CN201069784Y - A soft packing battery - Google Patents
A soft packing battery Download PDFInfo
- Publication number
- CN201069784Y CN201069784Y CNU2007201278344U CN200720127834U CN201069784Y CN 201069784 Y CN201069784 Y CN 201069784Y CN U2007201278344 U CNU2007201278344 U CN U2007201278344U CN 200720127834 U CN200720127834 U CN 200720127834U CN 201069784 Y CN201069784 Y CN 201069784Y
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- CN
- China
- Prior art keywords
- sealing strip
- electric core
- battery
- side seal
- seal limit
- 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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- 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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- Sealing Battery Cases Or Jackets (AREA)
Abstract
A soft-package battery includes a battery core wrapped by packaging material, the battery core has a plurality of lateral seal edges on the two opposite lateral edges thereof and an end seal edge on the side where a polar ear is provided, the lateral seal edges are attached on the lateral surfaces of the battery core respectively, the end seal edge is attached on the end surface of the battery core, and a plurality of joint parts are arranged at the seam of the lateral seal edges and the end seal edge. Since the plurality of joint parts are arranged at the seam of the lateral seal edges and the end seal edge, compared with conventional battery in which the lateral seal edges and the end seal edge are integrated in the connection position, redundant material is removed to form the joint parts, so the overlapped part that affects the density of the battery energy in prior art is eliminated to a larger extent.
Description
Technical field
The utility model relates to a kind of flexible-packed battery.
Background technology
Traditional lithium ion battery uses the electric core of receiving fluids electrolyte usually, uses the rigid package (as box hat) of sealing to encapsulate this electricity core then, thereby makes battery.Yet, along with practical application is more and more higher to the requirement of energy content of battery density and security performance, polymer battery and the flexible-packed battery that holds colloidal electrolyte appearred using.
In polymer battery, the electrolyte in the electric core is colloidal state, can adopt soft package technology, should the electricity core by the aluminum-plastic composite membrane material package, thus make battery.In flexible-packed battery, the electrolyte in the electric core can be liquid state, also adopts soft package technology that electric core is encapsulated, thereby makes battery.For these two kinds of batteries, all adopt soft package technology to use thin packaging material that electric core is encapsulated, thereby, have the high advantage of energy density, and the battery of making can have multiple different shape as required.
In order to realize encapsulation to the flexible-packed battery core, CN2605667Y discloses a kind of sealing strip structure of flexible-packed battery core, as shown in Figure 1, sealing limit structure comprises: battery 1, three sides of battery 1 are provided with the sealing strip 2,3,4 that hot pressing forms, wherein, two relative sealing strips 2,4 are about 90 degree bendings along its root and battery 1 main body.In addition, the sealing strip 3 that battery 1 positive and negative lead wires stretches out is about 90 bendings along its root and battery 1 main body, and superimposed 5 of its sealing strip relative with above-mentioned two 2,4 is affixed on respectively on the described two relative sealing strips 2,4 after the bending.
In the sealing strip structure of the flexible-packed battery core that in CN2605667Y, provides, because " sealing strip that the battery positive and negative lead wires stretches out is about 90 along its root and battery main body and bends; and superimposed of its sealing strip relative with above-mentioned two is affixed on respectively on the described two relative sealing strips after the bending ", thereby on two opposite flanks of battery, has superimposed portion respectively, the existence of this superimposed portion makes the battery of making can not effectively utilize installing space, and the energy density of battery is had a negative impact.
The utility model purpose
The purpose of this utility model is, in order to overcome in the battery of making according to the flexible package electricity core sealing strip structure of prior art, owing to the defective that exists superimposed to influence energy content of battery density, thereby and provide a kind of superimposed battery that do not have with relative higher energy density.
A kind of flexible-packed battery, described battery comprises the electric core by the packaging material parcel, has the side seal limit on two relative sides of described electric core, the side that described electric core has lug has the end sealing strip, described side seal limit fits in the side of described electric core respectively, the end face that described end sealing strip fits in described electric core wherein, described side seal limit has seam portion with the intersection of end sealing strip.
