CN105428722A - High safety performance lithium ion battery and battery pack - Google Patents
High safety performance lithium ion battery and battery pack Download PDFInfo
- Publication number
- CN105428722A CN105428722A CN201510912725.2A CN201510912725A CN105428722A CN 105428722 A CN105428722 A CN 105428722A CN 201510912725 A CN201510912725 A CN 201510912725A CN 105428722 A CN105428722 A CN 105428722A
- Authority
- CN
- China
- Prior art keywords
- battery
- ion battery
- lithium ion
- box body
- fusing
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/598—Guarantee labels
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a high safety performance lithium ion battery, which comprises lithium ion battery monomers, wherein the lithium ion battery monomer comprise battery shells, electric cores with lugs and battery top covers with polar columns, the electric cores are stored in the battery shells, the battery top covers with the polar columns are arranged on the battery shells, electrolyte is filled in the battery shells, and conducive connecting fusing devices are conducted and electrically connected between the lugs of the electric cores and the polar columns of the battery top covers. The invention further discloses a battery pack of the high safety performance lithium ion battery. The battery pack of the high safety performance lithium ion battery comprises a plurality of lithium ion battery monomers which are connected in parallel and/or in series. The high safety performance lithium ion battery and the battery pack of the high safety performance lithium ion battery can automatically disconnect charging-discharging circuits when the temperature of a battery rises to a warning temperature, and prevent the battery and the battery pack from being over-charged, having a short circuit phenomenon or superheating, thereby greatly improving safety performance of the battery and the battery pack.
Description
Technical field
The present invention relates to technical field of lithium ion, especially relate to a kind of high-safety lithium ion battery and power brick.
Background technology
Since lithium ion battery comes out, due to it, to have operating voltage high, specific energy is large, self discharge is little, memory-less effect, the advantages such as life-span long and environmental pollution is little, become the secondary cell of the most promising and competitiveness at present, and show up prominently in the application such as electric automobile and energy storage.Meanwhile, the safety problem that lithium ion battery extensively exists also more and more is subject to people's attention, and has become the principal element of restriction high power capacity and the popularization of power-type lithium ion battery large-scale commercial.
Current cylindrical battery batch adopts PTC to protect it, improves the security performance of cylindrical battery to a great extent.But, be applied to the Large Copacity of energy storage and electric vehicle, protection mechanism that high-power lithium ion battery but lacks cell.The electric bus firing accident occurred this year overcharges by certain cell in power brick or short circuit causes, and has highlighted the seriousness of Large Copacity, high power lithium ion cell safety problem.And usual employing arranges safety valve or explosion-proof indentation and adopt ceramic diaphragm to improve large battery security in prior art, but these schemes all can not solve the problem of battery catches fire, blast from root, and its scheme is also more complicated.
Chinese patent literature (the day for announcing: on February 4th, 2015, notification number: CN104332658A) disclose a kind of high-safety lithium ion battery, it comprises pack case, be arranged on the positive plate in pack case, negative plate, electrolyte, be interval in the barrier film between positive plate and negative plate, described positive plate comprises plus plate current-collecting body and positive pole coating area, described positive pole coating area for apply anode active material layer on plus plate current-collecting body, described negative plate comprises negative current collector and negative pole coating area, described negative pole coating area for apply anode active material layer on negative current collector, described plus plate current-collecting body is provided with positive pole clear area, described positive pole coating area terminal part coated ceramic coating, when abusing battery, avoid the potential safety hazard that the larger energy of inside battery positive/negative plate direct short-circuit generation causes.
Chinese patent literature (the day for announcing: on May 2nd, 2012, notification number: CN102437370A) disclose a kind of lithium ion battery, comprise battery cover board, battery container, pole piece, electrolyte and refrigerator, pole piece, electrolyte and refrigerator are positioned at battery container, battery cover board and battery container are tightly connected, wherein, battery cover board and/or battery container are provided with safety valve, discharge fire-retardant gas when refrigerator and/or can be subject to more than 10Kg.f pressure at 80 ~ 150 DEG C.Battery of the present invention is when misapplying or abuse meets accident; inner refrigerator can absorb rapidly inside battery heat; reduce internal temperature of battery; realize refrigeration; particularly can discharge fire-retardant gas; the sensitive realization of safety valve can not only be contributed to and open power-off protection; and produce fire-retardant gas and be conducive to reducing the oxygen content of inside battery; reduce the reactivity of inside battery; cell internal environment is conducive to timely and effective termination battery thermal response; fundamentally control the generation of heat and gas, effectively improve the security performance of lithium battery.
Technique scheme is also adopt safety valve or ceramic diaphragm to improve large battery security, but these schemes all can not solve the problem of battery catches fire, blast from root, and its scheme is also more complicated.
Summary of the invention
First goal of the invention of the present invention is the problem that can not solve battery catches fire, blast in order to solve in prior art the scheme improving large battery security from root, and provide one automatically can be disconnected by discharge and recharge circuit when battery temperature is elevated to warning temperature, prevent that battery and power brick from overcharging, short circuit and overheated, greatly improve the security performance high-safety lithium ion battery of battery and power brick.
Second goal of the invention of the present invention is to provide a kind of power brick of high-safety lithium ion battery.
