CN208298879U - Secondary cell top cover and its secondary cell - Google Patents
Secondary cell top cover and its secondary cell Download PDFInfo
- Publication number
- CN208298879U CN208298879U CN201820835503.4U CN201820835503U CN208298879U CN 208298879 U CN208298879 U CN 208298879U CN 201820835503 U CN201820835503 U CN 201820835503U CN 208298879 U CN208298879 U CN 208298879U
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- Prior art keywords
- boss
- explosion
- proof valve
- coping plate
- top cover
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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
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model provides a kind of secondary cell top cover, comprising: coping plate, coping plate are equipped with explosionproof hole；Explosion-proof valve, explosion-proof valve is set to explosionproof hole, coping plate is an integral molding structure with explosion-proof valve, coping plate extends boss to the direction far from explosion-proof valve around explosionproof hole, in the vertical direction, the length of coping plate and explosion-proof valve ratio is 2.5~7, and boss length in the horizontal direction and coping plate are 1~10 in the length ratio of vertical direction.It is integrally formed by coping plate and explosion-proof valve, assembly between the two, welding sequence can be removed from, thus process is simple and air-tightness is good, the setting of boss not only can solve the removal problem of extra top cover sheet material simultaneously, while it can also reinforce around explosionproof hole or even the integral strength of coping plate.Meanwhile applicant has also made further design to the size of coping plate, explosion-proof valve and boss, can capture the technical problem for being integrally formed out the relatively thin explosion-proof valve with explosion prevention function on coping plate by creative design.
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 the prior art, when the internal pressure of battery is excessive, battery explosion, needs in the shell by battery in order to prevent
Pressure leak, current explosion-proof method is that explosion-proof valve is arranged on the top cover of battery, when the internal pressure of battery is excessive, is passed through
Explosion-proof valve explosion leaks pressure.Common battery product is all that explosion-proof valve is separately fabricated with coping plate at present, then will be explosion-proof
Valve is welded on coping plate, but will lead to manufacturing cost height, complex procedures in this way.
At present also have researcher propose to coping plate carry out punching press and process with the integrated explosion-proof valve of coping plate, with save
Welding sequence is removed, but the extra top cover sheet waste material for needing that explosion-proof valve will be processed when integrated molding and generating removes, this is just
The difficulty of Sheet Metal Forming Technology is considerably increased, and coping plate thickness is generally thicker (> 2mm), is integrally formed out by punching press relatively thin
Explosion-proof valve with explosion prevention function, difficult, therefore, such integrated cap structure product does not obtain industry at present
Change, is still the technical problem for perplexing industry.
Therefore, it is badly in need of providing the new cap structure of one kind to solve the above problem.
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 greatly simplify process, moreover it is possible to improve the overall mechanical strength of top cover.
A kind of in order to achieve the above object, the utility model provides secondary cell top cover, comprising:
Coping plate, the coping plate are equipped with explosionproof hole；
Explosion-proof valve, the explosion-proof valve are set to the explosionproof hole,
The coping plate is an integral molding structure with the explosion-proof valve, and the coping plate is around the explosionproof hole to far from institute
Boss is extended in the direction for stating explosion-proof valve, and in the vertical direction, the length ratio of the coping plate and the explosion-proof valve is 2.5~7,
The boss length in the horizontal direction is 1~10 in the length ratio of vertical direction with the coping plate.
As one embodiment, the length of the coping plate in the vertical direction is 0.5mm~1.2mm, and the boss exists
Length on vertical direction is less than the length of the coping plate in the vertical direction.The lesser coping plate of length on vertical direction
It is easier to stamp out explosion-proof valve and boss, and the length of boss in the vertical direction is less than the length of coping plate in the vertical direction
Degree, that is to say, that boss size in the horizontal direction is larger, and the size of vertical direction is smaller, thus can further shorten vertically
Time needed for punching press explosion-proof valve on direction reduces the probability that coping plate is ruptured in punching press.
As one embodiment, the explosion-proof valve is set to the bottom of the explosionproof hole, is easier to carry out being integrally formed at this time
Processing, and closer to battery core, more rapid battery explosion can be prevented for excessive react of internal pressure.
The position of boss, as one embodiment, the boss are set to the top of the explosionproof hole, and boss is in addition to reinforcing pushing up
The integral strength of cover plate, when can also prevent injecting electrolytic solution, electrolyte penetrates into the explosion in explosionproof hole and influencing explosion-proof valve.
