CN116613485B - Liquid injection method and liquid injection system for battery - Google Patents
Liquid injection method and liquid injection system for battery Download PDFInfo
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- CN116613485B CN116613485B CN202310873335.3A CN202310873335A CN116613485B CN 116613485 B CN116613485 B CN 116613485B CN 202310873335 A CN202310873335 A CN 202310873335A CN 116613485 B CN116613485 B CN 116613485B
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- 239000007924 injection Substances 0.000 title claims abstract description 650
- 239000007788 liquid Substances 0.000 title claims abstract description 523
- 238000000034 method Methods 0.000 title claims abstract description 153
- 238000007789 sealing Methods 0.000 claims abstract description 150
- 239000003792 electrolyte Substances 0.000 claims abstract description 105
- 239000000945 filler Substances 0.000 claims abstract description 41
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/618—Pressure control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The embodiment of the application provides a liquid injection method and a liquid injection system for a battery. The liquid injection method of the battery comprises the following steps: a sealing element is arranged at a liquid injection port of the battery; penetrating the filler element into the seal such that the filler element passes through the seal and into the interior of the cell; the electrolyte is injected into the battery through the electrolyte injection member, and before the electrolyte is injected into the battery through the electrolyte injection member, the electrolyte injection method further comprises: the internal gas of the battery is discharged through the liquid injection member. In the liquid injection method provided by the embodiment of the application, the liquid injection port of the battery is provided with the sealing element, and the sealing element is pierced by the liquid injection element to enter the battery, so that the liquid injection element can inject liquid in the battery, the problem of electrolyte pollution caused by leakage of electrolyte in the liquid injection process is reduced, and the manufacturing performance of the battery in the liquid injection process and the use reliability of the battery are improved.
Description
Technical Field
The embodiment of the application relates to the field of batteries, and more particularly relates to a liquid injection method and a liquid injection system of a battery.
Background
With the development of the age, the electric automobile has huge market prospect due to the advantages of high environmental protection, low noise, low use cost and the like, can effectively promote energy conservation and emission reduction, and is beneficial to the development and progress of society. For electric vehicles, battery technology is an important factor in the development thereof.
In the development of battery technology, attention is paid to the electric properties such as charge and discharge of a battery, and also to the manufacturing processability of a battery. For example, electrolyte is a composition of a battery, and the injection process of electrolyte into a battery case is also critical to the overall performance of the battery. In view of this, how to improve the manufacturing performance of the battery in the liquid injection process is a technical problem to be solved.
Disclosure of Invention
The embodiment of the application provides a liquid injection method and a liquid injection system for a battery, which can improve the manufacturing performance of the battery in the liquid injection process.
In a first aspect, a method for injecting liquid into a battery is provided, including: a sealing element is arranged at a liquid injection port of the battery; penetrating the filler element into the seal such that the filler element passes through the seal and into the interior of the cell; the electrolyte is injected into the battery through the electrolyte injection member, and before the electrolyte is injected into the battery through the electrolyte injection member, the electrolyte injection method further comprises: the internal gas of the battery is discharged through the liquid injection member.
In the liquid injection method provided by the embodiment of the application, the liquid injection port of the battery is provided with the sealing element, and the sealing element is pierced by the liquid injection element to enter the battery, so that the liquid injection element can inject liquid in the battery, the problem of electrolyte pollution caused by leakage of electrolyte in the liquid injection process is reduced, and the manufacturing performance of the battery in the liquid injection process and the use reliability of the battery are improved. In addition, after the sealing element of the battery is penetrated into the liquid injection element, the liquid injection element can be utilized to discharge gas in the battery, then electrolyte is injected into the battery through the liquid injection element, and the discharged internal gas does not occupy the containing space in the battery, so that the energy density and the product performance of the battery are improved.
In some possible embodiments, the discharging the internal gas of the battery through the liquid injection member includes: the internal gas of the battery is extracted through the liquid injection member so that the internal of the battery forms negative pressure.
Compared with the process that the internal gas of the battery is discharged to the outside through the liquid injection part in a natural state, through the technical scheme of the embodiment, the internal gas of the battery is extracted by utilizing the air extractor, so that the discharge rate of the internal gas of the battery can be improved, and the manufacturing and processing efficiency of the battery is improved. In addition, under the condition that negative pressure is formed in the battery, electrolyte in a normal pressure environment can be quickly injected into the battery through the liquid injection part, so that the liquid injection rate is improved, the manufacturing and processing efficiency of the battery is improved, the possibility of problems such as leakage or splashing of the electrolyte in the liquid injection process can be reduced, and the manufacturing performance of the battery in the liquid injection process is further improved.
In some possible embodiments, the internal gas of the cell comprises a gas generated by the cell during the execution of the closed-cell formation.
In the technical scheme provided by the embodiment, the reaction gas generated in the closed formation process of the battery can be firstly extracted through the liquid injection part, and then the electrolyte is injected into the battery through the liquid injection part, so that on one hand, the capacity of the electrolyte injected into the battery can be increased, the overall performance of the battery is improved, on the other hand, the gas in the battery can be reduced to reduce the internal air pressure of the battery, and the possibility of explosion of the battery is reduced.
In some possible embodiments, the sealing member is made of an elastic material, and after the electrolyte is injected into the battery through the injection member, the injection method further includes: and drawing the liquid injection piece away from the sealing piece, wherein after the liquid injection piece is drawn away, the sealing piece elastically deforms to reduce a notch formed in the sealing piece by the liquid injection piece.
In the technical scheme provided by the embodiment, after the liquid injection part is separated from the sealing part, the elastic deformation of the sealing part can enable the gap in the sealing part to be very small or even negligible, and the very tiny gap basically does not influence the tightness of the battery, so that the sealing part not only can improve the manufacturing performance of the battery in the liquid injection process, but also can be reused as the sealing part of the battery in the normal use process to seal the liquid injection port of the battery. By the technical scheme of the embodiment, the manufacturing performance and the service performance of the battery in the liquid injection process are improved comprehensively.
In some possible embodiments, the piercing of the liquid injection member into the sealing member to allow the liquid injection member to pass through the sealing member into the interior of the battery comprises: a liquid injection safety device is arranged on the battery, and a liquid injection piece channel corresponding to the sealing piece is formed in the liquid injection safety device; the filler piece is pierced into the filler piece channel such that the filler piece pierces the seal through the filler piece channel to enter the interior of the battery.
Through the technical scheme of this embodiment, the battery is furnished with annotates liquid safety device, and this annotates liquid safety device can protect the battery, and annotates the liquid and fill the liquid piece passageway that the liquid safety device was gone up and pierce the sealing member, reduced annotate the liquid piece and thorn the possibility that the off tracking caused the influence to the battery to the manufacturing performance of battery in annotating the liquid in-process and the reliability of use of battery have been promoted.
In some possible embodiments, the priming safety device comprises: a liquid injection safety helmet; wherein, above-mentioned annotate liquid safety device on setting up on the battery includes: and buckling the liquid injection safety cap on the battery.
Through the technical scheme of this embodiment, with annotating liquid safety device design for annotating liquid safety helmet, be favorable to this annotate liquid safety helmet comparatively convenient and reliable fixed setting in the battery, annotate the positional relationship between liquid safety helmet and the battery relatively fixed to make annotate the inside that liquid spare can be comparatively accurate pierces the battery through annotating liquid safety helmet, be favorable to further promoting the manufacturing performance of battery at annotating the liquid in-process.
In some possible embodiments, a first inclined surface guide groove is formed at an end of the liquid injection member channel away from the battery, and an inclined surface of the first inclined surface guide groove is inclined relative to an axial direction of the liquid injection member channel, and the first inclined surface guide groove is used for guiding the liquid injection member into the liquid injection member channel.
Through the technical scheme of the embodiment, the diameter of the liquid injection part channel at the inlet end (namely, the end of the liquid injection part channel far away from the battery) can be enlarged, so that the liquid injection part can conveniently and smoothly enter the liquid injection part channel, the probability of blocking of the liquid injection part at the inlet end of the liquid injection part channel is reduced, and the manufacturing performance of the battery in the liquid injection process is further improved.
In some possible embodiments, the first beveled guide groove comprises a beveled guide groove.
Through the technical scheme of this embodiment, design the first inclined plane guide way into the conical surface guide way, can make this first inclined plane guide way have smooth surface to be convenient for play good guide effect to annotate the liquid spare, further reduce annotate the liquid spare and take place the probability of card to stop in annotating liquid spare passageway department, promote the manufacturing performance of battery at annotating the liquid in-process.
In some possible embodiments, the end of the injection safety helmet buckled on the battery is provided with a second inclined plane guide groove, the inclined plane of the second inclined plane guide groove is inclined relative to the wall of the battery, and the second inclined plane guide groove is used for guiding the battery to be buckled on the injection safety helmet.
Through the technical scheme of the embodiment, the second inclined plane guide groove can enlarge the inner diameter of the liquid injection safety helmet, so that the battery is allowed to have larger displacement allowance, and even if the battery has certain position offset compared with the liquid injection safety helmet, the liquid injection safety helmet can be smoothly buckled on the battery through the second inclined plane guide groove, and the production efficiency of the battery in the liquid injection process is further improved.
In some possible embodiments, the second beveled guide groove comprises a beveled guide groove.
Through the technical scheme of this embodiment, design the second inclined plane guide way into the conical surface guide way, can make this second inclined plane guide way have smooth surface to be convenient for play good guide effect to the battery, make the battery can be reliable and stable with annotate the mutual lock of liquid safety helmet, further promote the manufacturing performance of battery at annotating the liquid in-process.
In some possible embodiments, the material of the priming safety device comprises a high molecular polymer.
According to the technical scheme, the injection safety device manufactured by the high-molecular polymer can have better wear resistance, higher strength and higher corrosion resistance, so that the injection safety device can be stably and reliably applied to the injection process of the battery, plays a role in safety protection of the battery, and simultaneously has less abrasion and influence on the battery.
In some possible embodiments, the method of priming further comprises: and detecting the end part of the liquid injection piece. In the case that the liquid injection member includes a liquid injection needle, the liquid injection method further includes: the needle of the syringe is inspected.
According to the technical scheme, in the process of filling the battery, the filling piece is used for penetrating the sealing piece of the battery to fill the battery, and the end part of the filling piece, such as the needle head of the filling needle, is detected. When the end part of the liquid injection part is problematic, the liquid injection part can be replaced in time, so that the liquid injection process of a plurality of batteries in the battery production line can be reliably executed, and the manufacturing performance of the plurality of batteries in the battery production line in the liquid injection process can be further improved.
In some possible embodiments, the detecting an end of the liquid injection member includes: controlling the liquid injection piece to move along a preset moving path, wherein a first sensor is arranged in the preset moving path; the movement of the end of the syringe is detected by a first sensor to detect whether the end of the syringe is complete.
Through the technical scheme of this embodiment, set up first sensor to annotating the liquid spare, this first sensor can be used for detecting the tip integrality of annotating the liquid spare, reduces the influence that the notes liquid process that causes the battery when the tip of annotating the liquid spare appears missing, for example, reduces the syringe needle and does cause the possibility that can't impale the sealing member to the syringe needle, and/or reduces the influence that the metal particle thing caused to the battery that drops of annotating the liquid spare that lacks.
In some possible embodiments, the first sensor is disposed at an end point of the preset moving path; wherein, above-mentioned use the first sensor to detect the removal of annotating the tip of liquid spare in order to detect annotating whether the tip of liquid spare is complete, include: detecting that the end of the liquid injection piece is complete under the condition that the end of the liquid injection piece contacts the first sensor; and detecting that the end of the liquid filling member is missing under the condition that the end of the liquid filling member is not contacted with the first sensor.
