CN101286581B - Electricity cutting security architecture for over-charge of lithium battery with soft shell - Google Patents
Electricity cutting security architecture for over-charge of lithium battery with soft shell Download PDFInfo
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- CN101286581B CN101286581B CN200710090895A CN200710090895A CN101286581B CN 101286581 B CN101286581 B CN 101286581B CN 200710090895 A CN200710090895 A CN 200710090895A CN 200710090895 A CN200710090895 A CN 200710090895A CN 101286581 B CN101286581 B CN 101286581B
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- lithium battery
- soft shell
- handle
- plate
- charge
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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
Abstract
The invention relates to a safety structure of the power interruption of an overcharged soft shell lithium battery, comprising a soft shell lithium battery and a power interruption device. The soft shell lithium battery is provided with a positive handle, a negative handle, and a soft shell coated at the external part thereof; the power interruption device consists of a flat bar attached on the surface of the shell of the soft shell lithium battery and a separation mechanism connected above the flat bar and corresponding to the positive handle or the negative handle. When the soft shell lithium battery is overcharged, soft shell thereof swells up, thus leading the flat bar to move towards the outer flanks of the soft shell lithium battery, and separate the handles by the separation mechanism to realize the power interruption. Thereby the safety structure of power interruption of the overcharged soft shell lithium battery can not only simplify the integral structure so as to greatly reduce cost, but also effectively prevent the explosion of the soft shell lithium battery and serious damages caused by the explosion.
Description
Technical field
The present invention relates to a kind of electricity cutting security architecture, particularly a kind of electricity cutting security architecture of over-charge of lithium battery with soft shell.
Background technology
Universalness and high performance along with mobile electronic device, accumulator positive with high-energy-density is expected, under this background, adopt the electrochemical doping of active material lithium and the material with carbon element that goes to mix to popularize fast as the lithium ion battery of positive electrode active material as negative pole and employing lithium-containing transition metal compound.
Yet this lithium secondary battery can form overcharge condition as if overcharged, and superfluous lithium ion will be extracted out from positive pole, and gets involved (insertion) and separate out the lithium metal in the surplus of negative pole generation lithium ion.Lose the side of the positive electrode of lithium ion, will generate very unsettled high oxide.In addition, cell voltage under the overcharge condition rises to the specific voltage value when above, decomposition reaction can take place in the organic solvent of electrolyte, produce great number of flammable gas simultaneously, and the anxious exothermic reaction that swashs takes place and cause battery that the situation of abnormal heating is arranged, the result causes the impaired problem of the fail safe of battery.Based on aforementioned reason, the inventor just with this as problem and innovate and improve.
Have a kind of like this li-ion cell protection structure in the prior art, it mainly comprises abnormal detection circuit and optically coupled circuit, and wherein abnormal detection circuit is checked the voltage of rechargeable battery, and output detection signal; And optically coupled circuit is electrically coupled to abnormal detection circuit, and adjusts the impedance of optically coupled circuit according to detection signal, in order to disconnect being connected or making the rechargeable battery discharge or charge of rechargeable battery and external circuits.In addition, the protection structure that also has a kind of like this rechargeable battery in the prior art, it mainly comprises the first protection loop and the second protection loop, and wherein the first protection loop comprises the principal current load and the battery of main circuit connection and is connected in battery and the thermocouple induction switch of main circuit; The second protection loop comprises protective circuit and heater, and protective circuit connects main circuit and monitoring and compares cell voltage and the output enabling signal, and heater is connected to protective circuit, heats through starting the thermocouple induction switch.In addition, generally be used for the mechanical type protective device of cylinder type duricrust lithium battery at present, when utilizing lithium battery to be overcharged, internal pressure can increase and start relief valve, by the action of relief valve, pulls apart the conduction handle of inside battery.
Above-mentioned over-charge of lithium battery protection structure, though have to a certain degree protective effect for overcharging of battery, these assemblies and circuit can cause the damage and the consume of part assembly unavoidably, thereby lose original effect when long-time use.Yet the mechanical type safety guard of cylinder type duricrust lithium battery can't be used for lithium battery with soft shell again.In addition, above-mentioned various protection structures or device, all quite complicated and loaded down with trivial details aspect the combination of assembly and configuration.Therefore,, and adopt simple structure to overcome the high problem of cost, then become problem to be solved by this invention if can under the impaired situation of above-mentioned each assembly or circuit, still can carry out safe outage to battery.
Summary of the invention
Main purpose of the present invention is, a kind of electricity cutting security architecture of over-charge of lithium battery with soft shell is provided, it is by the electric handle setting of separating mechanism corresponding to lithium battery with soft shell, and utilize lithium battery with soft shell will be produced the characteristic of volumetric expansion after overcharging, and electric handle is separated outage by separating mechanism.So not only can simplify overall structure and significantly reduce cost, and can effectively prevent the blast of lithium battery with soft shell and the extensive damage of being derived thereof.
