CN219979772U

CN219979772U - Full-tab battery structure with high polymer base material

Info

Publication number: CN219979772U
Application number: CN202320694034.XU
Authority: CN
Inventors: 许国诚; 郭嘉扬; 苏建豪; 林照得; 罗经坤; 傅伟凯; 杜云盟
Original assignee: Juhe New Materials Co ltd
Current assignee: Juhe New Materials Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-11-07
Anticipated expiration: 2033-03-31

Abstract

The utility model relates to a full-tab battery structure with a polymer base material, which comprises an insulating polymer base material, a positive plate, a negative plate and a separation film. The high polymer substrate is provided with two symmetrically arranged winding edges, a first side edge and a second side edge, and the first side edge and the second side edge are connected with the two winding edges and are relatively far away from each other; the positive plate is arranged on one side of the polymer substrate and is not contacted with the second side edge to form a first hollow area; the negative plate is arranged on the other side of the high polymer substrate and is not contacted with the first side edge to form a second hollow area; the isolating film is wound together with the polymer base material, the positive plate and the negative plate to form the battery structure with all lugs. The utility model can effectively reduce unnecessary loss of power in the transmission process by the structure, and further increase the service efficiency of the battery.

Description

Full-tab battery structure with high polymer base material

Technical Field

The present utility model relates to a full tab battery structure, and more particularly to a full tab battery structure with a polymer substrate.

Background

In recent years, the electric vehicle industry rapidly rises, and further, the development of electric vehicle related industries is driven, and the development of batteries is particularly important for electric vehicles. Furthermore, the battery is not only a power source of the electric vehicle, but also occupies a relatively high manufacturing cost, so that a good battery performance and a low manufacturing cost are likely to be a major point of development of the electric vehicle industry.

In addition, the development of the electronic product industry is rapidly advancing, wherein the electronic product is mostly provided with a battery to supply the power required by the electronic product, and in order to shorten the charging time of the battery during outgoing use, the industry is actively developing related technologies for improving the charging efficiency.

The conventional battery is provided with a tab to transmit power to the inside of the battery or to lead out power from the inside of the battery, however, the general battery structure is formed by winding a long sheet, and the tab is arranged at one side of the long sheet, so that the conduction path of current in the battery is quite long, the resistance value of the battery is increased in a phase-changing manner, namely, extra loss is generated, the charging time is increased, and the service efficiency of the battery is low. Therefore, solving the above-mentioned problems is a major problem in the art.

Disclosure of Invention

In order to solve the above problems, the present utility model provides a full tab battery structure with a polymer substrate, which improves the problems of power loss and poor charging efficiency of the conventional battery.

The utility model provides a full-tab battery structure with a polymer base material, which comprises an insulating polymer base material, a positive plate, a negative plate and a separation film. The insulating polymer substrate is of a sheet structure and is provided with two symmetrically arranged winding edges, a first side edge and a second side edge, wherein the first side edge and the second side edge are connected with the two winding edges and are relatively far away from each other. The positive plate is arranged on the side surface of the polymer substrate and connected to the first side edge to form a first tab area and a positive electrode area, the first tab area is connected to the first side edge, and the positive plate and the second side edge are provided with a first interval to form a first hollow area. The negative electrode plate is arranged on the side surface of the polymer substrate and connected to the second side edge to form a second lug area and a negative electrode area, the second lug area is connected to the second side edge, and the negative electrode plate and the first side edge are provided with a second interval to form a second hollow area. The isolating film is arranged on one side of the positive electrode plate or the negative electrode plate far away from the polymer base material and is wound together with the polymer base material, the positive electrode plate and the negative electrode plate.

In a preferred embodiment of the present utility model, the positive electrode sheet has a first metal layer and an active material layer, wherein the first metal layer is adjacent to the polymer substrate, and the active material layer is disposed on a side of the first metal layer away from the polymer substrate; the first metal layer covers the positive electrode region and the first tab region, and the active material layer only covers the positive electrode region.

