CN103887453A - Lithium ion battery sealing structure and lithium ion battery - Google Patents

Lithium ion battery sealing structure and lithium ion battery Download PDF

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Publication number
CN103887453A
CN103887453A CN201210565041.6A CN201210565041A CN103887453A CN 103887453 A CN103887453 A CN 103887453A CN 201210565041 A CN201210565041 A CN 201210565041A CN 103887453 A CN103887453 A CN 103887453A
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China
Prior art keywords
sealing
lithium ion
ion battery
lead
perforate
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CN201210565041.6A
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CN103887453B (en
Inventor
杨珂利
王玲
蒋露霞
朱建华
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Huizhou BYD Battery Co Ltd
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Huizhou BYD Battery Co Ltd
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Priority to CN201210565041.6A priority Critical patent/CN103887453B/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
    • H01M50/60Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627Filling ports
    • H01M50/636Closing or sealing filling ports, e.g. using lids
    • 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
    • H01M50/30Arrangements for facilitating escape of gases
    • H01M50/317Re-sealable arrangements
    • H01M50/325Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
    • H01M50/333Spring-loaded vent valves
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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)
  • Filling, Topping-Up Batteries (AREA)

Abstract

The present invention provides a lithium ion battery sealing structure, which comprises a cover plate, a liquid injection hole arranged on the cover plate, and a check valve for sealing the liquid injection hole, wherein the check valve comprises a sealing shield having a cavity, a sealing column and a reset elastic member, the sealing column and the reset elastic member are arranged inside the cavity, the sealing shield covers the liquid injection hole, the sealing column comprises a sealing table and a first guide column, the sealing table is provided with a sealing ring, the sealing ring is provided for sealing a first opening hole on the sealing shield, the lower end of the sealing shield is arranged on the cover plate, one end of the reset elastic member bears against the lower portion of the sealing table, the other end of the reset elastic member bears against the cover plate, and the sealing ring is provided with a boss for sealing the first opening hole. The present invention further provides a lithium ion battery, wherein the sealing structure of the lithium ion battery is the lithium ion battery sealing structure provided by the present invention. The lithium ion battery sealing structure has characteristics of good sealing performance, simple operation, and no performance reduction during repeated use.

Description

A kind of lithium ion battery enclosuring structure and lithium ion battery thereof
Technical field
The invention belongs to electrokinetic cell field, relate in particular to a kind of enclosuring structure of lithium ion battery.
Background technology
Along with modern society's fast development, the non-renewable resources such as oil are day by day in short supply, and under the immense pressure of the limited energy, automobile industry starts sight to turn on electric automobile.Electrokinetic cell is the key of Development of Electric Vehicles.Because having, voltage is high, energy density is high, operating temperature range is wide, advantages of environment protection is used widely in electrokinetic cell field for lithium ion battery.Because lithium ion battery needs to inject electrolyte toward inside battery in process of production, then discharge inside battery gas through formation process.This sealing property after to battery liquid-filling, the smooth exhaust in formation process and changed into after sealing property higher requirement has been proposed.
What be applied at present battery seal is rubber tack.After fluid injection completes, rubber tack is inserted to sealing, front rubber tack is extracted to exhaust to changing into, after changing into, again rubber tack is inserted and sealed.There are many shortcomings in this operating process: easily occurs that seal failure, operating process are loaded down with trivial details, high in cost of production.Therefore, be badly in need of a kind of lithium ion battery enclosuring structure of design, to realize in ensureing fluid injection and exhaust, can also effectively stop extraneous moisture to enter inside battery, and simple to operate.
Summary of the invention
The present invention is while using rubber tack sealing liquid injection hole in solution prior art, complex operation while changing into, plug easily makes the technical problem of rubber tack sealing property variation repeatedly, lithium ion battery enclosuring structure and the lithium ion battery thereof of simple to operate when a kind of changing into is provided, good seal performance.
To achieve these goals, the invention provides a kind of lithium ion battery enclosuring structure, concrete technical scheme is as follows:
A kind of lithium ion battery enclosuring structure, comprises cover plate, liquid injection hole is on the cover board set and for sealing the unidirectional valve of described liquid injection hole, wherein,
Unidirectional valve comprises with the seal closure of cavity and is arranged on sealing column and the return springs in cavity.
Seal closure covers on described liquid injection hole, and seal closure upper end has the first perforate, lower end has the second perforate, and the first perforate is communicated with cavity, and the second perforate is communicated with cavity, and the second perforate is communicated with liquid injection hole.
Sealing column comprises sealing platform and is arranged on first lead on sealing platform top, the first lead extend out to outside seal closure through the first perforate, between the first lead and the first perforate, be provided with exhaust space, between sealing platform and the sidewall of cavity, be provided with exhaust space.
On sealing platform, be provided with the sealing ring for sealing the first perforate; On sealing ring, have through hole, the first lead extend out to outside seal closure through described through hole and the first perforate, between sealing ring and the sidewall of described cavity, is provided with exhaust space.
Above-mentioned sealing platform one end seals described the first perforate by sealing ring, and the other end props up cover plate by described return springs.
On above-mentioned sealing ring, be provided with the boss for sealing described the first perforate.
Further, above-mentioned sealing ring is provided with the sealing ring location division for locating around.
Further, above-mentioned sealing ring is provided with at least two sealing ring location divisions around, between adjacent two sealing ring location divisions, leaves exhaust clearance.
Preferably, above-mentioned sealing platform bottom is provided with the second lead.
Further, above-mentioned sealing platform is provided with the sealing platform location division for locating around.
Further, above-mentioned sealing platform is provided with at least two sealing platform location divisions around, between adjacent two sealing platform location divisions, leaves exhaust clearance.
Further, above-mentioned the first lead is provided with the first lead location division for locating around.
Further, above-mentioned the first lead is provided with at least two the first lead location divisions around, between adjacent two sealing platform location divisions, leaves exhaust clearance.
Further, above-mentioned the second lead is provided with the second lead location division for locating around.
Further, above-mentioned the second lead is provided with at least two the second lead location divisions around, between adjacent two second lead location divisions, leaves exhaust clearance.
Preferably, above-mentioned sealing platform, the first lead and the second lead are integrated injection mo(u)lding.
Preferably, above-mentioned return springs is tower spring, and described tower spring comprises top drum spring coil and bottom column spring coil, and the diameter of described top drum spring coil is less than the diameter of bottom column spring coil; Described top drum spring coil is arranged on sealing platform bottom, and the setting of described bottom column spring coil on the cover board.
Further, above-mentioned top drum spring coil is enclosed within on the second lead.
Preferably, above-mentioned liquid injection hole is provided with liquid injection hole step around, and described unidirectional valve is arranged on liquid injection hole step.
Preferably, the through hole of above-mentioned sealing ring and the first lead combine by interference fit.
In addition, the present invention also provides a kind of lithium ion battery, and the enclosuring structure of described lithium ion battery is above-mentioned lithium ion battery enclosuring structure.
Lithium ion battery enclosuring structure provided by the invention, in the fluid injection of battery in formation process, without the Plug Action of carrying out repeatedly, only need can complete by pressing the first lead exhaust and the sealing of battery, convenient and simple for operation, in the exhaust deflation course repeating, can ensure the sealing property that hermetically-sealed construction is good.
Brief description of the drawings
Fig. 1 is lithium ion battery enclosuring structure schematic diagram provided by the invention.
Fig. 2 is seal closure structural representation.
Fig. 3 is cover plate and electrolyte filling hole structure schematic diagram.
Fig. 4 is sealing column structural representation.
Fig. 5 is ring structure schematic diagram.
Fig. 6 is return springs structural representation.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of lithium ion battery enclosuring structure, as shown in Figure 1, comprise cover plate 1, be arranged on liquid injection hole 2 on cover plate 1 and for sealing the unidirectional valve of liquid injection hole 2.Cover plate 1, liquid injection hole 2 are the part of lithium ion battery common in industry, and cover plate 1 is for sealing whole lithium ion battery, and liquid injection hole 2 is for carrying out fluid injection operation to the lithium ion battery of being carried out sealing by cover plate 1.
