CN103311461A - Electric storage device - Google Patents
Electric storage device Download PDFInfo
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- CN103311461A CN103311461A CN2013100625681A CN201310062568A CN103311461A CN 103311461 A CN103311461 A CN 103311461A CN 2013100625681 A CN2013100625681 A CN 2013100625681A CN 201310062568 A CN201310062568 A CN 201310062568A CN 103311461 A CN103311461 A CN 103311461A
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- recess
- generating element
- charge storage
- storage element
- packaging container
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides an electric storage device with a reduced size. A monocell (an example of the electric storage device) (14) comprises an electric power generation element (50) and an outer case (62) for accommodating the electric power generation element (50) and having an inner wall (62A) with a recess (64) in a portion thereof opposite to a convex portion at a lower end of the electric power generation element (50). Therefore, compared with the conventional outer case (62) without the recess (64), even when the outer case (62) is arranged close to the electric power generation element (50), a predetermined clearance (CL) can be provided, thereby reducing the size of the monocell (14). Furthermore, because the recess is formed in the inner wall (62A) of the outer case (62), the surface area of the inner wall (62A) can be increased. With this configuration, efficiency in cooling of the monocell (14) can be improved.
Description
Technical field
The present invention relates to a kind of structure of outer packaging container of charge storage element.
Background technology
All the time, all at batteries such as use secondary cells.Battery is taken in generating element in the packaging container and is formed (for example, citing document 1) outside the metal-mades such as aluminium.In battery, for the variation that suppresses to discharge and recharge the heating that causes and ambient temperature expands generating element and interferes with outer packaging container, the problems such as paradoxical discharge or abnormal heating appear, between packaging container and the generating element gap is set outside.
Patent documentation 1:(Japan) JP 2002-117814 communique
In recent years, in comprising the charge storage element of battery, in same volume, take in more generating element and make that the volume miniaturization of generating element of corresponding identical generate output is this to make the requirement of charge storage element miniaturization more tend to become strong strong.Therefore, carry out following design, that is, the reduced width in the gap between generating element and the outer packaging container has been contacted the required minimal specified gap of this degree to making generating element in the situation that expand with outer packaging container.But, make the requirement of charge storage element miniaturization strong, need to make the further miniaturization of charge storage element.
Summary of the invention
The object of the present invention is to provide a kind of technology that makes the charge storage element miniaturization.
Charge storage element of the present invention comprises: the generating element with first protuberance; Take in the outer packaging container of described generating element; The inwall relative with described the first protuberance at described outer packaging container is formed with recess.
Compare with the zone that does not form recess, broad gap can be guaranteed in the zone that is formed with recess.Therefore, even the more close generating element configuration in the zone that does not form recess is compared in the zone that is formed with recess of outer packaging container, also can guarantee the gap of stipulating.According to this charge storage element, form recess on the inwall by packaging container outside, compare with the situation that does not form recess, can near the first protuberance of outer packaging container configuration generating element, can make the charge storage element miniaturization.In addition, form recess on the inwall by packaging container outside, can dwindle the first protuberance of generating element and the distance between the outside batteries, and can enlarge the surface area of the inwall relative with generating element of outer packaging container, can improve the cooling effectiveness of charge storage element.
In above-mentioned charge storage element, also can be constructed as follows: described recess forms in the scope of close described first protuberance of the inwall of described outer packaging container.According to this charge storage element, can make the generating element with first protuberance effectively near the outer packaging container configuration that is formed with recess, can make the charge storage element miniaturization.
In above-mentioned charge storage element, also can be constructed as follows: described recess has the shape corresponding with described the first protuberance.According to this charge storage element, can make the generating element with first protuberance effectively near the outer packaging container configuration that is formed with recess, can make the charge storage element miniaturization.
In above-mentioned charge storage element, also can be constructed as follows: described generating element forms barrel shape, the width that this barrel shape has a first direction is narrower than the platypelloid type section with the width of the second direction of described first direction quadrature, and described recess is formed at described generating element on described inwall relative on the described second direction.According to this charge storage element, on the second direction of generating element, can near the outer packaging container of generating element configuration, can make the charge storage element miniaturization.
