CN102110802B - Method for injecting electrolyte into shell of battery - Google Patents
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- CN102110802B CN102110802B CN2011100312813A CN201110031281A CN102110802B CN 102110802 B CN102110802 B CN 102110802B CN 2011100312813 A CN2011100312813 A CN 2011100312813A CN 201110031281 A CN201110031281 A CN 201110031281A CN 102110802 B CN102110802 B CN 102110802B
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Abstract
The invention relates to a method for injecting electrolyte into a shell of a battery. The battery is a lithium-iron disulfide battery; the shell is provided with an open end and a closed end; and the inner side of the closed end is provided with a battery cell. The method comprises a first electrolyte injection step, wherein the electrolyte is injected into the shell through the open end, and then the shell is rotated around a vertical rotating shaft in a mode that the open end is inward and close to the rotating shaft, the closed end is outward and far away from the rotating shaft, and the open end is higher than the closed end. The electrolyte is injected into the shell of the battery by centrifugal force, so that the electrolyte is fully absorbed on the battery cell and electrode sheets, and the set discharge capacity of the battery can be realized to the greatest extent under a large-current discharge condition, and the injection time of the electrolyte can be remarkably shortened simultaneously, so that the production efficiency of the battery is greatly improved.
Description
Technical field
The present invention relates to the disposable lithium-battery field, particularly relate to the method for injecting electrolyte in the battery container, relate more specifically in the battery of lithium-iron disulphide housing, inject the method for electrolyte.
Background technology
Battery has become the necessity in people's life as a kind of small and exquisite easily portable power source.Particularly lithium battery owing to it has the voltage platform height, specific discharge capacity is high, the life-span is long, volume gently reaches the advantages such as pollution-free, has become the leading products of Battery Market at present.
In lithium battery, battery of lithium-iron disulphide is a kind of with FeS
2For positive electrode active materials, take metal Li as negative active core-shell material and the disposable lithium-battery take organic electrolyte as electrolyte, its operating voltage can reach 1.5V.Compare with alkaline battery, therefore the advantages such as battery of lithium-iron disulphide has the specific discharge capacity height, power output is large, cryogenic property good, storage life is long and lightweight have been widely used in the mobile electronic devices such as notebook computer, video camera, digital camera.
Yet, the performance of battery of lithium-iron disulphide is at present also not fully up to expectations, particularly, in the situation that adopts heavy-current discharge, cell voltage reduces rapidly, cell voltage is reduced to below the cut-ff voltage prematurely, and battery can't be kept daily available voltage for a long time, and then causes its theoretical discharge capacity can't all realize when reality is used.
At present, the main discharge capacity that improves battery by design and structure and the optimization positive electrode active materials etc. of improvement battery.But because very active as the metal Li of battery of lithium-iron disulphide negative active core-shell material; belong to danger; the industry rule defines the maximum use amount of single battery; generally speaking; the metal Li of single AA type battery can not surpass 1 gram, and this has made restriction with regard to the heap(ed) capacity of giving battery of lithium-iron disulphide.
The task of electrolyte in battery mainly is to transmit electric charge by the migration of ion, thereby realize the normal operation of battery, particularly in the situation of heavy-current discharge, inside battery needs a large amount of electrolyte that enough ions are provided, to carry out charge transfer between battery plus-negative plate.And according to existing electrolyte method for implanting, the injection rate of electrolyte is few, and is difficult to fully be absorbed in battery core and electrode slice, therefore greatly reduces the actual discharge capacity of battery; In addition, because the viscosity of electrolyte is larger, the injection rate of electrolyte is restricted, and causes injection length to prolong.
In order to improve the injection rate of electrolyte, someone proposes in (as being heated to 40-60 ℃) battery container that reinjects after the organic electrolyte heating, with viscosity and the surface tension of reduction electrolyte, thereby the flowability of enhancing electrolyte promotes its absorption on battery core.But because organic electrolyte is volatile, the electrolyte actual constituent that often causes injecting battery changes, and needs seal operation, also will carry out heat treated, complex operation to pipeline and the battery container of electrolyte process.
Therefore, need at present a kind of method for implanting of battery of lithium-iron disulphide electrolyte badly, the method should be able to allow electrolyte fully absorb on battery core and electrode slice at short notice, increase the injection rate of electrolyte, thereby make battery as much as possible under the heavy-current discharge condition, can keep for a long time the discharge voltage of certain level, realize the discharge capacity that it is set.
