CN202332981U

CN202332981U - Liquid-filled anti-explosion temperature-controlled lithium ion battery

Info

Publication number: CN202332981U
Application number: CN2011204927121U
Authority: CN
Inventors: 余建岳
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-09-26
Filing date: 2011-12-01
Publication date: 2012-07-11
Anticipated expiration: 2021-12-01

Abstract

The utility model provides a liquid-filled anti-explosion temperature-controlled lithium ion battery, which comprises a single lithium ion battery, wherein the single lithium ion battery is provided with an anode leading-out end and a cathode leading-out end. The liquid-filled anti-explosion temperature-controlled lithium ion battery is characterized in that a shell with a cavity is arranged at the periphery of the single lithium ion battery and filled with insulating liquid. The lithium ion battery always works in the insulating liquid which is isolated from air and is temperature-controlled, so that the problems of burning and explosion because lithium and oxygen are possible to be in contact when the battery is normal in the working process are effectively prevented; meanwhile, potential safety hazards, such as burning and explosion of the lithium ion battery caused by temperature rise of the battery due to external factors is effectively prevented; safety operation guarantee is provided for high-capacity and ultrahigh-capacity lithium ion batteries applied in energy-storage power stations, automobiles, steamships and other industrial applications; the service life of the battery is prolonged; and the electrical property and the safety property of the battery are improved.

Description

The explosion-proof temperature control lithium ion battery of a kind of topping up

Technical field

The utility model relates to a kind of lithium ion battery, relates in particular to explosion-proof and the lithium ion battery that can temperature control of a kind of topping up, belongs to the power battery technology field.

Background technology

Lithium ion battery is a kind of environmental protection battery, has energy, power density is big, and self discharge is little; Memory-less effect, operating temperature range wide (being-20 ℃～60 ℃), cycle performance is superior; But fast charging and discharging; And charge efficiency is up to more than 96%, and long service life does not contain advantages such as poisonous harmful substance.Existing lithium ion battery is all done negative pole with carbon materials, does positive pole with the compound that contains lithium, and through lithium ion coming and going or embedding between positive and negative electrode, accomplishes the charge or discharge of battery.When battery is charged; Lithium ion is deviate from from the positive pole of battery, embeds negative pole through electrolyte, because the negative pole of battery is the material with carbon element of layer structure; A lot of micropores are arranged on it; Thereby the lithium ion from positive pole is embedded in the micropore of carbon-coating, and the lithium ion of embedding is many more, and charging capacity is high more.Equally, when battery discharge (even using battery), the lithium ion that embeds in the negative pole carbon-coating micropore is deviate from, and returns and embed positive pole through electrolyte, and it is many more to return and embed anodal lithium ion, and discharge capacity is high more.Existing lithium ion battery comprises a hollow shell; This hollow shell is processed by steel, aluminium, nickel-clad iron, aluminium, plastics etc.; And on hollow shell, establish block, just the both positive and negative polarity exit of battery is contained in the organic electrolyte of shell hollow; Place positive pole, negative pole and the barrier film between them of electrolyte; Wherein, positive pole is the sheet of processing with active material such as LiMn2O4, cobalt acid lithium, nickle cobalt lithium manganate or LiFePO4, the electrolysis aluminium foil of the conductive current collector used thickness 10--20 micron on it; Negative pole is the sheet of processing with the carbon of active material such as graphite, approximate graphite-structure, the electrolytic copper foil of the conductive current collector used thickness 7-15 micron on it; Barrier film between the positive and negative electrode is a composite membrane, and its effect is when isolating battery plus-negative plate, only allows lithium ion to pass through, the insulation electronics; Organic electrolyte comprises carbonates solvent and the gluey electrolyte of polymer that wherein is dissolved with lithium hexafluoro phosphate.

Existing lithium ion battery is prone to cause security incident, that is: in charge and discharge process because of there being drawback; Can form dendrite because of the precipitating metal lithium, and then diaphragm, internal short-circuit caused; In case and short circuit will produce overcurrent, cause that temperature sharply rises, thereby cause the oxidized and reduction of low-flash, low boiling carbonic ester in the electrolyte; And produce a large amount of gases and more thermal energy, when these gases and heat energy have little time to discharge, inner pressure of battery is sharply risen and set off an explosion; As far as using the gluey electrolytical lithium ion battery of polymer, also can Yin Wendu raise and more fierce burning takes place; In addition,, burn and the electrolyte that ignites at once, strong flame takes place and make the gas rapid expansion, set off an explosion when the lithium metal of separating out directly contacts with air.In addition, lithium ion battery is when high and low temperature, and performance also can receive very big influence.

