CN201038257Y - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN201038257Y CN201038257Y CNU2007201461119U CN200720146111U CN201038257Y CN 201038257 Y CN201038257 Y CN 201038257Y CN U2007201461119 U CNU2007201461119 U CN U2007201461119U CN 200720146111 U CN200720146111 U CN 200720146111U CN 201038257 Y CN201038257 Y CN 201038257Y
- Authority
- CN
- China
- Prior art keywords
- battery
- lithium ion
- ion battery
- electric current
- cover plate
- 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
- 238000007789 sealing Methods 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 238000000034 method Methods 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
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009993 protective function 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 overcurrent protecting 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 current fuse is connected in series between the battery unit and the cover board assembly. For the current control components are arranged in the battery, thus the utility model is capable of detecting the temperature in an accurate and rapid manner and shutting the battery loop duly.
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.
Background technology
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 electric current in the cell body is too high, reaches its demolition point.Cause that the too high main cause of electric current is that battery discharge current is excessive in the cell body.
The battery overcurrent can cause various faults, and crossing fails to be convened for lack of a quorum directly causes pond body electric current to rise, and may further cause the fault of battery burning, blast.Mainly realize overcurrent protection in the technology at present by external circuit; promptly in circuit, add a current sense resistor; loop current can detect pressure drop of generation on the resistance; the pressure drop of passing through to detect this variation of lithium ion battery protection chip; when reaching certain value; the protection chip just can cut off external circuit, and then plays the effect of protection, and Fig. 1 is a typical external current protecting circuit.The method of this overcurrent protection battery is to adopt the external circuit protection, therefore, takies than large space, and the external circuit protection chip of this battery need be welded on the battery complex process in addition.
The utility model content
The purpose of this utility model is to solve the prior art deficiency, and a kind of have excess current protective function and compact conformation, the simple lithium ion battery of manufacturing process are provided.
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 the electric current fuse between battery unit and cover plate assembly.
Further, be provided with spacer ring between described electric current fuse and the cover plate assembly.
Further, spacer ring be provided be provided with allow electric current fuse one pin pass with cover plate assembly be electrically connected perforation.
Further, described penetration hole diameter is identical with electric current fuse leg diameter.
Further, described electric current fuse skin is protected with Plastic Package.
The pin of fuse is the copper cash of electroplating surfaces with tin.
Beneficial effect: 1, Current Control original paper of the present utility model is arranged on inside battery, so current detecting is accurate, action is fast, can in time disconnect cell circuit.2, can avoid electric current fuse and cover plate assembly short circuit by the spacer ring isolation between electric current fuse and the cover plate assembly.3, the perforation energy fixed current fuse that is provided with on the spacer ring, the globality of assurance internal structure makes battery safer.4, the outer electrolyte corrosion current 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 decay resistance that low resistance is become reconciled again.
Description of drawings
Fig. 1 is a conventional batteries current protection principle
Fig. 2 is electric current fuse figure
Fig. 3 is the electric current fuse 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 electric current fuse 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.Electric current fuse 9 concrete parameters are as follows:
Operating current: 45 ℃
Rated current: 8A
Rated voltage: 24V
Operating current: 25A
Operate time: 100ms
Internal resistance: 9 milliohms
In case the electric current in the cell body meets or exceeds the electric current 25A of setting, the electric current fuse will disconnect rapidly, and battery stops discharge, and battery just can not be because of the overheated burning that causes, blast.The battery of different model can be selected the electric current fuse 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 the electric current fuse 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 electric current fuse 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 electric current 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 electric current fuse leg diameter.
5. according to any described lithium ion battery of claim 1 ~ 4, it is characterized in that: described electric current 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 circuit fuse is the copper cash of electroplating surfaces with tin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201461119U CN201038257Y (en) | 2007-04-10 | 2007-04-10 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201461119U CN201038257Y (en) | 2007-04-10 | 2007-04-10 | Lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201038257Y true CN201038257Y (en) | 2008-03-19 |
Family
ID=39210777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201461119U Expired - Lifetime CN201038257Y (en) | 2007-04-10 | 2007-04-10 | Lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201038257Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10312481B2 (en) | 2014-03-31 | 2019-06-04 | Byd Company Limited | Housing assembly and battery module comprising the same |
-
2007
- 2007-04-10 CN CNU2007201461119U patent/CN201038257Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10312481B2 (en) | 2014-03-31 | 2019-06-04 | Byd Company Limited | Housing assembly and battery module comprising the same |
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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 |
Granted publication date: 20080319 |
|
| CX01 | Expiry of patent term |