As depicted in figs. 1 and 2, unidirectional valve comprises with the seal closure 3 of cavity 33 and is arranged on sealing column 4 and the return springs 5 in cavity 33.Unidirectional valve is arranged on liquid injection hole 2, for liquid injection hole 2 is sealed, and in the time of needs exhaust, opens unidirectional valve, realizes the exhaust of lithium ion battery.Seal closure 3 is as unidirectional valve housing, and a cavity 33 is contained in inside, and sealing column 4 and return springs 5 are all arranged in cavity 33.
Seal closure 3 covers on liquid injection hole 2, and seal closure 3 upper ends have the first perforate 31, lower end has the second perforate 32.The first perforate 31 is communicated with cavity 33, the second perforate 32 is also communicated with cavity 33, the second perforate 32 is communicated with liquid injection hole 2 again simultaneously, the first perforate 31, the second perforate 32 and cavity 33 have formed the exhaust passage of battery jointly, the gas of discharging from liquid injection hole 2, be expelled to battery successively through the second perforate 32 and cavity 33, and from the first perforate 31.
The first perforate 31 circular through holes, the through hole of this structure is relatively convenient to technologic designing and making; Certainly, other shape, if semicircle, square, triangle or the shape such as trapezoidal are also desirable, adjusts accordingly according to concrete needs, does not do concrete restriction at this.Above-mentioned seal closure 3 can be arranged on liquid injection hole 2 by welding, also can be fixedly installed in other way on liquid injection hole 2, and as fixing in screw sealing etc., the mode of preferably welding by Laser Welding is fixed on seal closure 3 on liquid injection hole 2.
As shown in Figure 4, sealing column 4 comprises sealing platform 41 and is arranged on first lead 42 on sealing platform 41 tops, the first lead 42 extend out to outside seal closure 3 through the first perforate 31, between the first lead 42 and the first perforate 31, be provided with exhaust space, between sealing platform 41 and the sidewall 34 of cavity 33, be provided with exhaust space.The gas of discharging in liquid injection hole 2, discharges outside battery through the exhaust space between the second perforate 32, cavity 33, sealing platform 41 and the sidewall 34 of cavity 33 and the exhaust space between the first lead 42 and the first perforate 31.
As shown in Figure 1 and Figure 5, on sealing platform 41, be provided with the sealing ring 43 for sealing the first perforate 31, on sealing ring 43, have through hole 431, the first leads 42 and extend out to outside seal closure 3 through this through hole 431 and the first perforate 31, between sealing ring 43 and the sidewall 34 of cavity 33, be provided with exhaust space.The first lead 42 interts in the through hole 431 of sealing ring 43, is convenient to sealing ring 43 to position, in order to avoid cause seal failure because sealing ring 43 misplaces in actual practicality.Meanwhile, between sealing ring 43 and the sidewall 34 of cavity 33, be also provided with exhaust space, for better exhaust.
Above-mentioned sealing ring 43 preferably uses elastomeric material to make, and can better play sealing function.
Sealing platform 41 one end seal the first perforate 31 by sealing ring 43, and the other end props up cover plate 1 by return springs 5.Above-mentioned return springs 5 in compressive state, under normal condition, because the elastic force effect of return springs 5 is pressed in the first perforate 31 around by the sealing ring 43 that is in sealing platform 41 one end, realizes the sealing of sealing ring 43 to the first perforate 31 in seal closure 3.These return springs 5 one end are against the lower end of sealing platform 41, are pressed to the first perforate 31, i.e. the upper end of seal closure 3.Meanwhile, the other end of return springs 5 is against on cover plate 1, under the effect that two ends offset, makes return springs 5 in compressive state.
As shown in Figure 5, on sealing ring 43, be provided with the boss 432 of sealing the first perforate 31.This boss 432 is annular, boss 432 compression seal the first perforates 31 in use.Boss 432 can also be the shapes such as semicircle boss, square boss or trapezoid boss.This structure is for being only the structure of sealing ring 43, and boss 432 can provide more elastic space, can be more firm and sealing property is better for the sealing of the first perforate 31.
