WO2025015698A1 - 电池的注液方法和注液系统 - Google Patents

电池的注液方法和注液系统 Download PDF

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Publication number
WO2025015698A1
WO2025015698A1 PCT/CN2023/119953 CN2023119953W WO2025015698A1 WO 2025015698 A1 WO2025015698 A1 WO 2025015698A1 CN 2023119953 W CN2023119953 W CN 2023119953W WO 2025015698 A1 WO2025015698 A1 WO 2025015698A1
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WIPO (PCT)
Prior art keywords
battery
liquid injection
injection
piece
liquid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/119953
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English (en)
French (fr)
Inventor
吴凯
孙陈铭
冯亚兰
唐鸣浩
黄彩虾
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Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Publication of WO2025015698A1 publication Critical patent/WO2025015698A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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

Definitions

  • Embodiments of the present application relate to the field of batteries, and more specifically, to a battery injection method and injection system.
  • the electrolyte is a component of the battery, and the injection process of the electrolyte into the battery shell is also crucial to the overall performance of the battery. In view of this, how to improve the manufacturing performance of the battery during the injection process is a technical problem that needs to be solved urgently.
  • the embodiments of the present application provide a battery injection method and injection system, which can improve the manufacturing performance of the battery during the injection process.
  • a battery injection method comprising: providing a sealing member at a battery injection port; inserting an injection member into the sealing member so that the injection member passes through the sealing member and enters the interior of the battery; injecting electrolyte into the interior of the battery through the injection member, and injecting electrolyte into the interior of the battery through the injection member.
  • the liquid injection method further includes: discharging internal gas of the battery through the liquid injection member.
  • the injection port of the battery is provided with a seal, and the seal is pierced by the injection piece to enter the interior of the battery, so that the injection piece can be injected into the interior of the battery, so as to reduce the electrolyte contamination problem caused by electrolyte leakage during the injection process, and improve the manufacturing performance of the battery during the injection process and the reliability of the battery.
  • the gas inside the battery can be first discharged by the injection piece, and then the electrolyte is injected into the interior of the battery through the injection piece. The discharged internal gas will not occupy the storage space inside the battery, which is conducive to improving the energy density and product performance of the battery.
  • discharging the internal gas of the battery through the liquid injection piece includes: extracting the internal gas of the battery through the liquid injection piece to form a negative pressure inside the battery.
  • the technical solution of this embodiment uses the exhaust device to extract the internal gas of the battery, which can increase the discharge rate of the internal gas of the battery, thereby improving the manufacturing and processing efficiency of the battery.
  • the electrolyte in a normal pressure environment can be quickly injected into the interior of the battery through the injection piece, which is not only conducive to increasing the injection rate to improve the manufacturing and processing efficiency of the battery, but also reduces the possibility of problems such as electrolyte leakage or splashing during the injection process, thereby further improving the manufacturing performance of the battery during the injection process.
  • the internal gas of the battery includes gas generated during the closed-end formation process of the battery.
  • the reaction gas generated by the battery during the closed-end formation process can be first extracted through the injection piece, and then the electrolyte can be injected into the battery through the injection piece.
  • the capacity of the electrolyte injected into the battery can be increased to improve the overall performance of the battery.
  • the gas in the battery can be reduced to reduce the internal air pressure of the battery and reduce the possibility of battery explosion.
  • the sealing member is made of elastic material, and after the electrolyte is injected into the interior of the battery through the injection member, the injection method further includes: pulling the injection member away from the sealing member, wherein after the injection member is pulled away, the sealing member elastically deforms to reduce the gap formed by the injection member in the sealing member.
  • the elastic deformation of the sealing piece can make the gap in the sealing piece very small or even negligible.
  • the small gap will not affect the sealing of the battery. Therefore, in addition to improving the manufacturing performance of the battery during the injection process, the seal can also be reused as a seal to seal the injection port of the battery during normal use.
  • the technical solution of this embodiment is conducive to comprehensively improving the manufacturing performance and use performance of the battery during the injection process.
  • the above-mentioned piercing of the injection piece into the seal so that the injection piece passes through the seal and enters the interior of the battery includes: providing an injection safety device on the battery, in which an injection piece channel corresponding to the seal is formed; and piercing the injection piece into the injection piece channel so that the injection piece penetrates the seal through the injection piece channel to enter the interior of the battery.
  • the battery is equipped with a liquid injection safety device, which can protect the battery, and the liquid injection piece can more accurately penetrate the sealing piece through the liquid injection piece channel in the liquid injection safety device, thereby reducing the possibility of the liquid injection piece piercing off and affecting the battery, thereby improving the manufacturing performance of the battery during the liquid injection process and the reliability of the battery.
  • the liquid injection safety device includes: a liquid injection safety cap; wherein the above-mentioned provision of the liquid injection safety device on the battery includes: buckling the liquid injection safety cap onto the battery.
  • the liquid injection safety device is designed as a liquid injection safety cap, which is conducive to the liquid injection safety cap being fixed to the battery more conveniently and reliably.
  • the positional relationship between the liquid injection safety cap and the battery is relatively fixed, so that the liquid injection piece can penetrate into the interior of the battery more accurately through the liquid injection safety cap, which is conducive to further improving the manufacturing performance of the battery during the liquid injection process.
  • a first inclined guide groove is formed at one end of the injection piece channel away from the battery, the inclined surface of the first inclined guide groove is inclined relative to the axial direction of the injection piece channel, and the first inclined guide groove is used to guide the injection piece into the injection piece channel.
  • the diameter of the injection piece channel at the inlet end (that is, the end of the injection piece channel away from the battery) can be enlarged, which is conducive to the injection piece entering the injection piece channel more conveniently and smoothly, and reduces the probability of the injection piece getting stuck at the inlet end of the injection piece channel, thereby further improving the manufacturing performance of the battery during the injection process.
  • the first inclined surface guide groove includes a conical surface guide groove.
  • the first inclined surface guide groove is designed as a conical surface guide groove, so that the first inclined surface guide groove has a smooth surface, thereby facilitating a good guiding effect on the injection piece, further reducing the probability of the injection piece getting stuck in the injection piece channel, and improving the Manufacturing performance of liter batteries during the filling process.
  • a second bevel guide groove is provided at one end of the liquid filling safety cap that is buckled onto the battery, the bevel of the second bevel guide groove is inclined relative to the wall of the battery, and the second bevel guide groove is used to guide the battery to buckle onto the liquid filling safety cap.
  • the second inclined guide groove can expand the inner diameter of the liquid filling safety cap, thereby allowing the battery to have a larger displacement margin. Even if the battery has a certain position offset compared to the liquid filling safety cap, the liquid filling safety cap can be smoothly buckled on the battery through the second inclined guide groove, thereby further improving the battery production efficiency during the liquid filling process.
  • the second inclined surface guide groove includes a conical surface guide groove.
  • the second inclined guide groove is designed as a conical guide groove, so that the second inclined guide groove can have a smooth surface, thereby facilitating a good guiding effect on the battery, so that the battery can be stably and reliably engaged with the liquid filling safety cap, further improving the manufacturing performance of the battery during the liquid filling process.
  • the material of the liquid injection safety device includes a high molecular polymer.
  • the liquid injection safety device made of high molecular polymer can have better wear resistance, higher strength and higher corrosion resistance, so that it can be stably and reliably used in the liquid injection process of the battery. While playing a role in protecting the battery safety, it causes less wear and impact on the battery.
  • the liquid injection method further includes: detecting an end of the liquid injection member.
  • the liquid injection method further includes: checking the needle tip of the liquid injection member.
  • the injection piece during the process of injecting liquid into the battery, not only the injection piece is used to pierce the seal of the battery to inject liquid, but also the end of the injection piece, such as the needle of the injection needle, is detected.
  • the injection piece can be replaced in time, so that the injection process of multiple batteries in the battery production line can be reliably executed, which is conducive to further improving the manufacturing performance of multiple batteries in the battery production line during the injection process.
  • the above-mentioned detection of the end of the injection piece includes: controlling the injection piece to move along a preset moving path, in which a first sensor is provided; and using the first sensor to detect the movement of the end of the injection piece to detect whether the end of the injection piece is intact.
  • a first sensor is provided for the injection piece, and the first sensor can be used to detect the integrity of the end of the injection piece, thereby reducing the impact on the injection process of the battery when the end of the injection piece is missing, for example, reducing the possibility that the needle tip of the injection needle is unable to pierce the seal, and/or reducing the impact of metal particles dropped by the missing injection piece on the battery.
  • the first sensor is disposed at an end point of a preset moving path; wherein, the above-mentioned use of the first sensor to detect the movement of the end of the injection piece to detect whether the end of the injection piece is intact includes: when the end of the injection piece contacts the first sensor, detecting that the end of the injection piece is intact; when the end of the injection piece does not contact the first sensor, detecting that the end of the injection piece is missing.
  • the first sensor can effectively and reliably detect the integrity of the end of the injection piece by detecting the contact of the end of the injection piece.
  • the structure of the first sensor is easy to implement and has high reliability, which is conducive to reducing the cost of the end detection device of the injection piece and thus reducing the production line cost of the battery.
  • the first sensor is disposed downstream of a preset moving path; wherein, the above-mentioned use of the first sensor to detect the movement of the end of the injection piece to detect whether the end is intact includes: when the moving stroke of the end of the injection piece is greater than or equal to a preset threshold value, detecting that the end of the injection piece is intact; when the moving stroke of the end of the injection piece is less than the preset threshold value, detecting that the end of the injection piece is missing.
  • the first sensor can effectively and reliably detect the integrity of the end of the injection piece by detecting the movement of the end of the injection piece. On this basis, the first sensor can also facilitate further detection of the degree of end loss of the injection piece, thereby playing a more comprehensive detection role for the injection piece.
  • the above-mentioned detection of the end of the injection piece includes: controlling the injection piece to move along a preset moving path, a second sensor is provided in the preset moving path, and a detection channel for passing the injection piece is formed in the second sensor; using the detection channel in the second sensor to detect whether the end of the injection piece is skewed.
  • a second sensor is provided for the injection piece, and the second sensor can be used to detect whether the end of the injection piece is skewed, thereby reducing the occurrence of skewness at the end of the injection piece.
  • the effect of tilting on the filling process of the battery for example, reducing the possibility that a tilted filling needle cannot pierce the seal.
  • the above-mentioned detection of whether the end of the injection piece is skewed by using the detection channel in the second sensor includes: when the end of the injection piece contacts the inner circumference of the detection channel, detecting that the end of the injection piece is skewed; when the end of the injection piece does not contact the inner circumference of the detection channel, detecting that the end of the injection piece is not skewed.
  • the second sensor can effectively and reliably detect the skewness of the end of the injection piece by detecting the contact of the end of the injection piece.
  • the structure of the second sensor is easy to implement and has high reliability, which is conducive to reducing the cost of the end detection device of the injection piece and thus reducing the production line cost of the battery.
  • the preset moving path is the same as the injection moving path of the injection member when injecting liquid into the battery.
  • the liquid injection piece can have only the same moving path, which can complete the liquid injection of the liquid injection piece into the battery and the detection device (including the first sensor and/or the second sensor) to detect the liquid injection piece, and the control method of the liquid injection piece is relatively simple and easy to implement.
  • the liquid injection process and the liquid injection piece detection process use the same moving path, which can facilitate the adjustment of the position of the sensor in the detection device according to the different sizes and shapes of the battery, so as to conveniently realize that the liquid injection piece can not only inject liquid into batteries of various sizes and shapes, but also use the detection device to detect the liquid injection piece.
  • the material of the sealing element includes rubber.
  • the seal can have better sealing performance, better elasticity and a certain hardness. While the seal has a good sealing effect on the liquid injection port of the battery, it can also resist certain external forces and achieve self-healing after the liquid injection piece is removed. The seal can have better application performance in the battery manufacturing process.
  • the thickness of the seal in the middle region is smaller than the thickness of the seal in the edge region.
  • a weak portion with a smaller thickness is designed in the middle area of the seal, which allows the injection piece to pierce the weak portion of the seal more quickly and reliably to enter the interior of the battery, thereby further improving the battery's injection efficiency.
  • the seal has a first groove formed on a first surface in the middle region, and the first surface is the surface of the seal facing the outside of the battery; and/or, the seal has a second groove formed on a second surface in the middle region, and the second surface is the surface of the seal facing the inside of the battery.
  • a weak portion with a smaller thickness can be provided in the seal by providing a groove on at least one surface of the seal, and the technical solution is easy to implement and has a high controllability.
  • a first groove is provided on the first surface of the seal facing the outside of the battery, and the first groove can play a positioning effect on the injection piece, and the injection piece can more accurately pierce the weak area in the middle of the seal through the first groove.
  • a battery injection system comprising: a seal installation device, used to obtain a seal and set the seal at the injection port of the battery; an injection piece, used to pierce the seal to enter the interior of the battery; and an injection device, connected to the injection piece, the injection device being used to inject electrolyte into the interior of the battery through the injection piece.
  • the injection system further includes: an injection safety device, which is arranged on the battery; an injection channel corresponding to the sealing member is formed in the injection safety device, and the injection channel is used for passing the injection member so that the injection member penetrates the sealing member through the injection channel to enter the interior of the battery.
  • the liquid filling safety device includes: a liquid filling safety cap, which is buckled onto the battery.
  • the liquid injection system further includes: a liquid injection detection device, which is used to detect the end of the liquid injection piece.
  • the injection piece is configured to move along a preset moving path
  • the injection detection device includes: a first sensor, which is arranged toward the end of the injection piece and located in the preset moving path, and the first sensor is used to detect the movement of the end of the injection piece to detect whether the end is intact.
  • the injection piece is configured to move along a preset moving path
  • the injection detection device includes: a second sensor, in which a detection channel corresponding to the injection piece is formed, the detection channel is located in the preset moving path, and the detection channel is used to pass through the injection piece to detect whether the end of the injection piece is skewed.
  • a sealing member is provided at the liquid injection port of the battery.
  • the injection piece is used to pierce the sealing piece to enter the interior of the battery, so that the injection piece can inject liquid into the interior of the battery, thereby reducing the electrolyte contamination problem caused by electrolyte leakage during the injection process, improving the manufacturing performance of the battery during the injection process and the reliability of the battery.
  • FIG1 is a schematic diagram of the structure of a battery provided in one embodiment of the present application.
  • FIG2 is a schematic flowchart of a battery injection method provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a structure corresponding to step S201 shown in FIG2 ;
  • FIG4 is a schematic diagram of a structure corresponding to step S202 shown in FIG2 ;
  • FIG5 is a partial enlarged view of part A in the embodiment shown in FIG4 ;
  • FIG6 is a schematic flowchart of another battery injection method provided in an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another battery injection method provided in one embodiment of the present application.
  • FIG8 is a schematic diagram of a structure corresponding to steps S402 and S403 shown in FIG7;
  • Fig. 9 is a schematic cross-sectional view of the battery shown in Fig. 8 along the B-B' direction;
  • FIG10 is a schematic enlarged cross-sectional view of the liquid injection safety device in the embodiment shown in FIG8 and FIG9;
  • FIG11 is another schematic enlarged cross-sectional view of a liquid injection safety device provided in one embodiment of the present application.
  • FIG12 is a schematic flowchart of another battery injection method provided in one embodiment of the present application.
  • FIG13 is a schematic structural diagram of a first sensor and a liquid injection member provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of the structure of a second sensor and a liquid injection member provided in an embodiment of the present application.
  • FIG15 is a schematic structural diagram of a first sensor, a second sensor and a liquid injection member provided in an embodiment of the present application;
  • FIG16 is a schematic flowchart of another battery injection method provided in one embodiment of the present application.
  • FIG. 17 is a schematic structural block diagram of a battery injection system provided in an embodiment of the present application.
  • a and/or B can represent: A exists, A and B exist at the same time, and B exists.
  • the character "/" in this application generally indicates that the associated objects before and after are in an "or" relationship.
  • batteries are the main power source for electrical devices such as electric vehicles, ships or spacecraft, and their importance is self-evident.
  • batteries may include lithium
  • the present invention relates to a battery cell or a battery pack.
  • the battery cell may be a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery or a magnesium-ion battery, etc., which is not limited in the embodiments of the present application.
  • the battery may also be referred to as a battery cell or a battery core.
  • one or more batteries may form a battery module or a battery pack to provide a higher voltage and capacity to an electrical device.
  • the battery pack may include a casing for encapsulating one or more batteries. The casing can reduce the effect of liquids or other foreign matter on the charging or discharging of the battery.
  • the battery can be cylindrical, flat, rectangular or other shapes, etc., and the present application embodiment does not limit this.
  • batteries are generally divided into three types according to the packaging method: cylindrical batteries, square batteries and soft-pack batteries, and the present application embodiment does not limit this.
  • the development of battery technology must take into account many design factors at the same time. For example, in order to improve the charging and discharging performance of the battery, it is necessary to consider various performance parameters such as the battery's energy density, cycle life, discharge capacity, and charge and discharge rate. In addition, the manufacturing efficiency and manufacturing performance of the battery are also crucial to the promotion, application, and long-term development of the battery.
  • a battery generally includes a housing, an electrode assembly, and an electrolyte.
  • the housing can be used to contain the electrode assembly and the electrolyte.
  • the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • 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.
  • the electrolyte may include lithium salts and organic solvents.
  • the battery injection process i.e., the process of injecting electrolyte into the battery shell
  • the production and manufacturing performance of the injection process will affect the final product performance of the battery.
  • an injection tool such as an injection nozzle, etc.
  • the battery injection port is injected through the injection tool. If the injection tool is not in good contact with the edge of the injection port, there may be a risk of leakage during the injection process, resulting in electrolyte contamination problems, affecting the subsequent battery manufacturing and battery product performance.
  • the embodiment of the present application provides a new battery injection method, comprising: setting a sealing member at the injection port of the battery, piercing the injection member into the sealing member so that the injection member passes through the sealing member into the interior of the battery, and injecting electrolyte into the interior of the battery through the injection member.
  • the sealing member is used to enter the interior of the battery, so that the injection member can inject liquid into the interior of the battery, thereby reducing the electrolyte contamination problem caused by electrolyte leakage during the injection process, and improving the battery's injection production performance and the battery's reliability.
  • the technical solutions described in the embodiments of the present application are applicable to various devices using batteries, such as electric vehicles, battery vehicles, electric tools, ships and spacecraft, etc., wherein the spacecraft includes airplanes, rockets, space shuttles and spacecraft, etc. 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 can also be applied to all devices using batteries.
