CN102437308B - Lithium battery - Google Patents
Lithium battery Download PDFInfo
- Publication number
- CN102437308B CN102437308B CN2011103951804A CN201110395180A CN102437308B CN 102437308 B CN102437308 B CN 102437308B CN 2011103951804 A CN2011103951804 A CN 2011103951804A CN 201110395180 A CN201110395180 A CN 201110395180A CN 102437308 B CN102437308 B CN 102437308B
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- China
- Prior art keywords
- battery
- lug
- core cap
- insulating part
- battery core
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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
Abstract
The invention discloses a lithium battery, which comprises a battery case, a battery core structure, a battery core cover, a tab structure, electrolyte and conductive terminals. The lithium battery further comprises two layers of insulation structures which comprise a first insulator and a second insulator, wherein the first insulator is arranged at the battery core cover; and the second insulator is arranged at the tab structure. Compared with the prior art, the lithium battery has good insulation effects, and is space-saving.
Description
Technical field
The present invention relates to a kind of battery structure, relate in particular to a kind of lithium ion battery.
Background technology
Generally speaking, battery can be divided into two kinds of column type and squares according to the shape of battery, the composition of battery then comprises battery container (housing of battery outside), battery core cap, and the battery structure of inside; The battery structure is inserted in the battery container, again with battery core cap and battery container with mode driving fits such as welding after, inject the electrolyte at last in the battery, namely finish the main manufacturing process of battery.
The battery structure mainly is made of materials such as positive pole, negative pole, barrier films, and is full of electrolyte usually between battery and battery structure.Positive electrode determines the kind of battery usually, for example lithium cobalt battery (LiCoO2), lithium-manganese cell (LiMnO2), lithium nickel-based battery (LiNiO2) and iron lithium phosphate battery (LiFePO4) etc., can be generally called lithium ion battery, still have other kind certainly, as ni-mh, nickel-cadmium cell etc.Usually, the shape of battery relates to processing procedure and the design of battery structure, cylinder battery for example, and its battery structure is generally coiling body, and square battery, its battery structure is generally the lamination body.
The processing procedure of lamination body generally comprises Z font laminated layer method, and this method please refer within No. 101485033 announcements of Chinese patent CN to be held; Barrier film bag method, this method please refer within No. 101174681 announcements of Chinese patent CN to be held; Barrier film microtomy, this method please refer within No. 101405911 announcements of Chinese patent CN to be held.Be example with the laminated layer method, just/negative pole be by just/after negative material is coated pole piece, add lug in order to electricity is derived, at last again with barrier film just separating/negative pole forms, and so then avoids short circuit.If anodal lug with negative pole is all same direction, then the battery core cap of battery must be done corresponding design, lead-out terminal is made in battery covers.Because lead-out terminal is all at homonymy, and can be made in battery usually and covers, therefore, designs such as the insulation of battery core cap, connected mode just seem quite important.Good insulating Design can be avoided internal short-circuit of battery; Good connected mode can take full advantage of the space of battery container inside, has characteristics such as firm anti-collision again.
Yet the design of existing square battery has several blind spots.
At first, the fixed form of the battery core cap splicing ear of square battery is normally utilized screw and directly the lug of lamination body is locked in battery and covers, and specifically please refer to Chinese patent and holds within disclosing for CN101174681 number; Or utilize rivet directly the lug riveting of lamination body to be covered in battery.Yet in the occasion of various practical applications, the mode of above-mentioned physical fixation is loosening easily, so cause the generation of leakage situation most probably.In addition, the lug of each pole piece also is to connect with physics mode in the lamination body, and the contact internal resistance is bigger, and unit is milliohm, and the lamination body lug that is generally ultrasonic bonding contacts several times of internal resistance.
Secondly, touch the battery core cap and cause the possibility of short circuit for fear of the lug of inside, must do extra insulating Design again, so increased the volume of battery integral body.
Summary of the invention
The object of the present invention is to provide a kind of lithium battery, this lithium battery has preferable insulation effect and saves the space.
Concrete technical scheme is as follows: a kind of lithium battery, comprise battery case, battery structure, battery core cap, extreme ear structure, electrolyte and conducting terminal, described lithium battery also comprises two-layer at least insulation system, this two-layer at least insulation system comprises first insulating part and second insulating part, described first insulating part is installed on the battery core cap, and described second insulating part is installed on extreme ear structure.
Further, the cross sectional shape of described first insulating part is I shape.
Further, described second insulating part is laminated structure.
Further, described battery covers to offer covers the hole, and described first insulating part is attached at and covers the hole inwall.