Summary of the invention
Introduced the concept of a series of reduced forms in the summary of the invention part, this will further describe in the embodiment part.Summary of the invention part of the present invention does not also mean that key feature and the essential features that will attempt to limit technical scheme required for protection, does not more mean that the protection range of attempting to determine technical scheme required for protection.
Based on above-mentioned technical problem, the invention provides a kind of electrolyte method for implanting that can allow electrolyte on battery core and electrode slice, fully absorb in the short time.Specifically, the inventor adopts a kind of centrifugal force that utilizes to inject the method for electrolyte in battery container, thereby has finished the present invention.
The present inventor finds after deliberation, in the situation of heavy-current discharge, owing to produce the polarization phenomena that comprise electrochemical polarization and concentration polarization in the battery, cause cell voltage to reduce rapidly, cell voltage is reduced to below the cut-ff voltage prematurely, and in fact still there are a large amount of active materials that do not consume in inside battery.Wherein, electrochemical polarization often depends on the active material of electrode and the situation at electrode reaction interface, and namely active material obtains or lose the complexity of electronics at its electrode interface.Usually, can eliminate by structure and the performance of improving the solid electrolyte interface film, for example process by pre-arcing, perhaps add the additive that improves the solid electrolyte interface film at inside battery and realize.
In the battery of lithium-iron disulphide because the existence of metal Li, limited the use of aqueous electrolyte, and compare with aqueous electrolyte, the conductivity of organic electrolyte is very low, the degree of dissociation of the lithium salts that is dissolved in organic solvent is restricted, thereby do not provide the ion of enough free migrations, in addition, but the deficiency of the concentration of the viscosity of electrolyte, lithium salts etc. also causes the amount of ions of free migration not enough.Therefore, battery of lithium-iron disulphide is in the situation of heavy-current discharge, and the concentration polarization of battery often becomes leading factor.
In the manufacturing process of battery of lithium-iron disulphide, active material FeS
2Being coated on two sides of metal aluminum foil with graphite, acetylene black and binding agent etc., forming positive plate, is to reduce contact resistance, and positive plate need to pass through roll-in, so just causes electrolyte to be difficult to be penetrated in the micro-pore of pole piece, and moistening electrode surface only.In addition, reeling after the battery core of lithium battery is generally superposeed successively by positive plate, barrier film, negative plate and barrier film forms again, and contacting closely, battery core causes difficulty to interpolation and the absorption of electrolyte equally.Adopt commonsense method to add electrolyte, battery core central authorities or electrode mid portion often do not have electrolyte or seldom, the ion diffusion velocity is slow, cause in heavy-current discharge situation lower electrode surface and electrolyte bulk concentration variant, produce concentration polarization, cell voltage is reduced rapidly, greatly reduce the capacity of battery.
Thus, the present inventor is through unremitting effort, finally find, utilize centrifugal force in battery container, to inject electrolyte, electrolyte is absorbed fully in battery core and electrode slice, increase the injection rate of electrolyte, eliminate the concentration polarization of battery, and can shorten the injection length of electrolyte, thereby solved above-mentioned technical problem.
Specifically, the invention provides a kind of method of injecting electrolyte in the housing of battery, described battery is battery of lithium-iron disulphide, described housing has openend and blind end, the inboard of described blind end is provided with battery core, described method comprises the first fluid injection step, wherein, in described housing, inject described electrolyte via described openend, described housing is rotated around vertical rotating shaft in the following manner: described openend is inwardly and near described rotating shaft, described blind end is outwardly and away from described rotating shaft, and described openend is higher than described blind end.
In the preferred case, when carrying out described rotation, the central shaft of described housing and horizontal direction are kept greater than 0 and less than or equal to 45 angle.
Preferably, when carrying out described rotation, the rotary speed of described housing is 500-5000 rev/min.
Preferably, the time of described rotation is 0.5-10 minute.
Preferably, after described the first fluid injection step, described method also comprises the second fluid injection step, wherein, supplies described electrolyte by the mode that instils in described housing.
In the preferred case, described electrolyte is the organic electrolyte that contains electrolyte lithium salt and organic solvent.
The present invention can make electrolyte reach on the electrode slice that wherein comprises in battery core and fully absorb by said method, has greatly increased and has injected the amount of the electrolyte of inside battery, thereby can eliminate the polarization phenomena of battery.Therefore, battery of the present invention can be realized its set discharge capacity as much as possible under the heavy-current discharge condition under the prerequisite that does not change battery design and battery structure.On the other hand, use electrolyte filling method of the present invention, can obviously shorten the injection length of electrolyte, greatly improved the production efficiency of battery.