In order to achieve the above object, the invention provides a kind of electricity cutting security architecture of over-charge of lithium battery with soft shell, comprising: lithium battery with soft shell, it has positive electrical handle and negative electricity handle, and is covered with soft housing in described lithium battery with soft shell external packets; And breaker device, it comprises and amplexiforms in the plate of the soft surface of shell of described lithium battery with soft shell and be connected in described plate and corresponding to the separating mechanism of any one the electric handle in described positive electrical handle and the described negative electricity handle; Wherein said any one electric handle comprises utmost point handle and is connected in the conducting strip of described utmost point handle one end; Two fixed arms that wherein said separating mechanism comprises cutting knife and vertically extends from the two ends of described cutting knife respectively, described cutting knife and described plate are formed at the different both sides of the described utmost point handle of described any one electric handle respectively, and described two fixed arms are connected on the described plate; Wherein, the described housing of military order produced and expands after described lithium battery with soft shell was overcharged, and made the outer side shifting of described plate to described lithium battery with soft shell, and by separating mechanism described positive electrical handle or negative electricity handle was separated outage.
Description of drawings
Fig. 1 is a three-dimensional exploded view of the present invention;
Fig. 2 is combination stereoscopic figure of the present invention;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the assembled sectional view that the present invention is applied to battery pack;
Fig. 5 is a user mode cutaway view behind the over-charge of lithium battery with soft shell of the present invention;
Fig. 6 is the partial enlarged drawing of the a-quadrant of Fig. 5;
Fig. 7 is the assembled sectional view of another embodiment of the present invention; And
Fig. 8 is the user mode cutaway view of Fig. 7.
In the accompanying drawing, the list of parts of each label representative is as follows:
Lithium battery with soft shell 1
Anodal handle 121 conducting strips 122
Through hole 123 indentures 124
Conducting strip 132
Plate 21 through holes 211
Separating mechanism 22 cutting knifes 221
Fixed arm 222 cuttings 223
Hole 224
Embodiment
Relevant detailed description of the present invention and technology contents, conjunction with figs. is carried out following explanation, however accompanying drawing only provides reference and explanation usefulness, is not to be used for the present invention is limited.
Fig. 1 is a three-dimensional exploded view of the present invention, and Fig. 2 is combination stereoscopic figure of the present invention, and Fig. 3 is the vertical view of Fig. 2.The invention provides a kind of electricity cutting security architecture of over-charge of lithium battery with soft shell, it mainly comprises lithium battery with soft shell 1 and breaker device 2, wherein:
Lithium battery with soft shell 1 is made of a plurality of positive and negative pole plates and the barrier film (place not shown in the figures) that is located in respectively between each positive and negative pole plate.External packets at positive and negative pole plate and barrier film is covered with soft housing 11, and housing 11 can be aluminium foil or other sheet metal.Be connected with positive electrical handle 12 and negative electricity handle 13 respectively on the top of lithium battery with soft shell 1.Positive electrical handle 12 comprises the anodal handle 121 that connects each positive plate and is connected in the conducting strip 122 of anodal handle 121 1 ends.Anodal handle 121 can be aluminium foil.Negative electricity handle 13 comprises the negative pole handle 131 that connects each negative plate and is connected in the conducting strip 132 of negative pole handle 131 1 ends.Negative pole handle 131 can be Copper Foil.So just, constituted lithium battery with soft shell 1 of the present invention.
Fig. 4 is the assembled sectional view that the present invention is applied to battery pack, and Fig. 5 is a user mode cutaway view behind the over-charge of lithium battery with soft shell of the present invention, and Fig. 6 is the partial enlarged drawing of the a-quadrant of Fig. 5.Breaker device 2 of the present invention on the single lithium battery with soft shell 1 that can be applicable to previous embodiment, also can be applicable on the battery pack that forms by a plurality of lithium battery with soft shell 1 serial or parallel connections.After lithium battery with soft shell 1 was overcharged, the volume of military order housing 11 produced and expands, and makes the outer side shifting of plate 21 to lithium battery with soft shell 1, by separating mechanism 22 the anodal handle 121 of positive electrical handle 12 was cut simultaneously and cut off the power supply.Under general operating position, after lithium battery with soft shell 1 was overcharged, the surface of military order housing 11 produces expanded, and makes plate 21 can produce the lateral displacement amount of about 2mm, this enough makes cutting knife 221 that the anodal handle 121 of positive electrical handle 12 is cut and cuts off the power supply, thereby increases the fail safe of using.
