CN113889695A - Cover plate structure and assembly process thereof - Google Patents
Cover plate structure and assembly process thereof Download PDFInfo
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- CN113889695A CN113889695A CN202111010650.0A CN202111010650A CN113889695A CN 113889695 A CN113889695 A CN 113889695A CN 202111010650 A CN202111010650 A CN 202111010650A CN 113889695 A CN113889695 A CN 113889695A
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- Prior art keywords
- pole
- cover plate
- coating layer
- rubber coating
- plate structure
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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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/167—Lids or covers characterised by the methods of assembling casings with lids by crimping
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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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/155—Lids or covers characterised by the material
- H01M50/157—Inorganic material
- H01M50/159—Metals
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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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
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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
Abstract
The invention relates to the technical field of power batteries, in particular to a cover plate structure and an assembly process thereof. The cover plate structure includes: the aluminum flake is provided with an accommodating cavity; the pole is arranged in the accommodating cavity; the primary rubber coating layer is at least partially coated on the outer side of the pole, and the pole and the smooth aluminum sheet are arranged at intervals; and the secondary encapsulating layer is fixedly connected with the smooth aluminum sheet and is suitable for limiting the movement of the polar column. According to the cover plate structure provided by the invention, the primary rubber coating layer is coated on the outer side of the pole, the secondary rubber coating layer is further formed by injection molding after the pole is placed in the accommodating cavity, the pole is fixed by adopting an assembly structure coated with rubber twice, a riveting structure is not needed, the number of parts of the cover plate is reduced, the height of the pole is reduced, the weight of the cover plate is reduced, the integral energy density of a battery cell is favorably improved, and meanwhile, the primary rubber coating layer and the secondary rubber coating layer play an insulating role, so that the safety requirement is met.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a cover plate structure and an assembly process thereof.
Background
With the development of new energy technology, more and more automobile manufacturers select a lithium ion battery as a power battery of an electric automobile, and research on the lithium ion battery technology is continuously broken through.
In the prior art, the cover plate structure of the power battery mainly adopts the riveting assembly technology as the mainstream, however, the cover plate structure assembled in the riveting mode is more in number of parts and complex in assembly process, the height of a pole is higher, the whole energy density of the battery cell is not favorably improved, and in addition, the cover plate structure assembled in the riveting mode is heavier and is not favorable for the lightweight design of the power battery and the whole vehicle.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of complex assembly form of the cover plate structure in the prior art, so as to provide a cover plate structure with simple assembly form.
The invention aims to solve another technical problem of overcoming the defect of complex assembly process of the cover plate structure in the prior art, thereby providing the cover plate structure assembly process with simple assembly process.
In order to solve the above technical problem, the present invention provides a cover plate structure, including:
the aluminum flake is provided with an accommodating cavity;
the pole is arranged in the accommodating cavity;
the primary rubber coating layer is at least partially coated on the outer side of the pole, and the pole and the smooth aluminum sheet are arranged at intervals;
and the secondary adhesive coating layer is fixedly connected with the smooth aluminum sheet and is suitable for separating the pole and the smooth aluminum sheet.
Optionally, the aluminum flake includes: a crimping portion configured as a thin-walled structure surrounding the receiving cavity;
the crimping portion is provided with an initial position for allowing the polar column to be mounted and forming yielding and a use position for limiting the polar column to be separated from the use position.
Optionally, the secondary rubber coating layer includes: the embedded part is filled between the crimping part and the pole at the use position;
and the outer wrapping part is wrapped outside the curling part positioned at the using position.
Optionally, the pole includes:
the mounting skirt edge is arranged to protrude out of the circumferential outer surface of the pole and is suitable for being matched and connected with the primary rubber coating layer;
at least partial region is formed with the side cut on the installation shirt rim, the side cut is suitable for once the rubber coating layer with utmost point post assembly back, the restriction once the rubber coating layer with the relative rotation of utmost point post.
Optionally, the protruding is provided with on the one time rubber coating and prevents turning round in the boss, be provided with on the smooth aluminum sheet and prevent turning round the groove, prevent turning round the boss be suitable for with prevent turning round groove cooperation joint.
Optionally, the pole includes: and the slotted hole is formed on the upper surface of the pole and is suitable for performing rubber coating positioning on the primary rubber coating layer.
Optionally, the cover plate structure further includes:
and the sealing ring is arranged between the mounting skirt edge and the polished aluminum sheet and is suitable for sealing a gap between the pole and the polished aluminum sheet.
