CN115411445A - New energy automobile battery pack and manufacturing method thereof - Google Patents

New energy automobile battery pack and manufacturing method thereof Download PDF

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Publication number
CN115411445A
CN115411445A CN202211167096.1A CN202211167096A CN115411445A CN 115411445 A CN115411445 A CN 115411445A CN 202211167096 A CN202211167096 A CN 202211167096A CN 115411445 A CN115411445 A CN 115411445A
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CN
China
Prior art keywords
battery pack
frame
plate
cooling
frames
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Granted
Application number
CN202211167096.1A
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Chinese (zh)
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CN115411445B (en
Inventor
张坤
朱江勇
栾国红
顾月华
王武威
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Suzhou Dongshan Precision Manufacturing Co Ltd
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Suzhou Dongshan Precision Manufacturing Co Ltd
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Priority to CN202211167096.1A priority Critical patent/CN115411445B/en
Publication of CN115411445A publication Critical patent/CN115411445A/en
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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
    • H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
    • 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
    • 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
    • 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
    • H01M10/63—Control systems
    • H01M10/633—Control systems characterised by algorithms, flow charts, software details or the like
    • 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
    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

Abstract

The invention relates to a new energy automobile battery pack, which comprises a cover plate, a supporting bottom plate, a first frame, a second frame, a cooling partition plate and a battery pack, wherein the cover plate is arranged on the first frame; the cover plate, the support bottom plate, the first frame and the second frame are all provided with T-shaped protective structures, and the cover plate, the first frame, the second frame and the support bottom plate are fixedly connected to form a closed structure for containing functional components inside the battery pack; a plurality of inserting grooves for limiting the cooling partition plate are respectively arranged on the inner sides of the first frame and the second frame; the battery pack is characterized in that a plurality of series-connected battery packs are arranged on the supporting bottom plate and the cooling partition plate, the protection unit of the T-shaped protection structure comprises a supporting part and a protection part, and the protection part is of an arc-shaped structure. The battery pack is obtained by aluminum alloy extrusion and friction stir welding, has low cost and high technical maturity, is easy for batch production and manufacture, can realize modularized processing, manufacture and combination, can be freely combined according to actual conditions, is convenient to mount and dismount, and can realize repeated use.

Description

New energy automobile battery pack and manufacturing method thereof
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a new energy automobile battery pack and a manufacturing method thereof.
Background
With the increasing awareness of environmental protection, carbon reduction strategies are developed in various countries to protect our earth home that is getting worse. At present, new energy automobiles become an important development direction in the automobile field, and the new energy automobiles are more and more popular with the continuous development of battery technology. Along with the continuous increase of the driving mileage, the energy density of the battery and the number of the battery packs are correspondingly increased, and the battery pack is the most important and the heaviest part of the new energy automobile, and the structural form of the battery pack directly influences the service performance of the whole automobile. The battery pack assembly is light in weight, modularized, functional and higher in cost performance. Firstly, the battery pack is required to have high structural strength, so that the internal battery assembly can be effectively protected, and meanwhile, the battery pack is light in weight, and the self weight is reduced to the maximum extent; secondly, the battery pack also has a temperature regulation function, so that the internal battery is always in an optimal temperature range; meanwhile, the battery pack is required to be easy to mount and dismount, and flexible combination is realized, so that the battery pack can be quickly adapted to different application scenes; finally, the production and the manufacture are easy, the cost is low, and the economical efficiency is excellent.
The design of the battery pack of the existing new energy automobile only considers the safety factor and adopts various frame structures to protect the battery assembly; or only considering the convenience of replacement, adopting a modularized design and manufacturing idea; the internal part and the external part of the battery pack are not involved in heat dissipation, low manufacturing cost and the like. With the continuous development of new energy automobiles, the demand for the battery pack which is light, high in strength, detachable, liquid-cooled and manufactured at low cost is more and more urgent.
Disclosure of Invention
The invention aims to solve the technical problem of designing a new energy automobile battery pack which is simple in structure, good in protection performance, good in heat dissipation effect, convenient to produce, assemble and disassemble and solves the existing technical problem.
In order to solve the technical problem, the new energy automobile battery pack comprises a cover plate, a supporting bottom plate, a first frame group, a second frame group, a cooling partition plate and a battery pack; the upper surface of the cover plate is provided with a T-shaped protective structure, and the upper surface of the cover plate is provided with a high-pressure interface, a low-pressure interface, a main liquid inlet and a main liquid outlet; the lower surface of the supporting bottom plate is provided with a T-shaped protective structure, the T-shaped protective structure can prevent external force from damaging the internal battery pack during collision, and the T-shaped protective structure can realize air cooling and heat dissipation during vehicle running, so that heat of the battery pack is dissipated through the T-shaped protective structure, and the battery is ensured to work in a proper temperature range; the first frame group comprises 2 first frames, and the 2 first frames are respectively arranged on a pair of edges of the supporting bottom plate; the second frame group comprises 2 second frames, and the 2 second frames are respectively arranged on the other pair of edges of the supporting bottom plate; the T-shaped protective structures are arranged on the outer side surfaces of the first frame and the second frame, the T-shaped protective structures can prevent external force from damaging the internal battery pack during collision, air cooling and heat dissipation can be achieved during vehicle operation, heat of the battery pack is dissipated through the T-shaped protective structures, and the battery is guaranteed to work within a proper temperature range; the cover plate, the first frame group, the second frame group and the support bottom plate are fixedly connected to form a closed structure together, and the closed structure is used for accommodating functional components in the battery pack; the cooling partition plate comprises liquid cooling plates and support bars, the support bars are fixedly connected to the periphery of each liquid cooling plate, the 4 support bars surround the four sides of each liquid cooling plate and are welded with the liquid cooling plates together in a friction stir welding mode to form the cooling partition plate, one liquid cooling plate can be used, and a plurality of liquid cooling plates can be welded into a whole in a friction stir welding mode, the number of the cooling partition plates is at least 1, a branch liquid inlet and a branch liquid outlet are formed in each liquid cooling plate, each liquid cooling plate is of a hollow structure, a plurality of baffle plates are arranged in each liquid cooling plate, a temperature adjusting medium enters the liquid cooling plates from the branch liquid inlets, flows through a cooling channel under the action of the baffle plates and finally flows out from the branch liquid outlets; branch liquid inlets on the liquid cooling plates are respectively connected with a main liquid inlet on the cover plate through pipelines, and branch liquid outlets on the liquid cooling plates are respectively connected with a main liquid outlet on the cover plate through pipelines; a plurality of inserting grooves for limiting the cooling partition plate are respectively arranged on the inner sides of the first frame and the second frame; the support bottom plate and the cooling partition plate are respectively provided with a battery partition plate, and the battery partitions are used for separating and fixing the adjacent battery packs; the T-shaped protection structure comprises a plurality of protection units, each protection unit comprises a supporting portion and a protection portion, and each protection portion is of an arc-shaped structure.
