CN220856717U - Battery cover plate and battery - Google Patents
Battery cover plate and battery Download PDFInfo
- Publication number
- CN220856717U CN220856717U CN202322050479.7U CN202322050479U CN220856717U CN 220856717 U CN220856717 U CN 220856717U CN 202322050479 U CN202322050479 U CN 202322050479U CN 220856717 U CN220856717 U CN 220856717U
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- Prior art keywords
- cover plate
- battery
- pole
- hole
- insulating
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- 238000002347 injection Methods 0.000 claims abstract description 51
- 239000007924 injection Substances 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 29
- 230000000694 effects Effects 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000001746 injection moulding Methods 0.000 abstract description 8
- 238000009413 insulation Methods 0.000 abstract description 7
- 239000003792 electrolyte Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 12
- 239000012212 insulator Substances 0.000 description 11
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
Abstract
In order to solve the problems of complex structure, multiple parts and complex processing process flow of the existing battery cover plate, the utility model provides a battery cover plate, which comprises a cover plate body, a polar column and an insulating part, wherein the insulating part is arranged between the polar column and the cover plate body and used for isolating the polar column from the cover plate body to avoid contact, and a liquid injection hole is arranged on the polar column; according to the utility model, the insulating piece is filled between the pole and the cover plate body in an injection molding mode, so that the effect of insulation is achieved, the pole and the cover plate body are connected into a whole, the pole and the cover plate body are prevented from being twisted relatively in the using process, the related anti-twisting structure is reduced, the parts and the related processing technological process are saved, and the safety usability of the battery cover plate is improved; on the other hand, the pole is provided with the liquid injection hole, so that the corrosion to the battery shell is avoided, the corrosion to the pole is small, and the service life of the battery is ensured; and reduces the cost of the battery.
Description
Technical Field
The utility model relates to the field of batteries, in particular to a battery cover plate and a battery.
Background
With the continuous expansion of new energy industry, lithium ion batteries are widely used as an important component of new energy industry. The square aluminum shell lithium ion battery is widely applied to the fields of power and energy storage batteries because of simple structure, higher energy density and high safety performance. However, the existing battery cover plate has a complex structure, a plurality of parts and a complex processing process flow; therefore, how to overcome the above-mentioned technical problems and drawbacks becomes an important problem to be solved.
Disclosure of utility model
Aiming at the problems of complex structure, multiple parts and complex processing process flow of the existing battery cover plate, the utility model provides a battery cover plate and a battery.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
In one aspect, the utility model provides a battery cover plate for closing a battery housing to form a battery, the battery cover plate comprises a cover plate body, a pole and an insulating member, the cover plate body is provided with a first through hole, the pole is embedded into the first through hole, the insulating member is arranged between the pole and the cover plate body and used for isolating the contact between the pole and the cover plate body, the pole is provided with a liquid injection hole, and the liquid injection hole is communicated with the inside of the battery housing.
Optionally, the thickness of the pole is greater than or equal to 4mm, the pole comprises a connecting part and an extending part, the connecting part is positioned at the first end of the pole, and the extending part is positioned at the second end of the pole; the connecting portion penetrates through the first through hole, and the first end of the connecting portion and the second end of the connecting portion are located at two sides of the first through hole respectively.
Optionally, the insulating piece includes first insulating piece, second insulating piece and third insulating piece, first insulating piece the second insulating piece with the third insulating piece is cyclic annular structure, first insulating piece the second insulating piece with third insulating piece integrated into one piece, first insulating piece with the third insulating piece is located respectively the both ends of second insulating piece, just first insulating piece with the external diameter of third insulating piece is all greater than the external diameter of second insulating piece.
Optionally, the first insulating member is disposed on at least a part of the surface of the first end of the connecting portion protruding from the first through hole and covers a part of the surface of the first end of the cover body; the second insulating piece is arranged between the outer side of the connecting part and the inner side of the first through hole and used for isolating the pole from contacting with the first through hole; the third insulating piece is arranged outside the second end of the pole protruding out of the first through hole and covers part of the surface of the second end of the cover plate body.
Optionally, the liquid injection hole is communicated with two sides of the connecting part, a welding area is arranged on the outer side of the extending part, and the welding area is used for welding with the battery cell tab.
