the through hole.
Preferably, the welding between the second step and the liquid cooling plate adopts first friction stir welding seam welding.
Preferably, a clamping groove is formed in the cross beam, and the lower end of the hoisting piece is clamped in the clamping groove.
Preferably, the heat conducting surface of the liquid cooling plate is not subjected to insulating coating treatment, and a pressure-resistant heat conducting soft cushion is arranged between the liquid cooling plate and the liquid cooling module.
According to the technical scheme, the method has the following beneficial effects:
(1) the liquid cooling plate and the battery pack lower box body are integrated by friction stir welding, the edge of the liquid cooling plate is moved back to the inner side of a frame of the battery pack aluminum box body, only the liquid cooling plate and the frame are required to be subjected to segmented friction stir welding, the product welding meets the strength requirement, the liquid cooling plate and the frame of the battery pack aluminum box body do not have the sealing requirement, the qualified rate of the product subjected to friction stir welding is increased to more than 95%, the problem that the product is repaired to be high in rejection rate is solved, and the product cost is greatly reduced.
(2) The plane heat conduction of liquid cooling board does not do the insulating coating and handles, adopts withstand voltage heat conduction cushion to conduct heat between module and the liquid cooling board between liquid cooling board and the module to through elasticity absorption liquid cooling board and module fit clearance deviation, the heat conduction pad has good withstand voltage and is able to bear or endure the extrusion characteristic, the liquid cooling board surface need not do extra insulating coating and has reduced product cost, adopt the heat conduction pad after, power battery system need not carry out the coating of heat conduction gel when PACK assembles. The coating of heat conduction gel needs to have special rubber coating workstation, and only has about 2 hours construction time after the rubber coating, if the product appears the unusual line condition that stops in the production process, the product after the rubber coating overtime just can't use, need clear away the glue, be not convenient for the collinear production of many varieties product. The mode product finished product that this scheme did not take insulating coating's cold plate to add the heat conduction pad is low, low in production cost, the production beat is fast, produce the line and do not have special requirement.
(3) The bottom protecting cover is formed by punching 6-series or higher-strength aluminum alloy plates, the edges of the bottom protecting cover of the aluminum alloy plates and the frame of the aluminum box body of the battery pack are fully welded by friction stir welding, and the middle part and the beam of the box body longitudinal beam under the battery pack are also welded by friction stir welding, so that the production efficiency is improved, the sealing risk is eliminated, extra sealing materials are not required, and the product processing finished product and the material cost are reduced.
(4) The elastic supporting heat insulation pad of one deck is spread between the runner plate of end protecting cover and liquid cooling board bottom, supports the liquid cooling board, reduces the displacement interference risk between liquid cooling board and the end protecting cover, reduces the influence of end protecting cover to liquid cooling board temperature field simultaneously, reduces the extra power loss when whole car heats, refrigerates, reduces whole car energy consumption and promotes whole car dynamic economy.
(5) This scheme liquid cooling board does not have sealed requirement with battery package aluminium box frame, so the fabrication hole can be opened to the liquid cooling board for power battery wraps the copper bar pencil of system PACK and fixes, and the box need not extra welded fastening support and structure, reduces the product finished product.
(6) This scheme liquid cold plate does not have sealed requirement with battery package aluminium box frame, so the liquid cold plate can open the mouth of a river in the liquid pipe below in power battery system, when the unusual water pipe condition of leaking that drops or grafting position appears, can make the coolant liquid discharge fast between bottom protecting cover and the cold plate, reduces the coolant liquid and to the soaking influence of inside electric core of power battery system, electrical apparatus component, pencil, management system etc. eliminates the safety hidden danger, reduces whole package cost of maintenance.
(7) The power battery system is connected and sealed with a lifting piece in the middle of the whole vehicle through friction stir welding, the problems that a lifting point of an FDS (fully drawn yarn) process uses a steel tightening assembly and is matched with a sealing ring to use many design materials, high cost and complex assembly are solved, and the friction stir welding process is directly adopted, so that the sealing performance is good, the production efficiency is high, and the cost is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a lower box of a power battery pack of a novel integrated liquid cooling system for a new energy automobile provided by the invention.
Fig. 2 is a schematic layout view of a hoisting part of a lower box of a power battery pack of the novel integrated liquid cooling system for the new energy automobile provided by the invention.
Fig. 3 is a schematic diagram of arrangement of liquid cooling plates of a lower box of a power battery pack of the novel integrated liquid cooling system for the new energy automobile.
Fig. 4 is a schematic diagram of the arrangement of through holes in the lower box of the power battery pack of the novel integrated liquid cooling system for the new energy automobile.
Fig. 5 is a schematic diagram of a second friction stir welding seam of the lower box of the power battery pack of the novel integrated liquid cooling system for the new energy automobile provided by the invention.
