CN105371930A - Battery filling detection device and battery filling detection method - Google Patents
Battery filling detection device and battery filling detection method Download PDFInfo
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- CN105371930A CN105371930A CN201510196465.3A CN201510196465A CN105371930A CN 105371930 A CN105371930 A CN 105371930A CN 201510196465 A CN201510196465 A CN 201510196465A CN 105371930 A CN105371930 A CN 105371930A
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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
Abstract
The invention is applicable to the field of battery detection equipment, and provides a battery filling detection device and a battery filling detection method. The battery filling detection device comprises an electrolyte containing vessel used for containing electrolyte, a weight collector used for measuring the weight, an accommodating cylinder used for accommodating a bare battery cell in a matching manner, a vacuum suction mechanism, and a breathable film used for preventing electrolyte from entering the vacuum suction mechanism. A bare battery cell is installed in the accommodating cylinder, and the vacuum suction mechanism sucks electrolyte in the electrolyte containing vessel into the accommodating cylinder so as to make the electrolyte injected into the bare battery cell through permeation. The weight collector collects the weight of the electrolyte in the electrolyte containing vessel in real time. As the electrolyte permeates into the bare battery cell, the weight of the electrolyte in the electrolyte containing vessel decreases gradually. Therefore, the filling time and the filling volume of the bare battery cell can be determined according to real-time data recorded by the weight collector, and the real-time filling rate of the bare battery cell can be determined. The battery filling detection device and the battery filling detection method have the advantages of high efficiency and low cost.
Description
Technical field
The invention belongs to battery detection equipment field, particularly relate to a kind of battery liquid-filling pick-up unit and battery liquid-filling detection method.
Background technology
Battery will consider many factors in the design process, naked battery core selects reservoir quantity, the factor of injecting electrolytic solution time of the electrolytic solution that different materials is corresponding, as negative pole compacted density (i.e. the compacted density of negative material), barrier film the selection of material etc. factor.Thus just need to carry out various test to naked battery core when design, making.Prior art naked battery core injecting electrolytic solution detects general by the multiple contrast experiment of design, and judged reservoir quantity and the fluid injection time of naked battery core by naked eyes, efficiency is low, and cost is high.
Summary of the invention
The object of the present invention is to provide a kind of battery liquid-filling pick-up unit, be intended to solve prior art naked battery core injecting electrolytic solution detection efficiency low, the problem that cost is high.
The present invention realizes like this, a kind of battery liquid-filling pick-up unit, comprise the liquid holding dish for splendid attire electrolytic solution, Weight acquisition device for gravimetry, for coordinate accommodating naked battery core and this naked battery core is supported in accommodating cylinder above the described liquid level of electrolyte in described liquid holding dish, be used for the described accommodating cylinder that extracts in air prevent the described electrolytic solution in described accommodating cylinder from entering ventilated membrane in described vacuum sucking mechanism with the vacuum sucking mechanism and being used for making described electrolytic solution and fill this accommodating cylinder; Described liquid holding dish is placed on described Weight acquisition device, the lower end of described accommodating cylinder has liquid sucting port, under described liquid sucting port stretches into the liquid level of the described electrolytic solution in described liquid holding dish, the upper end of described accommodating cylinder has exhausr port, described ventilated membrane covers on described exhausr port, and described exhausr port is connected with described vacuum sucking mechanism.
Further, described Weight acquisition device comprises for the weight sensor of electrolyte weight in liquid holding dish described in the real time measure and the main frame of weight data that measures for the treatment of described weight sensor, and described main frame and described weight sensor are electrical connected; Described liquid holding dish is placed on described weight sensor.
Further, described vacuum sucking mechanism comprises vacuum pump for extracting air and the gas outlet being connected described vacuum pump and described exhausr port.
Further, the fixing snap ring be fixed on by described ventilated membrane on described accommodating cylinder is also comprised.
Further, also comprise the packing washer be located between described gas outlet and described accommodating cylinder, described packing washer is around described exhausr port.
