CN202134580U - Lithium ion battery and packaging foil of lithium ion battery - Google Patents
Lithium ion battery and packaging foil of lithium ion battery Download PDFInfo
- Publication number
- CN202134580U CN202134580U CN201120108292U CN201120108292U CN202134580U CN 202134580 U CN202134580 U CN 202134580U CN 201120108292 U CN201120108292 U CN 201120108292U CN 201120108292 U CN201120108292 U CN 201120108292U CN 202134580 U CN202134580 U CN 202134580U
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- Prior art keywords
- lithium ion
- ion battery
- groove
- package foil
- hot melt
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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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Abstract
The utility model relates to the technical field of a lithium ion battery, in particular to a lithium ion battery and a piece of packaging foil of the lithium ion battery. The packaging foil is provided with a pit in a punching way; the periphery of the pit is provided with three encapsulation edges and a foldable edge; and each encapsulation edge is provided with two grooves. Compared with the prior art, the packaging foil has the following different points in structure: each encapsulation edge is provided with the grooves; during the encapsulation of a bare electric core, a hot melt adhesive block of a lug of the packaging foil can be contained in the groove, therefore, the hot melt adhesive block can not be beyond a battery main body to occupy space; and the utility model also provides the lithium ion battery.
Description
Technical field
The utility model belongs to technical field of lithium ion, more specifically relates to a kind of lithium ion battery and package foil thereof.
Background technology
Lithium ion battery is because of advantages such as energy density is high, average open-circuit voltage is high and have extended cycle life have been widely used in moving, portable electronics.Advantage is widely used in consumer electronics sector but flexible packing lithium ion battery is because of its size flexible design, security performance be good etc.
The package foil that commercial flexible packing lithium ion battery is commonly used is formed by three layers usually, is respectively tack coat, metal level and watertight composition.During encapsulation, tack coat is interior, receives after the hot pressing bondingly mutually, reaches sealing effectiveness.When the encapsulation banding at battery pole ear place dress, puncture the inner adhesive linkage of package foil for fear of lug and form short circuit with metal level, the manufacturer can be installed the hot melt blob of viscose additional on the position, encapsulation limit of lug correspondence.After the cell package, the hot melt blob of viscose is between lug and the package foil fully, avoids lug directly to contact with package foil.Simultaneously, the hot melt blob of viscose on the lug must expose the outside certain distance that encapsulates the limit, is in fully between lug and the package foil so that judge PUR intuitively, guarantees that the hot melt blob of viscose plays a protective role.
The package foil structure of prior art is as shown in Figure 1.According to the size of battery, the lithium ion battery package foil is die-cut into certain size, punching press has the square pit 16 that can place naked electric core on package foil simultaneously.Flanging 14 and encapsulation limit 11,12,13 are arranged around the pit 16.Be provided with hot melt blob of viscose 19 on the both positive and negative polarity lug 17,18 of naked electric core.After naked electric core being positioned in the pit 16 of package foil, the both positive and negative polarity lug 17,18 of naked electric core stretches out the lug as battery from encapsulation limit 11.After the encapsulation, the hot melt blob of viscose 19 on the lug exposes the certain length of battery packages paper tinsel, and is as shown in Figure 2.
But it is also increasingly high that miniaturization of electronic products, lightening development require the energy density of lithium ion battery, and this just requires battery in same space, will contribute more capacity.And the battery length dimension that the hot melt blob of viscose that expose at the battery pole ear place can take makes battery main body can not make full use of all spaces, and the capacity of battery can not satisfy higher requirement.
The utility model content
The purpose of the utility model is the deficiency to prior art, and a kind of package foil structure of lithium ion battery is provided.This structure leaves the groove of the certain width and the degree of depth in the position of corresponding lug, after the cell package, the hot melt blob of viscose on the lug is in the groove, keeping can increasing the length of the effective main body of battery under the constant prerequisite of battery total length, promotes the capacity of battery.
