CN207676956U - Cylindrical lithium ion battery cap - Google Patents

Cylindrical lithium ion battery cap Download PDF

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Publication number
CN207676956U
CN207676956U CN201721738757.6U CN201721738757U CN207676956U CN 207676956 U CN207676956 U CN 207676956U CN 201721738757 U CN201721738757 U CN 201721738757U CN 207676956 U CN207676956 U CN 207676956U
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CN
China
Prior art keywords
connection sheet
lithium ion
burst disk
ion battery
cylindrical lithium
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CN201721738757.6U
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Chinese (zh)
Inventor
熊杏萍
李艳斌
胡江波
岳绍宇
刘宣业
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Shenzhen Bak Battery Co Ltd
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Shenzhen Bak Battery Co Ltd
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Priority to CN201721738757.6U priority Critical patent/CN207676956U/en
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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 belongs to cylindrical lithium ion battery technical field, is to be related to cylindrical lithium ion battery cap more specifically.Burst disk is directly connected in head cover, removes the ring plate in existing cap, effectively reduces cap height, increases inside battery space and cost-effective, reduces cap internal resistance, contributes to design capacity and discharge performance more preferably battery;Solve the problems, such as in existing cap that multiple ring plate structure contact resistances are larger and unstable are unfavorable for using simultaneously.

