CN102623650B - Hard shell lithium ion battery - Google Patents
Hard shell lithium ion battery Download PDFInfo
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- CN102623650B CN102623650B CN201210032331.4A CN201210032331A CN102623650B CN 102623650 B CN102623650 B CN 102623650B CN 201210032331 A CN201210032331 A CN 201210032331A CN 102623650 B CN102623650 B CN 102623650B
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- lithium ion
- ion battery
- 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
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Abstract
The present invention belongs to the technical field of lithium ion battery, and particularly relates to a hard shell lithium ion battery with high safety performance, wherein the hard shell lithium ion battery comprises an electrical core and a shell accommodating the electrical core, the front end of the electrical core is provided with a positive electrode lug and a negative electrode lug, the shell comprises a shell main body and a top cover, the top cover is provided with a positive terminal, a negative terminal, an explosion-proof valve and a liquid injection hole, and an insulating shell is provided between the electrical core and the shell. Compared to the prior art, the hard shell lithium ion battery of the present invention has the following advantages that: during the normal use process of the electrical core, the effective insulating protection from the shell can be provided, such that the generation of positive-negative short circuit can be avoided during the series parallel connection use of the electrical core due to shell contacting; when the internal short-circuit of the electrical core is generated due to unexpected situations or the internal short-circuit is directly generated, the contact of the electrical core shell and the electrical core can be effectively prevented, and the occurrence of melt-through phenomenon of the shell due to the positive-negative electrode short circuit can be prevented so as to substantially improve the safety performance of the hard shell lithium ion battery.
Description
Technical field
The invention belongs to technical field of lithium ion, relate in particular to a kind of lithium ion battery with hard shell with high safety performance.
Background technology
Lithium ion battery, because it has high-energy-density, high voltage, low self-discharge and the feature such as lightweight, is all widely used in every field.In recent years, lithium ion battery is also progressively applied in the fields such as electric tool, power vehicle.By contrast, the lithium ion battery of electric tool, the application of power vehicle field has the advantages that monomer is larger, energy density is higher.Therefore all the security performance of lithium ion battery is had higher requirement in design, or in application.
As shown in Figure 1, lithium ion battery with hard shell is generally comprised of the metal shell 2 of at least one coiled battery core 1 or several battery cores superposeing successively 1 and parcel battery core 1, metal shell 2 comprises housing main body 21 and top cover 22, the front end of battery core 1 is provided with positive pole ear 11 and negative lug 12, top cover 22 is provided with positive terminal 221, negative terminal 222, liquid injection hole 223 and explosion-proof valve 224, positive pole ear 11 is welded to connect with positive terminal 221, and negative lug 12 is welded to connect with negative terminal 222.During assembling, first battery core 1 is put into the housing main body 21 of metal shell 2, then loaded onto top cover 22, positive pole ear 11 and positive terminal 221 are welded to connect, negative lug 12 is welded to connect with negative terminal 222.Then in metal shell 2, inject electrolyte, through welding, change into, the operation such as sealing, be finally assembled into lithium ion battery with hard shell.
In use there is certain potential safety hazard in current lithium ion battery with hard shell: in the connection in series-parallel application of battery, when the housing of adjacent two battery cores contacts, the conducting meeting of housing makes the both positive and negative polarity short circuit of battery, and then causes the security incidents such as battery core is overheated, on fire, blast.As shown in Figure 1, battery is in abuse process, and the effect due to unfavorable factors such as high temperature, high pressure, corrosion, can make battery core 1 cause both positive and negative polarity short circuit by metal shell 2.In this process, battery core 1 is maximum with the resistance of the contact point 23 of metal shell 2, causes the temperature of contact point 23 sharply to raise, and finally causes metal shell 2 to be burnt, and then make fuel gas, high temperature dot, the extraneous oxygen three of battery core 1 inside and deposit, cause battery combustion incident.
In view of this, necessaryly provide a kind of lithium ion battery with hard shell with high safety performance.
Summary of the invention
The object of the invention is to: for the deficiencies in the prior art, and provide a kind of lithium ion battery with hard shell with high safety performance.
