CN204706599U - Barrier film lithium battery - Google Patents
Barrier film lithium battery Download PDFInfo
- Publication number
- CN204706599U CN204706599U CN201520494357.XU CN201520494357U CN204706599U CN 204706599 U CN204706599 U CN 204706599U CN 201520494357 U CN201520494357 U CN 201520494357U CN 204706599 U CN204706599 U CN 204706599U
- Authority
- CN
- China
- Prior art keywords
- barrier film
- lithium battery
- throttling ball
- housing
- choke
- 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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Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 34
- 230000004888 barrier function Effects 0.000 title claims abstract description 33
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000010943 off-gassing Methods 0.000 claims abstract description 16
- 239000011241 protective layer Substances 0.000 claims abstract description 8
- 238000009835 boiling Methods 0.000 claims description 4
- 230000005389 magnetism Effects 0.000 claims description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 238000004880 explosion Methods 0.000 description 5
- 239000003792 electrolyte Substances 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 230000008016 vaporization Effects 0.000 description 4
- 241000555268 Dendroides Species 0.000 description 3
- 150000002641 lithium Chemical group 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000036262 stenosis Effects 0.000 description 2
- 208000037804 stenosis Diseases 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 208000032953 Device battery issue Diseases 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to a kind of barrier film lithium battery, and this barrier film lithium battery includes housing, positive electrode, negative material and barrier film; Between described negative material and barrier film, also protective layer is installed; Described protective layer includes can along the choke block of housing translation gliding and the fixed network between two pieces of described choke blocks; Be separately installed with sliding block at the lower edges of described choke block, described sliding block be opened in housing end face, the chute of bottom surface matches; Each node of described fixed network is fixed with the throttling ball made by thermal expansion material; On two pieces of described choke blocks each described throttling ball just right position all offer throttle orifice, the diameter of described throttle orifice is less than the diameter of throttling ball; Offer outgassing nonreturn valve on the housing, described outgassing nonreturn valve and described sliding stop location just right; This barrier film lithium battery can available protecting barrier film, prevents battery internal short-circuit; There is good over-pressure safety device simultaneously.
Description
Technical field
The present invention relates to a kind of lithium battery, especially, is a kind of barrier film lithium battery.
Background technology
Compared to traditional lead acid accumulator, lithium battery has obvious advantage, and its energy Ratios is higher, longer service life, rated voltage are higher, self-discharge rate is lower, and quality is lighter simultaneously, more energy-conserving and environment-protective, plurality of advantages makes lithium battery be widely used in each corner of life; But still there is potential safety hazard in current lithium battery, lithium battery by use in recent years in, often have about lithium battery blast report; One of common explosion cause: when over-charge of lithium battery, the dendroid lithium atom that cell negative plate is piled up will pierce through barrier film and make battery plus-negative plate internal short-circuit, and then cause battery explosion; In addition, battery itself is provided with safety control, but these devices cannot be made a response to high pressure fast, cannot quick-opening safe air valve, causes inner pressure of battery sharply rise and set off an explosion.
Summary of the invention
For the problems referred to above, the invention provides a kind of barrier film lithium battery, this barrier film lithium battery can available protecting barrier film, prevents battery internal short-circuit; There is good over-pressure safety device simultaneously.
For solving the problem, the technical solution adopted in the present invention is: this barrier film lithium battery includes housing, positive electrode, negative material and barrier film; In described positive electrode, insert positive terminal, in described negative material, insert negative terminal; Between described negative material and barrier film, also protective layer is installed; Described protective layer include two pieces parallel, can along housing bottom surface, choke block that end face alternating translational slides and the fixed network between two pieces of described choke blocks; Be separately installed with sliding block at the lower edges of described choke block, described sliding block be opened in housing end face, the chute of bottom surface matches; Each node of described fixed network is fixed with the throttling ball made by thermal expansion material; On two pieces of described choke blocks each described throttling ball just right position all offer throttle orifice, the diameter of described throttle orifice is less than the diameter of throttling ball; Under nature, throttle orifice press close to a hole end surface of throttling ball and described throttling ball tangent, together with the same bottom surface of housing fits tightly with the described sliding block of often pair on end face; Offer outgassing nonreturn valve on the housing, described outgassing nonreturn valve and described sliding stop location just right; Described choke block also offers fluid-tight vent valve.
The invention has the beneficial effects as follows: under normal condition, together with the same bottom surface of housing fits tightly with the described sliding block on end face, inside battery is in sealing state; Simultaneously throttle orifice press close to a hole end surface of throttling ball and described throttling ball tangent, the electrolyte therefore in lithium battery can circulate between two pieces of choke blocks; Lithium ion, in charging process, first through the filtration of barrier film, then flows to from the choke block pressing close to positive electrode, flow to negative material after skimming over the sphere of throttling ball from another block choke block; Compared to traditional lithium battery; one section of circular arc route around spheric motion is there is in lithium ion of the present invention on movement locus; when over-charging of battery; the dendroid lithium atom grown from power cathode will be seated against sphere growth; and directly can not stab barrier film; therefore there is obvious defencive function, make battery more stable, safe, durable.
When battery charging occurs abnormal, inside battery heats up too high; Described throttling ball expanded by heating, volume becomes large throttling ball and presses close to each described throttle orifice gradually, now flows to the lithium ion tunnel stenosis of negative pole from positive pole narrow, and battery internal resistance becomes large, effectively stops battery mid-winter; When temperature is too high, throttling ball expands and seals throttle orifice completely, blocks lithium ion tunnel, realizes the open circuit of inside battery, thus protection battery; When there is the situations such as external short circuit as battery, even if internal break battery still can be persistently overheating, along with battery heats up, two pieces of choke blocks also push away separately by throttling ball prolonged expansion to both sides, now inside battery is communicated with described outgassing nonreturn valve, the electrolyte of vaporizing that is heated can be discharged from fluid-tight vent valve and outgassing nonreturn valve, and then prevent battery explosion; After failture evacuation, throttling ball restores to the original state, and battery can continue to use.
Delicate structure of the present invention, not easily causes the damage of barrier film, has longer useful life.
As preferably, often pair of described sliding block fitted tightly all is provided with the attracting permanent magnetism sheet of heteropole; So that strengthen the suction-combining force between sliding block, increase the seal of battery.
As preferably, described throttling ball is elastic hollow ball; So that larger deformation quantity can be produced after throttling ball is heated, and then strengthen throttling ball to current limliting, the sealing process of throttle orifice.
As preferred further, in described throttling ball, be filled with evaporated liquor, the boiling temperature of described evaporated liquor is identical with the safe upper temperature of lithium battery; When inside battery reaches temperature upper limit, evaporated liquor vaporization makes throttling ball rapid expansion thus conducting outgassing nonreturn valve, carries out quick heat radiating.
Accompanying drawing explanation
Fig. 1 is the cross section structure schematic diagram of this barrier film lithium battery embodiment.
Fig. 2 is the cross section structure schematic diagram when choke block is open embodiment illustrated in fig. 1.
Embodiment
Embodiment
In the embodiment shown in Fig. 1, Fig. 2, this barrier film lithium battery includes housing 1, positive electrode, negative material and barrier film 2; In described positive electrode, insert positive terminal 3, in described negative material, insert negative terminal 4; Between described negative material and barrier film 2, also protective layer is installed; Described protective layer include two pieces parallel, can along housing 1 bottom surface, choke block 6 that end face alternating translational slides and the fixed network 7 between two pieces of described choke blocks 6; Be separately installed with sliding block 62 at the lower edges of described choke block 6, described sliding block 62 be opened in housing 1 end face, the chute of bottom surface matches; Each node of described fixed network 7 is fixed with the throttling ball 71 made by thermal expansion material, described throttling ball 71 is elastic hollow ball, in described throttling ball 71, be filled with evaporated liquor, the boiling temperature of described evaporated liquor is identical with the safe upper temperature of lithium battery; On two pieces of described choke blocks each described throttling ball 71 just right position all offer throttle orifice 61, the diameter of described throttle orifice 61 is less than the diameter of throttling ball 71; Under nature, throttle orifice 61 press close to a hole end surface of throttling ball 71 and described throttling ball 71 tangent, together with the same bottom surface of housing 1 fits tightly with the described sliding block 62 of often pair on end face; Two the sliding blocks 62 to fit tightly for every a pair are separately installed with the attracting permanent magnetism sheet 621 of heteropole; Described housing 1 offers outgassing nonreturn valve 11, and described outgassing nonreturn valve 11 is just right with described sliding block 62 position; Described outgassing nonreturn valve 11 only allows gas to discharge from inside battery; Described choke block 6 offers fluid-tight vent valve 63, and described fluid-tight vent valve 63 only allows gas to be expelled to outgassing nonreturn valve 11 from inside battery.
Under normal condition, together with the same bottom surface of housing 1 fits tightly with the described sliding block 62 on end face, under the effect of magnetic attraction, often pair of described sliding block 62 secure seal, now inside battery is in sealing state; Simultaneously throttle orifice 61 press close to a hole end surface of throttling ball 71 and described throttling ball 71 tangent, namely space is left between throttle orifice 61 and throttling ball 71, therefore the electrolyte in lithium battery can circulate between two pieces of choke blocks 6, because space is less, shows not detailed in Fig. 1; Lithium ion, in charging process, first through the filtration of barrier film 2, then flows to from the choke block 6 pressing close to positive electrode, flow to negative material after skimming over the sphere of throttling ball 71 from another block choke block 6; Compared to traditional lithium battery; one section of circular arc route around spheric motion is there is in lithium ion of the present invention on movement locus; when over-charging of battery; the dendroid lithium atom grown from power cathode will be seated against sphere growth; and can not perpendicular insertion to barrier film 2; therefore the present invention has obvious defencive function, makes battery more stable, safe, durable.
