CN114843660A

CN114843660A - Manufacturing process of new energy battery box based on extruded section

Info

Publication number: CN114843660A
Application number: CN202210630658.5A
Authority: CN
Inventors: 何峰; 陈世远
Original assignee: Chongqing New Aluminum Times Technology Co ltd
Current assignee: Chongqing New Aluminum Times Technology Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-08-02
Anticipated expiration: 2042-06-06
Also published as: CN114843660B

Abstract

The invention discloses a manufacturing process of a new energy battery box based on an extruded section, which comprises the steps of extrusion molding, section sawing, bottom plate welding, milling flow channels on a bottom plate integral machine, flow channel cleaning, chock block welding, machining of a frame component and an accessory, welding of the frame and the accessory with the bottom plate, air tightness testing, cleaning, pressure drop testing, final inspection and the like. The remarkable effects are as follows: the strength and rigidity of the whole box bottom plate can be guaranteed under the condition of meeting the liquid cooling performance, and the obtained battery box liquid cooling system is good in reliability, bearing capacity, surface evenness and heat exchange effect.

Description

Manufacturing process of new energy battery box based on extruded profile

Technical Field

The invention relates to the technical field of new energy automobile accessory processing, in particular to a manufacturing process of a new energy battery box body based on an extruded section.

Background

With the rapid development of new energy vehicles, the endurance mileage becomes the focus of attention of users, and for new energy vehicles, the most effective method for increasing the endurance mileage is to increase the energy density of a battery pack, that is, more batteries are arranged in a limited space, and more electric quantity is discharged by the batteries in the use process. In order to maximize the performance of the battery, a liquid cooling system is usually disposed inside the battery pack to maintain the battery at a proper operating temperature.

The battery liquid cooling system types of the current new energy vehicle market mainly include the following:

1. harmonica tube type liquid cooling plate

The harmonica tube type liquid cooling plate has the advantages of low cost, light weight, relatively simple structure, high production efficiency and the like, but the harmonica tube type liquid cooling plate has a single flow channel, small contact area and thin pipeline wall, so that the heat exchange effect is general and the bearing capacity is poor.

2. Ram type liquid cooling plate

The stamping type liquid cooling plate has the advantages of being capable of designing a flow channel at will, large in contact area, good in heat exchange effect, high in production efficiency, good in pressure resistance and strength and the like, but the cost is high due to the fact that the die is required to be opened, the requirement on flatness is high, and the installation difficulty is large.

3. Inflation type liquid cooling plate

The inflation type liquid cooling plate has the advantages of low cost, good heat exchange effect, high production efficiency and the like, but has larger short plate in the aspects of pressure resistance and strength due to the soft material.

4. Parallel flow pipe type liquid cooling belt

The parallel flow tube type liquid cooling belt has the advantages of good heat exchange effect and suitability for cylindrical battery cores, but the structure is complex, so the cost is high.

Therefore, there is an urgent need to develop a technology that can solve the above problems.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a manufacturing process of a new energy battery box based on an extruded section, and the obtained battery box has the advantages of good reliability, good bearing capacity, good surface flatness, good heat exchange effect and the like.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the manufacturing process of the new energy battery box based on the extruded profile is characterized by comprising the following steps:

step 1: extruding and forming a required section and inspecting;

step 2: sawing and cleaning the section;

and step 3: carrying out friction welding and splicing on the front and back surfaces of a plurality of single bottom plates obtained by sawing by adopting a first friction welding tool, and carrying out secondary sawing to obtain a box body bottom plate;

and 4, step 4: carrying out integral machine milling flow channel processing on the box body bottom plate by adopting a flow channel machine processing device, and ensuring that no residual mechanical reinforcement position exists;

and 5: cleaning the flow channel of the processed box body bottom plate;

step 6: adopting a first friction welding tool to weld and fix the chock block at the position to be welded of the cleaned box body bottom plate to form a heat exchange liquid flow channel;

and 7: carrying out machining and cleaning on the frame assembly, the lifting lug and the water nozzle obtained by sawing;

and 8: welding a frame assembly on the box body bottom plate to form a box body frame by adopting a second friction welding tool, welding lifting lugs on the box body frame, and welding a water nozzle and a water nozzle protective sleeve on the box body bottom plate to obtain a battery box body primary product;

and step 9: performing air tightness test on the welded battery box body primary product, obtaining a battery box body finished product if the test is passed, and otherwise performing repair welding on a leakage position;

step 10: and cleaning, testing the pressure drop and finally inspecting the finished product of the battery box body, and packaging the qualified product.