Optionally, the primary rubber coating layer and the secondary rubber coating layer are made of the same material.
The invention provides a cover plate structure assembling process, which comprises the following steps:
coating a primary adhesive coating layer outside the pole;
placing the polar column coated with the primary rubber coating layer into a containing cavity of a smooth aluminum sheet;
crimping the crimping part, so that the crimping part moves from an initial position to a use position;
and carrying out injection molding and encapsulation on the cover plate structure to form a secondary encapsulating layer.
Optionally, the assembly process of the cover plate structure further includes:
fixing the aluminum flake and the plastic body;
and welding an explosion-proof valve on the polished aluminum sheet.
The technical scheme of the invention has the following advantages:
1. according to the cover plate structure provided by the invention, the primary rubber coating layer is coated on the outer side of the pole, the secondary rubber coating layer is further formed by injection molding after the pole is placed in the accommodating cavity, the pole is fixed by adopting an assembly structure coated with rubber twice, a riveting structure is not needed, the number of parts of the cover plate is reduced, the height of the pole is reduced, the weight of the cover plate is reduced, the integral energy density of a battery cell is favorably improved, and meanwhile, the primary rubber coating layer and the secondary rubber coating layer play an insulating role, so that the safety requirement is met.
2. According to the cover plate structure provided by the invention, the edge curling part is arranged on the polished aluminum sheet, and the edge curling part is provided with the initial position for yielding for the installation of the pole and the use position for limiting the pole to be separated, so that the pole is conveniently installed at the initial position, the limit effect on the pole is ensured at the use position, the separation is avoided, the pole is fixed by means of the edge curling part on the polished aluminum sheet, the pole does not need to be fixed by means of a riveting structure, the number of parts of the cover plate is reduced, the height of the pole is effectively reduced, and the integral energy density of a battery cell is favorably improved.
3. According to the cover plate structure provided by the invention, the mounting skirt edge is arranged on the pole, so that the cover plate structure can be conveniently matched with the supporting part and the edge curling part which are formed by extending the smooth aluminum sheet, the edge curling part and the supporting part are not required to clamp the upper surface and the lower surface of the pole, and the overall height of the smooth aluminum sheet and the pole is reduced.
4. According to the cover plate structure provided by the invention, the anti-torsion boss is arranged at the bottom of the primary rubber coating layer and is matched with the anti-torsion groove on the polished aluminum sheet, so that an anti-torsion effect is achieved, the relative movement of the polar column and the polished aluminum sheet is avoided, and the structure is more stable.
5. According to the cover plate structure assembling process provided by the invention, the number of cover plate structural members can be effectively reduced, the manufacturing cost of the structural members is reduced, and further the cost of the battery cell is reduced, and meanwhile, the height of the pole can be reduced through the process, and the energy density of the battery cell is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is an exploded view of the cover plate structure of the present invention;
FIG. 2 is a schematic view of a pole of the present invention;
FIG. 3 is a schematic view of the terminal post and the primary encapsulating layer of the present invention;
FIG. 4 is a bottom view of the post and the primary encapsulating layer of the present invention;
FIG. 5 is a front view of the post and the primary encapsulating layer of the present invention;
FIG. 6 is a front view of the invention before hemming the smooth aluminum sheet;
FIG. 7 is a top view of the assembled state of the aluminum flake and the pole before being curled;
FIG. 8 is a schematic view of the invention after the hem has been formed;
FIG. 9 is a top view of the invention after the hem has been formed from a plain aluminum sheet;
FIG. 10 is a schematic cross-sectional view taken along line A-A of FIG. 9;
FIG. 11 is a schematic view of the cover plate structure of the present invention after being encapsulated twice;
FIG. 12 is a top view of the cover structure of the present invention after secondary encapsulation;
fig. 13 is a schematic cross-sectional view B-B of fig. 12.
Description of reference numerals:
1-secondary rubber coating layer, 11-embedded part, 12-external coating part, 2-primary rubber coating layer, 21-torsion-proof boss, 3-pole, 31-sink slotted hole, 32-trimming, 33-installation skirt edge, 4-sealing ring, 5-smooth aluminum sheet, 51-edge curling part, 52-containing cavity, 53-torsion-proof groove, 6-plastic body, 8-explosion-proof valve and 9-explosion-proof valve patch.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
As shown in fig. 1 to 13, the cover plate structure provided in this embodiment includes:
the aluminum flake 5 is provided with an accommodating cavity 52;
the pole 3 is arranged in the accommodating cavity 52;
the primary rubber coating layer 2 is at least partially coated on the outer side of the pole 3, and the pole 3 and the smooth aluminum sheet 5 are arranged at intervals;
and the secondary adhesive coating layer 1 is fixedly connected with the smooth aluminum sheet 5 and is suitable for separating the pole and the smooth aluminum sheet.
