CN109768199B - Method for manufacturing lower shell of battery cladding - Google Patents
Method for manufacturing lower shell of battery cladding Download PDFInfo
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- CN109768199B CN109768199B CN201910040298.1A CN201910040298A CN109768199B CN 109768199 B CN109768199 B CN 109768199B CN 201910040298 A CN201910040298 A CN 201910040298A CN 109768199 B CN109768199 B CN 109768199B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005253 cladding Methods 0.000 title description 2
- 230000008569 process Effects 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 56
- 238000003466 welding Methods 0.000 claims description 30
- 230000007246 mechanism Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 14
- 239000000565 sealant Substances 0.000 claims description 12
- 239000003292 glue Substances 0.000 claims description 11
- 238000005260 corrosion Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000003754 machining Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 2
- 239000003351 stiffener Substances 0.000 claims 1
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- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
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- 238000003860 storage Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 229910001566 austenite Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Sealing Battery Cases Or Jackets (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a manufacturing method of a lower shell of a battery can, which is characterized in that a cavity is arranged in an edge beam to reduce the weight of the edge beam; in the running process of an automobile, the lower shell of the battery pack mainly bears the stress action in the vertical direction, so that the joint between the boundary beams is easy to deform and destroy.
Description
Technical Field
The invention relates to the technical field of battery packs, in particular to a manufacturing method of a lower shell of a battery pack shell.
Background
With the rapid development of the automobile industry, new energy vehicles are also rapidly developed. New energy vehicles include four major types: hybrid electric vehicles, pure electric vehicles, fuel cell electric vehicles and other new energy vehicles. The power of the motor of the new energy vehicle is mainly supplied by a storage battery, and the storage battery is generally fixedly arranged on the electric vehicle in a battery pack mode through a battery pack shell. At present, the automobile body is designed to be light in weight so as to improve the cruising ability of the automobile. In the lightweight design of the battery can body, the strength of the structure is an important factor to be considered. If the strength of the lower shell is insufficient, the lower shell is easy to deform and damage, so that the air tightness of the battery is abnormal, potential quality hazards such as liquid leakage, rusting and corrosion of electronic components of products are easy to generate, and the battery can not work normally or even be scrapped.
Disclosure of Invention
In view of the above, it is necessary to provide a method for manufacturing a lower case of a battery pack to improve the strength of the lower case of the battery pack.
A method for manufacturing a lower shell of a battery can comprises the following steps:
manufacturing a plurality of edge beams, wherein the edge beams are provided with cavities with openings at two ends along the extending direction;
manufacturing a plurality of reinforcing mechanisms, wherein each reinforcing mechanism comprises a first mounting part and a second mounting part fixedly connected to the first mounting part;
installing a plurality of boundary beams on the periphery of a bottom plate of the shell, enabling the boundary beams to be sequentially connected in an end mode, and enabling adjacent boundary beams to be connected through the reinforcing mechanism, wherein the first installation part is fixed on the side wall of the cavity of one of the boundary beams, and the second installation part is fixed on the side wall of the cavity of the other boundary beam;
and welding and fixing the edge beam which is terminated.
In one of them embodiment, first installation department include first fixed plate and with the first reinforcing plate that first fixed plate is connected, the second installation department include the second fixed plate and with the second reinforcing plate that the second fixed plate is connected, first fixed plate laminating is fixed one on the lateral wall of the cavity of boundary beam, the second fixed plate laminating is fixed another on the lateral wall of the cavity of boundary beam, first fixed plate the first reinforcing plate the second reinforcing plate and the second fixed plate connects gradually, encloses and closes and form the loop configuration.
In one embodiment, the reinforcing mechanism further comprises a reinforcing plate, and two ends of the reinforcing plate are respectively connected to the inner wall of the annular structure.
In one embodiment, the first and second mounting portions are axisymmetrical, and the reinforcing plate is disposed along the axis of symmetry.