The present invention realizes the technical scheme that its first goal of the invention adopt: a kind of high-safety lithium ion battery, comprise lithium-ion battery monomer, described lithium-ion battery monomer comprises battery container, be contained in the battery core of the band lug of battery container inside and be located at the battery cap of the band pole on battery container, described battery container inside is perfused with electrolyte, is electrically connected with to conduct electricity to be connected device for fusing between described cell polar ear with battery cap pole.This lithium ion battery connects device for fusing by arranging a conduction between lug and pole, the normal discharge and recharge of battery and multiplying power can be met, also significantly the internal resistance of cell can not be increased, and this conduction connects the timely turn-off current loop of device for fusing when battery is warming up to warning temperature, prevent battery from heating up further, significantly improve the security performance of battery and power brick.The normal use of battery under big current can be ensured, and when battery temperature rises to warning temperature, can disconnect rapidly thus cut off current circuit, prevent battery from overcharging, short circuit and overheated, under the prerequisite not affecting battery performance, significantly improve its security performance.
As preferably, described conduction connects device for fusing and comprises conducting strip and fuse box, and described conducting strip divides the two ends that are located at fuse box and is interconnected after penetrating fuse box inside.The setting of conducting strip and fuse box; conducting strip is connected with cell polar ear and pole and realizes conducting function, and fuse box is then realize lithium ion battery because crossing thermal runaway, constantly soaring along with battery temperature; fuse when reaching the fusing point of fuse box, realize the protection to battery.
As preferably; described fuse box comprises protection box body and fuse link; described protection box body is airtight box body, and described protection tray interior is provided with cavity, described fuse link be arranged on inside cavity and respectively with through protecting the conducting strip of box body to be bonded into electric conductor.The said structure of fuse box can meet the normal discharge and recharge of battery and multiplying power, also significantly the internal resistance of cell can not be increased, and battery be warming up to warning temperature time timely turn-off current loop, prevent battery from heating up further, significantly improve the security performance of battery and power brick.Meanwhile, because fuse link is arranged in the protection box body of sealing, even if fusing also can not be overflowed flow into the internal short-circuit that battery core is caused in battery core pole piece inside.And recyclable recycling after the fusing of the fuse link of the low-melting alloy in fuse box, can avoid the rising of battery manufacture cost.
As preferably, described fuse link is made up of low-melting alloy, and the fusing point of described fuse link is 47 DEG C ~ 200 DEG C; The composition of described fuse link is selected from low-melting-point metal: two kinds in bismuth, tin, lead, indium and two or more.The composition of fuse link is the low-melting alloy of in bismuth (Bi), tin (Sn), the plumbous low-melting-point metal such as (Pb), indium (In) two kinds and two or more formation; like this when the fusing point of fuse link can set arbitrarily between 47 DEG C ~ 200 DEG C; to be applicable to the needs of different lithium ion battery; the fast fast thawing when battery temperature rising reaches the fusing point of fuse link is protected to fall, to protect battery.
As preferably; the organic plastic material that described protection box body is corroded by electrolyte resistance is made or the metal material that corroded by electrolyte resistance is made; described organic plastics is selected from one or more in polypropylene, polyethylene, polytetrafluoroethylene, and described metal material is selected from one or more in aluminium oxide, boron nitride, aluminium, copper, stainless steel.The organic plastics that protection box body can be corroded by electrolyte resistances such as polypropylene, polyethylene, polytetrafluoroethylene or the metal material that the electrolyte resistance such as the pottery that the electrolyte resistance such as aluminium oxide, boron nitride corrodes or aluminium, copper and stainless steel corrodes are made; such structure can preserve the metal liquid after fuse link fusing, prevents flowing into battery core pole piece inside and causes short circuit.Energy density is increased in order to alleviate battery weight, can preferred organic plastics.
As preferably, the inside cavity of described protection box body is filled with nitrogen or inert gas or is vacuum.Protection box body is sealing state, inside cavity vacuum-pumping, filling nitrogen or inert gas, can preserve the metal liquid after fuse link fusing like this, prevents flowing into battery core pole piece inside and causes short circuit.
As preferably, described conduction connects device for fusing and is arranged on the positive pole place of lithium-ion battery monomer or is arranged on lithium-ion battery monomer negative pole place or arranges respectively at the positive pole of lithium-ion battery monomer and negative pole place, and described conducting strip is copper sheet or aluminium flake or stainless steel substrates or copper nickel plating sheet.Conduction connection device for fusing can be arranged on positive pole, negative pole or both positive and negative polarity and all establish, because the thermotonus at battery positive pole ear place in charge and discharge process is the most responsive, so be preferably arranged on positive pole.
As preferably, battery cap is also provided with explosion-protection equipment, described explosion-protection equipment comprises explosionproof hole and is arranged on the burst disk on explosionproof hole.In order to protect the safety of battery further, battery cap is provided with explosion-protection equipment.
As preferably, described protection box body can be square, spherical or other arbitrary shapes.
As preferably, described fuse link can be sheet, cylindrical, square or other arbitrary shapes, preferably, and sheet.
As preferably, described fuse link can adopt with outside conducting strip and be threaded, squeeze flow, is clamped and connected, welds or bonding, preferred weld.
The present invention realizes the technical scheme that its second goal of the invention adopt: a kind of power brick of high-safety lithium ion battery, described power brick comprises the lithium-ion battery monomer of some parallel connections and/or series connection, described conduction connects device for fusing and comprises conducting strip and fuse box, described conducting strip divides the two ends that are located at fuse box and is interconnected after penetrating fuse box inside, described fuse box comprises protection box body and fuse link, described protection box body is airtight box body, described protection box inside is provided with cavity, described fuse link be arranged on inside cavity and respectively with through protecting the conducting strip of box body to be bonded into electric conductor.This power brick, is made up of the lithium ion battery comprising some parallel connections and/or series connection, and each lithium-ion battery monomer inside is provided with conduction and connects device for fusing.
As preferably, described lithium-ion battery monomer is also provided with conduction each other and connects device for fusing, and described conduction connects device for fusing and is connected electrically between the pole of adjacent two lithium-ion battery monomers.Lithium-ion battery monomer is also provided with conduction each other and connects device for fusing.
