CN1554132A - Lithium ion secondary battery - Google Patents
Lithium ion secondary battery Download PDFInfo
- Publication number
- CN1554132A CN1554132A CNA028177444A CN02817744A CN1554132A CN 1554132 A CN1554132 A CN 1554132A CN A028177444 A CNA028177444 A CN A028177444A CN 02817744 A CN02817744 A CN 02817744A CN 1554132 A CN1554132 A CN 1554132A
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- district
- sidewall
- jar
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- flange
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/103—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure prismatic or rectangular
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- 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
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- 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
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- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
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- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
- H01M50/169—Lids or covers characterised by the methods of assembling casings with lids by welding, brazing or soldering
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/04—Cells with aqueous electrolyte
- H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
- H01M6/08—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with cup-shaped electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2200/00—Safety devices for primary or secondary batteries
- H01M2200/10—Temperature sensitive devices
- H01M2200/106—PTC
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
Disclosed is a thin and wide lithium ion secondary battery capable of preventing leakage of an electrolyte and enhancing an energy storage density by securing the sealing between a cap and a can. The battery is characterized in that a flange is applied to the can, and an upper portion of the can including the flange is inserted into the cap, assembled, and welded. A welding area necessary for welding the can and the cap is secured to thereby prevent leakage of an electrolyte. A metal container having a wide opening and a thickness of 0.3mm or less can be used as the battery can, which remarkably increases the energy storage density. The can and the cap are assembled by an insertion method, there is no need to use a separate jig during welding of the can and the cap, which enhances productivity and thus decrease production costs.
Description
Technical field
The present invention relates to a kind of thin and wide lithium rechargeable battery, more particularly relate to a kind of so thin and wide lithium rechargeable battery, it is by guaranteeing to cover and having the closed state between the wide area jar of wide opening and the battery that can prevent solution leakage, improve energy storage density and prepare different shape.
Background technology
In order to satisfy the needs of portable type electronic product Market Growth and variation, demand for the rechargeable battery of supplying as portable energy also increases fast, and described portable type electronic product for example is mobile phone, field camera and notebook computer.Along with these portable type electronic products become more and more littler and more and more lighter, more performance and multiple function can be provided again simultaneously, make the requirement that improves the secondary cell energy storage density is also become more and more urgent.
In order to satisfy such demand, the research of process several years has produced popular lithium rechargeable battery at present, and it makes lithium ion reversibly to insert from the agent structure of material and to take out.With existing aqueous solution type secondary cell, for example nickel-cadmium cell is compared with Ni-MH battery, lithium rechargeable battery per unit volume and per unit weight have higher energy density, and have improved and discharge and recharge the life-span, and the very fast existing battery that is used for portable type electronic product that substituted.
Meanwhile, portable terminal and the present trend of personal mobile information terminal are: the size of its display has increased communication function owing to the raising of technology and display message amount increases, and the consumption of energy also increases fast thus.Therefore, using under the conventional situation of thickness, be difficult to obtain enough running times less than the thin lithium rechargeable battery of 6mm.So, need to connect two or more batteries or use very thick battery.From in appearance, these lithium rechargeable batteries are made of a jar and a lid, put into electrolyte in wherein jar, and described lid constitutes the container of sealing with jar.Then,, thereby improved interior pressure,, electrolyte has often taken place reveal therefore in the contact portion of jar and lid because abiogenous electrode expands and the gas generation during using secondary cell along with the bulk of lithium rechargeable battery and the growth of capacity.The leakage of electrolyte causes fatal influence to the performance of battery, is using under the situation of battery even, can the circuit of the electronic installation that uses this battery be polluted, thereby has shortened life-span of expensive electronic devices.
Fig. 1 a and 1b are the schematic diagrames that is used to illustrate conventional lithium rechargeable battery.
