CN103165839B - Secondary cell - Google Patents
Secondary cell Download PDFInfo
- Publication number
- CN103165839B CN103165839B CN201210541200.9A CN201210541200A CN103165839B CN 103165839 B CN103165839 B CN 103165839B CN 201210541200 A CN201210541200 A CN 201210541200A CN 103165839 B CN103165839 B CN 103165839B
- Authority
- CN
- China
- Prior art keywords
- wall section
- thinner wall
- outer rim
- metallic plate
- secondary cell
- 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.)
- Active
Links
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides and be a kind ofly conducive to suppressing cost and the secondary cell of operating accuracy improving safety valve.This secondary cell, comprise the housing of electrode body and this electrode body accommodating, wherein said housing is by warpage metallic plate, and the outer rim of the described metallic plate of warpage is welded to one another and is formed, form the thinner wall section thinner than other part thickness of described metallic plate in the outer rim of described metallic plate as safety valve.
Description
Technical field
The present invention relates to secondary cell.
Background technology
Using motor in the electric automobile or hybrid vehicle of drive source, as the battery to motor supply electric power, widely use the lithium rechargeable battery of accommodating electrode body in the housing.
In lithium rechargeable battery, according to using state, there is the gas occurred from electrode body and cause in housing the situation pressing and rise.
Therefore, housing is provided with pressure in housing and exceedes safety valve in limited time for pressing in open.
The structure of safety valve well known in the prior art is sticky note metal forming on the peristome being formed at housing, thus when crush in metal forming is subject to split time realization in press off and put.
In addition, patent documentation 1 discloses following technology, is formed the thinner wall section be made up of the marking expressed portion of channel-shaped on the surface of housing by laser processing etc., makes this thinner wall section play function as safety valve.
Patent documentation 1: Japanese Unexamined Patent Publication 2006-155971 publication.
But, for the former prior art, the complex structure of safety valve and be unfavorable for reducing costs.
In addition, for the prior art of the latter, limited owing to improving machining accuracy, be therefore unfavorable for the precision improving safety valve work.
Summary of the invention
The present invention proposes in view of the problem of prior art described above, its object is to provide a kind of suppress cost while, be conducive to the secondary cell of the precision improving safety valve work.
In order to reach object as above, secondary cell of the present invention comprises the housing of electrode body and this electrode body accommodating, wherein said housing is by warpage metallic plate, and the outer rim of the described metallic plate of warpage is welded to one another and is formed, form the thinner wall section thinner than other part thickness of described metallic plate in the outer rim of described metallic plate as safety valve.
Further, described housing comprises: body, has the accommodation space of the opening for accommodating described electrode body; Be different from the cap of described body, be provided with the terminal be connected with described electrode body, and for closing described accommodation space; Wherein, described thinner wall section is located at described body.
In addition, described electrode body is made up of by the coiling body repeatedly reeled the belt body comprising positive pole and negative pole, the end face of the relatively described coiling body of described thinner wall section and arranging.
Further, the outer rim being positioned at described thinner wall section is thicker than the other parts thickness of described thinner wall section.
In addition, the outer rim and the outer rim that do not form described thinner wall section adjacent with this outer rim that are positioned at described thinner wall section coincide and are welded to one another.
According to the present invention as above, the thinner wall section with safety valve function is formed in the outer rim for the metallic plate welded, and is therefore conducive to simply and processes accurately, and while being conducive to suppressing cost, improves the operating accuracy of safety valve.
According to the present invention as above; thinner wall section is not formed in the cap being provided with terminal; and be formed on body; therefore the interior pressure of housing uprises; thinner wall section is broken and gas is discharged time; the electrolyte leaked from the thinner wall section of breaking is difficult to touch the terminal of cap, thus is conducive to reducing the possibility causing short circuit etc.
According to the present invention as above; the end face of the relative coiling body of thinner wall section and arranging; the gas produced from coiling body when therefore thinner wall section is broken can outwards flow out from the broken portion of thinner wall section swimmingly, thus is conducive to playing the function as safety valve most effectively.
According to the present invention as above, the outer rim being positioned at thinner wall section is formed as thicker than the other parts thickness of thinner wall section, is therefore conducive to the weld job guaranteeing thinner wall section.
According to the present invention as above, the outer rim being positioned at thinner wall section coincides with the outer rim not forming thinner wall section and welds, and is therefore conducive to the weld job guaranteeing thinner wall section.
Accompanying drawing explanation
Fig. 1 (A) is the stereogram of the secondary cell 10 of the first embodiment; Fig. 1 (B) is for welding the stereogram of the body 16 of the housing 14 of formation by metallic plate 24 warpage; Fig. 1 (C) is the plane graph of the metallic plate 24 before warpage.
