CN101467282A - Battery pack - Google Patents
Battery pack Download PDFInfo
- Publication number
- CN101467282A CN101467282A CNA2006800296663A CN200680029666A CN101467282A CN 101467282 A CN101467282 A CN 101467282A CN A2006800296663 A CNA2006800296663 A CN A2006800296663A CN 200680029666 A CN200680029666 A CN 200680029666A CN 101467282 A CN101467282 A CN 101467282A
- Authority
- CN
- China
- Prior art keywords
- mentioned
- battery
- lamination
- electrolyte
- edge
- 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
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
A battery cell 101 has an internal structure where after building up an assembled unit by stacking positive-and negative-electrode materials 110, 111 and a separator 112 in some layers, the assembled units, together with an electrolyte, are sealed with aluminum laminates 114, 114. The battery pack 1 comprises cell assemblies 102 formed by stacking one on top of another in a plurality of the battery cells 101. A deformation-preventive plate 2 is inserted into a portion between each of the battery cells 101 stacked. The cell assemblies 102 inserted by the deformation-preventive plates 2 between each of the battery cells are pressed by cell assembly pressing plates 3, 3 from the upper and lower sides of the battery assemblies. The cell assemblies 102 are pressed by the cell assembly pressing plates 3, 3 to be subjected to some degree of pressure. Hence, the cell assemblies 102 expand not largely to be maintained as an approximately the same form as that at a normal time.
Description
Technical field
Present invention is directed to the power supply battery of lithium secondary battery etc. for example that is used for various electronic installations.
Background technology
Generally speaking, in needing the non-break power supply of backup battery, under the situation about normally producing from the input voltage of commercial ac power source, from main power source portion needed direct current or alternating voltage are supplied to load as the power supply body of electronic installation, and via this main power source portion to secondary cell charge, on the other hand, when above-mentioned input voltage reduces or have a power failure, be connected to load and supply capability from main power source portion as the secondary cell of backup battery.In the secondary cell that this made is employed lead accumulator in the known techniques, and its reason mainly is that cheapness and management of charging and discharging are simple.
But the non-break power supply that carries lead accumulator is under the prerequisite that must guarantee more battery container space, and it is extremely heavy that weight becomes, and with regard to the environment face, uses lead also can cause various problems.In order to solve relevant various shortcomings, for example in patent documentation 1, replace lead accumulator with lithium secondary battery and propose non-break power supply as backup battery.The battery module that lithium secondary battery herein is in series by a plurality of battery units (battery) constitutes, in keep and prevent to overcharge and the battery protecting circuit of overdischarge.
In patent documentation 2, disclosed and possessed over circuit and additives for overcharge protection circuit, the secondary cell casket of the casket shape of built-in lithium secondary battery again.
Though in known techniques, used prevailingly as the lead accumulator of secondary cell, the lithium battery as the Miniaturizable with very high power density of electric power storage medium is widely used in recent years.So the 9th figure that is configured in of lithium battery casket represents.In the lithium battery casket,, be the diagram dihedral herein though mainly be cylindrical shape and dihedral.In same figure; battery 100 is in order to become set voltage, capacity, and a plurality of flat tabular battery units 101 are connected electrically and overlapped up and down, and the cell stack of formation becomes group unit 102; carrying battery protecting circuit 103 at its topmost, be accommodated in the housing 104 of case shape.
The internal structure of the stacking type lithium battery of a kind of form of expression lithium battery in the 10th figure.As the battery 101 of stacking type lithium battery at for example cobalt acid lithium (LiCoO
2) or LiMn2O4 (LiMnO
2) wait between the negative materials 111 such as positive electrode 110 and for example carbon, insert the separator 112 of for example polyethylene of insulation usefulness or the micro-porous film of polypropylene system etc., after these are accumulated to certain layer lamination tectosome 113, this lamination tectosome 113 with electrolyte from top to bottom with 114,114 sealings of aluminium laminated board.On positive electrode 110 and negative material 111, form anode electrode 110a and negative electrode 111a respectively, partly outside portion is outstanding from the applying of aluminium laminated board 114,114.
Patent documentation 1: the spy opens the 2002-58170 communique
Patent documentation 2: specially permit communique No. 2861879
Patent documentation 3: the spy opens flat 11-283599 communique
Patent documentation 4: specially permit communique No. 2861879
Under the situation as the lithium battery of the outer dress of the lamination of battery unit 10, when apply owing to overcharging the quota more than voltage the time, because the decomposition meeting of electrolyte produces gas in the inside of aluminium laminated board 114,114, aluminium laminated board 114,114 itself expands and gas enters between the lamination of the positive electrode 110 of battery unit 101 inside or negative material 111 and separator 112 and causes the collapse of lamination structure to be out of shape.If this situation continues, the thermal welding portion of aluminium laminated board 114,114 is open, and the gas leakage after electrolyte and the gasification is to outside, and battery unit 101 temperature inside slowly rise, and inner lamination structure is out of shape more.Then, when battery unit 101 inside reach the solution temperature (fracture temperature) of separator 112, because battery unit 101 internal modifications produce temperature inequality, the rapid rising of temperature that can produce locality on the face of separator 112.By this, original was that purpose inserts that separator 112 between positive electrode 110 and the negative material 111 produces the dissolving of part on the whole and ineffective with the insulation, produce short circuit between positive electrode 110 and the negative material 111, the result produces sudden and violent the dashing of heat and the anxiety that has battery unit 101 to be fuming.
