CN217134454U - Large-pole-piece laminated cell unit and laminated cell structure - Google Patents
Large-pole-piece laminated cell unit and laminated cell structure Download PDFInfo
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- CN217134454U CN217134454U CN202220935175.1U CN202220935175U CN217134454U CN 217134454 U CN217134454 U CN 217134454U CN 202220935175 U CN202220935175 U CN 202220935175U CN 217134454 U CN217134454 U CN 217134454U
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- diaphragm
- pole piece
- unit
- laminated cell
- pole
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- 238000003475 lamination Methods 0.000 abstract description 16
- 230000005611 electricity Effects 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 9
- 238000005520 cutting process Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 238000007731 hot pressing Methods 0.000 description 3
- 239000012528 membrane Substances 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 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
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a laminated cell structure, which comprises a plurality of stacked laminated cell units, wherein each laminated cell unit comprises a first pole piece, a first diaphragm, a second pole piece and a second diaphragm; the width of the first pole piece is smaller than half of the width of the first diaphragm, the width of the second pole piece is consistent with that of the second diaphragm, and the sizes of the first diaphragm and the second diaphragm are consistent. The utility model discloses be provided with first pole piece, first diaphragm, second pole piece, second diaphragm in lamination electricity core unit, set up to unanimity through the size with second pole piece and diaphragm to folding the preparation lamination electricity core unit of diaphragm and second pole piece, not only the preparation is efficient, realizes the control of tension and rectifying easily in the manufacturing process, can reduce the pole piece and cut the number of times moreover, has reduced the battery short circuit risk because of the pole piece cuts the burr and leads to.
Description
Technical Field
The utility model relates to a lithium ion battery technical field specifically is a big pole piece lamination electricity core unit and lamination electricity core structure.
Background
At present, a laminated battery core of a lithium battery mostly adopts a Z-shaped lamination process or a thermal compounding process; the Z-shaped lamination process is that the positive plate and the negative plate are arranged on the diaphragm which does Z-shaped swing in a crossed manner; the thermal compounding process is to obtain a double-layer unit by hot-pressing the positive plate/diaphragm/negative plate/diaphragm, and then stack a plurality of double-layer units, thereby obtaining the stacked core of the lithium battery.
No matter the 'Z-shaped lamination' process or the 'thermal compounding' process, the positive and negative pole pieces are required to be prepared in advance, the cutting times of the pole pieces are too many, metal dust and burrs are generated, the short circuit risk of the lithium battery is greatly increased, and materials are seriously wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a can reduce pole piece and cut lamination electricity core structure of number of times is provided.
The utility model discloses a following technical means realizes solving above-mentioned technical problem:
a laminated cell unit comprising a first pole piece, a first diaphragm (112), a second pole piece, a second diaphragm (122); the width of the first pole piece is less than half of the width of the first diaphragm (112), the width of the second pole piece is consistent with the width of the second diaphragm (122), and the first diaphragm (112) is consistent with the size of the second diaphragm (122); the first pole piece is arranged in the bent first diaphragm (112) to form a first unit (11), the second pole piece is arranged in the bent second diaphragm (122), and the first unit (11) is arranged between the bent second pole pieces; a first pole piece is arranged on the outer side of the second diaphragm (122); the polarity of the first pole piece is opposite to that of the second pole piece.
The size of the second pole piece and the size of the diaphragm are set to be consistent, the diaphragm and the second pole piece are folded to manufacture the laminated battery cell unit, the manufacturing efficiency is high, tension and deviation correction control are easily realized in the manufacturing process, pole piece cutting times can be reduced, and the risk of short circuit of the battery caused by pole piece cutting burrs is reduced.
Further, the laminated cell unit is arranged from top to bottom in a manner of a first pole piece, a diaphragm, a second pole piece, a diaphragm, a first pole piece, a diaphragm, a second pole piece, and a diaphragm.
