CN220042213U - Positive electrode bipolar ear cell - Google Patents
Positive electrode bipolar ear cell Download PDFInfo
- Publication number
- CN220042213U CN220042213U CN202321115862.XU CN202321115862U CN220042213U CN 220042213 U CN220042213 U CN 220042213U CN 202321115862 U CN202321115862 U CN 202321115862U CN 220042213 U CN220042213 U CN 220042213U
- Authority
- CN
- China
- Prior art keywords
- bipolar
- aluminum
- positive
- positive electrode
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 76
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052802 copper Inorganic materials 0.000 claims abstract description 38
- 239000010949 copper Substances 0.000 claims abstract description 38
- 210000005069 ears Anatomy 0.000 claims 14
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a positive electrode bipolar ear cell, which comprises a positive plate and a negative plate; at least one group of bipolar lugs are formed on the positive plate, each bipolar lug comprises a first aluminum lug and a second aluminum lug, after the positive bipolar lug battery core is assembled, the first aluminum lugs of all the bipolar lugs are overlapped together, the second aluminum lugs of all the bipolar lugs are overlapped together, and all the first aluminum lugs are not overlapped with all the second aluminum lugs; at least one copper tab is formed on the negative plate, and after the positive electrode bipolar tab battery core is assembled, all copper tabs are overlapped together. The beneficial effects of the utility model are as follows: because bipolar lugs are formed on the positive plate, and monopolar lugs are formed on the negative plate, the conductivity of copper is close to the double of that of aluminum, and the bipolar lugs are adopted to balance the conductivity difference of the positive electrode and the negative electrode, and the thermal effect of the positive electrode and the negative electrode is basically consistent when the multiplying power is charged and discharged, so that the multiplying power performance and the safety performance of the battery cell are improved.
Description
Technical Field
The utility model relates to the technical field of battery cells, in particular to a positive electrode bipolar ear battery cell.
Background
The assembly of lithium ion batteries generally refers to the process of assembling components such as positive and negative plates, diaphragms, tabs, shells and the like into batteries. The assembly process can be generally divided into winding and lamination, assembly, welding and other procedures (such as China patent application No. CN202110608120. X). The winding and lamination are processes of manufacturing the square or cylindrical cell structure of the positive electrode-diaphragm-negative electrode structure by welding the positive electrode plate and the negative electrode plate with the lugs on the current collector and the diaphragm.
As shown in fig. 1, in the existing lamination process, the current collector of the positive electrode is aluminum foil and the tab is aluminum tab, and the current collector of the negative electrode is copper foil and the tab is copper tab; because the conductivity of aluminum is obviously lower than that of copper (the conductivity of aluminum is 60% IACS (20 ℃), and the conductivity of copper is 100% IACS (20 ℃), when the battery core is charged and discharged at multiplying power, the temperature of the positive electrode lug is higher, and the battery core becomes a bottleneck for influencing multiplying power performance and safety performance.
Disclosure of Invention
In view of the above, it is necessary to provide a positive electrode bipolar ear cell for solving the technical problems that the temperature of the positive electrode ear of the cell is higher due to low conductivity when the cell is charged and discharged at a multiplying power, and the multiplying power performance and the safety performance are affected.
In order to achieve the above purpose, the utility model provides a positive electrode bipolar ear cell, which comprises a positive plate and a negative plate;
at least one group of bipolar lugs are formed on the positive plate, each bipolar lug comprises a first aluminum lug and a second aluminum lug, after the positive bipolar lug battery core is assembled, the first aluminum lugs of the bipolar lugs are overlapped together, the second aluminum lugs of the bipolar lugs are overlapped together, and the first aluminum lugs and the second aluminum lugs of the bipolar lugs are not overlapped;
at least one copper tab is formed on the negative plate, and after the positive electrode bipolar tab battery core is assembled, all copper tabs are overlapped together.
In some embodiments, the positive electrode sheet and the negative electrode sheet are both one; the positive electrode bipolar ear cell further comprises a diaphragm, and the positive electrode plate, the diaphragm and the negative electrode plate are sequentially stacked and then wound to form the positive electrode bipolar ear cell.
In some embodiments, the number of the bipolar tabs formed on the positive plate is a plurality, and after the positive plate, the separator and the negative plate are wound, the first aluminum tabs of the bipolar tabs are overlapped together, the second aluminum tabs of the bipolar tabs are overlapped together, and the first aluminum tabs and the second aluminum tabs are not overlapped.
