CN208111497U - Secondary cell top cover and its secondary cell - Google Patents
Secondary cell top cover and its secondary cell Download PDFInfo
- Publication number
- CN208111497U CN208111497U CN201820618347.6U CN201820618347U CN208111497U CN 208111497 U CN208111497 U CN 208111497U CN 201820618347 U CN201820618347 U CN 201820618347U CN 208111497 U CN208111497 U CN 208111497U
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- Prior art keywords
- thickness
- coping plate
- secondary cell
- pole
- rotating sheet
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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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model provides a kind of secondary cell top cover, including：Coping plate and the first electrode unit, second electrode unit and rotating sheet for being set to coping plate, first electrode unit includes the first pole and the resistance for being set to the first pole, first pole is electrically connected by resistance with coping plate, second electrode unit includes the second pole and the conductive sheet that is electrically connected with the second pole, second pole and coping plate insulation are assembled, rotating sheet is electrically connected coping plate, conductive sheet is located at the top of rotating sheet, first insulating part is set between conductive sheet and coping plate, fluted, the first insulating part covering groove is arranged around rotating sheet for coping plate.Coping plate can store electrolyte around the groove of rotating sheet setting, avoid when carrying out injecting electrolytic solution, and electrolyte penetrates on rotating sheet from the gap between the first insulating part and coping plate and influences the overturning sensitivity of rotating sheet and short-circuit resistance is caused to become larger.
Description
Technical field
The utility model relates to energy storage instrument field more particularly to a kind of secondary cell top covers and its secondary cell.
Background technique
The driving power of modern society, more and more electric tools and the new energy vehicles is towards high capacity, Gao An
The direction of full property is developed, and battery is widely used in electric tool and the new energy vehicles with good characteristics such as its high capacity
In.These batteries should also have good safety to can be only achieved the standard used and meet people other than with high capacity
Demand.
In order to guarantee the safety of secondary cell, rotating sheet is installed on some battery caps in the prior art, and pass through
Resistance is set and is electrically connected first electrode and coping plate, thus in battery because overcharging or electrolyte reacts equal accident due to leads to two
When primary cell air pressure inside is more than preset value, rotating sheet carries out overturning and is electrically connected with second electrode, by the movement of rotating sheet with
The electrical connection of resistance, thus extrinsic current can be formed between first electrode, coping plate and second electrode, stop overcharging, pass through
Resistance slowly cross flow heat dissipation the energy inside secondary cell is released, thus will not overcharge, is on fire, explosion etc. danger
Danger, to improve the security performance of secondary cell.
In order to guarantee beauty and prevent conductive sheet from contacting with coping plate, it will usually be arranged between conductive sheet and coping plate
One insulating part, but since the first insulating part is generally plastic materials, binding force is limited between the coping plate of metal material,
Gap inevitably is formed between coping plate and the first insulating part, when carrying out fluid injection to battery, is remained on coping plate
Electrolyte can be penetrated on rotating sheet by gap, the infiltration of electrolyte will affect the mechanical performance of rotating sheet, be allowed to overturn
Sensitivity decrease, while can also considerably increase short-circuit resistance, so that the extrinsic current to be formed is become smaller and affected flow heat dissipation effect
Fruit reduces safety coefficient.
Therefore, it is badly in need of providing safety problem of the new cap structure of one kind to solve secondary cell.
Utility model content
The purpose of this utility model is that providing a kind of secondary cell top cover and its secondary in view of the deficiencies of the prior art
Battery can prevent electrolyte from penetrating on rotating sheet, to improve the security performance of secondary cell.
A kind of in order to achieve the above object, the utility model provides secondary cell top cover, including：Coping plate and it is set to top
First electrode unit, second electrode unit and the rotating sheet of cover plate, first electrode unit include the first pole and are set to first
The resistance of pole, the first pole are electrically connected by resistance with coping plate, second electrode unit including the second pole and with the second pole
The conductive sheet of column electrical connection, the second pole and coping plate insulation are assembled, and rotating sheet is electrically connected coping plate, and conductive sheet is located at rotating sheet
Top, the first insulating part is set between conductive sheet and coping plate, and fluted, the first insulating part is arranged around rotating sheet in coping plate
Cover groove.
As an embodiment, the shortest distance of groove and rotating sheet is greater than 0.5mm, that is to say, that groove is kept and rotating sheet
A certain distance, to prevent the electrolyte stored in groove, water etc. from contacting rotating sheet.