Furthermore, the first friction welding tool comprises a first welding platform, a plurality of first fixed limiting blocks are arranged on the first welding platform, first compression cylinders are fixed on two sides of the first welding platform, telescopic rods of the first compression cylinders on two sides are connected in a one-to-one correspondence mode through first compression rods, and a plurality of first compression heads are connected to the bottoms of the first compression rods.

Furthermore, a first movable limiting block is further arranged on the first welding platform and at least arranged on one side of the first welding platform, and the distance between the first movable limiting block and the first fixed limiting block on the opposite side of the first movable limiting block is adjustable.

Further, the specific steps of forming the heat exchange liquid flow channel by the box body bottom plate are as follows:

step 61: placing the chock block on the position to be welded on the bottom plate of the box body according to design and accurately positioning the chock block to ensure that the chock block structure is tightly matched with the upper side and the lower side of the flow channel;

step 62: welding the chock by using a friction stir welding head with the penetration depth of not less than 2mm, welding the friction stir welding head from one end of the chock to the other end during welding, and performing turning-around welding on the middle part of the chock after the friction stir welding head reaches the other end of the chock so that a fabrication hole formed after welding is reserved in the middle of the chock;

and step 63: carrying out repair welding process hole and welding end caps at two ends on the section bar after the chock block is welded;

step 64: and carrying out air tightness test on the welded box body bottom plate, and if the test fails, carrying out repair welding on the leakage position.

Further, the width of the shaft shoulder of the friction stir welding head and the width of the partition structure in the step 62 satisfy the following relation:

G＝Z*2-2，

wherein G is the width of the partition structure, and Z is the width of the shaft shoulder of the friction stir welding drill bit.

Furthermore, the runner machining device comprises a machining platform, wherein a pushing mechanism is arranged on the front side of the machining platform, a limiting mechanism is arranged on the rear side of the machining platform, a stretching positioning mechanism is arranged on the left side of the machining platform, the pushing mechanism, the limiting mechanism and the stretching positioning mechanism are used for positioning a box bottom plate to be machined, a supporting mechanism used for supporting a protruding portion of the box bottom plate is arranged on the right side of the machining platform, a plurality of machining pressing tight cylinders are arranged on the front side and the rear side of the machining platform respectively, and telescopic rods of the machining pressing tight cylinders on the front side and the rear side are connected through one-to-one machine pressing tight rods.

Furthermore, the pushing mechanism comprises a pushing base, a pushing cylinder is fixed on the pushing base, and a telescopic rod of the pushing cylinder penetrates inwards to penetrate through the pushing base to be connected with a pushing head.

Furthermore, second friction welding frock includes second welded platform it is right to be provided with a plurality of locating component that are used for on the second welded platform the box frame carries out the location, this locating component distribute with second welded platform's front and back side and right side second welded platform's left side is fixed with a plurality of liftout subassemblies, first frame and compresses tightly subassembly, lug and compress tightly the subassembly, the second frame compresses tightly the subassembly both sides are fixed with third frame and compress tightly the subassembly with the fourth frame around the second welded platform the left rear side of second welded platform still is fixed with and pushes away the material subassembly the right side of second welded platform is fixed with fifth frame and compresses tightly subassembly and sixth frame and compresses tightly the subassembly.

Furthermore, first frame compresses tightly the subassembly and locates separately both sides around the second welding platform compress tightly the subassembly at two first frames and set gradually between the subassembly ejecting subassembly, lug compress tightly the subassembly, second frame compress tightly subassembly, ejecting subassembly, second frame compress tightly subassembly, ejecting subassembly, third frame compress tightly the left side that the subassembly was compressed tightly to the fourth frame, the fifth frame compresses tightly the subassembly and locates the both sides around the subassembly of sixth frame compress tightly.

Furthermore, the structure of the second frame pressing assembly is consistent with that of the sixth frame pressing assembly.