To achieve these goals, the utility model adopts following technical scheme:
A kind of lithium ion battery package foil comprises the package foil body, and dashing on the described package foil body has pit, and encapsulation limit and flanging are arranged around the pit, is provided with groove on the encapsulation limit.
For prior art, the utility model structure is being provided with groove on the encapsulation limit relatively, can be when naked electric core encapsulate, and the hot melt blob of viscose of its lug is contained in this groove, makes the hot melt blob of viscose can not exceed battery main body, and takes up space.
As a kind of improvement of the utility model flexible packing lithium ion battery package foil structure, the encapsulation limit on described flanging opposite is provided with groove.
As a kind of improvement of the utility model flexible packing lithium ion battery package foil structure, the encapsulation limit of described flanging side is provided with groove.
As a kind of improvement of the utility model flexible packing lithium ion battery package foil structure, said groove be shaped as rectangle, circular arc or rhombus.The shape of described groove is preferably rectangle, is convenient to the control of machining and shape.
Another purpose of the utility model is, a kind of lithium ion battery is provided, and its technical scheme is following:
A kind of lithium ion battery comprises positive plate, negative plate, is interval in barrier film, electrolyte and package foil between the positive/negative plate, and wherein positive plate comprises positive pole ear; Negative plate comprises negative lug; Include the hot melt blob of viscose on the positive and negative electrode lug, positive and negative plate and barrier film are formed naked electric core, are packaged in the pit of above-mentioned package foil; The lug of described naked electric core stretches out from the groove of described package foil, and the hot melt blob of viscose is in the groove.
The width of said groove guarantees that than the big 1～10mm of width of PUR piece the hot melt blob of viscose on the lug is in inside grooves fully on Width.The width of said groove the hot melt blob of viscose on the assurance lug is in inside grooves fully on Width when, is convenient to production control than the big 3～7mm of width of PUR piece.The length that said hot melt blob of viscose exposes package foil is 0.1～2.5mm.After the cell package, the length that the hot melt blob of viscose is exposed at the package foil outside is 0.1～2.5mm, and the position of hot melt blob of viscose is in groove.Be convenient to judge intuitively that the hot melt blob of viscose is between lug and the package foil fully, guarantee that the hot melt blob of viscose plays a protective role.
The cup depth of said groove is 0.1～2.5mm.
The length that described hot melt blob of viscose exposes package foil is less than or equal to the degree of depth of groove depression.Make said hot melt blob of viscose be in the inside grooves that is provided with on the described package foil after the encapsulation fully; The hot melt blob of viscose exposes the cup depth that the length that encapsulates the limit is no more than said groove; The length that so just the hot melt blob of viscose is exceeded the battery top reduces to zero; Increase the length of the effective main body of electric core to greatest extent, increase the volume space of battery.
With respect to prior art; The length that the utility model structure can make the hot melt blob of viscose on the lug stretch out the battery top significantly shortens, and is keeping can reducing the length that the hot melt blob of viscose exceeds the battery top under the constant prerequisite of battery total length; Increase the length of battery live part, promote the capacity of battery.
The utility model is simple in structure, is convenient to suitability for industrialized production, under the prerequisite that does not change battery raw material, can significantly improve the capacity of battery.
Description of drawings
Fig. 1 is the package foil encapsulating structure figure of prior art;
Fig. 2 is the package foil encapsulation back PUR piece position view of prior art;
Fig. 3 is the utility model package foil encapsulating structure figure;
Fig. 4 is the utility model package foil encapsulation back PUR piece position view;
Fig. 5 is the effective main body figure of package foil encapsulation back battery of embodiment;
Fig. 6 is the effective main body of package foil encapsulation back battery of Comparative Examples.
Embodiment
Come the content of the utility model is further specified below in conjunction with concrete embodiment and accompanying drawing, but the utility model protection scope of the utility model is not limited only to the described content of embodiment.
