CN210926193U - Soft packet of lithium ion battery, battery package and electric automobile - Google Patents
Soft packet of lithium ion battery, battery package and electric automobile Download PDFInfo
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- CN210926193U CN210926193U CN201922326935.XU CN201922326935U CN210926193U CN 210926193 U CN210926193 U CN 210926193U CN 201922326935 U CN201922326935 U CN 201922326935U CN 210926193 U CN210926193 U CN 210926193U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model is suitable for a lithium ion battery field provides a soft packet of lithium ion battery, battery package and electric automobile. The soft package lithium ion battery comprises an aluminum plastic film packaging body and a naked battery cell packaged in the aluminum plastic film packaging body, and is characterized in that the naked battery cell comprises a core main body and a core main body adding part connected with the core main body; the aluminum-plastic film packaging body is provided with a core main body punching pit and a core main body adding part punching pit which are matched with the core main body and the shape and the position of the core main body adding part; the punching pit of the core main body adding part is arranged in a gap structure formed between the lug-naked electric core welding part and the lug-aluminum plastic film packaging line. The utility model provides a soft packet of lithium ion battery under the condition of same plastic-aluminum membrane material quantity, can improve the volume that improves naked electric core to improve the whole energy density of naked electric core.
Description
Technical Field
The utility model belongs to the lithium ion battery field especially relates to a soft packet of lithium ion battery to and contain this soft packet of lithium ion battery's battery package and electric automobile.
Background
Since 1991 the first commercial lithium battery was marketed by the company sony, japan, the development of lithium batteries has been over 30 years, and lithium batteries have advantages of high energy density, high operating voltage, many cycle life times, and the like, and are widely used in various fields in our lives. The soft package battery has the characteristics of small volume and high energy density, and is widely applied to the fields of new energy automobiles and 3C consumer electronics.
The existing soft package lithium ion battery packaging body material mainly uses an aluminum plastic film. The packaging process of the soft package lithium ion battery is mainly as follows: the bare lithium ion battery cell welded with the tab structure is arranged in a pit punching structure (mainly the pit punching shape is square) matched with the bare cell structure and punched in the aluminum plastic film prefabrication, then hot-press packaging is carried out on the peripheral side of the aluminum plastic film packaging body, and the whole aluminum plastic film packaging body forms a sealing structure by utilizing the hot melting and the bonding of a high polymer bonding layer on the surface layer of the aluminum plastic film.
The soft package lithium ion battery prepared in the prior art has an unused space at the two sides of the positive electrode tab and the negative electrode tab of the battery with the electrode tabs on the opposite sides or between the positive electrode tab and the negative electrode tab of the battery with the electrode tabs on the same side, so that waste is caused.
To further illustrate the deficiencies in the prior art, a soft-package lithium ion battery with positive and negative electrode tabs located on the same side is taken as an example for description, please refer to fig. 1. In naked electric core structure, positive and negative pole ear 10 welds on naked electric core 20 to form the utmost point ear-naked electric core welding part 11 that has certain height, thickness and length with naked electric core 20 junction. In the packaging process, for the sake of completeness and tightness of packaging, the upper part of the tab welding part is provided with tab glue 12, and the tab glue 12 and the aluminum-plastic film packaging body 30 are used for hot-press welding packaging, so that a reliable tab-aluminum-plastic film packaging line is formed. As can be seen from fig. 1, the void structure 31 is generated just because there is a certain height difference between the tab-bare cell welding part 11 and the tab-aluminum plastic film packaging line. The void structure 31 does not belong to the package structure, and does not accommodate any cell structure, thereby forming an independent unused space and causing space waste.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art explained in the background art, provide a soft packet of lithium ion battery, its capacity that aims at improving soft packet of lithium ion battery under the condition that consumes same raw and other materials.
The utility model discloses the technological effect that will reach is realized through following scheme:
the utility model provides a soft package lithium ion battery, which comprises an aluminum plastic film packaging body and a naked electric core packaged in the aluminum plastic film packaging body, wherein the naked electric core comprises a core main body and a core main body adding part connected with the core main body; the aluminum-plastic film packaging body is provided with a core main body punching pit and a core main body adding part punching pit which are matched with the core main body and the shape and the position of the core main body adding part;
the punching pit of the core main body adding part is arranged in a gap structure formed between the lug-naked electric core welding part and the lug-aluminum plastic film packaging line.
By adopting the technical scheme, the capacity of the soft package lithium ion battery is improved under the condition of consuming the same raw materials.
Further, the shape and structure of the core main body adding part are square or trapezoid.
By adopting the technical scheme, the capacity of the soft package lithium ion battery is increased.