Further, at least one end is equipped with the protection strip in the upper and lower both ends of second frame, the interval is provided with a plurality of first fixed strips on the protection strip terminal surface, and two side end faces adjacent with the terminal surface that sets up first fixed strip all are equipped with the second fixed strip, in the space that the protection strip inserted the adjacent protection unit of the T type protective structure of second frame through first fixed strip formed, first fixed strip is connected fixedly with the second frame, and connected mode is screw connection, the second fixed strip is connected fixedly with first frame, and connected mode is screw connection. The curved surface structure with the same radian as the T-shaped protection structure of the second frame is arranged on the end face of the first fixing strip arranged on the protection strip at intervals, corresponds to the T-shaped protection structure of the second frame, and is more attractive.
Further, the inserting groove comprises 2 aluminum materials arranged up and down, the position of the cooling partition plate is limited by the space between the 2 aluminum materials, and the cooling partition plate is respectively inserted into the inserting groove with the same height as the first frame and the second frame through the surrounding support bars and fixed.
Further, the length of the battery separator along the second frame is 1/2-1 of the length of the battery pack, preferably, the length of the battery separator along the second frame is 2/3 of the length of the battery pack, so that the fixing of the battery pack can be ensured, the weight can be reduced, the battery separator is fixed with the support bottom plate, the battery separator is fixed with the cooling separator through screws, the battery separator is an aluminum alloy plate, the thickness of the battery separator is 8-12 mm, and preferably, the thickness of the battery separator is 10mm.
Furthermore, lifting holes are processed in four corners of the cover plate, and the battery pack is transferred.
Further, the temperature of the temperature adjusting medium is 10-30 ℃. The temperature adjusting medium is fluid such as water, oil and the like, the pressure intensity is increased on the liquid medium through the external pressurizing device, the liquid medium flows into the cooling partition plate from the branch liquid inlet and flows out from the branch liquid outlet, heat generated by the battery pack in the battery pack is taken away, the battery pack cooling is realized, and the liquid medium can realize the cooling of the battery pack and also can realize the heating. The temperature adjusting medium in the pipeline can cool the battery pack in the battery pack when the external environment temperature is high, such as summer, the heat preservation of the battery pack can be realized when the external environment temperature is low, such as winter, and the temperature of the battery pack is always in the optimal working range by selecting the adjusting medium with different temperatures.
Furthermore, an auxiliary plate is arranged on at least one first frame in the first frame group, the auxiliary plate comprises an auxiliary plate body and connecting parts arranged on two sides of the auxiliary plate body, holes are formed in the auxiliary plate body, inserting strips are arranged at one ends, far away from the auxiliary plate body, of the connecting parts, the auxiliary plate is inserted into the T-shaped protective structures of the first frames through the inserting strips at two ends and is fixedly connected with the first frames, the connecting modes can be screw connection, the inserting strips can also be tightly fixed in grooves formed between adjacent protective units by utilizing the self structures, the auxiliary plate is centrally fixed on the first frames, the holes are used for displaying brand LOGO, when the holes are through holes, the brand LOGO is fixed on the first frames in the corresponding area of the holes, when the holes are blind holes, the brand LOGO is fixed on the holes, the size of the auxiliary plate is designed according to the length of the first frames, the length of the auxiliary plate is generally 1/4-1 of the length of the first frames, and when the length of the auxiliary plate is longer, a plurality of inserting strips are arranged between two ends of the auxiliary plate and used for better fixing the auxiliary plate.
The invention also provides a new energy automobile battery pack which comprises a plurality of battery pack units and connecting clamping grooves, wherein the battery pack units are the new energy automobile battery pack, the battery pack units are arranged up and down, the battery pack units are connected and fastened through the connecting clamping grooves, the connecting clamping grooves comprise stop blocks, a plurality of connecting strips are symmetrically arranged on the upper side and the lower side of each stop block, a second frame group and a second frame group of two adjacent battery pack units are connected and fixed through the connecting clamping grooves, the connecting strips on the two sides of each stop block are respectively inserted into the T-shaped protective structures of the second frame groups of the two adjacent battery pack units up and down, so that the fastening and the connection of the two adjacent battery pack units up and down are realized, and the middle stop block is used for separating the two adjacent battery pack units up and down and preventing mutual collision in the running process of a vehicle.
Furthermore, both ends of the insertion strip of the auxiliary plate are provided with first connecting holes, the auxiliary plate of the upper adjacent battery pack unit and the auxiliary plate of the lower adjacent battery pack unit are fixedly connected through the first connecting holes by using a connecting piece, the upper end of the connecting piece is fixed at the first connecting hole at the lower end of the insertion strip of the upper battery pack unit, the lower end of the connecting piece is fixed at the first connecting hole at the upper end of the insertion strip of the lower battery pack unit, the connection and fixation between the upper adjacent battery pack unit and the lower adjacent battery pack unit are realized, the auxiliary fixation effect between the upper adjacent battery pack unit and the lower adjacent battery pack unit is realized, and the connecting piece is in threaded connection with the first connecting holes.
