CN106595823A - Method for quickly evaluating maximum liquid injection amount of lithium ion battery - Google Patents
Method for quickly evaluating maximum liquid injection amount of lithium ion battery Download PDFInfo
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- CN106595823A CN106595823A CN201611100340.7A CN201611100340A CN106595823A CN 106595823 A CN106595823 A CN 106595823A CN 201611100340 A CN201611100340 A CN 201611100340A CN 106595823 A CN106595823 A CN 106595823A
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- positive plate
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- 239000007788 liquid Substances 0.000 title claims abstract description 43
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 21
- 238000002347 injection Methods 0.000 title abstract description 10
- 239000007924 injection Substances 0.000 title abstract description 10
- 239000003792 electrolyte Substances 0.000 claims abstract description 51
- 239000011800 void material Substances 0.000 claims abstract description 11
- 230000004888 barrier function Effects 0.000 claims description 24
- 238000012937 correction Methods 0.000 claims description 12
- 238000005213 imbibition Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 238000011549 displacement method Methods 0.000 claims description 5
- 239000008151 electrolyte solution Substances 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 5
- 230000001186 cumulative effect Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 3
- 238000012986 modification Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 208000019206 urinary tract infection Diseases 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 238000003556 assay Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a quick evaluation method for the maximum liquid injection amount of a lithium ion battery, which comprises the steps of firstly measuring the liquid holding rates of a positive plate, a negative plate and a diaphragm;calculating the volume of the electrolyte absorbed by each electrolyte according to the liquid holding rate; firstly measuring the vacant volume V of the inner cavity of the battery shellSurplusDetecting the modification coefficient η of the void volume of the electrolyte contained in the cell, and finally calculating the total electrolyte injection quantity m of the batteryLiquid for treating urinary tract infection=（VSurplus+VAir conditioner×η) × rho. the evaluation method has simple operation and accurate result, shortens the debugging time, avoids the influence of frequent debugging of equipment on the precision and production of the equipment, can avoid the electrical property reduction of the battery caused by insufficient electrolyte injection amount, and can also provide accurate design parameters for the electrolyte injection amount of the battery.
Description
Technical field
The present invention relates to field of lithium ion battery, and in particular to a kind of quick side of evaluation and test of lithium ion battery maximum reservoir quantity
Method.
Background technology
Lithium ion battery liquid injection amount is a key factor for affecting lithium ion battery electrical property, if injecting electrolytic solution amount mistake
It is few, can cause that the internal resistance of cell is big, high rate performance is poor, cycle performance is poor；If reservoir quantity is excessive, the production time can be extended, be wasted
Electrolyte.Usual injecting electrolytic solution amount two parameters of selection gist, one is experience fluid injection parameter, and unit is g/Ah, i.e., according to electricity
The capacity in pond is multiplied by the reservoir quantity that corresponding fluid injection parameter draws battery, but this empirical parameter can be because of material, battery size, electricity
Pond processing technology it is different and different, parameter was both numerous and diverse and inaccurate, caused the reservoir quantity that calculates and actual deviation larger.Two
It is that this method is big to device dependence, and the conclusion for drawing does not have verifying the maximum reservoir quantity of battery by actual fluid injection
Universality, and debugging filling machine also can consume the plenty of time, affect manufacturing schedule, while frequently adjusting device parameter also can shadow
The fluid injection precision of the equipment of sound.
The rapid assay methods that the present invention is provided can calculate the maximum reservoir quantity that battery can inject, simple to operate fast
Speed, it is not necessary to by complicated equipment.
The content of the invention
In order to its maximum reservoir quantity is just can determine that at the beginning of battery design, the invention provides a kind of lithium ion battery is maximum
The quick evaluating method of reservoir quantity.
