CN201038256Y - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN201038256Y CN201038256Y CNU2007201461091U CN200720146109U CN201038256Y CN 201038256 Y CN201038256 Y CN 201038256Y CN U2007201461091 U CNU2007201461091 U CN U2007201461091U CN 200720146109 U CN200720146109 U CN 200720146109U CN 201038256 Y CN201038256 Y CN 201038256Y
- Authority
- CN
- China
- Prior art keywords
- battery
- lithium ion
- ion battery
- cover plate
- plate assembly
- 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
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 19
- 125000006850 spacer group Chemical group 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 4
- 210000005056 cell body Anatomy 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a lithium ion battery with an internal protection device, comprising a battery unit, a battery shell and a cover board assembly for sealing the battery shell, wherein, the battery unit is electrically connected with the over board assembly through a conductive terminal. The lithium ion battery is characterized in that a temperature fuse is connected in series between the battery unit and the cover board assembly. Solving the defects of the prior art including inaccurate detect about temperature and insensitive action, the utility model is capable of accurately detecting the temperature, closing down the battery loop when reaching the preset temperature and assuring the safety of the battery.
Description
Technical field
The present invention relates to a kind of lithium ion battery, be specifically related to the lithium ion battery that a kind of inside has protective device.
Technical background
In view of the superior function of lithium ion battery, use more and more widely, but also extremely people's attention of security performance.The immediate cause that causes lithium ion battery burning, blast is exactly that temperature in the cell body is too high, reaches its demolition point, mainly realizes bothering about protection by be close to a NTC (negative temperature coefficient thermistor) outside cell body in the technology at present.As figure one, NTC is in parallel with resistance R 2, and the variation of NTC resistance can cause the variation of the pressure drop on the parallel resistance; the TS pin of lithium ion battery protection chip is by detecting the pressure drop of this variation; when reaching certain value, the protection chip just can cut off external circuit, and then plays the effect of protection.But this protection has following shortcoming: 1, and temperature detection is inaccurate, because NTC is the outer surface that is attached to cell body, can not reflect the temperature in the body of pond, and the linearity of NTC itself is just not so good, again by the voltage reflection, so error can be very big; 2, the cost height; 3, operate time is slow, and is sensitive inadequately; 4, detection difficult, particularly in the middle of the multiple batteries connection in series-parallel is used, each batteries all will be with a NTC, and the wiring meeting is complicated more like this, and detection is understood more difficult.
The utility model content
The purpose of this utility model be solve the prior art temperature detection inaccurate, move insensitive shortcoming, the accurate detected temperatures of a kind of energy is provided, reaches the lithium ion battery of predetermined temperature automatic disconnection cell circuit.
The technical solution of the utility model: a kind of lithium ion battery, the cover plate assembly that comprises battery unit, battery container, sealed cell housing, battery unit is electrically connected by conducting terminal with cover plate assembly, it is characterized in that: be in series with Thermal Cutoffs between battery unit and cover plate assembly.
Further, be provided with spacer ring between described Thermal Cutoffs and the cover plate assembly.
Further, spacer ring be provided be provided with allow fuse one pin pass with cover plate assembly be electrically connected perforation.
Further, described penetration hole diameter is identical with the fuse leg diameter.
Further, described fuse skin is protected with Plastic Package.
The pin of fuse is the copper cash of electroplating surfaces with tin.
Beneficial effect: 1, temperature control original paper of the present utility model is arranged on inside battery, so temperature detection is accurate, action is fast, can in time disconnect cell circuit.2, can improve temperature detecting precision by the spacer ring isolation between Thermal Cutoffs and the cover plate assembly, avoid of the negative effect of the low temperature of cover plate assembly Thermal Cutoffs.3, the perforation energy fixed temperature fuse that is provided with on the spacer ring, the globality of assurance internal structure makes battery safer.4, the outer electrolyte corrosion temperature fuse that can prevent inside battery with Plastic Package of fuse.5, the pin of fuse adopts the copper cash of electroplating surfaces with tin, promptly is convenient to weld, can guarantee the heat conductivility that low resistance is become reconciled again.
Description of drawings
Fig. 1 is a conventional batteries temperature protection principle
Fig. 2 is Thermal Cutoffs figure
Fig. 3 is the Thermal Cutoffs figure that connects with conducting terminal
Fig. 4 is spacer ring figure
Embodiment
Embodiment, with cylindrical 18650 lithium ion batteries is example, detailed structure to battery describes, this battery comprises the cover plate assembly (not shown) of battery unit 6, battery container (not shown), sealed cell housing, battery unit 6 is electrically connected by conducting terminal 3 with cover plate assembly, is in series with Thermal Cutoffs 9 on the conducting terminal 3 that connects battery unit 6 and cover plate assembly.Fuse 9 skins are protected with Plastic Package, make it to isolate with electrolyte, and fuse 9 adopts tin-coated copper pin 4,5, and its pin 4 is electrically connected with the conducting terminal 3 of battery unit 6, and another pin 5 passes the spacer ring 8 with perforation 7 and is welded to connect with cover plate assembly.Thermal Cutoffs 9 concrete parameters are as follows:
Operating temperature: 102 ℃
Keep temperature: 77 ℃
Mahayana is subjected to temperature: 200 ℃
Operating current: 5A
Operating voltage: 250V
Internal resistance:＜20 milliohms
In case the temperature in the cell body meets or exceeds 102 ℃ of the temperature of setting, fuse will disconnect rapidly, and battery stops discharge, plays a very good protection, and battery just can not be because of the overheated burning that causes, blast.The battery of different model can be selected the Thermal Cutoffs of suitable parameters according to its operational environment.
The present invention is the lithium ion battery of shape such as the side's of being applicable to shell also.
Claims (6)
1. lithium ion battery comprises the cover plate assembly of battery unit, battery container, sealed cell housing, and battery unit is electrically connected by conducting terminal with cover plate assembly, it is characterized in that: be in series with Thermal Cutoffs between battery unit and cover plate assembly.
2. lithium ion battery according to claim 1 is characterized in that: be provided with spacer ring between Thermal Cutoffs and the cover plate assembly.
3. lithium ion battery according to claim 2 is characterized in that: spacer ring be provided be provided with allow fuse one pin pass with cover plate assembly be electrically connected perforation.
4. lithium ion battery according to claim 2 is characterized in that: described penetration hole diameter is identical with the fuse leg diameter.
5. according to any described lithium ion battery of claim 1 ~ 4, it is characterized in that: described fuse skin is protected with Plastic Package.
6. according to any described lithium ion battery of claim 1 ~ 4, it is characterized in that: the pin of fuse is the copper cash of electroplating surfaces with tin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201461091U CN201038256Y (en) | 2007-04-10 | 2007-04-10 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201461091U CN201038256Y (en) | 2007-04-10 | 2007-04-10 | Lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201038256Y true CN201038256Y (en) | 2008-03-19 |
Family
ID=39210776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201461091U Expired - Lifetime CN201038256Y (en) | 2007-04-10 | 2007-04-10 | Lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201038256Y (en) |
-
2007
- 2007-04-10 CN CNU2007201461091U patent/CN201038256Y/en not_active Expired - Lifetime
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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: 20080319 |