As an embodiment, rotating sheet has interconnecting piece, and interconnecting piece connects coping plate, and coping plate, which is equipped with, has different-thickness
And first thickness portion, second thickness portion and the third thickness being sequentially connected, the first insulating part connect and cover with first thickness portion
The thickness of lid second thickness portion and third thickness, second thickness portion is less than third thickness and forms groove, third thickness
It is fixedly connected with interconnecting piece.
As an embodiment, rotating sheet has interconnecting piece, and interconnecting piece connects coping plate, and coping plate, which is equipped with, has different-thickness
And first thickness portion, second thickness portion, third thickness and the 4th thickness being sequentially connected, the first insulating part and first thickness
Portion connects and covers second thickness portion, third thickness and the 4th thickness, and the thickness in second thickness portion is less than third thickness
And groove is formed, the thickness of the 4th thickness is less than third thickness and is fixedly connected with interconnecting piece.
As an embodiment, the sectional area edge direction far from first insulating part parallel with the first insulating part of groove is gradually
Become smaller, the depth of groove is no more than the 2/3 of the thickness of coping plate.
As an embodiment, groove is overlooked into " returning " font, and groove is located at the lower section at the edge of the first insulating part.
As an embodiment, the first insulating part is equipped with rotating sheet receiving hole, and the air pressure inside of secondary cell is more than preset value
When, rotating sheet is overturn and protrudes into rotating sheet receiving hole and contacted with conductive sheet.The overturning ability and preset pressure of rotating sheet
Value corresponds to, and when the air pressure inside of battery is more than preset value, rotating sheet is overturn and protrudes into the rotating sheet appearance of the first insulating part
Kong Zaiyu conductive sheet of receiving contact, that is to say, that rotating sheet is electrically connected with second electrode, because first electrode passes through resistance and top cover
Piece electrical connection, it is possible to extrinsic current is formed between first electrode, coping plate and second electrode, it is slowly excessively wandering by resistance
Heat releases the energy inside secondary cell, thus will not overcharge, is on fire, explosion etc. danger, thus improve it is secondary
The security performance of battery.
As an embodiment, the first mounting hole and the second mounting hole, the first pole insulated enclosure peace are provided on coping plate
Loaded in the first mounting hole, the second pole insulated enclosure is installed in the second mounting hole.Secondary cell top cover further includes sealing ring,
Sealing ring is respectively sleeved on the first pole and the second pole and is respectively accommodated in the first mounting hole and the second mounting hole, and makes
First pole and the second pole are electrically insulated with coping plate respectively.
As an embodiment, third mounting hole is additionally provided on coping plate, third mounting hole is equipped with explosion-proof valve, explosion-proof valve
Top is equipped with explosion-proof valve screening glass.When battery due to improper use, be exposed in adverse circumstances when, the battery of high-energy will produce
Raw a large amount of gas and temperature sharply increases, gas washes explosion-proof valve open and achievees the purpose that pressure release, to improve the peace of battery
Full performance.And explosion-proof valve screening glass is mainly for preventing exotic from puncturing explosion-proof valve or exotic is located on explosion-proof valve and influences
The pressure release purpose of explosion-proof valve.
The utility model additionally provides a kind of secondary cell, shell and above-mentioned secondary electricity including battery core, receiving battery core
Pond top cover.
The coping plate of the utility model around rotating sheet be arranged it is fluted, the first insulating part cover groove, thus into
When row injecting electrolytic solution, the electrolyte penetrated into from the gap between the first insulating part and coping plate can be stored into groove, because
It avoids electrolyte to penetrate on rotating sheet and influence the overturning sensitivity of rotating sheet and short-circuit resistance is caused to become larger, while can also
It prevents the grit in atmosphere, water etc. from entering rotating sheet and influences the use of rotating sheet.Thus pass through the top cover of the utility model
Structure, can be when the air pressure inside of secondary cell be more than preset value, and rotating sheet, which effectively carries out overturning, makes first electrode and second
Electrode is electrically connected to form external short circuit, then slowly crosses flow heat dissipation by small short-circuit resistance and discharge the energy inside secondary cell
Out, to will not overcharge, is on fire, the danger such as explosion, and the security performance of secondary cell is improved.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the secondary cell of the utility model.
Fig. 2 is the cross-sectional view of the utility model secondary cell top cover.
Fig. 3 is the perspective view of coping plate.