Description

Cylindrical lithium ion battery cap
Technical field
The utility model belongs to cylindrical lithium ion battery technical field, is to be related to cylindrical lithium ion battery more specifically Use cap.
Background technology
Lithium ion battery is high with operating voltage, energy density is big, have extended cycle life, self-discharge rate is low, monomer volume is small The advantages that, while there is also safety problems, such as in high temperature, short circuit, overcharge, cross and put abnormal conditions under, lithium ion battery is easily sent out The danger such as raw overheat, on fire or even explosion.The effect of cylindrical lithium ion battery cap make sure that in exception conditions can and When prevent lithium ion battery work on, potential danger is excluded early.Its operation principle is as follows:In high temperature, short circuit, overcharge Or cross and put etc. under exceptional conditions, inside lithium ion cell air pressure will increase, and when air pressure reaches a certain level, cap can disconnect automatically Circuit makes battery stop foreign work;If inside battery continues to react, air pressure persistently increases, and cap will open relief valve Gas is discharged, avoids exploding.However there is also safety in design for the existing cylindrical lithium ion battery cap of existing market Explosion-proof defect and overcurrent performance deficiency, are mainly manifested in:After cap plays power-off explosion-proof, burst disk and connection sheet point From connection sheet falls into inside battery, there is the risk for causing internal short-circuit and causing explosion on fire;Power-off protection effect needs to allow The connection welding of burst disk and connection sheet disconnects, therefore solder joint firmness can not be too high, mistake larger so as to cause whole internal resistance Current capacity is poor.In addition, the height of existing cap restricts inside battery space, it is unfavorable for the promotion of battery capacity.
It please refers to Fig.1, Fig. 2, cap in the prior art comprising head cover 1, burst disk 2, cage ring 3, connects gasket 10 Contact pin 4, sealing ring 5.Wherein head cover 1 is nickel plating ironware, and gasket 10 is nickel-plated aluminum ring plate.Burst disk 2 is equipped with rupture groove 8, even Contact pin 4 is equipped with gas vent 7.Burst disk 2 is connect with connection sheet 4 by pad 6;This larger, overcurrent energy of structure cap height Power is poor.Referring to Fig. 2, when lithium ion battery is abnormal, because inside battery air pressure is excessive convex surface occurs for burst disk 2 Negative direction deforms, and breaks pad 6 and connection sheet 4 is caused to fall off, and contacted with battery core, when battery is vibrated or impacts in battery Portion is likely to form new short circuit phenomenon, causes secondary on fire or explosion.Burst disk 2 is connect with connection sheet 4 by pad 6, is Play the role of power-off protection, burst disk 2 connect weaker with 4 pad 6 of connection sheet, and cap internal resistance is larger, and overcurrent capability is poor.
Utility model content
The purpose of this utility model is to provide cylindrical lithium ion battery caps, to solve existing cylindrical lithium ion battery The technical issues of with cap height larger restriction inside battery space.
To achieve the above object, the technical solution adopted in the utility model is:A kind of cylindrical lithium ion battery cap is provided Lid, including:
Head cover;
It is connected to the burst disk of the side of the head cover;
Its middle part and the connection sheet being connected in the middle part of the burst disk;
Cage ring between the burst disk and the connection sheet;And
It is sheathed on the head cover, the burst disk, the cage ring and the sealing ring other than the connection sheet.
Further, it is connected using arc line shaped laser welding between the head cover and the burst disk.
Further, the burst disk is formed with bulge-structure, the cage ring departing from the side protrusion of the head cover It is sheathed on other than the bulge-structure.
Further, the burst disk is formed with boss departing from the side protrusion of the head cover, and the burst disk is equipped with Groove is ruptured, the connection sheet offers fracture groove in the peripheral region corresponding to the boss, and the connection sheet is by described disconnected It splits groove and marks off interconnecting piece for being connected with the boss.
Further, it is connected using punching press and laser welding between the middle part of the burst disk and the middle part of the connection sheet It connects, the junction of the plane of the boss and the middle plane of the connection sheet is Laser Welding contact.
Further, the connection sheet offers gas vent, and the burst disk, the cage ring, the connection sheet enclose It is formed with the admission space being connected to the gas vent.
Further, the sealing ring has the parcel for being used to support the connection sheet.
Further, the cage ring has for the embedded groove for connection sheet insertion.
Further, the cage ring is bonded by hot pressing with the burst disk.
Further, the sealing ring is plastic rubber ring.
The utility model having the technical effect that compared with the existing technology:Burst disk is directly connected in head cover, removes existing cap Ring plate in lid effectively reduces cap height, increases inside battery space and cost-effective, reduces cap internal resistance, helps to set Count capacity and discharge performance more preferably battery;It is larger and unstable to solve multiple ring plate structure contact resistances in existing cap simultaneously The problem of being unfavorable for using.