The invention has the following remarkable effects: the integrated manufacturing process of the liquid cooling plate and the existing battery tray is adopted, the liquid cooling plate and the existing battery tray are organically combined, the structural design is scientific, the integral strength and rigidity of a box bottom plate can be guaranteed under the condition of meeting the liquid cooling performance, the production is convenient, the assembly relation can be simplified, the manufacturing cost is reduced, the use of liquid cooling pipelines is reduced, the leakage risk is reduced, the space utilization rate of a battery pack is improved, meanwhile, the light weight and the cost are reduced, the obtained battery box body liquid cooling system is good in reliability, good in bearing capacity, good in surface evenness and good in heat exchange effect.

Drawings

FIG. 1 is a flow chart of a method of the present invention;

FIG. 2 is a schematic structural view of a battery case;

FIG. 3 is a schematic view of the flow path of the heat exchange liquid in the battery case;

FIG. 4 is a schematic structural view of the first friction welding tool;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a schematic structural view of the flow channel machining tool;

FIG. 7 is a schematic structural view of a second friction welding tool;

FIG. 8 is a front view of a second friction welding tool;

FIG. 9 is a top view of a second friction welding tool;

FIG. 10 is a schematic view of the construction of the topping assembly;

FIG. 11 is a schematic view of a first frame hold-down assembly;

FIG. 12 is a schematic view of a second frame compression assembly;

FIG. 13 is a schematic structural view of a third frame compression assembly;

FIG. 14 is a schematic view of a fourth frame compression assembly;

fig. 15 is a schematic structural view of a fifth bezel compression assembly.

Detailed Description

The following provides a more detailed description of the embodiments and the operation of the present invention with reference to the accompanying drawings.

As shown in fig. 1, a manufacturing process of a new energy battery box based on an extruded profile comprises the following steps:

step 1: the required section bar is extruded and molded and is inspected, the inspection requires that the appearance of the section bar has no defects of cracking, air bubbles, deformation, twisting, obvious scratch and oxidation on the surface, and the material, mechanical property, size, harmful substances and salt spray test reach the standard;

step 2: sawing the section by using a sawing machine, and cleaning after sawing;

5% degreasing agent is adopted for cleaning; the pH value is 2.0-2.5; adding a degreasing agent and water into the cleaning tank once a day, and testing; completely replacing the pool water every two months;

the cleaning method comprises the following steps:

1. firstly, washing incoming materials by a high-pressure water gun;

2. then placing the mixture into a medicine water pool to soak for 5-8 minutes;

3. and finally, sequentially placing the products into a first cleaning pool and a second cleaning pool, and taking out the products after the products are completely submerged, wherein the action needs to be repeated for 3 times or more.

And step 3: a first friction welding tool 20 is adopted to perform friction welding and splicing on the front and back surfaces of a plurality of single bottom plates obtained by sawing, and a box body bottom plate is obtained after secondary sawing;

when friction welding splicing is carried out, the height difference of the welding line is less than or equal to 0.5mm, and cracks are not allowed to exist in the welding line;

the welding width is uniform and consistent, the surface of the welding seam presents uniform scaly veins, no welding head hole is formed at the end part of the welding seam, no obvious tool lifting and pressing trace is required, and the maximum pressing amount is not more than 0.2 mm; the feeding speed is less than or equal to 1100-1500 mm/min; the rotating speed is 1800-2000 rad/min; if a 2mm stirring head without a stirring needle is adopted, the feeding speed is less than or equal to 2800-3000 mm/min, the rotating speed is 1800-2000 rad/min, the stirring head is replaced every 4 hours, and the stirring head can be reused after being cooled for half an hour in a natural state and is immediately replaced after being worn.

And 4, step 4: a runner machining device 30 is adopted to perform integral machining and runner milling on the box body bottom plate, and no residue of a mechanical reinforced rib is ensured;

specifically, the method comprises the following steps: after welding, the height difference of the welding line is less than or equal to 0.5mm, cracks are not allowed to exist in the welding line, the same friction welding line is not allowed to go twice, the welding width is uniform and consistent, the surface of the welding line is in uniform scaly lines, obvious tool lifting and pressing traces cannot be generated, and the maximum pressing amount cannot exceed 0.2 mm; when a 3mm stirring head is adopted for welding, the feeding speed is less than or equal to 800-1000 mm/min, the rotating speed is 1500-1800 rad/min, the pressing amount is not more than 0.5mm, the stirring head is replaced every 4 hours, and the stirring head can be reused and immediately replaced after being cooled for half an hour in a natural state and abraded.

