CN206040782U - Explosion -proof valve, apron subassembly and battery - Google Patents
Explosion -proof valve, apron subassembly and battery Download PDFInfo
- Publication number
- CN206040782U CN206040782U CN201620818942.5U CN201620818942U CN206040782U CN 206040782 U CN206040782 U CN 206040782U CN 201620818942 U CN201620818942 U CN 201620818942U CN 206040782 U CN206040782 U CN 206040782U
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- Prior art keywords
- explosion
- proof valve
- proof
- pressure disc
- rupture pressure
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- 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
Abstract
The utility model provides an explosion -proof valve, including base member, rupture membrane and valve bonnet, rupture membrane includes circumferential weld part and the middle portion of opening, be equipped with the pressure release hole on the base member, the weld part welding is in on the base member, make it is in to open a shutoff on the pressure release hole, be equipped with explosion -proof nick in rupture membrane's the portion of opening, the valve bonnet cover is established rupture membrane is last, wherein, explosion -proof nick with still be equipped with the flexible buffer structure between the welding seam between weld part and base member, be equipped with flame retarding construction between rupture membrane and the valve bonnet. The utility model also provides a based on the utility model provides an apron subassembly and the battery of explosion -proof valve. The utility model provides an explosion -proof valve has set up flame retarding construction, when the battery takes place unusual pressure release in time, can effectively completely cut off outside oxygen and get into, prevents the emergence of battery burning and explosion.
Description
Technical field
This utility model is related to field of batteries, and especially the explosion-proof valve on battery cover board assembly, explosion-proof containing this
The cover plate assembly and battery of valve.
Background technology
It is related to battery neck with the progressively development of science and technology, widely applies on automobile, energy storage device, electronic equipment etc.
The safety of battery be increasingly concerned by people, wherein, when cell malfunctions cause it is internal produce a large amount of imflammable gas, make
Inside battery air pressure is significantly raised, if taken measures not in time, may cause battery explosion.
For this purpose, the generation for preventing battery explosion, is generally individually provided with explosion-proof valve on battery cover board（Or claim relief valve）.
Existing explosion-proof valve 6 is general as shown in fig. 1, and including matrix 60 and rupture pressure disc 61, the rupture pressure disc 61 includes the weld part of periphery
610 and periphery in the middle of open portion 611；Described matrix 60 is provided with relief hole 62；The weld part 610 is welded on described matrix
On 60, the open portion 611 is made to block the relief hole 62；The open portion 611 of the rupture pressure disc 6 is provided with explosion-proof indentation
612；When weld part 610 is welded with matrix 60, weld is provided with weld seam 613, fills solder to be welded in weld seam 613.Such as
This, when inside battery air pressure exceedes the Opening pressure of explosion-proof valve 6, explosion-proof valve 6 is opened, and discharges the gas of inside battery, with
Prevent battery explosion.
However, existing explosion-proof valve 6 is in process of production, when which carries out laser welding, 613 both sides of weld seam are all to weld seam
613 shrink, and are easily caused explosion-proof indentation 612 by drawing crack or break, cause explosion-proof valve 6 to fail.Meanwhile, explosion-proof valve 6 was being used
Cheng Zhong, the pressure reduction change inside and outside battery produce impact to explosion-proof valve 6 back and forth, also easily make 6 fatigue failure of explosion-proof valve.And apply
People's discovery in battery research and development and production process, the particularly existing battery with pressure-control explosion-proof valve, the lithium of tertiary cathode material
Ion battery, when internal temperature of battery reaches the thermal runaway temperature of cell positive material, battery is out of control, but its internal pressure
Power is also less, it is impossible to start pressure-control explosion-proof valve, and then, Jing after the temperature rise area of 3-5 seconds, more than 5 seconds, its temperature can rise moment,
Internal pressure moment rises, at this moment, although be provided with the pressure-control explosion-proof valve of one or more layers pressure-control explosion-proof film, and inside battery is produced
A large amount of imflammable gas from pressure-control explosion-proof valve moment spray, however it remains the risk of cells burst or blast.
The content of the invention
For overcoming in prior art explosion-proof valve in process of production, when carrying out laser welding, two lateral weld contraction of weld seam,
Explosion-proof indentation is easily caused by drawing crack or is broken, caused explosion-proof defective valve and yet suffer from asking for cells burst or risk of explosion
Topic, this utility model provide a kind of explosion-proof valve, cover plate assembly and battery.