Further, the first pole piece and the diaphragm or the second pole piece and the diaphragm are a layer; the laminated cell unit has a four-layer structure; the first diaphragm (112) is folded along the width direction to wrap the positive electrode sheet (111) to form a first unit (11); the second diaphragm (122) and the second pole piece are folded along the width direction to wrap the first unit (11); and a first pole piece is arranged on the outer side of the second diaphragm (122).
The utility model also discloses an including above-mentioned arbitrary technical scheme the lamination electricity core structure of lamination electricity core unit, including a plurality of lamination electricity core units that pile up.
During assembly, pole piece sequences are arranged in advance, the diaphragm and the pole pieces are matched to be folded, multilayer laminated battery cell units of different types can be obtained, and then the laminated battery cell structures can be obtained by stacking the laminated battery cell units.
The utility model also discloses a laminated battery cell unit, which comprises a first pole piece, a first diaphragm (112), a second pole piece and a second diaphragm (122); at least two first pole pieces are tiled on the first diaphragm (112), and the width of each first pole piece is smaller than half of the width of the first diaphragm (112); at least two second pole pieces are tiled on the second diaphragm (122), and the width of each second pole piece is consistent with that of the second diaphragm (122); the first diaphragm (112) is of a size consistent with the second diaphragm (122); the first pole piece is arranged in the bent first diaphragm (112) to form a first unit (11), the second pole piece is arranged between the bent second diaphragms (122), and the first unit (11) is arranged between the bent second pole pieces to form a second unit (12); at least one first pole piece is arranged in a second unit (12) bent along the length direction; a first pole piece is arranged outside the bent second unit (12); the polarity of the first pole piece is opposite to that of the second pole piece.
The size of the second pole piece and the size of the diaphragm are set to be consistent, and the diaphragm and the second pole piece are folded to manufacture the laminated battery cell unit, so that the manufacturing efficiency is high, tension and deviation correction control are easily realized in the manufacturing process, the pole piece cutting times can be reduced, and the battery short circuit risk caused by pole piece cutting burrs is reduced.
Further, the laminated cell unit is arranged from top to bottom in a manner of a first pole piece, a diaphragm, a second pole piece, a diaphragm, a first pole piece, a diaphragm, a second pole piece, and a diaphragm.
Further, the first pole piece and the diaphragm or the second pole piece and the diaphragm are a layer; the laminated cell unit has an eight-layer structure; two first pole pieces are tiled on the first diaphragm (112); two second pole pieces are tiled on the second diaphragm (122); the first pole pieces are arranged between the bent first diaphragms (112) to form first units (11), the second pole pieces are arranged between the bent second diaphragms (122), and the first units (11) are arranged between the bent second pole pieces to form second units (12); the first pole piece is arranged between the second units (12) folded in half along the length direction; a first pole piece is arranged outside the folded second unit (12).
The utility model also discloses an including above-mentioned arbitrary technical scheme the lamination electricity core structure of lamination electricity core unit, including a plurality of lamination electricity core units that pile up.
During assembly, pole piece sequences are arranged in advance, the diaphragm and the pole pieces are matched to be folded, multilayer laminated battery cell units of different types can be obtained, and then the laminated battery cell structures can be obtained by stacking the laminated battery cell units.
The utility model has the advantages that:
the utility model discloses be provided with first pole piece, first diaphragm, second pole piece, second diaphragm in lithium battery lamination electricity core unit, set up to unanimous through the size with second pole piece and diaphragm to folding the preparation lamination electricity core unit of diaphragm and second pole piece, not only the preparation is efficient, realizes tension and the control of rectifying easily in the manufacturing process, can reduce the pole piece and cut the number of times moreover, has reduced the battery short circuit risk that leads to because of the pole piece cuts the burr.
Drawings
Fig. 1 is a front view of a laminated cell structure according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a forming of a first unit in a laminated cell structure according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating a forming process of a laminated cell unit in a laminated cell structure according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a forming of a first unit in a second laminated cell structure according to an embodiment of the present invention;
fig. 5 is a schematic diagram of the embodiment of the present invention, which illustrates a laminated cell unit in a two-laminated cell structure.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Example one
As shown in fig. 1, the present embodiment provides a laminated cell structure including a plurality of stacked laminated cell units 1.
