CN221009072U - Positive and negative electrode cover plate assembly of full tab and battery - Google Patents
Positive and negative electrode cover plate assembly of full tab and battery Download PDFInfo
- Publication number
- CN221009072U CN221009072U CN202322620841.XU CN202322620841U CN221009072U CN 221009072 U CN221009072 U CN 221009072U CN 202322620841 U CN202322620841 U CN 202322620841U CN 221009072 U CN221009072 U CN 221009072U
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- Prior art keywords
- cover plate
- positive
- positive electrode
- battery
- negative
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 33
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 238000007789 sealing Methods 0.000 claims description 7
- 239000003792 electrolyte Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a full-lug positive and negative electrode cover plate assembly, which comprises: the positive electrode current collecting plate and the positive electrode switching sheet are connected in a concave-convex matching mode, and a through hole is formed in the middle of the positive electrode switching sheet; the lower end of the positive pole post is connected with the through hole on the positive pole rotating sheet in a penetrating way; the upper end of the positive pole post penetrates through the negative pole cover plate and extends to the other side of the negative pole cover plate, and an insulating piece is arranged on the other side of the negative pole cover plate; the positive electrode cover plate is arranged on one side of the insulating piece and is riveted with the positive electrode post through a rivet; wherein the positive electrode cover plate and the negative electrode cover plate are respectively connected with a positive electrode lead and a negative electrode lead. The cover plate of the utility model connects the battery core and the pole by using the current collecting disc and the switching piece, multiplies the large current conduction area, shortens the current conduction distance, finally reduces the internal resistance of the battery, integrates the positive electrode and the negative electrode of the battery at the same end of the battery, reduces the whole length and the manufacturing cost of the battery, and saves the installation space of the battery.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a full-lug positive and negative electrode cover plate assembly and a battery.
Background
The tab is a raw material of a lithium ion polymer battery product, namely a metal conductor which leads the positive electrode and the negative electrode out of the battery core, in other words, the tab is a contact point of the positive electrode and the negative electrode of the battery when the battery is charged and discharged. Part of the current of the lithium battery must flow through the tab to be connected with the outside of the battery.
The positive and negative poles of the currently used battery are respectively arranged at two ends of the battery, so that the lugs are required to be arranged at the two ends of the battery, the cost of the battery can be increased, and the whole length of the battery can be increased, so that a large installation space can be occupied. To change this problem, the full tab process becomes a new power cell manufacturing solution, and thus, it is necessary to consider how the positive and negative electrode tabs ensure connection with the internal battery cells without the lead-out tab.
Disclosure of utility model
The utility model aims to solve the problems, designs a full-tab positive and negative electrode cover plate assembly and a battery, and solves the problems that the battery is higher due to the fact that positive and negative electrodes are arranged at two ends of the battery in the full-tab battery.
The technical scheme of the utility model for achieving the purpose is that the full-lug positive and negative electrode cover plate assembly comprises:
The positive electrode current collecting plate and the positive electrode switching sheet are connected in a concave-convex fit mode, and a through hole is formed in the middle of the positive electrode switching sheet;
the lower end of the positive pole post is connected with the through hole on the positive pole switching sheet in a penetrating way;
the upper end of the positive pole post penetrates through the negative pole cover plate and extends to the other side of the negative pole cover plate, and an insulating piece is arranged on the other side of the negative pole cover plate;
The positive electrode cover plate is arranged on one side of the insulating piece and is riveted with the positive electrode post through a rivet;
wherein the positive electrode cover plate and the negative electrode cover plate are respectively connected with a positive electrode lead and a negative electrode lead.
Preferably, an insulating ring is arranged between the negative electrode cover plate and the positive electrode switching sheet, and the insulating ring is sleeved on the positive electrode post.
Preferably, a sealing ring is arranged on the positive pole post, and the sealing ring is arranged on one side of the negative cover plate, which is close to the insulating ring.
Preferably, a plurality of liquid inlets for the electrolyte to pass through are uniformly distributed on the positive current collecting disc.