Description of the drawings: 1 battery package aluminium box frame, 101 first step, 102 second step, 2 liquid cooling boards, 21 through-holes, 22 wash port, 3 heat insulating mattress, 4 end protecting covers, 41 welding via holes, 5 liquid cooling pipes, 6 longerons, 7 crossbeams, 71 local arch, 8 hoist and mount piece, 9 first friction stir welding seam, 10 draw-in grooves, 11 second friction stir welding seam, 12 third friction stir welding seam, 13 withstand voltage heat conduction cushion.
Detailed Description
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, identical or similar reference numerals indicate identical or similar parts and features. The drawings are only schematic representations of the concepts and principles of the embodiments of the disclosure, and do not necessarily show specific dimensions or proportions of the various embodiments of the disclosure. Certain features that are part of a particular figure may be exaggerated in order to illustrate relevant details or structures of embodiments of the present disclosure.
Referring to FIGS. 1-5:
example one
The utility model provides a new energy automobile is with box under power battery package of novel integrated liquid cooling system, including battery package aluminium box frame 1 and be fixed in end protecting cover 4 on the battery package aluminium box frame 1, battery package aluminium box frame 1 does not adopt bottom plane formula structure, be provided with first step 101 and second step 102 on the battery package aluminium box frame 1, battery package aluminium box frame 1 has the liquid cooling board 2 that is located end protecting cover 4 top through first step 101 welded fastening, and battery package aluminium box frame 1 is through first step 101 and end protecting cover 4 welding, fixed mounting has liquid cooling pipe 5 on the battery package aluminium box frame 1, liquid cooling pipe 5 is used for being connected between liquid cooling board 2 and the liquid cooling mechanism. The liquid cooling mechanism is external prior art and need not be described again in this embodiment, which is known to those skilled in the art.
Further, the battery aluminum-clad box body frame 1 is made of an aluminum alloy frame extrusion section. Secondly, the bottom protecting cover 4 is made of 6 series or higher strength aluminum alloy plate through punching. Specifically, the second step 102 and the liquid cooling plate 2 are welded by a first friction stir welding seam 9.
It should be noted that friction stir welding is adopted in the integration of liquid cooling plate 2 and battery package lower box, and 2 edges of liquid cooling plate move back to the battery package aluminum box frame 1 inboard of battery package, only need with battery package aluminum box frame 1 segmentation friction stir welding, product welding satisfies the strength requirement can, liquid cooling plate 2 does not have sealed requirement with battery package aluminum box frame 1.
In addition, the heat conducting surface of the liquid cooling plate 2 is not processed by an insulating coating, and a pressure-resistant heat conducting soft cushion 13 is arranged between the liquid cooling plate 2 and the liquid cooling module.
It should be noted that the pressure-resistant heat-conducting soft pad has good voltage-resistant extrusion-resistant characteristics, an extra insulating coating is not required to be made on the surface of the liquid cooling plate 2, so that the product cost is reduced, and after the pressure-resistant heat-conducting soft pad is adopted, the power battery system does not need to be coated with heat-conducting gel during PACK assembly.
Example two
The utility model provides a new energy automobile is with box under power battery package of novel integrated liquid cooling system, its on the basis of embodiment one, is fixed with longeron 6 and crossbeam 7 on battery package aluminium box frame 1, and the joint has hoist and mount piece 8 on the crossbeam 7, and the lower extreme of hoist and mount piece 8 runs through crossbeam 7 and runs through liquid cooling board 2 simultaneously and pierces through end protecting cover 4 and the trompil edge of end protecting cover 4 and welds.
In addition, the bottom protective cover 4 is provided with a welding through hole 41, the bottom of the cross beam 7 is provided with a local bulge 71 penetrating through the liquid cooling plate 2, the liquid cooling plate 2 and the aluminum box frame 1 are welded through a first friction stir welding seam 9, the hoisting piece 8 and the lower end of the local bulge 71 are welded with the welding through hole 41 through a second friction stir welding seam 11, and the bottom protective cover 4 is welded with the longitudinal beam 6 and the cross beam 7 through a third friction stir welding seam 12.
It should be noted that the edge of the bottom protecting cover 4 and the frame 1 of the battery aluminum-clad box body are fully welded by friction stir welding, and the middle part of the bottom protecting cover and the longitudinal beam 6 and the cross beam 7 of the battery aluminum-clad box body 1 are also welded by friction stir welding, so that the production efficiency is improved, the sealing risk is eliminated, extra sealing materials are not needed, and the product processing finished product and the material cost are reduced.
Specifically, lay the heat insulating mattress 3 that is used for supporting liquid cooling board 2 and reduces displacement interference and the temperature field influence between liquid cooling board 2 and end protecting cover 4 between liquid cooling board 4, heat insulating mattress 3 is made for elastic thermal insulation material. The liquid cooling plate 2 is provided with a through hole 21 and a drain hole 22, and the lower end of the local protrusion 71 penetrates the through hole 21. The crossbeam 7 is provided with a clamping groove 10, and the lower end of the hoisting piece 8 is clamped in the clamping groove 10.
Exemplary embodiments of the proposed solution of the present disclosure have been described in detail above with reference to preferred embodiments, however, it will be understood by those skilled in the art that many variations and modifications may be made to the specific embodiments described above, and that many combinations of the various technical features and structures presented in the present disclosure may be made without departing from the concept of the present disclosure, without departing from the scope of the present disclosure, which is defined by the appended claims.