In one embodiment, the first fixing plate and the second fixing plate are respectively fixed to the edge beam by blind rivets.
In one embodiment, after the blind rivet is used for fixing, a first sealant is coated on the surface of the blind rivet installation position.
In one embodiment, the cavity of each side beam is multiple, and the multiple cavities are arranged in parallel.
In one embodiment, after the edge beams are welded and fixed, corrosion-resistant glue is coated at the welding position.
In one embodiment, a clearance hole communicated with the cavity is formed in the side beam, and machining chips in the cavity are extracted through the clearance hole after the reinforcing mechanism is installed.
In one embodiment, after the machining chips are extracted, the chip removal hole is plugged by a plugging cover, and a second sealant is coated on the surface of the chip removal hole.
Compared with the prior art, the invention has the following beneficial effects:
according to the manufacturing method of the lower shell of the battery pack shell, the cavity is arranged in the edge beam to reduce the weight of the edge beam; in the running process of an automobile, the lower shell of the battery pack mainly bears the stress action in the vertical direction, so that the joint between the boundary beams is easy to deform and destroy.
Drawings
Fig. 1 is a schematic structural view of a battery pack lower case manufactured by a method of manufacturing a battery pack lower case according to an embodiment;
FIG. 2 is an exploded view of the lower housing of the battery enclosure shown in FIG. 1;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic structural view of a reinforcing mechanism employed in a method of manufacturing a lower case of a battery can according to an embodiment;
FIG. 5 is a schematic view of a plurality of baseplate welds;
FIG. 6 is an enlarged view of portion A of FIG. 5;
FIG. 7 is a schematic structural view of a reinforcing block used in a method of manufacturing a lower case of a battery pack according to an embodiment;
fig. 8 is a schematic view showing the installation of the through-hole rivet nut and the rivet screw in the method of manufacturing the lower case of the battery pack according to the embodiment;
fig. 9 is a schematic view showing the glue application of the blind rivet screw in the method of manufacturing the lower case of the battery pack according to the embodiment.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 4, a method for manufacturing a lower case of a battery pack according to an embodiment of the present invention includes the following steps:
manufacturing a plurality of edge beams, wherein the edge beams are provided with cavities 115 with openings at two ends along the extension direction;
manufacturing a plurality of reinforcing mechanisms 140, wherein each reinforcing mechanism 140 comprises a first mounting part 141 and a second mounting part 142 fixedly connected to the first mounting part 141;
mounting a plurality of edge beams on the periphery of the housing floor 120 such that the plurality of edge beams are sequentially terminated, and adjacent edge beams are connected by a reinforcing mechanism 140, wherein a first mounting portion 141 is fixed to a sidewall of the cavity 115 of one of the edge beams and a second mounting portion 142 is fixed to a sidewall of the cavity 115 of the other edge beam;
and welding and fixing the edge beam which is terminated.
As shown in fig. 1, the edge beams are terminated to each other to form a ring-shaped frame to fix the housing bottom plate 120 therein, in the specific example shown in fig. 1, there are 6 edge beams, including two first edge beams 111, two second edge beams 112 and two third edge beams 113, the two first edge beams 111 are respectively located at two opposite sides of the housing bottom plate 120, the two second edge beams 112 are respectively located at the other two sides of the housing bottom plate 120, and the first edge beam 111 and the second edge beam 112 are connected by the third edge beam 113.
As shown in fig. 4, in one example, the first mounting portion 141 includes a first fixing plate 1412 and a first reinforcing plate 1414 connected to the first fixing plate 1412, the second mounting portion 142 includes a second fixing plate 1422 and a second reinforcing plate 1424 connected to the second fixing plate 1422, the first fixing plate 1412 is attached to a sidewall of the cavity 115 of one edge beam, the second fixing plate 1422 is attached to a sidewall of the cavity 115 of the other edge beam, and the first fixing plate 1412, the first reinforcing plate 1414, the second reinforcing plate 1424 and the second fixing plate 1422 are connected in sequence to form a ring structure.
