CN208444910U - A kind of cylindrical lithium ion battery center needle that diameter is variable - Google Patents
A kind of cylindrical lithium ion battery center needle that diameter is variable Download PDFInfo
- Publication number
- CN208444910U CN208444910U CN201820429960.3U CN201820429960U CN208444910U CN 208444910 U CN208444910 U CN 208444910U CN 201820429960 U CN201820429960 U CN 201820429960U CN 208444910 U CN208444910 U CN 208444910U
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- Prior art keywords
- diameter
- center needle
- core
- battery
- changeable type
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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
-
- 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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- Cell Electrode Carriers And Collectors (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses the cylindrical lithium ion battery center needle that a kind of diameter can be changed, the material of diameter changeable type center needle is stainless steel, and overall length is the 95%-98% of core overall length；Diameter before insertion is the 65%-75% of core central diameter, and diameter is the 90-100% of core central diameter after expansion；Its wall thickness is 0.1-0.25mm.By the diameter changeable type center needle of new structural design, prevent the problem of original center needle cannot be sufficiently bonded with core centre bore, can have been collapsed to avoid battery portion and fold, improves battery electrical property and security performance.Meanwhile diameter changeable type center needle uses telescopic design, can effectively avoid burrs on edges and the battery internal short-circuit that edge tip is caused.This configuration design is easy to producer's manufacture, advantageously reduces production cost, ensure that the intensity of center needle using reasonable diameter, thickness and material in the design.
Description
Technical field
The utility model relates to cylindrical lithium ion battery technical field, a kind of can be changed more particularly to diameter cylinder lithium from
Sub- battery center needle.
Background technique
With the continuous development of power battery industry, cylindrical battery also welcomes new opportunity.Cylindrical lithium ion battery has
The advantages that energy density per unit volume height, long service life, memory-less effect, it is widely used in the fields such as power battery.Therefore, for
The requirement of this battery security, reliability is also continuously increased.
Currently, cylindrical lithium ion battery available on the market mainly comprises the following steps: by positive active material and
The positive plate of plus plate current-collecting body (aluminium foil) composition；The negative electrode tab being made of negative electrode active material and negative current collector (copper foil)；Phase
Every the diaphragm between positive/negative plate, diaphragm and positive/negative plate are wound into cylindric core together；For loading core and electrolysis
The metal shell of liquid；The insulating trip up and down that will be separated at the top and bottom of core with other conductive materials；For sealed cell and have
There is the assembled battery lid of certain safety guard.There are following three kinds of security risks for the battery of this composition: 1. batteries are more
After secondary charge and discharge cycles process, since the expansion of pole piece can deform at center gap, or even fracture, cause internal short-circuit；2. when volume
When core tension is low or larger using volume dilatation, at core center core can be caused to analyse lithium, led there is a situation where core fold
Cause the problem of cycle performance of battery decline and safety；3. deform at core center gap, battery is by high heat condition
The gas of generation is difficult to exclude from center, will cause safety problem.Currently, the common method to solve the above problems is in core
Insertion center needle part at center gap prevents the deformation and raising security performance of core in these cases.However, center needle
Diameter can be less than core center-hole diameter and facilitate insertion, center needle is in the state not being bonded in core centre bore, cannot
It is substantially prevented from core to collapse and fold, in addition, center needle cannot be sufficiently bonded with core, will lead to battery and internal short-circuit is occurring
When, heat cannot be exported in time and cause safety accident.Thus, the structure of center needle designs the electrical property to cylindrical lithium ion battery
It can be most important with safety.
Summary of the invention
For above-mentioned the technical problems existing in the prior art, can be changed the purpose of the utility model is to provide a kind of diameter
Cylindrical lithium ion battery center needle.
To realize the purpose of this utility model, the utility model is provided in a kind of variable cylindrical lithium ion battery of diameter
Heart needle, the material of diameter changeable type center needle are stainless steel, and overall length is the 95%-98% of core overall length；Before insertion
Diameter is the 65%-75% of core central diameter, and diameter is the 90-100% of core central diameter after expansion；Its wall thickness is 0.1-
0.25mm。
Compared with prior art, the beneficial effects of the utility model are, by the diameter changeable type of new structural design
Heart needle has prevented the problem of original center needle cannot be sufficiently bonded with core centre bore, can collapse to avoid battery portion and pleat
Wrinkle improves battery electrical property and security performance.Meanwhile diameter changeable type center needle uses telescopic design, can effectively avoid side
The battery internal short-circuit that echinid thorn and edge tip are caused.This configuration design is easy to producer's manufacture, advantageously reduces and is produced into
This, ensure that the intensity of center needle using reasonable diameter, thickness and material in the design.