Optionally, the device further comprises a cone sealing plug, wherein the cone sealing plug is embedded into the liquid injection hole to seal the liquid injection hole.
Optionally, the device further comprises a ball sealing plug, wherein the ball sealing plug is embedded into the liquid injection hole to seal the liquid injection hole.
Optionally, a single battery cover plate is provided with a single pole, a single insulator, a single first through hole and a single liquid injection hole.
Optionally, two or more than two posts, two or more than two insulating pieces, two or more than two first through holes and two or more than two liquid injection holes are arranged on the single battery cover plate, and the two or more than two posts, the two or more than two insulating pieces, the two or more than two first through holes and the two or more than two liquid injection holes are arranged in a one-to-one correspondence.
In another aspect, the utility model provides a battery comprising the battery cover plate.
Compared with the prior art, the battery cover plate provided by the utility model has the following main effects:
(1) According to the utility model, the insulation piece is arranged in the first through hole, so that the pole and the cover plate body are isolated, the contact between the pole and the cover plate body is avoided, and the technical effect of insulation is achieved on the pole and the cover plate body;
(2) The insulating piece is filled between the pole and the cover plate body in an injection molding mode, the pole and the cover plate body are connected into a whole, the pole and the cover plate body are prevented from being twisted relatively in the using process, and the related anti-twisting structure is reduced;
(3) The arrangement of the insulating part not only has the technical effect of insulating the polar post and the cover plate body, but also connects the polar post and the cover plate body into a whole to have the technical effect of anti-torsion structure, so that the arrangement of the insulating part reduces the use of the insulating part and/or the anti-torsion structure, and the battery cover plate has the advantages of simple structure, few adopted parts, simple processing method, low processing cost, saving parts and related processing technological processes and good use effect;
(4) The two-side epitaxial structure of the cover plate body can be bonded with the battery shell in a sealing manner through welding, so that the tightness and the safety of the battery are ensured, and the safety use performance of the battery cover plate is improved;
(5) The electrolyte is injected through the electrolyte injection hole, so that the electrolyte has stronger corrosiveness, and the electrolyte resistance of the electrode is stronger than that of the battery shell; on the other hand, the price of the material with strong corrosion resistance is high, the volume of the battery pole is smaller than that of the battery shell, and the battery pole adopts the material with strong corrosion resistance of electrolyte resistance, so that the cost of the battery is reduced.
Drawings
Fig. 1 is a schematic structural view of a battery cover plate according to an embodiment of the present utility model;
FIG. 2 is an exploded view of a battery cover plate according to an embodiment of the present utility model;
FIG. 3 is a schematic top view of a battery cover plate according to an embodiment of the present utility model;
FIG. 4 is a first cross-sectional schematic view of A-A of FIG. 3;
FIG. 5 is a second cross-sectional schematic view of A-A of FIG. 3;
Fig. 6 is a schematic structural view of a battery cover plate according to another embodiment of the present utility model;
fig. 7 is a schematic structural view of a battery cover plate according to still another embodiment of the present utility model;
reference numerals in the drawings of the specification are as follows:
1-a cover plate body; 11-a first through hole; 2-pole; 21-a connection; 22-extensions; 23-a liquid injection hole; 24-cone sealing plugs; 25-ball sealing plug; 3-an insulator; 31-a first insulating member; 32-a second insulator; 33-third insulation.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. 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 utility model.
In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "side", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-2, in an embodiment, the present utility model provides a battery cover for closing a battery case to form a battery, the battery cover includes a cover body 1, a post 2, and an insulating member 3, a first through hole 11 is provided on the cover body 1, the post 2 is embedded in the first through hole 11, the insulating member 3 is disposed between the post 2 and the cover body 1 to isolate the post 2 from contacting the cover body 1, a liquid injection hole 23 is provided on the post 2, and the liquid injection hole 23 communicates with the inside of the battery case.
In some embodiments, the insulator 3 is disposed in the first through hole 11 to isolate the pole 2 from the cover plate body 1, so as to avoid contact, and the insulator 3 of the present utility model is filled between the pole 2 and the cover plate body 1 in an injection molding manner, so that not only is an isolating and insulating effect achieved, but also the pole 2 and the cover plate body 1 are connected into a whole, so that the pole 2 and the cover plate body 1 are prevented from being twisted relatively during use, the related anti-twisting structure is reduced, and components and related processing technological processes are saved, thereby improving the safe use performance of the battery cover plate.
