CN104134766A - Lithium battery, electrical core retainer and cover plate thereof, and welding method for cover plate and shell of lithium battery - Google Patents
Lithium battery, electrical core retainer and cover plate thereof, and welding method for cover plate and shell of lithium battery Download PDFInfo
- Publication number
- CN104134766A CN104134766A CN201310212446.6A CN201310212446A CN104134766A CN 104134766 A CN104134766 A CN 104134766A CN 201310212446 A CN201310212446 A CN 201310212446A CN 104134766 A CN104134766 A CN 104134766A
- Authority
- CN
- China
- Prior art keywords
- cover plate
- core retainer
- battery core
- housing
- retainer
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
-
- 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 relates to a lithium battery, an electrical core retainer and a cover plate thereof, and a welding method for the cover plate and a shell of the lithium battery. The lithium battery comprises the electrical core retainer, the shell and the cover plate, wherein the shell and the cover plate are fixedly connected through welding, a cover plate positioning structure used for positioning the electrical core retainer at a set position on the cover plate and maintaining the positioning relation of the electrical core retainer and the cover plate is arranged between the electrical core retainer and the cover plate, and a retainer positioning structure used for positioning and assembling the electrical core retainer at a set position in the shell is arranged between the electrical core retainer and the shell. During welding, the cover plate and the electrical core retainer are positioned at first, then the electrical core retainer is positioned in the shell, and positioning of the cover plate and the shell is realized eventually; thus, with such a structure and a corresponding welding method, accurate positioning of the cover plate and the shell can be guaranteed, and welding quality is ensured.
Description
Technical field
The present invention relates to the welding method of lithium battery, its battery core retainer and cover plate and cover plate and housing.
Background technology
In fields such as electric motor car, communication power supply, energy storage, electronics, lithium battery applications is extensive.For example application number is 201220449119.3, Granted publication number is for the disclosed battery core retainer of Chinese patent of CN 202772208 U and use the lithium-ion-power cell of this battery core retainer, lithium-ion-power cell comprises housing and cover plate, battery core is housed in housing, cover plate is provided with pole, has interval and use lug conduction to be connected between battery core and pole; Battery core retainer is provided with for the perforation of lug outlet side lug, limited by the syndeton of lug and battery core and pole, battery core retainer height is generally much larger than the thickness of cover plate, it is embedded the position near opening at housing, bottom and top respectively with battery core and cover plate top press contacts, thereby rely on cover plate and battery core retainer along top and bottom direction, to carry out spacing to battery core, prevent that battery core from affecting the flash-over characteristic of battery or causing lug and cover plate junction is torn along packing direction play in housing, cause lug contact generation short circuit with metal shell.
In the production process of lithium-ion-power cell, between cover plate and housing, also need to be connected, current a kind of mode that is connected is to adopt Laser Welding welding to be connected, Laser Welding has advantages of that positioning precision is high, speed of welding is fast, welding quality is good, but in order to guarantee Laser Welding Quality, need accurate location between cover plate and housing, once there is dislocation slightly in cover plate and housing, Laser Welding welding quality will be had a strong impact on, and causes solder skip or solder joint inhomogeneous etc.But, during prior art welding, battery core, battery core retainer are to be assembled in housing successively, then by cover plate and housing welding, due to the design accuracy of battery core retainer and the impact of foozle, and the support of lug to cover plate, cover plate is difficult to accurately locate with housing, and because the thickness of cover plate is generally thinner, is difficult for being on the cover board provided for keeping with housing the location structure of location, therefore the positioning precision of cover plate and housing is difficult to guarantee, thereby has influence on welding quality when welding.
Summary of the invention
The welding method that the object of this invention is to provide a kind of lithium battery cover plate and housing, can guarantee the accurate location of cover plate and housing, guarantees welding quality, and a kind of battery core retainer and cover plate are provided simultaneously, and the lithium battery that uses this welding method to manufacture.
The technical scheme that in the present invention, the welding method of lithium battery cover plate and housing adopts is: the welding method of lithium battery cover plate and housing, comprise the following steps: the first step, rely between cover plate and battery core retainer the corresponding positioning structure of cover plate arranging by cover plate orientation assemble in the desired location at battery core retainer top, and by by cover plate and the fixing as a whole positioning relation that keeps both of battery core retainer; Second step, rely on retainer location structure between battery core retainer and housing by battery core retainer orientation assemble the desired location in housing, make simultaneously with the fixing as a whole cover plate of battery core retainer in housing orientation assemble to desired location; The 3rd step, is connected housing and the welding of oriented cover plate.
