CN203746983U - Sealed type battery - Google Patents
Sealed type battery Download PDFInfo
- Publication number
- CN203746983U CN203746983U CN201420066400.8U CN201420066400U CN203746983U CN 203746983 U CN203746983 U CN 203746983U CN 201420066400 U CN201420066400 U CN 201420066400U CN 203746983 U CN203746983 U CN 203746983U
- Authority
- CN
- China
- Prior art keywords
- liquid injection
- hole
- injection hole
- large footpath
- containment member
- 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.)
- Expired - Lifetime
Links
- 238000002347 injection Methods 0.000 claims abstract description 84
- 239000007924 injection Substances 0.000 claims abstract description 84
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000002093 peripheral effect Effects 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 abstract description 32
- 239000012530 fluid Substances 0.000 description 37
- 239000003792 electrolyte Substances 0.000 description 25
- 230000001681 protective effect Effects 0.000 description 6
- 230000035900 sweating Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- 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
Landscapes
- Filling, Topping-Up Batteries (AREA)
Abstract
The utility model provides a sealed type battery. The sealed type battery is provided with a liquid injection hole (7) formed in a cover body (3) for sealing an opening in the housing of the sealed type battery, and a sealing member (8) for sealing the liquid injection hole (7), wherein a protrusion ring (12) protruding towards the outer side is formed along the whole periphery of the peripheral surface of the part, embedded into the liquid injection hole (7), of the sealing member (8), the size of the outer diameter of the protrusion ring (12) is larger than the size of the inner diameter of the liquid injection hole (7), and a liquid injection bolt (8) is pressed into the liquid injection hole (7). By using the above structure provided by the utility model, the liquid injection bolt (8) does not move during welding, and occurrence of poor welding of the liquid injection bolt (8) can be prevented.
Description
Technical field
The utility model relates to a kind of sealing cell.
Background technology
In prior art, as non-aqueous secondary batteries such as lithium ion batteries, for example, by known the sealing cell that the battery container sealing of other generating elements such as electrode body, electrolyte is housed and form.This sealing cell is after electrode body etc. is packed in battery container, from injecting the electrolyte in battery container at the liquid injection hole of battery container (lid) processing in advance, then use containment member (fluid injection bolt) liquid injection hole sealing to be realized to the sealing of battery container.
During with containment member sealing liquid injection hole, conventionally adopt containment member is placed on liquid injection hole, the method for then by laser welding, the whole periphery of the whole outer peripheral edges of containment member and liquid injection hole being welded.But while carrying out laser welding in this way, due to the reason such as pressure, sweating heat of protective gas, containment member is likely subjected to displacement, thereby cause the situation of containment member failure welding to occur.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is, a kind of sealing cell of the situation generation that can prevent containment member failure welding is provided.
As the technical scheme solving the problems of the technologies described above, the utility model provides a kind of sealing cell.Sealing type battery has, the liquid injection hole forming on the lid of using at closing battery shell nozzle and seal the containment member (fluid injection bolt) that this liquid injection hole is used, it is characterized in that: be embedded on the outer peripheral face at the position in described liquid injection hole at described containment member, be formed with outstanding laterally prominent ring along whole periphery, the outside dimension (full-size) of described prominent ring is greater than the internal diameter size of described liquid injection hole, and described containment member is pressed in described liquid injection hole.
The advantage with the sealing cell of the present utility model of said structure is; owing to being provided with prominent ring on the outer peripheral face of containment member; and sealing member is pressed in the liquid injection hole of battery container; so in the time welding; containment member in welding can be because pressure and the sweating heat etc. of protective gas move, thereby can prevent that the situation of failure welding from occurring.
In sealing cell of the present utility model, be preferably, described liquid injection hole has, for holding the hole, large footpath of described containment member and being formed on the diameter holes below this hole, large footpath, the prominent ring of described containment member is provided with, under state in sealing member is pressed into hole, described large footpath, the contact site connecting with the internal face in this hole, large footpath and the lower edge from this contact site extend the rake that the direction to the internal face away from hole, described large footpath tilts on one side downwards on one side.Adopt this structure, at the downside of the contact site of containment member, can form the space that the rake of an internal face by hole, large footpath, step surface (step surface between large hole, footpath and diameter holes) and containment member forms.Thus, after electrolyte injects, even if electrolyte remains on step surface, this residual electrolyte also can accumulate in above-mentioned space, and can not enter between contact site and the internal face in hole, large footpath.Thereby, can prevent the generation of the caused failure welding of electrolyte.