See Fig. 3-4, according to the size of battery, the lithium ion battery package foil is die-cut into certain size, punching press has the square pit 26 that can place naked electric core on package foil body 2 simultaneously.Flanging 24 and encapsulation limit 21,22,23 are arranged around the pit 26, wherein encapsulate the limit and be provided with groove 25.Be provided with hot melt blob of viscose 29 on the both positive and negative polarity lug 27,28 of naked electric core.After naked electric core being positioned in the pit 26 of package foil, the both positive and negative polarity lug 27,28 of naked electric core stretches out the lug as battery from encapsulation limit 21, and the hot melt blob of viscose 29 on the lug is in the groove 25 that is provided with on the encapsulation limit fully.After the encapsulation, the hot melt blob of viscose 29 on the lug exposes the certain length of battery packages paper tinsel, and hot melt blob of viscose 29 is in the groove 25.
Embodiment
Square lithium ion secondary battery with 454261 models (thickness of finished product battery is 4.5mm, and width is 42mm, and length L 24 is 61mm) is an example.The positive and negative electrode lug of battery is measure-alike, and the size of the hot melt blob of viscose on the lug is also identical.The width L22 in battery top encapsulation zone is 3.0mm.After the encapsulation, the length L 21 that the hot melt blob of viscose exposes package foil is 1.5mm, and width is 10mm.This battery has groove in the position of the corresponding lug in the top encapsulation district of package foil.The width of groove is 12mm, and the cup depth L21 of groove is 1.5mm.
The length L 24 that the length L 23 of the effective main body of battery equals the finished product battery deducts the length that top encapsulation width L22 and hot melt blob of viscose exceed the top encapsulation scope.After adopting the encapsulating structure of this utility model; Because the length that the hot melt blob of viscose exposes is in groove; So the effective principal length L23 of battery of the rectangular lithium ion battery of these embodiment 454261 models is the 58mm (see figure 5), the length of the square pit of the naked electric core of placement that promptly on package foil, stamps out is 58mm.
Comparative Examples
Square lithium ion secondary battery with 454261 models (thickness of finished product battery is 4.5mm, and width is 42mm, and length L 14 is 61mm) is an example.The positive and negative electrode lug size of battery is identical with embodiment, and the size of the hot melt blob of viscose on the lug is also identical with embodiment.The width L12 in battery top encapsulation zone is 3.0mm.After the encapsulation, the length L 11 that the hot melt blob of viscose exposes package foil is 1.5mm, and width is 10mm.
The length L 14 that the length L 13 of the effective main body of battery equals the finished product battery deducts the length L 11 that top encapsulation width L12 and hot melt blob of viscose exceed the top encapsulation scope.The effective principal length L13 of battery of the rectangular lithium ion battery of Comparative Examples 454261 models is the 56.5mm (see figure 6), and the length of the square pit of the naked electric core of placement that promptly on package foil, stamps out is 56.5mm.
The contrast of the battery average size that table 1 is produced for embodiment and Comparative Examples.Can find out that the battery according to the packaged type of the utility model is produced under the situation of size constancy, increased the length of the effective main body of battery, thereby battery capacity is significantly improved also.
The contrast of the battery average size that table 1 embodiment and Comparative Examples are produced
The utility model promotes the capacity of battery keeping can increasing the length of the effective main body of battery under the constant prerequisite of battery total length, and method is simple, is easy to produce implement, and is applicable to the square flexible packing lithium ion battery of various models.
Certainly, the width of the said groove of the utility model can be when guaranteeing that hot melt blob of viscose on the lug be in inside grooves fully on Width, with the width of the groove big 1～10mm of width than PUR piece.
The length that the said hot melt blob of viscose of the utility model exposes package foil is 0.1～2.5mm.After the cell package, the length that the hot melt blob of viscose is exposed at the package foil outside is 0.1～2.5mm, and the position of hot melt blob of viscose is in groove.
The cup depth of the said groove of the utility model can be set to 0.1～2.5mm as required.
