CN103390768A - Lithium ion battery and packaging technology thereof - Google Patents
Lithium ion battery and packaging technology thereof Download PDFInfo
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- CN103390768A CN103390768A CN2013103113562A CN201310311356A CN103390768A CN 103390768 A CN103390768 A CN 103390768A CN 2013103113562 A CN2013103113562 A CN 2013103113562A CN 201310311356 A CN201310311356 A CN 201310311356A CN 103390768 A CN103390768 A CN 103390768A
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- battery core
- sheet metal
- lithium ion
- ion battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a battery and provides a lithium ion battery. The lithium ion battery comprises a battery cell as well as an upper metal sheet and a lower metal sheet which are used for wrapping the upper surface and the lower surface of the battery cell respectively, wherein the upper metal sheet and the lower metal sheet are respectively provided with a containing slot for holding the battery cell, the inner walls of the two containing slots respectively fit with the battery cell, side edges, which are overlapped with each other, are also arranged between the two metal sheets, and the overlapped part is processed by laser welding. The invention also provides a packaging technology of the lithium ion battery. The lithium ion battery has the advantages that the battery cell is wrapped and positioned by the two metal sheets subjected to laser welding, so that the physical strength of the lithium ion battery is enhanced, the lithium ion battery is positioned accurately, the effective space utilization rate of the lithium ion battery is high, and the capacity of the lithium ion battery can be improved; the appearance of the lithium ion battery is not influenced by laser welding, the packaging technology of the lithium ion battery is simple in whole operation, the dimensional uniformity of manufactured lithium ion batteries is high, and thus the yield of the lithium ion batteries is greatly improved.
Description
Technical field
The present invention relates to battery, relate in particular to a kind of lithium ion battery with and packaging technology.
Background technology
Lithium ion battery is as a kind of modern high performance battery, the current all trades and professions that just are being applied to.The polymer battery core of traditional lithium ion battery adopts aluminum-plastic composite membrane as housing usually, and its intensity is lower, and aluminum-plastic composite membrane also easily occurs damaged.To this when the encapsulation polymer battery core, often at its surface label, be provided with sheet metal, add again the gluing frame in both sides fixing to improve physical strength, but this structure easily causes the space waste, make the reality of battery effectively utilize space to reduce, in the situation that equal volume, the capacity of battery is not high, and also having at present a kind of method for packing is to adhere to aluminium flake on the surface of polymer battery core with double faced adhesive tape, but this method makes the qualification rate of battery low, technique is also more complicated, and operating efficiency is not high.
Summary of the invention
The object of the invention is to overcome the defect of prior art, a kind of reliability is high and the battery space utilance is higher lithium ion battery and the high packaging technology of working (machining) efficiency are provided.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of lithium ion battery is provided, comprise battery core, be respectively used to wrap up in upper sheet metal and the lower sheet metal of establishing described battery core upper and lower surface, described upper sheet metal and described lower sheet metal all have be used to the holding tank of putting described battery core, the inwall of two described container cavities is fitted with described battery core respectively, also have between two described sheet metals described battery core is wrapped up in and established rear overlapped side, and its overlapping adopts laser welding.
Further, add the injection moulding glue-line is arranged between described side and described battery core.
Further, described upper sheet metal or described lower sheet metal are provided be used to the first encapsulating mouth that carries out the described injection moulding glue-line of hot flow path injection moulding.
Particularly, described side is provided be used to the second encapsulating mouth that carries out the described injection moulding glue-line of cold runner injection moulding.
Further, also comprise the glue frame that is located on described battery core side surface, and described glue frame is between two described sheet metal sides and described battery core side surface.
Further, the leading flank of described battery core is installed with front offset plate, and the trailing flank of described battery core is installed with rear offset plate.
Particularly, the leading flank of described battery core also is provided be used to preventing that described battery core from crossing the baffle that discharges and recharges.
Further, also be respectively equipped with adhesive-layer between the upper and lower surface of two described sheet metals and described battery core.
The present invention also provides a kind of packaging technology of lithium ion battery, comprises the following steps:
Making has upper sheet metal and the lower sheet metal of holding tank, and presets the first encapsulating mouth on upper sheet metal or lower sheet metal, makes and is used for wrapping up in the glue frame of establishing the battery core side surface simultaneously;
Battery core is placed in the glue frame, and is folded with baffle between the leading flank of battery core and glue frame, and be preset with hot-fluid Jiao Dao between battery core and glue frame;
The glue frame that is built-in with battery core is placed in one in the holding tank of a sheet metal, then another sheet metal and a sheet metal are wherein covered;
After two metal sheets covered, two metal sheets had the side of coincidence, and the overlapping of opposite side carries out laser welding;
After welding is completed, adopt injection molding machine to carry out the hot-fluid injection moulding to the first encapsulating mouth, hot glue enters hot-fluid Jiao Dao along the encapsulating mouth;
After injection moulding is completed, cooling cleaning.
