CN114006094B - Welding-free sealed type battery cell cover plate - Google Patents

Welding-free sealed type battery cell cover plate Download PDF

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Publication number
CN114006094B
CN114006094B CN202111252768.4A CN202111252768A CN114006094B CN 114006094 B CN114006094 B CN 114006094B CN 202111252768 A CN202111252768 A CN 202111252768A CN 114006094 B CN114006094 B CN 114006094B
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China
Prior art keywords
section
groove
positive
sealing
cover plate
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CN202111252768.4A
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Chinese (zh)
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CN114006094A (en
Inventor
陆宾林
何军生
韦志
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Shenzhen Lebeko Technology Co ltd
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Shenzhen Lebeko Technology Co ltd
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Priority to CN202111252768.4A priority Critical patent/CN114006094B/en
Publication of CN114006094A publication Critical patent/CN114006094A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • H01M50/15Lids or covers characterised by their shape for prismatic or rectangular cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • H01M50/186Sealing members characterised by the disposition of the sealing members
    • H01M50/188Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention relates to the technical field of welding-free battery cell cover plates, and discloses a welding-free sealed battery cell cover plate, which comprises a sealing ring, a cover plate body, pole pieces and a rubber layer, wherein a rubber groove and a sealing groove are formed between the cover plate body and the pole pieces, the rubber groove and the sealing groove are in up-down correspondence and are communicated, the rubber layer is arranged in the rubber groove, the density ring is arranged in the sealing groove, the rubber layer and the sealing ring are respectively sleeved with the pole pieces, and the rubber layer and the sealing ring are in up-down abutting arrangement; the cover plate body is provided with a bending part which is arranged towards the rubber layer in a bending way, the bending part is used for limiting the rubber layer to be separated from the rubber groove, and the rubber layer and the sealing ring synchronously play a sealing role. Under the cooperation of the sealing ring and the rubber layer, the sealing effect is achieved, and the bending part enhances the assembling stability among the cover plate body, the sealing ring, the rubber layer and the pole piece; the assembly of the battery cell cover plate is realized without welding, the assembly steps are simplified, the assembly efficiency of the battery cell cover plate is improved, and the assembly among the sealing ring, the cover plate body and the pole piece is convenient.

Description

Welding-free sealed type battery cell cover plate
Technical Field
The invention relates to the technical field of welding-free battery cell cover plates, in particular to a welding-free sealed battery cell cover plate.
Background
The cell is provided with a device for converting chemical energy into electric energy, and is provided with a positive electrode and a negative electrode; are commonly used for electrical energy supply.
At present, the electric core includes apron, electric core, positive pole post and negative pole post etc. and positive pole post and negative pole post run through the apron respectively and arrange, and the inner of positive pole post and the inner of negative pole post extends to the outside of apron respectively with electric core is the switch-on arrangement, and the outer end of positive pole post and the outer end of negative pole post are used for being connected with external component, realize external power supply.
In the prior art, the cover plate is assembled with the positive pole post and the negative pole post in a welding mode, the procedures are complex, welding seams are easy to remain, the appearance is influenced, and in addition, the assembly efficiency is low due to the adoption of the welding mode.
Disclosure of Invention
The invention aims to provide a welding-free sealed type battery cell cover plate, and aims to solve the problem of low assembly efficiency of the battery cell cover plate in the prior art.
The invention discloses a welding-free sealed battery cell cover plate, which is realized by the following steps that the welding-free sealed battery cell cover plate comprises a sealing ring, a cover plate body, a pole piece and a rubber layer, wherein a rubber groove and a sealing groove are formed between the cover plate body and the pole piece, the rubber groove and the sealing groove are in up-down corresponding and communicated arrangement, the rubber layer is arranged in the rubber groove, the density ring is arranged in the sealing groove, the rubber layer and the sealing ring are respectively sleeved with the pole piece, and the rubber layer and the sealing ring are in up-down abutting arrangement; the cover plate body is provided with a bending part, the bending part is bent towards the rubber layer, the bending part is used for limiting the rubber layer to be separated from the rubber groove, and the rubber layer and the sealing ring synchronously play a sealing role.