Brief description of the drawings
Fig. 1 is the vertical view of the sealing cell of execution mode of the present utility model.
Fig. 2 is the sectional view (square casing is omitted) of the A-A face in Fig. 1.
Fig. 3 is the sectional view of the A-A face in the Fig. 1 under lid and fluid injection bolt released state.
Fig. 4 is the enlarged drawing of the B part in Fig. 2.
Fig. 5 is the schematic diagram of the welding method for fluid injection bolt is described.
Fig. 6 is the sectional view of the sealing cell of prior art.
Fig. 7 is the schematic diagram of the shortcoming of the sealing cell for prior art is described.
Fig. 8 is the schematic diagram of the shortcoming of the sealing cell for prior art is described.
Embodiment
Below, with reference to Fig. 1-Fig. 5, the sealing cell of present embodiment is described.But the utility model is not by present embodiment is limited.
The sealing cell 1 of present embodiment is closed type non-aqueous secondary battery (for example, lithium rechargeable battery).As shown in Figure 1, sealing cell 1 possesses, and the lid 3 that the square casing 2 of electrode body (not shown) and electrolyte and the opening of sealing square casing 2 are used is housed.This square casing 2 and lid 3, for example, be made up of the lightweights such as aluminium, aluminium alloy, stainless steel, nickel-plated steel and the good metal material of heat conductivity.
In Fig. 1, square casing 2 is the cuboid box body extending to the direction vertical with lid 3 (direction vertical with paper), and has opening on its end face, electrode body and electrolyte can be packed into the inside of this square casing 2 by this opening.
As shown in Figure 1, lid 3 is processed into rectangular shape, engage with square casing 2 by welding, thereby by the closure of openings of square casing 2.On lid 3, be fixedly connected with the positive terminal 4 and the negative terminal 5 that are connected use with outside.These positive terminals 4 and negative terminal 5 are connected with the positive pole and the negative electricity that are contained in the electrode body in square casing 2 respectively.
Mid portion at the long side direction of lid 3 is provided with safety valve 6.This safety valve 6 is constituted as, in the time that the pressure rise of square casing 2 inside is above to setting, and valve opening and the gas of square casing 2 inside is discharged.
In addition, between safety valve 6 and negative terminal 5 on lid 3, be provided with for the liquid injection hole (through hole) 7 to the square casing 2 inner elliptic cross-sections that inject electrolyte.As shown in Figure 3, this liquid injection hole 7 is the step-shaped holes that have hole, large footpath 9 and be formed on the diameter holes 11 of these 9 belows, hole, large footpath, between large hole 9, footpath and diameter holes 11, is formed with step surface 10.Inject electrolyte to square casing 2 is inner from this liquid injection hole 7, liquid injection hole 7 is by fluid injection bolt (containment member) 8 sealings.
Fluid injection bolt 8 is processed to the ellipse identical but smaller with hole, large footpath 9 shapes of elliptic cross-section.As shown in Figure 2, fluid injection bolt 8 is accommodated in the hole, large footpath 9 of liquid injection hole 7, and is being supported by the step surface 10 of these 9 belows, hole, large footpath.Identical with lid 3, fluid injection bolt 8 is for example made up of metal materials such as aluminium, aluminium alloy, stainless steel, nickel-plated steels.
Conventionally, sealing cell 1 can be made by following manufacture method.
(1) be connected by modes such as welding with positive pole and the negative pole that will pack the electrode body in square casing 2 into being respectively fixedly connected on positive terminal 4 on lid 3 and the inner terminal of negative terminal 5.
(2) electrode body after being connected with lid 3 is packed in this square casing 2 from the opening of square casing 2, and cover the opening of square casing 2 with lid 3.Under this state, for example, by laser welding, lid 3 is welded with the part that square casing 2 engages.
(3) from liquid injection hole 7 to the inner electrolyte that injects of square casing 2.Then, fluid injection bolt 8 is pressed into the hole, large footpath 9 of liquid injection hole 7.The push operation of this fluid injection bolt 8 will be in aftermentioned.