Technical scheme is as follows：A kind of quick evaluating method of the maximum reservoir quantity of lithium ion battery, including following step
Suddenly：
(1) weight and volume of positive plate is first measured, sealing and standing in the electrolytic solution is then completely soaked, after taking-up
Weighed after being wiped once from its surface rapidly with blotting paper immediately；Using the open ended electrolyte volume of positive plate and its own body
Long-pending ratio is calculating appearance liquid rate α of positive plateJust,
Then calculate appearance liquid rate α of negative plate in the same way respectivelyIt is negativeWith appearance liquid rate α of barrier filmFilm；
(2) volume V of the electrolyte absorbed by positive plate is calculated according to the appearance liquid rate of positive plateJust inhale=αJust× V, wherein V
For positive plate volume, αJustFor the appearance liquid rate of positive plate；Then negative plate liquid absorption V is calculated in the same wayInhale negativeWith barrier film imbibition
Amount VInhale film；
(3) first measure the void volume V of battery container inner chamberIt is remaining；Detect that battery core can accommodate the space body of electrolyte again
Product correction factor η；The total fluid-injecting amount m of battery is calculated finallyLiquid=(VIt is remaining+VIt is empty× η) × ρ, V in formulaIt is emptyFor electricity can be accommodated in battery core
The voidage of solution liquid, ρ is density of electrolyte.
Further scheme, appearance liquid rate α of the positive plate in the step (1)Just=(m1-m0)/ρ/V, m in formula1After imbibition
Positive pole tablet quality, m0For the positive pole tablet quality before imbibition, density of the ρ for electrolyte, volumes of the V for positive plate.
Further scheme, the temperature of the electrolyte in the step (1) is 30～55 DEG C, and the time of sealing and standing is 0.5-
3 hours.
Further scheme, the void volume V in the step (3)It is remainingIt is battery container inner chamber cumulative volume and be located at battery case
In vivo the volume shared by the battery core in portion, lug difference；The voidage that electrolyte can be accommodated in battery core is positive plate, negative pole
The liquid absorption sum of piece and barrier film, i.e. VIt is empty=VJust inhale+VInhale negative+VInhale film。
Further scheme, the measuring method of the voidage correction factor in the step (3) are as follows：
(1) detection constitutes gross mass m of the positive plate, negative plate and barrier film of battery core respectivelyTotal 0；
(2) all of which is immersed in into 0.5～3 hour of sealing and standing in the electrolyte that temperature is 30～55 DEG C, is taken out
After being wiped once from its surface rapidly with blotting paper, its gross weight is called m immediatelyTotal 1, then its draw electrolyte quality mInhale 1=mTotal 1-
mTotal 0；
(3) after the order laminating by the positive plate in step (1), negative plate and barrier film according to electric core winding or stacking simultaneously
Clamp into battery core so as to which the tensile force of clamping force and battery battery core is equal；
(4) battery core is fully immersed in into 0.5～3 hour of sealing and standing in the electrolyte that temperature is 30～55 DEG C, is taken out
After being wiped once from its surface rapidly with blotting paper, its gross weight is called m immediatelyTotal 2, then its draw electrolyte quality mInhale 2=mTotal 2-
mTotal 0；
(5) voidage correction factor η=mInhale 2/mInhale 1。
Further scheme, in the step (1), the volume of positive plate, negative plate and barrier film is by its overall size meter
Draw.
Further scheme, the void volume V of the battery container inner chamber in the step (3)It is remainingIt is using gas displacement method, liquid
What body displacement method or three-dimensional artificial software were measured.
Void volume-correction coefficient η values of the present invention are determining by the laminating degree between pole piece and barrier film.If by 1
Piece positive plate, 1 negative plate and 2 barrier films intersect stacking regards 1 unit as, then be 3 units in the present embodiment, experimental considerations unit
More, then the voidage correction factor for drawing is more accurate.
The rapid assay methods that the present invention is provided can calculate the maximum reservoir quantity that battery can inject, and simple to operate fast
Speed, it is not necessary to by complicated equipment.
The present invention evaluating method is simple to operate, result accurately, shorten debug time, it is to avoid equipment frequently debugs right
Equipment precision and the impact of production；And can avoid not enough causing the electrical property of battery to decline due to injecting electrolytic solution amount, alternatively
The reservoir quantity of battery provides accurate design parameter.
Description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is the battery core composition schematic diagram for measuring voidage correction factor η.