On the one hand this utility model provides a kind of explosion-proof valve, and including matrix, rupture pressure disc and valve bonnet, the rupture pressure disc includes
The weld part of periphery and the open portion of centre；Described matrix is provided with relief hole；The weld part is welded on the matrix, is made
The open portion is blocked on the relief hole；The open portion of the rupture pressure disc is provided with explosion-proof indentation；The valve bonnet is located at
On the rupture pressure disc, wherein, flexible buffer knot is additionally provided between the explosion-proof indentation and the weld seam between the weld part and matrix
Structure；Flame retarding construction is provided between the rupture pressure disc and valve bonnet.
Further, matrix is provided between the side of installation step, the weld part and the installation step and forms weldering
Seam.
Further, the flexible buffer structure is annular.
Further, the flexible buffer structure includes more than one crest and/or trough.
Further, the flexible buffer structure includes a crest and trough.
Further, the weld part thickness of the rupture pressure disc is 0.2-0.8mm, and the open portion thickness of the rupture pressure disc is
0.05-0.15mm。
Further, the height between the crest and/or trough and open portion surface is the 1-8 of the open portion thickness
Times.
Further, rupture pressure disc is located at the inner of the relief hole, and the valve bonnet is located at the outer end of the relief hole, institute
State flame retarding construction to be located in relief hole.
Further, the flame retarding construction is the microencapsulation for including fire retardant.
This utility model second aspect provides a kind of cover plate assembly, and including cover board body, the cover board body is provided with
Above-mentioned explosion-proof valve.
This utility model third aspect provides a kind of battery, and the battery includes shell, pole piece and cover plate assembly, described
Cover plate assembly and shell form closing space, and the pole piece is installed in the closing space.
This utility model provide explosion-proof valve, which increased flexible buffer structure on rupture pressure disc, can be prevented effectively from into
Explosion-proof indentation drawing crack or break that during row laser welding, the contraction of weld seam both sides is caused, it is ensured that the finished product of explosion-proof valve in production process
Rate.Meanwhile, using above-mentioned flexible buffer structure, the concordance and reliability of the startup pressure of explosion-proof valve can be greatly improved,
The fatigue performance of explosion-proof valve can be lifted well, meanwhile, be provided with flame retarding construction on rupture pressure disc, when cell internal pressure it is different
Chang Shi, rupture pressure disc are opened, and in the presence of flame retarding construction, explosion-proof valve is in ischaemia state, and the high temperature that battery sprays is flammable
Material is difficult to catch fire under conditions of ischaemia, thus, explosion-proof valve energy pressure release in time when battery is abnormal, effectively completely cuts off outside
Oxygen is entered, and prevents the generation of cells burst and blast, it is to avoid cause secondary disaster and bigger exception.
Description of the drawings
Fig. 1 is the explosion-proof valve generalized section provided in prior art.
Fig. 2 is the battery schematic perspective view provided in this utility model specific embodiment.
Fig. 3 is a kind of explosion-proof valve generalized section provided in this utility model specific embodiment.
Fig. 4 is the generalized section after removing flame retarding construction in Fig. 3.
Wherein, 1, cover board body；2nd, shell；3rd, first electrode component；4th, second electrode component；5th, fluid injection escutcheon；6th, prevent
Quick-fried valve；60th, matrix；61st, rupture pressure disc；62nd, relief hole；63rd, valve bonnet；601st, installation step；610th, weld part；611st, open portion；
612nd, explosion-proof indentation；613rd, weld seam；614th, crest；615th, trough;64th, flame retarding construction.
Specific embodiment
In order that technical problem, technical scheme and beneficial effect that this utility model is solved become more apparent, below
With reference to drawings and Examples, this utility model is further elaborated.It should be appreciated that described herein be embodied as
Example only to explain this utility model, is not used to limit this utility model.
Embodiment
This example will carry out specific explanations explanation to battery, cover plate assembly and explosion-proof valve 6 disclosed in this utility model.
