CN203536508U - Built-in protection device type lithium battery - Google Patents
Built-in protection device type lithium battery Download PDFInfo
- Publication number
- CN203536508U CN203536508U CN201320646914.6U CN201320646914U CN203536508U CN 203536508 U CN203536508 U CN 203536508U CN 201320646914 U CN201320646914 U CN 201320646914U CN 203536508 U CN203536508 U CN 203536508U
- Authority
- CN
- China
- Prior art keywords
- current collector
- battery
- negative current
- insulation spacer
- lithium 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.)
- Expired - Lifetime
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 25
- 238000009413 insulation Methods 0.000 claims abstract description 35
- 125000006850 spacer group Chemical group 0.000 claims abstract description 28
- 238000005096 rolling process Methods 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims description 22
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000004880 explosion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001120 nichrome Inorganic materials 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
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
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model relates to a built-in protection device type lithium battery which comprises a battery cover plate, a battery housing and a rolling core located in the battery housing, wherein the rolling core is formed by stacking and winding a negative plate, a diaphragm and a positive plate; a fixing ring, an insulating cover sheet and an insulation spacer are sequentially arranged between the battery cover plate and the rolling core in a clung manner; the insulation spacer compresses the rolling core; the fixing ring is welded on an internal wall of the battery housing; the lithium battery further comprises a first cathode current collector, a second cathode current collector, and a fuse connected between the first cathode current collector and the second cathode current collector; one end of the first cathode current collector is located on the insulation spacer; the other end of the first cathode current collector extends to an opening of the battery housing and is compressed onto the internal wall of the battery housing by the battery cover plate; one end of the second cathode current collector is located on the insulation spacer; and the other end of the second cathode current collector extends to the bottom of the battery housing and is welded with the negative plate. Since the lithium battery is provided with a built-in protection device which is simple in structure, the short-circuit protection capability and anti-vibration capability of the lithium battery are improved.
Description
Technical field
The utility model relates to technical field of lithium batteries, particularly a kind of under short-circuit conditions, can realize by built-in protective device the lithium battery of self-protection.
Background technology
Recent years, along with the frequent generation of security incident, government department continues to increase the supervision to safety in production.In battery manufacture field, especially for the battery that is applied in the relatively large field of potential safety hazard, as be applied in the battery on the production equipments such as combustion gas, colliery, national policy mandatory requirement battery quality must reach corresponding certification of explosion protection standard.
At present, those skilled in the art often adopt external protective device to carry out technological processing for explosion protection feature to battery.For example, at battery, be outside equipped with fuse, fuse is connected between electrode tip and utmost point group, when battery in use, if there is the phenomenon of positive and negative electrode short circuit, the immediate current that flows through fuse increases suddenly, and fuse is fused immediately, thereby effectively stops blast, the generation of the dangerous situation such as leakage, fire.
Again for example, relief valve is set on battery case, the patent No. is that the Chinese patent of ZL20092020173.3 has disclosed a kind of pressure release valve for lithium ion batteries, this patent document is called oneself by regulating the relative axial position of valve gap draw-in groove and valve body draw-in groove can change the deformation quantity of spring, the operating pressure of setting and control spool opening and closing, when inside battery air pressure reaches operating pressure, spool is opened automatically, alleviate air pressure, avoid the housing explosion of lithium ion battery.
But, the equal Shortcomings of technical scheme of above-mentioned several external safeguards.First, in some application circumstances or test occasion, do not allow the external protective device of battery, also do not allow battery to leak, this will limit the range of application of external protective device lithium battery; Secondly, before unassembled external failsafe device, the storage of monomer battery core, the fail safe of using can not be guaranteed; Moreover, easily make exposed protective device impaired in the process of carrying or storage by safeties are external, thereby lose defencive function.
The patent No. is the battery that the Chinese patent of ZL200420073120.6 has disclosed a kind of embedded with safety device formula; in this patent, fuse is vertically arranged between battery cap and utmost point group; safeties are curved to be installed with vertical direction; battery is when standing short circuit, and blown fuse is cut off circuit protection and do not occurred safety problem with battery.
