CN100340011C - End cap structure of rectangular cell - Google Patents
End cap structure of rectangular cell Download PDFInfo
- Publication number
- CN100340011C CN100340011C CNB200410088582XA CN200410088582A CN100340011C CN 100340011 C CN100340011 C CN 100340011C CN B200410088582X A CNB200410088582X A CN B200410088582XA CN 200410088582 A CN200410088582 A CN 200410088582A CN 100340011 C CN100340011 C CN 100340011C
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- China
- Prior art keywords
- plane area
- square plate
- end cap
- manufactured head
- cap structure
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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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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The present invention discloses an end cap structure of a rectangular cell, which at least comprises a rectangular flat plate and a rivet head, wherein the rectangular flat plate has a first surface and a second surface which are opposite, and the second surface is a flat surface; the rivet head is positioned on the first surface of the rectangular flat plate, a first surface region of the rectangular flat plate is divided into a first flat surface region and a second flat surface region, wherein the first flat surface region is lower than the second flat surface region, and the first flat surface region and the second flat surface region are adjacent to the rivet head.
Description
Technical field
The present invention relates to a kind of end cap structure of rectangular cell, particularly relevant for a kind of end cap structure of rectangular lithium ion battery.
Background technology
Along with portable electronic product towards light, thin, short, little development, and to the portable electronic product requirement that up duration increases of once charging, the secondary cell of small-sized, lightweight and tool high-energy-density is to become one of indispensable spare part of portable electronic product.
In secondary cell, because advantage such as lithium ion battery has high working voltage, energy density is big, in light weight and the life-span is long, and can satisfy the light little demand of portable electronic product.Therefore, lithium ion battery has been widely used in the portable electronic product at present, for example mobile computer (Notebook), personal digital assistant (PersonalDigital Assistant; PDA) and mobile phone (Mobile Phone) etc.
At present, the Safety Design of the end casing of lithium ion battery is mainly under relief valve design and the end casing conducting strip is set.Relief valve design is during at the undesired rising of cell internal pressure, utilizes to open the valve mode and carry out pressure release, to avoid battery explosion.Yet relief valve design is for battery deformation unprotect ability.In addition, the design that conducting strip is set under end casing is to erect in side direction at battery to flatten, and when promptly the Y direction is flattened (Y Crush), allows conducting strip contact with the tank body of battery in advance and makes external short circuit, explodes because of overheated to avoid inside battery.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of end cap structure of rectangular cell, it only need change the structural design of end casing, can produce external short circuit when battery produces side direction deformation, and can not need under end casing, to be provided with in addition conducting strip, to simplify processing procedure.
Another technical problem that the present invention will solve provides a kind of end cap structure of rectangular cell, and as separating, the thickness of the planar structure of a side of end casing is than the thin thickness of opposite side with manufactured head.Thus, the next fragility in plane that the structural strength on the plane of end casing thinner thickness will be thicker than opposite side.When rectangular cell was flattened by the Y direction, the plane of end casing thinner thickness can produce deformation and convex curved earlier, and this protruding end casing plane contacts with manufactured head, and then the path of causing external short circuit when rectangular cell deformation.So, can promote battery fail safe in the use.
The technical problem again that the present invention will solve provides a kind of end cap structure of rectangular cell, and the back side of end casing comprises the V-groove that runs through the end casing minor axis at least.Since the structural strength that end casing has a V-groove place a little less than, therefore when rectangular cell is flattened by the Y direction, the V-groove place can produce deformation earlier and make the end casing face protruding and contact with manufactured head, and then causes the path of external short circuit.Thus, can reduce the danger of battery deformation.
The another technical problem that the present invention will solve provides a kind of end cap structure of rectangular cell, the gap that has no insulation between the short sidewall of manufactured head and the plane area of square plate, therefore when the deformation of end casing projection, can effectively promote the contact probability of square plate and manufactured head.
For this reason, the present invention proposes a kind of end cap structure of rectangular cell, comprises at least: a square plate has a relative first surface and a second surface, and wherein second surface is a plane; One manufactured head is positioned on the first surface of above-mentioned square plate, and the first surface of square plate is separated into one first plane area and one second plane area, wherein the height of first plane area is lower than the height of second plane area, and first plane area and second plane area are adjacent to above-mentioned manufactured head; And one insulating barrier between this first surface of this manufactured head and this square plate.
According to a preferred embodiment of the present invention, above-mentioned square plate comprises that also V-groove is positioned on the second surface of square plate and runs through the minor axis of second surface.
Because first plane area of manufactured head both sides is different with the thickness of second plane area, and make the structure of the plane area of winning comparatively fragile, the second surface of adding square plate has the V-groove that runs through the second surface minor axis.Therefore, square plate can make the manufactured head contact earlier and the formation external short circuit when rectangular cell is subjected to the extrusion of Y direction external force, and then can reach the purpose of the fail safe that promotes the battery use.
Description of drawings
Fig. 1 illustrates the top view according to the end cap structure of a kind of rectangular cell of a preferred embodiment of the present invention.
Fig. 2 illustrates the following view according to the end cap structure of a kind of rectangular cell of a preferred embodiment of the present invention.
Fig. 3 illustrates the profile that is obtained along the I-I hatching of the end cap structure of Fig. 1 rectangular cell.
Fig. 4 illustrates the profile of end cap structure after the Y direction is flattened test of a kind of rectangular cell of a preferred embodiment of the present invention.
Fig. 5 illustrates the top view according to the end cap structure of a kind of rectangular cell of another preferred embodiment of the present invention.
The drawing reference numeral explanation:
100: end cap structure 102: square plate
104: surface 106: surface
108: plane area 110: plane area
112: manufactured head 114: groove
116: insulating barrier 118: bending
120: bending 122: liquid injection port
200: end cap structure 202: square plate
204: surface 206: plane area
208: plane area 210: plane area
212: manufactured head 216: insulating barrier
222: liquid injection port
Embodiment
The present invention discloses a kind of end cap structure of rectangular cell, can promote the safety that battery uses.In order to make narration of the present invention more detailed and complete, can and cooperate Fig. 1 with reference to following description to shown in Figure 4.
Please refer to Fig. 1, Fig. 1 illustrates the top view according to the end cap structure of a kind of rectangular cell of a preferred embodiment of the present invention.The end cap structure 100 of this rectangular cell comprises square plate 102 and manufactured head 112 at least, wherein manufactured head 112 is positioned on the surface 104 of square plate 102, and 102 fens different electrical electrodes of accessory of manufactured head 112 and square plate carry different electrical electric charges respectively.In preferred embodiment of the present invention, rectangular cell can for example be a lithium ion battery, and the material of square plate 102 can be an aluminium for example, and manufactured head 112 is a negative pole, and square plate 102 is anodal.Manufactured head 112 is preferably on the middle section on the surface 104 that is positioned at square plate 102, and this manufactured head 112 is distinguished into both sides with the surface 104 of square plate 102, and wherein a side is a plane area 108, and opposite side then is a plane area 110.Plane area 108 and plane area 110 contiguous manufactured heads 112, and plane area 110 is preferably three sides that are centered around manufactured head 112, plane area 108 then vicinity at the opposite side of manufactured head 112, so that manufactured head 112 and plane area 110 are positioned at the same side of square plate 102.The height of plane area 108 is lower than plane area 110.Have more insulating barrier 116 between manufactured head 112 and the square plate 102, as shown in Figure 3, to isolate manufactured head 112 and square plate 102.Insulating barrier 116 also may extend into the long sidewall of manufactured head 112 and the space between the plane area 110, and the plane area 108 of the short sidewall of manufactured head 112 and square plate 102 and the space between the plane area 110 only with interstitial area every, there is no insulating barrier, as shown in Figure 1.Yet, more noticeablely be, insulating barrier 116 also may extend between the plane area 108 and plane area 110 of the short sidewall of manufactured head 112 and square plate 102, as long as the short sidewall of manufactured head 112 and the plane area 108 of square plate 102 and the space between the plane area 110 have the gap.Have more liquid injection port 122 on the square plate 102, inject battery for electrolyte.
A feature of the present invention is exactly that the short sidewall of manufactured head 112 and the space between plane area 108 and the plane area 110 have the gap, therefore can guarantee that the square plate 102 of plane area 108 can touch manufactured head 112 when end cap structure 100 compressive deformations.
Please refer to Fig. 2, Fig. 2 illustrates the following view according to the end cap structure of a kind of rectangular cell of a preferred embodiment of the present invention.Square plate 102 has 102 surfaces 106 with respect to surface 104 in addition, and wherein this surface 106 is a plane.In preferred embodiment of the present invention, the surface 106 of square plate 102 has more the minor axis that groove 114 runs through surface 106.Wherein, groove 114 is preferably V-shaped, and groove 114 does not pass through the below of manufactured head 112.Groove 114 is preferably on the surface 106 that is positioned at respect to plane area 100.Yet, more noticeablely be that groove 114 also can be positioned on the surface 106 with respect to plane area 108.
Please refer to Fig. 3, Fig. 3 illustrates the profile that is obtained along the I-I hatching of the end cap structure of Fig. 1 rectangular cell.Because plane area 110 is higher than plane area 108, and surface 106 is the plane, so the thickness of the square plate 102 of plane area 110 is greater than the thickness of the square plate 102 of plane area 108.Thus, the structural strength of plane area 108 can be less than the structural strength of plane area 110, and forms place's structure weakness in the boundary of plane area 108 and plane area 110.Insulating barrier 116 is used electrical isolation square plate 102 and manufactured head 112 between the surface 104 of manufactured head 112 and square plate 102.In preferred embodiment of the present invention, groove 114 is positioned on the surface 106 with respect to plane area 110, and the obvious thin thickness of the square plate 102 around of the thickness of the square plate 102 at groove 114 places.Therefore, the structural strength at groove 114 places can reduce, and forms another place's structure weakness.
Please refer to Fig. 4, Fig. 4 illustrates the profile of end cap structure after the Y direction is flattened test of a kind of rectangular cell of a preferred embodiment of the present invention.Because the structural strength of plane area 108 is lower, therefore when the side direction risers of battery is subjected to the pressure of direction 117 (being the Y direction), is positioned at the square plate 102 first deformation of meeting and the projection of plane area 108 these sides, and on plane area 108, produces bending 120.Add the short sidewall of manufactured head 112 and the space between plane area 108 and the plane area 110 and have the gap, will make the square plate 102 of plane area 108 touch manufactured head 112 thus.On the other hand, because the structural strength of the square plate 102 at groove 114 places is also low than square plate 102 on every side, when therefore the side direction risers of battery is subjected to the pressure of direction 117, the square plate 102 at groove 114 places is understood first deformation and produce bending 118 on plane area 110, and then makes the square plate 102 of plane area 110 touch manufactured head 112.When the square plate 102 of plane area 108 and plane area 110 touches manufactured head 112, all can form the both positive and negative polarity short circuit at outside batteries.Thus, can when producing lateral deformation because of external force, battery avoid causing temperature to raise and then produce exploding because of internal short-circuit of battery prior on the end cap structure 100 external short circuit taking place, using.
In addition, owing to be out of shape by lateral pressure at battery, the square plate 102 of end cap structure 100 forms the both positive and negative polarity short circuits with manufactured head 112, and short-circuit resistance is descended, and short circuit current is evenly distributed on the square plate 102.Therefore, can effectively avoid local high heat to produce.
Please refer to Fig. 5, Fig. 5 illustrates the top view according to the end cap structure of a kind of rectangular cell of another preferred embodiment of the present invention.End cap structure 200 comprises square plate 202 and manufactured head 212 at least, and wherein manufactured head 212 is positioned on the surface 204 of square plate 202, and 202 fens different electrical electrodes of accessory of manufactured head 212 and square plate, carries different electrical electric charges respectively.In preferred embodiment of the present invention, rectangular cell can for example be a lithium ion battery, and the material of square plate 202 can be an aluminium for example, and manufactured head 212 is a negative pole, and square plate 202 is anodal.Manufactured head 212 is preferably on the middle section of the upper surface 204 that is positioned at square plate 202.Outside manufactured head 212, the surface 204 of square plate 202 be distinguished into two plane areas 206, plane area 208, with plane area 210.Plane area 208 and plane area 210 lay respectively at two major axis of square plate 202, and two plane areas 206 then are positioned on two minor axises of square plate 202.Two plane areas 206, plane area 208 and plane area 210 are respectively adjacent to four sides of manufactured head 212.The height of plane area 208 equates that with the height of plane area 210 height of two plane areas 206 is then than plane area 208 and plane area 210 height.Have more insulating barrier 216 between manufactured head 212 and the square plate 202, to isolate manufactured head 212 and square plate 202.Insulating barrier 216 also may extend into the sidewall of manufactured head 212 and the space between the plane area 206.Have more liquid injection port 222 on the square plate 202, inject battery for electrolyte.In this preferred embodiment, the lower surface of square plate 202 is a plane.
