CN216903080U - Electric core of lithium ion cylinder power battery - Google Patents
Electric core of lithium ion cylinder power battery Download PDFInfo
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- CN216903080U CN216903080U CN202122428256.0U CN202122428256U CN216903080U CN 216903080 U CN216903080 U CN 216903080U CN 202122428256 U CN202122428256 U CN 202122428256U CN 216903080 U CN216903080 U CN 216903080U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model relates to a battery core of a lithium ion cylindrical power battery.A ceramic layer is arranged above an anode dressing on an anode plate, and an anode empty foil is arranged from the upper part of the ceramic layer to the edge of the anode dressing; and a negative empty foil is arranged below the negative dressing and is parallel and level to the lower end of the battery core. The utility model is safe and reliable, and has the characteristics of small internal resistance, fast conduction, small self-consumption and high volume energy ratio; the head of the battery cell structure is folded after being flattened, so that the space avoidance position can be formed by the spacing ring and the head of the battery cell, and the top of the battery cell is prevented from being crushed due to the fact that the spacing ring directly contacts the head after the cover is closed.
Description
Technical Field
The utility model relates to a lithium ion battery, in particular to a battery cell of a lithium ion cylindrical power battery.
Background
The prior art has the following disadvantages:
the traditional battery core adopts a mode of welding a positive lug and a negative lug, so that the mode has high internal resistance and high self energy consumption;
secondly, the positive dressing and the empty foil adopted by the traditional battery cell positive plate do not consider that the winding fluctuation negative dressing edge is easily lower than the positive dressing edge, and the dressing edge (the joint of the empty foil and the dressing) damages and falls off materials after the sheet is kneaded, so that the potential safety hazard of lithium precipitation is easily caused;
and the traditional battery core adopts a full-glue coating mode, and the deformation stress generated in the battery core charging and discharging process can not be released, so that the phenomenon of lithium precipitation by wrinkles of the pole piece is easily caused.
Disclosure of Invention
The utility model aims to solve the problems and provides a battery cell of a lithium ion cylindrical power battery.
The technical scheme adopted by the utility model is as follows:
the utility model provides a lithium ion cylinder power battery's electric core, includes the electric core, and the electric core includes: the battery comprises a positive plate, a negative plate, a diaphragm I, a diaphragm II, C-shaped glue, positive head protection glue and negative head protection glue, wherein a positive dressing is arranged on the positive plate, a negative dressing is arranged on the negative plate, a ceramic layer is arranged above the positive dressing on the positive plate, a positive empty foil is arranged from the upper part of the ceramic layer to the edge of the positive dressing, the positive empty foil is parallel to the top end of the battery core, and the lower end of the positive plate is higher than the lower end of the negative plate; the negative electrode dressing extend to the edge of the upper end of the negative electrode piece, the edge of the negative electrode dressing at the upper end corresponds to the ceramic layer of the positive electrode piece, a negative electrode empty foil is arranged below the negative electrode dressing, the negative electrode empty foil is parallel and level to the lower end of the battery core, and the upper end of the negative electrode piece is lower than the positive electrode piece. The head of the positive electrode is provided with positive electrode head protective glue, and the height of the upper end of the protective glue exceeds the surface of the positive electrode flat head; the head part of the negative electrode is provided with a negative electrode head protection glue, and the lower end of the protection glue downwards exceeds the negative electrode kneading flat head surface; the diameters of the positive electrode head and the negative electrode head are smaller than the diameter of the battery cell by 1-2 mm.
The utility model has the beneficial effects that: the product adopts the technical scheme, and mainly has the following advantages:
the battery core adopts a full-lug structure and has the characteristics of small internal resistance, fast conduction, small power consumption and high volume energy ratio;
the cell structure adopts a structure that the edge of the negative dressing corresponds to the positive ceramic layer, so that the damage to the positive plate dressing during kneading of the positive empty foil can be effectively avoided, the problem of poor coating caused by the fluctuation of the pole piece during winding can be effectively avoided, and the structure is safe and reliable;
the winding and rubber coating of the battery cell adopts a C-rubber structure, so that the deformation stress release generated in the charging and discharging processes of the battery cell can be relieved, and the phenomenon of lithium precipitation caused by wrinkles of a pole piece is solved;
the positive and negative ends of the battery cell are protected by adopting a wrapping glue sticking mode, the wrapping glue exceeds the flat head part, and the structure can limit the downward pressing of the spacing ring and prevent the spacing ring from damaging the top of the battery cell after the cover is closed;
a central hole with the thickness of 5-8mm is reserved after the cell structure is kneaded flat, so that electrolyte can better permeate into the cell after liquid injection, and the pole pieces can be more fully soaked;
and sixthly, the head is folded after the cell structure is flattened, and the diameter = winding diameter- (1-2 mm) after the cell structure is flattened, so that the spacing ring and the head of the cell can form a space avoiding position, and the situation that the top of the cell is crushed due to the fact that the spacing ring directly contacts the head after the cell structure is closed is prevented.
Drawings
Fig. 1 is a perspective view of one embodiment of the present invention.
Fig. 2 is an exploded perspective view of the main components of fig. 1.
Fig. 3 is a schematic perspective view of the winding core.
Fig. 4 is a schematic front view of the positive electrode sheet after being unfolded.
Fig. 5 is a schematic front view of the negative electrode sheet after being unfolded.