Description of the drawings
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new Some embodiments of type for those of ordinary skill in the art without having to pay creative labor, can be with Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram of the cylindrical lithium ion battery cap of the prior art;
Fig. 2 is status diagram of the cylindrical lithium ion battery cap of Fig. 1 after explosion-proof;
Fig. 3 is the structural schematic diagram for the cylindrical lithium ion battery cap that the utility model embodiment provides;
Fig. 4 is the vertical view of the cylindrical lithium ion battery cap of Fig. 3;
Fig. 5 is the upward view of the cylindrical lithium ion battery cap of Fig. 3;
Fig. 6 is status diagram of the cylindrical lithium ion battery cap of Fig. 3 after explosion-proof.
Specific implementation mode
In order to make technical problem to be solved in the utility model, technical solution and advantageous effect be more clearly understood, with Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be directly another On one element or it is connected on another element.When an element is known as " being connected to " another element, it can To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on ... shown in the drawings or position are closed System, is merely for convenience of describing the present invention and simplifying the description, does not indicate or imply the indicated device or element is necessary With specific orientation, with specific azimuth configuration and operation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for description purposes only, it is not understood to indicate or imply relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more this feature.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.
Fig. 3 to Fig. 6 is please referred to, first cylindrical lithium ion battery provided by the utility model is illustrated with cap.Cylinder Lithium ion battery cap, including head cover 10, burst disk 20, connection sheet 30, cage ring 40, sealing ring 50.Burst disk 20 connects In the side of head cover 10, the middle part of connection sheet 30 is connected with the middle part of burst disk 20;Cage ring 40 is set to burst disk 20 and connects Between contact pin 30;Sealing ring 50 is sheathed on other than head cover 10, burst disk 20, cage ring 40 and connection sheet 30.
Burst disk 20 is directly connected in head cover 10, removes the ring plate in existing cap, effectively reduces cap height, increases electricity Pond inner space and cost-effective reduces cap internal resistance, contributes to design capacity and discharge performance more preferably battery;It solves simultaneously In existing cap multiple ring plate structure contact resistances it is larger and it is unstable be unfavorable for use the problem of.
Head cover 10 has upward lug boss 11.10 lug boss 11 of head cover is with tapered lug boss 11, lug boss 11 top surface is plane, which is easily worked.Cage ring 40 is ring-like to be adhered in burst disk 20.Connection sheet 30 and cage ring 40 It fits.The shell of cylindrical lithium ion battery is battery steel shell, and inside battery is battery fluid.
Head cover 10, burst disk 20, cage ring 40, connection sheet 30 form cap inner core, are sealed in cap inner core outer cover Circle 50.Sealing ring 50 is plastic rubber ring, is wrapped up by battery steel shell faucal.The sealing ring 50 is molded using Shooting Technique.Sealing ring 50 play the role of sealing and insulation.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, It is connected using arc line shaped laser welding between head cover 10 and burst disk 20.The program is easily worked, and is connected firmly.Compared to existing The soldering of cap connects, and laser welding process is simple, and manufacturing process is easy to control, and manufacturing process is easy to control, and it is anti-to be not easy burn-through Quick-fried 20, promote cap qualification rate.Welding position 61 has at 3, is evenly distributed on 10 edge of head cover in a ring, program connection can It leans on.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, Burst disk 20 is formed with bulge-structure 21 departing from the side protrusion of head cover 10, and cage ring 40 is sheathed on other than bulge-structure 21. The structure positions convenient for cage ring 40 to burst disk 20.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, Burst disk 20 is formed with boss 22 departing from the side protrusion of head cover 10, and burst disk 20 is equipped with rupture groove 23, and connection sheet 30 exists Corresponding to boss 22 peripheral region offer fracture groove 32, connection sheet 30 by fracture groove 32 mark off for 22 phase of boss The interconnecting piece 33 of connection.Fracture groove 32, the connection formed by fracture groove 32 in connection sheet 30 are opened up in connection sheet 30 Portion 33 is connected with boss 22, forms power-off opening structure, can promote cap safety anti-explosive performance, overcurrent performance.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, It is connected using punching press and laser welding between the middle part of burst disk 20 and the middle part of connection sheet 30, the plane of boss 22 and connection The junction of the middle plane of piece 30 is Laser Welding contact 62.The program is easily worked, and is connected firmly.