Fig. 7 is the assembled sectional view of another embodiment of the present invention, and Fig. 8 is the user mode cutaway view of Fig. 7.In the present embodiment, the conducting strip 122 of positive electrical handle 12 is provided with through hole 123, and the mutual correspondence position above through hole 123 is towards being provided with " V " shape indenture 124.Be provided with through hole 211 on the plate 21 of breaker device 2, separating mechanism 22 then is a lamellar body, thereon, down two ends are respectively equipped with hole 224, wears for fixation kits such as rivets to be connected in through hole 123 and the hole 224.Two ends by separating mechanism 22 are fixedly connected on respectively on conducting strip 122 and the plate 21, military order housing 11 produces volumetric expansion after lithium battery with soft shell 1 is overcharged, and make the outer side shifting of plate 21 to lithium battery with soft shell 1, to make separating mechanism 22 that indenture 124 places of conducting strip 122 are disconnected and to separate.
In sum, the electricity cutting security architecture of over-charge of lithium battery with soft shell of the present invention has practicality, novelty and creativeness, and structure of the present invention also never sees like product and public use, meets the requirement of application for a patent for invention fully.
Claims (4)
1. the electricity cutting security architecture of an over-charge of lithium battery with soft shell comprises:
Lithium battery with soft shell (1), it has positive electrical handle (12) and negative electricity handle (13), and is covered with soft housing (11) in described lithium battery with soft shell (1) external packets; And
Breaker device (2), it comprises and amplexiforms in the plate (21) on the soft housing (11) of described lithium battery with soft shell (1) surface and be connected in described plate (21) and corresponding to the separating mechanism (22) of any one the electric handle in described positive electrical handle and the described negative electricity handle;
Wherein said any one electric handle comprises utmost point handle and is connected in the conducting strip of described utmost point handle one end;
Two fixed arms that wherein said separating mechanism comprises cutting knife and vertically extends from the two ends of described cutting knife respectively, described cutting knife and described plate are formed at the different both sides of the described utmost point handle of described any one electric handle respectively, and described two fixed arms are connected on the described plate;
Wherein, the described housing of military order (11) produced and expands after described lithium battery with soft shell (1) was overcharged, and make the outer side shifting of described plate (21), and described positive electrical handle or negative electricity handle are separated outage by separating mechanism (22) to described lithium battery with soft shell (1).
2. the electricity cutting security architecture of over-charge of lithium battery with soft shell as claimed in claim 1, wherein said housing (11) is an aluminium foil.
3. the electricity cutting security architecture of over-charge of lithium battery with soft shell as claimed in claim 1, wherein said cutting knife is formed with continuous cutting (223) in the side towards described positive electrical handle (12).
4. the electricity cutting security architecture of over-charge of lithium battery with soft shell as claimed in claim 1, wherein said plate (21) is the hard plate of being made by plastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710090895A CN101286581B (en) | 2007-04-11 | 2007-04-11 | Electricity cutting security architecture for over-charge of lithium battery with soft shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710090895A CN101286581B (en) | 2007-04-11 | 2007-04-11 | Electricity cutting security architecture for over-charge of lithium battery with soft shell |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101600878A Division CN101640294B (en) | 2007-04-11 | 2007-04-11 | Power failure safety structure for over charging of lithium battery with soft shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101286581A CN101286581A (en) | 2008-10-15 |
| CN101286581B true CN101286581B (en) | 2010-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710090895A Expired - Fee Related CN101286581B (en) | 2007-04-11 | 2007-04-11 | Electricity cutting security architecture for over-charge of lithium battery with soft shell |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108091952B (en) * | 2018-01-22 | 2023-10-24 | 深圳赛骄阳能源科技股份有限公司 | Novel unmanned aerial vehicle lithium cell |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568556A (en) * | 2000-10-20 | 2005-01-19 | 瑞约伐克股份有限公司 | Method and apparatus for regulating charging of electrochemical cells |
| CN2702450Y (en) * | 2004-05-11 | 2005-05-25 | 东莞新能源电子科技有限公司 | Safety type soft packaging battery |
| CN1767232A (en) * | 2004-10-28 | 2006-05-03 | 三星Sdi株式会社 | Secondary battery |
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2007
- 2007-04-11 CN CN200710090895A patent/CN101286581B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1568556A (en) * | 2000-10-20 | 2005-01-19 | 瑞约伐克股份有限公司 | Method and apparatus for regulating charging of electrochemical cells |
| CN2702450Y (en) * | 2004-05-11 | 2005-05-25 | 东莞新能源电子科技有限公司 | Safety type soft packaging battery |
| CN1767232A (en) * | 2004-10-28 | 2006-05-03 | 三星Sdi株式会社 | Secondary battery |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2001-185124A 2001.07.06 |
| JP特开平10-208726A 1998.08.07 |
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| CN101286581A (en) | 2008-10-15 |
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Granted publication date: 20100526 Termination date: 20140411 |