But, the embedded with safety device that above-mentioned patent discloses, when battery stands high-intensity vibrations or mechanical shock, because utmost point group fails to fix in battery, fuse can be subject to the effect of utmost point group and stressed, thereby reduces the reliability that fuse connects.
Utility model content
The purpose of this utility model is to overcome weak point of the prior art; a kind of built-in protective device formula lithium battery simple in structure is provided; improve the protective capability when short circuit abnormal conditions occur of lithium battery, and improve the vibration resistance of lithium battery in high mechanical shock environment.
The purpose of this utility model is achieved through the following technical solutions:
A kind of built-in protective device formula lithium battery, the volume core that comprises battery cover board, battery container and be positioned at battery container inside, described volume core is stacked to reel by negative plate, barrier film and positive plate and forms, described battery cover board is also close to successively and is provided with retainer ring, insulation cover plate and insulation spacer to rolling up between core, described insulation spacer presses volume core, and described retainer ring is welded on battery container inwall;
Described lithium battery also comprises the first negative current collector, the second negative current collector and is connected in the fuse between the first negative current collector, the second negative current collector, described first negative current collector one end is positioned on insulation spacer, the other end extends to battery container opening part and is pressed to battery container inwall by battery cover board, described second negative current collector one end is positioned on insulation spacer, and the other end extends and welds with negative plate to battery container bottom.
The innovative point of such scheme mainly comprises three:
First, inventor is built-in by protective device, avoids the fail safe that the external range of application of bringing is limited, monomer battery core is stored, use to can not be guaranteed and protective device impaired deficiency in the process of carrying or storage;
Secondly, inventor is by setting up retainer ring, insulation cover plate, insulation spacer, and insulation spacer is pressed to volume core, retainer ring is welded on battery container inwall, and the displacement in the vertical direction of restriction volume core, thus improve the vibration resistance of battery;
Moreover; inventor realizes the protection when short circuit abnormal conditions occur to lithium battery by simple structural design (the first negative current collector, the second negative current collector are set and are connected in the fuse between the first negative current collector, the second negative current collector, and one end of the first negative current collector is extended to battery container opening part and pressed to battery container inwall, one end of the second negative current collector is extended and welded with negative plate to battery container by battery cover board).
As improving technical scheme, in order to make the first negative current collector, the second negative current collector be easy to fix, described the first negative current collector is bent into L shape, stand on the upper surface of insulation spacer, described the second negative current collector bending is buckled in insulation spacer edge, and described the first negative current collector, the second negative current collector and fuse are all insulated cover plate and are pressed and fixed on insulation spacer.
In order to improve the fixed effect of retainer ring, further promote the vibration resistance of battery, as further improvement technical scheme, described retainer ring comprises the sheet metal that is provided with through hole in the middle of, and be connected in sheet metal several pins around, described pin is evenly arranged on around sheet metal, and is welded in successively on battery container inwall.
As preferred connected mode, described fuse respectively with the first negative current collector, the second current collector and bottom plate spoting.
As preferred material, described the first negative current collector and the second negative current collector are pure nickel band or stainless steel band.
As preferred material, described fuse is pure nickel wire or nichrome resistance wire.It is respectively to have quality based on bi-material that inventor makes selection like this, and the scope of application is different.While using pure nickel wire, the output voltage of battery and electric current are all unaffected, and by the maximum discharge current of selecting the nickel wire of different-diameter can stand with regulating cell, when surpassing maximum discharge current, nickel wire fusing, cuts off electric current output, and cannot recover; Use the suitable nichrome resistance wire of specification, although the input voltage of battery will be influenced and reduce in normal work, but when standing short circuit, resistance wire generates heat but does not fuse, and now resistance significantly rises, now short circuit battery is equivalent to stand constant-resistance discharge, can not cause safety problem, disconnect after short circuit, resistance wire temperature reduces, resistance returns to conventional levels, and battery can normally be worked again.