In above-mentioned charge storage element, also can be constructed as follows: described recess only is formed at described generating element on described inwall relative on the described second direction.According to this charge storage element, outside packaging container on inwall relative on the first direction, do not form recess with generating element, this inwall forms the plane.In charge storage element, if the inwall of relative outer packaging container is the plane on first direction, then compare with the situation that is formed with recess at this inwall, when generating element expands, can suppress positive plate that generating element has and negative plate on first direction away from.Thus, positive plate and negative plate can be suppressed away from the increase of the internal resistance of the generating element that causes, the stable output characteristic of charge storage element can be guaranteed.
In above-mentioned charge storage element, also can be constructed as follows: on the section perpendicular to axial direction of described generating element, end and the described recess of described generating element on described second direction forms circular-arcly, and the center of curvature of described end is identical on described first direction with the center of curvature of described recess; The radius of curvature of described recess is more than the radius of curvature of described end.According to this charge storage element, the recess center that forms the most deeply that can be in recess near the outer packaging container of generating element configuration, can make the charge storage element miniaturization.In addition, be set as equally by the radius of curvature with recess and end, can make whole of end and recess to contact in the situation that generating element expands, can improve the cooling effectiveness that generating element expands the charge storage element in the situation.
In above-mentioned charge storage element, also can be constructed as follows: described generating element is accommodated in the described outer packaging container, and what make described generating element is horizontal direction axially, and described second direction is vertical direction; Described recess is formed on the top of described outer packaging container and at least one party's in the bottom the described inwall.According to this charge storage element, the top of packaging container, bottom can near the outer packaging container of generating element configuration, can make the charge storage element miniaturization outside.
In above-mentioned charge storage element, also can be constructed as follows: the wall thickness of the neighboring area that the wall ratio in the zone that is formed with described recess of described outer packaging container should the zone is thin.According to this charge storage element, can utilize the thinner wall section that forms recess and make the wall thickness attenuation, improve the cooling effectiveness of charge storage element.
In above-mentioned charge storage element, also can be constructed as follows: the outer wall in the zone that is formed with described recess of described outer packaging container is formed with the second protuberance.According to this charge storage element, can by forming the surface area that the second protuberance enlarges outer wall on the outer wall of packaging container outside, can improve the cooling effectiveness of charge storage element.
In above-mentioned charge storage element, also can be constructed as follows: be formed with protrusion in the neighboring area in the zone that is formed with described recess of the inwall of described outer packaging container.
According to the present invention, charge storage element miniaturization ground is formed.
Description of drawings
Fig. 1 is the exploded view of monocell;
Fig. 2 is the cutaway view of the monocell of the first execution mode;
Fig. 3 is the stereogram of the housing of the first execution mode;
Fig. 4 is the cutaway view of the monocell of the second execution mode;
Fig. 5 is the cutaway view of the monocell of the 3rd execution mode;
Fig. 6 is the cutaway view of the monocell of other execution modes;
Fig. 7 is the stereogram of the lid of other execution modes;
Fig. 8 is the cutaway view of the monocell of other execution modes;
Fig. 9 is the stereogram of the housing of other execution modes;
Figure 10 is the cutaway view of the monocell of other execution modes.
Description of reference numerals
14 monocells; 50 generating elements; 62 housings; The 62A inwall; The 62B outer wall; 64 recesses; 66 protuberances; 68 lids; 80 bottoms; 82 side surface part; The gap of CL regulation.
Embodiment
＜the first execution mode 〉
Below, referring to figs. 1 through Fig. 3 the first execution mode is described.
1. the structure of monocell
Fig. 1 is the stereogram of the monocell 14 of present embodiment.Monocell 14 is secondary cells of energy repeated charge, more specifically says lithium ion battery.The monocell 14 of a plurality of present embodiments is that bus interconnects and carries on for example power type motor vehicle or mixed motivity type motor vehicle by the plate member with conductivity, provides electric power to the power source that utilizes electric energy to carry out work.Monocell 14 is examples of charge storage element.
As shown in Figure 1, monocell 14 comprises electrode unit 20, generating element 50, holder 60 and housing 62.Below, with the above-below direction of Fig. 1 above-below direction as monocell 14, will with the direction of the lateral vertical of the larger side of area in the side of housing 62 fore-and-aft direction as monocell 14, will always describe with the direction of the lateral vertical of the less side of the area right and left as monocell 14.Above-below direction is an example of second direction, and fore-and-aft direction is an example of first direction, and left and right directions is an axial example of generating element 50.
In electrode unit 20, a pair of positive terminal 22 and negative terminal 24 are configured in the upper surface of lid 68 side by side along left and right directions.In addition, be provided with a group of collector body 28A, the 28B that is connected with each electrode terminal 22,24 and extends from the lower surface of lid 68 downwards.Each collector body 28A, 28B are formed by the metallic plate with adequate thickness respectively for obtaining large allowable current, and positive electrode collector 28A is formed by for example aluminium alloy plate, and negative electrode collector 28B is formed by for example copper alloy plate.In the central authorities of lid 68, be provided with pressure in housing 62 and be higher than the non-restoring type safety valve 70 that discharges the gas in the housing 62 in the situation more than the fiducial value.
Generating element 50 constitutes barrel shape, and this barrel shape is wound into platypelloid type with the state of the not shown barrier film of clamping between positive plate 52 and negative plate 54.Positive plate 52 and negative plate 54 form respectively the band shape take coiling direction as length direction under deployed condition.Positive plate 52 is formed with positive electrode active material layer on the surface that forms banded aluminium foil, and on an edge that extends along its length direction, is formed with the anodal collector foil 52A that does not form positive electrode active material layer and expose aluminium foil.In addition, negative plate 54 is formed with negative electrode active material layer on the surface that forms banded Copper Foil, and on an edge that extends along its length direction, is formed with the negative pole collector foil 54A that does not form negative electrode active material layer and expose Copper Foil.
Reel overlappingly positive plate 52 and negative plate 54 so that anodal collector foil 52A compares barrier film and negative plate 54 more by a distolateral configuration, and make negative pole collector foil 54A compare barrier film and positive plate 52 more by another distolateral configuration.Thus, distolateral only stacked and be provided with highlightedly anodal collector foil 52A at generating element 50, distolateral only stacked and be provided with highlightedly negative pole collector foil 54A at another.
As shown in Figure 1, generating element 50 take its axially as left and right directions and the mode that forms along the vertical direction platypelloid type be configured, and be connected with collector body 28A, the 28B of electrode unit 20.That is, generating element 50 is to be orthogonal on the axial section, and the mode that the width of fore-and-aft direction is narrower than the width of above-below direction is configured, and is with along the vertical direction than being configured along the large state of fore-and-aft direction projecting degree.
Anodal collector foil 52A is configured in the right side of generating element 50, is connected with positive electrode collector 28A at the lateral parts that extends to along the vertical direction linearity.Negative pole collector foil 54A is configured in the left side of generating element 50, is connected with negative electrode collector 28B at the lateral parts that extends to along the vertical direction linearity.
Generating element 50 is accommodated in housing 62 with after collector body 28A, 28B are connected.Therefore, generating element 50 take its axially as left and right directions and the state that forms along the vertical direction platypelloid type be accommodated in housing 62.
