CN204885311U - A lithium battery - Google Patents

A lithium battery Download PDF

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Publication number
CN204885311U
CN204885311U CN201520598872.2U CN201520598872U CN204885311U CN 204885311 U CN204885311 U CN 204885311U CN 201520598872 U CN201520598872 U CN 201520598872U CN 204885311 U CN204885311 U CN 204885311U
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China
Prior art keywords
electrode
pole
negative pole
casing
housing
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CN201520598872.2U
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Chinese (zh)
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唐娇君
黄晓伟
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Wuhu Etc Battery Ltd
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Wuhu Etc Battery Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The utility model provides a lithium battery, including electric core main part and casing, the encapsulation of electric core main part sets up in the casing, electricity core main part is including positive pole, negative pole and reference electrode, positive pole, negative pole and reference electrode are equipped with respectively and draw forth the wire, the anodal wire welded fastening that draws forth forms the first ploe post on the casing, the wire welded fastening that draws forth of negative pole forms the second ploe post on the casing, reference electrode's the wire welded fastening that draws forth forms third utmost point post on the casing. With the encapsulation of three electrode structure's electric core in the casing, set up utmost point post simultaneously, keep apart completely with the external world, compare prior art and does not have the electric core structure of encapsulation and compare, can effectively avoid electric core seeing light or meeting water after combustion explosion initiation accident, showing the improvement security performance, simultaneously obtain the truth whether electric in -core portion analysed lithium and safety problem through measuring positive and negative pole tension and negative pole and reference electrode voltage, and then avoid electric core continuation use to lead to worsening and the safety problem.