Further, the reinforcing mechanism 140 further includes a reinforcing plate 143, and both ends of the reinforcing plate 143 are respectively connected to the inner wall of the ring structure. For example, one end of the reinforcing plate 143 is fixed to the inner side of the first fixing plate 1412, and the other end is fixed to the inner side of the first reinforcing plate 1414. In the specific example shown in fig. 4, one end of the reinforcing plate 143 is fixed to a position where the first fixing plate 1412 and the second fixing plate 1422 are connected, and the other end is fixed to a position where the first reinforcing plate 1414 and the second reinforcing plate 1424 are connected. In other examples, a plurality of reinforcing plates may be provided.
As shown in fig. 4, in one example, the first and second mounting parts 141 and 142 are axisymmetrically disposed. In this example, the reinforcing plate 143 may be disposed along the axis of symmetry.
In one example, blind rivets 145 are used to secure the first and second attachment plates 1412, 1422, respectively, to the side rails. In this example, the first and second fastening plates 1412, 1422 are provided with mounting holes 144 for mounting blind rivets 145. Further, in the manufacturing method of the lower shell of the battery pack shell, after the blind rivet is used for fixing, the method further comprises the step of coating the first sealant on the surface of the mounting position of the blind rivet 145. The first sealant can be glue of a bond 2599 type, and the use temperature is-54-250 ℃, so that the air tightness of the shell is ensured, and water leakage is prevented.
In one example, there are a plurality of cavities 115 in each side sill, with the plurality of cavities 115 being arranged in parallel. In this example, a plurality of cavities 115 are provided in the edge beams, the edge beams are relatively strong, and a reinforcing mechanism 140 may be embedded between two adjacent edge beams in one or more pairs of cavities 115.
In one example, adjacent edge beams are welded together by friction stir welding. During welding, equal-height blocks can be used as processing reference tools, and the upper surfaces of the side beams are flush. Furthermore, the edge that is used for being connected with other boundary beams on the boundary beam is equipped with the first arch of reserving of protrusion in the outer wall of boundary beam, makes the protruding looks butt of reserving of first on the adjacent boundary beam during boundary beam installation, and the stirring pin through friction stir welding equipment is impressed first and is reserved protruding, carries out welded fastening with adjacent boundary beam.
In one example, in the manufacturing method of the battery can lower shell, after the edge beam which is terminated is welded and fixed, the method further comprises the step of coating an anti-corrosion glue at the welding position of the adjacent edge beam. Since welding leads to an increase in corrosion sensitivity, this example can reduce the possibility of welding corrosion by coating with an anti-corrosive glue.
In one example, as shown in fig. 2, clearance holes 119 are formed in the side sill in communication with the cavity 115, and after the reinforcing mechanism 140 is installed, the machining chips in the cavity 115 are extracted through the clearance holes 119. Further, after the machining chips are extracted, the chip removal hole 119 is blocked with a block cap and a second sealant is applied to the surface. The plug cover can be made of plastic commonly used in automobile manufacturing, after the plug cover plugs the chip removal hole 119, a second sealant is coated on the outer surface of the plug cover, the second sealant can be precoate 85 type glue, the use temperature is-60-170 ℃, and the air tightness of the shell is guaranteed.
As shown in fig. 1 to 3, in one example, the side member is further provided with a mounting member 116 for attaching the vehicle body, and similarly, the mounting member 116 is provided with a cavity opened at both ends of the mounting member 116 in the extending direction. In one example, the cavity of the mounting beam 116 is sealed at both ends by cover plates 118 that improve the strength and torsional stiffness of the mounting beam 116 and reduce the likelihood of a port pool vibration cracking failure. The thickness of the cover plate 118 may be, but is not limited to, 1-2 mm, such as 1.5 mm.
