CN205231128U - Explosion -proof device - Google Patents

Explosion -proof device Download PDF

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Publication number
CN205231128U
CN205231128U CN201521112402.7U CN201521112402U CN205231128U CN 205231128 U CN205231128 U CN 205231128U CN 201521112402 U CN201521112402 U CN 201521112402U CN 205231128 U CN205231128 U CN 205231128U
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CN
China
Prior art keywords
explosion
battery
protection equipment
reinforcing ring
battery cap
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Active
Application number
CN201521112402.7U
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Chinese (zh)
Inventor
郭志君
邓平华
郑于炼
王鹏
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Contemporary Amperex Technology Co Ltd
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Contemporary Amperex Technology Co Ltd
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    • 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

Abstract

The utility model relates to an explosion -proof device strengthens the mechanism, is used for explosion -proof piece and battery top cap to battery inside pressure release including the top cap, the top cap is strengthened the mechanism and is included the beaded finish, vertical through -hole has been seted up on the battery top cap, the beaded finish is fixed on the surface of battery top cap, and encircle vertical through -hole, explosion -proof piece covers vertical through -hole, just the periphery of explosion -proof piece is fixed on the internal surface of battery top cap. The application provides an explosion -proof device can strengthen the intensity of battery top cap for the battery top cap is non -deformable when fixed explosion -proof piece, has reduced the requirement to the processing degree.