As shown in fig. 2 and 3, the laminated cell unit 1 has a four-layer structure (one layer of the positive electrode tab 111, the separator or the negative electrode tab 121, and the separator), and the laminated cell unit 1 includes the positive electrode tab 111, the first separator 112, the negative electrode tab 121, and the second separator 122; the width of the positive plate 111 is less than half of the width of the first diaphragm 112, the width of the negative plate 121 is consistent with the width of the second diaphragm 122, and the sizes of the first diaphragm 112 and the second diaphragm 122 are consistent; the positive electrode sheet 111 is fixed in the bent first diaphragm 112 to form a first unit 11, the negative electrode sheet 121 is fixed in the bent second diaphragm 122, and the first unit 11 is fixed between the bent negative electrode sheets 121; the positive electrode tab 111 is fixed to the outer side of the second separator 122.
During assembly, one positive plate 111 is placed above the first diaphragm 112, and the first diaphragm 112 is folded in half for 180 degrees along the width direction to obtain a first unit 11; then one negative electrode sheet 121 is placed over the second separator 122; then the first cell 111 is placed at the lower position of the above negative electrode tab 121; the negative electrode sheet 121 and the second diaphragm 122 are folded in half along the width direction, and the first unit 11 is coated to obtain a three-layer unit; then, on the basis of the three-layer unit, a positive plate 111 is placed on the negative plate 121 coated with the diaphragm, and the plates and the diaphragm are bonded together through a hot pressing process, so that the laminated cell unit 1 with the four-layer structure is obtained.
Example two
As shown in fig. 4 and 5, the present embodiment is different from the first embodiment in that, on the basis of the first embodiment, the laminated cell unit 1 has an eight-layer structure; two positive plates 111 are flatly laid on the first diaphragm 112, and the width of each positive plate 111 is smaller than half of the width of the first diaphragm 112; two negative plates 121 are flatly laid on the second membrane 122, and the widths of the negative plates 121 are consistent with the width of the second membrane 122; the first diaphragm 112 is the same size as the second diaphragm 122; the positive electrode sheet 111 is fixed between the bent first diaphragms 112 to form a first unit 11, the negative electrode sheet 121 is fixed between the bent second diaphragms 122, and the first unit 11 is fixed between the bent second electrode sheets 121 to form a second unit 12; the positive electrode tab 111 is fixed between the second cells 12 folded in half in the longitudinal direction; the positive electrode tab 111 is fixed to the outside of the folded second unit 12.
During assembly, two positive plates 111 are placed above the first diaphragm 112, the first diaphragm 112 is folded in half for 180 degrees along the width direction, and the positive plates 111 are covered by the first diaphragms 112 on the upper and lower surfaces of the positive plates to obtain a first unit 11; then, two negative electrode sheets 121 are placed above the second separator 122; then, the first cell 111 is placed at the lower position of the negative electrode tab 121; the negative electrode sheet 121 and the second diaphragm 122 are folded in half along the width direction, and the first unit 11 is coated, so that two connected three-layer units (the second unit 12) are obtained; then, a positive plate 111 is placed on the three-layer unit at the right end; clockwise folding the three-layer unit at the left end by 180 degrees to obtain a seven-layer unit; on the basis of the seven-layer unit, a positive plate 111 is placed on the negative plate 121 coated with the diaphragm, and the plates and the diaphragm are bonded together through a hot pressing process, so that the laminated cell unit 1 with the eight-layer structure is obtained.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A large pole piece laminated cell unit comprising a first pole piece, a first diaphragm (112), a second pole piece, a second diaphragm (122); the width of the first pole piece is less than half of the width of the first diaphragm (112), the width of the second pole piece is consistent with the width of the second diaphragm (122), and the first diaphragm (112) is consistent with the size of the second diaphragm (122); the first pole piece is arranged in the bent first diaphragm (112) to form a first unit (11), the second pole piece is arranged in the bent second diaphragm (122), and the first unit (11) is arranged between the bent second pole pieces; a first pole piece is arranged on the outer side of the second diaphragm (122); the polarity of the first pole piece is opposite to that of the second pole piece.
