CN204216116U - A kind of lithium battery effectively preventing pole piece short circuit - Google Patents
A kind of lithium battery effectively preventing pole piece short circuit Download PDFInfo
- Publication number
- CN204216116U CN204216116U CN201420581776.2U CN201420581776U CN204216116U CN 204216116 U CN204216116 U CN 204216116U CN 201420581776 U CN201420581776 U CN 201420581776U CN 204216116 U CN204216116 U CN 204216116U
- Authority
- CN
- China
- Prior art keywords
- shell
- upper edge
- diaphragm
- edge
- bulge
- 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.)
- Expired - Lifetime
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 238000004026 adhesive bonding Methods 0.000 claims abstract description 44
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims 2
- 230000004888 barrier function Effects 0.000 abstract 7
- 150000002641 lithium Chemical class 0.000 abstract 1
- 239000003292 glue Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 231100000241 scar Toxicity 0.000 description 4
- 206010040954 Skin wrinkling Diseases 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model relates to field of lithium, be specifically related to a kind of lithium battery effectively preventing pole piece short circuit, comprise battery core and shell, described battery core comprises some pole pieces and barrier film, described barrier film comprises barrier film upper edge and barrier film lower edge, pole piece is welded with lug, described shell has shell fold line, the side of described shell fold line has shell gluing segment, described barrier film upper edge is provided with barrier film upper edge protruding, described shell gluing segment is provided with the protruding gluing segment a in shell upper edge, with shell fold line for symmetry axis, be symmetrical in the protruding gluing segment a in shell upper edge at the opposite side of shell and be provided with the protruding gluing segment b in shell upper edge.The pole piece short circuit phenomenon that this lithium battery effectively can prevent barrier film upper edge wrinkling and cause.
Description
Technical Field
The utility model relates to a lithium cell field, concretely relates to effectively prevent lithium cell of pole piece short circuit.
Background
The existing soft package lithium battery is generally composed of a battery core and a shell. As shown in fig. 1 and 2, each cell is composed of a diaphragm 1, a positive plate 2 and a negative plate 3, and the diaphragm 1 is always arranged between any one positive plate 2 and any one negative plate 3; as shown in fig. 1 and 3, the diaphragm is a single piece of plastic material, the single piece of diaphragm is folded in a zigzag shape to form a diaphragm folding line 7, and a pole piece is arranged between the two diaphragms; the diaphragm has a diaphragm upper rim 6. As shown in fig. 4, the pole piece of the prior art soft-package lithium battery includes a tab 4, and the tab 4 is usually welded with the pole piece body and has a welding scar 5; of course, pole pieces in which the tabs are integrally formed with the pole piece body are now available, but such pole pieces increase the manufacturing cost. As shown in fig. 5, the outer case is generally made of an aluminum plastic film and has an outer case folding line 8, and an outer case adhesive part 9 is formed at one side of the outer case folding line 8, and portions of both sides of the outer case folding line 8 are folded along the outer case folding line 8 and adhered by the outer case adhesive part 9, thereby forming the outer case.
The above-described conventional soft pack lithium battery has disadvantages in that: 1. the welding scars 5 can rub against the upper edge 6 of the diaphragm, the risk of wrinkling of the upper edge 6 of the diaphragm is increased, the risk generally becomes a real hazard in the processes of liquid injection and the like which need to move the semi-finished soft package lithium battery greatly, once the upper edge 6 of the diaphragm is wrinkled, the positive plate and the negative plate can be contacted, and the short circuit phenomenon can occur; 2. in order to prevent the liquid leakage in the soft-package lithium battery and reach the effect of separation air and insulation, connect utmost point ear and shell with utmost point ear glue usually, because the existence that utmost point ear was glued has increased the space between electric core top and the shell, makes the electric core top not hard up easily, has just also increased the diaphragm and has gone up the friction of border 6 with the shell, has then increased the risk of 6 puckering on the diaphragm.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a lithium cell of pole piece short circuit effectively prevents, this lithium cell can effectively prevent on the diaphragm along corrugating and the pole piece short circuit phenomenon that leads to. The technical scheme is as follows:
a lithium battery capable of effectively preventing pole pieces from being short-circuited comprises a battery core and a shell, wherein the battery core comprises a plurality of pole pieces and diaphragms, the diaphragms comprise upper edges of the diaphragms and lower edges of the diaphragms, pole lugs are welded on the pole pieces, the shell is provided with a shell folding line, a shell gluing part is arranged on one side of the shell folding line, an upper edge bulge of the diaphragm is arranged on the upper edge of the diaphragm, the shell gluing part is provided with a raised gluing part a on the upper edge of the shell, the shell folding line is a symmetry axis, and a raised gluing part b on the upper edge of the shell is arranged on the other side of the shell symmetrically to the raised gluing part;
after the pole pieces and the diaphragms are assembled, the upper edge bulges of all the diaphragms are tightly sewed by insulating threads;
after the battery core and the shell are assembled, the upper edge of the diaphragm is protruded, and the upper edge of the shell is protruded and adhered with the part a and the upper edge of the shell is protruded and adhered with the part b.