The operation principle of above-mentioned lithium ion battery enclosuring structure is as follows:
Under normal circumstances, return springs 5 seals on platform 41 and cover plate 1, therefore in compressive state because two ends are against respectively in seal closure 3.At this moment, the sealing ring 43 on sealing platform 41 can seal the first perforate 31, realizes the sealing of enclosuring structure to liquid injection hole 2.In the time of needs exhaust, press the first lead 42 that is positioned at sealing platform 41 upper ends, return springs 5 is further compressed, thereby makes sealing ring 43 leave the first perforate 31.At this moment, exhaust space between exhaust space, sealing platform 41 and the sidewall 34 of cavity 33 between liquid injection hole 2, the second perforate 32, sealing ring 43 and the sidewall 34 of cavity 33 and the exhaust space between the first lead 42 and the first perforate 31 have formed an exhaust passage jointly, and the gas of inside battery is discharged.After exhaust completes, remove the impressed pressure to the first lead 42, return springs 5 resets, and sealing ring 43 reseals the first perforate 31, realizes the sealing again of liquid injection hole 2.
Above-mentioned enclosuring structure, compared with sealing, has the following advantages with traditional rubber tack:
1, on sealing platform 41, be provided with sealing ring 43, sealing circle 43 can well seal the first perforate 31, effectively prevents the impact of external environment on inside battery under normal condition.
2, sealing platform 41, can be by tight sealing ring 43 being pressed in around the first perforate 31 under the effect of return springs 5, realizes the effective sealing to the first perforate 31, and the first lead 42 interts in sealing ring 43, can well position sealing ring 43.
3, return springs 5 can move up and down sealing column 4 and the combination of sealing ring 43 in seal closure 3, realizes exhaust and the reset sealing function of battery.
4, the first lead 42 can effectively be controlled sealing and the conducting of whole enclosuring structure, realizes exhaust and sealing effectiveness; Simple to operate, and can not cause because of frequent operation the inefficacy of sealing ring.
5, on sealing ring 43, be provided with boss 432, seal with respect to single sealing ring 43, have the elastic space more strengthening, better sealing effectiveness can be provided.
In sum, lithium ion battery enclosuring structure provided by the invention, has not only realized the good fit of unidirectional valve and liquid injection hole, and in the operation of carrying out exhaust and sealing repeatedly, can not impact to the sealing effectiveness of sealing ring simple to operate and good seal performance.
Sealing ring 43 is provided with the sealing ring location division 433 for locating around, sealing ring location division 433 provides the location 3 li of seal closures for sealing ring 43, when use, sealing ring location division 433 can approach the sidewall 34 of seal closure 3 more, sealing ring 43 is significantly reduced in the amplitude of seal closure 3 interior double swerves, effectively reduced and in seal closure 3, rocked the appearance that causes sealing insecure problem because of sealing ring 43.In actual applications, sealing ring 43 is provided with at least two sealing ring location divisions 433 around, and multiple sealing rings location division 433 can better complete positioning function.Sealing ring 43 provided by the invention can be larger sealing ring 43, and by the surrounding location of sealing ring 43, the surrounding of sealing ring 43 withstands on the sidewall 34 of seal closure 3; At this moment, just need on sealing ring 43, have lower through-hole on several, on this, lower through-hole is for exhaust.Or the mode that sealing ring location division 433 is set as mentioned above, arranges at least two sealing ring location divisions 433, between adjacent two sealing ring location divisions 433, leave exhaust space.Sealing ring location division 433 located lateral, the exhaust that exhaust space is unidirectional valve provides enough spaces, and what the present embodiment adopted is 3 sealing ring location divisions 433, as shown in Figure 5, and, between adjacent two sealing ring location divisions 433, leave sunk a part of exhaust space.
As shown in Figure 4, sealing platform 41 bottoms are provided with the second lead 44, and this second lead 44 is for sealing the longitudinal register of platform 41 and the installation of return springs 5.