By means of the technical scheme of the embodiment, the first sensor can effectively and reliably detect the end integrity of the liquid injection piece by detecting the contact of the end of the liquid injection piece. On the basis, the structure of the first sensor is easy to realize and high in reliability, and the cost of the end part detection device of the liquid injection part is reduced, so that the production line cost of the battery is reduced.
In some possible embodiments, the first sensor is disposed downstream of the preset movement path; wherein, above-mentioned use the first sensor to detect the removal of annotating the tip of liquid spare in order to detect whether the tip is complete, include: detecting that the end part of the liquid injection piece is complete under the condition that the moving stroke of the end part of the liquid injection piece is larger than or equal to a preset threshold value; and detecting the end missing of the liquid injection piece under the condition that the moving stroke of the end of the liquid injection piece is smaller than a preset threshold value.
Through the technical scheme of this embodiment, first sensor can be through detecting the displacement stroke of annotating the tip of liquid spare and play effectual and reliable detection to annotating the tip integrality of liquid spare. On this basis, the first sensor can also be convenient for further detect the tip degree of lacking of annotating the liquid spare to play more comprehensive detection effect to annotating the liquid spare.
In some possible embodiments, the detecting an end of the liquid injection member includes: controlling the liquid injection piece to move along a preset moving path, wherein a second sensor is arranged in the preset moving path, and a detection channel for passing through the liquid injection piece is formed in the second sensor; and detecting whether the end part of the liquid injection part is askew or not by using a detection channel in the second sensor.
According to the technical scheme of the embodiment, the second sensor is arranged on the liquid injection part and can be used for detecting whether the end part of the liquid injection part is askew or not, so that the influence on the liquid injection process of the battery when the end part of the liquid injection part is askew is reduced, for example, the possibility that a askew liquid injection needle cannot pierce the sealing part is reduced.
In some possible embodiments, the detecting whether the end of the pouring member is skewed by the detection channel in the second sensor includes: detecting that the end of the liquid injection member is askew in a case where the end of the liquid injection member contacts the inner peripheral surface of the detection channel; in the case where the end portion of the liquid injection member does not contact the inner peripheral surface of the detection passage, the end portion of the liquid injection member is detected as not being skewed.
According to the technical scheme of the embodiment, the second sensor can effectively and reliably detect the end skew of the liquid injection piece by detecting the contact of the end of the liquid injection piece. On the basis, the structure of the second sensor is easy to realize and high in reliability, and the cost of the end part detection device of the liquid injection part is reduced, so that the production line cost of the battery is reduced.
In some possible embodiments, the predetermined movement path is the same as the injection movement path when the injection member injects the battery.
Through the technical scheme of the embodiment, the liquid injection part can only have the same moving path, and the liquid injection of the liquid injection part to the battery and the detection of the liquid injection part by the detection device (comprising the first sensor and/or the second sensor) can be completed, so that the control mode of the liquid injection part is simpler and easy to realize. In addition, the same moving path is adopted in the liquid injection process and the detection process of the liquid injection piece, so that the position of a sensor in the detection device can be conveniently adjusted according to the different sizes and the shape adaptability of the battery, and therefore the liquid injection piece can be conveniently and conveniently injected into the batteries with different sizes and shapes, and the detection device can be used for detecting the liquid injection piece.
In some possible embodiments, the material of the seal comprises rubber.
Through the technical scheme of the embodiment, the sealing element can have better sealing performance, better elasticity and certain hardness, can resist certain external force influence while playing a good sealing role on the liquid injection port of the battery, and realizes self-healing after the liquid injection element is pulled away. The seal may have better application properties during battery manufacturing.
In some possible embodiments, the thickness of the seal in the middle region is less than the thickness of the seal in the edge region.
Through the technical scheme of this embodiment, the weak portion that is less at the regional design thickness in middle part of sealing member can make annotate the weak portion that the sealing member was impaled in order to get into the inside of battery that the liquid piece can be more quick and reliable to further promote the notes liquid efficiency of battery.
In some possible embodiments, the seal is formed with a first groove in a first surface of the middle region, the first surface being a surface of the seal facing the outside of the cell; and/or the sealing member is formed with a second groove at a second surface of the middle region, the second surface being a surface of the sealing member facing the inside of the battery.
In the technical scheme of the embodiment, the weak part with smaller thickness can be arranged in the sealing element by arranging the groove on at least one surface of the sealing element, and the technical scheme is easy to realize and has higher controllability. In addition, set up first recess at the first surface of the outside of sealing member towards the battery, this first recess can play the location effect to annotating the liquid spare, annotates the weak area in sealing member middle part through this first recess that the liquid spare can be more accurate.
In a second aspect, there is provided a liquid injection system for a battery, comprising: the sealing element mounting device is used for acquiring the sealing element and arranging the sealing element at the liquid injection port of the battery; a liquid injection member for penetrating the sealing member to enter the inside of the battery; and the electrolyte injection device is connected with the electrolyte injection piece and is used for injecting electrolyte into the battery through the electrolyte injection piece.
In some possible embodiments, the priming system further comprises: the liquid injection safety device is arranged on the battery; the liquid injection safety device is provided with a liquid injection part channel corresponding to the sealing part, and the liquid injection part channel is used for passing through the liquid injection part, so that the liquid injection part penetrates into the sealing part through the liquid injection part channel to enter the interior of the battery.
In some possible embodiments, the priming safety device comprises: the liquid injection safety cap is buckled on the battery.
In some possible embodiments, the priming system further comprises: the liquid injection detection device is used for detecting the end part of the liquid injection piece.
In some possible embodiments, the priming member is configured to move along a predetermined path of movement, the priming detection device comprising: the first sensor is arranged towards the end part of the liquid injection piece and is positioned in a preset moving path, and the first sensor is used for detecting the movement of the end part of the liquid injection piece so as to detect whether the end part is complete.
In some possible embodiments, the priming member is configured to move along a predetermined path of movement, the priming detection device comprising: the second sensor is provided with a detection channel corresponding to the liquid injection piece, the detection channel is positioned in a preset moving path, and the detection channel is used for detecting whether the end part of the liquid injection piece is askew or not through the liquid injection piece.
In the liquid injection method provided by the embodiment of the application, the liquid injection port of the battery is provided with the sealing element, and the sealing element is pierced by the liquid injection element to enter the battery, so that the liquid injection element can inject liquid in the battery, the problem of electrolyte pollution caused by leakage of electrolyte in the liquid injection process is reduced, and the manufacturing performance of the battery in the liquid injection process and the use reliability of the battery are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a battery according to an embodiment of the present application;
FIG. 2 is a schematic flow chart diagram of a method for filling a battery according to an embodiment of the present application;
fig. 3 is a schematic structural diagram corresponding to step S201 shown in fig. 2;
fig. 4 is a schematic structural diagram corresponding to step S202 shown in fig. 2;
FIG. 5 is an enlarged partial view of portion A of the embodiment of FIG. 4;
FIG. 6 is a schematic flow chart diagram of another method for filling a battery according to an embodiment of the present application;
FIG. 7 is a schematic flow chart diagram of another method for filling a battery according to an embodiment of the present application;
fig. 8 is a schematic structural diagram corresponding to steps S402 and S403 shown in fig. 7;
FIG. 9 is a schematic cross-sectional view of the battery shown in FIG. 8 in the direction B-B';
FIG. 10 is a schematic enlarged cross-sectional view of the injection safety device of the embodiment of FIGS. 8 and 9;
FIG. 11 is another schematic enlarged cross-sectional view of a priming safety device provided in an embodiment of the present application;
FIG. 12 is a schematic flow diagram of another method for filling a battery according to an embodiment of the present application;
FIG. 13 is a schematic view of a first sensor and a liquid injector according to an embodiment of the present application;
FIG. 14 is a schematic diagram of a second sensor and a liquid injector according to an embodiment of the present application;
FIG. 15 is a schematic view of a first sensor, a second sensor and a liquid filling member according to an embodiment of the present application;
FIG. 16 is a schematic flow diagram of another method for filling a battery according to an embodiment of the present application;
fig. 17 is a schematic block diagram of a battery liquid injection system according to an embodiment of the present application.
In the drawings, the drawings are not drawn to scale.
Reference numerals illustrate:
100-cell; 110-a housing; 120-electrode assembly, 121-tab; 130-end cap assembly, 1301-negative end cap, 1302-positive end cap, 1311-electrode terminal, 1312-liquid injection port; 140-seals, 141-first grooves, 142-second grooves;
200-filling safety device; 210-a liquid injection part channel, 220-a first inclined plane guide groove, 230-a second inclined plane guide groove, 240-a first accommodating groove, 250-a second accommodating groove and 260-an air guide groove;
300-liquid injection piece;
400-liquid injection detection device; 410-first sensor, 420-second sensor, 421-detection channel, 430-processing module;
500-seal mounting means;
600-priming device;
1-a liquid injection system of a battery.
Detailed Description
Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.
In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.
The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.
The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: there are three cases, a, B, a and B simultaneously. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.
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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.
In the field of new energy, batteries are of self-evident importance as a main power source for electric devices, such as electric vehicles, ships, spacecraft, or the like. In the present application, the battery may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, to which the embodiment of the present application is not limited. In some related art, the battery may also be referred to as a battery cell (battery cell) or a battery cell. In particular implementations, one or more batteries may constitute a battery module or battery pack (battery pack) to provide higher voltage and capacity to the powered device. Alternatively, the battery pack may include a case for enclosing one or more batteries. The case can reduce the influence of liquid or other foreign matter on the charge or discharge of the battery.
In the present application, the battery may have a cylindrical shape, a flat shape, a rectangular shape, or other shapes, etc., which are not limited in the embodiment of the present application. In addition, batteries are generally divided into three types in a packaged manner: cylindrical batteries, square batteries, and pouch batteries, which are not limited in this embodiment of the application.
Various design factors are considered in the development of battery technology, for example, in order to improve the charge and discharge performance of the battery, various performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate and the like of the battery are considered. In addition, the manufacturing efficiency and the manufacturing performance of the battery are also important for popularization, application and long-term development of the battery.
The battery generally includes a case, an electrode assembly, and an electrolyte, wherein the case is operable to accommodate the electrode assembly, which is composed of a positive electrode sheet, a negative electrode sheet, and a separator, and the electrolyte, as an electrolyte, can conduct ions between the positive electrode sheet and the negative electrode sheet of the electrode assembly, thereby achieving normal operation of the battery. For lithium batteries, the electrolyte may include lithium salts, organic solvents, and the like.
In the process of manufacturing a battery, a process of injecting an electrolyte into a housing of the battery is also an important process, and the manufacturing performance of the injection process affects the final product performance of the battery. In some related technologies, in the process of injecting the liquid into the battery, an injection tool (such as an injection nozzle) is used to be arranged at the edge of the liquid injection port of the battery, the liquid is injected into the liquid injection port of the battery through the injection tool, and under the condition that the injection tool is not in good contact with the edge of the liquid injection port, the risk of liquid leakage possibly exists in the process of injecting the liquid, so that the problem of electrolyte pollution is generated, and the manufacturing of the subsequent battery and the product performance of the battery are affected.
In view of this, an embodiment of the present application provides a new method for injecting liquid into a battery, including: the electrolyte injection device comprises a battery, a sealing piece, an electrolyte injection device and a battery, wherein the sealing piece is arranged at an electrolyte injection port of the battery, the electrolyte injection device is penetrated into the battery through the sealing piece, and electrolyte is injected into the battery through the electrolyte injection device. In the liquid injection method provided by the embodiment of the application, the liquid injection port of the battery is provided with the sealing element, and the sealing element is pierced by the liquid injection element to enter the battery, so that the liquid injection element can inject liquid in the battery, the problem of electrolyte pollution caused by leakage of electrolyte in the liquid injection process is reduced, and the liquid injection production performance of the battery and the use reliability of the battery are improved.