The outer rim 3002 of thinner wall section 30 aligns with the outer rim of half end face portion 26 and the A-A line cutaway view of the Fig. 1 (A) of the first case welded for illustrating by Fig. 2 (A); The outer rim 3002 of thinner wall section 30 aligns with the outer rim of half end face portion 26 and the A-A line cutaway view of the Fig. 1 (A) of the second case welded for illustrating by Fig. 2 (B); The outer rim 3002 of thinner wall section 30 aligns with the outer rim of half end face portion 26 and the A-A line cutaway view of the Fig. 1 (A) of the 3rd example of welding for illustrating by Fig. 2 (C).
Fig. 3 is the stereogram that the 4th example of welding that the outer rim 3002 of thinner wall section 30 and the outer rim of half end face portion 26 to be coincided is shown.
Fig. 4 is the stereogram of the secondary cell 10 of the variation that thinner wall section 30 shape is shown.
Fig. 5 (A) is the stereogram of the secondary cell 10 of the second embodiment; Fig. 5 (B) is for welding the stereogram of the body 16 of the housing 14 of formation by metallic plate 24 warpage; Fig. 5 (C) is the plane graph of the metallic plate 24 before warpage.
Fig. 6 (A) is the stereogram of the secondary cell 10 of the 3rd embodiment; Fig. 6 (B) is for welding the stereogram of the body 16 of the housing 14 of formation by metallic plate 24 warpage; Fig. 6 (C) is the plane graph of the metallic plate 24 before warpage.
Fig. 7 (A) is the stereogram of the secondary cell 10 of the 4th embodiment; Fig. 7 (B) is for welding the stereogram of the body 16 of the housing 14 of formation by metallic plate 24 warpage; Fig. 7 (C) is the plane graph of the metallic plate 24 before warpage.
Fig. 8 (A) is the stereogram of the secondary cell 10 of the 5th embodiment; Fig. 8 (B) is for welding the stereogram of the body 16 of the housing 14 of formation by metallic plate 24 warpage; Fig. 8 (C) is the plane graph of the metallic plate 24 before warpage.
The plane graph of the position relationship of the end face that Fig. 9 (A) is thinner wall section 30 with coiling body 12A that the first embodiment is shown; The plane graph of the position relationship of the end face that Fig. 9 (B) is thinner wall section 30 with coiling body 12A that the second embodiment is shown; The plane graph of the position relationship of the end face that Fig. 9 (C) is thinner wall section 30 with coiling body 12A that the variation of the second embodiment is shown; The plane graph of the position relationship of the end face that Fig. 9 (D) is thinner wall section 30 with coiling body 12A that the 3rd embodiment is shown; The plane graph of the position relationship of the end face that Fig. 9 (E) is thinner wall section 30 with coiling body 12A that the 4th embodiment is shown; The plane graph of the position relationship of the end face that Fig. 9 (F) is thinner wall section 30 with coiling body 12A that the 5th embodiment is shown.
* symbol description *
10: secondary cell 12: electrode body
14: housing 16: body
18: cap 20: metallic plate
22: bottom surface sections 24: side surface part
26: half end face portion 28: end face portion
30: thinner wall section 3002: outer rim
32: safety valve 42: bottom faces
44: side surface part 46: cap
Embodiment
(the first embodiment)
Hereinafter, with reference to the accompanying drawings of embodiments of the invention.
In the present embodiment, the situation that secondary cell is made up of lithium rechargeable battery is described, but the present invention is also applicable to the secondary cell except lithium rechargeable battery.
As shown in Fig. 1 (A), the secondary cell 10 of the present embodiment comprises the housing 14 of electrode body 12 and accommodating described electrode body 12.
Housing 14, in laterally longer rectangular plate-like, comprises body 16 and cap 18.
For body 16, by metallic plate 20 warpage, and the outer rim of the metallic plate 20 of warpage is welded to one another and is formed.In addition, in this manual " welding " refer to, include the use of the welding of laser beam etc. or all modes such as joint based on soldering.
The material of metallic plate 20 can use the existing known various metal materials such as stainless steel, aluminium, steel.
Fig. 1 (C) shows the metallic plate 20 before warpage.
Metallic plate 20 comprises bottom surface sections 22, a pair side surface part 24 and four and half end face portion 26.
Bottom surface sections 22 is in laterally longer rectangular shape.
A pair side surface part 24 in laterally longer rectangular shape, and is connected respectively with the relatively short side of bottom surface sections 22.