As preferably, described fuse link is made up of low-melting alloy, and the fusing point of described fuse link is 47 DEG C ~ 200 DEG C; The composition of described fuse link is selected from low-melting-point metal: two kinds in bismuth, tin, lead, indium and two or more.The composition of fuse link is the low-melting alloy of in bismuth (Bi), tin (Sn), the plumbous low-melting-point metal such as (Pb), indium (In) two kinds and two or more formation; like this when the fusing point of fuse link can set arbitrarily between 47 DEG C ~ 200 DEG C; to be applicable to the needs of different lithium ion battery; the fast fast thawing when battery temperature rising reaches the fusing point of fuse link is protected to fall, to protect battery.
As preferably; the organic plastic material that described protection box body is corroded by electrolyte resistance is made or the metal material that corroded by electrolyte resistance is made; described organic plastics is selected from one or more in polypropylene, polyethylene, polytetrafluoroethylene, and described metal material is selected from one or more in aluminium oxide, boron nitride, aluminium, copper, stainless steel.The organic plastics that protection box body can be corroded by electrolyte resistances such as polypropylene, polyethylene, polytetrafluoroethylene or the metal material that the electrolyte resistance such as the pottery that the electrolyte resistance such as aluminium oxide, boron nitride corrodes or aluminium, copper and stainless steel corrodes are made; such structure can preserve the metal liquid after fuse link fusing, prevents flowing into battery core pole piece inside and causes short circuit.Energy density is increased in order to alleviate battery weight, can preferred organic plastics.
As preferably, the inside cavity of described protection box body is filled with nitrogen or inert gas or is vacuum.Protection box body is sealing state, inside cavity vacuum-pumping, filling nitrogen or inert gas, can preserve the metal liquid after fuse link fusing like this, prevents flowing into battery core pole piece inside and causes short circuit.
As preferably, described conduction connects device for fusing and is arranged on the positive pole place of lithium-ion battery monomer or is arranged on lithium-ion battery monomer negative pole place or arranges respectively at the positive pole of lithium-ion battery monomer and negative pole place, and described conducting strip is copper sheet or aluminium flake or stainless steel substrates or copper nickel plating sheet.Conduction connection device for fusing can be arranged on positive pole, negative pole or both positive and negative polarity and all establish, because the thermotonus at battery positive pole ear place in charge and discharge process is the most responsive, so be preferably arranged on positive pole.
As preferably, battery cap is also provided with explosion-protection equipment, described explosion-protection equipment comprises explosionproof hole and is arranged on the burst disk on explosionproof hole.In order to protect the safety of battery further, battery cap is provided with explosion-protection equipment.
As preferably, described protection box body can be square, spherical or other arbitrary shapes.
As preferably, described fuse link can be sheet, cylindrical, square or other arbitrary shapes, preferably, and sheet.
As preferably, described fuse link can adopt with outside conducting strip and be threaded, squeeze flow, is clamped and connected, welds or bonding, preferred weld.
The invention has the beneficial effects as follows: the conduction that this high-safety lithium ion battery adopts connects device for fusing can meet the normal discharge and recharge of battery and multiplying power, also significantly the internal resistance of cell can not be increased, and battery be warming up to warning temperature time timely turn-off current loop, prevent battery from heating up further, significantly improve the security performance of battery and power brick.Meanwhile, because fuse link is arranged in the protection box body of sealing, even if fusing also can not be overflowed flow into the internal short-circuit that battery core is caused in battery core pole piece inside.Further, because fuse link adopts low-melting alloy formula, have flexibility, its fusing point can control arbitrarily to 200 DEG C from 47 DEG C, can meet the requirement of battery manufacture enterprise to various difference warning temperature.And the recyclable recycling of low-melting alloy fuse link in this fuse box, the rising of battery manufacture cost can be avoided.
This high-safety lithium ion battery, by to fuse link, low-melting alloy is adopted to carry out valve control to temperature value, its cross-sectional area is rationally set, can ensure the normal use of battery under big current, and when battery temperature rises to warning temperature, the fuse link be made up of low-melting alloy can disconnect rapidly thus cut off current circuit, prevent battery from overcharging, short circuit and overheated, under the prerequisite not affecting battery performance, significantly improve its security performance.
The power brick of this high-safety lithium ion battery, after lithium-ion battery monomer inside is provided with fuse box, certain overcharge or short circuit lithium-ion battery monomer can reach warning temperature time automatic turn-off current loop, prevent battery continue charging and heat up.Equally, overcharge and short circuit if whole power brick has met with, the fuse box be arranged between lithium-ion battery monomer inside or lithium-ion battery monomer can disconnect in time, avoids security incident to a great extent.
Accompanying drawing explanation
Fig. 1 is a kind of decomposition texture schematic diagram of high-safety lithium ion battery of the present invention;
Fig. 2 is a kind of structural representation of high-safety lithium ion battery of the present invention;
Fig. 3 is a kind of structural representation that in the present invention, conduction connects device for fusing;
Fig. 4 is the cutaway view that in Fig. 3, conduction connects device for fusing;
Fig. 5 is a kind of structural representation of the power brick of high-safety lithium ion battery of the present invention;
Fig. 6 is the another kind of structural representation of the power brick of high-safety lithium ion battery of the present invention;
In figure: 1, lithium-ion battery monomer, 2, battery container, 3, lug; 4, battery core, 5, pole, 6, battery cap; 7, conduction connects device for fusing, and 8, conducting strip, 9, fuse box; 10, box body is protected; 11, fuse link, 12, cavity, 13, explosion-protection equipment; 14, explosionproof hole, 15, burst disk.