Description of drawings
Following accompanying drawing of the present invention is used for understanding the present invention at this as a part of the present invention.Shown in the drawings of embodiments of the invention and description thereof, be used for explaining principle of the present invention.In the accompanying drawings:
Fig. 1 utilizes centrifuge to inject the schematic diagram of electrolyte
Fig. 2 is the heavy-current discharge performance schematic diagram relatively that adopts the battery that centrifugal liquid filling method (embodiment) and conventional electrolyte filling method (comparative example) make.
Embodiment
In the following description, a large amount of concrete details have been provided in order to more thorough understanding of the invention is provided.Yet, it will be apparent to one skilled in the art that the present invention can need not one or more these details and implemented.In other example, for fear of obscuring with the present invention, be not described for technical characterictics more well known in the art.
As mentioned above, the invention provides a kind of method of injecting electrolyte in the housing of battery, described battery is battery of lithium-iron disulphide, described housing has openend and blind end, the inboard of described blind end is provided with battery core, described method comprises the first fluid injection step, wherein, in described housing, inject described electrolyte via described openend, described housing is rotated around vertical rotating shaft in the following manner: described openend is inwardly and near described rotating shaft, described blind end is outwardly and away from described rotating shaft, and described openend is higher than described blind end.
Applying of described centrifugal force can be used known various centrifugal rotation device, and unrestricted, makes centrifugal action in the purpose of electrolyte as long as can reach.For example, the housing that battery core is equipped with in its blind end inboard is fixed on the centrifugal rotation device with rotating shaft, make openend near rotating shaft, blind end is away from rotating shaft, then make this device High Rotation Speed, centrifugal action is being pointed on the direction of blind end from the openend of housing, thereby forcibly make the electrolyte that is positioned at openend from open end side to the blind end side flow, and then make and be arranged in the distolateral battery core of sealing and be immersed in electrolyte.
When applying described centrifugal force, preferably make the openend of described housing be higher than blind end (for example, towards oblique upper), to avoid the rear electrolyte outflow housing that stops the rotation.On the other hand, the central shaft of described housing and horizontal direction are formed greater than 0 and less than or equal to 45 angle, to guarantee that centrifugal force is having enough component from shell nozzle end sensing housings close extreme direction, that is, make along being used for described electrolyte from the shell nozzle end towards the masterpiece of enclosure interior direction.If described angle, then need apply larger centrifugal force (using higher rotary speed) greater than 45, it is distolateral just to make electrolyte flow to fully sealing, is unfavorable for energy-conservation.
When the central shaft of described housing and horizontal direction form greater than 0 and during less than or equal to 45 angle, the speed of described centrifugal rotation is preferably 500-5000 rev/min, and more preferably 1200 rev/mins, to realize sufficient dipping.Simultaneously, the time of described centrifugal rotation is preferably 0.5-10 minute, more preferably 1-3 minute.
Described electrolyte method for implanting also can comprise the second fluid injection step (secondary fluid injection), that is, before sealing, carry out the fluid injection second time, preferably, described the second fluid injection step adopts the mode that instils, and namely supplies described electrolyte by the mode that instils in described housing.In battery of lithium-iron disulphide of the present invention, electrolyte generally adopts and holds volatile organic electrolyte, and be accomplished to battery seal from the first fluid injection step and may need the regular hour, in order to remedy the during this period of time volatilization of electrolyte inside, preferably before battery seal, carry out fluid infusion.But described secondary fluid injection process should not consist of limiting the scope of the invention, because, utilizing the first fluid injection step as long as finish, in the situation of conditions permit, just can seal immediately, to avoid the volatilization of electrolyte; Therefore, in the situation of sealing immediately after the first fluid injection step is finished, method of the present invention can not comprise the second fluid injection step.
As an example of the present invention, as shown in Figure 1, one or more battery containers 101 are placed in the holding tank of centrifuge 102, this holding tank be obliquely installed so that the openend of battery container near the rotating shaft of centrifuge, blind end is away from the rotating shaft of centrifuge; Wherein, all housings all have openend and blind end, and the inboard of blind end is provided with battery core, and openend all up.The battery container openend is connected with electrolyte supply device (not shown), then utilizes this feedway in housing, to inject electrolyte by openend.Subsequently, start centrifuge, make this centrifuge with the direction rotation shown in the R in scheming, in order to utilize centrifugal force to make electrolyte in housing, flow to blind end from openend.