The boss 22 of burst disk 20 is with tapered boss 22, and the top surface of boss 22 is plane, which is easily worked, Convenient for being connected with the middle part of connection sheet 30.The boss 22 is the smaller circular bosses 22 of height, and the top surface of the boss 22 is plane, The height of the boss 22 by burst disk 20 and connection sheet 30 apart from determination, as long as meeting the following conditions, i.e.,:Connection sheet 30 is flat Face is combined with 20 boss of burst disk, 22 plane, and using punching press and laser welding process, technological requirement is to ensure to be connected firmly, and is connected Power is more than the attachment force of fracture groove 32.
It using fracture groove 32, is securely welded with Laser Welding between burst disk 20 and connection sheet 30, cap is made to contact internal resistance Smaller, overcurrent performance is stronger, improves the high rate performance of battery.Existing cap using burst disk and connection sheet connection welding into Row power-off protection, limits the firmness of solder joint, and internal resistance is larger.Groove power-off requires height, solder joint disconnected punching press craft precision Electricity is high to Laser Welding technological requirement.In contrast, groove manufacturing process is simpler, and the control for powering off pressure value is more accurate.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, Connection sheet 30 offers gas vent 31, burst disk 20, cage ring 40, connection sheet 30 be enclosed be connected to gas vent 31 into Headroom.When battery is abnormal, the gas that inside battery generates enters admission space from gas vent 31 and makes burst disk 20 It is flipped up, after the rupture groove 23 in burst disk 20 ruptures, the gas of inside battery can be discharged by gas vent 31, mitigate battery Interior pressure.31 quantity of gas vent is designed as needed.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, Sealing ring 50 has the parcel 51 for being used to support connection sheet 30.The parcel 51 of sealing ring 50 can support connection sheet 30, prevent Connection sheet 30 drops to inside battery core after power-off pressure release effect occurs for cap and causes internal short-circuit, forms two subsidiary risks, is promoted Cap safety anti-explosive performance.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, Cage ring 40 has the embedded groove 41 for being embedded in for connection sheet 30.Cage ring 40 wraps up connection sheet 30, realizes to connection sheet 30 Positioning.
Further, a kind of specific implementation mode as cylindrical lithium ion battery cap provided by the utility model, Cage ring 40 is bonded by hot pressing with burst disk 20.The program is easily worked, and assembly is reliable.
Please referring to Fig. 3 to Fig. 6, the utility model also provides the manufacturing method of cylindrical lithium ion battery cap, including with Lower step:
S1) carry out head cover 10, burst disk 20, connection sheet 30 it is blanking punched;It is formed and is ruptured in 20 punch process of burst disk Groove 23 and bulge-structure 21, in 30 punch process exhaust hole 31 of connection sheet;Injection molding cage ring 40, sealing ring 50;Row 31 quantity of stomata is designed as needed.
S2 side of the side of head cover 10 with burst disk 20 departing from bulge-structure 21) is made to be connected using laser welding. The program is easily worked, and is connected firmly.Soldering compared to existing cap connects, and laser welding process is simple, and manufacturing process is easy Control, manufacturing process are easy to control, and are not easy burn-through burst disk 20, promote cap qualification rate.Welding position 61 has at 3, in a ring It is evenly distributed on 10 edge of head cover, program connection is reliable.
S3) cage ring 40 is set in other than bulge-structure 21, bulge-structure 21 positions convenient for cage ring 40 to burst disk On 20.Cage ring 40 is bonded by hot pressing with burst disk 20, and the program is easily worked, and assembly is reliable.
S4 so that connection sheet 30 is fitted with cage ring 40, the middle part of burst disk 20 made to be connected with the middle part of connection sheet 30, Burst disk 20, cage ring 40, connection sheet 30 is set to be enclosed the admission space being connected to gas vent 31;
S5) head cover 10, burst disk 20, cage ring 40, connection sheet 30 form cap inner core, close in cap inner core outer cover Seal 50.
Burst disk 20 is directly connected in head cover 10, removes the ring plate in existing cap, effectively reduces cap height, increases electricity Pond inner space and cost-effective reduces cap internal resistance, contributes to design capacity and discharge performance more preferably battery;It solves simultaneously In existing cap multiple ring plate structure contact resistances it is larger and it is unstable be unfavorable for use the problem of.
Head cover 10 has upward lug boss 11.10 lug boss 11 of head cover is with tapered lug boss 11, lug boss 11 top surface is plane, which is easily worked.The shell of cylindrical lithium ion battery is battery steel shell, and inside battery is battery Liquid.
Sealing ring 50 is plastic rubber ring, is wrapped up by battery steel shell faucal.The sealing ring 50 is molded using Shooting Technique.Sealing Circle 50 plays the role of sealing and insulation.Sealing ring 50 has the parcel 51 for being used to support connection sheet 30.The packet of sealing ring 50 Connection sheet 30 can be supported by wrapping up in portion 51, prevent connection sheet 30 from dropping to inside battery core and causing after power-off pressure release effect occurs for cap Internal short-circuit forms two subsidiary risks, promotes cap safety anti-explosive performance.