Further, the bracing frame be supported in by described accommodating cylinder on described liquid holding dish is also comprised.
Further, the area of described exhausr port and the proportional range of described accommodating cylinder xsect are 1:4-1:16.
Further, described naked battery core is 1-3mm apart from the altitude range of the liquid level of described electrolytic solution.
Further, the area of the liquid level of electrolytic solution described in described liquid holding dish is at least greater than the cross-sectional area 15 times of described naked battery core.
Naked battery core, by arranging accommodating cylinder, is arranged in accommodating cylinder by the present invention, uses vacuum sucking mechanism to be sucked in accommodating cylinder by electrolytic solution in liquid holding dish, to permeate fluid injection in naked battery core; And pass through the weight of electrolytic solution in Weight acquisition device Real-time Collection liquid holding dish; Thus infiltrating in naked battery core along with electrolysis, in liquid holding dish, the weight of electrolytic solution also can reduce gradually, and after filling electrolytic solution in naked battery core, in liquid holding dish, electrolyte weight is constant; According to the real time data of Weight acquisition device record, determine fluid injection time and the reservoir quantity of this naked battery core, the real-time fluid injection speed of naked battery core can also be determined simultaneously; Efficiency is high, and cost is low.
Another object of the present invention is to provide a kind of battery liquid-filling detection method, comprise the steps:
Weight acquisition device is set, and places liquid holding dish on described Weight acquisition device, in described liquid holding dish, add electrolytic solution; There is provided naked battery core, and naked battery core be arranged in an accommodating cylinder, the lower end of described accommodating cylinder offers liquid sucting port, and the upper end of described accommodating cylinder offers exhausr port, described exhausr port is covered with the ventilated membrane preventing liquid from penetrating from this accommodating cylinder; Vacuum sucking mechanism is provided, and the exhausr port of described vacuum sucking mechanism with described accommodating cylinder is connected;
The liquid sucting port of described accommodating cylinder is stretched in described electrolytic solution, and makes described naked battery core be positioned at the ullage of described electrolytic solution;
Described Weight acquisition device gravimetry is reset;
Start described vacuum sucking mechanism, and measured in real time by described Weight acquisition device and record weight data with record; When described Weight acquisition device weight change is less than 0.001g, stop described vacuum sucking mechanism.
Battery liquid-filling detection method of the present invention, by not only according to the real time data of Weight acquisition device record, determining the fluid injection speed of naked battery core in real time, can also determine fluid injection time and the reservoir quantity of naked battery core, efficiency is high, and cost is low.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of battery liquid-filling pick-up unit that the embodiment of the present invention provides;
Fig. 2 is the detection figure that the battery liquid-filling pick-up unit of Fig. 1 detects different negative pole compacted density naked battery core fluid injection time and reservoir quantity.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, 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, be not intended to limit the present invention.