Preferably, be provided with on the light aluminum sheet 5 and be used for holding the chamber 52 that holds of utmost point post 3, it runs through along upper and lower direction to hold chamber 52 light aluminum sheet 5 is convenient for utmost point post 3 with light aluminum sheet 5 is connected the back, can make utmost point post 3 and other structures of upper and lower position switch on.
Preferably, the relative below of holding chamber 52 by light aluminum sheet 5 extends and is formed with the supporting part, the supporting part is used for right utmost point post 3 supports, avoids utmost point post 3 follows drop in the light aluminum sheet 5.
Preferably, once the rubber coating layer 2 encircles the circumference setting of utmost point post 3, the cladding in the utmost point post 3 outside to utmost point post 3 place in back in the chamber 52 that holds of light aluminum sheet 5, make utmost point post 3 not with light aluminum sheet 5 direct contact, but borrow by once rubber coating layer 2 with light aluminum sheet 5 contacts. Preferably, the primary rubber coating layer 2 is in transition fit or clearance fit with the polished aluminum sheet 5. Preferably, the lower surface of the primary encapsulating layer 2 abuts against a supporting portion formed by extending the aluminum flake 5, and the upper surface of the primary encapsulating layer 2 abuts against the hem portion 51.
Preferably, secondary rubber coating layer 1 is in utmost point post 3 place in back in the chamber 52 that holds of light aluminum sheet 5 is in through injection moulding on the light aluminum sheet 5, secondary rubber coating layer 1 can with at least partial region fixed connection on the light aluminum sheet 5 to make light aluminum sheet 5 and 3 looks intervals of utmost point post set up, play good insulating effect.
Preferably, the post 3 includes a positive post and a negative post, and correspondingly, the smooth aluminum sheet 5 is provided with two containing cavities 52 for respectively containing the positive post and the negative post. Preferably, the positive pole column is made of aluminum, the negative pole column is made of a copper-aluminum composite plate and is manufactured by a cold heading process.
The apron structure that this embodiment provided, through the rubber coating layer 2 once in 3 outside claddings of utmost point post, and place in holding the chamber 52 back at utmost point post 3, further injection moulding secondary rubber coating layer 1, adopt the assembly structure of twice rubber coating, realize the fixed to utmost point post 3, need not with the help of the riveting structure, the spare part quantity of apron has been reduced, reduce utmost point post height, lighten the weight of apron, be favorable to promoting the holistic energy density of electric core, borrow simultaneously by a rubber coating layer 2 and secondary rubber coating layer 1 and play insulating effect, satisfy the safety requirement.
Preferably, compared with the traditional cover plate structure, the cover plate structure provided by the embodiment has a simpler structural form, the number of parts is relatively reduced, and the cost of the cover plate structure can be effectively reduced, so that the cost of the battery cell is reduced; simultaneously, the apron structure is the integrative structure of secondary rubber coating of moulding plastics, can effectively reduce the weight of apron, reduces the overall height of utmost point post, effectively promotes the whole energy density of electric core.
Specifically, the flake aluminum 5 includes: a crimping portion 51 configured as a thin-walled structure surrounding the accommodation chamber 52;
the crimping portion 51 has an initial position for the installation of the post 3 to form a relief, and a use position for restricting the post 3 from coming out.
Referring to fig. 6, which is a front view of the polished aluminum sheet before being curled, a curled portion 51 is provided on the polished aluminum sheet 5, and before the polished aluminum sheet is curled, the curled portion 51 is located at an initial position, that is, as shown in fig. 6, the curled portion 51 extends in a direction perpendicular to a plane of the polished aluminum sheet 5, so that an opening of the accommodating cavity 52 is in a maximum state, and the terminal 3 is conveniently placed in the accommodating cavity 52. The crimping part 51 is configured as a thin-walled structure surrounding the accommodating cavity 52, so that under the action of a crimping machine, the thin-walled structure can be bent and deformed, and then the crimping part 51 covers the position, relatively above the pole 3, of the pole 3, and the wall-surface pole 3 is pulled out. Since the aluminum flake 5 is made of aluminum, the aluminum flake has ductility, and the flange part 51 constructed in a thin-walled structure can be bent without being easily broken by a curling machine, thereby ensuring the structural effectiveness.