Description

Explosion-protection equipment
Technical field
The application relates to technical field of lithium ion, particularly relates to a kind of explosion-protection equipment.
Background technology
The advantages such as capacity density is high owing to having for lithium ion battery, specific energy is large and have extended cycle life, have become the first-selected battery of portable electronic product, electric automobile, energy storage, and obtain and apply more and more widely.Lithium ion battery mainly comprises with lower part: by positive plate stacked successively, barrier film, negative plate reel the battery core obtained, the outside being set in battery core shell, be positioned at the battery cap of cover top portion, and be arranged on the first pole, the second pole and the liquid injection hole for injecting electrolyte on battery cap.
Due at lithium ion battery built with a large amount of chemical substances, in the process of battery charging and discharging, a large amount of mists can be produced, make inside battery constantly build pressure, if these pressure are not released in time, can battery explosion be caused.In order to prevent battery explosion, need the pressure accumulating in inside battery to discharge, measure the most common arranges safety guard on battery cap.
At present, common safety guard becomes longitudinal hole in battery cap upper punch swaging, then directly welds burst disk; but battery cap intensity is poor, is easily out of shape; the requirement to battery cap flatness when welding burst disk can not be met, cause processing request high.
Utility model content
In order to solve the problem, this application provides a kind of explosion-protection equipment, the intensity of battery cap can be strengthened, make battery cap not yielding when fixing burst disk, reduce the requirement to degree of finish.
To achieve these goals, the application provides a kind of explosion-protection equipment, comprise top cover reinforcing mechanisms, for the burst disk of inside battery pressure release and battery cap, described top cover reinforcing mechanisms comprises reinforcing ring, described battery cap offers longitudinal hole, and described reinforcing ring is fixed on the outer surface of described battery cap, and around described longitudinal hole, described burst disk covers described longitudinal hole, and the periphery of described burst disk is fixed on the inner surface of described battery cap.
Preferably; explosion-protection equipment also comprises protective layer; described protective layer is attached to described reinforcing ring to deviate from the surface of the outer surface of described battery cap, and covers described longitudinal hole, and the hole wall of described protective layer, described burst disk and described longitudinal hole surrounds airtight chamber jointly.
Preferably, explosion-protection equipment also comprises tack coat, and described tack coat is arranged between described reinforcing ring and described protective layer.
Preferably, explosion-protection equipment also comprises means of communication, and described means of communication is arranged on described reinforcing ring, and one end of described means of communication extends to described airtight chamber, the other end of described means of communication extends to the edge of described reinforcing ring, and described airtight chamber is connected with outside.
Preferably, described means of communication comprises groove, the opening of described groove is opened in described reinforcing ring and deviates from the surface of the outer surface of described battery cap, and one end of described groove extends to described confined space, and the other end of described groove extends to the edge of described reinforcing ring.
Preferably, the width of the opening of described groove is 0.05 ~ 1mm.
Preferably, the degree of depth of described groove is 0.05 ~ 1mm.
Preferably, the cross section of described groove is V-shaped, U-shaped, semicircle or square.
Preferably, the thickness of described reinforcing ring is 0.2 ~ 2mm.
Preferably, the anchor ring width of described reinforcing ring is 0.2 ~ 3mm.
The explosion-protection equipment that the application provides, can strengthen the intensity of battery cap, makes battery cap not yielding when fixing burst disk, reduces the requirement to degree of finish.
Accompanying drawing explanation
The structural representation of the using state of the explosion-protection equipment that Fig. 1 provides for the embodiment of the present application;
The decomposition texture schematic diagram of the explosion-protection equipment that Fig. 2 provides for the embodiment of the present application;
The structural representation of the using state of the explosion-protection equipment that Fig. 3 provides for the embodiment of the present application;
The decomposition texture schematic diagram of the explosion-protection equipment that Fig. 4 provides for the embodiment of the present application;
The cross-sectional view of the explosion-protection equipment that Fig. 5 provides for the embodiment of the present application;
The explosion-protection equipment that Fig. 6 provides for the embodiment of the present application face structural representation;
The structural representation of the groove that the cross section of the explosion-protection equipment that Fig. 7 provides for the embodiment of the present application is V-shaped;
The structural representation of the groove that the cross section of the explosion-protection equipment that Fig. 8 provides for the embodiment of the present application is U-shaped;
The structural representation of the groove that the cross section of the explosion-protection equipment that Fig. 9 provides for the embodiment of the present application is square.
Drawing reference numeral explanation
2-battery cap; 20-longitudinal hole; 22-first pole; 24-second pole; 26-liquid injection hole; 4-top cover reinforcing mechanisms; 40-reinforcing ring; 42-protective layer; 44-airtight chamber; 6-burst disk; 8-means of communication; 80-groove.
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows and meets embodiment of the present utility model, and is used from specification one and explains principle of the present utility model.
Embodiment
Be described in detail below by the application, the feature of the application and advantage will illustrate along with these and become more clear, clear and definite.
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
The utility model embodiment provides a kind of explosion-protection equipment, as shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, comprises top cover reinforcing mechanisms 4, for the burst disk 6 of inside battery pressure release and battery cap 2, also comprises means of communication 8 and protective layer 42.
