CN204809305U - Soft -packing secondary cell - Google Patents
Soft -packing secondary cell Download PDFInfo
- Publication number
- CN204809305U CN204809305U CN201520558785.4U CN201520558785U CN204809305U CN 204809305 U CN204809305 U CN 204809305U CN 201520558785 U CN201520558785 U CN 201520558785U CN 204809305 U CN204809305 U CN 204809305U
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- CN
- China
- Prior art keywords
- secondary battery
- soft package
- ptc element
- lug
- packaging bag
- 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
Abstract
The utility model provides a soft -packing secondary cell, it includes electric core, PTC component and wrapping bag. The electricity core includes: the mass flow body, and utmost point ear, the electricity is connected in the mass flow body. PTC component series connection is in utmost point ear. The wrapping bag is used for encapsulating electric core. Wherein, space between the PTC component top that is located the wrapping bag and is located electric core is distinguished with the closedtop seal of wrapping bag. Soft -packing secondary cell in, space between distinguishing with the closedtop seal of wrapping bag through the top that makes the PTC component arrange in the wrapping bag and to be located electric core, therefore the PTC component does not occupy the space of electric in -core portion to the increase of avoiding bringing electric core thickness can not arouse that battery power density descends, and before electric core thermal runaway, and timely circuit break.
Description
Technical field
The utility model relates to a kind of field of lithium ion battery, particularly relates to a kind of secondary battery of soft package.
Background technology
Overcharge in battery core, the abuse test such as short circuit time, the lug of band PTC element is built in battery core and is more conducive in time the heat that battery core inside produces being passed to PTC element, reaches PTC resistance and raises, cut off the effect of circuit.
At present, PTC element is directly placed in winding battery core inner, good heat transmission effect can be reached, PTC element is made to play the effect cutting off circuit in time when battery core is overheated, but the thickness of PTC element is larger, thickness is generally more than 300 microns, and be placed on the obvious increase that winding battery core inside can cause cell thickness, battery energy density declines.Usual CE class battery core thinner thickness, is generally 1 ~ 10mm, and the battery core thickness increase that PTC element brings is unacceptable.
Utility model content
In view of Problems existing in background technology, an object of the present utility model is to provide a kind of secondary battery of soft package, and it can avoid the increase bringing battery core thickness, and battery energy density can not be caused to decline.
Another object of the present utility model is to provide a kind of secondary battery of soft package, and it can cut off circuit in time before battery core thermal runaway.
To achieve these goals, the utility model provides a kind of secondary battery of soft package, and it comprises battery core, PTC element and packaging bag.Battery core comprises: collector; And lug, be electrically connected on collector.PTC element is connected in series in lug.Packaging bag is used for packaging electric core.Wherein, PTC element to print in the space between district at the closedtop of the top of battery core and packaging bag in packaging bag.
The beneficial effects of the utility model are as follows: in secondary battery of soft package described in the utility model, to be placed in packaging bag by making PTC element and to print in the space between district at the closedtop of the top of battery core and packaging bag, therefore PTC element does not take the space of battery core inside, thus avoid the increase bringing battery core thickness, battery energy density can not be caused to decline, and before battery core thermal runaway, circuit can also be cut off in time.
Accompanying drawing explanation
Fig. 1 is the structural representation of collector, lug and PTC according to secondary battery of soft package of the present utility model;
Fig. 2 is the structural representation being built in battery core top according to the PTC of secondary battery of soft package of the present utility model.
Wherein, description of reference numerals is as follows:
1 battery core 2PTC element
11 collector 3 packaging bags
12 lug 31 closedtop print districts
121 lug afterbody 4 insulating tapes
122 lug head part S insulation viscose glues
13 tops
Embodiment
Describe in detail with reference to the accompanying drawings according to secondary battery of soft package of the present utility model.
Referring to figs. 1 through Fig. 2, comprise battery core 1, PTC element 2 and packaging bag 3 according to secondary battery of soft package of the present utility model.Battery core 1 comprises: collector 11; And lug 12, be electrically connected on collector 11.PTC element 2 is connected in series in lug 12.Packaging bag 3 is for packaging electric core 1.Wherein, PTC element 2 to print in the space between district 31 at the top 13 of battery core 1 and the closedtop of packaging bag 3 in packaging bag 3.
In secondary battery of soft package described in the utility model, to be placed in packaging bag 3 by making PTC element 2 and to print in the space between district 31 at the top 13 of battery core 1 and the closedtop of packaging bag 3, therefore PTC element 2 does not take the space of battery core 1 inside, thus avoid the increase bringing battery core 1 thickness, battery energy density can not be caused to decline, and before battery core 1 thermal runaway, circuit can also be cut off in time.Here remark additionally, the thermal runaway of battery core 1 comprises abuse test short circuit, overcharges or drift bolt, utilizes PTC element 2 to cut off circuit in time, and battery core 1 can be protected fast can not to burn or explode when thermal runaway.
Here remark additionally, collector 11 is provided with active material diaphragm (not shown), battery core 1 also comprises barrier film (not shown), but only lists the feature relevant to the utility model here.Lug 12 is by welding or be one-body moldedly electrically connected on collector 11.