As previously mentioned, reveal the problem that is caused for fear of electrolyte, conventional rectangle lithium ion battery has focused on the sealing surface of jar and lid is minimized, and adopts the narrow and dark canister of opening.Then, if compare with the aperture area of container, the surface area of dark type inside has increased, and then metallic plate should be drawn into the same size with the degree of depth, thereby can cause the crack of container corner or the distortion of chamber wall, this manufacturing for wide slim battery is disadvantageous.In addition, because this container depth depression has just had making the restriction of different shape container.
Recently, a kind of wall thickness occurred and be the lithium ion rectangular battery about 0.2mm, but it is only limited to having the aluminium of very high draw ratio as surface mass.Metal with high draw ratio is easy to carry out the degree of depth and stretches, but the interior pressure of battery makes its distortion again easily, in the laser welding that is used for sealing, because the high-termal conductivity of this metal makes it have very high welding mortality.Because technology difficulty strengthens, improved the processing cost of metal surface material so the degree of depth stretches, and selected aspect metal material and the change thickness very big restriction is arranged.
Meanwhile, prepare lithium rechargeable battery by a kind of like this method, this method comprises firmly will covering to be inserted in the jar, and by the step of laser beam with its welding, to guarantee bonding area and to improve the productivity ratio of large-scale production.
With reference to Fig. 1 a, in the lithium rechargeable battery that uses the routine of exerting oneself the insertion method and preparing,,, will make the thickness increase of battery cover 21 like this so that firmly battery cover 21 is inserted in this jar with two step structures preparation jar.And under to jar 11 and lid 21 situations of welding and sealing, the opening that weld is not only wide but also thin, and the thickness increase of battery cover 21 is the keys that guarantee airtight quality.For above-mentioned reasons, if increased the thickness of battery cover 21, then the loss of the energy density of unit volume battery will become very big.Therefore, in order to prepare wide slim battery, adopting firmly, the insertion method is inappropriate.As shown in Fig. 1 a (4), under jar 11 and lid 21 situations about assembling, protective circuit box 30 and PTC box 40 are installed are made the energy density loss of unit volume become very big.Therefore, a kind of like this trial has just been arranged, be about to electrode body and insert in the wide and dark metal can of opening, placed the plate shape crown cap of single stage structure, and should jar and lid welding and sealing.
With reference to Fig. 1 b, battery cover 22 does not adopt firmly insertion method and the shaping of two steps, but has adopted single stage and wide plate shape, at this moment, just must increase the thickness of battery can 12 and battery cover 22 to guarantee to be used to weld necessary enough bonding areas.Simultaneously, because the maximum weld length of the canister that is allowed is identical with the thickness of this canister, then the thickness of canister just is difficult to guarantee suitable sealing less than 0.3mm, the shortcoming that has just had the product recovery rate to reduce.
In addition, do not adopt firmly insertion method and the shaping of two steps at battery cover 22, but adopt under the situation of single stage and wide plate shape, accurately the binding site of self-contained battery jar 12 and battery cover 22.This just needs highly precisely departure, thereby has improved production cost, also need use expensive automatic fixture in welding procedure, owing to spent process time in the fixed position, has reduced speed of production, has improved production cost thus.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of lithium rechargeable battery, adopt flange on its battery can, make the thin of the jar of preparation and the thickness ratio routine of covering to strengthen energy storage density, pass through to regulate the validity of the outstanding length of flange simultaneously, and boost productivity thus with the enhancing sealing.
Another object of the present invention provides a kind of lithium rechargeable battery, and making can be by installing protective circuit box and PTC box so that the space outerpace of battery can is utilized in the formed space outerpace of the shape of its battery can.
With other characteristic, provide a kind of lithium rechargeable battery to achieve these goals.This lithium rechargeable battery comprises: a jar, it comprises one first district and one second district, each district all has a separate space, this space comprises a bottom, upper shed portion and the sidewall that is connected bottom and upper shed portion, and the separate space in first district and second district communicates with each other, described first district comprises the bottom of a sealing, so that inwardly insert battery lead plate and introduce electrolyte, described second district comprises a predetermined zone, it seals, and it is outwards outstanding by the sidewall in first district, and remaining presumptive area comprises that peristome is so that the spatial communication that the space that first district forms and second district form, described jar also comprises a flange, and it is outwards given prominence to and formed by second district's top edge, and wherein the cross-sectional area in second district is greater than the cross-sectional area in first district; A lid, it comprise the top of a sealing and form can closure flange around sidewall, this lid is with above-mentioned canned fitting over, and forming an independent closed container, thereby makes the medial surface of the sidewall that covers to the outside of described flange; With an electrode tip, the one end is connected with battery lead plate, and the other end is exposed to the outside of jar.
Here, the bottom in second district has a predetermined zone, and this predetermined zone is by the length of the outstanding 2-10mm of sidewall in first district, and described flange is by the length of the outstanding 0.2-2mm of sidewall in second district.If jar and the location of lid be to make the medial surface of sidewall to the outside of flange, then lid around formation be to make that the gap between the outside of the inboard of the sidewall of lid and flange is 1mm or littler.The altitude range of the sidewall in second district is 0.5mm to 3mm, and the altitude range of the sidewall of lid is 0.5mm to 5mm.
In addition, preferably, the bottom of the sealing in second district that the described other end of electrode tip passes jar is to be exposed to the outside of jar.And described battery also comprises a protective circuit box, wherein has the circuit that is electrically connected with electrode tip, and described circuit box is installed in the space that the outside by the outside of a sidewall in first district and second district forms.In addition, described battery also comprises a PTC box, wherein has the PTC device that is electrically connected with electrode tip, thereby the outside of the bottom in second district of the outside of the sidewall in first district that described PTC box is installed in jar or jar makes the PTC box be positioned in the space that the outside by the bottom in the outside of the sidewall in first district and second district forms, thereby or the sidewall that is installed in first district make this PTC box be positioned flange below.
In addition, the flange of jar and the sidewall of lid or upside welding are to form the container of sealing.
Description of drawings
What Fig. 1 a and 1b showed is the perspective view of the lithium rechargeable battery of routine; With
What Fig. 2 to Fig. 5 showed is the perspective view of lithium rechargeable battery of the present invention.
Embodiment
Following with reference to accompanying drawing, the preferred embodiments of the invention are described in detail.In the accompanying drawings, the same element with said function is given same Reference numeral, and the description of its repetition is had a mind to omit.
What Fig. 2 showed is the perspective view of jar of the present invention.In Fig. 2, mark " A " shows is the cutaway view of a-a ' line intercepting in Fig. 2.What Fig. 3 showed is the perspective view of lid of the present invention.In Fig. 3, mark " B " shows is the cutaway view of b-b ' line intercepting in Fig. 3.Fig. 4 shows is the perspective view of the container that assembles, and wherein the jar of Fig. 2 is assembled together with lid among Fig. 3.In Fig. 4, mark " C " shows is the cutaway view of c-c ' line intercepting in Fig. 4.What Fig. 5 showed is that protective circuit box and PTC box are installed in the structure perspective view in the assembly that is made of jar shown in Fig. 4 and lid.In Fig. 5, mark " D " shows is the cutaway view of d-d ' line intercepting in Fig. 5, is the cutaway view of e-e ' line intercepting in Fig. 5 and mark " E " shows.
With reference to Fig. 2, jar 100 is divided into first district 110 and second district 120, and the two all has a separate space, and communicates with each other.The cross-sectional area in second district 120 is greater than the cross-sectional area in first district 110.
Though do not show in the drawings, battery lead plate and electrolyte are positioned in jars 100 first district 110, and an end of electrode tip is connected with battery lead plate, and its other end passes the bottom 122 ' of giving prominence to and sealing in jars 100 second district 120, outside being exposed to.
The flange 124 of jar 100 and lid assembling described below, thus a container that seals formed.
Meanwhile, measure time-out when the sidewall 113 ' from first district, the ideal length in the sealing of the bottom 122 in second district 120 and outstanding zone 122 ' is 2-10mm.This length is to determine by the protection box of considering will be described below or the volume of PTC box and the machinability of installation.Described protection box or PTC box are installed in the space that the outside by the sealing in the outside of a sidewall 113 ' in first district 110 of jar 100 and second district 120 and outstanding bottom 122 ' forms.Yet, if outstanding length has surpassed above-mentioned scope, the problem that can bring tank volume to increase.
By controlling outstanding length, flange 124 can improve the validity of sealing.Preferred flange 124 is outstanding by the sidewall in second district 120, and its outstanding length is 0.2-2mm.This length is to determine in conjunction with the machinability of work by jar of considering hereinafter will describe and lid.
With reference to Fig. 3, lid 200 comprises the top 210 and the sidewall 230 of a sealing, and in order to can form flange 124 encapsulation all around to the jar 100 of Fig. 2, it is configured as the structure of inner underside opening.At this moment, when jar 100 and lid 200 each other assembling make that the modes of assembling are to cover the outside of the medial surface of 200 sidewall 230 to the flange 124 of jar 100, and the upside of jars 100 flange 123 is when contacting with the zone of the inside selection of the upside 210 of lid 200, then preferred form by this way cover 200 sidewall 230 around, even cover between the outside of the inboard of 200 sidewall 230 and flange 124 1mm or littler gap are only arranged.If this gap is too big, although jars 100 and lid 200 be bonded to each other by welding procedure etc., sealing still may be lowered.
In addition, if the height of the sidewall 123 in second district 120 of jar 100 is 0.5mm to 3mm, the preferred heights of the sidewall 230 of lid 200 is 0.5mm to 5mm.This is that then the machinability of jar 100 and lid 200 combinations reduces because under the situation with jar 100 and lid 200 assemblings, sealing requirements lid 200 is first district 110 and second district 120 of closed container 100 at least, but too big as the height of operculum 200.
With reference to Fig. 4, jars 100 and lid assembling so each other, promptly make and cover the outside of the medial surface of 200 sidewall 230 flange 124, and regional contact of selection of the upside of jars 100 flange 123 and the inside of covering 200 upside 210.By adopting laser welding or resistance welded, the sidewall 230 of lid and upside combine with the flange 124 of jar 100, to form the container of sealing.
Therefore, comprise that the upside of the jar of flange is inserted in the lid, and with this flange and lid welding, thereby can guarantee to be used for jar and the necessary bonding area of lid welding, do not need independently anchor clamps and weld.
Meanwhile, as a kind of safety device, this lithium rechargeable battery is used to cut off the PTC device of electric current, or is used to prevent the protective circuit that excessively discharges and recharges.
With reference to Fig. 5, the protective circuit box 410 that is electrically connected with electrode tip is installed in a sidewall 113 by first district of jar 100 " the outside and the space that forms, the outside of the downside 122 ' of the outstanding and sealing in second district in.At this moment, this protective circuit box 410 is installed securely, the downside 122 ' in sidewall 113 ' in first district that its position is contiguous jar 100 or second district of jar 100.
In addition, the PTC box 420 that is electrically connected with electrode tip is installed in another sidewall 113 by first district of jar 100 " the outside and the space that forms of the downside of flange 124 in.At this moment, this PTC box 420 is fixedly mounted in jar 100 sidewalls 113 " the outside.By installation protective circuit box 410 in the space that forms in the outside by the outstanding of a sidewall 113 ' outside in first district of jar 100 and second district and the downside 122 ' that seals; and same PTC box 420 is installed in another sidewall 113 by first district of jar 100 " the outside and the space that forms of the downside of flange 124 in; the volume of the battery flexible package of supplementary protection circuit reduces, and the energy storage density enhancing of the unit volume of while battery flexible package state.
Simultaneously, be provided with an electrolyte injecting hole 600, so that inject the electrolyte into the sealing in second district and outstanding downside 122 '.One end of electrode tip is connected with battery lead plate, the other end 500 pass under jars 100 second district give prominence to and enclosed areas 122 ' with the outer wall of the downside 122 ' that is installed in second district.At this moment, the presumptive area of the bottom in second district that electrode tip 500 passes seals very firmly closely, make electrolyte to reveal, and after electrolyte injected, electrolyte injecting hole 600 is sealed closely.
[embodiment 1]
Used thickness is of the present invention jar and the lid that the metallic plate of 0.15mm is made, and manufacturing thickness is that 4.2mm, minor axis length are 34 mm and long axis length is the rectangle lithium rechargeable battery of 54mm.
At this moment, the outstanding length of the flange of jar is 0.5mm, and the space between the inboard of the sidewall of the outside of the flange of jar and lid is set to 0.1mm, with the enough areas that are provided for welding.The assembling as shown in Figure 4 of this jar and lid, and jar flange and the upside of lid and sidewall by the laser welding combination.In addition, protective circuit box and PTC box are attached to the outside of jar securely with Fig. 4 shape.
At this moment, the unit volume energy storage density of the flexible package state that has of the lithium rechargeable battery of manufacturing is 420Wh/l.
[according to the embodiment of the lithium rechargeable battery of Fig. 1 a]
Use the jar and the lid of shape shown in Fig. 1 a, preparation thickness is that 4.2mm, minor axis length are 34mm and long axis length is the rectangle lithium rechargeable battery of 50mm.At this moment, the plate thickness that is used for jar is 0.3mm, and the plate thickness that is used to cover is 0.8mm.The jar and the lid of preparation assemble in the mode of Fig. 1 a (3), and use laser welding.Then, shown in Fig. 1 a (4), protective circuit box and PTC box are attached to securely the outside of this assembly.
At this moment, the unit volume energy storage density of the flexible package state that has of the lithium rechargeable battery of manufacturing is 286Wh/l.
[according to the embodiment of the lithium rechargeable battery of Fig. 1 b]
Use the jar and the lid of shape shown in Fig. 1 b, preparation thickness is that 4.2mm, minor axis length are 34mm and long axis length is the rectangle lithium rechargeable battery of 50mm.At this moment, use the metallic plate of 0.3mm thickness with one deck structure preparation jar and lid.The jar and the lid of this preparation assemble in the mode of Fig. 1 b (3), and use laser welding.
[Comparative Examples 1]
Embodiment of the present invention 1 is compared with [according to the embodiment of the lithium rechargeable battery of Fig. 1 a], and the unit volume energy storage density of embodiment of the present invention 1 is greater than [according to the embodiment of the lithium rechargeable battery of Fig. 1 a] as can be known.Therefore, have under the situation of lithium rechargeable battery of the present invention of same energy storage density making, can make thinner secondary cell than [according to the embodiment of the lithium rechargeable battery of Fig. 1 a] with [according to the embodiment of the lithium rechargeable battery of Fig. 1 a].Therefore, by the molded degree of depth of container being done, just can easily make the battery of different shape than conventional depth as shallow.
[Comparative Examples 2]
Deposited 5 days with the charged state of 4.2V with the battery of the present invention of previous embodiments 1 with according to the lithium rechargeable battery of Fig. 1 a and 1b preparation.And the core at each battery punches respectively.Under 500 Pascals' air pressure, battery with holes was placed 1 hour.
Under this condition, in the battery of [according to the embodiment of the lithium rechargeable battery of Fig. 1 b], there is a spot of electrolyte to ooze out, its voltage is reduced to 3.97V, and the battery and the battery of the present invention of [according to the embodiment of the lithium rechargeable battery of Fig. 1 a] all do not have electrolyte to ooze out, and voltage remains on 4.12V and 4.13V respectively.
In addition, the battery of [according to the embodiment of the lithium rechargeable battery of Fig. 1 b] needs carry out in 30 minutes altogether welding procedure, compares with a battery of the present invention that only needs carry out welding procedure in 10 minutes, and production efficiency has been lost 3 times or more.And, the battery of [according to the embodiment of the lithium rechargeable battery of Fig. 1 b] needs the independent welding equipment and the anchor clamps of complicated shape, and battery of the present invention only need insert jar the insertion process of the downside of lid, does not need independent anchor clamps, thereby has saved step.