Further, described first insulating part partly is covered in described battery core cap two-phase opposite.
Further, described first insulating part is integrated injection molding.
Further, described second insulating part is provided with opening and wears and mistake for extreme ear structure.
Further, described extreme ear structure comprises the cell core lug that is connected with the battery structure and the battery core cap lug that is connected with the battery core cap, and described second insulating part is installed on described battery core cap lug.
Compared to prior art, the good insulating effect of lithium battery of the present invention and saving space.
Description of drawings
Fig. 1 is the stereogram that battery cap assemblies of the present invention is assembled in battery.
Fig. 2 is the schematic perspective view of battery cap assemblies of the present invention.
Fig. 3 is another schematic perspective view (battery case is omitted) of battery cap assemblies of the present invention.
Fig. 4 is the schematic perspective view at another visual angle of battery cap assemblies of the present invention.
Fig. 5 is partial perspective view's (battery case is omitted) of battery shown in Figure 1.
Fig. 6 is the schematic side view of battery cap assemblies of the present invention.
Fig. 7 is the cell core lug of battery shown in Figure 1 and the schematic diagram before the welding of battery core cap lug.
Fig. 8 be Fig. 6 in conjunction with schematic diagram.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
See also Fig. 1 to shown in Figure 5, battery cap assemblies 300 of the present invention is contained in the battery case 200 of battery 100.Be full of electrolyte in the described battery case 200.Described battery cap assemblies 300 comprises battery core cap (not label) and battery structure 20.Battery core cap of the present invention comprises battery cover plate 30, be arranged on the conducting terminal 10 of battery cover plate 30 1 sides, be arranged on battery core cap lug 41,42, retaining piece 50 and the insulation cushion 70 of battery cover plate 30 opposite sides.
As Fig. 2, shown in Figure 3, described conducting terminal 10 comprises installation portion 12 and extends the junction 11 that is connected for the external equipment (not shown) from installation portion 12.In the present embodiment, described junction 11 be provided with screw thread 111 in order to external equipment screw-threaded coupling, described installation portion 12 is oblong.Be appreciated that there is no particular restriction for the shape of installation portion 12 as long as adapt to the width of battery 100.Described installation portion 12 is provided with the riveted holes that runs through installation portion 12.The cross section of described conducting terminal 10 is step-like.Described conducting terminal 10 comprises positive terminal 10a and negative terminal 10b, and main material is brass.In order to distinguish positive pole and negative pole, can additionally add rete in the brass outside.Described rete is to electroplate on conducting terminal 10, and material is generally nickel or bronze.Described conducting terminal 10 also is called pole as lead-out terminal, and main application is that the electricity with battery structure 20 exports to battery 100 outsides in battery 100, and can lock.
Described conducting terminal 10 is made in the cold stamping mode, comprises the steps:
Long copper bar is cut into charge bar, and described charge bar is long to be the 15-20 millimeter;
Described charge bar is put into cold punching die one end is flattened into round pie, this charge bar of punch die forms in order to being installed to the installation portion 12 on the battery 100, and installation portion 12 is cut into oblong;
Use filature to rub the junction 11 with screw thread 111 at charge bar;
Cleaning step, described cleaning method are that ultrasonic wave cleans; And
Conducting terminal 10 after cleaning forms rete, electroplates different materials respectively according to positive pole or the negative pole of conducting terminal 10.
The torsion of the conducting terminal 10 that comes out with the manufacturing of cold stamping mode is bigger, can reach 10 Ns of Dayton. rice.In the prior art, mainly utilize car to cut the processing and manufacturing conducting terminal, yet it is less to cut the conducting terminal torsion that processing and manufacturing comes out with car, at most to 3 Ns of Dayton. rice namely can be slided tooth.As if described sliding tooth refers to that just beginning to lock screw has locking, but lock dark phenomenon that a bit comes loose again again.Therefore, be not easy to take place sliding tooth more with the produced conducting terminal 10 of cold stamping mode.
Described battery structure 20 comprises lamination body (not label) and cell core lug 21,22, and described cell core lug 21,22 is with battery core cap lug 41,42 machineries and be electrically connected, and detail will be set forth at this paper back segment.Described cell core lug 21,22 comprises anode pole piece lug 21 and cathode pole piece lug 22.Described lamination body is to form by the multi-disc pole piece is stacked, and each pole piece has a lug.Described positive and negative cell core lug 21,22 is welded into one in the mode of ultrasonic bonding by the lug on the multi-disc pole piece respectively and forms.