2. the section shape of monocell
Represented the cutaway view of monocell 14 at the II-II section place vertical with the left and right directions of Fig. 1 among Fig. 2.As shown in Figure 2, in monocell 14, between housing 62 and lid 68 and generating element 50, be provided with the clearance C L of the regulation shown in the arrow 72.Therefore, at the use initial stage of monocell 14, shown in the double dot dash line among Fig. 2, even discharge and recharge the heating that causes and the variation of ambient temperature expands generating element 50, can prevent that also housing 62 and lid 68 from contacting with generating element 50.In addition, with the use preliminary phase ratio of monocell, in the use later stage of monocell 14, generating element 50 expands.Clearance C L is set as at the use later stage of monocell 14 housing 62 and lid 68 and generating element 50 firm accessible degree, thus, in the use later stage of monocell 14, can prevent that housing 62 and lid 68 and generating element 50 from contacting with each other with the pressure that surpasses fiducial value and interfere, prevent from occurring because generating element is damaged the problems such as paradoxical discharge and abnormal heating.
As mentioned above, generating element 50 configures in the mode that forms along the vertical direction platypelloid type, and the end on the above-below direction forms circular-arc.And, the bottom 80 of housing 62 with generating element 50 below on the relative inwall 62A, be formed with generating element 50 below recess 64 corresponding to outstanding shape.In the present embodiment, recess 64 only is formed on the bottom 80 of housing 62, does not form recess 64 in the side surface part 82 of lid 68 and housing 62.
Such as Fig. 2, shown in Figure 3, recess 64 on the fore-and-aft direction farthest expanding in the relative scope of outstanding minimum point and the peripheral extent thereof downwards with generating element 50, form the ditch shape at left and right directions.As shown in Figure 2, at recess 64, enlarged surface is long-pending by inwall 62A is deformed to the outside of monocell 14, and thus, the zone that is formed with recess 64 of bottom 80 is compared with the zone that does not form recess 64 and formed thin-walled.The end of generating element 50 belows is an example of the first protuberance.
Recess 64 forms the most deeply in the scope relative with the minimum point of generating element 50.In order to keep securely the intensity of housing 62, the degree of depth of dark scope of recess 64 is preferably below 70% of thickness of the bottom 80 of housing 62, and more preferably 20%～50% of the thickness of the bottom 80 of housing 62.In Fig. 2 etc., understand for convenient, represented deeper recess 64, but in the present embodiment, the degree of depth of the darkest scope of recess 64 form housing 62 bottom 80 thickness 30%.
Identical with the end of generating element 50 belows, recess 64 forms circular-arc at the section vertical with left and right directions, and its center of curvature is configured in generating element 50 on the center line on the fore-and-aft direction.In addition, the radius of curvature of recess 64 is greater than the radius of curvature of the end of generating element 50 belows.Therefore, the bottom 80 of generating element 50 and housing 62 is not at the boundary portion 64A of recess 64 but the most approaching at the center of the darkest recess 64 of recess 64.
In monocell 14, the distance between the end of generating element 50 belows and recess 64 centers is set to the clearance C L of regulation.Therefore, among Fig. 2 between the neighboring area that does not form recess 64 of ends shown in the arrow 74, generating element 50 belows and recess 64 peripheries on above-below direction apart from K than the regulation clearance C L short.
3. effect of the present invention
(1) in the monocell 14 of present embodiment, form recesses 64 by the bottom 80 at housing 62, can being set as apart from K shown in the arrow among Fig. 2 74 is shorter than the clearance C L of regulation.Therefore, will be set as the prior art that equates with the clearance C L that stipulates apart from K with needs and compare, and can near generating element 50 configuration housings 62, can make monocell 14 miniaturizations.
(2) in the monocell 14 of present embodiment, form recesses 64 by the bottom 80 at housing 62, enlarge the surface area of the inwall 62A of bottom 80, and the zone that is formed with recess 64 of bottom 80 is compared with the zone that does not form recess 64 form thin-walled.Therefore, compare with the situation that does not form recess 64, can near generating element 50 configuration housings 62, can make monocell 14 miniaturizations.In addition, form recess 64 by the inwall at housing 62, can dwindle the distance between generating element 50 and monocell 14 outsides, and can enlarge housing 62 and surface areas generating element 50 opposed inwalls, can improve by housing 62 cooling effectiveness of monocells 14.
(3) degree of depth of recess 64 is darker, more can make monocell 14 miniaturizations, more can improve the cooling effectiveness of monocell 14, but then, if the degree of depth of recess 64 is excessively dark, the intensity variation of housing 62 then.In the present embodiment, the degree of depth of the darkest scope of recess 64 form housing 62 bottom 80 thickness 30%, so can keep securely the intensity of housing 62, and can make monocell 14 miniaturizations, improve the cooling effectiveness of monocell 14.
(4) in the monocell 14 of present embodiment, the radius of curvature of recess 64 is greater than the radius of curvature of the end of relative generating element 50 belows, so recess 64 centers that form the most deeply in the recess 64 and the distance between the generating element 50 can be set as the clearance C L of regulation, can make monocell 14 miniaturizations.In addition, even in the situation that set as described above, at the boundary portion 64A of recess 64, and the distance between the generating element 50 can not be set as shorter than the clearance C L of regulation yet.
(5) in the monocell 14 of present embodiment, do not form recess 64 in the side surface part 82 of housing 62, the side surface part 82 of housing 62 forms the plane.Therefore, when generating element 50 expands, can suppress positive plate 52 that generating element 50 has and negative plate 54 on fore-and-aft direction away from.Thus, positive plate 52 and the increase of negative plate 54 away from the internal resistance of the generating element 50 that causes can be suppressed, the stable output characteristic of monocell 14 can be guaranteed.
＜the second execution mode 〉
With reference to Fig. 4 the second execution mode is described.
1. the section shape of monocell
The monocell 14 of present embodiment and the difference of the first execution mode be, the outer wall 62B in the zone that is formed with recess 64 of the bottom 80 of housing 62 is formed with protuberance 66.Therefore, bottom 80 at the housing 62 of present embodiment, come enlarged surface long-pending by form recess 64 and protuberance 66 at inwall 62A and outer wall 62B, on the other hand, the zone that is formed with recess 64 and protuberance 66 of bottom 80 forms identical thickness with the zone that does not form recess 64 and protuberance 66.Protuberance 66 is an example of the second protuberance.In addition, for the content identical with the first execution mode, the repetitive description thereof will be omitted.
2. effect of the present invention
In the monocell 14 of present embodiment, form the surface area that recess 64 enlarges the inwall 62A of bottom 80 by the bottom 80 at housing 62, and form the surface area that protuberance 66 enlarges the outer wall 62B of bottom 80 by the bottom 80 at housing 62.Therefore, compare with the situation that does not form recess 64 and protuberance 66, can improve by housing 62 cooling effectiveness of monocell 14.
＜the 3rd execution mode 〉
With reference to Fig. 5 the 3rd execution mode is described.
1. the section shape of monocell
The monocell 14 of present embodiment and the difference of the first execution mode be, is formed with protrusion 76 at the inwall 62A of the area peripheral edge that is formed with recess 64 of the bottom 80 of housing 62.Protrusion 76 is to form simultaneously with recess 64 being pre-formed as recess 64 is formed on plane bottom 80 of housing 62 by punch process.In the bottom 80 of the housing 62 of present embodiment, come enlarged surface long-pending by form recess 64 and protrusion 76 at inwall 62A.
2. effect of the present invention
In the monocell 14 of present embodiment, form recess 64 by the bottom 80 at housing 62, enlarged the surface area of the inwall 62A of bottom 80, and, form protrusion 76 by the inwall 62A in the area peripheral edge that is formed with recess 64 of the bottom 80 of housing 62, further enlarged the surface area of the inwall 62A of bottom 80.Therefore, compare with the situation that does not form recess 64 and protrusion 76, can improve by housing 62 cooling effectiveness of monocell 14.
＜other execution mode 〉
The present invention is not limited to by above-mentioned record and the illustrated execution mode of accompanying drawing, and for example following execution mode is also contained in the technical scope of the present invention.
(1) in the above-described embodiment, represented that as an example of charge storage element secondary cell is monocell 14, but be not limited to this, charge storage element also can be the capacitor with electrochemical phenomena.In addition, also do not limit especially the structure etc. of electrode unit of purposes, the charge storage element of charge storage element.
