CN202495553U - Lithium ion battery and protective board thereof - Google Patents
Lithium ion battery and protective board thereof Download PDFInfo
- Publication number
- CN202495553U CN202495553U CN2012200080163U CN201220008016U CN202495553U CN 202495553 U CN202495553 U CN 202495553U CN 2012200080163 U CN2012200080163 U CN 2012200080163U CN 201220008016 U CN201220008016 U CN 201220008016U CN 202495553 U CN202495553 U CN 202495553U
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- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- metal tape
- welded
- switching metal
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- 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
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- Secondary Cells (AREA)
Abstract
The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a protective board of a lithium ion battery. The protective board of the lithium ion battery comprises a first switch-over metal band, a first lead-out nickel piece, a second lead-out nickel piece, a positive temperature coefficient (PTC) thermistor, and a second switch-over metal band. The first lead-out nickel piece and the second lead-out nickel piece are respectively welded at two ends of the first switch-over metal band. The PTC thermistor is welded on the first lead-out nickel piece. One end of the second switch-over metal band is welded on an intersection point of the first switch-over metal band and the first lead-out nickel piece, and the other end of the second switch-over metal band is welded with a third lead-out nickel piece. The second lead-out nickel piece is welded with the third lead-out nickel piece. Compared with the prior art, the protective board of the lithium ion battery has small resistance and is easy to weld. During a high-magnification charge-discharge process of the battery, heat conduction of the switch-over metal bands to the PTC thermistor can be reduced. Safe use of the lithium ion battery is ensured, and also the protective board is enabled to bear larger current. In addition, the utility model further discloses the lithium ion battery comprising the protective board.
Description
Technical field
The utility model belongs to technical field of lithium ion, relates in particular to a kind of lithium ion baffle and comprises the lithium ion battery of this baffle.
Background technology
At present, lithium ion battery has been used in growing field as a kind of novel energy of environmental protection.
The charging method of lithium ion battery roughly has two kinds, i.e. constant current charge and constant voltage charging.In existing charging device, its charging circuit adopts the charging modes of constant current mostly.So-called constant current charge is meant that charging current is invariable in charging process, and along with the carrying out of charging, active material is resumed, and the electrode reaction area constantly dwindles, and the polarization of battery raises gradually, thereby reaches the purpose to lithium ion cell charging.In the process of lithium ion battery constant current charge; If being full of amount, the voltage of cell surpassed upper limit safe voltage; Just show that inside lithium ion cell has taken place to overcharge, over-charging of battery has not only reduced the useful life of battery, and has the danger of blast.
Phenomenon for fear of overcharging appears in lithium ion battery generally needs to add baffle.As shown in Figure 1; Baffle usually by switching nickel strap 1 ' and be welded on switching nickel strap 1 ' two ends draw nickel sheet 2 '; And be welded on wherein a semistor 3 ' (PTC) of drawing on the nickel sheet 2 ' and form; PTC can make circuit break off when reaching the protection temperature of design, to guarantee lithium ion battery safety in use.
But; Consumption electronic product is more and more paid attention to rapid charge characteristic; And baffle can be because the D.C. resistance of himself produce great amount of heat in big multiplying power charging process, and the temperature that causes PTC is too high and get into guard mode, makes the circuit disconnection; And stop battery to continue charging, hinder the further raising of battery product and filled performance soon.
In order to address this problem, can take following method: the one, improve the protection temperature of PTC merely, though can improve the fast punching performance of battery so to a certain extent, protect the raising of temperature can not guarantee product safety in use again; The 2nd, the resistance of reduction baffle, this is a kind of comparatively effective method.But the nickel sheet itself is the bigger sheet metal of a kind of resistivity, and the nickel sheet can increase the welding difficulty being difficult to effective welding above behind the 0.15mm so increase the thickness of individual layer nickel sheet merely, the reduction welding reliability.
In view of this, necessary a kind of security performance that both can guarantee battery is provided, but has the lithium ion battery protecting plate of big loaded current again, and the lithium ion battery that comprises this baffle.
The utility model content
One of purpose of the utility model is: overcome the deficiency of prior art, and a kind of security performance that both can guarantee battery is provided, but have the lithium ion battery protecting plate of loaded current greatly again.