Referring to fig. 10, which is a sectional view of the aluminum flake after being curled, after the aluminum flake is curled, the curled portion 51 is located at a use position, that is, as shown in fig. 10, at this time, an extending direction of the curled portion 51 is parallel to a plane where the aluminum flake 5 is located or is arranged at an acute angle, and by the curling operation, the curled portion 51 is shrunk inwards, so that the post 3 is limited in the accommodating cavity 52, and is prevented from being removed.
The apron structure that this embodiment provided, through set up hem portion 51 on smooth aluminum sheet 5, and hem portion 51 has for the initial position that the installation formation of utmost point post 3 abdied, and the restriction the position of use that utmost point post 3 deviates from to convenient utmost point post 3's installation when initial position, and guarantee the limiting displacement to utmost point post 3 when the position of use, avoid deviating from, borrow the hem portion 51 on smooth aluminum sheet 5 and realize fixing utmost point post 3, need not to fix utmost point post 3 with the help of the riveting structure, reduced the spare part quantity of apron, effectively reduce utmost point post height, be favorable to promoting the holistic energy density of electric core.
The utility model discloses a seal structure of light aluminum sheet, including utmost point post 3, light aluminum sheet 5, the utmost point post 3 is separated with the smooth aluminum sheet 5 by means of once gluing layer 2 realization between, plays insulating effect, and is further, can additionally be provided with the sealing washer between utmost point post 3 and the smooth aluminum sheet 5, put into the chamber 52 that holds of light aluminum sheet simultaneously with the utmost point post 3 that once the rubber coating was accomplished to turn-up portion 51 carries out the turn-up, after the turn-up was accomplished, can fix utmost point post 3 on the one hand, on the other hand turn-up portion 51 compression utmost point post 3, utmost point post 3 can compress the sealing washer, plays good sealed effect.
Preferably, when hem portion 51 is located initial position, hold the relative top position opening in chamber 52, be convenient for with utmost point post 3 is placed and is got into hold in the chamber 52, work as utmost point post 3 is put into hold the chamber 52 back, the supporting part of smooth aluminum sheet 5, it is right utmost point post 3 forms the support, the restriction utmost point post 3 removes towards the below. Further, after the crimping portion 51 is adjusted to the use position, the crimping portion 51 covers a relatively upper area of the electrode post 3, and the electrode post 3 is limited from being removed from the plain aluminum sheet 5 from above. So that the polar post 3 is limited in the aluminum flake 5 by the support part and the crimping part 51.
Preferably, the beading portion 51 is beaded by a beading machine.
In the present embodiment, the upper, lower, and vertical orientation names are all referred to the configuration shown in fig. 10 or 13. This is for convenience of description of the present embodiment only and should not be construed as limiting the present embodiment.
Specifically, the pole 3 includes:
the mounting skirt edge 33 protrudes out of the circumferential outer surface of the pole 3 and is suitable for being matched and connected with the primary rubber coating layer 2;
the mounting skirt 33 is formed with a cut edge 32 at least in a partial region, and the cut edge 32 is adapted to limit the relative rotation of the primary encapsulating layer 2 and the pole 3 after the primary encapsulating layer 2 and the pole 3 are assembled.
Preferably, the circumference surface protrusion of utmost point post 3 is formed with installation shirt rim 33 along radial direction, through with the cladding of one time rubber coating layer 2 is on installation shirt rim 33, can guarantee the main part of utmost point post 3 normally switches on, avoids taking place the condition of interfering or contact failure. Meanwhile, as shown in fig. 10, the pole 3 is provided with the mounting skirt 33, which can be conveniently matched with the supporting portion formed by extending the plain aluminum sheet 5 and the crimping portion 51, without clamping the upper and lower surfaces of the pole 3 by the crimping portion 51 and the supporting portion, so that the overall height of the plain aluminum sheet 5 and the pole 3 is reduced.
Preferably, at least a partial region of the mounting skirt 33 is formed with a cut edge 32, as shown in fig. 2, a circumferential outer surface of the mounting skirt 33 is configured to be circular or arc-shaped, and at least a partial region of the mounting skirt 33 is in a straight line form, a wavy line form or a zigzag form, so as to form the cut edge 32, and the cut edge 32 is adapted to limit the relative rotation of the primary encapsulating layer 2 and the pole 3 after the primary encapsulating layer 2 and the pole 3 are assembled. The cut edges 32 serve as twist-proof.