At the inner flammable internal gas that produce of battery unit 101 for example because overvoltage and the boil-off gas (diethyl carbide, ethene carbide) that produces from electrolyte or because sudden and violent the dashing of heat and from CH that electrolyte produced
4, C
2H
4, C
2H
6Deng, when battery unit 101 overcharges etc., cause the expansion of aluminium laminated board 114,114 at inside battery generation internal gas.At this moment, such as patent documentation 3 exposure owing to explosion-proof valve etc. is set, when the pressure in the battery rises to set value when above as the certain ejection portion of the emission direction that makes internal gas, the internal gas of battery is discarded to outside the battery from this explosion-proof valve, and is explosion-proof by removing gas.
So, battery unit 101 produces internal gas owing to overcharging, and the worst situation is fuming in addition, the anxiety of ignition.In this,, usually, be to be installed in this battery as the protective circuit (for example patent documentation 4) as for the battery protecting circuit of being fuming, getting angry 103 that prevents battery as the countermeasure that solves the problem on the safety.In patent documentation 4, possess over circuit or additives for overcharge protection circuit, forbid discharging and recharging of secondary cell when discharging and recharging excessively, and preventing being fuming, getting angry of battery by this.Generally speaking, this protective circuit as mentioned above, is equipped on that a plurality of battery units 101 overlap up and down and the topmost of the cell stack that forms when in fact battery unit 101 is installed in the battery.
But,, also have for some reason and the situation that can't act on even above-mentioned protective circuit is set.At this moment,, be provided with and prevent from the above-mentioned known explosion-proof valve that breaks to make flammable internal gas ejection towards temperature cruelly owing to arrive heat though produce internal gas owing to overcharging etc., easy of internal short-circuit is fuming, is got angry.Therefore, the sudden and violent stage in advance before temperature of arrival heat can positively be guaranteed safety, wishes to have institutional Security Countermeasures.
In the known techniques, owing to goodsization towards high power capacity are not advanced, the fail safe under overcharging only considers that under its situation that can't act on, the self-criticism of fail safe can't be carried out as the electric property protective circuit as the battery protecting circuit 103.Group unit 102 in the mechanism is because mechanical vibration that external factor caused or impact countermeasure and insert the position standard of housing 104 and carry out institutional design.So, only because the designed housing 104 (mechanism) of external factor though in 104 of housings as strong assembly, inner group unit 102 (or battery unit 101 monomers) has the gap between separator 104, group unit 102 is own motionless owing to vibration, impact etc., because it is accurate that the group unary system is fixed in the position of housing 104, battery unit 101 (group unit 102) is out of shape because of overcharging easily.Only consider the housing 104 of external factor, as previously mentioned, expansion, the distortion of overcharging and being caused are dashed cruelly because of internal short-circuit causes heat, in housing 104 inside, in press and rise or group element deformation (expansion) and cause and produce pressure internally.At this moment, if the air-tightness height of housing 104, then housing 104 has the possibility of breaking or being out of shape.
Again, under the situation of lithium battery, owing to consider general fail safe, battery and protective circuit are a pair of, and usually, battery and protective circuit are approaching and dispose.That is, though group unit 102 is to be accommodated in the housing 104 as battery unit with battery protecting circuit 103, group unit 102 is considered external factor and is fixed in the housing 104 under motionless situation.At this moment; when cause battery unit 101 distortion owing to overcharging heat cruelly towards the time; battery protecting circuit 103 is approaching owing to produce being fuming of a great deal of in housing 104 inside; by circuit or be out of shape between the heteropole of caused unit portion of terminal, promptly may produce the phenomenon of short circuit between anode electrode 110a and the negative electrode 111a.
Summary of the invention
In this, in view of this, first purpose of the present invention is for providing a kind of battery, prevents the distortion of the unit that causes by overcharging, and carries out institutional Security Countermeasures.
Second purpose of the present invention is for providing a kind of battery, makes battery ineffective and can guarantee safety at superpotential commitment.
In battery of the present invention, between positive electrode and negative material, insert the separator of insulation usefulness, make the lamination tectosome of these laminations adorn the cell body of sealing outward with lamination with plural layer overlapping and formation Battery pack body with electrolyte, wherein between the above-mentioned cell body of above-mentioned Battery pack body, insert the deformable members that prevents of hard, be provided with simultaneously the above-mentioned Battery pack body of pushing all and prevent each cell body distortion prevent anamorphic attachment for cinemascope.
So; even the protection of electric property was lost efficacy; be out of shape material and prevent anamorphic attachment for cinemascope by preventing; because the expansion of battery unit can be suppressed institutionally; when overcharging etc.; even produce gas owing to the decomposition of electrolyte in cell body, the lamination structure in each cell body can not crumble yet.If the lamination structure does not produce distortion, by the impedance operator of separator, before the temperature of separator arrived solution temperature, the electric current of cell body reduced, and the temperature of cell body rises and is suppressed, and can not cause heat to be dashed cruelly.
Again, in battery of the present invention, the above-mentioned anamorphic attachment for cinemascope that prevents is that above-mentioned Battery pack body all is pressed into inner housing.
So, utilize the expansion of taking in the housing of Battery pack body and can easily prevent cell body.
In battery of the present invention, above-mentioned deformation element and/or the above-mentioned anamorphic attachment for cinemascope system that prevents of preventing uses the good heat release member of heat conductivity again.
So, prevent that by the distortion that is present between each cell body member and/or the anti-locking apparatus of distortion from constituting the heat heat release post of each battery pack.
Again, in battery of the present invention, the above-mentioned deformation element system that prevents uses the heat insulating component with thermal insulation.
So, utilize the heat insulating component can be separately or with the unit to be that unit is done cell body heat insulation, the temperature that can prevent cell body rises and involves other.
Again, in the battery of invention, be provided with the electrolyte releasing device on above-mentioned cell body, the interior pressure that decomposition gas produced of electrolyte is opened the sealing of the outer dress of above-mentioned lamination, and above-mentioned electrolyte is emitted towards the outside.
So, owing to electrolyte decomposes with set overvoltage, utilize the interior pressure that decomposition gas produced that is produced, stage makes the sealing of the outer dress of lamination open in early days, and electrolyte is emitted towards the secondary cell outside, because the electrolyte in secondary cell inside reduces, secondary cell becomes the impedance body with impedance, can be suppressed at inner because the heating temperature that causes own rises.
The present invention can provide a kind of battery, prevents because the distortion of the cell body that caused of overcharging, and the Security Countermeasures of enforcement body's property.
The present invention can utilize existing structure and carry out institutional Security Countermeasures again.
According to the present invention, even each cell body heating when discharging and recharging, heat is heat release promptly also, can prevent that each cell body from becoming the state of high temperature.
Again, the invention provides a kind of secondary cell,, make battery ineffective, can guarantee safety at superpotential commitment.
Description of drawings
The 1st figure is the longitudinal section of the major part of the battery among the present invention's first embodiment.
The 2nd figure is the longitudinal section of the major part of the battery among the present invention's second embodiment.
The 3rd figure is the longitudinal section of major part of the variation of the same expression battery.
The 4th figure is the longitudinal section of major part of other variation of the same expression battery.
The 5th figure be the secondary cell of expression in the various embodiments of the present invention first variation feature portion structure remove a part of plane graph.
The 6th figure be the secondary cell of expression in the various embodiments of the present invention second variation feature portion structure remove a part of plane graph.
The 7th figure be the secondary cell of expression in the various embodiments of the present invention the 3rd variation feature portion structure remove a part of plane graph.
The 8th figure be the secondary cell of expression in the various embodiments of the present invention the 4th variation feature portion structure remove a part of plane graph.
The 9th figure is the in-built stereogram of the battery in the known example.
The 10th figure is the in-built exploded perspective view of the same lamination type lithium battery.
Symbol description is as follows:
1～battery
2～prevent deformed plate (preventing anamorphic attachment for cinemascope)
3～group unit pressing plate (preventing anamorphic attachment for cinemascope)
10,20,30～battery
11,21,31～housing (preventing anamorphic attachment for cinemascope)
41,51,61,71～battery unit (secondary cell)
43a, 43b, 43c, 43d～narrow thermal welding portion (electrolyte discharge device)
101～battery (cell body)
102～group unit (Battery pack body)
110～positive electrode
111～negative material
112～separator
113～lamination tectosome
114～aluminium laminated board (lamination is adorned outward)
Embodiment
Following with reference to annexed drawings, the preferred embodiment of battery of the present invention is described.And, give identical symbol to identical position, so the explanation of common part is owing to repeat to omit as far as possible.
The 1st figure is the cutaway view of the structure of battery among this first embodiment, is to use and the identical battery of lithium battery shown in the known example as the battery unit 101 of the cell body that constitutes battery 1.That is, the inside of battery unit 101, positive electrode 110, negative material 111 overlap with several layers with separator 112 and after forming lamination tectosome 113, seal with aluminium laminated board 114 with electrolyte.Even in the present embodiment, in battery 1, in order to reach set voltage, capacity, the object that a plurality of flat tabular battery units 101 are done the series connection of electric property ground overlaps up and down and forms the group unit 102 of Battery pack body, sandwiches between each battery unit 101 of lamination as what prevent deformation element and prevents deformed plate 2.
Prevent deformed plate 2 for preventing the assembly of battery unit 101 distortion, the size towards 112 whole of the separators of battery unit 101 is necessary at least.Again, the material, thickness that prevents deformed plate 2 for the metal of for example aluminium, iron, copper etc. or resin etc. so long as the expansive force of the battery unit 101 that is produced when overcharging can not make the material of the hardness of its distortion, hardness get final product.
To prevent that so deformed plate 2 from inserting group unit 102 between each battery unit 101 under the state of above-below direction by push plate 3,3 pushings of group unit, is accommodated in the housing 104 of case shape.Particularly, tighten is accommodated in the housing 104 to organize pressing plate 3,3 clamping group unit 102, unit, to use the not shown end tool that for example sticks together adhesive tape or end band etc.This group unit pressing plate 3 is formed by the hard material identical with preventing deformed plate 2, and prevents that deformed plate 2 is identical and will have at least towards the size of 112 whole of the separators of battery unit 101.In the present embodiment, for the unit of pushing group positively 102 integral body, prevent the shape that plate 2 is also bigger than battery unit 101 or distortion.The pressure of pushing group unit 102 must not damage characteristic (characteristic of battery), life-span and the reliability of battery unit 101.Again, a side of pushing also can be the structure that group unit 102 pushes in the plane fifty-fifty itself.When this pressure put on the plane unequally, lamination can produce the part deterioration in anode electrode 110a, negative electrode 111a, the separator 112 of battery unit 101 inside, and may the accelerated aging deterioration.On the contrary, do on the plane when pushing fifty-fifty when battery unit 101 itself, owing to be difficult to produce the part deterioration that the part inequality is caused in the plane by discharging and recharging, life characteristic also can improve.