Refer to Fig. 1, a kind of battery liquid-filling pick-up unit 100 that the embodiment of the present invention provides, comprise liquid holding dish 11, Weight acquisition device 12, accommodating cylinder 13, vacuum sucking mechanism 15 and ventilated membrane 14; Liquid holding dish 11 for splendid attire electrolytic solution 31, to infiltrate in naked battery core 21; Liquid holding dish 11 is placed on Weight acquisition device 12, so that Weight acquisition device 12 measures the weight of electrolytic solution 31 in liquid holding dish 11; Naked battery core 21 for coordinating accommodating naked battery core 21, and is supported in electrolytic solution 31 ullage in liquid holding dish 11 by accommodating cylinder 13; The lower end of accommodating cylinder 13 has liquid sucting port 131, and under liquid sucting port 131 stretches into the liquid level of the electrolytic solution 31 in liquid holding dish 11, so that electrolytic solution 31 can enter in accommodating cylinder 13 through liquid sucting port 131, and then naked battery core 21 is injected in infiltration; The upper end of accommodating cylinder 13 has exhausr port 132, and exhausr port 132 is connected with vacuum sucking mechanism 15, air in the accommodating cylinder 13 extracted by vacuum sucking mechanism 15, thus sucks in accommodating cylinder 13 by electrolytic solution 31 in liquid holding dish 11; Ventilated membrane 14 covers on exhausr port 132, ventilated membrane 14 enters in vacuum sucking mechanism 15 for preventing the electrolytic solution 31 in accommodating cylinder 13, ventilated membrane 14 only can make air permeable and can prevent penetration by liquid, namely when vacuum sucking mechanism 15 extracts air in accommodating cylinder 13, electrolytic solution 31 enters in accommodating cylinder 13 through liquid sucting port 131, when and ventilated membrane 14 can prevent electrolytic solution 31 from entering vacuum sucking mechanism 15 from exhausr port 132, to ensure that in liquid holding dish 11, electrolytic solution 31 is only absorbed by naked battery core 21.Ventilated membrane 14 is films of ventilative not saturating electrolytic solution 31, can be high-density non-woven fabrics, (to PTFE film PTFE film take teflon as raw material, adopt special process, through rolling, extruding, the capillary film that makes of the method such as two-way stretch), GasVesicle (gas vesicle) in the biology such as blue-green algae or multilayer complex films.
The use procedure of this battery liquid-filling pick-up unit 100 is as follows:
Naked battery core 21 to be detected is arranged in accommodating cylinder 13, ventilated membrane 14 is covered on the exhausr port 132 of accommodating cylinder 13, more accommodating cylinder 13 is connected with vacuum sucking mechanism 15, exhausr port 132 is connected with vacuum sucking mechanism 15.Filling electrolyte 31 in liquid holding dish 11, is placed in liquid holding dish 11 on Weight acquisition device 12, leaves standstill and waits electrolytic solution 31 liquid level in liquid holding dish 11 tranquil; Again accommodating cylinder 13 is placed in above liquid holding dish 11, makes the liquid sucting port 131 of accommodating cylinder 13 stretch in electrolytic solution 31, make naked battery core 21 be positioned at electrolytic solution 31 ullage simultaneously, to prevent electrolytic solution 31 before measuring from entering in naked battery core 21, and the accuracy that impact detects.The collection weight of Weight acquisition device 12 reset, then the weight data that Weight acquisition device 12 gathers is only the data that electrolytic solution 31 changes.Start vacuum sucking mechanism 15, and measurement and record record weight data in real time by Weight acquisition device 12; When Weight acquisition device 12 weight change is less than 0.001g, stop described vacuum sucking mechanism 15.The data that namely can gather according to Weight acquisition device 12 determine to detect fluid injection time of naked battery core 21, fluid injection speed and reservoir quantity.
By arranging accommodating cylinder 13, naked battery core 21 being arranged in accommodating cylinder 13, using vacuum sucking mechanism 15 to be sucked in accommodating cylinder 13 by electrolytic solution 31 in liquid holding dish 11, to permeate fluid injection in naked battery core 21; And pass through the weight of electrolytic solution 31 in Weight acquisition device 12 Real-time Collection liquid holding dish 11; Thus infiltrate in naked battery core 21 along with electrolysis, in liquid holding dish 11, the weight of electrolytic solution 31 also can reduce gradually, and after filling electrolytic solution 31 in naked battery core 21, in liquid holding dish 11, electrolytic solution 31 weight is constant; According to the real time data that Weight acquisition device 12 records, determine fluid injection time and the reservoir quantity of this naked battery core 21, the real-time fluid injection speed of naked battery core 21 can also be determined simultaneously; Efficiency is high, and cost is low.Battery can be rectangular battery, also can be cylindrical battery.