Owing to be provided with seam portion in side seal limit and the junction of holding sealing strip, like this, be structure as a whole in this junction with the end sealing strip with side seal limit in the traditional battery and compare, form seam portion by having removed the unnecessary material of part, thereby removed the superimposed portion that influences energy content of battery density in the prior art largely.
Description of drawings
Fig. 1 is the schematic diagram of the flexible package electricity core sealing strip structure of prior art;
Fig. 2 is the schematic diagram of superimposed portion in the flexible-packed battery of prior art among Fig. 1;
The schematic diagram of flexible-packed battery before packing that Fig. 3 provides for the utility model;
The schematic diagram of flexible-packed battery after packing that Fig. 4 provides for the utility model;
Fig. 5 is the schematic diagram of flexible-packed battery among Fig. 3;
Fig. 6 is the part enlarged diagram of flexible-packed battery among Fig. 5;
Fig. 7 is the schematic diagram of the process of expression packing flexible-packed battery of the present utility model.
Embodiment
Below with reference to accompanying drawing embodiment of the present utility model is described in detail.
As shown in Figure 3 and Figure 4, the flexible-packed battery that the utility model provides comprises the electric core 1 by the packaging material parcel, have side seal limit 10 and 11 on two opposite sides of described electric core 1, the end that described electric core 1 has lug 15 has end sealing strip 13, described side seal limit 10 and 11 fits in the side of described electric core 1 respectively, described end sealing strip 13 fits in the end face of described electric core 1, and wherein, described side seal limit 10 and 11 has seam portion 14 with the intersection of holding sealing strip 3 respectively.For side seal limit 10 and 11 being fitted in the side of electric core 1 and will hold schematic diagram before sealing strip 13 is fitted in the end face of electric core 1, Fig. 4 is being fitted in side seal limit 10 and 11 side of electric core 1 and will holding schematic diagram after sealing strip 13 is fitted in the end face of electric core 1 among Fig. 3.
Owing to remove at the material that described intersection is unnecessary with part, thereby between side seal limit 10,11 and end sealing strip 13, form seam portion 14, like this, when with described side seal limit 10 and 11 and end sealing strip 13 when being fitted in two sides of electric core 1 and end face respectively, can not form in the battery of the prior art as shown in Fig. 1 and Fig. 2 and have superimposed 5 that occupies than large space, or the superimposed portion that this place is formed is reduced to a certain extent.
Packing electric core main body and form electric core 1 with packaging material is that those of ordinary skills are known, and packaging material can be selected multiple composite material, as plastic-aluminum combined membrane material.After using packaging material to be packaged into electric core 1, can use hot pressing with the packaging material tape edge, thereby form the battery as shown in Fig. 3 and Fig. 5, wherein, have side seal limit 10 and 11 on two opposite sides of electricity core 1, the end that described electric core 1 has lug 15 has end sealing strip 13.The lug 15 of electricity core 1 stretches out in electric core 1.
After edge sealing is finished, have enough energy densities in order to ensure the battery of making, need reduce side seal limit 10 and 11 and the occupied space of end sealing strip 13 to the full extent.Obviously, side seal limit 10 and 11 need be fitted in respectively on the side of each self-corresponding electric core 1, end sealing strip 13 be fitted in the end of the electric core 1 that lug 15 extends.
As depicted in figs. 1 and 2, when making side seal limit and end sealing strip be fitted in each self-corresponding surface respectively, because the side seal limit is formed with unnecessary material with the intersection of end sealing strip, thereby, the material at this place is on described side seal limit with after holding sealing strip to be fitted in each self-corresponding surface respectively, form redundance, promptly superimposed 5.