Further, the cover plate body is provided with a straight-down through groove and a straight-up through groove, the straight-up through groove and the straight-down through groove are in up-down correspondence and are communicated, and the diameter value of the straight-up through groove is larger than that of the straight-down through groove; the sealing washer includes sealed section, well sealed section and lower sealed section, the both ends of well sealed section respectively with go up sealed section with sealed section down is butt joint and integrative arranging, sealed section inlays down and establishes directly link up the groove and arrange under, directly link up the groove under have the cell wall under, directly link up the cell wall and encircle the cover and establish sealed section arranges down, directly go up and link up the groove and have directly on the base groove and directly go up the cell wall, well sealed section tiling is contradicted directly on the base groove is arranged, directly go up the cell wall and encircle the cover and establish go up the sealed section is arranged.
Further, the pole piece comprises a positive pole and a negative pole, the positive pole and the negative pole are correspondingly arranged, the positive pole and the negative pole respectively penetrate through the cover plate body, and the positive pole and the negative pole are respectively and electrically connected with the battery cell; the positive pole runs through the straight-down through groove and the straight-up through groove, the outer edge of the positive pole forms a positive edge part, the positive edge part is in annular arrangement, the positive edge part is in the straight-up through groove arrangement, the positive edge part and the straight-up groove wall clamp the upper seal section arrangement, and the positive edge part and the straight-up groove clamp the middle seal section arrangement.
Further, the positive pole comprises a positive pole head and a positive embedded head, the positive pole head forms the positive edge part, the lower part of the positive pole head and the upper part of the positive embedded head are in butt joint arrangement, the lower part of the positive pole head is embedded with the positive upper through groove arrangement, the positive embedded head is embedded with the positive lower through groove arrangement, and the positive embedded head and the positive lower groove wall clamp are arranged in the lower sealing section.
Further, the cover plate body is provided with a positive resistance ring, the positive resistance ring is annularly arranged, the positive lower groove wall surrounds the positive resistance ring, and the positive lower groove wall and the positive resistance ring are in butt joint; the lower sealing section is in up-down abutting arrangement with the positive resistance ring; the positive resistance ring is provided with a positive resistance surface, the positive resistance surface is horizontally arranged, a lower sealing surface is formed at the bottom of the lower sealing section, and the lower sealing surface and the positive resistance surface are vertically laminated.
Further, the bending part comprises a lower bending section and an upper bending section, the upper bending section and the lower bending section are respectively arranged in a ring shape, the upper bending section and the lower bending section respectively surround the pole piece, and the upper bending section and the lower bending section are in butt joint up and down and are integrally arranged; the lower folding section is longitudinally extended along the direction deviating from the cover plate body, and the upper folding section is horizontally extended along the direction facing the rubber layer until the upper folding section is pressed against the rubber layer.
Further, the rubber layer comprises an inner rubber section and an outer rubber section, the lower portion of the inner rubber section is arranged in a sleeved mode, the inner rubber section and the outer rubber section are arranged in an integrated mode, the upper folded section and the outer rubber section are arranged in an up-down pressing mode, and the upper folded section and the pole piece clamp the inner rubber section.
Further, the top of the upper seal segment forms an upper seal surface that forms a defined groove that is downwardly recessed; the outer glue section is provided with an outer protruding portion, the outer protruding portion is arranged in a downward protruding mode, the outer protruding portion is embedded in the limiting groove, and the outer protruding portion fully occupies the limiting groove.
Further, the kink is including enclosing the fender section, enclose the fender section and be annular arrangement, enclose the lower part of fender section with it is butt joint and integrated into one piece to go up the section of folding, enclose the upper portion of fender section along deviating from it arranges to go up the longitudinal extension of section direction, enclose the section of gluing in enclosing and arrange, enclose the fender section with the utmost point post spare centre gripping the section of gluing is arranged.
Further, the kink includes a plurality of division boards, the upper portion of division board with go up the section of folding is connected and integrated into one piece arranges, each the division board is interval sequential arrangement, adjacent form the separating groove between the division board, the outer section of gluing is filled each the separating groove is arranged.