Further, the edges of the core main body adding part are all in a chamfer transition structure.
Through adopting above-mentioned technical scheme, can avoid sharp-pointed corner to the conflict of plastic-aluminum membrane and break through the condition of plastic-aluminum membrane.
Further, the radius of the chamfer transition structure is 1.0-2.5 mm.
By adopting the technical scheme, the situation that the corner collides with the aluminum-plastic film to break the aluminum-plastic film is further reduced.
Further, the outer surface of the core main body adding part is of a slope structure.
Through adopting above-mentioned technical scheme to be favorable to reducing the risk that is broken by the connecting angle when the plastic-aluminum membrane is pressed and is pasted in interpolation portion.
Further, the length of the core main body adding part is 5.0-25.0mm, and the thickness is 2.0-20.0 mm.
Through adopting above-mentioned technical scheme, combine the thickness and the position of utmost point ear-naked electric core welding part, core main part interpolation portion length and thickness are comparatively suitable with the void structure in this within range to increase soft packet of lithium ion battery's capacity.
Furthermore, positive and negative electrode lugs of the soft package lithium ion battery are positioned on the same side, and the number of the punching pits of the adding part of the core main body is 1-3.
By adopting the technical scheme, the punching pits of the adding part of the core main body are positioned between the positive and negative electrode lugs or/and on two sides of the positive and negative electrode lugs, so that a gap structure between the positive and negative electrode lugs or/and on two sides of the positive and negative electrode lugs is effectively filled, and the capacity of the soft package lithium ion battery is increased.
Furthermore, positive and negative electrode lugs of the soft package lithium ion battery are positioned on opposite sides, and the number of the punched pits of the adding part of the core main body is 1-4.
Through adopting above-mentioned technical scheme, core main part adds the portion and dashes the hole and be located one side or both sides of positive and negative pole ear to effectively fill the void structure of one side or both sides of positive and negative pole ear, increase soft packet of lithium ion battery's capacity.
The utility model discloses in still provide a battery package, this battery package contains promptly the utility model discloses well soft packet of lithium ion battery who mentions.
Through adopting above-mentioned technical scheme, can effectively improve the capacity of battery package.
The utility model discloses in still provide an electric automobile, this electric automobile contains promptly the utility model discloses in the battery package mentioned.
Through adopting above-mentioned technical scheme, can effectively improve the capacity as power supply battery package among the electric automobile, accord with the design requirement to power supply module small volume, high capacity in the electric automobile design.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a soft-packaged lithium ion battery in the prior art after packaging (positive and negative electrode tabs are located on the same side);
fig. 2 is a schematic diagram of a first connection of a soft package lithium ion battery according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an aluminum plastic film package in the structure of FIG. 2;
fig. 4 is a schematic diagram of a second connection of a soft package lithium ion battery according to an embodiment of the present invention;
fig. 5 is a third connection schematic diagram of the soft package lithium ion battery in the embodiment of the present invention.
The reference numbers illustrate:
10. a positive electrode tab and a negative electrode tab; 11. welding parts of the lug and the naked battery cell; 12. gluing a tab; 20. a naked battery cell; 21. a core body; 22. a core main body addition part; 30. an aluminum plastic film package; 31. a void structure; 32. punching a pit on the core main body; 33. the core main body adding part is punched with pits.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It should be noted that the terms of left, right, upper and lower directions in the embodiments of the present invention are only relative concepts or are referred to the normal use state of the product, and should not be considered as limiting.
Please refer to fig. 1. The positive and negative electrode lugs 10 of the existing soft package lithium ion battery are welded on the naked battery cell 20, so that a lug-naked battery cell welding part 11 with certain height, thickness and length is formed at the joint of the positive and negative electrode lugs and the naked battery cell 20. The tab glue 12 on the positive and negative electrode tabs 10 and the aluminum plastic film package 30 are sealed by hot-press welding, so as to form a reliable tab-aluminum plastic film package line (since the package line is overlapped with the tab glue 12, the package line is not separately marked in the drawing, and a person skilled in the art can unambiguously confirm the position of the package line from fig. 1). As can be seen from fig. 1, a certain height difference exists between the tab-bare cell welding portion 11 and the tab-aluminum plastic film packaging line, so that a void structure 31 is generated, and space is wasted.
In the soft package lithium ion battery provided in the present embodiment, the core main body addition part 22 is added to the position of the void structure 31, so that the capacity of the soft package lithium ion battery is increased while consuming the same material.