Half and half end face portion 26 is connected with the minor face of a pair side surface part 24 respectively.
As shown in Fig. 1 (B), for metallic plate 20, the border part of its bottom surface sections 22 and side surface part 24, and the border part of side surface part 24 and half end face portion 26 is by right angle warpage.And the outer rim of half end face portion 26 relative to each other is in alignment with each other and is engaged by welding, and the outer rim forming the minor face of half end face portion 26 and bottom surface sections 22 is in alignment with each other and is engaged by welding.
So, by warpage and welding formed and there is top by the body 16 of accommodation space S opened.
Further, weld by the outer rim of half end face portion 26 end face portion 28 forming body 16 each other mutually.
In the present embodiment, one and half end face portion 26 in four and half end face portion 26 form thinner wall section 30.
This thinner wall section 30 is formed as more thinner than the other parts thickness of metallic plate 20.
Thinner wall section 30 plays the function of the safety valve 32 of secondary cell 10, presses in electrode body 12 produces for discharge.
Thinner wall section 30 is formed in the outer rim of half end face portion 26, specifically, is formed in the edge of half end face portion 26 of welding opposite side the part that aligns.
Therefore, the safety valve 32 of the present embodiment is configured in the centre of the cross direction of the end face portion 28 of housing 14.
Thinner wall section 30 can use double end face portion 26 to carry out rolling or the existing known various processing method such as grinding is formed.
In this situation, formed, so be conducive to simply implementing high-precision processing because thinner wall section 30 comprises the outer rim of half end face portion 26.
Such as, extruded metal plate 20 and when forming thinner wall section 30, easily can be breaking at not as the part that thinner wall section 30 uses in the thin-walled portion produced in calender line, thus can simply form thinner wall section 30.
In addition, formed because thinner wall section 30 comprises the outer rim of half end face portion 26, so the thickness of thinner wall section 30 can be measured simply and accurately, thus be conducive to the thickness and precision improving thinner wall section 30.
On the contrary, the part beyond the outer rim of metallic plate 24 is difficult to form high-precision thinner wall section 30, and is difficult to simply and measure the thickness of the thin part 30 formed in those parts accurately.
As shown in Fig. 2 (A), (B), the outer rim 2602 of half end face portion 26 that the outer rim 3002 of thinner wall section 30 is soldered with this outer rim 3002 aligns and welds.
In this situation, as shown in Figure 2 (A) shows; thinner wall section 30 can be set to the outside off normal more to the inside than the body 16 except this thinner wall section 30, as shown in Fig. 2 (B), thinner wall section 30 can also be set to the outside off normal more laterally than the body 16 except this thinner wall section 30.
In addition, when the outer rim of thinner wall section 30 being aligned with the outer rim of half end face portion 26 and weld, if the difference of the thickness of the thickness of thinner wall section 30 and half end face portion 26 is larger, and the thickness of thinner wall section 30 is less, then the weld job of thinner wall section 30 becomes more difficult.
Therefore, as shown in Fig. 2 (C), if the outer rim 3002 being positioned at thinner wall section 30 is formed as thicker than other segment thicknesses of thinner wall section 30, be then conducive to the weld job guaranteeing thinner wall section 30.
In addition, the mode that the outer rim 3002 of thinner wall section 30 aligns with the outer rim 2602 of half end face portion 26 and welds by replacement, as shown in Figure 3, also can by the outer rim 3002 being positioned at thinner wall section 30 and the outer rim 2602 of opposite side of welding this outer rim 3002, the outer rim 2602 namely not forming thinner wall section 30 coincides and welds.That is, the outer rim being positioned at thinner wall section 30 is formed as near to connect the outer rim without thinner wall section 30 of this outer rim more outstanding, and this ledge is used for welding, thus is conducive to the weld job guaranteeing thinner wall section 30.
In addition, if the outer rim 3002 of thinner wall section 30 is welded to the outer rim 2602 of half end face portion 26, then the intensity of the outer rim 3002 of soldered thinner wall section 30 can become the remainder higher than thinner wall section 30.
If the intensity of thinner wall section 30 becomes too high, then press in housing 14 when rising, thinner wall section 30 is difficult to break.In other words, in the profile length of thinner wall section 30, the ratio shared by the length of the outline portion except outer rim 3002 more increases, and thinner wall section 30 is more easily broken.
Such as, the semicircular situation of the profile considering as Fig. 1 (A) shownschematically thinner wall section 30 to be radius size be R, and the profile of thinner wall section 30 are as shown in Figure 4 minor faces be R, long limit is 2R and long limit is configured to the rectangular situation of outer rim 3002.
