CN216529107U - Laminate polymer membrane material, laminate polymer battery shell and laminate polymer battery - Google Patents
Laminate polymer membrane material, laminate polymer battery shell and laminate polymer battery Download PDFInfo
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- CN216529107U CN216529107U CN202122872566.1U CN202122872566U CN216529107U CN 216529107 U CN216529107 U CN 216529107U CN 202122872566 U CN202122872566 U CN 202122872566U CN 216529107 U CN216529107 U CN 216529107U
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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 application relates to a soft packaging film material, a soft packaging battery shell and a soft packaging battery, wherein the soft packaging film material is provided with a first pit and a second pit which are sunken towards the same direction, and the first pit and the second pit are arranged side by side and are intersected on a first straight line; the depth of the first pit gradually increases towards the direction departing from the second pit, and the depth of the second pit gradually decreases towards the direction departing from the first pit; and the flexible packaging film material is turned over along the first straight line, and the inner cavity of the first pit and the inner cavity of the second pit are suitable for butt joint to form a cavity matched with the pole core shape of the flexible packaging battery. The utility model provides a laminate polymer material and laminate polymer battery shell, first pit directly docks with the second pit, need not reserve the distance of bending. For the soft packet of lithium cell's of current two hole structures shell, the laminate polymer material of equidimension makes after the soft packet of battery shell of this application, the thickness of the cavity that first pit and second pit butt joint constitute is great, and the thickness of the utmost point core that can hold is great.
Description
Technical Field
The application belongs to the technical field of laminate polymer battery, a laminate polymer film material, laminate polymer battery shell and laminate polymer battery are related to.
Background
The soft packet of lithium cell that has now is mostly planar lithium cell, and soft packet of lithium cell housing's the back is the plane, and the top side and the top surface parallel and level at soft packet of lithium cell housing's the back. Like this, when the back top at soft packet of lithium cell shell gummed paper or other components of adhesion (for example PCB board), can increase soft packet of lithium cell's whole thickness, lead to soft packet of lithium cell's volume increase.
Moreover, the conventional soft package lithium battery case (formed by bending an aluminum plastic film or a steel plastic film) is generally of a double-pit structure, that is, square pits with the same depth are arranged on both sides of the case in the thickness direction, and the pole core is accommodated in the two square pits. However, when the aluminum plastic film or the steel plastic film is bent, a bending distance needs to be reserved between the two square pits, so that after the aluminum plastic film or the steel plastic film is bent, the spacing area between the two square pits occupies the depth space of the two pits. For the soft packet of lithium cell's of single pit structure shell (being a soft packet of lithium cell's a certain side of the thickness direction of shell sets up square pit), the membrane is moulded to the aluminium-plastic membrane or steel of equidimension, after bending into soft packet of lithium cell's shell, the thickness of the square space that two square pit docks and constitute is less, and the thickness of the utmost point core that can hold is less. Therefore, the energy density of the soft package lithium battery with the double-pit structure is lower than that of the soft package lithium battery with the single-pit structure in the aluminum plastic film or the steel plastic film with the same size.
Disclosure of Invention
The technical problem that this application will solve is: to the current soft packet of lithium cell's that adopts two square pits of the same degree of depth shell, the plastic-aluminum membrane of equidimension, after bending into soft packet of lithium cell's shell, the thickness of the square space that two square pits butt joint constitute is less, the less problem of thickness of the utmost point core that can hold provides a soft packet of membrane material, soft packet of battery shell and soft packet of battery.
In order to solve the technical problem, on one hand, the application provides a soft packaging film material, wherein the soft packaging film material is provided with a first pit and a second pit which are sunken towards the same direction, and the first pit and the second pit are arranged side by side and intersect on a first straight line;
the depth of the first pit gradually increases towards the direction departing from the second pit, and the depth of the second pit gradually decreases towards the direction departing from the first pit; and the flexible packaging film material is turned over along the first straight line, and the inner cavity of the first pit and the inner cavity of the second pit are suitable for butt joint to form a cavity matched with the pole core shape of the flexible packaging battery.