In some embodiments, the number of the copper tabs formed on the negative electrode sheet is a plurality, and when the positive electrode sheet, the separator and the negative electrode sheet are wound, the copper tabs are all overlapped together.
In some embodiments, each of the first aluminum tab and each of the second aluminum tab are welded to the positive plate.
In some embodiments, each copper tab is welded to the negative plate.
In some embodiments, the positive electrode sheet and the negative electrode sheet are all a plurality of; the positive electrode bipolar ear cell further comprises a plurality of diaphragms, and the positive electrode plate, the negative electrode plate and the diaphragms are sequentially stacked together according to the sequence of 'diaphragm/negative electrode plate/diaphragm/positive electrode plate'.
In some embodiments, the number of the bipolar tabs formed on each positive plate is one, and after each positive plate, each separator and each negative plate are laminated, the first aluminum tabs of each bipolar tab are overlapped together, the second aluminum tabs of each bipolar tab are overlapped together, and each first aluminum tab and each second aluminum tab are not overlapped.
In some embodiments, the number of the copper tabs formed on each negative electrode sheet is one, and when the positive electrode sheet, the separator and the negative electrode sheet are laminated, the copper tabs are overlapped together.
In some embodiments, the positive bipolar ear cell further comprises a housing, wherein the housing is coated outside the positive plate and the negative plate.
Compared with the prior art, the technical scheme provided by the utility model has the beneficial effects that: because bipolar lugs (comprising a first aluminum lug and a second aluminum lug) are formed on the positive plate, and unipolar lugs (namely copper lugs) are formed on the negative plate, the conductivity of copper is close to the double of the conductivity of aluminum, and the bipolar lugs are adopted to balance the conductivity difference of the positive electrode and the negative electrode, the thermal effect of the positive electrode and the negative electrode is basically consistent when the multiplying power is charged and discharged, so that the multiplying power performance and the safety performance of the battery cell are improved.
Drawings
FIG. 1 is a schematic diagram of a conventional cell structure;
fig. 2 is a schematic structural diagram of embodiment 1 of the positive bipolar ear cell provided by the present utility model;
fig. 3 is a schematic structural view of the positive and negative electrode tabs of the positive bipolar ear cell of fig. 2 after being unfolded;
fig. 4 is a schematic view of a winding of the positive bipolar ear cell of fig. 2;
fig. 5 is a schematic structural diagram of embodiment 2 of the positive bipolar ear cell provided by the present utility model;
fig. 6 is a schematic structural diagram of one positive plate and one negative plate of the positive bipolar ear cell of fig. 5;
fig. 7 is a schematic diagram of the lamination of the positive bipolar ear cell of fig. 5;
in the figure: 1-positive plate, 11-bipolar lug, 111-first aluminum lug, 112-second aluminum lug, 2-negative plate, 21-copper lug and 3-diaphragm.
Detailed Description
The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.
Example 1 (preparation of cells by winding Process)
Referring to fig. 2-4, embodiment 1 of the present utility model provides a positive bipolar ear cell, which includes a positive plate 1 and a negative plate 2.
The positive plate 1 is formed with at least one group of bipolar lugs 11, the bipolar lugs 11 comprise first aluminum lugs 111 and second aluminum lugs 112, after the positive bipolar lug battery core is assembled, the first aluminum lugs 111 of the bipolar lugs 11 are overlapped together, the second aluminum lugs 112 of the bipolar lugs 11 are overlapped together, and the first aluminum lugs 111 and the second aluminum lugs 112 are not overlapped.
At least one copper tab 21 is formed on the negative electrode plate 2, and after the positive electrode bipolar tab battery core is assembled, the copper tabs 21 are overlapped together. It should be understood that the dimensions of each second aluminum tab 112 and each copper tab 21 of each first aluminum tab 111 are equal.
In the utility model, since the bipolar lug 11 (comprising the first aluminum lug 111 and the second aluminum lug 112) is formed on the positive plate 1, and the monopolar lug (namely the copper lug 21) is formed on the negative plate 2, the conductivity of copper is close to 2 times of that of aluminum, and the bipolar lug positive electrode is adopted, the conductivity difference of the positive electrode and the negative electrode can be balanced, and the thermal effect of the positive electrode and the negative electrode is basically consistent when the multiplying power is charged and discharged, thereby improving the multiplying power performance and the safety performance of the battery core.
In order to specifically realize the manufacturing of the battery cell, referring to fig. 2 to fig. 4, in embodiment 1, the positive electrode sheet 1 and the negative electrode sheet 2 are both one; the positive electrode bipolar ear cell further comprises a diaphragm 3, and the positive electrode plate 1, the diaphragm 3 and the negative electrode plate 2 are sequentially stacked and then wound to form the positive electrode bipolar ear cell.
