CN204216167U - Lithium-ion electric core body and the lithium ion battery with this battery core body - Google Patents
Lithium-ion electric core body and the lithium ion battery with this battery core body Download PDFInfo
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- CN204216167U CN204216167U CN201420754443.5U CN201420754443U CN204216167U CN 204216167 U CN204216167 U CN 204216167U CN 201420754443 U CN201420754443 U CN 201420754443U CN 204216167 U CN204216167 U CN 204216167U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The utility model discloses a kind of lithium-ion electric core body and the lithium ion battery with this battery core body.Battery core body comprises: negative plate bag, and described negative plate bag is made up of diaphragm bag and the negative plate be contained in described diaphragm bag, is also provided with a diaphragm frame at an outer surface of described diaphragm bag, and described positive plate is spacing in described diaphragm frame.Apply this technical scheme, be conducive to the capacity retention improving lithium ion, avoid battery short circuit.
Description
Technical field
The utility model relates to lithium ion and manufactures field, particularly relates to a kind of lithium-ion electric core body and the lithium ion battery with this battery core body.
Background technology
Since the lithium ion battery commercialization nineties in 20th century, lithium ion battery has become one of main power source of the portable type electronic product such as mobile communication, notebook computer with its high-energy-density, high voltage, energy density advantages of higher.
It is high to there is short circuit ratio in the lithium ion battery of prior art, the potential safety hazard of easy spontaneous combustion, and its capacity in use easily declines too fast, the defect such as life-span of battery is short.
Utility model content
One of object of the utility model embodiment is to provide a kind of lithium-ion electric core body and the lithium ion battery with this battery core body.Apply this technical scheme, be conducive to the capacity retention improving lithium ion, avoid battery short circuit.
A kind of lithium-ion electric core body that the utility model embodiment provides, comprising: negative plate bag, described negative plate bag is made up of diaphragm bag and the negative plate be contained in described diaphragm bag,
A diaphragm frame is also provided with at an outer surface of described diaphragm bag,
Positive plate is spacing in described diaphragm frame.
Alternatively, the barrier film hole on described diaphragm frame is greater than the barrier film hole on described diaphragm bag.
Alternatively, the outward flange of described diaphragm frame flushes with the outward flange of described diaphragm bag.
Alternatively, described diaphragm frame is positioned at the surf zone of the outer surface of described diaphragm bag.
Alternatively, the center of described diaphragm frame is empty.
Alternatively, described diaphragm frame comprises the diaphragm strip along described diaphragm bag four limit.
Alternatively, described diaphragm frame is provided with a breach at the width end place of described diaphragm bag, and the lug of described positive plate stretches out from described indentation, there.
Alternatively, described diaphragm frame is bonded in the outer surface of described diaphragm bag.
Alternatively, described diaphragm frame adhere is connected to the outer surface of described diaphragm bag.
A kind of lithium ion battery that the utility model embodiment provides, it comprises: electrolyte and above-mentioned arbitrary described battery core body, described battery core body and described electrolyte are sealed in an aluminum plastic film housing jointly, and described electrolyte infiltrates in described battery core body.
Therefore, application the present embodiment technical scheme, relative to prior art, narrower positive plate is entered the conventional techniques scheme of diaphragm bag, the present embodiment breaks through above-mentioned Traditional Thinking of the prior art, the negative plate of wider width is entered diaphragm bag, the both sides of the polar material applying area on negative plate are separated by two of diaphragm bag just right diaphragms and outside respectively.Like this, in lithium ion battery preparation process, even if the polar material of negative plate is scattered, but, due to the restriction of diaphragm bag, negative electrode powder is limited in diaphragm bag and is not easy to overflow diaphragm bag and contacts with positive plate, avoids the negative electrode powder of being easily scattered and positive contact and causes battery short circuit to cause the problem of battery spontaneous combustion.
In addition, also be provided with diaphragm frame outward at the diaphragm bag of negative plate, positive plate inserted in this diaphragm frame, diaphragm frame fixing under, positive plate is also not easy to displacement, avoids positive plate displacement in winding process or lamination process to cause positive/negative plate not just to the problem of mutual dislocation.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, forms a application's part, does not form improper restriction of the present utility model.
A kind of surface texture schematic diagram of negative plate bag of Fig. 1 for providing in the utility model embodiment 1;
Fig. 2 is another surface texture schematic diagram of negative plate bag shown in Fig. 1 in the utility model embodiment 1;
The structural representation loaded onto in diaphragm frame shown in Fig. 1 after positive plate that Fig. 3 provides for the utility model embodiment 1;
The surface texture schematic diagram of another kind of negative plate bag of Fig. 4 for providing in the utility model embodiment 1.
