CN207925528U - Lithium ion battery head cover - Google Patents
Lithium ion battery head cover Download PDFInfo
- Publication number
- CN207925528U CN207925528U CN201820252715.XU CN201820252715U CN207925528U CN 207925528 U CN207925528 U CN 207925528U CN 201820252715 U CN201820252715 U CN 201820252715U CN 207925528 U CN207925528 U CN 207925528U
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- CN
- China
- Prior art keywords
- lithium ion
- injection hole
- head cover
- battery
- ion battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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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- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a kind of lithium ion battery head covers, including coping plate, the sealing structure that the coping plate is equipped with liquid injection hole and seals liquid injection hole both ends and successively increased from the bottom end of liquid injection hole to top fusing point, the sealing structure make inside battery be connected to outside by fusing.In the utility model, battery overcharge or internal thermal runaway etc. in special circumstances, battery temperature increases, the paraffin melted by heat first of liquid injection hole lower layer, vacate space, reduce inside battery air pressure and reaches the polycaprolactone fusing point on upper layer if battery temperature persistently increases, make its melted by heat, inside battery space and exterior space are connected, gas is discharged, avoids the risk of battery explosion.
Description
Technical field
The utility model is related to lithium-ion battery module technical fields, and in particular to a kind of lithium ion battery head cover.
Background technology
Lithium ion battery in actual use, under overcharge or outside, internal particular surroundings, causes lithium ion
Battery thermal runaway is typically accompanied by air pressure inside increase so that there are danger on fire from explosion for battery.
It is above to protect lithium ion battery to encounter using burst disk and short-circuit rotating sheet etc. on battery cap in the prior art
Safety when problem, but need many holes are opened up on lithium ion battery head cover, cause battery cap leakproofness reduce and
Mechanical Structure Strength declines, and short-circuit rotating sheet is used only once, and is unable to Reusability so that battery life reduces how
Overcome problem above, is our technical problems in the urgent need to address.
Invention content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model carries
For a kind of lithium ion battery head cover, it is therefore an objective in battery over charge or internal thermal runaway, reduce inside battery air pressure step by step.
To achieve the goals above, the technical solution that the utility model is taken is：
A kind of lithium ion battery head cover, including coping plate, the coping plate be equipped with liquid injection hole and sealing liquid injection hole both ends and
The sealing structure successively increased from the bottom end of liquid injection hole to top fusing point, the sealing structure by fusing make inside battery with it is outer
Portion is connected to.
Liquid injection hole includes upper layer and lower layer structure, and the space of understructure is more than the space of superstructure.
The section of the liquid injection hole is inverted T-type structure.
The sealing structure includes the polycaprolactone or poly- of the paraffin layer structure and sealing superstructure that seal understructure
Ethylene glycol layer structure.
Negative terminal passes through coping plate and the upper insulation plate on coping plate top and cathode riveting block riveting, positive terminal to pass through head cover
Positive electrode resistance block on piece and coping plate and anode riveting block riveting.
The negative terminal side is equipped with is opened and closed positive and negative terminals by shrinkage disengaging head cover and expanded by heating contact head cover
The short-circuit guard assembly of heat of circuit.
The short-circuit guard assembly of heat includes support plate and the short circuit metallic column in support plate, support plate and negative terminal
Side connection.
The liquid injection hole is set to the middle part of coping plate.
The beneficial effects of the utility model：In the utility model, battery is special in overcharge or internal thermal runaway etc.
In the case of, battery temperature increases, the paraffin melted by heat first of liquid injection hole lower layer, vacates space, reduces inside battery air pressure, such as
Fruit battery temperature persistently increases, and reaches the polycaprolactone fusing point on upper layer, makes its melted by heat, and inside battery space and outside is empty
Between be connected, be discharged gas, avoid the risk of battery explosion.In actual use, first, avoiding overcharging to the further of battery
Damage；Two are that of avoiding the risk of battery explosion, protect battery core, increase the service life of battery；Third, liquid injection hole and anti-
Blast hole is integrated into a hole, avoids and opens up overturning film perforation and explosion-proof valve opening, improves top seal, increase power battery
Security performance and mechanical structure performance.
Description of the drawings
The content of every width attached drawing expression in present specification and the label in figure are briefly described below：
Fig. 1 is the overall structure diagram of the utility model cap assembly；
Fig. 2 is the explosive view of Fig. 1；
Fig. 3 is the upward view of Fig. 1；
Fig. 4 is the front view of Fig. 1；
Fig. 5 is the negative terminal structural schematic diagram of the utility model；
Fig. 6 is the structural schematic diagram at the utility model liquid injection hole.