In one embodiment, see figures.1.and.2, lug 12 can comprise: lug afterbody 121, and one end is electrically connected on collector 11 and the other end is electrically connected on PTC element 2; And lug head 122, one end is electrically connected on the described other end of lug afterbody 121 by PTC element 2, the other end of lug head 122 stretches out in packaging bag 3 and is connected with external circuit, and a part for lug head 122 is in the closedtop print district 31 of packaging bag 3, thus lug 12 is in Z-shaped.Wherein, the electrical connection between described one end of lug afterbody 121 and collector 11 can adopt welding manner, is certainly not limited thereto.Lug afterbody 121 can be one-body molded by collector 11, and the described other end of lug afterbody 121 is electrically connected on PTC element 2 by welding (such as butt welding or overlap welding); And lug head 122 is prepared separately, the described other end of lug head 122 is electrically connected on PTC element 2 by welding (such as butt welding or overlap welding) or alternate manner.Above-mentioned welding can be ultra-sonic welded.
In one embodiment, see figures.1.and.2, the described part that lug head 122 is in the closedtop print district 31 of packaging bag 3 is enclosed with insulation viscose glue S.Thus, the described part that lug head 122 can be in the closedtop print district 31 of packaging bag 3 by insulation viscose glue S is bonded together with packaging bag 3, further electric isolution simultaneously.
In one embodiment, with reference to Fig. 2, secondary battery of soft package also can comprise: insulating tape 4, is pasted onto on PTC element 2, to make PTC element 2 and battery core 1 electric isolution.
In one embodiment, on the top 13 that insulating tape 4 also can be attached to the close battery core 1 of PTC element 2 and two sides away from battery core 1, as shown in Figure 2; Or insulating tape 4 is attached in the one side at the top 13 of the close battery core 1 of PTC element 2.
In one embodiment, insulating tape 4 wraps up whole PTC element 2, and in other words the outer surface of PTC element 2 is all wrapped up by insulating tape 4.
In one embodiment, with reference to Fig. 2, insulating tape 4 can be green glue.
According in secondary battery of soft package described in the utility model, collector 11 can be at least one in positive collector and negative current collector.In other words, in battery core 1, negative current collector and/or plus plate current-collecting body all can adopt collector 11, and now the collector 11 of lug 12 counter electrode is all electrically connected on PTC element 2 by the lug 12 of counter electrode.
According in secondary battery of soft package described in the utility model, packaging bag 3 can be aluminum plastic film.
According in secondary battery of soft package described in the utility model, secondary battery of soft package can be lithium ion battery.Certainly being not limited thereto, can be sodium-ion battery, Zinc ion battery etc.
Claims (10)
1. a secondary battery of soft package, comprising:
Battery core (1), comprising:
Collector (11); And
Lug (12), is electrically connected on collector (11);
PTC element (2), is connected in series in lug (12); And
Packaging bag (3), for packaging electric core (1);
It is characterized in that, PTC element (2) is positioned at packaging bag (3) and the closedtop at the top (13) and packaging bag (3) that are positioned at battery core (1) prints space between district (31).
2. secondary battery of soft package according to claim 1, is characterized in that, described lug (12) comprising:
Lug afterbody (121), one end is electrically connected on collector (11) and the other end is electrically connected on PTC element (2); And
Lug head (122), one end is electrically connected on the described other end of lug afterbody (121) by PTC element (2), the other end of lug head (122) stretches out in packaging bag (3) and is connected with external circuit, and a part for lug head (122) is in closedtop print district (31) of packaging bag (3).
3. secondary battery of soft package according to claim 2, is characterized in that, the described part that lug head (122) is in closedtop print district (31) of packaging bag (3) is enclosed with insulation viscose glue (S).
4. secondary battery of soft package according to claim 1, is characterized in that, secondary battery of soft package also comprises:
Insulating tape (4), is pasted onto on PTC element (2), to make PTC element (2) and battery core (1) electric isolution.
5. secondary battery of soft package according to claim 4, is characterized in that,
Insulating tape (4) is attached on the top (13) of close battery core (1) of PTC element (2) and the two sides away from battery core (1); Or
Insulating tape (4) is attached to (2) of PTC element in the one side at the top (13) of battery core (1).
6. secondary battery of soft package according to claim 4, is characterized in that, insulating tape (4) wraps up whole PTC element (2).
7. secondary battery of soft package according to claim 4, is characterized in that, insulating tape (4) is green glue.
8. secondary battery of soft package according to claim 1, is characterized in that, collector (11) is at least one in positive collector and negative current collector.
9. secondary battery of soft package according to claim 1, is characterized in that, packaging bag (3) is aluminum plastic film.
10. secondary battery of soft package according to claim 1, is characterized in that, secondary battery of soft package is lithium ion battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558785.4U CN204809305U (en) | 2015-07-29 | 2015-07-29 | Soft -packing secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558785.4U CN204809305U (en) | 2015-07-29 | 2015-07-29 | Soft -packing secondary cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204809305U true CN204809305U (en) | 2015-11-25 |
Family
ID=54594080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520558785.4U Active CN204809305U (en) | 2015-07-29 | 2015-07-29 | Soft -packing secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204809305U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017125041A1 (en) * | 2016-01-20 | 2017-07-27 | 瑞侃电子(上海)有限公司 | Protective apparatus used in battery cell |
-
2015
- 2015-07-29 CN CN201520558785.4U patent/CN204809305U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017125041A1 (en) * | 2016-01-20 | 2017-07-27 | 瑞侃电子(上海)有限公司 | Protective apparatus used in battery cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |