CN115663319A - Battery formation method and battery formation equipment - Google Patents
Battery formation method and battery formation equipment Download PDFInfo
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- CN115663319A CN115663319A CN202211400061.8A CN202211400061A CN115663319A CN 115663319 A CN115663319 A CN 115663319A CN 202211400061 A CN202211400061 A CN 202211400061A CN 115663319 A CN115663319 A CN 115663319A
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- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 278
- 238000000034 method Methods 0.000 title claims abstract description 205
- 239000003792 electrolyte Substances 0.000 claims abstract description 203
- 239000007788 liquid Substances 0.000 claims abstract description 180
- 238000000605 extraction Methods 0.000 claims abstract description 52
- 238000002161 passivation Methods 0.000 claims abstract description 18
- 238000004140 cleaning Methods 0.000 claims description 13
- 238000001514 detection method Methods 0.000 claims description 11
- 241000695274 Processa Species 0.000 claims 1
- 238000005086 pumping Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000000740 bleeding effect Effects 0.000 abstract description 3
- 238000003860 storage Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 13
- 238000004590 computer program Methods 0.000 description 7
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 6
- 229910001416 lithium ion Inorganic materials 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
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- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 230000003287 optical effect Effects 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009469 supplementation Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The application discloses a battery formation method and battery formation equipment. In the battery formation method, the capacity of the overflowed electrolyte in the liquid collecting container is obtained; when the capacity of the overflowed electrolyte exceeds a first capacity threshold value, the extraction speed of the overflowed electrolyte in the formation process is reduced, so that the battery can normally form a passivation film layer in the formation process. Compared with the prior art, the volume through overflowing electrolyte in this application reflects the liquid condition of losing of going out the battery, and the electrolyte capacity that works as in the collecting container is many, proves to become that the battery loses much liquid volume to real-time regulation and control becomes the negative pressure of bleeding, can effectively avoid the production of substandard product battery.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery formation method and battery formation equipment.
Background
The lithium ion battery mainly uses a carbon material as a negative electrode material and a lithium-containing compound as a positive electrode material. When the battery is charged, lithium ions are generated on the positive electrode of the battery, and the generated lithium ions move to the negative electrode through the electrolyte; on the other hand, the carbon as the negative electrode has many micropores, and lithium ions reaching the negative electrode are inserted into the micropores of the carbon layer, and the more lithium ions are inserted, the higher the charge capacity is. In the manufacturing process of the lithium ion battery, the electrolyte overflows due to the influence of gas and negative pressure generated in the formation process, and defective batteries are generated if the electrolyte overflows too much.
In the prior art, technicians manually observe the electrolyte at the battery after the formation of the battery is completed every time, so that the electrolyte is supplemented when the electrolyte is insufficient, but the supplementation of the electrolyte at the moment cannot guarantee whether the yield of the battery is affected by the lack of the electrolyte in the previous formation process, and how to reduce the formation liquid loss amount and increase the yield of the formed battery cell is an urgent problem to be solved by the technicians in the field.
Disclosure of Invention
The embodiment of the application discloses a battery formation method and battery formation equipment, which are used for reducing formation liquid loss, increasing the yield of a formation battery core and reducing the production cost.
In a first aspect, the present application provides a battery formation method, which is applied to a battery formation device, the battery formation device includes a liquid collecting container, a negative pressure system and a controller, the negative pressure system is connected to the liquid collecting container, the controller is connected to the negative pressure system, the controller is configured to control an extraction speed of an electrolyte overflowed during the battery formation process by the negative pressure system, the liquid collecting container is configured to collect the overflowed electrolyte extracted during the battery formation process, and the method includes: the controller obtains the capacity of the overflowed electrolyte collected in the liquid collecting container; when the capacity of the overflowed electrolyte in the liquid collecting container reaches a first capacity threshold value, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the battery formation process, and the first capacity threshold value is smaller than the critical capacity of the overflowed electrolyte in the liquid collecting container when the battery can normally form a passivation film layer in the formation process.
In the battery formation method, the capacity of the overflowed electrolyte in the liquid collecting container is obtained; when the capacity of the overflowing electrolyte reaches a first capacity threshold value, the extraction speed of the overflowing electrolyte in the formation process is reduced, so that the battery can normally form a passivation film layer in the formation process. Compared with the prior art, the volume through overflowing electrolyte in this application reflects the liquid condition of losing of going out the battery, and the electrolyte capacity that works as in the collecting container is many, proves to become that the battery loses much liquid volume to real-time regulation and control becomes the negative pressure of bleeding, can effectively avoid the production of substandard product battery.
In one embodiment, the first capacity threshold is determined based on the number of cells and the initial amount of electrolyte in the formation process.
In one embodiment, the first capacity threshold is calculated by the following formula:
X 0 <a*n*L 0 *b
wherein, X 0 N is the number of batteries in the formation process, L is the first capacity threshold value 0 B is a theoretical fluid loss coefficient, and a is a correction constant of the theoretical fluid loss coefficient in the actual formation process.
In one embodiment, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the battery formation process, and the method comprises the following steps: the controller controls the negative pressure system to reduce the negative pressure applied in the formation process.
In one embodiment, the method further comprises: after the formation process is finished, when the volume of the overflowed electrolyte in the liquid collecting container exceeds a preset second volume threshold value, the controller controls the negative pressure system to introduce air so as to remove the overflowed electrolyte in a connecting pipeline of the battery formation equipment.
In one embodiment, a volume sensor is disposed in the liquid collecting container, the volume sensor is configured to detect a volume of the overflowing electrolyte in the liquid collecting container, and the controller obtains the volume of the overflowing electrolyte in the liquid collecting container, and the controller includes: the controller receives a detection result sent by the capacity sensor and used for indicating the capacity of the overflowed electrolyte in the liquid collecting container.