And 5: cleaning the flow channel of the processed box body bottom plate;

the cleaning in this step is the same as the cleaning described in step 2.

Step 6: adopting a first friction welding tool 20 to weld and fix the chock block 22 at the position to be welded of the cleaned box body bottom plate to form a heat exchange liquid flow channel;

the specific steps of forming the heat exchange liquid flow channel on the box body bottom plate are as follows:

step 61: the chock block 22 is placed at the position to be welded on the bottom plate of the box body according to design and is accurately positioned, so that the structure of the chock block 22 is tightly matched with the upper side and the lower side of the flow channel;

step 62: welding the chock block 22 by using a friction stir welding head with the fusion depth not less than 2mm, wherein the friction stir welding head is welded from one end to the other end of the chock block 22 during welding, and is turned around and welded to the middle part of the chock block 22 after reaching the other end of the chock block 22, so that a process hole formed after welding is reserved in the middle of the chock block 22;

the width of the shaft shoulder of the friction stir welding head and the width of the partition structure satisfy the following relational expression:

G＝Z*2-2，

wherein G is the width of the partition structure, Z is the shoulder width step 63 of the friction stir welding drill bit: performing repair welding process holes and welding plugs at two ends on the section welded with the plug blocks 22;

In the embodiment, the chock block is widened, friction welding is used for welding from one end of the separation joint to the other end of the separation joint, the end of the chock block 22 is reached and then turned around and welded to the middle of the chock block 22, the friction welding process hole is located in the middle of the chock block 22, the chock block 22 and the harmonica plate section are integrally formed in the position through friction welding, and therefore the one-time passing rate of the airtightness test after the process hole is welded is greatly improved, and thermal deformation is not obvious.

And 7: carrying out machining and cleaning on the frame assembly, the lifting lug and the water nozzle obtained by sawing, wherein the cleaning method refers to the step 2;

and 8: welding a frame component on the box body bottom plate to form a box body frame by adopting a second friction welding tool 40, welding lifting lugs on the box body frame, and welding a water nozzle and a water nozzle protective sleeve on the box body bottom plate to obtain a primary product of the battery box body 10;

and step 9: performing air tightness test on the welded battery box body 10 initial product, obtaining a battery box body 10 finished product if the test is passed, and otherwise performing repair welding on a leakage position;

step 10: and cleaning, testing the pressure drop and finally inspecting the finished battery box body 10, and packaging qualified products.

As shown in fig. 2 and 3, the battery box 10 includes a box frame 11 and a box bottom plate 12 both made of extruded aluminum profile, the side edge of the box bottom plate 12 is fixedly connected to the box frame 11 by friction welding, a liquid flow channel 13 is formed in the box bottom plate 12, at least two protrusions 14 are formed by extending the end of the box bottom plate 12 outwards, a recess groove adapted to the protrusions 14 is formed at the bottom of the box frame 11, the protrusions 14 are arranged in the recess groove and the bottom surfaces of the protrusions are flush with the bottom surface of the box frame 11, a liquid outlet 15 communicated with the liquid flow channel 13 is arranged on one of the protrusions 14, a liquid inlet 16 communicated with the liquid flow channel 13 is arranged on the other protrusions 14, and a liquid inlet pipe 17 is connected to the liquid inlet 16.

Preferably, the liquid inlets 16 are respectively arranged at two sides of the box bottom plate 12, the two liquid inlets 16 are connected with the liquid inlet pipe 17 through liquid inlet branch pipes 18, and the liquid outlets 15 are respectively arranged at the middle part of the box bottom plate 12; through the cooling liquid circulation heat transfer mode of going out liquid in the middle of the above-mentioned setting formation both sides feed liquor to compare in traditional unilateral feed liquor unilateral play liquid mode heat transfer effect better.

In this example, the box body frame 11 includes longitudinal beams 111 symmetrically disposed on both sides and cross beams 112 connected to both ends of the longitudinal beams 111, and the longitudinal beams 111 are provided with a plurality of fixing holes 113, which are convenient for the installation and fixation of the box body frame 11; the protruding part 14 is formed on the outer side of the cross beam 112 on one side, a lifting lug 114 is fixed on the outer wall of the cross beam 112 on the other side, and the lifting lug 114 is used for facilitating the lifting and transferring of the whole box body; an avoidance step 115 is further formed on one side of the longitudinal beam 111 close to the lifting lug 114 so as to avoid other structures in the vehicle body; a reinforcing beam 116 is fixedly arranged above the cross beam 112 to improve the structural strength of the box body frame 11.