Claims (9)
1. A power battery pack lower box body of a novel integrated liquid cooling system for a new energy automobile comprises a battery pack aluminum box body frame (1) and a bottom protecting cover (4) fixed on the battery pack aluminum box body frame (1), it is characterized in that the battery aluminum-coated box body frame (1) does not adopt a bottom plane type structure, a first step (101) and a second step (102) are arranged on the frame (1) of the battery aluminum-coated box body, the battery aluminum-clad box body frame (1) is fixedly welded with a liquid cooling plate (2) positioned above the bottom protective cover (4) through a second step (102), and the battery aluminum-clad box body frame (1) is welded with the bottom protecting cover (4) through a first step (101), the battery aluminum-clad box is characterized in that a liquid cooling pipe (5) is fixedly mounted on the frame (1) of the battery aluminum-clad box, and the liquid cooling pipe (5) is used for connecting the liquid cooling plate (2) with the liquid cooling mechanism.
2. The power battery pack lower box body of the novel integrated liquid cooling system for the new energy automobile is characterized in that a longitudinal beam (6) and a transverse beam (7) are fixed on a battery pack aluminum box body frame (1), a hoisting piece (8) is clamped on the transverse beam (7), and the lower end of the hoisting piece (8) penetrates through the transverse beam (7) and simultaneously penetrates through the liquid cooling plate (2) and penetrates through the bottom protective cover (4) to be welded with the opening edge of the bottom protective cover (4).
3. The power battery pack lower box body of the novel integrated liquid cooling system for the new energy automobile is characterized in that a welding through hole (41) is formed in the bottom protective cover (4), a local protrusion (71) penetrating through the liquid cooling plate (2) and the bottom protective cover (4) is formed in the bottom of the cross beam (7), the liquid cooling plate (2) and the aluminum box body frame (1) are welded through a first friction stir welding seam (9), a hoisting piece (8) and the lower end of the local protrusion (71) are welded with the welding through hole (41) through a second friction stir welding seam (11), and the bottom protective cover (4) is welded with the longitudinal beam (6) and the cross beam (7) through a third friction stir welding seam (12).
4. The power battery pack lower box body of the novel integrated liquid cooling system for the new energy automobile is characterized in that a heat insulation pad (3) used for supporting the liquid cooling plate (2) and reducing displacement interference and temperature field influence between the liquid cooling plate (2) and the bottom protective cover (4) is laid between the liquid cooling plate (2) and the bottom protective cover (4), and the heat insulation pad (3) is made of elastic heat insulation materials.
5. The power battery pack lower box body of the novel integrated liquid cooling system for the new energy automobile as claimed in claim 1, wherein the battery pack aluminum box body frame (1) is made of an aluminum alloy frame extruded section.
6. The lower box body of the power battery pack of the novel integrated liquid cooling system for the new energy automobile is characterized in that a through hole (21) and a drain hole (22) are formed in the liquid cooling plate (2), and the lower end of the local bulge (71) penetrates through the through hole (21).
7. The power battery pack lower box body of the novel integrated liquid cooling system for the new energy automobile is characterized in that the second step (102) and the liquid cooling plate (2) are welded through a first friction stir welding seam (9).
8. The power battery pack lower box body of the novel integrated liquid cooling system for the new energy automobile is characterized in that a clamping groove (10) is formed in the cross beam (7), and the lower end of the hoisting piece (8) is clamped in the clamping groove (10).
9. The power battery lower case body of the novel integrated liquid cooling system for the new energy automobile as claimed in claim 2, wherein the heat conducting surface of the liquid cooling plate (2) is not subjected to insulation coating treatment, and a pressure-resistant heat conducting soft cushion (13) is arranged between the liquid cooling plate (2) and the liquid cooling module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111289522.4A CN114024076A (en) | 2021-11-02 | 2021-11-02 | Power battery pack lower box body of novel integrated liquid cooling system for new energy automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111289522.4A CN114024076A (en) | 2021-11-02 | 2021-11-02 | Power battery pack lower box body of novel integrated liquid cooling system for new energy automobile |
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| CN114024076A true CN114024076A (en) | 2022-02-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114792864A (en) * | 2022-05-31 | 2022-07-26 | 东风汽车集团股份有限公司 | Lower box structure of battery pack |
| CN114865187A (en) * | 2022-05-31 | 2022-08-05 | 东风汽车集团股份有限公司 | Battery edge covering beam |
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| CN210866302U (en) * | 2019-11-29 | 2020-06-26 | 昆山宝创新能源科技有限公司 | Liquid cooling power battery box body assembly |
| CN211556079U (en) * | 2020-03-26 | 2020-09-22 | 孚能科技(赣州)股份有限公司 | Crossbeam, battery system case and electric automobile |
| CN112038525A (en) * | 2020-09-04 | 2020-12-04 | 东风汽车集团有限公司 | Anti-extrusion battery lower box body and preparation method thereof |
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