As preferred material, described sheet metal and pin are stainless steel.
The utility model has the following advantages and beneficial effect compared to existing technology:
(1) the utility model is by avoiding the external deficiency of bringing of protective device protective device is built-in;
(2) in the utility model, safeties plane layout, above utmost point group, has reduced the stressed of safeties, has strengthened its Mechanical Reliability;
(3) lithium battery of the present utility model not only has the protective capability in battery short circuit situation, also has antivibration effect;
(4) protective device of the present utility model is simple in structure, and cost is low, easily promotes and realizes;
(5) setting up of the utility model insulation cover plate and insulation spacer not only improved fuse and rolls up the fixing of core, also has insulation function;
The special construction design of (6) first negative current collectors and the second negative current collector, for fixedly providing convenience to it;
(7) pin configuration of the utility model retainer ring designs, and has improved the fixed effect of retainer ring, further promotes the vibration resistance of battery.
Accompanying drawing explanation
Fig. 1 is the built-in protective device formula of the utility model lithium battery interior structure explosive view.
Fig. 2 is the utility model retainer ring structural representation.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but the execution mode that the utility model is created is not limited to this.
As shown in Figure 1, a kind of built-in protective device formula lithium battery, comprises battery cover board 1, battery container 2 and the volume core 3 that is positioned at battery container 2 inside, and volume core 3 is stacked to reel by negative plate, barrier film and positive plate and forms.Battery cover board 1 is provided with retainer ring 4, insulation cover plate 5 and insulation spacer 6 to being close to successively between volume core 3, and insulation spacer 6 presses volume core 3, and retainer ring 4 is welded on battery container 2 inwalls.
Lithium battery also comprises the first negative current collector 7, the second negative current collector 8 and is connected in the fuse 9 between the first negative current collector 7, the second negative current collector 8.The first negative current collector 7 is bent into L shape, forms two planes, i.e. horizontal plane 71 and vertical plane 72, and wherein horizontal plane 71 stands on the upper surface of insulation spacer 6, and vertical plane 72 extends to battery container 2 opening parts and is pressed to battery container 2 inwalls by battery cover board 1; The same bending of the second negative current collector 8 forms two planes, be horizontal plane 81 and vertical plane 82, horizontal plane 81 and the common groove forming of vertical plane 82 are buckled in insulation spacer 6 edges, and the vertical plane 82 of the second negative current collector 8 also extends and welds with negative plate to battery container 2 bottoms; The horizontal plane 71 of the first negative current collector, the horizontal plane 81 of the second negative current collector and fuse 9 are all insulated cover plate 5 and are pressed and fixed on insulation spacer 6.
Concrete, fuse 9 is welded as a whole with the first negative current collector 7, the second negative current collector 8 respectively; The first negative current collector 7 and the second negative current collector 8 are pure nickel band or stainless steel band; Fuse 9 is pure nickel wire or nichrome resistance wire.
As shown in Figure 2, retainer ring 4 comprises a sheet metal 41 and is connected in sheet metal 41 eight pins 42 around, and the centre of sheet metal is provided with through hole 43, and pin 42 is evenly arranged on around sheet metal 41, and is welded in successively on battery container 2 inwalls.Wherein, sheet metal 41 and pin 42 are stainless steel.
In the specific implementation, number of assembling steps is as follows for the built-in protective device formula of the utility model lithium battery:
Step 1, electric core winding.
First, positive plate is inserted to volume pin, the circle of reeling;
Secondly, the negative plate that barrier film is wrapped inserts the positive pole of the circle of having reeled and rolls up in pin and lasting coiling, until complete the making of volume core;
Finally, volume core is filled in to battery container, but wouldn't put to battery container bottom, one end of negative plate is stayed outside battery container.
First, an end of the first negative current collector of band shape is connected with one end spot welding of fuse;
Secondly, an end of banded the second negative current collector is connected with the other end spot welding of fuse;
Then, the first negative current collector and the second negative current collector are bent into shape shown in Fig. 1, fuse is made to spring-like, the other end that the second negative current collector is not welded and the negative plate end welding of staying outside battery container, at volume core upper ends insulation spacer, fuse is laid on insulation spacer again;
Finally, in fuse plane, place again an insulation cover plate, retainer ring is packed into and compress, behind fixed position, then the pin point of retainer ring is welded on the inwall of battery container.