Referring to fig. 3, the bottom plate 12 of the box body is formed by welding a plurality of harmonica-shaped extrusion section single bodies 121 in a splicing manner, the gap between the welding positions is smaller than 0.5mm, the height difference is smaller than 0.5mm, the front side and the back side of the box body are welded, and the liquid flow channel 13 is formed by machining off the rib positions of the extrusion section single bodies 121 and then welding the rib positions with the plug blocks 122 welded at the rib positions.

As shown in fig. 4 to 5, the first friction welding tool 20 includes a first welding platform 21, a plurality of first fixed limiting blocks 26 are disposed on the first welding platform 21, first pressing cylinders 22 are fixed on both sides of the first welding platform 21, telescopic rods of the first pressing cylinders 22 on both sides are connected in a one-to-one correspondence manner through first pressing rods 23, a plurality of first pressing heads 24 are connected to the bottom of the first pressing rods 23, a first movable limiting block 25 is further disposed on the first welding platform 21, the first movable limiting block 25 is at least disposed on one side of the first welding platform 21, and a distance between the first movable limiting block 25 and the first fixed limiting block 26 on the opposite side of the first movable limiting block 25 is adjustable.

Referring to fig. 6, the runner machining device 30 includes a machining platform 31, a material pushing mechanism 32 is disposed on the front side of the machining platform 31, a limiting mechanism 33 is disposed on the rear side of the machining platform 31, an extending positioning mechanism 34 is disposed on the left side of the machining platform 31, the material pushing mechanism 32, the limiting mechanism 33 and the extending positioning mechanism 34 are used for positioning the box bottom plate 12 to be machined, a supporting mechanism for supporting the protruding portion 114 of the box bottom plate 12 is disposed on the right side of the machining platform 31, a plurality of machining pressing cylinders 36 are disposed on the front side and the rear side of the machining platform 31, the telescopic rods of the machining pressing cylinders 36 on the front side and the rear side are correspondingly connected through the machining pressing rods 37, and a plurality of machining pressing heads 38 are connected to the bottom of the frame pressing rod 37.

Further, the material pushing mechanism 32 includes a material pushing base 321, a material pushing cylinder 322 is fixed on the material pushing base 321, and an expansion rod of the material pushing cylinder 322 penetrates the material pushing base 321 inwards to be connected with a material pushing head 323.

Through the runner machining device 30 with the structure, the bottom plate 12 of the box body can be well positioned and compressed, so that the situation that the bottom plate is not displaced in the machining process is ensured, and the product quality is ensured.

As shown in fig. 7 to 9, the second friction welding tool 40 includes a second welding platform 41, a plurality of positioning assemblies 42 for positioning the box frame 11 are disposed on the second welding platform 41, the positioning assemblies 42 are distributed on the front side, the rear side and the right side of the second welding platform 41, a plurality of material ejecting assemblies 43, a first frame pressing assembly 44, a lifting lug pressing assembly 45 and a second frame pressing assembly 46 are fixed on the left side of the second welding platform 41, a third frame pressing assembly 47 and a fourth frame pressing assembly 48 are fixed on the front side and the rear side of the second welding platform 41, a material pushing assembly 49 is further fixed on the left rear side of the second welding platform 41, and a fifth frame pressing assembly 410 and a sixth frame pressing assembly 411 are fixed on the right side of the second welding platform 41.

Referring to fig. 9, the first frame pressing assemblies 44 are respectively disposed at front and rear sides of the second welding platform 41, the material ejecting assembly 43, the lifting lug pressing assembly 45, the second frame pressing assembly 46, the material ejecting assembly 43, the second frame pressing assembly 46, and the material ejecting assembly 43 are sequentially disposed between the two first frame pressing assemblies 44, the third frame pressing assembly 47 is disposed at a left side of the fourth frame pressing assembly 48, and the fifth frame pressing assemblies 410 are disposed at front and rear sides of the sixth frame pressing assembly 411.