Furthermore, the upper end and the lower end of the auxiliary plate are respectively provided with corresponding second connecting holes, the auxiliary plates of the upper adjacent battery pack unit and the lower adjacent battery pack unit are fixedly connected through the second connecting holes by using connecting pieces, and the connecting pieces are in threaded connection with the second connecting holes, so that the effect of further assisting and fixing the upper adjacent battery pack unit and the lower adjacent battery pack unit is achieved.
Furthermore, the lower end of a second frame of the bottom battery pack unit is provided with a protective strip, and the upper end of the second frame of the top battery pack unit is provided with a protective strip, so that the upper end and the lower end of the battery pack are protected.
Further, the cover plate is manufactured by extruding aluminum alloy, if the extruding method is difficult to process at one time, a plurality of cover plates can be prepared by stirring friction welding, and preferably, the length of the cover plate is 0.3 m-1.5 m, and the width of the cover plate is 1.8 m-3.0 m. The cooling partition plate is an extruded section of aluminum alloy, so that the support of the battery pack mounted on the cooling partition plate can be fixed, the temperature regulation of the battery pack can be realized, and the battery pack can be ensured to work within a relatively proper temperature range. The supporting bottom plate is a base of the whole battery pack and used for supporting the weight of the whole battery pack, and the supporting bottom plate is an aluminum alloy extruded section. The first frame and the second frame are both aluminum alloy extruded sections.
The invention also provides a manufacturing method of the new energy automobile battery pack, which comprises the following steps:
step S1: connecting and fastening the support bottom plate and the first frame on one side through threads to ensure that the first frame is vertical to the support bottom plate;
step S2: fastening the fixed supporting bottom plate in the step S1, the first frame on one side and the second frames on two sides through screws to ensure that the second frames on two sides are vertical to the bottom plate and the second frames are vertical to the first frames;
and step S3: sequentially placing corresponding battery packs at corresponding positions of the supporting base plate according to a set sequence to form a first layer of battery combination;
and step S4: connecting the positive and negative electrodes of adjacent battery packs in the first layer of battery packs in sequence through electric wires to form a positive output end, namely a high-voltage port, and a negative output end, namely a low-voltage port;
step S5: inserting the first layer of cooling partition plate into the corresponding inserting grooves of the second frame and the 2 first frames, and fastening the first layer of cooling partition plate, the second frame and the first frames through the threads of the second frame and the first frames to realize the fixation of the first layer of cooling partition plate, the second frame and the first frames and form an integral structure;
step S6: sequentially placing the second layer of battery packs at corresponding positions of the first layer of cooling partition plate according to a corresponding sequence to form a second layer of battery combination;
step S7: connecting the positive and negative electrodes of adjacent battery packs in the second layer of battery packs in sequence through electric wires to form a positive output end, namely a high-voltage port, and a negative output end, namely a low-voltage port;
step S8: repeating the steps S5 to S7 to respectively place the rest cooling partition plates and the battery pack until the installation of all the cooling partition plates and the battery pack is completed;
step S9: assembling another first frame and the structural body combined in the steps S1-S8 and fastening the structural body through screws to ensure that the second frame is parallel to another second frame, the second frame is vertical to the 2 first frames, and the second frame is vertical to the supporting bottom plate;
step S10: connecting the high-voltage port and the low-voltage port of each layer of battery pack to the high-voltage interface and the low-voltage interface of the battery pack through wires;
step S11: a branch liquid inlet of each layer of cooling partition plate is respectively connected with a main liquid inlet on the cover plate by a pipeline, and a branch liquid outlet of each layer of cooling partition plate is respectively connected with a main liquid outlet on the cover plate;
step S12: and (4) assembling the cover plate with the battery pack structure formed in the step (S11), and connecting and fastening the cover plate with the battery pack structure through threads to finally form a complete battery pack.
Further, the method also comprises the following steps:
step S13: inserting the connecting clamping grooves into T-shaped protective structures outside second frames on two sides of the battery pack;
step S14: hoisting the second assembled battery pack to the upper part of the first battery pack;
step S15: slowly moving the lifted battery pack to enable the clamping grooves on the two sides to be just inserted into the corresponding T-shaped protective structures outside the second frames;
step S16: and repeating the steps S13 to S15 to realize the combination of a plurality of battery packs.
Further, the method also comprises the following steps:
step S17: and the lower ends of the second frames on the two sides of the bottom battery pack unit and the upper ends of the second frames on the two sides of the top battery pack unit are provided with the upper protection strips, so that the bottom and the top of the battery pack are protected.
Further, the method also comprises the following steps: and connecting and fixing the auxiliary plates of the upper and lower adjacent battery pack units through the first connecting hole at the upper end of the inserting strip of the (N-1) th layer of battery pack unit and the first connecting hole at the lower end of the inserting strip of the Nth layer of battery pack unit by using a connecting piece, wherein N is the total number of the battery pack units and is more than or equal to 2.
Further, the method also comprises the following steps: and connecting and fixing the auxiliary plates of the upper and lower adjacent battery pack units by using a connecting piece through a second connecting hole at the upper end of the auxiliary plate of the (N-1) th layer of battery pack unit and a second connecting hole at the lower end of the auxiliary plate of the Nth layer of battery pack unit, wherein N is the total number of the battery pack units and is more than or equal to 2.
The new energy automobile battery pack is simple in structure, good in protection effect, capable of controlling the temperature of the battery pack to be in the optimal working range all the time, low in cost, high in technical maturity, easy to produce in batches, capable of achieving modular processing and combination, capable of being freely combined according to actual conditions, convenient to install and disassemble and capable of achieving repeated use, and the battery pack is obtained in a mode of aluminum alloy extrusion and friction stir welding.
Drawings
The following further explains embodiments of the present invention with reference to the drawings.