In order to specifically implement the function of the bipolar tab 11, please refer to fig. 2-4, in embodiment 1, the number of the bipolar tabs 11 formed on the positive electrode sheet 1 is several, when the positive electrode sheet 1, the separator 3 and the negative electrode sheet 2 are wound, the first aluminum tabs 111 of the bipolar tabs 11 are overlapped together, the second aluminum tabs 112 of the bipolar tabs 11 are overlapped together, and the first aluminum tabs 111 and the second aluminum tabs 112 are not overlapped (as shown in fig. 2 and 4).
In order to specifically implement the function of the copper tab 21, please refer to fig. 2-4, in embodiment 1, the number of the copper tabs 21 formed on the negative electrode sheet 2 is several, and when the positive electrode sheet 1, the separator 3 and the negative electrode sheet 2 are wound, the copper tabs 21 are all overlapped together (as shown in fig. 2 and 4).
In order to realize the mounting of the first aluminum tab 111 and the second aluminum tab 112, referring to fig. 2 to fig. 4, in a preferred embodiment, each of the first aluminum tab 111 and each of the second aluminum tabs 112 are welded to the positive plate 1.
In order to specifically implement the mounting of the copper tabs 21, referring to fig. 2 to 4, in a preferred embodiment, each copper tab 21 is welded to the negative electrode sheet 2.
Example 2 (fabrication of cells Using lamination Process)
Referring to fig. 5 to fig. 7, in embodiment 2, the number of the positive electrode sheets 1 and the number of the negative electrode sheets 2 are several; the positive electrode bipolar ear cell further comprises a plurality of diaphragms 3, wherein the positive electrode plate 1, the negative electrode plate 2 and the diaphragms 3 are sequentially laminated together according to the sequence of 'diaphragms/negative electrode plates/diaphragms/positive electrode plates'.
In order to specifically realize the functions of the first aluminum tab 111 and the second aluminum tab 112, please refer to fig. 5-7, in embodiment 2, the number of the bipolar tabs 11 formed on each positive electrode tab 1 is one, and after each positive electrode tab 1, each separator 3 and each negative electrode tab 2 are laminated, the first aluminum tabs 111 of each bipolar tab 11 are overlapped together, the second aluminum tabs 112 of each bipolar tab 11 are overlapped together, and each first aluminum tab 111 is not overlapped with each second aluminum tab 112.
In order to specifically realize the function of the copper tab 21, referring to fig. 5 to 7, in embodiment 2, the number of copper tabs 21 formed on each negative electrode sheet 2 is one, and after the positive electrode sheet 1, the separator 3 and the negative electrode sheet 2 are laminated, each copper tab 21 is overlapped.
In order to protect the battery cell, referring to fig. 5 to 7, in a preferred embodiment, the positive bipolar ear battery cell further includes a housing, and the housing is wrapped around the positive electrode sheet 1 and the negative electrode sheet 2.
For a better understanding of the present utility model, the following is a detailed description of the principles of the positive bipolar ear cell provided by the present utility model with reference to fig. 2-7: because the bipolar lug 11 (comprising the first aluminum lug 111 and the second aluminum lug 112) is formed on the positive plate 1, and the monopolar lug (namely the copper lug 21) is formed on the negative plate 2, the conductivity of copper is close to 2 times of that of aluminum, and the bipolar lug positive electrode is adopted, so that the conductivity difference of the positive electrode and the negative electrode can be balanced, and the thermal effect of the positive electrode and the negative electrode is basically consistent when the multiplying power is charged and discharged, thereby improving the multiplying power performance and the safety performance of the battery cell.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. The positive electrode bipolar lug battery cell is characterized by comprising a positive plate and a negative plate;
at least one group of bipolar lugs are formed on the positive plate, each bipolar lug comprises a first aluminum lug and a second aluminum lug, after the positive bipolar lug battery core is assembled, the first aluminum lugs of the bipolar lugs are overlapped together, the second aluminum lugs of the bipolar lugs are overlapped together, and the first aluminum lugs and the second aluminum lugs of the bipolar lugs are not overlapped;
at least one copper tab is formed on the negative plate, and after the positive electrode bipolar tab battery core is assembled, all copper tabs are overlapped together.