When battery charging occurs abnormal, internal temperature of battery raises; Described throttling ball 71 expanded by heating, volume becomes large throttling ball 71 and presses close to each described throttle orifice 61 gradually, now flows to the lithium ion tunnel stenosis of negative pole from positive pole narrow, and battery internal resistance becomes large, effectively reduces the electric current of inside battery, stops battery mid-winter; When temperature is too high, throttling ball 71 expands and seals throttle orifice 61 completely, blocks lithium ion tunnel, realizes the open circuit of inside battery, thus protection battery; When there is the situations such as external short circuit as battery, even if internal break battery still can be persistently overheating, along with battery heats up, two pieces of choke blocks 6 also push away separately by throttling ball 71 prolonged expansion to both sides, described sliding block 62 is separated from each other, now inside battery is communicated with described outgassing nonreturn valve 11 by described fluid-tight vent valve 63 with the external world, and the electrolyte of vaporization of being heated can be discharged from fluid-tight vent valve 63 and outgassing nonreturn valve 11, and then prevents battery explosion; After failture evacuation, throttling ball 71 can restore to the original state, and choke block 6 is battery recovery sealing state after the reset, and now battery can continue to use.
In the present embodiment, in hollow throttling ball 71, be filled with evaporated liquor, the boiling temperature of described evaporated liquor is identical with the safe upper temperature of lithium battery; When inside battery reaches temperature upper limit, the evaporated liquor fast vaporizing in throttling ball 71, makes throttling ball 71 rapid expansion, thus pushes the choke block 6 of both sides fast open, and conducting outgassing nonreturn valve 11, realizes quick heat radiating.
Delicate structure of the present invention, not easily causes the damage of barrier film 2, has longer useful life; Battery internal short-circuit and external short circuit can be prevented simultaneously, there is good safeguard measure, therefore use safer; The protective device of this battery can recover, and can continue normal use, therefore have higher use value after battery failures is discharged.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a barrier film lithium battery, this barrier film lithium battery includes housing (1), positive electrode, negative material and barrier film (2); In described positive electrode, insert positive terminal (3), in described negative material, insert negative terminal (4); It is characterized in that: between described negative material and barrier film (2), also protective layer is installed; Described protective layer include two pieces parallel, can along housing bottom surface, choke block (6) that end face alternating translational slides and the fixed network (7) that is positioned between two pieces of described choke blocks (6); Be separately installed with sliding block (62) at the lower edges of described choke block (6), described sliding block (62) be opened in housing (1) end face, the chute of bottom surface matches; Each node of described fixed network (7) is fixed with the throttling ball (71) made by thermal expansion material; The upper each described throttling ball (71) of two pieces of described choke blocks (6) just right position all offer throttle orifice (61), the diameter of described throttle orifice (61) is less than the diameter of throttling ball (71); Under nature, throttle orifice (61) press close to a hole end surface of throttling ball (71) and described throttling ball (71) tangent, together with housing (1) same bottom surface fits tightly with the described sliding block (62) of often pair on end face; Described housing (1) offers outgassing nonreturn valve (11), and described outgassing nonreturn valve (11) is just right with described sliding block (62) position; Described choke block (6) also offers fluid-tight vent valve (63).
2. barrier film lithium battery according to claim 1, is characterized in that: on often pair of described sliding block (62) fitted tightly, be all provided with the attracting permanent magnetism sheet (621) of heteropole.
3. barrier film lithium battery according to claim 1 and 2, is characterized in that: described throttling ball (71) is elastic hollow ball.
4. barrier film lithium battery according to claim 3, is characterized in that: in described throttling ball (71), be filled with evaporated liquor, the boiling temperature of described evaporated liquor is identical with the safe upper temperature of lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520494357.XU CN204706599U (en) | 2015-07-07 | 2015-07-07 | Barrier film lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520494357.XU CN204706599U (en) | 2015-07-07 | 2015-07-07 | Barrier film lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204706599U true CN204706599U (en) | 2015-10-14 |
Family
ID=54286194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520494357.XU Active CN204706599U (en) | 2015-07-07 | 2015-07-07 | Barrier film lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204706599U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953073A (en) * | 2015-07-07 | 2015-09-30 | 陈伟强 | Diaphragm lithium battery |
-
2015
- 2015-07-07 CN CN201520494357.XU patent/CN204706599U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953073A (en) * | 2015-07-07 | 2015-09-30 | 陈伟强 | Diaphragm lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xiao Lilong Inventor before: Chen Weiqiang |
|
| COR | Change of bibliographic data | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160829 Address after: Beijing Industrial Park No. 3 two road in Longgang District of Shenzhen City, Guangdong province 518000 Longgang Street Baolong Baolong Community Plant No. 2 Patentee after: SHENZHEN HONCELL ENERGY CO., LTD. Address before: Ouhai Newbridge street 325006 Zhejiang city of Wenzhou province Xining alley No. 29 Patentee before: Chen Weiqiang |