Now, in the girth of thinner wall section 30, except the girth opposed outer edge 3002 of outer rim 3002 length shared by ratio, rectangle is higher than semicircle, and therefore rectangle easily reduces the intensity of thinner wall section 30 and thinner wall section 30 is easily broken.
So, according to the crackly degree of required thinner wall section 30, contour shape or the size of thinner wall section 30 reasonably can be selected.
As shown in Fig. 1 (A), electrode body 12 is contained in the accommodation space S of body 16.
Electrode body 12 is made up of the coiling body 12A reeled repeatedly by the belt body getting involved barrier film between positive pole and negative pole.
In more detail, electrode body 12 is made up of positive pole, negative pole and two barrier films.
Positive pole is the large belt shape of length: width.
Just very three-decker, is made up of the positive pole collector foil being positioned at thickness direction central authorities, the positive active material that formed on its two sides.Positive pole collector foil is connected with positive side terminal described later by not shown link.
Positive pole collector foil uses aluminium foil, and positive active material uses cobalt acid lithium etc.
Negative pole is the large belt shape of length: width.
Negative pole is three-decker, is made up of the negative pole collector foil being positioned at thickness direction central authorities, the negative electrode active material that formed on its two sides.Negative pole collector foil is connected with minus side terminal described later by not shown link.
Negative pole collector foil uses Copper Foil, and negative electrode active material uses material with carbon element etc.
Two barrier films are the large band shape of length: width, are made up of the dielectric film of the moveable Porous of lithium ion.
Electrode body 12 is that positive pole and negative pole are got involved by two barrier films and reel repeatedly after coinciding and form, and is flat oblong shape in cross section.
Particularly, stack gradually with the order of barrier film, positive pole, barrier film, negative pole, make barrier film be positioned at outside, negative pole is positioned at rear flank, repeatedly reels.
Coiling body 12A, it is axially perpendicular to end face portion 28 and is contained in accommodation space S.
In the present embodiment, as shown in Fig. 9 (A), thinner wall section 30 is relative with the end face 1202 of coiling body 12A and arrange.
Cap 18 by solder joints on body 16 for closed accommodation space S.Cap 18 is provided with the positive side terminal 34 and minus side terminal 36 that are connected with electrode body 12.
Be equipped with on the body 16 of electrode body 12 by cap 18 is joined to, and assembling is in the housing 14 of laterally longer rectangular plate-like.
According to the present embodiment as above, the thinner wall section 30 with safety valve 32 function comprises the outer rim of half end face portion 26 and is formed, and is therefore conducive to simply and processing thin-walled portion 30 accurately.And then while being conducive to suppressing cost, improve the operating accuracy of safety valve 32.
In addition, because of the pressure (the interior pressure in housing 14) of gas produced from coiling body 12A, when thinner wall section 30 is broken, gas easily flows out to the axis of coiling body 12A, and is difficult to flow out to the direction vertical with the axis of coiling body 12A.This is because as previously mentioned, coiling body 12A will get involved the belt body winding repeatedly structure formed of barrier film between positive pole and negative pole.
The gas produced from coiling body 12A flows out along the axis of coiling body 12A.In the present embodiment, as shown in Fig. 9 (A), thinner wall section 30 relatively coiling body 12A end face 1202 and arrange.Therefore, thinner wall section 30 to be positioned at from coiling body 12A produce the discharge direction of gas.And then when thinner wall section 30 is broken, gas outwards can be flowed out from the broken portion of thinner wall section 30 more swimmingly by beeline.Thus, be conducive to playing the function as safety valve 32 most effectively.
In addition, in the present embodiment; thinner wall section 30 is not formed in the cap 18 being provided with terminal 34,36; and be formed on body 16; therefore press in housing 14 and uprise; thinner wall section 30 is broken and gas is discharged time, the electrolyte leaked from the thinner wall section 30 of breaking is difficult to touch further the terminal 34,36 of cap 18, thus is conducive to reducing the possibility causing short circuit etc.
(the second embodiment)
Below, the second embodiment is described.
In a first embodiment, safety valve 32 is disposed in the centre of the Width of the end face portion 28 of housing 14, and the difference of the second embodiment and the first embodiment is that safety valve 32 is disposed on the end of the Width of the end face portion 28 of housing 14.
In addition, below in an example, the part same or identical with the first embodiment, gives identical symbol and omits or be simply described.
Fig. 5 (C) shows the metallic plate 20 before warpage.
Metallic plate 20 comprises bottom surface sections 22, a pair side surface part 24 and pair of end face 28.
Bottom surface sections 22 is in laterally longer rectangular shape.
A pair side surface part 24, respectively in laterally longer rectangular shape, is connected on the relatively short side of bottom surface sections 22.
Pair of end face 28 is connected to the minor face of a side surface part 24 in a pair side surface part 24.
As shown in Figure 5 (B), for metallic plate 20, the border part of its bottom surface sections 22 and side surface part 24, and the border part of side surface part 24 and end face portion 28 is by right angle warpage.
Further, end face portion 28 aligns and solder joints with the outer rim of side surface part 24, and end face portion 28 aligns and solder joints with the outer rim of the minor face forming bottom surface sections 22.
So, by warpage and welding formed and there is top by the body 16 of accommodation space S opened.
In second embodiment, thinner wall section 30 is formed in the soldered outer rim of end face portion 28, in more detail, is formed in the position aligned with the minor face as the side surface part 24 of welding opposite side.
Thus safety valve 32, in the end face portion 28 of housing 14, is connected on the boundary line of the side surface part 24 of end face portion 28 and side and configures.
In addition, identical with the first embodiment, coiling body 12A its be axially perpendicular to end face portion 28 and be contained in accommodation space S.
Second embodiment has the possible structure of the following two kinds, namely, as shown in Fig. 9 (B), with the first embodiment in the same manner; the structure set by end face 1202 of the relative coiling body 12A of thinner wall section 30; and as shown in Fig. 9 (C), although thinner wall section 30 is located near the end face 1202 of coiling body 12A, thinner wall section 30 is not the structure of opposing end surface 1202.
According to the second such embodiment, the thinner wall section 30 with safety valve 32 function comprises the outer rim of end face portion 28 and is formed, therefore identical with the first embodiment, is conducive to simply and accurately processing thin-walled portion 30.And then, while being conducive to suppressing cost, improve the operating accuracy of safety valve 32.
In addition, as shown in Fig. 9 (B), when thinner wall section 30 relatively coiling body 12A end face 1202 and arrange time, identical with the first embodiment, when thinner wall section 30 is broken, gas outwards flows out from the broken portion of thinner wall section 30 swimmingly by beeline, thus is conducive to playing the function as safety valve 32 most effectively.
In addition, as shown in Fig. 9 (C), when thinner wall section 30 is not the end face 1202 of relative coiling body 12A and is located near end face 1202, the gas produced from coiling body 12A can along the axial flow of coiling body 12A, therefore when thinner wall section 30 is broken, gas can outwards flow out from the broken portion of thinner wall section 30 swimmingly, thus is conducive to giving full play to the function as safety valve 32.
In addition, identical with the first embodiment; thinner wall section 30 is not formed in the cap 18 being provided with terminal 34,36, and is formed on body 16, be therefore conducive to reducing the terminal 34,36 caused by electrolyte leaked from the thinner wall section 30 of breaking and be shorted equally likely possibility.
(the 3rd embodiment)
Below, the 3rd embodiment is described.
In 3rd embodiment, be that safety valve 32 is arranged on the position of the outer rim of some side surface part 24 in two side surface part 24 comprising housing 14 with the difference of first, second embodiment.
Fig. 6 (C) shows the metallic plate 20 before warpage.
Identical with the second embodiment, metallic plate 20 comprises bottom surface sections 22, a pair side surface part 24 and pair of end face 28, as shown in Fig. 6 (B), also identical with the second embodiment and omit the description to the assembling of body 16.
In 3rd embodiment, thinner wall section 30 is formed in the soldered outer rim of side surface part 24, in more detail, is formed in and the position aligned as the end face portion 28 of welding opposite side.
In addition, identical with the first embodiment, coiling body 12A its be axially perpendicular to end face portion 28 and be contained in accommodation space S, therefore as shown in Fig. 9 (D), although the end face 1202 of thinner wall section 30 relative coiling body 12A, be located near end face 1202.
According to the 3rd embodiment, the thinner wall section 30 had as safety valve 32 function comprises the outer rim of the side surface part 24 of side and is formed, therefore identical with the first embodiment, is conducive to simply and processing thin-walled portion 30 accurately.Thus, while being conducive to suppressing cost, improve the operating accuracy of safety valve 32.
In addition, as shown in Fig. 9 (D), although the end face 1202 of the not relative coiling body 12A of thinner wall section 30, but be arranged near end face 1202, therefore the gas produced from coiling body 12A is along the axial flow of coiling body 12A, so gas can outwards flow out from the broken portion of thinner wall section 30 swimmingly when thinner wall section 30 is broken, thus be conducive to giving full play to the function as safety valve 32.