The technical scheme described by the embodiment of the application is suitable for various devices using batteries, such as electric vehicles, battery cars, electric tools, ships, spacecrafts and the like, wherein the spacecrafts comprise planes, rockets, spacecrafts, spacecraft and the like. It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described devices, but may be applied to all devices using batteries.
Fig. 1 shows a schematic structure of a battery 100 according to an embodiment of the present application.
As shown in fig. 1, battery 100 includes a case 110, an electrode assembly 120, and an end cap assembly 130. The housing 110 and the end cap assembly 130 form an outer shell or battery compartment. The housing 110 may be formed of metal (e.g., aluminum). The case 110 is dependent on the shape of the one or more electrode assemblies 120 combined. For example, the housing 110 may be a hollow cylinder as shown in fig. 1.
The case 110 has an opening, the electrode assembly 120 is received in the case 110, and the cap assembly 130 is used to cover the opening to receive the electrode assembly 120 in the case 110. Housing and protection of the electrode assembly 120 and other components is achieved through the case 110 and the cap assembly 130. The housing 110 is filled with an electrolyte, i.e., an electrolytic solution.
In the battery 100 provided in the embodiment of the present application, the electrode assemblies 120 may be provided in a single or a plurality according to actual use requirements, for example, 1 electrode assembly 120 is provided in the battery 100 in the embodiment shown in fig. 1.
With continued reference to fig. 1, end cap assembly 130 includes a negative end cap 1301 and a positive end cap 1302, which cover the opening of housing 110 from both ends of housing 110, respectively, to cap electrode assembly 120 within housing 110. Negative electrode end cap 1301 has a negative electrode terminal and positive electrode end cap 1302 has a positive electrode terminal. The electrode assembly 120 is provided with a tab 121, wherein a positive electrode terminal is electrically connected with a positive electrode tab of the electrode assembly 120, and a negative electrode terminal is electrically connected with a negative electrode tab of the electrode assembly 120.
In addition to the electrode terminals, the negative electrode end cover 1301 or the positive electrode end cover 1302 is provided with a liquid filling port 1312, and for example, in the embodiment shown in fig. 1, the central portion of the negative electrode end cover 1301 may be provided with the liquid filling port 1312. During the injection process of the battery 100, an external injection tool may be provided at the injection port 1312 to inject the electrolyte into the battery 100.
It should be noted that, in the battery 100 provided in the embodiment of the present application, the end cap assembly 130 may be provided with other battery components, such as a pressure release mechanism, besides the electrode terminal and the liquid injection port, and the specific composition structure of the battery 100 is not limited in the embodiment of the present application.
In addition, the battery 100 shown in fig. 1 is illustrated as a cylindrical battery, and the battery provided by the present application may be a prismatic battery, or a battery of other shape, in which the constituent parts may be similar to the battery 100 shown in fig. 1 above, and the casing of the prismatic battery may be a hollow prismatic casing.
Fig. 2 shows a schematic flow diagram of a method 20 for filling a battery according to an embodiment of the application. Alternatively, the injection method 20 may be applied to the battery 100 shown in fig. 1.
As shown in fig. 2, the battery priming method 20 may include the following steps.
S201: a sealing member is provided at the liquid inlet of the battery.
S202: the liquid injection member is pierced into the seal member such that the liquid injection member passes through the seal member into the interior of the battery.
S203: electrolyte is injected into the battery through the injection member.
Specifically, the method 20 may be performed by a device for injecting liquid in a battery production line, where one or more related devices or components may be included in the device for injecting liquid to perform a plurality of steps in the method 20.
For convenience of explanation and understanding, fig. 3 shows a schematic structural diagram corresponding to step S201 shown in fig. 2.
As shown in fig. 3, in step S201, a seal 140 is provided at a liquid filling port 1312 (not shown in fig. 3) of the battery 100. Specifically, this step S201 may be performed by a seal mounting device in the battery production line, which may take the seal 140 and mount it to the liquid filling port 1312 provided in the battery 100 after the battery 100 enters the target station.
The sealing member 140 is a structural member having a sealing effect, and has a shape and size that can be adapted to the liquid injection port 1312 of the battery 100, so as to perform a good sealing function on the liquid injection port 1312 of the battery 100. In addition, the sealing member 140 may have a certain hardness, so as to improve the service performance of the sealing member 140 and reduce the influence of external stress on the sealing member 140.
By way of example and not limitation, the material of the seal 140 may include rubber. Alternatively, in other alternative embodiments, the seal 140 may be made of other materials having a sealing effect and a certain hardness.
In some implementations, the seal 140 can be a glue spike. The seal 140 may be approximately nail-shaped in shape with a nut and a shank. The glue nail can be easily and stably installed at the liquid injection port 1312 of the battery 100 to have a good sealing effect on the battery 100.
Fig. 4 shows a schematic structural diagram corresponding to step S202 shown in fig. 2. Fig. 4 may be a schematic cross-sectional view of the battery 100 shown in fig. 3 along the direction A-A'.
As shown in fig. 4, in step S202, the filler 300 may penetrate and pass through the sealing member 140 so as to enter the interior of the battery 100 through the filler port 1312 where the sealing member 140 is located.
Alternatively, in the embodiment of the present application, the liquid injection member 300 may be, for example, a liquid injection needle, a liquid injection tube, or the like. The syringe channel 210 may be a needle channel or a tube channel, etc. corresponding to the syringe 300.
In some implementations, the injection molding 300 may be vertically movable, and the tip of the injection molding 300 may vertically penetrate the sealing member 140 at the top end of the battery 100, thereby entering the interior of the battery 100. The inside of the battery 100 may be formed with a channel to facilitate the entry of the injection member 300, and the injection member 300 does not damage the electrode assembly inside the battery 100.
In step S203, the battery production line may be provided with a liquid injection device that can inject an electrolyte into the inside of the battery 100 through the liquid injection member 300. Alternatively, the electrolyte injection device may be understood as an electrolyte supply device connected to the electrolyte injection member 300, the electrolyte injection member 300 having an electrolyte injection passage formed therein, and the electrolyte in the electrolyte injection device flowing into the interior of the battery 100 through the electrolyte injection passage in the electrolyte injection member 300. Optionally, a switch may be disposed at the connection between the priming device and the priming member 300, where the priming device and the priming channel in the priming member 300 are in communication with each other when the switch is controlled to open, and where the priming device and the priming channel in the priming member 300 are turned off when the switch is controlled to close.
In the liquid injection method provided by the embodiment of the application, the liquid injection port 1312 of the battery 100 is provided with the sealing element 140, and the sealing element 140 is pierced by the liquid injection element 300 to enter the battery 100, so that the liquid injection element 300 can inject liquid in the battery 100, thereby reducing the problem of electrolyte pollution caused by leakage of electrolyte in the liquid injection process, and improving the manufacturing performance of the battery 100 in the liquid injection process and the use reliability of the battery 100.
Fig. 5 shows a partial enlarged view of the portion a of the embodiment of fig. 4.
As shown in fig. 5, in some embodiments, the thickness of the seal 140 in the middle region may be less than the thickness of the seal 140 in the edge region.
In particular, in this embodiment, the sealing member 140 is not a uniform thickness structural member having a weak portion of a small thickness therein, which is easily pierced by the external electrolyte injection member 300, thereby enabling the electrolyte injection member 300 to rapidly enter the inside of the battery 100. Alternatively, the weakened portion may be located in a central region of the sealing member 140, and in particular, the weakened portion may be located in a central region of the sealing member 140 in a first direction, which is a radial direction of the filling port 1312.
In the case where the seal 140 is in a spike-like configuration, the thickness of the spike in the seal 140 may be less in the central region than in the edge region.
Through the technical scheme of the embodiment, the weak part with smaller thickness is designed in the middle area of the sealing member 140, so that the injection member 300 can more quickly and reliably pierce the weak part of the sealing member 140 to enter the interior of the battery 100, thereby further improving the injection efficiency of the battery 100.
With continued reference to fig. 5, the sealing member 140 may be optionally formed with a first groove 141 at a first surface of the middle region, which is a surface of the sealing member 140 facing the outside of the battery 100; and/or, the sealing member 140 is formed with a second groove 142 at a second surface of the middle region, which is a surface of the sealing member 140 facing the inside of the battery 100.
Alternatively, the first groove 141 and the second groove 142 may be arc-shaped grooves, so as to reduce the probability of the injection member 300 getting stuck in the grooves.
In the technical solution of this embodiment, the weak portion with smaller thickness may be provided in the sealing member 140 by providing the groove on at least one surface of the sealing member 140, which is easy to implement and has higher controllability. In addition, a first groove 141 is provided on a first surface of the sealing member 140 facing the outside of the battery 100, and the first groove 141 can provide a positioning effect on the injection member 300, so that the injection member 300 can more precisely pierce the weak area in the middle of the sealing member 140 through the first groove 141.
Fig. 6 shows a schematic flow diagram of another battery priming method 30 according to an embodiment of the present application. Alternatively, the liquid injection method 30 is equally applicable to the battery 100 shown in the above embodiment.
As shown in fig. 6, the battery priming method 30 may include the following steps.
S301: a sealing member is provided at the liquid inlet of the battery.
S302: the liquid injection member is pierced into the seal member such that the liquid injection member passes through the seal member into the interior of the battery.
S303: the internal gas of the battery is discharged through the liquid injection member.
S304: electrolyte is injected into the battery through the injection member.
Specifically, in the embodiment of the present application, steps S301, S302 and S304 may be referred to the related description of the embodiment shown in fig. 2, which is not repeated here.
In step S303, before the electrolyte is injected into the interior of the battery 100 by the electrolyte injection device through the electrolyte injection member 300, the internal gas of the battery 100 may also be discharged to the outside of the battery 100 through the electrolyte injection member 300. Specifically, the injection member 300 may have a channel formed therein, which may be either an exhaust channel or an injection channel, through which the internal gas of the battery 100 may be exhausted before the electrolyte enters the interior of the battery 100.
Alternatively, the internal gas of the battery 100 may be a gas generated during the pre-processing of the battery 100, which occupies the internal space of the battery 100, affects the effective accommodating space in the battery 100, for example, affects the space for accommodating the electrolyte in the battery 100, thereby affecting the energy density and product performance of the battery 100, and the like.
In view of this, according to the technical solution of the embodiment of the present application, after the sealing member 140 of the battery 100 pierces the liquid injection member 300, the gas inside the battery 100 can be exhausted by the liquid injection member 300 first, and then the electrolyte is injected into the battery 100 through the liquid injection member 300, so that the exhausted internal gas does not occupy the accommodating space inside the battery 100, which is beneficial to improving the energy density and the product performance of the battery 100.
Optionally, in some embodiments, the step S303 may include: the internal gas of the battery is extracted through the liquid injection member so that the internal of the battery forms negative pressure.
Specifically, in this embodiment, an air extraction device may be further disposed in the battery production line, and the air extraction device may be connected to the injection member 300 and extract the internal gas of the battery 100 through the injection member 300. Compared with the process of discharging the internal gas of the battery 100 to the outside through the injection member 300 in a natural state, the discharge rate of the internal gas of the battery 100 can be improved by pumping the internal gas of the battery 100 through the pumping device, thereby improving the manufacturing efficiency of the battery 100.
In addition, the inside of the battery 100 may be made negative by drawing the inside gas of the battery 100, that is, the inside gas pressure of the battery 100 is lower than the atmospheric pressure (also referred to as normal pressure). Under the condition that negative pressure is formed in the battery 100, electrolyte in a normal pressure environment can be quickly injected into the battery 100 through the liquid injection piece 300, so that the liquid injection rate is improved, the manufacturing and processing efficiency of the battery 100 is improved, the possibility of problems such as leakage or splashing of the electrolyte in the liquid injection process can be reduced, and the manufacturing performance of the battery 100 in the liquid injection process is further improved.
Alternatively, in some possible embodiments, the internal gas of the battery 100 may include: the cell 100 performs a closed-cell formation process to generate gas.
Specifically, in this embodiment, after step S301, the inside of battery 100 is in a sealed state. The battery 100 may enter a formation station where a closed-cell formation process is performed. In the closed formation process, the battery 100 may be subjected to a charge-discharge process to activate active materials inside the battery 100, so that the battery 100 is activated to facilitate a subsequent normal charge-discharge operation of the battery 100.
In the closed formation process, a certain reaction gas is generated by the chemical reaction occurring in the battery 100, and the reaction gas affects the internal accommodating space of the battery 100 to a greater extent, and also causes a greater internal air pressure of the battery 100, thereby increasing the possibility of explosion of the battery 100.
In view of this, in the embodiment of the present application, the reaction gas generated in the process of closing the opening of the battery 100 may be extracted by the liquid injection member 300, and then the electrolyte is injected into the battery 100 by the liquid injection member 300, so that on one hand, the capacity of the electrolyte injected into the battery 100 may be increased, the overall performance of the battery 100 may be improved, and on the other hand, the gas in the battery 100 may be reduced to reduce the internal gas pressure of the battery 100, thereby reducing the possibility of explosion of the battery 100.
In the embodiment of the present application, during the process of performing the closed-end formation of the battery 100, a portion of the electrolyte may be injected into the battery 100 in advance, and after the battery 100 performs the closed-end formation and the internal gas of the battery 100 is extracted, the remaining electrolyte may be injected into the battery 100.
Alternatively, in the embodiment shown in fig. 6, before step S303, after the injection member 300 pierces the sealing member 140, the injection device may inject a portion of the electrolyte into the interior of the battery 100 through the injection member 300, and then the injection member 300 withdraws from the sealing member 140, the battery 100 enters the closed-end formation station to perform the closed-end formation, and the injection member 300 pierces the sealing member 140 again, and in step S303, the gas extraction device may withdraw the internal gas of the battery 100 including the reaction gas generated during the closed-end formation of the battery 100 through the injection member 300. In step S304, the electrolyte injection device may inject another portion of the electrolyte into the interior of the battery 100 through the electrolyte injection member 300 to complete the electrolyte injection process of the battery 100.
In some embodiments, the sealing member 140 may be an elastic material, and the liquid injection method 20 or the liquid injection method 30 may further include, after the step S203 in fig. 2 or the step S304 in fig. 6: and drawing the liquid injection piece away from the sealing piece, wherein after the liquid injection piece is drawn away, the sealing piece elastically deforms to reduce a notch formed in the sealing piece by the liquid injection piece.
Specifically, in this embodiment, the sealing member 140 is an elastic material capable of elastic deformation, which can be pierced by the liquid injection member 300, and can automatically elastically deform to "heal" the gap formed by the piercing of the liquid injection member 300 after the liquid injection member 300 is pulled away.
As in the previous embodiments, the material of the seal 140 may include rubber, which has a preferred elastic deformation property.
After the liquid filling member 300 is pulled away from the sealing member 140, the elastic deformation of the sealing member 140 can make the gap in the sealing member 140 very small or even negligible, and the very small gap does not substantially affect the sealability of the battery 100, so that the sealing member 140 can not only improve the manufacturing performance of the battery 100 in the liquid filling process, but also can be reused as a sealing member of the battery 100 in the normal use process to seal the liquid filling port 1312 of the battery 100. By the technical scheme of the embodiment, the manufacturing performance and the service performance of the battery 100 in the liquid injection process are improved comprehensively.
Fig. 7 shows a schematic flow diagram of another battery priming method 40 according to an embodiment of the present application. Alternatively, the liquid injection method 40 is equally applicable to the battery 100 shown in the above embodiment.
As shown in fig. 7, the battery priming method 40 may include the following steps.
S401: a sealing member is provided at the liquid inlet of the battery.
S402: a liquid injection safety device is arranged on the battery, and a liquid injection part channel corresponding to the sealing part is formed in the liquid injection safety device.
S403: the filler piece is pierced into the filler piece channel such that the filler piece pierces the seal through the filler piece channel to access the interior of the battery.
S404: the internal gas of the battery is discharged through the liquid injection member.
S405: electrolyte is injected into the battery through the injection member.
Specifically, in the embodiment of the present application, steps S401, S404 and S405 may be referred to the related description of the embodiment shown in fig. 6, and are not repeated here. Steps S402 and S403 may be one implementation of step S302 shown in fig. 6 above.
For convenience of explanation and understanding, fig. 8 and 9 show a schematic structural diagram corresponding to steps S402 and S403 shown in fig. 7. Fig. 9 is a schematic cross-sectional view of the battery 100 shown in fig. 8 in the direction B-B'.
As shown in fig. 8 and 9, a liquid injection safety device 200 is provided on the battery 100, and a liquid injection passage 210 corresponding to the sealing member 140 on the battery 100 is formed in the liquid injection safety device 200. The filler 300 may penetrate the filler channel 210 in the filler safety device 200 into the sealing member 140 and into the interior of the battery 100.
In step S402, the battery production line may be configured with a control device for the liquid injection safety device, which may control the liquid injection safety device 200 to be disposed on the wall of the liquid injection port 1312 of the battery 100, and after the liquid injection safety device 200 is disposed on the battery 100, the liquid injection passage 210 in the liquid injection safety device 200 may correspond to the sealing member 140 at the liquid injection port 1312. In some implementations, the seal 140 may be disposed at a port of the injector channel 210.
In step S403, the injector 300 may move in the vertical direction into the injector channel 210 to reach the sealing member 140 at the channel opening of the injector channel 210, and after the injector 300 pierces the sealing member 140, the injector may enter the interior of the battery 100 to realize the subsequent discharge of the gas inside the battery 100 and the injection of the electrolyte into the interior of the battery 100.
According to the technical scheme of the embodiment of the application, the battery 100 is provided with the liquid injection safety device 200. In the process of filling the battery 100, the filler 300 does not directly pierce the battery 100, but first passes through the filler channel 210 in the filler safety device 200 and then pierces the sealing member 140 corresponding to the filler channel 210. Compared with the method that the liquid injection member 300 is directly used to pierce the sealing member 140, the liquid injection member 300 may be pierced to affect the performance of other components (such as electrode terminals, etc.) in the battery 100, in the technical scheme provided by the embodiment of the application, the liquid injection safety device 200 is used to protect the battery 100, and the liquid injection member 300 can more accurately pierce the sealing member 140 through the liquid injection member channel 210, so that the possibility of the influence of the liquid injection member 300 piercing to the battery 100 is reduced, and the manufacturing performance of the battery 100 in the liquid injection process and the use reliability of the battery 100 are improved.
In some possible embodiments, referring to fig. 8 and 9, the injection safety device 200 may include an injection safety cap, and the step S402 may include: and buckling the liquid injection safety cap on the battery.
Specifically, in this embodiment, the injection safety cap may include a cover and an annular wall, where the cover is disposed corresponding to the wall of the injection port 1312 in the battery 100, the annular wall is connected to a side of the cover facing the battery 100, and the annular wall may be disposed around the battery 100 after the injection safety cap is fastened to the battery 100.
The liquid injection channel 210 is formed in the cover of the liquid injection safety helmet, and the liquid injection channel 210 penetrates through the cover of the liquid injection safety helmet. The axial direction of the filling channel 210 may be perpendicular to the wall of the filling port 1312 in the battery 100, so that the filling 300 can vertically penetrate the sealing member 140 located at the filling port 1312, and accurately enter the interior of the battery 100 for exhausting and filling.
In some embodiments, as shown in fig. 8 and 9, when the pouring opening 1312 (not shown in fig. 8 and 9) is formed at the center of the wall where it is located, the sealing member 140 located at the pouring opening 1312 is also disposed at the center of the wall, and then the pouring spout 210 may also be formed correspondingly at the center of the cover of the pouring helmet.
Through the technical scheme of this embodiment, with annotating liquid safety device 200 design as annotating liquid safety helmet, be favorable to this annotate liquid safety helmet comparatively convenient and reliable fixed setting in battery 100, annotate the positional relationship between liquid safety helmet and the battery 100 relatively fixed to make annotate the inside that liquid spare 300 can be comparatively accurate pierces battery 100 through annotating liquid safety helmet, be favorable to further promoting battery 100 at the manufacturing performance of annotating the liquid in-process.
In some alternative embodiments, the injection safety device 200 may be designed into other forms besides an injection safety helmet, such as a plate-like structure, etc., which is not limited in particular by the embodiment of the present application.
Fig. 10 shows a schematic enlarged cross-sectional view of the priming safety device 200 in the embodiment shown in fig. 8 and 9.
As shown in fig. 10, in some embodiments, a first inclined guide groove 220 is formed at an end of the syringe channel 210 remote from the battery 100, and an inclined surface of the first inclined guide groove 220 is disposed obliquely with respect to an axial direction of the syringe channel 210, and the first inclined guide groove 220 is used to guide the syringe 300 into the syringe channel 210.
Specifically, in this embodiment, the end of the injector channel 210 remote from the battery 100 may be the inlet end of the injector channel 210, i.e., the injector 300 enters from the inlet end of the injector channel 210. The first inclined guiding groove 220 is disposed at the inlet end of the liquid injection channel 210, so that the diameter of the liquid injection channel 210 at the inlet end can be enlarged, the liquid injection 300 can conveniently and smoothly enter the liquid injection channel 210, the probability of the liquid injection 300 getting stuck at the inlet end of the liquid injection channel 210 is reduced, and the manufacturing performance of the battery 100 in the liquid injection process is further improved.
Alternatively, by way of example and not limitation, the first inclined guide groove 220 may include a tapered guide groove. The first inclined guiding groove 220 may have a truncated cone structure, and a side surface thereof is a conical surface. The upper bottom of the first inclined guiding groove 220 is a surface far from the battery 100, the lower bottom of the first inclined guiding groove 220 is a surface facing the battery 100, and the upper bottom area of the first inclined guiding groove 220 can be larger than the lower bottom area.
Through the technical scheme of the embodiment, the first inclined plane guide groove 220 is designed as a conical surface guide groove, so that the first inclined plane guide groove 220 has a smooth surface, thereby being convenient for playing a good role in guiding the liquid injection piece 300, further reducing the probability of the liquid injection piece 300 being blocked at the liquid injection piece channel 210, and improving the manufacturing performance of the battery 100 in the liquid injection process.
In some alternative embodiments, the first inclined guiding groove 220 may be designed as a truncated cone structure with a conical surface, but may also be designed as a truncated cone structure with other types of structures, and the embodiment of the present application is not limited thereto.
With continued reference to fig. 10, in the case where the injection safety device 200 is an injection safety cap, a second inclined guiding groove 230 may be disposed at one end of the injection safety cap that is fastened to the battery 100, and an inclined surface of the second inclined guiding groove 230 is inclined with respect to a wall of the battery 100, and the second inclined guiding groove 230 is used for guiding the battery 100 to be fastened to the injection safety cap.