Detailed Description
As shown in fig. 1 to 5, the present invention includes: the battery comprises a battery core 1, wherein the battery core comprises a positive plate 14, a negative plate 16, a first diaphragm 11, a second diaphragm 12, C-shaped glue 3, positive head protective glue 2 and negative head protective glue 4, a positive dressing 141 is arranged on the positive plate, a negative dressing 161 is arranged on the negative plate, a ceramic layer 142 is arranged above the positive dressing on the positive plate, a positive empty foil 143 is arranged from the upper part of the ceramic layer to the edge of the positive dressing, the positive empty foil is flush with the top end of the battery core, and the lower end of the positive plate is higher than the lower end of the negative plate; the negative dressing extends to the edge of the upper end of the negative plate, the edge of the negative dressing at the upper end corresponds to the ceramic layer of the positive plate, a negative empty foil 162 is arranged below the negative dressing 161, the negative empty foil is flush with the lower end of the battery core, and the upper end of the negative plate is lower than the positive plate; the head of the positive electrode is provided with positive electrode head protective glue, and the height of the upper end of the protective glue exceeds the surface of the positive electrode flat head; the head part of the negative electrode is provided with a negative electrode head protection glue, and the lower end of the protection glue downwards exceeds the negative electrode kneading flat head surface; the diameters of the positive electrode head and the negative electrode head are smaller than the diameter of the battery cell by 1-2 mm.
A processing method of a battery core of a lithium ion cylindrical power battery comprises the following processing steps:
firstly, overlapping and rolling a diaphragm I and a diaphragm for 2-3 circles;
secondly, feeding the negative empty foil downwards between two layers of diaphragms, and then pre-winding the negative plate for 1-2 circles;
feeding the empty foil of the positive plate upwards onto the upper diaphragm, starting winding, and cutting off the two diaphragms after winding is finished;
sticking C-type adhesive paper to the battery cell by the adhesive sticking mechanism;
fifthly, conveying the battery cell to a kneading mechanism to knead the two ends of the positive electrode and the negative electrode;
sixthly, the hole burning machine burns the central part 15 of the upper end and the lower end of the battery cell;
collecting tabs at the positive and negative electrode ends of the battery cell to enable the diameters of the head parts of the positive electrode and the negative electrode to be smaller than the diameter of the battery cell by 1-2 mm;
and adhering head protection gummed paper to the side walls of the positive and negative electrode head battery cells by a gumming machine after being furled, wherein the height of the upper end of the positive electrode protection gummed paper exceeds the positive electrode flat head kneading face, the height of the lower end of the negative electrode protection gummed paper exceeds the negative electrode flat head kneading face, and the production work of a single battery cell of the battery cell is completed at the moment.
The utility model is not limited to the embodiments described above, but many variations can be made by a person having the basic knowledge in the field to which the utility model pertains without going beyond the inventive idea of the claims, which also falls within the protective scope of the utility model.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (1)
1. A battery cell of a lithium ion cylindrical power battery comprises a battery cell (1), wherein the battery cell comprises: anodal piece (14), negative pole piece (16), diaphragm (114), diaphragm two (12), C type are glued (3), anodal head protection is glued (2), negative pole head protection is glued (4), are equipped with anodal dressing on the anodal piece, are equipped with negative dressing on the negative pole piece, its characterized in that:
a ceramic layer (141) is arranged above the positive dressing on the positive plate, a positive empty foil (142) is arranged from the upper part of the ceramic layer to the edge of the positive dressing, the positive empty foil is flush with the top end of the battery core, and the lower end of the positive plate is higher than the lower end of the negative plate;
the negative dressing extends to the edge of the upper end of the negative plate, and the edge of the negative dressing at the upper end corresponds to the ceramic layer of the positive plate;
a negative empty foil (162) is arranged below the negative dressing (161), the negative empty foil is flush with the lower end of the battery core, and the upper end of the negative plate is lower than the positive plate;
the head of the positive electrode is provided with positive electrode head protective glue, and the height of the upper end of the protective glue exceeds the surface of the positive electrode flat head;
the head part of the negative electrode is provided with a negative electrode head protection glue, and the lower end of the protection glue downwards exceeds the negative electrode kneading flat head surface;
the diameters of the positive electrode head and the negative electrode head are smaller than the diameter of the battery cell by 1-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122428256.0U CN216903080U (en) | 2021-10-09 | 2021-10-09 | Electric core of lithium ion cylinder power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122428256.0U CN216903080U (en) | 2021-10-09 | 2021-10-09 | Electric core of lithium ion cylinder power battery |
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| Publication Number | Publication Date |
|---|---|
| CN216903080U true CN216903080U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122428256.0U Active CN216903080U (en) | 2021-10-09 | 2021-10-09 | Electric core of lithium ion cylinder power battery |
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| CN (1) | CN216903080U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115692863A (en) * | 2022-11-04 | 2023-02-03 | 厦门海辰储能科技股份有限公司 | Structure and encapsulation method of battery core, battery monomer, energy storage device and electric equipment |
-
2021
- 2021-10-09 CN CN202122428256.0U patent/CN216903080U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115692863A (en) * | 2022-11-04 | 2023-02-03 | 厦门海辰储能科技股份有限公司 | Structure and encapsulation method of battery core, battery monomer, energy storage device and electric equipment |
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