In one embodiment, the battery formation equipment further includes a battery formation bin, a gas-liquid separator and an air pressure sensor, a liquid outlet of the battery formation bin is connected with a liquid inlet of the gas-liquid separator, a liquid outlet of the gas-liquid separator is connected with a liquid inlet of the liquid collecting container, a gas outlet of the gas-liquid separator is connected with the negative pressure system through the air pressure sensor, a first switch is arranged between a gas outlet of the gas-liquid separator and the negative pressure system, a first passage between the battery formation bin, the gas-liquid separator, the air pressure sensor and the negative pressure system is formed after the first switch is turned on, and before the controller obtains the capacity of the electrolyte in the liquid collecting container, the method further includes: the controller controls the first switch to be turned on; and after the first switch is turned on, the controller controls the negative pressure system to start to extract the overflowing electrolyte in the battery formation process.
In one embodiment, before the controller controls the negative pressure system to start to extract the overflowed electrolyte in the battery formation process after the first switch is turned on, the method further includes: and the controller controls the negative pressure system to start introducing air so as to remove the overflowing electrolyte in a connecting pipeline of the battery formation equipment.
In one embodiment, a second switch is further disposed between the gas-liquid separator and the negative pressure system, the second switch is connected in parallel with the first switch, a second path is formed between the battery formation bin, the gas-liquid separator, the air pressure sensor and the negative pressure system after the second switch is turned on, and before the controller controls the first switch to be turned on, the method further includes: the controller controls the second switch to be turned on; after the second switch is turned on, the controller controls the negative pressure system to start to introduce air so that the introduced air passes through the second passage to remove the overflowing electrolyte in the connecting pipeline of the battery formation equipment; the controller controls the second switch to be closed.
In a second aspect, the application provides a battery becomes equipment, battery becomes equipment and includes controller, liquid collecting container, battery formation storehouse, vapour and liquid separator, pressure sensor and negative pressure system, the battery become the liquid outlet in storehouse with vapour and liquid separator's inlet is connected, vapour and liquid separator's liquid outlet with liquid collecting container's inlet is connected, vapour and liquid separator's gas outlet warp pressure sensor with negative pressure system connects, the controller is used for control negative pressure system's extraction speed the controller includes: the capacity obtaining module is used for obtaining the capacity of the overflowing electrolyte in the liquid collecting container; and the extraction speed adjusting module is used for controlling the negative pressure system to reduce the extraction speed of the overflowing electrolyte in the battery formation process when the capacity of the overflowing electrolyte in the liquid collecting container reaches a first capacity threshold value, wherein the first capacity threshold value is smaller than the critical capacity of the overflowing electrolyte in the liquid collecting container when the battery can normally form a passivation film layer in the formation process.
In one embodiment, the extraction speed adjusting module includes: and the negative pressure intensity adjusting submodule is used for controlling the negative pressure system to reduce the negative pressure intensity applied in the formation process.
In one embodiment, the controller further includes: and the electrolyte cleaning module is used for controlling the negative pressure system to introduce air to clean the overflowing electrolyte in the connecting pipeline of the battery formation equipment when the capacity of the overflowing electrolyte in the liquid collecting container exceeds a preset second capacity threshold value after the formation process is finished.
In one embodiment, a capacity sensor is disposed in the liquid collecting container, and the capacity sensor is configured to detect a capacity of the overflowing electrolyte in the liquid collecting container, and the capacity obtaining module includes: and the detection result receiving submodule is used for receiving a detection result which is sent by the capacity sensor and is used for indicating the capacity of the overflowed electrolyte in the liquid collecting container.
In one embodiment, when a first switch is disposed between the air outlet of the gas-liquid separator and the negative pressure system, the first switch is turned on to form a first path between the battery formation bin, the gas-liquid separator, the air pressure sensor and the negative pressure system, and the controller further includes: the first switch control module is used for controlling the first switch to be turned on before the capacity of the overflowed electrolyte in the liquid collecting container is obtained; and the electrolyte extraction module is used for controlling the negative pressure system to start extracting the overflowing electrolyte in the battery formation process after the first switch is turned on.
In one embodiment, the controller further comprises: the electrolyte cleaning module is further used for controlling the negative pressure system to start introducing air before controlling the negative pressure system to start extracting the overflowed electrolyte in the battery formation process so as to clean the overflowed electrolyte in a connecting pipeline of the battery formation equipment.
In one embodiment, when a second switch is further disposed between the gas-liquid separator and the negative pressure system, and the second switch is connected to the first switch in parallel, the second switch is turned on to form a second path between the electrochemical storage chamber, the gas-liquid separator, the gas pressure sensor, and the negative pressure system, and the controller further includes: the second switch control module is used for controlling the second switch to be turned on before controlling the first switch to be turned on; the electrolyte cleaning module is further configured to control the negative pressure system to start introducing air after the second switch is turned on, so that the introduced air passes through the second passage to clean the overflowing electrolyte in the connecting pipeline of the battery formation equipment; the second switch control module is further configured to control the second switch to be turned off after the second switch is turned on for a preset time.
It should be understood that the second aspect of the present application is consistent with the technical solution of the first aspect of the present application, and similar advantageous effects are obtained in various aspects and corresponding possible embodiments, and thus, detailed description is omitted.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a battery formation device in the prior art of the present application;
fig. 2 is a schematic structural diagram of a battery formation apparatus according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 6 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of a battery formation apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 9 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of a battery formation apparatus according to an embodiment of the present disclosure;
fig. 11 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure;
fig. 12 is a schematic structural diagram of a battery formation apparatus according to an embodiment of the present disclosure;
fig. 13 is a schematic structural diagram of a computer device according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is to be noted that the terms "comprises" and "comprising" and any variations thereof in the examples and figures of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
In the following description, reference is made to "some embodiments" which describe a subset of all possible embodiments, but it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a battery formation apparatus in the prior art of the present application. As shown, the apparatus may include: the battery chemical synthesis device comprises a liquid collecting container 10, a controller 11, a battery chemical synthesis bin 12, a gas-liquid separator 13, an air pressure sensor 14 and a negative pressure system 15, wherein a liquid outlet of the battery chemical synthesis bin 12 is connected with a liquid inlet of the gas-liquid separator 13, a liquid outlet of the gas-liquid separator 13 is connected with a liquid inlet of the liquid collecting container 10, a gas outlet of the gas-liquid separator 13 is connected with the negative pressure system 15 through the air pressure sensor 14, the controller 11 is electrically connected with the air pressure sensor 14 and the negative pressure system 15 respectively, and the controller 11 is used for controlling the negative pressure system 15 to operate.
Optionally, the number of the battery formation bins 12 may be more than two, or may be one, and the specific number is set by a person skilled in the art according to actual needs, which is not limited in the present application. When the number of the battery formation bins 12 is two or more, the battery formation bins 12 and the gas-liquid separator 13 may be connected by a collecting pipe, and the collecting pipe is used for collecting electrolyte overflowing from the two or more battery formation bins into one strand.
Optionally, the battery formation equipment may further include a flexible pipeline device, the flexible pipeline device includes a corrosion-resistant flexible hose and a fixed connector, the battery formation bin 12, the gas-liquid separator 13, the air pressure sensor 14 and the negative pressure system 15 may be connected through the corrosion-resistant flexible hose, and the fixed connector connects the corrosion-resistant flexible hose and a joint between each structure, so as to ensure reliable airtightness and corrosion resistance, and prevent leakage of the electrolyte.
Optionally, the gas-liquid separator 13 may include a gas-liquid separation filter unit for separating and filtering the gas generated in the formation process and the overflow electrolyte to inject the separated overflow electrolyte into the liquid collection container 10 through the liquid outlet, and a drying unit for drying the gas to send out the dried gas through the gas outlet.
Before implementation, a technician puts a battery to be formed into a battery formation bin 12, and injects initial electrolyte into the battery formation bin 12, when the implementation is started, the technician starts and adjusts control parameters of a negative pressure system 15 through a controller 11 to apply negative pressure to the interior of the battery formation equipment, and as the negative pressure is continuously applied to the battery formation equipment, the liquid level of the electrolyte in the battery formation bin 12 begins to rise, so that the electrolyte overflows from the battery formation bin 12 and enters a pipeline channel, meanwhile, gas generated in the battery formation process also enters the pipeline channel, and then the gas and the overflowing electrolyte enter a gas-liquid separator 13 for separation, and the electrolyte and fine impurities enter a liquid collecting container after being filtered; gas still exists in corrosion-resistant flexible hose, and because of the dry portion effect in vapour and liquid separator 13 this moment, carry out the drying with the gas in the pipeline and because the moisture that electrolyte brought, the gas after the drying is taken out by the negative pressure to the only dry gas that gets into follow-up pipeline, thereby can not lead to the fact the corruption to follow-up pipeline, not only prolonged the life of follow-up pipeline from this greatly, guaranteed the gas tightness of follow-up pipeline moreover. In the whole process, the air pressure sensor 14 acquires the air pressure value inside the battery formation equipment in real time and sends the acquired air pressure value to the controller 11, so that the controller 11 adjusts the extraction speed of the negative pressure system in real time, the air pressure in the formation process is controllable, and the reliability is improved.
In the process, however, technicians need to manually observe the electrolyte in the battery formation bin in real time after the completion of the battery formation every time, so that the electrolyte is supplemented when the electrolyte is insufficient, and the supplementation of the electrolyte at the moment cannot ensure whether the yield of the battery is influenced by the lack of the electrolyte in the previous formation process.
In order to solve the above technical problem, the present application provides a battery formation method, which can be applied to the above battery formation apparatus.
Fig. 2 is a schematic structural diagram of a battery formation apparatus according to an embodiment of the present application, and as shown in the figure, the controller 11 is electrically connected to the negative pressure system 15 and the liquid container 10, respectively, based on the battery formation apparatus shown in fig. 1.
Fig. 3 is a schematic flow chart of a battery formation method provided in an embodiment of the present application, and as shown in the drawing, the battery formation method is applied to the battery formation apparatus shown in fig. 2, and the battery formation method may include the following steps:
in step S301, the controller obtains the volume of the overflowed electrolyte collected in the liquid collecting container.
Alternatively, a capacity sensor for detecting the capacity of the overflowing electrolyte, such as a pressure sensor, a weight sensor, a level sensor, and the like, may be installed in the liquid collecting container. The installation position of the sensor is set by a person skilled in the art according to actual needs, for example, when the pressure sensor is installed, the pressure sensor can be installed at the bottom of the inner wall of the liquid collecting container, so that the capacity of the overflowed electrolyte can be calculated by detecting the pressure received by the bottom due to the extrusion of the electrolyte; when the weight sensor is installed, the weight sensor can be installed at the bottom of the liquid collection container, the bottom can be the bottom of the inner wall or the bottom of the outer wall, and the volume of the overflowed electrolyte is calculated by detecting the weight of the liquid collection container; when the level sensor is installed, it may be installed at a fixed height so that the subsequent step S302 is performed when the volume of the overflowing electrolyte reaches a volume corresponding to the fixed height.
Step S302, when the capacity of the overflowing electrolyte reaches a first capacity threshold value, the controller controls the negative pressure system to reduce the extraction speed of the overflowing electrolyte in the formation process of the battery, and the first capacity threshold value is smaller than the critical capacity of the overflowing electrolyte when the battery can normally form a passivation film layer in the formation process.
Optionally, the first capacity threshold may be obtained by calculating, by a technician in advance, a volume of a battery formation chamber in the battery formation equipment and a critical capacity of an overflow electrolyte when the battery can normally form a passivation film layer, and selecting a suitable value from a threshold range to which the first capacity threshold belongs as the first capacity threshold, where the specific value of the first capacity threshold may be selected by the technician in the art according to an actual situation.
Alternatively, the first capacity threshold may be determined according to the number of batteries and the initial amount of electrolyte in the formation process.
It should be understood that, because the loss factors of the electrolyte during the formation process of the battery mainly include the consumed part during the formation process of the battery and the electrolyte overflowing from the formation bin due to the continuous application of negative pressure by the formation equipment of the battery, that is, the capacity of the electrolyte in the formation bin when the battery can normally form the passivation film layer should be larger than the capacity of the initial electrolyte amount to remove the overflowing electrolyte, the critical capacity of the overflowing electrolyte when the battery can normally form the passivation film layer is related to the number of batteries in the formation process and the initial electrolyte amount, that is, the first capacity threshold can be determined according to the number of batteries in the formation process and the initial electrolyte amount.