In this embodiment, the mounting skirt 33 is configured as a circle with opposing side edges forming a square.
Preferably, as an implementation form, the overall height of the pole is 4.8mm, and the thickness of the mounting skirt 33 is 1 mm.
Specifically, as shown in fig. 13, the secondary encapsulating layer 1 includes: an embedded part 11 filled between the crimping part 51 and the electrode post 3 at a use position;
and an outer cover 12 covering the outside of the hem 51 at the use position.
Preferably, the secondary rubber coating layer 1 is made in an injection molding mode, and can fill a gap between the pole 3 and the smooth aluminum sheet 5 in the injection molding process.
Because hem portion 51 is after accomplishing the turn-up, and the extending direction of hem portion 51 and smooth aluminum sheet 5 place plane parallel or be acute angle setting, at this moment, leave the gap along the region of upper and lower direction between hem portion 51 and the installation shirt rim 33 after secondary rubber coating layer 1 is accomplished and is moulded plastics, form between hem portion 51 and the installation shirt rim 33 the embedded portion 11 of secondary rubber coating layer 1, embedded portion 11 can make smooth aluminum sheet 5 with utmost point post 3 is connected more firmly, plays the fixed action to utmost point post 3.
Preferably, the secondary adhesive coating layer 1 further includes an outer coating portion 12, and the outer coating portion 12 is coated outside the curling portion 51 located at the use position, so that the secondary adhesive coating layer 1 integrally coats the curling portion 51 to play an insulating protection role between the pole and the aluminum flake.
Specifically, the primary rubber coating layer 2 and the secondary rubber coating layer 1 are made of the same material.
Secondary rubber coating layer 1 moulds plastics and accomplishes the back, can make once rubber coating layer 2 and secondary rubber coating layer 1 hold each other and form wholly, improves sealed effect, guarantees good insulating nature, avoids not hard up of utmost point post 3 simultaneously, and is fixed more firm.
Specifically, as shown in fig. 4, 5 and 6, the anti-twisting boss 21 is protruded from the primary rubber coating layer 2, the anti-twisting groove 53 is formed in the polished aluminum sheet 5, and the anti-twisting boss 21 is suitable for being connected with the anti-twisting groove 53 in a matched manner.
Specifically, the pole 3 includes: and the slotted hole 31 is formed in the upper surface of the pole 3 and is suitable for carrying out rubber coating positioning on the primary rubber coating layer 2. The heavy tank hole 31 of seting up on utmost point post 3 can make things convenient for rubber coating point position and later stage module welding.
Specifically, the cover plate structure further includes:
and the sealing ring 4 is arranged between the mounting skirt edge 33 and the smooth aluminum sheet 5 and is suitable for sealing a gap between the pole 3 and the smooth aluminum sheet 5.
Preferably, as shown in fig. 10, the sealing ring 4 is placed between the mounting skirt 33 and the support portion formed by extending the aluminum flake 5, so as to seal the gap between the lower portion of the pole 3 and the aluminum flake 5.
Example two
Referring to fig. 1, the present embodiment provides a cover plate structure assembling process, including:
a primary adhesive coating layer 2 is coated outside the pole 3;
placing the polar column 3 coated with the primary rubber coating layer 2 into the accommodating cavity 52 of the aluminum flake 5;
crimping the crimping portion 51, and moving the crimping portion 51 from an initial position to a use position;
and carrying out injection molding and encapsulation on the cover plate structure to form a secondary encapsulating layer 1.
According to the cover plate structure assembling process provided by the embodiment, the number of the cover plate structural members can be effectively reduced, the manufacturing cost of the structural members is reduced, the cost of the battery cell is further reduced, the height of the terminal can be reduced through the process, and the energy density of the battery cell is effectively improved.
Preferably, the cover plate structure is assembled by adopting an assembly process of primary rubber coating, curling and secondary rubber coating; the post 3 is firstly encapsulated by one time, the post 3 encapsulated by one time of injection molding and the sealing ring are placed in the containing cavity 52 of the light aluminum sheet, the light aluminum sheet is curled, and the post is encapsulated by two times of injection molding after the curling is finished, so that the performances of the post, such as air tightness, insulativity, pressure resistance, torsion resistance and the like, are finally ensured.