Electrolyte of the present invention can be normally used various organic electrolytes in the battery of lithium-iron disulphide, and in general, described electrolyte contains as electrolytical lithium salts with as the organic solvent of medium.
Described electrolyte lithium salt can for being applicable to the various known lithium salts of battery of lithium-iron disulphide electrolyte, for example can be preferably LiI (lithium iodide), LiClO
4(lithium perchlorate), LiPF
6(lithium hexafluoro phosphate), LiSO
2CF
3Among (trifluoromethyl sulfonic acid lithium), the LiTFSI (two fluoroform sulfimide lithium) etc. one or more.
Described organic solvent can be the existing known various organic solvents that are used for battery of lithium-iron disulphide electrolyte, such as being preferably in PC (propene carbonate), EC (ethylene carbonate), DME (dimethoxy-ethane), DX (dioxolanes), the sulfolane etc. one or more.
Can also comprise other additives in the described electrolyte, for example can be preferably among pyrimidine, the DMI (3,5-dimethyl isoxazole) one or both.
Li/FeS of the present invention
2Battery can adopt common Li/FeS
2Battery structure and material, that is, and with FeS
2For positive electrode active materials, take lithium metal as negative active core-shell material and take above-mentioned organic electrolyte as electrolyte, and with box hat as battery case.
When making battery core, can adopt method well known in the art, for example, and in order to make positive plate, can be with FeS
2Powder and conductive agent (such as graphite, acetylene black etc.) mix, stir to make anode sizing agent with binding agent (such as PTFE (polytetrafluoroethylene), PVDF (Kynoar), SEBS (styrene-ethylene/butylene-styrene block copolymer) etc.), solvent, anode sizing agent evenly is coated on the conductive base (such as metallic foil, wire netting etc.) again, after drying is removed solvent, again certain thickness is arrived in its roll-in, cut into and make the needed size of battery, obtain positive plate, stand-by behind the dry removal moisture.
Positive electrode active materials FeS as battery of the present invention
2, it both can take from Natural pyrite, marcasite, and it is manually synthetic also can to pass through the synthetic methods such as electro-deposition method, hydro thermal method, also can obtain MODIFIED Fe S by various modifications
2Certainly, also can add other positive electrode active materials, together form the positive electrode active materials that is applicable to primary cell of the present invention.
Above-mentioned positive electrode active materials FeS
2Granularity can adopt common FeS as battery active material
2Particle size range commonly used, and unrestricted.
Above-mentioned positive electrode active materials FeS
2Crystal structure can be cubic type, pyritohedron type, octahedral build or other crystal formations, also can be the mixture of above-mentioned various crystal formations.In a word, FeS
2Crystal structure be not particularly limited.
Can add the other materials such as conductive agent (such as graphite, acetylene black etc.) in the anode sizing agent of the present invention.
As the negative active core-shell material of battery of the present invention, can select the alloy foil of metal Li or Li and other metals.
Barrier film as battery of the present invention, micro-porous film be can be, PE (polyethylene), PP (polypropylene) or its combination are generally, typically, can directly use the barrier film of Celgard company, be the barrier film of Celgard2400, Celgard2500 etc. such as model.
As battery container, can use any material.Because the bottom of battery of lithium-iron disulphide is generally as negative pole end, therefore preferred this housing is conductivity, considers that from the angle of robustness and being easy to get property more preferably this housing is the nickel plating Stainless Steel Shell.
Then, can be according to known method, above-mentioned positive plate, barrier film, negative plate and barrier film are superposeed successively and reel and form battery core.Can inject electrolyte according to the method for the invention after this battery core put into battery container.After electrolyte thorough impregnation battery core, can seal, clean this housing by known method, thereby obtain final products, be i.e. Li/ FeS
2Battery.
The Li/FeS that does not contain electrolyte of the present invention
2Battery can also adopt other known preparation methods to make, and its preparation method does not consist of the restriction to protection scope of the present invention.
Embodiment
The present invention is further illustrated by the following examples.It should be noted that these embodiment do not consist of limiting the scope of the invention.