In order to achieve the above object, the present invention adopts following technical scheme:
A kind of lithium ion battery with hard shell, comprise battery core and the shell that holds described battery core, described battery core front end is provided with positive pole ear and negative lug, described shell comprises housing main body and top cover, described top cover is provided with positive terminal, negative terminal, explosion-proof valve and liquid injection hole, described positive pole ear is connected with described negative terminal with described positive terminal respectively with negative lug, between described battery core and shell, is provided with insulation shell.Insulation shell is the material with certain mechanical strength, and case material itself has good resistance to elevated temperatures, decay resistance and insulation property.
With respect to prior art, the invention has the advantages that:
The one, in the normal use procedure of battery core, effectively insulation crust, avoids battery core by housing, to contact the both positive and negative polarity short circuit occurring when connection in series-parallel is used;
The 2nd, when causing battery core internal short-circuit or directly internal short-circuit occurring because of fortuitous event, can effectively stop the shell of battery core to contact with battery core, prevent the generation of the burn through phenomenon that housing causes because of both positive and negative polarity short circuit, and then prevent under extreme service condition, the even explosion phenomenon of catching fire that battery core caused because housing lost efficacy, thus the security performance of lithium ion battery with hard shell significantly improved.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described insulation shell comprises the drain pan that wraps up described battery core and the insulating trip that is placed in described battery core front end.One of the assembled formation of drain pan and the insulating trip airtight insulation shell between battery core and shell, effectively separates battery core and metal shell.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described insulating trip is provided with positive terminal hole, negative terminal hole, explosion-proof valve opening and fluid injection and uses hole.Positive terminal hole, negative terminal hole, explosion-proof valve opening and fluid injection correspond respectively to positive terminal, negative terminal, explosion-proof valve and the liquid injection hole on top cover with the position in hole, so that the positive pole ear in battery core and negative lug can be respectively with top cover on positive terminal and negative terminal be welded to connect, and electrolyte can inject in battery core with hole by liquid injection hole and fluid injection.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described insulating trip and drain pan are by buckle or be welded to connect, and the two forms an airtight integral body, and battery core and shell are kept apart.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described insulation shell is the aluminium flake that mica sheet or surface treatment have oxide layer, and mica sheet itself has good insulation property, and plated surface has the aluminium flake of oxide layer also to have good insulation property.
As a kind of improvement of lithium ion battery with hard shell of the present invention, the thickness of described oxide layer is 0.5～5 μ m.The thickness of oxide layer is too little, and insulating effect is obvious not, and the thickness of oxide layer is too large, is unfavorable for the raising of lithium ion battery with hard shell energy density.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described housing main body is connected by laser welding with top cover.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described shell is box hat or aluminum hull, because box hat or aluminum hull itself have certain hardness, makes battery have certain impact resistance.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described insulation shell and shell connect as one by bonding, so can make insulation shell and shell closely link together, and prevent the loosening of insulation shell.
As a kind of improvement of lithium ion battery with hard shell of the present invention, described positive pole ear and negative lug are welded to connect with described positive terminal and negative terminal respectively.The other end of positive terminal and negative terminal is electrically connected with the external world, and the electric energy of inside battery is derived.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated:
Fig. 1 is the lithium ion battery with hard shell of prior art;
Fig. 2 is generalized section of the present invention;
Fig. 3 is the generalized section of insulating trip part of the present invention;
Fig. 4 is the structural representation of drain pan part of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail:
Refer to Fig. 2, Fig. 3 and Fig. 4, lithium ion battery with hard shell of the present invention, comprise battery core 3 and the shell 4 that holds described battery core 3, described battery core 3 front ends are provided with positive pole ear 31 and negative lug 32, described shell 4 comprises housing main body 41 and top cover 42, described top cover 42 is provided with positive terminal 421, negative terminal 422, explosion-proof valve 423 and liquid injection hole 424, described positive pole ear 31 is connected with described negative terminal 422 with described positive terminal 421 respectively with negative lug 32, between described battery core 3 and shell 4, is provided with insulation shell 5.
Wherein, described insulation shell 5 comprises the drain pan 51 that wraps up described battery core 3 and the insulating trip 52 that is placed in described battery core 3 front ends.