The side of described upper sheet metal or described lower sheet metal is preset with the second encapsulating mouth, between described battery core and glue frame, is preset with the cold flow Jiao Dao that is communicated with described the second encapsulating mouth, and described injection molding machine carries out the cold flow injection moulding to described the second encapsulating mouth.
The present invention has following technique effect:
In the present invention, the up and down sheet metal all has holding tank, after a holding tank that battery core is placed in one, again another sheet metal is covered battery core, has the side that is superimposed with each other between this two metal sheets simultaneously, this overlapping is adopted laser welding, the up and down two metal sheets adopts the mode of welding to be fixed like this, contrast locating is more accurate, the product size high conformity, the space availability ratio of lithium ion battery is higher, be conducive to promote battery capacity, and adopt laser welding can the outward appearance of battery not to be exerted an influence.Further, the packaging technology of lithium ion battery, adopt the sheet metal of making, laser welding and hot flow path injection moulding after assembling is completed, and whole process operation is fairly simple, effectively guarantees conforming product rate, high efficiency.
Description of drawings
Fig. 1 is that battery core of the present invention side is wrapped up in and established glue frame embodiment explosive view;
Fig. 2 is Fig. 1 structure vertical view;
Fig. 3 be in Fig. 2 A to cutaway view;
Fig. 4 is B place enlarged drawing in Fig. 3;
Fig. 5 is that the present invention adopts front offset plate and rear offset plate embodiment explosive view;
Fig. 6 is Fig. 5 structure vertical view;
Fig. 7 is the end view of Fig. 6;
Fig. 8 be in Fig. 6 C to cutaway view;
Fig. 9 is D place enlarged drawing in Fig. 8.
Embodiment
, in order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
referring to Fig. 1-Fig. 4, the embodiment of the present invention provides a kind of lithium ion battery, comprise battery core 1, upper sheet metal 2 and lower sheet metal 3, upper sheet metal 2 and lower sheet metal 3 are wrapped up in respectively upper surface 11 and the lower surface 12 of establishing battery core 1, and also has respectively a holding tank 4 on upper sheet metal 2 and lower sheet metal 3, battery core 1 is placed in the holding tank 4 of upper sheet metal 2 or lower sheet metal 3, and another sheet metal covers battery core 1 again, make battery core 1 fit with the inwall 41 of two holding tanks 4 respectively, simultaneously after covering another sheet metal, have overlapped upper side edge 21 and lower side 31 between upper sheet metal 2 and lower sheet metal 3, and in overlapping place, adopt laser welding, usually, upper sheet metal 2 and lower sheet metal 3 have respectively upper side edge 21 and the lower side 31 of two pairs of coincidences when covering, and these two pairs of upper side edges 21 are oppositely arranged with lower side 31.Battery core 1 is placed in the holding tank 4 of sheet metal and protects in the present invention; and two metal sheets is for being welded and fixed; can form location preferably to battery core 1; the battery size high conformity; and the effective rate of utilization of battery space is high; can promote the capacity of battery, two metal sheets adopts laser welding simultaneously, and it can not impact the outward appearance of battery.
Further referring to Fig. 1, Fig. 2, Fig. 5, Fig. 6 and Fig. 7, add injection moulding glue-line 5 is arranged between the lower side 21 of the upper side edge 21 of upper sheet metal 2 or lower sheet metal 2 and battery core 1.When the holding tank 4 that battery core 1 is placed in sheet metal 2 or lower sheet metal 3 was interior, there was certain clearance space in battery core 1 with the side of two metal sheets, and at this clearance space filling injection moulding glue-line 5, can form battery core 1 is better located.usually, fill injection moulding glue-line 5 and can take the hot flow path injection moulding between the side of sheet metal and battery core 1, be provided with the first encapsulating mouth 22 at upper sheet metal 2, certainly it also can arrange at lower sheet metal 3, injection molding machine injects the sizing material of molten along the first encapsulating mouth 22, the sizing material of molten is filled in each clearance space further, for the position of the first encapsulating mouth 22 with its be located at battery core 1 upper surface directly over, and nearby position is provided with some exhaust outlets 23, sizing material is discharged the air in clearance space along exhaust outlet 23, can be so that sizing material be filled more substantial, and due to the method that adopts the hot flow path injection moulding, sizing material is in molten condition always in injection moulding process, do not have the mouth of a river to produce, and whole course pressure is always more stable.Certainly injection moulding glue-line 5 can also adopt the method for cold runner injection moulding, because the sizing material cooling of cold runner injection moulding is very fast, so will be located at for the second encapsulating mouth 24 of cold runner injection moulding the upper side edge 21 of upper sheet metal 2, it also can be located at the lower side 31 of lower sheet metal 3, sizing material directly is filled in clearance space between itself and battery core 1, and the production cost of this injection moulding mode is lower.