As shown in Fig. 2 this example discloses a kind of battery, the battery includes shell 2, pole piece and cover plate assembly, the lid
Board component and shell 2 form closing space, and the pole piece is installed in the closing space.Battery in this example can for lithium from
Sub- battery, or other kinds of nickel-based battery etc..The pole piece is by positive plate, barrier film, negative plate winding or is stacked shape
Into which is public domain.Wherein, above-mentioned cover plate assembly includes cover board body 1, is provided with explosion-proof valve 6 on the cover board body 1.
Wherein, the also different first electrode component 3 of insulating mounting polarized and second electrode component 4 typically on cover plate assembly.First
Electrode assemblie 3 generally comprises first electrode and the first insulating part etc., and the first insulating part makes first electrode and cover board body 1 insulate；
Second electrode component 4 generally comprises second electrode and the second insulating part etc., and the second insulating part makes second electrode and cover board body 1 exhausted
Edge；When above-mentioned first electrode is positive pole, then second electrode is negative pole, conversely, when first electrode is negative pole, then second electrode is for just
Pole.Wherein, its positive pole is electrically connected with the positive plate of pole piece, and negative pole is electrically connected with the negative plate of pole piece.Typically in the cover board body 1
On be additionally provided with liquid injection hole, be covered with liquid injection hole cover 5 on liquid injection hole.
As the structure beyond explosion-proof valve 6 on this example cover plate assembly not to battery is improved, therefore, it is only right below
The structure of its explosion-proof valve 6 carries out specific explanations explanation.
As shown in Figure 3 and Figure 4, the explosion-proof valve 6 that this example is provided includes matrix 60 and rupture pressure disc 61, and the rupture pressure disc 61 includes
The weld part 610 of periphery and middle open portion 611；Described matrix 60 is provided with relief hole 62；The weld part 610 is welded on
In described matrix 60, the open portion 611 is made to block on the relief hole 62；Set in the open portion 611 of the rupture pressure disc 61
There is explosion-proof indentation 612；Explosion-proof valve 6 also includes valve bonnet 63, is provided with flame retarding construction 64 between rupture pressure disc 61 and valve bonnet 63.This is fire-retardant
Structure 64 prevents external oxygen from entering when explosion-proof valve 6 opens pressure release, can effectively prevent inside battery that burning or quick-fried occurs
It is fried.
As rupture pressure disc 61 is arranged on by the way of welding on matrix 60, when rupture pressure disc 61 it is very tight when,
Rupture pressure disc 61 is easily damaged in welding process, therefore, the explosion-proof indentation 612 and the weldering between the weld part 610 and matrix 60
Seam 613（As shown in Figure 3 and Figure 4）Between be additionally provided with flexible buffer structure.Flexible buffer structure effectively can be alleviated due to welding
When 61 drawing crack of caused rupture pressure disc or break.
Wherein, for welding with matrix 60, open portion 611 then mainly realizes which is prevented to the weld part 610 of above-mentioned rupture pressure disc 61
Quick-fried function, its thickness are thinner generally relative to weld part 610, will rupture pressure disc 61 middle part it is ironed after formed open portion 611.
Specifically, as shown in figure 3, described matrix 60 is provided with installation step 601, the weld part 610 and the installation
Weld seam 613 is formed between the side of step 601；The weld part 610 is welded on by the installation step 601 by weld seam 613
It is interior.Welding can be Laser Welding or soldering.60 one side of matrix is used for installing the installation carrier of rupture pressure disc 61, in addition,
For welding with cover board body 1（Or also may be installed on shell 2, it is selectively mounted in this example on cover board body 1）, or should
Matrix 60 also can be with 1 integrated punching molding of cover board body, itself part as cover board body 1.I.e. the matrix 60 can be
The structure mutually independent with cover board body 1 or shell 2, or, it is also possible to it is integrally formed out on cover board body 1 or shell 2
Matrix 60, in other words, namely cover board body 1 or shell 2 are used as the matrix 60 of explosion-proof valve 6.
So-called flexible buffer structure, refers to the structure with the deformation of certain buffering, and which is integrally formed on rupture pressure disc 61.It is anti-
When quick-fried film 61 is welded in installation process, although 613 two ends of weld seam still can be shunk to weld seam 613, but due to there is the flexibility to delay
Rush the presence of structure so as to can extend at weld seam 613 at flexible buffer structure, so so that in welding process, not
The infringement that drawing crack can be caused to rupture pressure disc 61 or broken.Meanwhile, in use, even if the pressure reduction inside and outside battery becomes
Change and impact is produced to explosion-proof valve 6 back and forth, due to the presence for having the flexible buffer structure, in its 61 Opening pressure scope of rupture pressure disc
It is interior, can effectively alleviate the pressure reduction change inside and outside its battery and impact is produced to explosion-proof valve 6 back and forth, prevent explosion-proof valve 6 from failing.