Embodiment
Also by reference to the accompanying drawings technical scheme of the present invention is described in further detail below by specific embodiment.
Embodiment 1:
In the embodiment shown in Fig. 1, Fig. 2, a kind of high-safety lithium ion battery, comprise lithium-ion battery monomer 1, lithium-ion battery monomer 1 comprises battery container 2, be contained in the battery core 4 of the band lug 3 of battery container 2 inside and be located at the battery cap 6 of the band pole 5 on battery container 2, battery container 2 inside is perfused with electrolyte, is electrically connected with to conduct electricity to be connected device for fusing 7 between cell polar ear 3 with battery cap pole 5.Conduction connects device for fusing 7 and comprises conducting strip 8 and fuse box 9, and conducting strip 8 points is located at the two ends of fuse box 9 and is interconnected after penetrating fuse box 9 inside.
Fuse box 9 comprises protection box body 10 and fuse link 11(is shown in Fig. 3); protection box body 10 is airtight box body; protection box body 10 inside is provided with cavity 12, fuse link 11 be arranged on cavity 12 inner and respectively with through protecting the conducting strip 8 of box body 10 to be bonded into electric conductor (see figure 4).Fuse link 11 is made up of low-melting alloy, and the fusing point of fuse link 11 is 120 DEG C; The composition of fuse link 11 is synthesized by low-melting-point metal bismuth and tin.The organic plastic material that protection box body 10 is corroded by electrolyte resistance is made, and organic plastics is selected from polypropylene.Cavity 12 inside of protection box body 10 is filled with nitrogen.Conduction connects the positive pole place that device for fusing 7 is arranged on lithium-ion battery monomer 1, and conducting strip 8 is copper sheet.Battery cap 6 is also provided with explosion-protection equipment 13, the burst disk 15 that explosion-protection equipment 13 comprises explosionproof hole 14 and is arranged on explosionproof hole 14.
A kind of power brick (see figure 5) of high-safety lithium ion battery, power brick comprises the lithium-ion battery monomer 1 of some parallel connections, lithium-ion battery monomer 1 comprises battery container 2, be contained in the battery core 4 of the band lug 3 of battery container 2 inside and be located at the battery cap 6 of the band pole 5 on battery container 2, battery container 2 inside is perfused with electrolyte, is electrically connected with to conduct electricity to be connected device for fusing 7 between cell polar ear 3 with battery cap pole 5.Conduction connects device for fusing 7 and comprises conducting strip 8 and fuse box 9, and conducting strip 8 points is located at the two ends of fuse box 9 and is interconnected after penetrating fuse box 9 inside.Fuse box 9 comprises protection box body 10 and fuse link 11(is shown in Fig. 3); protection box body 10 is airtight box body; protection box body 10 inside is arranged on cavity 12, fuse link 11 be provided with cavity 12 inner and respectively with through protecting the conducting strip 8 of box body 10 to be bonded into electric conductor (see figure 4).Fuse link 11 is made up of low-melting alloy, and the fusing point of fuse link 11 is 120 DEG C; The composition of fuse link 11 is synthesized by low-melting-point metal bismuth and tin.The organic plastic material that protection box body 10 is corroded by electrolyte resistance is made, and organic plastics is selected from polypropylene.Cavity 12 inside of protection box body 10 is filled with nitrogen.Conduction connects the positive pole place that device for fusing 7 is arranged on lithium-ion battery monomer 1, and conducting strip 8 is copper sheet.Battery cap 6 is also provided with explosion-protection equipment 13, the burst disk 15 that explosion-protection equipment 13 comprises explosionproof hole 14 and is arranged on explosionproof hole 14.
Embodiment 2:
A kind of high-safety lithium ion battery, comprise lithium-ion battery monomer 1, lithium-ion battery monomer 1 comprises battery container 2, be contained in the battery core 4 of the band lug 3 of battery container 2 inside and be located at the battery cap 6 of the band pole 5 on battery container 2, battery container 2 inside is perfused with electrolyte, is electrically connected with to conduct electricity to be connected device for fusing 7 between cell polar ear 3 with battery cap pole 5.Conduction connects device for fusing 7 and comprises conducting strip 8 and fuse box 9, and conducting strip 8 points is located at the two ends of fuse box 9 and is interconnected after penetrating fuse box 9 inside.
Fuse box 9 comprises protection box body 10 and fuse link 11, and protection box body 10 be airtight box body, and protection box body 10 inside is provided with cavity 12, and it is inner and protect the conducting strip 8 of box body 10 to be bonded into electric conductor with passing respectively that fuse link 11 is arranged on cavity 12.Fuse link 11 is made up of low-melting alloy, and the fusing point of fuse link 11 is 47 DEG C; The composition of fuse link 11 is synthesized by low-melting-point metal tin, lead and indium.
The metal material that protection box body 10 is corroded by electrolyte resistance is made, and metal material is by the synthesis of aluminium oxide, boron nitride and aluminium.Cavity 12 inside of protection box body 10 is filled with inert gas.
Conduction connects the negative pole place that device for fusing 7 is arranged on lithium-ion battery monomer 1, and conducting strip 8 is stainless steel substrates.Battery cap 6 is also provided with explosion-protection equipment 13, the burst disk 15 that explosion-protection equipment 13 comprises explosionproof hole 14 and is arranged on explosionproof hole 14.
A kind of power brick (see figure 6) of high-safety lithium ion battery, technical scheme in this embodiment is substantially identical with the power brick in embodiment 1, difference is: power brick comprises the lithium-ion battery monomer 1 of some series connection, lithium-ion battery monomer 1 is also provided with conduction each other and connects device for fusing 7, and conduction connects device for fusing 7 and is connected electrically between the pole 5 of adjacent two lithium-ion battery monomers 1.