Alternatively, the first capacity threshold may satisfy the following equation:
X 0 <a*n*L 0 *b
wherein, X 0 N is the battery in the formation process for the first capacity threshold valueNumber, L 0 B is a theoretical fluid loss coefficient, and a is a correction constant of the theoretical fluid loss coefficient in the actual formation process.
It is understood that L is defined by 0 * The equation b n a can be calculated to obtain the maximum volume of the electrolyte overflowing during the formation process, and in some embodiments, the above L can be calculated 0 * The result of the b n a equation is the maximum capacity of the collection container.
For example, when the first capacity threshold is half of the maximum capacity of the liquid collecting container, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the battery formation process when the capacity of the overflowed electrolyte obtained by the controller reaches half of the maximum capacity of the liquid collecting container in the formation process.
In the battery formation method, the capacity of the overflowed electrolyte in the liquid collecting container is obtained; when the capacity of the overflowing electrolyte reaches a first capacity threshold value, the extraction speed of the overflowing electrolyte in the formation process is reduced, so that the battery can normally form a passivation film layer in the formation process. Compared with the prior art, the volume through overflowing electrolyte in this application reflects the liquid condition of losing of going out the battery, and the electrolyte capacity that works as in the collection liquid container is many, proves to become that the battery loses the liquid volume many to real-time regulation and control becomes the negative pressure of bleeding, can effectively avoid the production of substandard product battery.
Fig. 4 is a schematic flow chart of a battery formation method provided in an embodiment of the present application, and as shown in the figure, the battery formation method may include the following steps:
in step S401, the controller obtains the volume of the overflowed electrolyte collected in the liquid collecting container.
The execution manner of step S401 is the same as the execution manner of step S301, and is not described herein again.
Step S402, when the capacity of the overflowed electrolyte reaches a first capacity threshold value, the controller controls the negative pressure system to reduce the negative pressure applied in the formation process, and the first capacity threshold value is smaller than the critical capacity of the overflowed electrolyte when the battery can normally form a passivation film layer in the formation process.
It should be understood that the negative pressure system controls the air pressure of the internal environment of the whole battery formation equipment, and when the applied negative pressure is increased, the air pressure of the internal environment of the battery formation equipment is reduced, so that the liquid level of the electrolyte in the battery formation bin is increased; when the applied negative pressure is reduced, the air pressure of the internal environment of the battery formation equipment is improved, and the liquid level of the electrolyte in the battery formation bin is reduced. When the liquid level of the electrolyte in the battery formation bin is reduced, the electrolyte overflowing the battery formation bin is reduced, so that the extraction speed of the overflowing electrolyte in the battery formation process is reduced.
The execution manner of the step S402 is the same as the execution manner of the step S302, and is not described herein again.
In the battery formation method, the negative pressure system is controlled to reduce the negative pressure applied in the formation process so as to control the extraction speed of the overflowed electrolyte in the battery formation process, and the control parameter of the negative pressure system of the battery formation equipment is directly controlled so as to control the extraction speed of the overflowed electrolyte.
Fig. 5 is a schematic flow chart of a battery formation method provided in an embodiment of the present application, and as shown in the drawing, the battery formation method may include the following steps:
in step S501, the controller obtains the volume of the overflowed electrolyte collected in the liquid collecting container.
Step S502, when the capacity of the overflowed electrolyte reaches a first capacity threshold, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the formation process of the battery, and the first capacity threshold is smaller than the critical capacity of the overflowed electrolyte when the battery can normally form a passivation film layer in the formation process.
The execution manner of the steps S501 to S502 is the same as the execution manner of the steps S301 to S302, and the description thereof is omitted.
And step S503, after the formation process is finished, when the volume of the overflowed electrolyte in the liquid collecting container exceeds a preset second volume threshold, the controller controls the negative pressure system to introduce air so as to remove the overflowed electrolyte in the connecting pipeline of the battery formation equipment.
Optionally, the specific value of the second capacity threshold is set by a person skilled in the art according to actual requirements, and it is determined that the pipeline needs to be cleaned when the capacity of the overflowing electrolyte in the liquid collecting container reaches the specific value, and the present application is not limited thereto, for example, after the formation process is completed, when it is found that the capacity of the overflowing electrolyte in the liquid collecting container exceeds one-third of the maximum capacity of the liquid collecting container, it is determined that a part of electrolyte is blocked in the pipeline at this time, and at this time, it is necessary to control the negative pressure system to introduce air to clean the pipeline, so as to prepare for execution of the formation process next time.
Optionally, whether the formation process is completed or not may be determined according to whether the battery in the battery formation bin is taken out, and when the battery in the battery formation bin is taken out, the formation process is completed; when the battery in the battery formation bin is not taken out, the formation process is not finished. In some embodiments, the manner of determining whether the battery in the battery formation bin is taken out may be determined according to an opening state of the bin door, and when the charging and discharging time of the battery in the battery formation bin reaches a standard time, it is determined that the formation process is finished but not completed, and the formation process is considered to be completed only when the bin door of the battery formation bin is changed from the opening state to the closing state.
It should be noted that, the above-mentioned embodiment for determining whether the battery in the battery formation bin is taken out may adopt the existing means, and the details are not repeated herein.
According to the battery formation method, after the formation process is completed, when the volume of the overflowing electrolyte in the liquid collection container exceeds the preset second volume threshold, the controller controls the negative pressure system to introduce air so as to remove the overflowing electrolyte in the connecting pipeline of the battery formation equipment, so that the intellectualization of the formation process is realized, the formation efficiency is improved, and the production cost is reduced.
Fig. 6 is a schematic flow chart of a battery formation method according to an embodiment of the present disclosure, and as shown in the drawing, the battery formation method may include the following steps:
in step S601, the controller receives a detection result indicating the volume of the electrolyte overflowing from the liquid collecting container, which is transmitted from the volume sensor.
Alternatively, the detection result may be sent by the capacity sensor in real time after each time corresponding detection result is obtained, may be sent after waiting for a preset time and calculating an average value in the time, and may be sent only after the capacity of the overflowing electrolyte in the liquid collection container reaches the first capacity threshold.
Alternatively, an error interval may be set based on the first capacity threshold, and a plurality of extraction speeds may be set according to the error interval, so as to achieve adjustability of the extraction speed. For example, an upper error limit and a lower error limit of the error interval are set based on a first capacity threshold, and when the capacity of the overflowed electrolyte in the liquid collecting container reaches the lower error limit of the first capacity threshold, the extraction speed of the overflowed electrolyte in the battery formation process starts to be reduced at a first extraction speed; when the capacity of the overflowing electrolyte in the liquid collecting container reaches a first capacity threshold value, the extraction speed of the overflowing electrolyte in the battery formation process is reduced at a second extraction speed, and the second extraction speed is greater than the first extraction speed; when the capacity of the overflowed electrolyte in the liquid collecting container reaches the error lower limit of the first capacity threshold value, the extraction speed of the overflowed electrolyte in the battery formation process is reduced at a third extraction speed, and the third extraction speed is greater than the second extraction speed.
The execution manner of step S601 is the same as the execution manner of step S301, and is not described herein again.
Step S602, when the volume of the overflowed electrolyte reaches a first volume threshold, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the formation process of the battery, and the first volume threshold is smaller than the critical volume of the overflowed electrolyte when the battery can normally form a passivation film layer in the formation process.
The execution manner of the step S602 is the same as the execution manner of the step S302, and is not described herein again.
In the battery formation method, the error interval is set based on the first capacity threshold, and the plurality of extraction speeds are set according to the error interval, so that the extraction speed can be adjusted, the formation efficiency is improved, and the production cost is reduced.
Fig. 7 is a schematic structural diagram of a battery formation device provided in an embodiment of the present application, and as shown in the figure, based on the battery formation device shown in fig. 2, the battery formation device may further include a first switch 16, where the first switch 16 is disposed between the air outlet of the gas-liquid separator 13 and the negative pressure system 15 to control the open and close states of the air outlet of the gas-liquid separator 13 and the passage where the negative pressure system 15 is located, so as to form a first passage between the battery formation bin 12, the gas-liquid separator 13, the air pressure sensor 14 and the negative pressure system 15, and the controller 11 is electrically connected to the first switch 16.
Alternatively, the first switch 16 may be disposed between the air outlet of the gas-liquid separator 13 and the air pressure sensor 14, or between the air pressure sensor 14 and the negative pressure system 15.
It should be understood that the switch type of the first switch can be selected by those skilled in the art according to actual requirements, and the application is not limited thereto.
In the battery formation equipment, the first switch is arranged between the air outlet of the gas-liquid separator and the negative pressure system, and the controller is electrically connected with the first switch, so that the opening and closing states of the passage where the air outlet of the gas-liquid separator and the negative pressure system are located can be controlled, and the negative pressure can be adjusted.
Fig. 8 is a schematic flow chart of a battery formation method provided in an embodiment of the present application, where the battery formation method may be applied to the battery formation apparatus shown in fig. 7, and as shown in the figure, the battery formation method may include the following steps:
in step S801, the controller controls the first switch to be turned on.
Alternatively, the first switch may be in an off state before step S801 is executed, that is, before the battery formation process is executed, the first switch is switched to an on state when the battery formation method is started to be executed; the on state is also possible.
It should be understood that the negative pressure system is in a state of continuously applying negative pressure, so that the negative pressure system is further controlled to apply negative pressure to the battery formation equipment by arranging the first switch so as to control the liquid loss amount of the electrolyte in the battery formation bin, and the production cost is reduced. And after the controller receives a formation starting instruction for indicating that the formation process is started, the first switch is switched to the on state, so that the interior of the battery formation equipment is in a negative pressure state.
And S802, after the first switch is turned on, the controller controls the negative pressure system to start to extract overflowing electrolyte in the battery formation process.
It should be understood that the above step S802 is used to indicate the start of the formation process.
In step S803, the controller obtains the volume of the overflowing electrolyte collected in the liquid collecting container.
Step S804, when the capacity of the overflowed electrolyte reaches a first capacity threshold, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the formation process of the battery, and the first capacity threshold is smaller than the critical capacity of the overflowed electrolyte when the battery can normally form a passivation film layer in the formation process.
The steps S803 to S804 are identical to the steps S301 to S302, and are not described herein again.
In the battery formation method, the first switch is arranged to further control the negative pressure system to apply negative pressure to the battery formation equipment so as to control the liquid loss amount of the electrolyte in the battery formation bin and reduce the production cost.
Fig. 9 is a schematic flow chart of a battery formation method provided in an embodiment of the present application, where the battery formation method may be applied to the battery formation apparatus shown in fig. 7, and as shown in the figure, the battery formation method may include the following steps:
in step S901, the controller controls the first switch to be switched to an on state.
In step S902, the controller controls the negative pressure system to start introducing air to remove the overflowing electrolyte in the connecting pipeline of the battery formation equipment.
It should be understood that, in the step S902, before the formation process is performed, the first switch is turned on, and the negative pressure system is controlled to introduce air to clean the overflowed electrolyte in the connecting pipeline of the battery formation equipment, in some embodiments, the first switch may be turned off after the cleaning is completed, and the first switch may be turned on after the instruction for starting to extract the overflowed electrolyte is received.
In step S903, the controller controls the negative pressure system to start to extract the overflowed electrolyte in the battery formation process.
It should be understood that the execution time of the step S903 may be after a preset time of introducing air.
In step S904, the controller obtains the volume of the overflow electrolyte collected in the liquid collection container.
Step S905, when the capacity of the overflowed electrolyte reaches a first capacity threshold, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the formation process of the battery, and the first capacity threshold is smaller than the critical capacity of the overflowed electrolyte when the battery can normally form a passivation film layer in the formation process.
The execution manners of the steps S903 to S905 are the same as those of the steps S802 to S804, and are not described herein again.
According to the battery formation method, the first switch is controlled to be turned on before the battery formation process is executed, the negative pressure system is controlled to be introduced with air to clean overflowing electrolyte in a connecting pipeline of the battery formation equipment, and the first switch is turned off after the cleaning is finished, so that the connecting pipeline is cleaned before the battery formation process is executed.
Fig. 10 is a schematic structural diagram of a battery formation device provided in an embodiment of the present application, and as shown in the figure, based on the battery formation device shown in fig. 7, the battery formation device may further include a second switch 17, the second switch 17 is connected in parallel with the first switch 16, and the second switch 17 is connected between the air outlet of the gas-liquid separator 13 and the negative pressure system 15, so as to form a second path between the battery formation bin 12, the gas-liquid separator 13, the air pressure sensor 14, and the negative pressure system 15, and the controller 11 is electrically connected to the second switch 17.
It should be understood that the switch type of the second switch can be selected by those skilled in the art according to actual requirements, and the application is not limited thereto.
In the battery formation equipment, the second switch is arranged between the air outlet of the gas-liquid separator and the negative pressure system, and the controller is electrically connected with the second switch, so that two openable and closable passages are formed between the air outlet of the gas-liquid separator and the negative pressure system, the extraction channel and the ventilation channel are separated, and the negative pressure is further adjustable.
Fig. 11 is a schematic flow chart of a battery formation method provided in an embodiment of the present application, where the battery formation method may be applied to the battery formation apparatus shown in fig. 10, and as shown in the drawing, the battery formation method may include the following steps:
in step S1101, the controller controls the second switch to be turned on.
In step S1102, after the second switch is turned on, the controller controls the negative pressure system to start introducing air, so that the introduced air passes through the second passage to remove the overflowing electrolyte in the connection pipeline of the battery formation equipment.
In step S1103, the controller controls the second switch to be turned off.
It should be understood that, in the above steps S1101 to S1103, before the formation process is performed, the first switch is closed and the second switch is opened in advance, so that the air introduced by the negative pressure system flows into the passage where the second switch is opened, thereby cleaning the overflow electrolyte in the connecting pipe of the battery formation equipment, and the second switch is closed after the cleaning is completed.
In step S1104, the controller controls the first switch to be switched to an on state.
In step S1105, the controller controls the negative pressure system to start to draw the overflowed electrolyte in the battery formation process.
In step S1106, the controller obtains the volume of the overflow electrolyte collected in the liquid collection container.
Step S1107, when the volume of the overflowed electrolyte reaches a first volume threshold, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the formation process of the battery, where the first volume threshold is smaller than the critical volume of the overflowed electrolyte when the passivation film layer can be normally formed on the battery in the formation process.
The execution manners of the steps S1104 to S1107 are the same as those of the steps S801 to S804, and the description thereof is omitted.
In the battery formation method, the first switch is controlled to be closed and the second switch is controlled to be opened before the battery formation process is executed so as to form the ventilation channel, and the first switch is controlled to be opened when the battery formation process is executed so as to form the extraction channel, so that two openable and closable channels are formed between the air outlet of the gas-liquid separator and the negative pressure system, the extraction channel and the ventilation channel are separated, and the negative pressure is further adjustable.
It should be understood that although the steps in the flowcharts of fig. 1 to 11 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1-11 may include multiple sub-steps or multiple stages that are not necessarily performed at the same time, but may be performed at different times, and the order of performing the sub-steps or stages is not necessarily sequential, but may be performed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.
Based on the foregoing embodiments, the present application provides a battery formation device, which includes modules included in the battery formation device and units included in the modules, and can be implemented by a processor; of course, the implementation can also be realized through a specific logic circuit; in implementation, the processor may be a Central Processing Unit (CPU), a Microprocessor (MPU), a Digital Signal Processor (DSP), a Field Programmable Gate Array (FPGA), or the like.
Fig. 12 is the structural schematic diagram of battery ization one-tenth equipment that this application embodiment provided, as shown in fig. 12, battery ization one-tenth equipment includes controller, liquid collecting container, battery ization storehouse, vapour and liquid separator, air pressure sensor and negative pressure system, and the liquid outlet in battery ization storehouse is connected with vapour and liquid separator's inlet, and vapour and liquid separator's liquid outlet is connected with liquid collecting container's inlet, and vapour and liquid separator's gas outlet is connected through air pressure sensor and negative pressure system, and the controller is used for controlling negative pressure system's extraction speed. The controller 11 may include:
a capacity obtaining module 110 for obtaining a capacity of the overflowing electrolyte in the liquid collecting container;
and the extraction speed adjusting module 111 is used for controlling the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the battery formation process when the capacity of the overflowed electrolyte in the liquid collecting container reaches a first capacity threshold value, wherein the first capacity threshold value is smaller than the critical capacity of the overflowed electrolyte in the liquid collecting container when the battery can normally form a passivation film layer in the formation process.
In one embodiment, the controller extraction speed adjustment module 111 may include:
and the negative pressure intensity adjusting submodule is used for controlling the negative pressure system to reduce the negative pressure intensity applied in the formation process.
In one embodiment, the controller 11 may further include:
and the electrolyte cleaning module is used for controlling the negative pressure system to introduce air when the volume of the overflowing electrolyte in the liquid collecting container exceeds a preset second volume threshold value after the formation process is finished so as to clear the overflowing electrolyte in the connecting pipeline of the battery formation equipment.
In one embodiment, a capacity sensor is disposed in the liquid collecting container, and the capacity sensor is configured to detect a capacity of the overflowing electrolyte in the liquid collecting container, and the capacity obtaining module 110 may include:
and the detection result receiving submodule is used for receiving a detection result which is sent by the capacity sensor and used for indicating the capacity of the overflowed electrolyte in the liquid collecting container.
In one embodiment, when a first switch is disposed between the air outlet of the gas-liquid separator and the negative pressure system, the controller may further include:
the first switch control module is used for controlling the first switch to be turned on before the capacity of the overflowing electrolyte in the liquid collection container is obtained;
and the electrolyte extraction module is used for controlling the negative pressure system to start extracting the overflowing electrolyte in the battery formation process after the first switch is turned on.
In one embodiment, the controller 11 may further include:
the electrolyte cleaning module is also used for controlling the negative pressure system to start to introduce air before the negative pressure system starts to extract the overflowed electrolyte in the battery formation process so as to clean the overflowed electrolyte in the connecting pipeline of the battery formation equipment.
In one embodiment, when a second switch is further arranged between the gas-liquid separator and the negative pressure system and the second switch is connected with the first switch in parallel, a second passage between the battery formation bin, the gas-liquid separator, the air pressure sensor and the negative pressure system is formed after the second switch is opened, and the controller further comprises:
the second switch control module is used for controlling the second switch to be switched on before controlling the first switch to be switched on;
the electrolyte cleaning module is also used for controlling the negative pressure system to start introducing air after the second switch is started so that the introduced air passes through the second passage to clean overflowing electrolyte in a connecting pipeline of the battery formation equipment;
and the second switch control module is also used for controlling the second switch to be closed after the second switch is started for a preset time.
The above description of the apparatus embodiments, similar to the above description of the method embodiments, has similar beneficial effects as the method embodiments. For technical details not disclosed in the embodiments of the apparatus of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
It should be noted that, in the embodiment of the present application, the division of the battery formation device into modules is schematic, and is only one logical function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, may also exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. Or may be implemented in a combination of software and hardware.
It should be noted that, in the embodiment of the present application, if the method described above is implemented in the form of a software functional module and sold or used as a standalone product, it may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing an electronic device to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read Only Memory (ROM), a magnetic disk, or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.
An embodiment of the present application provides a computer device, where the computer device may be a server, and an internal structure diagram of the computer device may be as shown in fig. 13. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The database of the computer device is used for storing data. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a battery formation method.
Embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the steps in the methods provided in the above embodiments.
Embodiments of the present application provide a computer program product containing instructions which, when run on a computer, cause the computer to perform the steps of the method provided by the above-described method embodiments.
Those skilled in the art will appreciate that the architecture shown in fig. 13 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, the battery formation method provided by the present application can be implemented in the form of a computer program that can be run on a computer device as shown in fig. 13. The memory of the computer device may store various program modules that make up the battery formation device. The computer program constituted by the respective program modules causes the processor to execute the steps in the battery formation method of the respective embodiments of the present application described in the present specification.
Here, it should be noted that: the above description of the storage medium and device embodiments is similar to the description of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the embodiments of the storage medium, the storage medium and the device of the present application, reference is made to the description of the embodiments of the method of the present application for understanding.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" or "some embodiments" means that a particular feature, structure or characteristic described in connection with the embodiments is included in at least one embodiment of the present application. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" or "in some embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application. The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments. The foregoing description of the various embodiments is intended to highlight various differences between the embodiments, and the same or similar parts may be referred to each other, and for brevity, will not be described again herein.
The term "and/or" herein is merely an association relationship describing an associated object, and means that three relationships may exist, for example, object a and/or object B, may mean: the object A exists alone, the object A and the object B exist simultaneously, and the object B exists alone.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments are merely illustrative, and for example, the division of the modules is only one logical functional division, and other divisions may be realized in practice, such as: multiple modules or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or modules may be electrical, mechanical or other.
The modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules; can be located in one place or distributed on a plurality of network units; some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, all functional modules in the embodiments of the present application may be integrated into one processing unit, or each module may be separately regarded as one unit, or two or more modules may be integrated into one unit; the integrated module can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium includes: various media that can store program codes, such as a removable Memory device, a Read Only Memory (ROM), a magnetic disk, or an optical disk.
Alternatively, the integrated units described above in the present application may be stored in a computer-readable storage medium if they are implemented in the form of software functional modules and sold or used as independent products. Based on such understanding, the technical solutions of the embodiments of the present application or portions thereof that contribute to the related art may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes several instructions for causing an electronic device to execute all or part of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a removable storage device, a ROM, a magnetic or optical disk, or other various media that can store program code.
The methods disclosed in the several method embodiments provided in the present application may be combined arbitrarily without conflict to obtain new method embodiments.
Features disclosed in several of the product embodiments provided in the present application may be combined in any combination to yield new product embodiments without conflict.
The features disclosed in the several method or apparatus embodiments provided in the present application may be combined arbitrarily, without conflict, to arrive at new method embodiments or apparatus embodiments.
The above description is only for the embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (16)
1. A battery formation method is applied to battery formation equipment, the battery formation equipment comprises a liquid collecting container, a negative pressure system and a controller, the negative pressure system is connected with the liquid collecting container, the controller is connected with the negative pressure system, the controller is used for controlling the extraction speed of electrolyte overflowed in the battery formation process by the negative pressure system, and the liquid collecting container is used for collecting the overflowed electrolyte extracted in the battery formation process, and the method comprises the following steps:
the controller obtains the volume of the overflowed electrolyte collected in the liquid collecting container;
when the capacity of the overflowed electrolyte in the liquid collecting container reaches a first capacity threshold value, the controller controls the negative pressure system to reduce the extraction speed of the overflowed electrolyte in the battery formation process, and the first capacity threshold value is smaller than the critical capacity of the overflowed electrolyte in the liquid collecting container when the battery can normally form a passivation film layer in the formation process.
2. The method of claim 1, wherein the first capacity threshold is determined based on a number of cells in a formation process and an initial amount of electrolyte.
3. The method of claim 2, wherein the first capacity threshold is calculated by the formula:
X 0 <a*n*L 0 *b
wherein, X 0 N is the number of batteries in the formation process, L is the first capacity threshold value 0 Is the initial electrolyte amount, b is the theoretical fluid loss coefficient, a is the theoretical fluid loss in the actual formation processA correction constant of the coefficient.
4. The method of any one of claims 1-3, wherein the controller controlling the negative pressure system to reduce a rate of extraction of the spilled electrolyte for a battery formation process comprises:
the controller controls the negative pressure system to reduce the negative pressure applied in the formation process.
5. The method of claim 1, wherein the method further comprises:
after the formation process is finished, when the volume of the overflowed electrolyte in the liquid collecting container exceeds a preset second volume threshold value, the controller controls the negative pressure system to introduce air so as to remove the overflowed electrolyte in a connecting pipeline of the battery formation equipment.
6. The method of claim 1, wherein a volume sensor is disposed in the liquid collection container for detecting a volume of the overflow electrolyte in the liquid collection container, and the controller obtains the volume of the overflow electrolyte in the liquid collection container, comprising:
the controller receives a detection result sent by the capacity sensor and used for indicating the capacity of the overflowed electrolyte in the liquid collecting container.
7. The method of claim 1, wherein the battery formation equipment further comprises a battery formation bin, a gas-liquid separator and a gas pressure sensor, a liquid outlet of the battery formation bin is connected with a liquid inlet of the gas-liquid separator, a liquid outlet of the gas-liquid separator is connected with a liquid inlet of the liquid collecting container, a gas outlet of the gas-liquid separator is connected with the negative pressure system through the gas pressure sensor, a first switch is arranged between a gas outlet of the gas-liquid separator and the negative pressure system, a first passage is formed between the battery formation bin, the gas-liquid separator, the gas pressure sensor and the negative pressure system after the first switch is turned on, and before the controller obtains the volume of the overflowing electrolyte in the liquid collecting container, the method further comprises:
the controller controls the first switch to be turned on;
and after the first switch is turned on, the controller controls the negative pressure system to start to extract the overflowing electrolyte in the battery formation process.
8. The method of claim 7, wherein the controller controls the negative pressure system to begin pumping overflow electrolyte from the battery formation process after the first switch is turned on, the method further comprising:
and the controller controls the negative pressure system to start introducing air so as to remove the overflowing electrolyte in a connecting pipeline of the battery formation equipment.
9. The method of claim 7, further comprising a second switch disposed between the gas-liquid separator and the negative pressure system, the second switch being connected in parallel with the first switch, the second switch being opened to form a second path between the cellularization bin, the gas-liquid separator, the gas pressure sensor, and the negative pressure system, and before the controller controls the first switch to be opened, the method further comprising:
the controller controls the second switch to be turned on;
after the second switch is turned on, the controller controls the negative pressure system to start to introduce air so that the introduced air passes through the second passage to remove the overflowing electrolyte in the connecting pipeline of the battery formation equipment;
and the controller controls the second switch to be closed after the second switch is turned on for a preset time.
10. The utility model provides a battery ization becomes equipment, its characterized in that, battery ization becomes equipment and includes controller, liquid collecting container, battery formation storehouse, vapour and liquid separator, air pressure sensor and negative pressure system, the battery become the liquid outlet in storehouse with vapour and liquid separator's inlet is connected, vapour and liquid separator's liquid outlet with liquid collecting container's inlet is connected, vapour and liquid separator's gas outlet warp air pressure sensor with negative pressure system connects, the controller is used for control negative pressure system's extraction speed, the controller includes:
the capacity obtaining module is used for obtaining the capacity of the overflowing electrolyte in the liquid collecting container;
and the extraction speed adjusting module is used for controlling the negative pressure system to reduce the extraction speed of the overflowing electrolyte in the battery formation process when the capacity of the overflowing electrolyte in the liquid collecting container reaches a first capacity threshold value, wherein the first capacity threshold value is smaller than the critical capacity of the overflowing electrolyte in the liquid collecting container when the battery can normally form a passivation film layer in the formation process.
11. The battery formation apparatus of claim 10, wherein the extraction speed adjustment module comprises:
and the negative pressure intensity adjusting submodule is used for controlling the negative pressure system to reduce the negative pressure intensity applied in the formation process.
12. The battery formation apparatus of claim 10, wherein the controller further comprises:
and the electrolyte cleaning module is used for controlling the negative pressure system to introduce air to clean the overflowing electrolyte in the connecting pipeline of the battery formation equipment when the capacity of the overflowing electrolyte in the liquid collecting container exceeds a preset second capacity threshold value after the formation process is finished.
13. The battery formation apparatus according to claim 10, wherein a capacity sensor for detecting a capacity of the overflow electrolyte in the liquid collection container is provided in the liquid collection container, and the capacity obtaining module includes:
and the detection result receiving submodule is used for receiving a detection result which is sent by the capacity sensor and used for indicating the capacity of the overflowed electrolyte in the liquid collecting container.
14. The battery formation apparatus according to claim 10, wherein when a first switch is provided between the gas-liquid separator outlet and the negative pressure system, the first switch opens to form a first passage between the battery formation bin, the gas-liquid separator, the gas-pressure sensor, and the negative pressure system, and the controller further comprises:
the first switch control module is used for controlling the first switch to be turned on before the capacity of the overflowed electrolyte in the liquid collecting container is obtained;
and the electrolyte extraction module is used for controlling the negative pressure system to start extracting the overflowing electrolyte in the battery formation process after the first switch is turned on.
15. The battery formation apparatus of claim 14, wherein the controller further comprises:
the electrolyte cleaning module is further used for controlling the negative pressure system to start introducing air before controlling the negative pressure system to start extracting the overflowed electrolyte in the battery formation process so as to clean the overflowed electrolyte in a connecting pipeline of the battery formation equipment.
16. The battery formation apparatus according to claim 14, wherein when a second switch is further provided between the gas-liquid separator and the negative pressure system, the second switch being connected in parallel with the first switch, the second switch forming a second path between the battery formation chamber, the gas-liquid separator, the gas pressure sensor, and the negative pressure system after being turned on, the controller further comprises:
the second switch control module is used for controlling the second switch to be turned on before controlling the first switch to be turned on;
the electrolyte cleaning module is further configured to control the negative pressure system to start introducing air after the second switch is turned on, so that the introduced air passes through the second passage to clean the overflowing electrolyte in the connecting pipeline of the battery formation equipment;
the second switch control module is further configured to control the second switch to be turned off after the second switch is turned on for a preset time.
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