And in battery provided by the utility model, as shown in Figure 3 and Figure 4, after finishing tape edge by hot pressing, side seal limit 10 and 11 and the intersection of end sealing strip 13 form seam portion 14, that is to say the part or all of excess stock of this intersection is removed, and how much what material was removed can be determined according to concrete applicable cases, but can not remove too much material, in order to avoid destroy the sealing of packaging material at this intersection.
For example, seam portion 14 can be for square before fitting, and this square limit is parallel to side seal limit 10,11 and end sealing strip 13 respectively.In the preferred case, in order to remove unnecessary material to the full extent, the length of described square seam portion 14 equals to hold the width of sealing strip 13, and the width of described square seam portion 14 equals the width on side seal limit.Described square rectangle and the square of comprising.Thereby after applying, described square seam portion 14 comprises the edge that described side seal limit 10,11 and end sealing strip 13 are fitted mutually, as shown in Figure 4.
Described seam portion 14 can also be triangle before fitting, that is: for example on side seal limit 10, select a bit, on end sealing strip 13, select a bit, described 2 all are close to side seal limit 10 and the intersection of holding sealing strip 13, along described 2 straight lines that are linked to be, excess stock is removed then.Remove the above-mentioned selection of how much depending on of excess stock at 2, can determine as the case may be.Described seam portion 14 can also be the triangle on arc limit for one side before fitting, that is: on side seal limit 10, select a bit, on end sealing strip 13, select a bit, described 2 all are close to side seal limit 10 and the intersection of holding sealing strip 13, then along described 2 circular arc of process, excess stock is removed, thereby formed seam portion 14.Thereby seam portion 14 comprises that described side seal limit 10,11 and end sealing strip 13 are from one end to the other side apart from becoming big edge gradually after applying.
When in described side seal limit 10 and 11 and the intersection of end between the sealing strip 13 when removing the part material, the thickness of packaging material reduces to a certain extent, thereby, in the preferred case, in order further to guarantee the sealing of packaging material, the edge 16 that two opposite flanks that described electric core 1 has side seal limit 10 and 11 and two corners that the end face with end sealing strip 13 has a common boundary are circular arc, as shown in Figure 6.Because described two corners form circular arc, like this, after the part material of described intersection is removed, increased the thickness of packaging material, thereby further guaranteed the sealing of packaging material at this intersection.
As shown in Figure 7, after will holding sealing strip 13 to be fitted in the end face of electric core 1, then lug 15 can move together along with end sealing strip 13, and presents the structure shown in Fig. 7 (c).In the prior art, lug 15 is 90 degree bendings along its root and electric core 1, the end face that lug 15 is fitted perpendicular to end sealing strip 13 presents structure as shown in Figure 2.
Yet, though by removing the excess stock of described intersection, and superimposed 5 is partly or entirely removed, and then improved the energy density of battery, but, because lug 15 is longer in the length of extending along electric core 1 length direction, thereby can influence the battery made energy density owing to lug 15 at electric core 1 length direction.And the length of lug 15 can not be simply by cutting out short shortening, because can influence the electric conductivity of battery.
Thereby, in the preferred case, described lug 15 is divided into two parts, and the part of close lug 15 roots is fitted in described electric core 1 to be had on the end face of end sealing strip 13, and the part adjacent with lug 15 ends has the end face of end sealing strip 13 perpendicular to described electric core 1.This can realize as follows: hot pressing forms the electric core with side seal limit and end sealing strip, shown in Fig. 7 (a); Form seam portion, shown in Fig. 7 (b); Side seal limit and end sealing strip are fitted in respectively on the side and end face of each self-corresponding electric core, and this moment, lug 15 was parallel to the end face of the electric core with end sealing strip, shown in Fig. 7 (c); , then, with lug 15 double flats, shown in Fig. 7 (d); At last, with stretching out in part bending 90 degree of the lug 15 outside the electric core, make the end face of this part, shown in Fig. 7 (e) perpendicular to electric core with end sealing strip.