Specific embodiment
Embodiment 1：
A kind of quick evaluating method of the maximum reservoir quantity of lithium ion battery, comprises the following steps：
(1) weight and volume of positive plate is first measured, and temperature is then fully immersed in seal in 30 DEG C of electrolyte
3 hours are stood, is weighed after being wiped once from its surface rapidly with blotting paper after taking-up immediately；Using the open ended electrolysis of positive plate
Liquid accumulates with the ratio of its own volume to calculate appearance liquid rate α of positive plateJust=(m1-m0)/ρ/V, m in formula1For after imbibition just
Pole piece quality, m0For the positive pole tablet quality before imbibition, density of the ρ for electrolyte, V are the volume of positive plate,
Then calculate appearance liquid rate α of negative plate in the same way respectivelyIt is negativeWith appearance liquid rate α of barrier filmFilm；
(2) volume V of the electrolyte absorbed by positive plate is calculated according to the appearance liquid rate of positive plateJust inhale=αJust× V, wherein V
For positive plate volume, αJustFor the appearance liquid rate of positive plate；Then negative plate liquid absorption V is calculated in the same wayInhale negativeWith barrier film imbibition
Amount VInhale film；
(3) first measure battery container inner chamber cumulative volume and the battery core, the volume shared by lug being located inside battery container,
Both differences are the void volume V of battery container inner chamberIt is remaining；Detect that battery core can accommodate the voidage amendment system of electrolyte again
Number η；The total fluid-injecting amount m of battery is calculated finallyLiquid=(VIt is remaining+VIt is empty× η) × ρ, VIt is empty=VJust inhale+VInhale negative+VInhale film；V in formulaIt is emptyFor in battery core
The voidage of electrolyte can be accommodated, ρ is density of electrolyte.
Further scheme, the measuring method of the voidage correction factor in the step (3) are as follows：
(1) detection constitutes gross mass m of the positive plate 3, negative plate 3 and 6, barrier film of battery core respectivelyTotal 0；
(2) all of which is immersed in into 3 hours of sealing and standing in the electrolyte that temperature is 30 DEG C, taking-up blotting paper from
After the rapid wiping once in its surface, its gross weight is called m immediatelyTotal 1, then its draw electrolyte quality mInhale 1=mTotal 1-mTotal 0；
(3) positive plate 2 in step (1), negative plate 3 and barrier film 1 are stacked according to order laminating heap as shown in Figure 1
Come, then battery core is clamped in its both sides clamping plate 4, and make the tensile force of its clamping force and battery battery core equal；
(4) battery core is fully immersed in into 1 hour of sealing and standing in the electrolyte that temperature is 45 DEG C, taking-up blotting paper from
After the rapid wiping once in its surface, its gross weight is called m immediatelyTotal 2, then its draw electrolyte quality mInhale 2=mTotal 2-mTotal 0；
(5) voidage correction factor η=mInhale 2/mInhale 1。
Further scheme, in the step (1), the volume of positive plate, negative plate and barrier film is by its overall size meter
Draw.
Further scheme, the void volume V of the battery container inner chamber in the step (3)It is remainingIt is using gas displacement method, liquid
What body displacement method or three-dimensional artificial software were measured.