The material of described battery cover plate 30 can be consistent with battery case 200, such as all can be aluminium.Being shaped as of described battery cover plate 30 is square.Its size design mainly is the openings of sizes of matching battery shell 200, in order to be bonded with each other.Simultaneously, reserving four lid hole (not shown) that run through wears for insulation cushion 70 and retaining piece 50.Described battery cover plate 30 is with battery 100 sealing, and the inner surfaces in four lid holes all coat with insulation cushion 70, again with retaining piece 50, such as rivet etc., passes wherein with riveted joint.
Described battery core cap lug comprises positive battery core cap lug 41 and negative battery core cap lug 42.The material difference of described positive and negative battery core cap lug 41,42, the material of positive battery core cap lug 41 is aluminium, the material of negative battery core cap lug 42 is copper nickel plating.The selection principle of described battery core cap ear pole material is that anode pole piece lug 21 materials need connected positive battery core cap lug 41 material unanimities, and negative pole also together.Described battery core cap lug 41,42 is sheet metal, and its width depends on the size of overcurrent.Electric current is more big, and the width of battery core cap lug 41,42 is more big.For example: the battery core cap lug width of 25 ampere-hours is generally 20 ~ 25 millimeters, and the battery core cap lug width of 16 ampere-hours is generally 15 ~ 20 millimeters, and the battery core cap lug width of 12 ampere-hours is generally 10 ~ 15 millimeters.Described battery core cap lug is riveted on the battery cover plate 30 by rivet 50, is used for and the cell core lug welding, and forms M font extreme ear structure jointly with cell core lug.
Described positive battery core cap lug 41 and anode pole piece lug 21 are connected by ultrasonic bonding.Described negative battery core cap lug 42 and cathode pole piece lug 22 are connected by ultrasonic bonding.Described battery cap assemblies 300 also can further comprise the insulating trip 60 that is arranged between battery structure 20 and the battery cover plate 30.Further be provided with through hole (not label) on the described insulating trip 60, described battery core cap lug 41,42 passes through hole and cell core lug 21,22 machineries of insulating trip 60 and is electrically connected.
See also Fig. 3 to shown in Figure 6, described cell core lug 21,22 comprises that first connecting portion 211,221 that is connected with battery structure 20 lamination bodies reaches first joint portion 212,222 that is connected with battery core cap lug 41,42.Described battery core cap lug 41,42 comprises that second connecting portion 411,421 that is connected with battery cover plate 30 reaches second joint portion 412,422 that is connected and is connected with first joint portion 212,222 with second connecting portion 411,421.Cross section after described anode pole piece lug 21 and positive battery core cap lug 41 machineries and the electric connection is the M font.Cross section after described cathode pole piece lug 22 and negative battery core cap lug 42 machineries and the electric connection roughly is the M font.Adopt the connected mode of this kind M font, then the distance between described battery cover plate 30 and the battery structure 20 is smaller or equal to 10 millimeters, thereby reduces the waste of battery container 200 inner spaces.The connected mode of this kind M font is easy to use ultrasonic bonding, and ultrasonic bonding can reduce the contact internal resistance.In addition, this kind M font extreme ear structure makes that also connection is more firm.
As shown in Figure 2, described retaining piece 50 reaches battery cover plate 30, conducting terminal 10, battery core cap lug 41,42 machineries to link together electrically.In the present embodiment, described retaining piece 50 is rivet, and described conducting terminal 10, battery cover plate 30, battery core cap lug 41,42 and insulation cushion 70 are retained on together by rivet.The material of rivet is mainly aluminium, also can be the material of red metal or other equal performances.Described rivet 50 be shaped as round column, have the head of similar ladder type, be positioned at the below of battery cover plate 30 than major part.Described rivet 50 is of a size of: head width can be 7 ~ 10 millimeters, and thickness can be 0.8 ~ 1.5 millimeter, and bar directly can be 3.5 ~ 5 millimeters, and height is adjusted accordingly according to the size of battery cover plate 30.The hole wall of four riveted holes on conducting terminal 10 installation portions 12 all coats with insulation cushion 70, rivet 50 is passed riveted again.In the present embodiment, utilize riveted joint mode fixed conductive terminals 10, insulation cushion 70, battery cover plate 30 and battery core cap lug 41,42.
Described insulating trip 60 is insulator, and its material can be plastics.Described insulating trip 60 be shaped as a sheet insulator, can be squarely, marks the twice square aperture in the middle of the lamellar body, pass this insulating trip 60 in order to battery core cap lug 41,42.The effect of described insulating trip 60 is to avoid cell core lug 21,22 parts that are connected with battery core cap lug 41,42 to touch battery cover plate 30.
As Fig. 6 and shown in Figure 7, described insulation cushion 70 comprises first insulation division 71 in order to electric insulation conducting terminal 10 and battery cover plate 30 that is positioned at battery cover plate 30 1 sides, be positioned at battery cover plate 30 opposite sides is used for second insulation division 72 of electric insulation battery cover plate 30 and battery core cap lug 41,42 and is positioned at being connected the also connecting portion (not shown) of electric insulation retaining piece 50 and battery cover plate 30 of first insulation division 71 and second insulation division 72.Described first insulation division 71 partly is coated on battery cover plate 30 tops, described second insulation division 72 partly is coated on battery cover plate 30 belows, on the described connecting portion clad battery core cover plate 30 lid hole inwalls, described lid hole is to make rivet 50 can pass battery cover plate 30.The material of described insulation cushion 70 is PP (polypropylene), also can be the material of other insulation and electrolyte resistance corrosion, does not enumerate one by one in this.Described insulation cushion 70 has the I shape section shape.Overlook direction for being square, and four end fillets.Be appreciated that ground, described insulation cushion 70 areas must be bigger than the area of conducting terminal 10 installation portions 12, and also the area than battery core cap lug 41,42 is big, overlooks and also can be other shapes on the direction.The processing method of described insulation cushion 70 is that battery cover plate 30 is inserted injection molding machine earlier, makes the insulation system that cross section is I shape in the mode of ejection formation then.Because conducting terminal 10, battery cover plate 30, cell core lug 21,22 reach battery core cap lug 41,42 and are metal material, so the purposes of described insulation cushion 70 is for avoiding the both positive and negative polarity short circuit.Particularly, described insulation cushion 70 be used for isolating simultaneously battery cover plate 30 and rivet 50, isolate battery cover plate 30 and battery core cap lug 41,42, being electrically connected between isolation battery cover plate 30 and the conducting terminal 10.In the present invention, described insulating trip 60 constitutes double-layer insulating structure with insulation cushion 70, makes that the insulation effect of battery is better.
The manufacture method of described battery cap assemblies 300 may further comprise the steps:
Injection mo(u)lding insulation cushion 70 on battery cover plate 30;
Conducting terminal 10 is provided, conducting terminal 10 is placed battery cover plate 30 1 sides;
Battery core cap lug 41,42 is provided, battery core cap lug 41,42 is placed battery cover plate 30 opposite sides;
Retaining piece 50 is provided, described retaining piece 50 with battery cover plate 30, insulation cushion 70, conducting terminal 10 and battery cover lug 41,42 machinery and electrically fixing link together;
With described battery core cap lug 41,42 and cell core lug 21,22 with the mode machinery of ultrasonic bonding and be electrically connected.
In above step, described conducting terminal 10, battery core cap lug 41,42 and retaining piece 50 all insulate with battery cover plate 30 mutually by insulation cushion 70.Described cell core lug 21,22 machinery and electric connections with battery core cap lug 41,42 are to use the supersonic welding mode that both welding are dissolved in.
As shown in Figure 8, before welding battery core cap lug and the cell core lug, earlier second connecting portion 411,421 with battery core cap lug is riveted on the battery cover plate 30, again the bending of battery core cap lug is made second connecting portion 411,421 with second joint portion 412,422 vertical.Simultaneously, make the connecting portion 211 of winning, 221 and first joint portion 212,222 angle also be 90 degree battery core cap lug also bending, also namely vertical mutually.Then, battery core cap lug is corresponding in twos according to positive and negative electrode with cell core lug.Then, in the supersonic welding mode both are welded in one.At last, make after battery cover plate 30 upset is fixing described cell core lug 21,22 roughly be the M font with cross section after battery core cap lug 41,42 is connected, as shown in Figure 6, also i.e. formation M font lug syndeton at last.
In the present invention, battery cap assemblies 300 uses the fixed form of riveted joint, can avoid producing the loosening phenomenon of similar screw, and can avoid the possibility of battery leakage, and overall structure is simplified.In addition, battery cap assemblies of the present invention avoids the respond well while of short circuit can realize a large amount of productions.In addition, cell core lug 21,22 and battery core cap lug 41,42 adopt connected mode and the recessed M font that is converted into of ultrasonic bonding, thereby can save space and firm welding.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. lithium battery, comprise battery case, the battery structure, the battery core cap, extreme ear structure, electrolyte and conducting terminal, it is characterized in that: also comprise two-layer at least insulation system, this two-layer at least insulation system comprises first insulating part and second insulating part, described first insulating part is installed on the battery core cap, described second insulating part is installed on extreme ear structure, described extreme ear structure comprises the cell core lug that is connected with the battery structure and the battery core cap lug that is connected with the battery core cap, and described cell core lug is the M font with cross section after battery core cap lug is connected.