Fig. 1 is a schematic structural diagram of a new energy vehicle battery pack according to the present invention;
fig. 2 is a schematic diagram of an internal structure of a new energy vehicle battery pack according to the present invention;
FIG. 3 is a schematic view of a T-shaped protection structure of the new energy vehicle battery pack according to the present invention;
FIG. 4 is an enlarged schematic view at A in FIG. 3;
fig. 5 is a schematic view of a cooling separator of a new energy vehicle battery pack according to the present invention;
fig. 6 is a schematic front view of a first frame (a second frame group) of the new energy vehicle battery pack according to the present invention;
fig. 7 is a schematic side view of a first frame (a second frame set) of the new energy vehicle battery pack according to the present invention;
FIG. 8 is an enlarged schematic view at B in FIG. 1;
fig. 9 is a schematic structural diagram of a connecting clamping groove of the new energy vehicle battery pack according to the present invention;
fig. 10 is a schematic structural view of an auxiliary plate of the new energy vehicle battery pack according to the present invention;
fig. 11 is a structural schematic diagram of a plurality of stacked assemblies of the new energy vehicle battery pack according to the present invention.
A cover plate 1; a support base plate 2; a first frame 31; a second frame 32; the partition plate 4 is cooled; a liquid-cooling plate 41; the support strip 42; a battery pack 5; a guard unit 6; a support portion 61; a guard portion 62; a battery separator 7; an insertion groove 8; aluminum material 81; a connecting clamping groove 9; a stopper 91; a connecting strip 92; a guard bar 10; (ii) a A first fixing strip 101; a second fixing strip 102; a total loading port 11; a main liquid outlet 12; a branch liquid inlet 13; a branch liquid outlet 14; a baffle 15; a high-voltage interface 16; a low-voltage interface 17; a hoisting hole 18; an opening 19; an insertion strip 20; a first connection hole 211; a second connection hole 212; an auxiliary plate 100; an auxiliary plate body 101; a connecting portion 102; .
Detailed Description
Example 1
With reference to fig. 1 to 10, the new energy vehicle battery pack of the present invention includes a cover plate 1, a support base plate 2, a first frame group, a second frame group, a cooling partition plate 4, and a battery pack 5; the upper surface of the cover plate 1 is provided with a T-shaped protective structure, and the upper surface of the cover plate 1 is provided with a high-pressure connector 16, a low-pressure connector 17, a main liquid inlet 11 and a main liquid outlet 12 in an opening manner; the lower surface of the supporting bottom plate 2 is provided with a T-shaped protective structure, the T-shaped protective structure can prevent external force from damaging the internal battery pack 5 during collision, and the T-shaped protective structure can also realize air cooling and heat dissipation during vehicle running, so that heat of the battery pack 5 is dissipated through the T-shaped protective structure, and the battery is ensured to work in a proper temperature range; the first frame group comprises 2 first frames 31,2 first frames 31 which are respectively arranged on a group of opposite sides of the supporting bottom plate 2; the second frame group comprises 2 second frames 32,2 and second frames 32 which are respectively arranged on the other pair of edges of the supporting bottom plate 2; the outer side surfaces of the first frame 31 and the second frame 32 are respectively provided with a T-shaped protective structure, the T-shaped protective structures can prevent external force from damaging the battery pack 5 inside the battery pack when in collision, air cooling and heat dissipation can be realized when a vehicle runs, heat of the battery pack 5 is dissipated through the T-shaped protective structures, and the battery is ensured to work in a proper temperature range; the cover plate 1, the first frame group, the second frame group and the support bottom plate 2 are fixedly connected to form a closed structure together, and the closed structure is used for accommodating functional components in the battery pack; the cooling partition plate 4 comprises a liquid cooling plate 41 and support bars 42, wherein the periphery of the liquid cooling plate 41 is fixedly connected with 42,4 support bars 42 which surround the four sides of the liquid cooling plate 41 and are welded with the liquid cooling plate 41 together in a friction stir welding manner to form the cooling partition plate 4, the number of the liquid cooling plate 41 can be one, or a plurality of liquid cooling plates 41 can be welded into a whole in a friction stir welding manner, the number of the cooling partition plate 4 is at least 1, the liquid cooling plate 41 is provided with a branch liquid inlet 13 and a branch liquid outlet 14, the liquid cooling plate 41 is of a hollow structure, a plurality of baffle plates 15 are arranged inside the liquid cooling plate 41, a temperature adjusting medium enters the liquid cooling plate 41 from the branch liquid inlet 13, flows through a cooling channel under the action of the baffle plates 15, and finally flows out from the branch liquid outlet 14; the branch liquid inlets 13 on the liquid cooling plates 41 are respectively connected with the general liquid inlet 11 on the cover plate 1 through pipelines, and the branch liquid outlets 14 on the liquid cooling plates 41 are respectively connected with the general liquid outlet 12 on the cover plate 1 through pipelines; a plurality of inserting grooves 8 are respectively arranged on the inner sides of the first frame 31 and the second frame 32 and used for limiting the cooling partition plate 4; the support bottom plate 2 and the cooling partition plate 4 are provided with a plurality of battery packs 5, the battery packs 5 are connected in series, namely, the anodes of the battery packs 5 are connected with the cathodes of the adjacent battery packs 5 on one side, the cathodes of the battery packs 5 are connected with the anodes of the adjacent battery packs 5 on the other side, so that the output ends of the anodes, namely high-voltage ports, and the output ends of the cathodes, namely low-voltage ports, are formed respectively, the support bottom plate 2 and the cooling partition plate 4 are provided with battery partition plates 7, and the battery partition plates 7 are used for separating and fixing the adjacent battery packs 5; the T-shaped protection structure comprises a plurality of protection units 6, each protection unit 6 comprises a supporting portion 61 and a protection portion 62, and each protection portion 62 is of an arc-shaped structure.
In this embodiment, preferably, at least one end is equipped with protection strip 10 in the upper and lower both ends of second frame 32, the interval is provided with a plurality of first fixed strips 101 on protection strip 10 terminal surface, and two side end faces adjacent with the terminal surface that sets up first fixed strip 101 all are equipped with second fixed strip 102, protection strip 10 inserts in the space that adjacent protection unit 6 of the T type protective structure of second frame 32 formed through first fixed strip 101, first fixed strip 101 is connected fixedly with second frame 32, and the connected mode is screw connection, second fixed strip 102 is connected fixedly with first frame 31, and the connected mode is screw connection. The end face of the protection strip 10, provided with the first fixing strip 101, is provided with a curved surface structure at intervals, the radian of which is the same as that of the T-shaped protection structure of the second frame 32, and the curved surface structure corresponds to that of the T-shaped protection structure of the second frame 32, so that the protection strip is more attractive.