Further, in an embodiment, by arranging the liquid injection hole 23 on the pole 2, and injecting the electrolyte through the liquid injection hole 23, the electrolyte has stronger corrosiveness, and since the corrosiveness of the electrolyte resistance of the pole 2 is stronger than that of the electrolyte resistance of the battery case, on one hand, when the electrolyte is injected through the liquid injection hole 23 on the battery pole 2, the battery case is not corroded, and the corrosion to the pole 2 is smaller, so that the service life of the battery is ensured; on the other hand, the price of the material with strong corrosion resistance is high, the volume of the battery pole 2 is smaller than that of the battery shell, and the battery pole 2 is made of the material with strong corrosion resistance of electrolyte resistance, so that the cost of the battery is reduced.
In an embodiment, the thickness direction of the battery cell is taken as the width direction of the cover plate body 1, and the width direction of the battery cell is taken as the length direction of the cover plate body 1; taking the length direction of the battery cell as the thickness direction of the cover plate body 1; the width of the cover plate body 1 is 0.5-100mm, and the length of the cover plate body 1 is 20-500mm; the thickness of the cover plate body 1 is 2-20mm;
In a preferred embodiment, the width of the cover plate body 1 is 3-50mm, and the length of the cover plate body 1 is 20-250mm; the thickness of the cover plate body 1 is 3-10mm;
Further, along the length direction of the cover plate body 1, the width of the cover plate body 1 of the utility model gradually decreases from the middle to the two ends; since the cover body 1 is welded to the battery case, the welded seal line is to be transferred from the cover body 1 to the battery case. The width of the cover plate body 1 is gradually reduced from the middle to the two ends, so that the sealing of the transition area is facilitated; the two-side epitaxial structure of the cover plate body can be bonded with the battery shell in a welding sealing manner, so that the tightness and safety of the battery are ensured, and the safety use performance of the battery cover plate is improved.
As shown in fig. 2, in an embodiment, the thickness of the pole 2 is greater than or equal to 4mm, the pole 2 includes a connection portion 21 and an extension portion 22, the connection portion 21 is located at a first end of the pole 2, and the extension portion 22 is located at a second end of the pole 2; the connecting portion 21 penetrates through the first through hole 11, and the first end of the connecting portion 21 and the second end of the connecting portion 21 are located at two sides of the first through hole 11, respectively.
Specifically, the thickness of the pole 2 is greater than or equal to 4mm, so that the electrolyte injection hole 23 is conveniently arranged on the pole 2, and electrolyte is injected through the electrolyte injection hole 23.
Further, the thickness of the connecting portion 21 is greater than the depth of the first through hole 11 along the direction from the battery cover plate to the battery housing, and when the battery cover plate is mounted, the connecting portion 21 penetrates through the first through hole 11, the first end of the connecting portion 21 and the second end of the connecting portion 21 are located at two sides of the first through hole 11 respectively, so that the outer wall of the connecting portion 21 is connected with the upper surface, the lower surface and the inner wall of the first through hole 11 of the cover plate body 1 through the insulating member 3 respectively, the contact area of the insulating member 3 with the connecting portion 21 and the cover plate body 1 is increased, the connection strength of the connecting portion 21 and the cover plate body 1 is improved, the pole 2 and the cover plate body 1 are connected into a whole, relative torsion of the pole 2 and the cover plate body 1 in the using process is avoided, the relative torsion preventing structure is reduced, parts and the relative processing technology are saved, and the safe use performance of the battery cover plate is improved.
As shown in fig. 2, in an embodiment, the insulating member 3 includes a first insulating member 31, a second insulating member 32, and a third insulating member 33, where the first insulating member 31, the second insulating member 32, and the third insulating member 33 are all in a ring structure, the first insulating member 31, the second insulating member 32, and the third insulating member 33 are integrally formed, the first insulating member 31 and the third insulating member 33 are respectively located at two ends of the second insulating member 32, and outer diameters of the first insulating member 31 and the third insulating member 33 are larger than outer diameters of the second insulating member 32.