In a preferred embodiment of the present utility model, the negative electrode plate has a second metal layer and a conductive layer, wherein the second metal layer is adjacent to the polymer substrate, and the conductive layer is disposed on a side of the second metal layer away from the polymer substrate; the second metal layer covers the negative electrode region and the second electrode ear region, and the active material layer only covers the negative electrode region.

In a preferred embodiment of the present utility model, the first tab area and the second tab area are cut at intervals respectively to form a plurality of first tabs and a plurality of second tabs.

In a preferred embodiment of the present utility model, one side of the separator protrudes toward the second side, and the separator and the negative electrode region form a third interval, and the distance of the third interval is between 1 mm and 6 mm; and one side of the isolating film protrudes towards the first side, the isolating film and the negative electrode region form a fourth interval, and the distance of the fourth interval is between 1 mm and 6 mm.

In a preferred embodiment of the present utility model, the thickness of the active material layer is between 50 microns and 180 microns, and the thickness of the first metal layer is between 3 microns and 25 microns.

In a preferred embodiment of the present utility model, the polymeric substrate has a thickness of between 1 micron and 10 microns.

In a preferred embodiment of the present utility model, the second metal layer has a thickness of between 1 micron and 4 microns, and the conductive layer has a thickness of between 50 microns and 166 microns.

Therefore, the positive electrode plate and the negative electrode plate can be rapidly and effectively formed at specific positions of the polymer substrate through the material characteristics of the polymer substrate to form the corresponding first hollowed-out area, the first lug area, the second hollowed-out area and the second lug area, and further, after being wound by matching with the isolating film, the battery framework of the full lug is formed, unnecessary power loss during charging and discharging is avoided, and the service efficiency of the battery is increased.

Drawings

Fig. 1 is a schematic front view showing the structure of a full tab battery according to a preferred embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of a full tab battery according to a preferred embodiment of the present utility model.

Fig. 3 is a winding schematic view of a full tab battery structure according to a preferred embodiment of the present utility model.

Fig. 4 is a schematic cross-sectional view of a full tab battery according to another preferred embodiment of the present utility model.

Fig. 5 is a flow chart illustrating a method for manufacturing a full tab battery structure according to a preferred embodiment of the utility model.

Detailed Description

For the convenience of explanation of the central idea of the present utility model represented in the above new content column, it will be expressed in terms of specific embodiments. Various objects in the embodiments are drawn to scale, size, deformation or displacement as appropriate for the description, and not to scale for the actual components, as previously described.

Exemplary embodiments of the present utility model are described in detail below with reference to the accompanying drawings and are not intended to limit the technical principles of the present utility model to the specifically disclosed embodiments, but the scope of the present utility model is limited only by the claims, covering alternatives, modifications, and equivalents.

Referring to fig. 1 to 4, in a preferred embodiment of the present utility model, a full tab battery structure 100 having a polymer substrate 10 is provided, which comprises an insulating polymer substrate 10, a positive electrode sheet 20, a negative electrode sheet 30 and a separator 40.

In the preferred embodiment of the present utility model, the polymeric substrate 10 is a sheet structure and has two symmetrically disposed winding sides 11, a first side 12 and a second side 13, the first side 12 and the second side 13 are connected to the two winding sides 11 and are disposed relatively far from each other, the shape of the polymeric substrate 10 is not limited in the present utility model, and in the preferred embodiment of the present utility model, the polymeric substrate 10 may be a rectangular sheet structure.

In the preferred embodiment of the present utility model, the positive electrode tab 20 is disposed on the side surface of the polymeric substrate 10 and is connected to the first side 12 to form a first tab region 21 and a positive electrode region 22, as shown in fig. 2, wherein the first tab region 21 is connected to the first side 12. In the preferred embodiment of the present utility model, the positive electrode 20 does not contact the second side 13 and forms a first distance D1 with the second side 13, and in the preferred embodiment of the present utility model, the first distance D1 is between 1 mm and 10 mm, so that the portion of the positive electrode 20 not contacting the polymer substrate 10 forms the first hollow area 23. In addition, the positive electrode region 22 is located between the first tab region 21 and the first hollowed-out region 23.