As another embodiment, the boss is set to the bottom of the explosionproof hole, and the boss is arranged around the explosion-proof valve,
Boss can form the cavity of an encirclement explosion-proof valve around the explosion-proof valve, can converge to the air pressure in battery in cavity, from
And explosion-proof valve is made more timely to make explosion reaction and prevent battery explosion.As another embodiment, the boss has the
One boss and second boss, the first boss are set to the top of the explosionproof hole, and the second boss is set to the explosionproof hole
Bottom, and the second boss around the explosion-proof valve and be arranged, thus first boss and second boss can take into account it is aforementioned
Two kinds of effects.
The shape of boss as one embodiment carries out the boss with the plane of the axis comprising the explosionproof hole
Section, the cross sectional shape of the boss are rectangle.As another embodiment, with the plane pair of the axis comprising the explosionproof hole
The boss carries out section, and the cross sectional shape of the boss has oblique line, and the preferably cross sectional shape of boss is triangle or trapezoidal.
As another embodiment, section is carried out to the boss with the plane of the axis comprising the explosionproof hole, the boss is cut
Face shape has curve.Boss is preferably shaped to cross sectional shape with oblique line, when boss is set to the bottom of explosionproof hole, boss
The cavity formed around explosion-proof valve is because have the gradient that can preferably converge to the air pressure in battery in cavity.
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 and explosion-proof valve of the utility model are integrally formed, and can remove assembly between the two, welding sequence from, thus
Process is simple and air-tightness is good, while when coping plate and explosion-proof valve are integrally formed, can be by extra top cover sheet material explosion-proof
Form boss around hole, the setting of boss not only can solve the removal problem of extra top cover sheet material, while it can be with
Reinforce explosionproof hole around so that coping plate integral strength.Meanwhile design of the applicant by creativeness, to top cover
The size of piece, explosion-proof valve and boss has also made further design, and in the vertical direction, the length ratio of coping plate and explosion-proof valve is
2.5~7, boss length in the horizontal direction and coping plate are 1~10 in the length ratio of vertical direction.In the vertical direction, it pushes up
The length of cover plate and explosion-proof valve ratio be 2.5~7, that is, coping plate thickness be much larger than explosion-proof valve, thus can coping plate with
The intersection of explosion-proof valve forms weak spot, and when cell internal pressure is excessive, explosion-proof valve can effectively carry out explosion and outer pressure release
Power；And boss length in the horizontal direction and coping plate are 1~10 in the length ratio of vertical direction, that is to say, that the water of boss
Leveling ruler cun is larger, thus can shorten coping plate and be integrally formed out the time required when explosion-proof valve in the vertical direction, reduces top cover
The probability that piece is ruptured in integrated molding (when especially punching press).By the size design of coping plate, explosion-proof valve and boss because
And the technical problem that the relatively thin explosion-proof valve with explosion prevention function is integrally formed out on coping plate can be captured.
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 secondary cell top cover of the utility model.
Fig. 3 is the bottom view of one embodiment of coping plate.
Fig. 4 is the top view of one embodiment of coping plate.
Fig. 5 is cross-sectional view of the Fig. 4 along the direction A-A.
Fig. 6 is another variation diagram of boss in Fig. 5.
Fig. 7 is the another variation diagram of boss in Fig. 5.
Fig. 8 is the enlarged drawing of encircled portion in Fig. 6.
Fig. 9 is another variation diagram of projection shape in Fig. 8.
Figure 10 is the another variation diagram of projection shape in Fig. 8.
Figure 11 is another variation diagram of projection shape in Fig. 8.
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.1~4, 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 132 and explosion-proof valve 137 on cover plate 13.Coping plate
13 are equipped with rotating sheet fixation hole 134, the first mounting hole 131, the second mounting hole 135 and explosionproof hole 133, first electrode unit 11
Insulated enclosure is installed in the first mounting hole 131, and 12 insulated enclosure of second electrode unit is installed in the second mounting hole 135, is prevented
Quick-fried valve 137 is set to explosionproof hole 133, and the top of explosion-proof valve 137 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 131, sealing ring 16 is set on the first pole 113 and is contained in the first mounting hole 131, 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, the conductive sheet that second electrode unit 12 includes the second pole 122, is electrically connected with the second pole 122
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
Connectable the two is an integral structure and another is split type structure.For accurately, when conductive sheet 121 is using split type
When structure is separate structure with the second pole 122, the second pole 122 and the second pole boss 123 can be an integral 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 boss 123
For split type structure.Second pole 121 is arranged in the second mounting hole 135, and sealing ring 16 is set on the second pole 122 and receives
It is dissolved in the second mounting hole 135, so that the second pole 122 be made to carry out insulation assembly with coping plate 13.Second pole boss 123 with
The second insulating part 17 is equipped between coping plate 13, the second pole boss 123 and the negative electrode tab of battery core 2 are electrically connected.Conductive sheet
The first insulating part 15 is equipped between 121 and coping plate 13, conductive sheet 121 is located at the top of rotating sheet 14, rotating sheet 14 and top cover
Piece 13 is electrically connected and is set to rotating sheet fixation hole 131, and rotating sheet 14 has interconnecting piece 141, and it is solid that interconnecting piece 141 connects rotating sheet
Determine hole 131.First insulating part 15 is equipped with rotating sheet receiving hole 15c, when the air pressure inside of secondary cell is more than preset value, rotating sheet
14 are overturn and protrude into rotating sheet receiving hole 15c and contacted with conductive sheet 121, that is to say, that rotating sheet 14 and the second pole 122
Electrical connection, because the first pole 113 is electrically connected by resistance 112 with coping plate 13, it is possible in first electrode unit 11, top
Extrinsic current is formed between cover plate 13 and second electrode unit 12, stops overcharging, flow heat dissipation is slowly crossed by external resistance by two
Energy inside primary cell releases, thus will not overcharge, is on fire, explosion etc. danger, to improve secondary cell
Security performance.