As shown in Figure 3, described insulating trip 52 is provided with positive terminal hole 521, negative terminal hole 522, explosion-proof valve opening 523 and fluid injection and uses hole 524.Positive terminal 421, negative terminal 422, explosion-proof valve 423 and liquid injection hole 424 that described positive terminal hole 521, negative terminal hole 522, explosion-proof valve opening 523 and fluid injection are provided with described top cover 42 respectively with hole 524 are corresponding one by one, so that positive pole ear 31 can be welded to connect with positive terminal 421, negative lug 32 can be welded to connect with negative terminal 422, and can flow through liquid injection hole 424 and fluid injection of electrolyte enters battery core 3 inside with hole 524.Positive terminal 421 and negative terminal 422 are externally electrically connected.
Described insulating trip 52 and drain pan 51 are by buckle or be welded to connect, and to form the insulation shell 5 of a sealing, thereby battery core 3 and shell 4 insulation are come.
Described insulation shell 5 is the aluminium flake (as shown in Figure 4) that mica sheet or surface treatment have oxide layer 53.
The thickness of described oxide layer 53 is 0.5～5 μ m.
Described housing main body 41 is connected with top cover 42 laser welding.
Described shell 4 is box hat or aluminum hull.
Described insulation shell 5 and shell 4 connect as one by bonding.
During actual use, the size of the size of insulation shell 5 and battery core 3 matches, and can accommodate battery core 3; The size of the size of shell 4 and insulation shell 5 matches, and can accommodate insulation shell 5.
During assembling, first the positive pole ear 31 of battery core 3 front ends is connected by ultrasonic bonding with negative terminal 422 with the positive terminal 421 on top cover 42 respectively with negative lug 32, then battery core 3 is placed in the drain pan 51 of insulation shell 5, again the drain pan 51 that battery core 3 is housed is placed in housing main body 41, at battery core 3 front ends, place insulating trip 52, between insulating trip 52 and drain pan 51, by welding or buckle, connect, or be combined into one by the restriction of top cover 42 and housing main body 41; And then top cover 42 is welded on housing main body 41 by laser welding, complete the assembling of lithium ion battery with hard shell.Finally, from the liquid injection hole 424 of top cover 42, inject electrolyte, after changing into, vacuumizing, use steel ball sealing liquid injection hole 424, obtain lithium ion battery with hard shell of the present invention.
Certainly, during assembling, also can first will between drain pan 51 and housing main body 41, by bonding, connect as one, then the positive pole ear 31 of battery core 3 front ends is connected by ultrasonic bonding with negative terminal 422 with the positive terminal 421 on top cover 42 respectively with negative lug 32, then battery core 3 is placed in the integral body of drain pan 51 and housing main body 41 compositions, at battery core 3 front ends, place insulating trip 52, between insulating trip 52 and drain pan 51, by welding or buckle, connect; And then top cover 42 is welded on housing main body 41 by laser welding, complete the assembling of lithium ion battery with hard shell.Finally, from the liquid injection hole 424 of top cover 42, inject electrolyte, after changing into, vacuumizing, use steel ball sealing liquid injection hole 424, obtain lithium ion battery with hard shell of the present invention.
Lithium ion battery with hard shell of the present invention, has wrapped up battery core 3 because insulation shell 5 is whole, battery core 3 and shell 4 is completely cut off and come, the both positive and negative polarity short circuit of having avoided battery core 3 to occur by shell 4 contacts when connection in series-parallel is used; And insulation shell 5 itself has the performances such as anticorrosive, high temperature resistant, therefore, even when causing battery core 3 internal short-circuits or directly internal short-circuit occurring because of fortuitous event, still can effectively stop the shell 4 of battery core 3 to contact with battery core 3, prevent the generation of the burn through phenomenon that shell 4 causes because of both positive and negative polarity short circuit, and then prevent under extreme service condition, the even explosion phenomenon of catching fire that battery core 3 caused because shell 4 lost efficacy, thus the security performance of lithium ion battery with hard shell significantly improved.
It should be noted that, the announcement of book and elaboration according to the above description, those skilled in the art in the invention can also change and revise above-mentioned execution mode.Therefore, the present invention is not limited to embodiment disclosed and described above, also should be in the protection range of claim of the present invention to equivalent modifications more of the present invention and change.In addition,, although used some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (7)
1. a lithium ion battery with hard shell, comprise battery core and the shell that holds described battery core, described battery core front end is provided with positive pole ear and negative lug, described shell comprises housing main body and top cover, described top cover is provided with positive terminal, negative terminal, explosion-proof valve and liquid injection hole, described positive pole ear is connected with described negative terminal with described positive terminal respectively with negative lug, it is characterized in that: between described battery core and shell, be provided with insulation shell, described insulation shell comprises the drain pan that wraps up described battery core and the insulating trip that is placed in described battery core front end, described insulation shell is the aluminium flake that mica sheet or surface treatment have oxide layer, described insulation shell and shell connect as one by bonding.