In the preferred embodiment of the present utility model, the negative electrode sheet 30 is disposed on the side surface of the polymeric substrate 10 and is connected to the second side edge 13 to form a second ear region 31 and a negative electrode region 32, as shown in fig. 2, where the second ear region 31 is connected to the second side edge 13, and the negative electrode sheet 30 does not contact the first side edge 12 and forms a second distance D2 with the first side edge 12, and in the preferred embodiment of the present utility model, the second distance D2 is between 1 mm and 10 mm. The portion of the negative electrode sheet 30 not contacting the polymer substrate 10 forms a second hollowed-out area 33. The negative electrode region 32 is located between the second electrode region 31 and the second hollow region 33.

In the preferred embodiment of the present utility model, the separator 40 may be disposed on the side of the positive electrode sheet 20 away from the polymer substrate 10, and the separator 40 covers the same position as the positive electrode region 22, in another preferred embodiment of the present utility model, the separator 40 may be disposed on the side of the negative electrode sheet 30 away from the polymer substrate 10, and the separator 40 covers the same position as the negative electrode region 32, as shown in fig. 2, i.e. the separator 40 is disposed on the side of the negative electrode sheet 30, so the present utility model is not limited to the case where the separator 40 is disposed on the side of the positive electrode sheet 20 or the negative electrode sheet 30 away from the polymer substrate 10. The separator 40 can be wound together with the polymer substrate 10, the positive electrode sheet 20 and the negative electrode sheet 30.

In the preferred embodiment of the present utility model, the separator 40 may be wound in advance to form a core structure in the all-tab battery structure 100, and the polymer base material 10, the positive electrode sheet 20, and the negative electrode sheet 30 may be wound together. After the full-tab battery structure 100 is wound and formed, the separator 40 contacts the positive electrode sheet 20 and the negative electrode sheet 30, and the winding manner, the sequence and the form thereof are not limited in the present utility model, and the foregoing embodiment is only one of the winding manners of the full-tab battery structure 100, and the present utility model is not limited thereto. In a preferred embodiment of the present utility model, the full tab battery structure 100 may be wound in a cylindrical shape. In another preferred embodiment of the present utility model, one side of the separator 40 protrudes toward the second side 13, and the separator 40 and the negative electrode region 32 form a third distance D3, and the third distance D3 is between 1 mm and 6 mm, and in a preferred embodiment of the present utility model, the third distance D3 is 1 mm; in the preferred embodiment of the present utility model, the distance between the isolation film 40 and the negative electrode region 32 is 1 mm to 6 mm, and the distance between the isolation film 40 and the negative electrode region 32 is 1 mm, so that the alignment error when the isolation film 40 is wound around the polymer substrate 10, the positive electrode sheet 20 and the negative electrode sheet 30 together can be reduced, the positive electrode and the negative electrode can be effectively blocked, and the problem of short circuit between the positive electrode and the negative electrode due to contact can be avoided. It should be noted that, the third pitch D3 and the fourth pitch D4 in fig. 2 and fig. 4 are only schematic and do not represent actual scale. In still another preferred embodiment of the present utility model, the first tab region 21 and the second tab region 31 of the wound full tab battery structure 100 can be bent toward the central structure formed by the isolation film 40, and the full tab battery is formed by processing, so as to reduce the current transmission path.

Referring to fig. 2 in combination, in the preferred embodiment of the utility model, the positive electrode sheet 20 has a first metal layer 24 and an active material layer 25, the first metal layer 24 is adjacent to one side of the polymer substrate 10 and is connected to the first side 12, which forms a first distance D1 with the second side 13, and the active material layer 25 is disposed on one side of the first metal layer 24 away from the polymer substrate 10; the first metal layer 24 and the active material layer 25 are both covered on the first tab region 21 and the positive electrode region 22, but not covered on the first hollow region 23, i.e. the portion of the positive electrode sheet 20 not contacting the polymer substrate 10 forms the first hollow region 23.