The upper edge protruding gluing part a of the shell and the upper edge protruding gluing part b of the shell are both coated with glue, and the sewn upper edge protruding of the diaphragm is adhered between the upper edge protruding gluing part a of the shell and the upper edge protruding gluing part b of the shell. When the welding scar rubs with the diaphragm top edge, or loose electric core rubs with the shell, because the diaphragm top edge is protruding tightly with insulating seam for the diaphragm top edge is difficult to corrugate. The upper edge of the diaphragm is only protruded tightly, and the flow of positive and negative ions in the electrolyte is not hindered.
Further, a lower edge bulge of the diaphragm is arranged on the lower edge of the diaphragm, the shell gluing part is provided with a lower edge bulge gluing part a of the shell, the shell folding line is a symmetry axis, and a lower edge bulge gluing part b of the shell is arranged on the other side of the shell symmetrically to the lower edge bulge gluing part a of the shell;
after the pole pieces and the diaphragms are assembled, the lower edges of all the diaphragms are tightly sewn by insulating threads in a protruding mode;
after the battery cell is assembled with the shell, the lower edge of the diaphragm is protruded, and the protruded adhesive part a at the lower edge of the shell and the protruded adhesive part b at the lower edge of the shell are overlapped.
The lower edge protruding gluing part a of the shell and the lower edge protruding gluing part b of the shell are both coated with glue, and the sewn lower edge protrusion of the diaphragm is adhered between the lower edge protruding gluing part a of the shell and the lower edge protruding gluing part b of the shell. The condition that the lower edge of the diaphragm wrinkles due to friction between the lower edge of the diaphragm and the shell occasionally occurs, and the lower edge of the diaphragm is not easy to wrinkle due to the fact that the lower edge of the diaphragm is tightly sewn with the insulation thread in a protruding mode. The lower edge of the diaphragm is only protruded tightly, and the flow of positive and negative ions in the electrolyte is not hindered.
Drawings
Fig. 1 is a schematic diagram of a cell structure of a soft-package lithium battery in the prior art;
fig. 2 is a schematic cross-sectional view of a cell of a soft-package lithium battery in the prior art;
FIG. 3 is a schematic diagram of a separator for a prior art soft pack lithium battery;
FIG. 4 is a schematic diagram of a pole piece of a prior art soft-packed lithium battery;
FIG. 5 is a schematic view of a prior art soft pack lithium battery housing;
fig. 6 is a schematic diagram of a diaphragm of the soft package lithium battery of the present invention;
fig. 7 is a schematic view of a soft package lithium battery case of the present invention; wherein,
1-diaphragm, 2-positive plate, 3-negative plate, 4-pole ear, 5-welding scar, 6-diaphragm upper edge, 7-diaphragm folding line, 8-shell folding line, 9-shell gluing part, 10-diaphragm upper edge bulge, 11-diaphragm lower edge bulge, 12-shell upper edge bulge gluing part a, 13-shell lower edge bulge gluing part a, 14-shell upper edge bulge gluing part b, 15-shell lower edge bulge gluing part b.
Detailed Description
As shown in fig. 6 and 7, a lithium battery for effectively preventing short circuit of pole pieces includes a battery cell and a casing, the battery cell includes a plurality of pole pieces and a diaphragm 1, the diaphragm includes a diaphragm upper edge 6 and a diaphragm lower edge, tabs 4 are welded on the pole pieces, the casing has a casing folding line 8, one side of the casing folding line 8 has a casing gluing part 9, the diaphragm upper edge 6 is provided with a diaphragm upper edge protrusion 10, the casing gluing part is provided with a casing upper edge protrusion gluing part a12, the casing folding line 8 is a symmetry axis, and a casing upper edge protrusion gluing part b14 is arranged on the other side of the casing symmetrically to the casing upper edge protrusion gluing part a 12;
after the pole pieces and the diaphragms 1 are assembled, the bulges 10 at the upper edges of all the diaphragms are tightly sewn by insulating threads; when assembling the pole piece and the diaphragm, the diaphragm 1 is folded according to the Z shape according to the conventional method, and the pole piece is placed between the two folded diaphragms.
