CN203288661U - Cylindrical steel shell lithium ion battery - Google Patents
Cylindrical steel shell lithium ion battery Download PDFInfo
- Publication number
- CN203288661U CN203288661U CN2013202788994U CN201320278899U CN203288661U CN 203288661 U CN203288661 U CN 203288661U CN 2013202788994 U CN2013202788994 U CN 2013202788994U CN 201320278899 U CN201320278899 U CN 201320278899U CN 203288661 U CN203288661 U CN 203288661U
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- Prior art keywords
- battery
- battery cell
- lithium ion
- steel shell
- material layer
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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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Abstract
The utility model relates to the technical field of lithium ion batteries, particularly to a cylindrical steel shell lithium ion battery which comprises a battery steel shell, a battery cell accommodated inside the battery steel shell and electrolyte solution filled into the battery cell, wherein a soft polymer material layer is uniformly coated and brushed on the surface of the battery cell. Through the adoption of the technical scheme, the battery cell can be fixed well, so that the battery cell can effectively inhibit the expansion of an anode during the practical circulating process to maintain an excellent electrochemical interface; besides, the vibration energy during the use of the battery can be absorbed, so as to facilitate alleviating hidden dangers of short circuit and electrode lug twisting off caused by the shaking in the practical transportation and vibration process of the battery cell; moreover, the soft polymer material layer can reduce the pressure and breakage to the battery cell caused by the steel shell with high rigidity, strength and hardness.
Description
Technical field
The utility model relates to technical field of lithium ion, refers in particular to a kind of cylinder type steel case lithium ion battery.
Background technology
Lithium ion battery, as a kind of environment-friendly battery of green, has high-energy-density, and the advantage of high working voltage and long life is widely used in the mobile electric instrument.Cylindrical lithium ion battery generally includes battery container, is contained in battery and the electrolyte that is filled in wherein in battery container, and battery comprises cathode sheet, anode pole piece and a barrier film.
Electric tool is extensive with lithium ion battery market, and it has self special characteristic, requires discharging current large, and power-performance is high.The environment of the actual use of electric tool is harsher simultaneously, and battery is at high temperature, and after the high power charging-discharging circulation, the anode and cathode pole piece, due to the variation of structure, larger expansion occurs, and in pole piece, active material easily peels off, and causes the battery interface good not.In the electric tool practice, oscillation intensity is large, and is very high to the requirement of the Mechanics of Machinery of battery and reliability, therefore electric tool often adopts rigidity intensity and the higher box hat of mechanical strength as the battery shell with lithium ion battery.But in actual shipment or use procedure, the box hat that rigidity intensity is large can produce pressure and destruction in various degree to battery.And the electric tool lithium ion battery of pursuit power density lifting; energy density requires not very high; therefore its battery usually can be smaller; and the specification of box hat is fixing; as 18650,26650 etc., battery there will be at the box hat housing and rocks up and down so; cause battery in transportation, vibration processes inside short circuit hidden danger occurs owing to rocking the lug end or the pole piece that cause.
In sum, necessaryly provide a kind of and both can guarantee mechanical strength, can take into account again and absorb battery superior battery core structure of vibrational energy and maintenance cyclic process interface in transportation and use procedure, to comply with the demand of electric tool with the lithium ion battery development.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of mechanical strength that both can guarantee, can take into account again and absorb the vibrational energy of battery in transportation and use procedure, also can in battery charge and discharge cycles process, keep interface good simultaneously.
In order to solve above-mentioned technical problem, cylindrical battery provided by the utility model, comprise battery steel shell, is contained in battery and the electrolyte that is filled in wherein in battery steel shell, and the battery surface uniform is coated with and is brushed with the soft polymeric material layer.Described soft polymeric material layer is that itself is easily compressed, can reduce pressure and the destruction of box hat rigidity intensity to battery.Soft polymeric material can absorb the energy of battery in use and vibration processes, can help and alleviate battery in transportation, and the hidden danger of vibration processes, solve battery inside owing to rocking the short circuit hidden danger that causes.The material of described soft polymeric material layer can be butadiene-styrene rubber, Kynoar, that the polymer latexs such as alpha-cyano acrylic acid ester, this material require to have is high temperature resistant, the characteristics of shock resistance, anti-vibration, softness etc., and described soft polymeric material layer is the electronic isolation layer.
The thickness of described soft polymeric material layer is 0.5-5.0mm.The soft polymeric material layer thickness can be long-pending according to battery and the actual ratio adjustment of box hat internal volume, to guarantee battery, can be inserted in smoothly box hat as prerequisite.Such battery surface treatment,, because the soft polymeric material layer has elasticity preferably, improved the ability of battery dilation, effectively be suppressed at high temperature, the expansion of high rate cyclic process anode and cathode, thus remain good electrochemical interface, improved cycle performance of battery.
Described soft polymeric material layer is one deck or multilayer.
Described soft polymeric material layer is the electronic isolation layer.