Referring to fig. 2, in a preferred embodiment of the present utility model, the negative electrode sheet 30 has a second metal layer 34 and a conductive layer 35, wherein the second metal layer 34 is adjacent to one side of the polymer substrate 10 and connected to the second side 13, and forms a second distance D2 with the first side 12, and the conductive layer 35 is disposed on one side of the second metal layer 34 away from the polymer substrate 10; the second metal layer 34 and the active material layer 25 are both covered on the second tab region 31 and the negative electrode region 32, but not covered on the second hollow region 33, i.e. the portion of the negative electrode sheet 30 not contacting the polymer substrate 10 forms the second hollow region 33. It should be emphasized that the above description is not limited to the order of disposing the first metal layer 24, the active material layer 25, the second metal layer 34 and the conductive layer 35 on the polymer substrate 10, that is, the order of disposing is not absolute in the illustrated embodiment, and may be properly disposed according to the practical situation.

Referring to fig. 3, in the preferred embodiment of the present utility model, the first tab area 21 and the second tab area 31 are cut at intervals to form a plurality of first tabs 211 and a plurality of second tabs 311, so that the first tabs 211 and the second tabs 311 have independent flexibility, and can be properly bent and overlapped for contact after winding, thereby facilitating current conduction.

Referring to fig. 2 and 3, fig. 2 and 3 are schematic cross-sectional views of the structure of the present utility model, and are not actual scale of the full tab battery structure 100, as described earlier. In the preferred embodiment of the present utility model, the thickness of the polymeric substrate 10 is between 1 micron and 10 microns, and in the preferred embodiment of the present utility model, the polymeric substrate 10 can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10 microns, etc.

In the preferred embodiment of the present utility model, the thickness of the first metal layer 24 is between 3 microns and 25 microns, and in the preferred embodiment of the present utility model, the thickness of the first metal layer 24 can be 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25 microns, etc.

In the preferred embodiment of the present utility model, the thickness of the active material layer 25 is between 50 micrometers and 180 micrometers, and in the preferred embodiment of the present utility model, the thickness of the active material layer 25 may be 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 170, 175, 180 micrometers, etc.

In the preferred embodiment of the present utility model, the thickness of the second metal layer 34 is between 1 micron and 4 microns, and in the preferred embodiment of the present utility model, the thickness of the second metal layer 34 may be 1, 1.5, 2, 2.5, 3, 3.5, 4 microns, etc.

In preferred embodiments of the present utility model, the thickness of the conductive layer 35 is between 50 microns and 166 microns, and in preferred embodiments of the present utility model, the thickness of the conductive layer 35 can be 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 155, 160, 165, 166 microns, etc.

In the preferred embodiment of the present utility model, the thickness of the isolation film 40 is between 10 microns and 40 microns, and in the preferred embodiment of the present utility model, the thickness of the isolation film 40 may be 10, 15, 20, 25, 30, 35, 40 microns, etc.

In the preferred embodiment of the present utility model, the material of the polymer substrate 10 may be polyethylene or polypropylene, the material of the polymer substrate 10 is not limited in the present utility model, the material of the first metal layer 24 may be aluminum, the material of the first metal layer 24 is not limited in the present utility model, the material of the active material layer 25 is lithium, and in the preferred embodiment of the present utility model, the active material layer 25 may be made of lithium cobalt oxide, lithium manganate, lithium cobaltate, lithium nickelate, lithium iron phosphate, or the like, or a combination thereof, and the material of the active material layer 25 is not limited in the present utility model. The material of the second metal layer 34 may be copper or copper-nickel alloy, and the material of the second metal layer 34 is not limited in the present utility model. The material of the conductive layer 35 may be graphite, graphene, or other material, and the material of the conductive layer 35 is not limited in the present utility model.

In the preferred embodiment of the present utility model, the isolating membrane 40 has a plurality of micro-porous structures (not shown) for containing the electrolyte, and the electrolyte is made of a conductive material, and the electrolyte is not limited in the present utility model, so long as the purpose of electrolyte conductivity is achieved, for example: the electrolyte material can be lithium salt, organic carbonate solvent, methyl cyanide, dimethyl sulfoxide, propylene carbonate and other materials. In addition, the polymer substrate 10 according to the present utility model is made of an insulating material, and the polymer substrate 10 does not have the microporous structures, so that ions cannot be conducted through the polymer substrate 10 by the electrolyte.

