CN203481288U - Lithium ion battery and cover plate module thereof - Google Patents
Lithium ion battery and cover plate module thereof Download PDFInfo
- Publication number
- CN203481288U CN203481288U CN201320517777.6U CN201320517777U CN203481288U CN 203481288 U CN203481288 U CN 203481288U CN 201320517777 U CN201320517777 U CN 201320517777U CN 203481288 U CN203481288 U CN 203481288U
- Authority
- CN
- China
- Prior art keywords
- cover plate
- lithium ion
- negative pole
- ion battery
- insulating trip
- 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
Images
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
Abstract
The utility model provides a cover plate module of a lithium ion battery. The cover plate module comprises a cover plate main body, a cathode connection sheet, an insulation sheet and a rivet, wherein the cathode connection sheet comprises a riveting part and a tab connection part connected with a cathode tab; the riveting part is connected together with the insulation sheet via the rivet; the connection part is arranged at the end, opposite to the riveting part, on the cathode connection sheet; a limiting part is arranged at the end, corresponding to the tab connection part, of the insulation sheet; a limiting space is formed between the limiting part and the lower surface of the insulation sheet; the tab connection part comprises a limiting end arranged at the top end of the tab connection part; the limiting end is inserted into the limiting space; the limiting part is wider than the limiting end. By adopting the cover plate module provided by the utility model, tilting of the end of the cathode connection sheet in the riveting process can be effectively prevented, occupation of the limited space inside the battery can be reduced, and tilting of the side of the limiting end is prevented. Meanwhile, the utility model also provides the lithium ion battery adopting the cover plate module provided by the utility model.
Description
Technical field
The utility model belongs to lithium ion battery field, relates in particular to a kind of cover plate assembly of lithium ion battery.
Background technology
Lithium ion battery has been widely used in the various fields such as MP3, mobile phone, digital camera, the advantage such as have that voltage is high, capacity is large, long circulation life, quality are light.But related industry is in high speed development, the safety problem of lithium ion battery is still perplexing people.
The cover plate assembly of lithium ion battery comprises cover plate main body, rivet, negative pole brace and insulating trip, battery cover board adopts the mode of riveted joint to make, brace in riveted joint process, because being subject to impulsive force easily causes crookedly around rivet rotary transduction, just exists and the anodal danger being short-circuited if crooked.
Application number is in 201120299666.3 utility model patent, discloses a kind of battery cover of rectangular lithium ion battery, wherein, is provided with the lateral wall of outwards digging on the periphery of insulating trip, and negative pole brace is fixed on the inside that lateral wall impales.This structure, has solved negative pole brace in riveted joint process and has easily rotated and cause crooked technical problem.But, the lithium ion battery that this utility model provides, in riveted joint process, negative pole brace can be out of shape and then occur the situation of perk away from one end of rivet, this,, by taking the very limited space of inside battery, impacts the volume of battery.
Summary of the invention
The utility model is for solving in existing lithium ion battery, the technical problem of negative pole brace meeting perk in one end in riveted joint process, provides a kind of cover plate assembly and lithium ion battery thereof that can effectively prevent negative pole brace lithium ion battery of one end perk in riveted joint process.
In order to address the above problem, the utility model provides a kind of cover plate assembly of lithium ion battery, comprise cover plate main body, negative pole brace, insulating trip and the rivet that three is linked together, insulating trip overlaps between cover plate main body and negative pole brace, negative pole brace comprises caulking part and lug connecting portion for being connected with negative electrode lug, caulking part links together by rivet and insulating trip, lug connecting portion one end relative with caulking part on negative pole brace, wherein, insulating trip one end corresponding with lug connecting portion is provided with limiting section, between limiting section and the lower surface of insulating trip, be formed with spacing space, lug connecting portion comprises the positive stop end that is positioned at lug connecting portion top, positive stop end is inserted in spacing space, the width of limiting section is greater than the width of positive stop end.
Preferably, above-mentioned spacing space is the U-shaped cavity of opening to the right.
Further, insulating trip is provided with near one end of rivet the lateral wall of outwards digging, and negative pole brace is arranged on the inside of lateral wall.
Preferably, above-mentioned limiting section is that the downward flange in insulating trip one end corresponding with lug connecting portion forms.
Preferably, the large 0.05-0.2mm of thickness of the aspect ratio positive stop end in above-mentioned spacing space.
In addition, the utility model also provides a kind of lithium ion battery, comprises shell, pole piece and electrolyte in the enclosure of parcel and the cover plate assembly that seals described shell, wherein, and the cover plate assembly of the lithium ion battery that cover plate assembly provides for the utility model.
The cover plate assembly of the novel lithium ion battery providing of this use is provided, in rivet process, positive stop end can perk, the perk that prevents negative pole brace end in riveted joint process can effectively reduce its taking the inside lithium ion cell confined space, when guaranteeing the security performance of lithium ion battery, the effective volume of limiting lithium ion cell.
Meanwhile, the width of limiting section is greater than the width of positive stop end, when riveted joint, positive stop end integral body all can be controlled to spacing interior volume, guarantees that the side of positive stop end can perk yet.
Accompanying drawing explanation
Fig. 1 is the cover plate assembly schematic cross-section of the lithium ion battery that provides of prior art.
Fig. 2 is the cover plate assembly schematic cross-section of the lithium ion battery that provides of the utility model.
Fig. 3 is A part enlarged drawing in Fig. 2.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the utility model is solved, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The upper and lower, left and right of mentioning during the utility model provides are all for accompanying drawing.As shown in Figure 2, in the structure that the utility model provides, rivet 4 is fixed on one end or a side of negative pole brace 2 or insulating trip 3, so, corresponding negative pole brace 2 or the other end or the opposite side of insulating trip 3, be the one end away from rivet 4 or the side in the utility model, mentioned with it; One end away from rivet 4 described here or a side, for the distance of negative pole brace 2 or 3 liang of tops of insulating trip and rivet 4 Comparatively speaking, top, one end and rivet 4 that rivet 4 is fixing are nearer, for closing on one end of rivet 4, the corresponding other end with it, distant with rivet 4, is called the one end away from rivet 4; Here the negative pole brace 2 of saying is away from one end or a side of rivet 4, lug connecting portion 22 or its top that namely the utility model is mentioned.
" linking together " that the utility model is mentioned, represents a kind of annexation, can by riveted joint, welding, paste etc. mode, each parts are linked together.
As shown in Figure 1, cover plate assembly for the lithium ion battery mentioned in prior art (utility model patent that application number is 201120299666.3), comprise cover plate main body 1, negative pole brace 2 and insulating trip 3, insulating trip 3 overlaps between negative pole brace 2 and cover plate main body 1, three rivets together by rivet 4, shown on negative pole brace 2 away from a side of rivet 4 region for welding mutually with negative electrode lug, it is the lug connecting portion 22 in the utility model, and, on the periphery of insulating trip 3, be provided with the lateral wall 33 of outwards digging, negative pole brace 2 is fixed on the inside that lateral wall 33 impales.
The lithium ion battery providing in above-mentioned prior art, the technical problem that in the time of effectively preventing rivet 4 riveted joint, negative pole brace 2 can tilt, still, does not arrange the parts that prevent 2 perks of negative pole brace.
As shown in Figures 2 and 3, in order to address the above problem, the utility model provides a kind of cover plate assembly of lithium ion battery, comprise cover plate main body 1, negative pole brace 2, insulating trip 3 and the rivet 4 that three is linked together, described insulating trip 3 overlaps between cover plate main body 1 and negative pole brace 2.As can be seen from Figure 2, the position relationship between three is to be followed successively by from top to down: cover plate main body 1, negative pole brace 2 and insulating trip 3.Insulating trip 3 is kept apart cover plate main body 1 and 2 insulation of negative pole brace, and the lower shape of insulating trip 3 and negative pole brace 2 can be designed to same or analogous shape, so that better negative pole brace 2 and cover plate main body 1 are kept apart.The preparation method that this area is conventional, insulating trip 3 is injection-moulded between cover plate main body 1 and rivet 4 and between cover plate main body 1 and negative pole brace 2, by cover plate main body 1 and rivet 4 isolated insulations, simultaneously by cover plate main body 1 and negative pole brace 2 isolated insulations.On cover plate main body 1, be provided with the first through hole, insulating trip 3 is through described the first through hole outward flanging, and insulating trip 3 tops have the second through hole simultaneously, and rivet 4 passes the first through hole and the second through hole and negative pole brace 2 and links together; Generally, be also provided with third through-hole on negative pole brace 2, bottom and the negative pole brace 2 of being convenient to rivet 4 weld together.Above-mentioned overlapping is mainly that embodying between cover plate main body 1, negative pole brace 2 and insulating trip 3 threes is the three stacked position relationships that are added together, and after three is superimposed, then gets up by rivet 4 riveted joints.