Compared with the prior art, when the welding-free sealed battery cell cover plate is assembled, the sealing ring, the cover plate body and the pole piece are oppositely placed in the jig, at the moment, the pole piece penetrates through the cover plate body, the sealing ring is arranged in the sealing groove, then the bending part is formed through riveting, and then the rubber layer is formed through injection molding towards the rubber groove; under the double matching action of the sealing ring and the rubber layer, the sealing effect is achieved; under the action of the bending part, the assembling stability among the cover plate body, the sealing ring, the rubber layer and the pole piece is enhanced; moreover, by adopting the assembly mode, the assembly of the battery cell cover plate can be realized without welding, the assembly steps of the battery cell cover plate are simplified, the assembly efficiency of the battery cell cover plate is improved, and the assembly among the sealing ring, the cover plate body and the pole piece is greatly facilitated.
Drawings
FIG. 1 is a schematic view of a section B of a welding-free sealed cell cover plate provided by the invention;
FIG. 2 is a schematic top view of a soldering-free sealed cell cover plate provided by the present invention;
FIG. 3 is an enlarged schematic view of part A of the welding-free sealed cell cover plate provided by the invention;
FIG. 4 is a schematic partial cross-sectional view of a weld-free sealed cell cover plate provided by the present invention;
fig. 5 is an enlarged schematic view of a C portion of the welding-free sealed battery cell cover plate provided by the invention;
Fig. 6 is an enlarged schematic view of a portion C of another embodiment of a soldering-free sealed battery cell cover plate provided by the present invention;
Fig. 7 is a schematic front view in cross section of a welding-free sealed cell cover plate provided by the invention;
FIG. 8 is a schematic cross-sectional view of the seal ring and rubber layer of the welding-free sealed cell cover plate provided by the invention;
FIG. 9 is a schematic cross-sectional view of a seal ring and a rubber layer of another embodiment of a welding-free sealed cell cover plate provided by the invention;
fig. 10 is a schematic layout section of a partition plate of a welding-free sealed cell cover plate provided by the invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The implementation of the present invention will be described in detail below with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-10, a preferred embodiment of the present invention is provided.
The welding-free sealed battery cell cover plate comprises a sealing ring 3, a cover plate body 1, a pole piece 2 and a rubber layer 4, wherein a rubber groove and a sealing groove are formed between the cover plate body 1 and the pole piece 2, the rubber groove and the sealing groove are in up-down correspondence and are in communication arrangement, the rubber layer 4 is in rubber groove arrangement, the density ring is in sealing groove arrangement, the rubber layer 4 and the sealing ring 3 are respectively sleeved with the pole piece 2 to be arranged, and the rubber layer 4 and the sealing ring 3 are in up-down abutting arrangement; the cover plate body 1 is provided with a bending part 11, the bending part 11 is arranged towards the rubber layer 4 in a bending way, the bending part 11 is used for limiting the rubber layer 4 to be separated from the rubber groove, and the rubber layer 4 and the sealing ring 3 synchronously play a sealing role.
When the welding-free sealed battery cell cover plate is assembled, the sealing ring 3, the cover plate body 1 and the pole piece 2 are oppositely placed in the jig, at the moment, the pole piece 2 penetrates through the cover plate body 1, the sealing ring 3 is arranged in the sealing groove, then the bending part 11 is formed through riveting, and the rubber layer 4 is formed through injection molding towards the rubber groove; under the double matching action of the sealing ring 3 and the rubber layer 4, the sealing effect is achieved; under the action of the bending part 11, the assembling stability among the cover plate body 1, the sealing ring 3, the rubber layer 4 and the pole piece 2 is enhanced; moreover, by adopting the assembly mode, the assembly of the battery cell cover plate can be realized without welding, the assembly steps of the battery cell cover plate are simplified, the assembly efficiency of the battery cell cover plate is improved, and the assembly among the sealing ring 3, the cover plate body 1 and the pole piece 2 is greatly facilitated.
The cover plate body 1 is provided with a straight-down through groove 13 and a straight-up through groove 12, the straight-up through groove 12 and the straight-down through groove 13 are in up-down correspondence and are communicated, and the diameter value of the straight-up through groove 12 is larger than that of the straight-down through groove 13; the pole piece 2 is convenient to be matched with the cover plate body 1.