In some embodiments, the insulating member 3 is selected from PPS material, PBT material, PPA material, and the like.
In some preferred embodiments, the insulating member 3 is selected from PPS materials. The PPS material has good heat resistance, excellent electrical property, excellent mechanical property and good flame retardant property; and the insulating member 3 made of PPS material has good dimensional stability.
As shown in fig. 2, in an embodiment, the first insulating member 31 is disposed on at least a part of the surface of the connecting portion 21 protruding from the first end of the first through hole 11 and covers a part of the surface of the first end of the cover body 1; the second insulator 32 is disposed between the outside of the connection portion 21 and the inside of the first through hole 11 to isolate the contact between the post 2 and the first through hole 11; the third insulating member 33 is disposed outside the second end of the connecting portion 21 protruding from the first through hole 11 and covers a portion of the surface of the second end of the cap body 1.
As shown in fig. 1, in an embodiment, the thickness of the first insulating member 31 is equal to the length of the connecting portion 21 protruding from the first end of the first through hole 11; the first end of the first insulating member 31 is located on the same surface as the first end of the connecting portion 21.
As shown in fig. 6, in an embodiment, the thickness of the first insulating member 31 is smaller than the length of the connecting portion 21 protruding from the first end of the first through hole 11; the first end of the first insulating member 31 is lower than the first end of the connecting portion 21, and the first end of the connecting portion 21 protrudes from the first end of the first insulating member 31.
Specifically, the first insulating member 31 is injection molded outside the first end of the first through hole 11 protruding from the connecting portion 21 in an injection molding manner, and the injection molding range is that the surface of the first end of the cover plate body 1 is injection molded and extends outwards along the outer periphery of the first end of the cover plate body 1, so that the surface of the first end of the cover plate body 1 and part of the outer side surface of the cover plate body 1 are injection molded, the outer side surface of the cover plate body 1 is injection molded, when the battery cover plate seals the battery housing, the cover plate body 1 is prevented from directly contacting the battery housing, and insulation is arranged between the cover plate body 1 and the battery housing.
Preferably, when the first insulating member 31 is injection-molded on the outer side surface of the cover body 1, the first insulating member 31 has a certain width on the outer side surface of the cover body 1; this width is advantageous on the one hand for ensuring the sealing connection effect thereof and on the other hand also for avoiding that too great a width would have an adverse effect on the connection of the battery cover plate to the battery housing.
Specifically, the second insulating member 32 fills the gap between the outside of the connecting portion 21 and the inside of the first through hole 11 by injection molding, so that the pole 2 and the cover body 1 are connected as a whole.
Specifically, the third insulating member 33 is injection molded outside the second end of the connecting portion 21 protruding out of the first through hole 11 in an injection molding manner and extends outward along the outer periphery of the second end of the cover plate body 1, so as to mold the surface of the second end of the cover plate body 1, and the thickness of the third insulating member 33 molded on the surface of the second end of the cover plate body 1 is smaller than the length of the connecting portion 21 protruding out of the second end of the first through hole 11.
Further, the thickness of the third insulating member 33 is smaller than the length of the connecting portion 21 protruding from the second end of the first through hole 11; the second end of the third insulating member 33 is higher than the second end of the pole 2, the second end of the pole 2 protrudes out of the second end of the third insulating member 33, a welding area is arranged at the second end of the pole 2, and the second end of the pole 2 is connected with the battery case in a sealing welding manner.
Specifically, the sealing welding mode includes, but is not limited to, welding modes including laser welding, electromagnetic pulse welding, resistance welding, electron beam welding and the like.
Through setting up first insulating part 31, second insulating part 32 with third insulating part 33 makes utmost point post 2 with apron body 1 connects as a whole, avoids utmost point post 2 in the in-process of using with apron body 1 takes place to twist reverse relatively, has reduced relevant anti-torsion structure, has saved part and relevant processing technology flow to the safe performance of battery apron has been improved.
As shown in fig. 2, in an embodiment, the liquid injection hole 23 communicates with two sides of the connection portion 21, and a welding area is disposed on the outer side of the extension portion 22, where the welding area is used for welding with the battery tab.
Specifically, the welding areas are disposed on both sides of the extension 22; the welding area is connected with the battery cell tab in a sealing welding mode.