Fig. 4 is the enlarged drawing of encircled portion in Fig. 2.
Fig. 5 is the enlarged drawing of another embodiment of encircled portion in Fig. 2.
Fig. 6 is the enlarged drawing of the another embodiment of encircled portion in Fig. 2.
Specific embodiment
Illustrate the secondary cell top cover and its secondary cell of the utility model with reference to the accompanying drawing.
Referring to Fig.1~3, secondary cell includes secondary cell top cover 1, battery core 2 and the shell 3 for accommodating battery core, note in shell
There is the secondary cell electrolyte (not shown) of infiltration battery core.Secondary cell top cover 1 includes coping plate 13, and setting is being pushed up
First electrode unit 11, second electrode unit 12, rotating sheet 14, liquid injection hole 18 and explosion-proof valve 20 on cover plate 13.Coping plate 13
It is equipped with rotating sheet fixation hole 131, the first mounting hole 136, the second mounting hole 137 and third mounting hole 138, first electrode unit
11 insulated enclosures are installed in the first mounting hole 136, and 12 insulated enclosure of second electrode unit is installed in the second mounting hole 137,
Third mounting hole 138 is equipped with explosion-proof valve 20, and the top of explosion-proof valve 20 is equipped with explosion-proof valve screening glass 19.
First electrode unit 11 is usually anode, and second electrode unit 12 is usually cathode.As shown in Fig. 2, first electrode
Unit 11 includes aluminium riveting block 111, resistance 112 and the first pole 113.First pole 113 and aluminium riveting block 111 can be split type
Structure is also an integral structure.For accurately, when the first pole 113 is the pole with boss, the first pole 113 and aluminium
Riveting block 111 is split type structure, and when the first pole 113 is cylindrical body pole, the first pole 113 and aluminium riveting block 111 can
For split type structure or it is an integral structure.Resistance 112 has mounting hole (not shown), and resistance 112 passes through mounting hole set
On the first pole 113, to realize being electrically connected for the first pole 113 and coping plate 13.First pole 113 is arranged in first
In mounting hole 136, sealing ring 16 is set on the first pole 113 and is contained in the first mounting hole 136, to make the first pole
113 carry out insulation assembly with coping plate 13.The second insulating part 17 is equipped between first pole 113 and the lower end of coping plate 13, the
One pole 113 and the positive plate of battery core 2 are electrically connected.
As shown in Fig. 2, Fig. 4~6, second electrode unit 12 includes the second pole 122, is electrically connected with the second pole 122
Conductive sheet 121 and the second pole boss 123.Second pole 122, conductive sheet 121 and the second pole boss 123 can all be split type
Structure also connectable the two is an integral structure and another is split type structure.For accurately, when conductive sheet 121 uses
When split type structure is separate structure with the second pole 122, the second pole 122 and the second pole boss 123 can be integral type
Structure or split type structure, when conductive sheet 121 and the second pole 122 are structure as a whole, the second pole 122 and the second pole are convex
Platform 123 is split type structure.Second pole 121 is arranged in the second mounting hole 137, and sealing ring 16 is set in the second pole 122
It goes up and is contained in the second mounting hole 137, so that the second pole 122 be made to carry out insulation assembly with coping plate 13.Second pole is convex
The second insulating part 17 is equipped between platform 123 and coping plate 13, the second pole boss 123 and the negative electrode tab of battery core 2 are electrically connected.
The first insulating part 15 is equipped between conductive sheet 121 and coping plate 13, conductive sheet 121 is located at the top of rotating sheet 14, rotating sheet 14
Rotating sheet fixation hole 131 is electrically connected and is set to coping plate 13, and rotating sheet 14 has interconnecting piece 141, and the connection of interconnecting piece 141 is turned over
Rotor fixation hole 131.Rotating sheet 14 can be stamped and formed out by coping plate 13, i.e., rotating sheet 14 and coping plate 13 are integrally formed, because
And rotating sheet fixation hole 131 is not present in coping plate 13；Rotating sheet 14 and coping plate 13 can also be turned over by the way that interconnecting piece 141 to be welded in
Rotor fixation hole 131 and connect.First insulating part 15 is equipped with rotating sheet receiving hole 15c, and the air pressure inside of secondary cell is more than pre-
If rotating sheet 14 is overturn and protrudes into rotating sheet receiving hole 15c and contacted with conductive sheet 121, that is to say, that rotating sheet 14 when value
It is electrically connected with the second pole 122, because the first pole 113 is electrically connected by resistance 112 with coping plate 13, it is possible to first
Extrinsic current is formed between electrode unit 11, coping plate 13 and second electrode unit 12, stops overcharging, slowly by external resistance
Flow heat dissipation is crossed to release the energy inside secondary cell, thus will not overcharge, is on fire, explosion etc. danger, to mention
The security performance of high secondary cell.