As shown in fig. 10, the ejector assembly 43 includes an ejector seat 431 and a driving handle 432, a hinge 433 and a sliding sleeve 435 are fixed on two sides of the ejector seat 431, one end of the driving handle 432 is hinged to the hinge 433, and the middle of the driving handle 432 is hinged to an ejector rod 436 penetrating through the sliding sleeve 435 through a hinge block 434. When the positioning unit 42 is provided on the right side of the second welding stage 41, the left and right ends of the battery case to be welded can be fixed by the cooperation of the ejector unit 43 on the left side of the above-described structure.

As shown in fig. 11, the first frame pressing assembly 44 includes a first pressing base 441 fixedly connected to the second welding platform 41, a first welding pressing cylinder 442 is fixed to the first pressing base 441, an output shaft of the first welding pressing cylinder 442 is hinged to a first welding pressing shaft 443, a first mounting position 444 and a second mounting position 445 having a height difference are formed on the first welding pressing shaft 443, and a first welding pressing head 446 is mounted and fixed to both the first mounting position 444 and the second mounting position 445.

The two first welding rams 446 with a height difference enable the first frame pressing assembly 44 to be adapted to the frame cross beam 112 and the reinforcing beam 116 in the box frame 11, so that the cross beam 112 and the reinforcing beam 116 can be well pressed and fixed.

In this example, the second frame pressing assembly 46 and the sixth frame pressing assembly 411 have the same structure, as shown in fig. 12, the second frame pressing assembly 46 includes a second pressing base 462, a rotary pressing cylinder 462 is fixed to the second pressing base 461, and an output shaft of the rotary pressing cylinder 462 is connected to a second welding pressure head 464 through a second welding pressure shaft 463.

As shown in fig. 13, the third frame pressing assembly 47 includes a third pressing seat 471, a third pressing cylinder 472 is mounted on the third pressing seat 471, an output shaft of the third pressing cylinder 472 is connected to a U-shaped first mounting frame 474 through a third welding pressing shaft 473, a center of the first mounting frame 474 is fixedly connected to the third welding pressing shaft 473, and a third welding ram 475 is disposed at four vertices of the first mounting frame 474.

As shown in fig. 14, the fourth frame pressing assembly 48 includes a fourth pressing base 481, a fourth pressing cylinder 482 is mounted on the fourth pressing base 481, an output shaft of the fourth pressing cylinder 482 is connected to an H-shaped second mounting bracket 484 via a fourth welding pressing shaft 483, a center of the H-shaped second mounting bracket 484 is fixedly connected to the fourth welding pressing shaft 483, and fourth welding pressing heads 485 are disposed at four vertices of the second mounting bracket 484.

Because the longitudinal beam 111 of the box frame 11 of the battery box 10 is formed with the avoiding step 115, the third frame pressing component 47 and the fourth frame pressing component 48 are matched, so that the whole box frame 11 with different widths can be well fixed, and the displacement in the welding process is avoided.

As shown in fig. 15, the fifth frame pressing unit 410 includes a fifth pressing base 4101, a fifth pressing cylinder 4102 is mounted on the fifth pressing base 4101, and a fifth welding ram 4105 is connected to an output shaft of the fifth pressing cylinder 4102 via a fifth welding press shaft 4103.

Through the cooperation that foretell first ~ sixth frame compressed tightly the subassembly, can compress tightly fixedly whole box frame 11, simultaneously in liftout subassembly 43, locating component 42, welded platform 41 and box bottom plate 12's in the box frame 11 cooperation under, can realize the good fixed of the three six ascending of XYZ triaxial of battery box, the fixed spacing of a plurality of degrees of freedom of battery box has been realized, consequently whole course of working can not appear rocking or displacement, product processingquality has been guaranteed effectively, and production efficiency is improved.

This embodiment manufacturing process adopt integrated liquid cooling board and the integrated manufacturing process of current battery tray, combine liquid cooling board and current battery tray, its structural design science, can be under the condition that satisfies the liquid cooling performance, guarantee the holistic intensity rigidity of box bottom plate, the production of being convenient for, and can simplify the assembly relation, reduce manufacturing cost, the use of liquid cooling pipeline has been reduced, the risk of revealing has been reduced, the space utilization of battery package has been improved, light-weighted and cost reduction has been realized simultaneously, the battery box liquid cooling system good reliability that obtains, bearing capacity is good, surface smoothness is good, the heat transfer is effectual.