Further, Weight acquisition device 12 comprises weight sensor 121 and main frame 122; Main frame 122 and weight sensor 121 are electrical connected; Liquid holding dish 11 is placed on weight sensor 121.Weight sensor 121 is for electrolytic solution 31 weight in the real time measure liquid holding dish 11, the weight data that main frame 122 measures for the treatment of weight sensor 121, the data that can be recorded by weight sensor 121 by main frame 122 carry out drawing, adding up, and also can draw figure electrolytic solution 31 weight-time variation diagram by main frame 122.
Further, the precision of weight sensor 121 is 0.001g or more than 0.001g, namely weight sensor 121 be at least 0.001g several times.Weight sensor 121 can be resistance-strain type, also can be that other can reach the sensor of this precision.To ensure the accuracy measured.
Further, vacuum sucking mechanism 15 comprise for extracting air vacuum pump 151 and be connected the gas outlet 152 of vacuum pump 151 and exhausr port 132, namely by gas outlet 152, vacuum pump 151 is connected with accommodating cylinder 13, and the exhausr port 132 of accommodating cylinder 13 is connected with gas outlet 152.Gas outlet 152 can use flexible pipe, settles vacuum pump 151 to facilitate.Use vacuum pump 151 can Automatic Extraction air.Also pump bowl can be used in other embodiments to extract air in accommodating cylinder 13.
Further, in the present embodiment, this battery liquid-filling pick-up unit 100 also comprises the fixing snap ring 16 be fixed on by ventilated membrane 14 on accommodating cylinder 13.Use fixing snap ring 16 to be fixed on by ventilated membrane 14 on accommodating cylinder 13, to make ventilated membrane 14 cover on the exhausr port 132 of accommodating cylinder 13, structure is simple, easy for installation, firm.Also ventilated membrane 14 directly can be bonded on accommodating cylinder 13 in other embodiments.In the present embodiment, while using fixing snap ring 16 to be arranged on by ventilated membrane 14 on accommodating cylinder 13, gas outlet 152 can also be stuck on accommodating cylinder 13, to ensure the connection that gas outlet 152 and accommodating cylinder 13 are good.
Further, this battery liquid-filling pick-up unit 100 also comprises the packing washer 17 be located between gas outlet 152 and accommodating cylinder 13, and packing washer 17 is around exhausr port 132.Packing washer 17 is set between gas outlet 152 and accommodating cylinder 13, with better, the junction of gas outlet 152 with accommodating cylinder 13 is sealed, better to extract the air in accommodating cylinder 13.
In the present embodiment, by fixing snap ring 16, gas outlet 152 is fixed on accommodating cylinder 13, packing washer 17 is located in fixing snap ring 16, thus when fixing snap ring 16 fixes gas outlet 152, can crush seal packing ring 17, the junction of gas outlet 152 with accommodating cylinder 13 can better be sealed to make packing washer 17.Ventilated membrane 14 need slightly larger than the xsect of accommodating cylinder 13, during installation, covered on the exhausr port 132 of accommodating cylinder 13, ventilated membrane 14 is loaded packing washer 17, gas outlet 152 is enclosed within packing washer 17, then gas outlet 152 is fixed on accommodating cylinder 13 by fixing snap ring 16.
Further, this battery liquid-filling pick-up unit 100 also comprises the bracing frame 18 be supported in by accommodating cylinder 13 on liquid holding dish 11.Use bracing frame 18 to support accommodating cylinder 13, to save manpower, use more convenient.In the present embodiment, bracing frame 18 comprises supporting seat 181 and support bar 182, and one end of support bar 182 is fixed on supporting seat 181, and the other end is connected with accommodating cylinder 13, thus supports accommodating cylinder 13.Support bar 182 can be fixedly linked by clamp 183 and accommodating cylinder 13, with for convenience detach.Also support bar 182 and accommodating cylinder 13 can be fixedly linked by spring clamp, or by rope band, support bar 182 and accommodating cylinder 13 be fixedly linked.In other embodiments, also accommodating cylinder 13 directly can be fixed on liquid holding dish 11.