Wherein, the material of rupture pressure disc 61 can adopt aluminium foil well-known to those skilled in the art, or other
Material known to art personnel.
In this example, the position of its flexible buffer structure setting is not specifically limited, as preferred mode, as shown in figure 4,
The flexible buffer structure setting is between the explosion-proof indentation 612 and the weld seam 613.
Specifically, the flexible buffer structure is annular.With regard to the shape and size of flexible buffer structure, especially do not limit
It is fixed, as long as which is can guarantee that in welding process, rupture pressure disc 61 will not be damaged, the design of rupture pressure disc 61 will not be affected again to open pressure
Power.Such as, the flexible buffer structure includes more than one crest 614 and/or trough 615.In this example, the flexibility
Buffer structure includes a crest 614 and trough 615.610 thickness of weld part of the rupture pressure disc 61 is 0.2-0.8mm, described
611 thickness of open portion of rupture pressure disc 61 is 0.05-0.15mm.
Meanwhile, the height and width of the crest 614 and/or trough 615 are not specially limited, and applicant is in R＆D process
It was found that, by taking the above-mentioned flexible buffer structure with a crest 614 and a trough 615 as an example, the crest 614 and trough
Height between 615 and 611 surface of open portion is 1-8 times of 611 thickness of the open portion more reasonable.It is further preferred that institute
State that the height between crest 614 and trough 615 and 611 surface of open portion is 611 thickness of the open portion 1-5 times.This place
The height of meaning, refers to the lowest point of the highest point of crest 614 relative to the upper surface and trough 615 of open portion 611 relative to opening
Open the distance between the lower surface in portion 611.
With regard to the specific configuration and material of above-mentioned flame retarding construction 64, it is not particularly limited, as long as which can make internal combustibility
Gas is leaked out by the flame retarding construction 64 in time, while and anaerobic condition can be formed at flame retarding construction 64, make external oxygen
Gas can not be entered wherein.Such as, the inside of flame retarding construction 64 has space（Or hole）Deng thus, internal internally
In the case that pressure is larger, the imflammable gas of inside battery is leaked out by above-mentioned space in time, and oxygen is difficult
To enter inside battery by space.
Wherein, contain fire retardant in the flame retarding construction 64.The fire retardant can be solid powder, the fire-retardant knot
Structure 64 by solid powder fire retardant is compressed, formed after jolt ramming.Or, the flame retarding construction is include fire retardant miniature
Capsule.It is mixed that the fire retardant includes that organic fire-retardant, inorganic combustion inhibitor or inorganic combustion inhibitor and organic fire-retardant are mixed to form
Close fire retardant.Wherein, the organic fire-retardant includes that halogenated flame retardant, phosphorus flame retardant, nitrogenated flame retardant, phosphorus-halogen system are fire-retardant
One or more in agent.The inorganic combustion inhibitor includes antimony oxide, magnesium hydroxide, aluminium hydroxide, in silicon systems oxide
One or more.The mixing fire retardant is mixed by the organic fire-retardant and inorganic combustion inhibitor of above-mentioned offer, such as, this
In example, there is provided the mixing fire retardant after a kind of improvement, the flame retardant agent include red phosphorus, aluminium hydroxide and expansile graphite.
Above-mentioned valve bonnet 63 is arranged on matrix 60, for preventing external force from causing to damage to explosion-proof valve 6, is had on general valve bonnet 63
There is air-vent the gas for discharging is opened for excluding explosion-proof valve.Specifically, rupture pressure disc 61 is located at the inner of the relief hole 62, institute
The outer end that valve bonnet 63 is located at the relief hole 62 is stated, the flame retarding construction 64 is located in relief hole 62.