The battery unit 101 of present embodiment prevents the member that is connected to battery unit 101 of deformed plate 2 and group unit pressing plate 3 etc. owing to be the long-pending outer dress of aluminium lamination, in order not damage aluminium laminated board 114,114, must be noted that burr etc.Its countermeasure is to insert insulating trip between battery unit 101, or originally implements insulation coating on one's body or attach adhesive tape at the member that prevents deformed plate 2 and group unit pressing plate 3 etc.
Then, the explanation that is used as that prevents deformed plate 2 and group unit pressing plate 3,3 when overcharging etc.Group unit 102 is by pressing plate 3,3 pushings of group unit, owing to apply pressure to a certain degree, each battery unit 101 of formation group unit 102 is also restrained at group unit pressing plate 3,3 or is prevented between the deformed plate 2, even also can not expand when overcharging etc. with just often keep identical shape generally.At this moment, in battery unit 101 inside, the leeway that between the lamination of positive electrode 110 or negative material 111 and separator 112, does not have gas to enter, the lamination structure can not crumble.Therefore, do not have the inequality of temperature on the face of separator 112, promptly separator 112 heats fifty-fifty on comprehensively and temperature is risen.On separator 112 the general material that uses owing to have and the rise characteristic of proportional increase impedance of temperature, characteristic by this separator 112, if do not produce distortion in that lamination is textural, the temperature of separator 112 is for arriving the preceding temperature of solution temperature, contraction by separator 112 increases interelectrode impedance, produces before dissolving, the internal short-circuit again, and the electric current of battery unit 101 reduces, be suppressed because the temperature of battery unit 101 rises, can not cause heat to be dashed cruelly.Again, contacting and push to a certain degree done by the anode electrode 110a that is produced by element deformation and the heteropole portion of negative electrode 111a.So, the distortion of the battery unit 101 that caused of preventing to overcharge by the variation of the impedance that temperature caused that utilizes separator 112, can be guaranteed safety institutionally before arriving the commitment that heat dashes cruelly.
For the temperature that suppresses battery unit 101 rises, prevent that deformed plate 2 and group unit pressing plate 3,3 from preferably using the heat release assembly of the good material of heat conductivity, thickness, shape.When using these heat release assemblies, prevent deformed plate 2, the heat heat release apace of each battery unit 101 of formation group unit 102 between each battery unit 101 by being present in.Therefore, even each battery unit 101 heating when discharging and recharging, the heat release apace of this heat can prevent that each battery unit 101 from becoming high temperature.Because piling up for a plurality of battery units 101, group unit 102 forms, central part thermal capacitance in group unit 102 is easily accumulated, be located between each battery unit 101 by the deformed plate 2 that prevents that exothermicity is good, because the heat heat release apace of battery unit 101,102 central part heat can not accumulated in the group unit, the temperature of battery unit 101 rise slow down and, can implement the cooling of separator 112 really.
In aforesaid first embodiment, in the battery 1 that possesses group unit 102, group unit 102 is by the separator 112 that inserts insulation usefulness between positive electrode 110 and negative material 111, with the lamination tectosome 113 of these assembly laminations with electrolyte with aluminium laminated board 114 as the outer dress of lamination, the battery unit 101 as cell body of 114 sealings, overlap with a plurality of battery units 101 then and form as the Battery pack body, between the battery unit 101 of group unit 102, insert as hard prevent deformable material prevent deformed plate 2 simultaneously, be provided with pushing group unit 102 all and prevent these battery units 101 distortion as the group unit pressing plate 3 that prevents anamorphic attachment for cinemascope, 3.
So; even the protection of electric property was lost efficacy; by the expansion that prevents that deformed plate 2 and group unit pressing plate 3,3 can institutional inhibition battery units 101; when overcharging etc.; even because the decomposition of electrolyte produces gas in battery unit 101, the lamination structure in each battery unit 101 can not crumble yet.If do not produce distortion at the lamination structure, by the impedance operator of separator 112, before the temperature of separator 112 arrived solution temperature, the electric current of battery unit 101 reduced, and was suppressed because the temperature of battery unit 101 rises, and can not cause heat to be dashed cruelly.By more than, can provide a kind of battery, the distortion of the battery unit 101 that caused of preventing to overcharge, and carry out institutional Security Countermeasures.
In this first embodiment, prevent that deformed plate 2 and/or group unit pressing plate 3,3 from being to use the good heat release member of heat conductivity again.
So, by being present in preventing deformed plate 2 and/or organizing unit pressing plate 3,3 between each battery unit 101, the heat of each battery unit 101 of formation group unit 102 is able to heat release apace.Therefore, when discharging and recharging, even each battery unit 101 heating, loud, high-pitched sound heat also can promptly be released, and can prevent that each battery unit 101 from becoming high temperature.