In manufacturing process, first prepare the cover plate main body 1 with the first through hole, then insulating trip 3 is injection-moulded on cover plate main body 1 and upper and lower flange, at this moment, position at the first through hole, insulating trip 3 also just injects second through hole, and rivet 4 passes the first through hole and the second through hole and negative pole brace 2 and links together.
Above-mentioned the first through hole, the second through hole and third through-hole, be all the conventional design in this area, and its formation and big or small those skilled in the art can independently set as required, at this, do not do and go into seriously; In addition, those skilled in the art are according to the existing understanding to cover plate assembly, and the position that can know the first through hole, the second through hole and third through-hole is relation extremely, therefore, does not also mark in the accompanying drawings.
Cover plate main body 1 is provided with technique blind hole (not shown) corresponding to insulating trip 3 away from a side of rivet 4, during insulating trip 3 injection moulding, relevant position, under injection pressure, is pressed into above-mentioned technique blind hole, after cooling, insulating trip 3 and cover plate main body 1 can be combined closely.It can be also a plurality of that above-mentioned technique blind hole can be one, according to the size specification of concrete insulating trip 3, suitably chooses.Above-mentioned insulating trip 3, away from a side of rivet 4, is the corresponding position, position of the lug connecting portion 22 providing with the utility model.
In the utility model, for convenience of description, artificial lug connecting portion 22 and caulking part 21 two parts that negative pole brace 2 is divided into.Around being centered around rivet 4, negative pole brace 2 is referred to as caulking part 21, and is referred to as lug connecting portion 22 away from the negative pole brace 2 of rivet 4, and the tab welding that inside battery is drawn, on lug connecting portion 22, is the region for tab welding.In addition, the top of lug connecting portion 22 is the artificial positive stop end 221 that is defined as again, is convenient to combine description inventive point of the present utility model with limiting section 31 and the spacing space 32 of insulating trip 3.Each several part does not represent to separate, can be one-body molded yet; Here separately definition is named, just for the ease of the utility model content of explaining.
As shown in Figures 2 and 3, insulating trip 3 one end corresponding with lug connecting portion 22 is provided with limiting section 31, between limiting section 31 and the lower surface of insulating trip 3, is formed with spacing space 32, and positive stop end 221 is inserted in spacing space 32.During installation, the positive stop end of negative pole brace 2 221 is inserted in spacing space 32, and then with rivet 4, insulating trip 3 and negative pole brace 2 are linked together.Like this, during riveted joint, because limited location end 221 is limited in spacing space 32, negative pole brace 2 can not make because the one end of riveting is stressed positive stop end 221 perks.Positive stop end 221 is the left end of the lug connecting portion 22 that is positioned at spacing space 32 in figure.
In addition, in order better positive stop end 221 to be inserted and to be arranged in spacing space 32, limiting section 31 preferable width are greater than the width of positive stop end 221.The width of limiting section 31 and positive stop end 221 is along the width in direction from the inside to the outside in Fig. 3, that is to say, with the width in the corresponding direction of lithium ion battery thickness.Limiting section 31 is held positive stop end 221 completely, when riveted joint, positive stop end 221 integral body all can be controlled to 32 inside, spacing space; If the width of limiting section 31 is less than the width of positive stop end 221, although positive stop end 221 can perk, if material is softer or stressed when larger, may cause the side perk of lug connecting portion 22, also can affect the inner space of lithium ion battery.
As shown in Figures 2 and 3, spacing space 32 is the U-shaped cavity of opening to the right, is convenient to like this insertion of negative pole brace 2, simultaneously this structure when flange forms or designs in addition all than being easier to.Certainly, the groove of other shapes is also feasible, at this, does not limit.
While inserting spacing space 32 for positive stop end 221, operate simplyr, in this end, chamfering is set; Be convenient to being connected of lug connecting portion 22 and spacing space 32.
In order to prevent that in riveted joint process, negative pole brace 2 is crooked, preferably at insulating trip 3, near one end of rivet 4, be provided with the lateral wall 33 of outwards digging, negative pole brace 2 is arranged on the inside of lateral wall 33.
Limiting section 31 in the utility model, can arrange in addition in insulating trip 3 bottoms, and can be also insulating trip 3 forms away from the downward flange in one end of rivet 4, preferably the latter.Flange forms saving operation, and operation wants simple comparatively speaking.
The large 0.05-0.2mm of thickness of the aspect ratio positive stop end 221 in spacing space 32.Spacing space 32 is the smaller the better in theory, but simpler while considering operation, and the thickness of the ratio positive stop end 221 that the height in spacing space 32 should be done is a bit large a little, preferably 0.1mm.
As shown in Figure 3, for the ease of installing, leave buffering space between positive stop end 221 and the innermost end in spacing space 32, during assembling, the left end of negative pole brace 2 has certain cushion space, and in the time of preventing from riveting, the excessive limiting section 31 that causes of dynamics ruptures.
As shown in Figure 3, the innermost end in spacing space 32 is the high order end in figure, namely the groove bosom in spacing space 32; In theory, positive stop end 221 is inserted in spacing space 32 and contacts with the high order end in spacing space 32 is optimal assembling, and this assembling can prevent that positive stop end 221 from rocking in spacing space 32.But, owing to not reaching ideal state in technique, in addition, also will be for riveted joint process provides certain cushion space, so leave buffering space between positive stop end 221 and the high order end in spacing space 32.
As a kind of preferred, the length in above-mentioned buffering space can be selected 0.3-0.5mm.As shown in Figure 3, this length is the length on left and right directions in figure, in Fig. 3, is that section of space on positive stop end 221 left sides, and length is positive stop end 221 high order ends to the distance of spacing space 32 high order ends.
Above-mentioned length is for for as this type of ting model battery of battery of mobile phone, and in such battery, negative pole brace 2 is less, and the buffer gap needing is shorter; In the time of in being used in isostructural large-sized battery, because negative pole brace 2 is larger, it is large that operation time error also becomes unavoidably, and the buffer gap needing is so just more, and the length of buffer gap will increase.
In actual production, the meeting of the rear end perk of negative pole brace 2 riveted joint is larger, and deformation angle can be at 3 °-5 °.But, in the lithium ion battery that the utility model provides, because adopted limiting section 31, the large 0.05-0.2mm of thickness of the aspect ratio positive stop end 221 in spacing space 32.So during riveted joint, the perk of positive stop end 221 is at most 0.2mm, the inner limited perk in spacing space 32, can reduce deformation angle to a certain extent, reduces the perk height of positive stop end 221.Certainly, if the large 0.05mm of thickness of the aspect ratio positive stop end 221 in spacing space 32, the space up and down of saving so can be more.
The utility model also provides a kind of lithium ion battery in addition, comprises the cover plate assembly that shell, pole piece in the enclosure of parcel and electrolyte and can are used, in this lithium ion battery, and the cover plate assembly that the cover plate assembly of employing provides for the utility model.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (6)
1. the cover plate assembly of a lithium ion battery, comprise cover plate main body (1), negative pole brace (2), insulating trip (3) and the rivet (4) that three is linked together, described insulating trip (3) overlaps between cover plate main body (1) and negative pole brace (2), described negative pole brace (2) comprises caulking part (21) and lug connecting portion (22) for being connected with negative electrode lug, described caulking part (21) links together by rivet (4) and insulating trip (3), described lug connecting portion (22) is positioned at the upper one end relative with caulking part (21) of negative pole brace (2), it is characterized in that, described insulating trip (3) one end corresponding with described lug connecting portion (22) is provided with limiting section (31), between the lower surface of described limiting section (31) and insulating trip (3), be formed with spacing space (32), described lug connecting portion (22) comprises the positive stop end (221) that is positioned at lug connecting portion (22) top, described positive stop end (221) is inserted in described spacing space (32), the width of described limiting section (31) is greater than the width of positive stop end (221).
2. the cover plate assembly of lithium ion battery as claimed in claim 1, is characterized in that, described spacing space (32) is the U-shaped cavity of opening to the right.
3. the cover plate assembly of lithium ion battery as claimed in claim 1, is characterized in that, described insulating trip (3) is provided with near one end of rivet (4) the lateral wall (33) of outwards digging, and described negative pole brace (2) is arranged on the inside of described lateral wall (33).
4. the cover plate assembly of lithium ion battery as claimed in claim 1, is characterized in that, described limiting section (31) forms for insulating trip (3) the downward flange in one end corresponding with lug connecting portion (22).
5. the cover plate assembly of lithium ion battery as claimed in claim 1, is characterized in that, the large 0.05-0.2mm of thickness of the aspect ratio positive stop end (221) in described spacing space (32).