Referring to fig. 4, in another preferred embodiment of the present utility model, the first metal layer 24 covers the first tab region 21 and the positive electrode region 22, and the active material layer 25 covers only the positive electrode region 22. Thus, the material usage of the active material layer 25 can be effectively reduced, and the manufacturing cost of the whole battery can be reduced.

Referring to fig. 4, in still another preferred embodiment of the present utility model, the second metal layer 34 covers the second tab region 31 and the cathode region 32, and the conductive layer 35 covers only the cathode region 32. Thus, the material usage of the conductive layer 35 can be effectively reduced, and the manufacturing cost of the whole battery can be reduced.

Referring to fig. 5, in another preferred embodiment of the present utility model, a method 200 for fabricating a full tab battery structure with a polymer substrate 10 is provided, which includes steps 210, 220, 230 and 240.

In step 210, an insulating polymer substrate 10 is provided, which is a sheet structure and has two symmetrically disposed winding sides 11, a first side 12 and a second side 13, wherein the first side 12 and the second side 13 are connected to the two winding sides 11 and are disposed relatively far from each other.

In step 220, the positive plate 20 is disposed on the side surface of the polymer substrate 10 and connected to the first side 12 to form a first tab region 21 and a positive electrode region 22, the first tab region 21 is connected to the first side 12, and the positive plate 20 and the second side 13 have a first distance D1 to form a first hollowed-out region 23.

In step 230, the negative electrode sheet 30 is disposed on the side surface of the polymer substrate 10 and connected to the second side 13 to form a second tab region 31 and a negative electrode region 32, wherein the second tab region 31 is connected to the second side 13, and the negative electrode sheet 30 and the first side 12 have a second distance D2 to form a second hollowed-out region 33.

In step 240, the separator 40 is provided on the side of the positive electrode sheet 20 or the negative electrode sheet 30 away from the polymer base material 10, and is wound together with the polymer base material 10, the positive electrode sheet 20, and the negative electrode sheet 30. It should be emphasized that steps 210, 220, 230 and 240 in this embodiment are merely one example of the present utility model, and are not meant to represent the actual manufacturing order.

In the preferred embodiment of the present utility model, the positive electrode sheet 20 may be disposed on the side surface of the polymer substrate 10, and then the negative electrode sheet 30 may be disposed on the side surface of the polymer substrate 10 away from the positive electrode sheet 20. In another preferred embodiment of the present utility model, the negative electrode sheet 30 may be disposed on the side surface of the polymer substrate 10, and then the positive electrode sheet 20 may be disposed on the side surface of the polymer substrate 10 away from the negative electrode sheet 30. In another preferred embodiment of the present utility model, the positive electrode sheet 20 is prepared first, and thus, the above embodiment is not limited to the order of disposing the positive electrode sheet 20 and the negative electrode sheet 30 on the polymer substrate 10, but the separator 40 may be disposed on the side of the positive electrode sheet 20 or the negative electrode sheet 30 away from the polymer substrate 10, depending on the actual disposition.

In the preferred embodiment of step 220, the positive electrode sheet 20 has a first metal layer 24 and an active material layer 25, wherein the first metal layer 24 is adjacent to one side of the polymeric substrate 10, and the active material layer 25 is disposed on one side of the first metal layer 24 away from the polymeric substrate 10; the first metal layer 24 and the active material layer 25 are both covered at the same positions as the first tab region 21 and the positive electrode region 22. Here, the materials and thicknesses of the polymer substrate 10, the first metal layer 24 and the active material layer 25 are as described above, and will not be described again.

In the preferred embodiment of step 230, the negative electrode sheet 30 has a second metal layer 34 and a conductive layer 35, wherein the second metal layer 34 is adjacent to one side of the polymeric substrate 10, and the conductive layer 35 is disposed on one side of the second metal layer 34 away from the polymeric substrate 10; the second metal layer 34 and the active material layer 25 are both covered at the same positions as the second tab region 31 and the negative electrode region 32. The materials and thicknesses of the second metal layer 34 and the conductive layer 35 are as described above, and will not be repeated here.