In addition, identical with the first embodiment; thinner wall section 30 is not formed in the cap 18 being provided with terminal 34,36, and is formed on body 16, be therefore conducive to reducing the terminal 34,36 caused by electrolyte leaked from the thinner wall section 30 of breaking and be shorted equally likely possibility.
(the 4th embodiment)
Below, the 4th embodiment is described.
In 4th embodiment, be that safety valve 32 is arranged on the position of the outer rim of the bottom surface sections 22 comprising housing 14 with the difference of first, second embodiment.
Fig. 7 (C) shows the metallic plate 20 before warpage.
Identical with the first embodiment, metallic plate 20 comprises bottom surface sections 22, a pair side surface part 24 and four and half end face portion 26, as shown in Fig. 7 (B), identical with the first embodiment and omit the description to the assembling of body 16.
In 4th embodiment, thinner wall section 30 is formed in the outer rim of bottom surface sections 22, in more detail, be formed in as end face portion 28(two and half end face portion 26 of welding opposite side) the position that aligns of minor face on.
In addition, coiling body 12A its be axially perpendicular to end face portion 28 and be contained in accommodation space S, therefore as shown in Fig. 9 (E), although the end face 1202 of thinner wall section 30 relative coiling body 12A, be arranged near end face 1202.
Cap 18 by solder joints on body 16, for closed accommodation space S.The positive side terminal 34 and minus side terminal 36 that are connected with electrode body 12 is provided with at cap 18.
Be equipped with on the body 16 of electrode body 12 by cap 18 is joined to, the housing 14 in laterally longer rectangular plate-like can be formed.
According to the 4th embodiment, the thinner wall section 30 with safety valve 32 function comprises the outer rim of bottom surface sections 22 and is formed, therefore identical with the first embodiment, is conducive to simply and processing thin-walled portion 30 accurately.Thus, while being conducive to suppressing cost, improve the operating accuracy of safety valve 32.
In addition, as shown in Fig. 9 (E); although the end face 1202 of thinner wall section 30 relative coiling body 12A; be arranged near end face 1202; gas therefore produced from coiling body 12A is along the axial flow of coiling body 12A; when thinner wall section 30 is broken, gas can outwards flow out from the broken portion of thinner wall section 30 swimmingly, thus is conducive to giving full play to the function as safety valve 32.
In addition, identical with the first embodiment; thinner wall section 30 is not formed in the cap 18 being provided with terminal 34,36, and is formed on body 16, be therefore conducive to reducing the terminal 34,36 caused by electrolyte leaked from the thinner wall section 30 of breaking and be shorted equally likely possibility.
(the 5th embodiment)
Below, the 5th embodiment is described.
In first to fourth embodiment, describe the situation that housing 14 is flat rectangular plate-like, and will illustrate that in the 5th embodiment housing 14 is for columned situation.
Fig. 8 (C) shows the metallic plate 40 before warpage.
Metallic plate 40 comprises bottom surface sections 42 and side surface part 44.
Bottom surface sections 42 is in discoideus.
Side surface part 44 is rectangle shape.
Thinner wall section 30 is formed in the outer rim of the side minor face forming side surface part 44, in more detail, is formed in the position aligned with the outer rim of the opposite side minor face forming soldered side surface part 44.
As shown in Fig. 8 (B), side surface part 44 is flexed into drum, and the outer rim forming the minor face of side surface part 44 is engaged by welding toward each other together.
In addition, the outer rim forming the long limit, side of side surface part 44 is aligned with the outer rim of the circumference forming bottom surface sections 22 and is engaged by welding.
So, by warpage and welding formed and there is top by the body 16 of accommodation space S opened.
The diametric(al) of its axial side surface part 44 with forming cylinder of coiling body 12A is consistent and be contained in accommodation space S.
Further, as shown in Fig. 9 (F), thinner wall section 30 relatively coiling body 12A end face 1202 and arrange.
Cap 46 by solder joints on body 16, for closed accommodation space S.Cap 46 is provided with the positive side terminal 34 and minus side terminal 36 that are connected with electrode body 12.
Be equipped with on the body 16 of electrode body 12 by cap 46 is joined to, form cylindrical housing 14.
According to the 5th embodiment, the thinner wall section 30 with safety valve 32 function is formed in the outer rim of side surface part 42, therefore identical with the first embodiment, is conducive to simply and processing thin-walled portion 30 accurately.Thus, while being conducive to suppressing cost, improve the operating accuracy of safety valve 32.