In the above-described embodiments, top cover reinforcing mechanisms 4 comprises reinforcing ring 40, battery cap 2 offers longitudinal hole 20, reinforcing ring 40 is fixed on the outer surface of battery cap 2, and reinforcing ring 40 is around longitudinal hole 20, specifically, reinforcing ring 40 structure in the form of a ring, this circulus can be racetrack, also can be annular, burst disk 6 covers longitudinal hole 20, and the periphery of burst disk 6 is fixed on the inner surface of battery cap 2, whole burst disk 6 covers longitudinal hole 20, thus the pressure played inside battery produces carries out pressure release, the not special restriction of the mode that burst disk 6 is fixing in addition, laser welding such as can be selected to be fixed burst disk 6.It should be noted that, longitudinal hole 20 runs through whole top cover, and that is this longitudinal hole 20 makes the inside of battery communicate with outside.In order to strengthen the steadiness of top cover reinforcing mechanisms 4, preferred reinforcing ring 40 is structure as a whole with battery cap 2.Due to the setting of top cover reinforcing mechanisms 4, increase effectively the intensity of battery cap 2, avoid following situation: because battery cap 2 intensity difference is easily deformable, when especially selecting aluminum hull as battery cap 2, can not ensure when fixing burst disk 6, such as can not ensure when adopting method of laser welding to fix burst disk 6, to the requirement of the flatness of battery cap 2, in addition, the setting of reinforcing ring 40 also helps locates other devices at the outer surface of battery cap 2, such as, be conducive to positioning explosion-proof screen cloth.Therefore, the setting of top cover reinforcing mechanisms 4, reduces the processing request degree to fixing burst disk 6, improves steadiness and the reliability of whole explosion-protection equipment simultaneously.
When both exceeding the thickness increasing battery cap 2, effectively can improve again the intensity of battery cap 2, the thickness of reinforcing ring 40 is preferably 0.2 ~ 2mm, more preferably 0.5 ~ 1mm, in addition, the anchor ring width of reinforcing ring 40 is preferably 0.2 ~ 3mm, more preferably 0.8 ~ 2mm.
In the production process of battery, often there are electrolyte or other foreign substance pollutions to the surface of burst disk 6, and in the course of processing of battery, because misoperation can encounter burst disk 6, cause staying on the surface of burst disk 6 breaking of scratch or burst disk 6, these all can affect the preparation efficiency of battery and can not play explosion-proof effect thus affect the fail safe of battery.In order to the security performance and raising that improve battery prepare the production efficiency of battery; the surface deviating from the outer surface of battery cap 2 at reinforcing ring 40 attaches protective layer 42; and protective layer 42 covers longitudinal hole 20; now, the hole wall of protective layer 42, burst disk 6 and longitudinal hole 20 surrounds airtight chamber 44 jointly.To the material not special requirement of protective layer 42; such as protective layer 42 can be at least one in PETG (referred to as PET) layer, polypropylene (referred to as PP) layer and Merlon (referred to as PC) layer; but not only for above-mentioned several, can select according to demand.In order to make protective layer 42 applied solid on reinforcing ring 40; between protective layer 42 and reinforcing ring 40, tack coat is set; wherein tack coat can be the one in layer of polyurethane, polyacrylic acid ester layer and butadiene-styrene rubber layer; but not only for above-mentioned several; can select according to demand, as long as play cementation.
After set up protective layer 42 in explosion-protection equipment, in order to can when carrying out air-leakage test to battery, better quality inspection is carried out to burst disk 6, specifically, in order to the periphery of the breakage and burst disk 6 that better detect burst disk 6 welds situation with the inner surface of battery cap 2, reinforcing ring 40 arranges means of communication 8, one end of means of communication 8 extends to airtight chamber 44, the other end of means of communication 8 extends to the edge of reinforcing ring 40, airtight chamber 44 is connected with outside, outside herein refers to after battery cap 2 is placed on the top of battery core shell, be positioned at the space of whole outside batteries.
In order to easy to prepare, and reduce costs, means of communication 8 comprises groove 80, as shwon in Figures 5 and 6, the opening of groove 80 is opened in reinforcing ring 40 and deviates from the surface of the outer surface of battery cap 2, one end of groove 80 extends to confined space 44, and the other end of groove 80 extends to the edge of reinforcing ring 40, is connected with outside to make airtight chamber 44.Due to the setting of groove 80; even if there is protective layer 42, the periphery of the breakage and burst disk 6 that also conveniently can detect burst disk 6 welds situation with the inner surface of battery cap 2, therefore; not only increase quality inspection efficiency, and improve fail safe and the dependability of battery.When meet can detect burst disk 6 breakage, and do not affect again the accuracy of testing result, the width of the opening of groove 80 is 0.05 ~ 1mm, preferably 0.1 ~ 0.5mm, and in addition, the degree of depth of groove 80 is 0.05 ~ 1mm, preferably 0.1 ~ 0.5mm.
In order to improve the accuracy of quality inspection further and conveniently prepare groove 80, as shown in Fig. 7, Fig. 8 and Fig. 9, the cross section of groove 80 can be V-shaped, U-shaped, semicircle or square.
The shape of burst disk 6 does not have particular/special requirement, and such as burst disk 6 can be roughly Long Circle or circle, can select suitable shape particularly according to the shape of the longitudinal hole 20 be opened on battery cap 2.
As shown in Figure 1, Figure 2, shown in Fig. 3 and Fig. 4, battery cap 2 is also provided with the first pole 22, second pole 24 and the liquid injection hole 26 for injecting electrolyte, wherein the first pole 22, second pole 24 and liquid injection hole 26 are disposed side by side on the outer surface of battery cap 2, preferably, liquid injection hole 26 is between the first pole 22 and top cover reinforcing mechanisms 4, or liquid injection hole 26 is between the second pole 24 and top cover reinforcing mechanisms 4.
The explosion-protection equipment that the application provides, owing to being fixedly installed top cover reinforcing mechanisms 4 on the outer surface of battery cap 2, add the intensity of battery cap 2, especially when the width of battery cap 2 is narrower, make battery cap 2 not yielding when carrying out laser welding to burst disk 6, reduce the requirement to degree of finish, make operability stronger, and improve stability and the reliability of whole explosion-protection equipment, in addition, by the setting of protective layer 42, avoid the pollution of the foreign matters such as electrolyte to burst disk 6, in addition, by on the surface that deviates from the outer surface of described battery cap 2 at reinforcing ring 40, means of communication 8 is set, even if deposit in case at protective layer 42, also can the fixing situation of the inner surface of the breakage of conveniently quality inspection burst disk 6 and the periphery of burst disk 6 and battery cap 2.
The explosion-protection equipment that the application provides, applied range, can be applicable in various battery, such as lithium ion battery, is especially applicable to being applied in lithium ion battery with hard shell.
The announcement of book according to the above description, the application those skilled in the art can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the application is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the application some modifications and changes of the application.