As shown in figure 3, coping plate 13 is equipped with boss 136, further as shown in Fig. 5~7, coping plate around explosionproof hole 133
13 are an integral molding structure with explosion-proof valve 137, and explosion-proof valve 137 is set to the bottom of explosionproof hole 133, and coping plate 13 surrounds explosionproof hole
133 extend boss 136 to the direction far from explosion-proof valve 137, can be integrally formed out by the punching press to coping plate 13 ultra-thin
Plate can form explosion-proof valve 137, and the hole that when certain punching press is formed constitutes explosionproof hole 133, the extra top cover being stamped and formed out
Sheet material can form boss 136 around explosionproof hole 133, that is to say, that boss 136 and coping plate 13 and integrated molding, boss
136 setting not only can solve the removal problem of extra top cover sheet material, while it can also reinforce around explosionproof hole 133
Or even the integral strength of coping plate 13.Needing further exist for explanation is, in order to be integrally formed out explosion-proof valve 137 on coping plate 13
With boss 136, need strictly to control the size between coping plate 13, explosion-proof valve 137 and boss 136, in the vertical direction, coping plate
13 with the length ratio of explosion-proof valve 137 be 2.5~7, the length of the length in the horizontal direction of boss 136 and coping plate 13 in vertical direction
Degree is than being 1~10.Coping plate 13 and the length of explosion-proof valve 137 in the vertical direction are normally understood thickness, need to illustrate
, in the application the size of signified coping plate 13 be not include the size of boss 136, but when criticizing often without boss 136
Corresponding length.The width that the length in the horizontal direction of boss 136 is namely usually said.Further, preferred coping plate
13 length in the vertical direction is 0.5mm~1.2mm, and the length of boss 136 in the vertical direction is less than coping plate 13 perpendicular
The upward length of histogram, the size in the horizontal direction of boss 136 is larger, and the size of vertical direction is smaller, thus can be further
Shorten the time needed for punching press explosion-proof valve 137 on 13 vertical direction of coping plate, reduces what coping plate 13 was ruptured in punching press
Probability.
Because explosion-proof valve 137 is usually that the direction in the horizontally arranged of coping plate 13, far from explosion-proof valve 137 can be
In the vertical direction up or down, thus coping plate 13 extend to the direction far from explosion-proof valve 137 around explosionproof hole 133
The position of boss 136 can be there are many mode, as shown in figure 5, boss 136 is set to the bottom of explosionproof hole 133, and boss 135 encloses
It is arranged around explosion-proof valve 137, boss 135 can form the cavity of an encirclement explosion-proof valve 137 around explosion-proof valve 137, can be by battery
Interior air pressure converges in cavity, so that explosion-proof valve 137 be made more timely to make explosion reaction and prevent battery explosion.As another
A kind of embodiment, as shown in fig. 6, boss 136 is set to the top of explosionproof hole 133, entirety of the boss 136 in addition to reinforcing coping plate 13
Intensity, when can also prevent injecting electrolytic solution, electrolyte penetrates into the explosion in explosionproof hole 133 and influencing explosion-proof valve 137.As
Another embodiment, as shown in fig. 7, there is boss 136 first boss 136a and second boss 136b, first boss 136a to be set to
The top of explosionproof hole 133, second boss 136b is set to the bottom of the explosionproof hole 133, and second boss 136b surrounds explosion-proof valve
137 and be arranged, thus first boss 136a and second boss 136b can take into account two kinds of effects above-mentioned.
The shape of boss 136 can there are many modes, as shown in figure 8, with the plane of the axis comprising explosionproof hole 133 to convex
Platform 136 carries out section, and the cross sectional shape of the boss 136 is rectangle.The stereochemical structure of its boss 136 formed is as shown in Figure 3.