In the preferred embodiment of step 220, the first metal layer 24 is adjacent to a side of the polymeric substrate 10, and the active material layer 25 is disposed on a side of the first metal layer 24 away from the polymeric substrate 10; the first metal layer 24 covers the first tab region 21 and the positive electrode region 22, and the active material layer 25 covers only the positive electrode region 22.

In the preferred embodiment of step 230, the second metal layer 34 is adjacent to a side of the polymeric substrate 10, and the conductive layer 35 is disposed on a side of the second metal layer 34 away from the polymeric substrate 10; the second metal layer 34 covers the second electrode tab region 31 and the negative electrode region 32, and the conductive layer 35 covers only the negative electrode region 32.

In the following description, there is no absolute relationship between the formation of the first metal layer 24, the active material layer 25, the second metal layer 34, and the conductive layer 35. In a preferred embodiment of the present utility model, the polymer substrate 10 and the first metal layer 24 may be bonded, and then the active material layer 25 may be formed. In another preferred embodiment of the present utility model, the polymeric substrate 10 and the second metal layer 34 may be bonded first, and then the first metal layer 24 may be bonded to the side surface of the polymeric substrate 10 away from the second metal layer 34. The above-described processes are all possible manufacturing sequences. Therefore, the present utility model is not limited to the alignment and bonding sequence of the polymer substrate 10, the first metal layer 24 and the second metal layer 34, and the active material layer 25, the conductive layer 35 and the isolation film 40 may be aligned and formed according to the actual manufacturing situation.

In the preferred embodiment of the present utility model, the polymer substrate 10 may be bonded to the first metal layer 24 by pressing, and in the other preferred embodiment of the present utility model, the first metal layer 24 may be formed on the side surface of the polymer substrate 10 by physical vapor deposition. Therefore, the present utility model is not limited to the bonding order and bonding method of the first metal layer 24 on the polymer substrate 10 or the polymer substrate 10 on the first metal layer 24.

In the preferred embodiment of the present utility model, the second metal layer 34 is formed on the side surface of the polymer substrate 10 by electroplating, so that the second metal layer 34 is less likely to peel off from the surface of the polymer substrate 10. It should be noted that, assuming that the first metal layer 24 is disposed on the side surface of the polymer substrate 10, the second metal layer 34 is formed on the side surface of the polymer substrate 10 away from the first metal layer 24.

In the preferred embodiment of the present utility model, the first tab area 21 and the second tab area 31 are cut at intervals to form a plurality of first tabs 211 and a plurality of second tabs 311, respectively, so as to increase the charging branches of the current.

In summary, the present utility model can achieve the following technical effects:

1. through the arrangement of the first tab area 21 and the second tab area 31, the charging path of the current can be shortened, thereby reducing the power loss and shortening the charging time, and achieving the technical effect of improving the charging efficiency.

2. The first tab area 21 and the second tab area 31 are cut at intervals to form a plurality of first tabs 211 and a plurality of second tabs 311, so that the first tabs can be properly bent and overlapped to be contacted after being wound, and current conduction is more convenient.

3. The method of reserving the first hollow area 23 and the second hollow area 33 without arranging the positive plate 20 and the negative plate 30 in the polymer substrate 10 can avoid the problem that the positions of the first tab area 21 and the second tab area 31 need to be aligned when the full tab battery structure 100 is manufactured, reduce the difficulty degree in manufacturing, and improve the production yield.

4. The thickness of the insulating polymer substrate 10 is thinner, and the lamination arrangement of the positive electrode plate 20 and the negative electrode plate 30 is matched, so that more lamination or winding layers can be obtained under the same battery volume, more electricity storage structures can be further accommodated, and the electric quantity which can be stored by the battery is improved.

5. The first metal layer 24 and the second metal layer 34 can be formed on the polymer substrate 10 by a film plating method, so that the thickness of the laminated structure of the battery is further reduced, and the same volume of the battery can have more laminated or wound layers to accommodate more electricity storage structures, thereby further improving the amount of electricity that can be stored in the battery.

6. The second metal layer 34 is formed on the side surface of the polymer substrate 10 by electroplating, so that the second metal layer 34 is not easily peeled off from the polymer substrate 10.