Claims (10)

1. an explosion-protection equipment, is characterized in that, comprises top cover reinforcing mechanisms, for the burst disk of inside battery pressure release and battery cap,
Described top cover reinforcing mechanisms comprises reinforcing ring, and described battery cap offers longitudinal hole, and described reinforcing ring is fixed on the outer surface of described battery cap, and around described longitudinal hole,
Described burst disk covers described longitudinal hole, and the periphery of described burst disk is fixed on the inner surface of described battery cap.
2. explosion-protection equipment according to claim 1; it is characterized in that; also comprise protective layer; described protective layer is attached to described reinforcing ring and deviates from the surface of the outer surface of described battery cap; and covering described longitudinal hole, the hole wall of described protective layer, described burst disk and described longitudinal hole surrounds airtight chamber jointly.
3. explosion-protection equipment according to claim 2, is characterized in that, also comprises tack coat, and described tack coat is arranged between described reinforcing ring and described protective layer.
4. explosion-protection equipment according to claim 2, it is characterized in that, also comprise means of communication, described means of communication is arranged on described reinforcing ring, one end of described means of communication extends to described airtight chamber, the other end of described means of communication extends to the edge of described reinforcing ring, and described airtight chamber is connected with outside.
5. explosion-protection equipment according to claim 4, it is characterized in that, described means of communication comprises groove, the opening of described groove is opened in described reinforcing ring and deviates from the surface of the outer surface of described battery cap, one end of described groove extends to described confined space, and the other end of described groove extends to the edge of described reinforcing ring.
6. explosion-protection equipment according to claim 5, is characterized in that, the width of the opening of described groove is 0.05 ~ 1mm.
7. explosion-protection equipment according to claim 5, is characterized in that, the degree of depth of described groove is 0.05 ~ 1mm.
8. explosion-protection equipment according to claim 5, is characterized in that, the cross section of described groove is V-shaped, U-shaped, semicircle or square.
9. explosion-protection equipment according to claim 1, is characterized in that, the thickness of described reinforcing ring is 0.2 ~ 2mm.
10. explosion-protection equipment according to claim 1, is characterized in that, the anchor ring width of described reinforcing ring is 0.2 ~ 3mm.
CN201521112402.7U 2015-12-29 2015-12-29 Explosion -proof device Active CN205231128U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521112402.7U CN205231128U (en) 2015-12-29 2015-12-29 Explosion -proof device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521112402.7U CN205231128U (en) 2015-12-29 2015-12-29 Explosion -proof device

Publications (1)

Publication Number Publication Date
CN205231128U true CN205231128U (en) 2016-05-11

Family

ID=55906174

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201521112402.7U Active CN205231128U (en) 2015-12-29 2015-12-29 Explosion -proof device

Country Status (1)

Country Link
CN (1) CN205231128U (en)

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
IP01 Partial invalidation of patent right

Commission number: 5W120186

Conclusion of examination: Declare that the claims of utility model no. 201521112402.7 are partially invalid, and continue to maintain the validity of the patent on the basis of claims 1-8 submitted by the patentee on August 10, 2020

Decision date of declaring invalidation: 20210707

Decision number of declaring invalidation: 50838

Denomination of utility model: Explosion proof device

Granted publication date: 20160511

Patentee: Contemporary Amperex Technology Co.,Ltd.