  • FIG1 shows a schematic structural diagram of a battery 100 provided in an embodiment of the present application.
  • the battery 100 includes a housing 110, an electrode assembly 120, and an end cap assembly 130.
  • the housing 110 and the end cap assembly 130 form a housing or a battery box.
  • the housing 110 may be formed of a metal (e.g., aluminum).
  • the housing 110 may be shaped according to the combination of one or more electrode assemblies 120.
  • the housing 110 may be a hollow cylinder as shown in FIG1 .
  • the housing 110 has an opening, the electrode assembly 120 is accommodated in the housing 110, and the end cap assembly 130 is used to cover the opening to accommodate the electrode assembly 120 in the housing 110.
  • the housing 110 and the end cap assembly 130 are used to accommodate and protect the electrode assembly 120 and other components.
  • the housing 110 is filled with an electrolyte, i.e., an electrolyte.
  • the electrode assembly 120 may be provided as a single one or as a plurality of ones according to actual use requirements.
  • one electrode assembly 120 is provided in the battery 100 .
  • the end cap assembly 130 includes a negative end cap 1301 and a positive end cap 1302, which cover the opening of the housing 110 from both ends of the housing 110, respectively, so as to cover the electrode assembly 120 in the housing 110.
  • a negative electrode terminal is provided on the negative end cap 1301, and a positive electrode terminal is provided on the positive end cap 1302.
  • a pole ear 121 is provided on the electrode assembly 120, wherein the positive electrode terminal is electrically connected to the positive pole ear of the electrode assembly 120, and the negative electrode terminal is electrically connected to the negative pole ear of the electrode assembly 120.
  • the negative terminal cover 1301 or the positive terminal cover 1302 is also provided with a liquid injection port 1312.
  • the central portion of the negative terminal cover 1301 may be provided with a liquid injection port 1312.
  • an external liquid injection tool may be provided. The electrolyte is injected into the battery 100 at the injection port 1312 .
  • the end cover assembly 130 may also be provided with other battery components, such as a pressure relief mechanism, etc.
  • the embodiment of the present application does not limit the specific composition structure of the battery 100.
  • the battery 100 shown in FIG. 1 is illustrated using a cylindrical battery as an example.
  • the battery provided in the present application may also be a square battery or a battery of other shapes.
  • the square battery its components may be similar to the battery 100 shown in FIG. 1 above, and the shell of the square battery may be a hollow square shell.
  • Fig. 2 shows a schematic flow chart of a battery injection method 20 provided in an embodiment of the present application.
  • the injection method 20 may be applicable to the battery 100 shown in Fig. 1 .
  • the battery injection method 20 may include the following steps.
  • the injection method 20 provided in the embodiment of the present application can be performed by an injection device in a battery production line, and the injection device may include one or more related devices or components to respectively complete multiple steps in the injection method 20.
  • FIG3 shows a structural schematic diagram corresponding to step S201 shown in FIG2 .
  • step S201 a seal 140 is provided at the liquid injection port 1312 (not shown in FIG3 ) of the battery 100.
  • step S201 can be performed by a seal installation device in a battery production line.
  • the seal installation device can obtain the seal 140 and install it at the liquid injection port 1312 of the battery 100.
  • the seal 140 is a structural member with a sealing effect, and its outer dimensions can be adapted to the liquid injection port 1312 of the battery 100, thereby providing a good sealing effect on the liquid injection port 1312 of the battery 100.
  • the seal 140 can have a certain hardness to improve the performance of the seal 140 and reduce the impact of external stress on the seal 140.
  • the material of the seal 140 may include rubber.
  • the sealing member 140 may also be made of other materials having a sealing effect and a certain hardness.
  • the seal 140 may be a plastic nail.
  • the shape of the seal 140 may be similar to a nail, and it has a nail cap and a nail body.
  • the plastic nail can be easily and stably installed at the injection port 1312 of the battery 100 to provide a good sealing effect on the battery 100.
  • Fig. 4 shows a schematic diagram of a structure corresponding to step S202 shown in Fig. 2.
  • Fig. 4 may be a schematic diagram of a cross section of the battery 100 shown in Fig. 3 along the A-A' direction.
  • the liquid injection member 300 may penetrate into and pass through the sealing member 140 , thereby entering the interior of the battery 100 through the liquid injection port 1312 where the sealing member 140 is located.
  • the injection member 300 may be in the form of a liquid injection needle, a liquid injection tube, etc.
  • the liquid injection member channel 210 may be in the form of a liquid injection needle channel or a liquid injection tube channel, etc.
  • the injection piece 300 can move vertically, and the tip of the injection piece 300 can vertically penetrate the seal 140 located at the top of the battery 100, and then enter the interior of the battery 100.
  • a channel can be formed inside the battery 100 to facilitate the entry of the injection piece 300, and the injection piece 300 will not damage the electrode assembly inside the battery 100.
  • the battery production line may be equipped with a liquid injection device, which can inject electrolyte into the interior of the battery 100 through the liquid injection piece 300.
  • the liquid injection device can be understood as an electrolyte providing device, which is connected to the liquid injection piece 300, and a liquid injection channel is formed in the liquid injection piece 300.
  • the electrolyte in the liquid injection device flows into the interior of the battery 100 through the liquid injection channel in the liquid injection piece 300.
  • a switch may be provided at the connection between the liquid injection device and the liquid injection piece 300. When the switch is controlled to be turned on, the liquid injection device and the liquid injection channel in the liquid injection piece 300 are connected to each other, and when the switch is controlled to be turned off, the liquid injection device and the liquid injection channel in the liquid injection piece 300 are disconnected from each other.
  • the injection port 1312 of the battery 100 is provided with a seal 140, and the injection piece 300 is used to pierce the seal 140 to enter the interior of the battery 100, so that the injection piece 300 can inject liquid into the interior of the battery 100, so as to reduce the electrolyte contamination problem caused by electrolyte leakage during the injection process, and improve the manufacturing performance of the battery 100 during the injection process and the reliability of the battery 100.
  • FIG. 5 is a partial enlarged view of portion A in the embodiment shown in FIG. 4 .
  • the thickness of the seal 140 in the middle region may be smaller than the thickness of the seal 140 in the edge region.
  • the sealing member 140 is not a structural member with uniform thickness, and has a weak portion with a smaller thickness, which is easily pierced by the external liquid injection member 300, so that the liquid injection member 300 can quickly enter the interior of the battery 100.
  • the weak portion may be located in the middle area of the sealing member 140, specifically, the weak portion may be located in the middle area of the sealing member 140 in the first direction, and the first direction is the radial direction of the liquid injection port 1312.
  • the thickness of the nail body of the sealing member 140 in the middle region may be smaller than the thickness of the nail body in the edge region.
  • a weak portion with a smaller thickness is designed in the middle area of the seal 140, so that the injection part 300 can pierce the weak portion of the seal 140 more quickly and reliably to enter the interior of the battery 100, thereby further improving the injection efficiency of the battery 100.
  • the seal 140 has a first groove 141 formed on a first surface in the middle region, and the first surface is the surface of the seal 140 facing the outside of the battery 100; and/or, the seal 140 has a second groove 142 formed on a second surface in the middle region, and the second surface is the surface of the seal 140 facing the inside of the battery 100.
  • first groove 141 and the second groove 142 may be arc-shaped grooves to reduce the probability of the injection piece 300 getting stuck at the grooves.
  • a weak portion with a smaller thickness can be provided in the seal 140 by providing a groove on at least one surface of the seal 140.
  • This technical solution is easy to implement and has a high controllability.
  • a first groove 141 is provided on the first surface of the seal 140 facing the outside of the battery 100. The first groove 141 can play a positioning effect on the injection piece 300, and the injection piece 300 can more accurately pierce the weak area in the middle of the seal 140 through the first groove 141.
  • Fig. 6 shows a schematic flow chart of another battery injection method 30 provided in an embodiment of the present application.
  • the injection method 30 can also be applied to the battery 100 shown in the above embodiment.
  • the battery injection method 30 may include the following steps.
  • steps S301, S302 and S304 can refer to the relevant description of the embodiment shown in FIG. 2 above, and will not be described in detail here.
  • step S303 before the injection device injects electrolyte into the battery 100 through the injection piece 300, the internal gas of the battery 100 can also be discharged to the outside of the battery 100 through the injection piece 300.
  • a channel can be formed in the injection piece 300, and the channel can be both an exhaust channel and an injection channel.
  • the internal gas of the battery 100 can be exhausted through the channel first, and then the electrolyte enters the battery 100 through the channel.
  • the internal gas of the battery 100 may be the gas generated during the previous processing of the battery 100.
  • the gas will occupy the internal space of the battery 100 and affect the effective storage space in the battery 100, such as affecting the space in the battery 100 for storing electrolyte, thereby affecting the energy density and product performance of the battery 100, etc.
  • the injection piece 300 can be used to discharge the gas inside the battery 100 first, and then the electrolyte is injected into the interior of the battery 100 through the injection piece 300.
  • the discharged internal gas will not occupy the storage space inside the battery 100, which is beneficial to improving the energy density and product performance of the battery 100.
  • the above step S303 may include: extracting internal gas of the battery through a liquid injection piece to form a negative pressure inside the battery.
  • a gas extraction device may be further configured in the battery production line, and the gas extraction device may be connected to the liquid injection piece 300, and extract the internal gas of the battery 100 through the liquid injection piece 300.
  • the internal gas of the battery 100 is extracted by the gas extraction device, which can increase the discharge rate of the internal gas of the battery 100, thereby improving the manufacturing and processing efficiency of the battery 100.
  • negative pressure can be formed inside the battery 100 by extracting the internal gas of the battery 100, that is, the internal gas pressure of the battery 100 is lower than the atmospheric pressure (also called normal pressure).
  • the electrolyte in the normal pressure environment can be quickly injected through the injection part 300. Introducing the electrolyte into the interior of the battery 100 is not only beneficial for increasing the injection rate to improve the manufacturing efficiency of the battery 100, but also can reduce the possibility of problems such as electrolyte leakage or splashing during the injection process, thereby further improving the manufacturing performance of the battery 100 during the injection process.
  • the internal gas of the battery 100 may include: gas generated during the closed-end formation process of the battery 100 .
  • the interior of the battery 100 is in a sealed state.
  • the battery 100 can enter the formation station and perform a closed-mouth formation process at the formation station.
  • the battery 100 can be charged and discharged to activate the active material inside the battery 100, so that the battery 100 is activated to facilitate the subsequent normal charge and discharge operation of the battery 100.
  • the chemical reaction occurring inside the battery 100 will produce certain reaction gases, which will greatly affect the internal storage space of the battery 100 and also cause a high internal gas pressure of the battery 100, thereby increasing the possibility of explosion of the battery 100.
  • the reaction gas generated by the battery 100 during the closed-end formation process can be first extracted through the injection piece 300, and then the electrolyte can be injected into the battery 100 through the injection piece 300.
  • the capacity of the electrolyte injected into the battery 100 can be increased to improve the overall performance of the battery 100.
  • the gas in the battery 100 can be reduced to reduce the internal air pressure of the battery 100, thereby reducing the possibility of explosion of the battery 100.
  • part of the electrolyte may be injected into the interior of the battery 100 in advance. After the battery 100 completes the closed-end formation and the internal gas of the battery 100 is extracted, the remaining electrolyte may be injected into the interior of the battery 100.
  • the injection device may first inject a portion of electrolyte into the interior of the battery 100 through the injection piece 300, then the injection piece 300 withdraws from the sealing piece 140, the battery 100 enters the closed-end formation station to perform closed-end formation, and the injection piece 300 penetrates the sealing piece 140 again.
  • the exhaust device may extract the internal gas of the battery 100 through the injection piece 300, and the internal gas includes the reaction gas generated by the battery 100 during the closed-end formation process.
  • the injection device may inject another portion of electrolyte into the interior of the battery 100 through the injection piece 300 to complete the closed-end formation of the battery 100. Injection process.
  • the sealing member 140 may be an elastic material.
  • the injection method 20 or the injection method 30 may further include: pulling the injection member out of the sealing member, wherein after the injection member is pulled out, the sealing member elastically deforms to reduce the gap formed by the injection member in the sealing member.
  • the sealing member 140 is an elastic material capable of elastic deformation, which can be pierced by the injection member 300, and can automatically elastically deform to "heal" the gap formed by the injection member 300 after the injection member 300 is withdrawn.
  • the material of the sealing member 140 may include rubber, which has better elastic deformation performance.
  • the sealing member 140 can also be reused as a sealing member of the battery 100 during normal use to seal the injection port 1312 of the battery 100.
  • the technical solution of this embodiment is conducive to comprehensively improving the manufacturing performance and use performance of the battery 100 during the injection process.
  • Fig. 7 shows a schematic flow chart of another battery injection method 40 provided in an embodiment of the present application.
  • the injection method 40 can also be applied to the battery 100 shown in the above embodiment.
  • the battery injection method 40 may include the following steps.
  • a liquid injection safety device is provided on the battery, wherein a liquid injection passage corresponding to the sealing member is formed in the liquid injection safety device.
  • S403 inserting the injection piece into the injection piece channel, so that the injection piece penetrates the sealing piece through the injection piece channel to enter the interior of the battery.
  • S404 Discharge the internal gas of the battery through the liquid injection piece.
  • S405 injecting electrolyte into the battery through the injection piece.
  • steps S401, S404 and S405 can refer to the relevant description of the embodiment shown in FIG6 above, and will not be described in detail here. It may be an implementation of step S302 shown in FIG. 6 above.
  • Figures 8 and 9 show a schematic structural diagram corresponding to steps S402 and S403 shown in Figure 7.
  • Figure 9 is a schematic cross-sectional view of the battery 100 shown in Figure 8 along the B-B' direction.
  • the battery 100 is provided with a liquid injection safety device 200, 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 liquid injection member 300 can penetrate the sealing member 140 through the liquid injection passage 210 in the liquid injection safety device 200 and enter the interior of the battery 100.
  • the battery production line may be equipped with a control device for the liquid injection safety device, and the control device may control the liquid injection safety device 200 to be set on the wall where the liquid injection port 1312 of the battery 100 is located.
  • the liquid injection member channel 210 in the liquid injection safety device 200 may correspond to the sealing member 140 at the liquid injection port 1312.
  • the sealing member 140 may be set at the channel opening of the liquid injection member channel 210.
  • the injection piece 300 can move in the vertical direction into the injection piece channel 210, and then reach the sealing piece 140 located at the channel opening of the injection piece channel 210. After the injection piece 300 pierces the sealing piece 140, it can enter the interior of the battery 100 to achieve the subsequent discharge of the gas inside the battery 100 and the injection of electrolyte into the interior of the battery 100.
  • the battery 100 is equipped with a liquid injection safety device 200.
  • the liquid injection piece 300 does not directly pierce the battery 100, but first passes through the liquid injection piece channel 210 in the liquid injection safety device 200 and then pierces the seal 140 corresponding to the liquid injection piece channel 210.
  • the liquid injection piece 300 is pierced off and affects the performance of other components (such as electrode terminals, etc.) in the battery 100.
  • the liquid injection safety device 200 is used to protect the battery 100, and the liquid injection piece 300 can be more accurately penetrated into the seal 140 through the liquid injection piece channel 210, reducing the possibility of the liquid injection piece 300 piercing off and affecting the battery 100, thereby improving the manufacturing performance of the battery 100 during the liquid injection process and the reliability of the battery 100.
  • the liquid filling safety device 200 may include a liquid filling safety cap, and the step S402 may include: fastening the liquid filling safety cap to the battery.
  • the liquid filling safety cap may include a cover body and an annular wall, wherein the cover body is arranged corresponding to the wall where the liquid filling port 1312 in the battery 100 is located, and the annular wall is connected to the side of the cover body facing the battery 100. After the liquid filling safety cap is buckled on the battery 100, the annular wall can be arranged around the battery 100.
  • the liquid injection member channel 210 is formed in the cover of the liquid injection safety cap, and the liquid injection member channel 210 passes through the cover of the liquid injection safety cap.
  • the axial direction of the liquid injection member channel 210 can be perpendicular to the wall where the liquid injection port 1312 of the battery 100 is located, so that the liquid injection member 300 can vertically penetrate the sealing member 140 located at the liquid injection port 1312 and accurately enter the interior of the battery 100 for exhaust and liquid injection.
  • the seal 140 located at the injection port 1312 is also arranged at the center of the wall, and the injection member channel 210 can also be formed correspondingly at the center of the cover body of the injection safety cap.
  • the liquid injection safety device 200 is designed as a liquid injection safety cap, which is conducive to the liquid injection safety cap being fixed to the battery 100 more conveniently and reliably.
  • the positional relationship between the liquid injection safety cap and the battery 100 is relatively fixed, so that the liquid injection piece 300 can penetrate into the interior of the battery 100 more accurately through the liquid injection safety cap, which is conducive to further improving the manufacturing performance of the battery 100 during the liquid injection process.
  • the liquid filling safety device 200 may be designed as other forms besides a liquid filling safety cap, such as a plate-like structure, etc., which is not specifically limited in the embodiments of the present application.
  • FIG. 10 shows a schematic enlarged cross-sectional view of the liquid injection safety device 200 in the embodiment shown in FIG. 8 and FIG. 9 .
  • a first inclined guide groove 220 is formed at one end of the injection piece channel 210 away from the battery 100, and the inclined surface of the first inclined guide groove 220 is inclined relative to the axial direction of the injection piece channel 210.
  • the first inclined guide groove 220 is used to guide the injection piece 300 into the injection piece channel 210.
  • the end of the injection member channel 210 away from the battery 100 can be the inlet end of the injection member channel 210, that is, the injection member 300 enters from the inlet end of the injection member channel 210.
  • a first inclined guide groove 220 is provided at the inlet end of the injection member channel 210, which can By enlarging the diameter of the injection piece channel 210 at the inlet end, the injection piece 300 can enter the injection piece channel 210 more conveniently and smoothly, and the probability of the injection piece 300 getting stuck at the inlet end of the injection piece channel 210 can be reduced, thereby further improving the manufacturing performance of the battery 100 during the injection process.
  • the first inclined surface guide groove 220 may include a conical surface guide groove.
  • the first inclined surface guide groove 220 may be a truncated cone structure, and its side surface is a conical surface.
  • the upper bottom of the first inclined surface guide groove 220 is a side away from the battery 100, and the lower bottom of the first inclined surface guide groove 220 is a side facing the battery 100.
  • the upper bottom area of the first inclined surface guide groove 220 may be greater than the lower bottom area.