Specifically, in this embodiment, the end of the injection safety cap that is fastened to the battery 100 may be the end of the annular wall of the injection safety cap, and the inner circumferential surface of the annular wall may be provided with the second inclined guiding groove 230. The second inclined guiding groove 230 can enlarge the inner diameter of the injection safety helmet, thereby allowing the battery 100 to have larger displacement margin, even if the battery 100 does not correspond to the full position of the injection safety helmet, but has a certain position offset, the injection safety helmet can be smoothly buckled to the battery 100 through the second inclined guiding groove 230, so as to further improve the production efficiency of the battery 100 in the injection process.
Alternatively, by way of example and not limitation, the second inclined guide groove 230 may also include a tapered guide groove. The second inclined guiding groove 230 may have a truncated cone structure, and a side surface thereof is a conical surface. In addition, the upper bottom of the second inclined guiding groove 230 is a surface facing the pouring channel 210, the lower bottom of the second inclined guiding groove 230 is a surface far away from the pouring channel 210, and the upper bottom area of the second inclined guiding groove 230 can be smaller than the lower bottom area.
Through the technical scheme of this embodiment, design the second inclined plane guide way 230 as the conical surface guide way, can make this second inclined plane guide way 230 have smooth surface to be convenient for play good guide effect to battery 100, make battery 100 can be reliable and stable with annotate the mutual lock of liquid safety helmet, further promote the manufacturing performance of battery 100 in annotating the liquid in-process.
With continued reference to fig. 10, a first receiving groove 240 is further provided in the liquid injection safety device 200, and the first receiving groove 240 is configured to receive the electrode terminal 1311 of the battery 100.
Specifically, the wall of the injection port 1312 in the battery 100 is further provided with an electrode terminal 1311 of the battery 100, and in the case that the injection safety device 200 is correspondingly disposed on the wall of the injection port 1312 in the battery 100, a first accommodating groove 240 is formed on the surface of the injection safety device 200 facing the wall, so that the electrode terminal 1311 of the battery 100 is conveniently accommodated, the injection safety device 200 and the battery 100 can be accurately aligned, and the correspondence between the injection channel 210 in the injection safety device 200 and the sealing member 140 at the injection port 1312 is improved, so as to further improve the manufacturing performance of the battery 100 in the injection process.
Alternatively, the shape of the first receiving groove 240 matches the shape of the electrode terminal 1311.
As an example, in the case where the electrode terminal 1311 is an annular protrusion electrode terminal, the first receiving groove 240 may be an annular receiving groove.
In the case where the first receiving groove 240 and the electrode terminal 1311 are matched with each other, alignment accuracy between the two is high, and tight fitting can be achieved, improving connection stability between the injection safety device 200 and the battery 100. Meanwhile, the gap between the first accommodating groove 240 and the electrode terminal 1311 is smaller, and the first accommodating groove 240 can well protect the electrode terminal 1311, so that interference and influence of the external environment on the electrode terminal 1311 in the liquid injection process are reduced.
In addition to the first receiving groove 240 described above, in the embodiment shown in fig. 10, a second receiving groove 250 is provided in the injection safety device 200, the second receiving groove 250 being operable to receive the sealing member 140.
Specifically, the second receiving groove 250 is provided at the outlet end of the syringe channel 210 so as to receive the sealing member 140 corresponding to the syringe channel 210. The shape of the second accommodating groove 250 can also be matched with the sealing element 140 to design, so that the sealing element 140 can be well protected, and interference and influence of the external environment on the sealing element 140 in the liquid injection process are reduced.
Fig. 11 shows another schematic enlarged cross-sectional view of a priming safety device 200 provided by an embodiment of the present application.
As shown in fig. 11, in some embodiments, an air guide groove 260 is further provided in the liquid injection safety device 200, and the air guide groove 260 communicates with the first surface attached to the battery 100 in the liquid injection safety device 200 and the surface facing the external environment in the liquid injection safety device 200.
Specifically, in the case where the liquid injection safety device 200 is correspondingly disposed on the battery 100, for example, in the case where the liquid injection safety device 200 is a liquid injection safety cap that is fastened to the battery 100, most of the area of the surface of the liquid injection safety device 200 facing the battery 100 may be attached to the wall of the battery 100, so that there is a high degree of fit and stable connection between the liquid injection safety device 200 and the battery 100.
In the case where the first surface of the liquid injection safety device 200 is attached to the battery 100, a gap between the first surface and the battery 100 is small, so that a small pressure or even a negative pressure is easily formed between the first surface and the battery 100, and in the process of separating the liquid injection safety device 200 from the battery 100 after the liquid injection is completed, the small pressure or even the negative pressure between the first surface and the battery 100 can make the liquid injection safety device 200 not easily separate from the battery 100, thereby affecting the production efficiency of the battery 100.
In view of this, in the embodiment of the present application, the gas guide groove 260 is disposed in the injection safety device 200, the gas guide groove 260 is connected to the first surface of the injection safety device 200 attached to the battery 100 and the surface of the injection safety device 200 facing the external environment, and the gas guide groove 260 can guide the atmospheric gas in the external environment into the gap between the first surface of the injection safety device 200 and the battery 100, so as to increase the pressure between the injection safety device 200 and the battery 100, and facilitate the separation of the injection safety device 200 from the battery 100, thereby improving the production efficiency of the battery 100.
In some possible embodiments, the air guide groove 260 communicates with a first surface of the injection safety device 200 attached to the battery 100 and a second surface of the injection safety device 200 opposite to the first surface.
Specifically, in this embodiment, the second surface opposite to the first surface is a surface of the liquid injection safety device 200 facing away from the battery 100, and the second surface is one of surfaces of the liquid injection safety device 200 facing toward the external environment.
In this embodiment, the air guide groove 260 may be a linear air guide channel extending through the injection safety device 200. The radial dimension of the air guide channel may be designed to be smaller, for example, the radial dimension of the air guide channel may be smaller than the radial dimension of the injector channel 210. With the smaller radial dimension of the air guide channel, the possibility that an interfering object in the external environment contacts the battery 100 through the air guide channel can be reduced, thereby reducing the interference and influence of the external environment on the battery 100.
By the technical scheme of the embodiment, the air guide groove 260 is designed to be communicated with the first surface and the second surface which are opposite, so that the air guide groove 260 can be conveniently manufactured in the liquid injection safety device 200, and the overall manufacturing cost of the liquid injection safety device 200 is reduced.
In some alternative embodiments, the air guide groove 260 may be designed as a curved or bent linear air guide channel, and the embodiment of the present application does not limit the shape design of the air guide groove 260.
The air guide groove 260 may be communicated with the first surface of the injection safety device 200 and the surface facing the external environment, and may also be communicated with the first surface and the injection material passage 210. Specifically, after the injector 300 is pulled away from the injector channel 210, the injector channel 210 may also be in communication with the atmosphere, and the air guide 260 may also guide the atmospheric gas to the first surface when the air guide 260 is in communication with the first surface and the injector channel 210.
In some possible embodiments, as shown in fig. 11, the number of the air guide grooves 260 may be plural, and the plurality of air guide grooves 260 may be disposed on two sides of the injection channel 210, so as to further reduce the possibility of forming a lower pressure or even a negative pressure between the injection safety device 200 and the battery 100.
Alternatively, with continued reference to FIG. 11, the length L1 of the injector channel 210 and the length L2 of the target segment in the injector 300 may satisfy: L1.gtoreq.2XL2, wherein the target segment is located at an end of the filler piece 300 facing the interior of the battery 100 and is located outside the filler piece channel 210. Where the filler piece 300 includes a filler needle, the target segment is located at the needle end of the filler needle.
Alternatively, in the case where the inlet end of the syringe channel 210 is provided with the first inclined guide groove 220, the length L1 of the syringe channel 210 may include the depth of the first inclined guide groove 220.
Specifically, in this embodiment, the length of the injector 300 in the injector channel 210 is the length L1 of the injector channel 210, and a portion of the injector 300 in the injector channel 210 may be constrained by the injector channel 210 to control the distortion of the injector 300.
The end of the insert 300 will pass through the insert channel 210 and thus into the interior of the battery 100, and thus a portion of the end of the insert 300 (i.e., the target segment) will be located outside of the insert channel 210, with at least a portion of the target segment being located inside of the battery 100. In the case where the liquid filling port 1312 of the battery 100 is provided with the sealing member 140, at least part of the target segment is located in the sealing member 140.
When the length L1 of the injection member channel 210 is greater, and the length L2 of the injection member 300 at a target segment other than the injection member channel 210 is smaller, for example, when the length L1 is greater than or equal to 2×l2, the injection member channel 210 can perform a better constraint function on the injection member 300, so that the overall distortion of the injection member 300 is reduced, and the injection member 300 can enter the injection port 1312 of the battery 100 at a better angle to reduce interference and influence of the injection member 300 on structural members at the injection port 1312. In addition, in the case where the injection port 1312 of the battery 100 is provided with the sealing member 140, the injection member 300 can penetrate the sealing member 140 at a preferable angle, thereby enabling the injection member 300 to pass through the sealing member 140 effectively and rapidly to enter the inside of the battery 100.
Alternatively, with continued reference to FIG. 11, the diameter D1 of the insert 300 and the diameter D2 of the insert channel 210 satisfy: 0 < (D2-D1)/D1 is less than or equal to 0.15.
Specifically, in this embodiment, the diameter D2 of the syringe channel 210 will be greater than the diameter D1 of the syringe 300, i.e., D2-D1 > 0, to enable the syringe 300 to pass smoothly through the syringe channel 210.
Further, the difference (D2-D1) between the diameter D2 of the injector channel 210 and the diameter D1 of the injector 300 is also (D2-D1)/D1 is less than or equal to 0.15, in which case, the difference between the diameter D2 of the injector channel 210 and the diameter D1 of the injector 300 may be smaller, so that the injector channel 210 has a good constraining effect on the injector 300, and the injector 300 with a larger distortion cannot enter the battery 100 through the injector channel 210. Through the technical scheme of the embodiment, the overall distortion of the liquid injection part 300 can be reduced, so that the liquid injection part 300 can enter the liquid injection port 1312 of the battery 100 at a better angle to reduce the interference and influence of the liquid injection part 300 on the structural parts at the liquid injection port 1312.
In some possible embodiments, the material of the injection safety device 200 may include a high molecular polymer. By way of example, the high molecular polymer includes, but is not limited to, polyetheretherketone (PEEK) and the like.
Specifically, in order to make the battery 100 have better use stability and reliability, the housing of the battery 100 is generally made of a metal material, and in order to reduce abrasion and influence on the battery 100 when the injection safety device 200 contacts with the battery 100, the material of the injection safety device 200 may be a non-metal polymer. The high-molecular polymer can have better wear resistance, higher strength and higher corrosion resistance, so that the high-molecular polymer can be stably and reliably applied to the liquid injection process of the battery 100, plays a role in protecting the battery 100, and has smaller influence on the battery 100.
Fig. 12 shows a schematic flow diagram of another battery priming method 50 provided by an embodiment of the present application. Alternatively, the liquid injection method 50 is equally applicable to the battery 100 shown in the above embodiment.
As shown in fig. 12, the battery priming method 50 may include the following steps.
S501: a sealing member is provided at the liquid inlet of the battery.
S502: the liquid injection member is pierced into the seal member such that the liquid injection member passes through the seal member into the interior of the battery.
S503: electrolyte is injected into the battery through the injection member.
S504: the liquid filling piece is drawn away from the sealing piece.
S505: and detecting the end part of the liquid injection piece.