Reference numeral:
100: negative plate bag; 101: diaphragm bag; 102: negative plate;
103: diaphragm frame; 104: positive plate; 105: anode ear;
106: negative electrode lug.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, be used for explaining the utility model in this illustrative examples of the present utility model and explanation, but not as to restriction of the present utility model.
Shown in Fig. 1-3, the lithium-ion electric core body that the present embodiment provides mainly comprises: negative plate bag 100, and this negative plate bag 100 is made up of diaphragm bag 101 and the negative plate 102 be contained in this diaphragm bag 101.
When preparing negative plate bag 100, two diaphragms can be got respectively, between two diaphragms, negative plate 102 is placed at interval, the negative electrode lug 106 of negative plate 102 is extended from the width end edge of diaphragm bag 101, heat pressing packaging device hot pressing diaphragm edge by two diaphragm heat-sealings, can be formed in the negative plate bag 100 accompanying negative plate 102 in the middle of two barrier films.
In the present embodiment, be also equipped with a diaphragm frame 103 at an outer surface of the diaphragm bag 101 of negative plate bag 100, this diaphragm frame 103 is made up of diaphragm strip, and the positive plate 104 of battery core body is contained in diaphragm frame 103, and four periderm diaphragm frames 103 are spacing.
When carrying out winding battery core body and preparing, above-mentioned stacked negative plate bag 100 and positive plate 104 are reeled, obtain the winding battery core body of lithium ion battery.
When carrying out stacked battery core body and preparing, by said structure, in turn the above-mentioned structure be made up of negative plate bag 100, positive plate 104 is carried out the stacked laminated battery core body that can obtain lithium ion battery.
Therefore, relative to prior art, narrower positive plate 104 is entered the conventional techniques scheme of diaphragm bag, the present embodiment breaks through above-mentioned Traditional Thinking of the prior art, the negative plate 102 of wider width is entered diaphragm bag 101, the both sides of the polar material applying area on negative plate 102 are separated by two of diaphragm bag 101 just right diaphragms and outside respectively.Like this, in lithium ion battery preparation process, even if the polar material of negative plate 102 is scattered, but, due to the restriction of diaphragm bag 101, negative electrode powder is limited in diaphragm bag 101 and is not easy to overflow diaphragm bag 101 and contacts with positive plate 104, avoids the negative electrode powder of being easily scattered and positive contact and causes battery short circuit to cause the problem of battery spontaneous combustion.
In addition, diaphragm frame 103 is also provided with outside the diaphragm bag 101 of negative plate 102, positive plate 104 is inserted in this diaphragm frame 103, diaphragm frame 103 fixing under, positive plate 104 is also not easy to displacement, avoids positive plate 104 displacement in winding process or lamination process to cause positive/negative plate 102 not just to the problem of mutual dislocation.
As the signal of the present embodiment, the diaphragm frame 103 of the present embodiment is made up of the diaphragm strip along diaphragm bag 101 surrounding, the centre position of this diaphragm frame 103 is empty, positive plate 104 is just positioned at the hollow frame at diaphragm frame 103 center, therefore the design of diaphragm frame 103 can not affect thickness and the capacity of battery core body, on the contrary due to the design of diaphragm frame 103, battery can absorb more electrolyte, when electrolyte is few, the electrolyte of absorption can be inhaled and release, avoid because insufficient electrolyte causes the problem of battery capacity step-down.
As the signal of the present embodiment, the porosity of the barrier film on the diaphragm frame 103 of the present embodiment preferably but be not limited to the porosity of the barrier film being greater than diaphragm bag 101.Diaphragm frame 103 is had be better than guarantor's fluidity of diaphragm bag 101, when electrolyte is few, better the electrolyte of absorption can be inhaled and release, avoid because insufficient electrolyte causes the problem of battery capacity step-down.
As the signal of the present embodiment, the outward flange of the diaphragm frame 103 of the present embodiment flushes with the outward flange of diaphragm bag 101, middle hollow frame size and the length and width consistent size of positive plate 104, positive plate 104 is made just to be positioned at the hollow frame of diaphragm frame 103, be convenient to the location stacked of positive plate 104, improve the accuracy that stacks, guarantee positive plate 104 and negative plate 102 just to property, and be convenient to technological operation.
As the signal of the present embodiment, shown in Figure 4, can be, but not limited to diaphragm frame 103 to be arranged to shown in Fig. 4, be not provided with the unnotched structure of width end with anode ear 105 mating shapes.
Shown in Figure 3, the present embodiment diaphragm frame 103 gone back preferred but be not limited to be provided with a breach, this breach is positioned at the width end of diaphragm bag 101, when positive plate 104 inserts the hollow frame of diaphragm frame 103, the anode ear 105 of positive plate 104 stretches out from the indentation, there of diaphragm frame 103, further facilitates the location of positive plate 104.