As another embodiment, as shown in Figure 9 and Figure 10, boss 136 is cut with the plane of the axis comprising explosionproof hole 133
Face, the cross sectional shape of boss 136 have an oblique line, preferably the cross sectional shape of boss be triangle (as shown in Figure 10) or it is trapezoidal (such as
Shown in Fig. 9).As another embodiment, as shown in figure 11, boss 136 is carried out with the plane of the axis comprising explosionproof hole 133
Section, the cross sectional shape of boss 136 have a curve, and specially top is that part circular lower part is rectangle and the structure constituted.It is convex
Platform 136 is preferably shaped to cross sectional shape with oblique line, and when boss 136 is set to the bottom of explosionproof hole 133, boss 135 is surrounded
The cavity that explosion-proof valve 137 is formed is because have the gradient that can preferably converge to the air pressure in battery in cavity.Thus, boss
Shape can regular can also be irregular shape, and the length in the horizontal direction of boss 136, that is, the width usually said, refer to
The length that boss 136 projects in the horizontal direction.
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, comprising:
Coping plate, the coping plate are equipped with explosionproof hole；
Explosion-proof valve, the explosion-proof valve are set to the explosionproof hole,
It is characterized in that, the coping plate is an integral molding structure with the explosion-proof valve, the coping plate surrounds the explosionproof hole
Extend boss to the direction far from the explosion-proof valve, in the vertical direction, the length ratio of the coping plate and the explosion-proof valve
It is 2.5~7, the boss length in the horizontal direction is 1~10 in the length ratio of vertical direction with the coping plate.
2. secondary cell top cover according to claim 1, which is characterized in that the length of the coping plate in the vertical direction
For 0.5mm~1.2mm, the length of the boss in the vertical direction is less than the length of the coping plate in the vertical direction.
3. secondary cell top cover according to claim 1, which is characterized in that the explosion-proof valve is set to the bottom of the explosionproof hole
Portion, the boss are set to the top of the explosionproof hole.
4. secondary cell top cover according to claim 1, which is characterized in that the explosion-proof valve is set to the bottom of the explosionproof hole
Portion, the boss is set to the bottom of the explosionproof hole, and the boss is arranged around the explosion-proof valve.
5. secondary cell top cover according to claim 1, which is characterized in that the explosion-proof valve is set to the bottom of the explosionproof hole
Portion, the boss have first boss and second boss, and the first boss is set to the top of the explosionproof hole, and described second is convex
Platform is set to the bottom of the explosionproof hole, and the second boss is arranged around the explosion-proof valve.
6. secondary cell top cover according to claim 1, which is characterized in that with the plane of the axis comprising the explosionproof hole
Section is carried out to the boss, the cross sectional shape of the boss is rectangle.
7. secondary cell top cover according to claim 1, which is characterized in that with the plane of the axis comprising the explosionproof hole
Section is carried out to the boss, the cross sectional shape of the boss has oblique line.
8. secondary cell top cover according to claim 7, which is characterized in that the cross sectional shape of the boss be triangle or
It is trapezoidal.
9. secondary cell top cover according to claim 1, which is characterized in that with the plane of the axis comprising the explosionproof hole
Section is carried out to the boss, the cross sectional shape of the boss has curve.
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 |
|---|---|---|---|
| CN201820835503.4U CN208298879U (en) | 2018-05-31 | 2018-05-31 | Secondary cell top cover and its secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820835503.4U CN208298879U (en) | 2018-05-31 | 2018-05-31 | Secondary cell top cover and its secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208298879U true CN208298879U (en) | 2018-12-28 |
Family
ID=64722357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820835503.4U Active CN208298879U (en) | 2018-05-31 | 2018-05-31 | Secondary cell top cover and its secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208298879U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461665A (en) * | 2018-05-31 | 2018-08-28 | 东莞百思利新能源科技有限公司 | Secondary cell head cover and its secondary cell |
| CN114985594A (en) * | 2022-08-04 | 2022-09-02 | 宁波震裕汽车部件有限公司 | Lithium battery top cover plate and explosion-proof valve mounting hole forming process thereof |
-
2018
- 2018-05-31 CN CN201820835503.4U patent/CN208298879U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108461665A (en) * | 2018-05-31 | 2018-08-28 | 东莞百思利新能源科技有限公司 | Secondary cell head cover and its secondary cell |
| CN114985594A (en) * | 2022-08-04 | 2022-09-02 | 宁波震裕汽车部件有限公司 | Lithium battery top cover plate and explosion-proof valve mounting hole forming process thereof |
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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 |
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: 20181228 License type: Common License Record date: 20190415 |
|
| EE01 | Entry into force of recordation of patent licensing contract | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191014 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 |
|
| TR01 | Transfer of patent right |