Preparation example
The related battery of the embodiment of the invention is AA type battery, and its preparation method is as follows:
Get FeS
2Powder (picking up from the Natural pyrite of Yunfu, guangdong Province) mixes this material as positive electrode active materials with conductive agent (graphite and acetylene black), make positive mix.With an organic solvent binding agent is made adhesive glue, wherein, binding agent is styrene-ethylene/butylene-styrene block copolymer (SEBS, commodity are called Kraton G1651), organic solvent is the Shell A100 (aromatic hydrocarbon solvent) of Shell company production and the mixture of Shell OMS (isoparaffin), and its mixed proportion is the 4:6(weight ratio).
With above-mentioned positive mix with stir to make slurry after adhesive glue is mixed by the weight ratio of 2:1.In the dry of the anode sizing agent that finally makes, the part by weight of each component is:
FeS
2: 91 % by weight; Graphite: 6 % by weight; Acetylene black: 1 % by weight; The SEBS:2 % by weight.
This slurry is coated on the aluminium foil as anodal conductive base, then the base material after applying is dried, roll-in, cut processing, obtain positive plate, its length is 285mm, and width is 41mm, and thickness is 0.2mm.Use lithium metal as negative plate, its length is 310mm, and width is 39mm, and thickness is 0.16mm; Then, an end of positive and negative electrode lug is connected to forms anode structure and negative pole structure on positive plate and the negative plate respectively; Then, anode structure, negative pole structure and barrier film (Celgard 2400) are superposeed and be wound on and form together the battery interlayer structure of (that is, form " negative pole/barrier film/positive pole/barrier film ... "); At last, battery is put into battery container, stand-by.
Electrolyte to be injected is the organic electrolyte of 1.2g/ml for the LiTFSI (two fluoroform sulfimide lithium) with 20 % by weight is dissolved in the density that forms in the mixed solvent (weight ratio is 4:1) of DOX and sulfolane.
Get 10 battery containers without electrolyte that preparation example obtains, then the weighing battery weight places on the centrifuge shown in Figure 1 symmetrically, makes the battery openend near centrifuge axis (rotating shaft), and blind end is away from the centrifuge axis.Placement direction and the horizontal direction of battery are 30.In housing, supply with above-mentioned organic electrolyte via the openend of housing from the electrolyte supply machine.Then remove the electrolyte supply machine.It is 1200 rev/mins that the centrifuge rotary speed is set, and starts centrifuge, and the duration is 2 minutes, then battery is taken out.
Observe the electrolyte absorbing state of battery and also seal, and then weighing battery weight and calculate the electrolyte weight that every battery injects.Theoretical vacant volume in the AA type battery of lithium-iron disulphide housing is pressed 1.95ml and is calculated, and obtains the fluid injection efficient of electrolyte method for implanting provided by the invention, the results are shown in Table 1.
Comparative example 1
10 battery containers that do not contain electrolyte and the electrolyte that use that preparation example obtains, different is, adopt conventional method to inject electrolyte, namely, use electrolyte supply machine openend from housing under normal pressure to inject electrolyte, until the electrolysis hydrorrhea in the housing is to battery core top, its liquid level is consistent with the liquid level of electrolyte after embodiment 1 fluid injection, and the used time is 30 minutes.Leave standstill 30 minutes after the housing sealing with injection electrolyte, so that it fully absorbs.Calculate the fluid injection efficient of the method, the results are shown in Table 1.
The fluid injection efficient of the conventional electrolyte filling method of table 1 and centrifugal liquid filling method (the present invention) relatively
As can be seen from Table 1, adopt electrolyte method for implanting provided by the invention, average fluid injection efficient can be up to about 95%, apparently higher than the fluid injection efficient (50%) that adopts conventional method, greatly increased and injected the amount of the electrolyte of inside battery, thereby can improve the discharge performance of battery in the heavy-current discharge situation.
In addition, the battery of above-described embodiment 1 and 2 is cut open respectively, observed electrolyte in the infiltration situation of inside battery.Found that in the battery of embodiment 1, electrolyte is even in its pole piece infiltration, and the battery pole piece of comparative example 1 middle part all there is not electrolyte, still keeps dry state.Illustrate and adopt electrolyte method for implanting provided by the invention, can make in the electrolyte short time and obtain good absorption at electrode slice.
Embodiment 2
Present embodiment is used for illustrating the discharge performance by the prepared battery of electrolyte method for implanting provided by the invention.
