CN202495541U - Cylindrical lithium ion battery - Google Patents
Cylindrical lithium ion battery Download PDFInfo
- Publication number
- CN202495541U CN202495541U CN2012200894369U CN201220089436U CN202495541U CN 202495541 U CN202495541 U CN 202495541U CN 2012200894369 U CN2012200894369 U CN 2012200894369U CN 201220089436 U CN201220089436 U CN 201220089436U CN 202495541 U CN202495541 U CN 202495541U
- Authority
- CN
- China
- Prior art keywords
- battery
- lithium ion
- cylindrical lithium
- pole piece
- piece group
- 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
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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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- Connection Of Batteries Or Terminals (AREA)
- Primary Cells (AREA)
Abstract
The utility model belongs to the technical field of lithium ion batteries and particularly relates to a cylindrical lithium ion battery. The cylindrical lithium ion battery comprises a battery shell, a pole piece group contained in the battery shell, electrolyte filled in the battery shell, and a battery cap assembled on the battery shell in a sealed mode. A central space is disposed in the center of the pole piece group, a central pipe is arranged in the central space, a negative terminal is welded at the bottom of the battery shell, and a gelatinoid layer is filled at the bottom of the battery shell. Compared with the prior art, by filling the gelatinoid layer at the bottom of the battery shell to fix the pole piece group contained in the battery shell and effectively protecting soldered dots of the negative terminal of the pole piece group at the bottom of the battery shell so as to enable the soldered dots not to be damaged by shock of the pole piece group, shock resistance and impact resistance of the cylindrical lithium ion battery are effectively improved. And then, reliability of the battery is greatly improved, service life of the battery is remarkably prolonged, and the cylindrical lithium ion battery achieves high reliability in operating environment of electric tools.
Description
Technical field
The utility model belongs to technical field of lithium ion, relates in particular to a kind of cylindrical lithium ion battery with good resistance vibrations and shock resistance.
Background technology
Cylindrical lithium ion battery is as a kind of environmental protection battery; Have advantages such as high-energy-density, high working voltage and long life; In various mobile devices, obtained using widely, like various electric tools such as notebook computer, electric bicycle, battery-operated motor cycle and electric automobiles.
As shown in Figure 1; Cylindrical lithium ion battery generally comprises the pole piece group 20 with winding-structure; Be used to hold the battery container 10 of said pole piece group 20, be filled with electrolyte in the battery container 10, the central space of pole piece group 20 is provided with central tube 40; Seal group is connected to battery cap 30 on the battery container 10, and battery container 10 bottoms are welded with negative terminal 50.Wherein, pole piece group 20 by positive plate, negative plate and be interval in positive plate and negative plate between membrane coil around forming, the housing wall of negative terminal 50 from battery container 10 bottoms along battery container 10 arrives battery cap 30, and is welded on the battery cap 30.
When cylindrical lithium ion battery being applied in the electric tool,, when work, inevitably can cause impacts such as vibrations, shake to lithium ion battery because the job area of electric tool is wider as the energy supply element; And be contained in the pole piece group 20 in the battery container 10 owing to receive the continuous impact of external force, and press to the negative terminal 50 that is welded on battery container 10 bottoms easily, cause negative terminal 50 damaged, and then make battery lose function with the solder joint of battery container 10 bottoms.
In view of this, necessary a kind of cylindrical lithium ion battery with good resistance vibrations and shock resistance is provided, to improve its reliability in the electric tool environment for use.
The utility model content
The purpose of the utility model is: to the deficiency of prior art, and a kind of cylindrical lithium ion battery with good resistance vibrations and shock resistance is provided, to improve its reliability in the electric tool environment for use.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of cylindrical lithium ion battery; Comprise battery container, be contained in the interior pole piece group of said battery container, be filled in the electrolyte in the said battery container; And seal group is connected to the battery cap on the said battery container; The central authorities of said pole piece group are provided with central space, are provided with central tube in the said central space, said pole piece group by positive plate, negative plate and be interval in positive plate and negative plate between membrane coil around forming; Said battery container bottom is welded with negative terminal, and the battery container bottom is filled with the colloid substance layer.
As a kind of improvement of the utility model cylindrical lithium ion battery, said colloid substance layer is the pitch glue-line.