In addition, as shown in Fig. 9 (F); thinner wall section 30 relatively coiling body 12A end face 1202 and arrange; therefore identical with the first embodiment; when thinner wall section 30 is broken, gas outwards flows out from the broken portion of thinner wall section 30 more swimmingly by beeline, thus be conducive to playing the function as safety valve 32 most effectively.
In addition, identical with the first embodiment; thinner wall section 30 is not formed in the cap 46 being provided with terminal 34,36, and is formed on body 16, be therefore conducive to reducing the terminal 34,36 caused by electrolyte leaked from the thinner wall section 30 of breaking and be shorted equally likely possibility.
In the above-described embodiment, describing housing 14 is flat rectangular plate-like or the situation of cylindrical shape, but the shape of housing 14 is not confined to rectangular plate-like or cylindrical shape, and the present invention is applicable to the existing known secondary cell with the housing of various shape.
Claims (6)
1. a secondary cell, comprises the housing of electrode body and accommodating described electrode body, it is characterized in that:
Described housing is by warpage metallic plate, and the outer rim of the described metallic plate of warpage is welded to one another and is formed, and described housing comprises:
Body, has the accommodation space of the opening for accommodating described electrode body;
Be different from the cap of described body, be provided with the terminal be connected with described electrode body, and for closing described accommodation space;
Be separated with described cap in the position that the outer rim of the described metallic plate of the warpage of described body is in alignment with each other and formed and the thinner wall section thinner than other part thickness of described metallic plate as safety valve,
Wherein, described metallic plate comprises bottom surface sections, a pair side surface part and four and half end face portion, the outer rim of half end face portion relative to each other in described four and half end face portion is in alignment with each other and is engaged by welding, and one and half end face portion in described four and half end face portion form described thinner wall section.
2. secondary cell according to claim 1, is characterized in that:
Described electrode body is made up of by the coiling body repeatedly reeled the belt body comprising positive pole and negative pole,
The end face of the relatively described coiling body of described thinner wall section and arranging.
3. secondary cell according to claim 1, is characterized in that:
The outer rim being positioned at described thinner wall section is thicker than the other parts thickness of described thinner wall section.
4. secondary cell according to claim 2, is characterized in that:
The outer rim being positioned at described thinner wall section is thicker than the other parts thickness of described thinner wall section.
5. secondary cell according to claim 1, is characterized in that:
The outer rim and the outer rim that do not form described thinner wall section adjacent with described outer rim that are positioned at described thinner wall section coincide and are welded to one another.
6. secondary cell according to claim 2, is characterized in that:
The outer rim and the outer rim that do not form described thinner wall section adjacent with described outer rim that are positioned at described thinner wall section coincide and are welded to one another.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-275883 | 2011-12-16 | ||
| JP2011275883A JP5821605B2 (en) | 2011-12-16 | 2011-12-16 | Secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103165839A CN103165839A (en) | 2013-06-19 |
| CN103165839B true CN103165839B (en) | 2016-01-06 |
Family
ID=48588743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210541200.9A Active CN103165839B (en) | 2011-12-16 | 2012-12-13 | Secondary cell |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5821605B2 (en) |
| KR (1) | KR101412344B1 (en) |
| CN (1) | CN103165839B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5869354B2 (en) * | 2012-02-01 | 2016-02-24 | 日立マクセル株式会社 | Exterior can for prismatic lithium ion secondary battery and prismatic lithium ion secondary battery |
| JP5825155B2 (en) * | 2012-03-08 | 2015-12-02 | 株式会社豊田自動織機 | Case for power storage device, power storage device, secondary battery, and moving body |
| KR101563578B1 (en) * | 2013-09-05 | 2015-10-27 | 주식회사 엘지화학 | Method for Preparation of Prismatic Battery Cell Using Metal Plate |