Specifically, in the embodiment of the present application, the related technical solutions of steps S501 to S504 may be referred to the related descriptions of the above embodiments, and are not repeated here.
In some possible embodiments, step S505 may be performed after step S504, i.e. after the battery is filled with the filling member and the filling member is pulled away from the sealing member, the end of the filling member is detected, so as to enable the filling process of the subsequent battery to be performed reliably and smoothly.
Alternatively, in other possible embodiments, step S505 may also be performed before step S502, i.e. before the sealing member is pierced into the injection member, i.e. the end of the injection member is detected, so as to enable the injection process of the current battery to be performed reliably and smoothly.
Alternatively, step S505 may be performed before step S502 or may be performed again after step S504.
It will be appreciated that in the case where the filling member includes a filling needle, the detection of the end portion of the filling member in step S505 is the detection of the needle head of the filling needle.
According to the technical scheme provided by the embodiment of the application, in the process of injecting the liquid into the battery, the liquid injection piece is used for penetrating the sealing piece of the battery to inject the liquid, the end part of the liquid injection piece is detected, and when the end part of the liquid injection piece is problematic, the liquid injection piece can be replaced in time, so that the liquid injection process of a plurality of batteries in a battery production line can be reliably executed, and the manufacturing performance of the plurality of batteries in the battery production line in the liquid injection process is improved.
Optionally, in some embodiments, the step S505 may include: controlling the liquid injection piece to move along a preset moving path, wherein a first sensor is arranged in the preset moving path; the movement of the end of the syringe is detected by a first sensor to detect whether the end of the syringe is complete. In the case where the pouring member includes a pouring needle, the movement of the needle head of the pouring needle is detected by the first sensor to detect whether the needle head of the pouring member is complete.
For ease of illustration and understanding, fig. 13 shows a schematic structural view of the first sensor 410 and the liquid injector 300 in this embodiment.
As shown in fig. 13, in the embodiment of the present application, a first sensor 410 may be configured for the syringe 300, the first sensor 410 may be disposed in a preset moving path P designed in advance for the end of the syringe 300, and the first sensor 410 may be used to detect the integrity of the end of the syringe 300.
In some implementations, the first sensor 410 may be correspondingly disposed below the injection member 300, and the injection member 300 moves toward the first sensor 410 along a predetermined moving path P in the vertical direction.
Alternatively, the predetermined moving path P may be located in the axial direction of the syringe 300, in other words, the syringe 300 may move along the predetermined moving path P in the axial direction thereof.
Alternatively, in some embodiments, the first sensor 410 can be disposed at an end point of the preset moving path P, and the first sensor 410 can be used to detect whether the end of the syringe 300 is in contact therewith, thereby detecting whether the end of the syringe 300 is complete.
Alternatively, in other embodiments, the first sensor 410 may be disposed downstream of the preset moving path P, and when the injection member 300 moves in the preset moving path P, the first sensor 410 may be driven to move, and the first sensor 410 may be capable of detecting a moving stroke of an end portion of the injection member 300, so as to detect whether the end portion of the injection member 300 is complete.
According to the technical scheme provided by the embodiment of the application, the first sensor 410 is arranged on the liquid injection piece 300, and the first sensor 410 can be used for detecting the end integrity of the liquid injection piece 300, so that the influence on the liquid injection process of the battery 100 when the end of the liquid injection piece 300 is in a missing state is reduced, for example, the possibility that the needle head of the liquid injection needle cannot pierce the sealing piece 140 is reduced, and/or the influence on the battery 100 caused by the fact that the missing liquid injection piece 300 drops metal particles is reduced.
Specifically, the first sensor 410 is disposed at an end point of the preset moving path P, and detects that the end of the injection member 300 is complete in the case that the end of the injection member 300 contacts the first sensor 410; in the case where the end of the syringe 300 does not contact the first sensor 410, the absence of the end of the syringe 300 is detected.
In this embodiment, the length of the preset moving path P can be designed according to the actual requirement, the first sensor 410 can be disposed at the end of the preset moving path P, and the initial position of the injection member 300 can be disposed at the start of the preset moving path P. When the end of the injection molding 300 moves by the length of the preset moving path P and the end of the injection molding 300 is complete, the end of the injection molding 300 can just contact the first sensor 410, so that the first sensor 410 can detect the contact signal of the end of the injection molding 300 to detect the completion of the end of the injection molding 300. In contrast, when there is a missing end of the syringe 300, even if the end of the syringe 300 moves by the length of the preset movement path P, the end of the syringe 300 cannot contact the first sensor 410, and the first sensor 410 cannot detect the contact signal of the end of the syringe 300, thereby detecting that there is a missing end of the syringe 300.
By the technical solution of this embodiment, the first sensor 410 is capable of effectively and reliably detecting the end integrity of the pouring member 300 by detecting the contact of the end of the pouring member 300. On this basis, the structure of the first sensor 410 is easy to realize and has high reliability, which is beneficial to reducing the cost of the end detection device of the liquid injection member 300, thereby reducing the production line cost of the battery 100.
Alternatively, the first sensor 410 may be disposed downstream of the preset moving path P, and detect that the end of the injection member 300 is complete when the moving stroke of the end of the injection member 300 is greater than or equal to the preset threshold value; in the case where the movement stroke of the end of the pouring spout 300 is smaller than the preset threshold value, the absence of the end of the pouring spout 300 is detected.
In this embodiment, the first sensor 410 is not in a fixed state, and is displaceable by the syringe 300. As an example, the first sensor 410 may be disposed on the fixed platform by an elastic member capable of being elastically deformed in the direction of the preset moving path P. When the end of the liquid injection member 300 contacts the first sensor 410, the end of the liquid injection member 300 does not reach the end of the preset moving path P, and the liquid injection member 300 can further move along the preset moving path P, and at this time, the liquid injection member 300 can drive the first sensor 410 to move together in the preset moving path P.
The first sensor 410 may detect a movement stroke of the syringe 300 after contacting the first sensor 410, and when the end of the syringe 300 is a complete end, the movement stroke of the end of the syringe 300 detected by the first sensor 410 is larger, and when the end of the syringe 300 is missing, the movement stroke of the end of the syringe 300 detected by the first sensor 410 is smaller. In the practical application process, the first sensor 410 may determine whether the end of the injection member 300 is complete by determining whether the movement stroke of the end of the injection member 300 is greater than a certain preset threshold. Specifically, the preset threshold may be designed according to the length of the preset moving path P and the specific position of the first sensor 410 in the preset moving path P, and the embodiment of the present application does not specifically limit the preset threshold.
Alternatively, in this embodiment, the first sensor 410 is capable of detecting not only the end integrity of the syringe 300, but also the degree of end missing of the syringe 300 further based on the travel of the end of the syringe 300. For example, in the case where the end of the syringe 300 is complete, the movement stroke of the end of the syringe 300 detected by the first sensor 410 is equal to a preset threshold, and in the case where there is a loss of the end of the syringe 300, the loss length of the end of the syringe 300 is the difference between the preset threshold and the movement stroke actually detected.
By the technical solution of this embodiment, the first sensor 410 is capable of effectively and reliably detecting the end integrity of the pouring member 300 by detecting the movement stroke of the end of the pouring member 300. On this basis, the first sensor 410 can further detect the missing degree of the end of the liquid injection member 300, so that a more comprehensive detection effect is achieved on the liquid injection member 300.
In addition to the above-described detection of the integrity of the injection member 300 by the first sensor 410, other sensors may alternatively be used to detect other characteristics of the injection member 300, such as detecting the skew of the injection member 300.
In some embodiments, step S505 in the example shown in fig. 12 may include: controlling the liquid injection piece to move along a preset moving path, wherein a second sensor is arranged in the preset moving path, and a detection channel for passing through the liquid injection piece is formed in the second sensor; and detecting whether the end part of the liquid injection part is askew or not by using a detection channel in the second sensor. In the case where the syringe includes a needle, a detection channel in the second sensor may be used to detect whether the needle of the syringe is askew.
For ease of illustration and understanding, fig. 14 shows a schematic structural view of the second sensor 420 and the liquid injector 300 in this embodiment.
As shown in fig. 14, in the embodiment of the present application, a second sensor 420 may be configured for the syringe 300, and the second sensor 420 may be disposed in a preset movement path P designed in advance for an end of the syringe 300, and the preset movement path P may be located in an axial direction of the syringe 300.
Specifically, the second sensor 420 has a detection channel 421 formed therein, and a predetermined movement path P may pass through the detection channel 421, and the second sensor 420 may be capable of detecting whether the end of the syringe 300 is askew when the end of the syringe 300 passes through the detection channel 421 in the second sensor 420 along the predetermined movement path P.
In some embodiments, the detection channel 421 in the second sensor 420 may be disposed coaxially with the injection member 300. The predetermined moving path P may be positioned in the same line with the central axis of the detection channel 421 and the syringe 300.
According to the technical scheme provided by the embodiment of the application, the second sensor 420 is arranged on the liquid injection member 300, and the second sensor 420 can be used for detecting whether the end part of the liquid injection member 300 is inclined, so that the influence on the liquid injection process of the battery 100 when the end part of the liquid injection member 300 is inclined is reduced, for example, the possibility that an inclined liquid injection needle cannot pierce the sealing member 140 is reduced, and/or the possibility that the inclined liquid injection member 300 is inclined to pierce other parts of the battery 100 except the liquid injection port 1312 is reduced, and the manufacturing performance of the battery 100 in the liquid injection process and the use reliability of the battery 100 are improved.
Alternatively, in some embodiments, the end skew of the liquid injection member 300 may be detected in a case where the end of the liquid injection member 300 contacts the inner circumferential surface of the detection channel 421 in the second sensor 420; in the case where the end of the syringe 300 does not contact the inner peripheral surface of the detection channel 421, it is possible to detect that the end of the syringe 300 is not skewed.
Specifically, in this embodiment, the second sensor 420 may be a contact sensor. The detection channel 421 of the second sensor 420 is disposed coaxially with the injection member 300. In a specific implementation, the size of the detection channel 421 in the second sensor 420 may be designed according to the requirement of the distortion degree of the liquid injection member 300 in the actual liquid injection process, and when the end portion of the liquid injection member 300 passes through the detection channel 421, the end portion will contact the inner peripheral surface of the detection channel 421 when the end portion of the liquid injection member 300 passes through the detection channel 421, so that the second sensor 420 can detect the contact signal of the end portion, and further determine that the end portion is distorted. On the contrary, when the end portion of the injection member 300 is less inclined or is not inclined, the end portion of the injection member 300 can smoothly pass through the detection channel 421 without contacting the inner circumferential surface of the detection channel 421, and the second sensor 420 cannot detect the contact signal of the end portion, so as to determine that the end portion is not inclined.
Alternatively, the end portion of the injection molding 300 may be skewed with respect to the axial direction of the injection molding 300. For example, where the insert 300 includes a needle, needle tip skew of the needle may be a skew of the needle tip relative to the axial direction of the needle.
By the means of this embodiment, the second sensor 420 can effectively and reliably detect the end skew of the pouring spout 300 by detecting the contact of the end of the pouring spout 300. On this basis, the structure of the second sensor 420 is easy to realize and has high reliability, which is beneficial to reducing the cost of the end detection device of the liquid injection member 300 and thus reducing the production line cost of the battery 100.
Fig. 15 shows a schematic structural diagram of a first sensor 410, a second sensor 420 and a liquid injection member 300 according to an embodiment of the application.
As shown in fig. 15, in the embodiment of the present application, the battery production line may be configured with the first sensor 410 and the second sensor 420 at the same time, and the first sensor 410 and the second sensor 420 are disposed in a preset movement path P designed in advance for the end of the injection member 300. In the preset moving path P, the second sensor 420 is disposed upstream of the first sensor 410, and the injection member 300 can move toward the first sensor 410 through the detecting channel 421 of the second sensor 420.
Specifically, in this embodiment, the second sensor 420 is disposed upstream of the first sensor 410, wherein the detection channel 421 does not affect the movement of the syringe 300 in the preset movement path P while detecting the end skew of the syringe 300, and the syringe 300 can reach the first sensor 410 after passing through the detection channel 421 in the second sensor 420, so that the first sensor 410 detects the end integrity of the syringe 300.
Optionally, a certain gap may be provided between the second sensor 420 and the first sensor 410, so as to reduce the mutual interference that may be caused between the first sensor 410 and the second sensor 420.
Optionally, the second sensor 420 and the first sensor 410 may be fixed by the same fixing device, so that the relative positional relationship between the second sensor 420 and the first sensor 410 is fixed, and the two sensors not only can detect the liquid injection member 300 more accurately, but also can move in the battery production line at the same time, so as to facilitate repeated detection of the liquid injection member 300, and improve the liquid injection efficiency of the battery.
According to the technical scheme provided by the embodiment of the application, the first sensor 410 and the second sensor 420 are simultaneously arranged on the liquid injection piece 300, the first sensor 410 can be used for detecting whether the end part of the liquid injection piece 300 is complete, and the second sensor 420 can be used for detecting whether the end part of the liquid injection piece 300 is inclined, so that the detection comprehensiveness of the liquid injection piece 300 is improved, the influence on the liquid injection process of the battery 100 when the end part of the liquid injection piece 300 is abnormal is reduced to a greater extent, and the manufacturing performance of the battery 100 in the liquid injection process is improved.
Further, the second sensor 420 is disposed upstream of the first sensor 410, and the relative positional relationship therebetween is designed to be compact and reasonable, so that the two sensors do not occupy more equipment space while simultaneously providing integrity and skew detection for the injection member 300.
As an example, as shown in fig. 15, the first sensor 410 may be disposed inside the receiving chamber, and the second sensor 420 may be capped to the receiving chamber. By means of the accommodation chamber, the first sensor 410 and the second sensor 420 can be arranged together in a compact and stable manner, and the second sensor 420 is located upstream of the first sensor 410.
In other alternative examples, the first sensor 410 and the second sensor 420 may also be assembled together by other fixing means such that the relative positional relationship therebetween is fixed. The embodiment of the present application is not particularly limited thereto.
With continued reference to fig. 15, in an embodiment of the present application, the first sensor 410 and the second sensor 420 may also be connected to the processing module 430 through electrical connectors such as signal lines, and the processing module 430 is configured to receive detection signals of the first sensor 410 and the second sensor 420 and/or control the first sensor 410 and the second sensor 420 to perform detection.
In particular, the processing module 430 may be an electrical module having data processing and/or control functions, such as a controller or processor, etc. The first sensor 410 and the second sensor 420 transmit detected detection signals for characterizing the integrity and the skew of the injection molding 300 to the processing module 430, and the processing module 430 may control whether the injection molding 300 continues to perform the subsequent injection process according to the detection signals.
In addition, the processing module 430 may also control whether the first sensor 410 and the second sensor 420 begin to perform detection on the syringe 300. As an example, the processing module 430 may simultaneously control the priming member 300 to start moving along the preset movement path P, and control the first sensor 410 and the second sensor 420 to start detecting, so as to improve the effectiveness of detecting the priming member 300. In this embodiment, the first sensor 410 and the second sensor 420 need not be in an operative state, which is advantageous in reducing power consumption required during the inspection of the syringe 300.
In some implementations of the above embodiments, the preset movement path P of the syringe 300 is the same as the syringe movement path when the syringe 300 is used to fill the battery 100.
Specifically, in the battery production line, the battery 100 and the detection device for performing the liquid injection member detection may be in a moving state, and the battery 100 and the detection device may be moved to a position corresponding to the liquid injection member 300 in a time-sharing manner according to actual requirements, so that the liquid injection member 300 injects the battery 100 or the detection device detects the liquid injection member 300. Wherein the detection means for performing the filling member detection comprises the first sensor 410 and/or the second sensor 420 in the above embodiments.
When the battery 100 is injected by the injection tool 300, the battery 100 may be moved to a target position corresponding to the injection tool 300, and for example, the battery 100 may be moved directly under the injection tool 300. After the injection member 300 moves along the predetermined moving path P, the injection member 300 may pierce the sealing member 140 in the battery 100 to enter the inside of the battery 100, and the injection device may inject the electrolyte into the inside of the battery 100 through the injection member 300.
Before or after the injection member 300 injects the battery 100, the detection device may be moved to a target position that is the same as the position where the battery 100 is located during the injection. The injection molding 300 is again moved along the preset moving path P such that the first sensor 410 in the detecting device performs end integrity detection on the injection molding 300 and such that the second sensor 420 in the detecting device performs end skew detection on the injection molding 300.
According to the technical scheme provided by the embodiment of the application, the liquid injection piece 300 can only have the same moving path, so that the liquid injection of the liquid injection piece 300 to the battery 100 and the detection of the liquid injection piece 300 by the detection device can be completed, and the control mode of the liquid injection piece 300 is simpler and is easy to realize. In addition, the same moving path is adopted in the liquid injection process and the detection process of the liquid injection piece 300, so that the position of a sensor in the detection device can be conveniently adjusted according to the adaptability of different sizes and shapes of the battery 100, and therefore the liquid injection piece 300 can be conveniently and rapidly injected into the battery 100 with various different sizes and shapes, and the detection device can be used for detecting the liquid injection piece 300.
Alternatively, in some implementations of the above application examples, the first sensor 410 is configured to be movable along the extending direction of the preset moving path P.
Specifically, in this embodiment, the distance between the first sensor 410 and the syringe 300 is adjustable when the syringe 300 is in a stationary state (or initial state).
As an example, in case the first sensor 410 is arranged in the receiving chamber, the first sensor 410 is not fixedly arranged in the receiving chamber, and an adjustment module may be provided between an end of the first sensor 410 facing the bottom of the receiving chamber and the bottom of the receiving chamber. By adjusting the height of the adjustment module, the distance between the first sensor 410 and the injection member 300 can be adjusted, and the first sensor 410 can move along the extending direction of the preset moving path P in the sensor accommodating cavity.
By the technical solution of this embodiment, the initial distance between the first sensor 410 and the injection member 300 is adjustable, and the initial distance between the first sensor 410 and the injection member 300 may be designed according to the distance between the injection member 300 and the battery 100. When the model or the external dimensions of the battery 100 change, the injection movement path of the injection member 300 changes synchronously, and the initial distance between the first sensor 410 and the injection member 300 and the preset movement path P in the detection process are also changed synchronously, so that the first sensor 410 can be applied to the detection of the injection member 300 of the battery 100 with various models or external dimensions.
By way of example and not limitation, the first sensor 410 may have a movement distance in the extension direction of the preset movement path P between 0 and 50 mm. The moving distance range can be adapted to the size of most batteries in the related art, so that the first sensor 410 provided in the embodiment of the application can be suitable for the liquid injection part of most batteries in the related art, and is beneficial to popularization and use of the first sensor 410 in a battery production line.
Fig. 16 shows a schematic flow diagram of another battery priming method 60 provided by an embodiment of the present application. Alternatively, the liquid injection method 60 is equally applicable to the battery 100 shown in the above embodiment.
As shown in fig. 16, the battery priming method 60 may include the following steps.
S601: a sealing member is provided at the liquid inlet of the battery.
S602: a liquid injection safety device is arranged on the battery, and a liquid injection part channel corresponding to the sealing part is formed in the liquid injection safety device.
S603: the filler piece is pierced into the filler piece channel such that the filler piece pierces the seal through the filler piece channel to access the interior of the battery.
S604: the internal gas of the battery is discharged through the liquid injection member.
S605: electrolyte is injected into the battery through the injection member.
S606: the liquid filling piece is drawn away from the sealing piece.
S607: and detecting whether the end part of the liquid injection piece is complete or not by using a first sensor.
S608: and detecting whether the end part of the liquid injection piece is askew or not by using a second sensor.
Specifically, in an embodiment of the present application, battery 100 may be provided with a liquid filling port 1312. In step S601, a seal 140 may be provided on the fill port 1312 of the battery 100 using a seal installation device in the battery production line. Alternatively, the sealing member 140 may be a rubber member, and the sealing member 140 may be a rubber nail, as an example.
In step S602, the liquid injection safety device 200 is provided to the battery 100. As an example, the injection safety device 200 may be an injection safety cap, which may be fastened to a wall of the injection port 1312 of the battery 100, so as to achieve stable installation of the injection safety cap on the battery 100.
In addition, a filler channel 210 corresponding to the sealing member 140 of the battery 100 is formed in the filler safety device 200, and in step S603, the filler 300 may penetrate the sealing member 140 through the filler channel 210 in the filler safety device 200 and thus enter the inside of the battery 100.
In this embodiment, the injection safety device 200 can protect the battery 100, and reduce the possibility of the injection member 300 piercing the battery 100, thereby improving the manufacturing performance of the battery 100 during the injection process and the reliability of the battery 100.
Alternatively, the material of the injection safety device 200 may include a high molecular polymer, such as PEEK, and the like. The liquid injection safety device 200 has less abrasion to the metal shell of the battery 100, and can be stably and reliably applied to the liquid injection process of the battery 100.
In step S604, an air extractor may be connected to the injection member 300, for extracting the internal gas of the battery 100 through the injection member 300. Alternatively, after being evacuated by the evacuation device, a negative pressure may be formed inside the battery 100.
In some embodiments, the internal gas of the battery 100 extracted by the gas extraction device may be a gas generated during the closed formation of the battery 100. Specifically, before step S604, the electrolyte injection device may inject a portion of the electrolyte into the interior of the battery 100 through the electrolyte injection member 300, and after the electrolyte injection member 300 is pulled away from the sealing member 140, the battery 100 performs a closed-end formation process. After completion of the closed formation, the injection molding 300 is again inserted into the sealing member 140, and the pumping device may pump the gas generated during the closed formation of the battery 100 through the injection molding 300.
In step S605, the electrolyte injection device may inject the electrolyte into the battery 100 through the electrolyte injection member 300. In the case where the inside of the battery 100 is at a negative pressure, the electrolyte in the electrolyte injection device can be quickly injected into the inside of the battery 100 through the electrolyte injection member 300.
Alternatively, if the battery 100 performs the closed-end formation process, in step S605, the liquid injection device may inject the remaining portion of the electrolyte into the interior of the battery 100 through the liquid injection member 300 to complete the entire liquid injection process of the battery 100.
In step S606, the syringe 300 may be pulled away from the seal 140. The sealing member 140 may be an elastic sealing member, and after the liquid injection member 300 is pulled away, the elastic sealing member may be self-healing, that is, the elastic sealing member may be elastically deformed, so as to reduce a gap formed in the elastic sealing member by the liquid injection member 300, and the size of the gap may be very small or even negligible, so that the electrolyte inside the battery 100 may not leak out of the battery 100 through the gap.
In step S607, the first sensor 410 may be used to detect whether the end of the syringe 300 is complete. Specifically, the injection molding 300 may be controlled to move along a preset moving path P, in which the first sensor 410 is located, for example, at the end or downstream of the preset moving path P, and the first sensor 410 may detect the contact of the injection molding 300 or the moving stroke of the injection molding 300, thereby detecting the integrity of the end of the injection molding 300.
In step S608, whether the end of the syringe 300 is skewed may be detected by the second sensor 420. Specifically, the syringe 300 may be controlled to move along a predetermined moving path P in which the detection channel 421 of the second sensor 420 may be located, and the second sensor 420 may detect whether the end of the syringe 300 is skewed by detecting whether the end of the syringe 300 contacts the inner circumferential surface of the detection channel 421.
Alternatively, the preset moving path P is the same as the injection moving path of the injection member 300 during the injection process. After the battery 100 is filled with the liquid, the battery 100 can be moved first, the detection device including the first sensor 410 and the second sensor 420 is moved to the position of the previous battery 100, and the liquid filling member 300 is controlled to move so that the liquid filling member 300 enters the detection device, and the first sensor 410 and the second sensor 420 detect the integrity and the skew of the liquid filling member 300 respectively.
After the inspection of the filler 300 is performed in step S607 and step S608, the filler 300 may perform the filling of the next battery 100.
Optionally, the detection of the injection member 300 in the above steps S607 and S608 may also be performed before the injection process of the current battery 100, for example, before the step S602 or S601 is performed.
The method for injecting the liquid into the battery provided by the application is described above with reference to fig. 2 to 16, and the system for injecting the liquid into the battery provided by the application is described below with reference to fig. 17. The liquid injection system of the battery can execute the liquid injection method in any embodiment. It can be understood that the related technical solutions of the liquid injection system in the following embodiments may correspond to the related technical solutions of the liquid injection method in the foregoing embodiments, and details of the specific solutions may be referred to the related descriptions of the foregoing embodiments, which are not repeated herein.
As shown in fig. 17, the liquid injection system 1 of the battery may include: seal attachment device 500, injection device 300, and injection device 600. Wherein the seal mounting device 500 is used for taking the seal 140 and disposing the seal 140 at the injection port 1312 of the battery 100, the injection device 300 is used for penetrating the seal 140 to enter the interior of the battery 100, the injection device 600 is connected to the injection device 300, and the injection device 600 is used for injecting electrolyte into the interior of the battery 100 through the injection device 300.
In some possible embodiments, with continued reference to fig. 17, the battery's priming system 1 further comprises: the specific structure of the liquid injection safety device 200 can be seen from the above description of the embodiment shown in fig. 8 to 10.
Specifically, the injection safety device 200 is provided to the battery 100, and an injection passage 210 corresponding to the sealing member 140 is formed in the injection safety device 200, and the injection passage 210 is used to pass through the injection 300, so that the injection 300 penetrates the sealing member 140 through the injection passage 210 to enter the inside of the battery 100.
In some possible embodiments, the injection safety device 200 may include: a liquid injection safety cap which is buckled with the battery 100.
In some possible embodiments, as shown in fig. 17, the liquid injection system 1 of the battery further includes: the liquid filling detection device 400 detects an end of the liquid filling material 300. For example, the priming detection device 400 may be used to detect the needle tip of a priming needle.
In some possible embodiments, the priming member 300 may be configured to move along a predetermined path of movement P, the priming detection device 400 comprising: the first sensor 410 is disposed towards the end of the injection member 300 and located in the preset moving path P, and the first sensor 410 is configured to detect movement of the end of the injection member 300 to detect whether the end of the injection member 300 is complete.
In some possible embodiments, the priming detection device 400 may include: a second sensor 420, a detection channel 421 corresponding to the injection member 300 is formed in the second sensor 420, the detection channel 421 is located in a preset moving path P, and the detection channel 421 is used for detecting whether the end of the injection member is askew or not through the injection member 300.
Alternatively, the specific structure of the first sensor 410 and the second sensor 420 in the priming detection device 400 and related technical solutions can be seen from the above description of the embodiments shown in fig. 13 to 15.
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. 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 (21)
1. A method of filling a battery, comprising:
a sealing element is arranged at a liquid injection port of the battery;
penetrating a liquid injection member into the sealing member such that the liquid injection member passes through the sealing member into the interior of the battery;
injecting electrolyte into the battery through the liquid injection part;
before the electrolyte is injected into the battery through the electrolyte injection member, the electrolyte injection method further comprises:
discharging the internal gas of the battery through the liquid injection member;
The liquid injection method further comprises the following steps:
detecting the end of the liquid injection piece;
wherein, detect the tip of annotating liquid spare includes: controlling the liquid injection piece to move along a preset moving path, wherein a first sensor is arranged in the preset moving path;
detecting movement of the end of the liquid injection member with the first sensor to detect whether the end of the liquid injection member is complete;
the first sensor is arranged at an end point of the preset moving path;
wherein the detecting, with the first sensor, the movement of the end of the liquid injection member to detect whether the end of the liquid injection member is complete, comprises:
detecting that the end of the liquid injection piece is complete under the condition that the end of the liquid injection piece contacts the first sensor;
detecting a lack of an end of the liquid injection member without the end of the liquid injection member contacting the first sensor;
or the first sensor is arranged at the downstream of the preset moving path;
wherein the detecting, with the first sensor, the movement of the end of the liquid injection member to detect whether the end of the liquid injection member is complete, comprises:
detecting that the end part of the liquid injection piece is complete under the condition that the moving stroke of the end part of the liquid injection piece is larger than or equal to a preset threshold value;
And detecting that the end part of the liquid injection piece is missing under the condition that the moving stroke of the end part of the liquid injection piece is smaller than the preset threshold value.
2. The liquid injection method according to claim 1, wherein the discharging the internal gas of the battery through the liquid injection member comprises:
and extracting the internal gas of the battery through the liquid injection piece so as to form negative pressure in the battery.
3. The method of filling liquid according to claim 1, wherein the internal gas of the battery includes a gas generated during the execution of the closed-end formation of the battery.
4. A method of filling a liquid according to any one of claims 1 to 3, wherein the sealing member is an elastic material, and after the electrolyte is filled into the interior of the battery through the liquid filling member, the method further comprises:
and drawing the liquid injection piece away from the sealing piece, wherein after the liquid injection piece is drawn away, the sealing piece deforms elastically so as to reduce a notch formed in the sealing piece by the liquid injection piece.
5. A method of filling a cell according to any one of claims 1 to 3, wherein the penetrating a filling member into the seal such that the filling member passes through the seal into the interior of the cell comprises:
Providing a liquid injection safety device on the battery, wherein a liquid injection part channel corresponding to the sealing part is formed in the liquid injection safety device;
penetrating the filler piece into the filler piece channel such that the filler piece penetrates the seal through the filler piece channel to enter the interior of the battery.
6. The method of filling a liquid according to claim 5, wherein the liquid filling safety device comprises: a liquid injection safety helmet;
wherein, set up notes liquid safety device on the battery, include:
and buckling the liquid injection safety cap with the battery.
7. The method of claim 5, wherein a first inclined guide groove is formed at an end of the injection member channel away from the battery, an inclined surface of the first inclined guide groove being inclined with respect to an axial direction of the injection member channel, the first inclined guide groove being for guiding the injection member into the injection member channel.
8. The method of claim 7, wherein the first beveled guide slot comprises a beveled guide slot.
9. The method of claim 6, wherein a second inclined guiding groove is formed at one end of the injection safety helmet fastened to the battery, and an inclined surface of the second inclined guiding groove is inclined relative to a wall of the battery, and the second inclined guiding groove is used for guiding the battery to be fastened to the injection safety helmet.
10. The method of claim 9, wherein the second beveled guide groove comprises a beveled guide groove.
11. The method of claim 5, wherein the material of the injection safety device comprises a high molecular polymer.
12. The method of filling a liquid according to claim 1, wherein the detecting the end of the liquid filling member comprises:
controlling the liquid injection piece to move along a preset moving path, wherein a second sensor is arranged in the preset moving path, and a detection channel for passing through the liquid injection piece is formed in the second sensor;
and detecting whether the end part of the liquid injection piece is askew or not by using a detection channel in the second sensor.
13. The method of filling a liquid according to claim 12, wherein detecting whether the end of the liquid filling member is skewed by a detection channel in the second sensor comprises:
detecting that an end of the liquid injection member is askew in a case where the end of the liquid injection member contacts an inner peripheral surface of the detection passage;
and detecting that the end of the liquid injection member is not skewed in the case that the end of the liquid injection member does not contact the inner peripheral surface of the detection channel.
14. The method of claim 1, wherein the predetermined movement path is the same as a movement path of the injection member when injecting the battery.
15. A method of filling a liquid according to any one of claims 1 to 3, wherein the material of the seal comprises rubber.
16. A method of filling a liquid according to any one of claims 1 to 3, wherein the thickness of the seal in the central region is less than the thickness of the seal in the edge regions.
17. The method of claim 16, wherein the seal is formed with a first groove in a first surface of the middle region, the first surface being a surface of the seal facing the exterior of the battery; and/or the number of the groups of groups,
the seal is formed with a second groove in a second surface of the middle region, the second surface being a surface of the seal facing the interior of the battery.
18. A battery fluid injection system, comprising:
the sealing element mounting device is used for acquiring a sealing element and arranging the sealing element at a liquid injection port of the battery;
a liquid injection member for penetrating the sealing member to enter the inside of the battery, the liquid injection member for discharging the internal gas of the battery;
The electrolyte injection device is connected with the electrolyte injection piece and is used for injecting electrolyte into the battery through the electrolyte injection piece;
the liquid injection system further comprises: the liquid injection detection device is used for detecting the end part of the liquid injection piece;
the priming member is configured to move along a predetermined path of movement, the priming detection device comprising: the first sensor is arranged towards the end part of the liquid injection piece and is positioned in the preset moving path, and the first sensor is used for detecting the movement of the end part of the liquid injection piece so as to detect whether the end part of the liquid injection piece is complete or not;
detecting that the end part of the liquid injection piece is complete under the condition that the end part of the liquid injection piece contacts the first sensor;
detecting a lack of an end of the liquid injection member without the end of the liquid injection member contacting the first sensor;
or detecting that the end part of the liquid injection piece is complete under the condition that the moving stroke of the end part of the liquid injection piece is larger than or equal to a preset threshold value;
and detecting that the end part of the liquid injection piece is missing under the condition that the moving stroke of the end part of the liquid injection piece is smaller than the preset threshold value.
19. The fluid injection system of claim 18, wherein the fluid injection system further comprises: the liquid injection safety device is arranged on the battery;
the liquid injection safety device is provided with a liquid injection piece channel corresponding to the sealing piece, wherein the liquid injection piece channel is used for passing through the liquid injection piece, so that the liquid injection piece penetrates into the sealing piece through the liquid injection piece channel to enter the battery.
20. The priming system of claim 19, wherein the priming safety device comprises: the liquid injection safety helmet is buckled with the battery.
21. The priming system of claim 18, wherein the priming member is configured to move along a predetermined path of movement, the priming detection device comprising: the second sensor is provided with a detection channel corresponding to the liquid injection piece, the detection channel is positioned in the preset moving path, and the detection channel is used for detecting whether the end part of the liquid injection piece is askew or not through the liquid injection piece.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311515259.5A CN117317542A (en) | 2023-07-17 | 2023-07-17 | Liquid injection method and liquid injection system for battery |
| CN202310873335.3A CN116613485B (en) | 2023-07-17 | 2023-07-17 | Liquid injection method and liquid injection system for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310873335.3A CN116613485B (en) | 2023-07-17 | 2023-07-17 | Liquid injection method and liquid injection system for battery |
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| CN202311515259.5A Division CN117317542A (en) | 2023-07-17 | 2023-07-17 | Liquid injection method and liquid injection system for battery |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN117317542A (en) | 2023-12-29 |
| CN116613485A (en) | 2023-08-18 |
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