The sealing ring 3 comprises an upper sealing section 31, a middle sealing section 32 and a lower sealing section 33, wherein two ends of the middle sealing section 32 are respectively in butt joint with the upper sealing section 31 and the lower sealing section 33 and are integrally arranged, the lower sealing section 33 is embedded with a right-lower through groove 13, the right-lower through groove 13 is provided with a right-lower groove wall, the right-lower groove wall is sleeved with the lower sealing section 33 in a surrounding manner, the right-upper through groove 12 is provided with a right-upper groove and a right-upper groove wall, the middle sealing section 32 is in tiling contact with the right-upper groove in a abutting manner, and the right-upper groove wall is sleeved with the upper sealing section 31 in a surrounding manner; in this way, the sealing effect is ensured under the cooperation of the upper sealing section 31, the middle sealing section 32 and the lower sealing section 33.
The pole piece 2 comprises a positive pole 21 and a negative pole 22, the positive pole 21 and the negative pole 22 are correspondingly arranged, the positive pole 21 and the negative pole 22 respectively penetrate through the cover plate body 1, and the positive pole 21 and the negative pole 22 are respectively and electrically connected with the battery cell; the battery core is matched with the positive pole 21 and the negative pole 22 to realize external power supply.
The positive pole 21 penetrates through the directly-lower through groove 13 and the directly-upper through groove 12, the outer edge of the positive pole 21 forms a positive edge part which is annularly arranged, the positive edge part is arranged in the directly-upper through groove 12, the positive edge part and the directly-upper groove wall clamp upper sealing section 31 are arranged, and the positive edge part and the directly-upper bottom groove clamp middle sealing section 32 are arranged; under the cooperation of positive edge portion and positive cell wall, the setting steadiness of reinforcing upper seal section 31, simultaneously, guarantee the sealed effect of upper seal section 31.
The positive pole 21 comprises a positive pole head and a positive embedded head, the positive pole head forms a positive edge part, the lower part of the positive pole head is in butt joint arrangement with the upper part of the positive embedded head, the lower part of the positive pole head is embedded with a positive upper through groove 12, the positive embedded head is embedded with a positive lower through groove 13, and the positive embedded head and a positive lower groove wall clamp lower sealing section 33 are arranged; under the cooperation of the embedded head and the groove wall under, the setting stability of the lower sealing section 33 is enhanced, and meanwhile, the sealing effect of the lower sealing section 33 is ensured.
The positive pole head and the positive embedded head are arranged in an integrated manner, so that the positive pole column 21 and the cover plate body 1 are convenient to assemble.
The cover plate body 1 is provided with a positive resistance ring 14, the positive resistance ring 14 is annularly arranged, the positive lower groove wall surrounds the positive resistance ring 14, and the positive lower groove wall is in butt joint with the positive resistance ring 14; the lower sealing section 33 is arranged in an up-down abutting manner with the positive resistance ring 14; the positive resistance ring 14 has a positive resistance surface which is horizontally arranged, and the bottom of the lower sealing section 33 forms a lower sealing surface which is vertically attached to the positive resistance surface.
Thus, when assembling, the setting position of the sealing ring 3 is positioned under the action of the positive resistance ring 14, so that the correct setting of the sealing ring 3 is ensured, and the sealing effect of the sealing ring 3 is ensured.
The positive resistance surface synchronously supports the rubber layer 4 and the positive embedded head, so that the positive resistance ring 14 plays a role in positioning and supporting the placement of the positive pole 21.
The negative pole 22 penetrates through the negative lower through groove and the negative upper through groove, the outer edge of the negative pole 22 forms a negative edge part which is annularly arranged, the negative edge part is arranged in the negative upper through groove, the negative edge part and the negative upper groove wall clamp the upper sealing section 31, and the negative edge part and the negative upper groove clamp the middle sealing section 32; under the cooperation of the negative edge part and the negative upper groove wall, the setting stability of the upper sealing section 31 is enhanced, and meanwhile, the sealing effect of the upper sealing section 31 is ensured.
The negative pole 22 comprises a negative pole head and a negative embedded head, the negative pole head forms a negative edge part, the lower part of the negative pole head is in butt joint with the upper part of the negative embedded head, the lower part of the negative pole head is embedded with a negative upper through groove, the negative embedded head is embedded with a negative lower through groove, and the negative embedded head and the negative lower groove wall clamp a lower sealing section 33; under the cooperation of the negative embedded head and the negative lower groove wall, the setting stability of the lower sealing section 33 is enhanced, and meanwhile, the sealing effect of the lower sealing section 33 is ensured.
The negative electrode head and the negative embedded head are integrally formed and arranged, so that the negative electrode column 22 and the cover plate body 1 are convenient to assemble.
The cover plate body 1 is provided with a negative resistance ring which is annularly arranged, the negative lower groove wall surrounds the negative resistance ring, and the negative lower groove wall and the negative resistance ring are in butt joint; the lower sealing section 33 is arranged in an up-down abutting manner with the negative resistance ring; the negative resistance ring is provided with a negative resistance surface which is horizontally arranged, a lower sealing surface is formed at the bottom of the lower sealing section 33, and the lower sealing surface and the negative resistance surface are vertically attached.
Therefore, when the assembly is carried out, the setting position of the sealing ring 3 is positioned under the action of the negative resistance ring, so that the correct setting of the sealing ring 3 is ensured, and the sealing effect of the sealing ring 3 is ensured.
The negative resistance surface synchronously supports the rubber layer 4 and the negative embedded head, so that the negative resistance ring plays a role in positioning and supporting the placement of the negative pole 22.
The bending part 11 comprises a lower bending section 112 and an upper bending section 111, the upper bending section 111 and the lower bending section 112 are respectively arranged in a ring shape, the upper bending section 111 and the lower bending section 112 are respectively arranged to surround the pole piece 2, and the upper bending section 111 and the lower bending section 112 are in butt joint up and down and are integrally arranged; the lower folded section 112 is longitudinally extended and arranged along the direction away from the cover plate body 1, and the upper folded section 111 is horizontally extended and arranged along the direction towards the rubber layer 4 until the upper folded section 111 is pressed against the rubber layer 4.
Like this, roll over section 112 and surround rubber layer 4, play fixed action to rubber layer 4, under the effect of roll over section 111, strengthen the setting steadiness of rubber layer 4, and effectively avoid rubber layer 4 to break away from the rubber groove, ensure the sealed effect of rubber layer 4.
The positive electrode pole comprises two bending parts 11, wherein the two bending parts 11 are respectively and correspondingly arranged with a positive electrode pole 21 and a negative electrode pole 22; the bending part 11, the positive pole column 21, the rubber layer 4 and the sealing ring 3 are correspondingly arranged, and the bending part 11, the negative pole column 22, the rubber layer 4 and the sealing ring 3 are correspondingly arranged.
The rubber layer 4 comprises an inner rubber section 41 and an outer rubber section 42, the lower part of the inner rubber section 41 is sleeved on the outer rubber section 42, the inner rubber section 41 and the outer rubber section 42 are integrally formed, the upper folded section 111 and the outer rubber section 42 are in up-down pressing arrangement, and the upper folded section 111 and the pole piece 2 clamp the inner rubber section 41; under the cooperation of the upper folding section 111 and the outer rubber section 42, the setting stability of the rubber layer 4 is enhanced, and the sealing effect of the rubber layer 4 is effectively ensured.
The top of the upper seal segment 31 forms an upper seal surface that forms a defining groove disposed concave downward; the outer glue segment 42 has an outer flange 43, the outer flange 43 is arranged convexly downwards, the outer flange 43 is embedded with a limiting groove arrangement, and the outer flange 43 fully occupies the limiting groove arrangement; under the cooperation of outer protruding portion 43 and limiting groove, strengthen the cooperation between sealing washer 3 and the rubber layer 4, strengthen the setting steadiness of sealing washer 3 and rubber layer 4, and effectively ensure sealed effect.
The bending part 11 comprises a surrounding block section 113, the surrounding block section 113 is annularly arranged, the lower part of the surrounding block section 113 is in butt joint with the upper folding section 111 and integrally formed, the upper part of the surrounding block section 113 is longitudinally extended and arranged along the direction away from the upper folding section 111, the surrounding block section 113 is arranged to surround the inner rubber section 41, and the surrounding block section 113 and the pole piece 2 clamp the inner rubber section 41; under the effect of enclosing the fender section 113, increase the conflict area of kink 11 and rubber layer 4, the setting steadiness of reinforcing rubber layer 4 to and ensure the sealed effect of rubber layer 4, simultaneously, under the effect of enclosing the fender section 113, the design of rubber layer 4 of being convenient for.
When the riveting operation is carried out, the jig clamps and fixes the lower folding section 112 and the upper folding section 111 respectively, then the surrounding baffle section 113 is formed by riveting through the riveting piece, and then the upper folding section 111 is formed by riveting; at this time, a rubber groove is formed between the pole piece 2 and the bending section, a rubber layer 4 is formed towards the rubber groove by injection molding, the tightness is ensured, and the assembly between the pole piece 2 and the cover plate body 1 is realized.
The bending part 11 comprises a plurality of partition plates 114, the upper parts of the partition plates 114 are connected with the upper folding sections 111 and are integrally formed, the partition plates 114 are sequentially arranged at intervals, separation grooves are formed between adjacent partition plates 114, and the outer glue sections 42 are filled in the separation grooves; thus, the relative stability of the outer rubber section 42 and the bending part 11 is enhanced, the setting stability of the rubber layer 4 is improved, the deflection of the rubber layer 4 is avoided, and the sealing effect of the rubber layer 4 is effectively ensured.
The positive edge part is provided with a positive edge surface which is horizontally arranged and is pressed against the bottom surface of the inner adhesive section 41 and the bottom surface of the outer adhesive section 42; the front surface is provided with a plurality of convex particles, the convex particles are arranged in a convex way towards the direction of the rubber layer 4, and the convex embedded rubber layer 4 is arranged; thus, the relative stability between the rubber layer 4 and the positive pole 21 is enhanced, the setting stability of the rubber layer 4 is improved, the deflection of the rubber layer 4 is avoided, and the sealing effect of the rubber layer 4 is effectively ensured.
The negative edge part is provided with a negative edge surface which is horizontally arranged and is pressed against the bottom surface of the inner adhesive section 41 and the bottom surface of the outer adhesive section 42; the negative edge surface is provided with a plurality of convex particles, the convex particles are arranged in a convex way towards the direction of the rubber layer 4, and the convex embedded rubber layer 4 is arranged; thus, the relative stability between the rubber layer 4 and the negative pole column 22 is enhanced, the setting stability of the rubber layer 4 is improved, the deflection of the rubber layer 4 is avoided, and the sealing effect of the rubber layer 4 is effectively ensured.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (7)

1. The welding-free sealed battery cell cover plate is characterized by comprising a sealing ring, a cover plate body, a pole piece and a rubber layer, wherein a rubber groove and a sealing groove are formed between the cover plate body and the pole piece, the rubber groove and the sealing groove are in up-down corresponding and communicated arrangement, the rubber layer is arranged in the rubber groove, the sealing ring is arranged in the sealing groove, the rubber layer and the sealing ring are respectively sleeved with the pole piece, and the rubber layer and the sealing ring are in up-down abutting arrangement; the cover plate body is provided with a straight-down through groove and a straight-up through groove, the straight-up through groove and the straight-down through groove are in up-down correspondence and are communicated, and the diameter value of the straight-up through groove is larger than that of the straight-down through groove; the sealing ring comprises an upper sealing section, a middle sealing section and a lower sealing section, wherein two ends of the middle sealing section are respectively in butt joint with the upper sealing section and the lower sealing section and are integrally arranged, the lower sealing section is embedded with the straight-down through groove, the straight-down through groove is provided with a straight-down groove wall, the straight-down groove wall is sleeved with the lower sealing section in a surrounding manner, the straight-down through groove is provided with a straight-up bottom groove and a straight-up groove wall, the middle sealing section is in tiling contact with the straight-up bottom groove in a abutting manner, and the straight-up groove wall is sleeved with the upper sealing section in a surrounding manner;