When battery is abnormal, the gas that inside battery generates enters admission space from gas vent 31 and makes burst disk 20 It is flipped up, after the rupture groove 23 in burst disk 20 ruptures, the gas of inside battery can be discharged by gas vent 31, mitigate battery Interior pressure.
Further, specific as one kind of the manufacturing method of cylindrical lithium ion battery cap provided by the utility model Embodiment further includes forming boss 22 in 20 punch process of burst disk, goes out in 30 punch process of connection sheet disconnected in step 1) Split groove 32, fracture groove 32 is corresponding with the peripheral region of boss 22, and connection sheet 30 is marked off by fracture groove 32 to be used for and boss 22 interconnecting pieces 33 being connected.Fracture groove 32 is opened up in connection sheet 30, is formed by fracture groove 32 in connection sheet 30 Interconnecting piece 33 is connected with boss 22, forms power-off opening structure, can promote cap safety anti-explosive performance, overcurrent performance.It adopts It with fracture groove 32, is securely welded with Laser Welding between burst disk 20 and connection sheet 30, cap is made to contact internal resistance smaller, overcurrent Performance is stronger, improves the high rate performance of battery.Existing cap carries out power-off protection using the connection welding of burst disk and connection sheet, The firmness of solder joint is limited, internal resistance is larger.Groove power-off requires height, solder joint to power off to laser welder punching press craft precision Skill requires high.In contrast, groove manufacturing process is simpler, and the control for powering off pressure value is more accurate.
Further, specific as one kind of the manufacturing method of cylindrical lithium ion battery cap provided by the utility model Embodiment is connected between the middle part and connection sheet 30 of burst disk 20 using punching press and laser welding in step 4), boss The junction of 22 plane and the middle plane of connection sheet 30 is Laser Welding contact 62.The program is easily worked, and is connected firmly.It is anti- Quick-fried 20 boss 22 is with tapered boss 22, and the top surface of boss 22 is plane, which is easily worked, convenient for The middle part of connection sheet 30 is connected.The boss 22 is the smaller circular bosses 22 of height, and the top surface of the boss 22 is plane, the boss 22 height by burst disk 20 and connection sheet 30 apart from determination, as long as meeting the following conditions, i.e.,:30 plane of connection sheet with it is anti- Quick-fried 20 boss, 22 plane combines, and using punching press and laser welding process, technological requirement is to ensure to be connected firmly, and attachment force is more than It is broken the attachment force of groove 32.
Further, specific as one kind of the manufacturing method of cylindrical lithium ion battery cap provided by the utility model Embodiment, cage ring 40 have the embedded groove 41 for being embedded in for connection sheet 30.Cage ring 40 wraps up connection sheet 30, realization pair The positioning of connection sheet 30.
Three groups of contrast tests are used below, verify the cylindrical lithium ion battery cap of the utility model or new by this practicality The cylindrical lithium ion battery that type manufacturing method makes is with cap (hereinafter referred to as the utility model cap), compared with the existing technology Superiority.
Experiment one:
By the utility model cap and existing cap, it is assembled into battery respectively and tests inside battery space:By this practicality Novel assembling inside battery space be 5.5898ml, the inside battery space being assembled by existing cap is 5.5285ml, The two differs 0.0613ml.Test shows that the inner space of battery can be improved in the battery that the utility model is assembled into, to develop more The battery of high power capacity provides may.
Experiment two:
It respectively takes 25pcs the utility model cap and existing cap to carry out power-off and suppresses test:The company of the utility model cap Contact pin 30 is retained in after disconnecting in sealing ring 50, and existing cap then all falls off, and falls into test equipment.Test result table Bright, the security performance of the utility model cap is substantially better than existing cap.
Suppress the power-down value situation of test record the utility model cap and existing cap:The utility model cap mean value It is 1.095 for 1.080MPa, minimum value 0.985MPa, maximum value 1.134MPa, CPK (process capability index);Existing cap Lid mean value is 0.994MPa, minimum value 0.904MPa, maximum value 1.157MPa, CPK 0.999.The result shows that indentation is disconnected The pressure control of electricity is more excellent.
Experiment three:
25pcs the utility model cap and existing cap is respectively taken to carry out inner walkway:The internal resistance of the utility model cap is equal Value is 2.35m Ω, existing cap internal resistance mean value 4.15m Ω.Test result shows that the internal resistance of the utility model cap is obviously dropped It is low, the high rate performance of battery can be promoted.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all in this practicality All any modification, equivalent and improvement etc., should be included in the guarantor of the utility model made by within novel spirit and principle Within the scope of shield.