Described positioning structure of cover plate is buckle connecting structure.
The technical scheme that in the present invention, lithium battery adopts is: lithium battery, comprise battery core retainer, the housing being fixedly connected by welding and cover plate, between described battery core retainer and cover plate, be provided with for by desired location on the cover board of battery core retainer location and keep the positioning structure of cover plate of both positioning relations; Between described battery core retainer and described housing, be provided with the retainer location structure for the desired location in housing by battery core retainer orientation assemble.
Described positioning structure of cover plate is buckle connecting structure, comprise the grab and the clamping hook seat that are mutually clasped, described battery core retainer is provided with the lug being surrounded by corresponding sidewall and bores a hole, and described grab is arranged on the sidewall of described lug perforation, and described clamping hook seat is corresponding setting on the cover board.
The perforation of described lug is provided with arranged side by side more than two, along the sidewall corresponding to orientation arranged side by side of lug perforation, is provided with for being communicated with the die cavity through hole of each lug perforation.
The technical scheme that in the present invention, battery core retainer adopts is: battery core retainer, described battery core retainer is provided with for making battery core retainer be positioned at the retainer location structure in the housing of corresponding lithium battery by desired location, is also provided with for making battery core retainer be positioned on the cover plate of corresponding lithium battery by desired location and keeping the positioning structure of cover plate of both positioning relations on described battery core retainer.
Described battery core retainer is provided with the lug being surrounded by corresponding sidewall and bores a hole, and described positioning structure of cover plate is buckle connecting structure, comprise on the sidewall that is arranged on the perforation of described lug for corresponding cover plate on the grab that is mutually clasped of clamping hook seat.
The technical scheme that cover plate in the present invention in lithium battery adopts is, the cover plate in lithium battery, described cover plate be provided with for battery core retainer by the position relationship orientation assemble of setting and keep the positioning structure of cover plate of positioning relation.
Described positioning structure of cover plate is buckle connecting structure, comprise set firmly on the cover board for corresponding battery core retainer on the clamping hook seat that is mutually clasped of grab.
The present invention adopts technique scheme, and by the positioning structure of cover plate between battery core retainer and cover plate, cover plate can keep location and link together into as a whole by the position relationship of setting with battery core retainer, by the retainer location structure between battery core retainer and housing, battery core retainer can keep location by the position relationship of setting with housing, because the height of battery core retainer is greater than the thickness of cover plate, on battery core retainer, have for the larger cooperation area with housing cooperation, be convenient to be provided for keeping with housing the retainer location structure of location, thereby make battery core retainer and housing good location and keep positioning relation, again because cover plate is to keep location with battery core retainer, so cover plate can keep accurately location by battery core retainer and housing, thereby be conducive to guarantee the welding quality of cover plate and housing.
Accompanying drawing explanation
Fig. 1: battery core retainer and the cover plate schematic diagram after being connected in the lithium battery in the present invention;
The front view of Fig. 2: Fig. 1;
The upward view of Fig. 3: Fig. 1;
Fig. 4: the clamping hook seat structural representation on cover plate;
Fig. 5: the C-C cutaway view in Fig. 4;
Fig. 6: the structural representation of battery core retainer in Fig. 1;
The vertical view of Fig. 7: Fig. 6;
B-B cutaway view of Fig. 8: Fig. 7;
The left view of Fig. 9: Fig. 6;
Figure 10: the partial enlarged drawing of A place grab in Fig. 8.
The name that in figure, each Reference numeral is corresponding is called: 1 battery core retainer, 2 lug perforation, 3 surrounding sidewalls, 4 grabs, 5 lead-in chamfered, 6 buckle faces, 7 die cavity through holes, 8 cover plates, 9 die cavities, 10 clamping hook seats.
Embodiment
As shown in Fig. 1-Figure 10, battery core retainer 1 and the cover plate 8 in an embodiment of lithium battery in the present invention, this lithium battery also comprises housing and battery core (not shown), battery core is seated in housing, and battery core top and case top opening leave the distance of setting, and cover plate 8 is for the open top of casing.