As the signal of the present embodiment, when preparing negative plate bag 100, the diaphragm strip of diaphragm frame 103 can being laid on the surface of diaphragm bag 101, when sealing diaphragm bag 101, diaphragm frame 103 being sealed adhere at diaphragm bag 101 outer surface simultaneously.Also after making negative plate bag 100, by modes such as stickups, diaphragm frame 103 can be bonded in the outer surface of diaphragm bag 101.
After obtaining the lithium-ion electric core body (winding battery core body or laminated battery core body) of said structure, this battery core body is carried out aluminum plastic film encapsulation, electrolyte filling, obtains lithium ion battery.Battery core body and electrolyte are sealed in an aluminum plastic film housing jointly in the cell, and electrolyte infiltrates in battery core body, is fully absorbed by diaphragm bag 101 and diaphragm frame 103.
Test data analyzer:
Embodiment 2:
Adopt the laminated battery core body of structure shown in Fig. 1-3 in the present embodiment 1, make laminated lithium ion battery sample, wherein the barrier film porosity of diaphragm frame 103 is 44%, and the barrier film porosity of diaphragm bag 101 is 38%, and the specification of this laminated lithium ion battery sample is: ASP7042126-N2A-3700mAh.Wherein, AS represents pure cobalt water-base cathode, and 7042126 indicate the thick, wide, long of this polymer Li-ion battery is of a size of 7mm, 42mm, 126mm, N represents that nominal multiplying power is 5C, 2 represent that battery is high capacity type, and A represents just very pure cobalt acid lithium, the nominal capacity of 3700 expression batteries.
Embodiment 3:
The present embodiment is consistent with the specification of the lithium ion battery sample in embodiment 2, and its difference is only:
The present embodiment adopts the narrower positive plate of width to be encapsulated in (namely positive plate enters a bag technique) in diaphragm bag, and negative plate is layered in outside the diaphragm bag of positive plate, is not provided with diaphragm frame outward at diaphragm bag.
Due in field of lithium ion battery, the width of negative plate needs the width slightly larger than positive plate, therefore also cannot be designed for the diaphragm frame of spacing negative plate outward at the diaphragm bag of positive plate.
Embodiment 4:
The present embodiment is consistent with the specification of the lithium ion battery sample in embodiment 2, and its difference is only:
Be not provided with diaphragm frame outward at diaphragm bag, negative plate is directly layered in outside the diaphragm bag of positive plate.
Embodiment 5:
The present embodiment is consistent with the specification of the lithium ion battery sample in embodiment 2, and its difference is only:
Be outside equipped with diaphragm frame at diaphragm bag, the barrier film porosity of diaphragm frame and the consistent of diaphragm bag, be 43%.
Embodiment 6:
The present embodiment is consistent with the specification of the lithium ion battery sample in embodiment 2, and its difference is only:
Be outside equipped with diaphragm frame at diaphragm bag, the barrier film porosity of diaphragm frame is less than the barrier film porosity of diaphragm bag.
100, the laminated lithium ion battery sample obtained in Example 2-6 respectively, carries out short circuit ratio and low capacity rate analysis respectively according to following method of testing:
Short-circuit test: after lamination completes and obtains laminated battery core body, get each 100 of the laminated battery core samples of each embodiment, with insulation internal resistance instrument, short-circuit test is carried out to laminated battery core body, specifically, between between the lug of both positive and negative polarity, a given magnitude of voltage is the high tension voltage of 250V, test the internal resistance of each battery core body, when the internal resistance of certain battery core body reaches or more than 250M Ω, then judge that this battery core body is qualified, be not short-circuited, otherwise, if the internal resistance of battery core body is less than 250M Ω, then judge that this battery core body is defective, be short-circuited.
The present inventor finds in carry out this experimentation, if there is barrier film breakage or burr in certain battery core body, then when loading high tension voltage to this battery core body, barrier film can be there is puncture, the both positive and negative polarity of battery core body is caused to contact, battery core body is short-circuited, by the circuit rate of above-mentioned method of testing energy Validity Test battery core body.
Adopt said method can obtain the short circuit ratio of each embodiment electricity core samples, specifically as shown in Table 1.
Volume test: after aluminum plastic film encapsulation, fluid injection are carried out to laminated battery core body, change into, bleed and aluminum plastic film secondary pumping encapsulation after, by prestige test cabinet new on each lithium ion battery sample to be tested, carry out partial volume test, get each embodiment battery sample respectively 100 carry out above-mentioned test, wherein each battery sample is all non-shorting.
Battery sample is full of electricity with the electric current of 0.5C and is charged to 4.2V, then discharge into cut-ff voltage 3.0V with 0.5C, discharge capacity is less than normal capacity and is then judged to be low appearance.