2. The positive bipolar ear cell of claim 1, wherein the positive plate and the negative plate are one;
the positive electrode bipolar ear cell further comprises a diaphragm, and the positive electrode plate, the diaphragm and the negative electrode plate are sequentially stacked and then wound to form the positive electrode bipolar ear cell.
3. The positive electrode bipolar ear cell according to claim 2, wherein the number of bipolar ears formed on the positive electrode sheet is a plurality, and when the positive electrode sheet, the separator and the negative electrode sheet are wound, the first aluminum ears of the bipolar ears are overlapped together, the second aluminum ears of the bipolar ears are overlapped together, and the first aluminum ears and the second aluminum ears are not overlapped.
4. The positive electrode bipolar ear cell of claim 2, wherein the number of copper ears formed on the negative electrode sheet is a plurality, and each copper ear is overlapped together after the positive electrode sheet, the separator and the negative electrode sheet are wound.
5. The positive bipolar ear cell of claim 1, wherein each of the first aluminum ears and each of the second aluminum ears are welded to the positive plate.
6. The positive bipolar ear cell of claim 1, wherein each copper tab is welded to the negative plate.
7. The positive bipolar ear cell of claim 1, wherein the positive plate and the negative plate are each a plurality of;
the positive electrode bipolar ear cell further comprises a plurality of diaphragms, and the positive electrode plate, the negative electrode plate and the diaphragms are sequentially stacked together according to the sequence of 'diaphragm/negative electrode plate/diaphragm/positive electrode plate'.
8. The positive electrode bipolar ear cell of claim 7, wherein the number of the bipolar ears formed on each positive electrode sheet is one, and when each positive electrode sheet, each separator and each negative electrode sheet are stacked, first aluminum ears of each bipolar ear are stacked together, second aluminum ears of each bipolar ear are stacked together, and each first aluminum ear is not stacked with each second aluminum ear.
9. The positive electrode bipolar ear cell of claim 7, wherein the number of copper ears formed on each of the negative electrode sheets is one, and each copper ear is overlapped when the positive electrode sheet, the separator and the negative electrode sheet are laminated.
10. The positive bipolar ear cell of claim 1, further comprising a housing, wherein the housing is wrapped around the positive plate and the negative plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321115862.XU CN220042213U (en) | 2023-05-05 | 2023-05-05 | Positive electrode bipolar ear cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321115862.XU CN220042213U (en) | 2023-05-05 | 2023-05-05 | Positive electrode bipolar ear cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220042213U true CN220042213U (en) | 2023-11-17 |
Family
ID=88738442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321115862.XU Active CN220042213U (en) | 2023-05-05 | 2023-05-05 | Positive electrode bipolar ear cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220042213U (en) |
-
2023
- 2023-05-05 CN CN202321115862.XU patent/CN220042213U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202373667U (en) | Electrical core of lithium ion battery and pole piece thereof | |
| WO2022116909A1 (en) | High-capacity lithium-ion battery | |
| CN209981369U (en) | Cylindrical battery | |
| WO2021232720A1 (en) | Multi-tab cylindrical battery roll core and lithium ion battery | |
| CN111509180B (en) | Lithium battery cell with conductive tabs | |
| CN111640994A (en) | Battery roll core and manufacturing method of lithium battery using same | |
| CN212230543U (en) | Laminated curved surface battery | |
| CN114975864A (en) | Pole piece, electric core structure, lithium battery and electronic equipment | |
| CN220042213U (en) | Positive electrode bipolar ear cell | |
| CN114361661B (en) | Square shell cell and battery module | |
| CN202395088U (en) | Cylindrical lithium ion battery | |
| CN211700342U (en) | Laminated cell and button cell | |
| CN202758957U (en) | Novel high charge-discharge rate battery | |
| CN111490219A (en) | Cylindrical lithium ion battery roll core structure | |
| CN220324662U (en) | Core package assembly and multi-pole group battery core | |
| CN217468486U (en) | Pole piece structure, battery cell and lithium ion battery | |
| CN217062169U (en) | Negative plate component, battery core and laminated battery | |
| CN211556031U (en) | Battery cell and battery | |
| CN220106813U (en) | Unidirectional multipolar ear battery with multi-winding core connecting sheet | |
| CN112563578B (en) | Battery cell preparation method and battery cell | |
| CN220604755U (en) | Square battery structure with double cover plates | |
| CN220604744U (en) | Battery cell | |
| CN218548478U (en) | Battery core positive electrode structure and laminated battery with same | |
| CN115763692B (en) | Positive plate and battery | |
| CN219553838U (en) | Multipolar ear lithium ion battery core and battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |