CN209472067U - A kind of lamination type electric pool structure - Google Patents
A kind of lamination type electric pool structure Download PDFInfo
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- CN209472067U CN209472067U CN201920210243.6U CN201920210243U CN209472067U CN 209472067 U CN209472067 U CN 209472067U CN 201920210243 U CN201920210243 U CN 201920210243U CN 209472067 U CN209472067 U CN 209472067U
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- negative electrode
- edge
- electrode tab
- anode ear
- diaphragm
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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
- 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
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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 discloses a kind of lamination type electric pool structure, including successively folding the positive plate, diaphragm and the negative electrode tab that set, anode ear is provided on positive plate, negative electrode lug is provided in negative electrode tab, the edge of the diaphragm of negative electrode lug side is d1 at a distance from the edge of negative electrode tab, the edge of the positive plate of negative electrode lug side is d2 at a distance from the edge of negative electrode tab, and the edge of the diaphragm of anode ear side is d3, d3 >=d1+d2 at a distance from the edge of negative electrode tab.When can prevent battery temperature from increasing, the diaphragm of anode ear side is heat-shrinked, so that anode ear is directly contacted with negative electrode tab, inside battery anode ear and the phenomenon of negative electrode tab short circuit is avoided to occur, the effective safety in utilization for improving battery.
Description
Technical field
The utility model relates to battery structure technical field more particularly to a kind of lamination type electric pool structures.
Background technique
Thermal runaway is to influence lithium ion battery using safe arch-criminal, in the prior art on how to improving lithium ion
The technology of battery security has very much.Wherein most is for positive electrode, negative electrode material, electrolyte and the big main material of diaphragm four
The means such as coating are doped, are modified or processed to improve battery core security performance.However the variation of main material will certainly cause battery core
Change, adjustment and a large amount of reliability demonstration of processing procedure and performance, need to spend a large amount of human and material resources and time.
The initiation reason of the thermal runaway of battery be mostly battery working environment or under the conditions of heat production it is accumulative, heated point of electrolyte
Solution, big volume production gas, diaphragm heat shrinkable, causes positive and negative anodes short-circuit in addition.In the prior art by improving diaphragm to cathode, cathode
Overhang (diaphragm has more the part except positive and negative anodes pole piece) to anode in length and width direction, or cathode is improved to just
The capacity excess ratio of pole, the security performance of Lai Tisheng battery.However, these ways and means are battery core entirety, it is not needle
It takes measures to the weak spot of core strueture design, in addition due to the requirement of mass energy density and volume energy density, design
With significant limitation, often run in the opposite direction with safe design.
Utility model content
The purpose of the utility model embodiment is: a kind of lamination type electric pool structure is provided, it is structurally reasonable, and it can be effective
Raising battery safety in utilization.
In order to achieve the above object, the utility model uses following technical scheme:
A kind of lamination type electric pool structure is provided, including successively folding the positive plate, diaphragm and the negative electrode tab that set, on the positive plate
It is provided with anode ear, negative electrode lug is provided in the negative electrode tab, the edge of the diaphragm of the negative electrode lug side is born with described
The distance at the edge of pole piece is d1, and the edge of the positive plate of the negative electrode lug side is at a distance from the edge of the negative electrode tab
For d2, the edge of the diaphragm of the anode ear side is d3, d3 >=d1+d2 at a distance from the edge of the negative electrode tab.
As a preferred technical solution of the utility model, the anode ear and the negative electrode lug are located at described
The opposite two sides of positive plate.
As a preferred technical solution of the utility model, the anode ear and the negative electrode lug are located at the anode
The identical side of piece, the d3 are equal to the d1+d2.
As a preferred technical solution of the utility model, the side of the not set anode ear and the negative electrode lug
Face, the edge of the diaphragm are not less than the d3 with the edge distance d4 of positive plate.
As a preferred technical solution of the utility model, it is provided between the anode ear and the negative electrode tab absolutely
Edge layer.
As a preferred technical solution of the utility model, the insulating layer is set to the anode ear and bears with described
The position of pole piece face.
As a preferred technical solution of the utility model, the insulating layer is coated on exhausted on the anode ear
Edge coating or the insulating tape being attached on the anode ear.
As a preferred technical solution of the utility model, the length of the insulating layer is not less than the anode ear one
The edge of the positive plate of side is at a distance from the edge of the negative electrode tab, no more than the positive plate of the anode ear side
Edge at a distance from the edge of the diaphragm.
As a preferred technical solution of the utility model, the area of the positive plate is less than or equal to the cathode
The area of piece.
