CN209357812U - A kind of electric core structure of lithium battery that can improve heavy impact and the lithium battery including the core strueture - Google Patents
A kind of electric core structure of lithium battery that can improve heavy impact and the lithium battery including the core strueture Download PDFInfo
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- CN209357812U CN209357812U CN201822246308.0U CN201822246308U CN209357812U CN 209357812 U CN209357812 U CN 209357812U CN 201822246308 U CN201822246308 U CN 201822246308U CN 209357812 U CN209357812 U CN 209357812U
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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 relates to field of lithium ion battery, in particular to a kind of electric core structure of lithium battery that can improve heavy impact and the lithium battery including the core strueture, include core, terminate glue-line, positive plate and negative electrode tab, the core includes polytetrafluoroethylplastic plastic volume needle, diaphragm and copper foil layer, the polytetrafluoroethylplastic plastic is rolled up needle outsourcing by the diaphragm, the copper foil layer is by the diaphragm outsourcing, its winding is fixed in the outside that the termination glue-line is wound in the copper foil layer, the positive plate is connected to the upper end of core axial direction, the negative electrode tab is connected to the lower end of core axial direction, the core is placed in the shell.The support force of core can be improved using polytetrafluoroethylplastic plastic volume needle for the utility model, can also alleviate battery because of internal stress caused by heavy impact, to reduce the probability of core sliver picking；In addition the shortcomings that conventional membrane is ruptured because of heavy impact is compensated for using the coated insulation film of high strength high extensibility, internal short-circuit of battery can be prevented from source.
Description
Technical field
The utility model relates to field of lithium ion battery, in particular to a kind of lithium battery electric core knot that can improve heavy impact
Structure and lithium battery including the core strueture.
Background technique
With the development of science and technology and technology, the development and utilization of the energy becomes China or even global important research class
Topic.The non-renewable energy such as traditional coal and petroleum are existed in slowly exhaustion, the exploitation of the energy of new generation and its using gesture
It must go.Secondary lithium battery becomes the bellwether of today's society energy storage industry as energy-storing container of new generation.Lithium-ion electric
Pond has many advantages, such as high capacity, high-voltage discharge platform, high power, high-energy density, low self-discharge and memory-less effect, by
The favor of the numerous researchers in the world also becomes the clean energy resource of new generation for dominating world today's energy storage industry.
The development of lithium ion battery can be traced in the early 1990s, first piece of lithium developing of Japanese Sony Corporation from
Sub- battery is that the boundary line for dividing new energy reservoir and traditional energy reservoir and the world enter the mark in new energy epoch
Note.Close to development in 30 years, lithium ion battery was had been widely used, such as: new-energy automobile, electric car, electronic
Tool and 3C energy-storage battery etc..To sum up, the industry for being related to energy storage all be unable to do without lithium ion battery.Lithium battery just
In the development of negative electrode material, what positive electrode realized volume production is divided into five kinds: LiMn2O4, cobalt acid lithium, LiFePO4, lithium nickelate and
Nickle cobalt lithium manganate；Cathode is mainly based on graphite material, in addition, silicon carbon material has very high specific capacity, it will be next
For the substitute of lithium ion battery negative material.
With the development of lithium battery applications, the simple application by is by now in the side such as new-energy automobile and electric tool
The application in face realizes the transformation of large span.But there is also inevitable safety issue while practical application,
If battery catches fire explodes, such issues that be also to cause the important topic discussed warmly of society.Each related research institutes in the world never stop
It crosses to the research in terms of lithium ion battery safety performance.In terms of the present utility model is mainly for lithium ion battery heavy impact
Improvement.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, can improve the purpose of this utility model is to provide a kind of
The electric core structure of lithium battery of heavy impact can be improved the support force of core using polytetrafluoroethylplastic plastic volume needle, while can also delay
Electrolytic cell is because of internal stress caused by heavy impact, to reduce the probability of core sliver picking；In addition, the utility model uses
The coated insulation film of high strength high extensibility compensates for the shortcomings that conventional membrane is ruptured because of heavy impact, can prevent from source
Only internal short-circuit of battery.
The another object of the utility model is a kind of lithium ion battery that can improve heavy impact, and the battery is because using upper
Battery can be alleviated because of internal stress caused by heavy impact by stating battery core, to reduce the probability of core sliver picking.
The purpose of this utility model is achieved through the following technical solutions: a kind of lithium battery electric core knot that can improve heavy impact
Structure comprising core, terminates glue-line, positive plate and negative electrode tab, and the core includes polytetrafluoroethylplastic plastic volume needle, diaphragm and copper foil
The polytetrafluoroethylplastic plastic is rolled up needle outsourcing by layer, the diaphragm, and the copper foil layer is by the diaphragm outsourcing, the termination glue-line
Its winding is fixed in the outside for being wound in the copper foil layer, and the positive plate is connected to the upper end of the core axial direction, institute
The lower end that negative electrode tab is connected to the core axial direction is stated, the core is placed in the shell.