Referring to fig. 2 to 5, the present embodiment provides a soft package lithium ion battery, which includes a positive electrode tab 10, a negative electrode tab 10, a bare cell 20, and an aluminum-plastic film package body 30, where the positive electrode tab 10 is welded to the bare cell 20 to form a tab-bare cell welding portion 11, and a tab glue 12 is disposed on the positive electrode tab 10 to perform hot-press welding and packaging with the aluminum-plastic film package body 30 to form a tab-aluminum-plastic film packaging line.
Need explain, in the view, in order to see clearly naked electric core 20's structure appearance more directly perceivedly, do the interval setting between naked electric core 20 and the plastic-aluminum membrane packaging body 30, in the actual product, plastic-aluminum membrane packaging body 30 laminating in the outside of naked electric core 20.
The bare cell 20 includes a core main body 21 and a core main body addition part 22 connecting the core main body 21.
The aluminum-plastic film package 30 is provided with a core body punching hole 32 and a core body addition portion punching hole 33 which are matched with the shapes and positions of the core body 21 and the core body addition portion 22.
The core body addition part punching pit 33 is arranged in a gap structure 31 formed between the lug-naked cell welding part 11 and the lug-aluminum plastic film packaging line.
The soft package lithium ion battery that this embodiment provided has filled the position of void structure 31 because the setting of core main part interpolation portion 22 to the realization improves the volume of naked electric core 20 under the condition of same plastic-aluminum membrane packaging body 30 material quantity, thereby improves naked electric core 20's whole energy density.
Preferably, the distance between the upper surface of the core main body addition part 22 and the core main body 21 is not less than the distance between the upper surface of the tab-bare cell welding part 11 and the core main body 21. Because the aluminum-plastic film packaging body 30 is coated and attached on the outer sides of the bare cell 20 and the tab-bare cell welding part 11, three height relations exist between the tab-bare cell welding part 11 and the core main body adding part 22: the tab-bare cell welding part 11 is higher than the core main body adding part 22, so that the volume of an unused area is effectively reduced and the unused area still exists although the tab-bare cell welding part 11 is arranged; the tab-bare cell weld 11 is as high as the core body addition part 22, in which case the void structure 31 is fully filled and there is no unused area; the tab-bare cell welding portion 11 is lower than the core main body addition portion 22, and can be filled with the aluminum plastic film package 30, and in this case, the aluminum plastic film package 30 has substantially no unused area. Therefore, the distance between the upper surface of the core main body addition part 22 and the core main body 21 is not less than the distance between the upper surface of the tab-bare cell welding part 11 and the core main body 21. This arrangement can maximize the utilization of the aluminum plastic film package 30.
In this embodiment, the bare cell 20 is a laminated cell or a wound cell. Naked electric core 20 includes positive plate, negative pole piece and barrier film, and positive plate, negative pole piece and barrier film are convoluteed or the coincide forms naked electric core 20. That is, either the laminated cell or the wound cell can be applied to this scheme. The scheme has strong applicability. The appearance that this scheme was only to naked electric core 20 last shaping carries out optimal design, and does not improve inner structure.
In this embodiment, the edges of the core main body adding portion 22 are all chamfer transition structures. The chamfer is transited, so as to avoid the situation that the aluminum plastic film packaging body 30 is broken by the interference of the sharp corner to the aluminum plastic film packaging body 30.
The chamfer radius is preferably 1.0-2.5mm in combination with the conventional dimensions of the core body addition 22. So as to further reduce the situation that the corner collides with the aluminum-plastic film package 30 to break the aluminum-plastic film package 30. One skilled in the art may further prefer the chamfer radius to be 1.5mm, 1.8mm, 2.0mm, etc.
The outer surface of the core body addition part 22 is formed in a slope structure.
The connection angle of the core main body adding part 22 on the outer surface is an obtuse angle, which is beneficial to reducing the wind direction broken by the connection angle when the aluminum plastic film packaging body 30 is pressed and attached on the core main body adding part 22.
Example 1
Referring to fig. 2, the positive and negative electrode tabs 10 are located on the same side, the core main body 21 is connected to the core main body addition part 22, and three core main body addition parts 22 are located in the middle and both sides of the positive and negative electrode tabs 10. The core body addition parts 22 at both sides are trapezoidal, and the outer surfaces thereof are of a slope structure. The central core main body addition portion 22 is square. The three core main body adding parts 22 are all chamfer transition structures, and the chamfer transition radius is 1.5 mm. The width of the tab-bare cell welding part 11 is 48mm, and the width of the tab-aluminum plastic film packaging line is 48 mm. The length of the core main body adding part 22 is 5.0-25.0mm, and the thickness is 2.0-20.0 mm.
Example 2
Referring to fig. 4, the positive and negative electrode tabs 10 are located on the same side, the core main body 21 is connected to the core main body addition part 22, and one core main body addition part 22 is located in the middle of the positive and negative electrode tabs 10. The core body addition parts 22 at both sides are square, and the outer surfaces thereof are of a slope structure. The core main body adding part 22 is of a chamfer transition structure, and the chamfer transition radius is 1.5 mm. The length of the core main body adding part 22 is 5.0-25.0mm, and the thickness is 2.0-20.0 mm.
Example 3
Referring to fig. 5, the positive and negative electrode tabs 10 are located on opposite sides, the core main body 21 is connected to the core main body adding portions 22, four core main body adding portions 22 are provided, and the core main body adding portions 22 are provided on both sides of the positive and negative electrode tabs 10. The core main body addition part 22 has a trapezoidal shape, and the outer surface thereof has a slope structure. The core main body adding part 22 is of a chamfer transition structure, and the chamfer transition radius is 1.5 mm. The length of the core main body adding part 22 is 5.0-25.0mm, and the thickness is 2.0-20.0 mm.
The embodiment also provides a battery pack product manufactured by combining the soft-package lithium ion battery, the soft-package lithium ion battery pack can be manufactured by adopting a battery pack forming technology in the prior art, and the battery pack product is applied to a power automobile to manufacture an electric automobile. Through adopting the technical scheme in this embodiment, can effectively improve the capacity of battery package, can effectively improve the capacity as power source battery package in the electric automobile promptly, accord with the design requirement to power source module small volume, high capacity in the electric automobile design.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. A soft package lithium ion battery comprises an aluminum plastic film packaging body and a naked battery cell packaged in the aluminum plastic film packaging body, and is characterized in that the naked battery cell comprises a core main body and a core main body adding part connected with the core main body; the aluminum-plastic film packaging body is provided with a core main body punching pit and a core main body adding part punching pit which are matched with the core main body and the shape and the position of the core main body adding part;
the punching pit of the core main body adding part is arranged in a gap structure formed between the lug-naked electric core welding part and the lug-aluminum plastic film packaging line.
2. The soft package lithium ion battery of claim 1, wherein the shape and structure of the added part of the core main body are square or trapezoid.
3. The soft-pack lithium ion battery of claim 1, wherein the edges of the addition portion of the core body are both chamfered transition structures.
4. The soft pack lithium ion battery of claim 3, wherein the radius of the chamfered transition structure is 1.0 mm to 2.5 mm.
5. The soft pack lithium ion battery according to claim 3, wherein an outer surface of the core main body addition part is formed in a slope structure.
6. The soft pack lithium ion battery of claim 1, wherein the length of the core body addition is 5.0-25.0mm and the thickness is 2.0-20.0 mm.
7. The soft package lithium ion battery of any one of claims 1 to 6, wherein the positive and negative electrode tabs of the soft package lithium ion battery are located on the same side, and the number of the punching pits in the addition part of the core main body is 1 to 3.
8. The soft-package lithium ion battery of any one of claims 1-6, wherein the positive and negative lugs of the soft-package lithium ion battery are located on opposite sides, and the number of the punching pits in the addition part of the core main body is 1-4.
9. A battery pack comprising a soft-packed lithium ion battery according to any one of claims 1 to 8.
10. An electric vehicle characterized by comprising the battery pack according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922326935.XU CN210926193U (en) | 2019-12-20 | 2019-12-20 | Soft packet of lithium ion battery, battery package and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922326935.XU CN210926193U (en) | 2019-12-20 | 2019-12-20 | Soft packet of lithium ion battery, battery package and electric automobile |
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| CN210926193U true CN210926193U (en) | 2020-07-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112635923A (en) * | 2020-12-29 | 2021-04-09 | 远景动力技术(江苏)有限公司 | Battery core tab structure and battery |
| CN114094245A (en) * | 2020-07-21 | 2022-02-25 | 恒大新能源技术(深圳)有限公司 | Soft package lithium battery and preparation method thereof |
| CN114497695A (en) * | 2022-01-12 | 2022-05-13 | 广州小鹏汽车科技有限公司 | Soft packet of lithium cell and electric automobile |
-
2019
- 2019-12-20 CN CN201922326935.XU patent/CN210926193U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114094245A (en) * | 2020-07-21 | 2022-02-25 | 恒大新能源技术(深圳)有限公司 | Soft package lithium battery and preparation method thereof |
| CN112635923A (en) * | 2020-12-29 | 2021-04-09 | 远景动力技术(江苏)有限公司 | Battery core tab structure and battery |
| CN114497695A (en) * | 2022-01-12 | 2022-05-13 | 广州小鹏汽车科技有限公司 | Soft packet of lithium cell and electric automobile |
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