Embodiment 2：
A kind of quick evaluating method of the maximum reservoir quantity of lithium ion battery, comprises the following steps：
(1) weight and volume of positive plate is first measured, and temperature is then fully immersed in seal in 55 DEG C of electrolyte
0.5 hour is stood, is weighed after being wiped once from its surface rapidly with blotting paper after taking-up immediately；Using the open ended electricity of positive plate
Solve the ratio of liquid product and its own volume to calculate appearance liquid rate α of positive plateJust=(m1-m0)/ρ/V=0.08, in formula after imbibition
Positive pole tablet quality m1=315.3g, the positive pole tablet quality m before imbibition0=306.6g, density of electrolyte ρ=1.2g/cm3, positive pole
Piece volume V=94.3cm3,
Then calculate appearance liquid rate α of negative plate in the same way respectivelyIt is negative=0.16 and appearance liquid rate α of barrier filmFilm=
0.59；Concrete data are as shown in table 1 below：
Table 1
| m0(g) | m1(g) | V(cm3) | ρ(g/cm3) | |
| Positive plate | 306.6 | 315.3 | 94.3 | |
| Negative plate | 235.5 | 258.2 | 115 | |
| Barrier film | 23.8 | 52.3 | 40.4 | |
| Electrolyte | 1.2 |
(2) volume V of the electrolyte absorbed by positive plate is calculated according to the appearance liquid rate of positive plateJust inhale=αJust× V=
7.5cm3, wherein V be positive plate volume, αJustFor the appearance liquid rate of positive plate；Then negative plate imbibition body is calculated in the same way
Product VInhale negative=18.4cm3With barrier film imbibition volume VInhale film=23.8cm3；
(3) first measure battery container inner chamber cumulative volume and the battery core, the volume shared by lug being located inside battery container,
Both differences are the void volume V of battery container inner chamberIt is remaining=83cm3；Detect that battery core can accommodate the space body of electrolyte again
Product correction factor η=0.85；The total fluid-injecting amount m of battery is calculated finallyLiquid=(VIt is remaining+VIt is empty× η) × ρ=150.3g, VIt is empty=VJust inhale+
VInhale negative+VInhale film=49.7cm3；V in formulaIt is emptyFor the voidage that can accommodate electrolyte in battery core, ρ is density of electrolyte.
Further scheme, the measuring method of the voidage correction factor in the step (3) are as follows：
(1) detection constitutes gross mass m of the positive plate 3, negative plate 3 and 6, barrier film of battery core respectivelyTotal 0=58.3g；
(2) all of which is immersed in into 0.5 hour of sealing and standing, taking-up blotting paper in the electrolyte that temperature is 55 DEG C
After being wiped once from its surface rapidly, its gross weight is called m immediatelyTotal 1=65.8g, then its draw electrolyte quality mInhale 1=mTotal 1-
mTotal 0=7.5g；
(3) positive plate 2 in step (1), negative plate 3 and barrier film 1 are stacked according to order laminating heap as shown in Figure 1
Come, then battery core is clamped in its both sides clamping plate 4, and make the tensile force of its clamping force and battery battery core equal；
(4) battery core is fully immersed in into 1 hour of sealing and standing in the electrolyte that temperature is 45 DEG C, taking-up blotting paper from
After the rapid wiping once in its surface, its gross weight is called m immediatelyTotal 2=64.7g, then its draw electrolyte quality mInhale 2=mTotal 2-mTotal 0
=6.4g；
(5) voidage correction factor η=mInhale 2/mInhale 1=0.85.
The foregoing is only the preferred embodiment of patent of the present invention, not for limit the present invention practical range；It is i.e. all
The various equivalents done by right under this invention, are scope of the presently claimed invention.
Claims (7)
1. the quick evaluating method of a kind of lithium ion battery maximum reservoir quantity, it is characterised in that：Comprise the following steps：
（1）The weight and volume of positive plate is first measured, sealing and standing in the electrolytic solution is then completely soaked, with suction after taking-up
Black paper is weighed after being wiped once from its surface rapidly immediately；Using the open ended electrolyte volume of positive plate and its own volume
Ratio is calculating appearance liquid rate α of positive plateJust,
Then calculate appearance liquid rate α of negative plate in the same way respectivelyIt is negativeWith appearance liquid rate α of barrier filmFilm；
（2）Volume V of the electrolyte absorbed by positive plate is calculated according to the appearance liquid rate of positive plateJust inhale=αJust× V, wherein V are for just
Pole piece volume, αJustFor the appearance liquid rate of positive plate；Then negative plate liquid absorption V is calculated in the same wayInhale negativeWith barrier film liquid absorption
VInhale film；
（3）The void volume V of battery container inner chamber is measured firstIt is remaining；Detect that battery core can accommodate the voidage of electrolyte and repair again
Positive coefficient η；The total fluid-injecting amount m of battery is calculated finallyLiquid=（VIt is remaining+VIt is empty×η）×ρ,V in formulaIt is emptyFor electrolyte can be accommodated in battery core
Voidage, ρ are density of electrolyte.