The technical solution provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. A manufacturing process of a new energy battery box based on an extruded section is characterized by comprising the following steps:

step 1: extruding and forming a required section and inspecting;

step 2: sawing and cleaning the section;

and 5: cleaning the flow channel of the processed box body bottom plate;

2. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 1, wherein the manufacturing process comprises the following steps: the first friction welding tool comprises a first welding platform, a plurality of first fixed limiting blocks are arranged on the first welding platform, first compression cylinders are fixed on two sides of the first welding platform, telescopic rods of the first compression cylinders on the two sides are connected through first compression rods in a one-to-one correspondence mode, and a plurality of first compression heads are connected to the bottom of each first compression rod.

3. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 2, wherein: the first welding platform is further provided with a first movable limiting block, the first movable limiting block is at least arranged on one side of the first welding platform, and the distance between the first movable limiting block and the first fixed limiting block on the opposite side of the first movable limiting block is adjustable.

4. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 1, wherein the manufacturing process comprises the following steps: the specific steps of forming the heat exchange liquid flow channel on the box body bottom plate are as follows:

step 62: welding the chock by using a friction stir welding head with the fusion depth of not less than 2mm, welding the chock from one end of the chock to the other end by using the friction stir welding head during welding, and performing turning-around welding on the middle part of the chock after the friction stir welding head reaches the other end of the chock so that a process hole formed after welding is reserved in the middle of the chock;

5. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 1, wherein the manufacturing process comprises the following steps: in step 62, the width of the shaft shoulder of the friction stir welding head and the width of the partition structure satisfy the following relational expression:

G＝Z*2-2，

6. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 1, wherein the manufacturing process comprises the following steps: runner machine tooling dress is including machine with the platform the front side of machine with the platform is provided with pushing equipment the rear side of machine with the platform is provided with stop gear the left side of machine with the platform is provided with stretches out positioning mechanism, pushing equipment, stop gear with stretch out positioning mechanism and be used for fixing a position the box bottom plate of treating processing the right side of machine with the platform is provided with the supporting mechanism who is used for providing the support to the protruding portion of box bottom plate the front side of machine with the platform is equipped with a plurality of machine pressurization tight cylinders with the rear side branch, and the telescopic link of the machine pressurization tight cylinder of front and back side passes through the machine pressurization tight pole one-to-one and is connected the bottom of frame compression rod is connected with a plurality of machine pressurization tight heads.

7. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 6, wherein the manufacturing process comprises the following steps: the pushing mechanism comprises a pushing base, a pushing cylinder is fixed on the pushing base, and a telescopic rod of the pushing cylinder penetrates inwards to penetrate through the pushing base to be connected with a pushing head.

8. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 1, wherein the manufacturing process comprises the following steps: second friction welding frock includes second welded platform it is right to be provided with a plurality of being used for on the second welded platform the box frame carries out the locating component who fixes a position, this locating component distribute with second welded platform's front and back side and right side second welded platform's left side is fixed with a plurality of liftout subassemblies, first frame and compresses tightly subassembly, lug and compress tightly subassembly, second frame and compress tightly the subassembly both sides are fixed with third frame and compress tightly subassembly and fourth frame and compress tightly the subassembly around second welded platform's left rear side still is fixed with and pushes away the material subassembly second welded platform's right side is fixed with fifth frame and compresses tightly subassembly and sixth frame and compress tightly the subassembly.

9. The manufacturing process of the new energy battery box based on the extruded section bar as claimed in claim 8, wherein: first frame compresses tightly the subassembly branch and locates both sides around the second welding platform set gradually between two first frames compress tightly the subassembly liftout subassembly, lug compress tightly the subassembly, the second frame compresses tightly subassembly, liftout subassembly, second frame and compresses tightly subassembly, second frame and compress tightly subassembly, liftout subassembly, the third frame compresses tightly the subassembly and locates the left side that the fourth frame compressed tightly the subassembly, the fifth frame compresses tightly the subassembly and locates both sides around the sixth frame compresses tightly the subassembly.

10. The manufacturing process of the new energy battery box based on the extruded profile as claimed in claim 8 or 9, wherein: the structure of the second frame pressing assembly is consistent with that of the sixth frame pressing assembly.