Although existing lithium ion battery all is provided with and followingly overcharges, cross and protective measure such as put: the one, adopt switch element, the resistance of utilizing switch element is stopped power supply with the characteristic that temperature rises and increases automatically; The 2nd, select suitable separator material, make micron order micropore on the dividing plate when temperature rises to set point, can dissolve automatically, thereby passing through of blocking-up lithium ion stops the reaction of inside battery; The 3rd, safety valve (being exactly the air vent at battery top) is set, when cell internal pressure rose to set point, safety valve was opened the venting release automatically, too much deformation took place to prevent the inside battery gas build, finally caused the housing explosion.But its potential safety hazard still can't be avoided.Especially use high power capacity, high-power drive pond in energy-accumulating power station, automobile, steamer and other industrial products, more need obtain safe and reliable guarantee.

Summary of the invention

The purpose of the utility model is to provide a kind of topping up explosion-proof temperature control lithium ion battery, fundamentally solves safe operation problems such as lithium ion battery is inflammable, explosive, improves useful life and other many performance of battery simultaneously.

The utility model provides the explosion-proof temperature control lithium ion battery of a kind of like this topping up; The lithium-ion battery monomer that comprises band positive and negative electrode exit on it; It is characterized in that being provided with the shell of a band cavity in the lithium-ion battery monomer periphery; And in cavity pocket of outer cover, inject iknsulating liquid, and lithium-ion battery monomer is immersed in the iknsulating liquid, can cool through iknsulating liquid on the one hand; Can effectively isolate contacting of lithium-ion battery monomer and air through iknsulating liquid on the other hand, thereby reach the explosion-proof purpose of temperature control.

Said shell shell wall is provided with through hole, and the positive and negative electrode exit of lithium-ion battery monomer passes through hole and stretches out outside the shell, so that electric energy to be provided.

Through hole on the said shell wall links to each other with pipeline, and pipeline links to each other with heat exchanger, so that after iknsulating liquid introduced in the heat exchanger cooling, return, realizes the temperature control of lithium-ion battery monomer again.

The outer wall of said shell is provided with fin, so that through the fin heat radiation, promptly lithium-ion battery monomer is carried out air cooling, realizes temperature control.

Said shell is provided with the fin of band cavity, and the cavity of fin is communicated with cavity pocket of outer cover, so that lithium-ion battery monomer is carried out air cooling, and the realization temperature control.

The preferred transformer oil of said iknsulating liquid.

Said lithium-ion battery monomer comprises the housing of a band cavity, with and go up the cap of band exit, be located at electrolyte and positive pole, the negative pole of mutual superposition in the housing cavity; Barrier film is set between positive and negative electrode; Conduction afflux aluminium foil and conduction afflux Copper Foil are set respectively in the positive and negative electrode both sides, and conduction afflux aluminium foil on the positive pole and the conduction afflux Copper Foil mutual dislocation on the negative pole, to realize two-way afflux; Balanced charge and discharge prolong battery useful life.

Establish through hole on the said conduction afflux aluminium foil, conduction afflux rod passes this through hole and extends to cap and become anodal exit outward.

Establish through hole on the said conduction afflux Copper Foil, conduction afflux rod passes this through hole and extends to cap and become the negative pole exit outward.

The utlity model has advantage and effect: adopt such scheme; Lithium ion battery is always worked in the iknsulating liquid of and controllable temperature isolated with air; Effectively prevent in the battery operated process unusual because of occurring; And might cause lithium to contact with oxygen, thus cause the problem of burning, blast, effectively prevent simultaneously to cause potential safety hazards such as lithium ion battery burning, blast because of the outside batteries factor causes temperature to raise; Be lithium ion battery; Especially use big capacity and vast capacity lithium ion battery in energy-accumulating power station, automobile, steamer and other commercial Application that the safe operation guarantee is provided, prolong battery useful life, improve the electrical property and the security performance of battery.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is another structural representation of the utility model;

Fig. 3 is the cross-section structure of Fig. 2;

Fig. 4 is the another structural representation of utility model;

Fig. 5 is the cross-section structure of Fig. 4.