Description

A kind of lithium battery
Technical field
The utility model relates to field of batteries, specifically be a kind of lithium battery.
Background technology
Because the whole world is applied the extensive concern Persisting exploitation of green energy resource, lithium ion battery makes its coverage being used to consumer electronics and power source increasing due to its advantage such as high voltage, high-energy-density.
But for lithium ion battery productive consumption and application, very important one side is exactly its fail safe, comprise the production safety assessment before the use manufacturing end and security monitoring, the security monitoring etc. of use side.Inevitably, lithium ion battery there will be dissimilar security risk below different environment for use, people also more and more pay close attention to the safe handling of battery core and how to take precautions against the generation of the similar security incidents such as even blast of smoldering on fire of battery core appearance, and these will directly jeopardize the person and the property safety of people.
Traditional raising electrokinetic cell security performance comprise adopt current protection plate to limit battery core maximum operation voltage, add fire retardant, in core strueture part, add the mode such as temperature-sensitive or pressure-sensitive electronic device, although these can improve fail safe or monitoring property within the specific limits, but still can have certain negative effect to battery core; As baffle cannot detect battery core internal short-circuit, interpolation and the built-in electronic device of combustion agent can sacrifice the defects such as battery core capacity or energy density.
Therefore, be necessary to provide a kind of structure simple, effectively can improve again the lithium battery structure of security performance.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of lithium battery, realize overall structure simple while, can security performance be significantly improved again.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of lithium battery, comprises battery core main body and housing, and described battery core main body encapsulation is arranged in described housing; Described battery core main body comprises positive pole, negative pole and reference electrode; Described positive pole, negative pole and reference electrode are respectively equipped with extraction wire;
The extraction wire of described positive pole is fixedly installed on housing and forms the first pole; The extraction wire of described negative pole is fixedly installed on housing and forms the second pole; The extraction wire of described reference electrode is fixedly installed on housing and forms the 3rd pole.
Wherein, the material of described reference electrode is lithium metal; The extraction wire of described reference electrode is metallic nickel material or lug.
Wherein, described reference electrode is the metal being coated with dielectric film; Described 3rd pole is connected successively after positive pole and negative pole charge by the extraction wire of reference electrode and is formed.
Wherein, the material of described reference electrode is copper, nickel, stainless steel or titanium dioxide.
Wherein, described reference electrode is between described positive pole and negative pole.
Wherein, the first voltmeter and the second voltmeter is comprised; Described first voltmeter connects the first pole and the second pole; Described second voltmeter connects the second pole and the 3rd pole.
The beneficial effects of the utility model are: the lithium battery being different from prior art needs to arrange current protection plate or interpolation fire retardant or temperature-sensitive device to improve battery security, but current protection plate cannot detect battery core internal short-circuit, additive can increase the deficiencies such as battery core capacity and density again; The utility model by arranging reference electrode in battery core body interior, and forms the first pole, the second pole and the 3rd pole accordingly on housing; Be encapsulated in housing by the battery core of three-electrode structure, arrange pole simultaneously, completely isolated with the external world, the core strueture compared to existing technology without encapsulation is compared, and battery core effectively can being avoided seeing that light or the after-combustion of chance water are exploded accidents caused, significantly improving security performance; Meanwhile, can judge whether battery core inside is short-circuited situation by the monitoring magnitude of voltage of both positive and negative polarity and the magnitude of voltage between reference electrode and negative pole again, and then avoid battery core to continue use causing worsening and causing some row safety problems.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of lithium battery of the utility model;
Fig. 2 is the battery core agent structure schematic diagram of the built-in reference electrode of the utility model;
Fig. 3 is the battery core agent structure schematic diagram of the external reference electrode of the utility model.
Label declaration:
1, battery core main body; 2, housing; 3, positive pole; 4, negative pole; 5, reference electrode;
6, wire is drawn; 7, the first pole; 8, the second pole; 9, the 3rd pole;
10, barrier film; 11, the first voltmeter; 12, the second voltmeter.
Embodiment
By describing technology contents of the present utility model in detail, realized object and effect, accompanying drawing is coordinated to be explained below in conjunction with execution mode.
The design of the utility model most critical is: the battery core main body be made up of both positive and negative polarity and reference electrode be encapsulated in housing, and on housing, forms the first pole, the second pole and the 3rd pole accordingly; Ensure the security performance of electrode; And can judge whether battery core inside is short-circuited situation by monitoring both positive and negative polarity magnitude of voltage and the magnitude of voltage between reference electrode and negative pole.
Please refer to Fig. 1 to Fig. 3, the utility model provides a kind of lithium battery, comprises battery core main body 1 and housing 2, and described battery core main body 1 encapsulation is arranged in described housing 2; Described battery core main body 1 comprises positive pole 3, negative pole 4 and reference electrode 5; Described positive pole 3, negative pole 4 and reference electrode 5 are respectively equipped with draws wire 6;
The extraction wire 6 of described positive pole 3 is fixedly installed on housing 2 and forms the first pole 7; The extraction wire 6 of described negative pole 4 is fixedly installed on housing 2 and forms the second pole 8; The extraction wire 6 of described reference electrode 5 is fixedly installed on housing 2 and forms the 3rd pole 9.
From foregoing description, the beneficial effects of the utility model are: adopt the inner negative pole 4 of three electrode monitoring battery cores to analyse Li dendrite and (adopt the lithium battery of liquid electrolyte when charging, the dendritic metal lithium simple substance formed during lithium ion reduction) time cause the situation of short circuit, thus avoid battery core to continue to use and cause battery core to worsen and a series of safety problems of producing.Further, prompting can be made when severe exacerbation does not also occur battery core in early days, and then take corresponding safe handling work, its personal safety and property safety have been carried out early stage containment when not also being on the hazard; The three-electrode structure of a kind of lithium battery that the utility model provides, with low cost, operate simple and easy, without extra negative effect.