2. lithium battery as claimed in claim 1, it is characterized in that: the cross sectional shape of described first insulating part is I shape.
3. lithium battery as claimed in claim 2, it is characterized in that: described second insulating part is laminated structure.
4. lithium battery as claimed in claim 1, it is characterized in that: described battery covers to offer covers the hole, and described first insulating part is attached at and covers the hole inwall.
5. lithium battery as claimed in claim 4, it is characterized in that: described first insulating part partly is covered in described battery core cap two-phase opposite.
6. lithium battery as claimed in claim 5, it is characterized in that: described first insulating part is integrated injection molding.
7. lithium battery as claimed in claim 6 is characterized in that: described second insulating part is provided with opening and wears and mistake for extreme ear structure.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103951804A CN102437308B (en) | 2011-12-02 | 2011-12-02 | Lithium battery |
| JP2012012728A JP2013118161A (en) | 2011-12-02 | 2012-01-25 | Battery lid assembly member, battery assembly including battery lid assembly member, and manufacturing method of battery assembly |
| EP12152672.7A EP2600433A1 (en) | 2011-12-02 | 2012-01-26 | Lithium ion battery |
| US13/360,413 US20130143097A1 (en) | 2011-12-02 | 2012-01-27 | Lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103951804A CN102437308B (en) | 2011-12-02 | 2011-12-02 | Lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102437308A CN102437308A (en) | 2012-05-02 |
| CN102437308B true CN102437308B (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103951804A Expired - Fee Related CN102437308B (en) | 2011-12-02 | 2011-12-02 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102437308B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905245A (en) * | 2005-07-29 | 2007-01-31 | 三星Sdi株式会社 | Rechargeable battery |
| CN101826603A (en) * | 2009-03-06 | 2010-09-08 | 深圳市比克电池有限公司 | Battery end cover, shell and battery |
| CN101887959A (en) * | 2010-06-24 | 2010-11-17 | 朝阳立塬新能源有限公司 | Riveted low-internal-resistance energy storage device |
| CN201717331U (en) * | 2010-07-29 | 2011-01-19 | 深圳市东方华联科技有限公司 | Novel lithium ion battery |
| CN102136561A (en) * | 2010-01-26 | 2011-07-27 | Sb锂摩托有限公司 | Rechargeable battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4645001B2 (en) * | 2001-07-11 | 2011-03-09 | 株式会社Ｇｓユアサ | battery |
-
2011
- 2011-12-02 CN CN2011103951804A patent/CN102437308B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905245A (en) * | 2005-07-29 | 2007-01-31 | 三星Sdi株式会社 | Rechargeable battery |
| CN101826603A (en) * | 2009-03-06 | 2010-09-08 | 深圳市比克电池有限公司 | Battery end cover, shell and battery |
| CN102136561A (en) * | 2010-01-26 | 2011-07-27 | Sb锂摩托有限公司 | Rechargeable battery |
| CN101887959A (en) * | 2010-06-24 | 2010-11-17 | 朝阳立塬新能源有限公司 | Riveted low-internal-resistance energy storage device |
| CN201717331U (en) * | 2010-07-29 | 2011-01-19 | 深圳市东方华联科技有限公司 | Novel lithium ion battery |
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| Publication number | Publication date |
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| CN102437308A (en) | 2012-05-02 |
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Owner name: SUZHOU HEJUN NEW ENERGY CO., LTD. Free format text: FORMER NAME: SUZHOU GOLDEN CROWN NEW ENERGY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 215500 Changshou City hi tech Development Hi tech Industrial Park, Suzhou, Guilin Road, No. 9, Jiangsu Patentee after: Suzhou Hejun New Energy Co., Ltd. Patentee after: And Jun (Hongkong) Co., Ltd. green Address before: 215500 Changshou City hi tech Development Hi tech Industrial Park, Suzhou, Guilin Road, No. 9, Jiangsu Patentee before: Suzhou Golden Crown New Energy Co., Ltd. Patentee before: Golden Crown New Energy (Hongkong) Co., Ltd. |
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| 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: 20130703 Termination date: 20191202 |