Optionally, the soft film-wrapping material has a peripheral film region surrounding the first pit and the second pit, the peripheral film region includes a first film region, a second film region, a third film region and a fourth film region which are sequentially connected, the first film region is located at a lower side of the first pit, the third film region is located at an upper side of the second pit, the second film region is located at a left side of the first pit and the second pit, and the fourth film region is located at a right side of the first pit and the second pit;
the edge first straight line turns over a book soft packet of membrane material, first membrane district is suitable for the synthetic top banding with the third membrane district, the second membrane district is suitable for through the fifty percent discount coincide, cut and form first side banding, the fourth membrane district is suitable for through the fifty percent discount coincide, cut and form second side banding.
Optionally, openings of the first concave pit and the second concave pit are rectangular, and long sides of the openings of the first concave pit and the second concave pit are perpendicular to the first straight line.
Optionally, the depth of the first pit gradually increases from 0 to the direction away from the second pit.
Optionally, the soft packaging film material is turned over along the first straight line, and in a state that an inner cavity of the first pit is in butt joint with an inner cavity of the second pit to form a cavity, distances of the bottom of the first pit and the bottom of the second pit in the depth direction are kept consistent.
On the other hand, this application embodiment provides a laminate polymer battery shell, includes to the sunken first pit and the second pit of opposite direction, first pit is by bottom side to top side degree of depth grow gradually, the second pit is by bottom side to top side degree of depth reduce gradually, the cavity that the inner chamber of first pit and the inner chamber butt joint of second pit form and laminate polymer battery's utmost point core shape match.
Optionally, the pitch of the bottom of the first pit and the pitch of the bottom of the second pit are uniform throughout the thickness direction.
Optionally, a first film region is connected to the top of the first pit, a third film region is connected to the top of the second pit, and the first film region and the third film region are overlapped to form a top edge seal;
the top wall of the first pit protrudes out of the top seal edge in a direction departing from the second pit, and a first preset distance is reserved between the top wall of the first pit and the top surface of the top seal edge so as to form a first step surface between the top wall of the first pit and the top surface of the top seal edge;
the top wall of the second pit protrudes out of the top seal edge in the direction departing from the first pit, and a second preset distance is reserved between the top wall of the second pit and the top surface of the top seal edge so as to form a second step surface between the top wall of the second pit and the top surface of the top seal edge.
Optionally, a bottom side depth of the first pit is 0.
According to the utility model provides a laminate polymer battery shell, including the sunken first pit and the second pit to opposite direction, first pit is by the bottom side to the top side degree of depth grow gradually, the second pit is by the bottom side to the top side degree of depth reduce gradually, the cavity that the inner chamber of first pit and the inner chamber butt joint of second pit form and laminate polymer battery's utmost point core shape match. The utility model provides a laminate polymer material and laminate polymer battery shell, first pit directly docks with the second pit, need not reserve the distance of bending. For the soft packet of lithium cell's of current two hole structures shell, the laminate polymer material of equidimension makes after the soft packet of battery shell of this application, the thickness of the cavity that first pit and second pit butt joint constitute is great, and the thickness of the utmost point core that can hold is great. Therefore, the laminate polymer film material of the same size, the laminate polymer battery who has laminate polymer battery shell of this application is for the laminate polymer battery cell of traditional two hole structures, and battery energy density is higher.
On the other hand, this application embodiment still provides a laminate polymer battery, including utmost point core, anodal ear, negative pole ear and foretell laminate polymer battery shell, the utmost point core sets up in the cavity of the inner chamber of first pit and the inner butt joint formation of second pit, the inner of anodal ear and negative pole ear is connected with the utmost point core respectively, stretch out the outer end of anodal ear and the outer end of negative pole ear laminate polymer battery shell.
The embodiment of the application provides a laminate polymer battery has possessed above-mentioned laminate polymer battery shell's all advantages.
Drawings
Fig. 1 is a perspective view of a pouch battery provided in an embodiment of the present application;
fig. 2 is a front view (facing a second pit) of a pouch cell provided by an embodiment of the present application;
fig. 3 is a side view of a pouch battery provided in an embodiment of the present application;
FIG. 4 is a front view of a flexible packaging film provided by an embodiment of the present application;
fig. 5 is a left side view of a soft packaging film provided by an embodiment of the present application.