For preventing battery core play in housing, between battery core and cover plate 8, support and be provided with battery core retainer 1, this battery core retainer 1 is as shown in Fig. 6-Figure 10, be provided with two lug perforation 2 that surrounded by surrounding sidewall 3, each surrounding sidewall 3 is all that the both sides of two lugs perforation 2 length directions along battery core retainer 1 are respectively equipped with between die cavity 9 and two lugs perforation 2 and are also provided with die cavity 9 along the extending axially of lug perforation 2.During use, battery core retainer 1 relies on the respective inner surfaces interference fit of retainer location structure that the outer surface of surrounding sidewall forms and housing and is embedded in housing, relative with housing fixing, lug is bored a hole that 2 bottoms penetrate and is connected with pole conduction corresponding cover plate 8 from corresponding lug.
On battery core retainer 1 He on cover plate 8, be respectively equipped with corresponding buckle connecting structure, for both being fixedly connected with so that cover plate 8 remains on the welding position of setting, buckle connecting structure comprises grab 4 and the clamping hook seat 10 being mutually clasped, grab 4 is arranged on the surrounding sidewall 3 of lug perforation 2, clamping hook seat 10 is that correspondence is arranged on cover plate 8, it is a kind of habitual method of attachment that buckle connects, connect reliable, easy to use, and can adopt various ways, in the present embodiment, adopt as Fig. 7, form shown in Fig. 8 and Figure 10, grab 4 has lead-in chamfered 5 and has the buckle face 6 vertical with the wall of surrounding sidewall 3, corresponding clamping hook seat 10 is when grab 4 motion, inclined-plane 5 can guide clamping hook seat 10 to move downward, and top is pressed corresponding sidewall 3 to make it distortion and passes through smoothly for clamping hook seat 10, after the final motion of clamping hook seat 10 puts in place, corresponding sidewall 3 recovers distortion, buckle face 6 is coordinated along top and bottom direction block with the bottom land on clamping hook seat 10, 4 of grabs enter corresponding dodging in space on clamping hook seat 10, make together with cover plate 8 firmly fixes with battery core retainer 1.
The die cavity through hole 7 that is provided with along its length the sidewall that runs through each die cavity and two lugs perforation 2 on battery core retainer 1, has guaranteed that the gas that battery in use produced can communicate with one another, and prevents too high the produced danger of Local Shape chamber internal gas pressure.
Battery core retainer and cover plate in the embodiment that in the present invention, the cover plate of battery core retainer and lithium battery embodiment is above-mentioned lithium battery, the welding method of lithium battery cover plate and housing welding method that embodiment is cover plate and the housing of above-mentioned lithium battery in the present invention, the first step, between dependence cover plate 8 and battery core retainer 1, the corresponding buckle connecting structure arranging, by cover plate orientation assemble in the desired location at battery core retainer top, is fixed the as a whole positioning relation that keeps both by cover plate and battery core retainer; Second step, rely on retainer location structure between battery core retainer 1 and housing 8 by battery core retainer 1 orientation assemble the desired location in housing, make simultaneously with battery core retainer 1 fix as a whole cover plate 8 in housing orientation assemble to desired location; The 3rd step, adopts Laser Welding welding to be connected housing and oriented cover plate.
In the above-described embodiments, retainer location structure is outer surface corresponding with the inner surface of housing on battery core retainer 1, in other embodiments, retainer location structure also can replace to other forms, bonding mating surface is for example set, will behind battery core retainer location, by bonding mating surface, be bonded in housing.In addition, in above-described embodiment, for the fixed connection structure that battery core retainer 1 is fixedly connected with cover plate 8, be buckle connecting structure, and the grab 4 of buckle connecting structure is arranged on battery core retainer 1, clamping hook seat 10 is arranged on cover plate 8, in other embodiments of the invention, fixed connection structure also can replace to other forms, for example on battery core retainer 1, pin-and-hole is set, corresponding bearing pin is set on cover plate 8, and make bearing pin and pin-and-hole interference fit, cover plate 8 can be connected and fixed by pin, and buckle connecting structure in above-described embodiment also can replace to other forms, for example clamping hook seat 10 is arranged on battery core retainer 1, grab 4 is arranged on cover plate 8, the form of the corresponding clamping hook seat 10 of grab 4 also can replace to other forms in bayonet connection field.In addition, what the welding of above-described embodiment cover plate 8 and battery core retainer 1 adopted is Laser Welding, also can adopt other welding manners in other embodiments.