As a kind of improvement of the utility model cylindrical lithium ion battery, the thickness of said colloid substance layer is 1～2 times of negative terminal thickness, makes the colloid substance of injection cover the not many again obstruction pole piece of negative terminal group switching centre position just fully.
As a kind of improvement of the utility model cylindrical lithium ion battery, the thickness of said colloid substance layer is 0.05um～0.5um.
As a kind of improvement of the utility model cylindrical lithium ion battery, the thickness of said colloid substance layer is 0.1um～0.2um.
A kind of improvement as the utility model cylindrical lithium ion battery; Said negative terminal is fixed on the battery container bottom through said colloid substance layer; Negative terminal is also fixed by the colloid substance layer at the solder joint of battery container bottom, prevents the impact that the vibrations butt welding point of pole piece group causes.
As a kind of improvement of the utility model cylindrical lithium ion battery, said negative terminal is close to the battery container bottom and is arrived battery cap along the battery case body wall.Inject after the colloid substance, negative terminal is pressed down to being adjacent to the battery container bottom, and in the corner of battery container, negative terminal at right angles extends.
As a kind of improvement of the utility model cylindrical lithium ion battery, said pole piece group is fixedly connected with said battery container through said colloid substance layer, the pole piece group is unlikely to shakes because of extraneous impact.
With respect to prior art; The utility model fixes pole piece group that is contained in the battery container and the solder joint of effectively protecting pole piece group negative terminal in the battery container bottom through inject the colloid substance layer in the battery container bottom; Make the solder joint can breakage because of the vibrations of pole piece group; Thereby the anti-vibration and the shock resistance of cylindrical lithium ion battery have effectively been improved; And then make the reliability of battery and be able to obvious raising useful life, make it in the environment for use of electric tool, have higher reliability.
Description of drawings
Below in conjunction with Figure of description and embodiment, the useful technique effect of the utility model is elaborated, wherein:
Fig. 1 is the cross-sectional schematic of cylindrical lithium ion battery of the prior art;
Fig. 2 is the cross-sectional schematic of the cylindrical lithium ion battery of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but the execution mode of the utility model is not limited thereto.
As shown in Figure 2; A kind of cylindrical lithium ion battery of the utility model; Comprise battery container 1, be contained in pole piece group 2 in the said battery container 1, be filled in the electrolyte in the said battery container 1, and seal group is connected to the battery cap 3 on the said battery container 1, the central authorities of said pole piece group 2 are provided with central space; Be provided with central tube 4 in the said central space; Said pole piece group 2 by positive plate, negative plate and be interval in positive plate and negative plate between membrane coil around forming, said battery container 1 bottom is welded with negative terminal 5, battery container 1 bottom is filled with colloid substance layer 6.
Wherein, said colloid substance layer 6 is the pitch glue-line.
The thickness of said colloid substance layer 6 is 1～2 times of negative terminal thickness.
The thickness of said colloid substance layer 6 is 0.05um～0.5um, preferred 0.1um～0.2um.
Said negative terminal 5 is fixed on battery container 1 bottom through 6 layers of said colloid substances, and said negative terminal 5 is close to battery container 1 bottom and is arrived battery cap 3 along battery container 1 wall.
Said pole piece group 2 is fixedly connected with said battery container 1 through said colloid substance layer 6.
The concrete preparation process of pole piece group 2 is following:
The preparation of positive plate:
With cobalt acid lithium (LiCoO
2) as positive active material, as conductive agent, make ethene as binding agent to gather inclined to one side difluoro with carbon black, with N, N-dimethyl pyrrolidone (NMP) mixes the formation anode sizing agent as solvent with above-mentioned raw materials; Anode sizing agent is coated on the two sides of plus plate current-collecting body aluminium foil, after the drying, through positive plate rolling, that cutting forms preliminary dimension.
The preparation of negative plate:
As negative electrode active material, make ethene as binding agent with graphite, as solvent, above-mentioned raw materials is mixed, form cathode size with deionized water to gather inclined to one side difluoro; Cathode size is coated on the two sides of negative current collector Copper Foil, after the drying, through negative plate rolling, that cutting forms preliminary dimension.
Barrier film is selected the polypropylene porous septum for use.