3 batteries that obtain with embodiment 1 are as mesuring battary.Use MACCOR 2300 cell testers, adopt 1500mW/650mW 2s On/28s Off, the ANSI DCAM mode of 5m/h to 0.9V, be that first pulse reaches 2 seconds at 1500mW, subsequently second pulse reaches 28 seconds at 650mW, and pulse train repeats 10 times, be 55 minutes time of having a rest subsequently, then repetition pulse sequence and time of having a rest to voltage drops to 0.9V, investigates the discharge performance of battery, the results are shown in Table 2.
Comparative example 2
3 batteries that obtain with comparative example 1 are as mesuring battary.Adopt the method identical with embodiment 2 to carry out discharge performance and test, the results are shown in Table 2.
According to above-mentioned discharge performance test result, take pulse number as abscissa, discharge voltage (V) is the ordinate mapping, relatively adopts the discharge performance of the battery that two kinds of different electrolyte filling methods make, as shown in Figure 2.
The discharge performance test result of the battery that two kinds of different electrolyte filling methods of table 2 employing make
From table 2 and Fig. 2, can find out, the battery that adopts electrolyte method for implanting provided by the invention to make, voltage platform is high when heavy-current discharge, and can keep for a long time the discharge voltage of certain level, can obtain desirable actual discharge performance.
The present invention is illustrated by above-described embodiment, but should be understood that, above-described embodiment just is used for for example and the purpose of explanation, but not is intended to the present invention is limited in the described scope of embodiments.It will be appreciated by persons skilled in the art that in addition the present invention is not limited to above-described embodiment, can also make more kinds of variants and modifications according to instruction of the present invention, these variants and modifications all drop in the present invention's scope required for protection.Protection scope of the present invention is defined by the appended claims and equivalent scope thereof.
Claims (6)
1. method of injecting electrolyte in the housing of AA type battery, described battery is battery of lithium-iron disulphide, described housing has openend and blind end, the inboard of described blind end is provided with battery core, described method comprises the first fluid injection step, wherein, in described housing, inject described electrolyte via described openend, described housing is rotated around vertical rotating shaft in the following manner: described openend is inwardly and near described rotating shaft, described blind end is outwardly and away from described rotating shaft, and described openend is higher than described blind end, when carrying out described rotation, make the central shaft of described housing and horizontal direction keep greater than 0 and less than or equal to 45 ° angle, described rotary speed is 1000-1500 rev/min, the time of described rotation is 1-3 minute.
2. the method for claim 1 is characterized in that, after described the first fluid injection step, described method also comprises the second fluid injection step, wherein, supplies described electrolyte by the mode that instils in described housing.
3. method as claimed in claim 1 or 2 is characterized in that, described electrolyte is the organic electrolyte that contains electrolyte lithium salt and organic solvent.
4. method as claimed in claim 3 is characterized in that, described electrolyte lithium salt is one or more in lithium iodide, lithium perchlorate, lithium hexafluoro phosphate, trifluoromethyl sulfonic acid lithium, the two fluoroform sulfimide lithium.
5. method as claimed in claim 3 is characterized in that, described organic solvent is one or more in propene carbonate, ethylene carbonate, dimethoxy-ethane, dioxolanes, the sulfolane.
6. the method for claim 1, described battery core is superposeed successively and reels and formed by positive plate, barrier film, negative plate and barrier film.
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| CN102290558A (en) * | 2011-07-29 | 2011-12-21 | 南京双登科技发展研究院有限公司 | Acid extraction method for miniature lead acid battery |
| CN105655644B (en) * | 2015-12-29 | 2019-01-22 | 东莞新能源科技有限公司 | Lithium ion battery and preparation method thereof |
| CN105742556B (en) * | 2016-04-22 | 2018-09-25 | 浙江昀邦电池有限公司 | A kind of alkaline dry battery electrolyte centrifugal absorption device |
| DE102016225173A1 (en) * | 2016-12-15 | 2018-06-21 | Robert Bosch Gmbh | Method and system for producing a battery cell |
| CN106960981B (en) * | 2017-04-06 | 2019-06-21 | 珠海光宇电池有限公司 | The aging method of battery core |
| CN110048073A (en) * | 2019-04-04 | 2019-07-23 | 惠州市赛能电池有限公司 | A kind of priming device and its fluid injection mode of flexible package lithium cell |
| CN110828766A (en) * | 2019-11-19 | 2020-02-21 | 凌帕新能源科技(上海)有限公司 | Battery cell liquid injection method |
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