Specifically, the sealing welding mode includes, but is not limited to, welding modes including laser welding, electromagnetic pulse welding, resistance welding, electron beam welding and the like.
As shown in fig. 4, in an embodiment, the device further includes a cone sealing plug 24, where the cone sealing plug 24 is embedded in the liquid injection hole 23 to seal the liquid injection hole 23.
Specifically, the liquid injection hole 23 is in an inverted cone shape, and the cone sealing plug 24 is selected to seal the liquid injection hole 23, so that a good sealing effect is achieved.
As shown in fig. 5, in an embodiment, the device further includes a ball sealing plug 25, and the ball sealing plug 25 is embedded in the liquid injection hole 23 to seal the liquid injection hole 23.
Specifically, the liquid injection hole 23 is in an inverted cone shape, the ball sealing plug 25 is selected to seal the liquid injection hole 23, and the surface of the ball sealing plug 25 is in an annular bulge so as to increase the limit area at the second end of the liquid injection hole 23, thereby reducing the possibility that the sealing plug is separated from the liquid injection hole 23 to the first end of the cover plate, and achieving a good sealing effect.
As shown in fig. 1 to 3, in an embodiment, a single battery cover plate is provided with a single pole 2, a single insulator 3, a single first through hole 11, and a single pouring hole 23.
Specifically, a single battery is provided with two battery cover plates, the two battery cover plates are respectively arranged at two ends of the battery shell, the battery cover plates at two ends are respectively provided with a pole post 2 which is respectively used as an anode and a cathode, and at the moment, a single first through hole 11 is positioned in the middle of the cover plate body 1; thereby, the cover plate body 1, the pole 2 and the insulator 3 are assembled in sequence to form the battery cover plate.
As shown in fig. 7, in an embodiment, two or more of the posts 2, two or more of the insulators 3, two or more of the first through holes 11, and two or more of the liquid injection holes 23 are disposed on a single battery cover plate, and the two or more of the posts 2, two or more of the insulators 3, two or more of the first through holes 11, and two or more of the liquid injection holes 23 are disposed in one-to-one correspondence.
Specifically, the battery casing is a semi-closed casing with one open end, the battery cover plate is closed the one open end of the battery casing, the left and right sides of the battery cover plate are respectively provided with a pole post 2, which is respectively used as an anode and a cathode, at this time, the first through holes 11 are positioned on the left and right sides of the cover plate body 1, so that the pole posts 2 and the insulating pieces 3 are assembled in sequence, and each pole post 2 is provided with a liquid injection hole 23, so that the battery cover plate is formed.
In another aspect, the utility model provides a battery comprising the battery cover plate.
In one embodiment, as shown in fig. 7, the battery case is a semi-closed case with one end open, and the battery cover assembly closes the one end open of the battery case.
In another embodiment, as shown in fig. 1, the battery case is a cylindrical case with two open ends, the number of the battery cover plates is 2, and two battery cover plates respectively close the two open ends of the battery case.
In some embodiments, the battery housing is a square housing, a cylindrical housing, a prismatic housing, or other irregular housing.
Compared with the prior art, the battery cover plate provided by the utility model has the following main effects:
(1) According to the utility model, the insulation piece 3 is arranged in the first through hole 11 of the cover plate body 1, so that the pole 2 is isolated from the cover plate body 1, the contact between the pole 2 and the cover plate body 1 is avoided, and the technical effect of insulation is achieved on the pole 2 and the cover plate body 1;
(2) The insulator 3 is filled between the pole 2 and the cover plate body 1 in an injection molding mode, the pole 2 and the cover plate body 1 are connected into a whole, the pole 2 and the cover plate body 1 are prevented from being twisted relatively in the using process, and the related anti-twisting structure is reduced;
(3) The arrangement of the insulating part 3 not only has the technical effect of insulating the pole 2 and the cover plate body 1, but also connects the pole 2 and the cover plate body 1 into a whole to have the technical effect of a torsion-preventing structure, so that the arrangement of the insulating part 3 reduces the use of the insulating part and/or the torsion-preventing structure, and the battery cover plate has the advantages of simple structure, few adopted parts, simple processing method, low processing cost, saving parts and related processing technological processes and good use effect;
(4) The two-side extension structure of the cover plate body 1 can be sealed and attached with the battery shell through welding, so that the tightness and the safety of the battery are ensured, and the safety use performance of the battery cover plate is improved;
(5) The electrolyte injection holes 23 are formed in the pole 2, electrolyte is injected through the electrolyte injection holes 23, and has strong corrosiveness, and the electrolyte resistance of the pole 2 is stronger than that of the battery shell, so that on one hand, when the electrolyte is injected through the electrolyte injection holes in the pole 2 of the battery, the battery shell cannot be corroded, and the corrosion to the pole is small, so that the service life of the battery is ensured; on the other hand, the price of the material with strong corrosion resistance is high, the volume of the battery pole 2 is smaller than that of the battery shell, and the battery pole 2 is made of the material with strong corrosion resistance of electrolyte resistance, so that the cost of the battery is reduced.