As shown in fig. 1-2, in one example, the mounting beam 116 is formed with a bushing 117. The bottom of the bushing 117 is in zero clearance fit with the mounting beam 116, so that surface contact is ensured, and stress concentration and crushing damage to the mounting beam 116 are reduced. The bottom edge of the flange of the bushing 117 is designed to be chamfered, so that the bushing 117 can be prevented from crushing the surface of the mounting beam 116 when the mounting beam 116 is stressed in the vertical direction. After the bushing 117 is installed, the surface of the flange of the bushing 117 is subjected to finish milling, and the finish milling allowance is 0.3-0.5 mm, so that the flatness is guaranteed.
Referring further to fig. 5 and 6, in one example, the method for manufacturing the lower case of the battery pack further includes the step of manufacturing the case bottom plate 120. The bottom plate of the housing comprises a plurality of bottom plates 120, and second reserved protrusions 122 protruding from the bottom surface of the bottom plate 120 are arranged at the edges of the bottom plates 120 used for connecting with other bottom plates 120. When the shell bottom plate 120 is installed, the bottom plates 120 are installed on the edge beam, so that the second reserved bulges 122 of the adjacent bottom plates 120 are abutted; and then the stirring pin of the friction stir welding device is pressed into the second reserved bulge 122, so that the adjacent bottom plates 120 are welded and fixed.
Most of the existing battery PACK shells adopt 6061-T6 or 6063-T6 aluminum alloy extruded profiles, and due to the fact that 6 series aluminum alloy materials are low in performance (tensile strength is 260MPa, yield strength is 240MPa, and elongation is larger than or equal to 8%), the weight is heavier, the PACK energy density of the battery PACK is too low, the safety performance is reduced, the light weight technology is backward, the endurance performance of the whole vehicle is influenced, the driving safety of an electric vehicle in the driving process is also influenced, and therefore the existing battery PACK shells are difficult to meet the using requirements. In the embodiment, 7-series aviation aluminum alloy 7005 (with the tensile strength of 380MPa, the yield strength of 350MPa and the elongation rate of more than or equal to 8%) is preferably selected to manufacture the lower shell of the battery pack, so that the lightweight design of the lower shell of the battery pack is facilitated, for example, the local wall thickness of the structural design can be reduced from 2.0mm to 1.5mm, and the total weight of a 6-series battery pack is reduced from 360kg to 353kg and is reduced from 7 kg.
In one example, there are 5 to 8 bottom plates 120 in the lower case, and the plurality of bottom plates 120 are fixed together by welding at side edges. The plurality of base plates 120 are welded, so that the lightweight design of the lower shell of the battery can is facilitated, and the base plates 120 can be designed to be light in weight and thin in thickness. In the specific example shown in fig. 1, there are 8 bottom plates 120 in the lower shell, and the bottom plates 120 are fixed together by welding at the side edges, which is beneficial to extrusion of 7-series high-strength aluminum alloy and has high production feasibility. Specifically, the 8 bottom plates 120 include a first bottom plate 120, a second bottom plate 120, a third bottom plate 120, a fourth bottom plate 120, a fifth bottom plate 120, a sixth bottom plate 120, a seventh bottom plate 120, and an eighth bottom plate 120, which are sequentially spliced, wherein the third bottom plate 120, the fifth bottom plate 120, and the sixth bottom plate 120 have the same shape, and can be extruded by using the same extrusion die, and the 8 bottom plates 120 are extruded by using only 5 extrusion dies.
To ensure the flatness and verticality of the base plate 120, in one example, a straightening process is performed during profile extrusion of the base plate 120. In the extrusion process, the profile is shaped and adjusted by adjusting the roller on the shaping machine, so that the profile is flat. Furthermore, when the bottom plate is extruded, the end part is left with finish machining allowance of 0.5 +/-0.1 mm, the bottom plate 120 is machined in place before welding, and surface contact is formed during butt joint, so that the welding quality is ensured.