In this embodiment, the insertion groove 8 preferably includes 2 aluminum materials 81,2 arranged above and below, and the space between the two aluminum materials 81 defines the position of the cooling partition plate 4, and the cooling partition plate 4 is respectively inserted into the insertion groove 8 with the same height as the first side frame 31 and the second side frame 32 and fixed by the support bars 42 on the periphery.
In this embodiment, the length of the battery separator 7 along the second frame 32 is preferably 1/2-1 of the length of the battery pack 5, and preferably, the length of the battery separator 7 along the second frame 32 is 2/3 of the length of the battery pack 5, so that the fixing of the battery pack 5 is ensured and the weight is reduced, the battery separator 7 is fixed to the support base plate 2, the battery separator 7 is fixed to the cooling separator 4 by screws, the battery separator 7 is an aluminum alloy plate, the thickness of the battery separator 7 is 8-12 mm, and preferably, the thickness of the battery separator 7 is 10mm.
In this embodiment, preferably, lifting holes 18 are processed at four corners of the cover plate 1, so as to realize the transportation of the battery pack.
In this embodiment, the temperature of the temperature adjusting medium is preferably 10 to 30 ℃. The temperature adjusting medium is fluid such as water, oil and the like, the external pressurizing device increases pressure on the liquid medium, so that the liquid medium flows into the cooling partition plate 4 from the branch liquid inlet 13 and flows out from the branch liquid outlet 14, heat generated by the battery pack 5 in the battery pack is taken away, the cooling of the battery pack 5 is realized, and the liquid medium can realize the cooling of the battery pack 5 and the heating. The temperature adjusting medium in the pipeline can cool the battery pack 5 in the battery pack when the external environment temperature is high, such as summer, the temperature of the battery pack 5 can be kept when the external environment temperature is low, such as winter, and the temperature of the battery pack 5 is always in the optimal working range by selecting the adjusting medium with different temperatures.
In this embodiment, preferably, an auxiliary plate 100 is disposed on at least one first side frame 31 in the first side frame group, the auxiliary plate 100 includes an auxiliary plate body 101 and connecting portions 102 disposed at two sides of the auxiliary plate body 101, the auxiliary plate body 101 is disposed with an opening 19, one end of the connecting portion 102 away from the auxiliary plate body 101 is disposed with an insertion strip 20, the auxiliary plate 100 is inserted into the T-shaped shielding structure of the first side frame 31 through the insertion strips 20 at two ends and is connected and fixed with the first side frame 31 in a manner of screw connection, or the insertion strip 20 is tightly fixed in a groove formed between adjacent shielding units 6 by using its own structure, the auxiliary plate 100 is centrally fixed on the first side frame 31, the opening 19 is used to display a brand LOGO, when the opening 19 is a through hole, the brand LOGO is fixed on the first side frame 31 in a region corresponding to the opening 19, when the opening 19 is a blind hole, the brand LOGO is fixed on the opening 19, the size of the auxiliary plate 100 is designed according to the length of the first side frame 31, and is generally 1/4-1 of the length of the first side frame 31, preferably, the auxiliary plate 100 is also provided with a connecting portion 102 for fixing the length of the auxiliary plate 100 and the auxiliary plate 100.
In the present embodiment, the cover plate 1 is preferably manufactured by extruding an aluminum alloy, and if the extrusion is difficult to process at one time, a plurality of cover plates 1 may be prepared by friction stir welding, and preferably, the cover plates 1 have a length of 0.3m to 1.5m and a width of 1.8m to 3.0m. The cooling partition plate 4 is an extruded section of aluminum alloy, which can support and fix the battery pack 5 mounted thereon, and can realize temperature regulation of the battery pack 5, thereby ensuring that the battery pack 5 works in a more appropriate temperature range. The supporting base plate 2 is a base of the whole battery pack and used for supporting the weight of the whole battery pack, and the supporting base plate 2 is an aluminum alloy extruded section. The first frame 31 and the second frame 32 are both extruded sections of aluminum alloy.
In the present embodiment, the battery pack 5 is preferably rectangular, and the long side thereof is parallel to the second frame 32, and the short side thereof is parallel to the first frame 31. The structure in the battery pack can be 2-layer, 3-layer, 4-layer and the like, and the structure of the battery pack with N layers needs N-1 layers of cooling separators 4.
The new energy automobile battery package's of this embodiment apron 1, supporting baseplate 2, first frame 31 and second frame 32 all are equipped with T type protective structure, T type protective structure can absorb the energy when external force collides through supporting part 61 and guard part 62, can protect battery package inside group battery 5,T type protective structure supporting part 61 and guard part 62 when suffering external force collision still increased heat radiating area, can realize the vehicle air-cooled heat dissipation when moving, distribute away the heat of group battery 5 through T type protective structure, ensure that the battery works in suitable temperature range. In addition, when the battery pack works, the temperature adjusting medium is respectively sent to the branch liquid inlets 13 of the cooling partition plates 4 from the main liquid inlet 11 through an external pressurizing device, enters the corresponding liquid cooling plates 41 through the branch liquid inlets 13 respectively, flows through the channels under the action of the baffle plates 15 to perform heat exchange and then flows out of the branch liquid outlets 14, and the temperature adjusting medium flowing out of the branch liquid outlets 14 returns to the main liquid outlet 12 through a pipeline, so that the temperature management of the battery can be realized according to the use environment, and the battery is ensured to be in the optimal working state. The T-shaped protection structures of the first frame 31 and the second frame 32 can also be used to fix a plurality of battery packs in an overlapping manner.
The new energy automobile battery pack is simple in structure, good in protection effect, capable of controlling the temperature of the battery pack 5 to be in the optimal working range all the time, low in cost, high in technical maturity, easy to produce in batches, capable of achieving modular processing and combination, capable of being freely combined according to actual conditions, convenient to install and disassemble and capable of achieving repeated use, and the battery pack is obtained in a mode of aluminum alloy extrusion and friction stir welding.
Example 2
As shown in fig. 11, the invention further provides a new energy vehicle battery pack, which includes a plurality of battery pack units and a connecting slot 9, where the battery pack units are the new energy vehicle battery pack, the battery pack units are placed up and down, the battery pack units are connected and fastened through the connecting slot 9, the connecting slot 9 includes a stop block 91, a plurality of connecting strips 92 are symmetrically disposed on the upper and lower sides of the stop block 91, the second frame groups of two adjacent battery pack units are connected and fixed with the second frame groups through the connecting slot 9, the connecting strips 92 on the two sides of the stop block 91 are respectively inserted into the T-shaped protective structures of the second frame groups of two adjacent battery pack units up and down, so as to fasten and connect the two adjacent battery pack units up and down, and the middle stop block 91 is used for separating the two adjacent battery pack units up and down, so as to prevent mutual collision during the vehicle operation. In this embodiment, the outer surface of the stopper 91 is provided with curved surface structures at intervals, which have the same radian as the T-shaped protection structures of the second frame 32, and correspond to the T-shaped protection structures of the second frame 32, and are visually connected into a whole, so that the appearance is more attractive. Preferably, in this embodiment, both ends of the insertion strip 20 of the auxiliary plate 100 are provided with first connection holes 211, the auxiliary plate 100 of two upper and lower adjacent battery pack units is fixedly connected through the first connection holes 211 by using a connection member, the upper end of the connection member is fixed to the first connection hole 211 at the lower end of the insertion strip 20 of the upper battery pack unit, the lower end of the connection member is fixed to the first connection hole 211 at the upper end of the insertion strip 20 of the lower battery pack unit, so as to realize the connection and fixation between the upper and lower adjacent battery pack unit auxiliary plates 100, and play a role in auxiliary fixation between the upper and lower adjacent battery pack units, and the connection member is in threaded connection with the first connection hole 211.
In this embodiment, the upper and lower ends of the auxiliary plate 100 are respectively provided with corresponding second connection holes 212, the auxiliary plate 100 of two adjacent upper and lower battery pack units are connected and fixed through the second connection holes 212 by using a connection member, and the connection member is in threaded connection with the second connection holes 212, so as to further assist and fix the adjacent upper and lower battery pack units.
Preferably, in this embodiment, the lower end of the second frame 32 of the bottom battery pack unit is provided with the protection strip 10, and the upper end of the second frame 32 of the top battery pack unit is provided with the protection strip 10, so as to protect the upper end and the lower end of the battery pack.
Example 3
The invention also provides a manufacturing method of the new energy automobile battery pack, which comprises the following steps:
step S1: the supporting bottom plate 2 is connected and fastened with the first frame 31 on one side through threads, and the first frame 31 and the supporting bottom plate 2 are ensured to be vertical;
step S2: fastening the supporting bottom plate 2 fixed in the step S1, the first frame 31 on one side and the second frames 32 on two sides by screws to ensure that the second frames 32 on two sides are perpendicular to the bottom plate, and the second frames 32 are also perpendicular to the first frames 31;
and step S3: placing the corresponding battery packs 5 at corresponding positions of the support base plate 2 in sequence according to a set sequence to form a first layer of battery pack 5 combination;
and step S4: sequentially connecting the positive electrode and the negative electrode of the adjacent battery packs 5 in the first layer of battery packs 5 through electric wires to form a positive output end, namely a high-voltage port, and a negative output end, namely a low-voltage port;
step S5: inserting the first layer of cooling partition plate 4 into the corresponding inserting grooves 8 of the second frames 32 and the 2 first frames 31, and fastening the first layer of cooling partition plate 4 with the second frames 32 and the first frames 31 through the threads of the second frames 32 and the first frames 31 to realize the fixation of the first layer of cooling partition plate 4 with the second frames 32 and the first frames 31 and form an integral structure;
step S6: sequentially placing the second layer of battery packs 5 at corresponding positions of the first layer of cooling partition plates 4 according to a corresponding sequence to form a second layer of battery pack 5 assembly;
step S7: sequentially connecting the positive and negative electrodes of adjacent battery packs 5 in the second layer of battery packs 5 through electric wires to form a positive output end, namely a high-voltage port, and a negative output end, namely a low-voltage port;
step S8: repeating the steps S5 to S7 to respectively place the rest cooling partition plates 4 and the battery pack 5 until the installation of all the cooling partition plates 4 and the battery pack 5 is completed;
step S9: assembling and fastening the other first frame 31 and the structure combined in the steps S1 to S8 by screws, so as to ensure that the second frame 32 is parallel to the other second frame 32, the second frame 32 is perpendicular to the 2 first frames 31, and the second frame 32 is perpendicular to the support base plate 2;
step S10: connecting the high-voltage port and the low-voltage port of each layer of battery pack 5 to a high-voltage interface 16 and a low-voltage interface 17 of a battery pack through wires;
step S11: a branch liquid inlet 13 of each layer of cooling partition plate 4 is respectively connected with a main liquid inlet 11 on the cover plate 1 by a pipeline, and a branch liquid outlet 14 of each layer of cooling partition plate 4 is respectively connected with a main liquid outlet 12 on the cover plate 1;
step S12: and (4) assembling the cover plate 1 with the battery pack structure formed in the step (S11), and connecting and fastening through threads to finally form a complete battery pack.
This embodiment preferably further includes the following steps:
step S13: inserting the connecting clamping grooves 9 into the T-shaped protective structures outside the second frames 32 at two sides of the battery pack;
step S14: hoisting the second assembled battery pack to the upper part of the first battery pack;
step S15: slowly moving the lifted battery pack to enable the connecting clamping grooves 9 on the two sides to be just inserted into the corresponding T-shaped protective structures outside the second frames 32;
step S16: and repeating the steps S13 to S15 to realize the combination of a plurality of battery packs.