(2) in the above-described embodiment, represented to form the example of recess 64 in the bottom 80 of housing 62, but be not limited to this, such as Fig. 6, shown in Figure 7, also can on lid 68, also form recess 64.In this situation, recess 64 only is formed at bottom 80 and the lid 68 with the generating element 50 that forms along the vertical direction platypelloid type relative housing 62 on above-below direction, does not form recess 64 in the side surface part 82 of housing 62.Be formed at the recess 64 of lid 68, as shown in Figure 6, on the fore-and-aft direction with generating element 50 scope that farthest outstanding peak is relative upward and peripheral extent thereof in expand, and as shown in Figure 7, form the ditch shape at left and right directions.The end of generating element 50 tops is another example of the first protuberance.
In addition, such as Fig. 8, shown in Figure 9, also can form recess 64 in the side surface part 82 of housing 62.Be formed at the recess 64 of the side surface part 82 of housing 62, as shown in Figure 8, farthest expanding in scope corresponding to outstanding side surface part and the peripheral extent thereof along fore-and-aft direction with generating element 50, and as shown in Figure 9, forming concave shape.In this situation, recess 64 is expanded in roughly half the zone of side surface part 82.The side of generating element 50 on fore-and-aft direction is another example of the first protuberance.
(3) in the above-described embodiment, represented that recess 64 forms circular-arc example, but be not limited to this, also can form rectangular-shaped recess 64.In addition, as shown in figure 10, also can form following shape, that is, form concave shape and upwards be formed with the R(arc in its whole week in the relative bottom 80 of the minimum point with generating element 50 of housing 62) shape.In this situation, recess 64 is expanded in roughly half the zone of bottom 80.
(4) in the above-described embodiment, represent housing 62 by metal examples such as aluminium, but be not limited to this, also can form housing 62 by other metals etc.In addition, although represented to form by punch process the example of housing 62, be not limited to this, also can wait by welding to form housing 62.
(5) in the above-described embodiment, represented the radius of curvature of recess 64 greater than the example of the radius of curvature of the end of generating element 50 belows, but the radius of curvature of recess 64 is equated with the radius of curvature of the end of generating element 50 belows.By recess 64 is equated with the radius of curvature of the end of generating element 50 belows, then in use later stage of monocell 14, in the situation that generating element 50 has occured to expand, can make end and recess 64 comprehensive engagements of generating element 50 belows, can in the use later stage of monocell 14, improve the cooling effectiveness of monocell 14.
(6) situation of inwall formation recess below 64 pairs at housing 62 and lid 68 also is effective.
For housing 62, sometimes form the top open type that the upper end is opened wide in order to improve air-tightness by methods such as deep drawn, in the methods such as deep drawn, the unfavorable condition that 80 thickness forms thicklyer than design load bottom occuring sometimes.In this situation, can not between the end below the generating element 50 and bottom 80, guarantee the gap of stipulating in monocell 14, to use this housing 62, so the rate of finished products variation of housing 62.
In this situation, be formed with recess 64 in the bottom 80 of housing 62, the distance between the center of ends among Fig. 2 shown in the arrow 72, generating element 50 belows and recess 64 is set at the clearance C L of regulation and adds predetermined distance CL1 and the distance that draws.Thus, even the thickness of the bottom 80 of housing 62 forms thicklyer than design load, in the situation that its scope is no more than predetermined distance CL1, also can between the end below the generating element 50 and bottom 80, guarantee the gap of stipulating, can suppress the rate of finished products variation of housing 62.In addition, even add predetermined distance CL1 and in the situation of the distance that draws the distance between the center of the end below the generating element 50 and recess 64 being set as at the clearance C L of regulation, also can will on above-below direction, be set as the clearance C L that is shorter than regulation apart from K between the neighboring area that not form recess 64 of ends shown in the arrow among Fig. 2 74, generating element 50 belows and recess 64 peripheries.