the cover plate body is provided with a bending part which is bent towards the rubber layer, the bending part is used for limiting the rubber layer to be separated from the rubber groove, and the rubber layer and the sealing ring synchronously play a sealing role; the bending part comprises a lower bending section and an upper bending section, the upper bending section and the lower bending section are respectively in annular arrangement, the upper bending section and the lower bending section respectively surround the pole piece, and the upper bending section and the lower bending section are in butt joint up and down and are integrally arranged; the rubber layer comprises an inner rubber section and an outer rubber section, the lower part of the inner rubber section is sleeved with the outer rubber section, the inner rubber section and the outer rubber section are integrally formed, the upper folded section and the outer rubber section are in up-down pressing arrangement, and the upper folded section and the pole piece clamp the inner rubber section; the kink is including enclosing the fender section, enclose the fender section and be annular arrangement, enclose the lower part of fender section with it is butt joint and integrated into one piece to go up the section and arrange to roll over, enclose the upper portion of fender section and follow and deviate from it arranges to roll over section direction longitudinal extension, enclose the section and enclose the interior section of gluing and arrange, enclose the fender section with the pole piece centre gripping the section of gluing is arranged.
2. The welding-free sealed cell cover plate of claim 1, wherein the pole piece comprises a positive pole and a negative pole, the positive pole and the negative pole are correspondingly arranged, the positive pole and the negative pole respectively penetrate through the cover plate body, and the positive pole and the negative pole are respectively and electrically connected with the cell; the positive pole runs through the straight-down through groove and the straight-up through groove, the outer edge of the positive pole forms a positive edge part, the positive edge part is in annular arrangement, the positive edge part is in the straight-up through groove arrangement, the positive edge part and the straight-up groove wall clamp the upper seal section arrangement, and the positive edge part and the straight-up groove clamp the middle seal section arrangement.
3. The welding-free sealed cell cover plate of claim 2, wherein the positive post comprises a positive head and a positive embedded head, the positive head forms the positive edge, the lower part of the positive head is in butt joint arrangement with the upper part of the positive embedded head, the lower part of the positive head is embedded with the positive upper through groove, the positive embedded head is embedded with the positive lower through groove, and the positive embedded head and the positive lower groove wall clamp the lower sealing section.
4. The solderless sealed cell cover plate of claim 3, wherein the cover plate body has a positive resistance ring, the positive resistance ring is annularly arranged, the positive lower groove wall surrounds the positive resistance ring, and the positive lower groove wall is in butt joint arrangement with the positive resistance ring; the lower sealing section is in up-down abutting arrangement with the positive resistance ring; the positive resistance ring is provided with a positive resistance surface, the positive resistance surface is horizontally arranged, a lower sealing surface is formed at the bottom of the lower sealing section, and the lower sealing surface and the positive resistance surface are vertically laminated.
5. The weld-free sealed cell cover of any one of claims 1-4, wherein the lower folded section is disposed longitudinally extending away from the cover body and the upper folded section is disposed horizontally extending toward the rubber layer until the upper folded section is disposed against the rubber layer.
6. The solderless sealed cell cover plate of claim 1, wherein a top portion of the upper seal segment forms an upper seal surface, the upper seal surface forming a defined groove, the defined groove being disposed concave downward; the outer glue section is provided with an outer protruding portion, the outer protruding portion is arranged in a downward protruding mode, the outer protruding portion is embedded in the limiting groove, and the outer protruding portion fully occupies the limiting groove.
7. The welding-free sealed cell cover plate of claim 6, wherein the bending portion comprises a plurality of separation plates, the upper portions of the separation plates are connected with the upper folding sections and are integrally formed, the separation plates are arranged in a spaced sequence, separation grooves are formed between adjacent separation plates, and the outer glue sections fill the separation grooves.
CN202111252768.4A 2021-10-27 2021-10-27 Welding-free sealed type battery cell cover plate Active CN114006094B (en)

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