Further, the diaphragm is ceramic isolation film, the ceramics isolation film with a thickness of 16-20 μm.
Further, the isolation film includes first coating and second coating.
Further, the first coating is PVDF coating, and the second coating is Al2O3Coating.
Further, the first coating is with a thickness of 0.1-2.0 μm, and the second coating is with a thickness of 0.1-2.0 μm.
Further, the termination glue-line includes spaced first glue-line, the second glue-line and third glue-line, and described
One glue-line, the second glue-line and third glue-line are wound in the top on the outside of the copper foil layer, the middle part on the outside of copper foil layer and copper respectively
Lower part on the outside of layers of foil, the width of the first glue-line, the second glue-line and third glue-line are 8-14mm.
Further, the core winding into shell assembly is than being 85-95%.
Further, the polytetrafluoroethylene (PTFE) volume needle is cylindrical, and the lower end surface of the polytetrafluoroethylene (PTFE) volume needle is downwardly convex
It stretches in arcuation.
A kind of lithium ion battery improving heavy impact, the lithium ion battery include the lithium battery electric core knot
Structure.
Further, the lithium ion battery is cylindrical shape, and base diameter 15-25mm is highly 55-75mm.
The utility model has the beneficial effects that: core can be improved using polytetrafluoroethylplastic plastic volume needle in the utility model
Support force, while can also alleviate battery because of internal stress caused by heavy impact, to reduce the probability of core sliver picking；This
Outside, the coated insulation film that the utility model uses high strength high extensibility compensates for what conventional membrane was ruptured by heavy impact
Disadvantage can prevent internal short-circuit of battery from source.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the utility model core；
Fig. 2 is the outside schematic diagram of the utility model core；
Fig. 3 is the perspective view of the utility model lithium battery.
Appended drawing reference are as follows: 1- terminates glue-line, 2- diaphragm, 3- copper foil layer, 4- polytetrafluoroethylplastic plastic and rolls up needle.
Specific embodiment
For the ease of the understanding of those skilled in the art, below with reference to examples and drawings 1-3 to the utility model make into
The explanation of one step, the content that embodiment refers to not are the restriction to the utility model.
See that Fig. 1-3, a kind of electric core structure of lithium battery that can improve heavy impact comprising core and terminate glue-line 1, the volume
Core includes polytetrafluoroethylplastic plastic volume needle 4, diaphragm 2, copper foil layer 3, positive plate and negative electrode tab, and the diaphragm 2 is by the polytetrafluoro
Vinyl plastics roll up 4 outsourcing of needle, and 2 outsourcing of diaphragm, the termination glue-line 1 are wound in the copper foil layer 3 by the copper foil layer 3 outside
Its winding is fixed in outside, and the positive plate is connected to the upper end of the core axial direction, and the negative electrode tab is connected to described
The lower end of the core axial direction；The core winding into shell assembly is than being 85-95%.The diaphragm 2 is coated on polytetrafluoroethylplastic plastic
The outer side wall surface of needle 4 is rolled up, the copper foil layer 3 is coated on the lateral wall outer surface of diaphragm 2.Further, the diaphragm 2 is wound
In the circle of outer side wall surface one or multi-turn of polytetrafluoroethylplastic plastic volume needle 4.Polytetrafluoroethylplastic plastic rolls up the upper and lower ends of needle 4 not
There is the cladding of diaphragm 2, the upper and lower ends of diaphragm 2 do not have 3 diaphragm 2 of copper foil layer cladding.
The lithium battery structure of the utility model is simple and novel, and rolling up needle 4 by polytetrafluoroethylplastic plastic can be improved the branch of core
Support force, while can also alleviate battery because of internal stress caused by heavy impact, to reduce the probability of core sliver picking；And institute
Copper foil layer 3 is stated with good electric conductivity, protective oxide layer can be formed into, and 3 quality of copper foil layer is softer is conducive to bond, at this
The conductivity of the pole plate of lithium battery can be promoted in utility model, while being played a very good protection to lithium battery.
In the present embodiment, the diaphragm 2 is ceramic isolation film, the ceramics isolation film with a thickness of 16-20 μm；Further
, the intensity 2000-2200kgf/cm of the diaphragm 22, elongation 100-180%.Further, the isolation film 2 wraps
Include the first PVDF coating with a thickness of 0.1-2.0 μm and the 2nd Al with a thickness of 0.1-2.0 μm2O3Coating.
The ceramic isolation film used in the present embodiment has organic solvent-resistant, draws high intensity height, puncture intensity height, imbibition rate
High advantage can make up the shortcomings that conventional membrane 2 is ruptured because of heavy impact, and internal short-circuit of battery is prevented from source, and
Al2O3With very high thermal stability and chemical inertness, the positive and negative electrode point of battery can be well isolated from, prevent the two poles of the earth contact and
Short circuit, furthermore electrolyte ion percent of pass is high.