(4) carry out laser welding along the welded rails shown in the dotted arrow in Fig. 5, so that the whole circumference of the whole outer peripheral edges of fluid injection bolt 8 and liquid injection hole 7 is welded together.Now, in order to prevent being reduced weld strength by the part of LASER HEAT melting because of oxidation, blow protective gas limit along the direction of thick arrow in Fig. 5 to welding portion limit and carry out laser welding.By such welding, fluid injection bolt 8 can seal liquid injection hole 7, that is, square casing 2 can be sealed by welding fluid injection bolt 8.
Below, the characteristic of present embodiment is described.
First,, with reference to Fig. 6-Fig. 8, the shortcoming of the sealing cell to prior art describes.At this, in the sealing cell of prior art, the part identical with above-mentioned present embodiment adopts identical symbol, and omits the detailed description of same section.
As shown in Figure 6, the sealing cell of prior art is also under the state in the hole, large footpath 9 that fluid injection bolt 108 is placed on to liquid injection hole 7, carry out laser welding along the track identical with the track shown in Fig. 5, by the whole periphery of the whole outer peripheral edges of fluid injection bolt 108 and liquid injection hole 7 is welded together and liquid injection hole 7 is sealed.
But, in the time carrying out laser welding, if the pressure of protective gas moves fluid injection bolt 108, may cause the situation of failure welding to occur.In addition, as shown in Figure 7, for example, if the molten state (state of C portion) of welding while starting is for example, with molten state (state of D portion) midway of welding variant, may cause fluid injection bolt 108 to occur with the situation of the soldered such failure welding of state that tilts.
And, in the sealing cell of prior art, inject after electrolyte, if there is electrolyte to remain on the step surface 10 of lid 3 (with reference to the E of Fig. 8), in the time that fluid injection bolt 108 is pressed into liquid injection hole 7, residual electrolyte (being referred to as below residual electrolyte) can be by fluid injection bolt 108 and step surface 10 pinchings, and the residual electrolyte being extruded overflows (with reference to the F of Fig. 8) sometimes between the outer peripheral face of fluid injection bolt 108 and the internal face in hole, large footpath 9.Now, if enter under the state between the outer peripheral face of fluid injection bolt 108 and the internal face in hole, large footpath 9 and carry out laser welding at electrolyte, can there is the situation of failure welding.
In order to address the above problem; in the present embodiment; as Fig. 2-as shown in Figure 4; on the outer peripheral face of fluid injection bolt 8, be formed with outstanding laterally prominent ring 12 along whole periphery; by outside dimension of this prominent ring 12 being set to such an extent that be greater than the internal diameter size (internal diameter size in hole, large footpath 9) of the liquid injection hole 7 of lid 3; and this fluid injection bolt 8 is pressed in liquid injection hole, in the time carrying out laser welding, fluid injection bolt 8 just can not move because of pressure and the sweating heat etc. of protective gas.
In addition, as shown in Figure 4, prominent ring 12 is provided with, under state in fluid injection bolt 8 is pressed into the hole, large footpath 9 of liquid injection hole 7, the dashdotted upside of contact site 13(of the essentially rectangular (cross sectional shape) connecting with the internal face in hole, large footpath 9) and extend the dashdotted downside of rake 14(of the general triangular (cross sectional shape) tilting to the direction of the internal face away from hole, large footpath 9 on one side downwards on one side from the lower edge of this contact site 13).
As shown in Figure 4, be processed into said structure by the ring 12 of dashing forward, the complete cycle along fluid injection bolt 8 peripheries below contact site 13 forms the space 15 that a cross section is general triangular.Thus, inject after electrolyte, even if remain at electrolyte under the state of step surface 10, fluid injection bolt 8 is pressed onto on step surface 10, residual electrolyte also can be expressed in space 15 by fluid injection bolt 8 and step surface 10.Thereby, can prevent that residual electrolyte from overflowing between the outer peripheral face of fluid injection bolt 8 and the internal face in hole, large footpath 9.Like this, just, there will not be under the state between outer peripheral face and the internal face in hole, large footpath 9 because enter into fluid injection bolt 8 at electrolyte and carry out the situation that laser welding causes failure welding.