In figure label for：
1, negative terminal, 2, head cover, 3, liquid injection hole, 5, positive terminal, 6, sealing ring, 7, lower insulation plate, 8, support plate, 9, short circuit
Metal column, 10, upper insulation plate, 11, cathode rivet block, 12, resistance bolck, 13, anode riveting block.
Specific implementation mode
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help those skilled in the art to the design of the utility model, technical solution have it is more complete, accurate and
Deep understanding, and contribute to its implementation.
As shown in fig. 6, a kind of lithium ion battery head cover, including coping plate 2, coping plate 2 are equipped with liquid injection hole 3 and sealing fluid injection
Sealing structure hole 3 both ends and successively increased from the bottom end of liquid injection hole 3 to top fusing point, sealing structure are made by fusing in battery
Portion is connected to outside.Liquid injection hole is preferably disposed on the centre of coping plate, for injecting electrolyte.
Liquid injection hole includes upper layer and lower layer structure, and the space of understructure is more than the space of superstructure.The section of liquid injection hole
Preferably inverted T-type structure.Preferably, sealing structure includes sealing the paraffin layer structure and sealing superstructure of understructure
Polycaprolactone or polyethylene glycol layer structure.Specifically, after liquid injection hole 3 has injected electrolyte, upper layer and lower layer space is used respectively
Different material sealings, lower layer's sealing material fusing point is 45-60 DEG C, such as paraffin, and upper layer sealing material fusing point is 60-70 DEG C,
Such as polycaprolactone or polyethylene glycol etc., utilize levels melting point difference so that liquid injection hole can under the states such as thermal runaway by
Step melts by several times.After preliminary lower layer melted paraffin wax, reduce inside battery air pressure, if battery air-pressure reduces, temperature declines, battery
Normalization, then be not achieved upper layer fusing point, and battery can be used normally.If after lower layer's melted paraffin wax, battery air-pressure and temperature are also
It cannot effectively reduce, constant temperature rises, and reaches the fusing points such as upper layer polycaprolactone, makes its fusing, inside battery and outside are connected
It is logical, exhaust gas is discharged, avoids battery explosion dangerous.
As shown in Fig. 1 to 5, a kind of lithium ion battery cap assembly, by positive terminal 5, negative terminal 1 and above-mentioned coping plate 2
Deng composition, the both ends of specially coping plate 2 are respectively equipped with positive and negative electrode post holes, and positive and negative pole upper end is covered there are one sealing ring 6,
Negative terminal 1 passes through the upper insulation plate 10 on 2 top of coping plate 2 and coping plate to be riveted with cathode riveting block 11, and positive terminal 5 passes through head cover
Positive electrode resistance block 12 on piece 2 and coping plate 2 is riveted with anode riveting block 13.Upper insulation plate is preferably plastic plate on cathode, is born
Extremely upper plastic cement main function is that negative terminal and coping plate are electrically insulated.It is that cathode rivets aluminium block, anode riveting block that cathode, which rivets block,
Aluminium block is riveted for anode.Positive electrode resistance block act as positive terminal and head cover being electrically connected so that head cover and housing of power cell are all
It is positively charged.Positive terminal and negative terminal head cover have corresponding lower insulation plate 7, and lower insulation plate is plastic parts under pole, is used for
Coping plate and battery core are insulated.
The lithium ion battery cap assembly further includes being set to 1 side of negative terminal to be detached from coping plate 2 by shrinkage and be heated swollen
Expanded joint touches the short-circuit guard assembly of heat that positive and negative terminals circuit is opened and closed in coping plate 2.The short-circuit guard assembly of setting heat, in battery mistake
When amount charging or internal thermal runaway, makes battery external short circuit, avoid overcharging the further damage to battery.
Hot short circuit guard assembly includes support plate 8 and the short circuit metallic column 9 in support plate 8, support plate 8 and negative terminal
1 side connection.Support plate 8 is to be fixedly connected with negative terminal 1, and short circuit metallic column 9 is the higher metallic conduction of coefficient of thermal expansion
Material, such as the linear expansion coefficient of magnesium alloy MB2 are larger, satisfy the use demand.Under lithium ion battery normal operating condition, short circuit gold
Belong to column 9 and coping plate 2 does not contact, positive and negative terminals circuit disconnects.
In actual use, battery overcharge or internal thermal runaway etc. in special circumstances, battery temperature increases, note
The paraffin of fluid apertures lower layer melted by heat first vacates space, reduces inside battery air pressure and is reached if battery temperature persistently increases
To the polycaprolactone fusing point on upper layer, make its melted by heat, inside battery space and exterior space are connected, gas is discharged, keeps away
The risk of battery explosion is exempted from.Short circuit metallic column reaches set temperature value expanded by heating and coping plate contact, by positive and negative terminals electricity
Road is connected to so that battery external short circuit avoids overcharging the further damage to battery, avoids the risk of battery explosion, protect simultaneously
Battery core is protected.After temperature decline, short circuit metallic column shrinkage is detached from coping plate so that positive and negative terminals disconnecting circuit connects, and increases
The service life of battery.When specific installation, support plate is preferably fixedly connected on the bottom end of negative terminal side, and short circuit metallic column is solid
Due in support plate.
The utility model is exemplarily described above in association with attached drawing.Obviously, the utility model implements not
It is limited by aforesaid way.As long as using the various unsubstantialities of the methodology and technical solution progress of the utility model
Improvement；Or it is not improved, above-mentioned design and technical solution by the utility model directly apply to other occasions, at this
Within the protection domain of utility model.
Claims (8)
1. a kind of lithium ion battery head cover, including coping plate, it is characterised in that：The coping plate is equipped with liquid injection hole and sealing fluid injection
Hole both ends and the sealing structure successively increased from the bottom end of liquid injection hole to top fusing point, the sealing structure make battery by fusing
It is internal to be connected to outside.
2. lithium ion battery head cover according to claim 1, it is characterised in that：The liquid injection hole includes upper layer and lower layer knot
Structure, the space of understructure are more than the space of superstructure.
3. lithium ion battery head cover according to claim 1 or 2, it is characterised in that：The section of the liquid injection hole is inverted T shaped
Structure.
4. lithium ion battery head cover according to claim 2, it is characterised in that：The sealing structure includes sealing lower layer knot
The polycaprolactone or polyethylene glycol layer structure of the paraffin layer structure and sealing superstructure of structure.
5. lithium ion battery head cover according to claim 1, it is characterised in that：Negative terminal passes through on coping plate and coping plate
The upper insulation plate in portion passes through the positive electrode resistance block on coping plate and coping plate to be riveted with anode with cathode riveting block riveting, positive terminal
Block rivets.
6. lithium ion battery head cover according to claim 5, it is characterised in that：The negative terminal side, which is equipped with, passes through shrinkage
It is detached from coping plate and the short-circuit guard assembly of heat of positive and negative terminals circuit is opened and closed in expanded by heating contact coping plate.
7. lithium ion battery head cover according to claim 6, it is characterised in that：The short-circuit guard assembly of heat includes support
The side of plate and the short circuit metallic column in support plate, support plate and negative terminal connects.
8. lithium ion battery head cover according to claim 1, it is characterised in that：The liquid injection hole is set in coping plate
Portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820252715.XU CN207925528U (en) | 2018-02-12 | 2018-02-12 | Lithium ion battery head cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820252715.XU CN207925528U (en) | 2018-02-12 | 2018-02-12 | Lithium ion battery head cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207925528U true CN207925528U (en) | 2018-09-28 |
Family
ID=63601498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820252715.XU Active CN207925528U (en) | 2018-02-12 | 2018-02-12 | Lithium ion battery head cover |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207925528U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916584A (en) * | 2020-07-02 | 2020-11-10 | 欣旺达电动汽车电池有限公司 | Lithium ion battery top cover assembly and lithium ion battery |
| CN113948814A (en) * | 2021-09-11 | 2022-01-18 | 安徽瑞露科技有限公司 | Battery top cap subassembly |
-
2018
- 2018-02-12 CN CN201820252715.XU patent/CN207925528U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111916584A (en) * | 2020-07-02 | 2020-11-10 | 欣旺达电动汽车电池有限公司 | Lithium ion battery top cover assembly and lithium ion battery |
| CN111916584B (en) * | 2020-07-02 | 2022-06-10 | 欣旺达电动汽车电池有限公司 | Lithium ion battery top cover assembly and lithium ion battery |
| CN113948814A (en) * | 2021-09-11 | 2022-01-18 | 安徽瑞露科技有限公司 | Battery top cap subassembly |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |