CN116067439B - Formation parameter evaluation method, test battery and simulation formation equipment - Google Patents
Formation parameter evaluation method, test battery and simulation formation equipment Download PDFInfo
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- CN116067439B CN116067439B CN202310355476.6A CN202310355476A CN116067439B CN 116067439 B CN116067439 B CN 116067439B CN 202310355476 A CN202310355476 A CN 202310355476A CN 116067439 B CN116067439 B CN 116067439B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4285—Testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Filling, Topping-Up Batteries (AREA)
Abstract
The application relates to a formation parameter evaluation method, a test battery and a simulation formation device, wherein the method comprises the following steps: and introducing gas into the battery to be tested in the simulation forming equipment through a battery gas feeding part on the battery to be tested, and discharging the gas from a liquid injection port of the battery to be tested through a gas extraction channel in the simulation forming equipment. Further, according to the overflow parameters of the electrolyte in the battery to be tested in the gas discharging process, the formation parameters corresponding to the battery to be tested are evaluated. Therefore, in the embodiment of the application, by simulating the physical process of generating gas and exhausting gas in the battery formation process and evaluating the formation parameters corresponding to the battery to be tested according to the overflow parameters of the electrolyte in the battery to be tested in the gas exhaust process, more proper formation parameters can be conveniently selected for the actual battery formation process, so that the performance of the battery and the formation machine is guaranteed, and the production efficiency of the battery is improved.
Description
Technical Field
The application relates to the technical field of battery production, in particular to a formation parameter evaluation method, a test battery and a simulation formation device.
Background
The formation is a key procedure in the lithium battery generation process, and is a process of activating the battery after liquid injection, so that chemical reaction occurs in the battery to form a solid electrolyte interface (solid electrolyte interphase, SEI) film, wherein the quality of the SEI film can influence the working performance of the battery in the charge-discharge cycle process.
In general, a battery with injected liquid is placed in a negative pressure formation machine, and electrodes of the battery are connected by a charging wire to perform a battery formation process. However, some situations may occur during the battery formation process that affect the performance of the battery and the formation machine.
Disclosure of Invention
In view of the above problems, the present application provides a formation parameter evaluation method, a test battery, and a simulation formation apparatus, which can solve the problem that the performance of the battery and the formation machine is affected by the conditions occurring in the formation process of the battery in the related art.
In a first aspect, the present application provides a method for evaluating formation parameters, the method comprising:
introducing gas into the battery to be tested in the simulation formation equipment through a battery gas supply part on the battery to be tested;
exhausting gas from a liquid injection port of the battery to be tested through an air exhaust channel in the simulation forming equipment;
and evaluating formation parameters corresponding to the battery to be tested according to overflow parameters of the electrolyte in the battery to be tested in the gas discharging process, wherein the overflow parameters are used for indicating the overflow condition of the electrolyte in the battery to be tested in the simulation formation process.
In the technical scheme of the embodiment of the application, the gas is introduced into the battery to be tested in the simulation forming equipment through the battery air supply part on the battery to be tested, and the gas is discharged from the liquid injection port of the battery through the air exhaust channel in the simulation forming equipment. Further, according to the overflow parameters of the electrolyte in the battery to be tested in the gas discharging process, the formation parameters corresponding to the battery to be tested are evaluated. Therefore, in the embodiment of the application, by simulating the physical process of generating gas and exhausting gas in the battery formation process, and according to the overflow parameter of the electrolyte in the battery to be tested in the gas exhaust process, the formation parameter corresponding to the battery to be tested can be evaluated, so that more proper formation parameters can be selected for the actual battery formation process, the conditions of electrolyte overflow and/or electrolyte crystallization and the like in the battery formation process can be reduced, and therefore, the performance of the battery and the formation machine can be guaranteed, and the production efficiency of the battery can be improved.
In some embodiments, the overflow parameter comprises a gas flow parameter.
In some embodiments, the gas flow parameter is a parameter measured by a first flow meter disposed on the bleed passage, or,
the gas flow rate parameter is a parameter measured by a second flow meter provided in the battery air supply section.
In some embodiments, the method further comprises:
and determining the cleaning frequency of the air suction channel according to the gas flow parameters.
According to the technical scheme, the air flow parameters are monitored in real time, the cleaning frequency of the air suction channel is determined according to the air flow parameters, and the air suction channel of the simulation forming equipment can be cleaned in time, so that the working performance of the simulation forming equipment is improved.
In some embodiments, the overflow parameter comprises an electrolyte crystallization weight parameter.
In some embodiments, the liquid filling port of the battery to be tested is connected with the air suction channel through the suction nozzle, and the electrolyte crystallization weight parameter is a parameter measured according to the weight change of the suction nozzle.
In some embodiments, the formation parameters include at least one of: negative pressure parameters of the air suction channel, temperature parameters in the simulation forming equipment and electrolyte quantity parameters in the battery to be tested.
In a second aspect, the present application provides a test battery, which is applicable to the formation parameter evaluation method provided in the first aspect, where the test battery includes a battery body, a battery air supply portion located on the battery body, and a liquid filling port, and the battery air supply portion and the liquid filling port are mutually communicated.
In the technical scheme of this embodiment, through being provided with the battery air feed portion and the notes liquid mouth of mutual intercommunication on the battery body to under the condition that the test battery was set up in the simulation formation equipment, the inside gas of entering the test battery by battery air feed portion can flow to notes liquid mouth, thereby can simulate the process that produces gas and exhaust gas in the battery formation process.
In some embodiments, the battery plenum is disposed at the bottom of the battery body so that gas can flow from the bottom of the test battery to the top of the fill port, thereby simulating the process of generating and exhausting gas during battery formation.
In some embodiments, the battery plenum includes: and the control part is used for controlling the gas entering the test battery from the gas inlet.
In some embodiments, the control portion includes any one of the following:
a check valve provided at the air supply port;
a throttle valve provided to the air feed port;
a one-way throttle valve provided to the air supply port;
a check valve and a throttle valve arranged at the air supply port.
In the technical scheme of the embodiment of the application, the control part can control the flowing direction of the gas and/or the gas flow so as to simulate the battery formation process under different conditions more accurately.
In a third aspect, the present application provides a simulation forming apparatus, wherein the simulation forming apparatus includes: the device comprises an air source, a box body and a ventilation part positioned on the box body, wherein one end of the ventilation part is connected with the air source, and the other end of the ventilation part is used for being connected with a battery air supply part of a battery to be tested positioned in the simulation forming equipment and used for providing gas for the battery to be tested.
In the technical scheme of the embodiment of the application, one end of the ventilation part located on the box body is connected with the air source, and the other end of the ventilation part is connected with the battery air supply part of the battery to be tested located in the simulation formation equipment, so that gas is provided for the battery to be tested, gas flow through preset gas can be conveniently realized, the gas generation and gas discharge process in the battery formation process can be more accurately simulated, and formation parameters in the simulation formation process can be more accurately evaluated.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:
FIG. 1 is a schematic diagram of a simulation modeling system according to some embodiments of the present application;
fig. 2 is a schematic structural diagram of a battery to be tested according to some embodiments of the present disclosure;
FIG. 3 is a schematic diagram of a simulation modeling apparatus according to some embodiments of the present application;
FIG. 4 is a flowchart illustrating a formation parameter evaluation method according to some embodiments of the present disclosure;
FIG. 5 is a schematic structural diagram of a simulation modeling apparatus according to other embodiments of the present application;
FIG. 6 is a schematic diagram of a simulation modeling system according to other embodiments of the present application;
FIG. 7 is a schematic diagram of a simulation modeling system according to other embodiments of the present application;
fig. 8 is a schematic structural diagram of a simulation modeling system according to other embodiments of the present application.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the term "comprising" and any variations thereof in the description of the present application and claims and in the description of the figures above is intended to cover a non-exclusive inclusion.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more (including two) unless otherwise specifically defined.
The formation is a process of activating the injected battery, so that chemical reaction occurs inside the battery to form an SEI film, wherein the quality of the SEI film can influence the working performance of the battery in the charge-discharge cycle process.
In general, a battery generates some gases during formation, and the gases affect the formation of an SEI film. In order to reduce the influence of gases generated during the formation of a battery on an SEI film, the battery needs to discharge the gases in real time during the formation.
In the related art, a battery with injected liquid is placed in a negative pressure formation machine, and an electrode of the battery is connected through a charging wire to perform a battery formation procedure, wherein the negative pressure formation machine can adjust the air pressure inside the battery, so that the air generated in the battery formation process can be discharged in real time.
However, due to various sizes and specifications of the battery, the amount of electrolyte, and/or formation processes, the formation parameters of the battery may not be reasonably set in the actual formation process, and some electrolyte is easily carried out in the process of exhausting gas, so that the electrolyte of the battery overflows, and even electrolyte crystallization occurs in the formation machine, which affects the performances of the battery and the formation machine.
In order to reduce the occurrence of the above situations in the battery formation process, the embodiment of the application proposes to simulate the physical phenomenon in the battery formation process and evaluate the formation parameters in the simulated formation process according to the detected overflow parameters of the electrolyte, so that more suitable formation parameters can be selected for the actual battery formation process, and the situations of electrolyte overflow and/or electrolyte crystallization in the battery formation process can be reduced.
For ease of understanding, the description of the related contents of the simulation system, the battery to be tested, and the simulation device referred to in the present application will be first described in the embodiments of the present application.
Fig. 1 is a schematic structural diagram of a simulation system provided in some embodiments of the present application, and as shown in fig. 1, the simulation system in the embodiments of the present application may include, but is not limited to: a simulation device 10 and a battery 11 to be tested. The battery 11 to be tested is located in the simulation forming device 10, and the simulation forming device 10 is used for providing a simulation forming environment for the battery 11 to be tested.
Fig. 2 is a schematic structural diagram of a battery to be tested according to some embodiments of the present application, and as shown in fig. 2, the battery to be tested 11 according to embodiments of the present application may include, but is not limited to: the battery body 111, the battery air supply part 112 and the liquid filling port 113 are positioned on the battery body 111, wherein the battery air supply part 112 and the liquid filling port 113 are communicated with each other, so that the gas entering the battery 11 to be tested from the battery air supply part 112 can flow to the liquid filling port 113.
Illustratively, the battery air supply part 112 in the embodiment of the present application may be disposed at the bottom of the battery body 111, so that the gas may flow from the bottom to the top of the battery 11 to be tested to the liquid injection port 113, and thus the process of generating and exhausting the gas during the battery formation may be simulated.
Fig. 3 is a schematic structural diagram of a simulation modeling apparatus according to some embodiments of the present application, and as shown in fig. 3, the simulation modeling apparatus 10 according to the embodiments of the present application may include, but is not limited to: the box 101, the suction nozzle 102 and the air suction channel 103, wherein the air suction channel 103 can be a vacuum channel, so that the air in the battery to be tested can be pumped out under the condition that the air suction channel 103 is opened to negative pressure. It should be appreciated that the bleed air channel 103 may also be referred to as a negative pressure channel when the negative pressure is turned on.
It should be appreciated that a negative pressure source (not shown in fig. 1) may also be included in the modeling system of an embodiment of the present application in connection with the extraction channel 103 in order to provide a negative pressure environment for the extraction channel 103.
Illustratively, the liquid inlet 113 of the battery to be tested in the embodiment of the present application may be connected to the air suction channel 103 in the simulation modeling apparatus 10 by being aligned with the suction nozzle 102 of the simulation modeling apparatus 10; of course, the liquid filling port 113 of the battery to be tested may also be connected to the air suction channel 103 in the analog forming apparatus 10 in other manners, which is not limited in the embodiment of the present application.
In some embodiments, fig. 4 is a flow chart of a formation parameter evaluation method according to some embodiments of the present application. As shown in fig. 4, the method of the embodiment of the present application may include the following steps:
step S401, gas is introduced into the battery to be tested located in the simulation forming apparatus through the battery air supply part on the battery to be tested.
In the embodiment of the application, under the condition that the air suction channel in the simulation forming equipment is opened to negative pressure, the battery air supply part on the battery to be tested can introduce air into the battery to be tested.
The gas introduced into the battery gas supply unit may be, for example, air in a case of the simulation chemical equipment or a dedicated gas supplied from the simulation chemical equipment.
In a possible implementation manner, in the case where the gas introduced into the battery air supply portion is air in the case of the simulation forming apparatus, the inlet of the battery air supply portion of the battery to be tested is exposed to the case of the simulation forming apparatus so that the air in the case enters the content of the battery to be tested through the battery air supply portion.
In another possible implementation manner, in the case where the gas introduced into the gas supply portion of the battery is a dedicated gas provided by the simulation forming apparatus, fig. 5 is a schematic structural diagram of the simulation forming apparatus provided in other embodiments of the present application, and the simulation forming apparatus 10 may include, but is not limited to: a gas source 104, a tank 101 and a ventilation portion 105 located on the tank 101. For example, the type of gas provided by the gas source 104 may be the type of gas produced by the cell during the actual formation process.
Illustratively, one end of the ventilation part 105 is connected to the gas source 104, and the other end of the ventilation part 105 is connected to a battery gas supply part of a battery to be tested located in the simulation forming apparatus 10, for supplying gas to the battery to be tested, so that gas flow through preset gas can be realized to more accurately simulate gas generation and gas discharge processes in the battery formation process, and thus formation parameters in the simulation formation process can be more accurately evaluated.
And step S402, exhausting gas from a liquid injection port of the battery to be tested through an air exhaust channel in the simulation forming equipment.
In this embodiment of the present application, when the air extraction channel in the simulation forming device is opened to a negative pressure, the gas that is introduced into the battery to be tested from the battery air supply unit on the battery to be tested may be discharged from the liquid injection port of the battery to be tested through the air extraction channel in the simulation forming device. Therefore, under the condition that the air suction channel is opened to negative pressure, air can be sucked into the battery to be tested from the battery air supply part on the battery to be tested, and is sucked to the liquid injection port from the bottom of the battery to be tested, which is equivalent to simulating the process of generating air in the actual formation process of the battery and the process of exhausting air.
And step S403, evaluating formation parameters corresponding to the battery to be tested according to overflow parameters of the electrolyte in the battery to be tested in the gas discharge process.
It will be appreciated that in the case of bringing out electrolyte during the simulated gas evacuation, the electrolyte tends to crystallize in the suction nozzle or suction channel. As the amount of crystallization increases, the degree of blockage of the bleed passages is increased, so that the flow rate of the bleed passages will decrease.
The overflow parameter in the embodiment of the application can be used for indicating the overflow condition of the electrolyte of the battery to be tested in the simulation formation process. Illustratively, overflow parameters in embodiments of the present application may include, but are not limited to: the gas flow parameter is used for indicating gas flow information in the simulated battery formation process, or the electrolyte crystallization weight parameter is used for indicating electrolyte crystallization information in the simulated battery formation process.
In a possible implementation manner, in the case that the overflow parameter includes a gas flow parameter, the gas flow parameter in the embodiment of the present application may be a parameter measured by a first flow meter disposed on the pumping channel, or the gas flow parameter may be a parameter measured by a second flow meter disposed on the gas supply portion of the battery.
Of course, the gas flow parameter in the embodiment of the present application may also be a parameter measured by other manners, which is not limited in the embodiment of the present application.
In another possible implementation, where the overflow parameter includes an electrolyte crystallization weight parameter, the electrolyte crystallization weight parameter in embodiments of the present application may be a parameter measured according to a weight change of the suction nozzle.
It will be appreciated that electrolyte that overflows from the cell to be tested may form crystals in the suction nozzle and may also form crystals in the suction channel. The weight of the electrolyte crystals generated during this period of time can be indirectly estimated by periodically comparing the weight changes of the suction nozzle.
Of course, the electrolyte crystallization weight parameter in the embodiment of the present application may also be a parameter measured by other means, which is not limited in the embodiment of the present application.
In this step, according to the overflow parameter of the electrolyte in the battery to be tested in the gas discharging process, the formation parameter corresponding to the battery to be tested may be evaluated, where the evaluation may include, but is not limited to, at least one of the following: and (3) evaluating overflow of the electrolyte, crystallizing of the electrolyte, and blocking of the air suction channel.
For example, for an arbitrary formation parameter corresponding to a battery to be tested, if the electrolyte of the battery to be tested overflows or crystallizes more in the formation process under the formation parameter, the formation parameter is more unsuitable.
As another example, for an arbitrary formation parameter corresponding to a battery to be tested, if the electrolyte of the battery to be tested is more severely blocked in the formation simulation process under the formation parameter, the formation parameter is more unsuitable.
It should be understood that when it is detected that the electrolyte overflows more under any formation parameter, the overflow condition of the electrolyte of the battery to be tested in the simulation formation process under the adjusted formation parameter may be observed by adjusting some or all of the formation parameters, … …, and so on, until an appropriate formation parameter is determined, so that the electrolyte does not overflow or overflows less in the simulation formation process.
Therefore, in the embodiment of the application, the formation parameters corresponding to the battery to be tested can be evaluated according to the overflow parameters of the electrolyte in the battery to be tested in the gas discharge process, so that more proper formation parameters can be selected by adjusting the formation parameters, technical support can be provided for reducing the conditions of electrolyte overflow and/or electrolyte crystallization and the like in the actual battery formation process, and the conditions of electrolyte overflow and/or electrolyte crystallization and the like in the battery formation process can be reduced.
Illustratively, the formation parameters in embodiments of the present application may include, but are not limited to, at least one of the following: negative pressure parameters of the air suction channel, temperature parameters in the simulation forming equipment and electrolyte quantity parameters in the battery to be tested.
In summary, in the embodiment of the present application, gas is introduced into the battery to be tested located in the simulation forming apparatus through the battery air supply portion on the battery to be tested, and is discharged from the liquid injection port of the battery to be tested through the air exhaust channel in the simulation forming apparatus. Further, according to the overflow parameters of the electrolyte in the battery to be tested in the gas discharging process, the formation parameters corresponding to the battery to be tested are evaluated. Therefore, in the embodiment of the application, by simulating the physical process of generating gas and exhausting gas in the battery formation process, and according to the overflow parameter of the electrolyte in the battery to be tested in the gas exhaust process, the formation parameter corresponding to the battery to be tested can be evaluated, so that more proper formation parameters can be selected for the actual battery formation process, the conditions of electrolyte overflow and/or electrolyte crystallization and the like in the battery formation process can be reduced, and therefore, the performance of the battery and the formation machine can be guaranteed, and the production efficiency of the battery can be improved.
In some embodiments, if the overflow parameter includes a gas flow parameter based on the above embodiments, the formation parameter evaluation method according to the embodiments of the present application may further determine the cleaning frequency of the air extraction channel according to the gas flow parameter.
For example, the blockage level of the pumping channel may be identified based on the real-time gas flow parameter and the initial gas flow parameter, so that the cleaning frequency of the pumping channel may be determined.
For example, in the case that the real-time gas flow parameter is detected to be half of the initial gas flow parameter, the blockage degree of the air extraction channel is recognized to exceed the preset blockage threshold value, so that the air extraction channel is determined to need to be cleaned.
Still further exemplary, the degree of blockage of the bleed passage may be identified based on the real-time gas flow parameter and a preset gas flow threshold, such that the frequency of cleaning of the bleed passage may be determined.
For example, if the real-time gas flow parameter is detected to be smaller than the preset gas flow threshold, the blockage degree of the air extraction channel is identified to exceed the preset blockage threshold, so that the air extraction channel is determined to need to be cleaned.
Of course, the cleaning frequency of the air pumping channel may be determined by other manners according to the gas flow parameter, which is not limited in the embodiment of the present application.
According to the embodiment of the application, the air extraction channel of the simulation forming equipment can be timely cleaned by monitoring the air flow parameters in real time and determining the cleaning frequency of the air extraction channel according to the air flow parameters, so that the working performance of the simulation forming equipment is improved.
In some embodiments, on the basis of the above embodiments, the description is given of the related contents of the battery air supply part 112 of the battery to be tested in the embodiments of the present application.
The battery plenum 112 in embodiments of the present application may include, but is not limited to: the air supply port is an opening formed in the battery body 111, and the control unit is used for controlling air entering the battery to be tested through the air supply port.
Illustratively, the control portion in the embodiments of the present application may include, but is not limited to: and the check valve is arranged on the air supply port and used for controlling the gas unidirectional mobility of the air supply port so as to more accurately simulate the gas mobility in the battery formation process. For example, a one-way valve may control the flow of gas from the gas bleed into the interior of the battery to be tested, but not from the interior of the battery to be tested.
Still another exemplary, the control part in the embodiment of the present application may include, but is not limited to: and a throttle valve provided in the air feed port, wherein the throttle valve can be used for controlling the air flow rate of the air feed port.
Correspondingly, the formation parameter evaluation method of the embodiment of the application can also adjust the opening degree of the throttle valve according to the gas flow parameter so as to simulate the battery formation process of different gas production speeds.
Still another exemplary, the control part in the embodiment of the present application may include, but is not limited to: the check valve and the throttle valve are arranged on the air supply port so as to simulate the battery formation process of different gas production speeds more accurately.
It should be noted that the check valve and the throttle valve may be fixed by a threaded structure or a snap structure, and of course, may be fixed by other manners, which is not limited in the embodiment of the present application.
Still another exemplary, the control part in the embodiment of the present application may include, but is not limited to: the one-way throttle valve is arranged on the air supply port, wherein the one-way throttle valve can be used for controlling the one-way fluidity of the air supply port and the air flow of the air supply port, so that the battery formation process of different gas production speeds can be simulated more accurately.
For ease of understanding, the embodiment described below will further describe the simulation system by taking the example in which the control part in the battery air supply part 112 includes the check valve F1 and the throttle valve F2 provided at the air supply port.
Fig. 6 is a schematic structural diagram of a simulation system according to other embodiments of the present application, and as shown in fig. 6, a battery to be tested according to an embodiment of the present application may include: a battery body 111, a battery air supply portion 112, and a liquid filling port (not shown in fig. 6). Illustratively, the battery body 111 may include, but is not limited to, an aluminum case body. The control part in the battery air supply part 112 may include, but is not limited to, a check valve F1 and a throttle valve F2 provided to the air supply port.
The simulation forming apparatus in the embodiment of the present application may include: the device comprises a box body 101, a suction nozzle 102, a suction channel 103, a formation cup 106, a gas-liquid separator 107 and a first flowmeter 108. Illustratively, the simulation forming apparatus in the embodiments of the present application may include, but is not limited to, a negative pressure thermostating machine.
As shown in fig. 6, the battery to be tested may be located in a tray of the simulation modeling apparatus, and a liquid filling port of the battery to be tested may be aligned and fitted with the suction nozzle 102 of the simulation modeling apparatus. It should be noted that, because the battery to be tested is simulated in the embodiment of the present application, the electrode of the battery to be tested in the embodiment of the present application is not connected to the charging line, and does not perform the charge/discharge treatment.
In this embodiment of the present application, by opening the negative pressure of the air suction channel 103 in the simulation forming apparatus, the gas in the box 101 of the simulation forming apparatus may be drawn into the battery to be tested by the throttle valve F2 of the battery to be tested, and drawn out to the suction nozzle 102 of the simulation forming apparatus by the liquid injection port of the battery to be tested, which is equivalent to simulating the process of generating the gas in the actual forming process of the battery and the process of exhausting the gas.
It will be appreciated that by adjusting the degree of opening of the throttle valve F2, the cell formation process for different gas production rates can be simulated.
In the case where the electrolyte is carried out during the simulated gas discharge, the electrolyte is likely to crystallize in the suction nozzle 102 or the suction duct 103, which corresponds to a process simulating the overflow of the electrolyte and/or the crystallization of the electrolyte during the actual formation of the battery.
In summary, in the embodiment of the present application, by simulating the physical processes such as gas generation, gas exhaust, electrolyte overflow, and electrolyte crystallization in the battery formation process, and by monitoring the overflow parameters of the electrolyte in the battery to be tested in the gas exhaust process in real time, and according to the overflow parameters of the electrolyte in the battery to be tested in the gas exhaust process, the formation parameters corresponding to the battery to be tested can be evaluated, so that the formation parameters can be adjusted to select more suitable formation parameters, technical support can be provided for reducing the conditions such as electrolyte overflow and/or electrolyte crystallization in the actual battery formation process, and the problem of material loss caused by the conditions such as electrolyte overflow and/or electrolyte crystallization in the actual battery formation process can be solved, thereby further facilitating saving of the production cost of the battery.
Further, fig. 7 is a schematic structural diagram of a simulation system according to other embodiments of the present application, as shown in fig. 7, the control portion in the battery air supply portion 112 may replace the check valve F1 and the throttle valve F2 shown in fig. 6 with an integrated check throttle valve F, so as to improve the installation efficiency of the system and save the cost of the system.
Further, fig. 8 is a schematic structural diagram of a simulation system according to another embodiment of the present application, and as shown in fig. 8, the simulation device may further include: a gas source 104, a vent portion 105, and a second flowmeter 109 disposed in the vent portion 105. One end of the ventilation portion 105 is connected to the air source 104, and the other end of the ventilation portion 105 is connected to the throttle valve F2 in the battery air supply portion of the battery to be tested, so as to provide a preset gas for the battery to be tested, so that the preset gas in the air source 104 can be pumped into the battery to be tested through the throttle valve F2 of the battery to be tested and pumped into the suction nozzle 102 of the simulation forming device through the liquid injection port of the battery to be tested by opening the negative pressure of the air suction channel 103 in the simulation forming device.
Therefore, the embodiment of the application can more accurately simulate the gas generation and gas discharge process in the battery formation process by presetting the gas flow of the gas, so that the formation parameters in the simulated formation process can be more accurately evaluated.
It should be understood that, although the steps in the flowcharts related to the above embodiments are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
In some embodiments, a test battery is further provided, where the test battery may be applied to the formation parameter evaluation method provided in the foregoing embodiments of the present application, and the test battery includes a battery body, a battery air supply portion located on the battery body, and a liquid filling port, where the battery air supply portion and the liquid filling port are mutually communicated.
According to the test battery, the battery air supply part and the liquid injection port which are mutually communicated are arranged on the battery body, so that the gas entering the test battery from the battery air supply part can flow to the liquid injection port under the condition that the test battery is arranged in the simulation formation equipment, and the process of generating the gas and exhausting the gas in the formation process of the battery can be simulated.
In some embodiments, the battery air supply part is arranged at the bottom of the battery body, so that the gas can flow from the bottom of the battery to be tested to the liquid injection port at the top, and the process of generating the gas and exhausting the gas in the battery formation process can be simulated.
In some embodiments, the battery plenum includes: and the control part is used for controlling the gas entering the test battery from the gas inlet.
In some embodiments, the control portion includes: a check valve provided at the air supply port; or a check valve and a throttle valve provided in the air feed port.
In some embodiments, there is also provided a simulation forming apparatus, wherein the simulation forming apparatus includes: the device comprises an air source, a box body and a ventilation part positioned on the box body, wherein one end of the ventilation part is connected with the air source, and the other end of the ventilation part is used for being connected with a battery air supply part of a battery to be tested positioned in the simulation forming equipment and used for providing gas for the battery to be tested.
According to the simulation formation equipment, one end of the ventilation part located on the box body is connected with the air source, and the other end of the ventilation part is connected with the battery air supply part of the battery to be tested located in the simulation formation equipment and used for providing gas for the battery to be tested, so that gas flow through preset gas can be realized, the gas generation and gas discharge process in the battery formation process can be simulated more accurately, and the formation parameters in the simulation formation process can be evaluated more accurately.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (11)
1. A method of formation parameter evaluation, the method comprising:
introducing gas into the battery to be tested in the simulation formation equipment through a battery gas supply part on the battery to be tested;
exhausting gas from a liquid injection port of the battery to be tested through an air exhaust channel in the simulation forming equipment;
evaluating formation parameters corresponding to the battery to be tested according to overflow parameters of the electrolyte in the battery to be tested in the gas discharging process, wherein the overflow parameters are used for indicating overflow conditions of the electrolyte in the battery to be tested in the simulation formation process; wherein the formation parameters include at least one of: the negative pressure parameter of the air suction channel, the temperature parameter in the simulation forming equipment and the electrolyte quantity parameter in the battery to be tested.
2. The method of claim 1, wherein the overflow parameter comprises a gas flow parameter.
3. The method of claim 2, wherein the gas flow parameter is a parameter measured by a first flow meter disposed on the extraction channel, or,
the gas flow rate parameter is a parameter measured by a second flowmeter provided in the battery gas supply unit.
4. The method according to claim 2, wherein the method further comprises:
and determining the cleaning frequency of the air suction channel according to the gas flow parameters.
5. The method of claim 1, wherein the overflow parameter comprises an electrolyte crystallization weight parameter.
6. The method according to claim 5, wherein the liquid inlet of the battery to be tested is connected with the air suction channel through a suction nozzle, and the electrolyte crystallization weight parameter is a parameter measured according to the weight change of the suction nozzle.
7. A test cell applicable to the method of any one of claims 1-6, wherein the test cell comprises a cell body, a cell plenum positioned on the cell body, and a fluid injection port, wherein the cell plenum and the fluid injection port are in communication with each other.
8. The test battery of claim 7, wherein the battery plenum is disposed at a bottom of the battery body.
9. The test battery according to claim 7 or 8, wherein the battery air supply portion includes: and the control part is used for controlling the gas entering the test battery from the gas feeding port.
10. The test battery according to claim 9, wherein the control section includes any one of:
a check valve provided to the air supply port;
a throttle valve provided to the air feed port;
a one-way throttle valve provided to the air supply port;
and the check valve and the throttle valve are arranged on the air supply port.
11. A simulation modeling apparatus, wherein the simulation modeling apparatus comprises: a gas source, a box and a ventilation part on the box, wherein one end of the ventilation part is connected with the gas source, and the other end of the ventilation part is used for being connected with a battery gas supply part of a battery to be tested in the simulation forming equipment and used for providing gas for the battery to be tested so as to realize the method as claimed in any one of claims 1-6.
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079509A (en) * | 2006-05-22 | 2007-11-28 | 比亚迪股份有限公司 | A making method for lithium ion secondary cell |
| CN101887994A (en) * | 2009-05-15 | 2010-11-17 | 深圳市鸿德电池有限公司 | Vacuum formation method of lithium ion battery |
| JP2012169451A (en) * | 2011-02-14 | 2012-09-06 | Espec Corp | Test device of solar cell panel, test method, control device, and program |
| CN103700887A (en) * | 2014-01-03 | 2014-04-02 | 国家电网公司 | Lithium titanate battery opening formation device and opening formation method |
| CN104597408A (en) * | 2015-01-12 | 2015-05-06 | 华中科技大学 | Lithium-air battery testing mold and assembly method thereof |
| CN105445667A (en) * | 2015-11-23 | 2016-03-30 | 山东精工电子科技有限公司 | Soft packaged lithium ion battery formation gas production testing device |
| CN107727756A (en) * | 2017-09-12 | 2018-02-23 | 东莞市迈科新能源有限公司 | The gas-chromatography test device and method in situ of gas caused by inside lithium ion cell |
| CN108646198A (en) * | 2018-07-27 | 2018-10-12 | 安徽师范大学 | A kind of battery parameter estimating system |
| CN208423053U (en) * | 2018-07-03 | 2019-01-22 | 浙江衡远新能源科技有限公司 | A kind of lithium ion battery liquid injection chemical conversion integrated device |
| CN111180800A (en) * | 2020-03-04 | 2020-05-19 | 广东博龙能源科技有限公司 | Formation process of lithium ion battery and lithium ion battery |
| EP3886230A1 (en) * | 2018-11-22 | 2021-09-29 | Zhejiang Hangke Technology Incorporated Company | Cylindrical lithium ion battery formation and capacity division apparatus |
| CN115683264A (en) * | 2022-11-25 | 2023-02-03 | 星恒电源股份有限公司 | Evaluation method of lithium battery gas production rate and parameter optimization method in aging process |
-
2023
- 2023-04-06 CN CN202310355476.6A patent/CN116067439B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079509A (en) * | 2006-05-22 | 2007-11-28 | 比亚迪股份有限公司 | A making method for lithium ion secondary cell |
| CN101887994A (en) * | 2009-05-15 | 2010-11-17 | 深圳市鸿德电池有限公司 | Vacuum formation method of lithium ion battery |
| JP2012169451A (en) * | 2011-02-14 | 2012-09-06 | Espec Corp | Test device of solar cell panel, test method, control device, and program |
| CN103700887A (en) * | 2014-01-03 | 2014-04-02 | 国家电网公司 | Lithium titanate battery opening formation device and opening formation method |
| CN104597408A (en) * | 2015-01-12 | 2015-05-06 | 华中科技大学 | Lithium-air battery testing mold and assembly method thereof |
| CN105445667A (en) * | 2015-11-23 | 2016-03-30 | 山东精工电子科技有限公司 | Soft packaged lithium ion battery formation gas production testing device |
| CN107727756A (en) * | 2017-09-12 | 2018-02-23 | 东莞市迈科新能源有限公司 | The gas-chromatography test device and method in situ of gas caused by inside lithium ion cell |
| CN208423053U (en) * | 2018-07-03 | 2019-01-22 | 浙江衡远新能源科技有限公司 | A kind of lithium ion battery liquid injection chemical conversion integrated device |
| CN108646198A (en) * | 2018-07-27 | 2018-10-12 | 安徽师范大学 | A kind of battery parameter estimating system |
| EP3886230A1 (en) * | 2018-11-22 | 2021-09-29 | Zhejiang Hangke Technology Incorporated Company | Cylindrical lithium ion battery formation and capacity division apparatus |
| CN111180800A (en) * | 2020-03-04 | 2020-05-19 | 广东博龙能源科技有限公司 | Formation process of lithium ion battery and lithium ion battery |
| CN115683264A (en) * | 2022-11-25 | 2023-02-03 | 星恒电源股份有限公司 | Evaluation method of lithium battery gas production rate and parameter optimization method in aging process |
Non-Patent Citations (1)
| Title |
|---|
| 基于模拟工况的电动汽车动力电池化成监测系统;廖育武 等;《湖北文理学院学报》;第26-29页 * |
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