As a preferred technical solution of the utility model, the area of the positive plate is less than the face of the negative electrode tab
Product, and the edge of the positive plate is respectively positioned on center side of the edge close to the negative electrode tab of the negative electrode tab.
The utility model has the following beneficial effects: by by the edge and cathode of the diaphragm of the anode ear side of laminated battery plate
The distance d3 setting at the edge of piece be greater than or equal to the edge distance d1 of edge and the negative electrode tab of the diaphragm of negative electrode lug side with
The edge of positive plate at a distance from the edge of negative electrode tab the sum of for d2, when can prevent battery temperature from increasing, anode ear side every
, there is the phenomenon that anode ear is contacted with negative electrode tab in the reserved deficiency of film thermal shrinking quantity, so as to avoid inside battery anode ear and bears
The phenomenon that pole piece contact short circuit, occurs, the effective safety in utilization for improving battery.
Detailed description of the invention
The utility model is described in further detail below according to drawings and examples.
Fig. 1 is the structural schematic diagram of laminated battery plate described in an embodiment of the present invention.
Fig. 2 is the structural schematic diagram of laminated battery plate described in another embodiment of the utility model.
In figure:
1, positive plate；2, diaphragm；3, negative electrode tab；4, anode ear；5, negative electrode lug；6, insulating layer.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer,
It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality
Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention,
It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts
The range of type protection.
In the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " Gu
It is fixed " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.For the ordinary skill in the art, it can be managed with concrete condition
Solve the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it
"lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to
Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above "
One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special
Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only
Indicate that first feature horizontal height is less than second feature.
By thermal runaway experiment it is found that battery is in thermal runaway stage, inside battery maximum temperature≤150 DEG C, in this temperature
Deformation occurs but undissolved for lower diaphragm plate, while positive electrode also a large amount of decomposition.But in existing laminated batteries, in lamination
On the side of the not set tab of battery, positive/negative plate in the complete situation of diaphragm, only when diaphragm retracts extremely cannot completely every
It just will appear contact short circuit phenomenon in the case where from positive/negative plate, but in the design of existing battery structure, exceeding for diaphragm is positive and negative
The design length of the part of pole piece can guarantee diaphragm shrinkage be less than the distance between diaphragm edge and positive/negative plate, i.e., on
Stating situation is not in.And in the side for being provided with negative electrode lug, since the area of positive plate is typically less than or equal to negative electrode tab
Area, diaphragm retracts distance require more than the distance between diaphragm edge and the positive/negative plate side of putting will appear positive/negative plate contact it is short
Road phenomenon, but in the design of existing battery structure, the design length of the part beyond positive/negative plate of diaphragm can guarantee diaphragm
Shrinkage be less than the distance between diaphragm edge and positive/negative plate, i.e. above situation is not in.It is being provided with anode ear
Side since the area of positive plate is less than or equal to negative electrode tab, while being also welded with conductive anode ear, works as diaphragm on positive plate
When contraction, it will the case where anode ear first touches negative electrode lug occur, i.e., in existing battery structure, diaphragm exceeds positive/negative plate
The design length of part can guarantee the contact that the shrinkage of diaphragm does not ensure that anode ear with negative electrode tab, diaphragm retracts
When, it is relatively easy to the phenomenon that anode ear and negative electrode tab contact short circuit occur.This point can in a large amount of anatomic shunt thermal runaway battery core
Be verified: thermal runaway is since anode ear and negative electrode tab contact short circuit cause.
As shown in Fig. 1 to 2, in this present embodiment, a kind of lamination type electric pool structure described in the utility model, including successively
Positive plate 1, diaphragm 2 and the negative electrode tab 3 set is folded, anode ear 4 is provided on positive plate 1, negative electrode lug 5 is provided in negative electrode tab 3, is born
The edge of the diaphragm 2 of 5 side of tab at a distance from the edge of negative electrode tab 3 be d1, the edge of the positive plate 1 of 5 side of negative electrode lug with
The distance at the edge of negative electrode tab 3 is d2, and the edge of the diaphragm 2 of 4 side of anode ear is d3 at a distance from the edge of negative electrode tab 3, d3 >
=d1+d2.
By the way that the edge of the diaphragm 2 of 4 side of anode ear of laminated battery plate and the edge distance d3 of negative electrode tab 3 are arranged
More than or equal to the edge distance d1 of edge and the negative electrode tab 3 of the diaphragm 2 of 5 side of negative electrode lug and the edge of positive plate 1 and negative
The distance at the edge of pole piece 3 is the sum of d2, and when can prevent battery temperature from increasing, 2 thermal shrinking quantity of diaphragm of 4 side of anode ear is reserved
, there is anode ear 4 and the phenomenon that negative electrode tab 3 contacts in deficiency, and contacts so as to avoid inside battery anode ear 4 with negative electrode tab 3 short
The phenomenon that road, occurs, the effective safety in utilization for improving battery.