  • the first inclined guide groove 220 is designed as a conical guide groove, so that the first inclined guide groove 220 can have a smooth surface, thereby facilitating a good guiding effect on the injection piece 300, further reducing the probability of the injection piece 300 getting stuck in the injection piece channel 210, and improving the manufacturing performance of the battery 100 during the injection process.
  • the first inclined guide groove 220 may be designed as a truncated cone structure with a conical surface, or may be other types of structures such as a truncated cone, which is not specifically limited in the embodiments of the present application.
  • a second inclined guide groove 230 may be provided at one end of the liquid filling safety cap that is buckled onto the battery 100, and the inclined surface of the second inclined guide groove 230 is inclined relative to the wall of the battery 100, and the second inclined guide groove 230 is used to guide the battery 100 to buckle onto the liquid filling safety cap.
  • the end of the injection safety cap that is buckled with the battery 100 may be the end of the annular wall in the injection safety cap, and the inner circumferential surface of the annular wall may be provided with a second inclined guide groove 230.
  • the second inclined guide groove 230 may enlarge the inner diameter of the injection safety cap, thereby allowing the battery 100 to have a larger displacement margin. Even if the battery 100 is not completely positionally corresponding to the injection safety cap, but has a certain positional offset, the injection safety cap can be smoothly buckled with the battery 100 through the second inclined guide groove 230, thereby further improving the production efficiency of the battery 100 during the injection process.
  • the second inclined surface guide groove 230 may also include a conical surface guide groove.
  • the second inclined surface guide groove 230 may be a truncated cone structure, and its side surface is a conical surface.
  • the upper bottom of the second inclined surface guide groove 230 is a side facing the injection member channel 210.
  • the lower bottom of the second inclined surface guide groove 230 is a side away from the injection member channel 210, and the upper bottom area of the second inclined surface guide groove 230 may be smaller than the lower bottom area.
  • the second inclined guide groove 230 is designed as a conical guide groove, so that the second inclined guide groove 230 can have a smooth surface, thereby facilitating a good guiding effect on the battery 100, so that the battery 100 can be stably and reliably engaged with the liquid filling safety cap, further improving the manufacturing performance of the battery 100 during the liquid filling process.
  • the liquid injection safety device 200 is further provided with a first receiving groove 240 , and the first receiving groove 240 is used to receive the electrode terminal 1311 of the battery 100 .
  • the electrode terminal 1311 of the battery 100 is also arranged on the wall where the liquid injection port 1312 of the battery 100 is located.
  • the liquid injection safety device 200 is formed with a first accommodating groove 240 on the surface of the wall facing the wall, so as to facilitate the accommodation of the electrode terminal 1311 of the battery 100 and enable the liquid injection safety device 200 and the battery 100 to be accurately aligned, thereby improving the correspondence between the liquid injection channel 210 in the liquid injection safety device 200 and the sealing member 140 at the liquid injection port 1312, so as to further improve the manufacturing performance of the battery 100 during the liquid injection process.
  • the shape of the first receiving groove 240 matches the shape of the electrode terminal 1311 .
  • the first receiving groove 240 may be an annular receiving groove.
  • the alignment accuracy between the two is high, and a close fit can be achieved, thereby improving the connection stability between the liquid injection safety device 200 and the battery 100.
  • the gap between the first receiving groove 240 and the electrode terminal 1311 is small, and the first receiving groove 240 can play a good protective role on the electrode terminal 1311, thereby reducing the interference and influence of the external environment on the electrode terminal 1311 during the liquid injection process.
  • a second receiving groove 250 is further provided in the liquid injection safety device 200 , and the second receiving groove 250 can be used to receive the sealing member 140 .
  • the second receiving groove 250 is disposed at the outlet end of the injection member channel 210, so as to accommodate the sealing member 140 corresponding to the injection member channel 210.
  • the shape of the second receiving groove 250 can also be designed to match the sealing member 140, so as to provide good protection for the sealing member 140. Reduce the interference and influence of the external environment on the sealing element 140 during the injection process.
  • FIG. 11 shows another schematic enlarged cross-sectional view of the liquid injection safety device 200 provided in an embodiment of the present application.
  • an air guide groove 260 is further provided in the liquid filling safety device 200 , and the air guide groove 260 is connected to the first surface of the liquid filling safety device 200 attached to the battery 100 and the surface of the liquid filling safety device 200 facing the external environment.
  • liquid filling safety device 200 when the liquid filling safety device 200 is arranged corresponding to the battery 100, for example, when the liquid filling safety device 200 is a liquid filling safety cap, which is buckled on the battery 100, most of the surface of the liquid filling safety device 200 facing the battery 100 can be attached to the wall of the battery 100, so that the liquid filling safety device 200 and the battery 100 have a higher degree of fit and a stable connection.
  • the gap between the first surface and the battery 100 is small, so a small pressure or even a negative pressure is easily formed between the two.
  • the liquid injection safety device 200 is separated from the battery 100 after the liquid injection is completed, the small pressure or even the negative pressure between the two will make it difficult for the liquid injection safety device 200 to be separated from the battery 100, thereby affecting the production efficiency of the battery 100.
  • an air guide groove 260 is provided in the liquid filling safety device 200, and the air guide groove 260 is connected to the first surface of the liquid filling safety device 200 attached to the battery 100 and the surface of the liquid filling safety device 200 facing the external environment.
  • the air guide groove 260 can introduce atmospheric gas in the external environment into the gap between the first surface of the liquid filling safety device 200 and the battery 100, thereby increasing the pressure between the liquid filling safety device 200 and the battery 100, facilitating the liquid filling safety device 200 to be separated from the battery 100, thereby improving the production efficiency of the battery 100.
  • the air guide groove 260 is connected to a first surface of the liquid filling safety device 200 attached to the battery 100 and a second surface of the liquid filling safety device 200 opposite to the first surface.
  • the second surface opposite to the first surface is a surface of the liquid injection safety device 200 away from the battery 100 , and the second surface is one of the surfaces of the liquid injection safety device 200 facing the external environment.
  • the air guide groove 260 may be a straight groove that passes through the liquid injection safety device 200.
  • the radial dimension of the air-conducting channel can be designed to be smaller, for example, the radial dimension of the air-conducting channel can be smaller than the radial dimension of the injection member channel 210.
  • the radial dimension of the air-conducting channel is designed to be smaller, the possibility of interference in the external environment contacting the battery 100 through the air-conducting channel can be reduced, thereby reducing the interference and influence of the external environment on the battery 100.
  • the air guide groove 260 is designed to connect the opposite first surface and the second surface, which can facilitate the manufacture of the air guide groove 260 in the liquid injection safety device 200 and reduce the overall manufacturing cost of the liquid injection safety device 200.
  • the air guide groove 260 may also be designed as a curved or bent straight air guide channel.
  • the embodiment of the present application does not limit the shape design of the air guide groove 260.
  • the air guide groove 260 can be connected to the first surface and the surface facing the external environment in the liquid injection safety device 200, and can also be connected to the first surface and the liquid injection member channel 210. Specifically, after the liquid injection member 300 is withdrawn from the liquid injection member channel 210, the liquid injection member channel 210 can also be connected to the atmospheric environment. In the case where the air guide groove 260 is connected to the first surface and the liquid injection member channel 210, the air guide groove 260 can also guide the atmospheric gas to the first surface.
  • there may be multiple air guide grooves 260 which may be respectively disposed on both sides of the liquid injection passage 210 , thereby further reducing the possibility of a lower pressure or even a negative pressure being formed between the liquid injection safety device 200 and the battery 100 .
  • the length L1 of the injection member channel 210 and the length L2 of the target segment in the injection member 300 may satisfy: L1 ⁇ 2 ⁇ L2, wherein the target segment is located at one end of the injection member 300 facing the inside of the battery 100 and outside the injection member channel 210.
  • the target segment is located at the needle end of the injection needle.
  • the length L1 of the liquid injection member channel 210 may include the depth of the first inclined guide groove 220 .
  • the length of the injection piece 300 in the injection piece channel 210 is the length L1 of the injection piece channel 210 , and the partial section of the injection piece 300 in the injection piece channel 210 can be constrained by the injection piece channel 210 to control the skewness of the injection piece 300 .
  • the end of the injection piece 300 passes through the injection piece channel 210 and enters the inner part of the battery 100. Therefore, a portion of the end of the injection piece 300 (i.e., the target segment) will be located outside the injection piece channel 210, and at least a portion of the target segment is located inside the battery 100.
  • the injection port 1312 of the battery 100 is provided with a sealing member 140, at least a portion of the target segment is located in the sealing member 140.
  • the injection piece channel 210 can play a good restraining role on the injection piece 300, reduce the overall skewness of the injection piece 300, and enable the injection piece 300 to enter the injection port 1312 of the battery 100 at a better angle to reduce the interference and influence of the injection piece 300 on the structural parts of the injection port 1312.
  • the injection piece 300 can penetrate the sealing member 140 at a better angle, so that the injection piece 300 can effectively and quickly pass through the sealing member 140 to enter the interior of the battery 100.
  • the diameter D1 of the liquid injection piece 300 and the diameter D2 of the liquid injection piece channel 210 satisfy: 0 ⁇ (D2-D1)/D1 ⁇ 0.15.
  • the diameter D2 of the injection piece channel 210 is greater than the diameter D1 of the injection piece 300 , that is, D2 ⁇ D1 > 0, so that the injection piece 300 can smoothly pass through the injection piece channel 210 .
  • the difference (D2-D1) between the diameter D2 of the injection member channel 210 and the diameter D1 of the injection member 300 also satisfies (D2-D1)/D1 ⁇ 0.15.
  • the difference between the diameter D2 of the injection member channel 210 and the diameter D1 of the injection member 300 can be small, so that the injection member channel 210 plays a good restraining role on the injection member 300, and the injection member 300 with a large skewness cannot enter the interior of the battery 100 through the injection member channel 210.
  • the overall skewness of the injection member 300 can be reduced, so that the injection member 300 can enter the injection port 1312 of the battery 100 at a better angle to reduce the interference and influence of the injection member 300 on the structural parts of the injection port 1312.
  • the material of the liquid injection safety device 200 may include a high molecular polymer.
  • the high molecular polymer includes but is not limited to poly-ether-ether-ketone (PEEK) and the like.
  • the The shell of the battery 100 is generally made of metal material.
  • the material of the liquid injection safety device 200 can be a non-metallic high polymer.
  • the high polymer can have good wear resistance, high strength and high corrosion resistance, so it can be stably and reliably used in the liquid injection process of the battery 100, and has little impact on the battery 100 while playing a role in safety protection.
  • Fig. 12 shows a schematic flow chart of another battery injection method 50 provided in an embodiment of the present application.
  • the injection method 50 can also be applied to the battery 100 shown in the above embodiment.
  • the battery injection method 50 may include the following steps.
  • S502 Insert the liquid injection piece into the sealing piece so that the liquid injection piece passes through the sealing piece and enters the interior of the battery.
  • steps S501 to S504 can refer to the relevant description of the above embodiment, and will not be elaborated here.
  • step S505 may be performed after step S504, that is, after the battery is injected with liquid using the injection piece and the injection piece is removed from the sealing piece, the end of the injection piece is inspected so that the subsequent battery injection process can be reliably and smoothly performed.
  • step S505 may also be performed before step S502, that is, before the injection piece is inserted into the seal, that is, the end of the injection piece is detected so that the current battery injection process can be reliably and smoothly performed.
  • step S505 may be executed before step S502 or again after step S504.
  • the detection of the end portion of the injection piece in step S505 is the detection of the needle tip of the injection needle.
  • the above step S505 may include: controlling the injection piece to move along a preset moving path, wherein a first sensor is provided in the preset moving path; and using the first sensor to detect the movement of the end of the injection piece to detect whether the end of the injection piece is intact.
  • the first sensor may be used to detect the movement of the needle tip of the injection needle to detect whether the needle tip of the injection piece is intact.
  • FIG13 shows a schematic structural diagram of the first sensor 410 and the liquid injection piece 300 in this embodiment.
  • a first sensor 410 can be configured for the injection piece 300.
  • the first sensor 410 can be set in a preset moving path P pre-designed for the end of the injection piece 300.
  • the first sensor 410 can be used to detect the integrity of the end of the injection piece 300.
  • the first sensor 410 may be correspondingly disposed below the liquid injection piece 300 , and the liquid injection piece 300 moves toward the first sensor 410 along a preset moving path P in a vertical direction.
  • the preset moving path P may be located in the axial direction of the liquid injection member 300 .
  • the liquid injection member 300 may move along the preset moving path P in its axial direction.
  • the first sensor 410 can be set at the end point of the preset moving path P, and the first sensor 410 can be used to detect whether the end of the injection piece 300 is in contact with it, thereby detecting whether the end of the injection piece 300 is intact.
  • the first sensor 410 can be disposed downstream of a preset moving path P.
  • the injection piece 300 moves in the preset moving path P, it can drive the first sensor 410 to move.
  • the first sensor 410 can detect the moving stroke of the end of the injection piece 300, thereby detecting whether the end of the injection piece 300 is intact.
  • a first sensor 410 is provided for the injection piece 300, and the first sensor 410 can be used to detect the integrity of the end of the injection piece 300, thereby reducing the injection time.
  • the effect of missing end of the part 300 on the injection process of the battery 100 for example, reducing the possibility that the needle tip of the injection needle cannot pierce the sealing member 140, and/or reducing the effect of metal particles dropped by the missing injection part 300 on the battery 100.
  • the first sensor 410 is arranged at the end point of a preset moving path P.
  • the end of the injection piece 300 contacts the first sensor 410, it is detected that the end of the injection piece 300 is intact; when the end of the injection piece 300 does not contact the first sensor 410, it is detected that the end of the injection piece 300 is missing.
  • the length of the preset moving path P can be designed according to actual needs
  • the first sensor 410 can be set at the end of the preset moving path P
  • the initial position of the injection piece 300 can be set at the starting point of the preset moving path P.
  • the end of the injection piece 300 is missing, even if the end of the injection piece 300 moves the length of the preset moving path P, the end of the injection piece 300 cannot contact the first sensor 410, and the first sensor 410 cannot detect the contact signal of the end of the injection piece 300, thereby detecting that the end of the injection piece 300 is missing.
  • the first sensor 410 can effectively and reliably detect the integrity of the end of the liquid injection piece 300 by detecting the contact of the end of the liquid injection piece 300.
  • the structure of the first sensor 410 is easy to implement and has high reliability, which is conducive to reducing the cost of the end detection device of the liquid injection piece 300 and thus reducing the production line cost of the battery 100.
  • the first sensor 410 may also be disposed downstream of a preset moving path P, and when the moving stroke of the end of the injection piece 300 is greater than or equal to a preset threshold, it detects that the end of the injection piece 300 is intact; when the moving stroke of the end of the injection piece 300 is less than the preset threshold, it detects that the end of the injection piece 300 is missing.
  • the first sensor 410 is not in a fixed state, and it can be displaced under the action of the injection piece 300.
  • the first sensor 410 can be set on a fixed platform by an elastic member, and the elastic member can be elastically deformed along the direction of the preset moving path P.
  • the end of the injection piece 300 contacts the first sensor 410 the end of the injection piece 300 does not reach
  • the liquid injection member 300 can continue to move along the preset moving path P.
  • the liquid injection member 300 can drive the first sensor 410 to move along the preset moving path P.
  • the first sensor 410 can detect the movement stroke of the injection piece 300 after contacting the first sensor 410.
  • the movement stroke of the end of the injection piece 300 that can be detected by the first sensor 410 is larger.
  • the movement stroke of the end of the injection piece 300 that can be detected by the first sensor 410 is smaller.
  • the first sensor 410 can determine whether the end of the injection piece 300 is complete by determining whether the movement stroke of the end of the injection piece 300 is greater than a certain preset threshold.
  • the preset threshold can be designed according to the length of the preset movement path P and the specific position of the first sensor 410 in the preset movement path P. The embodiment of the present application does not specifically limit the preset threshold.
  • the first sensor 410 can not only detect the integrity of the end of the injection piece 300, but also further detect the degree of missing of the end of the injection piece 300 according to the movement stroke of the end of the injection piece 300. For example, when the end of the injection piece 300 is intact, the movement stroke of the end of the injection piece 300 detected by the first sensor 410 is equal to a preset threshold value, and when the end of the injection piece 300 is missing, the missing length of the end of the injection piece 300 is the difference between the preset threshold value and the movement stroke actually detected.
  • the first sensor 410 can effectively and reliably detect the integrity of the end of the liquid injection piece 300 by detecting the movement stroke of the end of the liquid injection piece 300. On this basis, the first sensor 410 can further detect the degree of end missing of the liquid injection piece 300, thereby playing a more comprehensive detection role for the liquid injection piece 300.
  • the first sensor 410 may optionally be used to detect other characteristics of the liquid injection piece 300 , such as detecting the skewness of the liquid injection piece 300 .
  • step S505 in the embodiment shown in FIG. 12 may include: controlling the injection piece to move along a preset moving path, a second sensor is provided in the preset moving path, and a detection channel for passing the injection piece is formed in the second sensor; and using the detection channel in the second sensor to detect whether the end of the injection piece is skewed.
  • the detection channel in the second sensor may be used to detect whether the needle tip of the injection piece is skewed.
  • FIG. 14 shows a schematic structural diagram of the second sensor 420 and the liquid injection piece 300 in this embodiment.
  • a second sensor 420 can be configured for the injection piece 300.
  • the second sensor 420 can be set in a preset movement path P pre-designed for the end of the injection piece 300.
  • the preset movement path P can be located in the axial direction of the injection piece 300.
  • a detection channel 421 is formed in the second sensor 420, and a preset moving path P can pass through the detection channel 421.
  • the second sensor 420 can detect whether the end of the injection piece 300 is skewed.
  • the detection channel 421 in the second sensor 420 may be coaxially disposed with the liquid injection member 300.
  • the preset moving path P may be coaxial with the central axis of the detection channel 421 and the liquid injection member 300.
  • a second sensor 420 is provided for the injection piece 300.
  • the second sensor 420 can be used to detect whether the end of the injection piece 300 is skewed, thereby reducing the impact of the end of the injection piece 300 on the injection process of the battery 100 when it is skewed, for example, reducing the possibility that a skewed injection needle cannot pierce the seal 140, and/or reducing the possibility that a skewed injection piece 300 is deflected and penetrates into other parts of the battery 100 except the injection port 1312, thereby improving the manufacturing performance of the battery 100 during the injection process and the reliability of the battery 100.