Further, the material of described reference electrode 5 is lithium metal; The extraction wire 6 of described reference electrode 5 is metallic nickel material or lug.
Seen from the above description, when reference electrode 5 is lithium metal material, its lead-out wire is required to be the lug of metallic nickel or the material such as aluminium, nickel; This is comparatively active based on the characteristic of lithium metal, if be not encapsulated in the prior art in housing, then after chance water is shown in light, easy firing explodes, and has considering of larger potential safety hazard.The reference electrode of lithium metal is encapsulated in housing; and adopt above-mentioned can fine erosion-resisting material or possess Thermal Protection Structural lead-out wire as outer conductor; just can guarantee that the three electrode battery cores that formed by the reference electrode 5 of lithium metal material and the external world well isolate; can be taken precautions against future again simultaneously, possess higher-security energy.
Further, described reference electrode 5 is for being coated with the metal of dielectric film; Described 3rd pole 9 is connected successively after positive pole 3 and negative pole 4 charge by the extraction wire 6 of reference electrode 5 and is formed.
Seen from the above description, when reference electrode 5 is formed for the metal with dielectric film parcel, described reference electrode 5 needs connect successively after positive pole 3 and negative pole 4 carry out charging certain hour after micro-electric current just can be converted into third electrode, well could play supervisory function bit.
Further, the material of described reference electrode 5 is copper, nickel, stainless steel or titanium dioxide.
Seen from the above description, the reference electrode 5 that above-mentioned material is formed, electric conductivity is good, guarantees the accuracy detecting voltage.
Further, described reference electrode 5 is between described positive pole 3 and negative pole 4.
Seen from the above description, reference electrode 5 is arranged between positive pole 3 and negative pole 4, forms built-in reference electrode 5 structure; If be arranged on by reference electrode 5 outside positive pole 3 or negative pole 4, then form external reference electrode 5 structure.Internal or external structure can be selected flexibly according to demand.
Further, the first voltmeter 11 and the second voltmeter 12 is also comprised; Described first voltmeter 11 connects the first pole 7 and the second pole 8; Described second voltmeter 12 connects the second pole 8 and the 3rd pole 9.
Seen from the above description, the first voltmeter 11 is for monitoring the magnitude of voltage between positive pole 3 and negative pole 4; Second voltmeter 12 is for detecting reference voltage value.Just can judge whether battery core abnormal short-circuit conditions occurs by both positive and negative polarity 4 magnitude of voltage and reference voltage value, monitoring mode is simple, accurate.
Please refer to shown in Fig. 1, Fig. 2 and Fig. 3, embodiment one of the present utility model is:
A kind of lithium battery, comprises battery core main body 1 and housing 2, and described battery core main body 1 encapsulation is arranged in described housing 2; Described battery core main body 1 comprises the reference electrode 5 of the positive pole 3 be immersed in electrolyte, negative pole 4 and lithium metal material.
Described positive pole 3, negative pole 4 and reference electrode 5 are respectively equipped with draws wire 6; The lead-out wire of reference electrode 5 is metallic nickel material, or the lug of aluminium material, or the lug of nickel material.The extraction wire 6 of described positive pole 3 is weldingly fixed on housing 2 and forms Positive Poles; The extraction wire 6 of described negative pole 4 is weldingly fixed on housing 2 and forms negative pole pole; The extraction wire 6 of described reference electrode 5 is weldingly fixed on housing 2 and forms the 3rd pole 9.
Described reference electrode 5 is arranged in the barrier film 10 between positive pole 3 and negative pole 4, forms built-in reference electrode 5 structure.Certainly, also described reference electrode 5 can be arranged on positive pole 3 or negative pole 4 outside, wrap up with barrier film 10 separately, form external reference electrode 5 structure.
In the use procedure of lithium battery, obtain by measuring both positive and negative polarity 4 voltage and negative pole 4 and reference electrode 5 voltage the truth whether battery core inside analyses lithium and safety problem.
Concrete, between negative pole 4 and reference electrode 5, voltage is≤0V, and between both positive and negative polarity 4 during > 0V, can judge that the battery core of lithium battery has started to analyse lithium at negative pole 4; Now technical staff can the safe coefficient of intervention analysis battery core, thus can take processing scheme to prevent trouble before it happens.
Between negative pole 4 and reference electrode 5, voltage is≤0V, and between both positive and negative polarity 4=0V time, can judge that the dendrite lithium that the battery core of lithium battery analyses lithium has penetrated barrier film 10, battery core has started to produce heat, should take immediate steps.
Embodiment two of the present utility model is:
A kind of lithium battery, comprises battery core main body 1, housing 2, first voltmeter 11 and the second voltmeter 12; Described battery core main body 1 encapsulation is arranged in described housing 2; Described battery core main body 1 comprises the positive pole 3 be immersed in electrolyte, negative pole 4 and metal material and is coated with the reference electrode 5 of dielectric film;
Described positive pole 3, negative pole 4 and reference electrode 5 are respectively equipped with draws wire 6; The extraction wire 6 of described positive pole 3 is weldingly fixed on housing 2 and forms Positive Poles; The extraction wire 6 of described negative pole 4 is weldingly fixed on housing 2 and forms negative pole pole; The extraction wire 6 of described reference electrode 5 is the materials such as copper, nickel, stainless steel or titanium dioxide, connects successively to be weldingly fixed on housing 2 after positive pole 3 and negative pole 4 carry out short time charging to form the 3rd pole 9 after micro-electric current.
First voltmeter 11 connects positive pole 3 pole and negative pole 4 pole respectively; Second voltmeter 12 connects negative pole 4 pole and the 3rd pole 9 respectively.
In sum, a kind of lithium battery that the utility model provides, arranges reference electrode 5 in battery core main body 1 inside, and on housing 2, forms the first pole 7, second pole 8 and the 3rd pole 9 accordingly; Can be judged by the magnitude of voltage between monitoring reference electrode 5 and negative pole 4 whether battery core inside is short-circuited situation.Further, the lithium battery of the three electrode core struetures that the utility model provides, overall structure is simple, and processing technology is simple, and security performance is high, is easy to promote the use of.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalents utilizing the utility model specification and accompanying drawing content to do; or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present utility model.