In the present embodiment, the termination glue-line 1 includes spaced first glue-line, the second glue-line and third glue-line, institute
It states the first glue-line, the second glue-line and third glue-line and is wound in the top in 3 outside of the copper foil layer respectively, in 3 outside of copper foil layer
The lower part in 3 outside of portion and copper foil layer, the width of the first glue-line, the second glue-line and third glue-line is 8-14mm., in the present embodiment
The termination glue-line 1, which can well insulate core, to be fixed, and prevents lithium battery short-circuit.
In the present embodiment, the lithium ion battery is cylindrical shape, and base diameter 15-25mm is highly 55-
75mm；The polytetrafluoroethylene (PTFE) volume 4 lower end of needle is hemispherical, upper end is planar shaped；Further, the polytetrafluoroethylene (PTFE) volume
The length of needle 4 is 55-75mm, diameter 3-4mm.
Two embodiments provided by the utility model are prepared into battery and carry out forming and capacity dividing, according to national standard GB 31241-
2014 battery is expired fill after carry out heavy impact test result it is as shown in table 1:
Table 1:
| Test number | Number on fire | Whether pass through | |
| Originally example is applied | 10 | 0 | Pass through |
It may know that according to 1 data of table, by a kind of lithium battery electric core knot that can improve heavy impact provided by the utility model
Lithium battery made from structure can illustrate a kind of lithium battery that can improve heavy impact provided by the utility model by heavy impact
Battery made from cored structure can effectively improve the security performance of lithium ion battery, have biggish meaning for the application of lithium battery
Justice is especially applied in the most complicated, the highest new-energy automobile of technology, is greatly improved the security performance of automobile
Above-described embodiment is the preferable implementation of the utility model, and in addition to this, the utility model can be with other sides
Formula realizes that any obvious replacement is in the protection model of the utility model without departing from the concept of the premise utility
Within enclosing.
Claims (10)
1. a kind of electric core structure of lithium battery that can improve heavy impact, including shell, it is characterised in that: include core, stop adhesive
Layer, positive plate and negative electrode tab, the core include polytetrafluoroethylplastic plastic volume needle, diaphragm and copper foil layer, and the diaphragm will be described
Polytetrafluoroethylplastic plastic rolls up needle outsourcing, and the diaphragm outsourcing, the termination glue-line are wound in the copper foil layer by the copper foil layer
Outside its winding is fixed, the positive plate is connected to the upper end of the core axial direction, and the negative electrode tab is connected to the volume
Mandrel to lower end, the core is placed in the shell.
2. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 1, it is characterised in that: it is described every
Film is ceramic isolation film, the ceramics isolation film with a thickness of 16-20 μm.
3. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 2, it is characterised in that: it is described every
It include first coating and second coating from film.
4. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 3, it is characterised in that: described
One coating is PVDF coating, and the second coating is Al2O3Coating.
5. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 4, it is characterised in that: described
One coating layer thickness is 0.1-2.0 μm, and the second coating is with a thickness of 0.1-2.0 μm.
6. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 1, it is characterised in that: the end
Only glue-line includes spaced first glue-line, the second glue-line and third glue-line, first glue-line, the second glue-line and third glue
Layer is wound in the top on the outside of the copper foil layer, the middle part on the outside of copper foil layer and the lower part on the outside of copper foil layer respectively, the first glue-line,
The width of second glue-line and third glue-line is 8-14mm.
7. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 1, it is characterised in that: the volume
Core enters shell assembly than being 85-95%.
8. a kind of electric core structure of lithium battery that can improve heavy impact according to claim 1, it is characterised in that: described poly-
Ptfe plastic volume needle is cylindrical, and the lower end surface of the polytetrafluoroethylplastic plastic volume needle protrudes out downwards in arcuation.
9. the lithium ion battery that one kind can improve heavy impact, it is characterised in that: the lithium ion battery includes claim 1 institute
The electric core structure of lithium battery stated.
10. the lithium ion battery that one kind according to claim 9 can improve heavy impact, it is characterised in that: the lithium
Ion battery is cylindrical shape, and base diameter 15-25mm is highly 55-75mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822246308.0U CN209357812U (en) | 2018-12-28 | 2018-12-28 | A kind of electric core structure of lithium battery that can improve heavy impact and the lithium battery including the core strueture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822246308.0U CN209357812U (en) | 2018-12-28 | 2018-12-28 | A kind of electric core structure of lithium battery that can improve heavy impact and the lithium battery including the core strueture |
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| CN209357812U true CN209357812U (en) | 2019-09-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112133846A (en) * | 2020-09-11 | 2020-12-25 | 东莞市创明电池技术有限公司 | Secondary battery and method for manufacturing the same |
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2018
- 2018-12-28 CN CN201822246308.0U patent/CN209357812U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112133846A (en) * | 2020-09-11 | 2020-12-25 | 东莞市创明电池技术有限公司 | Secondary battery and method for manufacturing the same |
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