  • the end of the injection piece 300 contacts the inner circumference of the detection channel 421 in the second sensor 420, it can be detected that the end of the injection piece 300 is skewed; when the end of the injection piece 300 does not contact the inner circumference of the detection channel 421, it can be detected that the end of the injection piece 300 is not skewed.
  • the second sensor 420 may be a contact sensor.
  • the detection channel 421 in the second sensor 420 is coaxially arranged with the injection piece 300.
  • the size of the detection channel 421 in the second sensor 420 may be designed according to the skewness requirement of the injection piece 300 during the actual injection process. When the end of the injection piece 300 has a high skewness, when the end of the injection piece 300 passes through the detection channel 421, the end will contact the inner circumference of the detection channel 421, so that the second sensor 420 can detect the contact signal of the end, and then judge whether the end of the injection piece 300 is in a state of being ...
  • the end of the liquid injection part 300 when the end of the liquid injection part 300 is less skewed or not skewed, the end of the liquid injection part 300 can smoothly pass through the detection channel 421 without contacting the inner circumference of the detection channel 421, and the second sensor 420 cannot detect the contact signal of the end, and then judges that the end is not skewed.
  • the end skew of the injection piece 300 may be the skew of the end of the injection piece 300 relative to the axial direction of the injection piece 300.
  • the needle tip skew of the injection needle may be the skew of the needle tip of the injection needle relative to the axial direction of the injection needle.
  • the second sensor 420 can effectively and reliably detect the skewness of the end of the liquid injection piece 300 by detecting the contact of the end of the liquid injection piece 300.
  • the structure of the second sensor 420 is easy to implement and has high reliability, which is conducive to reducing the cost of the end detection device of the liquid injection piece 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 piece 300 provided in an embodiment of the present application.
  • the battery production line can be configured with a first sensor 410 and a second sensor 420 at the same time, and the first sensor 410 and the second sensor 420 are both arranged in a preset moving path P pre-designed for the end of the liquid injection piece 300.
  • the second sensor 420 is arranged upstream of the first sensor 410, and the liquid injection piece 300 can move toward the first sensor 410 after passing through the detection channel 421 in the second sensor 420.
  • the second sensor 420 is arranged upstream of the first sensor 410, and the detection channel 421 therein will not affect the movement of the injection piece 300 in the preset moving path P while detecting the skewness of the end of the injection piece 300.
  • the injection piece 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 integrity of the end of the injection piece 300.
  • a certain gap may be provided between the second sensor 420 and the first sensor 410 to reduce the mutual interference that may be caused between the first sensor 410 and the second sensor 420 .
  • the second sensor 420 and the first sensor 410 can be fixed by the same fixing device so that the relative position relationship between the second sensor 420 and the first sensor 410 is fixed.
  • the two sensors can not only detect the injection part 300 more accurately, but also It can move in the battery production line at the same time, so as to facilitate repeated testing of the liquid injection part 300 and improve the battery injection efficiency.
  • a first sensor 410 and a second sensor 420 are simultaneously provided for the injection piece 300.
  • the first sensor 410 can be used to detect whether the end of the injection piece 300 is intact, and the second sensor 420 can be used to detect whether the end of the injection piece 300 is skewed, thereby improving the comprehensiveness of the detection of the injection piece 300, greatly reducing the impact of abnormal conditions at the end of the injection piece 300 on the injection process of the battery 100, and improving the manufacturing performance of the battery 100 during the injection process.
  • the second sensor 420 is arranged upstream of the first sensor 410, and the relative position relationship between the two is designed to be relatively compact and reasonable. While being able to provide integrity and skewness detection for the injection piece 300 at the same time, the two sensors do not need to occupy much equipment space.
  • the first sensor 410 may be disposed inside the accommodating cavity, and the second sensor 420 may cover the accommodating cavity.
  • the first sensor 410 and the second sensor 420 may be compactly and stably disposed together, and the second sensor 420 may be located upstream of the first sensor 410.
  • first sensor 410 and the second sensor 420 may also be assembled together in other fixing ways so that the relative positional relationship between the two is fixed. This embodiment of the present application does not specifically limit this.
  • the first sensor 410 and the second sensor 420 may also be connected to a processing module 430 via electrical connectors such as signal lines, and the processing module 430 is used 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.
  • the processing module 430 may be an electrical module having a data processing function and/or a control function, such as a controller or a processor, etc.
  • the first sensor 410 and the second sensor 420 transmit the detection signals obtained by the detection for characterizing the integrity and skewness of the liquid injection part 300 to the processing module 430, and the processing module 430 may control the liquid injection part 300 whether to continue to perform the subsequent liquid injection process according to the detection signals.
  • the processing module 430 can also control whether the first sensor 410 and the second sensor 420 start to detect the liquid injection part 300.
  • the processing module 430 can simultaneously control The liquid injection part 300 starts to move along the preset moving path P, and the first sensor 410 and the second sensor 420 are controlled to start detection, so as to improve the effectiveness of the detection of the liquid injection part 300.
  • the first sensor 410 and the second sensor 420 do not need to be in the working state, which is conducive to reducing the power consumption required during the detection of the liquid injection part 300.
  • the preset moving path P of the liquid injection member 300 is the same as the liquid injection moving path when the liquid injection member 300 injects liquid into the battery 100 .
  • the battery 100 and the detection device for performing the injection piece detection can be in a mobile state, and the battery 100 and the detection device can be moved to the position corresponding to the injection piece 300 in a time-sharing manner according to actual needs, so that the injection piece 300 injects liquid into the battery 100 or the detection device detects the injection piece 300.
  • the detection device for performing the injection piece detection includes the first sensor 410 and/or the second sensor 420 in the above embodiment.
  • the battery 100 can be moved to a target position corresponding to the injection piece 300, for example, the battery 100 can be moved directly below the injection piece 300.
  • the injection piece 300 can pierce the sealing member 140 in the battery 100 to enter the interior of the battery 100, and the injection device can inject electrolyte into the interior of the battery 100 through the injection piece 300.
  • the detection device Before or after the liquid injection piece 300 injects liquid into the battery 100, the detection device can be moved to a target position, which is the same as the position of the battery 100 during the liquid injection process.
  • the liquid injection piece 300 moves along the preset moving path P again, so that the first sensor 410 in the detection device performs an end integrity detection on the liquid injection piece 300, and the second sensor 420 in the detection device performs an end skewness detection on the liquid injection piece 300.
  • the liquid injection part 300 can have only one moving path, which can complete the liquid injection of the liquid injection part 300 to the battery 100 and the detection of the liquid injection part 300 by the detection device, and the control method of the liquid injection part 300 is relatively simple and easy to implement.
  • the liquid injection process and the detection process of the liquid injection part 300 use the same moving path, which can facilitate the adaptive adjustment of the position of the sensor in the detection device according to the different sizes and shapes of the battery 100, so as to conveniently realize that the liquid injection part 300 can not only inject liquid into batteries 100 of various sizes and shapes, but also use the detection device to detect the liquid injection part 300.
  • the first sensor 410 is configured to be able to move along the extension direction of the preset moving path P.
  • the distance between the first sensor 410 and the liquid injection piece 300 is adjustable.
  • the first sensor 410 is not fixedly disposed in the accommodating chamber, and an adjustment module may be provided between one end of the first sensor 410 facing the bottom of the accommodating chamber and the bottom of the accommodating chamber.
  • an adjustment module may be provided between one end of the first sensor 410 facing the bottom of the accommodating chamber and the bottom of the accommodating chamber.
  • the initial distance between the first sensor 410 and the injection piece 300 is adjustable, and the initial distance between the first sensor 410 and the injection piece 300 can be designed according to the distance between the injection piece 300 and the battery 100.
  • the injection movement path of the injection piece 300 will change synchronously, and the initial distance between the first sensor 410 and the injection piece 300 and the preset movement path P during the detection process will also change synchronously to adapt to the injection movement path of the injection piece 300, so that the first sensor 410 can be applied to the detection of the injection piece 300 of batteries 100 of various models or external dimensions.
  • the moving distance of the first sensor 410 in the extension direction of the preset moving path P can be between 0 and 50 mm.
  • This moving distance range can be adapted to the size of most batteries in the related art. Therefore, the first sensor 410 provided in the embodiment of the present application can be applied to the liquid injection parts of most batteries in the related art, which is conducive to the promotion and use of the first sensor 410 in the battery production line.
  • Fig. 16 shows a schematic flow chart of another battery injection method 60 provided in an embodiment of the present application.
  • the injection method 60 can also be applied to the battery 100 shown in the above embodiment.
  • the battery injection method 60 may include the following steps.
  • a sealing member is provided at the liquid filling port of the battery.
  • a liquid injection safety device is provided on the battery, wherein a liquid injection passage corresponding to the sealing member is formed in the liquid injection safety device.
  • S604 Discharge the internal gas of the battery through the liquid injection piece.
  • S605 Inject electrolyte into the battery through the injection piece.
  • S607 Use the first sensor to detect whether the end of the liquid injection piece is intact.
  • S608 Use the second sensor to detect whether the end of the liquid injection piece is skewed.
  • the battery 100 may be provided with a liquid injection port 1312.
  • a seal 140 may be provided on the liquid injection port 1312 of the battery 100 using a seal installation device in a battery production line.
  • the seal 140 may be a rubber member, and as an example, the seal 140 may be a rubber nail.
  • a liquid injection safety device 200 is provided on the battery 100 .
  • the liquid injection safety device 200 may be a liquid injection safety cap, which may be buckled onto the wall where the liquid injection port 1312 of the battery 100 is located, so as to achieve stable installation of the liquid injection safety cap on the battery 100 .
  • a liquid injection passage 210 corresponding to the sealing member 140 of the battery 100 is formed in the liquid injection safety device 200 .
  • the liquid injection member 300 can penetrate the sealing member 140 through the liquid injection passage 210 in the liquid injection safety device 200 , and then enter the interior of the battery 100 .
  • the liquid injection safety device 200 can protect the battery 100, reducing the possibility of the liquid injection piece 300 being punctured and affecting the battery 100, thereby improving the manufacturing performance of the battery 100 during the liquid injection process and the reliability of the battery 100.
  • the material of the liquid injection safety device 200 may include a high molecular polymer, such as PEEK, etc.
  • the liquid injection safety device 200 causes less wear on the metal shell of the battery 100 and can be stably and reliably applied in the liquid injection process of the battery 100.
  • a suction device may be connected to the liquid injection piece 300, and the suction device is used to extract the internal gas of the battery 100 through the liquid injection piece 300.
  • a negative pressure may be formed inside the battery 100.
  • the internal gas of the battery 100 extracted by the gas extraction device may be the gas generated by the battery 100 during the closed-end formation process.
  • the liquid injection device may inject a portion of electrolyte into the battery 100 through the liquid injection member 300, and after the liquid injection member 300 is removed from the sealing member 140, the battery 100 performs the closed-end formation process. Afterwards, the liquid injection piece 300 re-inserts the sealing piece 140 , and the exhaust device can extract the gas generated by the battery 100 during the closed-mouth formation process through the liquid injection piece 300 .
  • the injection device may inject electrolyte into the battery 100 through the injection piece 300.
  • the electrolyte in the injection device may be quickly injected into the battery 100 through the injection piece 300.
  • the liquid injection device may inject the remaining electrolyte into the interior of the battery 100 through the liquid injection piece 300 to complete the entire liquid injection process of the battery 100 .
  • the injection piece 300 may be pulled out of the sealing piece 140.
  • the sealing piece 140 may be an elastic sealing piece, and after the injection piece 300 is pulled out, the elastic sealing piece may achieve "self-healing", that is, the elastic sealing piece may undergo elastic deformation to reduce the gap formed by the injection piece 300 in the elastic sealing piece, and the size of the gap may be very small or even negligible, so that the electrolyte inside the battery 100 will not leak out of the battery 100 through the gap.
  • the first sensor 410 may be used to detect whether the end of the injection piece 300 is intact.
  • the injection piece 300 may be controlled to move along a preset moving path P, and the first sensor 410 is located in the preset moving path P, for example, at the end or downstream of the preset moving path P.
  • the first sensor 410 may detect the contact of the injection piece 300 or the moving stroke of the injection piece 300, thereby detecting the integrity of the end of the injection piece 300.
  • the second sensor 420 may be used to detect whether the end of the injection piece 300 is skewed. Specifically, the injection piece 300 may be controlled to move along a preset moving path P, and the detection channel 421 in the second sensor 420 may be located in the preset moving path P. The second sensor 420 may detect whether the end of the injection piece 300 is skewed by detecting whether the end of the injection piece 300 contacts the inner circumference of the detection channel 421.
  • the preset moving path P is the same as the moving path of the injection piece 300 during the injection process.
  • the battery 100 can be moved first, and the detection device including the first sensor 410 and the second sensor 420 can be moved to the previous position of the battery 100, and the injection piece 300 can be controlled to move so that the injection piece 300 enters the detection device, and the first sensor 410 and the second sensor 420 respectively detect the integrity and skewness of the injection piece 300.
  • step S607 and step S608 After executing step S607 and step S608 to inspect the liquid injection part 300, the liquid injection part 300 is inspected.
  • the component 300 may perform liquid injection for the next battery 100 .
  • the detection of the liquid injection piece 300 involved in the above step S607 and step S608 may also be performed before the liquid injection process of the current battery 100 , for example, before step S602 or step S601 .
  • the above text illustrates the liquid injection method of the battery provided by the present application in conjunction with Figures 2 to 16, and the following text illustrates the liquid injection system of the battery provided by the present application in conjunction with Figure 17.
  • the liquid injection system of the battery can execute the liquid injection method in any of the above embodiments. It can be understood that the relevant technical solutions of the liquid injection system in the following embodiments can correspond to the relevant technical solutions of the liquid injection method in the above embodiments. The specific solution details can refer to the relevant description of the above embodiments, and no further details will be given below.
  • the liquid injection system 1 of the battery may include: a sealing member installation device 500, a liquid injection member 300, and a liquid injection device 600.
  • the sealing member installation device 500 is used to obtain the sealing member 140 and set the sealing member 140 at the liquid injection port 1312 of the battery 100
  • the liquid injection member 300 is used to pierce the sealing member 140 to enter the interior of the battery 100
  • the liquid injection device 600 is connected to the liquid injection member 300
  • the liquid injection device 600 is used to inject electrolyte into the interior of the battery 100 through the liquid injection member 300.
  • the battery injection system 1 further includes an injection safety device 200 .
  • the specific structure of the injection safety device 200 can be found in the relevant description of the embodiments shown in FIGS. 8 to 10 above.
  • the liquid injection safety device 200 is arranged on the battery 100, and a liquid injection channel 210 corresponding to the sealing member 140 is formed in the liquid injection safety device 200, and the liquid injection channel 210 is used to pass the liquid injection member 300 so that the liquid injection member 300 penetrates the sealing member 140 through the liquid injection channel 210 to enter the interior of the battery 100.
  • the liquid filling safety device 200 may include: a liquid filling safety cap, which is buckled on the battery 100 .
  • the battery injection system 1 further includes: an injection detection device 400, which is used to detect the end of the injection member 300.
  • the injection detection device 400 can be used to detect the needle tip of the injection needle.
  • the liquid injection member 300 may be configured to move along a preset moving path P
  • the liquid injection detection device 400 includes: a first sensor 410, which is arranged toward the end of the liquid injection member 300 and is located in the preset moving path P.
  • the first sensor 410 is used The movement of the end of the liquid injection piece 300 is detected to detect whether the end of the liquid injection piece 300 is complete.
  • the liquid injection detection device 400 may include: a second sensor 420, in which a detection channel 421 corresponding to the liquid injection piece 300 is formed, and the detection channel 421 is located in a preset moving path P, and the detection channel 421 is used to pass through the liquid injection piece 300 to detect whether the end of the liquid injection piece is skewed.