This embodiment preferably further includes the following steps:
step S17: the upper protection bars 10 are installed at the lower ends of the second frames 32 at both sides of the bottom battery pack unit and the upper ends of the second frames 32 at both sides of the top battery pack unit.
This embodiment preferably further includes the following steps: the auxiliary plates 100 of two adjacent upper and lower battery pack units are fixedly connected through the first connection hole 211 at the upper end of the insertion strip 20 of the (N-1) th battery pack unit and the first connection hole 211 at the lower end of the insertion strip 20 of the Nth battery pack unit by using a connection piece, wherein N is the total number of the battery pack units, and N is more than or equal to 2.
This embodiment preferably further includes the following steps: the auxiliary plates 100 of two adjacent upper and lower battery pack units are fixedly connected through the second connecting holes 212 at the upper ends of the auxiliary plates 100 of the N-1 th battery pack unit and the second connecting holes 212 at the lower ends of the auxiliary plates 100 of the N-1 th battery pack unit by using connecting pieces, N is the total number of the battery pack units, and N is more than or equal to 2.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims (16)

1. The utility model provides a new energy automobile battery package which characterized in that: comprises a cover plate (1), a supporting bottom plate (2), a first frame group, a second frame group, a cooling clapboard (4) and a battery pack (5); the upper surface of the cover plate (1) is provided with a T-shaped protective structure, and the upper surface of the cover plate (1) is provided with a high-pressure interface (16), a low-pressure interface (17), a main liquid inlet (11) and a main liquid outlet (12) in an opening manner; the lower surface of the supporting bottom plate (2) is provided with a T-shaped protective structure; the first frame group comprises 2 first frames (31), and the 2 first frames (31) are respectively arranged on a group of opposite sides of the supporting bottom plate (2); the second frame group comprises 2 second frames (32), and the 2 second frames (32) are respectively arranged on the other pair of edges of the supporting bottom plate (2); t-shaped protective structures are arranged on the outer side surfaces of the first frame (31) and the second frame (32); the cover plate (1), the first frame group, the second frame group and the support bottom plate (2) are fixedly connected to form a closed structure together, and the closed structure is used for containing functional components in the battery pack; the cooling partition plates (4) comprise liquid cooling plates (41) and supporting strips (42), the supporting strips (42) are fixedly connected to the periphery of each liquid cooling plate (41), the number of the cooling partition plates (4) is at least 1, a branch liquid inlet (13) and a branch liquid outlet (14) are formed in each liquid cooling plate (41), each liquid cooling plate (41) is of a hollow structure, a plurality of baffle plates (15) are arranged in each liquid cooling plate (41), a temperature adjusting medium enters the liquid cooling plates (41) from the branch liquid inlets (13), flows through cooling channels under the action of the baffle plates (15), and finally flows out of the branch liquid outlets (14); a branch liquid inlet (13) on each liquid cooling plate (41) is respectively connected with a main liquid inlet (11) on the cover plate (1) through a pipeline, and a branch liquid outlet (14) on each liquid cooling plate (41) is respectively connected with a main liquid outlet (12) on the cover plate (1) through a pipeline; the inner sides of the first frame (31) and the second frame (32) are respectively provided with a plurality of inserting grooves (8) for limiting the cooling partition plate (4); a plurality of battery packs (5) are arranged on the supporting bottom plate (2) and the cooling partition plate (4), the battery packs (5) are connected in series, battery partition plates (7) are arranged on the supporting bottom plate (2) and the cooling partition plate (4), and the battery partition plates (7) are used for separating and fixing the adjacent battery packs (5); t type protective structure includes a plurality of protective unit (6), protective unit (6) are including supporting part (61) and guard portion (62), guard portion (62) are the arc structure.
2. The new energy automobile battery pack of claim 1, characterized in that: at least one end is equipped with protection strip (10) in the upper and lower both ends of second frame (32), the interval is provided with a plurality of first fixed strips (101) on protection strip (10) terminal surface, and two side end faces adjacent with the terminal surface that sets up first fixed strip (101) all are equipped with second fixed strip (102), in protection strip (10) inserted the space that adjacent protection unit (6) of the T type protective structure of second frame (32) formed through first fixed strip (101), first fixed strip (101) are connected fixedly with second frame (32), second fixed strip (102) are connected fixedly with first frame (31).
3. The new energy automobile battery pack according to claim 1, characterized in that: inserting groove (8) are including 2 aluminum product (81) that set up from top to bottom, and the position of cooling baffle (4) is injectd to the interval between 2 aluminum product (81), cooling baffle (4) are pegged graft respectively in inserting groove (8) internal fixation of first frame (31) and second frame (32) co-altitude through support bar (42) all around.
4. The new energy automobile battery pack according to claim 1, characterized in that: the length of the battery separator (7) along the second frame (32) is 1/2-1 of the length of the battery pack (5).
5. The new energy automobile battery pack according to claim 1, characterized in that: hoisting holes (18) are processed at four corners of the cover plate (1).
6. The new energy automobile battery pack of claim 1, characterized in that: the temperature of the temperature adjusting medium is 10-30 ℃.
7. The new energy automobile battery pack according to claim 1, characterized in that: an auxiliary plate (100) is arranged on at least one first frame (31) in the first frame group, the auxiliary plate (100) comprises an auxiliary plate body (101) and connecting parts (102) arranged on two sides of the auxiliary plate body (101), an opening (19) is formed in the auxiliary plate body (101), an inserting strip (20) is arranged at one end, far away from the auxiliary plate body (101), of each connecting part (102), and the auxiliary plate (100) is inserted into a T-shaped protection structure of the first frame (31) through the inserting strips (20) at two ends and is fixedly connected with the first frame (31).
8. The utility model provides a new energy automobile battery package which characterized in that: the novel energy automobile battery pack comprises a plurality of battery pack units and connecting clamping grooves (9), wherein the battery pack units are the novel energy automobile battery pack as claimed in any one of claims 1 to 7, the battery pack units are placed up and down, the battery pack units are connected and fastened through the connecting clamping grooves (9), the connecting clamping grooves (9) comprise stop blocks (91), a plurality of connecting strips (92) are symmetrically arranged on the upper side and the lower side of each stop block (91), the second frame groups and the second frame groups of two adjacent battery pack units are connected and fixed through the connecting clamping grooves (9), the connecting strips (92) on the two sides of each stop block (91) are respectively inserted into T-shaped protective structures of the first frame groups of the two adjacent battery pack units up and down, fastening and connection of the two adjacent battery pack units up and down are achieved, and the middle stop block (91) is used for separating the two adjacent battery pack units up and down.