Description of drawings
Fig. 1 is the utility model battery core structure schematic diagram.
Fig. 2 is that the utility model battery core structure scribbles even soft polymeric material layer schematic diagram.
Fig. 3 is that the utility model battery core structure scribbles even soft polymeric material layer vertical view.
Fig. 4 is the utility model lithium-ion battery with steel shell cutaway view.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage are more clear, below in conjunction with the drawings and specific embodiments, it are further elaborated.
Shown in accompanying drawing 1,, by winding method,, having welded current output terminal 2 on the empty metal foil surfaces of anode and cathode pole piece, follow-uply will weld the moon of lug, anode and barrier film are wound into plain battery core 1.
Shown in accompanying drawing 2, at plain battery core 1 surface uniform brushing soft polymeric material layer 3, soft polymeric material layer 3 thickness can adjust according to the diameter of battery actual energy density and battery 1, soft polymeric material layer 3 can for one deck or more than, thickness is 0.5-5.0mm.Be inserted in smoothly box hat 4 with assurance battery 1, make as far as possible the void space between battery 1 and box hat 4 less.
See Fig. 3, consider the practical purpose of soft polymeric material layer 3, the material of soft polymeric material layer 3 can be butadiene-styrene rubber, Kynoar, the characteristics such as that the polymer latexs such as alpha-cyano acrylic acid ester, the material of selection require to have is high temperature resistant, high strength, shock resistance, anti-vibration, softness etc.
As shown in Figure 4, complete the battery 1 of coiling and external coating soft polymeric material layer 3,, by the mode of artificial or machine, insert in box hat 4 housings.By follow-up negative and positive lug and corresponding both positive and negative polarity welding, and to box hat 4, inject electrolyte, through vacuumizing, sealing namely can obtain required cylindrical lithium ion battery.
The certain thickness soft polymeric material layer 3 of the utility model brushing can occupy the clearance spaces in the middle of battery and box hat 4, and fine self-contained battery core 1 effectively suppresses anode and cathode and expands, thereby remains good electrochemical interface.Simultaneously can absorb the energy that battery in use vibrates, avoid battery 1 the short circuit hidden danger that caused lug fractures or other are possible to occur rocking in transportation and actual vibration use procedure.Reduce pressure and the destruction of box hat 4 rigidity intensity to battery, the fail safe that improves battery.
The announcement of book according to the above description, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the utility model is not limited to embodiment disclosed and described above, to modifications and changes more of the present utility model, also should fall in the protection range of claim of the present utility model.In addition, although used some specific terms in the utility model book, these terms just for convenience of description, do not become any restriction to the utility model patent.
Claims (4)
1. a cylinder type steel case lithium ion battery, comprise battery steel shell, is contained in battery and the electrolyte that is filled in wherein in battery steel shell, and it is characterized in that: the battery surface uniform is coated with and is brushed with the soft polymeric material layer.
2. a kind of cylinder type steel case lithium ion battery as claimed in claim 1, it is characterized in that: the thickness of described soft polymeric material layer is 0.5-5.0mm.
3. a kind of cylinder type steel case lithium ion battery as claimed in claim 2, it is characterized in that: described soft polymeric material layer is one deck or multilayer.
4. a kind of cylinder type steel case lithium ion battery as claimed in claim 3, it is characterized in that: described soft polymeric material layer is the electronic isolation layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202788994U CN203288661U (en) | 2013-05-21 | 2013-05-21 | Cylindrical steel shell lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202788994U CN203288661U (en) | 2013-05-21 | 2013-05-21 | Cylindrical steel shell lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203288661U true CN203288661U (en) | 2013-11-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202788994U Expired - Lifetime CN203288661U (en) | 2013-05-21 | 2013-05-21 | Cylindrical steel shell lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203288661U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261715A (en) * | 2015-11-07 | 2016-01-20 | 合肥国轩高科动力能源有限公司 | Cylindrical battery shell |
| CN105552252A (en) * | 2015-12-11 | 2016-05-04 | 中国电子科技集团公司第十八研究所 | Long-storage lifetime lithium-ion battery and treatment method therefor |
| CN110661009A (en) * | 2019-10-08 | 2020-01-07 | 中国电子科技集团公司第十八研究所 | Self-limiting expansion inhibition structure of cylindrical lithium carbon fluoride battery |
-
2013
- 2013-05-21 CN CN2013202788994U patent/CN203288661U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105261715A (en) * | 2015-11-07 | 2016-01-20 | 合肥国轩高科动力能源有限公司 | Cylindrical battery shell |
| CN105552252A (en) * | 2015-12-11 | 2016-05-04 | 中国电子科技集团公司第十八研究所 | Long-storage lifetime lithium-ion battery and treatment method therefor |
| CN110661009A (en) * | 2019-10-08 | 2020-01-07 | 中国电子科技集团公司第十八研究所 | Self-limiting expansion inhibition structure of cylindrical lithium carbon fluoride battery |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |