CN203288688U - Safe lithium ion battery - Google Patents
Safe lithium ion battery Download PDFInfo
- Publication number
- CN203288688U CN203288688U CN2013202547485U CN201320254748U CN203288688U CN 203288688 U CN203288688 U CN 203288688U CN 2013202547485 U CN2013202547485 U CN 2013202547485U CN 201320254748 U CN201320254748 U CN 201320254748U CN 203288688 U CN203288688 U CN 203288688U
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- CN
- China
- Prior art keywords
- pole piece
- lithium ion
- metal sheet
- conductive metal
- ion battery
- 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
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- Secondary Cells (AREA)
Abstract
The utility model belongs to the field of lithium ion batteries, and particularly relates to a safe lithium ion battery. The safe lithium ion battery comprises a packing bag, an electrical core accommodated in the packing bag, and electrolyte poured into the packing bag, wherein the electrical core comprises a positive pole piece and a negative pole piece which are mutually wound as well as an isolating membrane arranged between the positive pole piece and the negative pole piece; a negative electrode lug and a positive electrode lug are arranged at the front end of the electrical core; a conductive metal sheet is arranged on the positive pole piece and the negative pole piece; hollow parts are formed in the conductive metal sheet. According to the utility model, when extrusion, collision or other situation occurs, due to deformation of the battery, the isolating membrane between a positive pole fluid and a negative pole fluid is rapidly punctured by sharp edges and corners of the hollow parts, so that the short circuit happens between the positive pole fluid and the negative pole fluid inside the battery, the energy is decreased rapidly, the ignition probability of the lithium ion battery during use is reduced, and the safety risk is greatly reduced.
Description
Technical field
The utility model belongs to the lithium ion battery field, relates in particular to a kind of safe lithium ion battery.
Background technology
As everyone knows, lithium ion battery is gradually by electronic market product extensive use, as mobile phone, and notebook computer, electric tool etc.But the security risk of following simultaneously also exists, and during as extruding or shock, due to the generation of internal short-circuit of battery reaction, heat can not in time conduct and cause battery to catch fire is more dangerous.
General internal short-circuit of battery is divided into following four kinds of situations: the one, and the short circuit between the both positive and negative polarity diaphragm, the 2nd, the short circuit between anodal utmost point fluid and cathode membrane; The 3rd, the short circuit between negative pole utmost point fluid and anodal diaphragm, the 4th, the short circuit between both positive and negative polarity utmost point fluid.According to experiment, wherein the most dangerous short circuit mode is the second situation, the short circuit between anodal utmost point fluid and cathode membrane, and heat is difficult to transmit, and easily causes and catches fire; Safety and the fastest short circuit mode of heat transmission are the 4th kind of situations.
For preventing that at present lithium ion battery non-ignitable method in extruding or shock from being: avoid both positive and negative polarity diaphragm, utmost point fluid to contact with diaphragm as far as possible, thereby make battery occur as clash into or the inside reaction that is not short-circuited during extruding, thereby make battery avoid catching fire.General method is that this coating plays insulating effect when extruding occurring or clash into by be coated with the insulating barrier of last layer alundum (Al2O3) etc. on negative electrode membrane surface, anode membrane surface or barrier film, makes the inside battery reaction that is not short-circuited.But above complex production process, cost is high, and produces excellent rate and can reduce along with the increase of process; , due to the normally nonconducting megohmite insulant of coating, can affect the electrochemistry high rate performance of battery simultaneously.Even but adopt these loaded down with trivial details coating process, the generation of the second short-circuit conditions in the time of still can't avoiding battery core to fracture fully, still have the quite high probability that catches fire when mechanical presses and collision.
The utility model content
The purpose of this utility model is: the production process for prior art is loaded down with trivial details, produces the high shortcoming of cost, provides a kind of security performance good lithium ion battery,, significantly to reduce the probability that catches fire when pushing or clash into use, reduces security risk.
For achieving the above object, the utility model adopts following technical scheme: a kind of safe lithium ion battery, comprise packaging bag, be contained in the battery core in described packaging bag and be poured into the interior electrolyte of described packaging bag, described battery core comprise anode pole piece, the cathode pole piece of mutual coiling and be arranged at described anode pole piece and described cathode pole piece between barrier film, described battery core front end is provided with negative lug and positive pole ear, described anode pole piece and described cathode pole piece are provided with conductive metal sheet, and described conductive metal sheet is provided with hollow-out parts.
Described anode pole piece comprises plus plate current-collecting body, and described conductive metal sheet is arranged at the blank space of described plus plate current-collecting body.
Described cathode pole piece comprises negative current collector, and described conductive metal sheet is arranged at the blank space of described negative current collector.
Described conductive metal sheet is set to " ten " character form structure or triangular structure.
The thickness of described conductive metal sheet is 0.02 ~ 1.0mm.
The thickness of described conductive metal sheet is 0.1 ~ 0.2mm.
Described hollow-out parts be shaped as at least a in " ten " font, " L " shape, "T"-shaped, " Z " shape and " V " shape.
The beneficial effects of the utility model are: the utility model comprises packaging bag, is contained in the battery core in packaging bag and is poured into the packaging bag electrolyte inside, battery core comprise anode pole piece, the cathode pole piece of mutual coiling and be arranged at anode pole piece and cathode pole piece between barrier film, the battery core front end is provided with negative lug and positive pole ear, anode pole piece and cathode pole piece are provided with conductive metal sheet, and conductive metal sheet is provided with hollow-out parts.The utility model can be when situations such as extruding or shock occurs, battery is due to the generation of deformation, sharp corner angle by hollow-out parts pierce through rapidly the barrier film between both positive and negative polarity utmost point collector, inside battery both positive and negative polarity utmost point fluid is short-circuited, energy reduces rapidly, reduce the lithium ion battery probability that catches fire in use, greatly reduced security risk.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
, below in conjunction with embodiment and Figure of description, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
As shown in Figure 1, a kind of safe lithium ion battery, comprise packaging bag, be contained in the battery core 8 in packaging bag and be poured into the packaging bag electrolyte inside, battery core 8 comprise anode pole piece 2, the cathode pole piece 1 of mutual coiling and be arranged at anode pole piece 2 and cathode pole piece 1 between barrier film 3, battery core 8 front ends are provided with negative lug 4 and positive pole ear 5, anode pole piece 2 and cathode pole piece 1 are provided with conductive metal sheet 6, and conductive metal sheet 6 is provided with hollow-out parts 7.
Preferably, anode pole piece 2 comprises the plus plate current-collecting body (not shown), at volume core initiating terminal or ending end, comprises the blank plus plate current-collecting body of at least one circle, and conductive metal sheet 6 is arranged at the blank space of plus plate current-collecting body.
More excellent, cathode pole piece 1 comprises the negative current collector (not shown), at volume core initiating terminal or ending end, comprises the blank negative current collector of at least one circle, conductive metal sheet 6 is arranged at the blank space of negative current collector.
Preferably, conductive metal sheet 6 is set to " ten " character form structure or triangular structure, when considering cell thickness, the thickness of conductive metal sheet 6 can not exceed negative lug 4 or positive pole ear 5 the thickest person wherein, and conductive metal sheet 6 positions not with negative lug 4 or positive pole ear 5 location overlaps, in order to avoid cause battery core 8 due to thickness is increased.If do not consider in the cell thickness situation, only need to consider that not exceeding the battery length and width get final product: the widest end of conductive metal sheet 6 must not exceed the width of rolling up pin while reeling, and the long end of conductive metal sheet 6 can not exceed battery length.
Conductive metal sheet 6 materials are the good metallics of conductivity, preferably copper.
The thickness of conductive metal sheet 6 is 0.02 ~ 1.0mm, and the length of side of the hollow-out parts 7 on conductive metal sheet 6 does not wait from tens microns to several centimetres, and the length of sharp end is 1 ~ 10mm.
More excellent, the thickness of conductive metal sheet 6 is 0.1 ~ 0.2mm.
Preferably, hollow-out parts 7 be shaped as at least a in " ten " font, " L " shape, "T"-shaped, " Z " shape and " V " shape, hollow-out parts 7 has sharp corner angle, when battery deformation, the sharp corner angle of hollow-out parts 7 are outstanding punctures barrier film 3, causes plus plate current-collecting body and negative current collector to be short-circuited, and the energy of battery is reduced rapidly, battery can not catch fire, thereby reduces the security risk of battery when extruding or shock.
The course of work of the present utility model is: when having extruding or impact events to occur, battery is due to the generation of deformation, make anode pole piece 2 and cathode pole piece 1 be provided with conductive metal sheet 6 deformation also occurs simultaneously, barrier film 3 is pierced through rapidly in the meeting of the hollow-out parts 7 on it, make the reaction that is short-circuited of plus plate current-collecting body and negative current collector moment, cell voltage reduces rapidly, thereby the energy content of battery is disappeared, avoid catching fire, reduce the lithium ion battery probability that catches fire in use, greatly reduced security risk.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also change and revise above-mentioned execution mode.Therefore, the utility model is not limited to above-mentioned embodiment, and every those skilled in the art have done on basis of the present utility model any apparent improvement, replacement or modification all belong to protection range of the present utility model.In addition, although used some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (7)
1. the lithium ion battery of a safety, comprise packaging bag, be contained in the battery core in described packaging bag and be poured into the interior electrolyte of described packaging bag, described battery core comprise anode pole piece, the cathode pole piece of mutual coiling and be arranged at described anode pole piece and described cathode pole piece between barrier film, the front end of described battery core is provided with negative lug and positive pole ear, it is characterized in that: described anode pole piece and described cathode pole piece are provided with conductive metal sheet, and described conductive metal sheet is provided with hollow-out parts.
2. safe lithium ion battery according to claim 1, it is characterized in that: described anode pole piece comprises plus plate current-collecting body, described conductive metal sheet is arranged at the blank space of described plus plate current-collecting body.
3. safe lithium ion battery according to claim 2, it is characterized in that: described cathode pole piece comprises negative current collector, described conductive metal sheet is arranged at the blank space of described negative current collector.
4. safe lithium ion battery according to claim 1, it is characterized in that: described conductive metal sheet is set to " ten " character form structure or triangular structure.
5. safe lithium ion battery according to claim 4, it is characterized in that: the thickness of described conductive metal sheet is 0.02 ~ 1.0mm.
6. safe lithium ion battery according to claim 5, it is characterized in that: the thickness of described conductive metal sheet is 0.1 ~ 0.2mm.
7. safe lithium ion battery according to claim 1 is characterized in that: described hollow-out parts be shaped as at least a in " ten " font, " L " shape, "T"-shaped, " Z " shape and " V " shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202547485U CN203288688U (en) | 2013-05-13 | 2013-05-13 | Safe lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202547485U CN203288688U (en) | 2013-05-13 | 2013-05-13 | Safe lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203288688U true CN203288688U (en) | 2013-11-13 |
Family
ID=49545036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202547485U Expired - Lifetime CN203288688U (en) | 2013-05-13 | 2013-05-13 | Safe lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203288688U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728346A (en) * | 2017-10-30 | 2019-05-07 | 比亚迪股份有限公司 | A kind of lithium ion battery and battery pack |
| WO2024007723A1 (en) * | 2022-07-07 | 2024-01-11 | 荣耀终端有限公司 | Battery |
-
2013
- 2013-05-13 CN CN2013202547485U patent/CN203288688U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728346A (en) * | 2017-10-30 | 2019-05-07 | 比亚迪股份有限公司 | A kind of lithium ion battery and battery pack |
| CN109728346B (en) * | 2017-10-30 | 2022-01-07 | 比亚迪股份有限公司 | Lithium ion battery and battery pack |
| WO2024007723A1 (en) * | 2022-07-07 | 2024-01-11 | 荣耀终端有限公司 | 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 |
Granted publication date: 20131113 |
|
| CX01 | Expiry of patent term |