| KR101939832B1 (en) * | 2015-09-23 | 2019-01-17 | 주식회사 엘지화학 | Battery module and battery pack including the same and method for manufacturing a battery module casing |
| DE102015224302A1 (en) * | 2015-12-04 | 2017-06-08 | Robert Bosch Gmbh | Housing for battery systems |
| KR102175940B1 (en) | 2017-08-22 | 2020-11-06 | 주식회사 엘지화학 | Battery pack and vehicle comprising the same |
| DE102018207330A1 (en) * | 2018-05-09 | 2019-11-14 | Bayerische Motoren Werke Aktiengesellschaft | Memory cell for a memory device of a motor vehicle, memory device for a motor vehicle and motor vehicle |
| KR20200094936A (en) * | 2019-01-31 | 2020-08-10 | 삼성에스디아이 주식회사 | Secondary battery |
| CN109935744A (en) * | 2019-02-14 | 2019-06-25 | 南京优仁有色金属有限公司 | A kind of new energy car battery shell and its production method |
| KR20210057595A (en) * | 2019-11-12 | 2021-05-21 | 삼성에스디아이 주식회사 | Secondary battery |
| KR20210099469A (en) * | 2020-02-04 | 2021-08-12 | 엘지전자 주식회사 | Battery cell |
| CN111341949A (en) * | 2020-03-27 | 2020-06-26 | 湖北亿纬动力有限公司 | Battery shell, battery, manufacturing method of battery and battery module |
| CN217589148U (en) * | 2022-04-22 | 2022-10-14 | 惠州亿纬锂能股份有限公司 | Battery case and battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339830A (en) * | 2001-10-19 | 2002-03-13 | 陈步霄 | Square casing for lithium ion cell and its producing method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6369464U (en) * | 1986-10-24 | 1988-05-10 | ||
| JPH05123757A (en) * | 1991-11-06 | 1993-05-21 | Tokyo Electric Co Ltd | Bent and formed box |
| JPH0817417A (en) * | 1994-07-05 | 1996-01-19 | Matsushita Electric Ind Co Ltd | Dry battery |
| JPH09300032A (en) * | 1996-05-14 | 1997-11-25 | Kawatetsu Container Kk | Manufacture of can body of metallic can |
| JP2001236929A (en) * | 2000-02-22 | 2001-08-31 | Sumitomo Metal Ind Ltd | Battery case made of titanium |
| JP2001307705A (en) * | 2000-04-25 | 2001-11-02 | Gs-Melcotec Co Ltd | Encapsulated battery |
| JP2002198011A (en) * | 2000-12-27 | 2002-07-12 | Shin Kobe Electric Mach Co Ltd | Square-shaped nonaqueous electrolyte secondary cell |
| JP2003017029A (en) | 2001-06-29 | 2003-01-17 | Sanyo Electric Co Ltd | Sealing plate and weld-sealed battery using the same |
-
2011
- 2011-12-16 JP JP2011275883A patent/JP5821605B2/en active Active
-
2012
- 2012-11-15 KR KR1020120129691A patent/KR101412344B1/en active IP Right Grant
- 2012-12-13 CN CN201210541200.9A patent/CN103165839B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1339830A (en) * | 2001-10-19 | 2002-03-13 | 陈步霄 | Square casing for lithium ion cell and its producing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013125737A (en) | 2013-06-24 |
| CN103165839A (en) | 2013-06-19 |
| JP5821605B2 (en) | 2015-11-24 |
| KR101412344B1 (en) | 2014-06-25 |
| KR20130069382A (en) | 2013-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103165839B (en) | Secondary cell | |
| US8603670B2 (en) | Secondary battery | |
| US9583742B2 (en) | Method of manufacturing battery, and battery | |
| US10062873B2 (en) | Secondary battery and battery pack using the same | |
| US9755217B2 (en) | Sealing plate for prismatic secondary battery and prismatic secondary battery using the sealing plate | |
| EP2337137A2 (en) | Rechargeable battery | |
| US8991232B2 (en) | Sealing plate for prismatic secondary battery, method for producing the same, and prismatic secondary battery using the same | |
| WO2011093503A1 (en) | Battery, battery production device, and battery production method | |
| US9209432B2 (en) | Secondary battery and method for producing the same | |
| US11342632B2 (en) | Battery module | |
| KR20120022071A (en) | Square-sealed type secondary battery | |
| US20150188116A1 (en) | Joint structure, joining method, secondary battery, and method of manufacturing secondary battery | |
| JP5884692B2 (en) | Laser welding method | |
| JP2008016250A (en) | Battery and manufacturing method of battery | |
| US9017843B2 (en) | Prismatic secondary battery | |
| JPWO2014050329A1 (en) | Power storage device and welding method | |
| CN109873211B (en) | Battery module | |
| JP5568512B2 (en) | Square battery | |
| JP2014102997A (en) | Case and manufacturing method of the same | |
| JP6160676B2 (en) | Prismatic secondary battery | |
| JP2014093124A (en) | Sealed battery | |
| JP2013187071A (en) | Power storage device case, power storage device, secondary battery, and moving body | |
| JP6094343B2 (en) | Electricity storage element | |
| US20240128612A1 (en) | Power storage device | |
| JP6061005B2 (en) | Prismatic secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Tokyo Port Area, Japan Patentee after: Mitsubishi Jidosha Kogyo Kabushiki Kaisha Address before: Tokyo, Japan Patentee before: Mitsubishi Jidosha Kogyo Kabushiki Kaisha |