Claims (10)

1. cylindrical lithium ion battery cap, which is characterized in that including:
Head cover;
It is connected to the burst disk of the side of the head cover;
Its middle part and the connection sheet being connected in the middle part of the burst disk;
Cage ring between the burst disk and the connection sheet;And
It is sheathed on the head cover, the burst disk, the cage ring and the sealing ring other than the connection sheet.
2. cylindrical lithium ion battery cap as described in claim 1, which is characterized in that the head cover and the burst disk it Between be connected using arc line shaped laser welding.
3. cylindrical lithium ion battery cap as described in claim 1, which is characterized in that the burst disk is departing from the top The side protrusion of lid is formed with bulge-structure, and the cage ring is sheathed on other than the bulge-structure.
4. cylindrical lithium ion battery cap as described in claim 1, which is characterized in that the burst disk is departing from the top The side protrusion of lid is formed with boss, and the burst disk is equipped with rupture groove, and the connection sheet is in the week corresponding to the boss Fracture groove is offered at edge, the connection sheet marks off the connection for being connected with the boss by the fracture groove Portion.
5. cylindrical lithium ion battery cap as claimed in claim 4, which is characterized in that the middle part of the burst disk with it is described It is connected with laser welding using punching press between the middle part of connection sheet, the middle plane of the plane of the boss and the connection sheet Junction be Laser Welding contact.
6. such as cylindrical lithium ion battery cap described in any one of claim 1 to 5, which is characterized in that the connection sheet is opened Equipped with gas vent, it is empty that the burst disk, the cage ring, the connection sheet are enclosed the air inlet being connected to the gas vent Between.
7. such as cylindrical lithium ion battery cap described in any one of claim 1 to 5, which is characterized in that the sealing ring tool It is useful for supporting the parcel of the connection sheet.
8. such as cylindrical lithium ion battery cap described in any one of claim 1 to 5, which is characterized in that the cage ring tool It is useful for the embedded groove for connection sheet insertion.
9. such as cylindrical lithium ion battery cap described in any one of claim 1 to 5, which is characterized in that the cage ring is logical Hot pressing is crossed to be bonded with the burst disk.
10. such as cylindrical lithium ion battery cap described in any one of claim 1 to 5, which is characterized in that the sealing ring is Plastic rubber ring.
CN201721738757.6U 2017-12-13 2017-12-13 Cylindrical lithium ion battery cap Active CN207676956U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721738757.6U CN207676956U (en) 2017-12-13 2017-12-13 Cylindrical lithium ion battery cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721738757.6U CN207676956U (en) 2017-12-13 2017-12-13 Cylindrical lithium ion battery cap

Publications (1)

Publication Number Publication Date
CN207676956U true CN207676956U (en) 2018-07-31

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ID=62969297

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201721738757.6U Active CN207676956U (en) 2017-12-13 2017-12-13 Cylindrical lithium ion battery cap

Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021006516A1 (en) * 2019-07-08 2021-01-14 삼성에스디아이(주) Secondary battery

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021006516A1 (en) * 2019-07-08 2021-01-14 삼성에스디아이(주) Secondary battery

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