Preferably, the positive pole and the negative pole are respectively encapsulated once and then placed in the accommodating cavity 52 of the polished aluminum sheet after encapsulation, wherein the torsion-proof boss 21 protruding out of the primary encapsulating layer 2 is aligned and matched with the torsion-proof groove 53, so that the torsion-proof effect with the polished aluminum sheet is achieved.
Preferably, the sealing ring and the post which is encapsulated once are sequentially placed in the accommodating cavity 52 of the aluminum flake, the aluminum flake is crimped by using a crimping machine, and the sealing ring is compressed by crimping action, so that a sealing effect is achieved.
Preferably, after the curling is finished, the whole pole is secondarily encapsulated, the insulation protection effect of the pole and the smooth aluminum sheet is achieved while the pole is fixed, and the strength of the pole part is increased.
Specifically, the cover plate structure assembling process further comprises the following steps:
fixing the polished aluminum sheet 5 and the plastic body 6;
and an explosion-proof valve 8 is welded on the polished aluminum sheet 5.
Preferably, the plastic body 6 is fixed on the aluminum flake 5 by means of ultrasonic hot melting.
Preferably, the explosion-proof valve 8 is welded to the plain aluminum sheet 5 by means of laser welding. Further, an explosion-proof valve patch is attached to the explosion-proof valve 8, so that the cover plate structure is assembled.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A cover plate structure, comprising:
the aluminum flake (5) is provided with an accommodating cavity (52);
the pole column (3) is arranged in the accommodating cavity (52);
the primary adhesive coating layer (2) is at least partially coated on the outer side of the pole (3), and the pole (3) and the smooth aluminum sheet (5) are arranged at intervals;
and the secondary encapsulating layer (1) is fixedly connected with the smooth aluminum sheet (5) and is suitable for separating the pole column (3) from the smooth aluminum sheet (5).
2. The cover structure according to claim 1, characterized in that said flake aluminum (5) comprises: a crimping portion (51) configured as a thin-walled structure surrounding the accommodation chamber (52);
the crimping part (51) is provided with an initial position for the installation of the pole (3) to form abdication and a use position for limiting the pole (3) to be separated.
3. Cover plate structure according to claim 2, characterized in that the secondary encapsulating layer (1) comprises: an embedded part (11) filled between the crimping part (51) and the pole (3) at a use position;
and an outer cover (12) that covers the outside of the bead (51) in the use position.
4. The cover plate structure according to claim 1, characterized in that the pole (3) comprises:
the mounting skirt edge (33) protrudes out of the circumferential outer surface of the pole (3) and is suitable for being matched and connected with the primary rubber coating layer (2);
at least partial region is formed with side cut (32) on installation shirt rim (33), side cut (32) are suitable for once rubber coating layer (2) with utmost point post (3) assembly back, the restriction once rubber coating layer (2) with the relative rotation of utmost point post (3).
5. The cover plate structure of claim 4, wherein an anti-twisting boss (21) is convexly arranged on the primary rubber coating layer (2), an anti-twisting groove (53) is arranged on the smooth aluminum sheet (5), and the anti-twisting boss (21) is suitable for being matched and clamped with the anti-twisting groove (53).
6. The cover plate structure according to claim 1, characterized in that the pole (3) comprises: and the slotted hole (31) is formed in the upper surface of the pole (3) and is suitable for carrying out rubber coating positioning on the primary rubber coating layer (2).
7. The cover plate structure according to claim 4, further comprising:
and the sealing ring (4) is arranged between the mounting skirt edge (33) and the smooth aluminum sheet (5) and is suitable for sealing a gap between the polar column (3) and the smooth aluminum sheet (5).
8. The cover plate structure according to any one of claims 1 to 6, wherein the primary encapsulating layer (2) and the secondary encapsulating layer (1) are made of the same material.
9. A cover plate structure assembling process is characterized by comprising the following steps:
a primary adhesive coating layer (2) is coated outside the pole (3);
placing the polar post (3) coated with the primary rubber coating layer (2) into an accommodating cavity (52) of a smooth aluminum sheet (5);
crimping a crimping part (51) to move the crimping part (51) from an initial position to a use position;
and carrying out injection molding and encapsulation on the cover plate structure to form a secondary encapsulating layer (1).
10. The cover plate structure assembling process according to claim 9, further comprising:
fixing the aluminum flake (5) and the plastic body (6);
and an explosion-proof valve (8) is welded on the polished aluminum sheet (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111010650.0A CN113889695A (en) | 2021-08-31 | 2021-08-31 | Cover plate structure and assembly process thereof |
Applications Claiming Priority (1)
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