2. lithium ion battery with hard shell according to claim 1, is characterized in that: described insulating trip is provided with positive terminal hole, negative terminal hole, explosion-proof valve opening and fluid injection and uses hole.
3. lithium ion battery with hard shell according to claim 1, is characterized in that: described insulating trip and drain pan are by buckle or be welded to connect.
4. lithium ion battery with hard shell according to claim 1, is characterized in that: the thickness of described oxide layer is 0.5～5 μ m.
5. lithium ion battery with hard shell according to claim 1, is characterized in that: described housing main body is connected by laser welding with top cover.
6. lithium ion battery with hard shell according to claim 1, is characterized in that: described shell is box hat or aluminum hull.
7. lithium ion battery with hard shell according to claim 1, is characterized in that: described positive pole ear and negative lug are welded to connect with described positive terminal and negative terminal respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210032331.4A CN102623650B (en) | 2012-02-14 | 2012-02-14 | Hard shell lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210032331.4A CN102623650B (en) | 2012-02-14 | 2012-02-14 | Hard shell lithium ion battery |
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| Publication Number | Publication Date |
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| CN102623650A CN102623650A (en) | 2012-08-01 |
| CN102623650B true CN102623650B (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210032331.4A Active CN102623650B (en) | 2012-02-14 | 2012-02-14 | Hard shell lithium ion battery |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014533648A (en) | 2011-11-18 | 2014-12-15 | ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ | Zeolite ion exchange method |
| CN102856581A (en) * | 2012-10-11 | 2013-01-02 | 山东天阳新能源有限公司 | Lithium iron phosphate aluminum-shell square cell and preparation method thereof |
| CN104282864B (en) * | 2013-07-02 | 2017-08-25 | 上海通用汽车有限公司 | It can reduce or eliminate the battery of sheath voltage and prepare the method for the battery |
| CN103390731B (en) * | 2013-07-30 | 2016-01-06 | 奇瑞新能源汽车技术有限公司 | A kind of internal structure of power lithium-ion battery |
| CN105244458B (en) * | 2015-11-05 | 2019-05-14 | 天津市捷威动力工业有限公司 | A kind of aluminum hull secondary cell |
| CN105633310B (en) * | 2016-03-28 | 2018-11-20 | 宁德时代新能源科技股份有限公司 | Secondary battery top cover assembly, secondary battery containing same and assembling method |
| CN107528084A (en) * | 2016-06-20 | 2017-12-29 | 宁德新能源科技有限公司 | Lithium ion battery with hard shell and its battery cap |
| CN108832223B (en) * | 2018-05-25 | 2020-11-06 | 欣旺达电子股份有限公司 | High-thermal-conductivity battery bottom supporting plate and lithium ion battery |
| CN110429211B (en) * | 2019-08-07 | 2020-11-20 | 珠海格力电器股份有限公司 | Roll up core subassembly and battery |
| CN211605201U (en) * | 2020-03-31 | 2020-09-29 | 宁德新能源科技有限公司 | Battery and electric device with same |
| CN114583415B (en) * | 2022-04-15 | 2022-08-09 | 宁德新能源科技有限公司 | Battery and electronic device |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1929185A (en) * | 2005-09-08 | 2007-03-14 | 黄穗阳 | Colloidal electrolyte lithium ion electrokinetic cell for electric vehicle |
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2012
- 2012-02-14 CN CN201210032331.4A patent/CN102623650B/en active Active
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| CN2373900Y (en) * | 1999-02-12 | 2000-04-12 | 邱善鑫 | Plastic square-shaped rechargeable lithium battery |
| CN101267023A (en) * | 2008-04-30 | 2008-09-17 | 成都中科来方能源科技有限公司 | Plastic shell lithium ion battery and its making method |
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| CN102623650A (en) | 2012-08-01 |
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