2. quick evaluating method according to claim 1, it is characterised in that：The step（1）In positive plate appearance liquid
Rate αJust=（m1-m0）/ ρ/V, m in formula1For the positive pole tablet quality after imbibition, m0For the positive pole tablet quality before imbibition, ρ is electrolyte
Density, volumes of the V for positive plate.
3. quick evaluating method according to claim 1, it is characterised in that：The step（1）In electrolyte temperature
For 30～55 DEG C, the time of sealing and standing is 0.5-3 hours.
4. quick evaluating method according to claim 1, it is characterised in that：The step（3）In void volume VIt is remainingIt is
Battery container inner chamber cumulative volume and the battery core, volume shared by lug being located inside battery container difference；Can hold in battery core
Receive electrolyte voidage for positive plate, negative plate and barrier film liquid absorption sum, i.e. VIt is empty=VJust inhale+VInhale negative+VInhale film。
5. quick evaluating method according to claim 1, it is characterised in that：The step（3）In voidage amendment
The measuring method of coefficient is as follows：
（1）Detection respectively constitutes gross mass m of the positive plate, negative plate and barrier film of battery coreTotal 0；
（2）All of which is immersed in into 0.5～3 hour of sealing and standing in the electrolyte that temperature is 30～55 DEG C, taking-up is inhaled
From after its surface rapidly wiping once, its gross weight is called m to black paper immediatelyTotal 1, then its draw electrolyte quality mInhale 1=mTotal 1-mTotal 0；
（3）By step（1）In positive plate, negative plate and barrier film be according to after the order laminating of electric core winding or stacking and clamping
Into battery core so as to which the tensile force of clamping force and battery battery core is equal；
（4）Battery core is fully immersed in into 0.5～3 hour of sealing and standing in the electrolyte that temperature is 30～55 DEG C, taking-up is inhaled
From after its surface rapidly wiping once, its gross weight is called m to black paper immediatelyTotal 2, then its draw electrolyte quality mInhale 2=mTotal 2-mTotal 0；
（5）Voidage correction factor η=mInhale 2/mInhale 1。
6. quick evaluating method according to claim 1, it is characterised in that：The step（1）In positive plate, negative plate
Drawn by its overall size survey calculation with the volume of barrier film.
7. quick evaluating method according to claim 1, it is characterised in that：The step（3）In battery container inner chamber
Void volume VIt is remainingMeasured using gas displacement method, liquid displacement technique or three-dimensional artificial software.
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Cited By (5)
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| CN110487367A (en) * | 2019-07-18 | 2019-11-22 | 合肥国轩高科动力能源有限公司 | A kind of evaluating method of the maximum safe reservoir quantity of lithium ion battery |
| CN111740168A (en) * | 2020-05-25 | 2020-10-02 | 宁波维科电池有限公司 | Method for manufacturing battery |
| CN111785910A (en) * | 2020-08-11 | 2020-10-16 | 天津市捷威动力工业有限公司 | Method for determining liquid injection amount of lithium ion battery |
| CN114221046A (en) * | 2021-11-16 | 2022-03-22 | 天津力神电池股份有限公司 | Method for testing residual space volume in hard-shell lithium ion battery |
| CN116093558A (en) * | 2023-01-31 | 2023-05-09 | 湖北亿纬动力有限公司 | Method for determining battery liquid injection amount |
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| CN114221046A (en) * | 2021-11-16 | 2022-03-22 | 天津力神电池股份有限公司 | Method for testing residual space volume in hard-shell lithium ion battery |
| CN114221046B (en) * | 2021-11-16 | 2023-08-25 | 天津力神电池股份有限公司 | Method for testing residual space volume in hard shell lithium ion battery |
| CN116093558A (en) * | 2023-01-31 | 2023-05-09 | 湖北亿纬动力有限公司 | Method for determining battery liquid injection amount |
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| Publication number | Publication date |
|---|---|
| CN106595823B (en) | 2019-03-01 |
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