Step 3, is welded in plus plate current-collecting body point on positive terminal, gland, has welded battery core assembling.
Step 4, the battery core that assembling is completed is carried out after short-circuit test, injects electrolyte, and indentation sealing is followed closely and is cleaned.
The above embodiment has only expressed execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, not departing under prerequisite of the present utility model, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (4)
1. a built-in protective device formula lithium battery, the volume core that comprises battery cover board, battery container and be positioned at battery container inside, described volume core is stacked to reel by negative plate, barrier film and positive plate and forms, it is characterized in that: described battery cover board is also close to successively and is provided with retainer ring, insulation cover plate and insulation spacer to rolling up between core, described insulation spacer presses volume core, and described retainer ring is welded on battery container inwall;
Described lithium battery also comprises the first negative current collector, the second negative current collector and is connected in the fuse between the first negative current collector, the second negative current collector, described first negative current collector one end is positioned on insulation spacer, the other end extends to battery container opening part and is pressed to battery container inwall by battery cover board, described second negative current collector one end is positioned on insulation spacer, and the other end extends and welds with negative plate to battery container bottom.
2. built-in protective device formula lithium battery according to claim 1; it is characterized in that: described the first negative current collector is bent into L shape; stand on the upper surface of insulation spacer; described the second negative current collector bending is buckled in insulation spacer edge, and described the first negative current collector, the second negative current collector and fuse are all insulated cover plate and are pressed and fixed on insulation spacer.
3. built-in protective device formula lithium battery according to claim 1 and 2; it is characterized in that: described retainer ring comprises the sheet metal that is provided with through hole in the middle of; and be connected in sheet metal several pins around; described pin is evenly arranged on around sheet metal, and is welded in successively on battery container inwall.
4. built-in protective device formula lithium battery according to claim 3, is characterized in that: described fuse respectively with the first negative current collector, the second current collector and bottom plate spoting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320646914.6U CN203536508U (en) | 2013-10-18 | 2013-10-18 | Built-in protection device type lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320646914.6U CN203536508U (en) | 2013-10-18 | 2013-10-18 | Built-in protection device type lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203536508U true CN203536508U (en) | 2014-04-09 |
Family
ID=50422685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320646914.6U Expired - Lifetime CN203536508U (en) | 2013-10-18 | 2013-10-18 | Built-in protection device type lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203536508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633282A (en) * | 2013-10-18 | 2014-03-12 | 惠州亿纬锂能股份有限公司 | Internally-arranged protection device type lithium battery |
| CN110299249A (en) * | 2019-06-11 | 2019-10-01 | 成都凹克新能源科技有限公司 | A kind of electrochemical energy storing device |
| CN111313077A (en) * | 2020-04-09 | 2020-06-19 | 陈永晓 | Manufacturing method of button lithium battery |
-
2013
- 2013-10-18 CN CN201320646914.6U patent/CN203536508U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633282A (en) * | 2013-10-18 | 2014-03-12 | 惠州亿纬锂能股份有限公司 | Internally-arranged protection device type lithium battery |
| CN103633282B (en) * | 2013-10-18 | 2016-01-27 | 惠州亿纬锂能股份有限公司 | A kind of built-in protective device formula lithium battery |
| CN110299249A (en) * | 2019-06-11 | 2019-10-01 | 成都凹克新能源科技有限公司 | A kind of electrochemical energy storing device |
| US12100550B2 (en) | 2019-06-11 | 2024-09-24 | AVX New Energy (Chengdu) Co., Ltd. | Electrochemical energy storage device |
| CN111313077A (en) * | 2020-04-09 | 2020-06-19 | 陈永晓 | Manufacturing method of button lithium battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |
|
| CX01 | Expiry of patent term |