7. The third distance D3 and the fourth distance D4 are formed between the separator 40 and the negative electrode region 32, so that the technical effect of reducing alignment errors during winding can be achieved, the positive electrode and the negative electrode can be effectively blocked, and the technical effect of preventing short circuits between the positive electrode and the negative electrode due to contact can be achieved.

The foregoing technical effects do not hinder the existence of other technical effects. Those skilled in the art will recognize that the utility model can be practiced with modification within the spirit and scope of the appended claims. Therefore, the technical effects of the present utility model are not limited to the technical effects listed above.

The above examples are only for illustrating the present utility model and are not intended to limit the scope of the present utility model. All modifications and variations which do not depart from the spirit of the utility model are intended to be within the scope of the utility model.

Reference numerals

100 full tab battery structure

10 Polymer substrate

11 winding edge

12 first side edge

13 second side edge

20 positive electrode plate

21 first tab region

211 first tab 22 positive electrode region

23 first hollowed-out area

24 first metal layer

25 active material layer

30 negative electrode sheet

31 second ear region

311 second pole ear

32 negative electrode region

33 second hollowed-out area

34 second metal layer

35 conductive layer

40 isolating film

200 manufacturing method of full-tab battery structure

210 step 220 step

230 step

240 step

D1 first distance

D2, second distance

D3, third interval

And D4, fourth interval.

Claims

1. The utility model provides a full utmost point ear battery structure with polymer substrate which characterized in that includes:

the insulation polymer substrate is of a sheet structure and is provided with two symmetrically arranged winding edges, a first side edge and a second side edge, and the first side edge and the second side edge are connected with the two winding edges and are relatively far away from each other;

the positive plate is arranged on the side surface of the polymer substrate and connected with the first side edge to form a first tab area and a positive electrode area, the first tab area is connected with the first side edge, and the positive plate and the second side edge have a first interval to form a first hollowed-out area;

the negative electrode plate is arranged on the side surface, far away from the positive electrode plate, of the polymer substrate and is connected with the second side edge to form a second lug area and a negative electrode area, the second lug area is connected with the second side edge, and the negative electrode plate and the first side edge have a second interval to form a second hollow area; and

and the isolating film is arranged on one side of the positive electrode plate or the negative electrode plate, which is far away from the polymer base material, and is wound together with the polymer base material, the positive electrode plate and the negative electrode plate.

2. The full-tab battery structure with a polymer substrate according to claim 1, wherein the positive electrode sheet has a first metal layer and an active material layer, the first metal layer is adjacent to the polymer substrate, and the active material layer is disposed on a side of the first metal layer away from the polymer substrate; the first metal layer covers the positive electrode region and the first tab region, and the active material layer only covers the positive electrode region.

3. The full tab battery structure with polymeric substrate according to claim 2, wherein the negative electrode sheet has a second metal layer and a conductive layer, the second metal layer is adjacent to the polymeric substrate, and the conductive layer is disposed on a side of the second metal layer away from the polymeric substrate; the second metal layer covers the negative electrode region and the second electrode ear region, and the active material layer only covers the negative electrode region.

4. The full tab battery structure with polymeric substrate according to claim 1, wherein the first tab region and the second tab region are cut at intervals to form a plurality of first tabs and a plurality of second tabs, respectively.

5. The full tab battery structure with polymeric substrate according to claim 1, wherein one side of the separator protrudes toward the second side, the separator and the negative electrode region form a third distance, and the distance of the third distance is between 1 mm and 6 mm; and one side of the isolating film protrudes towards the first side edge, the isolating film and the negative electrode region form a fourth interval, and the distance of the fourth interval is between 1 mm and 6 mm.

6. The full tab battery structure with polymeric substrate of claim 2, wherein the active material layer has a thickness between 50 microns and 180 microns and the first metal layer has a thickness between 3 microns and 25 microns.

7. The full tab battery structure with polymeric substrate of claim 1, wherein the polymeric substrate has a thickness between 1 micron and 10 microns.

8. The full tab battery structure with polymeric substrate of claim 3, wherein the second metal layer has a thickness between 1 micron and 4 microns and the conductive layer has a thickness between 50 microns and 166 microns.