Further, in liquid holding dish 11, the area of the liquid level of electrolytic solution 31 is at least greater than the cross-sectional area 15 times of naked battery core 21.So that electrolytic solution 31, entering in accommodating cylinder 13 in naked battery core 21 during fluid injection, can make the liquid level of electrolytic solution 31 only slightly change, namely prevent the level change of electrolytic solution 31 excessive, and affect Weight acquisition device 12 collection accuracy.Liquid holding dish 11 need be electrolyte resistance 31 corrode stainless steel or polytetrafluoroethylmaterial material make.
Further, the area of exhausr port 132 and the proportional range of accommodating cylinder 13 xsect are 1:4-1:16.To discharge air in accommodating cylinder 13 fast, and then to make electrolytic solution 31 can enter in accommodating cylinder 13 fast, to test fast.Exhausr port 132 can be the opening being arranged on accommodating cylinder 13 upper end, also can be multiple opening composition.Accommodating cylinder 13 needs to use the stainless steel of electrolyte resistance 31 corrosion or polytetrafluoroethylmaterial material to make.Preferably use box hat structure, when vacuum sucking mechanism 15 aspirates air in accommodating cylinder 13, to keep the shape invariance of accommodating cylinder 13.
Further, in order to prevent naked battery core 21 from dropping from accommodating cylinder 13, the lower end of accommodating cylinder 13 is also inwardly provided with portion's of tightening (not marking in figure), to be supported naked battery core 21 by the portion of tightening.In further embodiments, also card convex can be set in accommodating cylinder 13, support naked battery core 21 by card convex, and then prevent naked battery core 21 from dropping.
Further, naked battery core 21 is 1-3mm apart from the altitude range of the liquid level of electrolytic solution 31.Making naked battery core 21 apart from the liquid level scope of electrolytic solution 31 is 1-3mm, can make relatively small and exquisite by accommodating cylinder 13, to reduce costs, and make Weight acquisition more accurate; Meanwhile, when extracting air in accommodating cylinder 13, electrolytic solution 31 can be made to inject naked battery core 21 more stably, the liquid level of electrolytic solution 31 is only slightly changed, namely preventing the level change of electrolytic solution 31 excessive, and affect Weight acquisition device 12 collection accuracy.Preferably, naked battery core 21 apart from the liquid level 1mm of electrolytic solution 31, to make the level change of electrolytic solution 31 slight as far as possible.
Further, the liquid sucting port 131 of accommodating cylinder 13 need stretch into electrolytic solution 311-3mm, to ensure that in liquid holding dish 11, electrolytic solution 31 liquid level can not drop down onto liquid sucting port less than 131 when electrolytic solution 31 is inhaled in accommodating cylinder 13.
Refer to Fig. 1, the embodiment of the present invention also provides a kind of battery liquid-filling detection method, comprises the steps:
Weight acquisition device 12 is set, and places liquid holding dish 11 on Weight acquisition device 12, in liquid holding dish 11, add electrolytic solution 31; Naked battery core 21 is provided, and naked battery core 21 is arranged in an accommodating cylinder 13, the lower end of accommodating cylinder 13 offers liquid sucting port 131, and the upper end of accommodating cylinder 13 offers exhausr port 132, exhausr port 132 is covered with the ventilated membrane 14 preventing liquid from penetrating from this accommodating cylinder 13; Vacuum sucking mechanism 15 is provided, and the exhausr port 132 of vacuum sucking mechanism 15 with accommodating cylinder 13 is connected;
The liquid sucting port 131 of accommodating cylinder 13 is stretched in electrolytic solution 31, and makes naked battery core 21 be positioned at the ullage of electrolytic solution 31;
Weight acquisition device 12 gravimetry is reset;
Start vacuum sucking mechanism 15, and measurement and record record weight data in real time by Weight acquisition device 12; When Weight acquisition device 12 weight change is less than 0.001g, stop vacuum sucking mechanism 15.