Referring to Fig. 1, Fig. 4, Fig. 5 and Fig. 9, battery has also comprised a glue frame 6 further.usually, upper sheet metal 2 and lower sheet metal 3 are being wrapped up in while establishing battery core 1, the upper surface 11 of battery core 1, lower surface 12, left surface 13 and right flank 14 are all wrapped up in and are established, and because the leading flank 15 of battery core 1 is provided with electrode, go up sheet metal 2 and descend sheet metal 3 all not wrap up in leading flank 15 and the trailing flank 16 of establishing battery core 1, and in order to strengthen further the protection to battery core 1, be necessary leading flank 15 and the trailing flank 16 of battery core 1 are protected, so each side surface in battery core 1 is equipped with a circle glue frame 6, and glue frame 6 is between upper side edge 21 or lower side 31 and battery core 1, and injection moulding glue-line 5 is between glue frame 6 and battery core 1, so also be conducive to strengthen the physical strength of battery, and this glue frame 6 is easy to processing, be beneficial to very much production.Can certainly only be processed with front offset plate 151 and rear offset plate 161, front offset plate 151 is fixed in the leading flank 15 of battery core 1, and rear offset plate 161 is fixed in the trailing flank 16 of battery core 1, and it also can play the effect of strengthening battery strength.
Refer again to Fig. 1 and Fig. 5, lithium ion battery, as a kind of heavy-duty battery, is all secondary cell mostly, except having discharging function, also have charge function, and should prevent the situation of putting or overcharging when it discharges and recharges, in order to avoid affect the serviceability of battery and use safety.Also should be provided with baffle 7 between battery core 1 leading flank 15 and glue frame 6 or between battery core 1 leading flank 15 and front offset plate 151 in the present invention; lower or charge when saturated at battery capacity; baffle 7 can directly interrupt discharge or charging process, plays the effect of protection battery.
Particularly, also should be provided with adhesive-layer 8 between two surfaces up and down of battery core 1 and upper sheet metal 2 and lower sheet metal 3, both can play the fixedly effect of battery core 1 and two metal sheets, can also prevent from having clearance space between the upper and lower surface of two metal sheets and battery core 1.
Refer again to Fig. 1-Fig. 4, the present invention also provides a kind of packaging technology of lithium ion battery, is used for above-mentioned lithium ion battery encapsulation is comprised following operating procedure particularly:
At first make upper sheet metal 2, lower sheet metal 3 and glue frame 6, and when moulding, upper sheet metal 2 and lower sheet metal 3 all should have holding tank 4, therein default the first encapsulating mouth 22 and a plurality of steam vent 23 on a sheet metal;
Further, get a battery core 1, be placed in glue frame 6, should be provided with baffle 7 between certain leading flank 15 in battery core 1 and glue frame 6, between also is preset with hot-fluid glue road (not shown) simultaneously;
Further, glue frame 6 and battery core 1 integral body are placed in one in the holding tank 4 of a sheet metal, then above another sheet metal cover is combined in, certainly are equipped with adhesive-layer 8 between the upper and lower surface of two metal sheets and battery core 1, be generally double faced adhesive tape;
Further, after two metal sheets covered, two sides of two metal sheets overlapped, and the overlapping position of opposite side is carried out laser welding, thereby makes integral body of two metal sheets connection bit, played the effect of strengthening physical strength and location battery core 1;
Further, after welding is completed, adopt injection molding machine to carry out the hot-fluid injection moulding to the first encapsulating mouth 22, the sizing material of molten enters in hot-fluid glue road along the first encapsulating mouth 22, and sizing material is discharged the air of inside by each exhaust outlet 23 simultaneously;
After last injection moulding was completed, cool batteries was also cleared up its outer surface.
Whole encapsulation process is very simple, and adopts the battery size size after this packaging technology processing basically identical, and the qualification rate of product is very high.
Referring to Fig. 5-Fig. 9, for the course of processing, can also be provided with the second encapsulating mouth 24 at upper metal 2 upper side edges 21, this encapsulating mouth also can be located at lower sheet metal 3 lower sides 31, and between glue frame 6 and battery core 1 default cold flow glue road (not shown), carry out the cold flow injection moulding by the second encapsulating mouth 24 again, can cut down finished cost.And for the glue frame 6 in the course of processing, can adopt the front offset plate 151 of making and rear offset plate 161 to replace; and it is separately fixed at leading flank 15 and the trailing flank 16 of battery core 1; and also should be provided with baffle 7 between the leading flank 15 of front offset plate 151 and battery core 1, then will be fixed with front offset plate 151 and rear offset plate 161 and be placed in one in the holding tank 4 of a sheet metal.
The foregoing is only preferred embodiment of the present invention, its structure is not limited to the above-mentioned shape of enumerating, and all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. lithium ion battery, comprise battery core, be respectively used to wrap up in upper sheet metal and the lower sheet metal of establishing described battery core upper and lower surface, it is characterized in that: described upper sheet metal and described lower sheet metal all have be used to the holding tank of putting described battery core, the inwall of two described container cavities is fitted with described battery core respectively, also have between two described sheet metals described battery core is wrapped up in and established rear overlapped side, and its overlapping adopts laser welding.
2. lithium ion battery as claimed in claim 1, is characterized in that: add the injection moulding glue-line is arranged between described side and described battery core.
3. lithium ion battery as claimed in claim 2, it is characterized in that: described upper sheet metal or described lower sheet metal are provided be used to the first encapsulating mouth that carries out the described injection moulding glue-line of hot flow path injection moulding.
4. lithium ion battery as claimed in claim 2, it is characterized in that: described side is provided be used to the second encapsulating mouth that carries out the described injection moulding glue-line of cold runner injection moulding.
5. lithium ion battery as claimed in claim 1, is characterized in that: also comprise the glue frame that is located on described battery core side surface, and described glue frame is between two described sheet metal sides and described battery core side surface.
6. lithium ion battery as claimed in claim 1, it is characterized in that: the leading flank of described battery core is installed with front offset plate, and the trailing flank of described battery core is installed with rear offset plate.
7., as the described lithium ion battery of claim 1-6 any one, it is characterized in that: the leading flank of described battery core also is provided be used to preventing that described battery core from crossing the baffle that discharges and recharges.
8. lithium ion battery as claimed in claim 1, is characterized in that: also be respectively equipped with adhesive-layer between the upper and lower surface of two described sheet metals and described battery core.
9. the packaging technology of a lithium ion battery is characterized in that: comprise the following steps:
Making has upper sheet metal and the lower sheet metal of holding tank, and presets the first encapsulating mouth on upper sheet metal or lower sheet metal, makes and is used for wrapping up in the glue frame of establishing the battery core side surface simultaneously;
Battery core is placed in the glue frame, and is folded with baffle between the leading flank of battery core and glue frame, and be preset with hot-fluid Jiao Dao between battery core and glue frame;
The glue frame that is built-in with battery core is placed in one in the holding tank of a sheet metal, then another sheet metal and a sheet metal are wherein covered;
After two metal sheets covered, two metal sheets had the side of coincidence, and the overlapping of opposite side carries out laser welding;
After welding is completed, adopt injection molding machine to carry out the hot-fluid injection moulding to the first encapsulating mouth, hot glue enters hot-fluid Jiao Dao along the encapsulating mouth;
After injection moulding is completed, cooling cleaning.
10. lithium ion battery packaging technology as claimed in claim 9, it is characterized in that: the side of described upper sheet metal or described lower sheet metal is preset with the second encapsulating mouth, be preset with between described battery core and glue frame the cold flow Jiao Dao that is communicated with described the second encapsulating mouth, described injection molding machine carries out the cold flow injection moulding to described the second encapsulating mouth.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310311356.2A CN103390768B (en) | 2013-07-23 | 2013-07-23 | Packaging technology for lithium ion battery |
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| CN201310311356.2A CN103390768B (en) | 2013-07-23 | 2013-07-23 | Packaging technology for lithium ion battery |
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| CN103390768B CN103390768B (en) | 2015-04-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104241555A (en) * | 2014-06-27 | 2014-12-24 | 惠州市德赛电池有限公司 | Lithium battery encapsulating method |
| CN107017372A (en) * | 2017-06-07 | 2017-08-04 | 上海精虹新能源科技有限公司 | A kind of new battery core bracket |
| CN109065769A (en) * | 2018-09-25 | 2018-12-21 | 华霆（合肥）动力技术有限公司 | Soft-package battery and battery modules |
| CN111640890A (en) * | 2020-06-01 | 2020-09-08 | 江西优特汽车技术有限公司 | Design method of portable diagnosis power supply |
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| CN104241555A (en) * | 2014-06-27 | 2014-12-24 | 惠州市德赛电池有限公司 | Lithium battery encapsulating method |
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| CN111640890A (en) * | 2020-06-01 | 2020-09-08 | 江西优特汽车技术有限公司 | Design method of portable diagnosis power supply |
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| CN103390768B (en) | 2015-04-22 |
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Address after: 518000 3rd floor, area a, building 3, Huiye Science Park, sightseeing Road, Tangjia community, Fenghuang street, Guangming District, Shenzhen City, Guangdong Province Patentee after: Shenzhen youteli Energy Co.,Ltd. Address before: 3 / F, building 3a, Huiye Science Park, sightseeing Road, Guangming New District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN UTILITY POWER SOURCE Co.,Ltd. |