In one example, the second reserved protrusion 122 at the edge of the bottom plate 120 protrudes 0.2mm to 0.3mm from the bottom surface of the bottom plate 120, so that the pressing allowance of a stirring pin for friction stir welding is 0.2mm to 0.3mm, the diameter of a shaft shoulder of the stirring pin is 9mm to 10mm, the surface of a welding position after welding is flat, the welding position is flush with the bottom surface of the bottom plate 120 and does not form a welding pit which is sunk into the bottom surface, the strength of the light and thin bottom plate 120 is reduced due to defects formed on the light and thin bottom plate 120, and the splicing straightness quality of the bottom plate 120 is ensured. In one example, the width of the second reserved protrusion 122 is 4 ± 0.5 mm. As shown in fig. 6, when two adjacent bottom plates 120 are butted, the total width of the second reserved projections 122 on both sides is 8 ± 1 mm.
In one example, when the bottom plate 120 is manufactured, a first receiving groove is formed at a side portion of the bottom plate 120 close to the side beam, and a second receiving groove is formed at a position on the side beam corresponding to the first receiving groove. The reinforcing block 130 is connected between the edge beam and the bottom plate 120 in an embedded mode, so that the edge beam is more tightly connected with the bottom plate 120, and the overall structural strength of the shell under the battery can is improved. Meanwhile, the supporting force of the reinforcing block 130 to the base plate 120 acts on the cross section of the base plate 120 and is distributed uniformly on the cross section of the base plate 120. Thus, when the lower shell of the battery can is subjected to arc welding, the reinforcing block 130 can stably and uniformly support the bottom plate 120, so that the bottom plate 120 is prevented from bearing bending moment in the arc welding process, the bottom plate 120 can be kept in high flatness in the arc welding process, and the stable and safe operation of the battery is greatly ensured. Simultaneously, also promote bottom plate 120's intensity, prevent module mounting point position department vibration fracture inefficacy.
Specifically, the reinforcing block 130 is provided with a connecting groove 131 at a first side portion, a supporting member is provided at a bottom of the first receiving groove of the bottom plate 120, the supporting member is disposed in cooperation with the connecting groove 131, the reinforcing block 130 is provided with a connecting protrusion 132 at a second side portion opposite to the first side portion, and the second receiving groove of the side beam is disposed in cooperation with the connecting protrusion 132. Thus, the support member is engaged with the coupling groove 131, so that the reinforcing block 130 is stably mounted on the base plate 120, which is advantageous for improving the stability of the overall structure of the lower case of the battery pack.
Further, the reinforcing block 130 has a plurality of coupling grooves 131 at the first side portion, and correspondingly, the supporting member in the first receiving groove of the base plate 120 has a plurality. In the specific example shown in fig. 7, the two coupling grooves 131 and the two supports are engaged, so that the coupling of the reinforcing block 130 to the base plate 120 is more secure, further improving the stability of the overall structure of the lower case of the battery pack.
In one example, the method of manufacturing the battery can lower case further includes the step of solution treating the welded bottom plate 120 plus an incomplete artificial aging (T5 state). Solution treatment, which is a heat treatment process for heating the alloy to a high-temperature austenite region for heat preservation, fully dissolving the excess phase into the solid solution, and then rapidly cooling to obtain a supersaturated solid solution. Artificial aging is an operation of maintaining for a certain time at a certain temperature higher than room temperature to improve the mechanical properties of the alloy, incomplete artificial aging is an operation of obtaining a supersaturated solid solution by adopting a relatively low aging temperature or a relatively short heat preservation time to obtain excellent comprehensive mechanical properties, namely relatively high strength, good plasticity and toughness.
In one example, the manufacturing method of the lower shell of the battery shell further comprises the step of coating an anti-corrosion glue at least at the welding position of the lower shell after welding, and the possibility of welding corrosion can be reduced by coating the anti-corrosion glue in the example because the welding causes the corrosion sensitivity to be increased.