Detailed description of the invention
Fig. 1 show the section structure diagram of the application；
Fig. 2 show the schematic view of facade structure of the application；
Fig. 3 show original center needle CT scan schematic diagram；
Fig. 4 show the application center needle CT scan schematic diagram；
Fig. 5 show the utility model effect diagram；
Specific embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that this place
The specific embodiment of description is only used to explain the utility model, is not used to limit the utility model.
It should be noted that " connection " described herein and the word for expressing " connection ", as " being connected ",
" connected " etc. had both included that a certain component is directly connected to another component, and had also included that a certain component passes through other component and another portion
Part is connected.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As Figure 1-Figure 2, the utility model is the diameter changeable type center needle by new structural design, has prevented original
There is the problem of center needle cannot be sufficiently bonded with core centre bore, can be collapsed to avoid battery portion and fold, raising battery are electric
Performance and security performance.Meanwhile diameter changeable type center needle can effectively avoid burrs on edges and edge using telescopic design
The battery internal short-circuit that tip is caused.This configuration design is easy to producer's manufacture, advantageously reduces production cost, uses in the design
Reasonable diameter, thickness and material ensure that the intensity of center needle.
As shown in Figure 3, Figure 4, diameter changeable type center is directed to collapsing for core centre bore and can be effectively improved with fold.
By CT scan comparison diagram, there is fold and collapse phenomenon using original center needle battery core in discovery, using diameter changeable type
The battery of center needle, core central hole site does not occur collapsing and fold, core pole piece structure are in good condition.
Diameter changeable type center needle can be effectively improved core analysis lithium phenomenon, improve battery electrical property and security performance.Pass through
Cathode state judges after comparing cylindrical battery circulation, and core collapses the influence with fold for battery analysis lithium, and discovery uses diameter
The cylindrical battery of changeable type center needle is obviously improved core analysis lithium, while improving the security performance of battery.
The utility model provides a kind of cylindrical lithium ion battery center needle that diameter is variable, diameter changeable type center
The material of needle is stainless steel, and overall length is the 95%-98% of core overall length；Diameter before insertion is core central diameter
65%-75%, diameter is the 90-100% of core central diameter after expansion；Its wall thickness is 0.1-0.25mm.It can be one piece
Stainless steel plate carries out bending, so that its section is helical form, or is ring-type, has elasticity.Fig. 5 show the utility model
Effect diagram；
Its specific installation process are as follows:
The specific adition process of diameter changeable type center needle:
1, by core, bottom spacer is put into battery case；
2, resistance welding negative electrode lug and battery case make its connection；
3, the diameter changeable type center needle on expander is vertically added at core center together, and expansion of pressurizeing
Center needle is set to come into full contact with core interior diaphragm, while expander pressure release is extracted out, at this moment diameter changeable type center needle can strut, and fill
Divide and is contacted with core inner wall；
4, Upper gasket is added, and carries out slot rolling；
5, electrolyte is injected；
6, anode ear and battery cover are welded；
7, it covers battery cover and carries out mechanical sealing.
The above is only the preferred embodiment of the utility model, it is noted that for the general of the art
For logical technical staff, without departing from the principle of this utility model, several improvements and modifications can also be made, these change
It also should be regarded as the protection scope of the utility model into retouching.
Claims (1)
1. a kind of variable cylindrical lithium ion battery center needle of diameter, which is characterized in that the material of diameter changeable type center needle
Matter is stainless steel, and section is helical form, or is ring-type, has elasticity, and overall length is the 95%-98% of core overall length；
Diameter before insertion is the 65%-75% of core central diameter, and diameter is the 90-100% of core central diameter after expansion；Its wall
Thickness is 0.1-0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820429960.3U CN208444910U (en) | 2018-03-28 | 2018-03-28 | A kind of cylindrical lithium ion battery center needle that diameter is variable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820429960.3U CN208444910U (en) | 2018-03-28 | 2018-03-28 | A kind of cylindrical lithium ion battery center needle that diameter is variable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208444910U true CN208444910U (en) | 2019-01-29 |
Family
ID=65093387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820429960.3U Active CN208444910U (en) | 2018-03-28 | 2018-03-28 | A kind of cylindrical lithium ion battery center needle that diameter is variable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208444910U (en) |
-
2018
- 2018-03-28 CN CN201820429960.3U patent/CN208444910U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230131 Address after: 300457 No. 38, Haitai South Road, Binhai high tech Industrial Development Zone (outer ring), Binhai New Area, Tianjin Patentee after: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. Patentee after: Tianjin Juyuan New Energy Technology Co.,Ltd. Address before: 300384 Tianjin Binhai New Area Binhai high tech Industrial Development Zone (outer ring) 38 Haitai South Road Patentee before: TIANJIN LISHEN BATTERY JOINT-STOCK Co.,Ltd. |
|
| TR01 | Transfer of patent right |