Embodiment 3
A kind of high-safety lithium ion battery in this embodiment is substantially identical with the technical scheme in embodiment 1, and difference is: fuse link 11 is made up of low-melting alloy, and the fusing point of fuse link 11 is 200 DEG C; The composition of fuse link 11 is by low-melting-point metal tin and plumbous synthesis.The organic plastic material that protection box body 10 is corroded by electrolyte resistance is made, and organic plastics is made up of polypropylene, polyethylene and polytetrafluoroethylene.Cavity 12 inside of protection box body 10 is vacuum.
Conduction connects positive pole and the negative pole place that device for fusing 7 is separately positioned on lithium-ion battery monomer 1, and conducting strip 8 is copper nickel plating sheet.
A kind of power brick of high-safety lithium ion battery in this embodiment, substantially identical with the power brick in embodiment 1, difference is: power brick comprises the lithium-ion battery monomer 1 of some parallel connections and series connection, each lithium-ion battery monomer 1 is provided with conduction and connects device for fusing 7, lithium-ion battery monomer 1 is also provided with conduction each other and connects device for fusing 7, and conduction connects device for fusing 7 and is connected electrically between the pole 5 of adjacent two lithium-ion battery monomers 1.
High-safety lithium ion battery shown in above-described embodiment, it comprises battery container, the battery core be contained in battery container, the electrolyte be poured in housing, be installed in the battery cap on battery container and the conduction between battery core with top cover is connected device for fusing 7, wherein, battery cap can also be provided with relief valve.
High-safety lithium ion battery described in above-described embodiment comprises: lithium-ion battery monomer 1, battery container 2, be installed in the battery core 4 in battery container 2, be poured into the electrolyte (not shown) in battery container 2, be installed on the battery cap 6 on battery container 2, and conduction connects device for fusing 7, battery cap 6 is provided with in positive terminal and negative terminal 5(diagram and will not distinguishes), battery cap 6 is also provided with explosionproof hole 14 and burst disk 15, burst disk 15 is arranged on explosion-proof 14, positive and negative terminals connects device for fusing 7 by conduction and is connected with the positive and negative lug (not shown) of battery core.Conduction connection device for fusing 7 can be arranged at positive pole, negative pole or both positive and negative polarity and all establish, and preferably, is arranged at positive pole, because the thermotonus at battery positive pole ear place in charge and discharge process is the most responsive.Conduction connects device for fusing 7 and comprises conducting strip 8 and fuse box 9, and fuse box 9 is made up of protection box body 10, fuse link 11 and cavity 12.Wherein, conducting strip 8 and fuse link 11 are in cavity 12 interior bonds, and cavity 12 can preserve the liquid metals after fuse link fusing, prevent it from flowing into battery core pole piece inside and cause battery short circuit.Conducting strip 8 can be copper sheet, aluminium flake, stainless steel substrates and copper nickel plating sheet, and shape can be sheet, cylindrical, square or other arbitrary shapes, preferably, for the ease of welding, selects sheet.The organic plastics that protection box body 10 is corroded by electrolyte resistances such as polypropylene, polyethylene, polytetrafluoroethylene or the metal material that the electrolyte resistance such as the pottery that the electrolyte resistance such as aluminium oxide, boron nitride corrodes or aluminium, copper and stainless steel corrodes are made; preferably; for increasing energy density, select organic plastics.Protect the inner vacuum-pumping of box body 10 simultaneously, fill nitrogen or inert gas.Further, box body 10 is protected to can be square, spherical or other arbitrary shapes.Fuse link 11 composition is the low-melting alloy of in bismuth (Bi), tin (Sn), the plumbous low-melting-point metal such as (Pb), indium (In) two kinds and two or more formation, fusing point is between 47 DEG C ~ 200 DEG C, preferably, because SEI fail temperature is at about 120 DEG C, not higher than 120 DEG C.Fuse link 11 can adopt with outside conducting strip 8 and be threaded, squeeze flow, is clamped and connected, welds or bonding, preferred weld.
The cause of usual lithium ion battery safety problem is thermal runaway, along with constantly riseing of battery temperature, there is various reaction in inside battery, such as: SEI decomposes between 80 ~ 120 DEG C, cause subsequently the graphite cathode of embedding lithium directly and electrolyte there is violent reduction reaction, constant temperature raises, and then causes the decomposition etc. of positive pole and electrolyte generation oxidation reaction and electrolyte.As the above analysis, battery temperature rises to 120 DEG C and is the omen that thermal runaway occurs, and the key preventing battery overheated is the decomposition stoping SEI, therefore must be disconnected by current circuit lower than when 120 DEG C at battery temperature, prevent battery from heating up further.
The conduction that this high-safety lithium ion battery adopts connects device for fusing 7 can meet the normal discharge and recharge of battery and multiplying power, also significantly the internal resistance of cell can not be increased, and battery be warming up to warning temperature time timely turn-off current loop, prevent battery from heating up further, significantly improve the security performance of battery and power brick.Meanwhile, because fuse link is arranged in the protection box body of sealing, even if fusing also can not be overflowed flow into the internal short-circuit that battery core is caused in battery core pole piece inside.Further, due to the flexibility of low-melting alloy formula, its fusing point can control arbitrarily to 200 DEG C from 47 DEG C, can meet the requirement of battery manufacture enterprise to various difference warning temperature.Further, the recyclable recycling of the low-melting alloy in this fuse box, can avoid the rising of battery manufacture cost.