Sealing platform 41 is provided with the sealing platform location division 411 for locating around, sealing platform location division 411 provides the location 3 li of seal closures for sealing platform 41, when use, sealing platform location division 411 can approach the sidewall 34 of seal closure 3 more, make to seal platform 41 and significantly reduce in the amplitude of seal closure 3 interior double swerves, effectively reduced because sealing platform 41 and in seal closure 3, rocked the appearance that causes sealing insecure problem.In actual applications, sealing platform 41 around operated by rotary motion has at least two sealing platform location divisions 411, and multiple sealing platforms location division 411 can better complete positioning function.Sealing platform 41 provided by the invention can be larger sealing platform 41, and by the surrounding location of sealing platform 41, the surrounding that seals platform 41 withstands on the sidewall 34 of seal closure 3; At this moment, just need on sealing platform 41, have lower through-hole on several, on this, lower through-hole is for exhaust.Or the mode that sealing platform location division 411 is set as mentioned above, arranges at least two sealing platform location divisions 411, between adjacent two sealing platform location divisions 411, leave exhaust space.Sealing platform location division 411 located lateral, the exhaust that exhaust space is unidirectional valve provides enough spaces, and what the present embodiment adopted is 3 sealing platform location divisions 411, as shown in Figure 4, and, between adjacent two sealing platform location divisions 411, leave sunk a part of exhaust space.
As shown in Figure 4, the first lead 42 is provided with the first lead location division 421 for locating around, the first lead location division 421 provides the location 3 li of seal closures for the first lead 42, when use, the first lead location division 421 can approach the sidewall 34 of seal closure 3 more, the first lead 42 is significantly reduced in the amplitude of seal closure 3 interior double swerves, effectively reduced and in seal closure 3, rocked the appearance that causes sealing insecure problem because of the first lead 42.In actual applications, the first lead 42 around operated by rotary motion has at least two the first lead location divisions 421, and multiple the first lead location divisions 421 can better complete positioning function.The first lead location division 421 located lateral, the exhaust that exhaust space is unidirectional valve provides enough spaces, and what the present embodiment adopted is 3 the first lead location divisions 421, as shown in Figure 4, and, between adjacent two the first lead location divisions 421, leave sunk a part of exhaust space.
As shown in Figure 4, the second lead 44 is provided with the second lead location division 441 for locating around, the second lead location division 441 provides the location 3 li of seal closures for the second lead 44, when use, the second lead location division 441 can approach the sidewall 34 of seal closure 3 more, the second lead 44 is significantly reduced in the amplitude of seal closure 3 interior double swerves, effectively reduced and in seal closure 3, rocked the appearance that causes sealing insecure problem because of the second lead 44.In actual applications, the second lead 44 around operated by rotary motion has at least two the second lead location divisions 441, and multiple the second lead location divisions 441 can better complete positioning function.The second lead location division 441 located lateral, the exhaust that exhaust space is unidirectional valve provides enough spaces, and what the present embodiment adopted is 3 the second lead location divisions 441, as shown in Figure 4, and, between adjacent two the second lead location divisions 441, leave sunk a part of exhaust space.
Sealing platform 41, the first lead 42 and the second lead 43 are integrated injection mo(u)lding, are more conducive to assembling and the use of enclosuring structure.
As shown in Figure 6, return springs 5 is tower spring, and described tower spring comprises top drum spring coil 51 and bottom column spring coil 52, and the diameter of top drum spring coil 51 is less than the diameter of bottom column spring coil 52; Top drum spring coil 51 is arranged on sealing platform 41 bottoms, and bottom column spring coil 52 is arranged on cover plate 1.This tower spring is used for supporting sealing column 4, and top circle is less, is enclosed within on sealing column 4 second leads 42, for the location of sealing column 4; Bottom circle is larger, is arranged on cover plate 1, and preference card, between seal closure 3 and liquid injection hole 2, makes tower spring not occur the phenomenons such as skew dislocation.