2. The large pole piece laminated cell unit of claim 1, wherein: the laminated battery cell unit is arranged from top to bottom in a mode of a first pole piece, a diaphragm, a second pole piece, a diaphragm, a first pole piece, a diaphragm, a second pole piece and a diaphragm.
3. The large pole piece laminated cell unit of claim 2, wherein: the first pole piece and the diaphragm or the second pole piece and the diaphragm are a layer; the laminated cell unit has a four-layer structure; the first diaphragm (112) is folded along the width direction to wrap the positive electrode sheet (111) to form a first unit (11); the second diaphragm (122) and the second pole piece are folded along the width direction to wrap the first unit (11); and a first pole piece is arranged on the outer side of the second diaphragm (122).
4. A laminated cell structure comprising a large pole piece laminated cell unit of any of claims 1-3, wherein: comprising a plurality of stacked laminated cell units.
5. A large pole piece laminated cell unit comprising a first pole piece, a first diaphragm (112), a second pole piece, a second diaphragm (122); at least two first pole pieces are tiled on the first diaphragm (112), and the width of each first pole piece is smaller than half of the width of the first diaphragm (112); at least two second pole pieces are tiled on the second diaphragm (122), and the width of each second pole piece is consistent with that of the second diaphragm (122); the first diaphragm (112) is of a size consistent with the second diaphragm (122); the first pole piece is arranged in the bent first diaphragm (112) to form a first unit (11), the second pole piece is arranged between the bent second diaphragms (122), and the first unit (11) is arranged between the bent second pole pieces to form a second unit (12); at least one first pole piece is arranged in a second unit (12) bent along the length direction; a first pole piece is arranged outside the bent second unit (12); the polarity of the first pole piece is opposite to that of the second pole piece.
6. The large pole piece laminated cell unit of claim 5, wherein: the laminated battery cell unit is arranged from top to bottom in a mode of a first pole piece, a diaphragm, a second pole piece, a diaphragm, a first pole piece, a diaphragm, a second pole piece and a diaphragm.
7. The large pole piece laminated cell unit of claim 6, wherein: the first pole piece and the diaphragm or the second pole piece and the diaphragm are a layer; the laminated cell unit has an eight-layer structure; two first pole pieces are tiled on the first diaphragm (112); two second pole pieces are tiled on the second diaphragm (122); the first pole pieces are arranged between the bent first diaphragms (112) to form first units (11), the second pole pieces are arranged between the bent second diaphragms (122), and the first units (11) are arranged between the bent second pole pieces to form second units (12); the first pole piece is arranged between the second units (12) folded in half along the length direction; a first pole piece is arranged outside the folded second unit (12).
8. A laminated cell structure comprising a large pole piece laminated cell unit of any of claims 5 to 7, wherein: comprising a plurality of stacked laminated cell units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220935175.1U CN217134454U (en) | 2022-04-21 | 2022-04-21 | Large-pole-piece laminated cell unit and laminated cell structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220935175.1U CN217134454U (en) | 2022-04-21 | 2022-04-21 | Large-pole-piece laminated cell unit and laminated cell structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217134454U true CN217134454U (en) | 2022-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220935175.1U Active CN217134454U (en) | 2022-04-21 | 2022-04-21 | Large-pole-piece laminated cell unit and laminated cell structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217134454U (en) |
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2022
- 2022-04-21 CN CN202220935175.1U patent/CN217134454U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Xuanyi New Energy Development Co.,Ltd. Assignor: Hefei Guoxuan High-Tech Power Energy Co.,Ltd. Contract record no.: X2023980049293 Denomination of utility model: A large electrode stacked cell unit and stacked cell structure Granted publication date: 20220805 License type: Common License Record date: 20231207 |
|
| EE01 | Entry into force of recordation of patent licensing contract |