The reference numerals in the specification are as follows:
10. a soft-packaged battery housing; 1. a first pit; 11. a top wall of the first recess; 2. a second pit; 21. a top wall of the second pocket; 22. a bottom wall of the second recess; 3. a peripheral membrane region; 3a, a first membrane region; 3b, a second membrane region; 3c, a third membrane region; 3d, a fourth membrane region; 4. top edge sealing; 41. a top surface of the top seal edge; 5. a first step surface; 6. a second step surface; 7. sealing the first side; 8. sealing the edge at the second side;
20. a positive tab; 30. and a negative tab.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clear and obvious, the present application 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 merely illustrative of the present application and are not intended to limit the present application.
The orientation of the pouch battery case 10 is described with reference to fig. 2. The top and bottom in fig. 2 are top and bottom in this text, respectively. The left and right sides in fig. 2 are the first and second sides, respectively, hereinafter. Herein, inner and outer are relative to pouch cell housing 10, the outward direction of pouch cell housing 10 is the outer side, and the direction of pouch cell housing 10 towards its geometric center is the inner side. The orientation of the soft pack mold is described with reference to fig. 4.
Referring to fig. 1 to 3, the pouch battery provided in the embodiments of the present application includes a pole core (not shown in the drawings), a positive electrode tab 20, a negative electrode tab 30, and a pouch battery case 10.
Laminate polymer battery shell 10 includes to the sunken first pit 1 of opposite direction and second pit 2, first pit 1 is crescent to top side degree of depth by the bottom side gradually, second pit 2 is reduced to top side degree of depth by the bottom side gradually, the cavity that forms and laminate polymer battery's utmost point core shape matching is docked with the inner chamber of second pit 2 to the inner chamber of first pit 1.
The pole piece sets up in the cavity that the inner chamber of first pit 1 and the inner chamber butt joint of second pit 2 formed, the inner of anodal ear 20 and the inner of negative pole ear 30 are connected with the pole piece respectively, the outer end of anodal ear 20 and the outer end of negative pole ear 30 stretch out laminate polymer battery case 10. For example, the outer end of the positive tab 20 and the outer end of the negative tab 30 extend from the top of the pouch cell housing 10.
In one embodiment, the distance between the bottom of the first concave pit 1 and the bottom of the second concave pit 2 in the thickness direction is consistent. In this way, the distances from both sides of the pole core in the thickness direction to the bottom of the first recess 1 and the bottom of the second recess 2 are the same, and the internal space of the pouch battery case 10 can be maximally utilized. In this embodiment, the pouch battery case 10 is applied to a square battery.
In an embodiment, a first film region 3a is connected to a top of the first pit 1, a third film region 3c is connected to a top of the second pit 2, and the first film region 3a and the third film region 3c are overlapped (hot-pressed) to form a top sealing edge 4. The top wall 11 of the first pit 1 protrudes from the top surface 41 of the top seal edge 4 in a direction away from the second pit 2, and the top wall 11 of the first pit 1 and the top surface 41 of the top seal edge 4 are separated by a first preset distance, so that a first step surface 5 is formed between the top wall 11 of the first pit 1 and the top surface 41 of the top seal edge 4 (after the first film region 3a and the third film region 3c are overlapped, a side surface of the first film region 3a away from the third film region 3c is the first step surface 5); the top wall 21 of the second concave pit 2 protrudes from the top surface 41 of the top seal edge 4 in a direction away from the first concave pit 1, and the top wall 21 of the second concave pit 2 and the top surface 41 of the top seal edge 4 are separated by a second preset distance, so as to form a second step surface 6 between the top wall 21 of the second concave pit 2 and the top surface 41 of the top seal edge 4 (after the first film region 3a and the third film region 3c are overlapped, a side surface of the third film region 3c departing from the first film region 3a is the second step surface 6).
The first step surface 5 can be used for adhering protective gummed paper or other components, and the protective gummed paper or other components do not protrude out of the bottom of the first pit 1, so that the overall thickness of the soft package battery is not affected.
Other components, such as circuit boards, may be placed at the second step surface 6. Thus, the whole soft package battery is more compact.
In one embodiment, the depth of the bottom side of the first recess 1 is 0. Thus, the processing of the first dimples 1 is simpler.
In an embodiment, the first side of the first concave pit 1 and the second concave pit 2 are bonded by hot pressing to form a first side sealing edge, and the first side sealing edge is bent towards the first concave pit 1 and the second concave pit 2 to form a first side sealing edge 7. And the second side of the first pit 1 and the second side of the second pit 2 are subjected to hot-pressing adhesion to form a second side sealing edge, and the second side sealing edge is bent towards the first pit 1 and the second pit 2 to form a second side sealing edge 8. The side seal of the soft package battery is realized by the first side seal edge 7 and the second side seal edge 8.
In one embodiment, the pouch battery case 10 is formed by the flexible packaging film shown in fig. 3 being turned over along the first straight line L1, the flexible packaging film is provided with the first pit 1 and the second pit 2 (which are not turned over) which are sunken in the same direction, and the first pit 1 and the second pit 2 are arranged side by side and intersect at the first straight line L1.
The depth of the first pit 1 is gradually increased in the direction away from the second pit 2, and the depth of the second pit 2 is gradually decreased in the direction away from the first pit 1; the soft packaging film material is turned over along the first straight line L1, and the inner cavity of the first pit 1 and the inner cavity of the second pit 2 are suitable for being butted to form a cavity matched with the pole core shape of the soft packaging battery. The folding line is a first straight line L1, the folding line does not need to be folded for many times, and the process for manufacturing the soft package battery shell 10 by using the soft package film material is simple.
Referring to fig. 4, the soft package film material has a peripheral film region surrounding the first pit 1 and the second pit 2, the peripheral film region includes a first film region 3a, a second film region 3b, a third film region 3c and a fourth film region 3d which are sequentially connected, the first film region 3a is located at the lower side of the first pit 1, the third film region 3c is located at the upper side of the second pit 2, the second film region 3b is located at the left side of the first pit 1 and the second pit 2, and the fourth film region 3d is located at the right side of the first pit 1 and the second pit 2; follow first straight line L1 turns over the book soft packet of membrane material, first membrane district 3a is suitable for the synthetic top banding 4 of foldout with third membrane district 3c, second membrane district 3b is suitable for through the fifty percent discount coincide, cut and form first side banding 7, fourth membrane district 3d is suitable for through the fifty percent discount coincide, cut and form second side banding 8. The forming process of the first side edge sealing 7 and the second side edge sealing 8 is simple.
In one embodiment, the opening of the first recess 1 and the opening of the second recess 2 have the same shape and size. The first pit 1 and the second pit 2 are completely butted without a gap, so that the cavity formed by the first pit 1 and the second pit 2 is used for accommodating the pole core, and no space is wasted.
In one embodiment, the openings of the first concave pit 1 and the second concave pit 2 are rectangular, and the long sides of the openings of the first concave pit 1 and the second concave pit 2 are perpendicular to the first straight line L1. The rectangular first pit 1 and the rectangular second pit 2 are easy to process, and a cavity formed by butting the rectangular first pit 1 and the rectangular second pit 2 is suitable for a square battery cell and cannot waste space. That is, in this example, the laminate film was used to fabricate a prismatic battery.
According to the utility model provides a laminate polymer battery shell, including the sunken first pit and the second pit to opposite direction, first pit is by the bottom side to the top side degree of depth grow gradually, the second pit is by the bottom side to the top side degree of depth reduce gradually, the cavity that the inner chamber of first pit and the inner chamber butt joint of second pit form and laminate polymer battery's utmost point core shape match. The utility model provides a laminate polymer material and laminate polymer battery shell, first pit directly docks with the second pit, need not reserve the distance of bending. For the soft packet of lithium cell's of current two hole structures shell, the laminate polymer material of equidimension makes after the soft packet of battery shell of this application, the thickness of the cavity that first pit and second pit butt joint constitute is great, and the thickness of the utmost point core that can hold is great. Therefore, the laminate polymer film material of the same size, the laminate polymer battery who has laminate polymer battery shell of this application is for the laminate polymer battery cell of traditional two hole structures, and battery energy density is higher.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. The soft packaging film material is characterized in that the soft packaging film material is provided with a first pit and a second pit which are sunken in the same direction, and the first pit and the second pit are arranged side by side and intersect on a first straight line;
the depth of the first pit gradually increases towards the direction departing from the second pit, and the depth of the second pit gradually decreases towards the direction departing from the first pit; and the flexible packaging film material is turned over along the first straight line, and the inner cavity of the first pit and the inner cavity of the second pit are suitable for butt joint to form a cavity matched with the pole core shape of the flexible packaging battery.
2. The flexible film laminate of claim 1, wherein the flexible film laminate has peripheral film regions surrounding the first and second wells, the peripheral film regions comprising a first film region, a second film region, a third film region and a fourth film region connected in sequence, the first film region being located on the lower side of the first well, the third film region being located on the upper side of the second well, the second film region being located on the left side of the first and second wells, and the fourth film region being located on the right side of the first and second wells;
the edge first straight line turns over a book soft packet of membrane material, first membrane district is suitable for the synthetic top banding with the third membrane district, the second membrane district is suitable for through the fifty percent discount coincide, cut and form first side banding, the fourth membrane district is suitable for through the fifty percent discount coincide, cut and form second side banding.
3. The laminate film according to claim 1, wherein the openings of the first and second recesses are rectangular, and the long sides of the openings of the first and second recesses are perpendicular to the first straight line.
4. The laminate according to claim 1, wherein the first dimples are formed to have a depth gradually increasing from 0 in a direction away from the second dimples.
5. The flexible packaging film according to claim 1, wherein the flexible packaging film is folded along the first straight line, and the pitch of the bottom of the first dimple and the pitch of the bottom of the second dimple in the depth direction are uniform in a state where the cavity of the first dimple and the cavity of the second dimple are butted to form a cavity.
6. The utility model provides a laminate polymer battery shell which characterized in that, includes first pit and the second pit sunken to opposite direction, first pit is by bottom side to top side degree of depth grow gradually, the second pit is by bottom side to top side degree of depth reduce gradually, the cavity of the inner chamber of first pit and the butt joint of the inner chamber of second pit form with laminate polymer battery's utmost point core shape matching's cavity.
7. The pouch battery case according to claim 6, wherein the pitch of the first concave pit and the pitch of the second concave pit are uniform.
8. The pouch cell housing of claim 6, wherein a first membrane region is attached to the top of the first pocket, a third membrane region is attached to the top of the second pocket, and the first membrane region and the third membrane region are overlapped to form a top seal edge;
the top wall of the first pit protrudes out of the top seal edge in a direction departing from the second pit, and a first preset distance is reserved between the top wall of the first pit and the top surface of the top seal edge so as to form a first step surface between the top wall of the first pit and the top surface of the top seal edge;
the top wall of the second pit protrudes out of the top seal edge in the direction departing from the first pit, and a second preset distance is reserved between the top wall of the second pit and the top surface of the top seal edge so as to form a second step surface between the top wall of the second pit and the top surface of the top seal edge.
9. The pouch cell housing of claim 6 wherein the bottom side depth of the first depression is 0.
10. The utility model provides a laminate polymer battery, its characterized in that, includes utmost point core, anodal ear, negative pole ear and claim 6-9 any one the laminate polymer battery shell, utmost point core sets up in the cavity that the inner chamber of first pit and the inner butt joint of second pit formed, the inner of anodal ear and the inner of negative pole ear are connected with utmost point core respectively, the outer end of anodal ear and the outer end of negative pole ear stretch out laminate polymer battery shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122872566.1U CN216529107U (en) | 2021-11-22 | 2021-11-22 | Laminate polymer membrane material, laminate polymer battery shell and laminate polymer battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122872566.1U CN216529107U (en) | 2021-11-22 | 2021-11-22 | Laminate polymer membrane material, laminate polymer battery shell and laminate polymer battery |
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| Publication Number | Publication Date |
|---|---|
| CN216529107U true CN216529107U (en) | 2022-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122872566.1U Active CN216529107U (en) | 2021-11-22 | 2021-11-22 | Laminate polymer membrane material, laminate polymer battery shell and laminate polymer battery |
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| CN (1) | CN216529107U (en) |
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2021
- 2021-11-22 CN CN202122872566.1U patent/CN216529107U/en active Active
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