As figures 2-6, coping plate 13 is arranged fluted 130 around rotating sheet 14, and the first insulating part 15 covers groove
130, groove 130 is located at the lower section at the edge of the first insulating part 15, and groove 130 and the shortest distance of rotating sheet 14 are greater than 0.5mm.
Thus when carrying out injecting electrolytic solution, between the first insulating part 15 and coping plate 13 gap infiltration electrolyte can store to
In groove 130, penetrates on rotating sheet 14 because avoiding electrolyte and influence the overturning sensitivity of rotating sheet 14 and cause short
Road resistance becomes larger, while entering rotating sheet 14 prevented also from grit, the water etc. in atmosphere and influencing the use of rotating sheet 14.
As shown in figure 4, coping plate 13 is equipped with different-thickness and the first thickness portion 132 being sequentially connected, second thickness
Portion 133 and third thickness 134, the first insulating part 15 connect with first thickness portion 132 and cover second thickness portion 133 and third
The thickness of thickness 134, second thickness portion 133 is less than third thickness 134 and forms groove 130, and third thickness 134 is fixed
Connect interconnecting piece 141.Third thickness 134 can be fixedly connected with interconnecting piece 141 by welding.When coping plate 13 is relatively thin
When, coping plate should not be divided into according to thickness compared with multilayer, to avoid its when subsequent injecting electrolytic solution or fixture are melted into because of stress
And it deforms.
Certain coping plate 13 is not limited only to a kind of above-mentioned structure, as another embodiment of coping plate 13, such as Fig. 3 and figure
Shown in 5, coping plate 13 is equipped with different-thickness and the first thickness portion 132 being sequentially connected, second thickness portion 133, third thickness
Degree portion 134 and the 4th thickness 135, the first insulating part 15 connect with first thickness portion 132 and cover second thickness portion 133,
The thickness of three thicknesses 134 and the 4th thickness 135, second thickness portion 133 is less than third thickness 134 and forms groove 130,
The thickness of 4th thickness 135 is less than third thickness 134 and is fixedly connected with interconnecting piece 141.When thicker for coping plate thickness,
Coping plate 13 can be set as to multilayered structure, and the thickness connecting with interconnecting piece 141 may be configured as lower thickness, to keep foot
Enough spaces overturn rotating sheet 14 flexibly.
As another embodiment of groove 130, as shown in fig. 6, the sectional area parallel with the first insulating part 15 of groove 130
It is gradually become smaller along the direction far from the first insulating part 15, and the depth of groove 130 is no more than the 2/3 of 13 thickness of coping plate.It is such
Design can make the receiving volume of groove 130 become larger, and be easier to slide into electrolyte, grit, water etc. in groove 130.
Continue as shown in figure 3, groove 130 is overlooked into " returning " font, and surrounds rotating sheet fixation hole 131 and the second mounting hole
137, it also means that, groove 130 can not only accommodate coping plate 13 and the first insulating part 15 close to 18 side of liquid injection hole
Electrolyte, grit, water for penetrating into gap etc. can also be accommodated and be penetrated into coping plate 13 and the other gaps of the first insulating part 15
, grit, water etc., and electrolyte, grit, the water etc. that penetrate into the gap close to 18 side of liquid injection hole can also be to " returning " fonts
Groove 130 be filled, thus considerably increase the receiving volume of groove 130.
It should be pointed out that the above specific embodiment is merely to illustrate the utility model rather than limits the utility model
Range, after having read the utility model, those skilled in the art are equal to the modification of the various equivalent forms of the utility model
Fall into the application range defined in the appended claims.
Claims (10)
1. a kind of secondary cell top cover, including：Coping plate and first electrode unit, the second electrode list for being set to the coping plate
Member and rotating sheet, the first electrode unit include the first pole and the resistance for being set to first pole, first pole
Column is electrically connected by the resistance with the coping plate, the second electrode unit including the second pole and with second pole
The conductive sheet of electrical connection, second pole and coping plate insulation are assembled, and the rotating sheet is electrically connected the coping plate, institute
The top that conductive sheet is located at the rotating sheet is stated, the first insulating part, feature are set between the conductive sheet and the coping plate
It is, fluted, the first insulating part covering groove is arranged around the rotating sheet for the coping plate.