In the utility model embodiment, anode ear 4 and negative electrode lug 5 are located at the opposite two sides of positive plate 1, and do not set
The side of anode ear 4 and negative electrode lug 5 is set, the edge of diaphragm 2 is not less than d3 with the edge distance d4 of positive plate 1.
At anode ear 4 and the negative electrode lug 5 of the battery two sides that be respectively arranged at battery opposite, by by 4 side of anode ear
2 edge of diaphragm and the setting of the distance between negative electrode tab 3 be greater than the diaphragm 2 of negative electrode lug 5 and the side of other not set tabs most
Big shrinkable distance, can prevent occurring short circuit phenomenon at first in 4 side of anode ear, to targetedly change the inside of battery
Structure, the effective safety in utilization for improving battery.Simultaneously by targetedly adjusting 2 length of diaphragm, can effectively save
Diaphragm material, it is ensured that at a certain temperature, the maximum collapse amount of diaphragm 2 is less than diaphragm 2 and positive/negative plate 3 and is provided with just
The diaphragm 2 of 4 side of tab effectively avoids the appearance of short circuit phenomenon at a distance from negative electrode tab 3.
The thermal decomposition temperature of the above-mentioned optional diaphragm 2 of certain temperature, i.e., maximum limitation avoid being brought since diaphragm 2 is shunk
Internal short-circuit of battery the phenomenon that occur.
In the other embodiments of the utility model, anode ear 4 and negative electrode lug 5 may be additionally located at the identical side of battery,
The sum of d3, that is, d1 and d2 at this time, i.e. d3 are equal to d1+d2, and its excess-three side of not set tab at this time, the edge of diaphragm 2
It is not less than d3 with the edge distance d4 of positive plate 1.
In the utility model embodiment, insulating layer 6 is provided between the anode ear 4 and the negative electrode tab 3.
By the way that insulating layer 6 is arranged between anode ear 4 and negative electrode tab 3, anode ear 4 and negative electrode tab 3 can be further avoided
Contact.At this point, the structure for battery designs, it can be by the edge at the edge of the diaphragm 2 of four sides of battery and positive plate 1
Distance setting it is equal.
In a preferred embodiment, insulating layer 6 is set to the position of anode ear 4 Yu 3 face of negative electrode tab.I.e. only negative
Insulating layer 6 is set at the position that pole piece 3 may be contacted with anode ear 4, this structure can reduce the invalid arrangement of insulating layer 6, reduce
The materials'use of insulating layer 6 plays the role of saving material.
In a specific embodiment, insulating layer 6 is coated on the insulating coating on anode ear 4 or negative electrode tab 3.
In other embodiments, insulating layer 6 can also be the insulating tape being attached in anode ear 4 or negative electrode tab 3.
Further, the length of insulating layer not less than anode ear side positive plate edge and negative electrode tab edge away from
From, no more than anode ear side the edge of positive plate at a distance from the edge of diaphragm.The length of above-mentioned insulating layer is insulating layer
Length on the length direction of anode ear.It is understood that in the present invention, the setting width of insulating layer must not be small
In the width of anode ear, no person will cannot play the purpose for completely cutting off anode ear and contacting with negative electrode tab.
In the present invention, the specific material of insulating layer 6 and setting form are not defined, as long as can rise
To the scheme that the position of anode ear 4 and 3 face of negative electrode tab is played to insulation.
In the above embodiments, the area of positive plate 1 is less than or equal to the area of negative electrode tab 3.
Further, the area of positive plate 1 is less than the area of negative electrode tab 3, and the edge of positive plate 1 is respectively positioned on negative electrode tab 3
Edge close to the center side of negative electrode tab 3.
It is appreciated that the scheme provided in the utility model can be applicable to 3 area of negative electrode tab greater than positive plate 1
The case where area, only needs to guarantee the edge of the diaphragm 2 of 4 side of anode ear and the edge distance d1 ' of positive plate 1 and anode at this time
The sum of the edge of the positive plate 1 of 4 side of ear and the edge distance d2 ' of negative electrode tab 3 are less than or equal to the diaphragm of 5 side of negative electrode lug
The edge distance d3 ' at 2 edge and positive plate 1.Specific set-up mode can refer to negative electrode tab 3 in the various embodiments described above
The case where more than or equal to positive plate 1.
In the description of this article, it is to be understood that term " on ", "lower", " right side ", etc. orientation or positional relationships be based on
Orientation or positional relationship shown in the drawings is merely for convenience of description and simplification and operates, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.In addition, term " first ", " second ", are only used to distinguish between description, have no special meaning.