Further, in one example, the method for manufacturing the lower case of the battery pack can further include the step of priming the base plate 120 subjected to the solution treatment and the incomplete artificial aging treatment with PVC, so as to prevent abrasion, stone impact and rough sealing of the bottom. In the traditional manufacturing method of the lower shell of the battery can, the baking temperature of the PVC base coat is about 180 ℃. Tests show that the baking temperature of the PVC base coat of the soleplate 120 subjected to the solution treatment and the incomplete artificial aging treatment needs to be optimally controlled, in the example, the baking temperature of the PVC base coat is reduced to 140-150 ℃, so that the mechanical properties obtained by the prior aging treatment can be effectively maintained.
Referring to fig. 1, 8 and 9, in one embodiment, a through hole rivet nut 124 for module installation is fabricated on the bottom plate 120, in this example, a third sealant is coated on a flange bottom of the through hole rivet nut 124, and a third sealant is coated on a mounting module rivet screw 126, so that a double-layer sealing effect is achieved, and a requirement for housing sealing is ensured. In the example shown in fig. 6, an outer hexagonal M6 type is used for the blind rivet 126, with an effective pitch of 20mm, and glue is applied to one end of the blind rivet 126 with a pitch of 12 mm. The third sealant can be precoate 85 type glue, and the use temperature is-60-170 ℃, so that the air tightness of the shell is ensured.
Due to the light weight design, the thickness of the bottom plate 120 is thin, so that the bottom plate is easy to weld through when the supports such as the wiring harness and the BMS are welded, and airtight leakage is caused.
According to the manufacturing method of the battery pack lower shell, the cavity 115 is formed in the boundary beam to reduce the weight of the boundary beam, in the driving process of an automobile, the battery pack lower shell mainly bears the stress action in the vertical direction, so that the joint between the boundary beams is easy to deform and break, the reinforcing mechanism 140 is embedded in the cavity 115 of two adjacent boundary beams, the first installation part 141 of the reinforcing mechanism 140 is fixedly connected with the side wall of the cavity 115 of one boundary beam, the second installation part 142 is fixedly connected with the side wall of the cavity 115 of the other boundary beam, the first installation part 141 and the second installation part 142 are fixedly connected, and then the adjacent boundary beams are welded and fixed, so that the connection strength between the boundary beams is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for manufacturing a lower shell of a battery can is characterized by comprising the following steps:
manufacturing a plurality of edge beams, wherein the edge beams are provided with cavities with openings at two ends along the extending direction;
manufacturing a plurality of reinforcing mechanisms, wherein each reinforcing mechanism comprises a first mounting part and a second mounting part fixedly connected to the first mounting part;
installing a plurality of boundary beams on the periphery of a bottom plate of the shell, enabling the boundary beams to be sequentially connected in an end mode, and enabling adjacent boundary beams to be connected through the reinforcing mechanism, wherein the first installation part is fixed on the side wall of the cavity of one of the boundary beams, and the second installation part is fixed on the side wall of the cavity of the other boundary beam;
welding and fixing the edge beam which is terminated;
the manufacturing method of the lower shell of the battery pack shell further comprises the step of manufacturing the shell bottom plate, the shell bottom plate comprises a plurality of bottom plates, second reserved bulges protruding out of the bottom surfaces of the bottom plates are arranged at the edges, connected with other bottom plates, of the bottom plates, and when the shell bottom plate is installed, the bottom plates are installed on the edge beams, so that the second reserved bulges of the adjacent bottom plates are abutted; pressing a stirring pin of friction stir welding equipment into the second reserved bulge, and welding and fixing the adjacent bottom plates;
when the bottom plate is manufactured, a first accommodating groove is formed in the side portion, close to the side beam, of the bottom plate, a second accommodating groove is formed in the side beam, corresponding to the first accommodating groove, and a reinforcing block is embedded in the first accommodating groove and the second accommodating groove before the step of welding and fixing; the reinforcing block is provided with a connecting groove at the first side part, a connecting bulge is arranged at the second side part opposite to the first side part, a support piece is arranged at the bottom of the first accommodating groove of the bottom plate and is matched with the connecting groove, and the second accommodating groove of the side beam is matched with the connecting bulge.