In addition, if be full of residual electrolyte in space 15, electrolyte still likely overflows between the outer peripheral face of contact site 13 and the internal face in hole, large footpath 9, therefore will guarantee that space 15 is enough large.At this, if the height till the lower edge (chain-dotted line of Fig. 4) from step surface 10 to contact site 13 is T as the thickness of S, fluid injection bolt 8, the relation between height S and thickness T is preferably, S > 0.11 × T.
Below, the outside dimension of prominent ring 12 is described.
First,, if the outside dimension of prominent ring 12 is excessive, fluid injection bolt 8 is difficult to be pressed in the hole, large footpath 9 of liquid injection hole 7.Therefore, prominent ring 12(contact site 13) outstanding width W be preferably below 100 μ m.As shown in Figure 3, if the outside dimension (full-size) of prominent ring 12 is that the internal diameter size in the hole, large footpath 9 of m, the liquid injection hole 7 corresponding with it is n, the relation between this outside dimension m and internal diameter size n is preferably, and n < m < n+200(μ m).
By the outside dimension m of prominent ring 12 being set to such an extent that be greater than the internal diameter size n of liquid injection hole 9, fluid injection bolt 8 be pressed into hole, large footpath 9 interior after, can be securely fixed in hole, large footpath 9.Thereby in the time carrying out laser welding, fluid injection bolt 8 can not move because of the pressure of protective gas and sweating heat, thereby can effectively prevent that the situation of failure welding from occurring.Meanwhile, meet m) relation of m < n+200(μ by the outside dimension m that makes prominent ring 12, can easily fluid injection bolt 8 be pressed in hole, large footpath 9.
In addition, in above-mentioned present embodiment, prominent ring 12 structures with contact site 13 and rake 14 are illustrated, but are not limited to this, as long as can form at the outer peripheral face of fluid injection bolt 8 space of accumulating residual electrolyte along complete cycle, it is circular-arc for example also can making the longitudinal section of prominent ring.In the case, the camber of circular arc (height of circular arc) meets m < n+200(μ m) when relation, is preferably from step surface 10 to the height on arc summit, is greater than 0.11 × T.
In addition, in above-mentioned present embodiment, the liquid injection hole 7 with hole, large footpath 9, diameter holes 11 and step surface 10 is illustrated, but is not limited to this, also the fluid injection bolt 8 that has prominent ring 12 can be pressed in the liquid injection hole that there is no stage portion.
Claims (2)
1. a sealing cell, has the liquid injection hole forming on the lid of using at closing battery shell nozzle and seals the containment member that this liquid injection hole is used, and it is characterized in that:
Be embedded on the outer peripheral face at the position in described liquid injection hole at described containment member, be formed with outstanding laterally prominent ring along whole periphery,
The outside dimension of described prominent ring is greater than the internal diameter size of described liquid injection hole, and described containment member is pressed in described liquid injection hole.
2. sealing cell as claimed in claim 1, is characterized in that:
Described liquid injection hole has, for holding the hole, large footpath of described containment member and being formed on the diameter holes below this hole, large footpath,
The prominent ring of described containment member is provided with, under state in sealing member is pressed into hole, described large footpath, the contact site connecting with the internal face in this hole, large footpath and the lower edge from this contact site extend the rake that the direction to the internal face away from hole, described large footpath tilts on one side downwards on one side.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420066400.8U CN203746983U (en) | 2014-02-14 | 2014-02-14 | Sealed type battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420066400.8U CN203746983U (en) | 2014-02-14 | 2014-02-14 | Sealed type battery |
Publications (1)
Publication Number | Publication Date |
---|---|
CN203746983U true CN203746983U (en) | 2014-07-30 |
Family
ID=51346745
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201420066400.8U Expired - Lifetime CN203746983U (en) | 2014-02-14 | 2014-02-14 | Sealed type battery |
Country Status (1)
Country | Link |
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CN (1) | CN203746983U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110233214A (en) * | 2019-07-16 | 2019-09-13 | 珠海格力电器股份有限公司 | Battery cover plate assembly and battery |
-
2014
- 2014-02-14 CN CN201420066400.8U patent/CN203746983U/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110233214A (en) * | 2019-07-16 | 2019-09-13 | 珠海格力电器股份有限公司 | Battery cover plate assembly and battery |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
CX01 | Expiry of patent term | ||
CX01 | Expiry of patent term |
Granted publication date: 20140730 |