In the description of this specification, the description of reference term " embodiment ", " example " etc. means to combine the embodiment
Or example particular features, structures, materials, or characteristics described are contained at least one embodiment or example of the utility model
In.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the embodiments can also be appropriately combined, and forming those skilled in the art can
With the other embodiments of understanding.
Technical principle of the utility model has been described above with reference to specific embodiments.These descriptions are intended merely to explain this reality
With novel principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.Based on the explanation herein,
Those skilled in the art, which does not need to pay for creative labor, can associate with other specific implementation modes of this utility model,
These modes are fallen within the protection scope of the utility model.
Claims (10)
1. a kind of lamination type electric pool structure is provided on the positive plate including successively folding the positive plate, diaphragm and the negative electrode tab that set
Anode ear is provided with negative electrode lug in the negative electrode tab, which is characterized in that the edge of the diaphragm of the negative electrode lug side and institute
The distance for stating the edge of negative electrode tab is d1, the edge at the edge and negative electrode tab of the positive plate of the negative electrode lug side
Distance is d2, and the edge of the diaphragm of the anode ear side is d3, d3 >=d1+ at a distance from the edge of the negative electrode tab
d2。
2. lamination type electric pool structure according to claim 1, which is characterized in that the anode ear and negative electrode lug difference
The two sides opposite positioned at the positive plate.
3. lamination type electric pool structure according to claim 1, which is characterized in that the anode ear and the negative electrode lug are located at
The identical side of the positive plate, the d3 are equal to the d1+d2.
4. lamination type electric pool structure according to claim 1, which is characterized in that the not set anode ear and the cathode
The side of ear, the edge of the diaphragm are not less than the d3 with the edge distance d4 of positive plate.
5. lamination type electric pool structure according to claim 1, which is characterized in that between the anode ear and the negative electrode tab
It is provided with insulating layer.
6. lamination type electric pool structure according to claim 5, which is characterized in that the insulating layer is set to the anode ear
With the position of the negative electrode tab face.
7. lamination type electric pool structure according to claim 5, which is characterized in that the insulating layer is coated on the anode
Insulating coating on ear or the insulating tape being attached on the anode ear.
8. lamination type electric pool structure according to claim 5, which is characterized in that the length of the insulating layer is not less than described
The edge of the positive plate of anode ear side is at a distance from the edge of the negative electrode tab, no more than the institute of the anode ear side
The edge of positive plate is stated at a distance from the edge of the diaphragm.
9. lamination type electric pool structure according to claim 1, which is characterized in that the area of the positive plate is less than or equal to
The area of the negative electrode tab.
10. lamination type electric pool structure according to claim 9, which is characterized in that the area of the positive plate is less than described
The area of negative electrode tab, and the edge of the positive plate is respectively positioned on the edge of the negative electrode tab close to the center of the negative electrode tab one
Side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920210243.6U CN209472067U (en) | 2019-02-19 | 2019-02-19 | A kind of lamination type electric pool structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920210243.6U CN209472067U (en) | 2019-02-19 | 2019-02-19 | A kind of lamination type electric pool structure |
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| Publication Number | Publication Date |
|---|---|
| CN209472067U true CN209472067U (en) | 2019-10-08 |
Family
ID=68094906
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920210243.6U Active CN209472067U (en) | 2019-02-19 | 2019-02-19 | A kind of lamination type electric pool structure |
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| Country | Link |
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| CN (1) | CN209472067U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497749A (en) * | 2022-02-11 | 2022-05-13 | 上海兰钧新能源科技有限公司 | Laminated cell structure and laminated battery |
| CN115312988A (en) * | 2022-09-08 | 2022-11-08 | 珠海冠宇电池股份有限公司 | Multi-tab pole piece, multi-tab battery cell and battery |
-
2019
- 2019-02-19 CN CN201920210243.6U patent/CN209472067U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114497749A (en) * | 2022-02-11 | 2022-05-13 | 上海兰钧新能源科技有限公司 | Laminated cell structure and laminated battery |
| CN114497749B (en) * | 2022-02-11 | 2024-01-19 | 上海兰钧新能源科技有限公司 | Lamination cell structure and lamination battery |
| CN115312988A (en) * | 2022-09-08 | 2022-11-08 | 珠海冠宇电池股份有限公司 | Multi-tab pole piece, multi-tab battery cell and battery |
| CN115312988B (en) * | 2022-09-08 | 2023-06-06 | 珠海冠宇电池股份有限公司 | Multipolar ear pole piece, multipolar ear cell and battery |
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