After the battery core is assembled with the shell, the upper edge of the diaphragm is overlapped with the protrusion 10, the upper edge of the shell is overlapped with the protrusion adhesive part a12 and the upper edge of the shell is overlapped with the protrusion adhesive part b 14. Glue is applied to both the housing upper rim raised glue portion a12 and the housing upper rim raised glue portion b14 so that the diaphragm upper rim protrusion 10 can be bonded between the housing upper rim raised glue portion a12 and the housing upper rim raised glue portion b 14.
The lower edge of the diaphragm is provided with a lower edge bulge 11 of the diaphragm, the gluing part of the shell is provided with a lower edge bulge gluing part a12 of the shell, the folding line 8 of the shell is taken as a symmetry axis, and the other side of the shell is provided with a lower edge bulge gluing part b15 of the shell symmetrically to the lower edge bulge gluing part a13 of the shell;
after the pole pieces and the diaphragms 1 are assembled, the lower edges of all the diaphragms are tightly sewed by using the bulges 11 through insulating threads;
after the battery core is assembled with the shell, the lower edge protrusion 11 of the diaphragm, the lower edge protrusion adhesive part a13 of the shell and the lower edge protrusion adhesive part b15 of the shell are overlapped.
Glue is applied to both the housing lower edge convex glue portion a13 and the housing lower edge convex glue portion b15 so that the diaphragm lower edge protrusion 11 can be bonded between the housing lower edge convex glue portion a13 and the housing lower edge convex glue portion b 15.
Claims (2)
1. The utility model provides an effectively prevent lithium cell of pole piece short circuit, includes electric core and shell, electric core includes a plurality of pole pieces and diaphragm (1), the diaphragm includes that the edge (6) is followed to the diaphragm and the lower edge of diaphragm, and the welding has utmost point ear (4) on the pole piece, the shell has shell folding line (8), one side of shell folding line (8) has the sticky part of shell (9), its characterized in that: the membrane upper edge (6) is provided with a membrane upper edge bulge (10), the shell gluing part is provided with a shell upper edge bulge gluing part a (12), the shell folding line (8) is taken as a symmetry axis, and the other side of the shell is provided with a shell upper edge bulge gluing part b (14) which is symmetrical to the shell upper edge bulge gluing part a (12);
after the pole pieces and the diaphragms (1) are assembled, the upper edge bulges (10) of all the diaphragms are tightly sewn by insulating threads;
after the battery core and the shell are assembled, the upper edge of the diaphragm is protruded (10), the upper edge of the shell is protruded, and the adhesive part a (12) and the upper edge of the shell are overlapped by the protruded adhesive part b (14).
2. The lithium battery of claim 1, wherein the lithium battery comprises: a lower diaphragm edge bulge (11) is arranged on the lower edge of the diaphragm, the shell gluing part is provided with a lower shell edge bulge gluing part a (12), the shell folding line (8) is used as a symmetry axis, and a lower shell edge bulge gluing part b (15) is arranged on the other side of the shell symmetrically to the lower shell edge bulge gluing part a (13);
after the pole pieces and the diaphragms (1) are assembled, the bulges (11) at the lower edges of all the diaphragms are sewn tightly by using insulating threads;
after the battery core and the shell are assembled, the lower edge of the diaphragm is protruded (11), the lower edge of the shell is protruded to be glued with a part a (13), and the lower edge of the shell is protruded to be glued with a part b (15) to be glued with the part b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420581776.2U CN204216116U (en) | 2014-10-10 | 2014-10-10 | A kind of lithium battery effectively preventing pole piece short circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420581776.2U CN204216116U (en) | 2014-10-10 | 2014-10-10 | A kind of lithium battery effectively preventing pole piece short circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204216116U true CN204216116U (en) | 2015-03-18 |
Family
ID=52984763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420581776.2U Expired - Lifetime CN204216116U (en) | 2014-10-10 | 2014-10-10 | A kind of lithium battery effectively preventing pole piece short circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204216116U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244311A (en) * | 2017-07-10 | 2019-01-18 | 宁德新能源科技有限公司 | Battery core and energy storage device |
| CN109244343A (en) * | 2017-07-10 | 2019-01-18 | 宁德新能源科技有限公司 | Battery core and electrochemical appliance |
-
2014
- 2014-10-10 CN CN201420581776.2U patent/CN204216116U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109244311A (en) * | 2017-07-10 | 2019-01-18 | 宁德新能源科技有限公司 | Battery core and energy storage device |
| CN109244343A (en) * | 2017-07-10 | 2019-01-18 | 宁德新能源科技有限公司 | Battery core and electrochemical appliance |
| CN109244343B (en) * | 2017-07-10 | 2021-11-30 | 宁德新能源科技有限公司 | Battery cell and electrochemical device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150318 |