Embodiment

Below in conjunction with accompanying drawing the utility model is done to further describe, be not limited thereto but hold within the utility model.

The explosion-proof temperature control lithium ion battery of the topping up that the utility model provides; The lithium-ion battery monomer 1 that comprises band positive and

negative electrode exit

3,31 on it; The shell 5 of one band cavity 4 is set in lithium-ion battery monomer 1 periphery; And injection transformer is oily in shell 5 cavitys 4, and lithium-ion battery monomer 1 is immersed in the transformer oil, can cool through transformer oil on the one hand; Can effectively isolate contacting of lithium-ion battery monomer 1 and air through transformer oil on the other hand, thereby reach the explosion-proof purpose of temperature control; Said shell 5 shell walls are provided with through hole 2, and the positive and

negative electrode exit

3,31 of lithium-ion battery monomer 1 passes through hole 2 and stretches out outside the shell 5, so that electric energy to be provided; Through

hole

6,12 on said shell 5 walls links to each other with

pipeline

7,11, and

pipeline

7,11 links to each other with heat exchanger 8, establishes cooling water pipe in the heat exchanger 8; Arrival end 9, the port of export 10 of cooling water pipe link to each other with refrigeration machine respectively; So that iknsulating liquid is introduced in the heat exchanger 8, after the coolant cooling, return again; Realize the temperature control of lithium-ion battery monomer 1, like Fig. 1; Be arranged with four groups of fins 22 on the outer wall of said shell 5, establish three fins 22 for every group,, thereby lithium-ion battery monomer 1 is carried out air cooling, realize temperature control, like Fig. 2, Fig. 3 so that through fin 22 heat radiations; Be arranged with the fin 23 of two groups of band cavitys 24 on the said shell 5, establish two fins 23 for every group, the cavity 24 of each fin 23 is communicated with shell 5 cavitys 4, so that lithium-ion battery monomer 1 is carried out air cooling, realizes temperature control, like Fig. 4, Fig. 5.

Said lithium-ion battery monomer 1 comprises the housing 14 of a band cavity 13; With and go up the cap 20 of

band exit

3,31; Be located at electrolyte and positive pole 15, the negative pole 18 of mutual superposition in housing 14 cavitys 13, between anodal 15, negative pole 18, barrier film 19 be set, conduction afflux aluminium foil 16 and conduction afflux Copper Foil 21 are set respectively in positive and

negative electrode

15,18 both sides; And conduction afflux Copper Foil 21 mutual dislocation on conduction afflux aluminium foil on the positive pole 16 and the negative pole; Realizing two-way afflux, balanced charge and discharge prolong battery useful life; Establish through hole 25 on the said conduction afflux aluminium foil 16; Conduction afflux rod 17 passes this through hole 25 and extends to that cap 20 is outer to become anodal exit 3; Like Fig. 1; Establish through hole 25 on the said conduction afflux Copper Foil 21, conduction afflux rod 17 passes this through hole 25 and extends to that cap 20 is outer to become negative pole exit 31, like Fig. 1, Fig. 3.

Claims

1. the explosion-proof temperature control lithium ion battery of topping up comprises the lithium-ion battery monomer of being with the positive and negative electrode exit on it, it is characterized in that being provided with in the lithium-ion battery monomer periphery shell of a band cavity, and in cavity pocket of outer cover, injects iknsulating liquid.

2. the explosion-proof temperature control lithium ion battery of topping up according to claim 1 is characterized in that said shell shell wall is provided with through hole, and the positive and negative electrode exit of lithium-ion battery monomer passes through hole and stretches out outside the shell.

3. the explosion-proof temperature control lithium ion battery of topping up according to claim 1 is characterized in that the through hole on the said shell wall links to each other with pipeline, and pipeline links to each other with heat exchanger.

4. the explosion-proof temperature control lithium ion battery of topping up according to claim 1 is characterized in that the outer wall of said shell is provided with fin.

5. the explosion-proof temperature control lithium ion battery of topping up according to claim 1 it is characterized in that said shell is provided with the fin of band cavity, and the cavity of fin is communicated with cavity pocket of outer cover.

6. the explosion-proof temperature control lithium ion battery of topping up according to claim 1 is characterized in that the preferred transformer oil of said iknsulating liquid.