2. secondary cell top cover according to claim 1, which is characterized in that the most short distance of the groove and the rotating sheet
From greater than 0.5mm.
3. secondary cell top cover according to claim 1, which is characterized in that the rotating sheet has interconnecting piece, the company
Socket part connects the coping plate.
4. secondary cell top cover according to claim 3, which is characterized in that the coping plate be equipped with different-thickness and
First thickness portion, second thickness portion and the third thickness being sequentially connected, first insulating part are connect simultaneously with first thickness portion
Cover the second thickness portion and the third thickness, the thickness in second thickness portion shape less than the third thickness
At the groove, the third thickness is fixedly connected with the interconnecting piece.
5. secondary cell top cover according to claim 3, which is characterized in that the coping plate be equipped with different-thickness and
First thickness portion, second thickness portion, third thickness and the 4th thickness being sequentially connected, first insulating part and the first thickness
Degree portion connects and covers the second thickness portion, the third thickness and the 4th thickness, the second thickness portion
Thickness is less than the third thickness and forms the groove, the thickness of the 4th thickness be less than the third thickness and
It is fixedly connected with the interconnecting piece.
6. secondary cell top cover according to claim 1, which is characterized in that the groove is put down with first insulating part
Capable sectional area gradually becomes smaller along the direction far from first insulating part.
7. secondary cell top cover according to claim 6, which is characterized in that the depth of the groove is no more than the top cover
The 2/3 of the thickness of piece.
8. secondary cell top cover according to claim 1, which is characterized in that the groove is overlooked into " returning " font, described
Groove is located at the lower section at the edge of first insulating part.
9. secondary cell top cover according to claim 1, which is characterized in that first insulating part is accommodated equipped with rotating sheet
Hole, when the air pressure inside of the secondary cell is more than preset value, the rotating sheet is overturn and protrudes into the rotating sheet and accommodated
Hole is contacted with the conductive sheet.
10. a kind of secondary cell, including top cover, battery core and the shell for accommodating battery core, which is characterized in that the top cover is wanted for right
Seek 1~9 any secondary cell top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820618347.6U CN208111497U (en) | 2018-04-26 | 2018-04-26 | Secondary cell top cover and its secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820618347.6U CN208111497U (en) | 2018-04-26 | 2018-04-26 | Secondary cell top cover and its secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208111497U true CN208111497U (en) | 2018-11-16 |
Family
ID=64116096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820618347.6U Active CN208111497U (en) | 2018-04-26 | 2018-04-26 | Secondary cell top cover and its secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208111497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022111199A1 (en) * | 2020-11-27 | 2022-06-02 | 宁德时代新能源科技股份有限公司 | Mounting base, battery, and electrical device |
| WO2024078008A1 (en) * | 2022-10-09 | 2024-04-18 | 华为数字能源技术有限公司 | Battery cover plate, battery, battery pack and energy storage system |
-
2018
- 2018-04-26 CN CN201820618347.6U patent/CN208111497U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022111199A1 (en) * | 2020-11-27 | 2022-06-02 | 宁德时代新能源科技股份有限公司 | Mounting base, battery, and electrical device |
| US11901571B2 (en) | 2020-11-27 | 2024-02-13 | Contemporary Amperex Technology Co., Limited | Mounting base, battery and power consuming device |
| WO2024078008A1 (en) * | 2022-10-09 | 2024-04-18 | 华为数字能源技术有限公司 | Battery cover plate, battery, battery pack and energy storage system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Jiangxi Bestley New Energy Technology Co., Ltd. Assignor: Dongguan Amperex Technology Limited Contract record no.: 2019440020019 Denomination of utility model: Secondary battery top cover and secondary battery Granted publication date: 20181116 License type: Common License Record date: 20190415 |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190930 Address after: 335500 Fengshou Industrial Park, Wannian high tech Industrial Zone, Shangrao City, Jiangxi Province Patentee after: Jiangxi Bestley New Energy Technology Co., Ltd. Address before: 523809 Guan Lian Road, Lian Ping Village, Daling Shan town, Dongguan, Guangdong Patentee before: Dongguan Amperex Technology Limited |