Preferably, the positive electrode cover plate is provided with a jack, and the positive electrode post penetrates through the jack and the insulating piece and is connected with the positive electrode cover plate.
Preferably, a plurality of clamping grooves are uniformly distributed along the circumferential direction of the jack on the positive electrode cover plate, the clamping grooves are communicated with the jack, a plurality of protrusions distributed in an annular array are arranged at the bottom of the insulating part, and the insulating part is matched and clamped with the plurality of clamping grooves on the positive electrode cover plate through the plurality of protrusions.
Preferably, the anode cover plate is provided with an oblong explosion-proof hole, and an explosion-proof membrane is arranged in the explosion-proof hole.
Preferably, the positive electrode rotating sheet is provided with a plurality of lightening holes.
The utility model also provides a battery, which comprises the positive and negative electrode cover plate assembly and a battery core, wherein the positive and negative electrode cover plate is arranged at one end of the battery core, and the other end of the battery core is provided with a liquid injection assembly.
Preferably, the liquid injection component comprises a connecting plate and a liquid injection piece penetrating through the connecting plate, a liquid injection hole is formed in the middle of the liquid injection piece, a mounting hole is formed in one end of the battery cell where the liquid injection component is located, the liquid injection piece penetrates through the mounting hole, and the end face of the liquid injection piece is flush with the end face of the battery cell.
Compared with the prior art, the beneficial effects are that:
in the present utility model
The cover plate is suitable for a brand-new all-lug battery structure, the current collecting disc and the transfer sheet are used for connecting the battery core and the pole column while the functions of the original cover plate assembly are maintained, the large current conduction area is multiplied, the current conduction distance is shortened, the internal resistance of the battery is finally reduced, meanwhile, the anode cover plate and the cathode cover plate are respectively welded with the anode lead and the cathode lead, the anode lead and the cathode lead of the battery are integrated at the same end of the battery, the overall length and the manufacturing cost of the battery are reduced, and the installation space of the battery is also saved.
Drawings
FIG. 1 is a schematic cross-sectional view of the positive and negative electrode cap plate assembly of the full tab battery of example 1;
FIG. 2 is a schematic diagram of an exploded structure of the positive and negative electrode cap plate assembly of the full tab battery of example 1;
fig. 3 is a schematic structural view of an insulating member in embodiment 1;
fig. 4 is a schematic view of the overall structure of the battery in example 2;
Fig. 5 is a schematic sectional structure of the battery in embodiment 2;
fig. 6 is a schematic view of the explosive structure of the battery in example 2.
In the figure, 1, a cathode cover plate; 101. a clamping groove; 102. explosion-proof holes; 2. a positive electrode current collecting plate; 21. a liquid inlet hole; 3. a positive electrode switching piece; 31. a lightening hole; 4. a positive electrode post; 5. an insulating ring; 6. a seal ring; 7. an insulating member; 71. a plug-in part; 72. a protrusion; 8. a positive electrode cover plate; 9. an explosion-proof membrane; 10. a battery cell; 11. a connecting plate; 12. a liquid injection member; 121. and a liquid injection hole.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in fig. 1 and fig. 2, the positive and negative electrode cover plate assembly of the full tab battery provided in embodiment 1 of the present utility model mainly includes a positive electrode current collecting plate 2, a positive electrode switching piece 3, a positive electrode post 4, a negative electrode cover plate 1, a positive electrode cover plate 8, and other components, wherein an insulating member 7 and an insulating ring 5 are respectively disposed on the upper and lower sides of the negative electrode cover plate 1, the insulating ring 5 is located between the positive electrode switching piece 3 and the negative electrode cover plate 1, a hole is disposed in the middle of the negative electrode cover plate 1, the lower end of the positive electrode cover plate 8 is inserted into the hole in the middle of the negative electrode cover plate 1, and the lower end of the positive electrode post 4 passes through a through hole in the middle of the insulating member 7 downward and is inserted into the through hole in the middle of the positive electrode switching piece 3; the positive electrode transfer sheet 3 is engaged with the upper side of the positive electrode current collecting plate 2 in a concave-convex fit manner, and a containing space for containing electrolyte is formed between the positive electrode transfer sheet 3 and the positive electrode current collecting plate 2.