Further, as shown in Figure 3, the surrounding of liquid injection hole 2 is provided with liquid injection hole step 21, and unidirectional valve is arranged on liquid injection hole step 21., the bottom of seal closure 3 is arranged on liquid injection hole step 21.Seal closure 3 is arranged on liquid injection hole step 21, can better position seal closure 3, in order to avoid there is displacement phenomenon.Above-mentioned liquid injection hole step 21, can be single-stage step, can be also twin-stage, multi-stage stairs, and as shown in Figure 3, what in the present embodiment, adopt is that liquid injection hole step 21 is twin-stage step, comprises installation step 211 and fixing step 212.Seal closure 3 is arranged on installation step 211, can weld, stick on installation step 211; Meanwhile, on fixing step 212, use briquetting or weld in addition a fixed block seal closure 3 is fixed on installation step 211.
The diameter of the first lead location division 421 is less than the diameter of the second lead location division 441, and the diameter of the second lead location division 441 is less than the diameter that seals platform location division 411.Arrange like this and can ensure the stable of whole sealing column, be unlikely to roll or turn on one's side.
The through hole 431 of sealing ring 43 and the first lead 42 combine by interference fit.This cooperation can make position between sealing ring 43 and the first lead 42 more be fixed, and is conducive to the lifting of sealing effectiveness.
In addition, the present invention also provides a kind of lithium ion battery, and the enclosuring structure of this lithium ion battery is lithium ion battery enclosuring structure provided by the invention.This lithium ion battery comprises shell, battery core in the enclosure of parcel and seals the cover plate assembly of described shell, and cover plate assembly just comprises an enclosuring structure, in order to seal liquid injection hole and battery to be carried out to exhaust; This enclosuring structure is lithium ion battery enclosuring structure provided by the invention.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (16)

1. a lithium ion battery enclosuring structure, comprises cover plate (1), is arranged on liquid injection hole (2) on cover plate (1) and for sealing the unidirectional valve of described liquid injection hole (2), it is characterized in that:
Described unidirectional valve comprises with the seal closure of cavity (33) (3) and is arranged on sealing column (4) and the return springs (5) in cavity (33);
Described seal closure (3) covers on described liquid injection hole (2), described seal closure (3) upper end has the first perforate (31), lower end has the second perforate (32), described the first perforate (31) is communicated with cavity (33), described the second perforate (32) is communicated with cavity (33), and described the second perforate (32) is communicated with liquid injection hole (2);
Described sealing column (4) comprises sealing platform (41) and is arranged on first lead (42) on sealing platform (41) top, described the first lead (42) extend out to outside seal closure (3) through the first perforate (31), between described the first lead (42) and the first perforate (31), be provided with exhaust space, between described sealing platform (41) and the sidewall (34) of cavity (33), be provided with exhaust space;
On described sealing platform (41), be provided with the sealing ring (43) for sealing the first perforate (31); On described sealing ring (43), have through hole (431), described the first lead (42) extend out to outside seal closure (3) through described through hole (431) and the first perforate (31), between described sealing ring (43) and the sidewall (34) of described cavity (33), is provided with exhaust space;
Described sealing platform (41) one end seals described the first perforate (31) by sealing ring (43), and the other end props up described cover plate (1) by described return springs (5); On described sealing ring (43), be provided with the boss (432) for sealing described the first perforate (31).
2. lithium ion battery enclosuring structure as claimed in claim 1, is characterized in that: described sealing ring (43) is provided with the sealing ring location division (433) for locating around.
3. lithium ion battery enclosuring structure as claimed in claim 2, is characterized in that: described sealing ring (43) is provided with at least two sealing ring location divisions (433) around, between adjacent two sealing ring location divisions (433), leaves exhaust clearance.
4. lithium ion battery enclosuring structure as claimed in claim 1, is characterized in that: described sealing platform (41) bottom is provided with the second lead (44).
5. lithium ion battery enclosuring structure as claimed in claim 1, is characterized in that: described sealing platform (41) is provided with the sealing platform location division (411) for locating around.
6. lithium ion battery enclosuring structure as claimed in claim 5, is characterized in that: described sealing platform (41) is provided with at least two sealing platform location divisions (411) around, between adjacent two sealing platform location divisions (411), leaves exhaust clearance.
7. lithium ion battery enclosuring structure as claimed in claim 1, is characterized in that: described the first lead (42) is provided with the first lead location division (421) for locating around.
8. lithium ion battery enclosuring structure as claimed in claim 7, is characterized in that: described the first lead (42) is provided with at least two the first lead location divisions (421) around, between adjacent two sealing platform location divisions (421), leaves exhaust clearance.
9. lithium ion battery enclosuring structure as claimed in claim 4, is characterized in that: described the second lead (44) is provided with the second lead location division (441) for locating around.
10. lithium ion battery enclosuring structure as claimed in claim 9, it is characterized in that: described the second lead (44) is provided with at least two the second lead location divisions (441) around, between adjacent two second lead location divisions (441), leave exhaust clearance.
11. lithium ion battery enclosuring structures as claimed in claim 4, is characterized in that: described sealing platform (41), the first lead (42) and the second lead (44) are integrated injection mo(u)lding.
12. lithium ion battery enclosuring structures as claimed in claim 1, it is characterized in that: described return springs (5) is tower spring, described tower spring comprises top drum spring coil (51) and bottom column spring coil (52), and the diameter of described top drum spring coil (51) is less than the diameter of bottom column spring coil (52); Described top drum spring coil (51) is arranged on sealing platform (41) bottom, and described bottom column spring coil (52) is arranged on cover plate (1).
13. lithium ion battery enclosuring structures as claimed in claim 12, is characterized in that: described top drum spring coil (51) is enclosed within on the second lead (44).
14. lithium ion battery enclosuring structures as claimed in claim 1, is characterized in that: described liquid injection hole (2) is provided with liquid injection hole step (21) around, and described unidirectional valve is arranged on liquid injection hole step (21).
15. lithium ion battery enclosuring structures as claimed in claim 1, is characterized in that: the through hole (431) of described sealing ring (43) combines by interference fit with the first lead (42).
16. 1 kinds of lithium ion batteries, is characterized in that: the enclosuring structure of described lithium ion battery is the lithium ion battery enclosuring structure described in claim 1 to 15 any one.
CN201210565041.6A 2012-12-24 2012-12-24 A kind of lithium ion battery enclosuring structure and lithium ion battery thereof Active CN103887453B (en)

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CN103887453B CN103887453B (en) 2016-03-09

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103887454A (en) * 2012-12-24 2014-06-25 上海比亚迪有限公司 Lithium ion battery seal structure and its lithium ion battery
CN111279517A (en) * 2017-11-01 2020-06-12 三星Sdi株式会社 Rechargeable battery
CN113594643A (en) * 2021-02-25 2021-11-02 无锡先导智能装备股份有限公司 Bearing device and plug pin system
US11489221B2 (en) * 2018-02-01 2022-11-01 Contemporary Amperex Technology Co., Limited Power battery and battery module

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CN201749901U (en) * 2010-09-08 2011-02-16 秦皇岛市芯驰光电科技有限公司 Lithium ion battery with steel housing or aluminum housing
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CN201498559U (en) * 2009-09-11 2010-06-02 深圳市雄韬电源科技有限公司 Lithium ion secondary battery sealing formation device
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CN103887454A (en) * 2012-12-24 2014-06-25 上海比亚迪有限公司 Lithium ion battery seal structure and its lithium ion battery
CN103887454B (en) * 2012-12-24 2016-04-13 上海比亚迪有限公司 A kind of lithium ion battery enclosuring structure and lithium ion battery thereof
CN111279517A (en) * 2017-11-01 2020-06-12 三星Sdi株式会社 Rechargeable battery
US11489221B2 (en) * 2018-02-01 2022-11-01 Contemporary Amperex Technology Co., Limited Power battery and battery module
CN113594643A (en) * 2021-02-25 2021-11-02 无锡先导智能装备股份有限公司 Bearing device and plug pin system

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