And this lithium ion battery is not identical with conventional fuse, fuse mainly realizes valve control to current value, and namely when current value exceedes certain value, blown fuse plays a protective role.For current Large Copacity, high-power energy storage and lithium ion battery of electric automobile, hundreds of even goes up the electric current of kilo-ampere easily, can meet the demands without any a fuse.And the application adopts low-melting alloy to be carry out valve control to temperature value, as long as rationally arrange its cross-sectional area, the normal use of battery under big current can be ensured, and when battery temperature rises to warning temperature, the fuse link be made up of low-melting alloy can disconnect rapidly thus cut off current circuit, prevent battery from overcharging, short circuit and overheated, under the prerequisite not affecting battery performance, significantly improve its security performance.
The Fire explosion of usual power brick is all because overcharging of certain cell is caused with short circuit, after lithium-ion battery monomer inside is provided with fuse box, certain overcharge or short circuit cell can reach warning temperature time automatic turn-off current loop, prevent battery continue charging and heat up.Equally, overcharge and short circuit if whole power brick has met with, the fuse box be arranged between cell inside or battery can disconnect in time, avoids security incident to a great extent.
The assembling process of the lithium ion battery in above-described embodiment is as follows: battery core 4 loaded in battery container 2, and a certain amount of electrolyte is poured in battery container 2, the conducting strip 8 of fuse box 9 both sides is connected respectively to cell polar ear 3 with on the pole 5 of battery cap 6, then with battery cap 6, battery core 4 and electrolyte is packaged in battery container 2 inside.
Lithium ion battery has the following advantages: first, is connected device for fusing 7 and has larger electric current handling capacity, can not affect the normal use of battery by design fuse link 11 with the Assurance of Size conduction of conducting strip 8.Secondly; meet with at battery overcharge, short circuit, the operation such as overheated be when making battery temperature continue to raise; heat can be delivered to rapidly on fuse link 11; when reaching warning temperature (i.e. the fusing point of fuse link 11); fuse link 11 melts rapidly and flows in the cavity 12 of protection box body 10 inside; cut off current circuit, significantly improve the security performance of battery and power brick.Again, the fusing point of fuse link 11 can be selected from 47 DEG C ~ 200 DEG C flexibly according to different low-melting alloy formulas, ensure that the normal use of dissimilar different system battery, and its recoverable, substantially can not increase lithium ion battery production cost.
And the power brick in above-described embodiment, it comprises the lithium-ion battery monomer 1 of some parallel connections or series connection, is provided with conduction connects device for fusing 7 in each lithium-ion battery monomer inside.Or it comprises the lithium-ion battery monomer 1 of some parallel connections or series connection, between lithium-ion battery monomer 1 and lithium-ion battery monomer 1 inside be provided with conduction connect device for fusing 7.When one or more lithium-ion battery monomers 1 temperature in power brick reaches warning temperature, conduction between the inner or lithium-ion battery monomer 1 of lithium-ion battery monomer 1 connects the fuse link 11 arranged in device for fusing 7 and disconnects rapidly, cut off current circuit, prevent the battery temperature of potential safety hazard from raising further, significantly improve the security performance of power brick.
In above-mentioned illustrated embodiment, lithium ion battery is rectangular lithium ion battery.The profile of certain lithium ion battery is not particularly limited, and lithium ion battery also can be other shapes, such as column lithium ion battery and square lithium ion battery, even deformability lithium ion battery.
Claims (10)
1. a high-safety lithium ion battery, comprise lithium-ion battery monomer (1), described lithium-ion battery monomer (1) comprises battery container (2), is contained in the battery core (4) of the inner band lug (3) of battery container (2) and is located at the battery cap (6) of the band pole (5) on battery container (2), described battery container (2) inside is perfused with electrolyte, it is characterized in that: described cell polar ear (3) is connected device for fusing (7) with being electrically connected with between battery cap pole (5) to conduct electricity.
2. a kind of high-safety lithium ion battery according to claim 1, it is characterized in that: described conduction connects device for fusing (7) and comprises conducting strip (8) and fuse box (9), described conducting strip (8) point is located at the two ends of fuse box (9) and is interconnected after penetrating fuse box (9) inside.
3. a kind of high-safety lithium ion battery according to claim 2; it is characterized in that: described fuse box (9) comprises protection box body (10) and fuse link (11); described protection box body (10) is airtight box body; described protection box body (10) inside is provided with cavity (12), described fuse link (11) be arranged on cavity (12) inner and respectively with through protecting the conducting strip of box body (10) (8) to be bonded into electric conductor.
4. a kind of high-safety lithium ion battery according to claim 3, is characterized in that: described fuse link (11) is made up of low-melting alloy, and the fusing point of described fuse link (11) is 47 DEG C ~ 200 DEG C; The composition of described fuse link (11) is selected from low-melting-point metal: two kinds in bismuth, tin, lead, indium and two or more.
5. a kind of high-safety lithium ion battery according to claim 3, is characterized in that: the organic plastic material that described protection box body (10) is corroded by electrolyte resistance is made or the metal material that corroded by electrolyte resistance is made; Described organic plastics is selected from one or more in polypropylene, polyethylene, polytetrafluoroethylene; Described metal material is selected from one or more in aluminium oxide, boron nitride, aluminium, copper, stainless steel.
6. a kind of high-safety lithium ion battery according to claim 3, is characterized in that: cavity (12) inside of described protection box body (10) is filled with nitrogen or inert gas or is vacuum.