By the real time data that not only can record according to Weight acquisition device 12, determine the fluid injection speed of naked battery core 21 in real time, can also determine fluid injection time and the reservoir quantity of naked battery core 21, efficiency is high, and cost is low.The method can use the battery liquid-filling pick-up unit 100 of above-described embodiment to implement to realize.
Refer to Fig. 1, the present invention uses above-mentioned battery liquid-filling pick-up unit 100, and carry out battery liquid-filling quantitative determination experiment by described battery liquid-filling detection method, and contrast with existing battery liquid-filling quantitative determination experimental program, measuring naked battery core 21 negative pole compacted density is 1.65, barrier film is thickness 20um, and barrier film is porosity 38%, and described note electrolytic solution 31 key component is EC (ethylene carbonate), DCM (dimethyl carbonate) and EA (methyl ethyl carbonate).
Battery liquid-filling quantitative determination is tested
Table is tested from above-mentioned battery liquid-filling quantitative determination, above-mentioned battery liquid-filling pick-up unit 100 is used only to need the reservoir quantity of the naked battery core 21 of the battery measuring multiple design, namely can determine the reservoir quantity of the battery core designed according to mean value, and reservoir quantity measures accurately, precision is high.
Battery liquid-filling quantitative determination comparative example
From above-mentioned battery liquid-filling quantitative determination comparative example table, prior art measures battery liquid-filling amount, for first determining the scope that reservoir quantity is possible, designs the naked battery core of many groups, and often group arranges multiple naked battery core and carries out fluid injection respectively, to observe naked battery core infiltration situation in each group.As arranged 40 naked battery cores in this table, being equally divided into four groups, respectively 4.8g, 5.0g, 5.2g and 5.4g electrolytic solution being injected respectively to each naked battery core in four groups.To observe and record in each group electrolyte permeability situation in naked battery core respectively.As above, in table, inject one group of 10 naked battery core of 4.8g electrolytic solution, 10 is all drying regime, thus determines that the reservoir quantity of this kind of battery is greater than 4.8g.In like manner, when the one group of 10 naked battery core injecting 5.0g electrolytic solution is all drying regime, then the reservoir quantity of this kind of battery is greater than 5.0g.When injecting one group of 10 naked battery core of 5.2g electrolytic solution, only have 7 for drying regime, separately have 3 for slight non-sepage, namely have 3 light percolation to go out electrolytic solution, then the reservoir quantity of this kind of battery is at about 5.2g.When injecting one group of 10 naked battery core of 5.4g electrolytic solution, 10 are non-sepage state, and namely 10 naked battery cores of this group all penetrate electrolytic solution, then the reservoir quantity of this kind of battery is less than about 5.4g.Thus show that this battery liquid-filling amount is between 5.0-5.2g, gets intermediate value 5.1g.
Show from above-mentioned two and analyze, the battery liquid-filling amount that battery liquid-filling pick-up unit 100 of the present invention and battery liquid-filling detection method measure is more accurate, and the experiment that needs carry out is less, and efficiency is higher, and use naked battery core 21 less, cost is lower.
Refer to Fig. 1 and Fig. 2, the present invention uses above-mentioned battery liquid-filling pick-up unit 100, and reservoir quantity and the fluid injection timing experiment of the naked battery core 21 of different negative pole compacted density is carried out by described battery liquid-filling detection method, and contrast with existing naked battery core 21 fluid injection timing experimental program, measuring naked battery core 21 barrier film is thickness 20um, barrier film is porosity 38%, and described note electrolytic solution 31 key component is EC (ethylene carbonate), DCM (dimethyl carbonate) and EA (methyl ethyl carbonate).The three groups of naked battery core 21 negative pole compacted densities measured are respectively 1.58,1.65 and 1.72.