Because plane area 206 is higher than plane area 210 and plane area 208, and the lower surface of square plate 202 is the plane, so the thickness of the square plate 202 of plane area 206 is greater than the thickness of plane area 210 with the square plate 202 of plane area 208.Thus, the structural strength of plane area 210 and plane area 208 can be less than the structural strength of plane area 206, and forms the structure weakness in the boundary of plane area 208 and plane area 210 and plane area 206.
Because plane area 210 is lower with the structural strength of plane area 208, therefore when the side direction risers of battery is subjected to the pressure of Y direction, it is also protruding with the first deformation of square plate 202 meetings of plane area 208 to be positioned at plane area 210, and makes the plane area 210 and the square plate 202 of plane area 208 touch manufactured head 212.
By the invention described above preferred embodiment as can be known, an advantage of the present invention is exactly because the thickness difference of the square plate of manufactured head both sides, the second surface of adding square plate has the V-groove that runs through the second surface minor axis, and the structure of a side of end cap structure is comparatively fragile.Thus, can be subjected to external force when extrusion to risers, square plate is contacted with manufactured head and form external short circuit in battery side.Therefore, can reach the purpose of the fail safe that improves the battery use.
By the invention described above preferred embodiment as can be known, an advantage more of the present invention is exactly because have the gap between the plane area of the short sidewall of manufactured head and square plate, therefore when the deformation of end casing projection, can significantly promote the contact probability of square plate and manufactured head.
By the invention described above preferred embodiment as can be known, when another advantage of the present invention was out of shape because battery is subjected to lateral pressure exactly, the square plate of end cap structure can form the both positive and negative polarity short circuit with manufactured head.Thus, short circuit current is evenly distributed on the square plate.Therefore, can effectively avoid local high heat to produce, and then can avoid being out of shape the safety issue that is caused because of battery.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (6)
1. the end cap structure of a rectangular cell is characterized in that, comprises at least:
One square plate has a relative first surface and a second surface, and wherein this second surface is a plane;
One manufactured head is positioned on this first surface of this square plate, and this first surface of this square plate is separated into one first plane area and one second plane area, wherein the height of this first plane area is lower than the height of this second plane area, and this first plane area and this second plane area are adjacent to this manufactured head; And
One insulating barrier is between this first surface of this manufactured head and this square plate.
2. the end cap structure of rectangular cell according to claim 1 is characterized in that this rectangular cell is a lithium ion battery.
3. the end cap structure of rectangular cell according to claim 1 is characterized in that the material of this square plate is an aluminium.
4. the end cap structure of rectangular cell according to claim 1 is characterized in that, this square plate comprises that also a V-groove is positioned on this second surface and runs through the minor axis of this second surface.
5. as the end cap structure of rectangular cell as described in the claim 4, it is characterized in that this V-groove is positioned on this second surface with respect to this second plane area.
6. as the end cap structure of rectangular cell as described in the claim 4, it is characterized in that this V-groove is positioned on this second surface with respect to this first plane area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410088582XA CN100340011C (en) | 2004-11-05 | 2004-11-05 | End cap structure of rectangular cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410088582XA CN100340011C (en) | 2004-11-05 | 2004-11-05 | End cap structure of rectangular cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1770498A CN1770498A (en) | 2006-05-10 |
| CN100340011C true CN100340011C (en) | 2007-09-26 |
Family
ID=36751615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200410088582XA Expired - Fee Related CN100340011C (en) | 2004-11-05 | 2004-11-05 | End cap structure of rectangular cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100340011C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5985478A (en) * | 1997-09-29 | 1999-11-16 | Samsung Display Devices Co., Ltd. | Pressure responsive cap assembly for rectangular battery |
| CN1235382A (en) * | 1998-05-08 | 1999-11-17 | 三星电管株式会社 | Cap assembley of prismatic type secondary battery |
| JP2002164025A (en) * | 2000-11-22 | 2002-06-07 | Matsushita Electric Ind Co Ltd | Square secondary battery |
-
2004
- 2004-11-05 CN CNB200410088582XA patent/CN100340011C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5985478A (en) * | 1997-09-29 | 1999-11-16 | Samsung Display Devices Co., Ltd. | Pressure responsive cap assembly for rectangular battery |
| CN1235382A (en) * | 1998-05-08 | 1999-11-17 | 三星电管株式会社 | Cap assembley of prismatic type secondary battery |
| JP2002164025A (en) * | 2000-11-22 | 2002-06-07 | Matsushita Electric Ind Co Ltd | Square secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1770498A (en) | 2006-05-10 |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070926 Termination date: 20211105 |