7. a kind of high-safety lithium ion battery according to Claims 2 or 3 or 4 or 5 or 6, it is characterized in that: described conduction connects device for fusing (7) and is arranged on the positive pole place of lithium-ion battery monomer (1) or is arranged on lithium-ion battery monomer negative pole place or arranges respectively at the positive pole of lithium-ion battery monomer and negative pole place, described conducting strip (8) is copper sheet or aluminium flake or stainless steel substrates or copper nickel plating sheet.
8. a kind of high-safety lithium ion battery according to claim 1 or 2 or 3 or 4 or 5 or 6, it is characterized in that: battery cap (6) is also provided with explosion-protection equipment (13), described explosion-protection equipment (13) comprises explosionproof hole (14) and is arranged on the burst disk (15) on explosionproof hole (14).
9. the power brick of a high-safety lithium ion battery according to claim 1, it is characterized in that: described power brick comprises the lithium-ion battery monomer (1) of some parallel connections and/or series connection, described conduction connects device for fusing (7) and comprises conducting strip (8) and fuse box (9), described conducting strip (8) point is located at the two ends of fuse box (9) and is interconnected after penetrating fuse box (9) inside, described fuse box (9) comprises protection box body (10) and fuse link (11), described protection box body (10) is airtight box body, described protection box body (10) inside is provided with cavity (12), described fuse link (11) be arranged on cavity (12) inner and respectively with through protecting the conducting strip of box body (10) (8) to be bonded into electric conductor.
10. the power brick of a kind of high-safety lithium ion battery according to claim 9, it is characterized in that: described lithium-ion battery monomer (1) is also provided with conduction each other and connects device for fusing (7), described conduction connects device for fusing (7) and is connected electrically between the pole (5) of adjacent two lithium-ion battery monomers (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912725.2A CN105428722A (en) | 2015-12-11 | 2015-12-11 | High safety performance lithium ion battery and battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912725.2A CN105428722A (en) | 2015-12-11 | 2015-12-11 | High safety performance lithium ion battery and battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105428722A true CN105428722A (en) | 2016-03-23 |
Family
ID=55506758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510912725.2A Pending CN105428722A (en) | 2015-12-11 | 2015-12-11 | High safety performance lithium ion battery and battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105428722A (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025369A (en) * | 2016-07-21 | 2016-10-12 | 深圳拓邦股份有限公司 | Lithium ion battery |
| CN106953125A (en) * | 2017-03-14 | 2017-07-14 | 深圳市海芝通电子股份有限公司 | The electric energy-storage system of lithium with function of safety protection |
| CN107681070A (en) * | 2017-08-30 | 2018-02-09 | 江苏春兰清洁能源研究院有限公司 | A kind of safe superstructure of secondary cell |
| CN108448021A (en) * | 2018-04-11 | 2018-08-24 | 东莞塔菲尔新能源科技有限公司 | A kind of battery modules |
| CN108923007A (en) * | 2018-08-21 | 2018-11-30 | 广东亿鑫丰智能装备股份有限公司 | A kind of effectively power battery modules |
| WO2019041144A1 (en) * | 2017-08-29 | 2019-03-07 | 宁德时代新能源科技股份有限公司 | Lithium-ion battery and lithium-ion battery pack |
| CN110854454A (en) * | 2019-11-20 | 2020-02-28 | 北京理工大学 | Temperature early warning device and method for lithium ion battery pack |
| CN111180798A (en) * | 2018-11-13 | 2020-05-19 | 宁德新能源科技有限公司 | Battery cell |
| CN111864155A (en) * | 2019-04-30 | 2020-10-30 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| CN112421187A (en) * | 2020-11-20 | 2021-02-26 | 合肥国轩高科动力能源有限公司 | Soft connecting sheet capable of improving safety performance of lithium ion battery |
| CN112490595A (en) * | 2020-11-06 | 2021-03-12 | 欣旺达电动汽车电池有限公司 | Electric connection assembly, battery and electric equipment |
| CN112542663A (en) * | 2019-09-20 | 2021-03-23 | 南京德朔实业有限公司 | Battery pack and electric tool adopting same |
| CN112946491A (en) * | 2021-01-22 | 2021-06-11 | 合肥国轩高科动力能源有限公司 | Device and method for testing safety of ternary lithium ion battery |
| CN113193309A (en) * | 2021-04-23 | 2021-07-30 | 胡定灏 | Application of fusible alloy in power battery |
| CN113270669A (en) * | 2021-06-17 | 2021-08-17 | 湖北亿纬动力有限公司 | Electrode cover plate and battery |
| CN113675456A (en) * | 2021-08-20 | 2021-11-19 | 夏秀明 | Power type lithium ion battery monomer, power battery pack and electric vehicle |
| CN114520400A (en) * | 2020-11-20 | 2022-05-20 | 比亚迪股份有限公司 | Intelligent connecting sheet, battery pack and vehicle |
| CN114583413A (en) * | 2022-02-28 | 2022-06-03 | 徐苗 | Device and method for preventing deflagration of lithium battery pack based on temperature fuse |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000090792A (en) * | 1998-07-15 | 2000-03-31 | Uchihashi Estec Co Ltd | Alloy type thermal fuse |
| CN2433729Y (en) * | 2000-08-10 | 2001-06-06 | 吕俊杰 | Thin temp. fuse |
| CN1795280A (en) * | 2003-05-29 | 2006-06-28 | 松下电器产业株式会社 | Temperature fuse element, temperature fuse and battery using the same |