Claims (6)

1. a lithium battery, is characterized in that, comprises battery core main body and housing, and described battery core main body encapsulation is arranged in described housing; Described battery core main body comprises positive pole, negative pole and reference electrode; Described positive pole, negative pole and reference electrode are respectively equipped with extraction wire;
The extraction wire of described positive pole is fixedly installed on housing and forms the first pole; The extraction wire of described negative pole is fixedly installed on housing and forms the second pole; The extraction wire of described reference electrode is fixedly installed on housing and forms the 3rd pole.
2. a kind of lithium battery as claimed in claim 1, is characterized in that, the material of described reference electrode is lithium metal; The extraction wire of described reference electrode is metallic nickel material or lug.
3. a kind of lithium battery as claimed in claim 1, is characterized in that, described reference electrode is the metal being coated with dielectric film; Described 3rd pole is connected successively after positive pole and negative pole charge by the extraction wire of reference electrode and is formed.
4. a kind of lithium battery as claimed in claim 3, is characterized in that, the material of described reference electrode is copper, nickel, stainless steel or titanium dioxide.
5. a kind of lithium battery as claimed in claim 1, is characterized in that, described reference electrode is between described positive pole and negative pole.
6. a kind of lithium battery as described in claim 1-5 any one, is characterized in that, also comprises the first voltmeter and the second voltmeter; Described first voltmeter connects the first pole and the second pole; Described second voltmeter connects the second pole and the 3rd pole.
CN201520598872.2U 2015-08-07 2015-08-07 A lithium battery Active CN204885311U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058302A (en) * 2016-06-25 2016-10-26 芜湖格利特新能源科技有限公司 Method for monitoring internal short circuit of battery cell employing three electrodes
CN106785068A (en) * 2017-01-08 2017-05-31 合肥国轩高科动力能源有限公司 A kind of three electrode soft-package batteries and preparation method thereof
CN107621608A (en) * 2017-08-30 2018-01-23 国家电网公司 A kind of 2V analysing valve control type lead-acid accumulator batteries polar plate sulfation detection method
CN108987836A (en) * 2018-06-15 2018-12-11 桑顿新能源科技有限公司 A kind of lithium ion battery three-electrode system and preparation method thereof
CN110007245A (en) * 2019-03-19 2019-07-12 合肥国轩高科动力能源有限公司 A kind of method of three electrode detections lithium ion battery N/P than design rationality

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106058302A (en) * 2016-06-25 2016-10-26 芜湖格利特新能源科技有限公司 Method for monitoring internal short circuit of battery cell employing three electrodes
CN106785068A (en) * 2017-01-08 2017-05-31 合肥国轩高科动力能源有限公司 A kind of three electrode soft-package batteries and preparation method thereof
CN106785068B (en) * 2017-01-08 2019-09-10 合肥国轩高科动力能源有限公司 Three electrode soft-package batteries of one kind and preparation method thereof
CN107621608A (en) * 2017-08-30 2018-01-23 国家电网公司 A kind of 2V analysing valve control type lead-acid accumulator batteries polar plate sulfation detection method
CN108987836A (en) * 2018-06-15 2018-12-11 桑顿新能源科技有限公司 A kind of lithium ion battery three-electrode system and preparation method thereof
CN110007245A (en) * 2019-03-19 2019-07-12 合肥国轩高科动力能源有限公司 A kind of method of three electrode detections lithium ion battery N/P than design rationality
CN110007245B (en) * 2019-03-19 2021-08-06 合肥国轩高科动力能源有限公司 Method for detecting N/P ratio design rationality of lithium ion battery by three electrodes

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