Claims (9)
1. the welding method of lithium battery cover plate and housing, it is characterized in that this welding method comprises the following steps: the first step, rely between cover plate and battery core retainer the corresponding positioning structure of cover plate arranging by cover plate orientation assemble in the desired location at battery core retainer top, and by by cover plate and the fixing as a whole positioning relation that keeps both of battery core retainer; Second step, rely on retainer location structure between battery core retainer and housing by battery core retainer orientation assemble the desired location in housing, make simultaneously with the fixing as a whole cover plate of battery core retainer in housing orientation assemble to desired location; The 3rd step, is connected housing and the welding of oriented cover plate.
2. the welding method of lithium battery cover plate according to claim 1 and housing, is characterized in that: described positioning structure of cover plate is buckle connecting structure.
3. lithium battery, comprise battery core retainer, the housing being fixedly connected by welding and cover plate, it is characterized in that: between described battery core retainer and cover plate, be provided with for by desired location on the cover board of battery core retainer location and keep the positioning structure of cover plate of both positioning relations; Between described battery core retainer and described housing, be provided with the retainer location structure for the desired location in housing by battery core retainer orientation assemble.
4. lithium battery according to claim 3, it is characterized in that: described positioning structure of cover plate is buckle connecting structure, comprise the grab and the clamping hook seat that are mutually clasped, described battery core retainer is provided with the lug being surrounded by corresponding sidewall and bores a hole, described grab is arranged on the sidewall of described lug perforation, and described clamping hook seat is corresponding setting on the cover board.
5. lithium battery according to claim 4, is characterized in that: described lug perforation is provided with arranged side by side more than two, along the sidewall corresponding to orientation arranged side by side of lug perforation, is provided with for being communicated with the die cavity through hole of each lug perforation.
6. battery core retainer, it is characterized in that: described battery core retainer is provided with for making battery core retainer be positioned at the retainer location structure in the housing of corresponding lithium battery by desired location, on described battery core retainer, be also provided with for making battery core retainer be positioned on the cover plate of corresponding lithium battery by desired location and keeping the positioning structure of cover plate of both positioning relations.
7. battery core retainer according to claim 6, it is characterized in that: described battery core retainer is provided with the lug being surrounded by corresponding sidewall and bores a hole, described positioning structure of cover plate is buckle connecting structure, comprise on the sidewall that is arranged on the perforation of described lug for corresponding cover plate on the grab that is mutually clasped of clamping hook seat.
8. the cover plate in lithium battery, is characterized in that: described cover plate be provided with for battery core retainer by the position relationship orientation assemble of setting and keep the positioning structure of cover plate of positioning relation.
9. the cover plate in lithium battery according to claim 8, is characterized in that: described positioning structure of cover plate is buckle connecting structure, comprise set firmly on the cover board for corresponding battery core retainer on the clamping hook seat that is mutually clasped of grab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310212446.6A CN104134766A (en) | 2013-05-31 | 2013-05-31 | Lithium battery, electrical core retainer and cover plate thereof, and welding method for cover plate and shell of lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310212446.6A CN104134766A (en) | 2013-05-31 | 2013-05-31 | Lithium battery, electrical core retainer and cover plate thereof, and welding method for cover plate and shell of lithium battery |
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| Publication Number | Publication Date |
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| CN104134766A true CN104134766A (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310212446.6A Pending CN104134766A (en) | 2013-05-31 | 2013-05-31 | Lithium battery, electrical core retainer and cover plate thereof, and welding method for cover plate and shell of lithium battery |
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| CN (1) | CN104134766A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789500A (en) * | 2014-12-23 | 2016-07-20 | 比亚迪股份有限公司 | Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle |
| CN106384836A (en) * | 2015-11-19 | 2017-02-08 | 广东鸿宝科技有限公司 | Automatic adhesive-applying and automatic retainer-buckling apparatus for power battery |
| CN107425206A (en) * | 2016-05-23 | 2017-12-01 | 惠州市鼎合智能装备有限公司 | Battery holder buckling device and battery core enter shell preprocessing system |
| CN114614207A (en) * | 2022-03-28 | 2022-06-10 | 上海兰钧新能源科技有限公司 | Lithium battery packaging method and lithium battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105789500A (en) * | 2014-12-23 | 2016-07-20 | 比亚迪股份有限公司 | Battery housing and manufacturing method thereof, battery, battery bank, battery pack and electric vehicle |
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| CN114614207A (en) * | 2022-03-28 | 2022-06-10 | 上海兰钧新能源科技有限公司 | Lithium battery packaging method and lithium battery |
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Application publication date: 20141105 |
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