| CN203674303U (en) * | 2013-11-22 | 2014-06-25 | 深圳市迪凯特电池科技有限公司 | Security structure for lithium ion battery |
-
2015
- 2015-12-11 CN CN201510912725.2A patent/CN105428722A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000090792A (en) * | 1998-07-15 | 2000-03-31 | Uchihashi Estec Co Ltd | Alloy type thermal fuse |
| CN2433729Y (en) * | 2000-08-10 | 2001-06-06 | 吕俊杰 | Thin temp. fuse |
| CN1795280A (en) * | 2003-05-29 | 2006-06-28 | 松下电器产业株式会社 | Temperature fuse element, temperature fuse and battery using the same |
| CN203674303U (en) * | 2013-11-22 | 2014-06-25 | 深圳市迪凯特电池科技有限公司 | Security structure for lithium ion battery |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106025369A (en) * | 2016-07-21 | 2016-10-12 | 深圳拓邦股份有限公司 | Lithium ion battery |
| CN106953125A (en) * | 2017-03-14 | 2017-07-14 | 深圳市海芝通电子股份有限公司 | The electric energy-storage system of lithium with function of safety protection |
| WO2019041144A1 (en) * | 2017-08-29 | 2019-03-07 | 宁德时代新能源科技股份有限公司 | Lithium-ion battery and lithium-ion battery pack |
| CN107681070A (en) * | 2017-08-30 | 2018-02-09 | 江苏春兰清洁能源研究院有限公司 | A kind of safe superstructure of secondary cell |
| CN108448021A (en) * | 2018-04-11 | 2018-08-24 | 东莞塔菲尔新能源科技有限公司 | A kind of battery modules |
| CN108923007A (en) * | 2018-08-21 | 2018-11-30 | 广东亿鑫丰智能装备股份有限公司 | A kind of effectively power battery modules |
| CN108923007B (en) * | 2018-08-21 | 2024-04-26 | 广东亿鑫丰智能装备股份有限公司 | High-efficiency power battery module |
| CN111180798A (en) * | 2018-11-13 | 2020-05-19 | 宁德新能源科技有限公司 | Battery cell |
| CN111864155A (en) * | 2019-04-30 | 2020-10-30 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| CN112542663A (en) * | 2019-09-20 | 2021-03-23 | 南京德朔实业有限公司 | Battery pack and electric tool adopting same |
| CN110854454A (en) * | 2019-11-20 | 2020-02-28 | 北京理工大学 | Temperature early warning device and method for lithium ion battery pack |
| CN110854454B (en) * | 2019-11-20 | 2020-12-25 | 北京理工大学 | Temperature early warning device and method for lithium ion battery pack |
| CN112490595A (en) * | 2020-11-06 | 2021-03-12 | 欣旺达电动汽车电池有限公司 | Electric connection assembly, battery and electric equipment |
| CN112421187A (en) * | 2020-11-20 | 2021-02-26 | 合肥国轩高科动力能源有限公司 | Soft connecting sheet capable of improving safety performance of lithium ion battery |
| CN114520400A (en) * | 2020-11-20 | 2022-05-20 | 比亚迪股份有限公司 | Intelligent connecting sheet, battery pack and vehicle |
| CN112946491A (en) * | 2021-01-22 | 2021-06-11 | 合肥国轩高科动力能源有限公司 | Device and method for testing safety of ternary lithium ion battery |
| CN113193309A (en) * | 2021-04-23 | 2021-07-30 | 胡定灏 | Application of fusible alloy in power battery |
| CN113270669A (en) * | 2021-06-17 | 2021-08-17 | 湖北亿纬动力有限公司 | Electrode cover plate and battery |
| CN113675456A (en) * | 2021-08-20 | 2021-11-19 | 夏秀明 | Power type lithium ion battery monomer, power battery pack and electric vehicle |
| CN114583413A (en) * | 2022-02-28 | 2022-06-03 | 徐苗 | Device and method for preventing deflagration of lithium battery pack based on temperature fuse |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105428722A (en) | High safety performance lithium ion battery and battery pack | |
| US9887413B2 (en) | Battery pack and connecting bar applied thereto | |
| US9577240B2 (en) | Battery module and bus bar applied to battery module | |
| KR100686844B1 (en) | Secondary battery with ptc device | |
| JP6156764B2 (en) | Connexing component for secondary battery and secondary battery including the same | |
| CN206059541U (en) | A kind of lithium ion battery cover board component of anti-overcharge excessively stream | |
| EP2827404B1 (en) | Connecting element for secondary battery, and battery module and battery pack including the same | |
| US20110086253A1 (en) | Electrochemical cell with an irreversible fuse | |
| EP3252845B1 (en) | Battery pack | |
| CN206947390U (en) | Battery explosion-proof cover plate assembly with external safety protection device easy to replace | |
| KR20150034498A (en) | Battery cell with venting cover and Secondary battery comprising the same | |
| WO2020192206A1 (en) | Battery, electrical apparatus and cell installation method | |
| KR20160068722A (en) | Battery module including bus bar for cutting off current flowing | |
| EP2793296B1 (en) | Electrode lead and secondary battery having the same | |
| CN201194237Y (en) | Battery cover and lithium ionic cell comprising the cover | |
| CN2881974Y (en) | Cylindrical battery protection cap | |
| CN207116559U (en) | Cell and power-supply device | |
| CN2845183Y (en) | Sefety explosion-proof screw cap of cylindrical lithium ion battery | |
| KR20140064093A (en) | Battery module with improved safety and bus bar applied for the same | |
| KR20180119319A (en) | Battery cell with improved safety | |
| CN207852798U (en) | A kind of secure mass soft package battery module | |
| CN101567436B (en) | Battery protector and battery with same | |
| CN111180798B (en) | Battery cell | |
| KR102167425B1 (en) | Protective Circuit For Secondary Battery and Method For Controlling Thereof | |
| CN207381439U (en) | Secondary cell cap assembly and secondary cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160323 |
|
| RJ01 | Rejection of invention patent application after publication |