  • the specific structure and related technical solutions of the first sensor 410 and the second sensor 420 in the liquid injection detection device 400 can refer to the relevant description of the embodiments shown in Figures 13 to 15 above.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Filling, Topping-Up Batteries (AREA)

Abstract

一种电池的注液方法和注液系统。电池的注液方法包括：在电池的注液口设置密封件；向密封件刺入注液件以使得注液件穿过密封件进入电池的内部；通过注液件向电池的内部注入电解液，在通过注液件向电池的内部注入电解液之前，注液方法还包括：通过注液件排放电池的内部气体。在实施例提供的注液方法中，电池的注液口设置有密封件，且利用注液件刺穿密封件以进入电池的内部，使得注液件能够在电池的内部进行注液，以降低注液过程中电解液泄露造成的电解液污染问题，提升电池在注液过程中的制造性能以及电池的使用可靠性。

Description

电池的注液方法和注液系统
相关申请的交叉引用
本申请要求享有于2023年07月17日提交的名称为“电池的注液方法和注液系统”的中国专利申请202310873335.3的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请实施例涉及电池领域，并且更具体地，涉及一种电池的注液方法和注液系统。
背景技术
随着时代的发展，电动汽车由于其高环保性、低噪音、使用成本低等优点，具有巨大的市场前景且能够有效促进节能减排，有利社会的发展和进步。对于电动汽车而言，电池技术是关乎其发展的一项重要因素。
在电池技术的发展中，除了需要关注电池的充放电等电气性能以外，还需要关注电池的制造加工性能。例如，电解液作为电池的一种组成物，向电池壳体注入电解液的注液过程对于电池的整体性能也至关重要。鉴于此，如何提升电池在注液过程中的制造性能，是一项亟待解决的技术问题。
发明内容
本申请实施例提供一种电池的注液方法和注液系统，能够提升电池在注液过程中的制造性能。
第一方面，提供一种电池的注液方法，包括：在电池的注液口设置密封件；向密封件刺入注液件以使得注液件穿过密封件进入电池的内部；通过注液件向电池的内部注入电解液，在通过注液件向电池的内部注入电 解液之前，注液方法还包括：通过注液件排放电池的内部气体。
在本申请实施例提供的注液方法中，电池的注液口设置有密封件，且利用注液件刺穿密封件以进入电池的内部，使得注液件能够在电池的内部进行注液，以降低注液过程中电解液泄露造成的电解液污染问题，提升电池在注液过程中的制造性能以及电池的使用可靠性。另外，在向电池的密封件刺入注液件后，可首先利用该注液件排放电池内部的气体，然后再通过该注液件向电池的内部注入电解液，该排放的内部气体不会占用电池内部的容纳空间，有利于提升电池的能量密度以及产品性能。
在一些可能的实施方式中，上述通过注液件排放电池的内部气体，包括：通过注液件抽取电池的内部气体，以使得电池的内部形成负压。
相比于自然状态下电池的内部气体通过注液件向外部排放的过程，通过该实施方式的技术方案，利用抽气装置抽取电池的内部气体，可以提升该电池的内部气体的排放速率，从而提升电池的制造加工效率。另外，在电池的内部形成负压的情况下，处于常压环境中的电解液可快速通过注液件注入至电池的内部，不仅有利于提高注液速率以提高电池的制造加工效率，还可以降低注液过程中，电解液泄露或飞溅等问题发生的可能性，从而进一步提升电池在注液过程中的制造性能。
在一些可能的实施方式中，电池的内部气体包括电池在执行闭口化成的过程中产生的气体。
在实施方式提供的技术方案中，可通过注液件先抽取电池在闭口化成过程中产生的反应气体，再通过注液件向电池注入电解液，一方面可以增加电池中注入的电解液的容量，提升电池的整体性能，另一方面可以减少电池中的气体以降低电池的内部气压，降低电池发生爆炸的可能性。
在一些可能的实施方式中，密封件为弹性材料，在上述通过注液件向电池的内部注入电解液之后，注液方法还包括：将注液件抽离密封件，其中，在注液件抽离后，密封件弹性形变以减小注液件在密封件中形成的缺口。
在实施方式提供的技术方案中，在注液件抽离密封件之后，密封件弹性形变可以使得密封件中的缺口非常小乃至可以忽略不计，该十分微 小的缺口基本不会影响电池的密封性，因而，该密封件除了可以提升电池在注液过程中的制造性能以外，还可以复用作为电池在正常使用过程中的密封件以密封电池的注液口。通过该实施方式的技术方案，有利于综合提升电池在注液过程中的制造性能以及使用性能。
在一些可能的实施方式中，上述向密封件刺入注液件以使得注液件穿过密封件进入电池的内部，包括：在电池上设置注液安全装置，注液安全装置中形成有对应于密封件的注液件通道；向注液件通道刺入注液件，以使得注液件通过注液件通道刺入密封件以进入电池的内部。
通过该实施方式的技术方案，电池配置有注液安全装置，该注液安全装置能够对电池进行防护，且注液件能够较为准确的通过注液安全装置中的注液件通道刺入密封件，降低了注液件刺偏对电池造成影响的可能性，从而提升了电池在注液过程中的制造性能以及电池的使用可靠性。
在一些可能的实施方式中，注液安全装置包括：注液安全帽；其中，上述在电池上设置注液安全装置，包括：将注液安全帽扣合于电池。
通过该实施方式的技术方案，将注液安全装置设计为注液安全帽，有利于该注液安全帽较为便捷且可靠的固定设置于电池，注液安全帽与电池之间的位置关系相对固定，从而使得注液件能够较为精准的通过注液安全帽刺入电池的内部，有利于进一步提升电池在注液过程中的制造性能。
在一些可能的实施方式中，注液件通道远离于电池的一端形成有第一斜面导向槽，第一斜面导向槽的斜面相对于注液件通道的轴向倾斜设置，第一斜面导向槽用于引导注液件进入注液件通道。
通过该实施方式的技术方案，可以扩大注液件通道在入口端(即注液件通道远离于电池的一端)的直径，有利于注液件更为便捷且顺滑的进入注液件通道，降低该注液件在注液件通道的入口端发生卡顿的概率，从而进一步提升电池在注液过程中的制造性能。
在一些可能的实施方式中，第一斜面导向槽包括锥面导向槽。
通过该实施方式的技术方案，将第一斜面导向槽设计为锥面导向槽，可以使得该第一斜面导向槽具有光滑的表面，从而便于对注液件起到良好的引导作用，进一步降低注液件在注液件通道处发生卡顿的概率，提 升电池在注液过程中的制造性能。
在一些可能的实施方式中，注液安全帽扣合于电池的一端设置有第二斜面导向槽，第二斜面导向槽的斜面相对于电池的壁倾斜，第二斜面导向槽用于引导电池扣合于注液安全帽。
通过该实施方式的技术方案，第二斜面导向槽可以扩大注液安全帽的内径，从而允许电池具有较大的位移裕量，即使电池相比于注液安全帽具有一定的位置偏移，该注液安全帽也能通过该第二斜面导向槽顺滑的扣合于电池，从而进一步提升电池在注液过程中的生产效率。
在一些可能的实施方式中，第二斜面导向槽包括锥面导向槽。
通过该实施方式的技术方案，将第二斜面导向槽设计为锥面导向槽，可以使得该第二斜面导向槽具有光滑的表面，从而便于对电池起到良好的引导作用，使得电池能够稳定可靠与注液安全帽相互扣合，进一步提升电池在注液过程中的制造性能。
在一些可能的实施方式中，注液安全装置的材料包括高分子聚合物。
通过该实施方式的技术方案，该由高分子聚合物制造形成的注液安全装置可具有较佳的耐磨性、较高的强度和较高的耐腐蚀性，从而可稳定且可靠的应用于电池的注液过程中，在对电池起到安全防护的作用的同时，对电池造成的磨损和影响较小。
在一些可能的实施方式中，注液方法还包括：检测注液件的端部。在注液件包括注液针的情况下，注液方法还包括：检查注液件的针头。
通过本申请实施例的技术方案，在对电池进行注液的过程中，不仅利用注液件刺入电池的密封件以进行注液，还检测该注液件的端部，例如注液针的针头。在注液件的端部出现问题的时候，能够及时对该注液件进行更换，使得电池产线中多个电池的注液过程能够可靠执行，有利于进一步提升电池产线中多个电池在注液过程中的制造性能。
在一些可能的实施方式中，上述检测注液件的端部，包括：控制注液件沿预设移动路径移动，预设移动路径中设置有第一传感器；利用第一传感器检测注液件的端部的移动以检测该注液件的端部是否完整。
通过该实施方式的技术方案，对注液件设置第一传感器，该第一传感器能够用于检测注液件的端部完整性，降低注液件的端部出现缺失时对电池的注液过程造成的影响，例如，降低注液针的针头确实造成无法刺穿密封件的可能性，和/或，降低缺失的注液件掉落金属颗粒物对电池造成的影响。
在一些可能的实施方式中，第一传感器设置于预设移动路径的端点；其中，上述利用第一传感器检测注液件的端部的移动以检测注液件的端部是否完整，包括：在注液件的端部接触第一传感器的情况下，检测注液件的端部完整；在注液件的端部未接触第一传感器的情况下，检测注液件的端部缺失。
通过该实施方式的技术方案，第一传感器能够通过检测注液件的端部的接触对注液件的端部完整性起到有效且可靠的检测。在此基础上，第一传感器的结构易于实现且可靠性较高，有利于降低注液件的端部检测装置的成本从而降低电池的产线成本。
在一些可能的实施方式中，第一传感器设置于预设移动路径的下游；其中，上述利用第一传感器检测注液件的端部的移动以检测端部是否完整，包括：在注液件的端部的移动行程大于或等于预设阈值的情况下，检测注液件的端部完整；在注液件的端部的移动行程小于预设阈值的情况下，检测注液件的端部缺失。
通过该实施方式的技术方案，第一传感器能够通过检测注液件的端部的移动行程对注液件的端部完整性起到有效且可靠的检测。在此基础上，第一传感器还能够便于进一步检测注液件的端部缺失程度，从而对注液件起到更为全面的检测作用。
在一些可能的实施方式中，上述检测注液件的端部，包括：控制注液件沿预设移动路径移动，预设移动路径中设置有第二传感器，第二传感器中形成有用于通过注液件的检测通道；利用第二传感器中的检测通道检测注液件的端部是否歪斜。
通过该实施方式的技术方案，对注液件设置第二传感器，该第二传感器能够用于检测注液件的端部是否存在歪斜，降低注液件的端部出现 歪斜时对电池的注液过程造成的影响，例如，降低歪斜的注液针无法刺穿密封件的可能性。
在一些可能的实施方式中，上述利用第二传感器中的检测通道检测注液件的端部是否歪斜，包括：在注液件的端部接触检测通道的内周面的情况下，检测注液件的端部歪斜；在注液件的端部未接触检测通道的内周面的情况下，检测注液件的端部未歪斜。
通过该实施方式的技术方案，第二传感器能够通过检测注液件的端部的接触对注液件的端部歪斜起到有效且可靠的检测。在此基础上，第二传感器的结构易于实现且可靠性较高，有利于降低注液件的端部检测装置的成本从而降低电池的产线成本。
在一些可能的实施方式中，预设移动路径与注液件对电池进行注液时的注液移动路径相同。
通过该实施方式的技术方案，注液件可仅具有同一种移动路径，即可完成注液件对电池的注液以及检测装置(包括第一传感器和/或第二传感器)对该注液件的检测，注液件的控制方式较为简单且易于实现。另外，注液过程与注液件的检测过程采用同一移动路径，可以便于根据电池的不同尺寸和外形适应性的调整检测装置中传感器的位置，从而便捷的实现注液件既能对多种不同尺寸和外形的电池进行注液，也能利用检测装置对该注液件进行检测。
在一些可能的实施方式中，密封件的材料包括橡胶。
通过该实施方式的技术方案，密封件可具有较佳的密封性、较佳的弹性以及一定的硬度，该密封件在对电池的注液口起到良好密封作用的同时，还能抵御一定的外力影响，且实现在注液件抽离后的自愈合。该密封件在电池制造过程中可具有较佳的应用性能。
在一些可能的实施方式中，密封件在中部区域的厚度小于密封件在边缘区域的厚度。
通过该实施方式的技术方案，在密封件的中部区域设计厚度较小的薄弱部，可以使得注液件能够更为快速且可靠的刺穿密封件的薄弱部以进入电池的内部，从而进一步提升电池的注液效率。
在一些可能的实施方式中，密封件在中部区域的第一表面形成有第一凹槽，第一表面为密封件朝向电池的外部的表面；和/或，密封件在中部区域的第二表面形成有第二凹槽，第二表面为密封件朝向电池的内部的表面。
在该实施方式的技术方案中，可通过在密封件的至少一个表面设置凹槽在密封件中设置厚度较小的薄弱部，该技术方案易于实现且可控度较高。另外，在密封件朝向电池的外部的第一表面设置第一凹槽，该第一凹槽能够对注液件起到定位效果，注液件能够更为精准的通过该第一凹槽刺穿密封件中部的薄弱区域。
第二方面，提供一种电池的注液系统，包括：密封件安装装置，用于获取密封件并在电池的注液口设置密封件；注液件，用于刺入密封件以进入电池的内部；注液装置，连接于注液件，注液装置用于通过注液件向电池的内部注入电解液。
在一些可能的实施方式中，注液系统还包括：注液安全装置，设置于电池；注液安全装置中形成有对应于密封件的注液件通道，注液件通道用于通过注液件，以使得注液件通过注液件通道刺入密封件以进入电池的内部。
在一些可能的实施方式中，注液安全装置包括：注液安全帽，注液安全帽扣合于电池。
在一些可能的实施方式中，注液系统还包括：注液检测装置，注液检测装置用于检测注液件的端部。
在一些可能的实施方式中，注液件被配置为沿预设移动路径移动，注液检测装置包括：第一传感器，朝向注液件的端部设置且位于预设移动路径中，第一传感器用于检测注液件的端部的移动以检测端部是否完整。
在一些可能的实施方式中，注液件被配置为沿预设移动路径移动，注液检测装置包括：第二传感器，第二传感器中形成有对应于注液件的检测通道，检测通道位于预设移动路径中，且检测通道用于通过注液件以检测注液件的端部是否歪斜。
在本申请实施例提供的注液方法中，电池的注液口设置有密封件， 且利用注液件刺穿密封件以进入电池的内部，使得注液件能够在电池的内部进行注液，以降低注液过程中电解液泄露造成的电解液污染问题，提升电池在注液过程中的制造性能以及电池的使用可靠性。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1是本申请一实施例提供的一种电池的结构示意图；
图2是本申请一实施例提供的一种电池的注液方法的示意性流程框图；
图3是图2所示步骤S201对应的一种结构示意图；
图4是图2所示步骤S202对应的一种结构示意图；
图5是图4所示实施例中A部分的局部放大图；
图6是本申请一实施例提供的另一电池的注液方法的示意性流程框图；
图7是本申请一实施例提供的另一电池的注液方法的示意性流程框图；
图8是图7所示步骤S402和S403对应的一种结构示意图；
图9是图8所示电池沿B-B’方向的示意性截面图；
图10是图8和图9所示实施例中注液安全装置的一种示意性放大截面图；
图11是本申请一实施例提供的注液安全装置的另一示意性放大截面图；
图12是本申请一实施例提供的另一电池的注液方法的示意性流程框图；
图13是本申请一实施例提供的第一传感器与注液件的结构示意图；
图14是本申请一实施例提供的第二传感器与注液件的结构示意图；
图15是本申请一实施例提供的第一传感器、第二传感器与注液件的结构示意图；
图16是本申请一实施例提供的另一电池的注液方法的示意性流程框图；
图17是本申请一实施例提供的电池的注液系统的示意性结构框图。
在附图中，附图并未按照实际的比例绘制。
附图标记说明：
100-电池；110-壳体；120-电极组件，121-极耳；130-端盖组件，
1301-负极端盖，1302-正极端盖，1311-电极端子，1312-注液口；140-密封件，141-第一凹槽，142-第二凹槽；
200-注液安全装置；210-注液件通道，220-第一斜面导向槽，
230-第二斜面导向槽，240-第一容纳槽，250-第二容纳槽，260-导气槽；
300-注液件；
400-注液检测装置；410-第一传感器，420-第二传感器，421-检
测通道，430-处理模块；
500-密封件安装装置；
600-注液装置；
1-电池的注液系统。
具体实施方式
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指 示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
下述描述中出现的方位词均为图中示出的方向，并不是对本申请的具体结构进行限定。在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
本申请中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：存在A，同时存在A和B，存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本申请中在申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。本申请的说明书和权利要求书或上述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序或主次关系。
在本申请中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本申请所描述的实施例可以与其它实施例相结合。
在新能源领域中，电池作为用电装置，例如电动车辆、船舶或航天器等的主要动力源，其重要性不言而喻。在本申请中，电池可以包括锂 离子二次电池、锂离子一次电池、锂硫电池、钠锂离子电池、钠离子电池或镁离子电池等，本申请实施例对此并不限定。在一些相关技术中，该电池也可以称之为电池单体(battery cell)或电芯。在具体实现中，一个或多个电池可组成电池模块或电池包(battery pack)，以向用电装置提供更高的电压和容量。可选地，该电池包可包括用于封装一个或多个电池的箱体。箱体可以降低液体或其他异物对电池的充电或放电的影响。
在本申请中，电池可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此不做限定。另外，电池一般按封装的方式分成三种：柱形电池、方体方形电池和软包电池，本申请实施例对此也不限定。
电池技术的发展要同时考虑多方面的设计因素，例如，为了提升电池的充放电性能，需考虑电池的能量密度、循环寿命、放电容量、充放电倍率等多种类型的性能参数。除此之外，电池的制造效率以及制造性能对于电池的推广、应用以及长期发展也至关重要。
电池一般包括壳体、电极组件以及电解液，其中，壳体可用于容纳电极组件以及电解液，电极组件由正极片、负极片和隔离膜组成，电解液作为电解质可以在电极组件的正极片以及负极片之间传导离子，从而实现电池的正常工作。对于锂电池而言，其中的电解液可以包括锂盐和有机溶剂等。
在电池的制造过程中，电池的注液过程(即向电池的壳体中注入电解液的过程)也为一项十分重要的制程，该注液过程的生产制造性能会影响电池最终的产品性能。在一些相关技术中，在电池的注液过程中，利用注液工具(例如注液嘴等)设置于电池的注液口边缘，通过该注液工具向电池的注液口进行注液，在注液工具与注液口边缘接触不佳的情况下，在注液过程中可能存在漏液的风险，产生电解液污染问题，影响后续电池的制造以及电池的产品性能。
鉴于此，本申请实施例提供一种新的电池的注液方法，包括：在电池的注液口设置密封件，向密封件刺入注液件以使得该注液件穿过密封件进入电池的内部，且通过注液件向电池的内部注入电解液。在本申请实施例提供的注液方法中，电池的注液口设置有密封件，且利用注液件刺穿 密封件以进入电池的内部，使得注液件能够在电池的内部进行注液，以降低注液过程中电解液泄露造成的电解液污染问题，提升电池的注液生产性能以及电池的使用可靠性。
本申请实施例描述的技术方案均适用于各种使用电池的装置，例如，电动车辆、电瓶车、电动工具、船舶和航天器等，其中，航天器包括飞机、火箭、航天飞机和宇宙飞船等。应理解，本申请实施例描述的技术方案不仅仅局限适用于上述所描述的装置，还可以适用于所有使用电池的装置。
图1示出了本申请一实施例提供的一种电池100的结构示意图。
如图1所示，电池100包括壳体110、电极组件120和端盖组件130。壳体110和端盖组件130形成外壳或电池盒。壳体110可由金属(例如铝)形成。壳体110根据一个或多个电极组件120组合后的形状而定。例如，壳体110可以为图1所示的中空的圆柱体。
壳体110具有开口，电极组件120容纳于壳体110内，端盖组件130用于覆盖该开口，以将电极组件120容纳于壳体110内。通过壳体110和端盖组件130，实现了对电极组件120及其他部件的容纳和保护。壳体110内填充有电解质，即电解液。
在本申请实施例提供的电池100中，根据实际使用需求，电极组件120可设置为单个或多个，例如，在图1所示实施例中，电池100内设置有1个电极组件120。
继续参见图1所示，端盖组件130包括负极端盖1301和正极端盖1302，该负极端盖1301和正极端盖1302分别从壳体110的两端覆盖壳体110的开口，以将电极组件120盖合于壳体110内。负极端盖1301上设置有负电极端子，正极端盖1302上设置有正电极端子。电极组件120上设置有极耳121，其中，正电极端子与电极组件120的正极耳电连接，负电极端子与电极组件120的负极耳电连接。
除了电极端子以外，上述负极端盖1301或正极端盖1302上还设置有注液口1312，例如，在图1所示实施例中，负极端盖1301的中心部位可设置有注液口1312。在电池100的注液过程中，外部的注液工具可设置 于该注液口1312处，以向电池100注入电解液。
需要说明的是，在本申请实施例提供的电池100中，端盖组件130上除了可设置有电极端子、注液口以外，还可设置有其它电池构件，例如泄压机构等等，本申请实施例对该电池100的具体组成结构不做限定。
另外，图1中所示的电池100以圆柱形电池为例进行了说明，本申请提供的电池还可以为方形电池或者其他形状的电池，在方形电池中，其组成部分可与上文图1所示的电池100类似，该方形电池的壳体可以为中空的方形壳体。
图2示出了本申请实施例提供的一种电池的注液方法20的示意性流程框图。可选地，该注液方法20可适用于图1所示的电池100。
如图2所示，该电池的注液方法20可包括以下步骤。
S201：在电池的注液口设置密封件。
S202：向密封件刺入注液件以使得注液件穿过密封件进入电池的内部。
S203：通过注液件向电池的内部注入电解液。
具体地，本申请实施例提供的注液方法20可由电池产线中的注液设备执行，该注液设备中可包括一个或多个相关的装置或组件，以分别完成注液方法20中的多个步骤。
为了便于说明和理解，图3示出了对应于图2所示步骤S201对应的一种结构示意图。
如图3所示，在步骤S201中，电池100的注液口1312(图3中未示出)处设置有密封件140。具体地，该步骤S201可以由电池产线中的密封件安装装置执行，当电池100进入目标工位后，该密封件安装装置可获取密封件140并将其安装设置于电池100的注液口1312。
该密封件140为一种具有密封效果的结构件，其外形尺寸可以适配于电池100的注液口1312，从而对电池100的注液口1312起到良好的密封作用。另外，该密封件140可具有一定的硬度，以提升密封件140的使用性能，降低外界应力对密封件140造成的影响。
作为示例而非限定，该密封件140的材料可以包括橡胶。或者， 在其它替代实施方式中，该密封件140还可以为其它具有密封效果且具有一定硬度的材料。
在一些具体实现中，该密封件140可以为胶钉。该密封件140的外形可近似于钉状，其具有钉帽和钉身。该胶钉可易于稳定安装于电池100的注液口1312处，以对电池100起到良好的密封作用。
图4示出了对应于图2所示步骤S202对应的一种结构示意图。该图4可以为图3所示电池100沿A-A’方向的截面示意图。
如图4所示，在步骤S202中，注液件300可刺入并穿过密封件140，从而通过密封件140所在的注液口1312进入电池100的内部。
可选地，在本申请实施例中，注液件300例如可以是注液针、注液管等结构形式。对应于该注液件300，注液件通道210可以是注液针通道或者注液管通道等结构形式。
在一些具体实现中，注液件300可竖直运动，该注液件300的尖端可竖直刺入位于电池100顶端的密封件140，进而进入电池100的内部。该电池100的内部可形成有通道，以便于注液件300进入，且注液件300不会对电池100内部的电极组件造成损伤。
在步骤S203中，电池产线可配置有注液装置，该注液装置可通过注液件300向电池100的内部注入电解液。可选地，该注液装置可理解为电解液提供装置，其连接于注液件300，注液件300中形成有注液通道，注液装置中的电解液通过注液件300中的注液通道流入电池100的内部。可选地，注液装置与注液件300之间的连接处可设置有开关，在控制该开关打开的时候，注液装置与注液件300中的注液通道相互连通，在控制该开关关闭的时候，注液装置与注液件300中的注液通道相互关断。
在本申请实施例提供的注液方法中，电池100的注液口1312设置有密封件140，且利用注液件300刺穿密封件140以进入电池100的内部，使得注液件300能够在电池100的内部进行注液，以降低注液过程中电解液泄露造成的电解液污染问题，提升电池100在注液过程中的制造性能以及电池100的使用可靠性。
图5示出了图4所示实施例中A部分的局部放大图。
如图5所示，在一些实施方式中，密封件140在中部区域的厚度可小于该密封件140在边缘区域的厚度。
具体地，在该实施方式中，密封件140并非厚度统一的结构件，其中具有厚度较小的薄弱部，该薄弱部易于被外部注液件300刺穿，从而使得注液件300能够快速进入电池100的内部。可选地，该薄弱部可位于密封件140的中部区域，具体地，该薄弱部可位于密封件140在第一方向上的中部区域，该第一方向为注液口1312的径向方向。
在密封件140为钉状结构的情况下，该密封件140的钉身在中部区域的厚度可小于该钉身在边缘区域的厚度。
通过该实施方式的技术方案，在密封件140的中部区域设计厚度较小的薄弱部，可以使得注液件300能够更为快速且可靠的刺穿密封件140的薄弱部以进入电池100的内部，从而进一步提升电池100的注液效率。
继续参见图5所示，可选地，密封件140在中部区域的第一表面形成有第一凹槽141，该第一表面为密封件140朝向电池100的外部的表面；和/或，密封件140在中部区域的第二表面形成有第二凹槽142，第二表面为密封件140朝向电池100的内部的表面。
可选地，上述第一凹槽141和第二凹槽142可以为弧形凹槽，以降低注液件300在该凹槽处发生卡针的概率。
在该实施方式的技术方案中，可通过在密封件140的至少一个表面设置凹槽在密封件140中设置厚度较小的薄弱部，该技术方案易于实现且可控度较高。另外，在密封件140朝向电池100的外部的第一表面设置第一凹槽141，该第一凹槽141能够对注液件300起到定位效果，注液件300能够更为精准的通过该第一凹槽141刺穿密封件140中部的薄弱区域。
图6示出了本申请实施例提供的另一电池的注液方法30的示意性流程框图。可选地，该注液方法30同样可适用于上文实施例所示的电池100。
如图6所示，该电池的注液方法30可包括以下步骤。
S301：在电池的注液口设置密封件。
S302：向密封件刺入注液件以使得注液件穿过密封件进入电池的 内部。
S303：通过注液件排放电池的内部气体。
S304：通过注液件向电池的内部注入电解液。
具体地，在本申请实施例中，步骤S301、S302以及S304可以参见上文图2所示实施例的相关描述，此处不做过多赘述。
在步骤S303中，在注液装置通过注液件300向电池100的内部注入电解液之前，电池100的内部气体还可以通过注液件300向电池100的外部排放。具体地，注液件300中可形成一个通道，该通道既可为排气通道也可为注液通道，电池100的内部气体可先通过该通道进行排气后，电解液再通过该通道进入电池100的内部。
可选地，该电池100的内部气体可以为电池100的前序加工过程中产生的气体，该气体会占用电池100的内部空间，影响电池100中的有效容纳空间，例如影响电池100中用于容纳电解液的空间，从而影响电池100的能量密度以及产品性能等等。
鉴于此，通过本申请实施例的技术方案，在向电池100的密封件140刺入注液件300后，可首先利用该注液件300排放电池100内部的气体，然后再通过该注液件300向电池100的内部注入电解液，该排放的内部气体不会占用电池100内部的容纳空间，有利于提升电池100的能量密度以及产品性能。
可选地，在一些实施方式中，上述步骤S303可以包括：通过注液件抽取电池的内部气体，以使得电池的内部形成负压。
具体地，在该实施方式中，电池产线中还可配置抽气装置，该抽气装置可连接于注液件300，并通过注液件300抽取电池100的内部气体。相比于自然状态下，电池100的内部气体通过注液件300向外部排放的过程，通过抽气装置抽取电池100的内部气体，可以提升该电池100的内部气体的排放速率，从而提升电池100的制造加工效率。
另外，可通过抽取电池100的内部气体使得电池100的内部形成负压，即电池100的内部气压低于大气压(也称常压)。在电池100的内部形成负压的情况下，处于常压环境中的电解液可快速通过注液件300注 入至电池100的内部，不仅有利于提高注液速率以提高电池100的制造加工效率，还可以降低注液过程中，电解液泄露或飞溅等问题发生的可能性，从而进一步提升电池100在注液过程中的制造性能。
可选地，在一些可能的实施方式中，上述电池100的内部气体可以包括：电池100在执行闭口化成过程中产生的气体。
具体地，在该实施方式中，在步骤S301之后，电池100的内部处于密封状态。该电池100可进入化成工位，并在该化成工位执行闭口化成过程。在闭口化成过程中，可对该电池100进行充放电处理，以激活电池100内部的活性物质，使得电池100实现活化以便于电池100后续的正常充放电操作。
在闭口化成过程中，电池100的内部发生的化学反应会产生一定的反应气体，该反应气体会较大程度的影响电池100的内部容纳空间，也会造成电池100的内部气压较大，增加电池100发生爆炸的可能性。
鉴于此，在本申请实施例中，可通过注液件300先抽取电池100在闭口化成过程中产生的反应气体，再通过注液件300向电池100注入电解液，一方面可以增加电池100中注入的电解液的容量，提升电池100的整体性能，另一方面可以减少电池100中的气体以降低电池100的内部气压，降低电池100发生爆炸的可能性。
需要说明的是，在本申请实施例中，电池100在执行闭口化成的过程中，电池100的内部可提前注入有部分电解液，在电池100执行完成闭口化成，且抽取电池100的内部气体之后，可再向电池100的内部注入剩余电解液。
可选地，在图6所示实施例中，在步骤S303之前，在注液件300刺入密封件140之后，注液装置可先通过注液件300向电池100的内部注入一部分电解液，然后，注液件300抽离密封件140，电池100进入闭口化成工位以执行闭口化成，注液件300重新刺入密封件140，在步骤S303中，抽气装置可通过注液件300抽取电池100的内部气体，该内部气体包括电池100在闭口化成过程中产生的反应气体。在步骤S304中，注液装置可通过注液件300向电池100的内部注入另一部分电解液，以完成电池100的 注液过程。
在一些实施方式中，上述密封件140可以为弹性材料，在上述图2中的步骤S203或者图6中的步骤S304之后，注液方法20或者注液方法30还可包括：将注液件抽离密封件，其中，在注液件抽离后，密封件弹性形变以减小注液件在密封件中形成的缺口。
具体地，在该实施方式中，密封件140为能够发生弹性形变的弹性材料，其能够被注液件300刺穿，且能够在注液件300抽离后，自动发生弹性形变以“愈合”被注液件300刺穿形成的缺口。
如上文实施例所述，该密封件140的材料可以包括橡胶，其具有较佳的弹性形变性能。
在注液件300抽离密封件140之后，密封件140弹性形变可以使得密封件140中的缺口非常小乃至可以忽略不计，该十分微小的缺口基本不会影响电池100的密封性，因而，该密封件140除了可以提升电池100在注液过程中的制造性能以外，还可以复用作为电池100在正常使用过程中的密封件以密封电池100的注液口1312。通过该实施方式的技术方案，有利于综合提升电池100在注液过程中的制造性能以及使用性能。
图7示出了本申请实施例提供的另一电池的注液方法40的示意性流程框图。可选地，该注液方法40同样可适用于上文实施例所示的电池100。
如图7所示，该电池的注液方法40可包括以下步骤。
S401：在电池的注液口设置密封件。
S402：在电池上设置注液安全装置，该注液安全装置中形成有对应于密封件的注液件通道。
S403：向注液件通道刺入注液件，以使得该注液件通过注液件通道刺入密封件以进入电池的内部。
S404：通过注液件排放电池的内部气体。
S405：通过注液件向电池的内部注入电解液。
具体地，在本申请实施例中，步骤S401、S404以及S405可以参见上文图6所示实施例的相关描述，此处不做过多赘述。步骤S402和S403 可以为上文图6所示步骤S302的一种实现方式。
为了便于说明和理解，图8和图9示出了对应于图7所示步骤S402和S403对应的一种结构示意图。其中，图9为图8所示电池100沿B-B’方向的示意性截面图。
如图8和图9所示，电池100上设置有注液安全装置200，该注液安全装置200中形成有对应于电池100上密封件140的注液件通道210。注液件300可穿过该注液安全装置200中的注液件通道210刺入密封件140，并进入电池100的内部。
在步骤S402中，电池产线可配置有注液安全装置的控制设备，该控制设备可控制将注液安全装置200设置于电池100的注液口1312的所在壁，在注液安全装置200设置于电池100后，该注液安全装置200中的注液件通道210可对应于注液口1312处的密封件140。在一些具体实现中，密封件140可设置于注液件通道210的通道口。
在步骤S403中，注液件300可在竖直方向上运动进入注液件通道210，进而抵达位于注液件通道210的通道口的密封件140，在注液件300刺穿密封件140后，可进入电池100的内部，以实现后续对电池100内部气体的排放以及向电池100内部注入电解液。
通过本申请实施例的技术方案，电池100配置有注液安全装置200。在电池100的注液过程中，注液件300并非直接刺向电池100，而是先经过注液安全装置200中的注液件通道210再刺入与注液件通道210对应的密封件140。相比于直接利用注液件300刺入密封件140，有可能造成注液件300刺偏影响电池100中其它部件(例如电极端子等)的性能，本申请实施例提供的技术方案中，利用注液安全装置200对电池100进行了防护，且注液件300能够较为准确的通过注液件通道210刺入密封件140，降低了注液件300刺偏对电池100造成影响的可能性，从而提升了电池100在注液过程中的制造性能以及电池100的使用可靠性。
在一些可能的实施方式中，参见图8和图9所示，上述注液安全装置200可包括注液安全帽，上述步骤S402可以包括：将注液安全帽扣合于电池。
具体地，在该实施方式中，注液安全帽可包括盖体和环形壁，其中，盖体对应于电池100中注液口1312的所在壁设置，环形壁连接于盖体朝向电池100的一侧，在注液安全帽扣合于电池100后，该环形壁可环绕于电池100设置。
注液件通道210形成于注液安全帽的盖体中，且该注液件通道210贯穿注液安全帽的盖体。该注液件通道210的轴向可垂直于电池100中注液口1312的所在壁，从而便于注液件300能够垂直刺入位于注液口1312处的密封件140，准确的进入电池100的内部进行排气和注液。
在一些实施方式中，如图8和图9所示，在注液口1312(图8和图9中未示出)形成于其所在壁的中心时，位于注液口1312处的密封件140同样设置于该壁的中心，则注液件通道210也可以对应形成于注液安全帽的盖体的中心。
通过该实施方式的技术方案，将注液安全装置200设计为注液安全帽，有利于该注液安全帽较为便捷且可靠的固定设置于电池100，注液安全帽与电池100之间的位置关系相对固定，从而使得注液件300能够较为精准的通过注液安全帽刺入电池100的内部，有利于进一步提升电池100在注液过程中的制造性能。
在一些替代实施方式中，注液安全装置200除了可设计为注液安全帽以外，还可以设计为其它形态，例如板状结构等等，本申请实施例对此不做具体限定。
图10示出了图8和图9所示实施例中注液安全装置200的一种示意性放大截面图。
如图10所示，在一些实施方式中，注液件通道210远离于电池100的一端形成有第一斜面导向槽220，该第一斜面导向槽220的斜面相对于注液件通道210的轴向倾斜设置，该第一斜面导向槽220用于引导注液件300进入注液件通道210。
具体地，在该实施方式中，注液件通道210远离于电池100的一端可以为注液件通道210的入口端，即注液件300从该注液件通道210的入口端进入。在该注液件通道210的入口端设置第一斜面导向槽220，可 以扩大注液件通道210在入口端的直径，有利于注液件300更为便捷且顺滑的进入注液件通道210，降低该注液件300在注液件通道210的入口端发生卡针的概率，从而进一步提升电池100在注液过程中的制造性能。
可选地，作为示例而非限定，上述第一斜面导向槽220可以包括锥面导向槽。该第一斜面导向槽220具体例如可以为圆台结构，其侧面为锥面。该第一斜面导向槽220的上底为远离于电池100的一面，第一斜面导向槽220的下底为朝向电池100的一面，该第一斜面导向槽220的上底面积可大于下底面积。
通过该实施例的技术方案，将第一斜面导向槽220设计为锥面导向槽，可以使得该第一斜面导向槽220具有光滑的表面，从而便于对注液件300起到良好的引导作用，进一步降低注液件300在注液件通道210处发生卡针的概率，提升电池100在注液过程中的制造性能。
在一些替代实施方式中，第一斜面导向槽220除了可设计为具有锥面的圆台结构以外，还可以为锥台等其它类型的结构，本申请实施例对此不做具体限定。
继续参见图10所示，在注液安全装置200为注液安全帽的情况下，该注液安全帽扣合于电池100的一端可设置有第二斜面导向槽230，该第二斜面导向槽230的斜面相对于电池100的壁倾斜，该第二斜面导向槽230用于引导电池100扣合于注液安全帽。
具体地，在该实施方式中，注液安全帽扣合于电池100的一端可以为注液安全帽中环形壁所在的一端，该环形壁的内周面可设置有第二斜面导向槽230。该第二斜面导向槽230可以扩大注液安全帽的内径，从而允许电池100具有较大的位移裕量，即使电池100相对于注液安全帽并非完全位置对应，而具有一定的位置偏移，该注液安全帽也能通过该第二斜面导向槽230顺滑的扣合于电池100，从而进一步提升电池100在注液过程中的生产效率。
可选地，作为示例而非限定，上述第二斜面导向槽230也可以包括锥面导向槽。该第二斜面导向槽230具体例如可以为圆台结构，其侧面为锥面。另外，该第二斜面导向槽230的上底为朝向注液件通道210的一 面，该第二斜面导向槽230的下底为远离注液件通道210的一面，该第二斜面导向槽230的上底面积可小于下底面积。
通过该实施例的技术方案，将第二斜面导向槽230设计为锥面导向槽，可以使得该第二斜面导向槽230具有光滑的表面，从而便于对电池100起到良好的引导作用，使得电池100能够稳定可靠与注液安全帽相互扣合，进一步提升电池100在注液过程中的制造性能。
继续参见图10所示，注液安全装置200中还设置有第一容纳槽240，该第一容纳槽240用于容纳电池100的电极端子1311。
具体地，电池100中注液口1312所在壁上还设置有电池100的电极端子1311，在注液安全装置200对应设置于电池100中注液口1312所在壁的情况下，该注液安全装置200朝向该壁的表面形成有第一容纳槽240，从而便于容纳电池100的电极端子1311，且使得注液安全装置200与电池100能够准确对位，提升注液安全装置200中注液件通道210与注液口1312处的密封件140的对应性，以进一步提升电池100在注液过程中的制造性能。
可选地，该第一容纳槽240的形状匹配于电极端子1311的形状。
作为示例，在电极端子1311为环形凸起电极端子的情况下，该第一容纳槽240可以为环形容纳槽。
在第一容纳槽240与电极端子1311相互匹配的情况下，二者之间的对位精度较高，且能够实现紧密配合，提升注液安全装置200与电池100之间的连接稳定性。与此同时，第一容纳槽240与电极端子1311之间的间隙较小，第一容纳槽240能够对电极端子1311起到良好的保护作用，从而降低注液过程中外部环境对电极端子1311的干扰和影响。
除了上述第一容纳槽240以外，在图10所示实施例中，注液安全装置200中还设置有第二容纳槽250，该第二容纳槽250可用于容纳密封件140。
具体地，该第二容纳槽250设置于注液件通道210的出口端，从而容纳对应于该注液件通道210的密封件140。该第二容纳槽250的形状也可以匹配于密封件140进行设计，从而对密封件140起到良好的保护作用， 降低注液过程中外部环境对密封件140的干扰和影响。
图11示出了本申请实施例提供的注液安全装置200的另一示意性放大截面图。
如图11所示，在一些实施方式中，注液安全装置200中还设置有导气槽260，该导气槽260连通于注液安全装置200中附接于电池100的第一表面以及注液安全装置200中朝向外部环境的表面。
具体地，在注液安全装置200对应设置于电池100的情况下，例如，在注液安全装置200为注液安全帽，该注液安全帽扣合于电池100的情况下，注液安全装置200中朝向电池100的表面中的大部分区域可附接于电池100的壁，以使得注液安全装置200与电池100之间具有较高的配合度以及稳定连接。
在注液安全装置200中的第一表面附接于电池100的情况下，该第一表面与电池100之间的间隙较小，因而二者之间易形成较小的压强乃至形成负压，在注液完成后将注液安全装置200脱离于电池100的过程中，二者之间较小的压强乃至负压会使得注液安全装置200不易脱离于电池100，从而影响电池100的生产效率。
鉴于此，在本申请实施例中，注液安全装置200中设置有导气槽260，该导气槽260连通于注液安全装置200中附接于电池100的第一表面以及注液安全装置200中朝向外部环境的表面，该导气槽260可将外部环境中的大气气体导入至注液安全装置200的第一表面与电池100之间的间隙中，提高注液安全装置200与电池100之间的压强，便于该注液安全装置200脱离于电池100，进而提升电池100的生产效率。
在一些可能的实施方式中，上述导气槽260连通于注液安全装置200中附接于电池100的第一表面以及该注液安全装置200中与第一表面相对的第二表面。
具体地，在该实施方式中，与第一表面相对的第二表面为注液安全装置200远离电池100的表面，该第二表面为注液安全装置200中朝向外部环境的其中一个表面。
在该实施方式下，导气槽260可以为贯穿注液安全装置200的直 线型导气通道。该导气通道的径向尺寸可设计的较小，例如，该导气通道的径向尺寸可以小于注液件通道210的径向尺寸。在导气通道的径向尺寸设计的较小的情况下，可以降低外部环境中的干扰物通过该导气通道接触到电池100的可能性，从而降低外部环境对电池100造成的干扰和影响。
通过该实施方式的技术方案，将导气槽260设计为连通相对的第一表面和第二表面，可以便于该导气槽260在注液安全装置200中的制造，降低注液安全装置200的整体制造成本。
在一些替代实施方式中，导气槽260也可以设计为曲线型或者弯折直线型的导气通道，本申请实施例对该导气槽260的形态设计不做限定。
另外，该导气槽260除了可以连通于注液安全装置200中的第一表面以及朝向外部环境的表面以外，还可以连通于第一表面以及注液件通道210。具体地，在注液件300抽离于注液件通道210之后，该注液件通道210也可以连通于大气环境，在导气槽260连通于第一表面以及注液件通道210的情况下，该导气槽260也能将大气气体导向至第一表面。
在一些可能的实施方式中，如图11所示，上述导气槽260的数量可以为多个，该多个导气槽260可分别设置于注液件通道210的两侧，从而进一步降低注液安全装置200与电池100之间形成较低压强乃至负压的可能性。
可选地，继续参见图11所示，注液件通道210的长度L1与注液件300中目标段的长度L2可满足：L1≥2×L2，其中，该目标段位于注液件300朝向电池100内部的一端且位于注液件通道210以外。在注液件300包括注液针的情况下，该目标段位于的注液针的针头端。
可选地，在注液件通道210的入口端设置有第一斜面导向槽220的情况下，该注液件通道210的长度L1可包括该第一斜面导向槽220的深度。
具体地，在该实施方式中，注液件300在注液件通道210内的长度即为该注液件通道210的长度L1，该注液件300在该注液件通道210内的部分段可以被注液件通道210进行约束，以控制该注液件300的歪斜度。
注液件300的端部会穿过注液件通道210从而进入电池100的内 部，因而该注液件300的端部中的部分段(即目标段)会位于注液件通道210以外，该目标段中的至少部分位于电池100的内部。在电池100的注液口1312设置有密封件140的情况下，该目标段中的至少部分位于密封件140中。
在注液件通道210的长度L1较大，且注液件300在注液件通道210以外的目标段的长度L2较小的情况下，例如，L1≥2×L2的情况下，该注液件通道210能够对注液件300起到较好的约束作用，减小注液件300整体的歪斜度，使得注液件300能够以较佳的角度进入电池100的注液口1312以降低注液件300对注液口1312的处结构件造成干扰和影响。另外，在电池100的注液口1312设置有密封件140的情况下，注液件300能够以较佳的角度刺入该密封件140，从而使得注液件300能够有效且快速的穿过密封件140以进入电池100的内部。
可选地，继续参见图11所示，注液件300的直径D1与注液件通道210的直径D2满足：0＜(D2-D1)/D1≤0.15。
具体地，在该实施方式中，注液件通道210的直径D2会大于注液件300的直径D1，即D2-D1＞0，以使得注液件300能够顺滑的通过注液件通道210。
进一步地，注液件通道210的直径D2与注液件300的直径D1之差(D2-D1)还满足(D2-D1)/D1≤0.15，在该情况下，注液件通道210的直径D2与注液件300的直径D1之差可较小，从而使得注液件通道210对注液件300起到良好的约束作用，歪斜度较大的注液件300无法通过该注液件通道210进入至电池100的内部。通过该实施方式的技术方案，能够减小注液件300整体的歪斜度，使得注液件300能够以较佳的角度进入电池100的注液口1312以降低注液件300对注液口1312的处结构件造成干扰和影响。
在一些可能的实施方式中，上述注液安全装置200的材料可包括高分子聚合物。作为示例，该高分子聚合物包括但不限于聚醚醚酮(poly-ether-ether-ketone，PEEK)等等。
具体地，为了使得电池100具有较佳的使用稳定性和可靠性，该 电池100的壳体一般采用金属材料制备形成，为了降低注液安全装置200与电池100相互接触时对电池100造成磨损和影响，注液安全装置200的材料可采用非金属的高分子聚合物。该高分子聚合物可具有较佳的耐磨性、较高的强度和较高的耐腐蚀性，从而可稳定且可靠的应用于电池100的注液过程中，在对电池100起到安全防护的作用的同时，对电池100造成的影响较小。
图12示出了本申请实施例提供的另一电池的注液方法50的示意性流程框图。可选地，该注液方法50同样可适用于上文实施例所示的电池100。
如图12所示，该电池的注液方法50可包括以下步骤。
S501：在电池的注液口设置密封件。
S502：向密封件刺入注液件以使得注液件穿过密封件进入电池的内部。
S503：通过注液件向电池的内部注入电解液。
S504：将注液件抽离密封件。
S505：检测注液件的端部。
具体地，在本申请实施例中，步骤S501至S504的相关技术方案可以参见上文实施例的相关描述，此处不做过多赘述。
在一些可能的实施方式中，步骤S505可执行于步骤S504之后，即在利用注液件对电池进行注液，且将注液件抽离密封件之后，再对注液件的端部进行检测，以便于使得后续电池的注液过程能够可靠顺利执行。
或者，在另一些可能的实施方式中，步骤S505也可以执行于步骤S502之前，即在向密封件刺入注液件之前，即对该注液件的端部进行检测，以便于使得当前电池的注液过程能够可靠顺利执行。
又或者，步骤S505既可执行于步骤S502之前，也可再次执行于步骤S504之后。
可以理解的是，在注液件包括注液针的情况下，步骤S505中对注液件中端部的检测即为对注液针的针头的检测。
通过本申请实施例的技术方案，在对电池进行注液的过程中，不 仅利用注液件刺入电池的密封件以进行注液，还检测该注液件的端部，在注液件的端部出现问题的时候，能够及时对该注液件进行更换，使得电池产线中多个电池的注液过程能够可靠执行，提升电池产线中多个电池在注液过程中的制造性能。
可选地，在一些实施方式中，上述步骤S505可以包括：控制注液件沿预设移动路径移动，该预设移动路径中设置有第一传感器；利用第一传感器检测注液件的端部的移动以检测该注液件的端部是否完整。在注液件包括注液针的情况下，利用第一传感器可检测注液针的针头的移动以检测该注液件的针头是否完整。
为了便于说明和理解，图13示出了该实施方式下，第一传感器410与注液件300的结构示意图。
如图13所示，在本申请实施例中，可针对注液件300配置第一传感器410，该第一传感器410可设置于针对注液件300的端部预先设计的预设移动路径P中，该第一传感器410可用于检测注液件300的端部的完整性。
在一些具体实现中，该第一传感器410可对应设置于注液件300的下方，注液件300在竖直方向上沿预设移动路径P朝向第一传感器410移动。
可选地，该预设移动路径P可位于注液件300的轴向方向，换言之，注液件300可沿其轴向的预设移动路径P移动。
可选地，在一些实施方式中，第一传感器410能够设置于预设移动路径P的端点，该第一传感器410可用于检测注液件300的端部是否与其接触，从而检测注液件300的端部是否完整。
或者，在另一些实施方式中，第一传感器410能够设置于预设移动路径P的下游，注液件300在预设移动路径P中移动时，能够带动第一传感器410移动，该第一传感器410能够检测注液件300的端部的移动行程，从而检测注液件300的端部是否完整。
通过本申请实施例的技术方案，对注液件300设置第一传感器410，该第一传感器410能够用于检测注液件300的端部完整性，降低注液 件300的端部出现缺失时对电池100的注液过程造成的影响，例如，降低注液针的针头无法刺穿密封件140的可能性，和/或，降低缺失的注液件300掉落金属颗粒物对电池100造成的影响。
具体地，第一传感器410设置于预设移动路径P的端点，在注液件300的端部接触第一传感器410的情况下，检测注液件300的端部完整；在注液件300的端部未接触第一传感器410的情况下，检测注液件300的端部缺失。
在该实施方式中，预设移动路径P的长度可根据实际需求进行设计，第一传感器410可设置于预设移动路径P的终点，注液件300的初始位置可设置于预设移动路径P的起点。当注液件300的端部移动该预设移动路径P的长度，且注液件300的端部完整的情况下，其可刚好接触于第一传感器410，使得该第一传感器410能够检测到注液件300的端部的接触信号，以检测注液件300的端部完整。反之，在注液件300的端部存在缺失的情况下，注液件300的端部即使移动了预设移动路径P的长度，该注液件300的端部也无法接触到第一传感器410，该第一传感器410无法检测到注液件300的端部的接触信号，从而检测注液件300的端部存在缺失的情况。
通过该实施方式的技术方案，第一传感器410能够通过检测注液件300的端部的接触对注液件300的端部完整性起到有效且可靠的检测。在此基础上，第一传感器410的结构易于实现且可靠性较高，有利于降低注液件300的端部检测装置的成本从而降低电池100的产线成本。
或者，第一传感器410也可设置于预设移动路径P的下游，在注液件300的端部的移动行程大于或等于预设阈值的情况下，检测注液件300的端部完整；在注液件300的端部的移动行程小于预设阈值的情况下，检测注液件300的端部缺失。
在该实施方式中，第一传感器410并非出于固定状态，其可在注液件300的作用下发生位移。作为示例，该第一传感器410可通过弹性件设置于固定平台上，该弹性件能够沿预设移动路径P的方向弹性形变。在注液件300的端部接触于第一传感器410时，该注液件300的端部并未到 达预设移动路径P的终点，该注液件300还可以继续沿预设移动路径P移动，此时，注液件300可带动第一传感器410一起在预设移动路径P中移动。
第一传感器410可检测注液件300在接触该第一传感器410后的移动行程，在注液件300的端部为完整端部时，第一传感器410能够检测到的注液件300的端部的移动行程较大，在注液件300的端部存在缺失时，该第一传感器410能够检测到的注液件300的端部的移动行程较小。在实际应用过程中，第一传感器410可通过判断注液件300的端部的移动行程是否大于一定的预设阈值从而判断注液件300的端部是否完整。具体地，该预设阈值可根据预设移动路径P的长度以及第一传感器410在预设移动路径P中的具体位置进行设计，本申请实施例对该预设阈值不做具体限定。
可选地，在该实施方式中，第一传感器410不仅能够检测注液件300的端部完整性，还能进一步根据注液件300的端部的移动行程检测该注液件300的端部缺失程度。例如，在注液件300的端部完整的情况下，第一传感器410检测得到的注液件300的端部的移动行程等于预设阈值，在注液件300的端部存在缺失的情况下，注液件300的端部缺失长度即为预设阈值与实际检测得到的移动行程之差。
通过该实施方式的技术方案，第一传感器410能够通过检测注液件300的端部的移动行程对注液件300的端部完整性起到有效且可靠的检测。在此基础上，第一传感器410还能进一步检测注液件300的端部缺失程度，从而对注液件300起到更为全面的检测作用。
除了上述利用第一传感器410检测注液件300的完整性以外，可选地，还可以利用其它传感器检测注液件300的其它特性，例如检测注液件300的歪斜性。
在一些实施方式中，上述图12所示实施例中步骤S505可以包括：控制注液件沿预设移动路径移动，预设移动路径中设置有第二传感器，第二传感器中形成有用于通过所述注液件的检测通道；利用第二传感器中的检测通道检测注液件的端部是否歪斜。在注液件包括注液针的情况下，可利用第二传感器中的检测通道检测注液件的针头是否歪斜。
为了便于说明和理解，图14示出了该实施方式下，第二传感器420与注液件300的结构示意图。
如图14所示，在本申请实施例中，可针对注液件300配置第二传感器420，该第二传感器420可设置于针对注液件300的端部预先设计的预设移动路径P中，该预设移动路径P可位于注液件300的轴向方向。
具体地，第二传感器420中形成有检测通道421，预设移动路径P可经过该检测通道421，当注液件300的端部沿预设移动路径P经过第二传感器420中的检测通道421时，该第二传感器420能够检测注液件300的端部是否歪斜。
在一些实施方式中，第二传感器420中的检测通道421可与注液件300同轴设置。预设移动路径P可与该检测通道421和注液件300的中心轴线位于同一直线。
通过本申请实施例的技术方案，对注液件300设置第二传感器420，该第二传感器420能够用于检测注液件300的端部是否存在歪斜，降低注液件300的端部出现歪斜时对电池100的注液过程造成的影响，例如，降低歪斜的注液针无法刺穿密封件140的可能性，和/或，降低歪斜的注液件300出现刺偏，从而刺入至电池100除注液口1312以外的其它部位的可能性，从而提升电池100在注液过程中的制造性能以及电池100的使用可靠性。
可选地，在一些实施方式中，在注液件300的端部接触第二传感器420中的检测通道421的内周面的情况下，可检测该注液件300的端部歪斜；在注液件300的端部未接触检测通道421的内周面的情况下，可检测该注液件300的端部未歪斜。
具体地，在该实施方式中，第二传感器420可以为接触式传感器。该第二传感器420中的检测通道421与注液件300同轴设置。在具体实现中，可根据实际注液过程中注液件300的歪斜度要求设计第二传感器420中的检测通道421的尺寸，在注液件300的端部歪斜度较高的情况下，在注液件300的端部经过检测通道421时，该端部会接触该检测通道421的内周面，从而使得第二传感器420能够检测到端部的接触信号，进而判断 端部出现歪斜。反之，在注液件300的端部歪斜度较小或者未发生歪斜的情况下，该注液件300的端部可顺利通过检测通道421，而不会与检测通道421的内周面发生接触，第二传感器420无法检测到端部的接触信号，进而判断端部未出现歪斜。
可选地，上述注液件300的端部歪斜可以为注液件300的端部相对于注液件300的轴向发生的歪斜。例如，在注液件300包括注液针的情况下，注液针的针头歪斜可以为注液针的针头相对于注液针的轴向发生的歪斜。
通过该实施方式的技术方案，第二传感器420能够通过检测注液件300的端部的接触对注液件300的端部歪斜起到有效且可靠的检测。在此基础上，第二传感器420的结构易于实现且可靠性较高，有利于降低注液件300的端部检测装置的成本从而降低电池100的产线成本。
图15示出了本申请实施例提供的一种第一传感器410、第二传感器420与注液件300的结构示意图。
如图15所示，在本申请实施例中，电池产线可同时配置有第一传感器410和第二传感器420，第一传感器410和第二传感器420均设置于针对注液件300的端部预先设计的预设移动路径P中。且在该预设移动路径P中，第二传感器420设置于第一传感器410的上游，注液件300可通过第二传感器420中的检测通道421后向第一传感器410移动。
具体地，在该实施例中，第二传感器420设置于第一传感器410的上游，其中的检测通道421在检测注液件300的端部歪斜性的同时，不会影响注液件300在预设移动路径P中的移动，该注液件300能够在经过第二传感器420中的检测通道421之后到达第一传感器410，以使得第一传感器410检测注液件300的端部完整性。
可选地，第二传感器420与第一传感器410之间可具有一定的间隙，以降低第一传感器410和第二传感器420之间可能造成的相互干扰。
可选地，第二传感器420与第一传感器410可通过同一固定装置进行固定，以使得该第二传感器420与第一传感器410之间的相对位置关系固定，该两个传感器不仅能够对注液件300进行较为准确的检测，且也 能同时在电池产线中移动，便于多次重复对注液件300进行检测，提升电池注液效率。
通过本申请实施例的技术方案，对注液件300同时设置有第一传感器410和第二传感器420，该第一传感器410能够用于检测注液件300的端部是否完整，该第二传感器420能够用于检测注液件300的端部是否存在歪斜，从而提升对注液件300检测的全面性，较大程度的降低注液件300的端部出现异常情况时对电池100的注液过程造成的影响，提升电池100在注液过程中的制造性能。
进一步地，第二传感器420设置于第一传感器410的上游，二者之间的相对位置关系设计的较为紧凑和合理，在能够对注液件300同时提供完整性和歪斜性检测的同时，该两个传感器不需占用较多的设备空间。
作为一种示例，如图15所示，第一传感器410可设置于容纳腔的内部，第二传感器420可盖合于该容纳腔。利用该容纳腔，可以使得第一传感器410和第二传感器420结构紧凑且较为稳定的设置在一起，且第二传感器420位于第一传感器410的上游。
在其它替代示例中，第一传感器410和第二传感器420还可以通过其它固定方式组装在一起，以使得二者之间的相对位置关系固定。本申请实施例对此不做具体限定。
继续参见图15所示，在本申请实施例中，第一传感器410和第二传感器420还可以通过信号线等电连接件连接于处理模块430，该处理模块430用于接收第一传感器410和第二传感器420的检测信号，和/或，控制第一传感器410和第二传感器420执行检测。
具体地，该处理模块430可以为具有数据处理功能和/或控制功能的电气模块，例如控制器或处理器等等。第一传感器410和第二传感器420将检测得到的用于表征注液件300的完整性和歪斜性的检测信号传输至处理模块430，该处理模块430可根据该检测信号控制注液件300是否继续执行后续注液过程。
另外，该处理模块430还可以控制第一传感器410和第二传感器420是否开始对注液件300执行检测。作为示例，该处理模块430可同时控 制注液件300开始沿预设移动路径P移动，且控制第一传感器410和第二传感器420开始检测，以提升对注液件300检测的有效性。在该实施方式中，第一传感器410和第二传感器420不必处于实施工作状态，有利于降低注液件300检测过程中所需的电力功耗。
在上文各实施例的一些实施方式中，注液件300的预设移动路径P与注液件300对电池100进行注液时的注液移动路径相同。
具体地，在电池产线中，电池100与用于执行注液件检测的检测装置可处于移动状态，电池100与该检测装置可根据实际需求分时移动至与注液件300相对应的位置，以使得注液件300对电池100进行注液或者检测装置对注液件300进行检测。其中，用于执行注液件检测的检测装置即包括上文实施例中的第一传感器410和/或第二传感器420。
在注液件300对电池100进行注液时，可将电池100移动至与注液件300相互对应的目标位置，例如可将电池100移动至注液件300的正下方。注液件300沿预设移动路径P移动后，该注液件300可刺穿电池100中的密封件140以进入电池100的内部，注液装置可通过注液件300向电池100的内部注入电解液。
在注液件300对电池100进行注液之前或者之后，可将检测装置移动至目标位置，该目标位置与上述电池100在执行注液过程中所处的位置相同。注液件300再次沿预设移动路径P移动，以使得检测装置中的第一传感器410对注液件300执行端部完整性检测，且使得检测装置中的第二传感器420对注液件300执行端部歪斜性检测。
通过本申请实施例的技术方案，注液件300可仅具有同一种移动路径，即可完成注液件300对电池100的注液以及检测装置对该注液件300的检测，注液件300的控制方式较为简单且易于实现。另外，注液过程与注液件300的检测过程采用同一移动路径，可以便于根据电池100的不同尺寸和外形适应性的调整检测装置中传感器的位置，从而便捷的实现注液件300既能对多种不同尺寸和外形的电池100进行注液，也能利用检测装置对该注液件300进行检测。
可选地，在上文各申请实施例的一些实施方式中，第一传感器 410被配置为能够沿预设移动路径P的延伸方向移动。
具体地，在该实施方式中，在注液件300处于静止状态(或者初始状态)下，第一传感器410与注液件300之间的距离可调。
作为示例，在第一传感器410设置于容纳腔的情况下，该第一传感器410在容纳腔中并非固定设置，第一传感器410朝向容纳腔底部的一端与该容纳腔的底部之间可具有调整模块。通过调整该调整模块的高度，可以调整第一传感器410与注液件300之间的距离，且实现第一传感器410在传感容纳腔中沿预设移动路径P的延伸方向移动。
通过该实施方式的技术方案，第一传感器410与注液件300之间的初始距离可调，该第一传感器410与注液件300之间的初始距离可以根据注液件300与电池100之间的距离进行设计。在电池100的型号或外形尺寸发生变化时，注液件300的注液移动路径同步会发生变化，适配于该注液件300的注液移动路径，该第一传感器410与注液件300之间的初始距离以及检测过程中的预设移动路径P也同步发生变化，可以使得第一传感器410能够应用于多种不同型号或外形尺寸的电池100的注液件300的检测。
作为示例而非限定，该第一传感器410在预设移动路径P的延伸方向上的移动距离可在0至50mm之间。该移动距离范围可适配于相关技术中大部分电池的尺寸，因而，本申请实施例提供的第一传感器410能够适用于相关技术中大部分电池的注液件，有利于该第一传感器410在电池产线中的推广和使用。
图16示出了本申请实施例提供的另一电池的注液方法60的示意性流程框图。可选地，该注液方法60同样可适用于上文实施例所示的电池100。
如图16所示，该电池的注液方法60可包括以下步骤。
S601：在电池的注液口设置密封件。
S602：在电池上设置注液安全装置，该注液安全装置中形成有对应于密封件的注液件通道。
S603：向注液件通道刺入注液件，以使得该注液件通过注液件通 道刺入密封件以进入电池的内部。
S604：通过注液件排放电池的内部气体。
S605：通过注液件向电池的内部注入电解液。
S606：将注液件抽离密封件。
S607：利用第一传感器检测注液件的端部是否完整。
S608：利用第二传感器检测注液件的端部是否歪斜。
具体地，在本申请实施例中，电池100可设置有注液口1312。在步骤S601中，可利用电池产线中的密封件安装装置在电池100的注液口1312上设置密封件140。可选地，该密封件140可以为橡胶件，作为示例，该密封件140可以为胶钉。
在步骤S602中，在电池100上设置注液安全装置200。作为示例，该注液安全装置200可以为注液安全帽，该注液安全帽可扣合于电池100的注液口1312的所在壁，以实现注液安全帽在电池100上的稳定安装。
另外，注液安全装置200中形成有对应于电池100的密封件140的注液件通道210，在步骤S603中，注液件300可通过注液安全装置200中的注液件通道210刺入密封件140，进而进入电池100的内部。
在该实施方式中，注液安全装置200可对电池100进行防护，降低了注液件300刺偏对电池100造成影响的可能性，从而提升了电池100在注液过程中的制造性能以及电池100的使用可靠性。
可选地，该注液安全装置200的材料可包括高分子聚合物，例如PEEK等等。该注液安全装置200对电池100的金属壳体造成的磨损较小，能够稳定且可靠的应用于电池100的注液过程中。
在步骤S604中，可将抽气装置连接于注液件300，抽气装置用于通过注液件300抽取电池100的内部气体。可选地，在经过抽气装置抽气后，该电池100的内部可形成负压。
在一些实施方式中，该抽气装置抽取的电池100的内部气体可以为电池100在闭口化成过程中产生的气体。具体地，在步骤S604之前，注液装置可通过注液件300向电池100的内部注入一部分电解液，注液件300抽离密封件140之后，电池100执行闭口化成过程。在执行完成闭合化成 之后，注液件300重新刺入密封件140，抽气装置可通过注液件300抽取电池100在闭口化成过程中产生的气体。
在步骤S605中，注液装置可通过注液件300向电池100的内部注入电解液。在电池100的内部为负压的情况下，注液装置中的电解液可快速通过注液件300注入电池100的内部。
可选地，若电池100执行了闭口化成过程，则在该步骤S605中，注液装置可通过注液件300向电池100的内部注入剩余部分的电解液，以完成电池100的整个注液过程。
在步骤S606中，可将注液件300抽离密封件140。该密封件140可以为弹性密封件，在注液件300抽离后，该弹性密封件可以实现“自愈合”，即该弹性密封件可以发生弹性形变，以减小注液件300在该弹性密封件中形成的缺口，该缺口的尺寸可十分微小乃至忽略不计，因而电池100内部的电解液不会通过该缺口泄露至电池100之外。
在步骤S607中，可利用第一传感器410检测注液件300的端部是否完整。具体地，可控制注液件300沿预设移动路径P移动，该第一传感器410位于该预设移动路径P中，例如，位于预设移动路径P的终点或下游，该第一传感器410可检测注液件300的接触或注液件300的移动行程，从而检测注液件300的端部的完整性。
在步骤S608中，可利用第二传感器420检测注液件300的端部是否歪斜。具体地，可控制注液件300沿预设移动路径P移动，该第二传感器420中的检测通道421可位于该预设移动路径P中，第二传感器420可通过检测注液件300的端部是否接触于检测通道421的内周面检测注液件300的端部是否歪斜。
可选地，上述预设移动路径P与注液件300在注液过程中的注液移动路径相同。在对电池100进行注液后，可先移动电池100，将包括第一传感器410和第二传感器420的检测装置移动至之前电池100的所在位置，控制注液件300移动，以使得注液件300进入检测装置，第一传感器410和第二传感器420分别对该注液件300进行完整性和歪斜性的检测。
在执行步骤S607和步骤S608对注液件300进行检测后，该注液 件300可执行对下一个电池100的注液。
可选地，上述步骤S607和步骤S608所涉及的注液件300的检测还可执行于对当前电池100的注液过程之前，例如，执行与步骤S602或步骤S601之前。
上文结合图2至图16说明了本申请提供的电池的注液方法，下面结合图17说明本申请提供的电池的注液系统。该电池的注液系统可执行上文任一实施例中的注液方法。可以理解的是，下文实施例中注液系统的相关技术方案可以与上文实施例中注液方法的相关技术方案相互对应，具体方案细节可以参见上文实施例的相关描述，下文不做过多赘述。
如图17所示，电池的注液系统1可包括：密封件安装装置500、注液件300以及注液装置600。其中，密封件安装装置500用于获取密封件140并在电池100的注液口1312设置该密封件140，注液件300用于刺入密封件140以进入电池100的内部，注液装置600连接于注液件300，该注液装置600用于通过注液件300向电池100的内部注入电解液。
在一些可能的实施方式中，继续参见图17所示，电池的注液系统1还包括：注液安全装置200，该注液安全装置200的具体结构可以参见上文图8至图10所示实施例的相关描述。
具体地，该注液安全装置200设置于电池100，且该注液安全装置200中形成有对应于密封件140的注液件通道210，注液件通道210用于通过注液件300，以使得该注液件300通过注液件通道210刺入密封件140以进入电池100的内部。
在一些可能的实施方式中，上述注液安全装置200可包括：注液安全帽，该注液安全帽扣合于电池100。
在一些可能的实施方式中，如图17所示，电池的注液系统1还包括：注液检测装置400，该注液检测装置400用于检测注液件300的端部。例如，该注液检测装置400可用于检测注液针的针头。
在一些可能的实施方式中，注液件300可被配置为沿预设移动路径P移动，注液检测装置400包括：第一传感器410，该第一传感器410朝向注液件300的端部设置且位于预设移动路径P中，该第一传感器410用 于检测注液件300的端部的移动以检测该注液件300的端部是否完整。
在一些可能的实施方式中，注液检测装置400可包括：第二传感器420，该第二传感器420中形成有对应于注液件300的检测通道421，该检测通道421位于预设移动路径P中，且该检测通道421用于通过注液件300以检测该注液件的端部是否歪斜。
可选地，该注液检测装置400中的第一传感器410和第二传感器420的具体结构以及相关技术方案可以参见上文图13至图15所示实施例的相关描述。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (27)

  1. 一种电池的注液方法，其特征在于，包括：
    在所述电池的注液口设置密封件；
    向所述密封件刺入注液件以使得所述注液件穿过所述密封件进入所述电池的内部；
    通过所述注液件向所述电池的内部注入电解液；
    在所述通过所述注液件向所述电池的内部注入电解液之前，所述注液方法还包括：
    通过所述注液件排放所述电池的内部气体。
  2. 根据权利要求1所述的注液方法，其特征在于，所述通过所述注液件排放所述电池的内部气体，包括：
    通过所述注液件抽取所述电池的内部气体，以使得所述电池的内部形成负压。
  3. 根据权利要求1所述的注液方法，其特征在于，所述电池的内部气体包括所述电池在执行闭口化成的过程中产生的气体。
  4. 根据权利要求1至3中任一项所述的注液方法，其特征在于，所述密封件为弹性材料，在所述通过所述注液件向所述电池的内部注入电解液之后，所述注液方法还包括：
    将所述注液件抽离所述密封件，其中，在所述注液件抽离后，所述密封件弹性形变以减小所述注液件在所述密封件中形成的缺口。
  5. 根据权利要求1至3中任一项所述的注液方法，其特征在于，所述向所述密封件刺入注液件以使得所述注液件穿过所述密封件进入所述电池的内部，包括：
    在所述电池上设置注液安全装置，所述注液安全装置中形成有对应于所述密封件的注液件通道；
    向所述注液件通道刺入所述注液件，以使得所述注液件通过所述注液件通道刺入所述密封件以进入所述电池的内部。
  6. 根据权利要求5所述的注液方法，其特征在于，所述注液安全装置包括：注液安全帽；
    其中，所述在所述电池上设置注液安全装置，包括：
    将所述注液安全帽扣合于所述电池。
  7. 根据权利要求5所述的注液方法，其特征在于，所述注液件通道远离于所述电池的一端形成有第一斜面导向槽，所述第一斜面导向槽的斜面相对于所述注液件通道的轴向倾斜设置，所述第一斜面导向槽用于引导所述注液件进入所述注液件通道。
  8. 根据权利要求7所述的注液方法，其特征在于，所述第一斜面导向槽包括锥面导向槽。
  9. 根据权利要求6所述的注液方法，其特征在于，所述注液安全帽扣合于所述电池的一端设置有第二斜面导向槽，所述第二斜面导向槽的斜面相对于所述电池的壁倾斜，所述第二斜面导向槽用于引导所述电池扣合于所述注液安全帽。
  10. 根据权利要求9所述的注液方法，其特征在于，所述第二斜面导向槽包括锥面导向槽。
  11. 根据权利要求5所述的注液方法，其特征在于，所述注液安全装置的材料包括高分子聚合物。
  12. 根据权利要求1至3中任一项所述的注液方法，其特征在于，所述注液方法还包括：
    检测所述注液件的端部。
  13. 根据权利要求12所述的注液方法，其特征在于，所述检测所述注液件的端部，包括：
    控制所述注液件沿预设移动路径移动，所述预设移动路径中设置有第一传感器；
    利用所述第一传感器检测所述注液件的端部的移动以检测所述注液件的端部是否完整。
  14. 根据权利要求13所述的注液方法，其特征在于，所述第一传感器设置于所述预设移动路径的端点；
    其中，所述利用所述第一传感器检测所述注液件的端部的移动以检测所述注液件的端部是否完整，包括：
    在所述注液件的端部接触所述第一传感器的情况下，检测所述注液件的端部完整；
    在所述注液件的端部未接触所述第一传感器的情况下，检测所述注液件的端部缺失。
  15. 根据权利要求13所述的注液方法，其特征在于，所述第一传感器设置于所述预设移动路径的下游；
    其中，所述利用所述第一传感器检测所述注液件的端部的移动以检测所述注液件的端部是否完整，包括：
    在所述注液件的端部的移动行程大于或等于预设阈值的情况下，检测所述注液件的端部完整；
    在所述注液件的端部的移动行程小于所述预设阈值的情况下，检测所述注液件的端部缺失。
  16. 根据权利要求12所述的注液方法，其特征在于，所述检测所述注液件的端部，包括：
    控制所述注液件沿预设移动路径移动，所述预设移动路径中设置有第二传感器，所述第二传感器中形成有用于通过所述注液件的检测通道；
    利用所述第二传感器中的检测通道检测所述注液件的端部是否歪斜。
  17. 根据权利要求16所述的注液方法，其特征在于，所述利用所述第二传感器中的检测通道检测所述注液件的端部是否歪斜，包括：
    在所述注液件的端部接触所述检测通道的内周面的情况下，检测所述注液件的端部歪斜；
    在所述注液件的端部未接触所述检测通道的内周面的情况下，检测所述注液件的端部未歪斜。
  18. 根据权利要求13所述的注液方法，其特征在于，所述预设移动路径与所述注液件对所述电池进行注液时的注液移动路径相同。
  19. 根据权利要求1至3中任一项所述的注液方法，其特征在于，所述密封件的材料包括橡胶。
  20. 根据权利要求1至3中任一项所述的注液方法，其特征在于，所述密封件在中部区域的厚度小于所述密封件在边缘区域的厚度。
  21. 根据权利要求20所述的注液方法，其特征在于，所述密封件在所述中部区域的第一表面形成有第一凹槽，所述第一表面为所述密封件朝向所述电池的外部的表面；和/或，
    所述密封件在所述中部区域的第二表面形成有第二凹槽，所述第二表面为所述密封件朝向所述电池的内部的表面。
  22. 一种电池的注液系统，其特征在于，包括：
    密封件安装装置，用于获取密封件并在所述电池的注液口设置所述密封件；
    注液件，用于刺入所述密封件以进入所述电池的内部，所述注液件用于排放所述电池的内部气体；
    注液装置，连接于所述注液件，所述注液装置用于通过所述注液件向所述电池的内部注入电解液。
  23. 根据权利要求22所述的注液系统，其特征在于，所述注液系统还包括：注液安全装置，设置于所述电池；
    所述注液安全装置中形成有对应于所述密封件的注液件通道，所述注液件通道用于通过所述注液件，以使得所述注液件通过所述注液件通道刺入所述密封件以进入所述电池的内部。
  24. 根据权利要求23所述的注液系统，其特征在于，所述注液安全装置包括：注液安全帽，所述注液安全帽扣合于所述电池。
  25. 根据权利要求22至24中任一项所述的注液系统，其特征在于，所述注液系统还包括：注液检测装置，所述注液检测装置用于检测所述注液件的端部。
  26. 根据权利要求25所述的注液系统，其特征在于，所述注液件被配置为沿预设移动路径移动，所述注液检测装置包括：第一传感器，朝向所述注液件的端部设置且位于所述预设移动路径中，所述第一传感器用于检测所述注液件的端部的移动以检测所述注液件的端部是否完整。
  27. 根据权利要求25所述的注液系统，其特征在于，所述注液件被配置为沿预设移动路径移动，所述注液检测装置包括：第二传感器，所述第二传感器中形成有对应于所述注液件的检测通道，所述检测通道位于所述预设移动路径中，且所述检测通道用于通过所述注液件以检测所述注液件的端部是否歪斜。
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