2. The method of claim 1, wherein the first mounting portion includes a first fixing plate and a first reinforcing plate connected to the first fixing plate, and the second mounting portion includes a second fixing plate and a second reinforcing plate connected to the second fixing plate, the first fixing plate is attached to and fixed to a sidewall of the cavity of one of the side beams, the second fixing plate is attached to and fixed to a sidewall of the cavity of the other of the side beams, and the first fixing plate, the first reinforcing plate, the second reinforcing plate, and the second fixing plate are sequentially connected to form a ring structure.
3. The method of making a battery can lower housing as in claim 2, wherein the reinforcing mechanism further comprises a reinforcing plate, both ends of the reinforcing plate being attached to the inner wall of the ring structure, respectively.
4. The method of making a battery can lower housing as in claim 3, wherein the first mounting portion and the second mounting portion are axisymmetrical, the stiffener being disposed along the axis of symmetry.
5. The method of claim 2, wherein the first and second securing plates are secured to the side beams, respectively, with blind rivets.
6. The method of claim 5, wherein a first sealant is applied to a surface where the blind rivet is installed after the blind rivet is used for fixing.
7. The method of making a battery can lower housing as in claim 1, wherein there are a plurality of cavities in each of the side beams, the plurality of cavities being arranged in parallel.
8. The method of claim 1, wherein an anti-corrosion glue is applied to the welded location after the terminating edge beams are welded and secured.
9. The method for manufacturing the battery pack lower case according to any one of claims 1 to 8, wherein a clearance hole communicating with the cavity is formed in the side beam, and after the reinforcing mechanism is mounted, the machining chips in the cavity are extracted through the clearance hole.
10. The method of making a battery can lower housing as in claim 9 wherein after extracting process fines, the clearance holes are plugged with a plug and a second sealant is applied to the surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040298.1A CN109768199B (en) | 2019-01-16 | 2019-01-16 | Method for manufacturing lower shell of battery cladding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910040298.1A CN109768199B (en) | 2019-01-16 | 2019-01-16 | Method for manufacturing lower shell of battery cladding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109768199A CN109768199A (en) | 2019-05-17 |
| CN109768199B true CN109768199B (en) | 2021-12-17 |
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| CN201910040298.1A Active CN109768199B (en) | 2019-01-16 | 2019-01-16 | Method for manufacturing lower shell of battery cladding |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112829569A (en) * | 2019-11-22 | 2021-05-25 | 比亚迪股份有限公司 | Battery package tray bottom guard plate and vehicle |
| CN114696022B (en) * | 2020-12-25 | 2023-04-07 | 宁德时代新能源科技股份有限公司 | Battery box, battery, electric equipment, and method and device for preparing box |
| CN111430623B (en) * | 2020-04-20 | 2022-04-15 | 蜂巢能源科技有限公司 | Battery pack assembly |
| EP4015352A1 (en) * | 2020-12-17 | 2022-06-22 | Volvo Car Corporation | Motor vehicle with a combined scalable platform for either an internal combustion engine or a battery-powered electric vehicle |