Claims (10)
1. a charge storage element is characterized in that, comprising:
Generating element with first protuberance;
Take in the outer packaging container of described generating element;
The inwall relative with described the first protuberance at described outer packaging container is formed with recess.
2. charge storage element as claimed in claim 1 is characterized in that, described recess forms in the scope of close described first protuberance of the inwall of described outer packaging container.
3. charge storage element as claimed in claim 1 or 2 is characterized in that, described recess has the shape corresponding with described the first protuberance.
4. such as each described charge storage element in the claims 1 to 3, it is characterized in that,
Described generating element forms barrel shape, and the width that this barrel shape has a first direction is narrower than the platypelloid type section with the width of the second direction of described first direction quadrature;
Described recess is formed at described generating element on described inwall relative on the described second direction.
5. charge storage element as claimed in claim 4 is characterized in that, described recess only is formed at described generating element on described inwall relative on the described second direction.
6. such as claim 4 or 5 described charge storage elements, it is characterized in that,
On the section perpendicular to axial direction of described generating element, end and the described recess of described generating element on described second direction forms circular-arcly, and the center of curvature of described end is identical on described first direction with the center of curvature of described recess;
The radius of curvature of described recess is more than the radius of curvature of described end.
7. such as each described charge storage element in the claim 4 to 6, it is characterized in that,
Described generating element is accommodated in the described outer packaging container, and what make described generating element is horizontal direction axially, and described second direction is vertical direction;
Described recess is formed on the top of described outer packaging container and at least one party's in the bottom the described inwall.
8. such as each described charge storage element in the claim 1 to 7, it is characterized in that, the wall thickness of the neighboring area that the wall ratio in the zone that is formed with described recess of described outer packaging container should the zone is thin.
9. such as each described charge storage element in the claim 1 to 7, it is characterized in that, the outer wall in the zone that is formed with described recess of described outer packaging container is formed with the second protuberance.
10. such as each described charge storage element in the claim 1 to 9, it is characterized in that, be formed with protrusion in the neighboring area in the zone that is formed with described recess of the inwall of described outer packaging container.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-054781 | 2012-03-12 | ||
| JP2012054781 | 2012-03-12 | ||
| JP2013005611 | 2013-01-16 | ||
| JP2013-005611 | 2013-01-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103311461A true CN103311461A (en) | 2013-09-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100625681A Pending CN103311461A (en) | 2012-03-12 | 2013-02-28 | Electric storage device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6447619B2 (en) |
| KR (1) | KR102115624B1 (en) |
| CN (1) | CN103311461A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105990596A (en) * | 2014-10-27 | 2016-10-05 | 三星Sdi株式会社 | Method of manufacturing can for secondary battery and secondary battery using the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102284568B1 (en) * | 2014-11-13 | 2021-08-02 | 삼성에스디아이 주식회사 | Rechargeable battery |
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- 2013-02-28 CN CN2013100625681A patent/CN103311461A/en active Pending
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| JPH09265966A (en) * | 1996-03-29 | 1997-10-07 | Sanyo Electric Co Ltd | Rectangular battery outer packaging can |
| JP2005310579A (en) * | 2004-04-22 | 2005-11-04 | Matsushita Electric Ind Co Ltd | Square secondary battery |
| JP2006338992A (en) * | 2005-06-01 | 2006-12-14 | Nec Tokin Corp | Square lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105990596A (en) * | 2014-10-27 | 2016-10-05 | 三星Sdi株式会社 | Method of manufacturing can for secondary battery and secondary battery using the same |
| CN105990596B (en) * | 2014-10-27 | 2019-09-06 | 三星Sdi株式会社 | Method of the manufacture for the tank of secondary cell and the secondary cell using the tank |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6447619B2 (en) | 2019-01-09 |
| KR102115624B1 (en) | 2020-05-26 |
| JP2017098259A (en) | 2017-06-01 |
| KR20130105370A (en) | 2013-09-25 |
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