Referring to fig. 1, in order to ensure the tightness of the cover plate assembly, a sealing ring 6 is further sleeved at one end of the positive electrode post 4, which is close to the insulating ring 5, and the sealing ring 6 is positioned between the negative electrode cover plate 1 and the positive electrode tab, is positioned at the inner side of the insulating ring 5, and ensures the tightness of the inside of the battery cell 10.
The positive electrode cover plate 8 is riveted with one end of the positive electrode post 4 close to the insulating piece 7 through a rivet, and the positive electrode cover plate 8 is formed by integral die casting, so that compared with the injection molding, the cost is lower, and the die opening cost is reduced; the positive electrode cover plate 8 and the negative electrode cover plate 1 are respectively connected with a positive electrode lead and a negative electrode lead, so that the positive electrode and the negative electrode of the battery can be integrated at the same end of the battery, and the whole length of the battery can be further reduced.
As shown in fig. 2 and 3, a plugging portion 71 is disposed at the bottom of the insulating member 7, a plurality of protrusions 72 distributed in an array are uniformly distributed along the circumferential direction of the plugging portion 71, and a plurality of clamping grooves 101 are uniformly distributed along the circumferential direction of the insertion hole on the positive electrode cover plate 8, and the insulating member 7 is clamped with the plurality of clamping grooves 101 on the positive electrode cover plate 8 through the plurality of protrusions 72, so that the insulating member 7 is prevented from rotating, and the insulating member 7 mainly plays roles of sealing protection and insulation.
Referring to fig. 2, a plurality of liquid inlet holes 21 through which electrolyte is introduced are uniformly distributed on the positive electrode current collecting plate 2, and the electrolyte in the battery can enter the accommodating space between the positive electrode current collecting plate 2 and the positive electrode switching piece 3 through the liquid inlet holes 21. Meanwhile, a plurality of lightening holes 31 are arranged on the positive electrode switching piece 3, so that the dead weight of the positive electrode switching piece 3 is mainly reduced, and the material cost can be reduced.
In order to prevent explosion caused by excessive internal pressure of the battery, an oblong explosion-proof hole 102 is formed in the negative electrode cover plate 1, and an explosion-proof membrane 9 is arranged in the explosion-proof hole 102, so that the pressure in the battery reaches the limit born by the explosion-proof membrane 9, and the explosion-proof membrane 9 automatically breaks to realize the pressure relief effect.
Example 2
As shown in fig. 4 and 5, embodiment 2 proposes a battery for the positive and negative electrode cover plates 1, the battery mainly comprises a battery cell 10, and a liquid injection assembly and a positive and negative electrode cover plate 1 assembly respectively arranged at two ends of the battery cell 10, referring to fig. 6, the liquid injection assembly mainly comprises a connecting plate 11 and a liquid injection member 12 penetrating through the connecting plate 11, a liquid injection hole 121 is arranged in the middle of the liquid injection member 12, a mounting hole is arranged at a corresponding position on the battery cell 10, the connecting plate 11 is positioned at the inner side of the battery cell 10, one end of the liquid injection member 12 is connected with the connecting plate 11, the other end penetrates through the mounting hole, the end face of the liquid injection member 12 is flush with the end face of the battery cell 10, electrolyte can be injected into the battery cell 10 through the liquid injection hole 121, and the liquid injection hole can be sealed after the liquid injection is completed.
The above technical solution only represents the preferred technical solution of the present utility model, and some changes that may be made by those skilled in the art to some parts of the technical solution represent the principles of the present utility model, and the technical solution falls within the scope of the present utility model.