The position of lug 15 is set according to the method described above, and then the length of lug 15 on electric core 1 length direction is reduced, thereby has improved the energy density of battery on electric core 1 length direction of making.
The flexible-packed battery that the utility model provides by the excess stock removal with side seal limit and end sealing strip intersection, and has been removed the superimposed portion that has in the prior art to a certain extent, thereby has improved the energy density of battery.And, the part by lug 15 being had fit in electric core end face and perpendicular to the part of this end face with end sealing strip, and reduced the length of lug 15 on electric core length direction, thus also improved the energy density of battery.
Claims (5)
1. flexible-packed battery, described battery comprises the electric core (1) by the packaging material parcel, has side seal limit (10 on two opposite sides of described electric core (1), 11), the end that described electric core (1) has lug (15) has end sealing strip (13), described side seal limit (10,11) fit in the side of described electric core (1) respectively, described end sealing strip (13) fits in the end face of described electric core (1), it is characterized in that, described side seal limit (10,11) has seam portion (14) with the intersection of end sealing strip (13).
2. flexible-packed battery according to claim 1 is characterized in that, described seam portion (14) comprises the edge that described side seal limit (10,11) and end sealing strip (13) are fitted mutually.
3. flexible-packed battery according to claim 1 is characterized in that, described seam portion (14) comprises described side seal limit (10,11) and holds sealing strip (13) from one end to the other side apart from becoming big edge gradually.
4. flexible-packed battery according to claim 1 is characterized in that, described electric core (1) has two opposite sides on side seal limit (10,11) and has two corners of the end boundary of end sealing strip (13), the edge with circular arc.
5. flexible-packed battery according to claim 1, it is characterized in that, described lug (15) comprises two parts, the part adjacent with lug (15) root fitted with the end face that described electric core (1) has end sealing strip (13), and the part adjacent with lug (15) end has the end face of end sealing strip (13) perpendicular to described electric core (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201278344U CN201069784Y (en) | 2007-07-25 | 2007-07-25 | A soft packing battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201278344U CN201069784Y (en) | 2007-07-25 | 2007-07-25 | A soft packing battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201069784Y true CN201069784Y (en) | 2008-06-04 |
Family
ID=39491173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201278344U Expired - Lifetime CN201069784Y (en) | 2007-07-25 | 2007-07-25 | A soft packing battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201069784Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190198909A1 (en) * | 2017-12-27 | 2019-06-27 | Ningde Amperex Technology Limited | Battery |
| WO2019196073A1 (en) * | 2018-04-12 | 2019-10-17 | 宁德新能源科技有限公司 | Battery |
| WO2021109670A1 (en) * | 2019-12-06 | 2021-06-10 | 宁德新能源科技有限公司 | Packaging structure and battery cell using same |
-
2007
- 2007-07-25 CN CNU2007201278344U patent/CN201069784Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190198909A1 (en) * | 2017-12-27 | 2019-06-27 | Ningde Amperex Technology Limited | Battery |
| WO2019127107A1 (en) * | 2017-12-27 | 2019-07-04 | 宁德新能源科技有限公司 | Battery |
| US11362363B2 (en) * | 2017-12-27 | 2022-06-14 | Ningde Amperex Technology Limited | Battery |
| WO2019196073A1 (en) * | 2018-04-12 | 2019-10-17 | 宁德新能源科技有限公司 | Battery |
| EP3624209A4 (en) * | 2018-04-12 | 2021-01-06 | Ningde Amperex Technology Limited | Battery |
| JP2021518037A (en) * | 2018-04-12 | 2021-07-29 | 寧徳新能源科技有限公司Ｎｉｎｇｄｅ Ａｍｐｅｒｅｘ Ｔｅｃｈｎｏｌｏｇｙ Ｌｉｍｉｔｅｄ | battery |
| WO2021109670A1 (en) * | 2019-12-06 | 2021-06-10 | 宁德新能源科技有限公司 | Packaging structure and battery cell using same |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080604 |