Industrial applicibility
As mentioned above, lithium rechargeable battery of the present invention has wherein adopted flange on the battery can, and the upside of the jar by will comprising flange inserts lid and jar and lid are assembled up, can guarantee jar and the necessary bonding area of lid welding like this, to prevent the leakage of electrolyte.The opening that is used as the canister of battery can is wide and shallow, the thickness of canister can be reduced to below the 0.3mm, thereby obviously improve energy storage density.
In addition,, then do not need independently anchor clamps, thereby can boost productivity, reduce production costs at welded tank and Gai Shi because jar and lid are finished assembling with an insertion process.
Also have, protective circuit box and PTC box can be installed on the space outerpace that forms by this jar structure, thereby obviously improve the energy storage density of the unit volume of battery flexible package.
With reference to embodiment preferred, the present invention is described in detail, those of ordinary skills can make various improvement in view of the above and substitute, and this does not break away from the essence and the scope of claims of the present invention.
Claims (8)
1, a kind of lithium rechargeable battery, it comprises:
A jar, it comprises: one first district and one second district, each district all has a separate space, this space comprises a bottom, upper shed portion and the sidewall that is connected bottom and upper shed portion, and the separate space in first district and second district communicates with each other, described first district comprises the bottom of a sealing so that inwardly insert battery lead plate and introduce electrolyte, described second district comprises a predetermined zone, it seals, and outwards outstanding by the sidewall in first district, and remaining presumptive area comprises that peristome is so that the spatial communication that the space that first district forms and second district form; With a flange, it is outwards given prominence to and is formed by second district's top edge, and wherein the cross-sectional area in second district is greater than the cross-sectional area in first district;
A lid, it comprise the top of a sealing and form can closure flange around sidewall, this lid is with above-mentioned canned fitting over, and forming an independent closed container, thereby makes the medial surface of the sidewall that covers to the outside of described flange; With
An electrode tip, the one end is connected with battery lead plate, and the other end is exposed to the outside of jar.
2, according to the lithium rechargeable battery of claim 1, wherein the bottom in second district has a predetermined zone, and this predetermined zone is by the length of the outstanding 2-10mm of sidewall in first district, and described flange is by the length of the outstanding 0.2-2mm of sidewall in second district.
3, according to the lithium rechargeable battery of claim 1, if wherein jar and the location of lid be to make the medial surface of sidewall to the outside of flange, then Gai sidewall around formation be to make that the gap between the outside of the inboard of the sidewall that covers and flange is 1mm or littler.
4, according to the lithium rechargeable battery of claim 1, wherein the altitude range of the sidewall in second district is 0.5mm to 3mm, and the altitude range of the sidewall of lid is 0.5mm to 5mm.
5, according to the lithium rechargeable battery of claim 1, the bottom of the sealing in second district passed jar of the described other end of electrode tip wherein is to be exposed to the outside of jar.
6, according to the lithium rechargeable battery of claim 1 or 5, also comprise a protective circuit box, wherein have the circuit that is electrically connected with electrode tip, described protective circuit box is installed in the space that the outside by the outside of a sidewall in first district and second district forms.
7, according to the lithium rechargeable battery of claim 1 or 5, also comprise a PTC box, wherein has the PTC device that is electrically connected with electrode tip, thereby the outside of the bottom in second district of the outside of the sidewall in first district that described PTC box is installed in jar or jar makes this PTC box be positioned in the space that the outside by the bottom in the outside of the sidewall in first district and second district forms, thereby or the sidewall that is installed in first district make this PTC box be positioned flange below.
8, according to the lithium rechargeable battery of claim 1, the wherein sidewall of Guan flange and lid or upside welding is to form the container of sealing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0044179A KR100389968B1 (en) | 2001-07-23 | 2001-07-23 | Lithium ion secondary battery |
| KR2001/44179 | 2001-07-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1554132A true CN1554132A (en) | 2004-12-08 |
| CN1249836C CN1249836C (en) | 2006-04-05 |
Family
ID=19712424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028177444A Expired - Fee Related CN1249836C (en) | 2001-07-23 | 2002-03-11 | Lithium ion secondary battery |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2004537144A (en) |
| KR (1) | KR100389968B1 (en) |
| CN (1) | CN1249836C (en) |
| WO (1) | WO2003010848A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120007A1 (en) * | 2016-12-30 | 2018-07-05 | Littelfuse Electronics (Shanghai) Co., Ltd. | Polymeric positive temperature coefficient device for battery cell protection |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100477752B1 (en) * | 2002-12-26 | 2005-03-21 | 삼성에스디아이 주식회사 | Protector and lithium secondary battery having the same |
| US7920045B2 (en) | 2004-03-15 | 2011-04-05 | Tyco Electronics Corporation | Surface mountable PPTC device with integral weld plate |
| KR100878703B1 (en) * | 2005-11-28 | 2009-01-14 | 주식회사 엘지화학 | Small Battery Pack Employing PCM on Side Sealing Part |
| KR100719731B1 (en) * | 2005-12-28 | 2007-05-17 | 삼성에스디아이 주식회사 | Battery pack having alignment mark |
| JP6086442B2 (en) * | 2010-07-16 | 2017-03-01 | エルジー・ケム・リミテッド | Rotating jig for battery cells and method for welding battery cells using the same |
| US9147865B2 (en) | 2012-09-06 | 2015-09-29 | Johnson Controls Technology Llc | System and method for closing a battery fill hole |
| KR102207446B1 (en) | 2020-09-14 | 2021-01-25 | 심성구 | The filltration apparatus of waterworks's branched pipe thet having a double fillter and gasket |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2842697C2 (en) * | 1978-09-30 | 1980-08-28 | Varta Batterie Ag, 3000 Hannover | Galvanic element and process for its manufacture |
| JPS55111060A (en) * | 1979-02-19 | 1980-08-27 | Citizen Watch Co Ltd | Thin battery |
| JPS58142758A (en) * | 1982-02-19 | 1983-08-24 | Kawaguchiko Seimitsu Kk | Flat type battery |
| JPS59123163A (en) * | 1982-12-29 | 1984-07-16 | Matsushita Electric Ind Co Ltd | Sealed battery |
| US4725515A (en) * | 1987-05-07 | 1988-02-16 | Eveready Battery Company | Button cell construction with internally compressed gasket |
| JP3196607B2 (en) * | 1995-10-31 | 2001-08-06 | 松下電器産業株式会社 | Explosion-proof sealing plate for sealed batteries |
| KR970031053A (en) * | 1995-11-08 | 1997-06-26 | 윤종용 | Cap assembly assembly structure and method of alkaline secondary battery |
| JP3619634B2 (en) * | 1997-04-09 | 2005-02-09 | 三洋電機株式会社 | Sealed storage battery with safety valve |
| JP2000251855A (en) * | 1999-02-25 | 2000-09-14 | Mitsubishi Chemicals Corp | Nonaqueous secondary battery |
| JP2001126686A (en) * | 1999-10-26 | 2001-05-11 | Toshiba Battery Co Ltd | Pack structure of flat battery |
-
2001
- 2001-07-23 KR KR10-2001-0044179A patent/KR100389968B1/en not_active IP Right Cessation
-
2002
- 2002-03-11 WO PCT/KR2002/000412 patent/WO2003010848A1/en active Application Filing
- 2002-03-11 JP JP2003516122A patent/JP2004537144A/en active Pending
- 2002-03-11 CN CNB028177444A patent/CN1249836C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120007A1 (en) * | 2016-12-30 | 2018-07-05 | Littelfuse Electronics (Shanghai) Co., Ltd. | Polymeric positive temperature coefficient device for battery cell protection |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100389968B1 (en) | 2003-07-04 |
| KR20020003107A (en) | 2002-01-10 |
| CN1249836C (en) | 2006-04-05 |
| JP2004537144A (en) | 2004-12-09 |
| WO2003010848A1 (en) | 2003-02-06 |
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