The battery specifications 7042126-N2A-3700mAh specified for the present embodiment, if discharge capacity is less than 3700mAh, is low appearance battery, thus obtains the test data shown in table one.
Table one: experimental test tables of data
| Project | Short circuit ratio | Low capacity rate |
| Embodiment 2 | 0.05％ | 0.02％ |
| Embodiment 3 | 0.13％ | 0.33％ |
| Embodiment 4 | 0.06％ | 0.31％ |
| Embodiment 5 | 0.05％ | 0.21％ |
| Embodiment 6 | 0.06％ | 0.30％ |
Therefore the electric core samples that embodiment 2,4,5,6 obtains, battery sample are all significantly less than the sample adopting embodiment 3 to obtain on the short circuit ratio and low capacity rate of battery.Especially, it should be noted that, although embodiment 3 and the difference of embodiment 4 are only to be positive plate or negative plate into diaphragm bag, according to convention, the battery core body that it obtains and battery performance should be similar, but from table one data, adopt negative plate to enter the short circuit ratio of the lithium ion battery that bag technique obtains and low capacity rate declines greatly.
In addition, embodiment 2,4,5,6 all adopts negative plate to enter bag, but the negative plate of embodiment 2,5,6 is also provided with diaphragm frame, and it is relative to embodiment 4 for arranging the technical scheme of diaphragm frame, and its low capacity rate reduces greatly.
In addition, embodiment 2,5,6 is provided with diaphragm frame, but due to the barrier film porosity of embodiment 2 septation frame comparatively large, the low capacity rate of battery of its correspondence reduces greatly.
Above-described execution mode, does not form the restriction to this technical scheme protection range.The amendment done within any spirit at above-mentioned execution mode and principle, equivalently to replace and improvement etc., within the protection range that all should be included in this technical scheme.
Claims (10)
1. a lithium-ion electric core body, is characterized in that, comprising: negative plate bag, and described negative plate bag is made up of diaphragm bag and the negative plate be contained in described diaphragm bag,
A diaphragm frame is also provided with at an outer surface of described diaphragm bag,
Positive plate is spacing in described diaphragm frame.
2. lithium-ion electric core body according to claim 1, is characterized in that,
Barrier film hole on described diaphragm frame is greater than the barrier film hole on described diaphragm bag.
3. lithium-ion electric core body according to claim 1, is characterized in that,
The outward flange of described diaphragm frame flushes with the outward flange of described diaphragm bag.
4. lithium-ion electric core body according to claim 1, is characterized in that,
Described diaphragm frame is positioned at the surf zone of the outer surface of described diaphragm bag.
5. lithium-ion electric core body according to claim 1, is characterized in that,
The center of described diaphragm frame is empty.
6. lithium-ion electric core body according to claim 5, is characterized in that,
Described diaphragm frame comprises the diaphragm strip along described diaphragm bag four limit.
7. lithium-ion electric core body according to claim 6, is characterized in that,
Described diaphragm frame is provided with a breach at the width end place of described diaphragm bag, and the lug of described positive plate stretches out from described indentation, there.
8. lithium-ion electric core body according to claim 1, is characterized in that,
Described diaphragm frame is bonded in the outer surface of described diaphragm bag.
9. lithium-ion electric core body according to claim 1, is characterized in that,
Described diaphragm frame adhere is connected to the outer surface of described diaphragm bag.
10. a lithium ion battery, is characterized in that, comprising: the arbitrary described battery core body of electrolyte, claim 1 to 9, and described battery core body and described electrolyte are sealed in an aluminum plastic film housing jointly, and described electrolyte infiltrates in described battery core body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420754443.5U CN204216167U (en) | 2014-12-04 | 2014-12-04 | Lithium-ion electric core body and the lithium ion battery with this battery core body |
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| CN201420754443.5U CN204216167U (en) | 2014-12-04 | 2014-12-04 | Lithium-ion electric core body and the lithium ion battery with this battery core body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485481A (en) * | 2014-12-04 | 2015-04-01 | 深圳市格瑞普电池有限公司 | Lithium ion battery cell and lithium ion battery with same |
| CN109786664A (en) * | 2019-02-01 | 2019-05-21 | 江苏烨晨智能科技有限公司 | A kind of battery pole piece bracket |
-
2014
- 2014-12-04 CN CN201420754443.5U patent/CN204216167U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485481A (en) * | 2014-12-04 | 2015-04-01 | 深圳市格瑞普电池有限公司 | Lithium ion battery cell and lithium ion battery with same |
| CN109786664A (en) * | 2019-02-01 | 2019-05-21 | 江苏烨晨智能科技有限公司 | A kind of battery pole piece bracket |
| CN109786664B (en) * | 2019-02-01 | 2021-06-25 | 上海兰钧新能源科技有限公司 | Battery pole piece support |
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