The 2nd figure is the major part cutaway view of the structure of the battery among this second embodiment.The essential structure of battery 10 is identical generally with the battery 1 shown in first embodiment.That is, the object of will a plurality of flat tabular battery unit 101 electric property ground in order to reach set voltage, capacity connecting in group unit 102 overlaps up and down and in the cell stack that forms, sandwiches between each battery unit 101 of lamination and prevent deformed plate 2.
In this second embodiment, use the case shape housing replacement group unit pressing plate 3,3 and as preventing anamorphic attachment for cinemascope.Housing 11 is to prevent that the group unit 102 of deformed plate 2 is low a little and form than clamping, and when group unit 102 was accommodated in its inside, group unit 102 was pressed in the housing 11 and is shaped.By this, group unit 102 is pushed into the inner face of housing 11, owing to apply the pressure of certain degree, the expansion of each battery unit 101 is suppressed.
The variation of present embodiment is the battery 20,30 shown in the 3rd figure and the 4th figure again.In the battery 20, prevent that deformed plate 2 from not inserting the interlayer of each battery unit 101, but the battery unit 101 of each sheet or per two battery unit 101 insertions prevent that the group unit 102 of deformed plate 2 is pressed in the housing 21 of case shape.In the battery 20 of the 3rd figure, preventing to clip battery unit 101 between the deformed plate 2,2, at housing 21 inner faces and prevent clamping a slice battery unit 101 between the deformed plate 2.On the other hand, in the battery 30 of the 4th figure, per two battery units 101 insert and prevent that the group unit 102 of deformed plate 2 is pressed in the housing 31.Therefore, housing 21,31 must be designed to its size and can be pressed into its inside for group unit 102.
The battery unit 101 that the top of group unit 102 or group unit 102, bottom constitute relaxes owing to temperature rises, can positively implement the cooling of separator, the housing 11,21,31 that the preventing of group unit 102 itself is out of shape is good material, thickness, the shape of heat conductivity preferably also.Insertion group unit 102 prevent deformed plate 2, variation shown in the 3rd, 4 figure, even do not insert between each battery unit 101, the size of the unit number that consideration group unit 102 overlaps and the thickness of battery unit 101, size (capacity), encapsulation, can be per two and per three insert optional positions, under the alleviation effects that the temperature of battery unit 101 rises is preferential situation, preferably shown in the 2nd figure, insert between each battery unit 101.
As mentioned above, in the battery 10,20,30 of this second embodiment, the above-mentioned anamorphic attachment for cinemascope that prevents is will organize unit 102 all to be pressed into inner housing 11,21,31.
So, utilize the housing 11,21,31 of taking in group unit 102, can easily prevent the expansion of battery unit 101.Therefore, can utilize existing structure and the Security Countermeasures of enforcement body's property.
In this second embodiment, prevent that deformed plate 2 and/or housing 11,21,31 from being to use the good heat release member of heat conductivity again.
So, prevent plate 2 and/or housing 11,21,31 by the distortion that is present between each battery unit 101, the heat of each battery unit 101 of formation group unit 102 discharges apace.Therefore, even each battery unit 101 heating when discharging and recharging, this heat can be released post, can prevent that each battery unit 101 from becoming high temperature.
In the various embodiments described above, do explanation following at the relevant favourable variation of 101 monomers of the battery unit in the various embodiments described above.Owing to ensconce the battery unit 101 in the battery 1,10,20,30 in this variation is applicable to, more improving safety.
The 5th figure is the plane graph of part excision of an end parts of the secondary cell of expression first variation, and as the battery unit 41 of secondary cell, except externally mounted part divided, the battery unit 101 represented with known example and each embodiment was identical.That is, battery unit 41 is inner to form positive electrodes 110 with negative material 111 and separator 112 lamination several layers and form after the lamination tectosome 113, with electrolyte with structure as aluminium laminated board 42,42 sealings of outer dress member.And with the part shown in the figure, in battery unit 41, anode electrode 110a and negative electrode 111a be the end of outstanding side not.
The edge of aluminium laminated board 42,42 for the electrolyte of inside does not expose, becomes and crosses over full girth and and the hot melt that forms the applying of no gap portion 43 by hot melt.On the other hand, the inboard that hot melt portion 43 forms the bag shape portion 44 that by hot melt, and this bag shape portion 44 is taken in, is sealed in lamination tectosome 11 and electrolyte system.It is that edge from aluminium laminated board 42,42 forms with set width that hot melt portion 43, only anode electrode 110a and negative electrode 111a the central portion of the end of outstanding side form its width narrow weld portion 43a as electrolyte releasing device narrower than other parts.Narrow weld portion 43a is a thermal welding aluminium laminated board 42 and forming, and makes the triangle bag shape 44a of portion that is communicated with bag shape portion 44 exceed with bag boundary line of shape portion 44 and be triangular shape from thermal welding portion 43.That is, narrow weld portion 43a system diminishes the width of thermal welding portion 43 partly and makes bag shape portion 44 protrude in the edge side of aluminium laminated board 42.
Then, at the overvoltage of battery 41, be used as explanation when overcharging.
When never illustrated charger applied overvoltage to battery unit 41, the electrolyte decomposition of battery unit 41 inside was quickened, and heat produces and the temperature of battery unit 41 begins to rise.Simultaneously, in battery unit 41 inside,, cause the expansion of aluminium laminated board 42 owing to the decomposition of electrolyte produces decomposition gas.At this moment, when the pressure in the battery unit 41 rose to set value, the sealing of narrow weld portion 43a was broken and is opened, and therefore, the decomposition gas and the electrolyte itself of the above-mentioned electrolyte in the lithium unit 41 spill to the outside.Battery unit 41 temperature inside rise and are produced by the energy that is accumulated in battery unit 41, so decomposition gas that produces by the decomposition of the electrolyte that overvoltage caused, stage makes narrow weld portion 43a in early days, the sealing that is the aluminium laminated board 42,42 of dress outside the unit is open, electrolyte is emitted with the state of aqueous and gasifying gas, because the electrolyte in battery unit 41 inside reduces, battery unit 41 becomes the impedance body of tool impedance, and the inner temperature that spontaneous heating caused rises and is suppressed.
So, in battery unit 41, make the painstakingly open function of aluminium laminated board 42,42 by being arranged on superpotential commitment, and carry out institutional Security Countermeasures.The purpose of this opening is for producing decomposition gas towards the commitment (higher than quota voltage at least voltage level) of temperature owing to the decomposition of electrolyte cruelly arriving heat, with this decomposition gas inner electrolyte is discharged towards the outside, rising to heat makes battery ineffective till temperature cruelly, guarantee purpose of safety and reach, different widely with the purpose of known general explosion-proof valve.Promptly, known explosion-proof valve is the electrolyte evaporation by battery unit 101 temperature inside rise, the pressure of the imflammable gas that produces by the boil-off gas that produces and owing to the dissolving of separator 112 etc. is opened, with respect to this, narrow weld portion 43a is in temperature (the about 120 °) temperature before of electrolyte evaporation, the pressure of the decomposition gas that produces by the decomposition of electrolyte and opening is discharged electrolyte outside and effect as safety valve is arranged.
In aforesaid present embodiment, insert the separator 112 of insulation usefulness between positive electrode 110 and the negative material 111, make lamination tectosome 113 after these assembly laminations with electrolyte with in the battery unit 41 as aluminium laminated board 42,42 sealings of the outer dress of lamination as secondary cell, be provided with narrow weld portion 43a as the electrolyte discharge device, when charging,, make 42,42 openings of aluminium laminated board and above-mentioned electrolyte is discarded to the outside in the interior pressure that decomposition gas caused of the set above-mentioned decomposed solution that overvoltage value produced.
So, in set overvoltage, the interior pressure that utilization is caused by the decomposition gas that electrolyte decomposition produced, stage makes the sealing of aluminium laminated board 42,42 open in early days, make electrolyte be discarded to battery unit 41 outsides, inner at battery unit 41 by this because electrolyte reduces, and battery unit 41 becomes the impedance body with impedance, can be suppressed at the inner temperature that is caused by heating own and rise.Therefore, provide battery 41, the effect of battery is stopped, can guaranteeing safety at superpotential commitment.
The 6th figure is the plane graph that the part of end part of the secondary cell in expression second variation removes.Except narrow weld portion 43b, other uses the assembly identical with the battery unit 41 shown in the 5th figure as the battery unit 51 of secondary cell.
For the action effect of narrow weld portion 43b, except the open pressure and opening amount (leakage of electrolyte and gasifying gas) difference of narrow weld portion 43b, the narrow weld portion 43a illustrated with first variation is identical generally.
The 7th figure is the plane graph that the part of end part of the secondary cell in expression the 3rd variation removes.Except narrow weld portion 43c, other uses the assembly identical with the battery unit 41 shown in the 5th figure as the battery unit 61 of secondary cell.
For the action effect of narrow weld portion 43c, except the open pressure and opening amount (leakage of electrolyte and gasifying gas) difference of narrow weld portion 43b, the narrow weld portion 43a illustrated with first variation is identical generally.
The 8th figure is the plane graph that the part of end part of the secondary cell in expression the 3rd variation removes.Except narrow weld portion 43d, other uses the assembly identical with the battery unit 41 shown in the 1st figure as the battery unit 71 of secondary cell.
For the action effect of narrow weld portion 43b, except the open pressure and opening amount (leakage of electrolyte and gasifying gas) difference of narrow weld portion 43b, the narrow weld portion 43a illustrated with first variation is identical generally.
And the present invention is not limited to the various embodiments described above, can do change in the scope of the purport that does not break away from the present invention.Structure in the various embodiments described above is done combination, displacement also can.Battery of the present invention is not limited to lithium battery, applicable to the various battery with same property, problem.Again, prevent that the size, shape, insertion position etc. of deformed plate 2 from there is no special qualification, exothermicity capable of being combined prevent deformed plate 2 (heat liberation board) and thermal insulation prevent deformed plate 2 (thermal insulation board).Particularly, use heat insulating component with thermal insulation if prevent deformed plate 2, then can be separately or with the unit to be that unit is done cell body heat insulation, prevent the temperature ascending wave of cell body and other.Again, for example with two a plurality of battery units 101 of heat liberation board clamping as a unit (component unit), when piling up a plurality of these unit, this heat liberation board inserts thermal insulation board each other and constitutes and also can.
But the secondary cell of above-mentioned each variation usefulness is not limited to lithium battery, and the inner sealing electrolyte of dress all can so long as be higher than the gas that magnitude of voltage produced of the magnitude of voltage of overvoltage protection at least outside lamination.Again, among the narrow weld portion 43b, form different shape and make up, can do diversified variation by the non-weld of thermal welding portion 43 and notch part.The electrolyte discharge device is provided with shallow wound in the bag shape portion 44 of aluminium laminated board 42,42 except narrow weld portion 43b, pin is set near battery unit, utilizes the power when expanding to form holes at aluminium laminated board 42,42.
Claims (according to the modification of the 19th of treaty)
1. (revise afterwards) a kind of battery, comprise a Battery pack body, form with a plurality of cell bodies overlappings, battery system inserts the separator of insulation usefulness between positive electrode and negative material, the lamination tectosome that makes these laminations is adorned sealing with electrolyte outward with lamination and is formed, wherein between the above-mentioned cell body of above-mentioned Battery pack body, insert the deformable members that prevents of hard, be provided with simultaneously the above-mentioned Battery pack body of pushing all and prevent each cell body distortion prevent anamorphic attachment for cinemascope, the above-mentioned good heat release member of heat conductivity that prevents that deformation element system from using the heat with above-mentioned Battery pack body inside to discharge to the outside.
2. (revise afterwards) a kind of battery, comprise a Battery pack body, form with a plurality of cell bodies overlappings, battery system inserts the separator of insulation usefulness between positive electrode and negative material, the lamination tectosome that makes these laminations is adorned sealing with electrolyte outward with lamination and is formed, wherein between the above-mentioned cell body of above-mentioned Battery pack body, insert the deformable members that prevents of hard, be provided with simultaneously the above-mentioned Battery pack body of pushing all and prevent each cell body distortion prevent anamorphic attachment for cinemascope, the above-mentioned deformation element system that prevents uses and has the heat insulating component that makes hot independently thermal insulation between above-mentioned each cell body.
3. (revise afterwards) battery as claimed in claim 1 or 2, the wherein above-mentioned anamorphic attachment for cinemascope that prevents is that above-mentioned Battery pack all is pressed into inner housing.
4. (revise afterwards) battery as claimed in claim 3, the good heat release member of above-mentioned housing system's use heat conductivity.
5. (deletion)
6. (revise back) is as each described battery in the claim 1～4, wherein be provided with the electrolyte discharge device at above-mentioned cell body, the interior pressure that decomposition gas was caused with the set above-mentioned electrolyte that overvoltage was produced when charging makes the sealing of adorning outside the above-mentioned lamination by opening, makes above-mentioned electrolyte be discarded to the outside.
7. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, makes above-mentioned bag shape portion protrude in above-mentioned edge side and forms.
8. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, makes above-mentioned bag shape portion protrude in above-mentioned edge side and forms.
9. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, and above-mentioned electrolyte discharge device makes the applying part of the outer dress of this lamination be cut into the U font from above-mentioned edge and forms.
10. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, and above-mentioned electrolyte discharge device makes the applying part of the outer dress of this lamination be cut into the V font from above-mentioned edge and forms.
11. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, make above-mentioned bag of shape portion protrude in above-mentioned edge side, make the applying of dress outward of this lamination partly be cut into the U font and form simultaneously from above-mentioned edge.
12. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, make above-mentioned bag of shape portion protrude in above-mentioned edge side, make the applying of dress outward of this lamination partly be cut into the V font and form simultaneously from above-mentioned edge.
Claims (12)
1. battery, comprise a Battery pack body, form with a plurality of cell bodies overlappings, battery system inserts the separator of insulation usefulness between positive electrode and negative material, the lamination tectosome that makes these laminations is adorned sealing with electrolyte outward with lamination and is formed, wherein between the above-mentioned cell body of above-mentioned Battery pack body, insert the deformable members that prevents of hard, be provided with simultaneously the above-mentioned Battery pack body of pushing all and prevent each cell body distortion prevent anamorphic attachment for cinemascope.
2. battery as claimed in claim 1, the wherein above-mentioned anamorphic attachment for cinemascope that prevents is that above-mentioned Battery pack all is pressed into inner housing.
3. battery as claimed in claim 1, wherein above-mentioned deformation element and/or the above-mentioned anamorphic attachment for cinemascope system that prevents of preventing uses the good heat release member of heat conductivity.
4. as claim 1 a described battery, the wherein above-mentioned deformation element system that prevents uses the heat insulating component with thermal insulation.
5. battery as claimed in claim 2, wherein above-mentioned deformation element and/or the above-mentioned housing system of preventing uses the good heat release member of heat conductivity.
6. as each described battery in the claim 1～5, wherein be provided with the electrolyte discharge device at above-mentioned cell body, the interior pressure that decomposition gas was caused with the set above-mentioned electrolyte that overvoltage was produced when charging makes the sealing of adorning outside the above-mentioned lamination by opening, makes above-mentioned electrolyte be discarded to the outside.
7. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, and above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally and forms.
8. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, makes above-mentioned bag shape portion protrude in above-mentioned edge side and forms.
9. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, and above-mentioned electrolyte discharge device makes the applying part of the outer dress of this lamination be cut into the U font from above-mentioned edge and forms.
10. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, and above-mentioned electrolyte discharge device makes the applying part of the outer dress of this lamination be cut into the V font from above-mentioned edge and forms.
11. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, make above-mentioned bag of shape portion protrude in above-mentioned edge side, make the applying of dress outward of this lamination partly be cut into the U font and form simultaneously from above-mentioned edge.
12. battery as claimed in claim 6, wherein above-mentioned battery system makes the edge of the outer dress of above-mentioned lamination fit with set width and forms pocket, above-mentioned electrolyte is to be sealed in this pocket, above-mentioned electrolyte discharge device narrows down the applying width partly of the outer dress of this lamination locally, make above-mentioned bag of shape portion protrude in above-mentioned edge side, make the applying of dress outward of this lamination partly be cut into the V font and form simultaneously from above-mentioned edge.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP290342/2005 | 2005-10-03 | ||
| JP290339/2005 | 2005-10-03 | ||
| JP2005290342 | 2005-10-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101467282A true CN101467282A (en) | 2009-06-24 |
Family
ID=40806683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006800296663A Pending CN101467282A (en) | 2005-10-03 | 2006-10-03 | Battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101467282A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347625A (en) * | 2010-08-01 | 2012-02-08 | 王卫平 | Method and equipment for forming and testing series-connected and monitored batteries |
| CN104396046A (en) * | 2012-06-25 | 2015-03-04 | Nec能源元器件株式会社 | Cell pack |
| CN105870518A (en) * | 2014-10-28 | 2016-08-17 | 现代摩比斯株式会社 | Battery module and overcharge preventing device for battery module |
| CN109564994A (en) * | 2016-08-09 | 2019-04-02 | 小鹰公司 | With the battery for compressing and preventing thermal runaway sprawling feature |
| CN111384332A (en) * | 2018-12-29 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
| US11552346B2 (en) | 2018-06-22 | 2023-01-10 | Wisk Aero Llc | Capacitance reducing battery submodule with thermal runaway propagation prevention and containment features |
-
2006
- 2006-10-03 CN CNA2006800296663A patent/CN101467282A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347625A (en) * | 2010-08-01 | 2012-02-08 | 王卫平 | Method and equipment for forming and testing series-connected and monitored batteries |
| CN102347625B (en) * | 2010-08-01 | 2016-08-03 | 王卫平 | Series connection monitoring Battery formation method of testing and equipment thereof |
| CN104396046A (en) * | 2012-06-25 | 2015-03-04 | Nec能源元器件株式会社 | Cell pack |
| CN104396046B (en) * | 2012-06-25 | 2017-06-30 | Nec能源元器件株式会社 | Battery pack |
| US9741979B2 (en) | 2012-06-25 | 2017-08-22 | Nec Energy Devices, Ltd. | Battery pack |
| CN105870518A (en) * | 2014-10-28 | 2016-08-17 | 现代摩比斯株式会社 | Battery module and overcharge preventing device for battery module |
| CN105870518B (en) * | 2014-10-28 | 2018-11-13 | 现代摩比斯株式会社 | Battery module and battery module prevent device with overcharge |
| CN109564994A (en) * | 2016-08-09 | 2019-04-02 | 小鹰公司 | With the battery for compressing and preventing thermal runaway sprawling feature |
| US11552346B2 (en) | 2018-06-22 | 2023-01-10 | Wisk Aero Llc | Capacitance reducing battery submodule with thermal runaway propagation prevention and containment features |
| CN111384332A (en) * | 2018-12-29 | 2020-07-07 | 宁德时代新能源科技股份有限公司 | Battery module and battery pack |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1970982A1 (en) | Battery pack | |
| JP5329527B2 (en) | Battery cell with improved safety | |
| EP2602840B1 (en) | Secondary battery pouch having improved stability, pouch-type secondary battery using same, and medium- or large-sized battery pack | |
| US8277970B2 (en) | Pouch-type secondary battery having an non-sealing residue portion | |
| EP2802025B1 (en) | Battery cell having stair-like structure | |
| EP2779269B1 (en) | Battery cell having a novel structure | |
| US11046206B2 (en) | Battery module with short-circuit unit, and battery pack and vehicle including the same | |
| JP2009245879A (en) | Laminate type battery and battery module equipped therewith | |
| KR102292159B1 (en) | Pouch Type Lithium Secondary Battery comprising Electrode Lead using Electric-Conductive Polymer | |
| US11688907B2 (en) | End cap assembly, battery cell and manufacturing method thereof, battery, and electric apparatus | |
| KR101123061B1 (en) | Secondary Battery of Improved Safety | |
| EP3879620A1 (en) | Battery module and battery pack including the same | |
| CN101467282A (en) | Battery pack | |
| US10700321B2 (en) | Electrode lead and secondary battery having same | |
| KR20180091324A (en) | Battery cell and Secondary battery assembly comprising the same | |
| JP2010087170A (en) | Electric storage device | |
| KR101749729B1 (en) | Secondary battery | |
| WO2014141753A1 (en) | Power cell module | |
| JP2011249428A (en) | Power storage module with explosion proof function | |
| KR20220139619A (en) | Secondary battery and manufacturing method of the same | |
| KR100420149B1 (en) | Secondray battery applying safety device | |
| KR101637896B1 (en) | Electrode Assembly with Liquid Materials Receiver for Insulation | |
| EP4216360A1 (en) | Electrode tab, electrode assembly and secondary battery comprising same | |
| EP4250452A1 (en) | Battery pack and device including same | |
| US20230123414A1 (en) | Battery cell, battery, electric device, and method and device for manufacturing battery 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 | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1132092 Country of ref document: HK |
|
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090624 |
|
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: WD Ref document number: 1132092 Country of ref document: HK |