In Fig. 2: horizontal ordinate is the time, unit is second; Ordinate is the weight that electrolytic solution reduces, and namely protects liquid weight, directly reflects the amount injecting naked battery core 21 electrolytic solution; Line PD1.58 represents that negative pole compacted density is the fluid injection curve of the naked battery core 21 of 1.58, and line PD1.65 represents that negative pole compacted density is the fluid injection curve of the naked battery core 21 of 1.65, and line PD1.72 represents that negative pole compacted density is the fluid injection curve of the naked battery core 21 of 1.72; Directly can be determined the fluid injection time of the naked battery core 21 of different negative pole compacted density, reservoir quantity and fluid injection speed by Fig. 2, and in figure, each fluid injection slope of a curve is larger, sepage speed is faster.Electrolyte content reduces more, and the electrolysis recoverable amount of this design battery is more, and namely the reservoir quantity of this design battery is more.And obtain following table:
Naked battery core fluid injection time and reservoir quantity
| Sample | Negative pole compacted density | Sepage time/s | Protect liquid weight/g |
| Design 1 | 1.58 | 325 | 5.101 |
| Design 2 | 1.65 | 415 | 5.1 |
| Design 3 | 1.72 | 470 | 5.098 |
From this naked battery core fluid injection time and fluid injection scale, negative pole compacted density is the fluid injection time of the naked battery core of 1.58 is 325s, and corresponding battery liquid-filling amount is 5.101g; Negative pole compacted density is the fluid injection time of the naked battery core of 1.65 is 415s, and corresponding battery liquid-filling amount is 5.1g; Negative pole compacted density is the fluid injection time of the naked battery core of 1.72 is 470s, and corresponding battery liquid-filling amount is 5.098g.
Naked battery core fluid injection time and reservoir quantity comparative example
From above-mentioned naked battery core fluid injection time and reservoir quantity comparative example table, prior art measures the different negative pole compacted density naked battery core fluid injection time, for the naked battery core of each negative pole compacted density is designed many groups, filling machine is used to carry out injection electrolytic solution respectively to each group of naked battery core, set the fluid injection time of each group respectively, according to the state of the naked battery core that the different fluid injection time produces, do not judge the fluid injection time.If whole non-sepage in certain group, then illustrate that the fluid injection time is greater than the fluid injection time of this group setting; If there is not non-sepage in certain group, i.e. all sepages, then illustrate that the fluid injection time is less than the fluid injection time being greater than the setting of this group; If the slight non-sepage of great majority in certain group, then think that the fluid injection time is the fluid injection time that this group sets.Namely the naked battery core being 1.65 for negative pole compacted density in upper table illustrates: design 6 groups, often organizes 10 naked battery cores, and the fluid injection time that filling machine is often organized in setting is 300s, 350s, 400s, 450s and 500s; When to arrange the fluid injection time be 300s and 350s, whole non-sepage in 10 naked battery cores, illustrates that this naked battery core fluid injection time is greater than 350s; When to arrange the fluid injection time be 400s, there be 8 in 10 naked battery cores for slight non-sepage, illustrate that this naked battery core fluid injection time is similar to 400s; To arrange the fluid injection time be 450s and fluid injection time be 500s time, having 0 non-sepage in 10 naked battery cores, is all namely sepage state, illustrates that this naked battery core fluid injection time is less than 450s; Thus get approximate value draw this negative pole compacted density be 1.65 the naked battery core fluid injection time be 400s.Another two comparative experiments and this experiment similar analysis, no longer burdensome at this.
From Fig. 2, above-mentioned two tables and analyze, battery liquid-filling pick-up unit 100 of the present invention and battery liquid-filling detection method can the fluid injection speed of battery of the real time measure; Accurately can not go out battery liquid-filling amount and fluid injection time, also more accurate, the experiment that needs carry out is less, and efficiency is higher, and use naked battery core 21 less, cost is lower.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a battery liquid-filling pick-up unit, it is characterized in that, comprise the liquid holding dish for splendid attire electrolytic solution, Weight acquisition device for gravimetry, for coordinate accommodating naked battery core and this naked battery core is supported in accommodating cylinder above the described liquid level of electrolyte in described liquid holding dish, be used for the described accommodating cylinder that extracts in air prevent the described electrolytic solution in described accommodating cylinder from entering ventilated membrane in described vacuum sucking mechanism with the vacuum sucking mechanism and being used for making described electrolytic solution and fill this accommodating cylinder; Described liquid holding dish is placed on described Weight acquisition device, the lower end of described accommodating cylinder has liquid sucting port, under described liquid sucting port stretches into the liquid level of the described electrolytic solution in described liquid holding dish, the upper end of described accommodating cylinder has exhausr port, described ventilated membrane covers on described exhausr port, and described exhausr port is connected with described vacuum sucking mechanism.
2. battery liquid-filling pick-up unit as claimed in claim 1, it is characterized in that, described Weight acquisition device comprises for the weight sensor of electrolyte weight in liquid holding dish described in the real time measure and the main frame of weight data that measures for the treatment of described weight sensor, and described main frame and described weight sensor are electrical connected; Described liquid holding dish is placed on described weight sensor.
3. battery liquid-filling pick-up unit as claimed in claim 1, is characterized in that, described vacuum sucking mechanism comprises vacuum pump for extracting air and the gas outlet being connected described vacuum pump and described exhausr port.
4. battery liquid-filling pick-up unit as claimed in claim 3, is characterized in that, also comprises the fixing snap ring be fixed on by described ventilated membrane on described accommodating cylinder.
5. battery liquid-filling pick-up unit as claimed in claim 3, it is characterized in that, also comprise the packing washer be located between described gas outlet and described accommodating cylinder, described packing washer is around described exhausr port.
6. the battery liquid-filling pick-up unit as described in any one of claim 1-5, is characterized in that, also comprises the bracing frame be supported in by described accommodating cylinder on described liquid holding dish.
7. the battery liquid-filling pick-up unit as described in any one of claim 1-5, is characterized in that, the area of described exhausr port and the proportional range of described accommodating cylinder xsect are 1:4-1:16.
8. the battery liquid-filling pick-up unit as described in any one of claim 1-5, is characterized in that, described naked battery core is 1-3mm apart from the altitude range of the liquid level of described electrolytic solution.
9. the battery liquid-filling pick-up unit as described in any one of claim 1-5, is characterized in that, the area of the liquid level of electrolytic solution described in described liquid holding dish is at least greater than the cross-sectional area 15 times of described naked battery core.
10. a battery liquid-filling detection method, is characterized in that, comprises the steps:
Weight acquisition device is set, and places liquid holding dish on described Weight acquisition device, in described liquid holding dish, add electrolytic solution; There is provided naked battery core, and naked battery core be arranged in an accommodating cylinder, the lower end of described accommodating cylinder offers liquid sucting port, and the upper end of described accommodating cylinder offers exhausr port, described exhausr port is covered with the ventilated membrane preventing liquid from penetrating from this accommodating cylinder; Vacuum sucking mechanism is provided, and the exhausr port of described vacuum sucking mechanism with described accommodating cylinder is connected;
The liquid sucting port of described accommodating cylinder is stretched in described electrolytic solution, and makes described naked battery core be positioned at the ullage of described electrolytic solution;
Described Weight acquisition device gravimetry is reset;
Start described vacuum sucking mechanism, and measured in real time by described Weight acquisition device and record weight data with record; When described Weight acquisition device weight change is less than 0.001g, stop described vacuum sucking mechanism.
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| CN106784592A (en) * | 2017-01-25 | 2017-05-31 | 天津清源电动车辆有限责任公司 | A kind of soft-package battery liquid injection system and electrolyte filling method |
| CN108152751A (en) * | 2017-12-29 | 2018-06-12 | 山东精工电子科技有限公司 | A kind of lithium ion battery cell liquid absorption amount test device and method |
| CN108387478A (en) * | 2017-05-18 | 2018-08-10 | 惠州市宙邦化工有限公司 | A kind of imbibition test method and device |
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