Claims (10)
1. All-tab positive and negative electrode cover plate assembly, characterized by comprising:
The positive electrode current collecting plate (2) and the positive electrode rotating sheet (3) are connected in a concave-convex fit mode, and a through hole is formed in the middle of the positive electrode rotating sheet (3);
The lower end of the positive pole post (4) is connected with the through hole of the positive pole switching piece (3) in a penetrating way;
The upper end of the positive pole post (4) penetrates through the negative pole cover plate (1) and extends to the other side of the negative pole cover plate (1), and an insulating piece (7) is further arranged on the other side of the negative pole cover plate (1);
A positive electrode cover plate (8) which is provided on one side of the insulating member (7) and is riveted with the positive electrode post (4) by means of a rivet;
wherein the positive electrode cover plate (8) and the negative electrode cover plate (1) are respectively connected with a positive electrode lead and a negative electrode lead.
2. The full-tab positive and negative electrode cover plate assembly according to claim 1, wherein an insulating ring (5) is arranged between the negative electrode cover plate (1) and the positive electrode rotating sheet (3), and the insulating ring (5) is sleeved on the positive electrode post (4).
3. The all-lug positive and negative cover plate assembly according to claim 2, wherein a sealing ring (6) is arranged on the positive electrode post (4), and the sealing ring (6) is arranged on one side of the negative electrode cover plate (1) close to the insulating ring (5).
4. The all-tab positive and negative cover plate assembly according to claim 1, wherein a plurality of liquid inlets (21) for electrolyte to pass through are uniformly distributed on the positive current collecting plate (2).
5. The all-tab positive and negative cover plate assembly according to claim 1, wherein a jack is provided on the positive cover plate (8), and the positive post (4) penetrates through the jack and the insulating member (7) and is connected with the positive cover plate (8).
6. The full-tab positive and negative cover plate assembly according to claim 5, wherein a plurality of clamping grooves (101) are uniformly distributed along the circumferential direction of the jack on the positive cover plate (8), the clamping grooves (101) are communicated with the jack, a plurality of protrusions (72) distributed in an annular array are arranged at the bottom of the insulating piece (7), and the insulating piece (7) is matched and clamped with the plurality of clamping grooves (101) on the positive cover plate (8) through the plurality of protrusions (72).
7. The full-tab anode-cathode cover plate assembly according to claim 1, wherein an oblong explosion-proof hole (102) is formed in the anode cover plate (1), and an explosion-proof membrane (9) is arranged in the explosion-proof hole (102).
8. The full tab positive and negative cap assembly according to claim 1, wherein the positive tab (3) is provided with a plurality of lightening holes (31).
9. A battery, characterized by comprising the full-tab positive and negative electrode cover plate assembly according to any one of claims 1-8, and further comprising an electric core (10), wherein the positive and negative electrode cover plate (1) is arranged at one end of the electric core (10), and a liquid injection assembly is arranged at the other end of the electric core (10).
10. The battery according to claim 9, wherein the liquid injection component comprises a connecting plate (11) and a liquid injection piece (12) penetrating through the connecting plate (11), a liquid injection hole (121) is formed in the middle of the liquid injection piece (12), a mounting hole is formed in one end of the battery cell (10) where the liquid injection component is located, the liquid injection piece (12) penetrates through the mounting hole, and the end face of the liquid injection piece (12) is flush with the end face of the battery cell (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322620841.XU CN221009072U (en) | 2023-09-26 | 2023-09-26 | Positive and negative electrode cover plate assembly of full tab and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322620841.XU CN221009072U (en) | 2023-09-26 | 2023-09-26 | Positive and negative electrode cover plate assembly of full tab and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221009072U true CN221009072U (en) | 2024-05-24 |
Family
ID=91120859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322620841.XU Active CN221009072U (en) | 2023-09-26 | 2023-09-26 | Positive and negative electrode cover plate assembly of full tab and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221009072U (en) |
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2023
- 2023-09-26 CN CN202322620841.XU patent/CN221009072U/en active Active
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