The explosion-proof principle of the battery with explosion-proof valve 6 is as follows：Cause pressure rise when exception occurs in inside battery, work as inside
When air pressure increases to the Opening pressure of rupture pressure disc 61, rupture pressure disc 61 is opened from its explosion-proof indentation 61.Now, due to there is fire-retardant knot
The presence of structure 64, realizes anti-flaming function at the explosion-proof valve 6, and isolation external oxygen is entered in battery, effectively prevents battery
Burning and the accident exploded.
The explosion-proof valve 6 of this example offer, cover plate assembly and the battery including cover plate assembly that explosion-proof valve 6 is installed, due to
Explosion-proof valve 6 after which improves increased flexible buffer structure on rupture pressure disc 61, and therefore, it can be prevented effectively from carries out laser welding
When 613 both sides of weld seam shrink 612 drawing crack of explosion-proof indentation that causes or break, it is ensured that the yield rate of explosion-proof valve 6 in production process.
Meanwhile, using above-mentioned flexible buffer structure, the concordance and reliability of the startup pressure of explosion-proof valve 6 can be greatly improved, while
Also the fatigue performance of explosion-proof valve 6 can be lifted well, meanwhile, flame retarding construction is provided with rupture pressure disc, when inside battery pressure
When power is abnormal, rupture pressure disc is opened, and in the presence of flame retarding construction, explosion-proof valve is in ischaemia state, the high temperature that battery sprays
Combustible is difficult to catch fire under conditions of ischaemia, thus, explosion-proof valve can pressure release in time, effectively isolation when battery is abnormal
External oxygen is entered, and prevents the generation of cells burst and blast, it is to avoid cause secondary disaster and bigger exception.
Preferred embodiment of the present utility model is the foregoing is only, it is not to limit this utility model, all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in this utility model
Protection domain within.
Claims (11)
1. a kind of explosion-proof valve, including matrix, rupture pressure disc and valve bonnet, the rupture pressure disc includes the unlatching of the weld part of periphery and centre
Portion；
Described matrix is provided with relief hole；The weld part is welded on the matrix, the open portion closure is let out described
On pressure hole；The open portion of the rupture pressure disc is provided with explosion-proof indentation；
The valve bonnet is located on the rupture pressure disc,
Characterized in that, being additionally provided with flexible buffer structure between the explosion-proof indentation and the weld seam between the weld part and matrix；
Flame retarding construction is provided between the rupture pressure disc and valve bonnet.
2. explosion-proof valve according to claim 1, it is characterised in that described matrix is provided with installation step, the weld part
Weld seam is formed and the side of the installation step between.
3. explosion-proof valve according to claim 1, it is characterised in that the flexible buffer structure is annular.
4. explosion-proof valve according to claim 3, it is characterised in that the flexible buffer structure includes more than one crest
And/or trough.
5. explosion-proof valve according to claim 4, it is characterised in that the flexible buffer structure includes a crest and ripple
Paddy.
6. explosion-proof valve according to claim 4, it is characterised in that the weld part thickness of the rupture pressure disc is 0.2-0.8mm,
The open portion thickness of the rupture pressure disc is 0.05-0.15mm.
7. explosion-proof valve according to claim 6, it is characterised in that between the crest and/or trough and open portion surface
Height be 1-8 times of the open portion thickness.
8. explosion-proof valve according to claim 1, it is characterised in that the rupture pressure disc is located at the inner of the relief hole, institute
The outer end that valve bonnet is located at the relief hole is stated, the flame retarding construction is located in relief hole.
9. explosion-proof valve according to claim 1, it is characterised in that the flame retarding construction is the miniature glue for including fire retardant
Capsule.
10. a kind of cover plate assembly, including cover board body, it is characterised in that the cover board body is appointed in being provided with claim 1-9
Explosion-proof valve described in meaning one.