9. The new energy automobile battery pack according to claim 8, characterized in that: two ends of the insertion strip (20) of the auxiliary plate (100) are respectively provided with a first connecting hole (211), and the auxiliary plates (100) of two adjacent upper and lower battery pack units are fixedly connected through the first connecting holes (211) by using a connecting piece.
10. The new energy automobile battery pack according to claim 8, characterized in that: the upper end and the lower end of the auxiliary plate (100) are respectively provided with corresponding second connecting holes (212), and the auxiliary plates (100) of the upper and the lower two adjacent battery pack units are fixedly connected through the second connecting holes (212) by using connecting pieces.
11. The new energy automobile battery pack according to claim 8, characterized in that: the lower end of the second frame (32) of the bottom battery pack unit is provided with a protective strip (10), and the upper end of the second frame (32) of the top battery pack unit is provided with the protective strip (10).
12. A manufacturing method of a new energy automobile battery pack is characterized by comprising the following steps: the method comprises the following steps:
step S1: connecting and fastening the support bottom plate (2) and the first frame (31) on one side through threads, and ensuring that the first frame (31) is vertical to the support bottom plate (2);
step S2: fastening the fixed supporting bottom plate (2) and the first frame (31) on one side and the second frames (32) on two sides through screws, ensuring that the second frames (32) on two sides are perpendicular to the bottom plate, and keeping the second frames (32) perpendicular to the first frames (31);
and step S3: sequentially placing the corresponding battery packs (5) at corresponding positions of the supporting base plate (2) according to a set sequence to form a first layer of battery pack (5);
and step S4: sequentially connecting the positive electrode and the negative electrode of the adjacent battery packs (5) in the first layer of battery packs (5) through electric wires to form a positive output end, namely a high-voltage port, and a negative output end, namely a low-voltage port;
step S5: inserting the first layer of cooling partition plate (4) into the corresponding inserting grooves (8) of the second frame (32) and the 2 first frames (31), and fastening the second frame (32) and the first frames (31) through the threads of the second frame (32) and the first frames (31) to fix the first layer of cooling partition plate (4), the second frame (32) and the first frames (31) and form an integral structure;
step S6: sequentially placing the second layer of battery pack (5) at the corresponding position of the first layer of cooling partition plate (4) according to the corresponding sequence to form a second layer of battery pack (5);
step S7: sequentially connecting the positive electrode and the negative electrode of the adjacent battery packs (5) in the second layer of battery packs (5) through electric wires to form a positive output end, namely a high-voltage port, and a negative output end, namely a low-voltage port;
step S8: repeating the steps S5 to S7 to respectively place the rest cooling partition plates (4) and the battery pack (5) until the installation of all the cooling partition plates (4) and the battery pack (5) is completed;
step S9: assembling another first frame (31) and the structure combined in the steps S1-S8 and fastening the structure through screws to ensure that the second frame (32) is parallel to another second frame (32), the second frame (32) is vertical to the 2 first frames (31), and the second frame (32) is vertical to the supporting bottom plate (2);
step S10: connecting the high-voltage port and the low-voltage port of each layer of battery pack (5) to a high-voltage interface (16) and a low-voltage interface (17) of a battery pack through wires;
step S11: a branch liquid inlet (13) of each layer of cooling partition plate (4) is respectively connected with a main liquid inlet (11) on the cover plate (1) by a pipeline, and a branch liquid outlet (14) of each layer of cooling partition plate (4) is respectively connected with a main liquid outlet (12) on the cover plate (1);
step S12: and (4) assembling the cover plate (1) with the battery pack structure formed in the step (S11), and finally forming a complete battery pack through threaded connection and fastening.
13. The manufacturing method of the new energy automobile battery pack according to claim 12, characterized in that: also comprises the following steps:
step S13: inserting the connecting clamping grooves (9) into T-shaped protective structures outside second frames (32) at two sides of the battery pack;
step S14: hoisting the second assembled battery pack to the upper part of the first battery pack;
step S15: slowly moving the lifted battery pack to enable the connecting clamping grooves (9) on the two sides to be just inserted into the corresponding T-shaped protective structures;
step S16: and repeating the steps S13 to S15 to realize the combination of a plurality of battery packs.
14. The manufacturing method of the new energy automobile battery pack according to claim 13, characterized in that: also comprises the following steps:
step S17: and the lower ends of the second frames (32) at the two sides of the bottom battery pack unit and the upper ends of the second frames (32) at the two sides of the top battery pack unit are provided with the upper protection strips (10).
15. The manufacturing method of the new energy automobile battery pack according to claim 14, characterized in that: also comprises the following steps: the auxiliary plates (100) of two adjacent upper and lower battery pack units are fixedly connected through a first connecting hole (211) at the upper end of the plug-in strip (20) of the battery pack unit of the (N-1) th layer and a first connecting hole (211) at the lower end of the plug-in strip (20) of the battery pack unit of the (N) th layer by using a connecting piece, N is the total number of the battery pack units, and N is more than or equal to 2.
16. The manufacturing method of the new energy automobile battery pack according to claim 14, characterized in that: also comprises the following steps: the auxiliary plates (100) of the upper and lower two adjacent battery pack units are fixedly connected through a second connecting hole (212) at the upper end of the auxiliary plate (100) of the (N-1) th layer of battery pack unit and a second connecting hole (212) at the lower end of the auxiliary plate (100) of the N-1 th layer of battery pack unit by using a connecting piece, N is the total number of the battery pack units, and N is more than or equal to 2.
CN202211167096.1A 2022-09-23 2022-09-23 New energy automobile battery pack and manufacturing method thereof Active CN115411445B (en)

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