The preparation of pole piece group 2: will be wound into pole piece group 2 through the volume pin according to positive plate, negative plate and the barrier film of aforementioned prepared, and subsequently central tube 4 inserted in the central space of pole piece group 2.
The preparation of cylindrical lithium ion battery: will place battery container 1 according to the pole piece group 2 of aforementioned prepared, and negative terminal 5 is welded on battery container 1 bottom through welding equipment; Through central tube 4 pitch glue is injected; Just cover the position of the central tube 4 of negative terminal 5 and not many again obstruction pole piece group 2 fully for the pitch glue that makes injection; Need its injection rate of control; Making bondline thickness is 1～1.5 times of thickness of negative terminal 5, and generally speaking, adding colloid amount control range is 0.8～1.2g; Utilize the preceding baking process of fluid injection that pole piece group 2 and battery container 1 are solidified then.Wherein, the baking process condition is: 85 ± 5 ℃ of temperature, time 16 ± 1h; After the bitumen embedding, electrolyte reinjects; At last battery cap 3 seal welds are connected on the top of battery container 1, make the utility model cylindrical lithium ion battery.Wherein, the preparation of electrolyte is following: earlier ethylene carbonate (EC), propene carbonate (PC) and dimethyl carbonate (DMC) are mixed according to mass ratio at 1: 1: 2, form mixed solvent, add lithium hexafluoro phosphate (LiFP then
6), and make LiFP
6Concentration be 1M, obtain electrolyte.
With respect to prior art; The utility model fixes the pole piece group 2 and effective solder joint of protecting the negative terminal 5 of pole piece group 2 in battery container 1 bottom that is contained in the battery container 1 through inject colloid substance layer 6 in battery container 1 bottom; Make the solder joint can breakage because of the vibrations of pole piece group 2; Thereby effectively improved the anti-vibration impact property of cylindrical lithium ion battery; And then make the reliability of battery and be able to obvious raising useful life, make it in the environment for use of electric tool, have higher reliability.
According to the announcement and the instruction of above-mentioned specification, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to is in the protection range of the claim that also should fall into the utility model to some modifications and the change of the utility model.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (8)
1. cylindrical lithium ion battery; Comprise battery container, be contained in the interior pole piece group of said battery container, be filled in the electrolyte in the said battery container; And seal group is connected to the battery cap on the said battery container; The central authorities of said pole piece group are provided with central space, are provided with central tube in the said central space, said pole piece group by positive plate, negative plate and be interval in positive plate and negative plate between membrane coil around forming; Said battery container bottom is welded with negative terminal, it is characterized in that: the battery container bottom is filled with the colloid substance layer.
2. cylindrical lithium ion battery according to claim 1 is characterized in that: said colloid substance layer is the pitch glue-line.
3. cylindrical lithium ion battery according to claim 1 is characterized in that: the thickness of said colloid substance layer is 1～2 times of negative terminal thickness.
4. cylindrical lithium ion battery according to claim 3 is characterized in that: the thickness of said colloid substance layer is 0.05um～0.5um.
5. cylindrical lithium ion battery according to claim 4 is characterized in that: the thickness of said colloid substance layer is 0.1um～0.2um.
6. cylindrical lithium ion battery according to claim 1 is characterized in that: said negative terminal is fixed on the battery container bottom through said colloid substance layer.
7. cylindrical lithium ion battery according to claim 6 is characterized in that: said negative terminal is close to the battery container bottom and is arrived battery cap along the battery case body wall.
8. cylindrical lithium ion battery according to claim 1 is characterized in that: said pole piece group is fixedly connected with said battery container through said colloid substance layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200894369U CN202495541U (en) | 2012-03-12 | 2012-03-12 | Cylindrical lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200894369U CN202495541U (en) | 2012-03-12 | 2012-03-12 | Cylindrical lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202495541U true CN202495541U (en) | 2012-10-17 |
Family
ID=47001754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200894369U Expired - Lifetime CN202495541U (en) | 2012-03-12 | 2012-03-12 | Cylindrical lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202495541U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269501A (en) * | 2014-09-19 | 2015-01-07 | 许玉林 | Cylindrical battery cap |
-
2012
- 2012-03-12 CN CN2012200894369U patent/CN202495541U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269501A (en) * | 2014-09-19 | 2015-01-07 | 许玉林 | Cylindrical battery cap |
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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: 20121017 |