A kind of 11. batteries, it is empty that the battery includes that shell, pole piece and cover plate assembly, the cover plate assembly and shell form closing
Between, the pole piece is installed in the closing space；Characterized in that, the cover plate assembly is the cover plate described in claim 10
Component.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620818942.5U CN206040782U (en) | 2016-07-29 | 2016-07-29 | Explosion -proof valve, apron subassembly and battery |
| EP17833514.7A EP3477733A1 (en) | 2016-07-29 | 2017-07-24 | Explosion-proof valve, cover plate assembly, and battery |
| US16/321,402 US20200112010A1 (en) | 2016-07-29 | 2017-07-24 | Explosion-proof valve, cover plate assembly, and battery |
| PCT/CN2017/094176 WO2018019211A1 (en) | 2016-07-29 | 2017-07-24 | Explosion-proof valve, cover plate assembly, and battery |
| KR1020197002833A KR102172100B1 (en) | 2016-07-29 | 2017-07-24 | Explosion-proof valve, cover plate assembly and battery |
| JP2019504719A JP6775078B2 (en) | 2016-07-29 | 2017-07-24 | Explosion-proof valve, lid assembly and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620818942.5U CN206040782U (en) | 2016-07-29 | 2016-07-29 | Explosion -proof valve, apron subassembly and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206040782U true CN206040782U (en) | 2017-03-22 |
Family
ID=58307769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620818942.5U Active CN206040782U (en) | 2016-07-29 | 2016-07-29 | Explosion -proof valve, apron subassembly and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206040782U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107611313A (en) * | 2017-10-07 | 2018-01-19 | 珠海市至力电池有限公司 | Button cell Explosion-proof cap |
| WO2018019211A1 (en) * | 2016-07-29 | 2018-02-01 | 比亚迪股份有限公司 | Explosion-proof valve, cover plate assembly, and battery |
| CN111446387A (en) * | 2019-01-16 | 2020-07-24 | 武汉市杰精精密电子有限公司 | Battery explosion-proof cover plate suitable for stamping manufacturing and automatic welding |
| CN112886132A (en) * | 2019-11-29 | 2021-06-01 | 比亚迪股份有限公司 | Battery with a battery cell |
| WO2022088828A1 (en) * | 2020-10-29 | 2022-05-05 | 深圳市比克动力电池有限公司 | Full-tab cylindrical lithium battery cap and full-tab cylindrical lithium battery |
| CN114937849A (en) * | 2022-03-28 | 2022-08-23 | 江苏正力新能电池技术有限公司 | Explosion-proof valve, battery cover plate assembly and power battery |
| CN114944530A (en) * | 2022-06-30 | 2022-08-26 | 凤凰新能源(惠州)有限公司 | Flame-retardant and explosion-proof polymer lithium ion battery |
| CN117638394A (en) * | 2024-01-25 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Single battery and battery pack |
| WO2024055257A1 (en) * | 2022-09-15 | 2024-03-21 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical apparatus |
-
2016
- 2016-07-29 CN CN201620818942.5U patent/CN206040782U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018019211A1 (en) * | 2016-07-29 | 2018-02-01 | 比亚迪股份有限公司 | Explosion-proof valve, cover plate assembly, and battery |
| CN107611313A (en) * | 2017-10-07 | 2018-01-19 | 珠海市至力电池有限公司 | Button cell Explosion-proof cap |
| CN111446387A (en) * | 2019-01-16 | 2020-07-24 | 武汉市杰精精密电子有限公司 | Battery explosion-proof cover plate suitable for stamping manufacturing and automatic welding |
| CN112886132A (en) * | 2019-11-29 | 2021-06-01 | 比亚迪股份有限公司 | Battery with a battery cell |
| CN112886132B (en) * | 2019-11-29 | 2021-11-12 | 比亚迪股份有限公司 | Battery with a battery cell |
| WO2022088828A1 (en) * | 2020-10-29 | 2022-05-05 | 深圳市比克动力电池有限公司 | Full-tab cylindrical lithium battery cap and full-tab cylindrical lithium battery |
| CN114937849A (en) * | 2022-03-28 | 2022-08-23 | 江苏正力新能电池技术有限公司 | Explosion-proof valve, battery cover plate assembly and power battery |
| CN114944530A (en) * | 2022-06-30 | 2022-08-26 | 凤凰新能源(惠州)有限公司 | Flame-retardant and explosion-proof polymer lithium ion battery |
| WO2024055257A1 (en) * | 2022-09-15 | 2024-03-21 | 宁德时代新能源科技股份有限公司 | Battery cell, battery, and electrical apparatus |
| CN117638394A (en) * | 2024-01-25 | 2024-03-01 | 蜂巢能源科技股份有限公司 | Single battery and battery pack |
| CN117638394B (en) * | 2024-01-25 | 2024-04-12 | 蜂巢能源科技股份有限公司 | Single battery and battery pack |
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