| CN112701408B (en) * | 2020-12-25 | 2022-12-09 | 孚能科技(赣州)股份有限公司 | Bottom plate structure of box body chassis, battery pack and automobile |
| CN113964430A (en) * | 2021-10-19 | 2022-01-21 | 上汽大众汽车有限公司 | Vehicle battery pack shell assembly |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013133044A (en) * | 2011-12-27 | 2013-07-08 | Kobe Steel Ltd | On-vehicle battery tray and on-vehicle battery frame |
| CN206849898U (en) * | 2017-06-06 | 2018-01-05 | 北京新能源汽车股份有限公司 | Battery casing and side wall subassembly thereof |
| CN107732058A (en) * | 2017-08-29 | 2018-02-23 | 常州普莱德新能源电池科技有限公司 | Battery case and manufacture method |
| CN207320183U (en) * | 2017-06-06 | 2018-05-04 | 北京新能源汽车股份有限公司 | Battery shell and side wall thereof |
| CN207425976U (en) * | 2017-11-10 | 2018-05-29 | 东软集团股份有限公司 | A kind of electric vehicle and its battery pack housing |
| CN207781673U (en) * | 2017-12-05 | 2018-08-28 | 北京普莱德新能源电池科技有限公司 | A kind of integral type water cooling power battery box |
| CN208111535U (en) * | 2018-04-24 | 2018-11-16 | 合肥国轩高科动力能源有限公司 | Aluminum alloy box body for battery pack of pure electric passenger car |
| CN109216622A (en) * | 2018-10-24 | 2019-01-15 | 重庆博奥镁铝金属制造有限公司 | A kind of electric automobile battery box combination plate |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012100977B3 (en) * | 2012-02-07 | 2013-07-18 | Benteler Automobiltechnik Gmbh | Energy storage container i.e. box-shaped aluminum intake carrier, for carrying e.g. lithium-ion cells of energy store module in motor car, has base plate whose profiled element is connected to adjacent element simultaneously as side walls |
| CN103447685B (en) * | 2013-09-10 | 2015-12-23 | 沈阳航空航天大学 | A kind of Friction stir welding method without band arc line figuratrix depression |
| CN206849902U (en) * | 2017-06-06 | 2018-01-05 | 北京新能源汽车股份有限公司 | battery case |
| CN107331807A (en) * | 2017-06-06 | 2017-11-07 | 北京新能源汽车股份有限公司 | battery case |
| CN107732062A (en) * | 2017-09-29 | 2018-02-23 | 凌云工业股份有限公司 | A kind of new-energy automobile aluminum alloy battery lower house and preparation method |
| CN207834395U (en) * | 2017-12-30 | 2018-09-07 | 上海方德尚动新能源科技有限公司 | A kind of novel battery lodge body bottom surface structure |
| CN108767169A (en) * | 2018-08-15 | 2018-11-06 | 北京普莱德新能源电池科技有限公司 | A kind of butt-welding type aluminium alloy module unit tray and battery pack |
| CN109103383A (en) * | 2018-09-06 | 2018-12-28 | 江苏卡耐新能源有限公司 | A kind of power battery pack arrangement and assembly method |
-
2019
- 2019-01-16 CN CN201910040298.1A patent/CN109768199B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013133044A (en) * | 2011-12-27 | 2013-07-08 | Kobe Steel Ltd | On-vehicle battery tray and on-vehicle battery frame |
| CN206849898U (en) * | 2017-06-06 | 2018-01-05 | 北京新能源汽车股份有限公司 | Battery casing and side wall subassembly thereof |
| CN207320183U (en) * | 2017-06-06 | 2018-05-04 | 北京新能源汽车股份有限公司 | Battery shell and side wall thereof |
| CN107732058A (en) * | 2017-08-29 | 2018-02-23 | 常州普莱德新能源电池科技有限公司 | Battery case and manufacture method |
| CN207425976U (en) * | 2017-11-10 | 2018-05-29 | 东软集团股份有限公司 | A kind of electric vehicle and its battery pack housing |
| CN207781673U (en) * | 2017-12-05 | 2018-08-28 | 北京普莱德新能源电池科技有限公司 | A kind of integral type water cooling power battery box |
| CN208111535U (en) * | 2018-04-24 | 2018-11-16 | 合肥国轩高科动力能源有限公司 | Aluminum alloy box body for battery pack of pure electric passenger car |
| CN109216622A (en) * | 2018-10-24 | 2019-01-15 | 重庆博奥镁铝金属制造有限公司 | A kind of electric automobile battery box combination plate |
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