To achieve these goals, the utility model adopts following technical scheme:
A kind of lithium ion battery protecting plate; Comprise the first switching metal tape, be welded on first of the said first switching metal tape two ends respectively and draw nickel sheet and second and draw the nickel sheet; And be welded on first semistor (PTC) of drawing on the nickel sheet; Also comprise the second switching metal tape; One end of the said second switching metal tape is welded in the first switching metal tape and first and draws on the intersection point of nickel sheet, and the other end is welded with the 3rd and draws the nickel sheet, and said second draws nickel sheet and the 3rd draws the nickel sheet and be welded to connect.The mode of this double-deck switching can be shared when overcharging first and draw the electric current that the nickel sheet bears; Thereby reduce the heat that PTC bears; Avoid causing circuit to break off because of its heat is excessive; Hinder the continuation charging of battery,, therefore also can guarantee the safety of battery simultaneously because the utility model does not improve the protection temperature of PTC itself.
As a kind of improvement of the utility model lithium ion battery protecting plate, the said first switching metal tape and the second switching metal tape are three-decker.
As a kind of improvement of the utility model lithium ion battery protecting plate, the intermediate layer of the said first switching metal tape and the second switching metal tape is the copper strips layer.
As a kind of improvement of the utility model lithium ion battery protecting plate, the superficial layer of the said first switching metal tape and the second switching metal tape is for electroplating the nickel dam on said copper strips layer.Because the resistivity of copper is little than nickel, therefore can reduces the internal resistance of metal tape, and, be beneficial to welding owing to the thickness of nickel dam in the three-decker is less.
As a kind of improvement of the utility model lithium ion battery protecting plate, the thickness of said copper strips layer is 0.05～0.15mm.The thickness of copper strips is too little, and then hardness is not enough, and easy welderingization; The thickness of copper strips is too big, and internal resistance is then bigger, is unfavorable for improving the security performance of baffle.
As a kind of improvement of the utility model lithium ion battery protecting plate, the thickness in monolayer of said nickel dam is 3～10 μ m.The thickness of nickel dam is too little, and then hardness is not enough, and easy welderingization; The thickness of nickel dam is too big, and internal resistance is then bigger, is unfavorable for improving the security performance of baffle, and the welding difficulty strengthens the soldering reliability reduction.
As a kind of improvement of the utility model lithium ion battery protecting plate, be surrounded by insulation material layer outside the said first switching metal tape and the second switching metal tape and the semistor (PTC), cause short circuit to prevent to contact with each other between the metal.
As a kind of improvement of the utility model lithium ion battery protecting plate, said second draws nickel sheet and the 3rd draws the nickel sheet and is connected through spot welding.
The beneficial effect of the utility model is: the lithium ion battery protecting plate of the utility model has less resistance, and is easy to welding; Battery is when high rate charge-discharge, and the caloric value of switching metal tape is less, thereby reduces the heat conduction of switching metal tape to PTC; Can guarantee the safe handling of lithium ion battery, can make baffle can bear bigger electric current again.
Another purpose of the utility model is to provide a kind of lithium ion battery that comprises this baffle, and comprise electric core, be positioned at the baffle of electric core front end, and the pack case of holding electric core, said baffle is the described lithium ion battery protecting plate of above-mentioned paragraph.
With respect to prior art, this use lithium ion battery has good safety performance and quick charge capability.
Description of drawings
Fig. 1 is the structural representation of lithium ion battery protecting plate in the prior art;
Fig. 2 is the structural representation of the utility model lithium ion battery protecting plate.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done further to describe:
A kind of lithium ion battery comprises electric core, is positioned at the baffle of electric core front end, and the pack case of holding electric core.Wherein, The structure of baffle is as shown in Figure 2, comprises the first switching metal tape 2, is welded on first of said first switching metal tape 2 two ends respectively and draws nickel sheet 3 and second and draw nickel sheet 4, and be welded on first semistor (PTC) 5 of drawing on the nickel sheet 3; First draws nickel sheet 3 is used to connect battery pole ear; Also comprise the second switching metal tape 6, an end of the said second switching metal tape 6 is welded in the first switching metal tape 2 and first and draws on the intersection point of nickel sheet 3, and the other end is welded with the 3rd and draws nickel sheet 7; Said second draws nickel sheet 4 and the 3rd draws nickel sheet 7 and is welded to connect, as the lug external circuits after the lithium ion battery switching.
Wherein, the said first switching metal tape 2 and the second switching metal tape 6 are three-decker, the intermediate layer, and thickness is 0.05～0.15mm; Superficial layer is for electroplating the nickel dam on said copper strips layer, and thickness in monolayer is 3～10 μ m.
Wherein, the said first switching metal tape 2 and the second switching metal tape 6 and semistor PTC5 are surrounded by insulation material layer outward.Second draws nickel sheet 4 and the 3rd draws nickel sheet 7 and is connected through spot welding.
The mode of this double-deck switching can be shared when overcharging first and draw the electric current that the nickel sheet bears; Thereby reduce the heat that PTC bears; Avoid causing circuit to break off because of its heat is excessive; Hinder the continuation charging of battery,, therefore also can guarantee the safety of battery simultaneously because the utility model does not improve the protection temperature of PTC itself.And, therefore can reduce the internal resistance of metal tape, and, be beneficial to welding owing to the thickness of nickel dam in the three-decker is less because the resistivity of copper is little than nickel.
The above is merely the preferred embodiment of the utility model, only is illustrative as far as the utility model, and nonrestrictive.Those skilled in the art is understood, and in spirit that the utility model claim is limited and scope, can carry out many changes to it, revise, in addition equivalent, but all will fall in the protection range of the utility model.
Claims (9)
1. lithium ion battery protecting plate; Comprise the first switching metal tape (2), be welded on first of said first switching metal tape (2) two ends respectively and draw nickel sheet (3) and second and draw nickel sheet (4); And be welded on first semistor (5) of drawing on the nickel sheet (3); It is characterized in that: also comprise the second switching metal tape (6); One end of the said second switching metal tape (6) is welded in the first switching metal tape (2) and first and draws on the intersection point of nickel sheet (3), and the other end is welded with the 3rd and draws nickel sheet (7), and said second draws nickel sheet (4) and the 3rd draws nickel sheet (7) and be welded to connect.
2. lithium ion battery protecting plate according to claim 1 is characterized in that: the said first switching metal tape (2) and the second switching metal tape (6) are three-decker.
3. lithium ion battery protecting plate according to claim 2 is characterized in that: the intermediate layer of the said first switching metal tape (2) and the second switching metal tape (6) is the copper strips layer.
4. lithium ion battery protecting plate according to claim 3 is characterized in that: the superficial layer of the said first switching metal tape (2) and the second switching metal tape (6) is for electroplating the nickel dam on said copper strips layer.
5. lithium ion battery protecting plate according to claim 4 is characterized in that: the thickness of said copper strips layer is 0.05～0.15mm.
6. lithium ion battery protecting plate according to claim 4 is characterized in that: the thickness in monolayer of said nickel dam is 3～10 μ m.
7. lithium ion battery protecting plate according to claim 1 is characterized in that: the outer insulation material layer that is surrounded by of the said first switching metal tape (2) and the second switching metal tape (6) and semistor (5).
8. lithium ion battery protecting plate according to claim 1 is characterized in that: said second draws nickel sheet (4) and the 3rd draws nickel sheet (7) and is connected through spot welding.
9. a lithium ion battery comprises electric core, is positioned at the baffle of electric core front end, and the pack case of holding electric core, it is characterized in that: said baffle is each described lithium ion battery protecting plate of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200080163U CN202495553U (en) | 2012-01-09 | 2012-01-09 | Lithium ion battery and protective board thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200080163U CN202495553U (en) | 2012-01-09 | 2012-01-09 | Lithium ion battery and protective board thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202495553U true CN202495553U (en) | 2012-10-17 |
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ID=47001766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200080163U Expired - Lifetime CN202495553U (en) | 2012-01-09 | 2012-01-09 | Lithium ion battery and protective board thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202495553U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720225A (en) * | 2016-03-31 | 2016-06-29 | 苏州工业园区职业技术学院 | Quick connector for power battery pack |
-
2012
- 2012-01-09 CN CN2012200080163U patent/CN202495553U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720225A (en) * | 2016-03-31 | 2016-06-29 | 苏州工业园区职业技术学院 | Quick connector for power battery pack |
| CN105720225B (en) * | 2016-03-31 | 2018-05-04 | 苏州工业园区职业技术学院 | A kind of power battery pack Quick connector |
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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: 20121017 |
|
| CX01 | Expiry of patent term |