The foregoing description of the preferred embodiments of the utility model 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 utility model.
Claims (10)
1. A battery cover plate, characterized in that: the battery cover plate is used for sealing the battery shell to form a battery, the battery cover plate comprises a cover plate body, a pole and an insulating piece, a first through hole is formed in the cover plate body, the pole is embedded into the first through hole, the insulating piece is arranged between the pole and the cover plate body and used for isolating the pole from being contacted with the cover plate body, a liquid injection hole is formed in the pole, and the liquid injection hole is communicated with the inside of the battery shell.
2. The battery cover plate according to claim 1, wherein: the thickness of the pole is greater than or equal to 4mm, the pole comprises a connecting part and an extending part, the connecting part is positioned at the first end of the pole, and the extending part is positioned at the second end of the pole; the connecting portion penetrates through the first through hole, and the first end of the connecting portion and the second end of the connecting portion are located at two sides of the first through hole respectively.
3. The battery cover plate according to claim 2, wherein: the insulating part comprises a first insulating part, a second insulating part and a third insulating part, wherein the first insulating part, the second insulating part and the third insulating part are of annular structures, the first insulating part, the second insulating part and the third insulating part are integrally formed, the first insulating part and the third insulating part are respectively located at two ends of the second insulating part, and the outer diameters of the first insulating part and the third insulating part are both larger than the outer diameter of the second insulating part.
4. A battery cover plate according to claim 3, wherein: the first insulating piece is arranged on at least part of the surface of the first end of the connecting part protruding out of the first through hole and covers part of the surface of the first end of the cover plate body; the second insulating piece is arranged between the outer side of the connecting part and the inner side of the first through hole and used for isolating the pole from contacting with the first through hole; the third insulating piece is arranged outside the second end of the pole protruding out of the first through hole and covers part of the surface of the second end of the cover plate body.
5. The battery cover plate according to claim 2, wherein: the liquid injection holes are communicated with two sides of the connecting part, a welding area is arranged on the outer side of the extending part, and the welding area is used for welding with the battery cell electrode lug.
6. The battery cover plate according to claim 1, wherein: still include the cone sealing plug, the cone sealing plug embedding annotate in the liquid hole to annotate the liquid hole is sealed.
7. The battery cover plate according to claim 1, wherein: the device also comprises a ball sealing plug, wherein the ball sealing plug is embedded into the liquid injection hole to seal the liquid injection hole.
8. The battery cover plate according to claim 1, wherein: and a single pole, a single insulating piece, a single first through hole and a single liquid injection hole are arranged on the single battery cover plate.
9. The battery cover plate according to claim 1, wherein: the battery cover plate is provided with two or more than two pole posts, two or more than two insulating pieces, two or more than two first through holes and two or more than two liquid injection holes, and the two or more than two pole posts, the two or more than two insulating pieces, the two or more than two first through holes and the two or more than two liquid injection holes are arranged in a one-to-one correspondence mode.
10. A battery, characterized in that: a battery cover plate comprising the battery of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322050479.7U CN220856717U (en) | 2023-08-01 | 2023-08-01 | Battery cover plate and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322050479.7U CN220856717U (en) | 2023-08-01 | 2023-08-01 | Battery cover plate and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220856717U true CN220856717U (en) | 2024-04-26 |
Family
ID=90748238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322050479.7U Active CN220856717U (en) | 2023-08-01 | 2023-08-01 | Battery cover plate and battery |
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