Need to prove that according to the announcement and the elaboration of above-mentioned specification, the utility model those skilled in the art can also change and revise above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to also should be in the protection range of the claim of the utility model to some equivalent modifications of the utility model and change.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (10)
1. lithium ion battery package foil; Comprise package foil body (2); It is characterized in that: described package foil body (2) is gone up to dash has pit (26), and encapsulation limit (21,22,23) and flanging (24) are arranged around the pit, is provided with groove (25) on encapsulation limit (21,22,23).
2. according to a kind of lithium ion battery package foil described in the claim 1, it is characterized in that: the encapsulation limit (21) relative with flanging (24) is provided with groove (25).
3. according to a kind of lithium ion battery package foil described in the claim 1, it is characterized in that: the encapsulation limit (22,23) adjacent with flanging (24) is provided with groove (25).
4. according to a kind of lithium ion battery package foil described in the claim 1, it is characterized in that: said groove (25) be shaped as rectangle, circular arc or rhombus.
5. lithium ion battery; Comprise positive plate, negative plate, be interval in barrier film, electrolyte and package foil between the positive/negative plate; Wherein positive plate comprises positive pole ear (27), and negative plate comprises negative lug (28), includes hot melt blob of viscose (29) on the positive and negative electrode lug; Positive and negative plate and barrier film are formed naked electric core; It is characterized in that: said naked electric core is packaged in the pit (26) of the package foil described in the claim 1-4, and the lug of described naked electric core (27,28) stretches out from the groove (25) of described package foil, and hot melt blob of viscose (29) is in the groove (25).
6. according to a kind of lithium ion battery described in the claim 5, it is characterized in that: the width of said groove (25) is than the big 1～10mm of width of PUR piece (29).
7. according to a kind of lithium ion battery described in the claim 5, it is characterized in that: the width of said groove (25) is than the big 3～7mm of width of PUR piece (29).
8. according to a kind of lithium ion battery described in the claim 5, it is characterized in that: the length that said hot melt blob of viscose (29) exposes package foil is 0.1～2.5mm.
9. according to a kind of lithium ion battery described in the claim 5, it is characterized in that: the cup depth of said groove (25) is 0.1～2.5mm.
10. according to a kind of lithium ion battery described in the claim 5, it is characterized in that: the length that described hot melt blob of viscose (29) exposes package foil is less than or equal to the degree of depth that groove (25) caves in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120108292U CN202134580U (en) | 2011-04-14 | 2011-04-14 | Lithium ion battery and packaging foil of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120108292U CN202134580U (en) | 2011-04-14 | 2011-04-14 | Lithium ion battery and packaging foil of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202134580U true CN202134580U (en) | 2012-02-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120108292U Expired - Lifetime CN202134580U (en) | 2011-04-14 | 2011-04-14 | Lithium ion battery and packaging foil of lithium ion battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN202134580U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201412A (en) * | 2014-09-11 | 2014-12-10 | 超源精密电子设备(东莞)有限公司 | Manufacturing method of encapsulated battery |
| CN111837253A (en) * | 2018-03-21 | 2020-10-27 | 宁德新能源科技有限公司 | Battery cell packaging structure |
| CN113826275A (en) * | 2020-03-31 | 2021-12-21 | 宁德新能源科技有限公司 | Battery packaging structure |
-
2011
- 2011-04-14 CN CN201120108292U patent/CN202134580U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201412A (en) * | 2014-09-11 | 2014-12-10 | 超源精密电子设备(东莞)有限公司 | Manufacturing method of encapsulated battery |
| CN111837253A (en) * | 2018-03-21 | 2020-10-27 | 宁德新能源科技有限公司 | Battery cell packaging structure |
| CN113826275A (en) * | 2020-03-31 | 2021-12-21 | 宁德新能源科技有限公司 | Battery packaging structure |
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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: 20120201 |
|
| CX01 | Expiry of patent term |