6. a lithium ion battery, comprise shell, wrap up pole piece and electrolyte in the enclosure and the cover plate assembly that seals described shell, it is characterized in that, described cover plate assembly is that claim 1 is to the cover plate assembly of the lithium ion battery described in claim 5 any one.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320517777.6U CN203481288U (en) | 2013-08-23 | 2013-08-23 | Lithium ion battery and cover plate module thereof |
| EP14837530.6A EP3008765B1 (en) | 2013-08-23 | 2014-08-22 | Battery cover plate assembly and battery having the same |
| PCT/CN2014/085062 WO2015024531A1 (en) | 2013-08-23 | 2014-08-22 | Battery cover plate assembly and battery having the same |
| US15/013,831 US10115939B2 (en) | 2013-08-23 | 2016-02-02 | Battery cover plate assembly and battery having the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320517777.6U CN203481288U (en) | 2013-08-23 | 2013-08-23 | Lithium ion battery and cover plate module thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203481288U true CN203481288U (en) | 2014-03-12 |
Family
ID=50229557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320517777.6U Expired - Lifetime CN203481288U (en) | 2013-08-23 | 2013-08-23 | Lithium ion battery and cover plate module thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203481288U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015024531A1 (en) * | 2013-08-23 | 2015-02-26 | Byd Company Limited | Battery cover plate assembly and battery having the same |
| CN110326124A (en) * | 2017-02-27 | 2019-10-11 | 三洋电机株式会社 | Rectangular secondary cell |
| CN112247437A (en) * | 2020-01-20 | 2021-01-22 | 蜂巢能源科技有限公司 | Clamp for welding battery cell and method for welding battery cell |
-
2013
- 2013-08-23 CN CN201320517777.6U patent/CN203481288U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015024531A1 (en) * | 2013-08-23 | 2015-02-26 | Byd Company Limited | Battery cover plate assembly and battery having the same |
| US10115939B2 (en) | 2013-08-23 | 2018-10-30 | Byd Company Limited | Battery cover plate assembly and battery having the same |
| CN110326124A (en) * | 2017-02-27 | 2019-10-11 | 三洋电机株式会社 | Rectangular secondary cell |
| CN110326124B (en) * | 2017-02-27 | 2022-04-22 | 三洋电机株式会社 | Square secondary battery |
| CN112247437A (en) * | 2020-01-20 | 2021-01-22 | 蜂巢能源科技有限公司 | Clamp for welding battery cell and method for welding battery cell |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10243190B2 (en) | Battery spacer, electric core protection assembly and power battery | |
| KR101686279B1 (en) | Secondary battery | |
| CN204144386U (en) | A kind of electrokinetic cell | |
| US20170279091A1 (en) | Secondary battery head cover assembly, secondary battery including the same and assembling method thereof | |
| JP5323786B2 (en) | Secondary battery | |
| KR20140094020A (en) | Electric connector and battery comprising the same | |
| CN203481288U (en) | Lithium ion battery and cover plate module thereof | |
| CN203481289U (en) | Lithium ion battery and cover plate module thereof | |
| WO2022228091A1 (en) | Lithium battery and preparation method therefor | |
| CN203574017U (en) | Cover plate component of lithium ion battery and lithium ion battery | |
| JP2017157342A (en) | Power storage element | |
| JP3229363U (en) | One-sided welded flexible connection sheet with pole | |
| CN203085698U (en) | Lithium-ion battery | |
| JP2017157355A (en) | Electricity storage element | |
| US10700314B2 (en) | Secondary battery head cover assembly, secondary battery including the same and assembling method thereof | |
| KR102226515B1 (en) | Electrode assembly and secondary battery having the same | |
| US10115939B2 (en) | Battery cover plate assembly and battery having the same | |
| CN209626308U (en) | A kind of battery | |
| CN209658289U (en) | Secondary cell and battery modules | |
| CN203850371U (en) | Micro polymer lithium ion square battery | |
| CN207765557U (en) | Serondary lithium battery | |
| CN220341338U (en) | Battery case and lithium ion battery | |
| CN105336900A (en) | Battery space ring, cell protection component and power battery | |
| CN205194775U (en) | Cylinder battery negative pole post and negative pole keysets subassembly and cylinder battery | |
| CN220672700U (en) | Non-cover plate battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
|
| CX01 | Expiry of patent term |